950 results about "Coil structure" patented technology

The invention discloses a single-coil winding type four-eight-pole composite iron system for beam homogenization. The composite iron system comprises a composite magnet current control device, a composite magnet main power supply and four-pole / eight-pole composite iron, the quadrupole / octupole composite iron has eight pole heads, and only one type of excitation coil is wound on each pole head; the current value of the A-type excitation coil is an absolute value of a quadrupole magnetic field excitation current value plus an octupole magnetic field excitation current value; the current value of the B-type excitation coil is an absolute value obtained by subtracting an octupole magnetic field excitation current value from a quadrupole magnetic field excitation current value; the quadrupole / octupole composite iron is used for simultaneously generating a dominant quadrupole magnetic field and an octupole magnetic field, so that the effects of quadrupole iron and octupole iron can be simultaneously realized by only installing one transmission element; the excitation coil structure of the quadrupole / octupole composite iron composite magnet is improved, and only one excitation coil is wound on each pole head, so that the size of the coil structure can be reduced, and the construction cost is reduced.

The invention discloses a pull-type transient electromagnetic detection technology based on eccentric self-compensation and a method thereof. The method comprises the following steps: 1) preliminarily laying a coil structure; 2), according to theoretical calculation and analysis of related parameters in an existing coil structure, selecting a relatively proper vertical distance H between the circular receiving coil and the circular transmitting coil; 3) according to the vertical distance L determined in the step 2), further theoretically calculating a horizontal distance L between the center of the circular receiving coil corresponding to the height and the center of the circular transmitting coil; (4) adjusting the position of the circular receiving coil in the coil structure according to the results in the step (2) and the step (3); and (5) transient electromagnetic detection is carried out through the coil structure adjusted in the step (4), in a certain size error range, interference of a primary field on signals is avoided, the signals sensed by the receiving coil can serve as pure secondary field signals to carry out subsequent data processing, so that the transient electromagnetic detection device has higher tolerance to physical size errors, and the accuracy of transient electromagnetic detection is improved. And the acquired signal is more fidelity.

The invention discloses a pilot head assembly and an electromagnetic valve, and relates to the technical field of electromagnetic valves.The pilot head assembly comprises a shell sleeve, an inner cavity of the upper end of the shell sleeve is fixedly connected with a first fixed iron core, and the position, corresponding to the first fixed iron core, of the outer wall of the shell sleeve is sleeved with a first electromagnetic coil; the lower end of an inner cavity of the shell sleeve is fixedly connected with a second fixed iron core, the position, corresponding to the second fixed iron core, of the outer wall of the shell sleeve is sleeved with a second electromagnetic coil, and a movable iron core piston seat is movably connected to the bottom of the shell sleeve in an inserted mode. Through cooperative control of the double-electromagnetic-coil structure and the rotating ratchet mechanism, stepless switching of the electromagnetic valve between the normally-open state and the normally-closed state is achieved, the stroke of the sealing plug can be accurately positioned through the limiting clamping groove of the ratchet sleeve under the action of different electromagnetic fields, mode switching can be completed without an external mechanical device, and the working efficiency is improved. The problem that switching of a traditional electromagnetic valve needs a complex external device is solved.

The invention discloses an underground space time-shifting transient electromagnetic unmanned monitoring device and method. The underground space time-shifting transient electromagnetic unmanned monitoring device comprises a mobile platform, a multifunctional transient electromagnetic detection device and a ground remote control terminal, the multifunctional transient electromagnetic detection device can actively adjust the distance between a transmitting coil and a receiving coil so as to realize a mutual inductance eliminating 8-shaped coil structure, and through cooperation with a calibration algorithm of a control center, the automation level and reliability of detection are remarkably improved, and it is ensured that the 8-shaped coil is in a mutual inductance eliminating state. In addition, the transient electromagnetic monitoring device can perform structure switching between deep layer detection and shallow layer detection, so that a high-efficiency detection mode that one circle has two purposes is realized, and the efficiency and the flexibility of detection operation are remarkably improved. In the actual detection process, the advantages that the 8-shaped coil is small in shallow blind area and large in overlapped loop detection depth are fully played, advantage complementation of two coil modes is achieved, and comprehensiveness and accuracy of a detection result are remarkably improved through a data fusion mode.

