WO2020133102A1

WO2020133102A1 - Wireless power supply circuit, camera, wireless power supply method, and readable storage medium

Info

Publication number: WO2020133102A1
Application number: PCT/CN2018/124479
Authority: WO
Inventors: 黄睿
Original assignee: 深圳市大疆创新科技有限公司
Priority date: 2018-12-27
Filing date: 2018-12-27
Publication date: 2020-07-02
Also published as: CN111316534A

Abstract

The present invention provides a wireless power supply circuit, a camera, a wireless power supply method, and a readable storage medium. The wireless power supply circuit comprises: a control module used for controlling an output of a source power supply signal; a sending terminal module comprising a first wireless coupling unit and used for converting the source power supply signal to an alternating electromagnetic field signal; a receiving terminal module comprising a second wireless coupling unit and used for performing wireless coupling with the second wireless coupling unit by means of the first wireless coupling unit to convert the electromagnetic field signal to an induced electromotive force; and a detection module connected to the control module and used for detecting whether the second wireless coupling unit is in an electromagnetic field formed by the first wireless coupling unit, so that the control module determines whether to supply power according to an output result of the detection module. According to the technical solutions of the present invention, the present invention can replace the existing power supply method during contact of a contact, and the durability of a power supply module is prolonged while reducing the preparation costs.

Description

Wireless power supply circuit, camera, wireless power supply method and readable storage medium

Technical field

The invention relates to the field of wireless power supply, in particular to a wireless power supply circuit, a camera, a wireless power supply method, and a computer-readable storage medium.

Background technique

In the prior art, the camera lens is usually installed on the camera body through a snap system, and uses the form of contacts to realize power supply and control signal transmission. The current solution of the contact power supply has the following defects:

(1) Frequent disassembly and assembly of the camera lens will cause problems such as contact wear and contact card shells that cannot spring up, resulting in poor contact contact and affecting the reliability of power supply;

(2) Since the size of the buckle is very small, the requirements for the material of the contact and the processing technology are very high during preparation, which in turn leads to higher processing costs.

In order to prevent problems such as the inability of the contact to pop up due to the jamming or poor contact of the contact during use, the contact needs a very high processing technology during the processing;

It can be seen from the above that the contact contact power supply method in the prior art requires high manufacturing cost and does not have high durability.

Summary of the invention

Embodiments of the present invention provide a wireless power supply circuit, a camera, and a wireless power supply method to replace the existing contact power supply method when contacting, which reduces the manufacturing cost and extends the durability of the power supply module.

To achieve the above objective, a first aspect of the embodiments of the present invention provides a wireless power supply circuit, including:

Control module, used to control the output source power supply signal;

The sending-end module includes a first wireless coupling unit for converting the source power supply signal into an alternating electromagnetic field signal;

The receiving end module includes a second wireless coupling unit to wirelessly couple the electromagnetic field signal to the induced electromotive force through the first wireless coupling unit and the second wireless coupling unit;

The detection module, connected to the control module, is used to detect whether the second wireless coupling unit is in the electromagnetic field formed by the first wireless coupling unit, so that the control module determines whether to supply power according to the output result of the detection module.

The technical solution of the second aspect of the present invention provides a camera, including:

The camera body is provided with a first holding part;

The camera lens is provided with a second holding portion that cooperates with the first holding portion, wherein a first wireless coupling module is buried at a matching surface of the first holding portion, and at a matching surface of the second holding portion A second wireless coupling module is embedded to generate wireless coupling to power the camera lens through the first wireless coupling module and the second wireless coupling module.

The technical solution of the third aspect of the present invention provides a wireless power supply method, including:

According to the received output signal of the detection module, it is determined whether to output the power supply signal.

The technical solution of the fourth aspect of the present invention provides a computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a processor, the steps of the wireless power supply method as provided in the third aspect of the embodiments of the present invention are implemented .

In the wireless power supply circuit, the camera and the wireless power supply method provided by the embodiments of the present invention, the detection module for detecting the relative state between the sending end module and the receiving end module and the control module for controlling the power supply are detected. On the premise that the relative state between the sending end module and the receiving end module meets the specified requirements, the control module controls the transmission of electrical signals to the sending end module, so that the first wireless coupling unit on the sending end module and the first on the receiving end module Electromagnetic coupling occurs between the two wireless coupling units, so that the source power supply signal forms an alternating magnetic field under the action of the first wireless coupling unit, and the second wireless coupling unit in the alternating magnetic field can induce an induced electromotive force to convert the electromagnetic field signal It is converted into an inductive electrical signal to realize the power supply to the load of the receiving end module. By setting the wireless power supply circuit in this application, for the cameras in the prior art that supply power through contact contact, on the one hand, the frequency of the camera lens frequently The plug-in operation will not affect the wireless power supply performance, which is conducive to prolonging the service life of the camera. On the other hand, the assembly process of the electrical components of the wireless power supply circuit is more mature than the processing method of the contact. The cost will be lower, and because the fineness of the contact processing is not required, it can also reduce the difficulty of the operator's operation.

