411 results about "Hall effect" patented technology

The present disclosure provides an orbitronic device having orbital Hall effect or inverse orbital Hall effect, and method for enhancing the efficiency thereof. The orbital torque device comprises: a ferromagnetic / non-magnetic heterojunction formed by compounding a ferromagnetic layer and a non-magnetic layer as an orbital current source, wherein the ferromagnetic layer contains a ferromagnetic material, the non-magnetic layer contains a non-magnetic material with weak spin-orbit coupling, the non-magnetic layer is used as an orbital Hall channel to generate orbital current, and the orbital current enters the ferromagnetic layer, so that an orbital torque is generated through an orbital-spin conversion effect of the ferromagnetic layer to realize switching of a magnetic moment. The present disclosure can provide orbitronic device with low cost and good performance.

The invention discloses a three-dimensional magnetic field bionic seal beard sensor based on a Hall effect. The sensor comprises a mounting frame, a Hall chip, a universal joint component, bionic beards and magnets, wherein the Hall chip and the universal joint component are arranged on the mounting frame; the bionic beards are arranged on the universal joint component; the universal joint component is used for enabling the bionic beard to swing in a first direction and a second direction in a reference plane perpendicular to the center line of the bionic beard after the bionic beard is subjected to the acting force of fluid, the first direction is perpendicular to the second direction, and the universal joint component enables the bionic beard to reset after the bionic beard is not subjected to the acting force of the fluid; the magnetic flux density of the magnets changes along with the movement of the bionic beards; the Hall chip is used for sensing magnetic field information. While the characteristics of strong environmental adaptability and high sensitivity of a conventional bionic beard sensor are reserved, the limitation of one-way sensing of the sensor is broken through, the synchronous detection capability of the flow velocity, the flow direction and the vortex street frequency is improved, and the application range of the sensor in a complex underwater scene is widened.

A dendrometer, comprising a single mechanical element functionally holds a sample under test via a spring-element in the element that draws two arms firmly against the sample. The spring section of the single mechanical element can be serpentine, or any other shape providing the desired spring constant and range of motion. The one or more spring members extend between the first frame member and the second frame member, wherein the one or more spring structures are nonrigid (extensible and compressible) such that the second frame member is movable relative to the first frame member. The dendrometer comprises a toothed socket on an end of each arm to allow adjustment of the range of clamping. In at least one example, a magnet or actuator attached to one arm, and a Hall effect or other positional sensor, is attached to the alternate arm.

A circuit includes a bias current generator, a temperature compensation circuit, and a Hall effect sensor. The bias current generator has a first input, a second input, a first terminal, and a second terminal. The bias current generator includes a resistor circuit having a first terminal and a second terminal coupled to the first terminal and the second terminal of the bias current generator respectively. The temperature compensation circuit has a first input, a second input coupled to the first input of the bias current generator, and an output coupled to the second input of the bias current generator. The Hall effect sensor has a first terminal coupled to the first terminal of the bias current generator, a second terminal, a third terminal, and a fourth terminal.

The invention discloses an intelligent door lock body attitude measurement and dynamic compensation control method, system, equipment and medium, and relates to the technical field of measurement and survey, and the method comprises the following steps: collecting pitch angle and roll angle data, and generating real-time attitude information by using Kalman filtering; a laser ranging module based on the time flight principle is adopted to measure the distance between the lock body and the reference structure, and the measured distance is corrected in combination with data of a temperature sensor; a Hall effect magnetic sensor and an MEMS electronic compass are installed in the lock body, and magnetic field data are fused through low-pass filtering; building a digital twinborn model by utilizing the acquired attitude, correction distance and azimuth data, and simulating the three-dimensional attitude of the lock body; the real-time space coordinates of the lock body are calculated through a triangulation method, and closed-loop control is carried out. According to the invention, the precision of data fusion and the stability of the system are improved, the influence of external interference on the measurement result is reduced, and a reliable dynamic compensation control scheme is provided for the intelligent door lock system.

