72 results about "Multi coil" patented technology

The invention discloses a dynamic electromagnetic shielding method for a complex electromagnetic environment and a shielding device thereof, and the method comprises the steps: obtaining real-time voltage data in the complex electromagnetic environment, carrying out the voltage feature analysis, outputting a feature vector of a real-time voltage signal, and analyzing the type of an interference source of a current electric field according to the feature vector, performing interference trend time sequence prediction processing on the feature vector through a pre-trained LSTM model according to the interference source type to obtain a time domain voltage value and a phase deviation value, and performing composite loss coefficient calculation on the time domain voltage value and the phase deviation value to obtain a composite loss coefficient; and performing reverse offset signal synthesis processing on the voltage interference signal according to the calculated composite loss coefficient, performing coil dynamic activation processing on a preset multi-coil array according to the synthesized reverse offset signal, generating a directional offset magnetic field corresponding to the real-time electromagnetic interference, and performing electromagnetic offset shielding on the current electromagnetic interference. According to the invention, transient interference can be responded in time, and the electromagnetic shielding effectiveness can be improved.

The invention provides a low-field NMR automatic shimming method and system for hybrid multi-coil collaborative optimization. The system comprises an optimization strategy control unit, and a coarse shimming unit, a fine shimming unit, an FID processing and evaluation index calculation unit, a current fitting and optimization unit and a shimming execution and signal acquisition unit which are respectively connected with the optimization strategy control unit. The optimization strategy control unit is used for controlling the overall operation of the system and managing the switching and matching of the coarse homogenizing unit and the fine homogenizing unit; the coarse homogenizing unit and the fine homogenizing unit are used for processing FID signals of a nuclear magnetic resonance spectrometer hardware system, assistance can be achieved through the FID processing and evaluation index calculation unit, and the FID processing and evaluation index calculation unit is used for converting collected original FID into numerical indexes capable of being used for quantifying magnetic field uniformity; the current fitting and optimizing unit is used for providing a basis for each shimming coil to analyze and solve the optimal current, and the shimming execution and signal acquisition unit is used for being connected with a lower computer.

The invention relates to a mobile magnetic field generation method and device based on multi-coil dislocation superposition, and solves the problems of intermittent magnetic field disconnection, large magnetic field fluctuation and low energy efficiency caused by phase opening, phase closing and positive and negative control required by traditional coil magnetic field movement. One group or more coils are overlapped in a staggered manner in one group of coils and are partially overlapped in space to form a continuous coverage area, smooth migration of a magnetic field is realized through uninterrupted magnetic field movement, and the stability and energy efficiency of the magnetic field are improved. The method is suitable for linear motors, rotating motors, magnetic suspension driving and other scenes needing directional movement of the magnetic field.

According to the nondestructive testing device and method for the axial force of the underwater steel pipe pile, the device is arranged on the outer wall of the steel pipe pile and in a water environment around a steel structure, and a magnetic induction coil array annularly arranged on the outer wall of the steel pipe pile captures the magnetic flux density change of the steel pipe pile; after modulation of the magnetic field monitoring and modulation module, transmission of the underwater wireless transmission unit and inversion algorithm processing of the rear-end data processing unit, the stress state of the steel pipe pile body is obtained. The method comprises the steps that the signal excitation module applies a background magnetic field to the periphery of the magnetic induction coil array, the magnetic induction coil array induces magnetic field changes outside the steel pipe pile in real time, and the magnetic field monitoring and modulating module recognizes the magnetic field changes and converts the magnetic field changes into voltage signals; the modulated voltage signal is sent to a receiving end underwater through an underwater wireless transmission unit, and a rear-end data processing unit calculates the stress distribution in the pile body according to the change of a multi-point magnetic field and by calling a multi-coil magnetic flux inversion algorithm, and outputs real-time displacement trend, stress change and abnormal alarm information.

The invention provides a rapid test method for a multi-coil CVT, and the method comprises the steps: switching a controller to be connected to a mutual inductor tester, thereby enabling each coil and a corresponding load to form a test loop with the mutual inductor tester; the test loop of the first coil is closed through the switching controller, and then the output voltage is boosted to obtain test parameters; after the test of the first coil is completed, the first test loop is disconnected; a second test loop of the second coil is closed through the switching controller, and then the output voltage is boosted to obtain test parameters; after the test of the second coil is completed, the second test loop is disconnected; and so on. According to the rapid test method of the multi-coil CVT, all lines required by the test can be connected at one time, and the test lines are prevented from being repeatedly disassembled and assembled during the test; in the testing process, load switching does not need to be disconnected and reconnected, direct switching is achieved, voltage reduction is not needed, manual approaching to the tested CVT is not needed, remote operation can be achieved, and safety and high efficiency are achieved.

