Abstract: A magnetic field sensor has first and second rows of magnetic field sensing elements coupled to an electronic circuit. A magnet can be disposed under or over the magnetic field sensor. The magnetic field sensor is operable to use the first and second rows of magnetic field sensing elements and the electronic circuit to detect a relative rotation angle between the magnet and the first and second rows of magnetic field sensing elements.

Abstract: A magnetic position sensor for determining the angular position of a magnet on a rotatable component, comprising: at least one magnetic sensor for determining different vector components of a magnetic field of the magnet; a memory having a look-up table stored therein that is populated with data representative of different angular positions of the magnet, the data representative of each angular position being correlated with data in the look-up table that is representative of the vector components that would be detected by the at least one magnetic sensor at that angular position; wherein the magnetic position sensor is configured to use the vector components determined by the magnetic sensor and logic to determine the angular position of the magnet from the look-up table.

Abstract: In one aspect, a magnetic field sensor includes a magnetic field sensing element configured to detect changes in a magnetic field caused by a target and an encoder configured to process signals originating from the magnetic field element. The encoder is configured to generate a first output signal and a second output signal. In a non-fault state, the first and second output signals are 90 electrical degrees out of phase from one another, and in a fault state, the first and second output signals are in phase with each other.

Abstract: An apparatus of a rotary pulse encoder and a sleeve, including: a rod-shaped rotary pulse encoder; and a clamping sleeve; in which the rod-shaped rotary pulse encoder and the clamping sleeve are in a bore of a holder for sensing a rotational speed of a rotor, in which the clamping sleeve is positioned in the bore so as to be secured against rotation, and the rotary pulse encoder is friction-locked in the clamping sleeve with a sensor head so as to be axially displaceable, in which the sensor head has a non-cylindrically symmetrical cross-section at least in sections, and the clamping sleeve has at least one inwardly facing position-setting element, by which the sensor head is arranged in the clamping sleeve so as to be secured against rotation.

Abstract: A system includes a ring magnet having magnetic segments and configured to rotate about an axis of rotation, wherein adjacent segments have different magnetic polarities, The system can further include a substrate positioned so that a top surface of the substrate is substantially parallel to the axis of rotation and a center plane passing through the ring magnet and perpendicular to the axis of rotation of the ring magnet intersects the top surface at an intersection line. The system can further include four magnetic field sensing elements supported by the substrate and electrically coupled to form a first bridge circuit, wherein two of the four magnetic field sensing elements are positioned on one side of the intersection line and the other two of the four magnetic field sensing elements are positioned on the other side of the intersection line.

Abstract: A sensing element is provided including a magnetic sensor that detects a first magnetic field component, at least one AC-magnetic field generator that applies at least one additional magnetic field component at a given frequency to the magnetic sensor, where the first magnetic field component and the at least one additional magnetic field component are orthogonal to each other, and at least one demodulator using the given frequency to determine a sensitivity of the sensing element respective to the at least one additional magnetic field component. Also, several methods of operating such sensing element are provided.

Abstract: A magnetic angle sensor system includes a first magnetic sensor configured to generate a first sensor signal, a second magnetic sensor configured to generate a second sensor signal, and at least one signal processor configured to: generate an angle signal including an angular value corresponding to an orientation of a magnetic field based on the first sensor signal and the second sensor signal; generate a vector length signal comprising a plurality of vector lengths corresponding to the first sensor signal and the second sensor signal; determine a vector length variance between at least two consecutively sampled vector lengths of the plurality of vector lengths; compare the determined vector length variance to a tolerance range defined by at least one of a minimum tolerance threshold and a maximum tolerance threshold; and generate a warning signal on a condition that the determined vector length variance is outside the tolerance range.

