Class / Patent application number | Description | Number of patent applications / Date published |
073779000 | Magnetic or inductive | 40 |
20080223145 | ELECTROMAGNETIC ROTATION AND STABILITY APPARATUS - A test machine for testing the physical properties of a test specimen is provided. The test machine includes a fixture that applies a first force on the test specimen in a first direction and utilizes magnetic force to bring about the rotation of a fixture to apply a second force on the test specimen in a second direction. The test machine can better simulate field applications where a material may experience, for example compression or tension at the same time it experiences a rotational moment. | 09-18-2008 |
20090013794 | NON-DESTRUCTIVE EVALUATION VIA MEASUREMENT OF MAGNETIC DRAG FORCE - Sensors for outputting signals indicative of a magnetic drag force between a ferromagnetic sample that is or has been in motion relative to one or more measurement magnets are described. Such sensors include at least one measurement magnet and a sensing element operably associated therewith, such that upon or after exposure of the measurement magnet(s) to a ferromagnetic sample in motion relative thereto, the sensor can sense the drag force, if any, or changes therein, experienced by the measurement magnet. Devices for detecting and/or measuring magnetic drag force that employ one or more of these sensors are also described, as are various applications for such devices. | 01-15-2009 |
20090013795 | TORQUE SENSOR - A change in a magnetic resistance generated between a plurality of windows | 01-15-2009 |
20090107247 | Magnetostrictive pressure sensor with an integrated sensing and sealing part - In one embodiment a sensor assembly has a magnetostrictive (MR) element in a sensor housing. The MR element has a sensing part engaged with a wire coil and a frusto-conical sealing part juxtaposed with a fluid the pressure of which is to be sensed. | 04-30-2009 |
20090107248 | Magnetostrictive sensor with uniform stress - In one embodiment, a sensor assembly has a sensor housing forming a fluid chamber having a surface defining a normal axis. A magnetostrictive (MS) core that defines a central longitudinal axis is subjected to stress induced by pressurized fluid in the chamber. An excitation coil is coupled to the core to induce a magnetic flux therein. The central longitudinal axis of the core is coaxial with the axis normal to the fluid chamber surface. | 04-30-2009 |
20090107249 | Means and method of sensing pressure using magnetostrictive electrical condutors - In one embodiment, a sensor assembly has a sensor housing forming a fluid chamber and a magnetostrictive wire that undergoes stress induced by fluid in the chamber. The wire defines opposed ends, each being associated with a respective terminal. Respective hermetic seals penetrate the housing and are coupled to the respective terminals. | 04-30-2009 |
20090145239 | Strain sensing means and methods - A strain gauge including: a system including a transmission coil, a magnetostrictive material layer and a receiver coil wherein an alternating transmission signal is applied across the transmission coil and an induced signal is induced in the receiver coil, the intensity of the detected signal across the receiver coil being a measurement of strain, wherein frequency of transmission signal is near to a resonance frequency of the system. | 06-11-2009 |
20090217767 | Measurement of Stress in Coatings Using a Piezoelectric Actuator - Device and method for determining mechanical stresses in a substrate coating has a substrate holder and actuating element configured as a piezoelectric actuator moveable at least partially in relation to the holed. The actuating element mechanically prestresses the substrate by applying an electric starting voltage to the piezoelectric actuator to cause the actuating element to be partially displacement by a predetermined and/or determinable starting displacement relative to the holed. A coating is applied to a deposition area of the substrates and a change in displacement of the actuating element is determined. | 09-03-2009 |
20100005896 | MEASUREMENT OF STRAIN IN AN ADHESIVELY BONDED JOINT INCLUDING MAGNETOSTRICTIVE MATERIAL - Sensing strain in an adhesively bonded joint includes inducing a strain wave in the joint, and sensing a change in local magnetic characteristics in the joint. | 01-14-2010 |
20100154556 | Strain Guage and Fracture Indicator Based on Composite Film Including Chain-Structured Magnetically Active Particles - The disclosed subject matter provides a strain gauge which includes a composite film including a non-metallic matrix and magnetically active particles. At least a portion of the magnetically active particles form one or more chain structures, such that the resistivity of the composite film can vary in response to an applied strain on the composite film. The strain gauge also includes two or more leads affixed to the composite film and electrically coupled with the chain structures. Methods of fabrication and methods of use of the strain gauge based on chain-structured magnetically active particles included in a non-metallic matrix are also disclosed. | 06-24-2010 |
