905 results about "Transmitter coil" patented technology

The invention belongs to the technical field of unmanned aerial vehicle full-aviation electromagnetic detection, and particularly relates to a full-aviation frequency domain electromagnetic emission system and a control method. A broadband frequency mixing and matching circuit is connected in series between an H-bridge power inverter and an emission coil of an unmanned aerial vehicle electromagnetic emission system; the broadband mixing and matching circuit comprises a first resonance unit formed by connecting a fixed capacitor and an adjustable inductor in parallel and a second resonance unit formed by connecting a fixed capacitor and an adjustable inductor in parallel, and the first resonance unit and the second resonance unit are connected in series. The adjustable inductor is matched with the dynamic impedance of the inductive load by adjusting the inductance value, and the broadband frequency mixing and matching circuit can adjust the impedance in real time, so that the matching of different resonant frequencies is realized, and the frequency range of a matching signal can be obviously widened.

The utility model provides a full-aviation transient electromagnetic detection pod. A transmitting coil is arranged at the bottom of an aircraft; the receiving coil is arranged on the inner side of the transmitting coil; the pod body comprises a first fixing ring, a rope assembly and a beam, the first fixing ring is connected with an aircraft through the rope assembly, the beam penetrates through the center of the first fixing ring, the two ends of the beam are fixedly connected with the first fixing ring, the receiving coil is fixedly connected with the beam, and the transmitting coil is arranged on the first fixing ring. The first fixing ring comprises a bending part which is curled to form a closed ring, the two ends of the bending part are locked and released through a positioning piece, the first fixing ring penetrates through the positioning piece to form a free end, and when the positioning piece releases the bending part, the bending degree of the bending part and the length of the free end can be adjusted so as to change the radial size of the closed ring. Due to the fact that the size of the pod body and the size of the transmitting coil are flexible and adjustable, the pod can obtain appropriate detection depth and detection resolution in different detection scenes, and the use cost of the pod is reduced.

A power transmission tower grounding resistance non-contact measurement method based on the electromagnetic coupling principle comprises the following steps that transmitting and receiving electromagnetic coupling coils are arranged around an iron tower grounding body, and geometric calibration and spatial positioning of a measurement area are completed by combining grounding grid structure parameters and soil conduction characteristics; injecting a high-frequency alternating-current excitation signal into the transmitting coil, and synchronously acquiring the amplitude and phase response of the induced voltage at a receiving coil end; carrying out filtering processing on the induction signal by adopting a time-frequency analysis and phase decoupling algorithm, and solving a function relationship between electromagnetic response and grounding impedance by combining a coupling equivalent model; based on experimental calibration data and scene parameters, a nonlinear mapping model of induction response and grounding resistance is constructed, and real-time inversion calculation is carried out by combining a solving result obtained in the third step. According to the invention, the real-time accurate measurement of the grounding resistance under the conditions of no power failure and no wire breakage is realized, and the safety, the operation convenience and the anti-interference capability in a complex environment in the measurement process are obviously improved.

A bearing assembly includes an annular carrier, an outer ring disposed within the carrier, the outer ring having an outer raceway and a transmitter coil spaced axially from the outer raceway. The transmitter coil is electrically connectable with a battery and is configured to generate an electromagnetic field when current flows through the transmitter coil. An inner ring is disposable about a rotor shaft and has an inner raceway and a receiver coil spaced axially from the inner raceway so as to be located proximal to and inductively coupled with the transmitter coil such that electric current is generated within the receiver coil when current flows through the transmitter coil. The receiver coil is connected to electromagnetic coils of a motor rotor such that electric current flows from receiver coil to the coils. A plurality of rolling elements are disposed between rotatably couple the outer ring with the inner ring.