The utility model relates to the technical field of transceivers, in particular to a wireless network transceiver based on multi-coil coupling, which comprises a transceiver body, the transceiver body is mounted on a guide rail through a fixing structure, a first fixing plate is fixedly connected onto the transceiver body, and the end of the first fixing plate is slidably connected with the top end of the guide rail. A second fixing plate is slidably connected into the first fixing plate, the end of the second fixing plate is slidably connected with the bottom end of the guide rail, two tension springs are fixedly connected between the first fixing plate and the second fixing plate, a limiting rod is slidably connected into the second fixing plate, a limiting groove is formed in the first fixing plate, and the limiting rod is clamped with the limiting groove. A protruding block is fixedly connected to the second fixing plate, a plurality of clamping grooves are formed in the guide rail, the protruding block is clamped in the clamping grooves, and a bunching structure is installed on the transceiver body. Therefore, the transceiver body can be installed more easily and flexibly, and the stability is better.

The application provides a kind of magnetic logic gate circuit based on multi-coil drive and gate circuit implementation method, belongs to the field of gate circuit structure.The gate circuit includes magnetic field excitation element, magnetic induction element and post-stage rectification module, wherein the magnetic field excitation element includes AC magnetic field excitation element and two DC magnetic field excitation elements, the AC magnetic field excitation element outputs AC magnetic field, which is used for magnetic induction element to generate magnetic-electric coupling effect, two DC magnetic field excitation elements provide DC magnetic field for magnetic induction element, the input end of two DC magnetic field excitation elements serves as two input ends of the magnetic logic gate circuit, the output end of the magnetic induction element is connected to the input end of the post-stage rectification module, the output end of the post-stage rectification module outputs DC voltage, which serves as the output end of the magnetic logic gate circuit.The application can adjust high and low level input according to the change characteristics of magnetic-electric coefficient, and the driving is simple with low failure rate.

The application provides a multi-coil incremental permeability dynamic detection probe and a yield strength detection method. The probe mode of the multi-coil is used to detect different positions of materials in different magnetization states at the same time. In the movement process, the mechanical properties of the materials can be quickly and efficiently predicted. Compared with the traditional static detection mode, the dynamic detection probe can be used for continuous detection, so as to improve the detection efficiency and realize the purpose of pipeline detection operation.

The invention belongs to the technical field of transient electromagnetic detection, and particularly relates to a transmitting coil of an underground high-power in-hole transient electromagnetic instrument, which adopts a laminated rectangular spiral winding mode and a multi-coil parallel transmitting technology. The stacked rectangular spiral winding can increase the effective area of a single-turn coil and improve the emission magnetic moment under the limitation of the length of a fixed enameled wire, the size of an exploring tube and coal safety explosion-proof voltage and current; multi-coil parallel emission reduces coil resistance and total inductance through in-phase parallel cascading, emission current is improved so as to further increase emission magnetic moment, turn-off time of a primary field is shortened, coal safety explosion-proof requirements can be met, detection capability of a transient electromagnetic instrument is enhanced, data reliability and accuracy are improved, and the method is suitable for popularization and application. The method is suitable for complex underground environment detection.

The invention belongs to the technical field of inductance equipment manufacturing, and particularly relates to a three-phase inductance coil winding device and method. Comprising a base, and a driving roller and two driven rollers are mounted at the top of the base; a magnetic ring is connected between the driving roller and the two driven rollers in an abutting mode. A first electric telescopic rod is further installed at the top of the base and located below the magnetic ring, and a wire hook is fixedly arranged at the end of the first electric telescopic rod. According to the invention, the problems of complex process and low efficiency caused by repeated winding and repeated cutting during preparation of the three-phase inductance coil can be avoided through one-time forming, and meanwhile, the magnetic ring is not damaged; the device can quickly adapt to the size change of the magnetic ring and the operation of the rollers, the problem that the magnetic ring cannot rotate due to inaccurate adjustment caused by respective adjustment of the rollers is solved, the device can be quickly reset, and the fine adjustment efficiency is greatly improved; the multi-coil winding and cutting device is suitable for large-current multi-coil winding and cutting at the same time.

A coil electronic component includes: a body including a magnetic material, four or more coils embedded in the body, and a gap portion comprising a glass material disposed in at least one of regions between adjacent coiling in the four or more coils.

