225results about "Magnetic sensor arrays" patented technology

The invention discloses a temperature drift compensation method for a miniature crystal oscillator chip, and particularly relates to the field of temperature drift compensation for electromagnetic interference signal measurement, which comprises the following steps of: arranging a double-shaft Hall sensor array around a temperature sampling channel of the miniature crystal oscillator chip, and carrying out spatial distribution acquisition on a low-frequency electromagnetic field in a chip operation environment; generating an electromagnetic disturbance signal for representing a parasitic electromagnetic interference behavior; and pilot frequency convolution processing is carried out on the electromagnetic disturbance signal and a thermal response signal obtained in a temperature sampling channel, coupling response characteristics related to an electromagnetic interference behavior are extracted, and a spectrum fitting template of an electromagnetic parasitic injection behavior is constructed. A low-frequency electromagnetic disturbance sensing channel is synchronously introduced outside a temperature sampling path, and an interference identification, stripping and compensation dynamic linkage mechanism is constructed to realize active detection and correction of latent electromagnetic interference components in a temperature response signal, so that the problems of frequency compensation error and long-term offset accumulation in the prior art are solved.

Provided is a magnetic moment measurement system and method, which belong to the technical field of magnetic moment measurement, and solve the problems of insufficient accuracy, low efficiency, and vulnerability to disturbance from an external magnetic field in the existing magnetic moment measurement technique. The magnetic moment measurement method includes the following steps: acquiring a magnetic field vector and a magnetic gradient tensor at a center of a magnetic sensor array through the magnetic sensor array; calculating an angle of a magnetic moment vector; and according to the angle of the magnetic moment vector, selecting a corresponding magnetic moment inversion formula, and calculating the magnetic moment vector. By constructing the magnetic sensor array, and using the advanced inversion algorithm, this application not only significantly improves the magnetic moment measurement accuracy, but also greatly shortens the measurement cycle, simplifies the measurement system, and reduces the measurement error.

The invention provides a method for plasma bombardment energy distribution detection and life prediction of a silicon carbide part, and belongs to the technical field of semiconductor processing based on deep learning. The method comprises the following steps: firstly, arranging a magnetic probe array to obtain local electromagnetic parameters, and obtaining plasma luminescence characteristics by using optical imaging and spectrum acquisition equipment; preprocessing the acquired data to obtain multi-source fusion features; designing an energy distribution reconstruction framework based on a generative adversarial network, wherein a generator is used for deducing a three-dimensional energy distribution field of plasma; and inputting the three-dimensional energy distribution field time sequence characteristics into a bombardment dynamic characteristic modeling time sequence depth network, establishing a nonlinear mapping relation between energy distribution and material aging, further obtaining life prediction parameters, and finally obtaining the remaining service life of the silicon carbide part. According to the method, a complex degradation mechanism can be reflected more accurately, and the precision and robustness of life prediction are remarkably improved.

Methods and apparatus for a magnetic field sensor having a first set of MR elements configured to change in resistance due to an applied magnetic field having an orientation in a sensitive axis of the first set of MR elements and a second set of MR elements that are immune to the applied magnetic field. The second set of MR elements is configured to change in resistance due to temperature. A processor can compensate for the response of the first set of MR elements based on the temperature information from the second set of MR elements.

The invention discloses a ferromagnetic material internal defect leakage magnetic field increasing method based on alternating current and direct current composite magnetization, which comprises the following steps of: fixing a workpiece at the center of a composite exciting coil, and synchronously applying direct current and high-frequency alternating current; after pure direct current magnetization is saturated, current is locked, and a basic leakage magnetic field is established; the surface magnetic conductivity is dynamically reduced by overlapping alternating current, and the magnetic shielding effect is weakened; a leakage magnetic field signal is scanned and collected through a differential Hall sensor array, and background magnetic field deduction, peak value comparison and adaptive filtering processing are carried out; and determining an optimal magnetization parameter combination by adopting a gradient descent method and Bayesian optimization. The system is integrated with a composite excitation coil and a signal conditioning unit, so that synchronous excitation, signal acquisition and real-time analysis are realized. The leakage magnetic field signal at the deep defect is enhanced through alternating-current and direct-current composite magnetization, the problem of signal weakening caused by traditional direct-current saturation is solved, the defect detection sensitivity and efficiency are improved, and the method is suitable for non-destructive detection scenes of ferromagnetic materials.

