Adaptive pulse laser wireless energy transmission system, method and electronic equipment

Abstract

The present application provides an adaptive pulse laser wireless energy transmission system, method and electronic device, which relate to the field of wireless energy transmission technology. The system comprises: a transmitting end, a receiving end and a feedback control end; the transmitting end generates a pulse laser based on preset control parameters, transmits a part of the pulse laser to a controller, and transmits another part of the pulse laser to the receiving end; the receiving end receives the other part of the pulse laser, and converts the optical energy of the pulse laser into electrical energy; tracks the maximum power, and converts the electrical energy using a power management device at the receiving end; the feedback control end cross-perturbs the preset control parameters based on the optical power and maximum power of a part of the transmitted pulse laser, and feeds back the cross-perturbation control signal to the pulse laser generation module. After receiving the feedback signal, the pulse laser generation module can be adjusted to the optimal pulse laser frequency and duty cycle, thereby realizing high conversion efficiency laser wireless energy transmission.

Description

Technical Field

[0001] The present application relates to the technical field of wireless energy transmission, and in particular to an adaptive pulsed laser wireless energy transmission system, method and electronic equipment. Background Art

[0002] Wireless energy transmission has been a hot topic in recent years. Currently, common methods include microwave energy transmission, electromagnetic induction energy transmission, magnetic coupling energy transmission and laser energy transmission. Laser wireless power transmission (LWPT) has the advantages of good directionality, high energy density, and long transmission distance. It can also provide non-contact continuous power supply to power supply equipment in extreme environments, so it has been widely used. The transmitting laser of the existing laser wireless energy transmission system uses a continuous laser. During the wireless energy transmission process, the laser battery array continuously receives laser energy, resulting in excessive heat accumulation in the laser battery array and low optical power density, which makes the laser battery photoelectric conversion efficiency low.

[0003] At present, the improvement plan to solve the problem of heat accumulation is generally to install a heat dissipation device behind the photovoltaic cell, such as a heat dissipation fin, a heat pipe, and a microchannel. Although this solution can achieve a certain heat dissipation effect, it increases the size and weight of the receiving device. For active heat dissipation devices, it also consumes additional energy, which has a great impact on the overall efficiency of the laser energy transmission system and is not conducive to the practical application of the laser energy transmission system. There is currently no relevant feasible solution to how to control the heat accumulation of photovoltaic cells within a reasonable range without causing other adverse effects on the receiving device. Summary of the invention

[0004] In view of this, the purpose of the embodiments of the present application is to provide an adaptive pulsed laser wireless energy transmission system, method and electronic device, by setting a branch transmission module at the transmitting end, a part of the pulsed laser is transmitted to the receiving end for photoelectric conversion and maximum power tracking, and the other part is used to measure the real-time optical power and transmitted to the controller of the feedback control end. Combined with the maximum power tracked by the receiving end, it is fed back to the pulse laser generation module at the transmitting end after cross-disturbance, which is used for the emission control of the pulsed laser required for the photoelectric conversion work at the receiving end; it effectively solves the problem of excessive heat accumulation and reduced conversion efficiency of the photovoltaic cell array under high-power laser irradiation, and at the same time adds a controller at the feedback control end, and realizes high conversion efficiency laser wireless energy transmission by real-time feedback of the pulse duty cycle and frequency of the pulsed laser at the receiving end, thereby solving the above technical problems.

[0005] In a first aspect, an embodiment of the present application provides an adaptive pulse laser wireless energy transmission system, the system comprising: a transmitting end, a receiving end and a feedback control end;

[0006] The transmitting end includes: a pulse laser generating module and a branch transmission module; the receiving end includes: a photoelectric conversion module and an energy storage conversion module; the feedback control end includes: a controller;

[0007] The pulse laser generating module is used to generate pulse laser based on preset control parameters and transmit the pulse laser to the branch transmission module; the branch transmission module is used to transmit a part of the pulse laser to the controller and transmit another part of the pulse laser to the photoelectric conversion module;

[0008] The photoelectric conversion module is used to receive another part of the pulse laser emitted by the branch transmission module and convert the light energy of the pulse laser into electrical energy; the energy storage conversion module is used to track the maximum power of the photoelectric conversion module and convert the electrical energy based on the maximum power;

[0009] The controller is used to: based on the optical power of a part of the pulsed laser transmitted by the branch transmission module and the maximum power, cross-disturb the preset control parameters, and feed back the cross-disturbed control signal to the pulsed laser generating module.

[0010] In the above implementation process, a branch transmission module is set at the transmitting end, and a part of the pulse laser is transmitted to the receiving end for photoelectric conversion and maximum power tracking. The other part is used to measure the real-time optical power and transmitted to the controller at the feedback control end. Combined with the maximum power tracked by the receiving end, it is fed back to the pulse laser generation module at the transmitting end after cross-disturbance. After receiving the feedback signal, the pulse laser generation module can be adjusted to the optimal pulse laser frequency and duty cycle, and realize the emission control of the pulse laser required for the photoelectric conversion work at the receiving end; it effectively solves the problem of excessive heat accumulation and reduced conversion efficiency of the photovoltaic cell array under high-power laser irradiation, and at the same time, adds a controller at the feedback control end, and realizes high-conversion-efficiency laser wireless energy transmission by real-time feedback of the control parameters of the pulse laser at the receiving end.

