2312 results about "Transmitter coil" patented technology

The invention discloses a transient electromagnetic three-dimensional dike leakage hidden danger detection method based on unmanned aerial vehicle carrying, and the method comprises the steps: S1, scanning a detection region range, obtaining dike terrain remote sensing image and point cloud image data, and setting a flight path of an unmanned aerial vehicle according to a preset detection region range; s2, performing task flight, and transmitting transient electromagnetic pulse signals with different frequencies to the underground of the dike through a transmitting coil according to a transmitting current frequency range; s3, a receiving coil is used for synchronously collecting secondary electromagnetic response signals generated by underground medium induction, discretization sampling is conducted on the collected signals according to the sampling time interval, and a sampling data sequence is obtained; s4, constructing a three-dimensional resistivity model of the dike underground medium through a three-dimensional inversion algorithm; and S5, through the constructed three-dimensional resistivity model, multi-dimensional features of the leakage hidden danger are extracted, and an area with the leakage hidden danger in the dike is identified. The leakage hidden danger area can be rapidly identified, and the detection efficiency and precision are improved.

An inductive sensor system may comprise an upper rotor comprising an upper target having a first metallic pattern; a lower rotor comprising a lower target having a second metallic pattern; and a stationary circuit board positioned between the upper rotor and the lower rotor. The circuit board comprises one or more transmitter coil sets configured to generate electromagnetic field, and one or more receiver coil sets for sensing relative angular displacement movement between the upper rotor and the lower rotor. The one or more transmitter coil sets and the one or more receiver coil sets are circularly wound.

The invention provides an unmanned aerial vehicle array type aviation multi-component electric field and magnetic field cooperative detection system and detection method. The detection system comprises an unmanned aerial vehicle array, a transmitting unit, a plurality of receiving units and a ground auxiliary unit. The unmanned aerial vehicle array comprises a master unmanned aerial vehicle and a plurality of slave unmanned aerial vehicles; the transmitting unit is used for transmitting primary electromagnetic field pulses; the transmitting unit comprises a loop source transmitting device, and the loop source transmitting device comprises a current transmitter, a transmitting coil and a compensating coil; the plurality of receiving units are respectively mounted under the master unmanned aerial vehicle and the slave unmanned aerial vehicle and are used for acquiring electromagnetic data after the primary electromagnetic field pulse acts on the to-be-detected area, and the electromagnetic data comprise a horizontal component electric field signal and a three-component magnetic field signal; each receiving unit comprises a capacitive electric field sensor, a three-component coil magnetic field sensor and an electromagnetic data receiver; and the ground auxiliary unit is used for controlling acquisition of the horizontal component electric field signal and the three-component magnetic field signal, and performing electromagnetic data processing to obtain underground space electrical information of the detection area.

The invention provides a multi-parameter MIMO (Multiple Input Multiple Output) aviation time-frequency detection system and method, which can be applied to the technical field of underground medium detection. The system comprises a flying platform, a transmitting subsystem, a receiving subsystem and a measurement and control subsystem, and the transmitting subsystem is configured to load a first current pulse into a transmitting coil through a first current transmitter to achieve primary electromagnetic field excitation and load a second current pulse into a compensation coil through a second current transmitter to achieve secondary electromagnetic field excitation. Compensation electromagnetic field excitation is realized; the receiving subsystem is configured to be used for sampling the first current pulse and the second current pulse and collecting secondary electromagnetic field response to obtain underground medium electrical information of the target detection area; and the measurement and control subsystem is configured to send a control instruction to the transmitting subsystem and the receiving subsystem according to a sampling result and set detection parameters and monitor the working state of the detection system, and the measurement and control subsystem adjusts the first current pulse and the second current pulse in real time.

The invention relates to a device (10; 10a) for inductive energy transfer into a human body (1), having a transmitter unit (11) with a housing (12), in which at least one transmitter coil (14) is arranged, wherein the housing (12) comprises a contact surface (23), which is configured in order to be brought into surface contact with the body (1), and a receiver unit (20) that can be positioned in the body (1) with a receiver coil (21), wherein a heat-insulating element (26) and a heat-conducting element (30; 30a) are arranged between the transmitter coil (14) and the body.

