Entries |
Document | Title | Date |
20080221810 | Method and Apparatus for Measuring the Stress or Strain of a Portion of a Ferro-Magnetic Member - A method and apparatus for measuring stress or strain in a portion of a ferromagnetic member is disclosed in which advantage is taken of the fact that the magnetic properties of a ferromagnetic member change with applied tensile or compressive stress. A magnetic hysteresis loop is measured in a portion of a ferromagnetic member and a model of a magnetic hysteresis loop is fitted to the measured magnetic hysteresis loop by varying at least one stress or strain dependent model variable and the fitted at least one variable is used to determine the stress or strain of the portion. The particular model disclosed is a predator/prey pursuit model wherein the prey is the applied field and the predator is the flux density. | 09-11-2008 |
20080249720 | COMPOSITE RISER WITH INTEGRITY MONITORING APPARATUS AND METHOD - An integrity monitoring system for monitoring degradation in a composite riser string. The system includes composite riser structures incorporating strain and vibration sensors to measure changes in the stiffness strain on a first orientation and on a second orientation. The system can also include monitoring modules attached to each individual riser and devices to transfer the data from the monitoring module to the surface controller. Additionally, the monitor system can provide for an alarm when predetermined warning limits are exceeded. | 10-09-2008 |
20080249721 | Predicting changes in hydrofrac orientation in depleting oil and gas reservoirs - Stress rotation due to depletion can be estimated in reservoirs having an impermeable reservoir boundary. More specifically, the isotropic change in stress due to depletion, and the uniaxial stress resulting from a change in pore pressure across an impermeable boundary are both modeled as perturbations to an initial stress state. These perturbations can result in a rotation of the principal stress directions. Estimates of the stress rotation are helpful for hydraulic fracturing operations, because fracture tends to occur in a plane perpendicular to the least principal stress. | 10-09-2008 |
20080249722 | Method for Determination of Strain Distribution in Components - A method for determination of strain distribution in components, in particular in gas turbine components, is disclosed. In an embodiment, the method includes: a) vibrational excitation of the component and measured recording of a vibrational amplitude distribution of the component for a number of measured points by means of a vibrometer, each measuring point being determined by three coordinates and the measured vibrational amplitude distribution of each measuring point being a vectorial parameter; b) smoothing of the vibrational amplitude distribution recorded by measurement for each measuring point; c) definition of polygonal elements, wherein each measuring point forms a corner of at least one element; d) calculation of a tensor strain condition for each of the polygonal elements from the tensor vibrational amplitude distributions present in the corners of the elements; and e) calculation of the strain distribution in the corners of the elements from the strain conditions of the elements. | 10-09-2008 |
20080262753 | Foil-Type Pressure Sensor and Method for Evaluating the Sensor Response - A method for determining an occupancy related status relating to a vehicle seat by means of a foil-type pressure sensing mat comprises the steps of determining a raw sensor resistance value of said plurality of pressure sensing cells, determining a raw compensation resistance value of said at least one compensation resistance, calculating a compensated sensor resistance value based on said raw sensor resistance value and said raw compensation resistance value, and determining said occupancy related status based on said compensated sensor resistance value. According to the invention said step of calculating a compensated sensor resistance value comprises the steps of obtaining a corrected compensation resistance value by applying a correction term to said raw compensation resistance value, said correction term being determined by production tolerances of said compensation resistance, and calculating said compensated sensor resistance value based on said raw sensor resistance value and said corrected compensation resistance value. | 10-23-2008 |
20080262754 | System and method for fatigue forecasting and strain measurement using Integral Strain Gauge (ISG) - The present invention relates to means, system and method for measurement of stress strain and fatigue forecasting by the means of Integral Strain Gauges (ISGs) capable of recording information from a surface of a tested object, mathematical processor for analysis of the information recorded on the surface of such gauges. Integral Strain Gauges produced from a custom made reaction sensitive materials. | 10-23-2008 |
20080300801 | Method for estimating magnitude of back-and-forth-direction force exerted on tire - A method for estimating the magnitude of a back-and-forth-direction force exerted on a tire comprises: using a plurality of strain sensors fixed to a tire sidewall capable of outputting data on the magnitude of a strain occurred at the position of the strain sensor; reading the output data from the strain sensors when come to fixed measuring positions predetermined around the tire rotational axis; in relation to each of the strain sensors at the respective measuring positions, calculating the back-and-forth-direction force as an intermediate result by the use of the data read from the strain sensor and a relational expression, whereby the intermediate results are obtained from the respective strain sensors; and computing a mean value of only the valid intermediate result(s) so as to output it as the estimated magnitude of the force. | 12-04-2008 |
20080312848 | System and method for in-situ monitoring of composite materials - In a non-limiting, exemplary system for in-situ monitoring of a composite workpiece, at least one ultrasonic testing transducer is mounted to a surface of a composite workpiece and configured to transmit and receive ultrasonic energy to and from the composite workpiece during mechanical loading of the composite workpiece. An ultrasonic pulser/receiver is operatively coupled to the at least one ultrasonic testing transducer. A computing system is operatively coupled to the ultrasonic pulser/receiver. The computing system includes a data acquisition component configured to acquire data from the ultrasonic pulser/receiver and a data analysis component configured to analyze the acquired data. The data analysis component may be further configured to analyze the acquired data for initiation of failure of the composite workpiece and/or growth of failure of the composite workpiece. Further, failure of the composite workpiece may include cracking and/or delaminating and/or disbonding. | 12-18-2008 |
20090024335 | METHOD, SYSTEM, AND COMPUTER PROGRAM PRODUCT FOR CALCULATING THE RESIDUAL STRESS EQUILIBRIUM OF TWO CONCENTRIC CYLINDERS COLDWORKED BY A LOADING-UNLOADING EXPANSION PROCESS - A method, system, and computer program product for calculating the residual stress equilibrium of two elastoplastic cylinders coldworked by expansion to obtain interference fit. The deformation state due to an internal expansion load applied to an inner cylinder that will result in interference of the inner cylinder with the outer cylinder can be calculated. The deformation state due to an unloading of the internal expansion load that will result in assembly of the inner cylinder and the outer cylinder can be calculated. The residual stresses, residual displacement and residual strains in the inner cylinder and the outer cylinder, whether they are eventually interference fitted or not, can all be calculated and recorded. | 01-22-2009 |
20090048790 | System for Determining a Vehicle Load | 02-19-2009 |
20090076743 | NOVEL METHOD FOR ZERO POINT DETECTION - The present invention relates to a method for the simple, objective and accurate determination the zero point or effective zero point of a material, the point of first contact between an indenter tip and the surface of a material. The zero point is determined by using a sensor having a tip and capable of continuous stiffness measurement. By applying a data shift, which insures that the stiffness versus contact parameter curve is linear and goes through the origin of the graph, it is possible to determine the zero point based on combined data from indentation and from superimposed continuous stiffness measurement oscillations. | 03-19-2009 |
20090088986 | SYSTEM AND METHOD FOR DETECTING FURNITURE CRUISING FREQUENCY TO MONITOR GAIT DECLINE - A system and method for detecting furniture cruising frequency to monitor gait decline. Embodiments of the invention monitor the frequency of furniture cruising in one's home in such a way that it does not require daily user intervention to operate. Here, shock sensors are attached or integrated into furniture in the normal walking paths for an individual in his or her home. Through the use of these shock sensors, embodiments of the invention are able to monitor the frequency of furniture cruising for the individual. If the frequency of furniture cruising exceeds a certain threshold, an assistive support device such as a walking stick or a walking frame may be required for the individual. Other embodiments are described and claimed. | 04-02-2009 |
20090112489 | METHODS AND SYSTEMS FOR MODELING MATERIAL BEHAVIOR - A method for modeling material behavior includes using empirical three dimensional non-uniform stress and strain data to train a self-organizing computational model such as a neural network. A laboratory device for measuring non-uniform stress and strain data from material includes an enclosure with an inclusion in it. As the enclosure is compressed, the inclusion induces a non-uniform state of stress and strain. A field testing device includes a body having a moveable section. When the body is inserted in a material and the moveable section moved, a non-uniform state of stress and strain can be characterized. | 04-30-2009 |
20090125251 | METHOD FOR DETERMINING A FORCE AT THE HUB OF A WHEEL OF A VEHICLE WHILE TRAVELING AND WHEEL SUITABLE FOR ALLOWING SAID METHOD TO BE CARRIED OUT - A method for determining the force at the hub of a wheel of a vehicle while traveling. The wheel includes a rim and at least one deformation sensor directly associated with the rim in at least one predetermined position and arranged according to at least one predetermined orientation. The method includes the steps of detecting at least one deformation component of the rim during travel through the at least one deformation sensor; applying to the at least one deformation component, during travel, a correlation parameter characteristic of the rim, between the force at the hub and the relative deformation of the rim to determine at least one force component at the hub correlated with the at least one deformation component of the rim. The determining of the correlation parameter preferably takes place through experimental tests that include the steps of providing a sample wheel having a rim substantially the same as that of the wheel and determining at least one correlation coefficient between at least one force component acting upon the sample wheel at the hub along at least one predetermined direction and at least one respective deformation component of the rim of the wheel. | 05-14-2009 |
20090132183 | SYSTEM AND METHOD FOR MONITORING STRUCTURES - A technique facilitates the monitoring of elongate structures. An elongate structure is combined with an optical fiber deployed along the structure. An interrogation system is operatively joined with the optical fiber to input and monitor optical signals to determine any changes in parameters related to the structure. | 05-21-2009 |
