Abstract: Inductive adjustment of the core-fitted coil (16) of an eddy-current distance sensor (11) can be avoided if the coil (16) fills a physically predetermined annular space between the winding support (17) of the plastic coil former (15) and its flanges (18-19) as well as the wall (21) of a pot (20) composed of ferromagnetic material, which is placed over the rearward, smaller flange (18) and whose end face (21) rests against an annular area of the front, larger flange (19) with the same diameter as the pot (20). The ferromagnetic coil core (31) which engages coaxially in the winding support (17) can therefore be arranged on the base (24) in the pot (20) and can therefore be mounted as part of the pot (20).

Abstract: A system includes an object in a space to generate an induced field; coils that generate a driving field; a detecting coil that detects a synthetic field of the driving field and the induced field; a unit that detects a driving current through the coil in synchronization with field detection by the detecting coil; a calculating unit that calculates a position and a direction of the object based on a detection value of the synthetic field and a detection value of the driving current; and a unit that calculates a phase of a driving field component which corresponds to the driving field at the detection value of the synthetic field, based on the detection value. The calculating unit obtains a component having a phase difference approximately orthogonal to the phase of the driving field component and calculates the position and direction of the object based on the obtained component.

Abstract: A transducer is described for use in a position sensor. The transducer has a magnetic field concentrating member, such as an elongate ferrite rod, a first coil operable, in use, to couple with a first portion of the magnetic field concentrating member positioned adjacent the first coil and a second coil operable, in use, to couple with a second portion of the magnetic field concentrating member positioned adjacent the second coil, the second portion being spaced along the magnetic field concentrating member from the first portion. The transducer also comprises a resonator having a coil wound around a portion of said magnetic field concentrating member which is located between said first and second portions. The transducer is arranged so that, during use, the electromagnetic coupling between the resonator and at least one of the first and second coils varies as a function of the relative position between the elongate field concentrating member and that coil.

Abstract: A non-contact sensor system is provided that comprises a first sensor element disposed within a first member having an axis Y, and a second member configured to rotate about the axis Y at a value X. The second member is configured to interface with the first member. The non-contact sensor system further comprises a second sensor element disposed on the second member proximate the first sensor element without physically contacting the first sensor element, and the first sensor element and the second sensor element are operatively coupled to facilitate sensing the value X. The non-contact sensor system may be configured to sense velocity, acceleration, and other values.

Abstract: A contactless power transferring coil unit is provided. The contactless power transferring coil unit includes a flat coil, a magnetic film, and a leaking flux detecting coil. The flat coil is formed by winding a conductive wire into a spiral on a substantially flat plane. The magnetic film is disposed so as to cover one entire flat surface of the flat coil. The leaking flux detecting coil is disposed in a periphery outside an outer edge of the flat coil and the magnetic film and detects leaking magnetic flux from the flat coil.

Abstract: Systems and/or methods are provided for a dual-channel inductive proximity sensor. The sensor can include a sensing element which includes a core having a first cavity and a second cavity, a first coil accommodated within the first cavity of the core, and a second coil housed within the second cavity of the core. Each coil can be independently driven by oscillators to generate respective magnetic fields. The magnetic fields can be monitored to determine whether detection of a target object occurs.

Abstract: Systems and/or methods are provided for cancelling stray magnetic fields escaping out the back or sides of an inductive proximity sensor. The inductive proximity sensor includes a coil assembly with a sensing coil. The sensing coil detects magnetic flux escaping out the sides and/or back of the sensor. An active circuit couples to the sensing coil. The active circuit generates a canceling current based upon a current and/or electromotive force in the sensing coil due to the flux. The cancelling current drives a driven coil to generate a magnetic field which can reduce total flux through the sensing coil to zero.

Abstract: A pickup coil includes a sensing unit having an iron core, a permanent magnet magnetically coupled to a rear end position of the iron core, and a coil for sensing a change of magnetic flux occurring in the iron core; and a supporting frame member. The sensing unit is molded with a cup-shaped resin case. The sensing unit is integrally molded with the supporting frame member and is mounted on a mounting object via the supporting frame member. A plurality of weight units for adjusting a characteristic frequency of the coil is stored in a weight storage section formed inside the resin case at a position spaced away from the supporting frame member. The weight storage section is sized such that one or more weight units are accommodated therein.