The invention provides an underground pipe column detection method and system and a medium, and the underground pipe column detection system comprises detection equipment, an excitation signal generator and an underground detection device; the detection equipment is in communication connection with the excitation signal generator and the underground detection device; the underground detection device comprises a transmitting coil and a magnetic sensor array consisting of a plurality of receiving coils; the excitation signal generator is configured to apply transient excitation current to the transmitting coil; the transient excitation current enables the transmitting coil to generate an excitation magnetic field; the excitation magnetic field enables the sleeve layer to generate an induced magnetic field; the magnetic sensor array is configured to collect the magnetic field intensity of the induced magnetic field and generate a magnetic field intensity vector; the detection equipment is configured to perform sparse reconstruction solution on the target vector containing the wall thickness information of the casing layer according to the magnetic field intensity vector and the space observation matrix corresponding to the magnetic sensor array, and through the embodiment of the invention, the limitation of the number of array elements on the detection resolution can be broken through, and the detection precision of the wall thickness of the underground pipe column is improved.

The invention belongs to the technical field of aviation electromagnetic exploration, and particularly relates to a time domain aviation electromagnetic soft pod hard structure miniaturization compensation device and a design method.The device comprises a compensation-receiving coil and a transmitting coil, and the compensation-receiving coil and the transmitting coil are concentric; the compensation-receiving coil comprises a compensation coil and a receiving coil which are wound on the same annular framework, one terminal of the compensation coil is connected with a first point on the transmitting coil through a series impedance device, and the other terminal of the compensation coil is directly connected with a second point on the transmitting coil through a lead; and a transmitting coil interception section is arranged between the first point and the second point. The weight of exploration equipment can be reduced, and early noise brought by a primary field in the movement process is reduced.

A wireless charger device can support multiple different receiver devices having different wireless charging specifications. The wireless charger device can house two wireless power transmitter coils having different dimensions and arranged coaxially with each other. A first coil can have a size and shape compatible with a portable device such as a smart phone while the second coil can have a size and shape compatible with a smaller device such as a smart watch. The first coil and the second coil can deliver power through the same charging surface, or the first coil can deliver power through a first charging surface while the second coil can deliver power through a second charging surface opposite the first charging surface.

The invention relates to the technical field of wireless charging, in particular to a wireless charging system and an application method, and the system comprises m inverters, m-1 RIITs and transmitting coils at a GA end, n first rectifiers at a VA end, RIITs corresponding to n-1 first rectifiers, q second rectifiers, RIITs corresponding to q second rectifiers and receiving coils. The output ends of the n first rectifiers are connected in parallel and are used for outputting electric energy to the high-voltage battery; and the output ends of the q second rectifiers are connected in parallel and are used for outputting electric energy to the low-voltage battery. The high-voltage battery and the low-voltage battery supply energy through the receiving coil at the VA end, the charging mode can be changed by setting the working state of the rectifier, and decoupling control over charging of the high-voltage battery and the low-voltage battery is achieved. According to the invention, the size and cost of the charging structure of the VA end can be effectively reduced, and different levels of power requirements can be met by adjusting the number of inverters and rectifiers.

The invention discloses an anti-offset wireless charging method, which comprises the following steps of: constructing a transmitting coil array as a charging end, detecting a relative position between a receiving coil of equipment needing wireless charging and the charging end, calculating offset data of the receiving coil, and taking a current state of each sub-coil in the transmitting coil during charging as a decision variable; constructing a dual-objective optimization mathematical model taking the minimum mutual inductance deviation and the maximum system transmission efficiency as optimization objectives, solving the dual-objective optimization mathematical model by adopting a genetic algorithm, searching to obtain a Pareto optimal solution set, selecting the Pareto optimal solution set, and controlling the current state of a transmitting coil in a charging end; through a decision variable control mechanism based on the sub-coil current state, the control granularity is refined from the whole coil unit to the sub-coil level, so that the system can dynamically adjust the current distribution mode in the unit according to the tiny offset of the receiving coil, local fine tuning of the magnetic field intensity is realized, and the precision of the magnetic field intensity is improved. And the coupling requirement under the complex offset working condition can be effectively met.

The invention relates to the technical field of wireless power transmission, in particular to an unmanned aerial vehicle omnibearing wireless power transmission system based on a biorthogonal DD type coil, which comprises a transmitting end and a receiving end, the transmitting end comprises two transmitting coils which are mutually orthogonal, each transmitting coil is driven by a half-bridge inverter, and an LCC compensation network is connected between the transmitting coil and the half-bridge inverter; each transmitting coil is a DD-type coil formed by reversely connecting two D-type coils in series; the receiving end comprises a receiving coil, and the receiving coil is formed by connecting two rectangular coils in series in the same direction; the receiving coil is mounted on an undercarriage of the unmanned aerial vehicle; a target magnetic field is realized by controlling current in the two transmitting coils; according to the invention, the utilization rate of the magnetic field is improved while omnibearing wireless power transmission is realized.