20090177417 | FRACTURE PREDICTION METHOD, DEVICE, A PROGRAM ARRANGEMENT AND COMPUTER-ACCESSIBLE MEDIUM THEREFOR - According to exemplary embodiments of the present invention, using a fracture limit stress line obtained by converting a hole expansion ratio into a stress as a criterion for a fracture, the risk of fracture in a material can be evaluated quantitatively by comparing the relationship between data obtained from a numerical analysis using a finite element method and the fracture limit stress line. Thus, when determining a fracture limit in a stretch flange portion in a thin plate in a process including one or more deformation path variations, it is possible to obtain the fracture limit curve easily and efficiently and predict the fracture with high accuracy, and the risk of fracture upon press forming or crash can be evaluated. | 07-09-2009 |
20090192731 | System and Method for Monitoring a Health State of Hydrocarbon Production Equipment - A device for monitoring the health state of hydrocarbon production equipment is disclosed. The device has a plurality of targets, which are associated with the hydrocarbon production equipment. A record of the initial target positions and/or dimensions relative to the hydrocarbon production equipment is created. A sensor that is compatible with the targets is used to observe the targets and produce a sensor output. An analysis device uses the record of the initial positions, dimensions and the sensor output to determine one or more health state parameters, which may be used to determine the health state of the hydrocarbon production equipment. | 07-30-2009 |
20090210173 | Independently Calibrated Wireless Structural Load Sensor - A device includes a removable load element. The removable load element includes a pin portion and a housing portion. The pin portion extends from the housing portion. The pin portion includes a sensor. The housing portion includes an electronic circuit connected to the sensor. | 08-20-2009 |
20090254288 | Electrospun fibrous nanocomposites as permeable, flexible strain sensors - The present invention generally relates to methods to provide electrospun polymer/nanoparticle composite-fiber structures for use as lightweight, compliant, porous strain sensors for non-cyclic strain sensing. In one embodiment, the fibers in the nanocomposites comprise, for example, poly(∈-caprolactone) (PCL) dielectric polymer matrix with embedded electrically conductive carbon black (CB) nanoparticles. In another embodiment, the composite-fiber structures of the present invention contain at least about 7 weight percent or more of CB and are electrically conducting in the as-spun, un-deformed state, and are thus called conductive polymer composites (CPC). In still another embodiment, the electrical resistance of a nanocomposite structure according to the invention increases with strain, and at sufficiently high strains the structure is rendered non-conductive. | 10-08-2009 |
20090259414 | Multi-dimension detector with half bridge load cells - A multi-dimension detector with half bridge load cells, which includes an analog to digital converter (ADC), a plurality of half bridge load cells, a multiplexer and a central processing unit (CPU). The CPU controls the multiplexer to form a plurality of full bridge load cells by selecting either-two of the half bridge load cells and detect a plurality of measures corresponding to an object. The ADC converts analog signals corresponding to the plurality of measures into digital signals. The CPU determines all dimension values of the object according to the plurality of measures corresponding to the digital signals. | 10-15-2009 |
20090265120 | METHOD AND APPARATUS FOR MONITORING A STRUCTURE - A method of monitoring a structure, the method comprising positioning one or more strain gauges on the structure; acquiring strain data with the gauges(s); analyzing the strain data to determine whether the structure has undergone plastic deformation; and providing an output in accordance with the analysis. | 10-22-2009 |
20090299656 | TYRE MANAGING APPARATUS - In this tyre managing apparatus, with regard to respective tyres, the back-and-forth force and the lateral force which are added to each of tyres are calculated based on the distances which are distance between each tyre and the center of gravity in the back-and-forth direction, the inertia moment of the vehicle, the vehicle weight of the vehicle, and the loads added to each of the tyres, which are as specification data of the vehicle, and based on the longitudinal acceleration, the lateral acceleration, and the yew angle acceleration, which are as state quantities of the vehicle. Also, the calculated results are memorized in the transponders of corresponding tyres. | 12-03-2009 |
20090306910 | High density, rectangular binary code symbol - A binary code symbol for non-linear strain measurement designed specifically for perimeter-based deformation and strain analysis. The symbol is rectangular with a continuous outer perimeter, two data regions along adjacent sides of the rectangle and a utility region adjacent each side opposite the data regions. Each data region is made up of at least two rows, each of which is made up of a number of data cells, and each utility region is made up of at least two rows, each of which is made up of utility cells with alternating appearance. There are at least two distinct finder cells on opposite corners of the rectangle, which can be used to orient the symbol. A non-linear strain gage for measuring the strain on an object under load in accordance includes a target, a sensor, and a computer, wherein the target is a binary code symbol. | 12-10-2009 |
20090312960 | Characterizing Thermomechanical Properties of an Organic Substrate Using Three-Dimensional Finite Element Analysis - A method for characterizing thermomechanical properties of an organic substrate includes the steps of: receiving an image of the substrate, the image including a geometric description of the circuit layers of the substrate; selecting a given one of the circuit layers for processing; converting the image to a 2-D FEM image of the given circuit layer; repeating the steps of selecting a given one of the circuit layers and converting the image to a 2-D FEM image of the selected layer until all of the layers have been processed; combining all of the 2-D FEM images corresponding to the layers to form a 3-D FEM image representing at least a portion of the substrate; determining a coefficient of thermal expansion (CTE), modulus and/or Poisson's ratio of the 3-D FEM image; and constructing a 3-D representation of the substrate as a function of the CTE, modulus and/or Poisson's ratio of the 3-D FEM image. | 12-17-2009 |
20090312961 | Multi-format,binary code symbol for non-linear strain measurement - A binary code symbol for non-linear strain measurement that can be constructed in any geometric shape having a solid, continuous perimeter containing straight line segments. The symbol includes finder cells to “orient” the symbol in order to associate strain measurements with physical dimensions; and contains encoded data in “data regions” and/or “utility regions.” The data and utility regions can be distinct and separate, combined, exclusive (i.e. data regions and no utility regions, or utility regions and no data regions), or omitted. The data “density” can be varied depending upon the application, by varying the number of distinct data or utility cells present in the data regions or utility regions. | 12-17-2009 |
20090319202 | Delay-Based Bias Temperature Instability Recovery Measurements for Characterizing Stress Degradation and Recovery - A method, test circuit and test system provide measurements to accurately characterize threshold voltage changes due to negative bias temperature instability (NBTI) and positive bias temperature instability (PBTI). Both the bias temperature instability recovery profile and/or the bias temperature shifts due to rapid repetitions of stress application can be studied. In order to provide accurate measurements when stresses are applied at intervals on the order of tens of nanoseconds while avoiding unwanted recovery, and/or to achieve recovery profile sampling resolutions in the nanosecond range, multiple delay or ring oscillator frequency measurements are made using a delay line that is formed from delay elements that have delay variation substantially caused only by NBTI or PBTI effects. Devices in the delay elements are stressed, and then the delay line/ring oscillator is operated to measure a threshold voltage change for one or more measurement periods on the order of nanoseconds. | 12-24-2009 |
20090326836 | Two dimensional bar code having increased accuracy - A two-dimensional matrix code containing dark and light square data modules, and a finder pattern of two bars of alternating dark and light square data modules on the perimeter of the symbol for indicating both orientation and printing density of the symbol, wherein all of the data modules are the same dimension and data is encoded based on the absolute position of the dark modules within the matrix. In a first embodiment inner and outer solid bars are provided along the base and right-hand side of the matrix code symbol, the inner and outer solid bars each having a width equal to the square data modules, the inner solid bar being light and the outer solid bar being dark. In a second embodiment, an inner solid bar and an outer encoding bar are provided along the base and right-hand side of the matrix code symbol. | 12-31-2009 |
20100004877 | DEVICE FOR THE SIMULATION OF THE AGING OF POLYMERIC MATERIALS - The present invention relates to a device that simulates the conditions causing the aging of polymeric material used in agricultural environments in order to obtain information about the rate of degradation of the material. For this purpose, the device of the invention exposes a test specimen of polymeric material to radiation, temperature, mechanical stress, humidity, etc. conditions and checks the effect produced in the material. | 01-07-2010 |
20100004878 | WIND TURBINE MONITORING - A method of monitoring the performance of a wind turbine ( | 01-07-2010 |
20100049451 | Material property identification system and methods - The distributive elastic properties in nonlinear structures is characterized using an inverse elastostatic approach of stress analysis using assumed elastic models without knowing the realistic material parameters. Stress distributions are computed independently of strain measurements. A database of pointwise stress and strain data in regions of the nonlinear structure permits the elastic properties of the structure to be characterized point-by-point to provide the property distribution. | 02-25-2010 |
20100057381 | IMPOSING AND DETERMINING STRESS IN SUB-MICRON SAMPLES - This invention provides a method and device for imposing and determining mechanical stress and/or strain, on micro-scale and nano-scale beams, films or multi-layers of materials such as metallic materials, polymer materials, ceramic materials, carbon-based materials and silicon-based materials using a set of micro- or nano-machines. The present invention also provides methods to derive and modify various properties or state of such nano- or microstructures, among others mechanical properties, and to measure the external stimulus that they are subjected to. | 03-04-2010 |
20100076700 | SYSTEM FOR OPTICAL FIBER STRAIN MEASURE - A system measures the strain of an object. The system includes a laser source for generating an output radiation, a strainable optical fiber having first and second facets, and means for calculating a measure of a strain of the optical fiber. The first facet is coupled to the laser source for receiving the output radiation and for transmitting therefrom a guided radiation over the optical fiber towards the second facet. The second facet is adapted to receive the guided radiation and to reflect a corresponding reflected radiation towards the first facet. The laser source is a self-mixing type adapted to receive at least part of the reflected radiation and to mix the output radiation with the received radiation. The calculating means calculate the measure of the strain of the optical fiber through the linear displacement of the second section measured by the self-mixing effect in the laser source. | 03-25-2010 |