An ice scratcher assembly, comprises a base having a first portion and a second portion, a coiled structure coupled to the first portion, the coiled structure being interconnected to a scratcher end via an arm, and a hand structure interconnected to the second portion by at least one joint having a first axis, wherein the at least one joint is configured to receive at least one rotating component that when coupled to the at least one joint provides a rotational axis that is colinear with the first axis of the at least one joint.

The invention provides a preparation method of an HDMI (High Definition Multimedia Interface) high-performance common-mode suppressor made of a nanocrystalline material, relates to the technical field of electronic component preparation, and aims to meet the harsh requirement of HDMI high-frequency high-speed signals on common-mode noise suppression, the method comprises the following steps: constructing a multi-layer heterogeneous magnetic film with a gradient interface on a microstructured substrate by utilizing multi-target magnetron sputtering; a selective energy field assisted annealing technology is adopted to realize precise nanocrystallization and magnetic anisotropy regulation and control of the magnetic film; and a high-precision three-dimensional coil structure is integrated by combining a micromachining process. The prepared common-mode suppressor is small in size and high in integration level, shows excellent common-mode suppression efficiency, wide working bandwidth and excellent signal integrity in a high-frequency band, has high reliability, and is suitable for a new generation of HDMI (High-Definition Multimedia Interface).

The invention discloses a wireless power transmission coil optimization method and a related system, which can realize automation of coil structure parameters and multi-target global optimization by acquiring a coil geometric parameter space, constructing a comprehensive optimization function and performing iterative search in the coil geometric parameter space. The problems that in traditional design, the number of simulation iterations is large, design efficiency is low, local optimum is prone to occurring, and multiple performance indexes are difficult to balance are effectively solved, coil design efficiency and precision are remarkably improved, and dependence on artificial experience is reduced. Therefore, the number of manual intervention and simulation is remarkably reduced, the coil design efficiency is improved, and the prototype development period of the WPT system is shortened. Besides, iterative search is carried out in the parameter space, so that the whole design space can be effectively explored, a locally optimal solution trap can be jumped out, and a globally optimal or approximately globally optimal coil structure parameter combination can be obtained more possibly.

The invention provides an MCR-WPT system planar coil structure parameter optimization method based on an improved four-vector optimization algorithm. Analyzing an S-S topology compensation structure network, and deducing the energy transmission efficiency of the MCR-WPT system; analyzing the influence of the physical structure of the coil on the characteristic parameters of the coil, and calculating the self-inductance value of the coil; calculating a mutual inductance coefficient value between the coupling coils; calculating alternating current resistance; calculating a coupling coefficient between coupling coils, and analyzing frequency splitting to establish constraint conditions; determining an optimization variable, and taking the energy transmission efficiency as a target function value and an optimization target; setting a constraint condition according to the critical coupling coefficient, and adjusting a parameter range according to the constraint condition; and optimizing the energy transmission efficiency, namely a target function, by adopting an improved four-vector optimization algorithm according to coil setting parameters.

The invention discloses a frequency mixing sound demodulator based on a curled structure and a use method thereof in the acoustics field, the demodulator is used for separating frequency mixing sound mixed by a plurality of sound waves with preset frequencies according to respective frequencies, and the demodulator comprises an air waveguide for transmitting the sound waves, and blocking structures arranged on two sides of the air waveguide for blocking the sound waves from penetrating, and a plurality of curled structures that capture corresponding preset frequency sound waves; curled structures are arranged in the barrier structure on at least one side of the air waveguide at intervals, one end of each curled structure is open, and the other side is closed; a plurality of cross beams for blocking penetration of sound waves are arranged in each curled structure, and an internal channel of each curled structure is divided into different lengths to serve as different acoustic resonant cavities so as to capture the sound waves with different frequencies; the closed end of each curled structure is a detection end of each preset frequency sound wave. The invention solves the problem that the existing method is difficult to instantly separate the frequency mixing sound signal and carry out information transmission.