A system is described that includes a sputter target and a magnetic element array including multiple sets of magnets arranged to have a Hall-Effect region that extends along a length of the sputter target. The elongated sputtering electrode material tube is interposed between the magnetic array and an object to be deposited with a sputtered material from the sputter target. During a direct current high-power impulse magnetron sputtering operation, the system performs a depositing on a surface of the object by generating and controlling an ion and neutral particle flux by: providing a vacuum apparatus containing a sputter target holder electrode; first generating a high-power pulsed plasma magnetron discharge with a high-current negative direct current (DC) pulse to the sputter a target holder electrode; and second generating a configurable positive voltage kick pulse to the sputter target holder electrode after terminating the negative DC pulse.

The present disclosure generally relates to a magnetic recording device comprising a current-in-plane (CIP) spin orbit torque (SOT) device. The SOT device comprises a topological material (TM) layer and one or more free layers. The TM layer may be recessed from the MFS, and may comprise BiSb or YPtBi. Current is configured to flow in-plane into the TM layer. In one embodiment, one or more free layers are disposed on a same surface of the TM layer. In another embodiment, one or more free layers are disposed on opposite surfaces of the TM layer. In embodiments, comprising two or more free layers, voltage outputs read from at least two of the two or more free layers are opposite, and the two free layers have opposite polarities. In another embodiment, the SOT device comprises four free layers arranged in a bridge configuration.

Disclosed is an operation method of a neural network element using a Hall voltage. The neural network element has a hole pattern portion, and the hole pattern portion has a cross shape. When a pulse current is applied, horizontal magnetic anisotropy is formed in a ferromagnetic layer by means of spin-orbit torque, and when an external magnetic field in a direction perpendicular to the pulse current is applied, the inversion of magnetization occurs by means of additional torque. The movement of a magnetic domain wall is performed by the inversion of magnetization, spin electrons applied thereby are scattered, and a Hall voltage is generated according to the anomalous Hall effect. The generated Hall voltage increases according to the number of applications of the pulse current or pulse voltage.

The invention discloses a Hall device and a manufacturing method thereof. The Hall device comprises a substrate; the active region extends into the substrate from the first surface of the substrate, and the active region has a first conduction type; the functional areas are located on the surface layer of the active area, and the adjacent functional areas are arranged at intervals; a plurality of first isolation structures, wherein one first isolation structure is arranged on the surface layer of the active region between the adjacent functional regions; a plurality of field injection regions, one field injection region is arranged in the active region below each first isolation structure, and the field injection region has a second conduction type; wherein a first distance is formed between the bottom of the functional region and the bottom of the active region, a second distance is formed between the bottom of the field injection region and the bottom of the active region, and the second distance is smaller than the first distance. According to the invention, the effective thickness teff of a carrier circulation region in the active region can be reduced, and the detection sensitivity of the Hall device is improved.

A magnetic sensor according to the present invention is capable of measuring a small magnetic field with high accuracy by eliminating 1 / f noise. The magnetic sensor comprises a variable magnetic field detection unit that includes a Hall element having a magnetism-sensing direction giving rise to an anomalous Hall effect and a magnetic field control unit for controlling the Hall element so that a magnetic field having a component in a non-sensing direction orthogonal to the magnetism-sensing direction is generated in the Hall element. The magnetic sensor may further comprise a magnetic field calculation unit that calculates a measurement magnetic field on the basis of a first output and a second output, the first output including a measurement result obtained when the variable magnetic field detection unit measures a measurement magnetic field along the magnetism-sensing direction in a first state in which the direction of the magnetic field generated in the Hall element is not controlled by the magnetic field control unit, the second output including a measurement result obtained when the variable magnetic field detection unit measures the measurement magnetic field in a second state in which the direction of the magnetic field generated in the Hall element is controlled by the magnetic field control unit.

The invention relates to the field of hydrogen sensors, in particular to a palladium-based multilayer film hydrogen sensor based on an abnormal Hall effect as well as a preparation method and application of the palladium-based multilayer film hydrogen sensor. The palladium-based multilayer film hydrogen sensor based on the abnormal Hall effect comprises a substrate, a film structure with a Hall rod pattern and an electrode layer which are sequentially arranged from bottom to top, the thin film structure with the Hall rod pattern sequentially comprises a Pd single-layer thin film and a (Co / Pd) X multi-layer thin film from bottom to top, wherein X represents the cycle number of the (Co / Pd) X multi-layer thin film; x is an integer from 1 to 10; in each period of the (Co / Pd) X multilayer film, an arrangement mode that the Co layer is arranged on the lower portion and the Pd layer is arranged on the upper portion is adopted. The palladium-based multilayer film hydrogen sensor based on the abnormal Hall effect has the advantages of being obvious in hydrogen detection current signal, high in environmental gas interference resistance and controllable in hydrogen detection concentration.