20100100338 | Monitoring system - A monitoring system is provided, which may include a structural component configured to undergo mechanical loading and a wireless node attached to the structural component. The node may include a strain sensing device configured to measure strain experienced by the structural component at the location of the node. The node may also include a processor configured to predict, based on the strain measurements, fatigue life of the structural component. | 04-22-2010 |
20100114505 | METHODS, PROGRAM PRODUCTS, AND SYSTEMS FOR ESTIMATING THE STRESS-STRAIN RELATIONSHIP OF A TOUGHENED STRUCTURAL ADHESIVE POLYMER - Methods, program products, and computer systems for estimating a stress of a toughened structural adhesive polymer are provided. One method comprises selecting a strain, a strain rate, a temperature, or a combination thereof at which the stress is to be estimated. A value of a strain-hardening stress of the toughened structural adhesive polymer is determined, wherein the value of the strain-hardening stress is dependent on the temperature and the strain. A value of a non-strain-hardening stress of the toughened structural adhesive polymer is determined, wherein the value of the non-strain-hardening stress is dependent on the strain, the strain rate, and the temperature. The value of the strain-hardening stress is added to the value of the non-strain-hardening stress to obtain an estimated total stress. | 05-06-2010 |
20100161248 | Method for modeling a mounting assembly and a mounting assembly - The present disclosure is directed to a computer-implemented method for modeling a mounting assembly having a mounting strap configured to couple a component to a bracket. The method includes modeling a loosened configuration of the mounting strap, wherein the loosened configuration provides a first substantially continuous curvature of portions of the mounting strap engaged with the bracket and the component. The method also includes applying simulated stresses to the mounting strap in the loosened configuration and outputting failure mode information of the mounting strap based on the simulated stresses on the mounting strap. | 06-24-2010 |
20100179774 | METHOD FOR EVALUATING DURABILITY OF UNIT CELL, DEVICE FOR EVALUATING DURABILITY, PROGRAM FOR EVALUATING DURABILITY, AND UNIT CELL OF FUEL CELL - The present invention provides a unit cell durability evaluation method for evaluating a unit cell of a fuel cell including a polymer electrolyte membrane, two plate-like electrodes installed on both sides of the polymer electrolyte membrane, two plate-like separators having groove-like gas channels for supplying gases to the electrodes, and a seal component for sealing side faces of the electrodes, in a information-processing equipment, and the method involves a reception step (S | 07-15-2010 |
20100204932 | ANALYZING APPARATUS, ANALYZING METHOD, AND COMPUTER-READABLE RECORDING MEDIUM STORING AN ANALYZING PROGRAM - An analyzing method includes acquiring displacements with respect to loads applied of the test piece measured by the three-point bending test; calculating a first approximate expression of a relation of the displacements with respect to the loads applied in a first area where the relation is linear so as to determine an elasticity modulus of the test piece; extracting boundary value of a relation of strains caused by the displacements with respect to the loads so as to determine a yield stress value of the test piece; and calculating a second approximate expression of a relation of stress caused by the loads with respect to the strains caused by the displacements in a second area beyond the yield stress value on the basis of the yield stress value, the elasticity modulus, and the measurements in the second area. | 08-12-2010 |
20100223017 | COMPUTATIONAL METHOD OF MATERIAL CONSTANT OF COMPOSITE MATERIAL AND VOLUME FRACTION OF MATERIAL COMPONENT IN COMPOSITE MATERIAL, AND RECORDING MEDIUM - In computing the overall material constant of a composite material, a virtual composite material is defined as the one that predetermined material components are dispersed in a form of spherical particles in a matrix phase at known volume fractions, and a nonlinear equation having the overall material constant of the virtual composite material as an unknown is prepared. Next, the overall material constant of the composite material is computed by solving the nonlinear equation. The nonlinear equation is a recursive nonlinear equation which is obtained by defining the material constant in the surrounding areas of the spherical particles as the overall material constant of the composite material to be computed. The volume fraction of a material component dispersed in the composite material is computed using the recursive nonlinear equation. | 09-02-2010 |
20100241366 | SHAPE DEFECT FACTOR IDENTIFICATION METHOD, DEVICE, AND PROGRAM - Provided is a method for rapidly, surely, and easily identifying a factor of a shape defect of an artifact attributed to elastic recovery of deformation upon molding by using the numeric value simulation technique, thereby eliminating lowering of dimension accuracy. The method includes a step of calculating a stress distribution and distortion distribution working on an artifact before elastic recovery; a step of calculating a deformation amount δ | 09-23-2010 |
20100262383 | SENSOR-EQUIPPED BEARING FOR WHEEL - There is provided a sensor equipped wheel support bearing assembly including an outer member having an inner periphery formed with a plurality of rolling surfaces defined therein, an inner member having an outer periphery formed with rolling surfaces opposed to those rolling surfaces and a plurality of rows of rolling elements interposed between those rolling surfaces. One of the outer and inner members serving as a stationary member is provided with a strain amplifying mechanism for amplifying a strain in the stationary member, which occurs when the rolling elements pass by. A strain sensor element is provided for detecting the strain amplified by the strain amplifying mechanism. A calculator is provided for calculating from an output of the strain sensor element, the load acting on the bearing assembly or the load acting between the vehicle wheel and the road surface. | 10-14-2010 |
20100268483 | Methods and systems for enabling simulation of aging effect of a chrono-rheological material in computer aided engineering analysis - Methods and systems for enabling simulation of material aging effect of chrono-rheological materials in computer aided engineering (CAE) analysis are disclosed. According to one aspect, a set of material property tests is conducted for a chrono-rheological material of interest. Each test obtains a series of material properties such as relaxation test data at different age. The relaxation test data are measured by maintaining a specimen of the chrono-rheological material at a predetermined strain. A set of first and second time-dependent material aging effect parameters is determined by shifting and matching the series of relaxation test data between each pair of the tests. The set of first and second time-dependent material aging effect parameters in conjunction with a CAE analysis application module with a chrono-rheological material constitutive equation configured therein are then used for simulating material aging effect by performing a CAE analysis of an engineering structure containing at least in part the chrono-rheological material. | 10-21-2010 |
20100299085 | Method for indicating fatigue damage of a metal object - A method for indicating fatigue damage rate of a hardened metal object in relation to load cycles, N, exerted on the hardened metal object, wherein the hardened metal object presents a temperature essentially corresponding to the operating conditions of the hardened metal object is disclosed. It comprises calculating the fatigue rate based on an effective activation energy parameter for the dislocation climb process, Q, shear stress amplitude, T, the absolute local temperature of the hardened metal object, T, and load frequency, f. Methods for indicating fatigue and predicting life of a metal object are disclosed. | 11-25-2010 |
20100299086 | System and Method for Fatigue Forecasting and Strain Measurement Using Integral Strain Gauge (ISG) - The present invention relates to means, system and method for measurement of stress strain and fatigue forecasting by the means of Integral Strain Gauges (ISGs) capable of recording information from a surface of a tested object, mathematical processor for analysis of the information recorded on the surface of such gauges. Integral Strain Gauges produced from a custom made reaction sensitive materials. | 11-25-2010 |
20100312497 | METHOD AND DEVICE FOR DETERMINING CRITICAL BUFFETING LOADS ON A STRUCTURE OF AN AIRCRAFT - A method and device for determining critical buffeting loads on a structure of an aircraft is disclosed. The device ( | 12-09-2010 |
20100318304 | BEARING FOR WHEEL WITH SENSOR - A bearing assembly for a vehicle wheel with a sensor in which load acting on the bearing assembly and/or a tread surface is accurately detected is provided. The bearing assembly includes rolling elements between outer and inner members, a load detecting device in one of the outer and inner members provided as a stationary member, for detecting load acting on the bearing assembly, a rotation detecting device for detecting the rotation of the other member provided as a rotating member, an averaging circuit for calculating rotational speed of the rotating member from output of the rotation detecting device, determining from the calculated rotational speed a time period required for the rolling elements to revolve a pitch of arrangement thereof and calculating average value of output of the load detecting device during the period, and an estimating circuit for estimating the load from the average value. | 12-16-2010 |
20100332153 | Method of Determining Fatigue Life and Remaining Life - The present invention concerns a method of calculating the expected life of a hardened metal object in relation to a number of fatigue load cycles exerted on the hardened metal object. The method comprises determining the development of microstructural deterioration as a function of fatigue exposure time, deriving therefrom an equation for the development of a Fatigue Damage Index as a function of fatigue exposure time and relating this equation to a known critical value of the Fatigue Damage Index that leads to material failure. The present invention also provides a method of calculating the remaining life of a hardened metal object subjected to fatigue loading. | 12-30-2010 |
20110022332 | MONITORING WELLNESS USING A WIRELESS HANDHELD DEVICE - A method for detecting a subject's stress level associated with an activity includes (a) connecting the subject to a sensor that senses a value of a biometric; (b) during the activity, (i) repeatedly sensing the value of the biometric over each of a plurality of time windows; and (ii) computing, for each time window, a deviation in the sensed values of the biometric; and (c) detecting the stress level based on the computed deviations. In one implementation, the value of the biometric is a skin temperature measurement. The method may be implemented as an application in a wireless handheld device, such as a cellular telephone. | 01-27-2011 |
20110054808 | MONITORING SYSTEM FOR WELL CASING | 03-03-2011 |