Abstract: A sensor for measuring a rotation speed of a magnetic encoder includes a first magnetic detector detecting a magnetic field induced from the magnetic encoder and outputting a strength value of the magnetic field as a first electrical signal, a second magnetic detector detecting the magnetic field induced from the magnetic encoder and outputting a strength value of the magnetic field as a second electrical signal, a first output signal generator for generating and outputting first rotation data including information indicating a rotation speed of a wheel based on the first electrical signal, and a second output signal generator configured to generate second rotation data including information indicating a rotation speed of the wheel based on the second electrical signal. The information indicating the rotation speed in the second rotation data may have a higher resolution than the information indicating the rotation speed in the first rotation data.

Abstract: Electrochemical impedance spectroscopy (EIS) may include testing various voltages and currents, storing and sending the data to an electrochemical impedance spectroscopy analyzer (EISA) network, where the data may be compared to historical data to determine a battery event as a user action recommendation may provide preferred operating use of a device battery in response correlation of EIS test results and comparison for similarities of EIS test results. Historical EIS test data may be stored in an EISA network with a server configured to receive EIS test results from battery-operated devices, correlate received EIS test data to historical EIS test data, and provide recommendations on battery use and/or maintenance to the battery-operated device based on the correlation results. Analyzing EIS test data and sending recommendations on battery use and/or maintenance service may be provided on a subscription basis.

Abstract: A rotational angle detection device includes: a main driving gear; two driven gears; two sensors that detect the respective rotational angles of the two driven gears; and a computation circuit configured to compute the rotational angle of the main driving gear based on the respective rotational angles of the two driven gears. The computation circuit includes a difference computation circuit and a wear detection circuit. The difference computation circuit is configured to compute a first difference. The wear detection circuit is configured to detect wear of the two driven gears through a comparison between a value of the first difference that is computed by the difference computation circuit and a first ideal value.

Abstract: The magnetic encoder includes: a core member of annular shape having a press-fitting portion which bends and extends from an edge of a track formation surface, and to which a rotary shaft is press-fitted and fixed; and two or more rows of magnetic tracks arranged adjacent to each other on a magnetic member provided on the track formation surface, each track having N poles and S poles alternately magnetized thereon. The two or more rows of magnetic tracks include a main track that has a largest number of magnetic poles and is used for calculating an angle of rotation, and a sub track used for calculating a phase difference from the main track. The main track is located on a side more distant from the press-fitting portion than the sub track.

Abstract: A sensor device includes a main driving gear, a driven gear, a biasing member, a support member, a rotational angle sensor, and a magnetic shield. The driven gear includes a gear portion and a shaft portion. The shaft portion is provided with a permanent magnet. The biasing member is configured to bias the driven gear toward the main driving gear. The support member supports the driven gear and the biasing member. The magnetic shield rotatably surrounds the shaft portion. The biasing member biases the driven gear toward the main driving gear by biasing the magnetic shield toward the main driving gear. The sliding resistance between the magnetic shield and the driven gear is lower than the sliding resistance between the magnetic shield and the biasing member.

Abstract: A magnetic sensor device includes a magnetic sensor detecting a detection-target magnetic field, and a soft magnetic structure near the sensor. In an orthogonal coordinate system having two orthogonal axes for representing an applied field strength and a magnetization-corresponding value, coordinates representing the applied field strength and the magnetization-corresponding value move along a minor loop not in contact with a major loop as the strength of an external magnetic field including the detection-target magnetic field varies within a variable range, where the applied field strength is a strength of a magnetic field applied to the soft magnetic structure, the magnetization-corresponding value is a value corresponding to magnetization of the soft magnetic structure, and the major loop is, among loops traced by a path of the coordinates as the applied field strength is varied, a loop that is the largest in terms of area of the region enclosed by the loop.