The invention provides an aviation transient electromagnetic fast Bayesian inversion method, device and equipment, and relates to the technical field of geophysical signal processing and analysis, and the aviation transient electromagnetic fast Bayesian inversion method comprises the steps: obtaining a resistivity model and the height of a transmitting coil; the resistivity model and the transmitting coil height serve as input data, electromagnetic response data serve as output data, a deep learning network model is trained, and a forward modeling model is obtained; coupling the forward modeling simulation model to a parallel Bayesian inversion framework to generate a target network model; and performing resistivity inversion and quantitative uncertainty analysis on to-be-analyzed aviation transient electromagnetic data based on the target network model to obtain an analysis result. By integrating a deep learning forward simulator into a Bayesian inversion framework, rapid Bayesian inversion and quantitative uncertainty estimation of aviation transient electromagnetic data can be realized, and the inversion efficiency is greatly improved.

The embodiment of the utility model provides clothes processing equipment which comprises a clothes processing drum and a wireless energy supply assembly, the wireless energy supply assembly comprises a transmitting module, a receiving module and at least one support, the transmitting module is arranged on a part outside the clothes processing drum, and the receiving module is arranged on the clothes processing drum; the transmitting module comprises a transmitting coil, the receiving module comprises a receiving coil, and the receiving coil is used for receiving electromagnetic signals transmitted by the transmitting coil and generating induction current; the at least one support is used for supporting the transmitting coil and / or the receiving coil. According to the clothes processing equipment provided by the embodiment of the invention, the transmitting module and the receiving module can transmit electric energy without contact, and electric energy transmission between the relatively rotating clothes processing drum and the relatively static clothes processing drum is realized. The electrical apparatus element of the clothes processing equipment can be arranged in the clothes processing drum, and the receiving module supplies power to the electrical apparatus element, so that the electricity demand of the electrical apparatus element is met, and the close-range sensing of the clothes state is facilitated.

The invention provides an anti-offset unmanned aerial vehicle wireless charging system and a parameter design method thereof, which are used for solving the technical problem of low charging efficiency caused by transverse and rotary offset of a coupling mechanism of an existing unmanned aerial vehicle wireless charging system. The system comprises a transmitting end and a receiving end, and is characterized in that the transmitting end comprises a transmitting coil, the transmitting coil comprises an inner side transmitting sub-coil and an outer side transmitting sub-coil which are coaxially arranged, and the inner side transmitting sub-coil is arranged on the inner side of the outer side transmitting sub-coil; the receiving end comprises a receiving coil and a secondary compensation circuit, the secondary compensation circuit comprises a secondary compensation coil, and the secondary compensation coil is attached to the end face of one side of the receiving coil. According to the invention, the magnetic coupling mechanism and the LCC-LCC compensation network are integrated together, and the dislocation tolerance and reliability of the wireless charging system of the unmanned aerial vehicle are enhanced through the parameter design of the turn spacing and the number of turns of the transmitting coil. And the zero-voltage switching effect is obtained through parameter design of the receiving coil and the secondary compensation coil.

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 embodiment of the utility model provides clothes processing equipment, which comprises a box body, a clothes processing drum, a main control board, a wireless energy supply assembly and a cable, and is characterized in that the box body comprises a rear plate; the wireless energy supply assembly comprises a transmitting module and a receiving module, and the receiving module is used for receiving an electromagnetic signal transmitted by the transmitting module and generating an induced current; the transmitting module comprises a transmitting coil, the transmitting coil is arranged on the side, facing the clothes processing drum, of the rear plate, and the transmitting coil and the main control board establish a conductive path through a cable; the rear plate is provided with a first wire passing opening, one end of the cable is connected with the transmitting coil, and a part of the cable penetrates out of the first wire passing opening to the side, away from the clothes processing drum, of the rear plate. According to the clothes processing equipment, the transmitting module and the receiving module can transmit electric energy without contact, wire connection is not needed, the reliability is high, the electricity utilization requirement of electrical elements can be met, the clothes state can be sensed in a close range, and specific functions are achieved.