BRIEF DESCRIPTION

In order to more clearly explain the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required in the description of the embodiments. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without paying any creative labor, other drawings can also be obtained based on these drawings.

FIG. 1 shows a schematic architectural block diagram of a camera according to an embodiment of the invention;

2 shows a schematic circuit diagram of a detection module according to an embodiment of the invention;

3 shows a schematic diagram of a wireless power supply circuit according to an embodiment of the present invention;

4 shows a schematic diagram of a wireless power supply circuit according to another embodiment of the invention;

5 shows a schematic diagram of a wireless power supply circuit according to still another embodiment of the present invention;

6 shows a schematic diagram of a wireless power supply circuit according to yet another embodiment of the present invention;

7 shows a schematic diagram of a wireless power supply circuit according to another embodiment of the present invention;

FIG. 8 shows a schematic flowchart of a wireless power supply method according to an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be described clearly below with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present invention.

It should be noted that when a component is said to be "fixed" to another component, it can be directly on another component or there can also be a centered component. When a component is considered to be "connected" to another component, it can be directly connected to another component or there may be a centered component at the same time.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field of the present invention. The terminology used in the description of the present invention herein is for the purpose of describing specific embodiments, and is not intended to limit the present invention. The term "and/or" as used herein includes any and all combinations of one or more related listed items.

The following describes some embodiments of the present invention in detail with reference to the accompanying drawings. In the case of no conflict, the following embodiments and the features in the embodiments can be combined with each other.

An embodiment of the present invention provides a wireless power supply circuit. FIG. 1 is a schematic block diagram of a wireless power supply circuit provided by an embodiment of the present invention. The wireless power supply circuit described in this embodiment can be applied to a camera. As shown in FIG. 1, the power supply circuit in this embodiment may include:

The control module 10 is used to control the output source power supply signal;

Specifically, the wireless power supply circuit includes a power supply end (ie, an electrical signal sending end) and a receiving end (electrical signal receiving end), and the power supply control module 10 may be a control chip provided on the power supply end, for controlling the power supply to supply power to the output source of the sending end For the wireless power supply circuit, only when the cooperation between the power supply end and the receiver meets the specified requirements, the receiver can receive the wireless power supply signal transmitted by the sender, so it is necessary to set the power supply signal for controlling the output source The control module 10 of the device controls the output power supply signal after the power supply terminal and the receiving terminal are in a cooperative state, thereby preventing the waste of electric energy and causing the risk of leakage.

The sending-end module 20 includes a first wireless coupling unit for converting the source power supply signal into an alternating electromagnetic field signal;

The receiving end module 40 includes a second wireless coupling unit to convert the electromagnetic field signal into an induced electromotive force through wireless coupling between the first wireless coupling unit and the second wireless coupling unit;

Specifically, for the transmitter module as the power supply and the receiver module 40 as the receiver, a first wireless coupling unit is provided on the transmitter module, and a second wireless coupling unit is provided on the receiver module 40, so that After the terminal is in a cooperative state, electromagnetic coupling is generated between the first wireless coupling unit and the second wireless coupling unit to transmit the source power supply signal from the sending end module 20 to the receiving end module 40 by wireless transmission through electromagnetic conversion, and further Realize wireless power supply function.

The detection module 30 is connected to the control module 10 and used to detect whether the second wireless coupling unit is in the electromagnetic field formed by the first wireless coupling unit, so that the control module 10 determines whether to supply power according to the output result of the detection module 30.

Specifically, a detection module 30 electrically connected to the control module 10 is further provided to detect whether the cooperation between the power supply terminal and the receiving terminal meets the specified requirements. For example, for a camera that requires wireless power supply to a similar lens, the detection The function of the module 30 is to detect whether the camera lens has been installed on the camera body.

In the wireless power supply circuit provided by the embodiment of the present invention, by providing a detection module 30 for detecting the relative state between the sending end module 20 and the receiving end module 40, and a control module 10 for controlling the power supply, when the sending end is detected On the premise that the relative state between the module 20 and the receiver module 40 meets the specified requirements, the control module 10 controls the transmission of electrical signals to the transmitter module 20, so that the first wireless coupling unit on the transmitter module 20 and the receiver module Electromagnetic coupling occurs between the second wireless coupling unit on 40, so that the source power supply signal forms an alternating magnetic field under the action of the first wireless coupling unit, and the second wireless coupling unit in the alternating magnetic field can induce an induced electromotive force, In order to convert the electromagnetic field signal into an inductive electrical signal, so as to realize the power supply to the load element 50 of the receiving end module 40, by providing the wireless power supply circuit in this application, for the prior art equipment that supplies power through contact contact, one On the one hand, frequent insertion and removal operations between the power supply end and the receiving end will not affect the wireless power supply performance, which is beneficial to prolong the service life of the device. On the other hand, the assembly process of the electrical components of the wireless power supply circuit is relative to the processing of the contacts In terms of technology, while the maturity is higher, the processing cost will be lower, and because the fineness of the contact processing is not required, it can also reduce the difficulty of the operator's operation.