A magnetic solar wireless charging accessory system comprises a solar wireless charging base and a wireless electrical equipment assembly, the solar wireless charging base comprises a base body, a battery module, a solar panel electrically connected to the input end of the battery module and a wireless transmitting coil electrically connected to the battery module; the wireless electrical equipment assembly comprises a housing, a wireless receiving coil, an electricity storage unit, an electrical equipment and a switch; the battery module provides electricity to the electricity storage unit through the wireless transmitting coil and the wireless receiving coil; the solar wireless charging base is positioned with the housing through a magnet. The invention has simple and reasonable structure, realizes wireless charging, it is flexible and convenient and can be applied to outdoor multiple scenes such as umbrella, sunshade fabric blind or awning.

The invention discloses a mobile wireless charging dynamic scheduling system and method based on multi-modal perception, and aims to solve the technical problem that the whole process of mobile wireless charging cannot be automatically managed due to the fact that the current mobile wireless charging dynamic scheduling system cannot be deeply coordinated in the use process. The multi-mode sensing unit is used for monitoring and acquiring information of environment obstacles, a spatial topological structure, dynamic path information, equipment identity, battery health degree, charging state parameters, and spatial alignment and energy transmission efficiency of a transmitting coil and a receiving coil; and the space-time calibration and data fusion module is used for realizing space-time synchronization of the sensor based on an SST-Calib algorithm. Through deep cooperation of multi-mode perception, intelligent decision and accurate execution, full-process automatic management of mobile wireless charging is realized, and the system is suitable for high-efficiency energy scheduling requirements of scenes such as intelligent manufacturing, logistics storage and intelligent transportation.

Methods and systems for dynamic wireless power transfer to charge an electric vehicle (EV) in motion are provided. The method can include: transmitting wireless power from a plurality of main transmitter coils; transmitting wireless power from a assisted coil disposed between each pair of adjacent main transmitter coils; receiving the wireless power at a receiver coil when the electric vehicle is charged in motion; providing a primary compensation network coupled to the main transmitter coils and the assisted coils; and compensating for reactive power at a secondary side by a secondary compensation network coupled to the receiver coil. Dimensions and positions of the assisted coils and parameters of the compensation network are configured to maintain a substantially constant mutual inductance profile between the transmitter coils and the receiver coil when the electric vehicle is charged in motion, thereby reducing power pulsation and providing a stable output voltage to the battery of the EV.

The invention discloses an EVDWPT ground control box group power synchronization method based on optical fiber synchronous frequency modulation. The method comprises the steps that a vehicle-mounted end sends a square wave signal containing a power level to a power supply cabinet through a signal transmitter; the power supply cabinet analyzes the power level in the square wave signal, generates a cooperative control signal containing a synchronous pulse frequency fine tuning instruction and a phase shift angle adjusting instruction, obtains the current guide rail position of the vehicle emitting the square wave signal, and sends the cooperative control signal to the inverter box corresponding to the guide rail position; the inverter box adjusts the working frequency to the target frequency according to the synchronous pulse frequency fine tuning instruction, and adjusts the phase difference between the output voltage fundamental wave and the current according to the phase shift angle adjusting instruction; and the inverter box drives the corresponding transmitting coil according to the adjusted target frequency and the phase shift angle so as to output power matched with the power level to the vehicle-mounted end receiving coil, so that the vehicle power matching requirement is met. According to the invention, while compatible charging of the multi-power-level vehicle is realized, soft switching starting of the inverter can be ensured.

