1427 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.

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

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.

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.

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.

A power transmitter (101) provides wireless power transfer to a power receiver (105) via a wireless inductive power transfer signal. The power transmitter (101) comprises transmitter coil (203) for generating the power transfer signal and a driver (201) generating a drive signal for this. A communicator (207) communicates with the power receiver (105) via a communication channel that does not use the power transfer signal as a communication carrier. A power loop controller (205) implements a power control loop by adapting a power level of the power transfer signal in response to power control error messages received from the power receiver (105). A generator (209) introduces a power level variation sequence to the power transfer signal and a validity detector (211) detects data received by the communicator (207) to be invalid data for the power transfer in response to a comparison of the power level variation sequence and power change requests of the power control error messages.

Operating a wireless power transfer system can include using wireless power transmitter control circuitry to: initiate a temporary pause of wireless power transfer; provide a stimulus signal to cause a resonant voltage in the wireless power transmitter coil during the temporary pause of wireless power transfer; use the resonant voltage to measure or characterize one or more parameters characterizing a wireless power transfer link, via the wireless power receiver coil, between the wireless power transmitter and the wireless power receiver; and thereafter resume wireless power transfer by ending the temporary pause of wireless power transfer.

The invention relates to the technical field of wireless charging, in particular to a self-adaptive wireless power transmission system and a receiver free positioning method thereof. The system is characterized in that a transmitting end comprises an inverter circuit, a transmitting end compensation network, a compensation network input detection circuit and an array transmitter, and the array transmitter comprises seven transmitting coils; the receiving end comprises a receiving coil, a receiving end compensation network and a load voltage detection circuit; the control system comprises a position prediction module and a fuzzy PID controller. The position prediction module is used for predicting the spatial position of the receiving coil by measuring a mutual inductance value between the transmitting coil and the receiving coil based on a neural network optimized by a seagull algorithm; and the fuzzy PID controller is used for acquiring the spatial position of the receiving coil, adjusting the excitation mode of the transmitting coil and the phase of an input signal of the inverter circuit, and optimizing the magnetic field distribution to compensate the offset influence. According to the invention, high transmission efficiency can still be maintained when the receiving coil deviates to a certain extent, and the anti-deviation capability is remarkably improved.

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.

The invention belongs to the field of geophysical geological exploration equipment, and relates to a pull-type transient electromagnetic gradient detection device and method based on a transmitting-receiving weak coupling structure, and the device comprises a transmitting coil which is used for generating excitation current; the receiving coil is used for receiving a secondary field signal and comprises a first receiving coil, a second receiving coil and a third receiving coil, and the size parameters of the first receiving coil and the second receiving coil are the same and are different from those of the third receiving coil; the first receiving coil and the second receiving coil are located on the same plane, have the same height from the plane where the transmitting coil is located, are eccentrically arranged relative to the transmitting coil and are symmetrical about the central axis of the transmitting coil; and the second receiving coil and the third receiving coil are coaxially arranged in parallel. According to the invention, environmental noise interference can be effectively suppressed, and the data signal-to-noise ratio is improved; and the effective data length is increased, and the detection depth is increased, so that non-blind area detection of the deep and shallow whole space is realized.

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 bearing assembly includes an outer ring connectable with a housing, the outer ring having an outer ring raceway and a transmitting coil axially spaced from the outer ring raceway. The transmitting coil can be electrically connected to a battery and is configured to generate an electromagnetic field when a current flows therethrough. The inner ring can be arranged around a rotating shaft of the rotor and is provided with an inner ring raceway and a receiving coil which is spaced from the inner ring raceway in the axial direction. And the receiving coil is close to the transmitting coil and is in induction connection with the transmitting coil, so that current is generated in the receiving coil when the current flows through the transmitting coil. The receiving coil is connected with an electromagnetic coil of the motor rotor, so that current flows to the electromagnetic coil from the receiving coil. A plurality of rolling bodies are disposed between the outer ring raceway and the inner ring raceway to rotatably connect the outer ring and the inner ring together.