20110098942 | SYSTEM AND METHODS TO DETERMINE AND MONITOR CHANGES IN MICROSTRUCTURAL PROPERTIES - A system and methods with which changes in microstructure properties such as grain size, grain elongation, texture, and porosity of materials can be determined and monitored over time to assess conditions such as stress and defects. An example system includes a number of ultrasonic transducers configured to transmit ultrasonic waves towards a target region on a specimen, a voltage source configured to excite the first and second ultrasonic transducers, and a processor configured to determine one or more properties of the specimen. | 04-28-2011 |
20110106459 | IN-SITU OPTICAL CRACK MEASUREMENT USING A DOT PATTERN - A method of detecting cracks in an object includes: capturing a first image of a pattern of marks in a region of interest on a surface of the object; constructing a finite element model of the region of interest having nodes corresponding to the marks in the pattern; subjecting the object to a first mechanical load to produce strains in the object; capturing a second image of the pattern; computing strains in the object based on relative changes in locations of the marks in the first and second images; modifying the finite element model to produce a crack versus surface strain map; capturing a third image of the pattern; and comparing the locations of marks in the third image to the crack versus surface strain map to identify a crack in the object. An apparatus that performs the method is also provided. | 05-05-2011 |
20110125421 | WHEEL BEARING WITH SENSOR - A sensor-equipped wheel support bearing assembly capable of accurately detecting the load acting on the bearing assembly is provided. The sensor-equipped wheel support bearing assembly includes a sensor unit in an outer member that serves as a stationary member. The sensor unit includes a strain generating member, having two or more contact fixing segments to be fixed to the stationary member, and two or more sensors for detecting strain in the strain generating member. The contact fixing segments are spaced from each other in a direction circumferentially of the stationary member at the same axial positions. An estimating section is provided in the bearing assembly for estimating load thereon based on the difference between respective output signals from the sensors by calculating amplitudes of the output signals or values corresponding to such amplitudes from the difference between the respective output signals. | 05-26-2011 |
20110137577 | STRAIN MEASUREMENT DEVICE AND METHOD OF STRAIN MEASUREMENT USING THE SAME - A strain measurement device includes a strain gauge, a holding device, a transverse strain recorder, and a data processing device. The strain gauge includes at least one first and at least one second layers of carbon nanotube films, each layer of carbon nanotube films having a plurality of carbon nanotubes. The carbon nanotubes in at least one first layer of carbon nanotube film align along a first direction. The carbon nanotubes in at least one second layer of carbon nanotube film align along a second direction. The holding device is used to fasten a specimen and the strain gauge. The transverse strain recorder is used to record a transverse strain of the strain gauge. The data processing device is used to calculate an axial strain of the strain gauge. | 06-09-2011 |
20110184664 | DIRECTLY APPLIED READ AND TRANSMIT - DIGITAL STRAIN ENCODER AND DIGITAL LOAD CELL - A digital strain encoder includes a gage-emitter, a sensor-receiver, a transmitter, and an energy source. The gage-emitter is affixable to a surface to be measured and deformable on a one-to-one basis with the surface, and emits a reference strain signal in the absence of strain and an altered strain signal when the surface is subjected to strain and the gage-emitter is deformed. The gage-emitter also emits a unique reference identification signal. The sensor-receiver floats over the gage-emitter so as not to deform with the surface, and detects the reference and altered strain signals and the identification signal emitted by the gage-emitter. The transmitter is coupled to the sensor-receiver for transmitting the detected reference and altered strain signals to a remote receiver. | 07-28-2011 |
20110184665 | WIND TURBINE ROTOR BLADE COMPRISING AN EDGE-WISE BENDING INSENSITIVE STRAIN SENSOR SYSTEM - A wind turbine rotor blade having a strain sensor system is described. The strain sensor is insensitive to the effect of twisting motions or edge-wise bending on the measurement of the strain. The sensor comprises one or more strain sensing devices arranged in a circular or regular polygon shaped path enclosing a region of the component. In the sensor system, a plurality of strain sensors are spaced longitudinally along a flap-wise axis of the wind turbine rotor blade, | 07-28-2011 |
20110191036 | DIRECT CONTACT FORCE MEASUREMENT SYSTEM - A system for measuring forces from a rotating object is presented. In one aspect, the measurement system has a plurality of strain sensors that are configured to attach to the sidewall of a tire of a vehicle and measure the strain on the sidewall. The system can also have a data processor to relate the strain on the sidewall to the normal force exerted on the driving surface from the tire. | 08-04-2011 |
20110202289 | SYSTEM AND METHOD FOR REMOTE SENSING AND WIRELESS ENERGY TRANSFER ON CONDUCTIVE BODY - A system is provided for monitoring one or more parameters of a structure. The system includes a first sensor, a second sensor and a processing portion. The first sensor can detect the parameter of a first portion of the structure at a first location and can wirelessly transmit a first detected signal based on the detected parameter of the first portion of the structure at the first location. The second sensor can detect the parameter of a second portion of the structure at a second location and can wirelessly transmit a second detected signal based on the detected parameter of the second portion of the structure at the second location. The processing portion has an electromagnetic energy radiation portion. The processing portion can receive a first signal and a second signal and can wirelessly transfer energy to the first sensor and the second sensor. The first signal is based on the first detected signal, whereas the second signal is based on the second detected signal. The processing portion is operable to wirelessly transfer electromagnetic energy to enable the first and the second sensors. In cases that the structure has a metal or electrically conductive body, the processing portion uses the metal body to wirelessly transfer electromagnetic energy to the first and the second sensors. The first sensor and the second sensors are operable to synchronize the times that they detect the parameters of the structure. | 08-18-2011 |
20110202290 | MULTI-DIMENSION DETECTOR WITH HALF BRIDGE LOAD CELLS - A multi-dimension detector with half bridge load cells, which includes an analog to digital converter (ADC), a plurality of half bridge load cells, an analog multiplexer and a central processing unit (CPU). The CPU controls the analog multiplexer to form a plurality of full bridge load cells by selecting either two of the half bridge load cells and detect a plurality of measures corresponding to an object. The ADC converts analog signals corresponding to the plurality of measures into digital signals. The CPU determines all dimension values of the object according to the plurality of measures corresponding to the digital signals. | 08-18-2011 |
20110208445 | METHOD OF ANALYZING LOAD-SETTLEMENT CHARACTERISTICS OF TOP-BASE FOUNDATION - Disclosed herein is a method of analyzing load-settlement characteristics of a top-base foundation. The method includes the step of inputting properties of a material of a top base, a basic size of footing configuration, and a load of a structure, the step of inputting the kind of ground and a base ground thickness, the step of determining an influential depth and a load dispersion angle depending on the kind of ground, the step of inputting properties of the ground, the step of determining an immediate settlement amount of the ground, and the step of determining a total settlement amount. The method according to the present invention can precisely determine settlement taking into account footing configuration. Furthermore, the method calculates the settlement taking into account consolidation settlement when the ground is cohesive soil ground or top-cohesive-soil and bottom-sandy-soil ground. Thus, the settlement can be precisely determined. | 08-25-2011 |
20110208446 | Wireless Strain Sensors, Detection Methods, and Systems - A strain sensor comprises a transmitting element; a receiving element wirelessly coupled to the transmitting element; and a modulating element located on a rotating component, wherein the modulating element modulates the wireless coupling between the transmitting element and the receiving element, wherein the modulation of the wireless coupling is indicative of strain on the rotating component. A method of detecting strain in a rotating component of a rotary machine comprises wirelessly coupling a transmitting element and a receiving element; modulating the coupling with a modulating element located on the rotating component; and calculating the strain in the rotating component based on the modulation of the coupling. | 08-25-2011 |
20110213570 | Method and Apparatus for Sensing Drag of a Fishing Line - An electronic sensor employs a strain gauge controlled by a microprocessor on a circuit board. The processor operates software to measure electric impulses from the strain gauge and to convert them into digitally recognizable numbers. Software provides for calibration of the electronic sensor specific fishing rods. The software also controls an LCD read-out device to allow the user to preset a known drag resistance force in suitable units of measure on the fishing reel and to continually read out the amount of force pressure on the fishing line after hook-up so that a user can apply maximum pressure on a fish while fighting the fish without breaking the fishing line. | 09-01-2011 |
20110288791 | APPARATUS, CONTROLLER AND METHOD FOR ADAPTIVE CONTROL OF AN ELECTROMAGNETIC ACTUATOR - Provided are a structure testing apparatus, a controller for such an apparatus and a method for controlling a structure testing apparatus in which operation of a direct drive electromagnetic actuator is continuously auto-tuned during a test, so that the test load applied to a specimen during the test is the correct, desired load according to the current specimen parameters including stiffness. Forward and feedback control gains are repeatedly recalculated during the test in response to monitored specimen parameters. | 11-24-2011 |
20110313686 | METHOD FOR APPLYING EXTENSOMETRIC SENSORS IN RAILWAY TRACKS - The invention relates to a method for applying extensometric sensors in railway tracks, in combination with electronic equipment and a post-processing of the signals and data obtained to measure the stresses on railway tracks and the like, as well as to measure contact forces between the wheel of the vehicle or train and the actual rail on which it is travelling. According to the method, the following is performed: capturing micro-deformations in a known point of the track; analyzing these micro-deformations; identifying the element corresponding to the micro-deformation signal peaks coinciding with the passage of the train over one of the cross members of the track; analyzing the micro-deformation signal peaks previously identified; obtaining signals by means of sensors ( | 12-22-2011 |