The embodiment of the utility model provides clothes processing equipment which comprises a clothes processing drum and a wireless energy supply assembly, the wireless energy supply assembly comprises a transmitting module and a receiving module, the transmitting module is arranged on a part outside the clothes processing drum, the receiving module is arranged on the clothes processing drum, the transmitting module comprises a transmitting coil and a transmitting circuit board, and the transmitting coil is arranged on the transmitting circuit board. The transmitting coil is electrically connected with the transmitting circuit board, the receiving module comprises a receiving coil and a receiving circuit board, the receiving coil is electrically connected with the receiving circuit board, and the receiving coil is used for receiving electromagnetic signals transmitted by the transmitting coil and generating induction current. According to the clothes processing equipment provided by the embodiment of the invention, the transmitting module and the receiving module can transmit electric energy without contact, electric energy transmission between parts except the relatively rotating clothes processing drum and the relatively static clothes processing drum is realized, electric energy transmission can be realized without wire connection, and the reliability is high.

The invention discloses a composite control method of a wireless power transmission system, the system comprises a transmitting end and a receiving end, and the transmitting end comprises a voltage source, a full-bridge inverter circuit, a transmitting end S network and a transmitting coil; and the receiving end comprises a receiving end S network, a high-frequency rectification filter circuit, a double-tube Buck-Boost circuit and a load RL. The control method can realize compound control of coupling coefficient identification, maximum efficiency tracking and constant voltage output. The problem that in the prior art, when a coupling coil shifts and loads suddenly change, a system cannot carry out efficient and stable output is solved, and compared with existing common PI control, the linear active-disturbance-rejection technology used in the invention is better in control effect.

The invention relates to the technical field of clothes treatment, in particular to clothes treatment equipment, and aims at solving the problem that in the prior art, an electric device on an inner barrel of the clothes treatment equipment is poor in electrifying effect. To this end, the laundry treating apparatus according to the present invention comprises: an inner tub rotatably provided; the electric component is arranged to rotate along with the inner cylinder; and the power supply component comprises a transmitting coil and a receiving coil, the transmitting coil is fixedly arranged and is coaxial with the rotating shaft of the inner cylinder, the receiving coil is installed on the inner cylinder, the receiving coil and the transmitting coil are eccentrically arranged, a part of or all the receiving coil is arranged in the coverage range of the transmitting coil, and the receiving coil is electrically connected with the electric component. The receiving coil is continuously located in the magnetic induction line coverage range of the transmitting coil when rotating along with the inner cylinder, the electricity induction effect of the receiving coil is improved, and the situation that a power supply component supplies power to an electric component intermittently is avoided.

To provide a full-rotation type non-contact power transmission connector device.SOLUTION: A full-rotation type non-contact power transmission connector device includes a power supply module a full-bridge inverter module, a primary-side resonance compensation module, a full-rotation type ball connector module, a secondary-side resonance compensation module, and a full-bridge rectification module. The power supply module supplies a supply voltage required for the device. The full-rotation type ball connector module provides radial rotation between a ball head device and a ball seat device, and a receiving coil and a transmitting coil are located in the ball head device and ball seat device, respectively. The primary- and second-side resonance compensation modules include primary- and secondary-side LCC reactive power compensation modules and primary- and secondary-side coil capacitors.SELECTED DRAWING: Figure 6

The invention relates to a multi-phase magnetic coupling structure, a series compensation circuit and a wireless charging system, and relates to the technical field of wireless power transmission, the multi-phase magnetic coupling structure comprises a primary side magnetic energy emission structure and a secondary side magnetic energy receiving structure, the primary side magnetic energy emission structure comprises a first magnetic core and an emission coil; the secondary side magnetic energy receiving structure comprises a second magnetic core and a receiving coil; the transmitting coil and the receiving coil are both multi-phase bipolar coils; therefore, the magnetic coupling structure provided by the invention is higher in magnetic field intensity, higher in power density and obviously improved in transmission efficiency, the transmission efficiency of the structure can reach more than 94% after the front end voltage is increased to 50V, and the highest efficiency is close to 96%.