The invention provides a hoisting type charging device and an automatic folding and unfolding method. The charging device comprises a charging gun; the charging pile is suspended on the ceiling or the cross beam, and the charging pile is provided with a charging cable; the wire coil comprises a first half wire coil and a second half wire coil which are oppositely buckled into a whole, and a wire twisting prevention structure is arranged at the butt joint position of the first half wire coil and the second half wire coil; one end of the charging cable is sequentially wound on the first half wire coil, penetrates through the anti-twisting wire structure, then is wound on the second half wire coil and then is connected with the charging gun; the two electric winches are suspended on a ceiling or a cross beam and are used for driving the wire coil to lift through a suspension rope so as to enable the charging cable to be wound and unwound in an anti-torsion manner; the radio sensor is arranged on any electric winch and used for sensing arrival or departure of the corresponding vehicle, and the radio sensor is in communication connection with the electric winches and used for controlling descending or ascending of the two electric winches; automatic lifting can be achieved based on parking of a vehicle, and a charging cable is effectively wound and unwound in an anti-torsion mode through the cable coil structure.

The utility model discloses a switchable waterway structure for testing a circulating pump, which is characterized by comprising a base frame, and a first testing waterway, a second testing waterway, a third testing waterway and an output pipe which are arranged on the base frame, the first test water path, the second test water path and the third test water path are arranged in an S-shaped circuitous coil pipe structure; a first bypass pipe and a first control valve are arranged between the tail end of the first test water path and the output pipe; a second bypass pipe and a second control valve are arranged between the second test water path and the output pipe; and a third control valve is arranged between the tail end of the third test water path and the output pipe. According to the utility model, the installation station of the circulating pump does not need to be changed, and only the conduction state of the control valve is switched on the waterway test frame, so that the drawing force test under various waterway length simulation working conditions can be quickly carried out, the arrangement space of a test platform is greatly reduced, and the test efficiency is effectively improved.

The invention discloses a coil structure-based length self-sensing method for high polymer twisted artificial muscle, which comprises the following steps of: firstly, enabling the artificial muscle to be equivalent to N equidistant circular current loops, establishing an inductance calculation formula by combining a Biot-Savart law and a magnetic field superposition principle, and breaking through the limitation of a traditional solenoid model on a helical angle; then through MATLAB numerical simulation and iterative computation, fitting to obtain a power function describing the relation between inductance and length; and finally, proposing a parameter dynamic correction mode based on single-time initial inductance measurement according to complex factors such as actual magnetic flux leakage and skin effect, and realizing rapid adaptive calibration by adjusting a parameter b. In a word, the method creatively combines theoretical modeling with experimental correction, the sensing precision in a dynamic stretching scene is remarkably improved while the inductance-length macroscopic trend prediction capability is ensured, dependence on a large amount of experimental data is not needed, and the method has good engineering applicability and is worthy of popularization.

The invention discloses a magnetic field chip design method based on a genetic algorithm, and the method comprises the steps: setting genetic algorithm parameters, and setting magnetic field chip target parameters according to actual application demands; generating an initial population, wherein the initial population is a plurality of groups of individuals containing coil parameters; checking constraint conditions of the individuals, wherein the constraint conditions comprise physical constraints and design constraints; the power consumption generated by the coil structures corresponding to the individuals meeting the constraint conditions serves as a fitness function, and the fitness of all the individuals in the current population is evaluated; and judging whether a termination condition is met or not, outputting an individual with the optimal fitness as an optimal combination of coil parameters under the target parameters of the magnetic field chip when the termination condition is met, otherwise, generating a next-generation population, and repeatedly carrying out constraint condition check and fitness evaluation until the termination condition is met. According to the method, the magnetic field chip with the minimum power consumption meeting the magnetic field target can be designed, the design time of the magnetic field coil is greatly shortened, and the design rapidity and flexibility are improved.

The present application relates to the technical field of power devices, and particularly discloses a resonant leakage inductance transformer for a plate-type ozone generator, comprising: insulating bobbins, two insulating bobbins being longitudinally provided, a primary coil structure and a secondary coil structure being respectively provided on the insulating bobbins in the circumferential direction, and the two insulating bobbins being longitudinally aligned and fixed; magnetic cores, each magnetic core comprising a plurality of protruding portions, the protruding portions extending in the longitudinal direction, the plurality of protruding portions being arranged in a single transverse row, and the protruding portions located in the middle in the arrangement direction respectively longitudinally passing through the middle of the two insulating bobbins; and an insulating fixing frame, the magnetic cores being arranged in the insulating fixing frame. The primary coil structure and the secondary coil structure are each of a multi-layer wound coil structure, and ceramic tubes are inserted between adjacent layers of coils of the coil structure.

