Inventors list

Assignees list

Classification tree browser

Top 100 Inventors

Top 100 Assignees


Resonance, frequency, or amplitude study

Subclass of:

073 - Measuring and testing

073570000 - VIBRATION

Patent class list (only not empty are listed)

Deeper subclasses:

Class / Patent application numberDescriptionNumber of patent applications / Date published
073580000 Including weight determination 5
20100095774MASS MEASURING DEVICE AND CANTILEVER - Minute masses of a plurality of measuring objects are measured at a time.04-22-2010
20090165560DUAL MODE MEASUREMENT SYSTEM WITH QUARTZ CRYSTAL MICROBALANCE - A dual mode measurement system with quartz crystal microbalance (QCM) is provided, which includes a quartz sensing component, a first measurement circuit, a second measurement circuit and a switch unit. When the first measurement circuit is selected through the switch unit, the first measurement circuit and the quartz sensing component form an oscillation circuit and output a resonance signal. When the second measurement circuit is selected through the switch unit, the second measurement circuit outputs a frequency scanning signal to scan the quartz sensing component, so as to output an impedance sensing signal.07-02-2009
20090199639DETECTION SENSOR - It is an object of the present invention to provide a technique that can realize improvement of sensitivity of a vibrator. A platform 08-13-2009
20090049913METHOD OF BEAT TUNING IN A SLIGHTLY ASYMMETRIC RING-TYPE STRUCTURE - The present disclosure relates to a method of beat tuning in a slightly asymmetric ring-type structure, and can be effectively used to control the beat property of a structure such as a bell, which can be modeled to a slightly asymmetric ring.02-26-2009
20120144918LONGITUDINAL RESONATING MODE INERTIAL MASS SENSING SYSTEMS - The subject invention provides improved means to measure mass collected on a sample collection surface in real time. A resonant structure is used as the “scale” to determine the mass in real time. The invention employs a membrane, or collection substrate, on the end of a resonant structure resonating in the longitudinal direction. A structure resonating in the longitudinal mode offers a considerably higher resonant frequency than the same structure in the bending mode. The higher the resonant frequency, the more resolution in the frequency of oscillation is available to determine the mass of the collection surface or membrane. The present invention implements this attribute in connection with such a structure.06-14-2012
073583000 Of aircraft or related structural element 4
20110030476LASER ULTRASONIC MULTI-COMPONENT IMAGING - Techniques for ultrasonic determination of the interfacial relationship of multi-component systems are discussed. In implementations, a laser energy source may be used to excite a multi-component system including a first component and a second component at least in partial contact with the first component. Vibrations resulting from the excitation may be detected for correlation with a resonance pattern indicating if discontinuity exists at the interface of the first and second components.02-10-2011
20100011861DEVICE FOR NON DESTRUCTIVE TESTING OF A COMPONENT BY ANALYZING RADIATION DISSIPATION - A device for non-destructive testing of a component by analyzing radiation dissipation when the component is stressed by mechanical stresses. The device includes measuring means for determining a surface radiation field of the component. The measuring means are integrated in a flexible housing for covering a region of the surface of the component to be tested. The device enables an initial crack upon stress concentration on a surface of the component and the presence of a crack upon propagation of the crack to be detected. The disclosed embodiments are useful for non-destructive testing of aircraft components, but may be used in all industrial sectors where testing the integrity of components is important, such as the automotive, railway, marine and nuclear industries.01-21-2010
20110146406METHODS AND APPARATUS FOR VIBRATION TESTING USING MULTIPLE SINE SWEEP EXCITATION - A multi-sine vibration testing method includes coupling a vibratory excitation source and a sensor to a test structure, then providing a reference signal to the excitation source, wherein the reference signal comprises a first sinusoidal waveform having a first frequency and a second sinusoidal waveform having a second frequency different from the first frequency. The first frequency and the second frequency each sweep between a corresponding start value and a corresponding end value, and the frequency response is measured from each of the sensors while providing the reference signal.06-23-2011
20110219878METHOD AND APPARATUS FOR MEASURING THE STRUCTURAL INTEGRITY OF A SAFE-LIFE AIRCRAFT COMPONENT - The structural integrity of a safe-life aircraft component on an aircraft is measured and assessed by a processing unit. The component includes a load-bearing metal element that is free from cracks. In the method, acoustic emissions generated in the metal element are converted into electronic signals. The acoustic emissions converted include relevant acoustic emissions resulting from changes in the structure of the element that make the element more susceptible to the formation of cracks. The electronic signals are set to a processing unit. The processing unit processes over time the signals in conjunction with stored reference data that allows a measure of the structural integrity to be made. Information providing a measure of the structural integrity of the aircraft component is outputted. Thus, deterioration of the structure of the component can be detected and monitored before a crack occurs.09-15-2011
073582000 Including structural bond evaluation 4
20130213137METHOD AND APPARATUS FOR DETECTING CRACKS AND DELAMINATION IN COMPOSITE MATERIALS - A method is disclosed for testing for delamination of a first composite component from a second composite component a composite material. The method comprises coupling a broad-band actuator to the composite material and connecting sweeping frequencies to the broad-band actuator for vibrating the composite material. An acoustic sensor is coupled to the composite material for measuring a resonant frequency curve of the vibrating composite material. The measured resonant frequency curve of the vibrating composite material is compared with a reference resonant frequency curve. A delaminated composite material produces a change in the measured resonant frequency curve relative to the reference resonant frequency curve. The method is suitable for detecting delamination in fuel cells as well as ceramic body armor.08-22-2013
20120036933METHOD FOR THE NON-DESTRUCTIVE AND CONTACTLESS CHARACTERIZATION OF A SUBSTANTIALLY SPHERICAL MULTILAYERED STRUCTURE AND RELATED DEVICE - A method is provided for the non-destructive and contactless characterization of a multilayered structure having a substantially spherical shape and including at least two layers, separated by interfaces. The method includes using a laser for locally heating the structure in a thermoelastic state so that the structure is vibrated in a non-destructive manner, measuring the resonance frequencies of the vibration modes of the structure and deriving at least one characteristic concerning the integrity or the shape or the mechanical behavior of the structure from the resonance frequencies of the structure.02-16-2012
20130139596Sensing System and Method - A sensing system which comprises a material (06-06-2013
20110314915DAMAGE DETECTION USING LASER VIBROMETRY - Methods and apparatus for exciting a structure and determining its structural integrity. In particular, methods of nonlinear analysis are used to compare first and second response datasets, each dataset resulting from a different excitation amplitude that the other dataset.12-29-2011
073581000 Including axial force determination 1
20090217760SENSING APPARATUS - A sensing apparatus utilizing film bulk acoustic resonators (FBARs). The film bulk acoustic resonator has a bulk acoustic wave velocity (Vb) and a corresponding resonant frequency (f). When the FBAR is subjected to a force such as acceleration, g-force or an air pressure, the bulk acoustic wave velocity changes to obtain a frequency downshift (Δf) in response to deformation caused by the force. A magnitude of the force is then obtained by calculating the frequency downshift (Δf).09-03-2009
Entries
DocumentTitleDate
20110174077METHOD FOR THE IN-LINE MEASUREMENT OF THE SETTING, CONTRACTION AND WALL RELEASE BEHAVIOUR OF CONFECTIONERY/CHOCOLATE PRODUCTS WHICH HAVE BEEN POURED INTO MOULDS DURING PRODUCTION, AND APPARATUS FOR CARRYING OUT THIS METHOD - The invention relates to a method and a device for detecting the solidification behavior of pourable and solidifying masses and/or masses that are to be solidified, in particular of chocolate-type masses, as well as their separation behavior from their delimiting walls that are in contact with these masses, specifically molds. Solutions are offered regarding how to achieve the optimized point in time for demolding and for achieving optimized product surface quality taking into account process orders of magnitude such as cooling temperature, cooling speed and conveyor belt speed.07-21-2011
20090260438INDUSTRIAL PROCESS DEVICE UTILIZING PIEZOELECTRIC TRANSDUCER - A process device for coupling to an industrial process for use in monitoring or controlling the process includes a device housing configured to physically couple to the industrial process. A process variable sensor is configured to measure a process variable and measurement circuitry coupled to the process variable sensor provides an output related to the sensed process variable. A piezoelectric transducer provides an electrical output related to pressure pulsations in the industrial process. Electrical circuitry in the housing includes an input configured to receive the electrical output from the piezoelectric sensor.10-22-2009