As shown in FIG. 2, optionally, the receiving end module 40 includes a metal package, and the detection module 30 includes: an LC oscillator, the LC oscillator includes an LC frequency selection network, and the LC frequency selection network includes a first resonant capacitor 302 and sensing Coil 304, wherein, in the case where the second wireless coupling unit is not in the electromagnetic field formed by the first wireless coupling unit, the LC frequency selection network has a high Q value, and the LC oscillator outputs an oscillating signal to the control module 10. When the coupling unit is in the electromagnetic field formed by the first wireless coupling unit, the metal package contacts the sensing coil 304 to generate eddy current, the LC frequency selection network has a low Q value, and the LC oscillator stops outputting the oscillation signal to the control module 10.

Specifically, the detection module 30 may include an LC oscillator including an LC frequency selection network constructed by an induction coil and a resonance capacitor. Specifically, an LC oscillator specifically includes an amplifier, a positive feedback circuit, and a frequency selection network. The amplifier can amplify the input signal at the oscillator input to keep the output signal at a constant oscillation signal, while the positive feedback circuit ensures that the feedback signal provided to the oscillator input has the same phase, and the frequency selection network is used to amplify the circuit A sinusoidal oscillation circuit is formed to output an oscillation signal. Correspondingly, a metal package capable of affecting the Q value of the LC frequency selection network (Q value is the quality factor of the loop) is provided at the receiving end. The LC oscillator can output the oscillation signal to the control module 10 In the case where the transmitter module and the receiver module 40 are not relatively assembled, the Q value of the frequency selection network is higher, and the LC oscillator can output an oscillation signal, while the transmitter module and the receiver module 40 are relatively assembled, because The influence of the metal package generates an eddy current, which causes the Q value of the frequency selection network to decrease, and the oscillation signal stops output. At this time, the control module 10 controls the power supply to output the power supply signal when it detects that the oscillation signal is no longer received. It is detected whether the detection module 30 has an oscillation signal output to determine whether it has the correct relative position.

Optionally, the LC oscillator includes a single oscillation circuit and a coupled oscillation circuit.

Regarding the circuit structure of the sending-end module 20, optionally, the sending-end module 20 further includes: a power amplifying circuit, electrically connected to the control module 10, for converting the source power supply signal into an alternating current to pass the first wireless The coupling unit converts the alternating current into an alternating electromagnetic field signal.

Specifically, a power amplifier circuit is provided to power-amplify the fixed-frequency source power supply signal transmitted by the control module 10 to obtain a high-power output signal, where the power amplifier circuit may be a bridge topology or a push-pull topology .

Optionally, as a specific real-time mode, when the power when the large circuit is a full-bridge topology amplifier circuit, the power amplifier circuit includes four semiconductor power elements, wherein one end of the first wireless coupling unit is electrically connected to the first semiconductor power Between the element and the second semiconductor power element, the other end of the first wireless coupling unit is electrically connected between the third semiconductor power element and the fourth semiconductor power element.

Optionally, the power amplifying circuit further includes a DC blocking capacitor, which is provided between the connection point of the third semiconductor power element and the fourth semiconductor power element and the other end of the first wireless coupling unit.

Optionally, as another specific real-time manner, when the power when the large circuit is a push-pull topology amplifying circuit, the push-pull topology amplifying circuit includes a symmetrically arranged fifth semiconductor power element and a sixth semiconductor power element, which are respectively provided in the first Both ends of a wireless coupling unit, wherein the fifth semiconductor power element and the sixth semiconductor power element input reverse square wave signals.

The first wireless coupling unit is provided with a center tap; the push-pull topology amplifying circuit further includes a resonant inductor and a second resonant capacitor, the resonant inductor is electrically connected to the center tap, and the second resonant capacitor is disposed on the fifth semiconductor power element and the sixth semiconductor power element between.

Optionally, the semiconductor power element is a triode or MOS tube.

For the circuit structure of the receiving end, optionally, the receiving end module 40 further includes: a rectifying and filtering circuit, electrically connected to the second wireless coupling unit, for converting the induced electromotive force into a DC voltage.

