Class / Patent application number | Description | Number of patent applications / Date published |
073540410 | Vibration | 34 |
20080314128 | Viscosity sensor - A viscosity sensor for, e.g., outputting a signal representing the viscosity of engine oil has one or more piezoelectric diaphragms disposed in a fluid chamber of a housing. An elongated amplification channel is formed in the housing and extends away from the chamber. The diaphragm can be excited to induce fluid movement that in turn induces the diaphragm to output a sensor signal representative of the viscosity of the fluid. | 12-25-2008 |
20090025459 | IMPLANTABLE VISCOSITY MONITORING DEVICE AND METHOD THEREFOR - An apparatus includes an implantable acoustic viscosity sensor configured to acoustically obtain a viscosity signal indicative of a viscosity of a fluid in contact with the viscosity sensor. A viscosity measurement circuit produces a viscosity measurement from the viscosity signal. | 01-29-2009 |
20090064766 | METHOD AND DEVICE FOR MEASURING THE VISCOSITY OF NON-NEWTONIAN LIQUIDS, IN PARTICULAR ENGINE OPERATING MATERIALS - A method and a device for measuring the viscosity of non-Newtonian liquids, in particular engine operating materials, a first and a second viscosity measurement being carried out using a viscosity sensor device, and a differing excitation of the non-Newtonian liquid taking place for the first and second viscosity measurement. | 03-12-2009 |
20090078029 | Powdery/granular material flowability evaluation apparatus and method - The present invention aims to provide a powdery/granular material flowability evaluation apparatus and a powdery/granular material flowability evaluation method capable of evaluating the flowability of a powdery/granular material in a dynamic state of the powdery/granular material. A powdery/granular material flowability evaluation apparatus A according to the present invention is provided with a hopper part | 03-26-2009 |
20090120169 | FLUID SENSOR AND METHODS OF MAKING COMPONENTS THEREOF - A fluid sensor has an electrically grounded header and a plurality of feedthrough conductors extending through the header between opposite ends of the header. The feedthrough conductors are connected to a piezoelectric tuning fork resonator. A temperature sensor is adjacent the tuning fork resonator. A shroud partially encloses the tuning fork resonator and temperature sensor. A printed circuit board is in conductive electrical contact with the feedthrough conductors. The printed circuit board includes an ASIC chip operable to transmit a variable frequency signal to the tuning fork resonator through the feedthrough conductors to oscillate the tuning fork resonator and to monitor impedance of the tuning fork resonator as a function of frequency. The ASIC chip is spaced from the feedthrough conductors a distance of no more than about 2 mm. The printed circuit board is spaced from the tuning fork a distance of no more than about 20 mm. | 05-14-2009 |
20100005865 | Method for measuring viscosity and/or elasticity of liquid - The present invention provides a method for measuring the viscosity and/or elasticity of a liquid by which accurate viscoelasticity measurement can be performed on a wide variety of liquids to be tested ranging from low viscosity liquids to high viscosity liquids, and viscosity and/or elasticity can be precisely determined from the viscoelasticity. This method includes: measuring three frequency values that are the resonance frequency value (f | 01-14-2010 |
20100170327 | APPARATUS AND METHOD FOR MEASURING THE COAGULATION CHARACTERISTICS OF A TEST LIQUID - An apparatus and a method for measuring the coagulation characteristics of a test liquid ( | 07-08-2010 |
20100236323 | METHOD FOR DETERMINING AND/ OR MONITORING VISCOSITY AND CORRESPONDING APPARATUS - A method for determining and/or monitoring the viscosity of a medium, wherein a mechanically oscillatable unit is excited to execute oscillations based on an exciter signal, and wherein oscillations are received from the mechanically oscillatable unit and transduced into a received signal. The eigenfrequency and/or resonance frequency of the mechanically oscillatable unit and/or phase relationship between the exciter signal and the received signal are/is ascertained and/or monitored, and, from changes in the eigenfrequency and/or resonance frequency and/or phase relationship, a change in viscosity is deduced and/or, based on dependencies of the oscillations on the viscosity of the medium, from the eigenfrequency and/or resonance frequency and/or phase relationship, viscosity is ascertained. In a second variant of the method, decay behavior of the mechanically oscillatable unit is evaluated. An apparatus for determining and/or monitoring viscosity is also presented. | 09-23-2010 |