[0011] Optionally, the pulse laser generating module comprises: a pulse control system and a pulse laser;

[0012] The pulse control system is used to: receive the control signal fed back by the controller, and convert the control signal into a pulse modulated current signal; wherein the control signal includes: a preset pulse frequency signal and a preset pulse duty cycle signal;

[0013] The pulse laser is used to generate pulse laser based on the pulse modulated current signal.

[0014] In the above implementation process, by setting up a pulse control system and a pulse laser to form a pulse generation module, the dynamic feedback information of the feedback control end can be received in real time to control the emission of the excitation pulse.

[0015] Optionally, the branch transmission module includes: a spectroscope, an optical power meter and a tracking and aiming device;

[0016] The beam splitter is used to: reflect a part of the pulse laser to the optical power meter according to a preset splitting ratio, and transmit another part of the pulse laser to the tracking and aiming device;

[0017] The optical power meter is used to: measure the optical power of a portion of the pulsed laser reflected by the beam splitter;

[0018] The tracking and aiming device is used to track another part of the pulse laser transmitted by the beam splitter and emit it to the photoelectric conversion module.

[0019] In the above implementation process, a splitter, an optical power meter and a tracking and aiming device are provided to form a branch transmission module, so as to ensure the accuracy of optical power measurement while keeping the optical path as simple as possible.

[0020] Optionally, the energy storage conversion module includes: a power management device and a power consumption module;

[0021] The power management device includes: a voltage and current acquisition circuit, an MPPT controller, a pulse width modulation circuit and a boost circuit; the power consumption module includes: a load circuit;

[0022] The voltage and current acquisition circuit is used to: acquire the output voltage and output current of the photoelectric conversion module in real time;

[0023] The MPPT controller is used to: track the maximum power point of the photoelectric conversion module based on the output voltage and the output current;

[0024] The pulse width modulation circuit is used to: output a pulse width modulation signal based on the maximum power point;

[0025] The boost circuit is used to: perform modulation based on the pulse width modulation signal and feed back to the photoelectric conversion module;

[0026] The load circuit is used to: supply power to a load or charge a battery based on the maximum power point.

[0027] In the above implementation process, by setting up a voltage and current acquisition circuit, an MPPT controller, a pulse width modulation circuit and a boost circuit to form a power management device, the maximum power tracking of the photovoltaic array and the management of the output energy are achieved.

[0028] Optionally, the preset control parameters include: pulse frequency and pulse duty cycle; the controller is further used for:

[0029] Calculating a first photoelectric conversion efficiency based on the currently collected light power and the maximum power;

[0030] Cross-perturbing the pulse frequency and pulse duty cycle, and feeding back the cross-perturbed pulse frequency signal and pulse duty cycle signal to the transmitting end;

[0031] Recollecting the optical power of the pulsed laser generated by the transmitting end and the maximum power tracked by the receiving end, and calculating a second photoelectric conversion efficiency based on the optical power and the maximum power;

[0032] A maximum photoelectric conversion efficiency is determined according to the first photoelectric conversion efficiency and the second photoelectric conversion efficiency.

[0033] In the above implementation process, the pulse frequency and duty cycle are cross-perturbed based on an improved optimization algorithm to obtain the maximum photoelectric conversion efficiency of the laser cell array output, which can control the thermal accumulation of the photocell within a reasonable range, thereby reducing the impact of excessive thermal accumulation on the conversion efficiency of the photocell and improving the conversion efficiency of the entire system within a certain period of time.

[0034] Optionally, the controller is further configured to:

[0035] Repeatedly collecting the optical power of the pulsed laser generated by the transmitting end and the maximum power tracked by the receiving end, and calculating multiple photoelectric conversion efficiencies based on the optical power and the maximum power;

[0036] Based on the plurality of photoelectric conversion efficiencies, a maximum photoelectric conversion efficiency is determined.

[0037] In the above implementation process, the pulse frequency and duty cycle are cross-perturbed multiple times based on the improved optimization algorithm to find the maximum photoelectric conversion efficiency of the laser cell array output, which can control the thermal accumulation of the photocell within a reasonable range and improve the conversion efficiency of the entire system.

[0038] Optionally, the photoelectric conversion module comprises: a photoelectric cell array consisting of a plurality of photoelectric cells connected in series and parallel.

[0039] In the above implementation process, the light receiving area can be increased, damage caused by non-uniform illumination can be avoided, and the working efficiency and life of the photocell can be improved.

[0040] In the second aspect, an embodiment of the present application provides an adaptive pulsed laser wireless energy transmission method, which is applied to any of the above-mentioned adaptive laser energy transmission systems; the method includes: generating a pulsed laser based on preset control parameters, and branching the pulsed laser for transmission; performing photoelectric conversion based on a part of the pulsed laser transmitted through the branch; cross-disturbing the preset control parameters based on the optical power measured for another part of the pulsed laser transmitted by the branch transmission module and the maximum power of the photoelectric conversion work, and performing feedback control based on the preset control parameters after the cross-disturbing.

[0041] In a third aspect, an embodiment of the present application further provides an electronic device, comprising: a processor and a memory, wherein the memory stores machine-readable instructions executable by the processor, and when the electronic device is running, the machine-readable instructions are executed by the processor to perform the steps of the above method.