Abstract: A turbocharger monitor including a sensor adapted and positioned with respect to a turbocharger housing to sense passing compressor blades, generating both rotor rotation information and rotor displacement information. A controller is configured to receive the generated information from the blade sensor, and to establish rotor rotation speed and an indicator of bearing condition.

Abstract: A position detection apparatus and a medical-device-position detection system that have improved position detection accuracy are provided by setting high amplification for the position detection apparatus. The position detection apparatus includes a circuit that has at least one embedded coil (10a) and that is provided inside an object (10) to be detected; a first magnetic-field generating unit (11) for generating a first magnetic field in the region where the embedded coil (10a) is disposed; a magnetic-field detecting unit (5, 12) for detecting an induced magnetic field generated at the embedded coil (10a) by the first magnetic field; and a second magnetic-field generating unit (23) for generating a second magnetic field having a phase substantially opposite to the phase of the first magnetic field.

Abstract: A sensor device for height measurement, air spring comprising a sensor device for height measuring and a corresponding method allowing determining the height also under rough conditions like noisy, dusty or vibrating environments.

Abstract: The present invention provides an oscillatory, magnetically-activated position sensor. According to this invention, mechanical motion changes the linkage of magnetic flux between a magnet and an inductor having a magnetic core. The resulting change of flux through the core modulates its permeability responsive to the mechanical motion. The inductor is comprised by an electronic oscillator circuit, the oscillation amplitude, and frequency, of which is thereby modulated responsive to the mechanical motion. Circuitry for detecting the oscillation amplitude, and for generating a sensor output signal responsive to the mechanical motion is provided. Matrix operation of sensors according to this invention is also taught. A key position sensor for a musical instrument manual, or clavier according to this invention is provided. A clavier key comprising plural key sensors according to this invention is also taught.

Abstract: A rolling bearing unit having a sensor comprising: a first raceway member, on the outer circumferential surface of which a raceway surface is provided; a second raceway member, on the inner circumferential surface of which a raceway surface is provided; a plurality of rolling elements arranged between the raceway surface of the first raceway member and the raceway surface of the second raceway member; a base plate, the shape of which is formed into an annular and flat shape, having a through-hole that the first raceway member penetrates; a first coil, the shape of which is formed into a plane shape, arranged so that the first coil surrounds an overall circumference of the first raceway member; and a plurality of second coils, the shape of which is formed into a plane shape, arranged around the first coil.

Abstract: An apparatus including a controller, a workpiece transport in communication with the controller having a movable portion and a transport path, and a multi-dimensional position measurement device including at least one field generating platen attached to the movable portion and at least one sensor group positioned along the transport path and in communication with the controller, the field generating platen is configured for position measurement and propelling the movable portion, each sensor in the at least one sensor group is configured to provide but one output signal along a single axis corresponding to a sensed field generated by the at least one field generating platen and the controller is configured calculate a multi-dimensional position of the movable portion based on the but one output signal of at least one of the sensors in the at least one sensor group, the multi-dimensional position including a planar position and a gap measurement.

Abstract: A magnetic induction tomography system and method for studying the electromagnetic properties of an object includes generator coils adapted for generating a primary magnetic field, and sensor coils adapted for sensing a secondary magnetic field. Actuators provide relative movement between the generator coils and/or the sensor coils on the one hand and the object to be studied on the other hand.

Abstract: A method is disclosed of measuring vibrations on turbo-machine rotary turbine blades utilizing an induction sensor at high temperatures. A set of magnets produces a magnetic field which results in a measurement signal generated in the sensor's coil which then can be interpreted to measure the vibrations.

Abstract: Embodiments of the present invention provide an apparatus, comprising a field emission source having polarities and positions in accordance with a code, a plurality of connected coils adapted to move proximate to said field emission source and having positions in accordance with said code, and wherein an electrical pulse is created when said field emission source is aligned with said plurality of connected coils according to said code.

Abstract: There is described a sensor unit (3) for a rotary encoder which serves for detecting the rotary movements of a drive shaft (1) in both directions and which has a single-stage transmission with an input gear (15) which is arranged concentrically with respect to and is non-rotatably connected to the drive shaft (1).

Abstract: A waste gate actuator for an exhaust gas turbocharger, including an actuator housing and an actuator cover, an element for actuating the waste gate valve and electronic components for controlling the element to actuate the waste gate valve being arranged in the waste gate actuator. Provided is a simple and inexpensive revolution counting system on the turbocharger which allows the number of revolutions of the rotating parts (turbine wheel, compressor wheel, turboshaft) to be detected without substantial constructional alterations to the design of existing turbochargers. A sensor for detecting the variations in a magnetic field that are produced by the rotation of the rotating parts is arranged in or on the actuator housing or in or on the actuator cover.