Abstract: A sensor system and a joystick including the sensor system. The sensor system comprises a magnetic field sensor, and first and second magnetic sources. The first magnetic source is rotatable relative to a sensitive surface of the sensor and generates a first magnetic field contribution of at least quadrupolar order. The second magnetic source is pivotable with respect to the sensitive surface and generates a second magnetic field contribution. The sensor is configured for detecting at least an in-plane component of a superimposition field of the first and second magnetic contributions at a plurality of lateral measurement locations on the sensitive surface, obtaining measurements, and determining a rotation angle for the first source from the field gradient measurements and two angular directions for the second source from the field mean measurements. Lateral measurement locations are arranged into two pairs of diametrically opposite measurement locations with respect to the sensitive surface.

Abstract: A method and system for identifying a deformation. The method may comprise disposing an electromagnetic logging tool in a pipe string, performing a logging operation with the electromagnetic logging tool, transmitting an electromagnetic field from a transmitter, energizing the casing string with the electromagnetic field to produce an eddy current, measuring the eddy current with at least one receiver, processing the measurements of the eddy current to find a point-wise eccentricity between the casing string and the pipe string, identifying a zone with the deformation based at least in part on the point-wise eccentricity, determining at least one characteristic of the deformation, and making a wellbore decision related to an integrity of the casing string based on the at least one characteristic of the deformation or the point-wise eccentricity. The system may comprise an electromagnetic logging tool which may comprise a transmitter and at least one receiver.

Abstract: Methods and apparatus for sensing target position by generating a signal by energizing a shaped coil with an AC signal. A sensor receives a signal reflected by a target in response to the signal from the shaped coil, wherein the shaped coil has a first width, and wherein the sensor includes a first sensing element aligned with the shaped coil at the first width, wherein a ratio of the first width and a distance from the sensor to the target is about three-to-one. The received signal can be processed to determine position information of the target. In some embodiments, a shaped coil can have a trapezoidal shape and sensors aligned with the coil to select a sensor based upon target to sensor distance.

Abstract: Various embodiments may provide an electrochemical impedance spectroscopy analyzer (EISA) chip for a microelectromechanical system (MEMS). In various embodiments, the EISA chip may perform an electrochemical impedance spectroscopy (EIS) test on a battery and may gather sensor data associated with a battery from sensors on the MEMS.

Abstract: A rotational angle sensor includes a stator element and rotor element. The stator element has a stator transmitting coil and stator receiving coil. The rotor element is rotatably mounted about a rotation axis, relative to the stator element, and has a rotor receiving coil and rotor transmitting coil electrically connected to each other. The rotor receiving coil is inductively coupled to the stator transmitting coil such that an electromagnetic field produced by the stator transmitting coil induces a current in the rotor receiving coil that flows through the rotor transmitting coil and causes the rotor transmitting coil to produce a further electromagnetic field.

Abstract: A displacement sensor has a magnetic measuring transducer and at least two sensor units, which are arranged at different positions spaced from each other, the measuring transducer being slidably mounted relative to the sensor units. The measuring transducer is magnetized such that it has a magnetic field which rotates at least partially about an axis of rotation along the measuring transducer, and the axis of rotation of the magnetic field runs parallel to the sliding direction of the measuring transducer. The sensor units are designed to each sense two magnetic measured variables proportionally to the magnetic field strength, both measured variables being sensed by both sensor units.

Abstract: The present invention discloses a single-chip high-sensitivity magnetoresistive linear sensor, which comprises a substrate located in the X-Y plane and a soft ferromagnetic flux concentrator array located on the substrate. The soft ferromagnetic flux concentrator array comprises several soft ferromagnetic flux concentrators, wherein there is a gap between each two adjacent soft ferromagnetic flux concentrators. The +X and ?X magnetoresistive sensing unit array respectively comprises +X and ?X magnetoresistive sensing units located in the gaps. The +X and ?X magnetoresistive sensing units are electrically interconnected to form a push pull X-axis magnetoresistive sensor. Each of the magnetoresistive sensing units that have the same magnetic field sensing direction are arranged in adjacent locations. The magnetoresistive sensing units are all MTJ magnetoresistive sensor elements, and each has the same magnetic multi-layer film structure.