294 results about "Hall element" patented technology

The three-axis Hall magnetic sensing chip comprises a magnet gathering body, a first Hall element group and a second Hall element group, the first Hall element group and the second Hall element group are arranged in a plane at intervals, the magnet gathering body is arranged on Hall elements, and the orthographic projection of the magnet gathering body on a Hall plane has a first direction symmetry axis and a second direction symmetry axis which are orthogonal. The first Hall element group comprises two first Hall elements which are connected in a contrast difference mode, wherein the magnetic induction centers of the two first Hall elements are located on a first-direction symmetric axis and are symmetrically arranged relative to a second-direction symmetric axis. The second Hall element group comprises two second Hall elements which are located on the same side of the first direction symmetry axis and are symmetrically arranged relative to the second direction symmetry axis, and the magnetic induction centers of the two second Hall elements are perpendicular to the connecting line between the orthogonal intersection points of the first direction symmetry axis and the second direction symmetry axis; the magnetism gathering body is located on one side of the connecting line of the two magnetic induction centers. According to the invention, a high inter-axis signal rejection ratio is realized, and the Z-axis signal can be directly output.

The invention relates to the technical field of motor control, in particular to a harmonic gear motor based on double encoders and a control method thereof, which comprises the following steps: processing linear Hall element signals output by a rotor shaft encoder, including high-frequency noise suppression, direct-current bias calibration, amplitude normalization and phase difference calibration, to obtain accurate orthogonal signals; a double-dq rotating coordinate system phase-locked loop algorithm is adopted, the calibrated orthogonal signals are processed, and the high-precision real-time angle of the motor rotor is obtained through calculation; based on a signal of an output shaft encoder, matching with a preset angle partition of the harmonic reducer, and identifying an absolute position sector where the current output shaft is located; the rotor angle and the sector angle of the output shaft are fused to generate a high-resolution absolute angle of the output shaft; and based on the fused angle information, a magnetic field orientation control algorithm is adopted to drive a motor, and closed-loop control is achieved.

A Hall current sensor, comprising: a magnetic core (10), wherein an air gap (11) is formed in one side of the magnetic core (10); a Hall element (12), wherein the Hall element (12) is disposed in the air gap (11); and a ferrite structure, wherein the ferrite structure is disposed in the air gap (11), and the ferrite structure clamps the Hall element (12) in the air gap (11), so as to reduce the air gap of a magnetic circuit and keep the Hall element (12) perpendicular to the direction of a magnetic induction line in the air gap (11). The Hall current sensor can significantly improve the detection precision, anti-interference capability and position error resistance capability of open-loop and closed-loop magnetic sensors in leakage current, small current and other weak magnetic scenarios, thereby realizing low-cost, high-precision and fast-response current sensing.

The utility model provides a prism anti-shake assembly which is installed in a prism cabin and comprises a control circuit board, a rotating frame which can swing left and right and is installed in the prism cabin, and a prism assembly which can swing in a pitching mode and is installed in the rotating frame. Driving magnetic steel and sensing magnetic steel are arranged on the rotating frame; the control circuit board is provided with a gyroscope, an outer driving coil which is opposite to the driving magnetic steel up and down, and an outer Hall element which is opposite to the sensing magnetic steel up and down; the prism assembly is provided with an inner shaft circuit board, and the inner shaft circuit board is provided with an inner drive coil vertically opposite to the drive magnetic steel and an inner Hall element vertically opposite to the sensing magnetic steel. According to the utility model, independent magnetic steel is respectively adopted for driving and detecting the prism, so that the mutual interference of signals is reduced, the output noise of the Hall element is reduced, the anti-shake precision of the device is improved, and meanwhile, the device has the advantages of small overall appearance, high modularization degree, convenience in assembly and debugging and high cost performance.

The application relates to the technical field of conveying devices, and discloses a roller motor, which comprises a roller and a driving piece, the driving piece is used for driving the roller to rotate, and the roller motor further comprises: a first detection assembly, which comprises a first magnet and a first Hall element, the first magnet is fixedly connected to the rear end of an output shaft of the driving piece, the roller is fixedly connected to the front end of the output shaft of the driving piece, and the first Hall element is used for sensing the magnetic field change of the first magnet to detect the rotating speed of the output shaft; and a second detection assembly, which comprises a second magnet and a second Hall element, the second magnet is fixedly connected to the roller, and the second Hall element is used for sensing the magnetic field change of the second magnet to detect the rotating speed of the roller. The roller motor can detect the rotating speeds of the driving piece and the roller simultaneously, and the control precision of the rotating speed of the roller can be improved in combination with a control mechanism.