Specifically, by providing a rectifying and filtering circuit, the alternating induced electromotive force obtained by the second wireless coupling unit is converted into a smooth DC voltage.

Optionally, the rectification filter circuit includes: a common anode first diode and a second diode, and a common cathode third diode and a fourth diode, the cathode of the first diode is connected to the first The anode of the three diodes, the cathode of the second diode is connected to the anode of the fourth diode; one end of the second wireless coupling unit is electrically connected between the first diode and the third diode, the second The zero end of the wireless coupling unit is electrically connected between the second diode and the fourth diode.

Optionally, the rectifying and filtering circuit further includes: a filtering capacitor, one end of the filtering capacitor is connected between the first diode and the second diode, and the other end of the filtering capacitor is connected to the third diode and the fourth diode Between the tubes.

Optionally, the rectifying and filtering circuit further includes: a third resonance capacitor, one end of the third resonance capacitor is electrically connected to one end of the second wireless coupling unit, and the other end of the third resonance capacitor is electrically connected to the first diode and the third Between the diodes.

Optionally, the rectifying and filtering circuit further includes: a fourth resonance capacitor, one end of the fourth resonance capacitor is electrically connected to one end of the second wireless coupling unit, and the other end of the fourth resonance capacitor is electrically connected to the other end of the second wireless coupling unit .

Optionally, the receiving end module 40 further includes a switching power supply circuit, which is electrically connected to the rectifying and filtering circuit, and is used to stabilize the DC voltage to output a fixed voltage.

Specifically, through the switching power supply circuit, the DC voltage output from the rectifying and filtering circuit is regulated and converted into power to supply power to the load element 50 at the receiving end.

In view of the different combinations of the power discharge circuit and the rectifier filter circuit, and the different settings of the DC blocking capacitor and/or the second resonance capacitor, the wireless power transmission circuit has at least the following five real-time modes.

As shown in FIG. 3, for the transmitting-end module, the power amplifying circuit 204 includes: a full-bridge topology amplifying circuit formed by four semiconductor power elements, wherein one end of the first wireless coupling unit 202 is electrically connected to the first semiconductor power element 2042 and Between the second semiconductor power elements 2044, the other end of the first wireless coupling unit 202 is electrically connected between the third semiconductor power element 2046 and the fourth semiconductor power element 2048.

Optionally, the first semiconductor power element 2042 and the fourth semiconductor power element 2048 input a positive square wave signal, and the second semiconductor power element 2044 and the third semiconductor power element 2046 input a negative square wave signal.

The DC blocking capacitor 2050 is provided between the connection point of the third semiconductor power element 2046 and the fourth semiconductor power element 2048 and the other end of the first wireless coupling unit 202.

For the receiving-end module, the rectifying and filtering circuit 404 includes: a common anode first diode 4042 and a second diode 4044, and a common cathode third diode 4046 and a fourth diode 4048, the first two poles The cathode of the tube 4042 is connected to the anode of the third diode 4046, the cathode of the second diode 4044 is connected to the anode of the fourth diode 4048; one end of the second wireless coupling unit 402 is electrically connected to the first diode Between 4042 and the third diode 4046, the zero terminal of the second wireless coupling unit 402 is electrically connected between the second diode 4044 and the fourth diode 4048.

As shown in FIG. 4, for the transmitter module, the power amplifier circuit 204 includes: a full-bridge topology amplifier circuit formed by four semiconductor power elements, wherein one end of the first wireless coupling unit 202 is electrically connected to the first semiconductor power element 2042 and Between the second semiconductor power elements 2044, the other end of the first wireless coupling unit 202 is electrically connected between the third semiconductor power element 2046 and the fourth semiconductor power element 2048.

The rectifying and filtering circuit 404 further includes: a filtering capacitor 4050, one end of the filtering capacitor 4050 is connected between the first diode 4042 and the second diode 4044, and the other end of the filtering capacitor 4050 is connected to the third diode 4046 and the first Between four diodes 4048.

The rectifying and filtering circuit 404 further includes: a third resonance capacitor 40544052, one end of the third resonance capacitor 40544052 is electrically connected to one end of the second wireless coupling unit 402, and the other end of the third resonance capacitor 40544052 is electrically connected to the first diode 4042 and Between the third diode 4046.

As shown in FIG. 5, for the transmitter module, the power amplifier circuit 204 includes: a full-bridge topology amplifier circuit formed by four semiconductor power elements, wherein one end of the first wireless coupling unit 202 is electrically connected to the first semiconductor power element 2042 and Between the second semiconductor power elements 2044, the other end of the first wireless coupling unit 202 is electrically connected between the third semiconductor power element 2046 and the fourth semiconductor power element 2048.

