290 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 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.

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 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 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.

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.

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.

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.

1. The name of this design product: vibrating sample magnetometer. 2. Purpose of this design product: This design product is used to test the Hall effect. 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.

Disclosed is a Hall-effect propulsion system comprising a Hall-effect thruster (10), a cathode (40), and an electrical power supply (80) including an engine power supply (81) delivering an engine discharge current (Id) to the cathode (40) allowing an engine discharge (DM) to be created in a gas contained in the Hall-effect thruster (10), and a secondary power supply (82) delivering a secondary discharge current (Ik) to the cathode (40). The Hall-effect propulsion system comprises means (90) for controlling the electrical power supply (80), which are configured to command delivery of a secondary discharge current (Ik) by the secondary power supply (82) to the cathode (40) in order to keep the cathode (40) at a minimum operating temperature between two activations of the engine power supply (81).

In one aspect, a Hall effect device includes an implantation layer; an epitaxial layer located above the implantation layer; a trench filled with a dielectric material and extending from a top surface of the epitaxial layer into the implantation layer and defining an enclosed region; a buried layer the epitaxial layer from the implantation layer within the enclosed region; and a contact pad located on the epitaxial layer. The trench reduces a current from the contact pad from traveling in a lateral direction orthogonal to a vertical direction and enables the current to travel in the vertical direction.

The invention discloses a topological photonic crystal terahertz wave router based on a Hall effect and a method thereof, and belongs to the field of integrated waveguides. The router comprises a reverse topological photonic crystal area, a defect topological photonic crystal Z-shaped waveguide area, a defect topological photonic crystal rectangular ring cavity waveguide area, a defect topological photonic crystal C-shaped waveguide area and a forward topological photonic crystal area, and an excited terahertz wave source is arranged in the defect topological photonic crystal Z-shaped waveguide area. The terahertz valley Hall topology router can generate different transmission beam splitting functions for right-handed circularly polarized terahertz wave input with various frequencies, has good unidirectional transmission, backscattering resistance, low-loss transmission and strong turning capability, and can be used for realizing high-capacity, integrated and multifunctional terahertz wave multiplexing.

A fully integrated micro search coil magnetometer (μSCM) with a low-noise instrumentation amplifier is provided for low-frequency magnetic field measurements in the range of 1Hz to 1kHz. A micro search coil formed by stacking planar spiral inductors and serially connecting them with an in-phase configuration is used for magnetic field measurements. The critical line width and inner diameter of a planar spiral inductor are theoretically calculated and experimentally verified, enabling the development of a unique CMOS layout. This layout incorporates the calculated critical inner diameter, significantly optimizing the area utilization on the CMOS die. Additionally, the CMOS die includes a polysilicon-layer inductor for on-chip calibration, a Hall effect sensor for DC magnetic field measurement, and a temperature sensor for enhanced functionality. The μSCM delivers a compact, energy-efficient, and highly sensitive solution for low-frequency magnetic field measurements, surpassing the performance of most commercially available Hall effect sensors.

The invention discloses a low-power-consumption planar three-dimensional magnetic sensor based on a graphene microcoil / magnetic composite film and a three-dimensional magnetic field measurement method thereof. The sensor is formed by sequentially laminating a substrate, a bottom-layer soft magnetic composite film, an insulating layer, a graphene microcoil, a passivation layer and a top-layer soft magnetic composite film. The sensor utilizes a planar structure to realize three-dimensional magnetic field detection, on one hand, the sensor is based on an inductive giant magneto-impedance mechanism, and high-precision detection of a magnetic field in a plane (X / Y axis) is realized by utilizing the change of inductive reactance between excitation and induction graphene coils along with the magnetic field; on the other hand, by means of the excellent Hall effect of graphene, magnetic field components in the vertical direction (Z axis) can be sensed at the same time. According to the sensor, real-time decoupling of a three-dimensional magnetic field can be realized by using a planar structure through one-time measurement, and angle and space errors introduced in the conventional three-dimensional sensor assembling process are avoided. In addition, due to the collaborative optimization design of the graphene coil and the soft magnetic thin film, power consumption is reduced, and the resolution ratio is improved.