[0042] In a fourth aspect, an embodiment of the present application provides a storage medium having a computer program stored thereon, and the computer program executes the steps of the above method when executed by a processor.

[0043] In order to make the above-mentioned objects, features and advantages of the present application more obvious and understandable, embodiments are given below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0045] Figure 1 A block diagram of an adaptive pulsed laser wireless energy transmission system provided in an embodiment of the present application;

[0046] Figure 2 A schematic diagram of an adaptive pulsed laser wireless energy transmission system provided in an embodiment of the present application;

[0047] Figure 3 A schematic diagram of a power management device provided in an embodiment of the present application;

[0048] Figure 4 A flow chart of cross perturbation provided in an embodiment of the present application;

[0049] Figure 5 A flow chart of an adaptive pulsed laser wireless energy transmission method provided in an embodiment of the present application;

[0050] Figure 6 A block diagram of an electronic device is provided for an embodiment of the present application.

[0051] Icon: 210 - pulse laser generating module; 220 - branch transmission module; 230 - photoelectric conversion module; 240 - energy storage conversion module; 250 - controller; 300 - electronic device; 311 - memory; 312 - storage controller; 313 - processor; 314 - peripheral interface; 315 - input and output unit; 316 - display unit. DETAILED DESCRIPTION

[0052] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0053] It should be noted that similar numbers and letters represent similar items in the following figures, so once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. The terms "comprises", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of further restrictions, the elements defined by the statement "comprising one..." do not exclude the presence of other identical elements in the process, method, article or equipment including the elements. The terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0054] Before introducing the embodiments of the present application, a brief introduction to the technical concepts involved in the present application is first given.

[0055] Laser wireless energy transmission: Instead of using energy transmission lines, lasers are used as energy transmission carriers, and their excellent directionality and high power density are used to provide energy to the target device to enable it to work normally. It is mainly composed of a laser emission system, an energy transmission control system, a laser receiving system, an energy management system, and a load. It has potential application prospects in space vehicles, UAV power supply, and space solar power stations. Unevenly distributed laser irradiation will cause serious energy loss at the receiving end of the wireless laser energy transmission system. Experimental measurements show that the energy loss can be as high as 78%, which greatly limits the practical application of laser wireless energy transmission technology. Uneven Gaussian distributed incident lasers will reduce the photoelectric conversion efficiency of the battery array in the receiving system, and it is necessary to study the relationship between uniformity and circuit efficiency.

[0056] Adaptive pulsed laser wireless energy transmission system: An advanced wireless energy transmission system that uses laser as the transmission medium and achieves efficient energy transmission through adaptive control technology. This technology can automatically adjust the transmission parameters according to environmental changes to ensure stable energy transmission. It can also automatically adjust the transmission power according to the needs of the receiving end to meet the needs of different devices. The structural components of the adaptive pulsed laser wireless energy transmission system generally include: (1) Transmitter (transmitter): responsible for converting electrical energy into laser and transmitting it to the receiver (receiver) through free space. (2) Receiver (receiver): responsible for receiving and converting laser energy, converting it into electrical energy, and then powering the electrical equipment. (3) Adaptive controller: The core of the system, it is responsible for dynamically adjusting the parameters of the transmitter, such as pulse frequency, pulse width, beam aiming, etc., according to environmental conditions and feedback from the receiving end to achieve efficient energy transmission. (4) Feedback system: used to obtain information about the energy reception status from the receiving end, and then pass this information to the adaptive controller to help it make appropriate adjustments. (5) Power supply and energy storage device: After receiving the laser and converting it into electrical energy, these devices are responsible for storing excess energy and releasing it when needed. (6) Protection system: including overheat protection, overvoltage protection, etc., used to protect the safety of the system when abnormalities occur in the system.

[0057] The inventor of the present application has noticed that wireless energy transmission has been a hot topic in recent years. Currently, common methods include microwave energy transmission, electromagnetic induction energy transmission, magnetic coupling energy transmission and laser energy transmission. Among them, the laser energy transmission system has the advantages of long transmission distance, good directivity, high conversion efficiency and small size. The transmitting end laser of the existing laser wireless energy transmission system adopts a continuous laser. During the wireless energy transmission process, the laser battery array continuously receives laser energy, resulting in excessive heat accumulation of the laser battery array and low optical power density, which makes the laser battery photoelectric conversion efficiency low. The current improvement scheme generally installs a heat dissipation device behind the photocell, such as a heat dissipation fin, a heat pipe and a microchannel. Although the improvement scheme can achieve a certain heat dissipation effect, it increases the volume and weight of the receiving device. For the active heat dissipation device, it will also consume additional energy, which has a greater impact on the overall efficiency of the laser energy transmission system and is not conducive to the practical application of the laser energy transmission system. How to control the heat accumulation of the photocell within a reasonable range and not cause other adverse effects on the receiving device, there is currently no relevant mature solution in China. In view of this, the embodiment of the present application provides an adaptive pulsed laser wireless energy transmission system, method and electronic device as described below.

