CN113472095A - Laser spot detection and laser energy transmission composite photoelectric receiving equipment - Google Patents
Laser spot detection and laser energy transmission composite photoelectric receiving equipment Download PDFInfo
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- 229910052738 indium Inorganic materials 0.000 claims description 2
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/30—Circuit arrangements or systems for wireless supply or distribution of electric power using light, e.g. lasers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
- G01J1/4257—Photometry, e.g. photographic exposure meter using electric radiation detectors applied to monitoring the characteristics of a beam, e.g. laser beam, headlamp beam
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other DC sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other DC sources, e.g. providing buffering with light sensitive cells
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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Abstract
本发明涉及激光无线能量传输领域，具体涉及一种激光光斑检测及激光传能复合光电接收设备。包括光电池板和光电检测及能源管理单元，所述光电池板包括光电池单体、光电探测器、信标灯和基板，光电池单体、光电探测器和信标灯设置在基板上；光电检测及能源管理单元包括DC/DC电源、信标灯驱动电路、光电探测信号采样电路、最大功率跟踪单元、稳压电路和主控模块。本发明通过采用光电探测器阵列对激光进行测量，具有时间分辨率高、响应灵敏等特点，对探测阵列的每个探测单元进行精确定标后，可以实时测量激光远场光斑时间和空间分布函数以及照射到光电池板上的绝对光强。
The invention relates to the field of laser wireless energy transmission, in particular to a composite photoelectric receiving device for laser spot detection and laser energy transmission. Including a photocell panel and a photoelectric detection and energy management unit, the photocell panel includes a photocell, a photodetector, a beacon lamp and a substrate, and the photocell, photodetector and beacon lamp are arranged on the substrate; photoelectric detection and energy management The unit includes a DC/DC power supply, a beacon lamp driving circuit, a photoelectric detection signal sampling circuit, a maximum power tracking unit, a voltage regulator circuit and a main control module. The invention uses the photodetector array to measure the laser light, and has the characteristics of high time resolution, sensitive response, etc. After accurately marking each detection unit of the detection array, the time and space distribution functions of the laser far-field spot can be measured in real time. and the absolute light intensity hitting the photovoltaic panels.
Description
Technical Field
The invention relates to the field of laser wireless energy transmission, in particular to a laser spot detection and laser energy transmission composite photoelectric receiving device.
Background
The laser wireless energy transmission technology uses a high-energy laser beam as an energy carrier, the high-energy laser beam is emitted by a collimating optical system, and the light energy is converted into electric energy by using a laser battery array at a far end, so that the technology of remote wireless energy transmission and supply is realized. The laser wireless energy transmission has strong directivity and concentrated energy, can realize power supply at a longer distance by using smaller transmitting power, and is very suitable for static and dynamic energy transmission of a remote small target.
The difference between the laser wireless energy transmission system and the solar power generation system is that the solar power generation system uses sunlight as energy and has the characteristic of uniform light intensity distribution, and the laser wireless energy transmission system uses laser as a medium and receives light beams at a remote place with nonuniform light intensity distribution. The method can accurately measure the space-time distribution of the laser far-field spot intensity, and has important significance for evaluating the beam control capability, the aiming capability and the like of the laser energy transmission emission end. The traditional laser energy transmission photoelectric receiving device only has a photoelectric conversion function, converts laser irradiated on a battery plate into electric energy, and cannot directly measure the intensity distribution of received laser spots, so that other methods are generally needed to measure the spatial-temporal distribution of far-field spot intensity, and unnecessary difficulty is brought to the application of a laser wireless energy transmission system.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides a laser spot detection and laser energy transmission composite photoelectric receiving device.
The technical scheme of the invention is as follows:
a laser spot detection and laser energy transfer composite photoelectric receiving device comprises a photoelectric cell plate and a photoelectric detection and energy management unit, wherein the photoelectric cell plate comprises a photoelectric cell monomer, a photoelectric detector, a beacon light and a substrate, and the photoelectric cell monomer, the photoelectric detector and the beacon light are welded on the substrate through an SMT (surface mount technology) process;
the photoelectric detector is a silicon photodiode or an indium gallium arsenic photoelectric detector and is positioned between the photoelectric cell monomers, when laser irradiates on the photoelectric detector on the photoelectric cell plate, the photoelectric detector converts an optical signal into a current signal based on a photoelectric effect, and the higher the laser light intensity is, the stronger the current signal is;
the beacon light provides beacon light for the transmitting end of the laser energy transmission system to realize the alignment of the laser energy transmission transmitting end and the photoelectric cell plate;
the photoelectric detection and energy management unit comprises a DC/DC power supply, a beacon light driving circuit, a photoelectric detection signal sampling circuit, a maximum power tracking unit, a voltage stabilizing circuit and a main control module;
the DC/DC power supply provides stable voltage power supply for the beacon light driver and the main control module in the photoelectric detection and energy management unit;
the beacon light driving circuit drives the beacon light on the optical cell panel by using the DC/DC power supply on the panel, controls the on-off of the beacon light according to the command of the main control computer, and reports the working state of the beacon light by receiving the inquiry of the main control computer on the working state of the beacon light;
the photoelectric detection signal sampling circuit is used for carrying out AD sampling on signals obtained by photoelectric detectors arranged on the photoelectric cell board and reporting the sampling result to the main control module;
the photovoltaic cell array on the photovoltaic cell board is synthesized into a path through a diode and connected with the maximum power tracking unit, and the maximum power tracking circuit can extract the photoelectric conversion energy of the photovoltaic cell to the maximum extent and report the voltage and current information of the extracted energy to the main control module;
the voltage stabilizing circuit is used for providing stable output for the load by the converted electric energy;
and the main control module codes the functions of the photoelectric detector data and the beacon switch data, sends the coded data to the main control computer, and simultaneously receives the command of the transmitting end of the laser energy transmission system to control the beacon lamp switch.