A magnetic sensor element includes a pinned layer, a first non-magnetic layer, a first magnetic layer, and a free layer. The pinned layer has a fixed magnetization direction. The first non-magnetic layer is laminated on the pinned layer. The first magnetic layer holds the first non-magnetic layer with the pinned layer. The free layer is disposed along a lamination direction in which the first non-magnetic layer is laminated on the pinned layer. Each of the first magnetic layer and the free layer has a magnetization direction more easily changed by an external magnetic field than that of the pinned layer. The pinned layer and the first magnetic layer are coupled by indirect exchange interaction.

The invention provides an anti-stray magnetic field rotation angle detection method and system for a three-way sensor, and relates to the technical field of sensor signal processing and motor control, and the method comprises the steps: enabling the three-way sensor to be fixed on a circuit board at an interval of 120 degrees, the sensing axes of the sensors face the rotating part with the permanent magnet together, and the magnetic field direction of the permanent magnet is perpendicular to the sensing axes. The sensor collects three paths of mixed signals containing real angle signals and spurious interference generated when the rotating component rotates, then the signals are subjected to Clark transformation to generate two-phase orthogonal signals, and then anti-interference digital signals are obtained through differential processing and analog-to-digital conversion. Then, a deep learning network based on an attention mechanism is adopted to perform feature enhancement on the signals, and finally, the angle of the rotating part is accurately determined by using an angle calculation algorithm based on the enhanced signals. According to the invention, the accuracy and reliability of angle detection in a strong stray magnetic field interference environment are improved.

In described examples, an integrated circuit (IC) written on a substrate that includes a substrate surface includes a magnetic concentrator, a Hall sensor, a primary coil, and a secondary coil. The Hall sensor at least partially overlaps the magnetic concentrator. The primary coil at least partially overlaps the magnetic concentrator. The secondary coil at least partially overlaps the magnetic concentrator and the primary coil, and surrounds the Hall sensor.

The invention belongs to the technical field of battery detection, and particularly relates to a battery module internal short circuit detection method and system based on magnetic field detection. Comprising the steps of constructing a three-dimensional magnetic field sensing array; screening an effective observation window based on quasi-static logic, and triggering a magnetic sensor in the effective observation window to carry out magnetic induction intensity data acquisition; decoupling of background magnetic field and topology current-carrying contribution magnetism is carried out on the original magnetic induction intensity data, and residual magnetic field features are obtained; inputting the residual magnetic field features into the constructed physical constraint neural network model, and inverting the reconstructed current density based on physical driving; and dividing the battery states into different safety levels by adopting a multi-level fault response strategy based on the reconstruction current density, and completing the internal short circuit detection of the battery module. According to the invention, short circuit detection in the battery module is realized based on magnetic field three-dimensional array perception in combination with a physical constraint deep learning model, and an optional implementation path is provided for early accurate diagnosis of short circuit faults in the battery module.

The present disclosure relates to a method (100) of magnetically calibrating a magnetometer sensing system (30) with respect to an electronic device (50), the method (100) comprising: detecting (110) a disturbing magnetic source (520) in the electronic device (50) relative to a reference coordinate system (X, Y, Z) of the magnetometer sensing system (30); identifying (120) one or more magnetometers (Sk,l) of the magnetometer sensing system (30) which are magnetically affected by the detected disturbing magnetic source (520); selecting (130) one or more balancing magnetic sources (400) to reduce a magnetic effect of the detected disturbing magnetic source (520) on the one or more identified magnetometers (Sk,l); and placing (140) the one or more selected balancing magnetic sources (400) in a fixed relation to the magnetometer sensing system (30) and / or to the disturbing magnetic source (520).

In an embodiment, a method includes wirelessly transmitting power using a transmitter LC tank of a wireless power transmitter, wirelessly receiving power from the transmitter LC tank using a receiver LC tank of a wireless power receiver, interrupting wirelessly transmitting power for a slot period, during the slot period, measuring a receiver signal associated with the receiver LC tank, transmitting receiver data based on the measured receiver signal to the wireless power transmitter, determining a power loss associated with the wirelessly transmitting power based on the measured receiver signal and detecting a metallic object based on the determined power loss.