[0058] See also Figure 1 , Figure 1 The block diagram of an adaptive pulse laser wireless energy transmission system provided in the embodiment of the present application is explained in detail below. The system includes: a transmitting end, a receiving end and a feedback control end; the transmitting end includes: a pulse laser generating module 210 and a branch transmission module 220; the receiving end includes: a photoelectric conversion module 230 and an energy storage conversion module 240; the feedback control end includes: a controller 250;

[0059] The pulse laser generating module 210 is used to generate pulse laser based on preset control parameters and transmit the pulse laser to the branch transmission module 220; the branch transmission module 220 is used to transmit a part of the pulse laser to the controller 250 and transmit another part of the pulse laser to the photoelectric conversion module 230;

[0060] The photoelectric conversion module 230 is used to receive another part of the pulsed laser emitted by the branch transmission module 220 and convert the light energy of the pulsed laser into electrical energy; the energy storage conversion module 240 is used to track the maximum power of the photoelectric conversion module 230 and convert the electrical energy based on the maximum power;

[0061] The controller 250 is used to: cross-disturb the preset control parameters based on the optical power and maximum power of a portion of the pulsed laser transmitted by the branch transmission module 220, and feed back the cross-disturbed control signal to the pulsed laser generating module 210.

[0062] Exemplarily, the transmitting end can be: the energy transmitting end of the adaptive pulse laser wireless energy transmission system, which is used to convert electrical energy into laser light and transmit it to the receiving end through free space; specifically, the pulse laser can generate a laser pulse signal with a certain duty cycle and frequency, and the laser pulse signal can be divided into two transmission paths, one of which reflects a part of the laser pulse signal to the optical power meter at the feedback control end for optical power monitoring, and the other part of the laser pulse signal is transmitted to the photovoltaic cell array at the receiving end for photoelectric conversion. The receiving end can be: the energy receiving end of the adaptive pulse laser wireless energy transmission system, which is used to receive and convert laser energy, convert it into electrical energy, and then power electrical equipment such as loads or batteries; specifically, the photovoltaic cell array can receive the other part of the laser pulse signal transmitted in the free space branch, convert the received laser energy into electrical energy for power supply, and track the maximum power point of the photoelectric conversion in real time during the conversion process. The feedback control end can be: the energy transmission and reception control end of the adaptive pulse laser wireless energy transmission system, which is used to dynamically adjust the transmission parameters (preset control parameters) of the transmitting end according to the pulse laser emission state of the transmitting end and the feedback of the photoelectric conversion of the receiving end, such as pulse frequency, pulse duty cycle, beam aiming and other parameters, so as to achieve high-efficiency laser wireless energy transmission; it can be specifically combined with the real-time tracking of the maximum power and the real-time measurement of the corresponding optical power by the optical power meter, calculate the photoelectric conversion efficiency, apply cross-disturbance to the pulse duty cycle and frequency, and feed back to the transmitting end to find the maximum photoelectric conversion efficiency of the photovoltaic cell output.

[0063] Alternatively, if Figure 2 As shown, the photoelectric conversion module 230 may include: a laser photovoltaic cell array for photoelectric conversion, and the feedback control end of the adaptive pulse laser wireless energy transmission system may include: a microcontroller 250 (controller 250), which may specifically include an electronic computing unit and a logic unit (CPU), a memory (program memory and data memory), an I / O port (input / output port) and other components integrated on a single chip. The microcontroller 250 can send a control signal including a frequency f and a duty cycle δ to the pulse generation module, and the pulse generation module controls the pulse laser to emit a pulse laser with a frequency of f and a duty cycle of δ; the pulse laser is divided into two parts after passing through the branch transmission module 220, one part is irradiated to the optical power meter, and the optical power meter measures the optical power P irradiated by the part L The other part is irradiated to the laser cell array of the photoelectric conversion module 230, which converts the light energy into electrical energy and obtains the maximum electrical power P through optimal load matching. E The microcontroller 250 calculates the optical power P at the moment of frequency f and duty cycle δ. L and the maximum electrical power P E, calculate the photoelectric conversion efficiency η(i), and apply cross perturbations to the frequency f and duty cycle δ to make the system work at the optimal photoelectric conversion efficiency point η max , thereby achieving high conversion efficiency laser wireless energy transmission.

[0064] In particular, based on the above implementation process, (1) the frequency and duty cycle of the pulsed laser can be adaptively adjusted to enable the photovoltaic array to find the optimal photoelectric conversion efficiency. (2) The thermal accumulation of the photovoltaic cell can be controlled within a reasonable range, thereby reducing the impact of excessive thermal accumulation on the photovoltaic cell conversion efficiency. (3) High-efficiency laser wireless energy transmission can be performed. (4) The demand for the heat dissipation system of the laser energy receiving device can be reduced, the weight and volume of the receiving device can be reduced, and the energy consumption and cost can be greatly reduced.

[0065] By setting a branch transmission module 220 at the transmitting end, a part of the pulse laser is transmitted to the receiving end for photoelectric conversion and maximum power tracking, and the other part is used to measure the real-time optical power and transmitted to the controller 250 at the feedback control end. Combined with the maximum power tracked by the receiving end, it is fed back to the pulse laser generating module 210 at the transmitting end after cross-disturbance. After receiving the feedback signal, the pulse laser generating module can be adjusted to the optimal pulse laser frequency and duty cycle, and the emission control of the pulse laser required for the photoelectric conversion work at the receiving end can be realized; it effectively solves the problem of excessive heat accumulation and reduced conversion efficiency of the photovoltaic cell array under high-power laser irradiation, and at the same time, adds a controller 250 at the feedback control end, and realizes high-conversion-efficiency laser wireless energy transmission by real-time feedback of the control parameters of the pulse laser at the receiving end.

