39 results about "Coil array" patented technology

The invention provides a coil array and a wireless power transmission system, the coil array comprises at least one coil structure, the coil structure comprises three coil units, and the three coil units respectively form three sides of the same triangle so as to form the coil structure; wherein each coil unit in the same coil structure is configured to allow the current flowing through the coil unit to form a current loop, and the coil units in the same coil structure are the same or different; moreover, each coil unit in the same coil structure is configured to be excited by an independent amplitude-modulated wave and obtain a driving current, so that the coil array is allowed to be configured to obtain optimal magnetic field distribution and magnetic field polarization according to different phases and current directions and form a three-dimensional rotating magnetic field.

The application discloses a kind of pipe inner wall high-pressure pulse cleaning system and method suitable for central air conditioner, it is related to pipeline cleaning technical field, including movable electromagnet coil array, for generating the magnetic field inside the elbow of pipeline, change the motion trajectory of magnetite particles;Pulse synchronous controller, for detecting the working state of pulse cleaning equipment and with pulse cleaning equipment synchronous control movable electromagnet coil array power-on time and magnetic field intensity;Eddy current buffer flow guide, the application is by movable electromagnet coil array, with pulse cleaning equipment electric connection pulse synchronous controller and install in elbow inside eddy current buffer flow guide, realizes the accurate control of magnetite particles motion trajectory in high-pressure pulse cleaning process and kinetic energy buffer, thoroughly solves the centrifugal acceleration wear problem at elbow under the premise of not reducing cleaning effect.

The application provides a coil unit and a coil array, comprising a coil body and a magnetic shielding layer; the coil body is configured to allow a current flowing therethrough to form a current loop, and the coil body comprises at least a first wire segment, a second wire segment and a third wire segment connected in sequence; the first wire segment and the third wire segment both extend along a first direction and are spaced apart along a second direction; the second wire segment extends along the second direction; and the first direction and the second direction are arranged transversely; the magnetic shielding layer has a thickness dimension along the second direction; at least part of the thickness of the magnetic shielding layer along the second direction is located between the first wire segment and the third wire segment; and the second wire segment passes through at least part of the thickness of the magnetic shielding layer along the second direction.

This invention discloses a planar motor with a hybrid arrangement of coreless coils and permanent magnets, comprising a stator, a mover, a Hall sensor array, and a controller. The permanent magnet array and the coreless coil array on the stator surface are arranged on the same plane in an alternating array. The mover structure, from the center outwards, consists of a wireless energy receiving coil, an inner ring magnet, and an outer ring magnet, achieving passive levitation through a balance of attraction and repulsion. The controller calculates the mover position using a Hall fingerprint positioning algorithm and only powers the stator edge coil group corresponding to the mover's edge magnets. When the coils on the mover overlap with the stator coils, it switches to wireless energy transmission mode to provide power to the mover. This invention enables the product to achieve self-levitation, low-power edge drive, and wireless power supply when power is off, making it suitable for various application scenarios.

The utility model relates to the technical field of electroacoustics, concretely is a kind of low-frequency amplitude enhancement and welding plate conjoined annular coil plane diaphragm, including one annular diaphragm frame, and diaphragm frame is set in the diaphragm unit, diaphragm unit is equipped with plane coil unit;Diaphragm unit includes first diaphragm and the combined second diaphragm concentric with first diaphragm, the outer diameter of second diaphragm is wider than first diaphragm, and the rigidity of first diaphragm is greater than second diaphragm;The outer edge of diaphragm frame is equipped with the flexible circuit board electrically connected with two plane coil arrays, and the end of flexible circuit board away from diaphragm frame is equipped with a pair of connecting pad.The amplitude of second diaphragm in the utility model will be significantly greater than first diaphragm, to significantly improve the low-frequency performance of diaphragm, still through flexible circuit board, connecting pad is extended to the outside of diaphragm frame, it is convenient to connect audio signal line, also can utilize earphone internal space, more convenient assembly.

The application discloses a kind of magnetic digital microfluidic system and microfluidic method, the system includes droplet control unit, magnetic core coil array on-off unit, logic control unit and signal detection unit, the droplet control unit includes microfluidic platform and magnetic core coil array, the magnetic core coil array is arranged below microfluidic platform, magnetic core coil array is connected with magnetic core coil array on-off unit, the logic control unit is connected with magnetic core coil array on-off unit, signal detection unit respectively.The application utilizes magnetic core coil array, can directly drive magnetic droplet and non-magnetic droplet in microfluidic platform, and realizes a series of operations such as control, transport, merge, distribution, heating and detection to droplet, can solve the problem that existing magnetic digital microfluidic system can only be limited to drive magnetic droplet, and biological compatibility is poor.