The utility model provides an integrated current sensor, a high-voltage box and a vehicle, and the integrated current sensor comprises a first measurement channel and a second measurement channel, the first measurement channel is a shunting effect channel, and the second measurement channel is a Hall effect channel; the first measurement channel and the second measurement channel are connected to a circuit to be measured and are used for measuring the current of the circuit to be measured; and the second measurement channel is also used for replacing the first measurement channel to carry out current measurement when the first measurement channel is abnormal. The integrated current sensor provided by the utility model has a relatively high integration level, and high-voltage safety is ensured.

The invention discloses a device with a spherical pair structure, a Hall rocker and electromechanical equipment. The device comprises a fixing device and a rotating device, the fixing device at least comprises one of a top cover and a mounting plate; the outer barrel is fixedly connected with the top cover or the mounting plate; the outer barrel and the inner surface of the top cover or the inner surface of the mounting plate jointly form a spherical cavity or form a complete spherical cavity; the rotating device is a detachable movable ball body; the detachable movable ball body is formed by assembling two or more than two parts, and the main body appearance of the assembled assembly body is spherical or partially spherical; an assembly formed by assembling a single part or a plurality of parts of the detachable movable ball is provided with a partial spherical outer surface, and the partial spherical outer surface is in spatial spherical surface contact with the inner surface of the spherical cavity. According to the device, the Hall rocker is simple in structure, long in service life and high in protection performance, and a reliable friction positioning function or a self-resetting function is achieved in a limited space.

The invention discloses a magnetic electronic device for generating track torque by using a metal vanadium or titanium track Hall effect and a manufacturing method thereof. The device comprises a substrate, a track Hall structure containing a vanadium or titanium layer, and a heavy metal layer and a ferromagnetic layer which are adjacent to the track Hall structure, when a charge current passes through the vanadium or titanium layer, a transverse track current is generated based on the track Hall effect, and the track current is injected into the ferromagnetic layer and then converted into an effective track torque for controlling the magnetization state of the ferromagnetic layer. Preferably, the ferromagnetic layer has a perpendicular magnetic anisotropy. According to the invention, the light transition metal vanadium or titanium is used as the track Hall material, the experiment proves that a huge track Hall angle greater than 0.45 can be obtained, and meanwhile, the resistivity of the material is lower, so that the shunting phenomenon can be reduced in an actual device, and the critical current density for realizing write-in flipping can be obviously reduced. The device is simple in structure and compatible with an existing semiconductor process, and a brand new material platform is provided for developing a low-power-consumption and high-density magnetic random access memory (MRAM).

The invention provides a heavy metal / ferromagnetic heterojunction spin orbit torque efficiency regulation and control method, and relates to the field of spin electronic devices, and the method comprises the steps: introducing a vanadium-based oxide with an electronic phase change characteristic at a heavy metal side, and preparing a vanadium-based oxide layer / heavy metal layer / ferromagnetic layer multilayer film heterojunction; current is applied to the vanadium-based oxide layer, orbital flow perpendicular to the current direction is generated based on the orbital Hall effect, the orbital flow flows into the heavy metal layer through interlayer coupling and is converted into spin current perpendicular to the film surface, the spin current and spin current generated by the spin Hall effect of the heavy metal layer are overlaid and then injected into the ferromagnetic layer, and spin orbital torque is enhanced; the spin-orbit torque efficiency is improved; the electronic phase change of the vanadium-based oxide layer is triggered through external excitation, the orbital flow density is dynamically adjusted, and the spin-orbit torque efficiency is regulated and controlled. According to the invention, the dynamic regulation and control of the spin-orbit torque efficiency can be realized by introducing the phase-change material without changing the component or structure of the heterojunction material.