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 provides a high-sensitivity temperature compensation Hall switch device. The high-sensitivity temperature compensation Hall switch device comprises a Hall switch module, a temperature compensation module, a signal processing module and a power management module. The Hall switch module comprises a Hall element, a pre-amplifier and a comparator and is used for detecting and amplifying an external magnetic field signal; the temperature compensation module comprises a temperature sensor, a compensation controller and a compensation element and is used for realizing accurate temperature compensation; the signal processing module comprises a filter and a logic control unit, and is used for filtering noise and generating a final switch control signal; the power management module comprises a main power supply and a standby power supply to ensure stable power supply. The device can improve the temperature compensation precision, enhance the switch sensitivity, reduce the power consumption, and meet the high-precision and high-reliability requirements of modern electronic equipment.

A waterproof oral irrigator including an oral irrigator housing which is provided with a sliding recess on an outer wall thereof; a push switch slidably fitted with the sliding recess and provided with a magnetic element; and a control circuit board arranged inside the oral irrigator housing and being provided with a plurality of Hall elements. A plurality of Hall elements are sequentially disposed at intervals along a sliding direction of a push switch. When the push switch slides along the sliding recess, the magnetic element can be driven to move to positions sensed by the plurality of Hall elements in sequence. Since the outer wall of the oral irrigator housing is provided with the sliding recess, and the sliding recess is not communicated with the interior of the oral irrigator, so that the waterproof performance of the oral irrigator can be greatly improved.

The invention relates to the field of magnetic suspension motor driving control, and discloses a high-reliability motor commutation method based on same-frequency displacement conversion of a magnetic suspension rotor, and the method comprises the following steps: collecting a multi-channel rotor displacement signal of a magnetic suspension bearing system; carrying out same-frequency positive-sequence component extraction and phase locking calculation to obtain a rotor space angle position estimation value; multiple paths of redundant rotor angular position signals are constructed, and main rotor space angular position signals are generated; executing initial alignment and error correction of a motor rotor angle, and locking an angle compensation value in a closed loop mode based on the waveform change rate of the direct current bus current at the pre-estimated commutation moment; synthesizing the motor commutation angle, and generating a pulse width modulation signal to drive the motor to operate. A magnetic suspension rotor displacement signal is processed through a second-order generalized integrator cascade instantaneous symmetric component method, so that the effect of high signal-to-noise ratio rotor position detection is realized by directly utilizing an existing magnetic bearing displacement sensor under the condition that a Hall element or a photoelectric encoder does not need to be additionally arranged.

The invention relates to the technical field of Hall sensors, and provides a Hall element with a triple isolation structure and a preparation method thereof.The Hall element comprises two pairs of Hall contact areas participating in electrical connection and oxide isolation structures located on the two sides of the Hall contact areas and having a certain gap distance. The oxide buried layer completely isolates the Hall plate area in the vertical direction, the Hall plate is completely isolated from the outside through the isolation structure and the oxide buried layer, external direct current interference is reduced to the maximum extent, meanwhile, the thickness and the current path of the Hall plate are controlled, and the effect of reducing noise interference while the sensitivity is improved is achieved. A three-circle surrounding structure is formed by utilizing a P well in contact with the side face of a Hall plate, a PBL in contact with the vertical bottom of an oxide buried layer and connected with the P well on the side face of the Hall plate, an NBL tightly attached to the lower surface of the PBL, an N well connected with the NBL and surrounding the Hall plate and the P well, and a P well connected with a substrate and surrounding the outermost layer, and Hall voltage changes caused by substrate noise and EMI electromagnetic interference are prevented.

Method and apparatus for a 3D sensor having die Hall element clusters located on first and second die. In an embodiment, a sensor IC package includes a first die having first, second, and third Hall clusters having different axes of magnetic field sensitivity and a second die having a fourth Hall cluster having sensitivity in the first and third axes of sensitivity. The sensor provides 3D field sensing for stroke, end of shaft and side shaft sensing applications.

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.

