Abstract: A flexible tactile sensor includes a conductive target positioned in a first plane, at least three coils forming an array within a second plane, the second plane spaced apart from the first plane, a pliable material coupling the conductive target to the at least three coils, and an electronic device electrically coupled to each of the at least three coils, the electronic device configured to induce an AC signal within each of the at least three coils and measure a change in inductance in the at least three coils in response to movement of the conductive target.

Abstract: A method includes depositing a first metal layer on a semiconductor substrate; etching the first metal layer to form a first electrode having a first lead; depositing a piezoelectric layer on the semiconductor substrate and first electrode; etching the piezoelectric layer to a shape of the gyrator to be formed within the circulator; depositing a second metal layer on the piezoelectric layer; etching the second metal layer to form a second electrode having a second lead, the second electrode being positioned opposite the first electrode, wherein the first lead and the second lead form an electrical port; depositing a magnetostrictive layer on the second electrode; etching the magnetostrictive layer to approximately the shape of the piezoelectric layer; depositing a third metal layer on the magnetostrictive layer; and etching the third metal layer to form a metal coil that has a gap on one side to define a magnetic port.

Abstract: The present invention belongs to the field of processing residual stress, and discloses a method for calculating processing parameters for residual stress control by parameter inversion. This method comprises: (a) extracting a characteristic index reflecting the residual stress distribution characteristic from a residual stress distribution curve; (b) respectively presetting initial values of processing parameters for residual stress control, calculating an initial value of the characteristic index, and drawing curves of the characteristic index over the respective processing parameters to obtain respective fitted curves; (c) respectively establishing a relation formula between respective characteristic index increment of the processing parameters and the fitting curve; and (d) assigning the values and performing inversion calculation to obtain the required processing parameters.

Abstract: A sensor for sensing stress in a ferromagnetic material includes a non-magnetic substrate. The substrate has a first surface and a second surface opposite the first surface. A first coil is attached to or formed on the first surface of the substrate. The first coil is configured to induce a magnetic flux in the ferromagnetic material being driven by an alternating current (AC) signal. At least one second coil is attached to or formed on the first surface of the substrate. The at least one second coil is spaced from the first coil. In addition, the second coil is configured to detect changes in the magnetic flux induced in the ferromagnetic material.

Abstract: In order to inexpensively measure torque on a shaft such that the measurement is as independent as possible from distance changes or material inconsistencies of the shaft around the circumference thereof, the invention provides a torque transmitter for a torque sensor for measuring a torque on a shaft, having a carrier plate that has a plurality of sensor element carrier plate regions, on each of which at least one sensor element for recording magnetic field changes, caused by the magnetoelastic effect, is arranged, and at least one enclosure region that is designed to at least partly enclose the shaft around the circumference of the shaft, wherein at least one flexible connection region is provided by way of which at least one of the sensor element carrier plate regions is able to be pivoted relative to another sensor element carrier plate region or relative to the at least one enclosure region.

Abstract: Control method for a dust extraction module (2) for a chiseling tool (5), including the following steps: using a fan (18) of the dust extraction module (2) to draw in an air flow Q from a certain place of a substrate (31) being worked by the tool (5), using a material detector (24) to identify the material M at the place of the substrate being worked by the tool (5), and adapting the suction power of the dust extraction module (2) as a function of the identified material M in order to set the air flow Q. The air flow Q is greater than or equal to a rated value Qo in the case of an iron-free mineral material M1, whereas the air flow Q is less than the rated value Qo in the case of a material M2 containing iron.

Abstract: A method for identifying the magnetic anisotropy of an electric rotary field machine comprising a rotor and a stator is described, the method comprising the steps of setting injection pulses of equal absolute values during an injection interval, detecting a respective current response in form of current difference vectors, and determining the anisotropy from the voltage vectors and current difference vectors. Such a method should allow identifying of magnetic anisotropy in a simple way. To this end, injection pulses in the three-phase domain are used.

Abstract: A system and a method for a torque measurement system for a vehicle having a rotatable member connecting an engine to a torque converter and rotatable about a rotating axis, the torque measurement system including a strain measuring module arranged to measure the strain on the rotatable member; a control module arranged to process the data associated with the strain measurement; and an energy generating module arranged to generate electricity through the movement of the rotatable member, thereby powering the torque measurement system.