20120010828 | DETERMINATION OF SUBGRADE MODULUS AND STIFFNESS OF PAVEMENT LAYERS FOR MEASUREMENT OF BEARING CAPACITY UNDER FAST MOVING WHEEL LOAD - The present invention directed to rolling weight deflectometers having sensors to measure pavement deflection, and to provide test data to determine the subgrade modulus and equivalent thickness of pavements. This information is then utilized to determine more than deflection and according to the present invention is utilized to determine critical strain parameters that can be applied to predict bearing capacity, rutting and roughness characteristics of pavements. This invention enhances the value of pavement testing while at the same time allowing for testing systems having fast moving wheel loads. The collected data can be used to determine vertical compressive strain and horizontal tensile strain, which can be more valuable for the prediction of remaining life time and recommendations for repair and maintenance. | 01-12-2012 |
20120016601 | METHOD AND SYSTEM FOR DETERMINING PROPERTIES OF AN ASPHALT MATERIAL - A method for determining properties of an asphalt material include measuring respective current deformations of a plurality of samples of the asphalt material, repeating the measuring step over a plurality of temperatures that change at a predetermined rate, calculating a plurality of measured total strain values as a function of the deformations and the temperatures, calculating respective creep strains, at different ones of the plurality of temperatures, based on the total strains as a function of applied stresses, calculating respective creep stiffnesses as a function of the temperatures, determining a combined creep curve based on the respective creep stiffnesses, deriving a theoretical creep curve, and fitting the theoretical creep curve with the combined creep curve to determine a master creep curve function and a time-temperature shift function. | 01-19-2012 |
20120022801 | METHOD AND SYSTEM FOR DISTINGUISHING POSITIONS OF TIRES IN A DUAL REAR TIRE VEHICLE - A method for identifying tire positions of a dual rear tire vehicle having front tires and a pair of dual rear tires. The dual rear tires include an inner rear tire and an outer rear tire. The method includes providing a set of tire monitoring modules attached to each of the tires, and a processing module operatively attached to the tire monitoring modules. Further, the method includes receiving tire information, including tire pressure signals and rotational direction, from the set of monitoring modules of each of the tires. The method then involves identifying the dual rear tires and the front tires, and the dual rear tires located on right side and left side of the vehicle based on the received tire information. The inner rear tire and the outer rear tire of each of the dual rear tires are also identified based on the received tire information. | 01-26-2012 |
20120029842 | TRIGGER CIRCUIT FOR LOW-POWER STRUCTURAL HEALTH MONITORING SYSTEM - A trigger circuit for use with a structural health monitoring system. To save power, a structural health monitoring system is programmed with a sleep mode and a wake, or operational, mode. In its operational mode, the structural health monitoring system can perform its usual tasks, e.g. monitoring a structure and determining its structural health. In sleep mode, many functions are suspended, so that the system requires less power. The trigger circuit wakes the system when the sensors of the structural health monitoring system emit a sufficiently large signal, i.e. when an event occurs. That is, when not in use, the system enters sleep mode, and when some event occurs (e.g., impact, or some other stresses that are of concern), the trigger circuit alerts the system, prompting it to shift from sleep mode to operational mode and to begin taking/analyzing data. | 02-02-2012 |
20120029843 | METHOD, SYSTEM, AND COMPUTER PROGRAM PRODUCT FOR SENSOR DATA COLLECTION IN A WIND TURBINE - Method, system, and computer program product for collecting sensor readings from a component of a wind turbine. The system includes a data collection system coupled in communication with a sensor. The data collection unit includes a processor configured to direct the sensor readings from the sensor to a buffer for temporary storage and to identify a triggering event by comparing the sensor readings received from the sensor with a reference value. In response to the identification of the triggering event, the sensor readings are transferred from the buffer to the mass storage device and stored in a non-volatile form by the mass storage device. | 02-02-2012 |
20120035865 | LOAD MEASURING APPARATUS, METHOD, AND PROGRAM - A load is based calibrate on data collected under wide observation conditions and promptly calibrate loads of a plurality of wind turbine blades. A load measuring apparatus is applied to a wind turbine in which a pitch angle of a wind turbine blade is variable. The apparatus includes a sensor for obtaining a distortion of the wind turbine blade; a load calculating unit having a function expressing a relation between the distortion of the wind turbine blade and a load on the wind turbine blade, for obtaining the load on the wind turbine blade by applying to the function the distortion based on measurement data of the sensor; and a calibration unit for calibrating the function based on the measurement data of the sensor obtained in a pitch angle range and a rotational speed range of the wind turbine blade in which a variation between maximum and minimum aerodynamic torques is equal to or less than a predetermined value. | 02-09-2012 |
20120078537 | TRANSMISSION SENSING AND MEASUREMENT SYSTEM - A transmission sensing and measurement system. The system provides real-time feedback of various transmission operating characteristics which enables immediate synchronized shift calibration in response to vehicle operating conditions. The system can be applied to various transmission components and positions, such as bearing, shafts, and differentials. The system is arranged in a transmission assembly. By way of a method for measuring operating characteristics of the transmission where data is collected by a sensor and transmitted, optimal operating characteristics of the transmission can be calculated. | 03-29-2012 |
20120089349 | Method for Measuring the Orientation and the Elastic Strain of Grains in Polycrystalline Materials - A method for measuring the orientation and deviatoric elastic strain of the crystal lattice of grains contained in a sample of polycrystalline material comprising a set of grains (G | 04-12-2012 |
20120095702 | SYSTEMS AND METHODS FOR DETECTING LANDING GEAR GROUND LOADS - There is provided a system for predicting loading of a landing gear including, a plurality sensors positioned proximate to the landing gear. The plurality of sensors measure strain applied to the landing gear, and each sensor yielding strain data. The system further includes a processor that receives the strain data from the plurality of sensors and predicts at least one ground load based on strain data. There is further provided a method for predicting loading of a landing gear. The method includes powering a plurality of sensors located proximate to a landing gear structure, interrogating the plurality of sensors via data acquisition circuitry to yield strain data, instructing the data acquisition circuitry as to a sampling rate and data resolution to be used for the interrogating, and, finally, processing the strain data to predict a ground load. | 04-19-2012 |
20120095703 | MONITORING SYSTEMS AND METHODS FOR AIRCRAFT LANDING GEAR - A system and method for monitoring loads applied to aircraft landing gear structure. The method includes the step of interrogating at least one sensor positioned proximate the landing gear structure by way of data acquisition circuitry to yield strain data. The method further includes the step of instructing the data acquisition circuitry with respect to a sampling rate and data resolution for interrogation. | 04-19-2012 |
20120123702 | System and Method for Simultaneously Determining Strain and Temperature Characteristics of an Object - A system for simultaneously determining strain and temperature characteristics of an object comprising: (i) at least one optical fiber having at least two Brillouin peaks; (ii) at least one connector securing the optical fiber to the object to be monitored; (iii) a laser positioned to provide laser light to said at least one optical fiber; (iv) a device measuring frequencies of said at least two Brillouin peaks, and determining frequency shifts of said at least two Brillouin peaks for said at least one optical fiber along the length of fiber; and (v) a system calculating strain and temperature characteristics along said fiber, based on the coefficients of strain and temperature as well as the measured Brillouin frequency shifts for said optical fiber along the length of said optical fiber. | 05-17-2012 |
20120143521 | Modeling an Interpretation of Real Time Compaction Modeling Data From Multi-Section Monitoring System - A method, apparatus and computer-readable medium for determining deformation of a plurality of coupled members. A distributed strain sensor string on a first member is coupled to a distributed strain sensor string on a second member. Signals are obtained from the sensor strings. A subset of strain data relating to sensor strain on the first member and the second member is created. A virtual sensor string is created having a plurality of virtual sensors placed on the first and second members including a joint therebetween. Strain data of sensors in the distributed stain sensor strings is mapped to sensors in the virtual sensor string. The deformation of the plurality of coupled members is determined using the strain data of the virtual sensors. | 06-07-2012 |
20120143522 | Integrated Solution for Interpretation and Visualization of RTCM and DTS Fiber Sensing Data - A method, apparatus and computer-readable medium for determining an effect of an event on a parameter of a member is disclosed. A plurality of strain measurements are obtained at a plurality of times, wherein each strain measurement corresponding to a sensor located at the member. A temperature correction is applied to the plurality of strain measurements obtained at each of the plurality of times. The parameter is obtained from the plurality of temperature-corrected strain measurements at each of the plurality of times, and the effect of the event on the parameter is determined from the time-correlated parameters. | 06-07-2012 |
20120143523 | Interpretation of Real Time Casing Image (RTCI) Data Into 3D Tubular Deformation Image - A system, method and computer-readable medium for providing an image of a deformation of a member is disclosed. Strain measurements are obtained at a plurality of sensors located at the member. Components of the obtained strain measurements corresponding to a bending deformation are obtained. From the obtained components, components are obtained that corresponding to at least one cross-sectional deformation of the member and a bending parameter is determined from the components corresponding to the bending deformation. A cross-sectional deformation parameter is determined from the components corresponding to the at least one of the cross-sectional deformations. The image of the deformation of the member is provided using the determined bending parameter and the determined cross-sectional deformation parameter. | 06-07-2012 |
20120143524 | Determination of Strain Components for Different Deformation Modes Using a Filter - A method, apparatus and computer-readable medium for determining a strain component for a deformation mode of a member is disclosed. A plurality of measurements is obtained, wherein each of the plurality of measurements relates to a strain at a location of the member. A deformation mode is selected and an adjustable filter is applied to the plurality of strain measurements to determine the strain component for the selected deformation mode. | 06-07-2012 |
