13 results about "Micro coil" patented technology

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 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.

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.

The application belongs to the technical field of planar motor and provides a magnetic field adjusting method for magnetic suspension planar motor. The magnetic suspension planar motor comprises a mover assembly and a stator assembly. The mover assembly comprises a mover top plate, a controller cabin, an adjustable magnetic array layer and a mover bottom plate connected from top to bottom. The adjustable magnetic array layer comprises a permanent magnet array and a magnetic field reconstruction unit. The permanent magnet array is composed of multiple permanent magnet subarray units. The magnetic field reconstruction unit is arranged in the magnetic pole gap of the permanent magnet array. Each magnetic field reconstruction unit comprises a micro soft magnetic core and a micro coil wound on the micro soft magnetic core. The controller cabin is provided with a mover controller for receiving instructions and controlling the current of the micro coil. The method is adjusted by controlling the magnetic field reconstruction unit. The application solves the problem of poor utilization of magnetic leakage field caused by the physical gap between the mover permanent magnets in the planar motor.

Tracking a pose of a portion of an anatomical structure using a bi-directional electromagnetic navigation system may include generating a signal comprising a plurality of frequencies. The signal may be received at a bi-directional coil array that comprises a plurality of bi-directional micro coils configured to both generate electromagnetic fields and detect electromagnetic fields generated by neighboring bi-directional micro coils. Each of the plurality of bi-directional micro coils may be coupled to a portion of a structure. In response to receiving the signal, an electromagnetic field may be generated at each of the plurality of bi-directional micro coils. At least one of the generated electromagnetic fields may be detected at a neighboring bi-directional micro coil of a bi-directional micro coil that is generating the at least one detected electromagnetic field. A pose of the bi-directional micro coil that is generating the at least one detected electromagnetic field may be determined.

The application discloses a multi-coil differential driving variable stiffness magnetic guide wire, which comprises an interventional guide wire body and an external control system, wherein the interventional guide wire body is composed of a super-elastic nickel-titanium alloy inner core, a polyimide insulating flexible isolation layer, a micro coil array and a common ground line topology flexible wire; the external control system is composed of an external magnetic field generating system, a main control console, an electrical control system and a medical image system DSA; the electrical control system comprises an MCU microcontroller, a high-frequency PWM signal generator, an H-bridge driving circuit and a programmable constant current source; the external magnetic field generating system comprises a six-degree-of-freedom mechanical arm and an end cylindrical neodymium iron boron permanent magnet, the six-degree-of-freedom mechanical arm is freely movable in the three-dimensional space of the operating bed area, so as to adjust the position and posture of the end cylindrical neodymium iron boron permanent magnet; the end cylindrical neodymium iron boron permanent magnet is used for generating a global space magnetic field with adjustable direction and gradient in the target blood vessel area, and provides a magnetic coupling external field for the guide wire coil; and a corresponding control method is also disclosed.

The present application relates to a kind of in-situ calibration method of coil constant of micro three-dimensional magnetic compensation coil.The coil constant of micro coil is equivalently characterized based on the idea of volume average magnetic field, and the coil constant of micro coil is calibrated reversely using large coil whose coil constant has been calibrated, which effectively improves the precision of coil constant calibration of micro coil, thereby solving the problem that coil constant cannot be calibrated using traditional fluxgate magnetometer due to the micro volume (≤1cm 3 ) of micro coil and its easy bending deformation. The method is reasonable, and the experimental operation is simple. The coil constant of micro coil can be calibrated after its assembly, which effectively improves the accuracy of magnetic field measurement of single atomic magnetometer and the consistency of magnetic field measurement among multiple probes of array atomic magnetometer, and plays a great role in promoting the development of atomic magnetometer.

The invention discloses a server data synchronization method and system, and relates to the technical field of data processing. A sliding piece is fixedly arranged on the side wall in the server cabinet body; the sliding piece is specifically composed of a sliding groove and a sliding block sliding on the sliding groove, the sliding block is fixedly installed at the bottom of the server, data are summarized in a wired and wireless mode, the data modification frequency is dynamically evaluated through an intelligent algorithm, and therefore the synchronization interval is adjusted in a self-adaptive mode, and the resource utilization rate is optimized while the data timeliness is guaranteed; afterwards, data is converted and transmitted through a high-reliability optical waveguide, and an electromagnetic array and a micro coil are innovatively adopted to carry out macroscopic displacement and micron-order precision focusing on an optical path, so that a highly stable dynamic optical signal channel is realized, and the whole process from intelligent data processing to stable and high-speed synchronous transmission is realized.