The invention achieves the following beneficial effects:
1. the invention measures the laser by adopting the photoelectric detector array, has the characteristics of high time resolution, sensitive response and the like, and can measure the time and the space distribution function of laser far-field facula and the absolute light intensity irradiated on the photoelectric cell plate in real time after accurately calibrating each detection unit of the detection array.
2. By adopting the high-efficiency photoelectric converter, the light energy irradiated on the photoelectric cell plate is converted into the electric energy, so that the photoelectric energy conversion is realized, and the higher photoelectric conversion efficiency is ensured.
3. The laser spot detection and laser energy transmission composite photoelectric receiving equipment can meet the requirements of photoelectric energy conversion, can also carry out spot intensity distribution measurement, and carries out evaluation and measurement on the beam control capability and the aiming capability of a laser energy transmission end.
Drawings
FIG. 1 is a schematic diagram of a laser spot detection and laser energy transmission composite photoelectric receiving device;
FIG. 2 is a schematic view of a structure of a photovoltaic panel
Fig. 3 is a schematic diagram of laser energy transmission photoelectric receiving equipment measuring beam pointing accuracy and laser energy transmission test.
Detailed Description
To facilitate an understanding of the present invention by those skilled in the art, specific embodiments thereof are described below with reference to the accompanying drawings.
Fig. 1 is a schematic diagram of a laser spot detection and laser energy transmission composite photoelectric receiving device according to the present invention. The laser spot detection and laser energy transmission composite photoelectric receiving equipment can be used for photoelectric energy conversion, power supply for loads, spot intensity distribution measurement and measurement of aiming accuracy of a laser energy transmission transmitting end. It includes photoelectric cell board, photoelectric detection and energy management unit.
In fig. 3, the laser energy transmission system is composed of a laser wireless energy transmitting end and a receiving end, the laser wireless energy transmitting end includes a laser, a tracking and aiming system, a driving system and a main control system, and the receiving end includes a photocell plate, a photoelectric detection and energy management unit and a load. When laser wireless energy transmission is carried out, the transmitting end receives indication of a beacon light on the photoelectric cell plate, and the beacon light adopts a near infrared light indicating lamp with the wavelength of 870 nm. The transmitting end tracking and aiming system carries out pointing aiming on the receiving end and transmits laser to irradiate on the photoelectric cell plate, and the laser adopts an optical fiber coupling semiconductor laser with the wavelength of 808 nm.
The photovoltaic cell panel in fig. 2 is composed of 76 photovoltaic cells, each 19 photovoltaic cells are connected in series to form one group, 4 groups are provided in total, and the photovoltaic cells are arranged in a circumferential splicing mode from inside to outside according to the light intensity distribution characteristics of Gaussian beams. The photoelectric detector adopts silicon photodiodes, the 25 silicon photodiodes are regularly arranged in gaps among the photoelectric cell units, the response wave band of the silicon photodiodes is 320-1000nm, the light sensing area is 0.2mm, and the arrangement gap between the two photoelectric cell units is 1 mm. The silicon photodiode and the photocell unit are welded on the substrate through an SMT process, and the substrate is a PCB substrate, plays a role in electrical connection and is connected with the photoelectric detection and energy management unit.
The 4 groups of photocell units on the photocell plate are connected in parallel to a maximum power tracking unit of the photoelectric detection and energy management unit, and the maximum power tracking unit is used for adjusting the output voltage of the photocell when the illumination intensity, the environmental temperature and the load resistance value are changed, so that the photocell always works near the maximum power point. The voltage stabilizing circuit performs voltage transformation and stabilization processing on the voltage output by the maximum power tracking unit to supply power to a load.
The DC/DC power supply on the photoelectric detection and energy management unit provides stable voltage power supply for each functional module in the equipment, and is responsible for converting 8V power supply provided by the lithium battery into 5V voltage used by driving of the beacon light and 3.3V voltage used by the main control module. The beacon light driving circuit drives and lights an indicator light with the wavelength of 870 nm. The photoelectric detection signal sampling circuit samples current signals of the optical detector and reports the result to the main control module, and the main control module encodes the acquired data and transmits the encoded data to the transmitting end in real time through wireless communication.