The invention relates to the technical field of rail transit transport vehicle detection, in particular to a method for measuring the axle temperature and the axle speed of a motor train unit, a circuit board fixing groove with an anti-reverse design is formed in a fixing shell and used for installing and fixing a circuit board assembly; two threaded mounting holes are formed in the mounting surface of the fixed shell and are used for fixing and connecting a sensor; the Rh is fixed on the side of the air guide hole through a pouring sealant, and the distances between the Rk and the Rh and the surface of the shell in the direction of the mounting gap are the same; the gear dependent measurement principle based on the Hall effect is abandoned, the temperature and resistance value change of the platinum thermistor Rh is driven through the installation gap airflow pressure intensity change caused by rotation of a measured shaft, shaft speed measurement is completed in combination with a Wheatstone bridge, and the installation position limitation and gear modulus constraint of a sensor on a metal gear are thoroughly eliminated. The installation flexibility of the sensor in the complex space layout under the motor train unit and the adaptation efficiency of different train types and shaft system structures are greatly improved.

A welding electrode apparatus may be mounted to a programmable motion controller such as a robot that presents it to a workpiece along a pre-programmed path conforming to the workpiece surface. The apparatus has a first drive for rotating the welding electrode about its own axis. The welding electrode holder is part of a welding electrode had that is mounted to, or includes, an adapter that itself mounts to a programmable robot. The welding head is sprung on the adapter, such that application of the welding rod against the workpiece under a given force deflects the springs. The adapter can be adjusted in real time relative to the robot to smooth out variations in application force. The apparatus uses Hall effect sensors to sense deviations from a datum of spring displacement or force, and has a servo-motor to re-adjust positioning of the welding head relative to the robot.

The invention discloses a double-range current measurement system based on a solid-state relay, and relates to the technical field of current measurement. The system comprises a closed-loop Hall current sensor, a first shunt resistor, a second shunt resistor, a solid state relay (SSR), a Hall conditioning IC and an external controller. Two shunt resistors with different resistance values are dynamically switched through a solid-state relay, and compatibility of low-current high-precision measurement and high-current wide-range measurement is achieved. The method solves the problems that the precision and range of an existing single-range sensor are difficult to consider, double sensors are high in cost, mechanical relays have defects and the like, has the advantages of low cost, high reliability, good measurement precision and the like, and is suitable for wide-dynamic-range current measurement scenes such as an energy storage system and the like.

The embodiment of the invention provides a container transportation state monitoring method based on multi-parameter perception, which is applied to the technical field of logistics monitoring and comprises the following steps: by taking a Hall switch trigger signal as a time reference and a logic starting point, acquiring acceleration, attitude angle, position and temperature and humidity signals in a time window before and after triggering; performing time sequence correlation analysis on the acceleration, the attitude angle and the position signal to generate initial event judgment; when the initial event is determined to be physical door opening or hoisting start, extracting an impact decay time constant and an attitude angle deviation retention amount, and constructing a two-dimensional feature space to perform mechanical impact classification; asynchronously calling a temperature and humidity signal according to a judgment result for root verification; and generating a joint event code and executing differentiated resource control. According to the invention, triggering events with different properties can be accurately distinguished, risk grading of mechanical impact and source tracing of environmental abnormity are realized, terminal endurance time is obviously prolonged, and monitoring reliability is ensured.

The invention provides a flexible Hall angle sensor and an angle detection system.The flexible Hall angle sensor comprises a flexible substrate and a crystal grain fixed to the flexible substrate, and the flexible substrate is provided with a conductive circuit electrically connected with the crystal grain; the crystal grain is provided with a Hall disc used for converting a magnetic field signal into a Hall voltage signal and a circuit unit used for supporting the Hall disc to work, and the Hall disc is electrically connected with the conductive circuit through the circuit unit. A crystal grain is arranged on a flexible substrate, and a Hall disc for realizing Hall voltage signal detection and a circuit unit for supporting the Hall disc are directly arranged on the crystal grain, so that a single chip crystal grain can realize sensing of magnetic induction intensity; and the conductive circuit which can deform along with the bending or stretching of the flexible substrate and maintain the conductive performance is electrically connected with the crystal grains. The flexible substrate has the advantages of high reliability, mechanical performance, electrical performance and cost while having relatively good flexible performance.