The invention relates to a magnetic resonance coil array (30) of a magnetic resonance system having a distributed cabling realized by a self-compensating radio frequency choke (10). The magnetic resonance coil array (30) comprises a plurality of magnetic resonance receive coils (32), an input-output unit (34) and a plurality of coaxial cables (14) interconnecting the magnetic resonance receive coils (32) with the input-output unit (34). The coaxial cables (14) comprise the self-compensating radio frequency choke (10). The self-compensating radio frequency choke (10) allows replacing conventional large volume resonant radio frequency traps used in conventional magnetic resonance coil arrays and allows implementing a distributed cabling. The self-compensating radio frequency choke (10) comprises a choke housing (12) having a toroidal outer shape and a coaxial cable (14), wherein the coaxial cable (12) is wound around the choke housing (12) in a self-compensating winding pattern. The self-compensating winding pattern provides a compensation for a B1 excitation field of the magnetic resonance system and does not require the self-compensating radio frequency choke (10) to resonate with the B1 excitation field.

This invention relates to the field of wireless charging technology, and in particular to a smart alignment method and system for wireless charging in a waterproof socket. The method involves acquiring spatial position data of the charging receiver within the charging area of ​​the waterproof socket, establishing a spatial coordinate relationship model to calculate a three-dimensional offset vector, generating a layered alignment strategy, and adjusting the excitation distribution and phase amplitude of the transmitting coil array. During strategy execution, coupled voltage waveform data is collected and frequency-domain decomposed to obtain harmonic components. The influence characteristics of the waterproof medium are identified as compensation factors to correct the offset vector. When the corrected offset vector converges, a locked state is established to create an energy transmission channel. This achieves efficient and precise alignment for wireless charging in a waterproof environment, improving charging efficiency and stability.

The present application relates to the technical field of industrial control, and particularly relates to a SMT production process quality control method and system.A SMT production process quality control system comprises a solder paste distribution situation real-time acquisition module, an electromagnetic coil array parameter adjustment module and a reinforcement learning module.The present application acquires a thermal image of a PCB board in real time by arranging an electromagnetic coil array around a reflow soldering furnace and combining an infrared thermal imaging technology, and sends the thermal image into a solder paste segmentation model for processing, so as to accurately represent the flow state of the solder paste.Based on the solder paste distribution thermal map, the system can dynamically adjust the control parameters of the electromagnetic coil array, including current intensity, current frequency and waveform, so as to accurately adjust the electromagnetic field, optimize the flowability of the solder paste, avoid excessive or insufficient accumulation of the solder paste, and reduce the risk of tin bridges and virtual welding.

The application provides a wireless charging control system, method and equipment of a vehicle and a charging station, relates to the electric vehicle charging technical field, and comprises a server, a phased coil array and a sensing component. The sensing component is used for collecting vehicle data in a wireless charging area of the vehicle. The server is used for determining a vehicle position of at least one vehicle to be charged according to the vehicle data, and controlling the phased coil array to charge the corresponding vehicle to be charged based on the vehicle position of the at least one vehicle to be charged. The application collects the vehicle data in the wireless charging area of the vehicle through the sensing component, and determines the vehicle position of the at least one vehicle to be charged according to the data by the server, and then controls the phased coil array to charge the corresponding vehicle to be charged, so that the same set of phased coil array can dynamically provide wireless charging services for multiple vehicles according to the positions of the multiple vehicles.

A magnetic resonance (MR) coil construction system includes MR coil sheets (20) comprising electrically conductive MR coil elements or MR coil element portions (22) disposed in electrically insulating sheets (26). The MR coil sheets have edges with connecting mechanisms (34, 48) configured to connect the MR coil sheets to construct an MR coil array (44).

This application provides a dome-shaped coupling mechanism and a wireless charging system for drones, along with an on-demand switching method, to address the problems of poor anti-offset capability and transmission stability in drone wireless charging systems. The coupling mechanism includes a three-dimensional transmitting coil array and a U-shaped receiving coil. The three-dimensional transmitting coil array includes a first transmitting coil of regular N-sided shape and N second transmitting coils arranged in a ring array outside the first transmitting coil. The second transmitting coils are regular M-sided coils, and their planes are set at an obtuse angle to the plane of the first transmitting coils. The first transmitting coil and the N first transmitting coils form a near-dome structure, wherein: and... This application relies on the magnetic coupling mechanism of the three-dimensional transmitting coil array and the U-shaped receiving coil, combined with a coarse coil positioning and PT-symmetric adaptive coil switching control method, to achieve efficient energy transfer under positional offset during drone charging.