20110000285 | Apparatus for Inspection of a Fluid and Method - Apparatus for inspection of a fluid comprising: a channel portion, the channel portion having a channel inlet and a channel outlet separate from the channel inlet; a piezoelectric sensor element provided at a sensor position of the channel and arranged to contact fluid flowing through the channel portion from said channel inlet to said channel outlet, the apparatus being configured to determine a difference value being a value corresponding to a difference between a resonant frequency of oscillation of said piezoelectric element at a given moment in time and a reference resonant frequency. | 01-06-2011 |
20110030455 | VIBRATING WIRE VISCOMETERS - Vibrating wire viscometers are disclosed. An example vibrating wire viscometer includes first and second electrically conductive tubes, where the first tube is at least partially inserted into the second tube, and where the first and second tubes are coupled via an electrically insulating bonding agent. The example viscometer further includes first and second electrically conductive pins inserted into respective ones of the first and second tubes, and an electrically conductive wire fastened to the first and second pins to vibrate in a downhole fluid to determine a viscosity of the downhole fluid. | 02-10-2011 |
20120111097 | RHEOMETER OR VISCOMETER - A rheometer or viscometer has a first measuring part and a second measuring part, between which a sample space for receiving a material sample is formed. By means of a drive device, at least the second measuring part can be rotated and/or can be oscillated, it being possible for the drive movement of the drive device to be transferred to the second measuring device via a transmission element. The drive device is arranged on the side of the first measuring part that is facing away from the second measuring part and the transmission element penetrates through the first measuring part, particularly at a through-bore. | 05-10-2012 |
20120144901 | MULTIVARIABLE SENSOR FOR DETERMINING AND/OR MONITORING FILL LEVEL AND DENSITY AND/OR VISCOSITY OF A LIQUID IN A CONTAINER - A multivariable sensor for determining and/or monitoring a predetermined fill level and density and/or viscosity of a liquid in a container. The sensor comprises a measuring tube provided in the container. The measuring tube has at least a first oscillatable segment and a second oscillatable segment, wherein the oscillatable segments have a cross sectional area deviating from a circularly round shape and at least one straight side, wherein on an inner wall of the oscillatable segments, driver/receiving units are placed, which cause the oscillatable segments to execute resonant oscillations. At least one control/evaluation unit is provided, which evaluates frequency and/or phase and/or amplitude of the oscillations and determines therefrom reaching of the predetermined fill level and density and/or viscosity of the liquid. | 06-14-2012 |
20120152001 | SENSOR ARRAY FOR MEASURING PROPERTIES OF FLUIDS - A sensor array for viscosity measurement includes the following: a carrier substrate formed with an opening; a metal plate-shaped oscillating element disposed on a surface of the carrier substrate and parallel to the surface over the opening; at least two metal contact electrodes disposed on the carrier substrate; at least two metal spring elements, wherein each of the contact electrodes is connected to the oscillating element by way of a spring element such that the element is mounted on the carrier substrate by way of the spring elements; and a magnet, which is disposed in the vicinity of the carrier substrate such that the magnetic field lines penetrate the plate-shaped oscillating element. | 06-21-2012 |
20120198920 | ANALYTICAL METHOD AND SENSOR - There is disclosed an analytical method and a sensor suitable for carrying out the method. More specifically, there is disclosed a method for preparing a mass sensitive chemical sensor capable of detecting binding analyte species to a surface comprising cells. | 08-09-2012 |