20100154544INTEGRATED TORSIONAL-MICROBALANCE DEVICE IN MEMS TECHNOLOGY AND FABRICATION PROCESS THEREOF - A MEMS microbalance that includes a substrate made of semiconductor material with a cavity, and a resonator, which is suspended above the cavity of the substrate and is formed by a mobile body, by at least one first arm connected between the substrate and the mobile body, which has a first thickness and which enables oscillations of the mobile body with respect to the substrate, by an actuation transducer connected to the mobile body for generating the oscillations at a resonance frequency, and by a detection transducer for detecting a variation of the resonance frequency, wherein the mobile body possesses at least one thin portion having a second thickness smaller than the first thickness of the first arm.06-24-2010
20100083762FABRICATION AND USE OF SUBMICRON WIDE SUSPENDED STRUCTURES - A method of fabrication of submicron wide suspended structures. The method includes depositing a layer of glassy material under tensile stress on crystalline silicon, patterning the layer of glassy material with a masking layer having a pattern, the masking layer protecting the layer of glassy material along the pattern, selectively removing the layer of glassy material in areas of the layer of glassy material not protected by the masking layer; and anisotropically etching the crystalline silicon to create at least a pit extending into the crystalline silicon and at least partially under the layer of glassy material to release a suspended structure comprising glassy material.04-08-2010
20080257046Built-in swept-sine testing for a computer system to assure vibrational integrity - Embodiments of the present invention provide a system that performs vibration testing in a computer system. The system starts by generating a vibration at a predetermined frequency in a computer system. The system then determines if the computer system has a resonance at the predetermined frequency. If so, the system adjusts an operating parameter of at least one computer system component to prevent the computer system component from vibrating at or near a resonance frequency.10-23-2008
20120174671METHOD FOR DETERMINING AND/OR MONITORING AT LEAST ONE PHYSICAL, PROCESS VARIABLE - A method for determining and/or monitoring at least one physical, process variable of a medium with an oscillatable unit, wherein a transmitting/receiving unit excites the oscillatable unit by means of transmission signals to execute oscillations. The oscillations of the oscillatable unit are received in the form of received signals, and the process variable is determined and/or monitored based on the frequency and/or the amplitude of the received signal and/or phase shift between the transmission and the received signals. The time behavior of the amplitude of the received signal is examined and evaluated as a function of a time variation of the exciting of the oscillatable unit, and is determined therefrom whether accretion has formed on the oscillatable unit.07-12-2012
20130081467INTEGRATED TORSIONAL-MICROBALANCE DEVICE IN MEMS TECHNOLOGY AND FABRICATION PROCESS THEREOF - A MEMS microbalance that includes a substrate made of semiconductor material with a cavity, and a resonator, which is suspended above the cavity of the substrate and is formed by a mobile body, by at least one first arm connected between the substrate and the mobile body, which has a first thickness and which enables oscillations of the mobile body with respect to the substrate, by an actuation transducer connected to the mobile body for generating the oscillations at a resonance frequency, and by a detection transducer for detecting a variation of the resonance frequency, wherein the mobile body possesses at least one thin portion having a second thickness smaller than the first thickness of the first arm.04-04-2013
20130074600PART EVALUATION SYSTEM/METHOD USING BOTH RESONANCE AND SURFACE VIBRATION DATA03-28-2013
20100043554APPARATUS FOR ASCERTAINING AND/OR MONITORING A PROCESS VARIABLE OF A MEDIUM - An apparatus including: a mechanically oscillatable unit; an exciting/receiving unit; and an electronics unit having an input amplifier and an output amplifier. The amplification factors of the output amplifier and the input amplifier are tunable. The control unit tunes the amplification factor of the output amplifier as a function of damping of the mechanically oscillatable unit in such a manner that the amplitude of the electrical, input signal lies within an amplitude band and that the amplification factor of the output amplifier decreases in the case of lessened damping by the medium and increases in the case of greater damping by the medium, and the control unit tunes the amplification factor of the output amplifier and the amplification factor of the input amplifier in such a manner that the total amplification factor of the electronics unit equals a predeterminable value.02-25-2010
20090158848Methods for Using Resonant Acoustic and/or Resonant Acousto-EM Energy to Detect and/or Effect Structures - The present invention makes use of resonant acoustic and/or acousto-EM energy applied to inorganic or biologic structures for the detection and/or identification, and for augmentation and/or disruption of function within the biologic structure. In particular, the invention provides a method of generating resonant acoustic and/or acousto-EM energy in biologic structures such as virus, bacteria, fungi, worms and tumors for the detection and disruption of these structures. Moreover, the invention provides a method of augmenting functions of biologic structures such as bone through the generation of resonant acoustic and/or acousto-EM energy in the structure. Systems are also provided for the generation and detection of resonant acoustic and/or resonant acousto-EM energy.06-25-2009
20120180568External force detecting device and external force detecting sensor - A device is provided for a detecting external force applied to piezoelectric piece. A crystal piece is cantilever-supported in a container. Excitation electrodes are formed on an upper face and lower face, respectively. A movable electrode, connected via a lead-out electrode to the excitation electrode, is formed on the lower face side at a front end of the crystal piece. A fixed electrode is provided on a bottom portion of the container to face this movable electrode. The excitation electrode on the upper face side and the fixed electrode are connected to an oscillation circuit. When the crystal piece bends in response to an applied external force, capacitance between the movable electrode and fixed electrode, changes. This capacitance change results in a corresponding change in oscillation frequency of the crystal piece.07-19-2012
20120180567External force detecting method and external force detecting device - A technique for detecting external force applied to a piezoelectric plate is provided. A crystal plate is cantilever-supported in a container. Excitation electrodes are formed on an upper face and lower face, respectively, of the crystal plate. A movable electrode is formed on the lower face side. A fixed electrode is provided on a bottom portion of the container facing the movable electrode. The excitation electrode on the upper face side and the fixed electrode are connected to an oscillation circuit. When the crystal plate bends by external force applied, capacitance between. A direction of the movable electrode along a length direction of the crystal plate is set to 30° to 60°, relative to a face orthogonal to an intended direction of the external force. The movable electrode and fixed electrode changes, and this capacitance change and a deformation of the crystal circuit.07-19-2012
20130055815SIGNAL PROCESSING CIRCUIT, PHYSICAL QUANTITY DETECTION APPARATUS, ANGULAR VELOCITY DETECTION APPARATUS, INTEGRATED CIRCUIT DEVICE, AND ELECTRONIC INSTRUMENT - A signal processing circuit includes an I/V conversion circuit (current/voltage conversion section) that converts an oscillation current of a vibrator into a voltage, an RC filter (phase shift section) that shifts a phase of the output signal of the I/V conversion circuit, a full-wave rectifier (part of a drive amplitude control section) that binarizes a signal that has been shifted in phase to generate a switch control signal, a comparator (reference signal generation section) that generates a reference signal for synchronous detection based on the output signal of the I/V conversion circuit, and an EXOR circuit (clock signal generation section) that generates a clock signal for a switched capacitor filter (SCF) that has a frequency twice a frequency of a drive signal based on a phase difference between the reference signal and the switch control signal.03-07-2013
20130068024DEVICE AND METHOD FOR MONITORING ROTOR BLADES OF A TURBINE - A device and a method for monitoring the operational state of rotor blades of a turbine from a position facing the blade tip of a passing rotor blade: A wavesource generates an electromagnetic wave and a wave guide directs the wave towards the blade tip. The waveguide is included in a resonator defining at least one discrete resonance frequency of the wave on the waveguide. An aperture at its front end emits an energy fraction of the wave toward the blade tip. The frequency of the wave is adjusted to the resonance frequency of the resonator at the momentary operation conditions, and a measuring unit compares at least one measurement parameter of the wave directed towards the blade tip with the corresponding measurement parameter of the wave reflected from the blade tip.03-21-2013
20130068025DETECTING MASS ON A MEMS BIOOSCILLATING RESONATOR ARRAY - A system configured to determine the mass of an object. The system generates a first output signal by transmitting an excitation signal through an oscillating resonator array. The oscillating resonator array includes a first oscillating resonator, a second oscillating resonator; and an electronic component coupled between the first oscillating resonator and the second oscillating resonator. A user adds an object to a surface of the oscillating resonator array. After adding the object, the system generates a second output signal by transmitting the excitation signal through the oscillating resonator array and determines a phase difference between the first output signal and the second output signal.03-21-2013