A broadband electromagnetic sensor includes: an amplifier circuit having a gain of at least 26 dB over its bandwidth; and a sensing portion electrically connected to the amplifier circuit and including a coil array structure comprising a plurality of coils, wherein each of the plurality of coils has a different length from the other coils and detects a signal having a frequency within its own frequency bandwidth, such that the plurality of coils together can detect a signal having a frequency within the frequency bandwidth of the sensor, and wherein the frequency bandwidth of the sensor ranges from approximately 1 MHz to 100 MHz, enabling the sensor to detect partial discharge from a high-voltage device without physical contact with the high-voltage device.

The application discloses a kind of magnetic micro-robot parallel collaborative field navigation system, it is related to micro-nano operation technical field, and the micro resource conflict resolution scheduler MCDO in this system is based on the smooth single-machine path of dynamic evolution navigation planner DEN, the safety path constraint of conflict-aware evolutionary planner CAEP and the coil current with anti-interference control of double-field disturbance suppressor DFDS, to each magnetic micro-robot planning obstacle avoidance path and outputting multi-machine conflict-free instruction, to drive coil array to generate distributed gradient magnetic field, realize multi-robot independent drive;Micro-vision anchor MVAM is used to track the motion trajectory of magnetic micro-robot in real time, and provides robot pose data for MCDO and DFDS.The above-mentioned module realizes the whole process logic closed-loop management and control from path planning to physical drive, interference suppression to state monitoring, and is improved in path planning efficiency, anti-interference control accuracy, multi-machine cooperation capability, environment adaptation and the like.

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.

The application discloses a PGK intelligent control method and system, and belongs to the technical field of precision guidance. The control method comprises the following steps: driving the relative rotation movement of a separate steering ring and a PGK body in the same direction; a controller calculates the absolute rotation speed of the PGK body and the target absolute azimuth angle of the hovering separate steering ring in real time based on a magnetic modulation-rotation speed solving model; based on an eddy current braking torque model, the excitation current of a micro eddy current excitation coil array is adjusted to generate an eddy current braking torque opposite to the rotation direction of the separate steering ring; the eddy current braking torque is controlled to reach dynamic balance with the torque acting on the separate steering ring, so that the separate steering ring is stabilized at the target absolute azimuth angle. The application completely replaces the traditional'motor-reducer' mechanical transmission in an electromagnetic non-contact manner, fundamentally solves the problems of mechanical wear, response delay and poor environmental adaptability, and realizes the structure simplification, performance improvement and high reliability of the PGK control system.

This invention relates to the field of power pipeline construction and underground target positioning technology, and particularly to a trenchless power pipeline laying device and positioning method. It includes: deploying a ground reference coil array and establishing a ground coordinate benchmark; installing a positioning probe assembly on a haulage head and connecting it to the power pipeline; mutual calibration by applying calibration excitation and collecting calibration responses to obtain a calibration parameter set; applying positioning excitation and collecting electromagnetic / inertial / mileage / tension data during the positioning phase; constructing an electromagnetic feature vector and obtaining electromagnetic positioning results; obtaining inertial mileage positioning results based on inertia and mileage; optimizing and outputting fused positioning results via a sliding window and outputting deviation prompts / control commands, recording positioning quality indicators; wherein cable laying and retrieval can draw inspiration from shipboard hydrological and geological survey winches, and connection reliability can draw inspiration from deep-sea general-purpose materials and connectors and other auxiliary equipment. This invention suppresses cumulative errors through ground coil excitation and multi-source fusion correction.

The application discloses an integrated duct device for a low-altitude aircraft and the low-altitude aircraft, and comprises a rotor disc integrated assembly, a stator shell integrated assembly and a propeller array integrated assembly; the rotor disc integrated assembly comprises a central bearing, a propeller array, an annular propeller disc outer ring and a permanent magnet; the propeller array is connected to the outer periphery of the central bearing, the inner ring side of the annular propeller disc outer ring is connected and fixed with all the propeller outer edges, and the permanent magnet is fixed to the outer ring side of the annular propeller disc outer ring; the stator shell integrated assembly comprises a duct shell main body and a coreless stator coil array integrated and fixed inside the duct shell main body; the integrated design of the rotor disc and the stator shell, the coreless coil array and the electromagnetic force simultaneously provide driving and suspension, the no-blade-tip-gap, no-tooth-slot-torque, no-iron-loss, quasi-magnetic suspension driving and zero-power-consumption passive heat dissipation are realized, and the weight, efficiency, noise and reliability are greatly improved.