Abstract: There is provided a method for measuring a contact force applied to each tube constituting a tube bundle disposed in a fluid from a vibration damping member by using a probe inserted into each tube. Characteristic data defining a relationship between a value measured by the probe and the contact force is previously prepared. Then, the probe is inserted into the tube, and the contact force is calculated using the measurement value of the probe, based on the characteristic data.

Abstract: The invention relates to a magnetic force sensor (100), having at least one conducting track (111, 211) of soft magnetic material, wherein the at least one conducting track (111, 211) has at least one interruption (130) having a distance (A), wherein the force sensor (100) is arranged on a substrate, in particular on a component (1, 2) to be monitored, and a change in the distance (A) or rather a change in the magnetic flux in the at least one magnetic conducting track (111, 211) is monitored.

Abstract: A system for monitoring a crack in a structural member includes a first fixable component having a first plate defining a top surface and a bottom surface. The first plate is at least partially transparent in at least a first area thereof, and the first fixable component further includes a mounting surface disposed away from the bottom surface of the plate. The system also includes a second fixable component having a second plate defining a top surface and a bottom surface defining a mounting area thereon. A distance between the mounting surface and the bottom surface of the first plate is greater than a thickness of the second plate defined between the top and bottom surfaces thereof. A measurement array and a pair of orthogonal crosshairs are disposed on respective ones of the first plate within the at least partially transparent area and the second plate.

Abstract: Disclosed is a method for determining internal uniaxial stress of steel members based on transverse wave phase spectrum, including: manufacturing a replicated steel member of an in-service steel structure member, where the replicated steel member and the in-service steel structure member are the same in material and thickness; loading a test on the replicated steel member to obtain two stress-spectral parameters; performing ultrasonic determination on the in-service steel structure member using an ultrasonic determination device; and collecting transverse wave signals using a signal acquisition system; processing the collected transverse wave signals through an information processing device to obtain a derived curve of the phase spectrum; capturing a first response frequency of the phase spectrum from the phase spectrum derived curve; and obtaining a uniaxial stress of the in-service steel structure member according to the stress-spectral parameters.

Abstract: A torque sensor assembly comprises a shaft configured to receive an applied torque. The shaft comprises at least one region, which is magneto-elastic and configured to generate a magnetic field in response to the applied torque. A pair of sensing coils disposed adjacent to the region is configured to sense the magnetic field. One or more sensors sense a temperature of each of the sensing coils. A controller is coupled to the pair of sensing coils and the sensor(s). The controller is configured to receive the sensed temperature of each of the sensing coils, determine a temperature difference between the sensing coils and generate an output signal based on the sensed magnetic field. The output signal accounts for the temperature difference between the sensing coils.

Abstract: According to one embodiment, a sensor includes a film portion, one or more detectors fixed to the film portion, and a processor. The detector includes first and second detecting elements. The first detecting element includes a first magnetic layer. The second detecting element includes a second magnetic layer. A first change rate of a first signal is higher than a second change rate of the first signal. The first signal corresponds to a first electrical resistance of the first detecting element. A change rate of a second signal with respect to the change of the magnitude of the strain is higher than the second change rate. The second signal corresponds to a second electrical resistance of the second detecting element. The processor is configured to perform at least a first operation of outputting a second value. The second value is based on the second signal and a first value.

Abstract: To provide a surface characteristics evaluation method that evaluates the residual stress in a subject made of steel material subjected to a surface modification treatment. A surface characteristics evaluation method includes a step of preparing a surface characteristics evaluation apparatus, a step of placing the subject in such a manner that an alternating magnetic field induced by a coil of the surface characteristics evaluation apparatus permeates into the steel material, a step of generating an eddy current in the subject, a step of successively changing the alternating magnetic field applied to the coil, a step of calculating the impedance Z1 for each of different frequencies from the potential difference across the coil and the value of the current flowing through the coil, a step of performing computation based on the impedance Z1, and a step of evaluating the residual stress in the steel material based on the computation result.

Abstract: A magnetoelastic resonator device comprises a housing, at least one elliptically-shaped or substantially elliptically-shaped magnetoelastic element disposed within the housing, and at least one bias magnet disposed in the housing, wherein the at least one elliptically-shaped or substantially elliptically-shaped magnetoelastic element is configured to couple to an external magnetic field at a particular frequency and convert the magnetic energy into mechanical energy, in the form of oscillations.

