CN114221611A - Intelligent reconfigurable photoelectric cell board suitable for laser wireless energy transmission - Google Patents
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Abstract
The invention belongs to the technical field of laser wireless energy transmission, and relates to an intelligent reconfigurable photoelectric cell board suitable for a photoelectric receiving subsystem in a laser wireless energy transmission system. The method comprises the steps of constructing a photocell array, constructing an intelligent reconfigurable laser cell panel and constructing an intelligent reconfigurable control algorithm. By adopting the non-traditional fixed photocell layout structure, the intelligent laser panel can be combined with the energy distribution of the actual irradiation facula to carry out appropriate configuration reconstruction in the actual laser wireless energy transmission application process, and has important practical significance for obtaining the optimal stable electric power output. By adopting the scheme of integrally designing the photocell array and the intelligent control processing unit, the influence of the decrease of the photoelectric conversion efficiency caused by the light beam jitter and the light spot offset of the photocell plate at the laser energy receiving end is reduced, and the method has practical significance for improving the whole photoelectric conversion efficiency of the photocell plate array.
Description
Technical Field
The invention belongs to the technical field of laser wireless energy transmission, and relates to an intelligent reconfigurable photoelectric cell panel suitable for laser wireless energy transmission.
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 system is different from a solar power generation system in that: (1) the solar power generation system uses sunlight as energy and has the characteristic of uniform light intensity distribution, the laser wireless energy transmission system uses laser as a medium, and the light intensity distribution of light beams received at a remote place can be influenced by a transmitting end, a transmission medium (air) and a receiving end to generate the phenomena of light beam jitter, facula offset and the like, so that the received light intensity distribution of the photovoltaic cell panel is not uniform; (2) the solar energy photocell receiving array mainly comprises photovoltaic cells because the received spectral band of the solar energy photocell receiving array is a visible light band, and the laser wireless energy transmission system photocell receiving array comprises photocells capable of responding to the laser band.
Because of the process and the material performance, the laser cell cannot be made very large like a photovoltaic cell, and therefore, the single laser cell needs to be arranged into an array by adopting a series-parallel structure, namely, the whole photovoltaic cell array is divided into a plurality of branches which are connected in parallel, and each branch is formed by connecting a plurality of photovoltaic cells in series. Due to the characteristic of uneven energy distribution of laser spots, the characteristic parameters of each photocell of the photocell array are inconsistent, and at the beginning of design, the serial-parallel configuration and layout design of the photocell array can be only carried out according to theoretical simulation results and design experience. Therefore, once the photovoltaic cell array of the receiving end subsystem of the laser wireless energy transmission system is packaged and designed, the series-parallel structure of the photovoltaic cell array cannot be changed, and therefore the optimal photoelectric conversion efficiency and the optimal output electric power cannot be obtained under the condition that the light intensity distribution is not uniform.
Disclosure of Invention
In order to solve the defects mentioned in the background technology, the invention discloses an intelligent reconfigurable photoelectric cell panel suitable for laser wireless energy transmission.
In order to achieve the above purpose, the following technical solutions are provided:
an intelligent reconfigurable photovoltaic panel suitable for laser wireless energy transmission, comprising:
the method comprises the following steps of firstly, constructing a photocell array, wherein the photocell array comprises photocell sheets, sensors, beacon lamps, a PCB (printed circuit board) substrate and a structural frame;
step two, constructing an intelligent reconfigurable laser cell panel, which comprises a photovoltaic cell panel array, a data acquisition module, a switch matrix and an intelligent processing controller, wherein the data acquisition module is responsible for acquiring voltage and current signals of photovoltaic cells and sensors of the photovoltaic cell array and transmitting the acquired voltage and current signals of the photovoltaic cells and the sensors to the intelligent processing controller for processing; the switch matrix completes the recombination of the photocell array mainly according to the control instruction of the intelligent processing controller; the intelligent processing controller analyzes the photocell array data (photocell voltage, current and sensor information) acquired by the acquisition module, and gives a serial-parallel configuration scheme of the photocell array by using an array reconstruction algorithm;
step three, calculating the light intensity distribution of the target laser battery plate;
and step four, constructing an intelligent reconfigurable control algorithm.
Further, in the first step, the photocell array is formed by m × n pieces into a circle or a square, the photocells are labeled as b11, b12 and … bmn, and the sensors are labeled as S1, S2 and … Si according to the same rule.