A long-stroke motion system comprises a stator (1) including a stator base (11), a permanent magnet array unit (12) arranged on the stator base (11), and a transmission unit (13), the transmission unit (13) and the permanent magnet array unit (12) are arranged along a preset track; at least one mover (2) is arranged to slide along the preset track with the stator (1), and includes a mover base (21), a coil array unit (22), and a plurality of slide contact units (23); a main control unit (5) is connected with the transmission unit (13) and controls the mover (2); the slide contact unit (23) includes a fixing member (231) arranged on the mover base (21), a conductive member (232) electrically connected with the coil array unit (22) and abutting against the transmission unit (13), the conductive member (232) is operable to be electrically connected with the transmission unit (13) and communicate with the transmission unit (13) when the conductive member (232) abuts against the transmission unit (13), and a biasing member (233) biases the conductive member (232) away from the fixing member (231). The long-stroke motion system has a simple structure and can operate stably for a long time.

The application relates to a dual-nuclear magnetic resonance coil assembly and a dual-nuclear magnetic resonance imaging device. The dual-nuclear magnetic resonance coil assembly comprises a first coil array comprising N first coils, the first coils having a first resonance frequency, N being an integer not less than 4; a second coil array comprising N second coils, the second coils having a second resonance frequency different from the first resonance frequency; and a multi-frequency power divider having N power output terminals configured to selectively output a first radio frequency signal of the first resonance frequency or a second radio frequency signal of the second resonance frequency, the N power output terminals being respectively connected to the N first coils via a respective first resonant circuit and to the N second coils via a respective second resonant circuit, the first resonant circuit resonating at the second resonance frequency and the second resonant circuit resonating at the first resonance frequency.

This invention relates to a plasma processing cavity, comprising: a reaction cavity, wherein a support structure for supporting a substrate is disposed in the reaction cavity; a dielectric window located above the reaction cavity, through which a coil array transmits an electromagnetic field to the reaction cavity; and a coil array comprising at least three ICP excitation coils and a phase-shifting coil for interconnecting the ICP excitation coils, wherein the phase-shifting coils cause the currents of different ICP excitation coils to be connected in opposite phases, and the inter-turn currents of the phase-shifting coils are either in phase or out of phase; the total length of all ICP excitation coils and the phase-shifting coils is nλ, where n is a natural number and λ is the wavelength corresponding to the frequency of the radio frequency transmitter, and the total length is the wire length of the radio frequency feed point and the ground feed point.

This invention relates to a tiltable liquid deformable mirror driven by a composite magnetic field. It uses an oil-based magnetic liquid and a transparent aqueous solution with matching density as the core optical interface materials. A silver nanofilm is directly prepared at the interface between the magnetic liquid and the aqueous solution using an oil-water interface self-assembly method to improve the reflectivity of the optical interface. High-precision deformation control of the liquid surface is achieved through a micro-coil array. A uniform magnetic field generated by a Helmholtz coil ensures a linear response between the deformation of the magnetic liquid and the driving magnetic induction intensity. Simultaneously, a gradient magnetic field generated by a Maxwell coil suppresses interface shift between the two liquids under tilting conditions. The container is constructed from photosensitive resin and quartz glass, and a material affinity design ensures stable interface maintenance between the two liquids. Compared with existing technologies, this invention solves the problems of interface instability and nonlinear deformation response when traditional magnetic fluid deformable mirrors are tilted, giving magnetic fluid deformable mirrors a wider range of applications.

A single or multiple self-tuning coil element for an MR imaging system is provided. The element is flexible and stretchable and may conform to various body parts and patient sizes. The element may be worn by the patient during the MR imaging session. Each coil may have one or more interdigital capacitors formed of flexible conductive traces. The capacitance of the interdigital capacitor(s) changes under stretching which provides the self-tuning. The traces may be made of liquid metal. The liquid metal may be doped with a contrast agent such that the coil is substantially invisible on an MR image. The coil(s) in a multiple coil element may be arranged in a single or a dual layer.

A radio frequency (RF) coil array for use with a magnetic resonance system having a rotating main magnetic field B0 comprises at least three separate coils, the coils being electrically isolated from one another, concentrically overlaid to form a stack, and configured to sense magnetization precession in three orthogonal planes.