Abstract: A system is for determining a viscoelastic property of a flexible seal, such as for use in connection with a vessel having a junction formed between first and second rigid parts that serve to compress the seal in use. A magnetic material is coupled to the flexible seal, and a generator such as an electric coil is provided for generating a magnetic field for causing the magnetic material to output a signal representative of a dynamic mechanical response of the magnetic material. A sensor senses the signal. An analyzer may be provided for analyzing the signal to determine the viscoelastic property of the object. Flexible seals with one or more embedded permanent magnets are disclosed, as are a method and apparatus for manufacturing such a seal using superconductive levitation to position a magnetic material, such as a permanent magnet, in a mold cavity during injection of a molding material.

Abstract: According to one embodiment, a strain sensing element includes a film unit being deformable, a first and a second magnetic unit, and a strain sensor. The first magnetic unit is provided on the film unit and is arranged with the film unit in a first direction. The first magnetic unit includes a first magnetic body layer and a first intermediate magnetic layer. The second magnetic unit is provided on the film unit and is arranged with the first magnetic unit in a second direction crossing the first direction. The second magnetic unit includes a second magnetic body layer and a second intermediate magnetic layer. The strain sensor is provided on the film unit between the first magnetic unit and the second magnetic unit. An electrical characteristic of the strain sensor changes according to a deformation of the film unit.

Abstract: Disclosed is a wafer inspection apparatus. The wafer inspection apparatus includes: a magnetic field generating unit forming a magnetic field such that magnetic lines of force flow in a direction perpendicular or parallel to a first surface of a wafer on which a magnetic thin film is formed; a microwave guide unit emitting microwaves to a measurement region that is at least a partial region of the wafer and is a region affected by the magnetic field generated by the magnetic field generating unit; and a sensing unit receiving waves reflected or transmitted after the microwaves are emitted to the measurement region from the microwave guide unit.

Abstract: An apparatus is provided to measure a depth of a hardened layer formed at a surface layer of a quenched workpiece. The apparatus includes an exciting coil configured to generate a magnetic flux to magnetize the workpiece and a detecting coil configured to detect the magnetic flux generated by the exciting coil. The exciting coil has a U-shaped excitation core portion and an excitation coil portion wound on the excitation core portion. The excitation core portion is arranged such that distal ends of magnetic poles of the excitation core portion face the workpiece. The detecting coil has a detection core portion and a detection coil wound on the detection core portion. The detection core portion is arranged between the magnetic poles of the excitation core portion and along a surface of the workpiece.

Abstract: A tester for bonded composite materials uses a magnetic source to generate a response signal from wires infused in an adhesive used between layers of the composite material. Acoustic or magnetic response signals, separately or in combination, can be received and analyzed to detect stresses in wires indicative of voids in the adhesive or other defects affecting the bond quality between layers of the composite material.

Abstract: A sensor for sensing stress in a ferromagnetic material includes a non-magnetic substrate. The substrate has a first surface and a second surface opposite the first surface. A first coil is attached to or formed on the first surface of the substrate. The first coil is configured to induce a magnetic flux in the ferromagnetic material being driven by an alternating current (AC) signal. At least one second coil is attached to or formed on the first surface of the substrate. The at least one second coil is spaced from the first coil. In addition, the second coil is configured to detect changes in the magnetic flux induced in the ferromagnetic material.

Abstract: A building structure includes a block of building material and a magnetic circuit buried in the block of building material. The structure also includes a plurality of sensing devices buried in the block of building material. Each sensing device may include a contactless power supplying circuit magnetically coupled with the magnetic circuit to generate a supply voltage when the magnetic circuit is subject to a variable magnetic field.

Abstract: A force measurement device may include a first magnetic field generating unit configured to generate a magnetic field for being applied to a test object; a first magnetic field sensing unit configured to sense the generated magnetic field; and a flux concentrator having a first pole, a second pole and a third pole. The first pole, the second pole and the third pole extend in the same direction. The first magnetic field generating unit is arranged at the first pole. The first magnetic field sensing unit is arranged at the second pole. A line enveloping a first end face of the first pole, a second end face of the second pole and a third end face of the third pole is concave shaped. A cross section of the first pole is greater than a cross section of the second pole and greater than a cross section of the third pole.

Abstract: A medical treatment or examination device includes at least one device component that may move relative to at least one other device component via a drive device. A measuring device is provided for detecting a load acting on the movable device component. The measuring device includes a support that bends due to the load. The support, at least in a bending region, has a section producing a magnetic field. The measuring device also includes at least one coil that is assigned to the section and in which the magnetic field undergoing a change as a result of bending due to a load induces an induction current that serves as measurement signal describing the load.

Abstract: 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.

