17 results about "Microcoil" patented technology

The invention belongs to the technical field of magnetic suspension motors, and discloses magnetic suspension fan motor winding temperature monitoring equipment and an early warning method. The method comprises the following steps: laminating a preset temperature-sensitive ferromagnetic material and a magnetic suspension fan motor stator iron core according to a preset process to obtain a composite iron core; deploying a high-frequency excitation system on the composite iron core, adjusting the number of turns of a micro-coil of the high-frequency excitation system according to the target magnetic field intensity, collecting real-time excitation current, and analyzing to obtain magnetic induction intensity; analyzing the magnetic induction intensity through multi-physics field coupling iteration to obtain a winding three-dimensional temperature field; performing temperature gradient analysis on the three-dimensional temperature field, performing temperature early warning according to an analysis result, and dynamically adjusting motor operation parameters; according to the invention, the comprehensiveness of temperature monitoring of the magnetic suspension fan motor winding, the timeliness of early warning and the accuracy of cooling control are effectively improved, and safe and stable operation of the motor under complex working conditions is guaranteed.

Tracking a pose of a portion of an anatomical structure using an inverted-direction electromagnetic navigation system may comprise generating a signal comprising a plurality of frequencies. The signal comprising the plurality of frequencies may be received at a transmitter coil array. The transmitter coil array comprises a plurality of transmitting micro coils. Each of the plurality of transmitting micro coils is coupled to a portion of an anatomical structure of a patient. In response to receiving the signal comprising the plurality of frequencies, an electromagnetic field may be generated at each of the plurality of transmitting micro coils based on the received signal. Each of the generated electromagnetic fields may be detected at a receiver coil array comprising at least one receiving coil. A pose of at least one of the plurality of transmitting micro coils may then be determined.

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.

An embolic coil implant system is provided that includes a microcoil having a portion that includes one or more sets of rings. The rings of each of the one or more groups continuously intersect one another in one cycle, collectively forming a three-dimensional shape. A shape setting device includes a three-dimensional (3D) body having a curved surface and a plurality of winding members extending from the curved surface of the 3D body and arranged in a plurality of groups. The winding members of each of the plurality of groups are configured to allow the microcoils to be wound to form loops, and adjacent groups of the winding members share the winding members to allow the loops formed by the adjacent groups to cross each other. A method of manufacturing an embolic device is also provided.

The application provides a micro-coil probe and a preparation method thereof and an anisotropic neuromagnetic regulation device. The micro-coil probe comprises at least one probe structure, the probe structure comprises a first electrode part at both ends of a wire, a contact part at a middle region of the wire, and a first connecting part for connecting the contact part and the first electrode part, and the contact part has an asymmetric geometric shape; wherein in the case that the probe structure is connected to a transient excitation, an induced electric field with anisotropy is generated at the contact part.

The utility model relates to a miniature loudspeaker, comprising an induction chip which is manufactured through a semiconductor manufacturing process and is connected with a vibrating diaphragm; the control chip is manufactured through a semiconductor manufacturing process and is electrically connected with the sensing chip; a gap for the sensing chip to bear the vibration diaphragm to move is formed between the magnetic element and the sensing chip; wherein the control chip is used for receiving an electrical signal, the polarity of the electrical signal is changed and input to the sensing chip so as to form a variable magnetic field on the sensing chip, a force for driving the vibrating diaphragm to move is formed between the magnetic element and the sensing chip, and the moving vibrating diaphragm generates sound waves output by the miniature loudspeaker. An induction chip formed by a micro coil element is manufactured through a semiconductor manufacturing process, and the purpose of microminiaturization of the loudspeaker is achieved.

An embolic coil implantation system is provided, including a microcoil having a portion comprising one or more sets of loops. The loops of each of the one or more sets continuously intersect one another in a cycle, collectively forming a three-dimensional shape. A shape setting device includes a three-dimensional (3D) body having a curved surface and a plurality of winding members extending from the curved surface of the 3D body and arranged in a plurality of sets. The winding members of each of the plurality of sets are configured to allow the microcoil to be wound to form loops, and adjacent sets of winding members share winding members to allow loops formed by the adjacent sets to cross one another. A method of manufacturing an embolic device is also provided.