The invention provides an anti-offset magnetic coupling mechanism for a wireless charging system of an unmanned aerial vehicle, the magnetic coupling mechanism comprises a transmitting end arranged on a landing platform and a receiving end mounted on the unmanned aerial vehicle, and a transmitting coil is a double-layer circular coil wound at gradient intervals; an axial magnetic field which is uniformly distributed is formed through a non-uniform distribution structure of coil turn spacing; the receiving end is composed of four sets of same magnetic core-coil structures, each set is composed of a lightweight cylindrical novel soft magnetic composite material magnetic core and an externally-wound solenoid coil of a vertical landing gear of the unmanned aerial vehicle, the magnetic cores are located in the vertical landing gear of the unmanned aerial vehicle, and the coils of the four magnetic core-coil structures are closely wound in the axial direction of the outer surface of the landing gear and connected in series. And coil and magnetic core parameters are designed by using an evolutionary algorithm. The problems that in a traditional scheme, the anti-offset capacity is weak, the magnetic core weight is large, and the receiving end is not matched with the special-shaped structure of the unmanned aerial vehicle are solved, and the method is suitable for unmanned aerial vehicle wireless charging scenes.

The invention belongs to the technical field of oil-gas exploration and development, and relates to a transient electromagnetic wave through casing resistivity measurement method, which comprises the following steps of: establishing a cased well stratum model by considering a borehole, a casing and a stratum and combining transient electromagnetic wave logging characteristics; in a cased well formation model, the resistivity is measured by adopting an apparent resistivity extraction method based on a late signal, and the resistivity measurement method of the apparent resistivity extraction method based on the late signal comprises the following steps: simulating different formation resistivity in the cased well formation model; a single-transmitting single-receiving coil structure is adopted to measure zz component induced electromotive force of late transient electromagnetic wave logging; the apparent resistivity is extracted according to the late transient electromagnetic wave logging zz component induced electromotive force signal, and the extracted apparent resistivity is the transient electromagnetic wave through casing resistivity. According to the method, the transient electromagnetic wave through casing logging response precision can be improved, and formation resistivity extraction under the influence of a high-conductivity casing is achieved.

The invention relates to a radio frequency coil design method for transmitting array space coding imaging, and belongs to the technical field of magnetic resonance imaging. Aiming at the problems of low single-dimensional coding efficiency, strong coupling interference among coils and nonlinear phase gradient in the traditional TRASE technology, axial and radial coding coils are designed based on a target field method and a magnetic dipole method, two-dimensional radio frequency phase coding is realized through reverse current solenoid decoupling combination, and excitation and signal receiving are realized in combination with a saddle-shaped coil. According to the technical scheme, by optimizing the coil structure and the decoupling design, multi-dimensional efficient coding, high-precision phase gradient, strong anti-interference and light system weight are achieved, and the method is suitable for portable and dynamic monitoring scenes of low-field magnetic resonance.

A substrate integrated with passive devices and a manufacturing method thereof are provided. The manufacturing method of the substrate integrated with passive devices includes: providing a transparent dielectric layer with first connection vias therein, wherein the transparent dielectric layer includes a first surface and a second surface, which are opposite to each other along a thickness direction of the transparent dielectric layer; integrating the passive devices onto the transparent dielectric layer, wherein the passive devices include at least an inductor, the integrating the passive devices onto the transparent dielectric layer includes: forming first sub-structures on the first surface of the transparent dielectric layer, forming second sub-structures on the second surface, and forming first connection electrodes in the first connection vias, respectively; wherein the first sub-structures, the first connection electrodes and the second sub-structures are connected together to form a coil structure of the inductor.

A coil structure for near-field wireless power transfer, integrating the traditional inductor and external capacitor structure into one single coil and forming a series resonance. The series resonance is achieved by a terminal connection and layering method. The electric field is canceled via a distributed turn-to-turn interleaving structure. With the integrated capacitor, the costs and space of a resonant capacitor can be saved. With the canceled electric field, the interference with neighboring components, such as touch-screen, can be reduced. Other benefits can include low-profile and fabrication convenience based on RGB technology. This coil can be useful for both consumer electronics and electric vehicle wireless charging.