[0066] In one embodiment, the pulse laser generation module 210 includes: a pulse control system and a pulse laser;

[0067] The pulse control system is used to: receive the control signal fed back by the controller 250, and convert the control signal into a pulse modulated current signal; wherein the control signal includes: a preset pulse frequency signal and a preset pulse duty cycle signal; the pulse laser is used to: generate a pulse laser based on the pulse modulated current signal.

[0068] For example, please refer to Figure 2, the pulse laser generating module 210 may specifically include: a pulse control system and a pulse laser. The pulse control system may be: receiving a control signal including a certain duty cycle and frequency transmitted by the microcontroller 250, generating a pulse signal based on a communication protocol, and finally forming a pulse modulated current signal after signal filtering, amplification, and DC superposition to add it to the pulse laser, so as to generate a pulse laser that meets the control conditions. The pulse laser may be: a semiconductor laser, the pulse frequency range may be: 1Hz to 100MHz, the pulse width range may be: 10ns to 1s, the pulse duty cycle may be: 1% to 90%, the wavelength may be in the range of 400nm to 2000nm, the output power may be in the range of 1W to 10000W, the pulse frequency may be in the range of 1Hz to 100MHz, and the pulse duty cycle may be in the range of 1% to 90%. The microcontroller 250 transmits the pulse duty cycle and frequency signal to the pulse control system. The pulse control system can configure the DDS chip through the communication protocol to write the pulse duty cycle and frequency information. After signal filtering, amplification, and DC superposition, the final pulse DC modulated signal is finally formed and added to the pulse laser to drive the pulse laser to emit pulse laser, thereby realizing effective long-distance energy transmission.

[0069] By setting up a pulse control system and a pulse laser to form a pulse generation module, dynamic feedback information from a feedback control terminal can be received in real time to control the emission of excitation pulses.

[0070] In one embodiment, the split transmission module 220 includes: a spectroscope, an optical power meter, and a tracking and aiming device;

[0071] The spectrometer is used to reflect a part of the pulse laser to the optical power meter according to a preset splitting ratio, and transmit another part of the pulse laser to the tracking and aiming device; the optical power meter is used to measure the optical power of a part of the pulse laser reflected by the spectrometer; the tracking and aiming device is used to track the other part of the pulse laser transmitted by the spectrometer and emit it to the photoelectric conversion module 230.

[0072] For example, please refer to Figure 2, the branch transmission module 220 may specifically include a beam splitter, an optical power meter and a tracking and aiming device. A beam splitter may be an optical element that splits incident light into two different light beams at a specified ratio, and may be a cubic beam splitter, a flat beam splitter, a polarizing beam splitter, a non-polarizing beam splitter, a dichroic beam splitter, etc.; the beam splitting ratio of the beam splitter may be f1:f2, and the light energy of f1 / (f1+f2) is irradiated to the optical power meter, and f2 / (f1+f2) is transmitted to the tracking and aiming device. The optical power meter may be placed on the optical path reflected by the laser lens, and the distance from the optical power meter to the reflecting plane of the reflector and then to the output end of the laser is equal to the distance from the laser cell array to the output end of the laser. The tracking and aiming device may be an image recognition tracking device driven by a three-dimensional motor, which tracks the laser photovoltaic cell array in real time, and a light homogenizer may be installed on the bracket thereof. The device has a three-dimensional rotation function, and uses an image recognition system, a positioning navigation system, etc. to track the laser energy receiving device. The pulsed laser passes through a spectrometer to reflect 1% of the laser light to the optical power meter for measuring the optical power, and the rest is transmitted to the tracking and aiming device. The tracking and aiming device identifies and tracks the laser battery array and uses the laser battery array to convert the light energy into electrical energy at the remote end.

[0073] By arranging a beam splitter, an optical power meter and a tracking and aiming device to form a branch transmission module 220, the accuracy of optical power measurement is ensured while the optical path is kept as simple as possible.

[0074] In one embodiment, the energy storage conversion module 240 includes: a power management device and a power consumption module; the power management device includes: a voltage and current acquisition circuit, an MPPT controller 250, a pulse width modulation circuit and a boost circuit; the power consumption module includes: a load circuit;

[0075] The voltage and current acquisition circuit is used to: acquire the output voltage and output current of the photoelectric conversion module 230 in real time; the MPPT controller 250 is used to: track the maximum power point of the photoelectric conversion module 230 based on the output voltage and output current; the pulse width modulation circuit is used to: output a pulse width modulation signal based on the maximum power point; the boost circuit is used to: modulate based on the pulse width modulation signal and feed it back to the photoelectric conversion module 230; the load circuit is used to: power the load or charge the battery based on the maximum power point.