The rectifying and filtering circuit 404 further includes a fourth resonance capacitor, one end of the fourth resonance capacitor is electrically connected to one end of the second wireless coupling unit 402, and the other end of the fourth resonance capacitor is electrically connected to the other end of the second wireless coupling unit 402.

As shown in FIG. 6, for the transmitting-end module, the power amplifying circuit 204 includes: a symmetrically arranged fifth semiconductor power element 2052 and sixth semiconductor power element 2054, which are respectively disposed at both ends of the first wireless coupling unit 202, wherein The fifth semiconductor power element 2052 and the sixth semiconductor power element 2054 input reverse square wave signals.

The first wireless coupling unit 202 is provided with a center tap; the push-pull topology amplifying circuit further includes a resonant inductor 2056 and a second resonant capacitor 2058, the resonant inductor 2056 is electrically connected to the center tap, and the second resonant capacitor 2058 is disposed on the fifth semiconductor power element 2052 With the sixth semiconductor power element 2054.

As shown in FIG. 7, for the transmitting-end module, the power amplifying circuit 204 includes: a symmetrically arranged fifth semiconductor power element 2052 and sixth semiconductor power element 2054, which are respectively disposed at both ends of the first wireless coupling unit 202, wherein The fifth semiconductor power element 2052 and the sixth semiconductor power element 2054 input reverse square wave signals.

Optionally, the first wireless coupling unit 202 includes: a first induction coil; the second wireless coupling unit 402 includes: a second induction coil.

Optionally, the first wireless coupling unit 202 further includes: a first ferrite magnetic strip, which is provided in cooperation with the first induction coil; the second wireless coupling unit 402 further includes: a second ferrite magnetic strip, and the second induction Coil set.

Specifically, the arrangement of the ferrite magnetic strip is used to improve the coupling between the first induction coil and the second induction coil.

As shown in FIG. 1, an embodiment of the present invention further provides a camera, including a camera body and a camera lens, wherein the camera body includes the control module, the sending end module, and the detection module in the wireless power supply circuit of any of the foregoing embodiments, the camera The lens includes the receiving end module in the wireless power supply circuit of any of the above embodiments, wherein a first wireless coupling module and a second wireless coupling module are respectively provided in the matching area of the camera body and the camera lens to pass the first wireless coupling The module and the second wireless coupling module generate wireless coupling to supply power to the camera lens.

Specifically, the camera includes a camera body and a camera lens that can be assembled on the camera body.

The camera body is provided with the above-mentioned transmitter module, a control module electrically connected to the transmitter module, and a detection module electrically connected to the control module, wherein the transmitter module includes a power amplifier circuit and a first wireless coupling module, the power The amplifier circuit is realized by a bridge topology or a push-pull topology. The signal of a certain frequency sent by the control module is amplified by the power amplifier circuit to excite the first wireless coupling module, the first wireless coupling module and the second wireless coupling module Both can be composed of a coil (implemented by enameled wire or PCB, FPC) and a magnetic stripe (increasing magnetic permeability and improving coupling). The first wireless coupling module converts the alternating current output by the power amplifier circuit into an alternating magnetic field.

The camera lens is provided with the above-mentioned receiving end module. The receiving end module includes a second wireless coupling module, a rectifying filter circuit and a switching power supply circuit circuit. The second wireless coupling module is used to convert the alternating magnetic field excited by the transmitting end into an alternating current The variable voltage, the rectifier filter circuit realizes the conversion of the alternating voltage output by the second wireless coupling module into a smooth DC voltage; the power switch circuit realizes the regulation and voltage conversion of the DC voltage output by the rectifier filter circuit, which is used to Various other components in the camera lens supply power.

In the camera provided by the embodiment of the present invention, by providing a detection module for detecting the relative state between the sending end module and the receiving end module, and a control module for controlling the power supply, when the sending end module and the receiving end module are detected On the premise that the relative state between the two meets the specified requirements, the control module controls the transmission of electrical signals to the sending-end module, so that electromagnetic waves are generated between the first wireless coupling unit on the sending-end module and the second wireless coupling unit on the receiving-end module Coupling, so that the source power supply signal forms an alternating magnetic field under the action of the first wireless coupling unit, and the second wireless coupling unit in the alternating magnetic field can induce an induced electromotive force to convert the electromagnetic field signal into an induced electrical signal, thereby achieving For the power supply to the load of the receiving end module, by setting the wireless power supply circuit in this application, for the camera in the prior art to supply power through contact contact, on the one hand, the frequent insertion and removal of the camera lens will not affect the wireless power supply Performance, which is conducive to extending the life of the camera. On the other hand, the assembly process of the electrical components of the wireless power supply circuit is more mature than the processing technology of the contact, and the processing cost will be lower. The fineness of the contact processing is required, so it can also reduce the operator's difficulty in operation.