The utility model provides a magnetic element and a topological structure used for an interleaving flyback converter, and relates to the technical field of power electronics, and the magnetic element comprises a magnetic core structure and a coil structure. The magnetic core structure comprises an upper magnetic core base, a lower magnetic core base, N magnetic core middle columns and at least one side column, wherein the upper magnetic core base and the lower magnetic core base are oppositely arranged, the N magnetic core middle columns and the at least one side column are arranged between the upper magnetic core base and the lower magnetic core base, and N is a natural number larger than 1. The coil structure comprises N coils wound on the magnetic core middle columns respectively, the winding directions of the coils on the adjacent magnetic core middle columns are opposite, and an air gap is formed in at least one of the three positions including the position between the upper bottom face of each magnetic core middle column and the upper magnetic core base, the position between the lower bottom face of each magnetic core middle column and the lower magnetic core base and the side face of each magnetic core middle column. According to the magnetic element, the magnetic core columns are integrated on the same magnetic core base, and the winding directions of the coils of the adjacent magnetic core middle columns are opposite, so that the purposes of reducing the weight of the magnetic core and reducing the loss of the magnetic core can be achieved.

The invention relates to a Litz wire manufacturing method and a coil structure, a Litz wire is divided into an inner layer structure and an outer layer structure, the inside of the Litz wire is formed by twisting a plurality of mutually insulated wires, the outside of the Litz wire is covered by an insulating layer, the number of strands of the internally twisted wires is more than 2700, the diameter of a copper wire used for wire twisting is more than 0.2 mm, and the Litz wire is directly blanked and trimmed without winding and forming; according to the Litz wire, a pole-phase group is directly embedded in a stator iron core groove, and only two coil lead outgoing heads are arranged in the pole-phase group, so that welding among coils is reduced; and after the soft litz wire is embedded, the end part can be directly shaped, so that the soft litz wire can be orderly arranged in sequence.

A current sensor assembly can include: a coil structure having a first coil and a second coil connected in series, the coil structure configured to generate a differential magnetic field responsive to an electrical current passing through the first and second coils; a first magnetic field sensing element disposed proximate to the first coil and operable to generate a first signal responsive to the differential magnetic field passing through the first magnetic field sensing element in a first direction; a second magnetic field sensing element disposed proximate to the second coil and operable to generate a second signal responsive to the differential magnetic field passing through the second magnetic field sensing element in a second direction; and a circuit operable to subtract the first and second signals to generate a differential signal proportional to the electrical current.

The utility model relates to the technical field of electronic expansion valves, in particular to a coil structure and an electronic expansion valve. The coil structure comprises a stator assembly, a wire assembly and a wire fixing frame, wherein the stator assembly comprises a framework and a plurality of contact pins connected to the framework; the wire assembly comprises a plurality of leads and an outer coating layer, the outer coating layer wraps the peripheries of the leads, and the leads are electrically connected with the contact pins. The wire fixing frame comprises a limiting part, and the limiting part surrounds at least part of the peripheral side of the wire assembly and is used for limiting the position of the wire assembly relative to the stator assembly. According to the coil structure and the electronic expansion valve, the problem that the wire sealing performance of an existing electronic expansion valve coil structure is poor due to wire movement is solved.

A switch device includes a circuit board, a coil structure, a lower cover, an upper cover, an elastic part, and a sliding part. The circuit board gas a through hole running through the circuit board. The coil structure is disposed on the circuit board and surrounds the through hole. The lower cover us located over the coil structure. The upper cover is disposed on the lower cover. The lower cover and the upper cover form an accommodating space. The elastic part is located in the accommodating space. The sliding part passes through an opening of the upper cover and is configured to slide relative to the lower cover along a direction. The sliding body is configured to drive the sliding part to pass through the through hole along the direction to generate a switch signal corresponding to an inductance variance of the coil structure.