The utility model discloses a winding tool suitable for superconducting multi-coil and multi-specification model modules, which comprises a winding main shaft, a plurality of superconducting coils are arranged at intervals in the axis direction of the winding main shaft, and each superconducting coil is arranged on the winding main shaft through a respective mounting bracket in a non-relative rotation manner. Each installation support comprises a pair of clamping plates which abut against the end portions of the two axial sides of the superconducting coil and a pair of radial clamping mechanisms which abut against the radial inner end portion and the radial outer end portion of the superconducting coil in a matched mode, and the center of each clamping plate is provided with a shaft hole through which the winding main shaft passes. According to the superconducting coil winding device, the multiple superconducting coils are installed on the winding main shaft through the installation support, the multiple superconducting coils can be wound at a time in the winding process, the preparation efficiency of the superconducting coils is improved, the requirement for production of a large number of or large batches of superconducting coils can be met, and the production cost is reduced.

The invention discloses an assembling method and device for a welding-free coil. The assembling method comprises the steps that the coil is positioned so that the coil can be within the detection range of a visual assembly; identifying the state of the coil through a visual component so as to judge whether the coil is qualified or not; if the coil is qualified, the stitch angle of the coil is identified through the visual assembly; and an angle compensation value is provided for a grabbing assembly according to the pin angle so that the grabbing assembly can assemble the coil and the shell at the correct angle. The visual assembly identifies the peak coordinates of the pins, calculates the height difference and the distance and compares the height difference and the distance with the preset threshold value, unqualified coils can be accurately screened out and scrapped, the problem that in the prior art, when multiple coils are pressed, a single coil fails and cannot be identified is solved, and the assembly quality is guaranteed from the source.

A main inductor circuit is connected to an AC power supply and a passive inductor circuit are assembled as a separable split inductor assembly to form at least one pair of a main heating inductor and a passive heating inductor wherein the main and passive inductor circuits are electromagnetically coupled without physical connection; a bearing component can be brought into the presence of the magnetic flux field created by the main and passive heating inductors to induction heat one or more bearing features in the bearing component with subsequent cooling of the austenitized bearing features in the bearing component.

The invention discloses a multi-coil magnetic field real-time optimization method based on a particle swarm algorithm and a driving system. The magnetic field of a multi-coil magnetic driving system is optimized. The position parameters of the multiple coils are adjusted to generate a magnetic field in the space, and the position parameters of the coils are collected in the process of driving the micro-robot through simulation and experiments. A pre-optimized parameter interval is obtained through particle swarm optimization pre-optimization processing, in order to enable the system to have good real-time performance, small sample sampling is carried out in the pre-optimized parameter interval in the optimization process, the result in the pre-optimized parameter interval is closer to the optimal value through optimization processing, the sampling interval range is very small, and therefore the real-time performance of the system is improved. Small sample sampling can meet the accuracy of the magnetic field, and in addition, real-time optimization of a driving system can also be met. The pre-optimization process of the method can be realized in a simulation environment, the cost can be reduced, and the dependence of the optimization process on real operation is reduced.

This invention relates to a multi-coil switching power supply with a wide input range, comprising a switching transformer T2 with three series-connected primary windings, whose secondary windings output negative feedback voltage, 12V, 24V, and 5V respectively; pin 4 of the main control chip U3 is grounded via resistor R28, and also via resistor R28' and phototransistor U6b; LED U6a is connected to the secondary winding Le, which controls transistor Q8, which in turn controls LED U6a, achieving PFM control. Therefore, by using a switching transformer with three series-connected primary windings, the input voltage is divided into three equal parts, allowing it to withstand a wide input range voltage. Furthermore, the PFM control method developed for the PWM control chip achieves good regulation of the wide input range voltage, making it suitable for photovoltaic power plants, wind power, and energy storage.

The utility model discloses a housing with electromagnetic shielding function and heating equipment, the housing comprises a shielding base, a heightening ring and a shielding top shell, the shielding base and the heightening ring are cylindrical with open upper and lower ends, the shielding top shell comprises a cylindrical side wall and an annular top surface, the heightening ring is installed on the shielding base, and the shielding base and the heightening ring are arranged on the shielding top shell. The shielding top shell is installed on the heightening ring, and the shielding base, the heightening ring and the shielding top shell are all made of metal materials. According to the utility model, the upper side coil and the lower side coil are completely isolated through the housing, so that the shielding effectiveness is greatly improved, electromagnetic coupling during simultaneous working of multiple coils is reduced, and the stability of equipment is improved; meanwhile, the design of the heightening ring can flexibly meet the requirement for up-down movement of the coil, so that the temperature gradient required by crystal growth is met, and equipment is prevented from being damaged; and the spigot connection design facilitates quick disassembly and assembly, and the operation is very convenient.