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 the cased well stratum model, resistivity is measured by adopting an apparent resistivity extraction method based on a late signal, or an anomaly-background method based on a middle signal, or a compensation differential coil structure; the compensation differential type coil structure comprises a transmitting coil and at least one compensation coil system, the compensation coil system at least comprises a first receiving coil and a second receiving coil which are sequentially arranged, the transmitting coil and the second receiving coil are wound in the forward direction, and the first receiving coil serves as the compensation coil and is wound in the reverse direction; and the transmitting coil and the compensating coil system are sequentially arranged from front to back. 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 belongs to the technical field of transcranial magnetic stimulation medical treatment. The problems that in an existing transcranial magnetic stimulation technology, the focusing performance of a deep specific brain area is not high, positioning is not accurate, and full-path superficial layer tissue is strongly stimulated are solved. According to the deep transcranial magnetic stimulation positioning navigation system based on time interference, based on the time interference principle, stimulation currents with different frequencies are applied to two sets of transmitting coils, low-frequency envelope waves are overlaid in the skull, and therefore the current magnitude is reduced, and the focusing degree is improved. Data support is provided for accurate positioning of the head posture of a patient based on a depth camera, and a multi-degree-of-freedom coil capable of generating an omni-directional magnetic field in space is provided. By reasonably adjusting the amplitude of the current introduced into the coil, the magnetic field can automatically move to the stimulation point of the head of the patient for treatment, the stimulation target is changed by adjusting the electrical parameters, and the low-frequency envelope magnetic field is obtained by modulation at the stimulation target, so that the target neurons are magnetically stimulated.

Provided herein are reconfigurable intelligent surfaces (RIS) including a surface, a source tile positioned on or proximate a first side of the surface and including a source power layer including a power amplifier and a transmitter coil configured to generate an electromagnetic field and a radio frequency (RF) layer configured to receive power from the source electromagnetic field, and a patch antenna grid for reflecting a RF signal, and a plurality of extender tiles positioned on or proximate the first side of the surface, the extender tiles each including an extender power layer including a passive transceiver coil for receiving the source electromagnetic field and relaying the source electromagnetic field as an extender electromagnetic field and an extender RF layer configured to receive power from the extender electromagnetic field, and an extender patch antenna grid for reflecting at least one of the RF signal or a second RF signal.

The invention discloses a radius-adjustable compensation anti-magnetic flux transient electromagnetic measurement device and method, and relates to the field of transient electromagnetic exploration, and the device comprises a transmitter, a receiver, a transmitting coil, a compensation coil and a receiving coil. The transmitting coil and the compensating coil are connected in series and are connected with two poles of the transmitter, and the receiver is connected with two ends of the receiving coil; the compensating coil is arranged on the outer side of the receiving coil; the transmitting coil is arranged on the outer side of the compensating coil; an adjustable buckle is arranged on the compensation coil; the adjustable buckle is used for adjusting the radius of the compensation coil. The reverse magnetic flux is adjusted by adjusting the radius of the compensation coil, so that primary field influences such as self-inductance and mutual inductance are effectively eliminated, more accurate secondary field response signals are obtained, and more reliable transient electromagnetic exploration data can be obtained.

The present invention provides a rotation driving device and an LED light strip rotation imaging device, wherein the rotation driving device comprises a motor for driving the LED light strip to rotate, a control panel for controlling the operation of the LED light strip, a receiving coil for receiving electromagnetic energy to supply power to the LED light strip, a transmitting coil for transmitting electromagnetic energy to the receiving coil, and a wireless transmitting panel for controlling the transmitting coil; the motor comprises a stator and a rotor rotatably installed in the stator, the transmitting coil and the receiving coil are respectively arranged as flat coils, the receiving coil and the transmitting coil are respectively arranged around the rotor, and the transmitting coil and the receiving coil are arranged in parallel and at intervals. In the process of wireless power supply, since the transmitting coil and the receiving coil are integrated in the rotor part of the motor, a strong eddy current effect will not be generated in the entire motor, thus avoiding eddy current heating in the motor and causing failure, reducing energy loss in the process of wireless power supply, shortening the distance between the transmitting coil and the receiving coil, and improving the wireless transmission efficiency of electromagnetic energy.