The utility model provides a speed sensor which comprises a PCB and a sensor circuit arranged on the PCB, the sensor circuit comprises a power-assisted control unit MCU, a Hall element U1 and a Hall element U2, the Hall element U1 is connected with the input end IN1 of the power-assisted control unit MCU, the Hall element U2 is connected with the input end IN2 of the power-assisted control unit MCU, the Hall element U1 is connected with the input end IN1 of the power-assisted control unit MCU, and the Hall element U2 is connected with the input end IN2 of the power-assisted control unit MCU. The output end OUT of the power-assisted control unit MCU outputs a control signal Signal, the Hall element U1 and the Hall element U2 are arranged in tandem in the rotating direction of the rotating shaft, and the triggering magnetic field intensity of high and low level conversion output by the Hall element U1 and the Hall element U2 is + / -5Gs. The two Hall elements are arranged in tandem, so that the rotating direction of the middle shaft can be judged while the speed is detected, and a wrong power-assisted signal is prevented from being output.

The application provides a composite sensor and a detection method for pipeline nondestructive testing, relates to the technical field of pipeline nondestructive testing, and comprises a magnetic base of a cylindrical structure; the magnetic base comprises a circular ring part and a center part; an electromagnetic ultrasonic coil; the electromagnetic ultrasonic coil comprises a first coil and a second coil which are interlaced and wound; a plurality of Hall elements are uniformly arranged in the circumferential direction with the center part as the center; and a controller is configured to generate a first control signal based on a magnetic flux leakage signal, to form a target excitation circuit based on the electromagnetic ultrasonic coil, to make the target excitation circuit form electromagnetic ultrasonic waves for detecting a pipeline to be detected, to obtain an ultrasonic echo based on the target excitation circuit, and to generate a detection result according to the magnetic flux leakage signal and the ultrasonic echo. The application realizes omnidirectional magnetic flux leakage detection through the annular magnet structure matched with the circumferentially arranged Hall elements; and through the specific combination of the coil connection mode and the timing control logic, various electromagnetic ultrasonic detection modes can be considered.

A linear Hall-based eccentricity diagnosis method and detection system for a permanent magnet motor. First, three linear Hall elements are mounted in stator slots at the same space interval, respectively; second, analog signals output by the three-phase linear Hall are converted into digital signals by means of a digital signal processor, and the digital signals are converted into a quadrature signal by means of linear combination; then, a negative sequence signal and a sideband signal are extracted from the quadrature signal by means of a complex factor filter; then the amplitude of the negative sequence signal and the amplitude of the sideband signal are extracted by means of synchronous reference frame phase-locked loops as a static eccentricity indicator and a dynamic eccentricity indicator; finally, percentages representing the degrees of eccentricity are calculated from the static eccentricity indicator and the dynamic eccentricity indicator in the digital signal processor.

The utility model relates to the technical field of flow monitoring, in particular to a Hall flow meter, which comprises a shell, a Hall element, a Hall element, a Hall element, a Hall element, a Hall element and a Hall element, the shell is provided with a flow channel, and the inner peripheral wall of the shell is convexly provided with a stop part; the flow guide cylinder is arranged in the flow channel, and the peripheral wall of the flow guide cylinder abuts against the stop part; the flow impeller is rotatably inserted into one side, opposite to the water inlet end of the flow channel, of the guide cylinder; wherein the outer peripheral wall of the shell is provided with a Hall circuit, the Hall circuit is provided with a Hall element, blades of the flow impeller are provided with magnetic parts, and the Hall element is configured to sense a magnetic field generated by the magnetic parts. The utility model aims to provide a Hall flow meter and aims to reduce the assembly difficulty of the Hall flow meter.

A semiconductor package includes a semiconductor chip having Hall elements built therein, and external terminals arranged on one surface side of the semiconductor chip. A first Hall element and a second Hall element are arranged to be point-symmetrical with respect to a center point of the semiconductor package in a plan view. The first Hall element is at least partially covered by a first external terminal among first external terminals in a plan view, and the second Hall element is at least partially covered by a second external terminal among second external terminals in a plan view. A first region covered by the first external terminal of the first Hall element in a plan view and a second region covered by the second external terminal of the second Hall element in a plan view are point-symmetrical with respect to the center point of the semiconductor package in a plan view.

The invention relates to the technical field of electronic throttle valves, in particular to a method and system for recognizing the opening position of a valve plate through a Hall sensor, and the method comprises the steps: obtaining a control signal on a brushless motor, and controlling the Hall sensor to collect a magnetic field signal to obtain a magnetic signal sequence after the control signal is collected; extracting a magnetic pole inversion point according to the magnetic signal sequence, and determining a motor rotation angle according to the magnetic pole inversion point; and the valve plate opening is generated according to the motor rotation angle. In order to solve the problem that in the prior art, two rotating speed sensors need to be arranged in an electronic throttle valve, the cost is high, in the scheme, the rotating speed sensors are replaced with Hall sensors, the layout positions of the Hall sensors on a substrate are adjusted, and the Hall sensors are arranged close to a Hall element at the front end of a worm; therefore, the opening angle of the valve plate can be accurately measured after the sensor is simplified, and the product cost is reduced.