20120279283 | APPARATUS AND METHOD FOR OPERATING AN APPARATUS FOR DETERMINING AND/OR MONITORING AT LEAST ONE PHYSICAL PROCESS VARIABLE - A method for operating an apparatus which has an oscillatable unit. The oscillatable unit is excited to oscillate by means of a first frequency sweep within a predetermined frequency band with successive, discrete exciter frequencies of increasing or decreasing frequency. A first exciter frequency is ascertained, in the case of which, during the first frequency sweep, at least one predeterminable criterion is fulfilled. The oscillatable unit is excited by means of a second frequency sweep, wherein the frequency band, compared with the first frequency sweep, is run through in the opposite direction. A second exciter frequency is ascertained, in the case of which, during the second frequency sweep, the at least one predeterminable criterion is fulfilled. From the first exciter frequency and the second exciter frequency, via formation of an average, a measuring frequency for determining and/or monitoring at least one process variable is determined. | 11-08-2012 |
20120291528 | VISCOSITY MEASURING DEVICE AND VISCOSITY MEASURING METHOD - The oscillating velocity of an oscillating body in a fluid to be measured is positively fed back, so as to activate an actuator. The oscillating state of the oscillating body is monitored while making a velocity feedback gain increase. The velocity feedback gain when the oscillating body has oscillated is obtained as an oscillation limit gain at the oscillation limit, and this oscillation limit gain is used as a viscosity equivalent value representing viscosity of the measured fluid. | 11-22-2012 |
20130019660 | MICRO VISCOMETER - Disclosed is a micro viscometer comprising a body including an inlet where a fluid flows in, an outlet where the fluid flows out, a first chamber and a second chamber that is connected to the inlet and the outlet, respectively, a substrate and a cover that partition multiple micro channels that connect the first chamber and the second chamber; a first thin film that vibrates with the fluid within the first chamber and locates on the side of the first chamber; a second thin film that vibrates with the fluid within the second chamber and locates on the side of the second chamber; an actuating part that applies vibration onto the fluid within the first chamber by conducting vibration through the first thin film; a sensing part that senses vibration or pressure onto the fluid that transfers through the micro channels to the second thin film through vibration of the first thin film. | 01-24-2013 |
20130019661 | MICRO VISCOMETER - Disclosed is a micro viscometer comprising a first chamber and a second chamber positioned with an interval; a micro channel that connects the first chamber and the second chamber; and a first thin film and a second thin film arranged on top of the first chamber and the second chamber, respectively, wherein a height of the first chamber and second chamber are substantially identical to a half wavelength corresponding a first resonant frequency of the first thin film and the second thin film, respectively, and a width of the first chamber and the second chamber are narrower than the height of the first chamber and the second chamber. | 01-24-2013 |
20130019662 | MICRO VISCOMETER - Disclosed is a micro viscometer comprising a substrate having a first chamber and a second chamber that are positioned at intervals; a thin film disposed on the substrate to cover the first chamber and the second chamber; an actuating part that disposed on the thin film corresponding to the first chamber; and a sensing part that disposed on the thin film corresponding to the second chamber, wherein at least one main trench is formed in between the first chamber and the second chamber. | 01-24-2013 |
20130067995 | APPARATUS AND METHODS OF DETERMINING FLUID VISCOSITY - Various embodiments include apparatus and methods of determining the viscosity of a fluid downhole in a well. A parameter of a response signal, obtained from driving a tube containing a fluid with an excitation signal for vibrating the tube, can be collected while maintaining the tube in a vibrating mode. The parameter can be evaluated to measure the viscosity of the fluid. In various embodiments, the fluid viscosity may be measured in-situ downhole in the well. | 03-21-2013 |
20130139573 | RESONANT CONDUCTOR MEASUREMENT SYSTEM AND METHOD - A method of measuring properties of a fluid that uses a conductor electrically connected to a current source. A magnetic field is created about the conductor and the conductor is introduced into the fluid medium. A current waveform, having a frequency, is periodically passed through the conductor, so as to cause the conductor to move, due to force exerted on the conductor from interaction of the current and the magnetic field. The conductor movement is sensed, producing a sense signal that is amplified into an amplified sense signal. The phase relationship between the current waveform and the amplified sense signal is measured and the current waveform frequency is adjusted to create a phase lock loop. The frequency when the phase lock loop is in lock state is measured as the phase between the excitation and the measured sense signal is varied, and fluid properties are calculated from the measured frequencies. | 06-06-2013 |