The invention relates to a seabed trapezoidal foldable electromagnetic coil device, which belongs to the technical field of ocean electromagnetic detection and comprises a main bearing beam, an expandable transmitting coil assembly, a receiving coil assembly, a transmission connecting rod, a hinged rotating seat, a sliding connecting seat and a push-pull driving rod. The transmitting coil is of a symmetrically-distributed trapezoidal structure, the receiving coil is in sliding fit with the main bearing beam through the sliding connecting base, the push-pull driving rod is in linkage with the receiving coil to move and the transmitting coil to be unfolded / folded, the device frame is made of a macromolecule non-magnetic material, and the ferromagnetic driving component is arranged in an avoiding mode. Receiving coil plane magnetic field balance is achieved through the non-uniform magnetic field design of the trapezoidal transmitting coil, coil space optimization configuration is completed through a linkage mechanism, folding portability and anti-interference performance of a multi-layer coil are achieved at the same time, direct coupling of a primary field of the transmitting coil to receiving is effectively restrained, the stability and the signal-to-noise ratio of a detection signal are improved, and the detection precision is improved. The method is suitable for complex seabed transient electromagnetic detection scenes carried by AUV / ROV.

The invention discloses an array-type UWPT system, and the system comprises an energy inversion module which comprises a DC power supply and a full-bridge inversion circuit, and the DC power supply is connected with the input end of the full-bridge inversion circuit through a wire, and provides energy for the inversion process of the system; the resonance compensation network comprises a transmitting / receiving side compensation capacitor, and the transmitting / receiving side compensation capacitor comprises a transmitting side compensation capacitor Ctx and a transmitting side compensation capacitor Crx; the reconfigurable coupling mechanism comprises n transmitting coil groups Ltx and m receiving coil groups Lrx; the energy receiving module comprises a bridge rectifier circuit and a load RL; the direct-current power supply is connected with the full-bridge inverter circuit in series, the full-bridge inverter circuit is connected with the transmitting / receiving side compensation capacitor, and the transmitting side compensation capacitor Ctx and the transmitting coil assembly Ltx are connected in series and then connected to the output end of the full-bridge inverter circuit to form an LC series resonance circuit. The n transmitting coil groups and the m receiving coil groups perform energy transmission through electromagnetic coupling, and the receiving coil groups generate high-frequency alternating current after sensing magnetic field changes of the transmitting coils and are connected to the input end of the bridge rectifier circuit through wires.

The invention relates to the technical field of high-precision positioning, in particular to a high-precision six-degree-of-freedom magnetic positioning system and method, and the method comprises the steps: generating a three-dimensional low-frequency magnetic induction field with a preset frequency in a space through a three-axis orthogonal transmitting coil; detecting the three-dimensional low-frequency magnetic induction field through a three-axis orthogonal receiving coil to obtain an induced voltage signal; transmitting the digitized induced voltage signal to a control layer; in the control layer, the position and attitude of the receiver are estimated in real time by using a joint estimation algorithm fusing error state extended Kalman filtering and particle swarm optimization; the error state extended Kalman filtering comprises the steps of constructing a state transition matrix F of a target carrying a receiver, and constructing a process noise covariance matrix Qk and a parameterized measurement noise covariance matrix R of the system through translation acceleration noise sigma a and rotation noise sigma omega. According to the invention, the PSO module is utilized to dynamically and adaptively adjust the key parameters of the ESKF, and high-precision positioning and low-delay response are realized.

Arrangements herein are directed to pin state detection systems and arrangements for using such systems. A pin detection system can include a pin. The pin can be in one of multiple states, such as a depressed state and an undepressed state. The system can include a transmit coil and a receive coil that encircles the pin. The system can also include a processing system that causes a transmit signal to be transmitted to the transmit coil. The processing system can analyze a signal received from the receive coil to determine a state of the pin.

An inductive sensor is integrated on a printed circuit board assembly (PCBA) of an electrical protective device, such that the inductive sensor is configured to contactlessly measure angular motion of an electrically conductive target mounted on the PCBA corresponding to a component of the electrical protective device. The inductive sensor comprises an integrated circuit, a transmitter coil, and receiver coils spaced apart vertically from the electrically conductive target. The integrated circuit is electrically coupled to the transmitter coil such that the integrated circuit is configured to transmit a high frequency time varying signal into the transmitter coil. The high frequency time varying signal energizes the transmitter coil thereby inducing a magnetic field. The magnetic field induces one or more output signals on the receiver coils and eddy currents in the electrically conductive target. The eddy currents produce a counter magnetic field that alters the output signals responsive to an angular displacement of the electrically conductive target.