Optionally, the camera body is provided with a first holding portion; the camera lens is provided with a second holding portion that cooperates with the first holding portion, wherein the first surface is embedded at the mating surface of the first holding portion In the wireless coupling module, a second wireless coupling module is embedded at the mating surface of the second clamping portion.

Specifically, the detection module is specifically a buckle state detection circuit. The buckle state detection circuit is used to detect whether a camera lens is mounted on the camera body to prevent the alternating coupling excited by the wireless coupling module when the camera lens is not installed The magnetic field leaks into the space, causing electromagnetic interference and unnecessary power consumption.

The circuit diagram of the snapping state detection circuit is shown in Figure 2. When the camera lens is mounted on the camera body, the sensing coil contacts the metal lens. Due to the influence of eddy current, the Q value of the frequency selection network drops greatly, causing the oscillation signal to stop Output, to detect whether the camera lens is mounted on the camera body by detecting whether the oscillator outputs a signal.

Optionally, the first holding portion is also provided with a sensing coil in the detection module; the second holding portion is provided with a metal area capable of contacting with the sensing coil, wherein, when the camera body is separated from the camera lens, The clamping state detection module outputs an oscillating signal. When the camera lens is mounted on the camera body through the cooperation of the first clamping part and the second clamping part, the sensing coil contacts the metal area to generate an eddy current. The clamping state detection module Stop outputting oscillation signal.

Optionally, the first wireless coupling module includes a first wireless power transmission coil and a first high permeability magnetic stripe; the second wireless coupling module includes a second wireless power transmission coil and a second high permeability magnetic stripe.

Optionally, it further includes: a DC power supply, which is installed in the camera body and connected to the control module to control the power supply by the control module.

As shown in FIG. 8, an embodiment of the present invention also provides a wireless power supply method, including:

S802, determining whether to output the source power supply signal to the sending end module according to the acquired detection signal of the detection module, so as to generate wireless coupling between the sending end module and the receiving end module after determining to output the source power supply signal to the sending end module, The receiver module receives the wireless power supply signal.

Specifically, for the camera, when performing wireless power supply operation, the main control process is to detect whether the camera lens is mounted on the camera body, in order to control the wireless power supply to be turned on when it is detected that the camera lens is mounted on the camera body, Among them, in the actual application process, the sensing coil is set in the detection module. When the sensing coil contacts the metal lens, due to the influence of eddy current, the Q value of the frequency selection network drops greatly, causing the oscillation signal to stop output to pass Detect whether the oscillator outputs a signal to detect whether the camera lens is mounted on the camera body.

Optionally, determine whether to output the source power supply signal to the sending-end module according to the acquired detection signal of the detection module, which specifically includes: the detection module includes an LC oscillator and an LC frequency selection network provided outside the LC oscillator. The frequency network has a high Q value, and when the oscillation signal output by the LC oscillator is received, the control stops outputting the power supply signal; when the LC frequency selection network has a low Q value, and the oscillation signal output by the LC oscillator is not received, the output power supply is controlled signal.

Optionally, the power supply signal is converted into an alternating electromagnetic field signal by the first wireless coupling unit, and the first wireless coupling unit and the second wireless coupling unit are wirelessly coupled to convert the electromagnetic field signal into an induced electromotive force to achieve wireless power supply.

An embodiment of the present invention provides a computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a processor, the steps of the wireless power supply circuit in the above embodiment are implemented.

Further, it can be understood that any process or method description in the flowchart or otherwise described herein can be understood as representing executable instructions including one or more steps for implementing a specific logical function or process Modules, fragments, or parts of the code, and the scope of the preferred embodiment of the present invention includes additional implementations, which may not be in the order shown or discussed, including in a substantially simultaneous manner or in the reverse order according to the functions involved The order to execute the functions should be understood by those skilled in the art to which the embodiments of the present invention belong.

The logic and/or steps represented in the flowchart or otherwise described herein, for example, can be regarded as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium, For use by or in combination with instruction execution systems, devices or equipment (such as computer-based systems, systems including processors, or other systems that can fetch and execute instructions from instruction execution systems, devices or equipment) Or equipment. For the purposes of this specification, a "computer-readable medium" may be any device that can contain, store, communicate, propagate, or transmit a program for use by or in connection with an instruction execution system, apparatus, or device. More specific examples of computer-readable media (non-exhaustive list) include the following: electrical connections (electronic devices) with one or more wires, portable computer cartridges (magnetic devices), random access memory (RAM), Read only memory (ROM), erasable and editable read only memory (EPROM or flash memory), fiber optic devices, and portable compact disk read only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program can be printed, because, for example, by optically scanning the paper or other medium, followed by editing, interpretation, or other suitable means if necessary Process to obtain the program electronically and then store it in computer memory.