20120111114Method and Apparatus for Determining an Operating Point of a Work Machine - Method and apparatus for determining an operating point of a work machine and/or asynchronous motor driving the same, the operating point being characterized by the power consumed by and/or output rate of the machine, in which one or more operating point-dependent measurement variables of the machine are detected by sensors, and the measured values are evaluated and/or stored during operation of the machine. The operating point is determined without using electric measurement variables of the motor by determining a frequency linearly proportional to the fundamental tone of the machine through signal analysis, especially frequency analysis of a measured mechanical variable selected from pressure, differential pressure, power, vibration, and solid-borne or air-borne sound. From this, the rotational speed of the driving machine is determined, and the operating point characterized by the power consumed by and/or output rate of the machine is determined utilizing the rotational speed/torque relationship of the motor.05-10-2012
20090056452ACOUSTIC WAVE SENSOR SYSTEM - An acoustic wave sensor can be used to sense a liquid's properties such as temperature, corrosivity, density, and viscosity. Degraded measurements result when changes in one property are confused with changes in a different property. A rigid coating can minimize amount of measurement degradation due to viscosity changes in the liquid. A visco-elastic-interaction curve can be used to find the ideal thickness of the rigid coating, called the constant Q thickness. A visco-elastic-interaction curve relates the sensor Q to rigid coating thickness for a specific combination of sensor, liquid, and coating material.03-05-2009
20090235747Balanced mechanical resonator for powder handling device - A system incorporating a balanced mechanical resonator and a method for vibration of a sample composed of granular material to generate motion of a powder sample inside the sample holder for obtaining improved analysis statistics, without imparting vibration to the sample holder support.09-24-2009
20090235746Detecting And Measuring Live Pathogens Utilizing A Mass Detection Device - Extremely minute amounts of live pathogens are rapidly detected using a piezoelectric cantilever sensor. A single pathogen is detectable in about 30 minutes. Pathogen-specific antibodies are immobilized on the sensor surface. The sensor is exposed to a medium that potentially contains the target pathogen. When target pathogens are contained in the medium, both dead and live pathogen cells bind to the immobilized antibody on the sensor surface. The attached target pathogen cells are exposed to a pathogen discriminator capable of discriminating between live cells and dead cells by increasing the mass of live cells. Example pathogens include 09-24-2009
20090007671Inverse Method to Calculate Material Properties Using A Non-Resonant Technique - A method for calculating material properties of a material includes determining a dilatational wavespeed and a shear wave speed. The dilatational wavespeed is determined by conducting vertical vibration tests of two specimens of the material, one specimen being twice as thick as the other. Transfer functions are obtained from these tests and used to calculate the dilatational wavespeed. The shear wavespeed is determined by conducting horizontal vibration tests of two specimens with one specimen being twice as thick as the other. The shear wavespeed can be calculated from transfer functions obtained from these tests and the dilatational wavespeed. Other material properties can be calculated from the dilatational and shear wavespeeds. Frequency dependence of the properties can be determined by conducting the tests at different frequencies.01-08-2009
20090007672KIT AND METHOD FOR CONSTRUCTING VIBRATION SUPPRESSION AND/OR SENSING UNITS - Kits and methods for building devices for analyzing or suppressing vibrations in equipment are provided. An electrical-mechanical transducer is configured to be placed in operative contact with the equipment. The transducer may be directly mounted to a base plate that is configured for being mounted to the equipment. A first device (e.g., a printed circuit board) carrying electronic componentry is configured for transmitting vibration drive signals to the electrical-mechanical transducer. A second device (e.g., a printed circuit board) carrying electronic componentry is configured for receiving vibration sensing signals from the electrical-mechanical transducer. The first and second devices can be interchangeably mounted within a housing that can be mounted to the base plate. The housing may comprise an aperture for receiving the electrical-mechanical transducer.01-08-2009
20100089160METHOD FOR DETECTING A SONIC IMPRINT OF A THREE-DIMENSIONAL OBJECT & RELATED APPARATUS - Non invasive method used to detect a “sonic imprint” of three-dimensional objects, particularly suitable for the identification and monitoring of artworks, consisting in acquiring the vibrations caused by a source of elastic waves and using a set of detectors fixed in various predetermined points of the external surface of the object. An apparatus, cheap and simple to utilize, suitable to execute this method, is also described.04-15-2010
20090193895Sound field measuring method and sound field measuring device - A sound field measuring device according to the present invention uses a measurement signal which has at least one change point and whose frequency spectrum has a shape corresponding to a shape of a frequency spectrum of a background noise. This enables a sound field measurement, which is for measuring an impulse response or transfer function of a sound field space which is a linear time-invariant system to be measured, to be performed with a high S/N ratio over a wide frequency band.08-06-2009
20110138916SELF-EXCITING, SELF-SENSING PIEZOELECTRIC CANTILEVER SENSOR - A piezoelectric cantilever sensor includes a piezoelectric layer and a non-piezoelectric layer, a portion of which is attached to the piezoelectric layer. In one embodiment, one end of the non-piezoelectric layer extends beyond the end of piezoelectric layer to provide an overhang. The overhang piezoelectric cantilever sensor enables increased sensitivity allowing application of the device in more viscous environments, such as liquid media, as well as application in liquid media at higher flow rates than conventional piezoelectric cantilevers. In another embodiment, the sensor includes first and second bases and at least one of the piezoelectric layer and the non-piezoelectric layer is affixed to each of the first and second bases to form the piezoelectric cantilever sensor. In this embodiment, the sensor is robust and exhibits excellent sensing characteristics in both gaseous and liquid media, even when subjected to relatively high flow rates.06-16-2011
20130160550RESONANT DEVIVE WITH PIEZORESISTIVE DETECTION AND WITH A RESONATOR CONNECTED ELASTICALLY TO THE SUPPORT OF THE DEVICE, AND METHOD FOR MANUFACTURING THE DEVICE - A resonant device with piezoresistive detection includes a resonator connected elastically to the support of the device. The device includes: a support; a suspended resonator, which moves parallel to the plane of the support; means for actuating the resonator; and means for detecting the movement, including at least one piezoresistive gauge. The resonator is anchored to the support through at least one flexurally elastic element, to enable the threshold where a non-linear displacement regime appears to be raised. The device can be manufactured by a surface technology, and applies notably to resonant mass sensors.06-27-2013
20110296921METHOD OF DESIGNING TIRE AND TIRE - A method of designing a tire designs a tire comprising a step 12-08-2011
20110290024SYSTEM AND METHOD OF MECHANICAL FAULT DETECTION BASED ON SIGNATURE DETECTION - A mechanical fault detection method and system computes a similarity index to quantify the relationship of a measured spectral signature to a theoretical fault signature. A vibration sensor detects vibrations on machinery with rotating components. The vibration sensor generates a representation of the vibration and provides it to a vibration analyzer. The vibration analyzer is configured to identify peak amplitudes in the generated representation, determine a corresponding frequency for each of the peak amplitudes, and match the determined corresponding frequencies to a theoretical set of frequencies. The analyzer determines a number of matching frequencies and identifies a detection condition when the number of matching frequencies meets a predetermined criterion. The system and method combines vibration amplitude threshold detection with similarity index threshold detection to significantly reduce false fault alarms and false pass errors. The system and method is also used to identify incorrect vibration amplitude thresholds.12-01-2011
20090145231SHEAR MEASURING METHOD AND ITS DEVICE - A resonance shear measuring method capable of simple and rapid measurement by obtaining a resonance shear curve through Fourier transformation of a damping curve of an oscillation on one side surface of a sample during measurement of shear response from the sample is provided. The method is to measure shear response of the sample sandwiched between the solid surfaces of a resonance shear measurement unit along with a change in film thickness by applying an input signal U06-11-2009
20090308161ACOUSTIC METHOD AND APPARATUS FOR DETECTION AND CHARACTERIZATION OF A MEDIUM - An acoustic method and apparatus detects or characterizes a medium in a structure which may be a container, such as a pipeline for transportation of oil, gas, or hydrocarbon condensate. A pulse of broadband acoustic energy is emitted towards the structure by a first transducer. A return signal is generating by a second transducer from acoustic energy returned from the structure in response to the emission of acoustic energy. A return signal spectrum representing acoustic spectral components of the acoustic energy returned from the structure is derived from the return signal, and the medium is detected or characterized by applying a return signal processing medium detection or characterization algorithm to the return signal spectrum.12-17-2009