[0076] Exemplarily, the energy storage conversion module 240 may specifically include a power management device and a power consumption module. The power management device may be composed of a software part of the MPPT (Maximum Power Point Tracking) controller 250 and hardware circuit parts such as a voltage and current acquisition circuit, a pulse width modulation circuit, and a boost circuit. The power consumption module may be composed of circuits where power consumption devices such as loads or batteries are located. Figure 3As shown, the input end of the power management device can be connected to the output terminal terminal of the photovoltaic cell array of the photoelectric conversion module 230, and the output voltage and current of the photovoltaic cell array are collected through the voltage and current collection circuit, and after analog-to-digital conversion, the result is input into the MPPT controller 250 to determine whether the photovoltaic cell array is working at the maximum power point, and then the pulse width modulation circuit outputs a pulse width modulation signal with a certain duty cycle to modulate the Boost boost circuit, and then collects the output current and voltage parameters of the photovoltaic cell again, and the cycle repeats. The power management device collects current and voltage information by using the current and voltage collection circuit, transmits it to the MPPT controller 250, modulates the PWM signal to the pulse width modulation circuit to drive the DCDC circuit to achieve load matching of the photovoltaic cell, so that the photovoltaic cell outputs the maximum power, extracts the maximum power to power the load or charge the battery, and at the same time, the microcontroller 250 collects the maximum power obtained by the power management device and the corresponding optical power measured by the optical power meter in real time, calculates the photoelectric conversion efficiency, applies cross-disturbance to the pulse duty cycle and frequency, and feeds back to the pulse control system, thereby finding the maximum photoelectric conversion efficiency output by the laser cell.

[0077] By setting up a voltage and current acquisition circuit, an MPPT controller 250, a pulse width modulation circuit and a boost circuit to form a power management device, the maximum power tracking of the photovoltaic array and the management of the output energy are achieved.

[0078] In one embodiment, the preset control parameters include: pulse frequency and pulse duty cycle; the controller 250 is also used to:

[0079] Based on the currently collected optical power and maximum power, the first photoelectric conversion efficiency is calculated; the pulse frequency and pulse duty cycle are cross-perturbed, and the pulse frequency signal and pulse duty cycle signal after cross-perturbation are fed back to the transmitting end; the optical power of the pulsed laser generated by the transmitting end and the maximum power tracked by the receiving end are re-collected, and the second photoelectric conversion efficiency is calculated based on the optical power and the maximum power; the maximum photoelectric conversion efficiency is determined based on the first photoelectric conversion efficiency and the second photoelectric conversion efficiency.

[0080] For example, Figure 4 As shown, the microcontroller 250 collects the maximum power value information P output by the power management device at the pulse frequency f and the duty cycle δ. E (i) and the optical power value P of the optical power meter L (i), calculate the photoelectric conversion efficiency η(i) (first photoelectric conversion efficiency) and store it in the register; the microcontroller 250 can embed a specially designed genetic algorithm for two-dimensional optimization, cross-perturb the duty cycle δ and frequency f of the pulsed laser, and transmit the cross-perturbation duty cycle δ and frequency f information to the pulse control system based on the communication protocol, and then the input end again collects the maximum electric power P extracted by the power management device E(i+1) value and the optical power P of the optical power meter L (i+1) value, calculate the photoelectric conversion efficiency η(i+1) (the second photoelectric conversion efficiency) and store it in the register, compare the η(i) value with the η(i+1) value and assign the maximum photoelectric conversion efficiency η max After several iterations, the maximum photoelectric conversion efficiency η of the laser cell array is finally found max Among them, the MPPT control algorithm can use the traditional optimization algorithm or the neural network to find the maximum power point.

[0081] By cross-perturbing the pulse frequency and duty cycle based on an improved optimization algorithm, the maximum photoelectric conversion efficiency of the laser cell array output can be obtained, which can control the thermal accumulation of the photocell within a reasonable range, thereby reducing the impact of excessive thermal accumulation on the conversion efficiency of the photocell and improving the conversion efficiency of the entire system within a certain period of time.

[0082] In one embodiment, the controller 250 is further configured to:

[0083] The optical power of the pulsed laser generated by the transmitting end and the maximum power tracked by the receiving end are repeatedly collected multiple times, and multiple photoelectric conversion efficiencies are calculated based on the optical power and the maximum power; the maximum photoelectric conversion efficiency is determined based on the multiple photoelectric conversion efficiencies.

[0084] For example, Figure 4 As shown in the figure, in order to ensure the accuracy and computational efficiency of the two-dimensional array genetic algorithm, it is necessary to specify the perturbation area of ​​duty cycle δ and frequency f so that the algorithm performs cross perturbation within a limited range. The duty cycle δ and frequency f change, and the photoelectric conversion efficiency will also change. Since the duty cycle δ and frequency f of the generated pulsed laser have an effective range, specifically, the pulse frequency range can be: 1Hz-100MHz, and the pulse duty cycle can be 1%-90%. This range is also the specified area of ​​perturbation. Therefore, the photoelectric conversion efficiency calculated beyond this range will have no reference value.

[0085] The process of determining the maximum photoelectric conversion efficiency by multiple iterations can be: (1) first determine the initial duty cycle, frequency and specified region. The duty cycle δ region is specified as [a, b], and a, b∈(0,1), and the frequency f region is specified as [c, d], and c, d∈[1,1010]; (2) the duty cycle δ and frequency f are encoded, and the parameter can be represented by a binary encoding symbol with a length of k, then it generates a total of 2k different encodings, which can make the corresponding relationship when encoding the parameters as follows:

[0086]

[0087] in, = , the duty cycle δ of frequency f is in the range of [0,1000000], and the parameter can be represented by a binary code symbol of length N, which generates a total of 2N different codes, so that the corresponding relationship when encoding the parameters becomes:

[0088]

[0089] in, = , the initial duty cycle and frequency are set to (a,c).