20120143525 | Interpretation of Real Time Compaction Monitoring Data Into Tubular Deformation Parameters and 3D Geometry - A method, apparatus and computer-readable medium for determining a deformation strain distribution of a member corresponding to a selected deformation mode is disclosed. Strain measurements are obtained at a plurality of sensors, wherein each strain measurement is related to a strain at a location of the member. A component of the strain related to a selected deformation mode for the obtained strain measurements is determined and a principal strain component and a secondary strain component for each of the determined components of the strain is determined. The determined principal strain component and secondary strain component are mapped to a surface of the member to determine the deformation strain distribution. | 06-07-2012 |
20120143526 | DETECTION AND CHARACTERIZATION OF HEAD IMPACTS - Systems and methods are provided for determining an acceleration at a location of interest within one of a user's head and neck. At least one of linear acceleration data, angular acceleration data, angular velocity data, and orientation data is produced using at least one sensing device substantially rigidly attached to an ambient-accessible surface of the user's head. The location of interest is represented relative to a position of the at least one sensing device as a time-varying function. An acceleration at the location of interest is calculated as a function of the data produced at the sensing device and the time-varying function representing the location of interest. The calculated acceleration at the location of interest is provided to at least one of the user and an observer in a human-perceptible form. | 06-07-2012 |
20120143527 | LOCAL BUCKLING PERFORMANCE EVALUATING METHOD FOR STEEL PIPE, STEEL PIPE DESIGNING METHOD, STEEL PIPE MANUFACTURING METHOD, AND STEEL PIPE - A method for evaluating local buckling performance of a steel pipe includes obtaining a stress-strain relationship of a material having a yield plateau in the stress-strain relationship; determining the comparison of a starting strain of strain-hardening in the stress-strain relationship obtained and a critical strain of the steel pipe; and evaluating that the steel pipe has a possibility of being applied to a structure that requires plastic design when the critical strain is determined to be larger than the starting strain and evaluating that the steel pipe has no possibility of being applied to a structure that requires plastic design when the critical strain is determined to be not larger than the starting strain. | 06-07-2012 |
20120173167 | Pedal Torque Measurement - There is described a method for determining the torque applied to a pedal axle ( | 07-05-2012 |
20120185182 | TWO DIMENSIONAL BAR CODE HAVING INCREASED ACCURACY - A two-dimensional matrix code containing dark and light square data modules, and a finder pattern of two bars of alternating dark and light square data modules on the perimeter of the symbol for indicating both orientation and printing density of the symbol, wherein all of the data modules are the same dimension and data is encoded based on the absolute position of the dark modules within the matrix, and inner and outer bars are provided along adjacent sides of the matrix code symbol, each bar having a width equal to the square data modules. In one embodiment, the inner and outer bars are solid. In another embodiment, the inner solid is bar and the outer bar is an encoding bar. | 07-19-2012 |
20120245862 | METHOD FOR THE STRUCTURAL ANALYSIS OF PANELS CONSISTING OF AN ISOTROPIC MATERIAL AND STIFFENED BY TRIANGULAR POCKETS - The invention relates to a method for dimensioning, by an analytical method, of an essentially plane panel consisting of a homogenous and isotropic material, said panel consisting of a skin reinforced by a set of three parallel bundles of stiffeners built into the panel. The pockets determined on the skin by said groups of stiffeners are triangular, the stiffeners are blade shaped and the stiffened panel must comply with specifications for mechanical resistance to predetermined external loads, the angles between bundles of stiffeners being such that the triangular pockets have any kind of isosceles form. | 09-27-2012 |
20120253702 | INTERNAL RESIDUAL STRESS CALCULATING DEVICE, NON-TRANSITORY COMPUTER-READABLE MEDIUM, AND INTERNAL RESIDUAL STRESS CALCULATING METHOD - An internal residual stress calculating device includes a prediction unit that predicts a temporal variation in deformation which is received by a medium having an image formed thereon from a correcting device correcting a deformation, and a calculation unit that calculates an internal residual stress of the medium having passed through the correcting device on the basis of a relational expression including an elasticity term and a term related to a plastic deformation and the temporal variation in deformation predicted by the prediction unit. | 10-04-2012 |
20120259558 | AIR GAP MEASURING APPARATUS - Disclosed is an air gap measuring apparatus, for measuring width of an air gap formed between a rotator and a stator. An insertion section has a first flat plate section and a second flat plate section. Gap adjusting means drives the second flat plate section such that the second flat plate section moves away from the first flat plate section, until the first flat plate section and the second flat plate section abuts on the rotator and the stator. An operating section extends to outside of the insertion section, and operates the gap adjusting means. An elastic body has an end that follows the first flat plate section, and other end that follows the second flat plate section. A strain gage outputs electrical signals corresponding to the strain of the elastic body, the strain being formed due to the movement of the second flat plate section. | 10-11-2012 |
20120271566 | METHOD FOR THE PREDICTION OF FATIGUE LIFE FOR STRUCTURES - A method of determining the fatigue life of a structure includes the steps of:
| 10-25-2012 |
20120296577 | MAGNETOELASTIC FORCE SENSORS, TRANSDUCERS, METHODS, AND SYSTEMS FOR ASSESSING BENDING STRESS - A new type of magnetoelastic device for sensing force is described. It comprises of two elements: a circumferentially magnetized member comprised of magnetoelastically active material mounted as a beam and loaded by the force to be sensed, and a magnetic field sensor mounted at or near the member's surface, preferentially at or near a longitudinal location where the bending moment is maximum and at a circumferential location where the bending stress is zero. Flexural loading causes a variation of the circumferential magnetization with angular position. This variation is the source of free poles, the field from which is a measure of the applied force. Testing demonstrates that the field intensity is a linear analog of the experienced bending stress over a significant range of applied push and pull forces. | 11-22-2012 |
20130006543 | FRACTURE DETERMINATION METHOD, FRACTURE DETERMINATION APPARATUS, PROGRAM, AND COMPUTER READABLE RECORDING MEDIUM - A fracture determination method for determining a fracture of a metal structure includes, when a fracture determination target portion has returned from a plastic state to an elastic state, given that a stress when the portion returned to the elastic state is (x, y)=(σ | 01-03-2013 |
20130013224 | Strain Measuring Method, Strain Measuring Device and Program - A strain measuring device is provided which is not affected by a change in the intensity and irradiation direction of light received by a measurement target and which enables stable measurement. A computer functions as minute region extracting device for extracting respective surface height distributions of minute regions a and b containing points A and B in a predetermined region from an initial surface height distribution obtained by measuring the predetermined region ( | 01-10-2013 |
20130035878 | System and Method for a Surface Strain Gauge - A system and method for a surface strain gauge is described which has direct application to wind turbine structures and wind turbine blades and wind turbine struts. The invention is equally applicable to other airfoil structures such as aircraft wings and aircraft fuselages. The strain gauge comprises an array of carbon fibre material integrated with one or more microcontroller modules wherein the entire array may be incorporated into the surface of the structure to be monitored during manufacture of the structure. The array comprises separate sheets of carbon fibre reinforced epoxy which are linked together and which each comprise a separately addressable element such as a microcontroller wherein the microcontrollers are connected to a power supply and to a central bus which itself links to a central system controller. Differential measurements of the resistance of separate carbon fibre reinforced epoxy sheets may be determined in real time as well as the resistance between two or more sheets. In this way real time dynamic load monitoring can be performed and compared with original values determined at time of manufacture to provide data on fatigue of the structure with time before damage and failure occurs. | 02-07-2013 |
20130054156 | STRAIN MEASURING AND MONITORING DEVICE - The present disclosure provides a strain measuring and monitoring device with displacement sensors for measuring and monitoring the levels of strain and load forces experienced by metallic bars, such as reinforcing bars or rock bolts. The strain measuring and monitoring device includes an array of displacement sensors that directly measure the induced displacement or stretch of the metallic bar being measured over an extended base length. Upon dividing the measured displacement by this longer base-length, an average strain is determined. | 02-28-2013 |
20130080078 | SYSTEM AND METHOD FOR GAUGING SAFE TOWING PARAMETERS - A system for determining the tongue weight of a towed vehicle and other parameters includes a drawbar transducer in one embodiment and a receiver hitch transducer in another embodiment. Strain gauges are strategically located on the transducer and information regarding the towed vehicle are sent to a display. In one embodiment, a portable display unit has a radio frequency transceiver for receiving transmitted data from the transducer reflective of the towed vehicle tongue weight so that a user can view the tongue weight in practically real time. In this manner, the user can adjust the contents of the towed vehicle to achieve proper tongue weight without the necessity of going back and forth between the trailer and the transducer. A method is also disclosed for determining a safe towing condition based on the trailer tongue weight, trailer pulling force, acceleration during towing, and calculated trailer weight. | 03-28-2013 |
20130096849 | Force Sensitive Interface Device and Methods of Using Same - An interface device for measuring forces applied to the interface device. The interface device has a flexible contact surface suspended above a rigid substrate. The interface device has at least one sensor in communication with the contact surface. The interface device has processing circuitry for receiving signals from the sensors and substantially instantaneously producing an output signal corresponding to the location and force applied in multiple locations across the contact surface. | 04-18-2013 |
20130116938 | SYSTEM AND METHOD FOR DETERMINING STRESS OF A COMPONENT MADE OF MAGNETIZABLE MATERIAL - The present system determines a significant stress value (σ) of a component made of magnetizable material. The system has a generating stage for generating a magnetic field of varying amplitude (H); and also includes a pickup stage for acquiring a Barkhausen noise signal (MBN) alongside variations in the amplitude (H) of the magnetic field. The system is characterized by having a processing unit for calculating the reciprocal (1/MBNmax) of the maximum value (MBNmax) of the signal (MBN), alongside variations in the amplitude (H) of the magnetic field. The processing unit has a memory stage storing a linear relation between the reciprocal (1/MBNmax) of the maximum value and the significant stress value (σ). | 05-09-2013 |