The application discloses a micro device pose visual positioning method for a semiconductor substrate, a flexible magnetic positioning subsystem composed of a coil array and a magnetic sensor array arranged on the same flexible substrate is used to perform global six-degree-of-freedom coarse positioning on a magnetic carrier integrated with a permanent magnet mark; then, an imaging probe is guided to reach a target neighborhood based on the coarse positioning pose, and improved YOLO-Pose neural network is used to complete sub-pixel detection of key points of the micro device, the improved network takes CSPDarknet53 as a backbone, embeds deformable convolution and scale self-adaptive modulation, is matched with a dynamic receptive field adjustment module and a hierarchical key point regression head containing multi-scale Fourier feature coding, and finally, six-degree-of-freedom fine positioning pose of the micro device is solved through an EPnP algorithm. The application effectively overcomes the defects of insufficient positioning accuracy, susceptibility to visual interference and easy loss of micro target features of the traditional positioning.

The application discloses a kind of annular solenoid film transformer based on alloy strip magnetic core and preparation method, including from bottom to top sequentially stacked substrate, lower coil layer, magnetic core layer, upper coil layer and electrode layer;Lower coil layer, magnetic core layer, upper coil layer and electrode layer all use insulating material as base material;Magnetic core layer is provided with annular structure magnetic core prepared using amorphous / nanocrystalline alloy strip;Lower coil layer is provided with the lower solenoid coil array of ring magnetic core at the corresponding position of magnetic core;Upper coil layer is provided with the upper solenoid coil array of ring magnetic core at the corresponding position of magnetic core;Lower solenoid coil array and upper solenoid coil array are communicated by copper column being set in the both ends of coil array;Upper solenoid coil array is connected electrode sheet, and electrode sheet is connected to external electrode being set on electrode layer;After femtosecond laser processing, the amorphous / nanocrystalline alloy strip with high saturation magnetic flux density and low loss as core magnetic material, the transformer obtained obtains high inductance and high Q value.

A high-voltage coil of a dry-type transformer includes n conductors, characterized in that the n conductors are formed by sequentially connecting corresponding sub-coils from the following sub-coil array: the sub-coil array includes n columns of sub-coils arranged radially, each column of sub-coils being formed by m sub-coils arranged axially, each sub-coil being wound with a single conductor in a continuous structure, and the conductor specifications of each sub-coil being the same; the upper leads of the uppermost sub-coils in the n columns of sub-coils are connected in parallel to form the beginning of the high-voltage coil, and the lower leads of the lowermost sub-coils are connected in parallel to form the end of the high-voltage coil; the upper lead of any lowermost sub-coil is connected axially to one of the sub-coils in the same radial direction via connecting wires, and then connected to the lower lead of one of the uppermost sub-coils. A winding method is also disclosed. Using the above structure, the n conductors can be completely transposed, resulting in high production efficiency.

The application belongs to the technical field of wireless communication, and discloses a double-layer metamaterial magnetic induction antenna based on coil posture optimization and a communication device, which comprises a center magnetic induction annular antenna, inner layer coils distributed on an inner layer spherical surface, the inner layer spherical surface being a spherical surface with the center of the center magnetic induction annular antenna as a spherical center, the inner layer coils being uniformly distributed on a selected inner layer actual distribution area on the inner layer spherical surface, outer layer coils distributed on an outer layer spherical surface, the circuit parameters of all the outer layer coils and the inner layer coils being the same, the outer layer spherical surface and the inner layer spherical surface sharing the spherical center and having a radius greater than that of the inner layer spherical surface, the outer layer coils being uniformly distributed on a selected outer layer actual distribution area on the outer layer spherical surface, and the total mutual inductance of the inner layer coils and the total mutual inductance of the outer layer coils being the same. The application can amplify the magnetic field generated by the center magnetic induction annular antenna in multiple stages by only arranging the inner and outer two layer coil arrays, effectively improves the communication performance of the antenna, and has a simple structure and is easy to implement.

The present invention relates to a self-decoupling coil array for magnetic resonance imaging, comprising resonant coils each having a detuning loop, wherein decoupling capacitors are connected in series to the resonant coils; at the positions where the decoupling capacitors are arranged, the two resonant coils are oppositely arranged to form decoupling units, and a plurality of decoupling units are arranged in at least one direction. The decoupling units oppositely arranged at the positions of the decoupling capacitors enable one resonant coil to be decoupled from the other resonant coil, and the decoupling units are present in pairs in the self-decoupling coil array, thereby preventing electrical coupling throughout the entire self‑decoupling coil array and thus achieving self‑decoupling. Compared with the prior art, the self-decoupling coil array for magnetic resonance imaging disclosed in the present application achieves decoupling between detuned resonant circuits by introducing additional electrical coupling, so that the sensitivity remains at an appropriate level and the imaging signal-to-noise ratio gain becomes more uniform.