Abstract: A system for monitoring a component is provided. The system may include a strain sensor configured on the component, an electrical field scanner for analyzing the strain sensor, and a processor in operable communication with the electrical field scanner. The processor may be operable for measuring an electrical field value across the strain sensor along a mutually-orthogonal X-axis and Y-axis to obtain a data point set. The processor may further be operable for assembling a field profile of the strain sensor based on the data point set. Methods of using the system are also provided.

Abstract: An automated magnet quality measurement system includes a magnet measuring component and an automated magnet moving component. The magnet measuring component can be configured to measure EMF for a plurality of magnets. The automated magnet moving component can move each of the plurality of magnets into and out of the magnet measuring component without requiring any manual intervention, with only one of the plurality of magnets being within the magnet measuring component at a given time. The magnet measuring component can be a Helmholtz coil and the automated magnet moving component can be a rotating disk. The overall system can also include a loading system configured to load each of the magnets onto the automated magnet moving component on an individual and sequential basis, and a sorting system configured to sort the magnets based upon their EMF measurements.

Abstract: The present invention relates to an arrangement for measuring a force and/or a torque on a machine element extending in an axis, using the inverse magnetostrictive effect. The machine element has at least one permanent magnetization. The permanent magnetization extends along a closed magnetization path. The magnetization path runs preferably at least partially along the surface of the machine element. The arrangement further includes at least one magnetic field sensor which is arranged opposite the machine element. The magnetic field sensor serves to determine a magnetic field and is designed to measure at least one vector component of a magnetic field coming from the machine element, which field is produced on the one hand by the permanent magnetization and on the other hand by the force and/or by the torque. According to the invention, the orientation of the permanent magnetization relative to the axis changes along the magnetization path.

Abstract: According to one embodiment, a strain sensing element includes a film unit being deformable, a first and a second magnetic unit, and a strain sensor. The first magnetic unit is provided on the film unit and is arranged with the film unit in a first direction. The first magnetic unit includes a first magnetic body layer and a first intermediate magnetic layer. The second magnetic unit is provided on the film unit and is arranged with the first magnetic unit in a second direction crossing the first direction. The second magnetic unit includes a second magnetic body layer and a second intermediate magnetic layer. The strain sensor is provided on the film unit between the first magnetic unit and the second magnetic unit. An electrical characteristic of the strain sensor changes according to a deformation of the film unit.

Abstract: A sensor assembly for detecting surfaces stresses and/or the microstructure state of a ferromagnetic workpiece, wherein at least one first base coil system having a first directional sensitivity is provided, at least one second base coil system having a second directional sensitivity is provided, and at least one third base coil system having a third direction and a third directional sensitivity is provided, and wherein at least the first base coil system and the second base coil system form a first differential angle and the second base coil system and the third base coil system form a second differential angle, and wherein the first base coil system, the second base coil system, and the third base coil system are arranged such that the mechanical surface stresses of the workpiece can be at least partially determined. A method for determining the mechanical surface stresses is also provided.

Abstract: A force sensor can include a magnetic field generator, a magnetic flux return, and a magneto-elastic layer. The magnetic flux return can extend along a first portion of at least one pathway of magnetic flux generated by the magnetic field generator. The magneto-elastic layer can be operable to be in contact with a surface subjected to force and thereby strained. The magneto-elastic layer can extend along a second portion of the at least one pathway of magnetic flux distinct from the first portion.

Abstract: An apparatus for measuring material properties of an object of ferromagnetic material, the apparatus including a probe, the probe including an electromagnet core defining two spaced-apart poles for inducing a magnetic field in the object, and a drive coil wound around the electromagnet core, and means to supply an alternating electric current to the drive coil to generate an alternating magnetic field in the electromagnet core and consequently in the object, wherein the probe also includes two sensing coils arranged in the vicinity of each of the poles, for sensing the magnetic flux density that links the core and the object, such sensing coils are significantly more sensitive to changes in material properties than are sensing coils overwound onto the drive coil.

Abstract: Process for analyzing a fracture or crack surface of a TiAl turbomachine part, comprising at least one of the steps consisting in: a) marking on the surface the position and the orientation of cleavage facets, so as to identify a region of fracture or crack initiation and to determine the direction of propagation of this fracture or crack, b) examining the surface and detecting the regions with the presence of equiaxed grains and/or lamellar grains, so as to evaluate the temperature at which the fracture or crack has taken place, and c) comparing the heat tintings of the surface with those of samples from a heat tinting color chart so as to evaluate the speed of propagation of the fracture or crack.