20100275689Tuning Fork Oscillator Activated or Deactivated by a Predetermined Condition - The present invention is a tuning fork oscillator for detection and measurement of corrosive or foreign materials. The elements include a means for mechanical excitation, and a mechanical oscillator, wherein said mechanical oscillator has a resonant frequency, f, and a quality factor, Q. A fuse fixed to the oscillator to change oscillator amplitude to or from essentially zero to resonance amplitude. In a preferred embodiment, the tuning fork has one region compatible with the service fluid and the other region is incompatible with the service fluid or other contaminant. The sensor alarms when a measured amount of the incompatible material has been removed or deposited.11-04-2010
20090165559METHOD AND APPARATUS FOR INTERFACIAL SENSING - A sensor is disclosed for analyzing information, such as interfacial interactions, found in various systems. A sensor is located proximate to an interface that is to be studied. The sensor is actuated in order to produce acoustical signals. The frequency of oscillation of the sensor is varied in order to enable the sensor to produce acoustical signals at different harmonics. The different acoustical signals are used to analyze the system at various distances from the surface of the sensor.07-02-2009
20080289419SYSTEM FOR ANALYSING THE FREQUENCY OF RESONATING DEVICES - The general field of the invention is that of resonating or vibrating devices. One of the tricky points with this type of device is that of correctly measuring the vibration frequency in a disturbed environment. The analysis system according to the invention is based on the use of the Hilbert transform of a function U representative of the position A of the vibrations of the device. More precisely, in its basic version, the analysis system comprises means making it possible to realize the second derivative of the function U denoted U11-27-2008
20100126275SELF-CALIBRATING ULTRASOUND SYSTEMS AND METHODS - Systems, apparatus, and methods for controlling acoustic power delivery at ultrasonic frequencies. An embodiment of the invention comprises an ultrasonic device including an ultrasonic transducer and an acoustic sensor having a fixed acoustic coupling to the transducer. A method of the invention may include sensing acoustic power output from the ultrasonic transducer in response to a calibration signal, and determining a drive frequency for a working drive signal to enable efficient and controllable operation of the transducer. The invention may be used for automatically re-calibrating ultrasound systems for optimum performance at frequencies including the range of 3 to 12 MHz.05-27-2010
20080271536Apparatus and Method for Testing Flow Noise - An apparatus and method for testing flow noise of a motor vehicle are provided. The apparatus includes a blast nozzle device having at least one blast nozzle, and a transport device. The blast nozzle device is designed for the targeted impingement of the outer skin of the motor vehicle by air flow, and the transport device is designed such that the blast nozzle device and the motor vehicle may be moved relative to one another. A microphone array is positioned in the interior of the motor vehicle and measures the flow noise in the interior of the motor vehicle. The microphone array is preferably a spherical array. The flow noise in the interior of the motor vehicle generated by the air flow is measured by use of the microphone array.11-06-2008
20090199638Measuring physical quantities using resonant structures - Apparatus and methods for measuring physical quantities making use of resonant structures, the resonant frequency of which changes with changes of the physical quantity. Techniques for detecting resonance are described. In one embodiment the apparatus comprises detecting circuit which has an arming circuit including a receiver which tracks the frequency of excitation signals and on the basis of the detected amplitude of the signals in that frequency range arms a comparator to compare signals indicative of the relative phase of the excitation signal and a signal reflected by the resonant structures which in turn allows resonance to be detected.08-13-2009
20120067125PHYSICAL QUANTITY SENSOR - A physical quantity sensor includes a beam-like vibrating body and a fixing part supporting both ends of the beam-like vibrating body. A driving element is formed on a central portion of the beam-like vibrating body, and feedback elements are formed on both ends. A physical quantity acting on the beam-like vibrating body is detected by causing natural vibration in the beam-like vibrating body and detecting a natural frequency of the vibrating body. This enables reliable detection of a physical quantity, such as a strain or load, acting on an object.03-22-2012
20090049912METHOD FOR RELIEVING RESIDUAL STRESS IN AN OBJECT - A method for relieving residual stress in an object includes: (a) applying a vibration energy to the object over a frequency range; (b) monitoring vibration behavior of the object over the frequency range so as to identify a reference frequency, where the vibration amplitude of a fundamental wave component of the wave pattern is approximately one third of a maximum vibration amplitude of a resonate frequency of the object, and an optimum frequency, where the frequency and the vibration amplitude of the harmonic wave component of the wave pattern are respectively larger than those of the harmonic wave component of the wave pattern of the reference frequency; and (c) applying the vibration energy to the object at the identified optimum frequency for an extended period of time.02-26-2009
20110138915DETECTING AN ANALYTE USING A PIEZOELECTRIC CANTILEVER SENSOR - A piezoelectric cantilever sensor includes a piezoelectric layer and a non-piezoelectric layer, a portion of which is attached to the piezoelectric layer. In one embodiment, one end of the non-piezoelectric layer extends beyond the end of piezoelectric layer to provide an overhang. The overhang piezoelectric cantilever sensor enables increased sensitivity allowing application of the device in more viscous environments, such as liquid media, as well as application in liquid media at higher flow rates than conventional piezoelectric cantilevers. In another embodiment, the sensor includes first and second bases and at least one of the piezoelectric layer and the non-piezoelectric layer is affixed to each of the first and second bases to form the piezoelectric cantilever sensor. In this embodiment, the sensor is robust and exhibits excellent sensing characteristics in both gaseous and liquid media, even when subjected to relatively high flow rates.06-16-2011
20090249877METHODS AND SYSTEMS FOR ULTRASONIC COUPLING USING ULTRASONIC RADIATION PRESSURE - Apparatus and methods for ultrasonic coupling using ultrasonic radiation pressure generating are provided. Ultrasonic energy is generated to propagate in the form of ultrasonic waves in a medium coupled to a second element. The ultrasonic energy is converged in the medium to couple the medium to an object located at a distance from the second element. Additional apparatus and methods are disclosed.10-08-2009
20100147078MEASURING APPARATUS - Measuring apparatus and method for monitoring fabrication of a semiconductor wafer by exciting and measuring vibrations of the wafer substrate. A measurable parameter of vibration (e.g. frequency) is indicative of mass of a vibrating region. Mass change caused by wafer treatment is reflected in changes in vibration measurements taken before and after that treatment. The apparatus includes a wafer support e.g. projecting ledge (06-17-2010
20100162815MANUFACTURING METHOD FOR ACOUSTIC WAVE SENSOR REALIZING DUAL MODE IN SINGLE CHIP AND BIOSENSOR USING THE SAME - Disclosed is a method of realizing a dual mode acoustic wave sensor capable of being operated in both a gas environment and a liquid environment in a single chip by disposing a surface acoustic wave filter and a surface skimming bulk wave filter perpendicular to each other on the same wafer using the peculiar cut-orientation of an piezoelectric element, i.e. ST-cut quartz. An acoustic wave biosensor can realize optimum detection performance by detecting the characteristics of a detection environment and a detection target in real time during the operation of a dual mode sensor, and automatically switching between an SAW mode and an SSBW mode.07-01-2010
20090314086Method of Determining the Presence of a Mineral Within a Material - The invention relates generally to a method of determining the presence of a mineral within a material, such as a rock, a rock fragment, soil, sand or other geological material including: applying pulsed microwave radiation to the material; detecting radiation emitted from the material after the application of the pulsed microwave radiation; and analysing the detected radiation to determine the presence of mineral within the material. The invention also provides a method of sorting rock fragments into at least two streams using this method and an apparatus for carrying out the method.12-24-2009
20100223999Elastic wave device and electronic component - To provide an elastic wave device that is small sized and in which a frequency fluctuation due to a change with time hardly occurs, and an electronic component using the above elastic wave device. A trapping energy mode portion 09-09-2010
20100212427RESONANT INSPECTION USING RECONFIGURABLE NEST - The present disclosure provides a device and method for non-destructive testing of an object using resonant ultrasound spectroscopy, wherein the device is provided with a reconfigurable nest for placement of objects of various shapes and sizes on the device. The reconfigurable nest includes a plurality of transducers that are held in place using a rheological fluid. As each transducer is arranged, for example, using a robotic tool, an electric or magnetic field is applied to the rheological fluid in contact with said transducer, thereby holding the transducer in place. This device and method thus provide a nest for a resonant inspection device that may be reconfigured in much less time and with much less effort when compared to existing solutions.08-26-2010
20100242607INSPECTION METHOD FOR DETERMINING A LOCATION OF INCIPIENT DAMAGE - A method for determining a location of incipient damage of an object comprises insonifying the object at a plurality of locations using ultrasonic signals during an inspection, acquiring signals indicative of a possible damage condition from the plurality of locations of the insonified object in said inspection, determining a value for each of the locations to indicate accumulated damage by mathematically combining the acquired signals from said inspection and at least a portion of prior inspections, and comparing the values of the plurality of locations to determine a location indicating possible incipient damage.09-30-2010