Abstract: A gripper assembly includes at least one movable gripper jaw and a sensor member coupled for movement with the at least one gripper jaw. The sensor member includes a slot. A sensor is located at least partially within the slot and includes at least one inductor for inductively detecting a proximity of the sensor member.

Abstract: A proximity transducer system including an eddy current effect proximity probe, a proximity electronics module coupled to the probe, a monitoring system and a two-wire, current interface connecting the proximity electronics module to the monitoring system is disclosed. The proximity transducer system is operative for measuring position and vibration of a component to be monitored. The current interface is made up of a pair of wires, e.g., a twisted pair, and is adapted for providing power to the electronics module and an electrical signal from the proximity electronics module that is representative of (e.g., proportional to) the length of the gap between the probe and the component being monitored. That signal has a DC component that represents a steady state distance and an AC component that represents active movement of the component, such as vibration.

Abstract: Systems, methods and apparatus are provided through which in some implementations determine the amplitude of an amplitude modulated signal, modulated by the position of an object being sensed. In some aspects, the apparatus accepts an excitation signal and the amplitude modulated signal and divides the amplitude modulated by the excitation signal to produce an output signal that is proportional to the position of the object being sensed. In other aspects, the division is performed only when the excitation signal is non-zero, such as close to the peaks in the excitation signal. In other aspects, the excitation signal and amplitude modulated signal are degraded due to an air gap and the degraded signals are used to correct for amplitude fluctuations due to the air gap, and produce an output signal, tolerant of the air gaps, that is proportional to the position of the object being sensed.

Abstract: A linear position sensor having a transmitter coil which generates electromagnetic radiation when excited by a source of electrical energy and wound in a first direction. A receiver coil is contained within the transmitter coil and the receiver coil includes both a first loop wound in a first direction and a second loop wound in the opposite direction. A coupler element linearly moves along a first direction relative to the transmitter coil which varies the inductive coupling between the transmitter coil and the receiver coil as a function of the linear position of the coupler element to thereby vary the electrical output signal from the receiver coil when excited by the transmitter coil. The first and second loops of the receiver coil are linearly aligned with each other along the first direction.

Abstract: A detector to measure the displacement of relatively moveable bodies along an axis comprising: a resonant electrical intermediate device further comprising an inductor, whose width varies along the displacement axis, and a capacitor in electrical series which co-operates with an antenna comprising transmit and receive windings whose mutual inductance varies according to the position of the electrical intermediate device relative to the antenna.

Abstract: A simplified micro-magnetic based sensor and a system built with it for detecting or measuring acceleration, speed, position, placement, tilt, and vibration are disclosed for a reduced product size, simplified manufacturing process, and reduced product cost. Both simplified micro-magnetic sensor and simplified micro-magnetic sensor system include a primary micro inductor and a secondary micro inductor coupled with a micro magnetically permeable dynamic medium element that is small, simple and low cost to manufacture.

Abstract: The position sensor includes a moving member configured to be displaced in response to displacement of a measurement target, a resonant unit, an oscillation unit, a signal processing unit, an output unit, a signal absence detection unit, and a low-pass filter. The resonant unit includes a detection coil arranged to have inductance varied corresponding to displacement of the moving member. The resonant unit is configured to have a resonant frequency determined by the inductance of the detection coil. The oscillation unit is configured to output an oscillation signal having its magnitude oscillating at a frequency corresponding to the resonant frequency. The signal processing unit is configured to determine the displacement of the measurement target on the basis of the oscillation signal. The output unit is configured to output an output signal indicative of the displacement of the measurement target determined by the signal processing unit.

Abstract: A multi-path data dissemination method for a magnetic diffusion wireless network and a system thereof overcome environmental interferences in wireless data transmissions. Each node of the network is provided for figuring out its good neighbors by broadcasting a good-neighbor exploratory message in a bootstrap process. Each node keeps a good-neighbor table containing nodes with a RSSI higher than a threshold of the good-neighbor table. A magnetic field of a magnetic diffusion (MD) dissemination method capable of determining a data dissemination path is created according to the good-neighbor tables to ensure that the data can be forwarded to a data sink successfully.