A wearable device comprising a transmitter coil having variable transmission resistance, a first transmission impedance, and a second transmission impedance; an implanted device, comprising a receiver coil having a variable reception resistance, a first reception impedance, and a second reception impedance; wherein the transmitter coil can wirelessly transmit information over a variable frequency to the receiver coil when the variable resistance of the transmitter coil is tuned to the variable resistance of the receiver coil, the transmitter coil is configured to the first transmission impedance, and the receiver coil is configured to the first reception impedance; wherein the transmitter coil can wirelessly transmit power to the receiver coil when the transmitter coil is configured to the second transmission impedance and the receiver coil is configured to the second reception impedance; and wherein the transmitter coil can wirelessly transmit to the receiver coil of the implanted device using a magnetoquasistatic field.

The embodiment of the invention relates to jitter compensation calibration. According to one embodiment, a method for calibrating a local oscillator in an amplitude shift keying (ASK) demodulator of a wireless power transmitter is presented. The method includes: receiving a digital signal corresponding to a voltage or a current of a transmitter coil in a wireless power system implemented with frequency jitter; iteratively adjusting a counter value associated with a jitter table of the local oscillator; wherein for each iteration, the method comprises generating an in-phase (I) component and a quadrature (Q) component using a local oscillator, calculating a metric based on the I component and the Q component, and storing a counter value if the calculated metric exceeds a previously stored optimal metric; and configuring the local oscillator with the stored counter value associated with the optimal metric.

The invention discloses an omnidirectional wireless electric energy transmission device, and belongs to the technical field of wireless electric energy transmission. The device comprises a regular octahedron framework and a transmitting coil which is continuously and unidirectionally wound along the edge of the regular octahedron framework, and the winding directions of adjacent triangular frameworks are opposite so as to generate an enhanced magnetic field which is matched with a first resonance compensation network and a high-frequency power supply system to work. A receiving end adopts three groups of coil units which are orthogonally arranged in the same plane and are mutually isolated to form a receiving coil, and each group is connected with an independent second resonance compensation network to form a resonance rectification branch. According to the structure, an omnidirectional uniform magnetic field is generated through unique regular octahedron coil arrangement, so that receiving equipment can be efficiently charged at any angle and position in a large range, and the structure has high tolerance to rotation and offset. The planar orthogonal receiving coil can capture more magnetic flux in a three-dimensional space, the transmission efficiency is improved, cross coupling is effectively restrained, and meanwhile the planar orthogonal receiving coil can be conveniently integrated in a mobile phone, a computer and other devices through the flat design.

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

The invention discloses a foreign matter detection parameter calibration method and system for wireless charging. According to the foreign matter detection parameter calibration method for wireless charging, it is confirmed that a transmitting coil of a charger and a receiving coil of a device to be charged are adjusted to preset relative positions; adjusting the transmitting power of the transmitting coil at the preset relative position; power loss values are calculated to obtain the power loss values calibrated at the preset relative position under different transmitting power conditions, and the power loss values serve as foreign matter detection parameters. Thus, the accuracy and sensitivity of wireless charging foreign matter detection are improved through self-adaptive calibration of the power loss values under different transmitting power conditions in different coupling states, the false alarm rate is remarkably reduced, and therefore the user experience and the charging safety are improved; the problems of inaccurate detection, high false alarm rate, poor compatibility and the like caused by a fixed threshold value or lack of dynamic self-adaptive capability are effectively solved.

The invention belongs to the technical field of wireless charging, and particularly relates to an in-vitro charging device of a wireless charging system and implantable medical equipment, the in-vitro charging device comprises an inverter and a transmitting coil array, and the inverter is electrically connected with the transmitting coil array so that a transmitting coil can generate an induced magnetic field; wherein the transmitting coil array comprises at least two coil units which are connected in series, and all the coil units are coaxially superposed; the coil unit comprises two coils connected in series, and the two coils are symmetrically arranged and partially overlapped. The four-coil array is innovatively adopted as the transmitting end, magnetic decoupling is achieved among the coils through a special spatial arrangement mode, and it can be always guaranteed that at least part of the coils and the receiving coil of the in-vivo charging device are in a good coupling state under the condition of deviation in any direction through the design.