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 present invention relates to wireless power transfer technology, and particularly to an IPT system with a highly integrated magnetic coupler and an IPT system integration method; in this method, three integrated coils and the design process of the integrated coils are proposed; among them, the integrated reverse transmitting coil is to achieve better anti-offset characteristics and high efficiency; the secondary-side integrated inductance coil aims to achieve zero-voltage switching condition configuration so that the output power and anti-offset characteristics are not affected; the primary-side integrated inductance coil aims to decouple from other coils and further improve the compactness without affecting the characteristics.

The invention discloses a dual-frequency compatible constant-current constant-voltage wireless charging system and a parameter tuning method thereof.The whole wireless charging system comprises a transmitting end and a receiving end, and the transmitting end comprises a direct-current voltage source Vdc, a high-frequency full-bridge inverter circuit, a primary side resonance compensation network and a transmitting coil Lp which are sequentially connected; and the receiving end comprises a receiving coil Ls, a secondary side resonance compensation network, a full-bridge rectification filter circuit and a direct-current load Ro which are connected in sequence. According to the invention, the hybrid compensation network is constructed in the system and parameter tuning is carried out on the hybrid compensation network, so that the resonant operation conditions of the system under two different frequencies can be met under the condition that inherent parameters of the system are not changed or complex control and additional devices are not used; on the basis, constant-current and constant-voltage hybrid wireless charging and input impedance zero-phase-angle operation can be achieved only through switching control over the two resonant frequencies, and the technical advantages of being high in efficiency, low in cost and easy to achieve are achieved.

In order to solve the technical problems that an existing wireless communication system based on magnetic coupling needs to be additionally provided with a foreign matter detection unit, so that the system is complex, the cost is high, the dynamic adjustment capability is lacked and the anti-interference performance is poor, the invention provides a wireless communication system and method with foreign matter detection and anti-interference functions. Impedance data of the transmitting coil module are used for foreign matter detection, detected foreign matter distribution information is coded into binary codes to be embedded into communication frames to be transmitted together with the communication frames, and data interaction delay among functional units is eliminated; the working mode switching module predicts the working mode of the wireless communication system at the next moment in real time based on the detected foreign matter distribution data, the actually measured energy efficiency ratio and the channel quality data, and triggers the current regulation and control unit to perform cooperative control on each coil unit of the transmitting coil module when the anti-interference mode needs to be started. And foreign matter detection and efficient information anti-interference transmission are synchronously realized.

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.

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 relates to a device (10) for inductive energy transmission into a human body (1), having a transmitter coil (24) and / or a receiver coil (14) having a first magnetic core (26) and a resonance or choke coil (16, 34) having a second magnetic core (32), wherein the first magnetic core (26) forms a part of the second magnetic core (32).

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.

Inductive power transfer across a rotary joint including a motor comprises a first portion with a magnetically permeable power transmit core with a power transmit coil and a second portion comprising a magnetically permeable power receive core with a power receive coil. The core material in the respective cores directs a time-varying electromagnetic field emitted by the power transmit coil toward the power receive coil where the field is contained. As a result, adjacent devices on a side opposite the coil that utilize magnetic fields, such as motor coils, may operate without interference. For example, a brushless direct current motor comprising a stator in the first portion and a rotor in the second portion may operate while power is transferred. Data may be wirelessly transmitted between the first portion and the second portion.

The invention discloses a passive wireless bolt axial force measuring method and equipment, the bolt axial force measuring equipment comprises a pulse transmitting unit, a transmitting end transmitting coil, a transmitting end receiving coil, an electric signal detection unit, a receiving end coil, a piezoelectric sensor and an ultrasonic probe, the pulse transmitting unit can generate an electric pulse signal with the pulse width of 100-0.01 us, and the receiving end coil can generate an electric pulse signal with the pulse width of 100-0.01 us; the electric pulse signal is received by the transmitting end transmitting coil to generate an induction pulse electromagnetic field, the induction pulse electromagnetic field is received by the receiving end coil to be transmitted to the piezoelectric sensor, the piezoelectric sensor generates ultrasonic waves, the ultrasonic waves act on the bolt and then are reflected, and the reflected ultrasonic signal outputs an electric signal through the piezoelectric sensor; after the electric signal detection unit receives the electric signal through the transmitting end receiving coil, the bolt axial force is calculated based on the ultrasonic propagation sound time when the ultrasonic propagation sound time is measured.