The utility model relates to a Hall element protection seat, which comprises a seat body with an inner cavity, mounting plates are respectively arranged on two sides of the periphery of the seat body, a mounting seat is arranged on the side surface of the mounting plate on one side, a concave cavity is arranged on the mounting seat, and a sinking cavity for accommodating a Hall element is arranged at the rear end of the concave cavity. A wire outlet hole is formed in the front end part of the mounting seat at the front end of the concave cavity; and a wire of the Hall element can extend to the front end of the concave cavity along the bottom surface of the concave cavity after being bent and then is led out from the wire outlet hole. According to the utility model, the lead of the Hall element is led out from the wire outlet hole at the front end of the concave cavity, and the peripheral wall of the wire outlet hole is used for limiting the lead, so that the lead cannot be randomly scattered; since the lead wire and the bottom surface of the concave cavity do not need to be bonded by glue, a gluing process in a conventional structure can be omitted, the cost is reduced, the overall aesthetic property of the protection seat is improved, and the lead wire does not fall off in the use process, so that the normal work of the Hall element is effectively ensured.

The utility model relates to a control mechanism and a window opener. The control mechanism is used for the window opener. The window opener comprises a machine shell and a sliding motion driving assembly, the control mechanism comprises a control assembly, the control assembly comprises at least one first Hall element and at least one second Hall element, and an interval space exists between the first Hall element and the second Hall element. And a connecting line between the first Hall element and the second Hall element in the projection direction of the horizontal plane is parallel to the central axis of the motor. The driving assembly switches the manual position and the automatic position of the window opener in a sliding mode so that manual driving and automatic driving of the window opener can be achieved. The first Hall element and the magnetic part are used in cooperation to determine the position of the driving assembly, so that the corresponding operation state is output through the control assembly, and a user can conveniently judge operation parameters of the window opener.

This invention provides a protective box based on a Hall current sensor, relating to the field of Hall current sensors. The protective box assembly includes a housing, a cover plate, a back plate, and heat dissipation fins. The cover plate is located on the front of the housing, the back plate is fixed to the back of the housing, and the heat dissipation fins are fixed to both sides of the housing. A magnetic core, a Hall element, an integrated circuit, and a compensation coil are installed inside the housing. This invention provides protection for the components by using a housing and cover plate. Unlike resin encapsulation, this physical structure protection prevents aging and cracking due to environmental changes. The housing and cover plate provide stable physical protection for the internal magnetic core, Hall element, integrated circuit, and compensation coil. The heat dissipation fins on both sides of the housing help dissipate heat generated by the components inside the protective box, reducing the risk of damage to the protective structure and sensor components due to excessive temperature.

The invention provides a Hall current sensor magnetic core structure with a high signal-to-noise ratio. The Hall current sensor magnetic core structure comprises a magnetism gathering ring, a framework, an operational amplifier, a rivet, a Hall element, a PCB and a grounding copper column. The eight magnetic sheets are staggered and laminated left and right in the trapezoid groove of the framework for one-time forming, the wiring groove of the framework optimizes wiring of the secondary coils, extra electromagnetic signals caused by mutual coupling between the secondary coils are avoided, and accurate alignment of the framework and the PCB is achieved. The direct connection mode of precise rivet framework integration and copper column PCB spot welding replaces all heavy external shielding and unreliable mechanical contact, the contradiction of high signal-to-noise ratio, high reliability and miniaturization is fundamentally solved, the anti-interference capacity is built in the magnetic core body and achieved through extremely simple and reliable physical connection, and an external additional structure is not needed.

The utility model provides a circuit structure of a Hall current sensor chip and the Hall current sensor chip. The circuit structure comprises a Hall element, an amplifier, a first comparator, a second comparator and a programmer, the Hall element is used for sensing the detection current and generating a voltage signal related to the detection current; the amplifier is used for amplifying the voltage signal; the first comparator is used for comparing the amplified voltage signal with a reference source, judging signal integrity and generating a comparison signal; the second comparator is used for comparing the comparison signal with a reference signal, judging the signal amplitude and generating an output signal; and the programmer is used for adjusting the output sensitivity and / or the static output voltage. The circuit has the technical effects that the output precision is improved, the output stability is improved, the circuit structure complexity is reduced, and the output sensitivity and / or the static output voltage are / is adjustable, so that the product performance is improved and the cost is reduced in final application.