This invention relates to an electric motor and a cleaning device. The electric motor includes a housing assembly, a fixing assembly, a stator assembly, a rotor assembly, a circuit board, and a Hall effect detection assembly. The fixing assembly is at least partially located within a receiving cavity of the housing assembly; the stator assembly is located within the receiving cavity and fitted over the fixing assembly; the rotor assembly is located outside the stator assembly and connected to the housing assembly to rotate synchronously with it; the circuit board is located within the receiving cavity; the Hall effect detection assembly includes a Hall sensor and a magnetic component, the Hall sensor being disposed on a control board, and the magnetic component being disposed on the housing assembly, the magnetic component, the control board, and the stator assembly being arranged side-by-side along the axial direction of the fixing assembly; the fixing assembly includes a coaxially arranged fixing member and a sleeve, the sleeve being located outside the fixing member, the sleeve having a higher machining precision than the fixing member, and the circuit board being fitted snugly over the sleeve. The higher-precision sleeve limits the circuit board, improving the reliability of the circuit board's fixation, thereby improving the accuracy of the Hall sensor detection.

The utility model belongs to the technical field of photovoltaic connectors, and particularly relates to a photovoltaic connector with a current detection function, which comprises a photovoltaic connector male head and a photovoltaic connector female head, a Hall effect current sensor is fixedly mounted on the surface of the photovoltaic connector male head, a mounting box is fixed on the surface of the Hall effect current sensor, and the Hall effect current sensor is fixed on the mounting box. A first circuit connector is fixed on the surface of the mounting box, the first circuit connector is electrically connected with a Hall effect current sensor, and a fixed box is fixed on the surface of the other side of the mounting box. According to the utility model, through the Hall effect current sensor, the actual current value passing through the photovoltaic connector can be continuously monitored, key data can be timely acquired, a basis is provided for fault diagnosis, and once abnormal current such as overload or short circuit is detected, alarm information can be sent to a background monitoring system, so that potential safety accidents are avoided; and meanwhile, the maintenance is also convenient due to the characteristic of easy disassembly.

The invention relates to the field of current sensors, and discloses a shunt-based two-way conditioning current sensor, the sensor comprises a shunt detection module and a Hall detection module, the shunt detection module is used for connecting a shunt in series in a loop to be detected, when current flows through the shunt, tiny voltage difference is generated, and the Hall detection module is used for detecting the current flowing through the shunt. Isolating, amplifying, raising and calibrating the voltage difference, and substituting the voltage difference into a UI fitting formula to obtain a current value to be measured; the Hall detection module and the diverter detection module carry out detection synchronously, and a measured voltage signal is output after being amplified, raised and calibrated. By adopting a mode of double-path independent measurement and synchronous comparison of the shunt sensor and the Hall sensor, measurement errors can be detected in real time, and an on-line self-diagnosis function is realized. According to the shunt-based dual-path conditioning current sensor provided by the invention, the Hall element and shunt dual-path conditioning are combined, so that common cause failure is avoided, and the measurement accuracy and reliability are improved; two-way synchronous detection is adopted, faults can be judged when deviation is large, modules can be replaced conveniently, and the self-diagnosis capacity and safety are enhanced.

The invention discloses a low-cost Hall effect accelerator plume characteristic simulation method. The method comprises the steps that the structure size and working parameters of a Hall effect accelerator are acquired; establishing a discharge channel and plume region model of the Hall effect accelerator according to the structure size and the working parameters; the method comprises the following steps: firstly, designing a low-cost discharge channel plasma model, simplifying and neglecting boundary conditions in the model by adopting a fluid method, then carrying out plume distribution trial operation and result convergence evaluation on the low-cost discharge channel plasma model, finally, analyzing and verifying plume distribution characteristics according to an early test result, and carrying out model optimization and error reduction. Finally, a Hall effect accelerator plume simulation model with certain precision, rapidness and low cost is established.

A manual user input device for translating physical movement into control signals in an electronic device such as a computer. The device has a control element which can be manipulated by the user, a base element which is movably connected to the control element in multiple degrees of freedom. The device is provided with a sensor arrangement for detecting the motion of the control element. The device has magnets and Hall effect sensors for detecting the presence and magnitude of a magnetic field using the Hall effect resulting from motion of the multiple magnets.