Abstract: An example device may include an annular flexure hub including a first stationary head, a second stationary head, a first rotatable head, and a second rotatable head. Each of the heads comprise an annular sector of the flexure hub, and the first and second stationary heads are interleaved between the first and second rotatable heads. The device may also include a stationary housing coupled to the first stationary head and the second stationary head of the flexure hub. The device may also include a first sensor positioned adjacent to the first rotatable head of the flexure hub, and a second sensor positioned adjacent to the second rotatable head of the flexure hub. The device may also include a rotatable housing coupled to the first rotatable head and the second rotatable head of the flexure hub.

Abstract: In at least one illustrative embodiment, a method for in-situ pathogen detection may comprise distributing one or more magnetoelastic measurement sensors on a surface of a test object, wherein each of the one or more magnetoelastic measurement sensors includes a biorecognition element configured to bind with a pathogen to cause a shift in a characteristic frequency of the associated measurement sensor; applying a varying magnetic field, using a test coil, to the one or more magnetoelastic measurement sensors distributed on the surface of the test object, wherein the test object is positioned outside of an inner volume defined by the test coil; detecting a frequency response of the one or more magnetoelastic measurement sensors using the test coil, while applying the varying magnetic field; and determining whether the pathogen is present based on the detected frequency response of the one or more magnetoelastic measurement sensors.

Abstract: The present invention discloses a design and manufacturing method for a single-chip magnetic sensor bridge. The sensor bridge comprises four magnetoresistive elements. The magnetization of the pinned layer of each of the four magnetoresistive elements is set in the same direction, but the magnetization directions of the free layers of the magnetoresistive elements on adjacent arms of the bridge are set at different angles with respect to the pinned layer magnetization direction. The absolute values of the angles of the magnetization directions of the free layers of all four magnetoresistive elements are the same with respect with their pinning layers. The disclosed magnetic biasing scheme enables the integration of a push-pull Wheatstone bridge magnetic field sensor on a single chip with better performance, lower cost, and easier manufacturability than conventional magnetoresistive sensor designs.

Abstract: There is provided a pipeline inspection device including: a body part contacting a pipeline and accommodating the pipeline; a coupling part coupled to the body part to enclose the pipeline; and a sensor part including a sensor on at least one of one side of the body part and one side of the coupling part which are in contact with the pipeline to inspect an internal state of the pipeline. The pipeline inspection device according to exemplary embodiments is capable of inspecting pipelines without increasing a gap between the pipelines even in a case in which the gap therebetween is relatively narrow, and is capable of readily and rapidly inspecting a large area of pipelines.

Abstract: A magneto-elastic force sensor includes a sensor head (1) that has an emitting coil (9) which generates a magnetic field and at least one magnetic field sensor (11) for measuring a magnetic flux caused by the magnetic field of the emitting coil (9) in a measured object (13). The sensor head (1) also includes a recorder (14) for recording an electrical value that reflects the inductivity of the emitting coil (9) or that is clearly connected to the latter. The magneto-elastic force sensor allows for compensation of a distance dependency in the measurement signal by ascertaining the distance between the emitting coil (9) or the sensor head (1) and the measured object (13) based on the recorded electrical value and by compensating the distance dependency in the measurement signal based on the ascertained distance.

Abstract: A system includes a magnetostrictive sensor having a sensor head including a driving pole. The driving pole includes a driving coil that may receive a driving current and may emit a magnetic flux portion through a rotary structure. The sensor head also includes a sensing pole including a sensing coil that may receive the magnetic flux portion and may transmit a signal based at least in part on the received magnetic flux portion. The received magnetic flux portion is based at least in part on a force on the rotary structure. The sensor head also includes a temperature sensor disposed on the sensor head. The temperature sensor may measure a temperature of the rotary structure.

Abstract: A building structure includes a block of building material and a magnetic circuit buried in the block of building material. The structure also includes a plurality of sensing devices buried in the block of building material. Each sensing device may include a contactless power supplying circuit magnetically coupled with the magnetic circuit to generate a supply voltage when the magnetic circuit is subject to a variable magnetic field.

Abstract: A method for refrigeration through voltage-controlled entropy change includes applying a voltage signal to a piezoelectric material to generate strain in the piezoelectric material, generating strain in a magnetic material attached to the piezoelectric material, and generating a change in a temperature of the magnetic material in response to the strain in the magnetic material.