A coil electronic component, including: a body including a magnetic material; three or more coils embedded in the body; a plurality of external electrodes disposed outside the body and connected to the coils; and gap portions disposed between the coils and having a different magnetic permeability than the body, wherein one of the gap portions has a different shape than the rest of the gap portions.

The utility model discloses a coil binding machine which comprises a machine frame, the machine frame is provided with a feeding module, a guiding module, a cutting module, a material moving module, a pressing module and a turn-over module, the feeding module can convey coil strips to the guiding module, the cutting module can cut the coil strips into coil sections, the coil sections can slide to the pressing module along the guiding module, and the turn-over module is arranged on the machine frame. The material moving module can sequentially transfer the coil segments and books hung on at least two coil segments to the pressing module and the turn-over module, the pressing module can press the coil segments to enable the coil segments to be closed up, and the turn-over module can turn over the front cover or the rear cover. According to the automatic binding machine, multiple coil segments are bound at the same time, automatic production of coil feeding, coil cutting, book material moving, coil pressing and book turning is integrated, consumables are reduced, cost is reduced, and efficiency is improved.

The application relates to the technical field of energy storage systems, and provides a wireless energy transmission type energy storage system based on multi-coil magnetic coupling resonance, which comprises multiple energy storage transmission modules, a power receiving end magnetically coupled with the energy storage transmission modules and a control system; the energy storage transmission module comprises an energy storage battery pack and a power transmission end electrically connected with the energy storage battery pack; the power transmission end comprises a direct-current voltage stabilizing capacitor, an inverter, a transmission end resonance compensation capacitor and a transmission coil; the power receiving end comprises a receiving end resonance compensation capacitor, a receiving coil and a converter with an output end connected to an alternating current power grid; and the control signal output end of the control system is connected to the control ends of the inverter in the power transmission end and the converter in the power receiving end respectively, so that the control system can control energy transmission power. The wireless energy transmission mechanism based on multi-coil magnetic coupling resonance avoids the dependence of external wiring and connectors between battery packs, effectively improves the operation safety, environmental adaptability and maintenance convenience of the energy storage system.

The invention discloses a mutual inductance type tactile sensing unit, and relates to the technical field of flexible bionic tactile sensing devices. The mutual inductance type tactile sensing unit comprises at least two magnetic induction coils which are arranged in a stacked mode, and a first insulating layer used for electrically isolating the magnetic induction coils is arranged between every two adjacent magnetic induction coils; at least one of the first insulating layers is an elastic insulating layer formed by one or more layers of elastomers and is used for supporting the magnetic induction coils to approach each other under the action of external force and supporting the distance between the magnetic induction coils to recover after the external force disappears; pressure sensing parameters are obtained by detecting the inductance change of the magnetic induction coil. By adopting the mutual inductance type multi-coil design, compared with the eddy current induction principle in the prior art, the device has the advantages of high sensitivity and low requirement on the surrounding environment, and the detection result is efficient and reliable.

The invention discloses a composite shimming and four-group reverse proportional gradient external compensation coil system and method for simultaneous measurement of heart and brain. The method comprises the following steps: a shimming coil subsystem forms an axial cuboid uniform region in a manner that a multi-coil composite configuration is matched with non-uniform current excitation; each gradient field coil of the gradient coil subsystem is divided into four segments along the axial direction, inner and outer windings are reversely electrified, and a gradient linear region is expanded according to a non-linear proportion of current; the measurement control unit obtains magnetic field information in real time and drives the two subsystems to output a compensation magnetic field. According to the method, standardized types are classified according to site sizes, magnetic field fluctuation and gradient are taken as threshold values, shimming and gradient coil parameters are optimized, and coil constants are determined through simulation verification. According to the invention, large-scale cuboid uniform region and high-linearity gradient compensation required by heart and brain synchronous measurement are realized, low-frequency magnetic field fluctuation and gradient interference are inhibited, and the device is simple in structure and adapts to various building environments.

The application discloses a kind of full-automatic multi-coil high-precision winding equipment and winding method thereof, belong to coil winding technical field, including setting on the base plate and paying out mechanism, line arrangement mechanism, main shaft mechanism, cutting mechanism, material taking mechanism, heat supply mechanism and machine case, wire rod is output to line arrangement mechanism by paying out mechanism, line arrangement mechanism includes horizontal wire feeding mechanism and longitudinal moving mechanism, longitudinal moving mechanism controls horizontal wire feeding mechanism longitudinal movement, horizontal wire feeding mechanism outputs wire rod to main shaft mechanism, main shaft mechanism includes the upper main shaft mechanism and lower main shaft mechanism for realizing winding work, cutting mechanism is used for cutting wire rod between line arrangement mechanism and upper main shaft mechanism after winding is completed, heat supply mechanism carries out outer surface heat supply shaping work to wire rod, material taking mechanism moves to next station after winding is completed to coil.The application realizes the precise winding operation of multiple coils by the cooperation of line arrangement mechanism, upper main shaft mechanism and lower main shaft mechanism.