The application belongs to the technical field of magnetic suspension motor, and discloses a magnetic suspension fan motor winding temperature monitoring device and a warning method; the method comprises the following steps: laminating a preset temperature-sensitive ferromagnetic material and a magnetic suspension fan motor stator core according to a preset process to obtain a composite core; deploying a high-frequency excitation system on the composite core, adjusting the number of turns of the micro coil of the high-frequency excitation system according to a target magnetic field intensity, collecting real-time excitation current, and analyzing to obtain magnetic induction intensity; analyzing the magnetic induction intensity through multi-physical field coupling iteration to obtain a winding three-dimensional temperature field; performing temperature gradient analysis on the three-dimensional temperature field, performing temperature warning according to the analysis result, and dynamically adjusting motor operating parameters; the application effectively improves the comprehensiveness of magnetic suspension fan motor winding temperature monitoring, the timeliness of warning and the accuracy of cooling control, and guarantees the safe and stable operation of the motor under complex working conditions.

An occlusion device formed of a microcoil having a three-dimensional relaxed state employing open looped portions interposed between closed loop portions. Planes defined by sequentially formed open looped and closed loop portions are neither coincident nor parallel to one another.

This invention discloses a high-efficiency energy-saving transmission device and a nano-sand mill, relating to the field of sand mill technology. It includes: a high-frequency alternating magnetic field generating ring, which is composed of a device shell and a micro-coil array uniformly installed on the inner wall of the device shell; and a multi-level piezoelectric fiber composite material ring disposed inside the high-frequency alternating magnetic field generating ring, which is composed of a flexible epoxy matrix and piezoelectric ceramic fibers embedded in the flexible epoxy matrix arranged in an array along the circumferential and axial directions. The flexible epoxy matrix is ​​connected to the device shell via a connecting plate. This invention can achieve integrated vibration energy recovery and active suppression, reducing vibration damage and achieving the dual goals of energy saving and stable operation. It also features a dual-mode energy storage (electric and mechanical) and dual-path energy recovery energy saving mode, making the energy saving path more efficient.

This invention discloses an adaptive initialization system and method for a Hall sensor based on closed-loop feedback, belonging to the fields of integrated circuit design and magnetic sensor technology. The system is integrated within the Hall sensor integrated circuit and includes a Hall semiconductor sensing unit, a microcoil circuit unit, a microcoil driving circuit unit, a compensation and signal conditioning circuit unit, an analog-to-digital converter unit, a power management unit, and an initialization control logic unit. In initialization mode, the initialization control logic unit continuously acquires the Hall output value, compares it with a preset reference value to generate an error signal, and dynamically adjusts the direction and magnitude of the microcoil current through closed-loop feedback until the Hall output converges within the tolerance range of the reference value. This invention requires no external microprocessor intervention, realizing on-chip closed-loop adaptive initialization across the entire "sensing-decision-execution" chain. It supports multiple modes such as automatic power-on, external enable, and over-limit re-triggering, and has advantages such as high initialization accuracy, fast response speed, low system resource consumption, and ease of industrialization. It can be widely applied in automotive electronics, industrial servo systems, and low-cost IoT devices.

The present invention discloses a magnetic compensation system structure for a miniature atomic inertial device, comprising: a Y-axis microcoil pair, a Z-axis microcoil pair, an X-axis microcoil pair, a support and limit base, and a printed circuit board. The X-axis and Z-axis microcoil pairs are perpendicular to the printed circuit board, while the Y-axis microcoil pair is parallel to the printed circuit board. The microcoil pairs for the X, Y, and Z axes are nested and orthogonal to each other and placed on the support and limit base to generate a magnetic field to compensate for static residual magnetism and magnetic field disturbances. The support and limit base is located on the printed circuit board, accommodating an air chamber and providing positional support for the three-axis microcoil pairs. The printed circuit board is located at the bottom layer of the structure and provides peripheral electrical connections and current transmission for the three-axis coil pairs. Compared to the traditional miniaturization method of proportionally reducing PCB coils, the present invention provides an effective structural solution with the advantages of higher processing accuracy, lower cost, and higher positioning and alignment accuracy.