Abstract: A method of modifying a workpiece includes providing a workpiece, determining a load stress profile associated with a load condition, the load stress profile comprising a load stress greater than a material stress limit of the workpiece, determining a residual stress profile, the residual stress profile comprising a residual stress less than the material stress limit of the workpiece, and providing the workpiece with the residual stress profile, wherein a sum of the load stress and the residual stress is less than the material stress limit of the workpiece.

Abstract: A system is provided for balancing voltage of two rechargeable energy storage devices connected in series at a common node. A voltage divider is configured to divide a total voltage across the two devices into first and second reference voltages. First and second circuit elements include, respectively: first and second comparators, first and second P-channel MOSFETs, first and second current limiting resistors, and first and second networks of resistors. The first circuit elements are in electrical communication and configured to actively discharge a first device of the two devices when a difference between a voltage at the common node and the first reference voltage is greater than a first predetermined voltage. The-second circuit elements are in electrical communication and configured to actively charge the first device when a difference between the voltage at the common node and the second reference voltage is less than a second predetermined voltage.

Abstract: The present system determines a significant stress value (?) of a component made of magnetizable material. The system has a generating stage for generating a magnetic field of varying amplitude (H); and also includes a pickup stage for acquiring a Barkhausen noise signal (MBN) alongside variations in the amplitude (H) of the magnetic field. The system is characterized by having a processing unit for calculating the reciprocal (1/MBNmax) of the maximum value (MBNmax) of the signal (MBN), alongside variations in the amplitude (H) of the magnetic field. The processing unit has a memory stage storing a linear relation between the reciprocal (1/MBNmax) of the maximum value and the significant stress value (?).

Abstract: Devices, systems and methods for detecting the shape of a moving strip of material with high resolution along the edges thereof. Device and system embodiments may include a plurality of displacement-type shape sensor assemblies that may be collectively linearly displaced in a direction substantially transverse to the direction of a moving strip of material being examined, and also selectively activated or deactivated as necessary so as to provide edge-to-edge strip coverage to the extent possible.

Abstract: According to one embodiment, a pressure sensor includes: a support section; a film section; and a strain sensing element. The film section is supported by the support section and deformable. The film section includes a first film and a second film. The first film includes a first region located in a central part and a second region located in a peripheral part around the first region. The second film is provided on the first region. The strain sensing element is provided on part of the second region. The strain sensing element includes a first magnetic layer; a second magnetic layer; and an intermediate layer. Magnetization of the first magnetic layer changes in response to deformation of the second region. The intermediate layer is provided between the first magnetic layer and the second magnetic layer.

Abstract: A method for enhancing inspection of components of specific geometry based on Barkhausen noises. The method includes specifying a first calibration curve that is independent of the component geometry, which describes the relationship between surface hardness values and measured Barkhausen noise signals. A first noise signal is determined by the measuring device for a reference component having the specified geometry and a first hardness value. A second noise signal is determined for a second reference component, having the specified geometry and a second hardness value lower than the first. A second calibration curve is determined, in which the first calibration curve is fitted to the first noise signal at the first hardness value and to the second noise signal at the second hardness value, such that using the second calibration curve, the measured noise signal of a component having the specified geometry relates with a surface hardness value.

Abstract: The invention relates to a sensor arrangement (2) for determining a relative rotation of two shafts that are arranged coaxially to one another (4, 6), which sensor arrangement comprises at least one magnetic element (29) arranged on a first shaft (4), at least one magnetic element (29) arranged on a second shaft (6) and at least one magnetic field-sensitive sensing element (20), which is arranged in a stationary manner between the magnetic elements (29) of the two shafts (4, 6) and which captures a magnetic field that results from the superposition of the magnetic fields (32) of the magnetic elements (29) of both shafts (4, 6).

Abstract: A method of inspecting a component (1) on the basis of Barkhausen noises in which a plurality of Barkhausen noise signals are processed, which have been or are determined at measurement positions (PS1, PS2, . . . , PS9) along the surface of the component (1) by a measuring device. According to the method, a computer forms a measurement matrix (M) from the Barkhausen noise signals, which matrix contains the Barkhausen noise signals detected as entries. A variety of characteristics are specified, each of which represents at least one cause of a manufacturing defect(s) of the component (1), each characteristic is associated with a processing procedure of the measurement matrix (M). The procedure is specific for the characteristic concerned. Finally, for each characteristic the measurement matrix (M) undergoes the associated processing procedure in which the intensity of the characteristic concerned is determined.