The invention provides a layered Van der Waals material with full-compensation ferrimagnetism and a topological Hall effect as well as a preparation method and application of the layered Van der Waals material. The chemical formula of the material is MnxCrTe2, wherein 0 lt; and x is 1. The material provided by the invention has a wide compensation temperature range, a large magnetoresistance effect, anisotropy and a topological Hall effect, is a CrTe2 intercalation ferromagnetic material doped in different proportions, and can realize optimization and continuous adjustability of performances such as magnetism, Curie temperature and Hall parameters of the material through regulation and control of mechanisms such as the doping proportion, the temperature and the magnetic field; and a material basis is provided for researching the application of the Mn intercalation CrTe2 crystal material in the field of magnetic induced storage.

The utility model discloses an intelligent water cup capable of monitoring water intake, which relates to the technical field of water cups, and comprises a cup body and a cup cover arranged at a cup opening of the cup body, a suction nozzle assembly is arranged in the cup cover, the suction nozzle assembly comprises a protective shell, an interaction control module is arranged on one side of a cavity of the protective shell, and a suction nozzle is arranged on the other side of the cavity of the protective shell. A bottom pipe opening of the suction nozzle is provided with a suction pipe extending into the cup body, and a Hall flowmeter connected with the interaction control module is arranged between the suction nozzle and the suction pipe. According to the design, the suction nozzle assembly is arranged, the Hall flow meter is arranged between the suction nozzle and the suction pipe, the water drinking amount sucked by a user is metered, a metering signal is transmitted to the interaction control module to be monitored and metered, the mode that a water drinking amount metering module is arranged in a traditional water cup is replaced, and the water drinking amount of the user can be accurately and effectively monitored; the misjudgment influence caused by external operation is reduced, and the drinking water metering and monitoring are more accurate.

This utility model discloses a monitoring matrix for monitoring water levels in dams, relating to the field of water level monitoring technology. It includes a dam sidewall with multiple extension plates installed on it. Each extension plate has a sliding groove inside, which communicates with the interior of the dam. A bracket is installed on each of the upper ends of the extension plates, located on either side of the sliding groove. A first fixed shaft is connected between two brackets, and a traction rope is mounted on the surface of the first fixed shaft. One end of the traction rope extends into the sliding groove and is fitted with a float. A longitudinal groove is formed at the upper end of the dam sidewall. This utility model, through a series of structures and the cooperation of multiple Hall effect sensors and floats, overcomes the limitations of traditional single-point monitoring. It achieves full-area coverage of dam water levels using a mechanical transmission matrix. Compared to purely electric monitoring equipment, it has lower maintenance costs and frequency, and the mechanical structure is less susceptible to the effects of extreme environments.

The utility model provides an external battery and electronic equipment for identifying the external battery. The external battery comprises: a magnetic element for generating a magnetic field greater than a preset magnetic field intensity threshold; after the external battery is connected to the electronic equipment, the electronic equipment can identify whether the external battery is provided with a coulombmeter chip or not by detecting whether a magnetic field larger than a preset magnetic field intensity threshold value is generated in the electronic equipment or not. The external battery with the coulombmeter chip is defaulted to comprise the magnetic element, and the external battery without the coulombmeter chip does not comprise the magnetic element; the electronic equipment comprises a Hall device which is used for detecting the magnetic field intensity around the Hall device, generating a Hall output signal when the magnetic field intensity around the Hall device is greater than a preset magnetic field intensity threshold value, and sending the Hall output signal to a CPU (Central Processing Unit); and the CPU is used for judging whether an external battery connected to the electronic equipment is provided with a coulombmeter chip or not by detecting whether the Hall output signal is received or not.

The application discloses an electric read-write memory device based on 180-degree flip of anti-ferromagnetic Neel vector, a preparation method and a read-write method. The electric read-write memory device comprises a substrate layer, an anti-ferromagnetic layer and a spin source layer which are sequentially stacked from bottom to top and constitute a heterostructure. The material of the substrate layer is a single crystal wafer capable of epitaxially growing the anti-ferromagnetic layer. The material of the anti-ferromagnetic layer is a collinear anti-ferromagnetic material with abnormal Hall effect or a staggered magnet with abnormal Hall effect. The material of the spin source layer has a spin current generation capability. The memory utilizes a current pulse to drive 180-degree flip of the Neel vector. The Neel vector before and after the 180-degree flip has two abnormal Hall resistance states of high and low, and can be used for storing information "0" and "1". The application not only enriches the connotation of the interaction between the spin current and the anti-ferromagnetic Neel vector, but also lays a foundation for constructing a high-density, high read-write speed and low-power nonvolatile magnetic random memory.