Embodiments described herein are directed to a position sensor that includes a first receiver coil electrically coupled to a first multiplier to generate a first output, a second receiver coil electrically coupled to a second multiplier to generate a second output, a transmitter coil electrically coupled to an oscillator, the oscillator electrically coupled to a third multiplier to generate a third output, a phase-locked loop electrically coupled to the oscillator and the transmitter coil, a summing circuit configured to receive the first output and the second output and configured to generate a signal, a phase detector configured to receive the signal and the third output, the phase detector outputting a sense signal that is indicative of an angle of the motor position sensor, and a pair of op amps electrically coupled to the phase detector. The op amps configured to output an analog differential signal and a differential phase signal.

The invention provides a self-adaptive tuning matching and control system of a magnetic resonance radio frequency transmitting coil, and belongs to the technical field of magnetic resonance imaging. The system is composed of a radio frequency transmitting coil, a tuning matching circuit of the radio frequency transmitting coil, an automatic adjusting device, a scattering parameter measuring device, an upper computer interaction module, a PC and a computer processing program. During working, the system only needs to pre-store a group of optimal tuning and matching scattering parameters, after different parts of different human bodies enter the center of the body coil, tuning and matching circuits can be continuously adjusted, changes of the scattering parameters in the adjusting process are collected in real time, and the rotating direction of a tuning strip matching motor can be automatically judged; and the accurate tuning frequency and the optimal matching state are quickly obtained, so that the optimal transmitting efficiency is achieved.

The invention provides magnetic coupling wireless simultaneous energy and signal transmission equipment and a circuit for an autonomous underwater vehicle, and solves the technical problems of large size and low power density of the existing magnetic coupling wireless simultaneous energy and signal transmission equipment. The device comprises a magnetic core assembly, and further comprises an energy transmitting assembly and an information receiving and transmitting coil which are orthogonally overlapped on the magnetic core assembly, the magnetic core assembly comprises a first magnetic core and a second magnetic core, the energy transmitting assembly comprises an energy transmitting coil, a compensation coil assembly and a compensation capacitor assembly, and the energy transmitting coil, the compensation coil assembly and the information receiving and transmitting coil are excited in a current direction orthogonal mode; the energy transmitting coil, the first magnetic core, the compensation coil assembly and the second magnetic core are stacked in sequence, the energy transmitting coil and the compensation coil assembly are connected through the compensation capacitor assembly, and the winding direction of the energy transmitting coil and the winding direction of the compensation coil assembly are perpendicular to each other. The method can be widely applied to the technical field of wireless energy and information simultaneous transmission.

The invention discloses a three-frequency-based three-dimensional omnidirectional wireless electric energy transmission system, which relates to the technical field of wireless electric energy transmission and comprises a direct-current power supply, three high-frequency inverters, three transmitting coils, three planar single-pole receiving coils, a planar single-pole load coil, a rectifier and a load. The three transmitting coils are orthogonally arranged and have different resonant frequencies, the three receiving coils and the load coil are located on the same plane, and the load coil surrounds the three receiving coils and is inductively coupled with the three receiving coils; each high-frequency inverter is connected with a direct-current power supply and a corresponding transmitting coil, the three receiving coils are respectively in resonant coupling with the three transmitting coils through three frequencies, the input end of the rectifier is connected with a load coil, and the output end of the rectifier is connected with a load. The device is suitable for simultaneous charging of multiple devices, transmission is stable, and practicability is high.

The invention relates to a wireless charging fabricated pavement and a construction method thereof.The pavement comprises a prefabricated concrete pavement base plate, a prefabricated transmitting coil module, an asphalt mixture thin layer and a transmitting coil control system, and the prefabricated concrete pavement base plate is arranged on the bottom layer; the prefabricated transmitting coil module is installed on the prefabricated concrete pavement base plate and communicated with the prefabricated concrete pavement base plate to form a continuous structure, and the asphalt mixture thin layer is laid on the surface layer of the continuous structure to form a wireless charging pavement traveling layer. And the transmitting coil control system is connected with the precast concrete pavement substrate through a cable. Compared with the prior art, the invention has the advantages of rapid assembly, stable operation, convenient maintenance and the like of the wireless charging road surface.