[0090] (3) Based on the optical power value PL and the maximum power value PE collected by the optical power meter and the maximum power collection device under the initial duty cycle and frequency conditions, the photoelectric conversion efficiency is calculated by substituting them into the adaptive function.

[0091]

[0092] (4) Select the duty cycle δ and the encoding signal of the frequency signal f for cross perturbation:

[0093]

[0094] The duty cycle δ and the frequency signal f can be cross-perturbed to obtain the next duty cycle and frequency signal , substitute into the adaptive function and calculate the duty cycle and frequency signal The corresponding photoelectric conversion efficiency. Compare η(a, c) and η( , ) to obtain a larger photoelectric conversion efficiency. After several iterations (for example, 200 times of empirical value) and comparisons, the maximum photoelectric conversion efficiency η of the laser cell array can be finally found. max .

[0095] By iteratively cross-perturbing the pulse frequency and duty cycle multiple times based on an improved optimization algorithm, the maximum photoelectric conversion efficiency of the laser cell array output can be found, which can control the thermal accumulation of the photocell within a reasonable range and improve the conversion efficiency of the entire system.

[0096] In one embodiment, the photoelectric conversion module 230 includes: a photoelectric cell array consisting of a plurality of photoelectric cells connected in series and parallel.

[0097] Exemplarily, the photocell array can be: a semiconductor photocell that withstands a predetermined power density and converts laser radiation energy into direct current. The selected materials can be single-junction or multi-junction gallium arsenide, silicon, indium gallium arsenide and other semiconductor materials, and their band gaps must meet the output wavelength of the pulsed laser. The photoelectric conversion module 230 of the laser energy receiving device can be a series-parallel connection of multiple photocells to ultimately form a large-area photocell array, increase the light-receiving area, and increase the voltage at the receiving end. Bypass diodes can be connected between each photocell to avoid damage caused by non-uniform illumination and improve the working efficiency and life of the photocell.

[0098] Also, see Figure 5 , Figure 5 A flowchart of an adaptive pulsed laser wireless energy transmission method is also provided for an embodiment of the present application. The method is applied to the adaptive laser energy transmission system in any of the above-mentioned embodiments; the method includes: step 100, step 120 and step 140.

[0099] Step 100: Generate pulsed laser based on preset control parameters, and transmit the pulsed laser in split paths;

[0100] Step 120: performing photoelectric conversion based on a portion of the pulsed laser transmitted by the branching;

[0101] Step 140: Based on the optical power measured for another part of the pulsed laser transmitted in the branch and the maximum power of the photoelectric conversion work, cross-disturb the preset control parameters, and perform feedback control based on the preset control parameters after the cross-disturbance.

[0102] Exemplarily, since the principle of solving the problem by the adaptive pulse laser wireless energy transmission method in the embodiment of the present application is similar to that of the aforementioned embodiment of the adaptive pulse laser wireless energy transmission system, the implementation of the adaptive pulse laser wireless energy transmission method in this embodiment can refer to the description in the embodiment of the aforementioned adaptive pulse laser wireless energy transmission system, and the repeated parts will not be repeated.

[0103] See also Figure 6 , Figure 6 31 is a block diagram of an electronic device. The electronic device 300 may include a memory 311, a storage controller 312, a processor 313, a peripheral interface 314, an input and output unit 315, and a display unit 316. A person skilled in the art may understand that Figure 6 The structure shown is only for illustration and does not limit the structure of the electronic device 300. For example, the electronic device 300 may also include Figure 6 More or fewer components as shown, or with Figure 6 Different configurations are shown.

[0104] The above-mentioned memory 311, storage controller 312, processor 313, peripheral interface 314, input / output unit 315, and display unit 316 are electrically connected to each other directly or indirectly to achieve data transmission or interaction. For example, these components can be electrically connected to each other through one or more communication buses or signal lines. The above-mentioned processor 313 is used to execute the executable module stored in the memory.

[0105] The memory 311 may be, but is not limited to, a random access memory (RAM), a read only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable read-only memory (EEPROM), etc. The memory 311 is used to store programs, and the processor 313 executes the program after receiving the execution instruction. The method executed by the electronic device 300 defined by the process disclosed in any embodiment of the present application can be applied to the processor 313, or implemented by the processor 313.

[0106] The processor 313 may be an integrated circuit chip with signal processing capability. The processor 313 may be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it may also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present application may be implemented or executed. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0107] The above-mentioned peripheral interface 314 couples various input / output devices to the processor 313 and the memory 311. In some embodiments, the peripheral interface 314, the processor 313 and the memory controller 312 can be implemented in a single chip. In some other examples, they can be implemented by separate chips.

[0108] The input and output unit 315 is used to provide input data to the user. The input and output unit 315 can be, but is not limited to, a mouse and a keyboard.

[0109] The display unit 316 provides an interactive interface (e.g., a user operation interface) between the electronic device 300 and the user for the user to refer to. In this embodiment, the display unit 316 may be a liquid crystal display or a touch display. The liquid crystal display or the touch display may display the process of the processor executing the program.

[0110] The electronic device 300 in this embodiment can be used to execute each step in each method provided in the embodiments of the present application.

[0111] In addition, an embodiment of the present application further provides a storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps in the above method embodiment are executed.