And the transmitting end main control system processes the received current sampling information of the photoelectric detectors, and the light intensity values of 25 photoelectric detectors on the photoelectric cell plate are obtained through processing by calibrating the corresponding numerical value of each photoelectric detector in advance. The silicon photodiodes located at different positions of the photocell plate receive different laser light intensities, the generated currents are different, the currents generated by the silicon photodiodes are calibrated, light intensity absolute values corresponding to different currents can be obtained, and real-time distribution of the received light spots is obtained by performing surface fitting.
The method for measuring the beam pointing accuracy by using the device comprises the following steps: repeating the measurement n times (n is more than or equal to 10). And calculating the position coordinates of the gravity center of the laser beam at a certain moment according to the following formula:
in the formula:
xi-the abscissa of the position of the center of gravity of the laser beam at the ith moment; y isi-vertical coordinate of barycentric position of laser beam at the ith moment.
x-the spatial abscissa; y-the spatial ordinate; i (x, y) -Point (x, y) position intensity.
The mean barycentric position coordinates of the laser beam are:
in the formula (I), the compound is shown in the specification,
-mean center of gravity position abscissa of laser beam;
-mean center of gravity position ordinate of the laser beam.
And calculating the average deviation amount of the light beam according to the average gravity center position coordinate of the light beam as follows:
obtaining the beam pointing accuracy:
wherein L is the distance between the laser emission end and the photocell plate.
The above-described embodiments of the present invention do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (10)
1. The utility model provides a laser facula detects and compound photoelectric receiving equipment of laser biography energy which characterized in that: the photoelectric detection and energy management system comprises a photoelectric cell panel and a photoelectric detection and energy management unit, wherein the photoelectric cell panel comprises a photoelectric cell monomer, a photoelectric detector, a beacon light and a substrate;
the photoelectric detection and energy management unit comprises a DC/DC power supply, a beacon light driving circuit, a photoelectric detection signal sampling circuit, a maximum power tracking unit, a voltage stabilizing circuit and a main control module;
the photoelectric cell monomer is electrically connected with the maximum power tracking unit, the beacon light driving circuit is electrically connected with the beacon light, the photoelectric detection signal sampling circuit is electrically connected with the photoelectric detector, the main control module is electrically connected with the beacon light driving circuit, the photoelectric detection signal sampling circuit and the maximum power tracking unit, and the DC/DC power supply provides stable voltage power supply for the beacon light driving and the main control module.
2. The laser spot detection and laser energy transmission composite photoelectric receiving device according to claim 1, wherein: the photodetectors are located between the photocell cells.
3. The laser spot detection and laser energy transmission composite photoelectric receiving device according to claim 1, wherein: the photocell monomer, the photodetector and the beacon light are welded to the substrate through an SMT process.
4. The laser spot detection and laser energy transmission composite photoelectric receiving device according to claim 1, wherein: the beacon light driving circuit drives the beacon light on the optical cell panel by using the DC/DC power supply on the panel, controls the on-off of the beacon light according to the command of the main control computer, and reports the working state of the beacon light by receiving the inquiry of the main control computer on the working state of the beacon light.
5. The laser spot detection and laser energy transmission composite photoelectric receiving device according to claim 1, wherein: and the photoelectric detection signal sampling circuit is used for carrying out AD sampling on signals obtained by the photoelectric detectors arranged on the photoelectric cell plate and reporting the sampling result to the main control module.
6. The laser spot detection and laser energy transmission composite photoelectric receiving device according to claim 1, wherein: the photovoltaic cell array on the photovoltaic cell board is synthesized into a path through a diode and connected with the maximum power tracking unit, the maximum power tracking circuit can extract the photoelectric conversion energy of the photovoltaic cell to the maximum extent, and simultaneously reports the voltage and current information of the extracted energy to the main control module.
7. The laser spot detection and laser energy transmission composite photoelectric receiving device according to claim 6, wherein: and the converted electric energy provides stable output for the load through the voltage stabilizing circuit.
8. The laser spot detection and laser energy transmission composite photoelectric receiving device according to claim 7, wherein: and the main control module codes the functions of the photoelectric detector data and the beacon switch data, sends the coded data to the main control computer, and simultaneously receives the command of the transmitting end of the laser energy transmission system to control the beacon lamp switch.
9. The laser spot detection and laser energy transmission composite photoelectric receiving device according to claim 1, characterized in that: the photodetector is a silicon photodiode.
10. The laser spot detection and laser energy transmission composite photoelectric receiving device according to claim 1, characterized in that: the photoelectric detector is an indium gallium arsenic photoelectric detector.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114221611A (en) * | 2021-12-15 | 2022-03-22 | 山东航天电子技术研究所 | An intelligent reconfigurable photovoltaic panel suitable for laser wireless energy transmission |
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