The invention discloses a regulation and control method for security check door magnetic field accurate compensation and efficient production, and relates to the technical field of security check device.The regulation and control method comprises the specific steps that S100, magnetic field detection and positioning are conducted, specifically, distribution of a magnetic field around a security check door detection coil is analyzed in detail through electromagnetic field simulation software and a magnetic field measuring instrument, the position and the shape of the compensation coil are planned through comprehensive magnetic field analysis and regulation and control area selection, the compensation magnetic field is generated by using the reversely wound coil, the current induced by the transmitting coil in the detection coil when no metal passes through is effectively counteracted, the false alarm rate is greatly reduced, and meanwhile, the detection accuracy is improved. In addition, by constructing a standardized production system, unified and mechanical production of the security door is achieved, the production efficiency is improved, the production cost is reduced, powerful support is provided for large-scale application of the security door, the problem that the performance of the security door is unstable is solved, and innovation of the security door production technology is promoted.

An apparatus, comprising: a first transmitting coil including at least one first portion and at least one second portion, the first and second portions having different polarities; and a second transmitting coil that is disposed above or below the first transmitting coil, the second transmitting coil including at least one third portion and at least one fourth portion, the third and fourth portions having different polarities, wherein the first and second transmitting coils are configured so that, when the first transmitting coil is not driven and the second transmitting coil is driven, a net magnetic flux through at least one of the first portions is approximately zero, the net magnetic flux being a magnetic flux that is entirely attributable to the second transmitting coil.

A wireless power transmitter and methods to: determine a transmitter frequency bandwidth of the wireless power transmitter when no wireless power receiver is inductively coupled with the wireless power transmitter; determine a transmitter-receiver frequency bandwidth when a wireless power receiver is inductively coupled with the wireless power transmitter; compare the transmitter-receiver frequency bandwidth and the transmitter frequency bandwidth; and detect a foreign object near the transmit coil based on the comparison of the transmitter-receiver frequency bandwidth and the transmitter frequency bandwidth.

The invention discloses a pipeline monitoring device and method based on an ultrasonic phased array, and the method comprises the steps: a plurality of pulse excitation electric signals generated by a pulse transmitting and collecting unit are transmitted and converted through a transmitting coil and a receiving coil, and generated induction pulse electric signals are transmitted to a flexible ultrasonic array transducer; the flexible ultrasonic array transducer is used for detecting the loss of the detected object and converting an ultrasonic pulse signal into an electric pulse signal; the receiving coil and the transmitting coil perform transmission and conversion again, and the generated induction pulse voltage signal is sent to the pulse transmitting and collecting unit and is further converted into a digital voltage waveform signal; and the signal processing and imaging unit is used for processing and displaying the digital voltage waveform signal and imaging the internal structure in the detected object. According to the invention, the piezoelectric ceramic element is adhered to the flexible printed circuit substrate and is fixed on the detected pipeline structural member, so that the problem of continuous monitoring of pipeline defects is solved.

A system for inductive energy transfer may include a stationary induction charging device including a stationary energy coil, a mobile induction charging device including a mobile energy coil, and a positioning device configured to detect a positioning of the stationary energy coil and the mobile energy coil relative to one another. During a charging operation of the system, one of energy coils may provide an alternating magnetic field which induces a voltage for energy transfer in the other energy coil and / or the induction charging devices may be disposed spaced apart from one another in a height direction. The positioning device may include i) four transmission coils in one of the induction charging devices and ii) at least one receiver in the other induction charging device. The transmission coils may, during a positioning operation, provide positioning fields that are distinguishable from one another.

A hearing system having a hearing device, including a receiver antenna assembly with a receiver core having a relatively high magnetic permeability and a receiver coil wound around the receiver core, operably connected to a rechargeable power source, and a hearing device charger, including a transmitter antenna assembly, with a transmitter core having a relatively high magnetic permeability and a transmitter coil wound around the transmitter core, operably connected to a power supply. The respective configurations of the hearing device and the hearing device charger may be such that when the hearing device is in a charging position on the hearing device charger, the receiver core and the transmitter core together provides a closed loop path for magnetic flux.