The utility model discloses a non-contact UART (Universal Asynchronous Receiver / Transmitter) communication device, which relates to the field of shared charging and comprises a transmitting end and a receiving end. The transmitting terminal comprises a first microprocessor used for generating a UART signal and outputting the UART signal to a coil driving unit; the coil driving unit is used for driving current change based on the UART signal after receiving the UART signal and outputting the current change to the micro coil; compared with the prior art, the utility model has the beneficial effects that non-contact UART (Universal Asynchronous Receiver / Transmitter) communication is realized by utilizing the micro coil (transmitting end) and the switch-type Hall device (receiving end), and transmission data is modulated and demodulated through a magnetic field, so that physical contact abrasion is avoided, and the service life of equipment is prolonged; compared with wireless communication schemes such as Bluetooth, WiFi and the like, the cost of the micro coil and the Hall device is far lower than that of a Bluetooth module and a WiFi module; the method is directly compatible with a standard UART protocol, and the existing charge pal main control logic does not need to be modified

This invention discloses a back EMF detection circuit for a brushless motor controller used in automotive cooling fans, relating to the field of motor technology. Key technical features include a stator with a rotor rotatably connected to its center. A circuit board is mounted on the top of the stator, and a miniature coil is mounted on the circuit board. A lubrication device is rotatably connected to the center of the rotor. The circuit board also integrates a back EMF detection circuit, which includes a signal sampling unit, a filtering and shaping unit, and a comparison and judgment unit connected in sequence. The miniature coil is electrically connected to the output of the back EMF detection circuit. When the comparison and judgment unit detects a back EMF signal indicating that the rotor is in an inertial rotation or driven by airflow, it triggers the miniature coil to operate. This invention accurately identifies recoverable kinetic energy states through the back EMF detection circuit, converting the mechanical energy of wind-driven or inertial rotation into control signals to drive the lubrication, heat dissipation, and dust removal systems in synergy.

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.

This invention discloses a hybrid power supply and intelligent energy consumption scheduling system and method based on photoconductive film. It integrates multiple power supply units, including photoelectric generation, electromagnetic induction, and micro-energy storage batteries, and performs intelligent energy consumption scheduling based on scene priority and real-time user status. The system includes a unified identity authentication center, multiple power supply units, a power supply status monitoring module, a scene priority identification module, an energy consumption scheduling module, a low-power management module, and a power supply redundancy guarantee module. The system loads user-preset personalized scheduling strategies through identity recognition. The photoelectric generation module uses flexible thin-film solar cells with a conversion efficiency of over 15% under standard test conditions; the electromagnetic induction module uses micro-coils; and the energy storage battery uses solid-state thin-film batteries with a capacity of 10-50mAh. Scene priorities are divided into five levels, with high-priority scenes prioritizing stable power supply (energy storage battery) and low-priority scenes prioritizing ambient energy harvesting. The low-power management module automatically enters deep sleep mode when preset low-power conditions are met (including at least one of continuous no user interaction, lowest scene priority, and light intensity below a threshold), reducing power consumption by 95%. In the event of a main power supply unit failure, a backup unit is automatically switched over within 10ms. This invention solves the problems of insufficient power supply to photoconductor films, low efficiency of multi-source power supply coordination, and unreasonable energy consumption distribution. It is the core infrastructure for the intelligent operation of photoconductor films.

The invention discloses a dual-mode magnetic control guide wire based on permanent magnet-electromagnetic hybrid drive. The dual-mode magnetic control guide wire comprises a guide wire (1-2), a permanent magnet (1-1) and a micro coil (1-3), wherein the permanent magnet (1-1) is installed at the head end of the guide wire (1-2), the magnetization direction of the permanent magnet (1-1) is arranged in the axial direction of the guide wire (1-2), the miniature coil (1-3) is installed on the side, opposite to the movement direction of the guide wire (1-2), of the permanent magnet (1-1), and the miniature coil (1-3) is wound by multiple circles of wires. The head end of the guide wire (1-2) is provided with a fixed magnetic moment source and a controllable magnetic moment source at the same time. The invention further discloses application of the dual-mode magnetic control guide wire based on permanent magnet-electromagnetic hybrid drive in interventional medical instruments.