An autonomous driving control system (102) for a vehicle (101) that travels on a road provided with a marker (105) that emits a steady magnetic field or a quasi-steady magnetic field includes: a magnetic sensor array (104) that is equipped on the vehicle (101) and senses magnetism; and an information processing circuit (103) that generates an image showing a magnetic field in a region closer to the marker (105) than the magnetic sensor array (104), according to a sensing result of the magnetism and a fundamental equation of the steady magnetic field and the quasi-steady magnetic field, and controls travel of the vehicle (101) according to the image.

A magnetic sensor is provided for determining the three components X, Y, and Z of an incident magnetic field in a three-dimensional Cartesian coordinate system. The magnetic sensor comprises a pair of first magnetoelectric conversion elements located in the first and third quadrants, and a pair of second magnetoelectric conversion elements located in the second and fourth quadrants, wherein the pair of first magnetoelectric conversion elements have a magnetosensitive axis along a first axis obtained by rotating the X or Y axis by 45 degrees, and the pair of first magnetoelectric conversion elements are arranged so that the positive directions of their magnetosensitive axes are opposite to each other, and at least one of the pair of first magnetoelectric conversion elements has an electrode pair arranged along the first axis, and the pair of second magnetoelectric conversion elements have a magnetosensitive axis along a second axis perpendicular to the first axis, and the pair of second magnetoelectric conversion elements are arranged so that the positive directions of their magnetosensitive axes are opposite to each other, and in the XY plane, the area of ​​the virtual rectangle formed by connecting the adjacent points of the pair of first magnetoelectric conversion elements and the pair of second magnetoelectric conversion elements is smaller than the area of ​​the magnetoelectric conversion elements.

To provide a magnetic sensor applied to a magnetic field detection device that can accurately detect a magnetic field in a predetermined direction while being compact.SOLUTION: A magnetic sensor comprises a stacked structure in which a first layer including a magnetic yoke, and a second layer including a magnetic field detection element and a plurality of magnetic field generators each applying a magnetic field to the magnetic field detection element and arranged discretely along a first axis direction, are stacked in order in a second axis direction intersecting the first axis direction. The magnetic field detection element is interposed between two magnetic field generators selected from the plurality of magnetic field generators in the first axis direction. The magnetic yoke extends in the first axis direction, and is adjacent to the magnetic field detection element in a third axis direction intersecting both the first axis direction and the second axis direction in a plan view. Magnetization directions of the plurality of magnetic field generators are each inclined at less than 45° with respect to the first axis direction.SELECTED DRAWING: Figure 1B

A method for separating spacecraft generated magnetic noise from geomagnetic field data, comprising: detecting magnetic information and outputting a representative detection signal, the magnetic information comprising magnetic noise and geomagnetic field data; receiving the representative detection signal including the magnetic information and resolving the magnetic noise data and the geomagnetic field data; and outputting a resultant signal representative of at least a geomagnetic field data signal.

Various embodiments disclosed herein comprise systems and methods to conform magnetic field sensors to a target geometry. In some examples, an apparatus is configured to conform to a target geometry. The apparatus comprises a sensor mount and a sensor array. The sensor mount comprises a flexible state for a first environmental condition and a rigid state for a second environmental condition. The sensor mount transitions from the flexible state to the rigid state when the first environmental condition transitions to the second environmental condition. The sensor mount transitions from the rigid state to the flexible state when the second environmental condition transitions to the first environmental condition. The sensor array is coupled to the sensor mount.

A system, comprising: a sensing element including a plurality of resistive elements; a switching matrix that is configured to change a total resistance of the sensing element by bringing online or offline one or more of the plurality of resistive elements, the total resistance of the sensing element, at any point in time, being based on respective resistances of only those of the plurality of resistive elements that are currently online; a matrix controller that is configured to detect when a value of a counter signal is updated and cause the switching matrix to change the total resistance of the sensing element by bringing offline or online one or more of the plurality of resistive elements based on the value of the counter signal; and a counter signal generator configured to detect whether an offset signal satisfies a predetermined condition and update the value of the counter signal.