The invention relates to the technical field of clothes treatment, in particular to clothes treatment equipment, and aims to solve the problem that clothes treatment equipment in the prior art cannot accurately detect the drying degree of clothes. To this end, the clothes treating apparatus of the present invention comprises: a drying drum rotatably arranged; the dryness judging sensor is arranged on the lifting rib in the drying cylinder and used for detecting the dryness degree of the clothes; the signal transmitting module is arranged to rotate along with the drying cylinder and is in communication connection with the dryness judging sensor; and the power supply component comprises a transmitting coil and a receiving coil, the transmitting coil is fixedly arranged, the receiving coil is installed on the drying cylinder, and the receiving coil is electrically connected with the signal transmitting module and the dryness judgment sensor. The dryness judgment sensor is arranged on the lifting rib and can make contact with the clothes for a long time at a short distance, so that the drying degree of the clothes is more accurately detected, and the power supply component prevents the dryness judgment sensor from rotating along with the drying cylinder to cause breakage of a circuit.

The utility model provides a transient electromagnetic detection device, and mainly relates to the field of transient electromagnetic detection equipment. A transient electromagnetic detection device comprises a chassis. The beneficial effects of the utility model lie in that the rotatable supporting rod is arranged in the middle of the chassis, so that the transmitting and receiving coil can rotate, the vertical surface of the cavern can be detected, the transmitting and receiving coil can also be rotated to the ground direction, the ground direction of the cavern can be detected, and the rotating wheel and the push rod are further arranged, so that the detection accuracy is improved. A telescopic supporting rod is further arranged to enable the transmitting and receiving coil to ascend and descend and used for adjusting the height of the transmitting and receiving coil and adjusting the detection height position, an electric push rod capable of adjusting the telescopic length of the transmitting and receiving coil is arranged on the rear portion of the transmitting and receiving coil, and the extension length of the transmitting and receiving coil is adjusted. And the positions of the inner and outer transmitting coils can be respectively adjusted to adapt to more rock wall shapes and increase the use scenes of the device.

The invention discloses an optimization design method for an unmanned aerial vehicle wireless charging anti-offset magnetic coupler. The optimization design method comprises the steps of parameter preset processing, parameter optimization design and multi-dimensional performance comprehensive evaluation. Wherein the working frequency, the energy transfer distance, the receiving coil parameter and the maximum radius of the transmitting coil of the system are preset based on the size and the anti-offset requirement of the unmanned aerial vehicle, and a ferrite structure is configured; dynamically adjusting the number of turns of inner and outer rings and the radius of the inner ring of the transmitting coil by adopting a multi-layer nested traversal circulation method, and screening parameter combinations with stable mutual inductance fluctuation through finite element simulation; and an optimal scheme is selected by combining quantitative evaluation of an anti-offset range, coupling strength and a magnetic field uniformity index. According to the method, multiple coil types and ferrite structures are compatible through parametric modeling and a dynamic optimization mechanism, the anti-offset capability and the system reliability are remarkably improved, an optimization design adaptive to a complex scene is rapidly generated, and the efficient wireless charging requirement of the unmanned aerial vehicle in a dynamic environment is met.

The invention relates to the technical field of clothes treatment, in particular to clothes treatment equipment, and aims at solving the problem that in the prior art, an electric device on an inner barrel of the clothes treatment equipment is poor in electrifying effect. To this end, the laundry treating apparatus according to the present invention comprises: an inner tub rotatably provided; the electric component is arranged to rotate along with the inner cylinder; the power supply component comprises a transmitting coil and a receiving coil, the transmitting coil is fixedly arranged, the receiving coil is installed on the inner cylinder, a wire of the transmitting coil is wound in a folded-back mode, and the receiving coil is electrically connected with the electric component. The conducting wire of the transmitting coil is wound in a turn-back mode, magnetic induction lines generated by the transmitting coil can be controlled in a specific area, namely, the magnetic induction lines can be concentrated instead of being dispersed towards the periphery, and therefore the arrangement area of the magnetic induction lines is controlled according to the shape and the rotation path of the receiving coil, and the electricity induction efficiency between the receiving coil and the transmitting coil is improved; and the electrifying effect of the power utilization device is further improved.