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.

The invention relates to signal detection processing, in particular to an extremely weak signal pickup and amplification device, which comprises a magnet, a coil is wound on the magnet, a magnetic gap is formed in the magnet, the sectional area of the magnet is suddenly reduced when approaching the magnetic gap, and a Hall element is arranged at the magnetic gap; according to the technical scheme provided by the invention, the defect that extremely weak signals are difficult to effectively pick up and amplify in the prior art can be effectively overcome.

The invention relates to the technical field of magnetic encoders, in particular to a magnetic encoder applied to a vernier magnetic ring, which comprises two linear Hall arrays, namely a first linear Hall array and a second linear Hall array, each of the first linear Hall array and the second linear Hall array comprises four linear Hall elements; the analog multiplexer is used for acquiring the output of the eight linear Hall elements; one or two analog-to-digital converters for obtaining the output of the analog multiplexer; and the microcontroller is used for obtaining the output of the analog-to-digital converter and obtaining an absolute angle value according to the vernier principle. According to the method, the hardware cost is remarkably reduced, and a feasible path is provided for popularization of a vernier magnetic ring angle detection technology in a cost-sensitive scene.

The utility model discloses a triangular sensor structure of a computerized flat knitting machine, which is characterized in that a triangular motor shaft of the computerized flat knitting machine is fixedly provided with a sensing wheel, the sensing wheel is at least provided with a first Hall magnetic steel, and the first Hall magnetic steel is correspondingly sensed with a first Hall element; an output pin of the first Hall element is respectively connected with the Hall chip and the first light emitting diode; the triangular motor shaft drives the induction wheel provided with the first Hall magnetic steel to rotate synchronously, the distance between the first Hall magnetic steel and the first Hall element changes along with the rotation state, and the first Hall element is selectively conducted based on the change. An output pin signal of the first Hall element is switched between a high level and a low level, so that a Hall chip connected with an upper computer realizes triangular zero detection, and a first light emitting diode realizes triangular state feedback; the LED lamp is low in cost, reliable in performance, good in heat dissipation performance and convenient to install.

A sensor device includes at least one integrated magnetic sensor structure having: a semiconductor substrate; a magnetic flux concentrator IMC disposed on top of the semiconductor substrate, the IMC having a predefined shape with an elongated portion extending in a first direction parallel to the substrate; a horizontal Hall element situated under a centre of the IMC; a processing circuit connected to said horizontal Hall element, and configured to provide a signal or a value indicative of at least one magnetic field gradient or a signal or value derived therefrom.

The application discloses a non-contact drive chain elongation detection method and system based on a Hall proximity switch, relates to the technical field of chain drive state detection, and derives a phase alarm threshold value by acquiring basic parameters of a Hall proximity switch group and a standard pitch of a chain, deploys a Hall component at a directly opposite detection position of a metal drive part of the chain, and relies on a running square wave signal to solve a phase difference in real time and compare the phase difference with the threshold value; due to the non-contact detection characteristics of the Hall element based on electromagnetic induction, the periodic movement of the metal part can be stably perceived in harsh environments such as oil stains, dust and moisture, the defects of laser light path contamination or contact type measurement abrasion are avoided, meanwhile, the phase difference algorithm can accurately quantify the chain elongation, real-time and low-loss online detection is realized, and therefore the technical problem that the elongation of the drive chain is difficult to be detected in real time, accurately and with low loss in a severe industrial scene is effectively solved.

The application relates to the technical field of encoders, in particular to a rotary magnetic ring encoder and a method for detecting the absolute angle of the magnetic ring encoder. The rotary magnetic ring encoder comprises a second plurality of pairs of pole magnets, a first plurality of pairs of pole magnets, a single pair of pole magnet conductor assembly and a first group of Hall elements, a second group of Hall elements and a third group of Hall elements; the single pair of pole magnet conductor assembly has a first tooth-shaped part and a second tooth-shaped part, the first group of Hall elements and the second group of Hall elements are arranged adjacent to the first plurality of pairs of pole magnets and the second plurality of pairs of pole magnets respectively, the third group of Hall elements is arranged between the first tooth-shaped part and the second tooth-shaped part, and the three groups of Hall elements output corresponding detection signals according to the magnetic pole signals of the corresponding magnets. The rotary angle of the outermost ring magnet is calibrated by acquiring a mechanical angle with certain precision, so that the measurement precision is greatly improved, and the application is especially suitable for meeting the actual needs of angle detection of large-diameter shaft parts.