Abstract: Provided is a material for tactile sensor, which is easy to be formed, and in which the shape, size and orientation of coils dispersed in the medium are sufficiently controlled. The tactile-sensitive material includes a medium and a plurality of micro coils dispersed in the medium and constituting a LCR resonance circuit, and wherein each of the plurality of micro coils includes at least one spiral coil portion, and coil axes of the plurality of micro coils are aligned along at least one direction or directed in at least one plane. When a tactile stress is applied to the tactile-sensitive material, the C component is varied significantly, which contributes to the improvement in sensitivity of the tactile sensor. Further, by providing a core at the coil center, the sensitivity is more improved.

Abstract: Wind turbine comprising a generator section with a generator rotor and a generator stator. A first air gap is defined between a first surface of the generator rotor and the stator, and magnets and electro conductive windings are provided at opposite sides of the first air gap to create a magnetic field over the first air gap during operation. The wind turbine comprises distance measurement means arranged to measure the radial length of a second air gap defined between a second surface of the generator rotor and a stationary part of the generator section. The second air gap is located at a radial distance from the first air gap at a position where there is no interference of a magnetic field generated by the magnets over the first air gap, and the length of the second air gap corresponds directly to the length of the first air gap. This enables accurate measurement and monitoring of the air gap length.

Abstract: A measuring device to measure a magnetic field having at least one measuring coil and at least one sensor to measure low-frequency magnetic fields, which measuring coil and which sensor have their planes of extension each positioned or positionable transverse to the flux direction of the magnetic field. The measuring coil and the sensor are connected to a signal processing device with which, depending on a first measurement signal provided by the measuring coil and a second measurement signal provided by the sensor, an output signal that essentially corresponds to the magnetic field can be generated. The measuring coil, the sensor, and the signal processing device are monolithically integrated into a semiconductor chip. The measuring coil may also be formed by means of traces of a printed circuit board on which the semiconductor chip that has the sensor and the signal processing device is located.

Abstract: A first magnet is secured to the movable member at a first axial position and is associated with a first magnetic field. A secondary magnet is secured to the movable member at a secondary axial position and is associated with a secondary magnetic field. A sensor assembly comprises magnetic sensors arranged in an array (e.g., on a fixed member). A first magnetic sensor is spaced apart from the sensor assembly such that the first magnetic sensor detects the first magnetic field of the first magnet in a first state and an absence of or change in the first magnetic field in a second state. A data processor is arranged for determining an axial position of the moveable member based on at least one of the magnetic fields sensed by the sensor assembly.

Abstract: An assembly includes a magnetostrictive transducer that provides a transducer output. Amplifier circuitry receives the transducer output and generates a transducer output burst and a bias output burst. The transducer output burst and bias output burst overlap in time and differ by a phase difference. A burst processor receives the transducer output burst and the bias output burst. The burst processor provides a displacement output that is a function of a time when the transducer output burst and the bias output burst are at the same voltage level.

Abstract: An apparatus for providing an indication of rotational position of a shaft by parameter change. The apparatus includes a resilient, serpentine-shaped middle portion, a first end portion located at one end of the middle portion, and a second end portion at another end of the middle portion. The second end portion is for location adjacent to the first end portion to permit securing of the first and second ends together subsequent to the middle portion being resiliently extended around the shaft. The serpentine-shaped middle portion is sized to be taut on the shaft and is shaped to have a plurality of undulations. The undulations providing a plurality of event members each having at least one characteristic that causes a change of a parameter that can be sensed by a sensor when the event member rotates past the sensor.

Abstract: The present invention provides an inductive angle sensor with improved common mode noise rejection and a signal processing method of the same, which can improve electromagnetic compatibility (EMC) characteristics and obtain an accurate output value by eliminating common mode noise. The signal processing method includes adding signals obtained from a pair of receiver coils by an adder, subtracting the signal obtained from one of the pair of receiver coils from the signal obtained from the other receiver coil by a subtracter, multiplying the value obtained from the adder by the value obtained from the subtracter by a first multiplier, multiplying the value obtained from the subtracter by itself by a second multiplier, and dividing the value obtained from the first multiplier by the value obtained from the second multiplier by a divider.

Abstract: A micro-magnetic based sensor and a system built with it for detecting or measuring acceleration, speed, position, placement, tilt, and vibration are disclosed for a reduced product size, simplified manufacturing process, and reduced product cost. Both micro-magnetic sensor and micro-magnetic system include a primary micro inductor and a secondary micro inductor coupled with a micro magnetically permeable dynamic medium element that is small, simple and low cost to manufacture.