20090019934Micro-sensor for sensing chemical substance - The invention discloses a micro-sensor for sensing a chemical substance. The micro-sensor according to the invention includes a substrate, a micro-cantilever, an electrode structure, and a measuring device. The micro-cantilever is formed on the substrate and has a capturing surface for capturing chemical substances. The electrode structure is for supplying an electrical field. The electrical field is disposed so as to assist the capturing surface in capturing chemical substances. The measuring device, coupled to the micro-cantilever, is for measuring a variation on a mechanical property of the micro-cantilever induced by the captured chemical substance and interpreting the variation on the mechanical property of the micro-cantilever into information relative to the chemical substance.01-22-2009
20080314150Mechanical oscillator activated or deactivated by a predetermined condition - The present invention is a mechanical oscillator for detection and measurement of corrosive or foreign materials. The elements include a means for mechanical excitation, and a mechanical oscillator, wherein said mechanical oscillator has a resonant frequency, f, and a quality factor, Q. A fuse fixed to the oscillator to change oscillator amplitude to or from essentially zero to resonance amplitude. In a preferred embodiment, the mechanical oscillator has the shape of a tuning fork where one region is compatible with the service fluid and the other region is incompatible with the service fluid or other contaminant. The sensor alarms when a measured amount of the incompatible material has been removed or the physical strength of the material has been compromised.12-25-2008
20080314149SENSOR AND TRANSDUCER DEVICES COMPRISING CARBON NANOTUBES, METHODS OF MAKING AND USING THE SAME - Devices usable as sensors, as transducers, or as both sensors and transducers include one or more nanotubes or nanowires. In some embodiments, the devices may each include a plurality of sensor/transducer devices carried by a common substrate. The sensor/transducer devices may be individually operable, and may exhibit a plurality of resonant frequencies to enhance the operable frequency bandwidth of the devices. Sensor/transducer devices include one or more elements configured to alter a resonant frequency of a nanotube. Such elements may be selectively and individually actuable. Methods for sensing mechanical displacements and vibrations include monitoring an electrical characteristic of a nanotube. Methods for generating mechanical displacements and vibrations include using an electrical signal to induce mechanical displacements or vibrations in one or more nanotubes. Methods for adjusting an electrical signal include passing an electrical signal through a nanotube and changing a resonant frequency of the nanotube.12-25-2008
20090114018PANEL INSPECTION APPARATUS AND INSPECTION METHOD - A panel inspection apparatus includes a resonant frequency extracting unit for extracting a plurality of resonant frequencies of a panel, a resonant frequency selecting unit for selecting a combination of resonant frequencies consisting of two resonant frequencies A and B with different vibration propagation paths among the extracted plurality of resonant frequencies, a non-defective range generating unit for generating a non-defective range on a coordinate system in which resonant frequencies A and B are taken on coordinate axes by statistically processing a set of the resonant frequencies A and B selected for each of a plurality of non-defective panels determined as non-defective in advance, and a panel quality determining unit for determining whether the quality of the panel to be inspected is good based on comparison between resonant frequencies A and B selected for the panel to be inspected and the non-defective range generated by the non-defective range generating unit.05-07-2009
20080229829PIEZOELECTRIC OSCILLATOR, SENSOR, AND MULTI-SENSOR - A piezoelectric oscillator includes: a piezoelectric substrate having at least a vibrating part and a base part; an excitation electrode formed on the vibrating part; and an oscillation circuit formed on the base part. In the piezoelectric oscillator, the oscillation circuit includes a thin film transistor made of one of polysilicon and monocrystalline silicon and is coupled to the excitation electrode.09-25-2008
20110016974APPARATUS AND METHOD FOR DETECTING DAMAGE TO A MACHINE - An apparatus for detecting damage to a machine that is excited at a previously known frequency by a vibration exciter, including an acceleration sensor for recording a current amplitude spectrum of an upper mass. A previously known amplitude spectrum of the upper mass is stored in a memory device. The current amplitude spectrum is compared with the previously known amplitude spectrum in a comparison device. If the comparison device determines that the spectra differ from one another, a corresponding deviation signal is generated and is output via a display device for informing the operator in order to inform the latter of possible damage.01-27-2011
20120067124RESONANT SENSING USING EXTENSIONAL MODES OF A PLATE - A device or system that incorporates teachings of the present disclosure may include, for example, a resonant structure having a plate, a mass and a set of electrodes. The plate can have an extensional mode at a frequency when excited. The set of electrodes can be used to measure an acceleration of the mass when the acceleration of the mass changes the frequency of the plate. Other embodiments are disclosed.03-22-2012
20110209546METHOD AND DEVICE FOR VIBRATION ANALYSES AND SAMPLE DATABASE THEREFOR AND USE OF A SAMPLE DATABASE - The invention relates to a method and to a device for sound emission analysis, wherein vibrations occurring during the use of a component, during the testing of a component or during the processing of a work piece by means of chipping, welding, forming, joining and/or separating or the like are registered and evaluated, wherein a vibration spectrum is recorded at different times or continuously and subjected to a multi-dimensional evaluation.09-01-2011
20090217759Method of Determining Sublimate in Thermoset Film with Qcm Sensor - A method for measuring an amount of a sublimate in real time with respect to a lapse of heating time, comprising: adhering the sublimate from a thermoset film during heating to a surface of a crystal oscillator using a nozzle inserted into a detection part; and measuring the amount of the sublimate from a change in a resonance frequency corresponding to the amount of the sublimate adhered to the crystal oscillator. In the method, the thermoset film may be formed on a silicon wafer and the measurement is performed while the thermoset film is heated by a heat source disposed under the silicon wafer; or the sublimate may be set so as to flow together with an airstream ascending toward an upper part of an enclosure covering the thermoset film, and the airstream directly contacts the crystal oscillator through the nozzle inserted into the detection part disposed in the path of the airstream.09-03-2009
20110072902METHOD OF ESTIMATING SUPPORT STATE OF AN ELECTRONIC APPARATUS HOUSING AND ELECTRONIC APPARATUS - In a method of estimating one of mechanical supporting states of a housing for an electronic apparatus, a drive signal is supplied to an oscillation device from which first oscillation is applied to the housing. A sensor detects a second oscillation transferred through the housing in response to the first oscillation to generate an oscillation signal, and a measurement response characteristic is obtained based on the drive signal and the oscillation signal, and is compared with reference response characteristics which are correlated with the mechanical supporting states, respectively, to estimate one of the mechanical supporting states of the housing.03-31-2011
20100058866MAGNETOSTRICTIVE SUBSTANCE DETECTION SYSTEM AND METHOD - There is provided a method of detecting the presence of a substance comprising providing a cantilever (03-11-2010
20110072901DEVICE AND METHOD FOR DETECTING ELEMENTS IN A FLUID ENVIRONMENT - The device for detecting elements in a fluidic medium comprises at least one acoustic resonator having a surface intended for fixing the elements. The resonator includes means for generating and measuring Lamb waves, favouring the generation of symmetrical Lamb waves. The device analyses the resonant frequency of the resonator in order to determine the variation in the resonant frequency of the symmetrical Lamb waves representative of the presence of the elements.03-31-2011
20110061462CRYSTAL OSCILLATOR, AND MEASUREMENT METHOD USING SAME - [Problem] A crystal oscillator, and a measurement method using same are provided with which the density of a solution can be measured alone, or both the density and the viscosity of a solution can be measured at the same time using a single detector provided for the crystal oscillator.03-17-2011
20120118063APPARATUS AND METHOD FOR MEASURING BUOYANT MASS AND DEFORMABILITY OF SINGLE CELLS - Method for determining buoyant mass and deformability of a cell. The method includes introducing the cell into a suspended microchannel resonator that includes a constriction near a distal location in the resonator. A first frequency shift in the resonator is monitored as a cell moves to the distal location in the resonator, the first frequency shift being related to the buoyant mass of the cell. Transit time of the cell through the constriction is measured by monitoring a second frequency shift as a result of a change in cell location as it passes through the constriction, whereby deformability is determined from the measured buoyant mass and transit time.05-17-2012