20100192698 | SEAT SENSOR APPARATUS FOR OCCUPANT PRESENCE DETECTION - An occupant presence sensor apparatus disposed in a seat includes first and second substantially non-compliant force translation plates generally parallel to the seating surface of the seat, an elastomeric mat disposed between the first and second force translation plates, and a switch mechanism disposed between the first and second force translation plates within an opening formed in the elastomeric mat. The elastomeric mat includes a distributed array of hollow protuberances that extend toward and contact the force translation plates, and the mat has a stiffness that normally provides a clearance between the switch mechanism and one of the force translation plates. When an occupant of specified or higher weight sits on the seating surface, the protuberances collapse and the force translation plates activate the switch mechanism. | 08-05-2010 |
20110023620 | STRAIN SENSOR - Improved microwire strain sensor elements ( | 02-03-2011 |
20110232392 | Wireless Sensor for Measuring Mechanical Stress - The invention relates to a sensor ( | 09-29-2011 |
20110259113 | MAGNETIC SUSPENSION SUPPORTER OF DIRECT TENSION TEST APPARATUS - A magnetic suspension supporter for a direct tension test apparatus, includes an upper end cap and a lower end cap for fixing a sample, an upper chain and a lower chain connected to the upper and lower end caps respectively, an upper joint and a lower joint connected to the other ends of the upper and lower chains respectively, the lower joint being fixed to the test machine foundation. In addition, the upper and lower end caps, the upper and lower chains, the upper and lower joints as well as the supporter having a common vertical axis and being arranged in a cascade form, characterized in that a sample supporter is arranged between the lower end cap and the test machine foundation. The sample supporter is composed of a pair of upper magnet provided at the underside of the lower end cap and lower magnet on the upside of the test machine foundation, which constitute two magnets structure. The polarity directions of the two magnets are reversed and the same polarity is arranged oppositely on the axis. The following technical effect is realized: sudden breaking caused by the gravity when peak stress is reached may be prevented; the magnet is fixed to the axis, which may prevent the sample from being destroyed at the end portion due to the left and right swaying of the spring, ensuring accuracy of the test data. | 10-27-2011 |
20110271765 | Method and apparatus for the detection of defects in the raceways of bearing shells and in the rolling elements of ceramic hybrid bearings - This invention relates to a method and an apparatus for the detection of defects in the raceways of bearing shells and the rolling elements of ceramic hybrid bearings. In order to enable the detection of such defects without falsifying the measuring values of the ceramic hybrid bearings installed, the present invention provides that the outer or inner ferromagnetic bearing shell (outer ring | 11-10-2011 |
20120079887 | STRAIN SENSOR ELEMENT AND BLOOD PRESSURE SENSOR - A strain sensor element comprises a laminated film which has a magnetic free layer, a spacer layer, and a magnetic reference layer. The free layer has a variable magnetization direction and a out-of-plane magnetization direction. The reference layer has a variable magnetization direction which is pinned more strongly than the magnetization of the free layer. The spacer layer provided between the free layer and the reference layer. A pair of electrodes is provided with a plane of the laminated film. A substrate is provided with either of the pair electrodes and can be strained. The rotation angle of the magnetization of the free layer is different from the rotation angle of the magnetization of the reference layer when the substrate is distorted. Electrical resistance is changed depending on the magnetization angle between the free layer and the reference layer, which allows the element to operate as a strain sensor. | 04-05-2012 |
20120222489 | METHOD AND DEVICE FOR ASCERTAINING THE DEFORMATION OF A FUEL ASSEMBLY IN A PRESSURIZED-WATER REACTOR - A method and a device measure for a deformation of a fuel element of a pressurized water reactor having a plurality of control rod guide tubes. A probe displaceable in the direction of the longitudinal axis of the control rod guide tube is inserted in the interior of at least one control rod guide tube having at least one reference axis, and supported in at least one section of the control rod guide tube on the interior wall thereof, such that the orientation of the at least one reference axis is unambiguously a function of the orientation of the longitudinal axis of the control rod guide tube in the section. The orientation of the at least one reference axis in the section of the control rod guide tube is determined relative to the orientation of the or a further reference axis of the probe in a different section. | 09-06-2012 |