Further, the photocell satisfies the relation (1) obtained from kirchhoff's law according to the equivalent circuit of the photocell, wherein I0Diode saturation current, I is laser battery output current, U is laser battery output voltage, q is an electronic charge constant, K is a Boltzmann constant, A is a diode characteristic factor, T is a thermodynamic temperature, R is a thermal coefficient, ands、Rprepresenting the equivalent series and parallel resistances of the photovoltaic cells, respectively:
in the formula IphThe photo-generated current of the photovoltaic cell is determined by illumination and temperature:
wherein VocIs the open circuit voltage of the photovoltaic cell, and α is the photovoltaic cell diode characteristic factor;
because the photo-generated current value of the photocell is in direct proportion to the illumination intensity of incident light, let beta be the illumination intensity and light
The proportionality constant between the generated currents and the illumination intensity P of the photocell are as follows:
the voltage and current values of the photocell can be seen from the formula (3) to reflect the illumination intensity of the photocell under illumination;
adopt the wavelength to be 808 nm's semiconductor laser, shine the photocell board after the collimation of emission optical system expands, gather output voltage, the electric current of photocell array through data acquisition module and be:
the output current of the photoelectric sensor is (I)S1,IS2,IS3…IS25) The formula (3) shows that the illumination intensity of the photocell plate corresponding to the photocell array is
Meanwhile, the output current distribution of the photoelectric sensor can be utilized, the light intensity distribution condition of the photoelectric cell plate can be obtained through an inversion algorithm, and the average value is obtained through multiple times of collection
According to the illumination intensity distribution of the photocell array and the current distribution of the photoelectric sensor, the energy distribution of the irradiation light spots of the photocell plate can be obtained through inversion.
And further, constructing a reconstruction algorithm based on a neural network model, firstly, carrying out data acquisition on information such as working voltage, working current and the like of the photovoltaic cell panel array assembly, obtaining the light intensity distribution condition of the illuminated photovoltaic cell panel by utilizing the calculation in the third step, taking the light intensity distribution condition as the input of a light intensity distribution tolerance model, and outputting a judgment result through error analysis and judgment of the model. And the accuracy of judging the light intensity distribution of the photovoltaic cell panel is further improved, the times of switch adjustment during the reconstruction of the photovoltaic cell array are reduced, and the optimal configuration scheme of the photovoltaic cell array is provided.
The invention has the beneficial effects that:
1. by adopting the non-traditional fixed photocell layout structure, the intelligent laser panel can be combined with the energy distribution of the actual irradiation facula to carry out appropriate configuration reconstruction in the actual laser wireless energy transmission application process, and has important practical significance for obtaining the optimal stable electric power output.
2. By adopting the scheme of integrally designing the photocell array and the intelligent control processing unit, the influence of the decrease of the photoelectric conversion efficiency caused by the light beam jitter and the light spot offset of the photocell plate at the laser energy receiving end is reduced, and the method has practical significance for improving the whole photoelectric conversion efficiency of the photocell plate array.
3. The invention can also be used for receiving the energy at the receiving end of the laser wireless energy transmission system and measuring the energy distribution of the target facula, and evaluating the light intensity distribution of the far-field high-power laser.
Drawings
FIG. 1 is a schematic diagram of a laser photovoltaic cell array assembly according to the present invention;
FIG. 2 is a schematic diagram of a laser photovoltaic cell array switch matrix according to the present invention;
FIG. 3 is a block diagram of the intelligent reconfigurable laser cell panel of the present invention;
FIG. 4 is a flow chart of the reconstruction algorithm design of the present invention;
wherein: 1. a structural frame; 2. a PCB substrate; 3. a photovoltaic cell sheet; 4. a sensor; 5. and a beacon light.
Detailed Description
In order to make the technical solution of the present invention more clear and definite for those skilled in the art, the technical solution of the present invention is described in detail below with reference to the accompanying drawings, but the embodiments of the present invention are not limited thereto.
An intelligent reconfigurable photovoltaic panel suitable for laser wireless energy transmission, comprising:
step one, constructing a photocell array, wherein the photocell array comprises photocell sheets 3, sensors 4, beacon lamps 5, a PCB (printed circuit board) substrate 2 and a structure frame 1 as shown in figure 1; the photocell sheet 3 is a laser cell sheet 3 (GaAs at 800nm band and InGaAs at 1064nm band) corresponding to the wavelength response of laser, and the photocell array is composed of 24 packaged single photocells. The sensor 4 comprises a photoelectric detector and a temperature sensor 4, wherein the photoelectric detector selects a PIN photodiode to carry out laser detection on a target; the temperature sensor 4 is a thermistor sensor 4 for monitoring the temperature of the photovoltaic cell panel. The beacon light 5 selects a band LD with 808nm as identification and tracking indicating light of a target at a transmitting end of the laser wireless energy transmission system.
In the first step, the photocell array is formed by m × n pieces into a circle or a square, the photocells are labeled as b11, b12 and … bmn, and the sensor 4 is labeled as S1, S2 and … Si according to the same rule.