20130158897 | SYSTEM AND METHOD FOR MONITORING AND CONTROLLING A TRANSFORMER - A system, a method and a computer program to monitor a plurality of transformer operating parameters, as well as to accurately control one or more of the transformer operating parameters. Calculate loss of life and give diagnosis for recovery and provide maintenance notification, monitor the operation of the LTC. | 06-20-2013 |
20130191044 | METHOD AND SYSTEM FOR PRESENTING STRESS DOMAIN - A method for presenting a stress domain includes analyzing, using a cost function, multiple stress ratio values and orientation values to obtain results, generating a stress domain diagram relating the stress ratio values and the orientation values to the results, and presenting the stress domain diagram. | 07-25-2013 |
20130211740 | WIRELESS TORQUE MEASUREMENT SYSTEM USING PROGRAMMABLE GAIN AMPLIFIER - A system includes a rotor, a rotor antenna attached to the rotor, a strain detection device attached to the rotor, a programmable gain amplifier attached to the rotor, and a control module attached to the rotor. The strain detection device is configured to generate signals that indicate an amount of strain in the rotor. The programmable gain amplifier is configured to amplify the signals generated by the strain detection device by a gain value. The gain value is programmable. The control module is configured to program the gain value of the programmable gain amplifier and transmit, via the rotor antenna, digital data that is derived from the amplified signals. | 08-15-2013 |
20130211741 | METHOD AND SYSTEM FOR DETERMINING THE POTENTIAL FRICTION BETWEEN A TYRE FOR VEHICLES AND A ROLLING SURFACE - A method and system for determining the potential friction between a tyre and a rolling surface wherein: the tyre is rotated on the rolling surface so as to subject a crown portion of the tyre to an acceleration radial component; data are obtained which are representative of the acceleration radial component to which the crown portion is subjected during at least one tyre revolution; starting from the data, data are selected which are representative of at least one transition region of the acceleration radial component; the selected data are processed so as to obtain information correlated with the steepness of transition of the at least one transition region; and the potential friction is estimated on the basis of the information correlated with the steepness of transition. | 08-15-2013 |
20130253853 | STRESS FACTOR DRIVEN MAINTENANCE AND SCHEDULING - In one aspect, embodiments of a method of using one or more stress factors to determine whether or when to perform a maintenance activity are described. One embodiment of the method comprises identifying one or more maintenance activities for a system; associating one or more stress factors to each of the identified one or more maintenance activities for the system; determining a value for each of the one or more associated one or more stress factors; and determining, using a computing device, whether to schedule one of the one or more maintenance activities for the system based on the determined value of each of the one or more stress factors associated with the one of the one or more maintenance activities. | 09-26-2013 |
20130268215 | System and Method for Prediction of Snap-Through Buckling of Formed Steel Sheet Panels - A simplified tool is provided for simultaneous prediction of dent resistance and snap-through buckling resistance of roof panels including the effect of roof bow placement, curvatures of the roof panel, thickness of the roof, and steel grade. In one embodiment, a method of predicting snap-through buckling resistance of a sheet metal panel to an applied load under localized loading conditions is provided, wherein the sheet panel has certain defined geometries. The method includes the steps of: identifying first and second principal radii of curvature of the panel; identifying a thickness of the panel; identifying the distance of a portion of the panel between structural supports; creating a mathematical function to determine load deflection behavior for snap-through buckling; and determining the likelihood of the panel to display snap-through buckling characteristics under various localized applied loads by inputting the parameters. | 10-10-2013 |
20130275058 | APPARATUS AND METHOD FOR A PRESSURE SENSITIVE DEVICE INTERFACE - A pressure sensitive device interface including a display screen, a framing structure that receives a force applied to the portable electronic device and exhibits strain within the framing structure, a strain gauge that identifies the strain within the framing structure, and a processor coupled to the display screen and the strain gauge and configured to measure the strain identified by the strain gauge and control the user interface according to the measurement of the strain. Among aspects, the framing structure may include a first pair of parallel elements that form opposing elongated outer edges of the portable electronic device, and a second pair of parallel elements that extend perpendicularly between the first pair of parallel elements. Among additional aspects, the processor may be further configured to identify a plurality of gestures with reference to strain metrics. | 10-17-2013 |
20130275059 | HYBRID VIRTUAL LOAD MONITORING SYSTEM AND METHOD - Virtual sensors can be used to monitor the loads on the system in determining damage accumulation, remaining useful life or retirement time of the components. A virtual sensor is a mathematical construct to infer a desired system measurement (e.g. a structural load) from readily available system state parameters (e.g. speed, weight, load factors, control settings, etc.). The accuracy of the virtual sensor depends upon the mapping between the desired measurement and the state parameters. A hybrid load monitoring system and method includes one or more direct or physical sensor measurements in addition to the plurality of virtual sensors. Signals from the physical sensors are included as an input (as opposed to an output) to the mapping between system state parameters and the various target sensor feature amplitudes. | 10-17-2013 |
20140019071 | METHOD FOR PRESS FORMING ANALYSIS - A method for press forming analysis includes (1) performing a coordinate transformation to calculate a distribution of stress (a) before a release from the press die in a local coordinate system; (2) performing a springback analysis which includes (i) calculating a distribution of residual stress after the release and performing the coordinate transformation to calculate a distribution of residual stress (b) in the local coordinate system, and (ii) calculating shape data (d) after the release; (3) calculating a difference (a-b) as SB effective stress, performing a coordinate transformation to calculate a distribution of SB effective stress in a global coordinate system, changing or removing the SB effective stress in an analysis target region and performing the springback analysis to calculate a shape data (c) after the release; and (4) calculating a difference (c-d) to determine a degree of influence of the analysis target region. | 01-16-2014 |
20140100798 | TURBINE BLADE FATIGUE LIFE ANALYSIS USING NON-CONTACT MEASUREMENT AND DYNAMICAL RESPONSE RECONSTRUCTION TECHNIQUES - A method dynamically reconstructing a stress and strain field of a turbine blade includes providing a set of response measurements from at least one location on a turbine blade, band-pass filtering the set of response measurements based on an upper frequency limit and a lower frequency limit, determining an upper envelope and a lower envelope of the set of response measurements from local minima and local maxima of the set of response measurements, calculating a candidate intrinsic mode function (IMF) from the upper envelope and the lower envelope of the set of response measurements, providing an N×N mode shape matrix for the turbine blade, where N is the number of degrees of freedom of the turbine blade, when the candidate IMF is an actual IMF, and calculating a response for another location on the turbine blade from the actual IMF and mode shapes in the mode shape matrix. | 04-10-2014 |
20140107949 | MECHANICAL MEASUREMENT OF STATE OF HEALTH AND STATE OF CHARGE FOR INTERCALATION BATTERIES - A battery management system for use with a battery under test is disclosed. The system includes a container configured to hold the battery. The system also includes a stress/strain sensor. The container is configured to hold the battery in fixed relationship with respect to the stress/strain sensor. A processor is coupled to the stress/strain sensor, the processor being configured to measure the stress/strain on the battery and determine the state of health (SOH) of the battery based on the measured stress/strain and previously stored SOH relationship data for the battery. The processor may be configured to determine a state of charge (SOC) of the battery based on the measured stress/strain, the SOH of the battery and previously stored SOC relationship data for the battery. | 04-17-2014 |
20140180608 | Electronic Device for Measuring the Relative Force Acting Upon a Sail - The sail force gauge utilizes an electronic system to measure the vectored force of the mainsheet or jib sheet. By gaining the vectored force of the sheet, a relative vectored force upon the sail can be acquired thru simple trigonometric equations. To obtain the vectored force measurement, a multi-axis load cell will measure the force in the lateral and axial directions. These forces can be used to calculate the vectored force of the mainsheet. By knowing the dimensions of the boom length, the sheet block positions, and the vector angle, the resultant angle of the boom can be calculated as well as the perpendicular sail force acting upon the boom. From these calculations, the relative axial force acting upon the boat can be calculated. | 06-26-2014 |
20140180609 | METHOD OF ESTABLISHING THE DEFLECTION AND/OR THE STIFFNESS OF A SUPPORTING STRUCTURE - A method for establishing the deflection and/or the stiffness of a supporting structure which is subjected to a load. The method includes the steps of moving a measurement vehicle along the supporting structure, the vehicle having a loaded axle, a first measuring system being a first versine system and a second measuring system being one of an inertia based system and a second versine system. At a predetermined sampling rate, two sets of levels are measured using the two measuring systems. The two sets of levels are converted or transformed such that they relate to the same reference system and, thereafter, for each pair of sampled levels, the difference between the two levels is calculated such that the contribution to the measurements originating from unloaded irregularities in the supporting structure is eliminated, whereafter the deflection and/or the stiffness of the supporting structure is established from the calculated difference. | 06-26-2014 |
20140200835 | Pedaling Torque Sensor Device for Each Cyclist's Leg and Power Meter Apparatus - Pedaling torque sensor device for bicycles comprising a crank arm ( | 07-17-2014 |
20140278153 | TENSIONER LOAD MEASUREMENT SYSTEM - A load and stress of a tensioner may be determined from the change in the strain of the tensioner. The strain of the tensioner may be detected by an optical device having a Fiber Bragg Grating (FBG) that is attached to the tensioner. An electrical signal may be generated in response to the detected change in the mechanical strain of the tensioner by processing the light reflected from an optical fiber coupled to the optical device. The electrical signal may be processed to calculate a load on the tensioner. The calculated load may be stored and analyzed, along with previously-stored values for the load, to determine the condition of the tensioner system, and whether the tensioner system requires maintenance. | 09-18-2014 |