The invention provides a linear encoder, a method and a device for calculating displacement by using the linear encoder, electronic equipment and a non-instantaneous computer readable storage medium. The linear encoder comprises magnetic steel; and a plurality of Hall modules, wherein the plurality of Hall modules are uniformly distributed in pairs around the magnetic steel. According to the embodiment of the invention, the Hall modules are uniformly arranged in pairs around the magnetic steel, so that the Hall modules can generate corresponding voltage signals in a variable magnetic field by using the Hall effect, and the linear Hall element can generate the corresponding voltage signals by using the relative displacement between the magnetic steel and the linear Hall element. And a mapping relation from an actual position to a relative displacement measurement value is established in a measurement stroke, so that the calculation of the displacement of the measured object on a linear axis is realized.

This invention belongs to the field of pipe testing and discloses an automatic pipe wall thickness detection device and method. The detection device includes a frame, a clamping and rotating mechanism, a horizontal moving mechanism, a spring clamping mechanism, and a Hall effect measuring mechanism. The clamping and rotating mechanism is mounted on the frame and is used to clamp the pipe to be tested and drive it to rotate circumferentially. The horizontal moving mechanism is movably mounted on the frame along the length of the pipe to be tested and is located below the clamping and rotating mechanism. The spring clamping mechanism is mounted on the horizontal moving mechanism. The Hall effect measuring mechanism includes a steel ball, a measuring rod, and a main unit. The steel ball is placed inside the pipe to be tested. The measuring rod is electrically connected to the main unit and is mounted on the spring clamping mechanism with its head abutting against the bottom of the pipe to be tested, used to measure the distance between the head and the steel ball placed inside the pipe. The main unit is fixedly connected to the horizontal moving mechanism. This invention is particularly effective for non-destructive testing of the wall thickness of sintered plastic pipes containing micropores.

This antiferromagnetic material has a hexagonal crystal structure (space group P63 / mmc) and has a composition of (Mn1-xAx)3Sn (0<x<0.15, A=Ti, V, Cr, Zr, Nb, Mo, Tc, Hf, Ta, W, Re) or Mn3Sn1-yBy (0<y<0.35, B=Sc, Ti, V, Ga, Y, Zr, Nb, In, Hf, Tl). A is preferably at least one of V and Cr. Also, B is preferably at least one of Ga, In, and Tl.

The utility model discloses a camshaft signal panel angle detection device based on a Hall effect sensor, which comprises the Hall effect sensor, a base and an L-shaped mounting plate, and is characterized in that the Hall effect sensor is mounted on a first strip-shaped hole in the vertical surface of the mounting plate; the Hall effect sensor can be adjusted up and down to ensure that the probe of the Hall effect sensor is as high as the center of the signal panel; and the mounting plate can be mounted on the base in a front-back adjustable manner through the second strip-shaped hole so as to ensure that the distance between the Hall effect sensor and a signal panel of the cam shaft is 1.5-2.5 mm. The cam shaft rotates near the Hall effect sensor probe, the convex teeth on the signal panel periodically change the magnetic field intensity of the Hall effect sensor, and according to the Hall effect principle, a signal panel graph and an output angle value are obtained to complete detection, manual detection is not needed, the accuracy rate is high, and the signal panel graph can be visually displayed.

A device with adjustable exchange bias based on a low-dimensional antiferromagnetic / ferromagnetic insulator heterojunction. A device with adjustable exchange bias based on a low-dimensional antiferromagnetic / ferromagnetic insulator heterojunction. (1) A heterojunction is formed by covering an antiferromagnetic topological insulator with a low-dimensional ferromagnetic insulator; there are two configurations of the heterojunction, namely, the ferromagnetic insulator completely covering the antiferromagnetic topological insulator and the ferromagnetic insulator semi-covering the antiferromagnetic topological insulator; (2) A non-magnetic insulating protective layer is covered above the heterojunction; (3) In the heterojunction, an obvious exchange bias effect can be observed; (4) By changing the coverage range of the ferromagnetic insulator, the sign of the exchange bias can be regulated; (5) The material system used for the device is van der Waals layered materials; by changing the coverage range of the ferromagnetic insulator, the sign of the exchange bias can be regulated; below the Curie temperature and Néel temperature of the magnetic material, the anomalous Hall effect can be measured by using low temperature and magnetic field for magnetotransport measurement.