It should be understood that each part of the present invention may be implemented by hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: a logic gate circuit for implementing a logic function on a data signal Discrete logic circuits, dedicated integrated circuits with appropriate combinational logic gates, programmable gate arrays (PGA), field programmable gate arrays (FPGA), etc.

A person of ordinary skill in the art can understand that all or part of the steps carried in the method of the above embodiments can be completed by instructing relevant hardware through a program. The program can be stored in a computer-readable storage medium, and when the program is executed , Including one of the steps of the method embodiment or a combination thereof.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The above integrated modules can be implemented in the form of hardware or software function modules. If the integrated module is implemented in the form of a software function module and sold or used as an independent product, it can also be stored in a computer-readable storage medium.

The storage medium mentioned above may be a read-only memory, a magnetic disk or an optical disk.

The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

A wireless power supply circuit is characterized by comprising:

The control module is used to control the power supply signal of the output source;

The sending-end module includes a first wireless coupling unit for converting the source power supply signal into an alternating electromagnetic field signal;

The receiving end module includes a second wireless coupling unit to wirelessly couple the electromagnetic field signal to an induced electromotive force through the first wireless coupling unit and the second wireless coupling unit;

A detection module, connected to the control module, for detecting whether the second wireless coupling unit is in the electromagnetic field formed by the first wireless coupling unit, so that the control module determines whether it is based on the output result of the detection module powered by.
The wireless power supply circuit according to claim 1, wherein:

The receiving end module includes a metal package,

The detection module includes: an LC oscillator, the LC oscillator includes an LC frequency selection network, and the LC frequency selection network includes a first resonance capacitor and a sensing coil,

Wherein, when the second wireless coupling unit is not in the electromagnetic field formed by the first wireless coupling unit, the LC oscillator outputs an oscillation signal to the control module, and the second wireless coupling unit is In the case of the electromagnetic field formed by the first wireless coupling unit, the metal package comes into contact with the sensing coil to generate an eddy current, and the LC oscillator stops outputting an oscillation signal to the control module.
The wireless power supply circuit according to claim 2, wherein:

The LC oscillator includes a single oscillation circuit and a coupled oscillation circuit.
The wireless power supply circuit according to any one of claims 1 to 3, wherein the sending-end module further comprises:

A power amplifier circuit, electrically connected to the control module, is configured to convert the source power supply signal into an alternating current to convert the alternating current into the alternating electromagnetic field signal through the first wireless coupling unit.
The wireless power supply circuit according to any one of claims 1 to 4, wherein the receiving end module further includes:

The rectifying and filtering circuit is electrically connected to the second wireless coupling unit and used for converting the induced electromotive force into a direct current voltage.
The wireless power supply circuit according to claim 5, wherein the receiving end module further comprises:

The switching power supply circuit is electrically connected to the rectifying and filtering circuit and is used to stabilize the DC voltage to output a fixed voltage.
The wireless power supply circuit according to claim 4, wherein the power amplifier circuit is a full-bridge topology amplifier circuit composed of four semiconductor power elements, wherein one end of the first wireless coupling unit is electrically connected to the first Between a semiconductor power element and a second semiconductor power element, the other end of the first wireless coupling unit is electrically connected between the third semiconductor power element and the fourth semiconductor power element.
The wireless power supply circuit according to claim 7, wherein:

A positive square wave signal is input to the first semiconductor power element and the fourth semiconductor power element, and a negative square wave signal is input to the second semiconductor power element and the third semiconductor power element.
The wireless power supply circuit according to claim 7, wherein the power amplifier circuit further comprises:

The DC blocking capacitor is provided between the connection point of the third semiconductor power element and the fourth semiconductor power element and the other end of the first wireless coupling unit.
The wireless power supply circuit according to claim 4, wherein the power amplifying circuit is a push-pull topology amplifying circuit.
The wireless power supply circuit according to claim 10, wherein the push-pull topology amplifying circuit includes a symmetrically arranged fifth semiconductor power element and a sixth semiconductor power element, which are respectively disposed on two sides of the first wireless coupling unit end,

Wherein, the fifth semiconductor power element and the sixth semiconductor power element input reverse square wave signals.
The wireless power supply circuit according to claim 11, wherein:

The first wireless coupling unit is provided with a center tap;

The push-pull topology amplifying circuit further includes a resonant inductor and a second resonant capacitor, the resonant inductor is electrically connected to the center tap, and the second resonant capacitor is disposed between the fifth semiconductor power element and the sixth semiconductor power element between.
The wireless power supply circuit according to any one of claims 7 to 9 and 11 and 12, wherein the semiconductor power element is a triode or a MOS tube.
The wireless power supply circuit according to claim 5, wherein the rectifying and filtering circuit comprises:

A common anode first diode and a second diode, and a common cathode third diode and a fourth diode, the cathode of the first diode is connected to the third diode An anode, the cathode of the second diode is connected to the anode of the fourth diode;

One end of the second wireless coupling unit is electrically connected between the first diode and the third diode, and a zero end of the second wireless coupling unit is electrically connected to the second diode Between the tube and the fourth diode.
The wireless power supply circuit according to claim 14, wherein the rectifying and filtering circuit further comprises:

A filter capacitor, one end of the filter capacitor is connected between the first diode and the second diode, and the other end of the filter capacitor is connected to the third diode and the fourth diode Between the diodes.
The wireless power supply circuit according to claim 15, wherein the rectifying and filtering circuit further comprises:

A third resonance capacitor, one end of the third resonance capacitor is electrically connected to one end of the second wireless coupling unit, and the other end of the third resonance capacitor is electrically connected to the first diode and the third Between the diodes.
The wireless power supply circuit according to claim 16, wherein the rectifying and filtering circuit further comprises:

A fourth resonance capacitor, one end of the fourth resonance capacitor is electrically connected to one end of the second wireless coupling unit, and the other end of the fourth resonance capacitor is electrically connected to the other end of the second wireless coupling unit.
The wireless power supply circuit according to any one of claims 1 to 17, wherein:

The first wireless coupling unit includes: a first induction coil;

The second wireless coupling unit includes: a second induction coil.
The wireless power supply circuit according to claim 18, wherein:

The first wireless coupling unit further includes: a first ferrite magnetic strip, which is provided in cooperation with the first induction coil;

The second wireless coupling unit further includes: a second ferrite magnetic strip, which is provided in cooperation with the second induction coil.
A camera, characterized in that it includes:

The camera body includes the control module, the sending end module and the selection module in the wireless power supply circuit according to any one of claims 1 to 19;

A camera lens, including the receiver module in the wireless power supply circuit according to any one of claims 1 to 19,

Wherein, a first wireless coupling module and a second wireless coupling module are respectively arranged in the matching area of the camera body and the camera lens to pass the first wireless coupling module and the second wireless coupling module A wireless coupling is generated to power the camera lens.
The camera according to claim 20, characterized in that

The camera body is provided with a first holding portion;

The camera lens is provided with a second holding portion that cooperates with the first holding portion, wherein the first wireless coupling module is embedded at the mating surface of the first holding portion The second wireless coupling module is embedded at the mating surface of the second clamping portion.
The camera according to claim 21, wherein

The sensing coil in the detection module is further provided on the first holding portion;

The second holding portion is provided with a metal area in contact with the sensing coil,

Wherein, when the camera body and the camera lens are separated, the clamping state detection module outputs an oscillation signal, and the camera lens is coordinated by the first clamping part and the second clamping part When installed on the camera body, the sensing coil contacts the metal area to generate an eddy current, and the holding state detection module stops outputting an oscillation signal.
The camera according to any one of claims 20 to 22, wherein

The first wireless coupling module includes a first wireless power transmission coil and a first high permeability magnetic strip;

The second wireless coupling module includes a second wireless power transmission coil and a second high permeability magnetic strip.
The camera according to any one of claims 20 to 23, further comprising:

A DC power supply is installed in the camera body and connected to the control module to control power supply by the control module.
A wireless power supply method, applicable to the camera according to any one of claims 20 to 24, characterized in that it includes:

According to the acquired detection signal of the detection module, determine whether to output the source power supply signal to the sending end module, so that after determining to output the source power supply signal to the sending end module, a wireless coupling is generated between the sending end module and the receiving end module, so that all The receiving end module receives the wireless power supply signal.
The wireless power supply method according to claim 25, wherein the determining whether to output the source power supply signal to the sending-end module according to the acquired detection signal of the detection module specifically includes:

The detection module includes an LC oscillator and an LC frequency selection network provided outside the LC oscillator. When the LC frequency selection network has a high Q value and the oscillation signal output by the LC oscillator is received, control stops Output the power supply signal;

When the LC frequency selection network has a low Q value and the oscillation signal output by the LC oscillator is not received, the power supply signal is controlled to be output.
The wireless power supply method according to claim 25 or 26, wherein

The power supply signal is converted into an alternating electromagnetic field signal by the first wireless coupling unit, and the first wireless coupling unit and the second wireless coupling unit are wirelessly coupled to convert the electromagnetic field signal into an induced electromotive force to realize wireless power supply .
A computer-readable storage medium on which a computer program is stored, characterized in that when the computer program is executed by a processor, the steps of the wireless power supply method according to any one of claims 25 to 27 are implemented.