20140316719 | STRESS DETECTION IN RAIL - Methods and apparatus, including computer program products, are provided for determining rail stress. The method may include generating at least one ultrasonic guided wave to enable the at least one ultrasonic guided wave to propagate through a rail; detecting at least one of a fundamental frequency component of the at least one ultrasonic guided wave, one or more harmonics of the at least one ultrasonic guided wave, and/or a mixing component of the at least one ultrasonic guided wave; and determining a stress of the rail based on at least a nonlinearity parameter determined from the detected at least one of the fundamental frequency component, the one or more harmonics, and the mixing component. Related apparatus, systems, methods, and articles are also described. | 10-23-2014 |
20140379282 | METHOD AND APPARATUS FOR MEASURING BOWING OF SINGLE-CRYSTAL SUBSTRATE - At least two values of an X-ray irradiation width are set for a single specimen. A rocking curve is measured for each of the X-ray irradiation widths. A rocking curve width value is determined for each of the rocking curves. The values of the X-ray irradiation width and the values of the rocking curve width are plotted on a planar coordinate system having a vertical axis representing the rocking curve width value and a horizontal axis representing the X-ray irradiation width value, and a rocking curve width shift line is determined based on the plotted points. A gradient of the rocking curve width shift line is determined. A curvature radius of the specimen is determined based on the gradient. The amount of bowing of a single-crystal substrate under measurement can be measured without a need to move the single-crystal substrate for reliable measurement with a small amount of error. | 12-25-2014 |
20150025815 | METHOD FOR MEASURING THE POISSON'S RATIO AND THE RESIDUAL STRESS OF A MATERIAL - The subject matter of the present invention is a method for measuring the Poisson's ratio and the residual stress of any material, that is, a metal, ceramic, polymeric, crystalline or amorphous material, in the form of a bulk material or surface coating. | 01-22-2015 |
20150039247 | PRESS-FORMING ANALYSIS METHOD - A press-forming analysis method includes a step of analyzing press forming including setting an initial temperature distribution to a heated press-forming metallic sheet, and acquiring shape information, a temperature distribution, a stress distribution, and a strain distribution before mold release, in which a temperature analysis and a structural analysis are coupled; a step of analyzing springback including conducting a springback analysis based on the shape information, the temperature distribution, the stress distribution, and the acquired strain distribution, and acquiring shape information, a temperature distribution, a stress distribution, and a strain distribution after springback; and a step of analyzing cooling stress including restraining particular nodes based on the shape information, the temperature distribution, the stress distribution, and the acquired strain distribution, and analyzing stress distributions during cooling and after the cooling by coupling a temperature analysis and a structural analysis. | 02-05-2015 |
20150039248 | METHOD FOR DETERMINING A PARAMETER RELEVANT FOR CAUSING DAMAGE TO A STRUCTURE - A method for determining a parameter relevant for the damage to a structure, such as machines, machine components and individual assemblies that are subject to vibration stresses is disclosed. A method for active or passive vibration damping that makes use of this method, and a structure having a device configured to perform the above methods is also disclosed. | 02-05-2015 |
20150066393 | PRISM-COUPLING SYSTEMS AND METHODS FOR CHARACTERIZING CURVED PARTS - Prism coupling systems and methods for characterizing curved parts are disclosed. A coupling surface of a coupling prism is interfaced to the curved outer surface of the curved part to define a coupling interface. Measurement light is directed through the coupling prism and to the interface, wherein the measurement light has a width of 3 mm or less. TE and TM mode spectra reflected from the interface are digitally captured. These mode spectra are processed to determine at least one characteristic of the curved part, such as the stress profile, compressive stress, depth of layer, refractive index profile and birefringence. | 03-05-2015 |
20150073730 | MECHANICAL STRAIN GAUGE SIMULATION - A method for the computerized simulation of mechanical deformation is provided. The method makes it possible to define a strain gauge in a model of a mechanical structure in order to calculate the deformation at said gauge. The method makes it possible to simulate at will the measurement result of a strain gauge in a mechanical structure model. | 03-12-2015 |
20150142342 | Method and Device for Sensing Isotropic Stress and Providing a Compensation for the Piezo-Hall Effect - A method determines isotropic stress by means of a Hall element which includes a plate-shaped area made of a doped semiconductor material and comprises four contacts contacting the plate-shaped area and forming corners of a quadrangle, two neighboring corners of the quadrangle defining an edge thereof. At least one van der Pauw transresistance value in at least one van der Pauw measurement set-up of the Hall element is determined, wherein the four contacts of the Hall element form contact pairs, a contact pair comprising two contacts defining neighbouring corners of the quadrangle. One contact pair supplies a current and the other contact pair measures a voltage. A relationship between the supplied current and the measured voltage defines the Van der Pauw transresistance value. The method comprises determining a stress signal which depends on the at least one Van der Pauw transresistance value and determining isotropic stress. | 05-21-2015 |
20150294043 | METHOD FOR SPECIFYING STRETCH FLANGE LIMIT STRAIN AND METHOD FOR DETERMINING FEASIBILITY OF PRESS FORMING - A method for specifying stretch flange limit strain includes specifying stretch flange limit strain so as to satisfy a relation in the following formula by using: strain gradient in an inward direction directed from an end portion of a metal sheet at a time a press load is applied; and strain gradient in a sheet thickness direction of the metal sheet intersecting the loading direction: | 10-15-2015 |
20150316426 | Method for Measuring a Moving Vehicle - A method for measuring a vehicle moving on a roadway, in particular a bridge, by means of at least one sensor measuring the deformation under load of the roadway includes recording the time curve of the sensor-measured value while the vehicle moves past the sensor; repeating a minimization, in which a measure of the deviation from the recorded curve by a parametrized reference function comprising a sum of a number of rational functions is minimized by adapting the parameters thereof, wherein a different number is used in every repetition and, in fact, as often as necessary until the deviation measure falls below a limit value, and then selecting the reference function associated with this deviation measure as the selected reference function; and determining the number of rational functions of the selected reference function as the number of axles of the vehicle. | 11-05-2015 |
20150323399 | SOLAR BATTERY WIRELESS LOAD CELL - A load cell for transmitting load data of a polished rod in a rod pump system includes an outer shell having a u-shaped structure with two protrusions, the u-shaped structure configured to receive the polished rod, and the outer shell configured to be positioned between a rod clamp and a clamping bar of the rod pump system. Internal to the outer shell is a load sensor, a load signal processor, a modulator, a battery, and a charger, whereby the load cell measures a load on the polished rod and wirelessly transmits load signal data via a wireless transmitter internal to the outer shell but with an antenna that protrudes from the outer shell. Also internal to the outer shell is a battery which is charged by an external solar panel via the charger. The battery, charger, and solar panel provide power to the load cell. | 11-12-2015 |
20150356218 | Method and Apparatus for Shape-Based Energy Analysis of Solids - A method of evaluating response of a physical structure to external stimulus includes defining a mesh of finite elements, each defined by edges, for a model of the physical structure. The method includes identifying a governing differential equation and associated complementary functions, which are each associated with a scalar multiplier. The method includes generating an energy optimization model that minimizes a difference between internal and external energies of the finite elements. The internal energy is based on strain energy in a volume defined by the edges of the finite element and resulting from deformations by the complementary functions. The external energy of each finite element is based on external work done by the external stimulus acting on the finite element as deformed by the complementary functions. The method includes solving the energy optimization model for the scalar multipliers and calculating a resulting parameter of interest of the physical structure. | 12-10-2015 |
20160103028 | METHOD AND DATA PROCESSING DEVICE FOR DETECTING A LOAD DISTRIBUTION IN A ROLLER BEARING - A method for detecting a load distribution in a roller bearing having at least one row of rollers and a strain sensor attached to a first ring, wherein the first ring is configured to rotate relative to a second ring. The method comprises steps of: (a) detecting peak heights and peak positions in roller load induced strain signals obtained from the strain sensor, and (b) calculating a load acting on at least one angle range of the second ring using peak heights of a plurality of peak positions falling in the angle range. | 04-14-2016 |
20160121668 | VEHICLE LOADING CONDITION DETECTION SYSTEM AND METHOD - A system and method estimating a vehicle tire load identifies a change in vehicle loading condition by measuring vibration resonant frequency peaks (bounce mode and/or pitch mode) of the unsprung mass. Signals required include the chassis vertical acceleration and/or chassis pitch rate obtained from commercially available sensors mounted to the vehicle. An observer model receives the inertial signal(s) and generates a dynamic load estimation based upon observed frequency change in the sprung mass natural frequency. | 05-05-2016 |
20160129915 | Identifying Forces in a Interface Between a Body and a Suspension of a Vehicle - Forces in a vehicle interface between the suspension and a body are identified. Rather than using many or all strain gauges, some more easily and rapidly installed acceleration sensors are instead used to measure local deformation. To remove or reduce the effects of rigid-body motion captured by accelerometers, an inertial measurement unit is also used. The forces are estimated from a behavior model accounting for both rigid and flexible motions. | 05-12-2016 |
20160161249 | METHOD AND DEVICE FOR MEASURING DISPLACEMENT DISTRIBUTION OF AN OBJECT USING REPEATED PATTERN, AND PROGRAM FOR THE SAME - In the present invention, conventional problems that the scheme is not suitable for nano/micro materials or large structures, and that if the scheme is applied to a regular pattern with two or more cycles of arbitrary repetition, a large error is generated are solved by using a higher order frequency of moire fringes generated using an arbitrary regular pattern having one-dimensional or two-dimensional repetition artificially produced on a surface of an object or previously present on the surface of the object, or phase information in a plurality of frequency components, and improvement of measurement precision and a dramatic increase in a limit of a measurement scale are achieved. | 06-09-2016 |