[0112] The computer program product of the above method provided in the embodiment of the present application includes a storage medium storing program code, and the instructions included in the program code can be used to execute the steps in the above method embodiment. For details, please refer to the above method embodiment, which will not be repeated here.

[0113] In the embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the modules is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some communication interfaces, devices or units, which can be electrical, mechanical or other forms. The functional modules in the embodiments of the present application can be integrated together to form an independent part, or each module can exist separately, or two or more modules can be integrated to form an independent part.

[0114] It should be noted that if the function is implemented in the form of a software function module and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk, and other media that can store program codes.

[0115] In this document, relational terms such as first and second, etc. are used merely to distinguish one entity or operation from another entity or operation, but do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0116] The above description is only an embodiment of the present application and is not intended to limit the protection scope of the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An adaptive pulsed laser wireless energy transmission system, characterized in that: The system comprises: a transmitting end, a receiving end and a feedback control end; The transmitting end includes: a pulse laser generating module and a branch transmission module; the receiving end includes: a photoelectric conversion module and an energy storage conversion module; the feedback control end includes: a controller; The pulse laser generating module is used to generate pulse laser based on preset control parameters and transmit the pulse laser to the branch transmission module; the branch transmission module is used to transmit a part of the pulse laser to the controller and transmit another part of the pulse laser to the photoelectric conversion module; The photoelectric conversion module is used to receive another part of the pulse laser emitted by the branch transmission module and convert the light energy of the pulse laser into electrical energy; the energy storage conversion module is used to track the maximum power of the photoelectric conversion module and convert the electrical energy based on the maximum power; The controller is used to: cross-disturb the preset control parameter based on the optical power of a part of the pulsed laser transmitted by the branch transmission module and the maximum power, and feed back the cross-disturbed control signal to the pulsed laser generating module; Among them, the preset control parameters include: pulse frequency and pulse duty cycle; the controller is also used to: calculate the first photoelectric conversion efficiency based on the currently collected optical power and maximum power; cross-perturb the pulse frequency and pulse duty cycle, and feed back the cross-perturbed pulse frequency signal and pulse duty cycle signal to the transmitting end; re-collect the optical power of the pulsed laser generated by the transmitting end and the maximum power tracked by the receiving end, and calculate the second photoelectric conversion efficiency based on the optical power and the maximum power; determine the maximum photoelectric conversion efficiency based on the first photoelectric conversion efficiency and the second photoelectric conversion efficiency.

2. The system according to claim 1, characterized in that The pulse laser generation module includes: a pulse control system and a pulse laser; The pulse control system is used to: receive the control signal fed back by the controller, and convert the control signal into a pulse modulated current signal; wherein the control signal includes: a preset pulse frequency signal and a preset pulse duty cycle signal; The pulse laser is used to generate pulse laser based on the pulse modulated current signal.

3. The system according to claim 1, characterized in that The branch transmission module includes: a spectroscope, an optical power meter and a tracking and aiming device; The beam splitter is used to: reflect a part of the pulse laser to the optical power meter according to a preset splitting ratio, and transmit another part of the pulse laser to the tracking and aiming device; The optical power meter is used to: measure the optical power of a portion of the pulsed laser reflected by the beam splitter; The tracking and aiming device is used to track another part of the pulse laser transmitted by the beam splitter and emit it to the photoelectric conversion module.

4. The system according to claim 1, characterized in that The energy storage conversion module includes: a power management device and a power consumption module; The power management device includes: a voltage and current acquisition circuit, an MPPT controller, a pulse width modulation circuit and a boost circuit; the power consumption module includes: a load circuit; The voltage and current acquisition circuit is used to: acquire the output voltage and output current of the photoelectric conversion module in real time; The MPPT controller is used to: track the maximum power point of the photoelectric conversion module based on the output voltage and the output current; The pulse width modulation circuit is used to: output a pulse width modulation signal based on the maximum power point; The boost circuit is used to: perform modulation based on the pulse width modulation signal and feed back to the photoelectric conversion module; The load circuit is used to: supply power to a load or charge a battery based on the maximum power point.

5. The system according to claim 1, characterized in that The controller is also used for: Repeatedly collecting the optical power of the pulsed laser generated by the transmitting end and the maximum power tracked by the receiving end, and calculating multiple photoelectric conversion efficiencies based on the optical power and the maximum power; A maximum photoelectric conversion efficiency is determined based on the plurality of photoelectric conversion efficiencies.

6. The system according to any one of claims 1 to 5, characterized in that: The photoelectric conversion module comprises: a photoelectric cell array composed of a plurality of photoelectric cells connected in series and parallel.

7. An adaptive pulse laser wireless energy transmission method, characterized in that: The method is applied to the adaptive pulse laser wireless energy transmission system according to any one of claims 1 to 6; the method comprises: Generate pulsed laser based on preset control parameters, and transmit the pulsed laser in split paths; Photoelectric conversion is performed based on a portion of the pulsed laser transmitted by splitting; Based on the optical power measured for another part of the pulsed laser transmitted in the branch path and the maximum power of the photoelectric conversion work, the preset control parameters are cross-perturbed, and feedback control is performed based on the preset control parameters after the cross-perturbation.

8. An electronic device, characterized in that: include: A processor and a memory, wherein the memory stores machine-readable instructions executable by the processor, and when the electronic device is running, the machine-readable instructions are executed by the processor to perform the steps of the method as claimed in claim 7.

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