20110146405Differential Pressure Measuring Probe With Bottoming Indicator - The present invention relates to a method and apparatus for determining the point at which the distal end of the bluff body sensor of an averaging pitot tube makes anchoring contact with the inside wall of a fluid conducting conduit during insertion of the bluff body into the conduit, which method includes monitoring the amplitude of vibrations generated in the bluff body in response to the fluid flowing in the conduit by the use of an accelerometer carried by the bluff body and an associated readout instrument connected to the output of the accelerometer for displaying data responsive to the output of the accelerometer and specifically indicating a change in the sensed amplitude values which change advises that the support mode of a bluff body inserted into the conduit has altered.06-23-2011
20110247415Method and Encoder - A method and an encoder are adapted to determine one or more parameters, each parameter being related to a type of vibration for the encoder. The encoder is mounted on an axis and arranged to detect rotary movement of the axis.10-13-2011
20090139334Method and a System for Monitoring the Condition and Operation of Periodically Moving Objects - A system and a method for calculating a synchronized time average for a measurement signal obtained from an object to be measured and containing periodical variations. In the method: from the periodical variations of the measurement signal a frequency is determined, said frequency corresponding within predetermined limits to a frequency estimated as the periodicity characteristic of the object to be measured; a signal component representing the determined frequency is separated from the measurement signal by filtering, and the filtered signal is used as a synchronizing signal, and the measurement signal is divided into sequences by means of the synchronizing signal, and the synchronized time average of the sequences is calculated. In an example of the method, the rotating frequency or the moving frequency of the object selected as the periodicity characteristic to the object.06-04-2009
20090139333Ultrasonic Probing Method and Apparatus Therefor Utilizing Resonance Phenomenon - A flaw Z with a long probing length inside a probing target is allowed to be probed. The waves other than the probing target waves are removed or reduced, so that the individual difference in the sizing result due to the ability of the measuring personnel is eliminated to improve the precision of the probing. A transmission probe 06-04-2009
20110041611METHOD AND APPARATUS FOR RECOGNIZING A BEARING DAMAGE USING OSCILLATION SIGNAL ANALYSIS - A device for recognizing bearing damage of a bearing (02-24-2011
20110041610EXTENSION SENSING ACTUATOR - A device comprising a solid-state actuator (02-24-2011
20120167687METHOD AND APPARATUS FOR ESTIMATING CONTACT PATCH SHAPE OF TIRE - A simple method and apparatus for accurately estimating the contact patch shape of a moving tire. The vibration waveforms of a tire (07-05-2012
20110259103AXIAL VIBRATION MONITORING FOR DETECTING SHAFT MISALIGNMENTS IN TURBOMACHINARY TRAINS - A system for determining a shaft misalignment in a turbomachinary train having a plurality of components with serially coupled rotating shafts. A disclosed system includes a sensor affixed to a component of the turbomachinary train proximate a rotating shaft, wherein the sensor collects vibration data along an axial direction of the rotating shaft. Also provided is a frequency analyzer for generating frequency domain data from the vibration data and an analysis system for analyzing a frequency component of the frequency domain data at one times a rotational frequency of the rotating shaft to identify a misalignment between the rotating shaft and an adjacently coupled rotating shaft.10-27-2011
20100031748Non-linear Optical Imaging of Protein Crystals - Methods for detecting and evaluating the quality of protein crystals are provided comprising subjecting a sample to second order non-linear optical imaging and detecting the second harmonic generation signal.02-11-2010
20100024555Controlling a device that generates vibrations in a computer system - Some embodiments of the present invention provide a system that controls a device that generates vibrations in a computer system. During operation, a critical vibration frequency is determined for the computer system. Next, a keep-out zone is generated based on the critical vibration frequency, wherein the keep-out zone specifies a range of frequencies to be avoided. Then, the device is controlled based on the keep-out zone to reduce vibrations generated by the device in the keep-out zone.02-04-2010
20100018311ULTRASOUND INSPECTION METHODS FOR NOISY CAST MATERIALS AND RELATED PROBES - Ultrasound inspection methods for noisy materials and related probes are disclosed to inspect a defect in a cast material that use polycarbonate delay layers having a first surface configured to be disposed on a surface of the cast material; and an acoustic crystal element disposed on a second surface of the polycarbonate delay layer.01-28-2010
20100018310MOLECULAR CONTROL OF SURFACE COVERAGE - The concentration of a material covering a surface is controlled via an equilibrium process. Equilibrium parameters such as a concentration of the provided material, the exposure time of the material to the surface, and the surface area of an attractor applied to the surface are determined utilizing a millimeter sized piezoelectric cantilever sensor. In an example embodiment, the material is provided at a low concentration to the surface until equilibrium is attained. The amount of material accumulated on the surface is determined utilizing the cantilever sensor. The surface area of the attractor and the measured amount of material are utilized to determine the amount of the attractor surface area having the material bound thereto. Knowledge of the equilibrium parameters allows controlled surface coverage of the material on the attractor for any application. The concentration of the material adsorbed on the surface is precisely determinable and repeatable.01-28-2010
20090301196PIEZOELECTRIC AND PIEZORESISTIVE CANTILEVER SENSORS - An apparatus for sensing a target substance includes a substrate, an elongated electroactive cantilever, a functional layer and an electrical sensor. The elongated electroactive cantilever includes a first surface and an opposite second surface. The elongated electroactive cantilever includes an electroactive member extending outwardly from the substrate. The functional layer is applied to the first surface and includes a material that reacts with the target substance so that when the functional layer is in the presence of the target substance, the functional layer will cause a change in an electrical property of the electroactive cantilever. The electrical sensor is coupled to the electroactive cantilever and is configured to sense the electrical property of the electroactive cantilever.12-10-2009
20120036932TESTING TECHNIQUE FOR DETERMINATION OF THE DYNAMIC POISSON'S RATIO OF A MATERIAL WITH LONGITUDINAL AND CROSS-SECTIONAL RESONANT FREQUENCIES OF A CIRCULAR SOLID ROD SPECIMEN - A method of determining the dynamic Poisson's ratio of a material with a circular solid rod is provided. The method includes at least the following steps. 1. a circular solid rod specimen with the material to be determined for its dynamic Poisson's ratio is manufactured; 2. the length and diameter of the circular solid rod specimen is measured; 3. both the fundamental longitudinal and cross-sectional resonant frequencies of the circular solid rod specimen are obtained through experiments; 4. the dynamic Poisson's ratio of the material according to the formula provided in this invention is calculated; 5. the validity of geometric dimension of the circular solid rod specimen is justified.02-16-2012
20120060608PASSAGE DETECTION APPARATUS OF OBJECT - A passage detection apparatus is configured to detect the change in the properties (propagation state of sound wave, dielectric constant, etc.) of a specific space, which changes according to the passage of an object in the specific space and the size of the object. The passage detection apparatus includes a pair of detection units and configured to transmit and receive signals to and from an external device. The specific space is formed by the space between the detection unit and the detection unit. The detection unit is supported by a first substrate. The detection unit is supported by a second substrate that is parallel to the first substrate, and arranged at the position corresponding to the detection unit supported by the first substrate.03-15-2012
20120000288PHYSICAL QUANTITY SENSOR - A physical quantity sensor includes a deformable body in which strain occurs in response to a stress applied thereto, a vibrator vibrating with a frequency according to the strain or with an amplitude according to the strain, and a processor processing a signal output from the vibrator. The vibrator is mounted to the deformable body such that the strain transmits to the vibrator. The processor is bonded to the deformable body such that the strain does not substantially transmit to the processor. This physical quantity sensor can stably detects strain and tension acting on an object.01-05-2012
20110154901ACOUSTIC DEVICE FOR LOCALIZED CONTACTLESS MEASUREMENT OF ELASTIC AND DISSIPATIVE NON-LINEARITIES AND VISCOELASTICITY - The disclosure relates to an acoustic method and device for localized, contactless, measurement of elastic and dissipative non-linearities and dynamic non-linear viscoelasticity in a medium subjected to a low-frequency acoustic stress and probed by ultrasonic pulses or wave trains. For this purpose, the disclosure relates to an acoustic, localized and contactless device for measuring elastic and dissipative nonlinearities and viscoelasticity of a specimen, wherein it includes: means for transmitting a low-frequency acoustic wave and means for receiving said low-frequency acoustic wave, which means are capable of creating a low-frequency periodic variation of the hydrostatic pressure in the specimen; means for generating high-frequency ultrasonic pulses and means for receiving said pulses; and an analysis unit that includes a model for calculating the modulations in the time of flight and in the amplitude of the ultrasonic pulses that are induced by the low-frequency acoustic wave passing through the specimen, so as to quantify the elastic and dissipative non-linearities and the non-linear viscoelasticity of the specimen.06-30-2011