20130074606 | DEVICE AND METHOD FOR INDICATING IF A FASTENING ELEMENT HAS REACHED A TENSILE YIELD LIMIT LOAD - A device and method for indicating if a fastening element upon fastening to a piece has reached a tensile yield limit load. The fastening element includes a threaded shaft having a magnetostrictive material. The device includes a mechanism for generating an alternating magnetic field that penetrates the shaft, a mechanism for measuring a physical quantity that depends on the momentary magnetic susceptibility of the shaft and a control unit adapted to detect a significant change of the physical quantity and determine and indicate if the shaft of the fastening element has reached the tensile yield limit load. | 03-28-2013 |
20130081475 | ARRAY FOR SENSING AND INDUCING STRAIN IN AN ADHESIVELY BONDED JOINT INCLUDING MAGNETOSTRICTIVE MATERIAL - Sensing strain in an adhesively bonded joint includes inducing a strain wave in the joint, and sensing a change in local magnetic characteristics in the joint. | 04-04-2013 |
20130091954 | SENSOR DEVICE - An apparatus for sensing strain or stress includes a body including magnetic shape-memory alloy (MSMA) material, having a first axis. A first drive coil and first sensor coil are wound around the body about the first axis. The drive coil is coupled to a power source and configured to generate an alternating magnetic field on the body. The first sensor coil is configured to detect changes in inductance of the body due to changes in magnetic permeability of the body with deformation thereof. | 04-18-2013 |
20130255393 | PRESSURE SENSOR AND MICROPHONE - According to one embodiment, a pressure sensor includes a base, and a first sensor unit. The first sensor unit includes a first transducer thin film, a first strain sensing device and a second strain sensing device. The first strain sensing device includes a first magnetic layer, a second magnetic layer, and a first intermediate layer provided between the first and the second magnetic layers. The second strain sensing device is provided apart from the first strain sensing device on the first membrane surface and provided at a location different from a location of the barycenter, the second strain sensing device including a third magnetic layer, a fourth magnetic layer, and a second intermediate layer provided between the third and the fourth magnetic layers, the first and the second intermediate layers being nonmagnetic. The first and the second strain sensing devices, and the barycenter are in a straight line. | 10-03-2013 |
20140137658 | MICROPHONE PACKAGE - According to one embodiment, a microphone package includes: a pressure sensing element including a film and a device; and a cover. The film generates strain in response to pressure. The device includes: a first electrode; a second electrode; and a first magnetic layer. The first magnetic layer is provided between the first electrode and the second electrode and has a first magnetization. The cover includes: an upper portion; and a side portion. The side portion is magnetic and provided depending on the first magnetization and the second magnetization. | 05-22-2014 |
20140165737 | METHOD AND MEASURING DEVICE FOR INVESTIGATING A MAGNETIC WORKPIECE - A method for investigating a magnetic workpiece ( | 06-19-2014 |
20140174191 | ENHANCED DEVICE FOR DETERMINING THE LOCATION OF INDUCED STRESS IN STUCK BOREHOLE TUBULARS - A method for identifying the location of a binding zone between a stuck tubular and a borehole includes the steps of passing a demagnetizing stress sensor through the tubular on a baseline magnetization pass to magnetize the tubular. Next, the demagnetizing stress sensor measures a baseline magnetization of the tubular. Once the baseline magnetization has been established, the method continues by applying a stress to the tubular and passing the demagnetizing stress sensor through the tubular on a scanning pass while the tubular is stressed. The demagnetizing stress sensor then measures a stress-induced magnetization of the tubular. The method concludes by comparing the baseline magnetization of the tubular against the stress-induced magnetization of the tubular. Notably, in preferred embodiments, the method includes the magnetization of the tubular in a substantially radial direction and the stresses are applied in vectors perpendicular to the radial magnetization of the tubular. | 06-26-2014 |
20140182388 | PROXIMITY AND STRAIN SENSING - There is set forth herein a method comprising applying a drive signal to a drive element in a sensor assembly having a drive element and one or more sensor element so that responsively to the drive signal the drive element generates a magnetic flux that travels through a target, determining a strain of the target using a picked up output signal picked up by the one or more sensor element. In one embodiment, a sensor assembly can be employed for detecting a proximity of the target using a picked up output signal picked up by e.g., the drive element. In one embodiment, a drive signal can have a plurality of frequency components. | 07-03-2014 |