A resin film (100) comprising a core layer (2) and adhesive resin layers (1) which are respectively provided to both sides of the core layer (2), wherein: the adhesive resin layers (1) each comprise an adhesive resin composition that contains an epoxy resin; the dielectric breakdown strength of a cured product of the adhesive resin composition is not less than 300 kV / mm; the core layer (2) comprises a polyimide film; and the dielectric breakdown strength of the polyimide film is not less than 300 kV / mm.

The invention belongs to the technical field of magnetic field coil design, and particularly discloses a method and system for determining a magnetic field coil flow function based on a target field method and Adam. According to the application, the initial value of the control vector of the magnetic field coil structure is solved by using the target field method, the control vector of the magnetic field coil structure is iteratively optimized by using the Adam algorithm, and the flow function of the magnetic field coil is solved by using the optimized control vector of the magnetic field coil structure. The target field method is improved, the biplane gradient coil is designed by setting the expected magnetic induction intensity gradient value of the target point, and the Adam algorithm is used for optimizing the coil structure control vector to approach the optimal solution of the coil structure as much as possible, so that the accuracy of generating the compensation magnetic field by the coil is improved.

The invention discloses a design method of a multistage nested Helmholtz coil system, and relates to the technical field of general instrument and meter manufacturing. According to the reciprocal analysis design method for the coil structure parameters and the magnetic field characteristics of the multistage nested Helmholtz coil system under the global sensitivity, the optimal design expression of each design parameter of the multistage nested Helmholtz coil system can be determined based on the reciprocal analysis design method, and the multi-parameter expression of the magnetic field characteristics can be obtained; the coil parameter design priority is defined, and an optimization design strategy for the magnetic field design indexes is provided. When a macroscopic design requirement of a target uniform magnetic field is provided, an optimal solution of each design parameter of the multistage nested Helmholtz coil system can be directly obtained. According to the method, the Helmholtz coil can be efficiently and accurately improved and designed according to needs.

Aspects of the present disclosure generally relate to a magnetic recording head assembly that includes an external alternating current (AC) source. A magnetic recording head of the magnetic recording head assembly includes a conductive structure between a main pole and a trailing shield. The conductive structure includes a conductive layer, and the conductive layer is nonmagnetic. The magnetic recording head assembly also includes an external AC source to supply AC current that flows through the conductive structure. In one aspect, the conductive structure is between a coil structure and the trailing shield, and the external AC source is coupled to the coil structure. The conductive structure and the external AC source facilitate consistently providing an enhanced AC writing field to facilitate effective and reliable writing, high ADC, high SNR, and reduced jitter.

The invention discloses a vacuum arc extinguish chamber structure with large rated current and strong breaking capacity, which comprises a structure body, and is characterized in that the structure body comprises a static contact assembly, the static contact assembly comprises a static end arc contact and a static end main contact, and the static end arc contact is arranged in front of the static end main contact and protrudes for a preset distance d along the on-off direction; and the moving contact assembly comprises a moving end main contact and a moving end arc contact, and the moving end main contact and the moving end arc contact are located on the same plane. According to the invention, the effect that the main contact does not burn arc during breaking is realized, the contact surface of the main contact is protected from being ablated by the arc, and a physical foundation is laid for the high capacity of the vacuum arc-extinguishing chamber. The moving end arc contact is provided with a coil structure so as to generate a transverse magnetic field or a longitudinal magnetic field, and the magnetic lines of force between the static end arc contact and the moving end arc contact have the combined action of the longitudinal magnetic field and the transverse magnetic field, so that the breaking capacity is high.

The utility model discloses a laminated chip inductor, which comprises a main body and an outer electrode, the outer electrode is arranged on the outer surface of the main body, the main body comprises a plurality of conductor layers and an insulating layer, the plurality of conductor layers are laminated, and two adjacent conductor layers are isolated by the insulating layer. The conductor layer comprises a middle wire part and a leading-out part, the middle wire part is communicated with the outer electrode through the leading-out part, the leading-out part comprises a coil structure and at least two leading-out ends, and the width sum of the leading-out ends is 15%-40% of the width or length of the laminated chip inductor. By adopting the structure with multiple leading-out ends, the open circuit condition caused by ablation of the leading-out parts or change of internal stress of the inductor is effectively reduced, and the overall reliability and durability of the inductor are improved.