In a magnetic field detection device capable of detecting a weak magnetic field without using a shield room, the number of components is reduced, and the circuit structure is simplified. A magnetic field detection device (1) includes: a cancellation coil (C2) wound around a winding core portion (13) of a bobbin (10); magnetic sensors (S1, S21-S24) fixed to mutually different positions of the bobbin (10); and a feedback circuit (31) that cancels an ambient magnetic field of a cancellation space by causing a cancellation current to flow through the cancellation coil (C2) in accordance with an output signal of the magnetic sensor (S1). The magnetic sensors (S21-S24) are disposed within the cancellation space. In this way, a common cancellation coil (C2) is used for the magnetic sensors (S1, S21-S24), so the number of components can be reduced, and the circuit structure can be simplified.

Disclosed are methods and devices for detecting retained surgical items or other objects having a magnetic signature within a corpus of a patient. The device can comprise a handle, a shaft extending from the handle, and a distal sensing portion positioned distally of the shaft. The distal sensing portion can comprise one or more gradiometers comprising a plurality of magnetometers. The device can further comprise one or more output components configured to generate a user output to alert a user of a detected object.

A method of characterising a condition of an electrochemical cell 100 comprising a plurality of electrodes, the method comprising: positioning one or more magnetometers 200 adjacent to an electrode surface of the electrochemical cell to measure magnetic field of the electrochemical cell at a first location 202; measuring the magnetic field generated by the electrochemical cell for a predetermined length of time, the measuring providing a first temporal profile of the magnetic field in an x-direction and a second temporal profile of the magnetic field in a y-direction, at the first location; confirming occurrence of a transient current inhomogeneity within the electrochemical cell based on identifying a step-change in an x-component of the magnetic field from the first temporal profile and a coincident step-change in a y-component of the magnetic field from the second temporal profile; and determining a characteristic of the electrochemical cell based on the occurrence of transient current inhomogeneities.

Techniques for reel-to-reel assessment of a high-temperature superconducting (HTS) tape are provided. The techniques include a cryocooler-powered cryogenic system configured to cool the HTS tape in a background magnetic field. The cryocooler-powered cryogenic system may be free of liquid cryogenic. The cryocooler-powered cryogenic system may include a measurement zone, where the magnetic field is perpendicular to the path of the HTS tape. The techniques may also include a Hall sensor array within the measurement zone. The Hall sensor array may be configured to scan a magnetic field at a surface of the HTS tape to measure a screening-current-induced field and separate it from the background magnetic field. The techniques may also include a data acquisition (DAQ) module operably coupled to the Hall sensor array. The DAQ module may be configured to oversample Hall voltages.

A soft magnetic sensor comprising a soft material containing randomly distributed magnetic microparticles and a magnetometer that can estimate force and localize contact over a continuous area. A reference magnetometer can be used to filter motion and ambient noise. Methods for locating contact and determining force comprise data analysis of the magnetometer output. In some embodiments, the sensor can localize an object prior to contact.

A magnetic sensor includes a substrate having a reference plane, a support member having an inclined surface, and a magnetoresistive element disposed on the inclined surface. The magnetoresistive element has a bottom surface, a top surface, and a first side surface and a second side surface connecting the bottom surface and the top surface. The first side surface is, as compared to the second side surface, located in front in a first direction that is along the inclined surface and that gets close to the reference plane. At least a part of the first side surface is, as compared to a first virtual plane, located close to the second side surface, and the first virtual plane intersects with a first corner present at a position at where the top surface and the first side surface intersect and is perpendicular to the reference plane.