20130167620 | FLUID PROPERTIES MEASUREMENT DEVICE HAVING A SYMMETRIC RESONATOR - A fluid properties measurement device includes a symmetric resonant element having a first mass and a second mass, balanced to the first mass and coupled to the first mass by a torsional spring, having a nodal support between the first mass and the second mass. Also, a chamber having at least one opening accommodates the first mass, free of mechanical constraint and a driving and sensing assembly, is adapted to drive the first mass in torsion and sense resulting torsional movement of the first mass. The torsional spring passes through the opening which is sealed about the torsional spring at the nodal support and the second mass is free to be placed into a fluid, for fluid property measurements. | 07-04-2013 |
20130186185 | Vibrating Wire Viscometers - Vibrating wire viscometers are disclosed herein. An example viscometer includes a housing defining a chamber and a wire holder disposed in the chamber. The wire holder has an elongated, electrically insulating body and a channel extending along a length of the body. A wire is at least partially disposed in the channel and coupled to the wire holder at opposing ends of the wire holder to tension the wire and electrically isolate the wire from the housing. | 07-25-2013 |
20130192349 | METHODS, DEVICES, AND SYSTEMS FOR MEASURING PHYSICAL PROPERTIES OF FLUID - Disclosed herein are devices for measuring, at one or more time points, one or more properties or changes in properties of a fluid sample. The devices may comprise a chamber defining an internal volume of the device suitable for receiving and retaining the fluid sample; a plurality of layers, the plurality comprising at least a first layer below the chamber, at least a second layer above the chamber, and a substrate layer between the first and second layers, wherein: the substrate layer is linked to at least one suspended element located within the chamber; the suspended element is linked to the substrate layer by at least two compliant structures located within the chamber; and the suspended element is configured to oscillate upon application of an actuating signal to at least one electrically conductive path, which runs across at least two of the compliant structures and the suspended element. Related methods and uses are also disclosed. | 08-01-2013 |
20130205875 | ULTRASONIC HORN ACTUATED MICROPROBES BASED SELF-CALIBRATING VISCOSITY SENSOR - An ultrasonic or acoustic viscosity sensor or viscometer is provided that can be used to accurately measure viscosity for fluid samples of less than 1 μl in volume. Methods for measuring viscosity for fluid samples of less than 1 μl in volume are also provided. The viscosity sensor and methods based thereon enable simultaneous measurement of bulk and dynamic (shear-rate dependent) viscosity of a non-Newtonian fluid. Bulk and dynamic viscosity of the non-Newtonian fluid can be measured simultaneously without separating constituents of the fluid, and thus distinguishing the effect of constituents on the viscosity. Dynamic viscosity of the non-Newtonian fluid can be estimated at varying shear rates, to study the deformability of the constituents of the fluid as a function of shear rate. | 08-15-2013 |
20130305816 | Micro Viscometers and methods of manufacturing the same - A viscometer for measuring the viscosity of fluid. The viscometer includes: a first chamber and a second chamber separated from the first chamber; a micro channel connecting the first chamber to the second chamber; a first thin film disposed over the first chamber and a second thin film disposed over the second chamber; and a first piezoelectric film disposed over the first thin film and a second piezoelectric film disposed over the second thin film. At least one of the first and second piezoelectric films has a hexagonal shape if a longest distance between a center and an edge of the piezoelectric film is longer than a threshold range and a circular shape if the distance is shorter than the threshold range. | 11-21-2013 |