20110154900VIBRATION MONITORING APPARATUS AND VIBRATION MONITORING METHOD - The present invention provides a vibration monitoring apparatus that monitors vibration of a jet pump disposed in a reactor pressure vessel using ultrasonic wave, including: an ultrasonic sensor that is attached to an outside the reactor pressure vessel, and transmits and receives ultrasonic wave; a reflector that is mounted on a surface of a riser pipe of the jet pump, and includes a planar reflecting surface that can reflect ultrasonic wave; and a signal processing unit that performs signal processing of the ultrasonic wave transmitted by the ultrasonic sensor, reflected by the reflecting surface of the reflector, and received by the ultrasonic sensor, and measures a vibration amplitude of the riser pipe and calculates a vibration waveform.06-30-2011
20120060607VIBRATION TRANSDUCER AND ITS MANUFACTURING METHOD - A vibration transducer includes a silicon single crystal vibration beam provided over a silicon single crystal substrate, the vibration beam having a sectional shape that is longer in a direction perpendicular to a surface of the silicon single crystal substrate than in a direction parallel with it, a shell made of silicon, surrounding the vibration beam with a gap, and forming a vacuum room together with the silicon single crystal substrate, a plate-like first electrode plate disposed parallel with the surface of the silicon single crystal substrate, the first electrode plate having one end connected to the vibration beam, plate-like second and third electrode plates disposed parallel with the surface of the silicon single crystal substrate so as to be opposed to each other with the vibration beam interposed in between, and asperities formed on confronting side surfaces of the vibration beam and the second and third electrode plates.03-15-2012
20110088471Instrumentation and Analytical Techniques Suitable For Broadband Acoustic Resonance Dissolution Spectroscopy - A new analytical technique, instrument and method of testing a material utilising same is provided. The method of analysing a test material comprises the steps of (vii) inducing an acoustic emission from a vessel containing a solvent and measuring said emissions; (viii) dissolving a known amount of the test material in the solvent; measuring changes in resonance and absorbance frequencies before and after dissolution to produce a broadband acoustic resonant dissolution emission profile.04-21-2011
20120125107TEMPERATURE DEPENDENT PHOTOACOUSTIC IMAGING - Methods and systems relating to temperature dependent photoacoustic imaging are provided.05-24-2012
20120210794SENSOR DEVICE AND METHOD - A sensor device including a mechanical oscillator, an excitation unit which is configured to excite the mechanical oscillator to perform a mechanical oscillation within a non-linear range at a varying excitation frequency, and an evaluation unit configured to detect a jump, arising as a result of anharmonicity, in a resonance oscillation of the mechanical oscillation of the mechanical oscillator.08-23-2012
20110179872DRIVE CIRCUIT AND PHYSICAL QUANTITY SENSOR DEVICE - An amplitude detection circuit detects the amplitude value of a monitor signal responsive to self-excited vibration of a physical quantity sensor. A waveform shaping circuit converts the monitor signal to a pulse signal. A pulse amplitude modulation circuit adjusts the amplitude of the pulse signal according to the amplitude value obtained by the amplitude detection circuit and outputs the result as a drive signal for control of the self-excited vibration of the physical quantity sensor.07-28-2011
20100050772Nanomechanical Resonance Detector - An embodiment of a nanomechanical frequency detector includes a support structure and a plurality of elongated nanostructures coupled to the support structure. Each of the elongated nanostructures has a particular resonant frequency. The plurality of elongated nanostructures has a range of resonant frequencies. An embodiment of a method of identifying an object includes introducing the object to the nanomechanical resonance detector. A resonant response by at least one of the elongated nanostructures of the nanomechanical resonance detector indicates a vibrational mode of the object. An embodiment of a method of identifying a molecular species of the present invention includes introducing the molecular species to the nanomechanical resonance detector. A resonant response by at least one of the elongated nanostructures of the nanomechanical resonance detector indicates a vibrational mode of the molecular species.03-04-2010
20120227497GYROSCOPIC SENSOR - The invention relates to an gyroscopic sensor comprising a sensitive element designed to vibrate; an electrode carrier capable of carrying excitation/detection electrodes for exciting the sensitive element and for detecting the vibration of the sensitive element; and elements for supporting the electrode carrier. The supporting elements comprise a base made of a material having a density of less than 5 kg/dm09-13-2012
20100326193System and Method for Characterizing Vibration of a Rack Structure - A system for characterizing vibration of a rack structure having at least one hard disk drive disposed therein and a vibration exciter operatively associated with the rack structure includes one or more computers. The one or more computers are configured to command the vibration exciter to provide vibration input to the rack structure and to command a plurality of reads from the at least one hard disk drive such that, for each of the plurality of reads, data stored on the at least one hard disk drive is retrieved from the at least one hard disk drive. The one or more computers are also configured to obtain read rate information related to the plurality of reads and to identify at least one resonant frequency of the rack structure based on the read rate information.12-30-2010
20100326192DIGITAL BALLISTIC IMPACT DETECTION SYSTEM - Methods and devices for a miniature, ultra-low power impact recorder for detecting, quantifying and recording the energy of an explosive blast or ballistic projectile impact. In one embodiment, the impact recorder can included a sensor comprised of an array of electromechanical resonators that is sensitive to the vibrations produced in selected, discrete frequency ranges that approximate the spectral signature characteristics of the shockwave resulting from the ballistic impact event, even after traveling through impacted material or body tissues.12-30-2010
20090288488PIEZOELECTRIC SENSOR AND SENSING INSTRUMENT - To provide a piezoelectric sensor in which a first electrode for measurement and a second electrode for reference are provided apart from each other on one surface side of a piezoelectric piece and a common electrode is provided on the other surface side so as to face the first and second electrodes, and which achieves highly reliable oscillation by reducing the influence of electrical coupling between the first electrode and the second electrode. A piezoelectric sensor includes: a first electrode for measurement and a second electrode for reference provided apart from each other on one surface side of a piezoelectric piece; a common electrode provided on the other surface side of the piezoelectric piece commonly for the first electrode and the second electrode to face the first electrode and the second electrode; and an adsorption layer formed on an area, of the common electrode, to which the first electrode is projected, to adsorb a substance to be sensed. This structure prevents the first electrode and the second electrode from being electrically coupled due to the impedance of the sample fluid.11-26-2009
20120318062VIBRATION DETERMINATION METHOD AND VIBRATION DETERMINATION DEVICE - Determination of chatter vibration is done for a plurality of peak values that appears when frequency-domain vibrational acceleration is obtained through fast Fourier analysis on time-domain vibrational acceleration. In machining at a low rotation speed and machining using a tool with small flute number in particular, a type of chatter vibration that has occurred can be accurately determined, and “natural vibration type forced chatter vibration” occurring due to friction between a tool and a workpiece and an impact force caused by machining can also be determined.12-20-2012
20120279306Mechanical Nanoresonator for Extremely Broadband Resonance - In an embodiment, provided are nanoresonators, nanoresonator components and related methods using the nanoresonators to measure parameters of interest. In an aspect, provided is a nanoresonator component comprising an elongated nanostructure having a central portion, a first end, and a second end and an electrode having a protrusion ending in a tip that is positioned adjacent to the elongated nanostructure. The electrode is used to impart a highly-localized driving force in a perpendicular direction to the nanostructure to induce geometric non-linear deformation, thereby generating non-linear resonance having a broadband resonance range that spans a frequency range of at least one times the elongated nanostructure natural resonance frequency.11-08-2012
20100199765METHODS AND APPARATUS FOR DETECTION OF AIR INGRESS INTO CRYOGEN VESSELS - In an apparatus and a method for detecting deposition of solid frost caused by air ingress into a cryogen vessel, a quartz crystal microbalance, that includes a crystal sensor, is placed within the cryogen vessel, and an actuating circuit actuates resonance of the crystal sensor, and detection equipment detects a change in the resonant characteristics of the crystal sensor caused by frost deposition on the crystal sensor, and signaling equipment indicates the detected change.08-12-2010
20080236284Vibration Measurement System - The invention relates to a vibration measurement system for frequency-selective oscillation measurement in particular of low frequencies as are relevant in the field of automation and drive technology. The invention proposes coupling a broadband transmitter structure, which is excited directly by the excitation signal to be determined, via an electrostatic or inductive force to a receiver structure. This force coupling results in amplitude modulation of a carrier signal exciting the receiver structure. The actual excitation signal can be extracted from the spectrum of the amplitude-modulated carrier signal, for example by suitably selecting the frequency of the carrier signal. In order to make an oscillation analysis possible which is as unsusceptible to interference possible, an interference signal brought about, for example, by connector excitations is largely eliminated in advance from the amplitude-modulated carrier signal.10-02-2008