The present application provides a magnetic field sensor and a multi-axis magnetic field sensor, and relates to the field of magnetic field measurement technology. The magnetic field sensor comprises: a magnetic flux conversion module, a magnetic induction module, and a differential detection module. The magnetic flux conversion module comprises: a magnetic field input area, a magnetic field output area, a magnetic flux direction conversion area, and a magnetic flux path connection area. The magnetic flux conversion module concentrates and amplifies a magnetic field to be measured in the magnetic field induction direction and converts it into a magnetic field component in a spatial solid angle direction with an angle of 0-90 degrees with the direction of the magnetic field to be measured. The magnetic induction module senses the magnetic field at the air gap of the magnetic flux conversion module, generates a differential voltage signal, and forms an output electrical signal to be measured through the differential detection module. This enables the conversion of the magnetic field to be measured into a magnetic field component in the opposite direction at the air gap, thereby realizing differential detection of a push-pull bridge structure using magnetic induction modules with the same sensitivity direction. It can be manufactured in an integrated manner, leading to a simple process and good sensitivity consistency, and it is easy to produce.

A magnetic sensor comprises a substrate with a reference plane, a support element with an inclined surface, and a magnetoresistive element positioned on the inclined surface. The magnetoresistive element has a bottom surface, a top surface, a first side surface, and a second side surface connecting the bottom and top surfaces. The first side surface is positioned forward of the second side surface in a first direction that runs along the inclined surface and approaches the reference plane. At least a portion of the first side surface is positioned near the second side surface relative to a first virtual plane, and the first virtual plane intersects with a first corner located at the point where the top surface and the first side surface intersect and which is perpendicular to the reference plane.

The invention provides a magnetic sensor and a magnetic field determination method. The magnetic sensor and the magnetic field determination method are used for determining X, Y and Z components of an incident magnetic field in a three-dimensional orthogonal coordinate system. The magnetic sensor is provided with a pair of first magnetoelectric conversion elements located in a first quadrant and a third quadrant, and a pair of second magnetoelectric conversion elements located in a second quadrant and a fourth quadrant, and the pair of first magnetoelectric conversion elements has a magnetosensitive axis along a first axis obtained by rotating an X axis or a Y axis by 45 degrees. The pair of first magnetoelectric conversion elements has a magnetosensitive axis along a first axis, the pair of first magnetoelectric conversion elements are arranged so that the positive directions of the magnetosensitive axes of the first magnetoelectric conversion elements are opposite, the pair of second magnetoelectric conversion elements has a magnetosensitive axis along a second axis orthogonal to the first axis, and the pair of second magnetoelectric conversion elements are arranged so that the positive directions of the magnetosensitive axes of the second magnetoelectric conversion elements are opposite in an XY plane. The area of an imaginary rectangle formed by connecting the adjacent points of the pair of first magnetoelectric conversion elements and the pair of second magnetoelectric conversion elements is smaller than the area of the magnetoelectric conversion elements.

A sensor, comprising: a first signal path including a plurality of magnetoresistance (MR) elements, the first signal path being configured to generate a first signal based, at least in part, on an output of the MR elements, the output of the MR elements being generated, at least in part, in response to an external magnetic field that is incident on the sensor and a first feedback magnetic field; a second signal path including one or more Hall elements, the second signal path being configured to generate a second signal based, at least in part, on an output of the Hall elements; a first feedback coil that is configured to generate the first feedback magnetic field, the first feedback coil being driven with a first drive current, the first drive current being generated, at least in part, based on the first signal.

Apparatus and associated methods relate to measuring position and displacement of a 2D surface magnet array of at least three adjacent magnetic north and south tracks with an acute angle versus its motion displacement relative to a magnetic field sensor (e.g., magnetic sensing probe). In an illustrative example, the geometry of the 2D surface magnet array may be planar with adjacent and alternating north and south pole regions. In some embodiments, the 2D surface magnet array geometry may take the form of (1) an axial cylindrical helical multipole magnet array having individually magnetized layers that are oriented in helical shape, or (2) a radial disk spiral multipole magnet array with at least three adjacent north and south tracks oriented as a spiral shape.

A sensor, comprising: a first signal path including a plurality of magnetoresistance (MR) elements, the first signal path being configured to generate a first signal based, at least in part, on an output of the MR elements, the output of the MR elements being generated, at least in part, in response to an external magnetic field that is incident on the sensor and a first feedback magnetic field; a second signal path including one or more Hall elements, the second signal path being configured to generate a second signal based, at least in part, on an output of the Hall elements; a first feedback coil that is configured to generate the first feedback magnetic field, the first feedback coil being driven with a first drive current, the first drive current being generated, at least in part, based on the first signal.