This invention discloses a room-temperature mode-selective physical reservoir computation method, belonging to the field of neuromorphic computing. The method is based on an artificially synthesized antiferromagnetic skyrmion spring oscillator, which electrically selects different intrinsic dynamic modes to adapt to different computational tasks: an in-plane alternating current drives a large-amplitude oscillation mode, providing strong nonlinearity to optimize signal conversion tasks; an out-of-plane alternating magnetic field drives a breathing mode, providing strong short-term memory to optimize time series prediction tasks. The device integrates fully electrically driven, multi-channel parallel readout, voltage-controlled magnetic anisotropy stabilization, and planar microcoil excitation units, achieving full on-chip integration of mode selection, signal processing, and stability control. This invention solves the problems of nonlinearity and memory coupling, poor task adaptability, and insufficient room-temperature stability in physical reservoirs, achieving fast, high-precision, and reconfigurable processing of multiple tasks at room temperature using a single device.

The invention, which relates to the technical field of micro-nano operation and intelligent control, discloses a sensing, planning and closed-loop control system for a plurality of magnetic-driven micro-robots, comprising a micro-coil array, a control module, a magnetic sensing module and a plurality of micro-robots. The working area is laid in a hexagonal mode, inevitable overlapping / blank zones during splicing of the circular subareas are avoided, and covering is more uniform; the hexagonal grid has six equivalent adjacent directions at any point, and the direction cost is more balanced, so that a smoother discrete path with fewer inflection points can be generated, approximation to arc / oblique motion under the same discrete resolution is closer to Euclidean metric, the average path is shorter, and the control instruction switching frequency is lower.

This application relates to a temperature-drift-resistant magnetic sensor and a magnetic field measurement method. The magnetic sensor includes: a substrate; a helical microcoil disposed on the substrate to generate a stable magnetic field environment; a plurality of magnetically sensitive units disposed at different radii of the microcoil, each magnetically sensitive unit outputting a first output signal under the influence of the magnetic field and temperature; a non-magnetically sensitive unit disposed on the microcoil, the non-magnetically sensitive unit outputting a second output signal under the influence of temperature; and a signal processing circuit connected to each of the magnetically sensitive units and the non-magnetically sensitive units, used to output a measured value based on at least one of the first and second output signals. This method can improve the measurement accuracy and reliability of the magnetic sensor.

This invention discloses a high-speed motor speed detection method based on MEMS microcoils, relating to the field of high-speed motor speed detection. The method includes: non-contactly placing at least one MEMS microcoil sensor at a key electromagnetic field coupling position on the high-speed motor body or drive circuit; the MEMS microcoil sensor outputting a raw induced voltage signal; conditioning the raw induced voltage signal; using an analog-to-digital converter to perform high-speed synchronous sampling of the conditioned signal to obtain a digital signal sequence; extracting the speed characteristic frequency; calculating the real-time motor speed based on the speed characteristic frequency and preset motor parameters through a preset mapping relationship, and outputting the calculation result. This invention employs a miniaturized coil sensor based on MEMS technology, combined with intelligent signal processing algorithms, to achieve high-precision, high-response speed measurement in ultra-high-speed scenarios.

The invention relates to a glass substrate through hole metal filling method which comprises the following steps: S1, providing a glass substrate with a through hole and a micro-coil array, and placing the glass substrate and the micro-coil array in a vacuum coating cavity, so that a first surface of the glass substrate is adjacent to a target material, and a second surface of the glass substrate is adjacent to the micro-coil array; s2, the coating cavity is vacuumized, argon is introduced into the coating cavity, after the magnetron sputtering condition is met, the micro-coil array is started, preset current is introduced, and magnetic lines penetrating through all the through holes are generated; and S3, a magnetron sputtering process is started to generate plasmas of metal ions and argon ions, and metal filling in the through hole is achieved through guiding of magnetic lines of force. The directional magnetic field is constructed through the micro-coil array, the problems that high-aspect-ratio through hole metal deposition is uneven, and the hollow defect exists in a traditional technology are solved, the through hole filling rate and the film thickness uniformity are improved, low resistance, high compactness and high binding force of a metal layer are guaranteed, production efficiency and mass production stability are considered, and the method is suitable for TGV glass substrate machining in the fields of 5G, AIoT, micro LEDs and the like.