Abstract: According to the present invention, an electromagnetic encoder includes a number of scale coils arranged on a scale along a measuring direction; and transmitting coils and receiving coils arranged on a grid to be movable relative to the scale in the measuring direction, in which a relative movement amount between the scale and the grid is detected based on variation in magnetic flux detected by the receiving coils via the scale coils at the time of exciting the transmitting coils, and the receiving coils are provided in the measuring direction to be a plurality of sets, one of the sets of the receiving coils being displaced by a ½ phase of a scale pitch relative to the other set of the receiving coils.

Abstract: A displacement detecting apparatus of an electromagnetic actuator, including: an electromagnetic actuator including: a movable core; a drive coil which causes a displacement of the movable core; and a detection coil disposed at a position where a mutual coupling coefficient with the drive coil changes with the displacement, the actuator transmitting a drive force of the movable core to a mechanical system; a drive portion for supplying a drive current to the drive coil on the basis of a pulse width modulation signal; and a displacement detecting portion to which an output voltage of the detection coil is inputted, for outputting a displacement detection signal, wherein the displacement detecting portion includes: a sampling-signal generating portion for generating a sampling signal in synchronism with the pulse width modulation signal; and a synchronous sampling portion for outputting the displacement detection signal by sampling the output voltage in synchronism with the sampling signal.

Abstract: An electromagnetic motion sensor includes a base, an electromagnetic induction layer, a block, and an emitting coil. The electromagnetic induction layer with a plurality of induction coils is arranged on the bottom of the base. The block is movably connected to the base by a plurality of elastic members. The emitting coil is fixed to a center of the bottom of the block facing the induction layer. A circuit inside the block provides current to the emitting coil. The block moves with the jerk of the motion sensor when the motion sensor is jerked, causing the elastic members to be distorted. The relative movement between the block and the magnetic induction layer causes more than one of the induction coils generate and output voltage signals according to the change of magnetic flux through the plurality of induction coils caused by the moving of the emitting coil.

Abstract: Provided is an object detecting device, which can detect the shape of or the distance from an object made of an electrically conductive or magnetic material, and which can detect the position indicated by an object made of an electrically-non-conductive/non-magnetic material, such as a finger. The object detecting device detects the shape of or the distance from an object to be measured, which is placed on a detection surface and made of an electrically conductive or magnetic material, by using an electromagnetic induction. The object detecting device includes a first loop wire group of a plurality of first loop wires (1) arranged in parallel on the same plane, a second loop wire group of a plurality of second loop wires (2) arranged in parallel on the same plane, and a spacer (3) for keeping the distance between them at a constant. The plurality of the second loop wires (2) are individually arranged in a direction perpendicular to the plurality of the first loop wires (1).

Abstract: A circuit arrangement for analysis and compensation of the signals for an inductive displacement sensor is provided. The circuit includes a first operating amplifier, a second operating amplifier and a coil for a displacement measurement, in parallel with the second operating amplifier output and the second operating amplifier first input and connected to a capacitance in series with the coil inductance and coil resistance to form an RLC series tuned circuit. In order to improve the accuracy of a measured resonance frequency, the circuit arrangement can be extended with a second coil for a temperature compensation, by connecting a first of the ends of the coil winding to a second end of the coil winding of the first coil and a second of the ends of the coil winding to the second input of the first operating amplifier.

Abstract: A method for analyzing the DC superposition characteristics of an inductance device using a magnetic field analysis simulator, comprising a first step of determining an initial magnetization curve from initial magnetization to saturation magnetization, and pluralities of minor loops at different operating points, on a toroidal core made of the same magnetic material as that of the inductance device, and obtaining point-list data showing the relation between magnetic flux density or magnetic field strength and incremental permeability from the incremental permeability at each operating point; a second step of determining an operating point at a predetermined direct current on each element obtained by mesh-dividing an analysis model of the inductance device by a magnetic field analysis simulator based on the initial magnetization curve of the core, allocating the incremental permeability to the operating point from the point-list data, and integrating the inductance of each element obtained from the incremental

Abstract: A sensor magnet holder is mounted on a motor shaft, and a sensor magnet is provided relative to a magnetic induction sensor on the non-moving side for obtaining a signal indicative of a rotational position of the motor shaft. The sensor magnet holder integrally forms a cylindrical portion, a flange portion of a terminal end of the cylindrical portion having a large diameter, a magnet rear end holding portion of the other terminal end of the cylindrical portion and a plurality of snap fit board portions. A shaft press fit portion is formed on an internal diameter of the flange portion. The plural snap fit board portions extend from the cylindrical portion in an axial direction of the motor shaft. A magnet front end holding portion is formed at an extending tip over an outer diameter surface of each of the snap fit board portions.