20140182389 | Method and Apparatus for Detection and Characterization of Mechanical Damage - Yield stress is an important indicator of the strength of a component such as a pipe section. A method and apparatus for measuring yield stress of components made from magnetic materials is provided. The magnetic permeability of the material is recorded at multiple stress levels below yield establishing a permeability-stress relationship. The yield stress is then estimated as a function of the recorded permeability-stress relationship. The permeability stress relationship may be non-linear for a range of stress levels, achieving a peak permeability response for a stress below yield. The yield stress may be estimated as a multiple of the stress at which the peak permeability response is recorded. | 07-03-2014 |
20140251023 | CHEWING MONITORING DEVICE - The device for tracking masticatory movements makes it possible to calculate the number of masticatory movements. The device comprises a housing capable of elastic deformation under the action of the temporal and/or masseter muscles, a Hall sensor and a permanent magnet, which are mounted inside the housing with the possibility of shifting with respect to one another upon elastic deformation of the housing. The housing of the device can be designed such that it can surround the concha of the auricle of the user or such that it can be fitted in the concha of the auricle of a user. | 09-11-2014 |
20140298916 | STRESS MONITORING DEVICE OF ELASTO-MAGNETO-ELECTRIC (EME) EFFECT TYPE - A stress monitoring device of elasto-magneto-electric (EME) effect type, for monitoring stress of a structural component of ferromagnetic materials, includes a magnetic field generating unit, a magneto-electric (ME) sensing unit, a support skeleton, and a signal controlling and conditioning instrument. Under the control of the signal controlling and conditioning instrument, the magnetic field generating unit generates a magnetic field for magnetizing the structural component. The ME sensing unit outputs an electrical signal V | 10-09-2014 |
20140360282 | Magneto-Elastic Sensor, Load Pin, Ball-Joint And Tow Coupling Comprising This Sensor, Method Of Determining A Direction Of A Load Vector - A magneto elastic sensor having a longitudinally extending shaft like member which is subject to a load, is provided. A magneto-elastically active region is directly or indirectly attached to or forming a part of the member in such a manner that the mechanic stress is transmitted to the active region. A magnetically polarized region of the active region becomes increasingly helically shaped as the application stress increases. A magnetic field sensor means is arranged approximate the at least one magneto elastically region for outputting a signal corresponding to a stress induced magnetic flux emanating from the magnetically polarized region. The magnetic sensor means is configured for determination of a shear stress and/or of a tensile or compressive stress. In particular, the sensor means comprises at least one direction sensitive magnetic field sensor, which is arranged having a predetermined and fixed spatial coordination with the member. | 12-11-2014 |
20140366637 | MAGNETO-ELASTIC FORCE SENSOR AND METHOD FOR COMPENSATING DISTANCE DEPENDENCY IN A MEASUREMENT SIGNAL OF SUCH A SENSOR - A magneto-elastic force sensor includes a sensor head ( | 12-18-2014 |
20150047437 | PRESSURE SENSOR AND MICROPHONE - According to one embodiment, a pressure sensor includes a base, and a first sensor unit. The first sensor unit includes a first transducer thin film, a first strain sensing device and a second strain sensing device. The first strain sensing device includes a first magnetic layer, a second magnetic layer, and a first intermediate layer provided between the first and the second magnetic layers. The second strain sensing device is provided apart from the first strain sensing device on the first membrane surface and provided at a location different from a location of the barycenter, the second strain sensing device including a third magnetic layer, a fourth magnetic layer, and a second intermediate layer provided between the third and the fourth magnetic layers, the first and the second intermediate layers being nonmagnetic. The first and the second strain sensing devices, and the barycenter are in a straight line. | 02-19-2015 |
20150068316 | SENSOR ARRANGEMENT COMPRISING A CARRIER SUBSTRATE AND A FERROELECTRIC LAYER AND METHOD FOR PRODUCING AND USING THE SENSOR ARRANGEMENT - A sensor array comprises a carrier substrate and a ferro electric layer disposed on the carrier substrate, wherein the sensor array comprises means for reading the permittivity of the ferro electric layer. The sensor array is such that the ferro electric layer is disposed in a crystalline manner on the carrier substrate. A method for producing the sensor array and to use of the same is also disclosed. | 03-12-2015 |