20080229828Establishing reputation factors for publishing entities - The architecture utilizes the network effects of patents, journals, authors, institutions, and funding entities, for example, to establish an objective reputation factor. The reputation factor contributes to a higher perceived relevance as well as provides interesting new services that could be built on top. The algorithm takes into account not only the number of cited-by references for a certain paper, author, or institution, but can also generate a higher ranking for cross-disciplinary citations, citations establishing a new area of science, acknowledgement citations, and constantly-updated reputation factors of different important entities, such as co-authorship, institutional affiliation, and journal impact factor. Impact factors can be fed back into the system for consideration in generating the reputation factor.09-25-2008
20130167643METHOD AND CIRCUIT FOR DETERMINING RESONANT FREQUENCIES OF A RESONANT DEVICE - A method determines a resonance frequency of a resonant device. The method includes stimulating the resonant device with a periodic input signal having a frequency in a frequency interval; determining a frequency value for said periodic input signal in said frequency interval for which a phase-difference between said periodic input signal and a corresponding periodic output signal of the resonant device is minimum; generating a flag indicating that a resonance frequency has been determined; and generating signals representing said resonance frequency as a value of the frequency of said periodic input signal.07-04-2013
20080223135METHOD OF DETECTING DAMAGE TO AN ENGINE BEARING - The invention relates to a method of detecting damage in a bearing supporting at least one rotary shaft of an engine in rotation, the method consisting in: defining a measurement period corresponding to a range of speeds of rotation of the shaft during renewable activity at low speeds of operation of the engine; acquiring over the entire measurement period a vibratory signal representative of acceleration of components of the engine; sampling the vibratory signal as a function of the speed of rotation of the shaft during the measurement period; transforming the sampled vibratory signal into a frequency signal to obtain frequency spectrum lines as a function of the speed of rotation of the shaft; calculating the mean of the amplitudes of the spectrum lines; determining amplitude peaks around multiples of the theoretical frequency of a damaged roller; calculating the ratio between each amplitude peak and the amplitude level determined for a sound bearing; and comparing the ratio that is obtained with at least one predetermined damage threshold.09-18-2008
20080223134Method and Device For Testing the Stability and/or Bending Strength of Masts - The invention relates to a method and a device (09-18-2008
20130125653SYSTEM AND METHOD FOR MEASURING THE FREQUENCY OF A VIBRATING OBJECT - A system and method for measuring a frequency of a wire in a vibrating wire gauge. The system may include a signal generator for generating a signal at a frequency that matches a frequency of the wire vibration and an excitation unit for exciting the wire to increase an amplitude of the wire vibration. The excitation unit may excite the wire using the signal. The system may further include a signal gate for controlling when the signal is sent to the excitation unit.05-23-2013
20080196503Vibration Measuring System - The invention relates to a vibration measuring system for the frequency-selective measuring of especially low-frequency vibrations such as they are relevant in the area of automation and motive power engineering. The aim of the invention is to provide a system which allows an economical vibration analysis of frequencies in the range of from 0 to 1 kHz. For this purpose, a broad-band transmitting structure which is directly induced by the excitation signal to be determined is coupled to a receiving structure by means of an electrostatic or inductive force. This force coupling brings about an amplitude modulation of a carrier signal inducing the receiving structure. The spectrum of the amplitude-modulated carrier signal can then be used to extract the actual excitation signal, e.g. by suitably choosing the frequency of the carrier signal.08-21-2008
20090013786Method for Measuring and/or Regulating the Oscillation Amplitude of an Ultrasonic Transmitter, and an Ultrasonic Welding Device - The invention relates to a method for measuring and/or regulating the oscillation amplitude of an ultrasound oscillator of an ultrasound device. In order to be able to measure or regulate the oscillation amplitude of the ultrasound oscillator in a simple manner, it is proposed that a sensor capturing the oscillation amplitude be associated with at least one component element of the ultrasound oscillator.01-15-2009
20100307248MICROSTRUCTURE INSPECTING DEVICE, AND MICROSTRUCTURE INSPECTING METHOD - A microstructure inspecting device 12-09-2010
20130180335STRIKING DETECTION DEVICE AND METHOD - Based on a peak level of a waveform in a predetermined period after the input of the waveform started and a value indicative of the degree of change in the waveform in the predetermined period, a judging device determines whether the waveform is caused by a strike. Thus, the peak level and a value indicative of the degree of change in the waveform are considered to determine whether the waveform is caused by a strike. A waveform with a small peak level caused by a weak strike is not erroneously detected as noise, while accurate detection of strikes can be obtained.07-18-2013
20130180336VIBRATION DETECTOR AND METHOD - A vibration detector (07-18-2013
20110303012METHOD AND DEVICE FOR MEASURING THE THICKNESS OF ANY DEPOSIT OF MATERIAL ON AN INNER WALL OF A STRUCTURE - A method of measuring the thickness of any deposit of material (12-15-2011
20110303011SENSOR APPARATUS, SYSTEM AND METHOD PROVIDING COUPLING CHARACTERIZATION - A sensor apparatus, a sensor system and a method employ coupling characterization of a sensor housing to a local environment. The apparatus includes a vibration sensor and a vibration actuator attached to and enclosed by the sensor housing in a spaced apart relationship. The vibration actuator is configured to vibrate the sensor housing with a vibration signal to excite a coupling between the sensor housing and the local environment. A response of the sensor housing to the vibration signal is indicative of a coupling characteristic of the coupling. The system further includes a coupling structure. The method includes coupling the sensor housing to the local environment, vibrating the sensor housing with the vibration actuator and detecting the response that is indicative of the coupling characteristic.12-15-2011
20130192372RESONANT SENSOR MEASUREMENT DEVICE - Device for the measurement of at least one physical variable, comprising at least: 08-01-2013
20120042730RESONANCE TESTING APPARATUS AND ARTICULATION ASSEMBLY - A resonance testing apparatus has a plurality of arms for supporting a workpiece. At least one of said arms incorporates an articulation assembly having: a strut, a joint element which is movable in response to movement of the strut, and a clamp arrangement for clamping the joint element. The assembly has a first condition in which the joint element is movable and a second condition in which the clamp arrangement acts on the joint element to damp or restrict movement of the strut. The assembly includes a seating for the joint element, and a biasing arrangement for the seating. The assembly has a first condition in which the joint element is arranged on the seating and is movable on the seating and a second condition in which the biasing arrangement acts on the seating to damp or restrict movement of the joint element on the seating.02-23-2012
20130098156METHOD FOR ANALYZING VIBRATION PROPERTY OF MEMBER INCLUDING PIEZOELECTRIC ELEMENT - A method for accurately and speedy analyzing vibration property of head suspension including a piezoelectric element that moves a head according to voltage application. The method comprises a displacement obtaining step obtaining displacement of each node point of the piezoelectric element by voltage application to the piezoelectric element, a reaction force obtaining step eliminating the voltage application and applying the obtained displacement to each node point, a reaction force applying step eliminating the applied displacement and applying obtained reaction force to each node point, and an analyzing step performing the frequency response analysis by using mode superposition method.04-25-2013
20120085172MEASURING SYSTEM FOR RESONANT FREQUENCY MEASUREMENTS ON DISC BRAKE PADS - A system is provided for measuring the resonant frequencies on disc brake pads. The system includes a data recording apparatus and a measuring device in the form of a sensor system. In order to record a maximum number of resonant frequencies, the sensor system consists of two or more microphones.04-12-2012
20130205902ASYMMETRIC SENSOR - An asymmetric sensor having asymmetric electrodes and/or being asymmetrically anchored provides enhanced sensitivity. In example embodiments, part of the electrode on a sensor is etched or removed resulting in enhanced mass-change sensitive resonant modes. In another example embodiment, a sensor is anchored asymmetrically, also resulting in enhanced mass-change sensitive resonant modes. By asymmetrically anchoring a piezoelectric portion of a sensor, resonant bending modes of the sensor can be measured electrically without external instrumentation. Modifying the electrode of a piezoelectric cantilever enables expression of mass-change sensitive resonant modes that normally do not lend themselves to electrical measurement.08-15-2013

Patent applications in class Resonance, frequency, or amplitude study

Patent applications in all subclasses Resonance, frequency, or amplitude study