The invention relates to the field of sensor cables, in particular to a Hall effect-based speed sensor cable, which comprises conductors, an outer sheath, a protective hose and the like, the conductors are made of silver-plated copper and are twisted in pairs, an insulating layer is made of crosslinked polyethylene, and a composite shielding layer comprises an aluminum foil wrapping layer, a tinned copper woven mesh and a ferrite magnetic ring. The protective hose is made of a polyurethane material and is provided with a spiral structure, an anti-bending metal ring and a corrosion-resistant protective ring; the silver-plated copper conductors are twisted in pairs, so that the high-frequency signal transmission performance is improved, and the long-distance transmission attenuation is reduced; the composite shielding layer effectively resists electromagnetic interference; the service life of the cable is prolonged; the cross-linked polyethylene insulating layer, the polyurethane protective hose and the corrosion-resistant protective ring enable the cable to adapt to severe industrial environments and ensure stable operation in different temperatures and complex chemical environments.

The headphone comprises a head beam, two ends of the head beam are respectively connected with an ear shell, a PCBA circuit board, a loudspeaker and a noise reduction microphone are installed in the ear shells, the PCBA circuit board is electrically connected with the loudspeaker and the noise reduction microphone, the PCBA circuit board is located on the rear side of the loudspeaker, and the loudspeaker is electrically connected with the noise reduction microphone. A Hall switch and a control module are arranged; a lifting air bag is installed in the rear end of the ear shell, the rear end of the lifting air bag is connected with a lifting cover, when the lifting air bag ascends backwards, the lifting cover can be opened backwards from the rear end of the ear shell, and when the lifting air bag descends forwards, the lifting cover can cover the rear end of the ear shell forwards. A permanent magnet is mounted at the joint of the lifting cover and the lifting air bag; and the Hall switch and the permanent magnet are opposite in position and are in magnetic induction fit. According to the invention, the headphone can be switched between the noise reduction mode and the transparent mode by raising or lowering the lifting air bag, so that external personnel can conveniently observe and judge whether the headphone is in the noise reduction mode or the transparent mode.

The application relates to the technical field of magnetic sensors, and specifically provides a magnet for a sensor and a magnetization method thereof, the magnet comprising: the magnet is in a circular-arc tile structure, and the length of the magnet is equal to or greater than the maximum displacement stroke capable of being detected by the sensor; the magnetization direction of the magnet adopts one of the length, thickness or circular-arc radial direction of the magnet. The magnetization method comprises the following steps: selecting the material of the magnet and determining the size of the magnet according to the maximum displacement stroke capable of being detected by the sensor, and manufacturing a magnet block in a circular-arc tile structure; determining the magnetization direction of the magnet according to the relationship between the magnetic induction intensity of the sensor and the rotary displacement position and the rotary angle based on the Hall effect; the magnetization direction adopts one of the length, thickness or circular-arc radial direction of the magnet; calculating the magnetization data of the magnet; and magnetizing the magnet block according to the magnetization direction and the magnetization data to obtain the magnet for the sensor. The application can improve the rotary displacement measurement precision of the sensor.

The embodiment of the invention relates to a method and device for detecting a fault of a Hall sensor in a motor, a controller and a medium. The method comprises the following steps: acquiring an initial phase of a rotor of the motor sensed by a Hall sensor, wherein the initial phase is associated with the position of the rotor relative to a stator; determining whether the initial phase corresponds to a zero phase; and determining that the Hall sensor has a fault in response to the initial phase corresponding to the zero phase. According to the method disclosed by the invention, whether the Hall sensor in the motor has a fault or not can be judged only by detecting the phase of the rotor represented by the output signal of the Hall sensor under the condition that expensive and complicated inspection equipment is not used.

1. The name of this design product: Hall effect sensor for tablet computer. 2. Purpose of this design product: This design product is used as a Hall effect sensor for tablet computers. 3. The key point of the design of this product lies in its shape. 4. The picture or photo that best illustrates the design points: three-dimensional picture.