20140331747 | Method for Determining and/or Monitoring Viscosity and Corresponding Apparatus - A method for determining and/or monitoring the viscosity of a medium, wherein a mechanically oscillatable unit is excited to execute oscillations based on an exciter signal, and wherein oscillations are received from the mechanically oscillatable unit and transduced into a received signal. The eigenfrequency and/or resonance frequency of the mechanically oscillatable unit and/or phase relationship between the exciter signal and the received signal are/is ascertained and/or monitored, and from changes in the eigenfrequency and/or resonance frequency and/or phase relationship, a change in viscosity is deduced and/or, based on dependencies of the oscillations on the viscosity of the medium, from the eigenfrequency and/or resonance frequency and/or phase relationship, viscosity is ascertained. In a second variant of the method, decay behavior of the mechanically oscillatable unit is evaluated. An apparatus for determining and/or monitoring viscosity is also presented. | 11-13-2014 |
20150052981 | APPARATUS AND METHOD FOR MEASURING THE VISCOSITY OF A FLUID USING ULTRASONIC WAVES - A method for measuring an ultrasonic viscosity includes applying a driving voltage to a plurality of first piezoelectric transducers provided along an outer wall circumference of a pipe at constant intervals to generate a torsional wave on a surface of the pipe, receiving the torsional wave propagated along the surface of the pipe through a plurality of second piezoelectric transducers provided along the outer wall circumference of the pipe at constant intervals while being spaced from the first piezoelectric transducers at a certain distance in a longitudinal direction of the pipe to convert the torsional wave into a voltage signal, calculating an attenuation and a propagation velocity of the torsional wave based on the time for the propagation of the torsional wave and the converted voltage signal, and measuring viscosity of the fluid in the pipe based on the calculated attenuation and propagation velocity of the torsional wave. | 02-26-2015 |
20150068290 | FLUID MECHANICAL PROPERTY MEASUREMENT METHOD AND MEASUREMENT DEVICE - An object is to measure a mechanical property of a fluid at a temporal resolution of at least 100 [μs]. Therefore, a method comprising: causing a droplet | 03-12-2015 |
20150082873 | Resonant Sensors For Fluid Properties Measurement - A resonator that includes an elastic tube defining an interior surface and a conductor threaded through the elastic tube. Solid material fills space between the conductor and the elastic tube interior surface, such that motion of the conductor is directly transferred to the elastic tube. In a preferred embodiment, the elastic tube | 03-26-2015 |
20160025609 | Method of Acquiring Viscosity of A Downhole Fluid in A Downhole Tool with A Vibrating Wire Viscometer - A method of acquiring viscosity of a downhole fluid is provided. The downhole fluid is in a downhole tool positionable in a wellbore penetrating a subterranean formation. The method involves obtaining a viscosity signal of the downhole fluid using a vibrating wire viscometer of the downhole tool, and acquiring viscosity parameters of the viscosity signal. The acquiring involves adjusting the viscosity signal by removing offsets from the viscosity signal, generating a complex signal from the adjusted viscosity signal, obtaining a low frequency component of the complex signal by filtering the complex signal into a high frequency component and the low frequency component and removing the high frequency component, and determining the viscosity parameters from the low frequency component. | 01-28-2016 |
20160061708 | VIBRATORY SENSOR AND METHOD OF VARYING VIBRATION IN A VIBRATORY SENSOR - A vibratory sensor ( | 03-03-2016 |
20160131566 | SYSTEM AND METHOD OF MONITORING VISCOSITY OF FLUID IN REAL-TIME - A method of monitoring a quality of a fluid includes maintaining distinct temperatures in at least three different locations along a flow path of the fluid. The method also includes determining viscosity values of the fluid in the at least three different locations along the flow path. The method further includes determining a viscosity-temperature plot based on the viscosity values determined from the at least three different locations and determining a viscosity index of the fluid from the viscosity-temperature plot. | 05-12-2016 |
20160161388 | Measurement System with Resonant Sensors and Method for the Operation of a Resonant Sensor - A method to operate a resonator is provided herein. As illustrated with an example, the resonator is excited by means of a periodic excitation signal with an integer number of at least two signal components with one specified frequency each. A response signal of the resonator is determined at the specified frequencies of the at least two signal components of the excitation signal. Eventually, parameters of a model illustrating the behavior of the resonator as a function of the response signal are calculated based on the response signal. | 06-09-2016 |