Abstract: An inductive proximity sensor or switch and a method of using same. The sensor or switch includes an Application Specific Integrated Circuit (“ASIC”) and a plurality of external components. The ASIC is implemented in CMOS technology and has an oscillator. A switch point of the sensor or switch is predetermined by selection of a bias voltage to a potential node of the oscillator.

Abstract: A position sensing assembly includes a bearing element and a helically shaped rotational member used to drive a portion of a sensor assembly, such as a Digital Rotary Magnetic Encoder. Interaction between the bearing element and a helically shaped rotational member minimizes the presence of backlash in the position sensing assembly. Accordingly, as an actuator assembly drives both a control element, such as a flight control surface, and the position sensing assembly, the sensor assembly generates an output signal that accurately reflects the position of the control element.

Abstract: A probe with plural output channels for sensing the movement of a body of magnetic material. The probe includes a magnetically energizable pole piece and a plurality of electrically conductive circuits, coupled to the magnetic pole piece, such that a change in magnetic flux in the pole piece caused by movement of the body relative to the pole piece induces a voltage in each of the circuits. The electrically conductive circuits are wound around each other in a symmetrical fashion such that in the vicinity of the magnetic pole piece each circuit experiences substantially the same change in magnetic flux. A probe of this type provides a plurality of substantially identical output signals and is easy to manufacture and replicate.

Abstract: A position encoder is described that generates a signal whose phase varies with a position to be determined. A phase detector determines a first phase measurement of the sensor signal during a first mode and a second phase measurement of said sensor signal during a second mode. The phase detector then differences the first and second phase measurements to obtain a phase difference measurement, which it uses to determine an indication of the position to be sensed. A controller controls a signal generator in order to set a start phase of signals generated in at least one of the first and second modes so that the timings at which said sensor signal crosses a reference level are substantially the same.

Abstract: An industrial control sensor is provided. The sensor includes a sensor circuit to detect changes in an electromagnetic field induced from an object or material passing in proximity of the electromagnetic field. This includes a housing that employs the sensor circuit as part of an inductive proximity sensor. A sensor face is attached to the housing, where the sensor face receives the changes in the electromagnetic field and transmits the changes to the sensor circuit, and where the sensor face has a higher electrical resistivity or a lower temperature coefficient of resistivity than stainless steel.

Abstract: The present invention relates to a method for the detection of a predamping state of an inductive sensor. The sensor has at least one oscillator with a resonant circuit and an oscillation amplifier. According to the method the oscillatory response of the oscillator is analyzed with an operating amplification or gain. According to the invention the method is further developed in that the oscillatory behavior of the oscillator is additionally analyzed for an analysis amplification or gain, which is chosen lower than the operating amplification. The analysis amplification is also chosen in such a way that the oscillatory response of the oscillator reacts sensitively to objects or articles located in close proximity to the sensor. The invention also relates to an inductive sensor with predamping detection.

Abstract: The present invention relates to an inductive proximity switch with an oscillator having a resonant circuit and an amplifier and with an evaluating and control device for evaluating an impedance of the resonant circuit and for outputting a switching signal. According to the invention, the proximity switch is characterized in that a frequency measuring device is provided for measuring the oscillation frequency of the oscillator and for eliminating ambiguities of the evaluation result of the evaluating and control device. The invention also relates to a method for operating an inductive proximity switch.

Abstract: An inductive angle-of-rotation sensor includes a printed circuit board, on which one excitation conductor path, and a first, second as well as third receiving conductor path are applied. The angle-of-rotation sensor further includes a graduation element having a first and second graduation track. The first and second graduation tracks, and the first and second receiving conductor paths are arranged such that signals having a first period number are able to be generated by the first receiving conductor path, and signals having a second period number are able to be generated by the second receiving conductor path. The graduation element further has a third graduation track, so that signals having the first period number are able to be generated by the third receiving conductor path. In addition, a method is provided for operating an angle-of-rotation sensor.