The invention relates to a medical guidewire for improving vascular navigation. The guidewire is provided with a tightly-woven coil or a spring coil or multiple coils along the length of the guidewire. The coil defines a central passage and has a distal end that bends when no external force is applied, the shaft defines a central passage, and a central spring. The stop mechanism includes a coupling ring located between the spring and the coil, or the coil has a plurality of diameters. A straight core passes through the central passage of the shaft, the spring, and the main central passage of the coil, and when pulled allows the distal end to assume a curved configuration. The shaft compresses the spring and forces the distal end of the coil to rotate when moved distally when the distal end of the coil is bent. The longitudinal sleeve covers a portion of the coil and a joint between the shaft and the coil.

An induction heating system for an induction cooking appliance is provided. The induction heating system includes a plurality of coils operable to inductively heat one or more loads. The induction heating system further includes one or more inverters operable to provide an alternating current. The induction heating system further includes an auxiliary load detection circuit. The induction heating system further includes a plurality of switching devices operable to switch each coil of the plurality of coils from the one or more inverters to the auxiliary load detection circuit. The induction heating system further includes a controller configured to control one or more first switching devices of the plurality of switching devices to operate one or more first coils of the plurality of coils in a test mode, wherein in the test mode, the controller controls the one or more first switching devices to switch the one or more first coils from the one or more inverters to the auxiliary load detection circuit.

The electromagnetic micro-vibration energy harvester comprises a vibration pick-up base, coils, a resonance spring, a vibrator unit and permanent magnets, the resonance spring is fixedly connected between the center of the vibration pick-up base and the center of the vibrator unit, the coils are arranged on the periphery of the vibration pick-up base in an array mode, the permanent magnets are movably connected in the coils, and the permanent magnets are arranged on the periphery of the vibration pick-up base. And the upper end of the permanent magnet is fixedly connected with the vibrator unit. The coils are installed in an array arrangement mode, so that the structure of the energy harvester is greatly reduced, vibration mechanical energy is converted into electric energy in the small energy harvester, and energy supply can be provided for sensor nodes of a structure state monitoring system. The device is suitable for the working condition of small displacement, and the energy conversion efficiency in unit area is improved by adopting array type multi-coil arrangement.

Embodiments of a multifilar inductor with at least three windings that are switchable, having a power assigned winding denoted as P1, a suppression assigned winding denoted as B, a containment assigned winding denoted as T, a switching apparatus to switch assignments between the P1, B and T windings; and a capacitor bank, wherein B suppresses the back EMF generated by a pulse power, T contains field emitted EMF generated by the pulse power. The input pulse power input is converted to a constant current output into the capacitor bank such that its time duration is extended by the combination of the inductor windings plus the capacitor bank to thereby minimize the peak inductance below the inductor's saturation point.

The invention belongs to the technical field of electromagnetic nondestructive testing, and particularly relates to a decarburized layer thickness detection method and device based on pulsed eddy current and a medium. A probe comprising multiple coils and a self-calibration unit is placed on the surface of a workpiece to apply excitation, and positioning is completed; carrying out amplification and phase calculation on the received signal, analyzing and optimizing a coil excitation pickup sequence through sample piece pre-scanning, collecting a response signal based on the optimized sequence, and extracting time-frequency domain composite features; performing multi-frequency scanning on the workpiece by using the optimized sequence, extracting features of a scanning position, inputting the features into a pre-trained deep learning model, and outputting thickness information; and judging whether a standard is met according to the thickness information. According to the method, by optimizing the coil excitation sequence and combining with the deep learning model, the detection precision is improved, and nondestructive evaluation of the thickness of the decarburized layer can be effectively achieved.

This invention discloses a wireless charging testing device, including a horizontally arranged worktable. A multi-coil feeding mechanism, which can be driven to reciprocate on the worktable, is arranged above the worktable along the movement direction of the multi-coil feeding mechanism, with a detection unloading mechanism and a feeding mechanism spaced apart. A feeding platform is arranged on one side of the worktable, corresponding to the feeding mechanism. This invention can replace manual inspection or single machine inspection, realizing batch inspection of coils and improving inspection efficiency and accuracy. This invention is applicable to the technical field of coil inspection in the production of wireless charging devices.