20150082899 | STRAIN SENSING ELEMENT, PRESSURE SENSOR, MICROPHONE, BLOOD PRESSURE SENSOR, AND TOUCH PANEL - According to one embodiment, a strain sensing element provided on a deformable substrate, includes: a first magnetic layer; a second magnetic layer; and an intermediate layer. The second magnetic layer includes Fe | 03-26-2015 |
20150082900 | STRAIN SENSING ELEMENT, PRESSURE SENSOR, MICROPHONE, BLOOD PRESSURE SENSOR, AND TOUCH PANEL - According to one embodiment, a strain sensing element to be provided on a deformable substrate, the element includes: a reference layer; a magnetization free layer; and a spacer layer. Magnetization of the magnetization free layer changes in accordance with deformation of the substrate. The spacer layer is provided between the reference layer and the magnetization free layer. The magnetization free layer has: a first magnetic layer; a second magnetic layer; and a magnetic coupling layer. The first magnetic layer is provided in contact with the spacer layer. The second magnetic layer is provided to be separated from the first magnetic layer. The magnetic coupling layer is provided between the first magnetic layer and the second magnetic layer. Magnetization of the first magnetic layer is anti-parallel to magnetization of the second magnetic layer. | 03-26-2015 |
20150082901 | STRAIN SENSING ELEMENT, PRESSURE SENSOR, MICROPHONE, BLOOD PRESSURE SENSOR, AND TOUCH PANEL - According to one embodiment, a strain sensing element provided on a deformable substrate includes: a first magnetic layer; a second magnetic layer; a spacer layer; and a bias layer. Magnetization of the second magnetic layer changes according to deformation of the substrate. The spacer layer is provided between the first magnetic layer and the second magnetic layer. The second magnetic layer is provided between the spacer layer and the bias layer. The bias layer is configured to apply a bias to the second magnetic layer. | 03-26-2015 |
20150090044 | FLEXIBLE DEVICE AND BENDING DETECTION APPARATUS THEREFOR - A bending detection apparatus for a flexible device includes a plurality of antennas disposed to be bent together with a flexible device; and a bending detection unit for detecting bending of the flexible device based on inductances of the plurality of antennas or information corresponding to the inductances, a bending detection method for a flexible device, and a flexible device. | 04-02-2015 |
20150122044 | MAGNETOELASTIC STRAIN SENSOR - A strain sensor having an active area that includes a magnetoelastic resonator and spring configured so that the spring undergoes a greater amount of strain than the resonator when the sensor is under load. The sensor is anchored at opposite ends of the active area to a substrate for which strain is to be measured. An interrogating coil is used for wireless sensor readout. A biasing magnet may be included to provide a desired sensor response for the particular application of the sensor. The strain sensor may be implemented as a differential strain sensor that includes a second, strain-independent reference resonator. | 05-07-2015 |
20150323397 | Compensation methods for active magnetic sensor systems - Active Force measuring device for measuring a force impact onto a ferromagnetic object comprising a flux concentrator having a first and second ends facing the ferromagnetic object to me measured, a magnetic field generation coil arrangement being wound around the flux concentrator, wherein the magnetic field generating coil arrangement is adapted for generating a magnetic field having a main generating direction between the first end and the second end, and a magnetic field sensing arrangement, wherein the magnetic field sensing arrangement is arranged between the first end and the second end. | 11-12-2015 |
20150377720 | Analysis of Stimulus by RFID - The present invention is directed to a stimulus monitoring system. The system includes an RFID device, item, interrogation device, and reception device. The RFID device includes a brace affixed to an inductor or capacitor. The brace is constructed from a material structurally responsive to a predetermined stimulus, such that stimulus-responsive structural alterations to the brace structurally alters the inductor, capacitor, or other RFID subcomponent of the RFID circuit capable of generating a current alteration, which in turn alters the signal frequency of the RFID. | 12-31-2015 |
20160161242 | NON-CONTACT STRAIN MEASUREMENT - Non-contact strain measurement systems and their method of use to detect strain on rotating components are disclosed. A non-contact strain measurement system comprises magnetic materials plated onto a rotatable component in addition to appropriate encoders and controller. The magnetic materials are spaced apart a first distance D | 06-09-2016 |