The photovoltaic cells 4 × 6 (24) form a photovoltaic cell array (the array configuration is not limited to circular, square, etc.) with approximately circular distribution through the PCB substrate 2, the photovoltaic cells 3 are interconnected through a switch matrix as shown in fig. 2, the number of the arranged photovoltaic sensors 4 can be flexibly set (the light intensity distribution of target light spots can be reflected as much as possible), 25 photovoltaic sensors 4 are arranged in the embodiment, and the specific arrangement mode is shown in fig. 1.
Step two, constructing an intelligent reconfigurable laser cell panel, as shown in fig. 3, which comprises a photovoltaic cell panel array, a data acquisition module, a switch matrix and an intelligent processing controller, wherein the data acquisition module is responsible for acquiring voltage and current signals of a photovoltaic cell sheet 3 and a sensor 4 of the photovoltaic cell array and transmitting the acquired voltage and current signals of the photovoltaic cell sheet and the sensor 4 to the intelligent processing controller for processing; the switch matrix completes the recombination of the photocell array mainly according to the control instruction of the intelligent processing controller; the intelligent processing controller analyzes the photocell array data (photocell voltage, photocell current and sensor 4 information) acquired by the acquisition module, and gives a serial-parallel configuration scheme of the photocell array by using an array reconstruction algorithm;
step three, calculating the light intensity distribution of the target laser battery plate;
the photocell satisfies the relation (1) obtained from kirchhoff's law according to the equivalent circuit of the photocell, wherein I0Diode saturation current, I is laser battery output current, U is laser battery output voltage, q is an electronic charge constant, K is a Boltzmann constant, A is a diode characteristic factor, T is a thermodynamic temperature, R is a thermal coefficient, ands、Rprepresenting the equivalent series and parallel resistances of the photovoltaic cells, respectively:
in the formula IphThe photo-generated current of the photovoltaic cell is determined by illumination and temperature:
wherein VocIs the open circuit voltage of the photovoltaic cell, and α is the photovoltaic cell diode characteristic factor;
because the photo-generated current value of the photocell is in direct proportion to the illumination intensity of incident light, let beta be the illumination intensity and light
The proportionality constant between the generated currents and the illumination intensity P of the photocell are as follows:
the voltage and current values of the photocell can be seen from the formula (3) to reflect the illumination intensity of the photocell under illumination;
adopt the wavelength to be 808 nm's semiconductor laser, shine the photocell board after the collimation of emission optical system expands, gather output voltage, the electric current of photocell array through data acquisition module and be:
the photoelectric sensor 4 outputs a current of (I)S1,IS2,IS3…IS25) The formula (3) shows that the illumination intensity of the photocell plate corresponding to the photocell array is
Meanwhile, the output current distribution of the photoelectric sensor 4 can be utilized to obtain the light intensity distribution of the photocell plate by an inversion algorithm, and the average value is obtained through multiple times of collection
According to the illumination intensity distribution of the photocell array and the current distribution of the photoelectric sensor 4, the energy distribution of the irradiation light spots of the photocell plate can be obtained through inversion.
Step four, constructing an intelligent reconfigurable control algorithm. In order to reduce the times of switch adjustment during the reconstruction of the photovoltaic cell array, an optimized and improved BP neural network model is adopted to construct a reconstruction algorithm based on the neural network model, and the algorithm flow is shown in FIG. 4. Firstly, data acquisition is carried out on information such as working voltage, working current and the like of the photovoltaic cell panel array assembly, the light intensity distribution condition of the illuminated photovoltaic cell panel is obtained by utilizing the calculation in the third step and is used as the input of a light intensity distribution tolerance model, and a judgment result is output after the error analysis and judgment of the model. In this embodiment, the cell panel array is divided into four regions according to the illumination intensity, so as to obtain a 4 × 6 matrix
Namely, the photovoltaic cell panel array is configured according to a scheme that 4 strings are connected in parallel, and each 1 string is formed by connecting 6 cell sheets in series.
While the invention has been described with respect to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (4)
1. An intelligent reconfigurable photovoltaic panel suitable for laser wireless energy transmission, comprising:
the method comprises the following steps of firstly, constructing a photocell array, wherein the photocell array comprises photocell sheets, sensors, beacon lamps, a PCB (printed circuit board) substrate and a structural frame;
step two, constructing an intelligent reconfigurable laser cell panel, which comprises a photovoltaic cell panel array, a data acquisition module, a switch matrix and an intelligent processing controller, wherein the data acquisition module is responsible for acquiring voltage and current signals of photovoltaic cells and sensors of the photovoltaic cell array and transmitting the acquired voltage and current signals of the photovoltaic cells and the sensors to the intelligent processing controller for processing; the switch matrix completes the recombination of the photocell array mainly according to the control instruction of the intelligent processing controller; the intelligent processing controller analyzes the photocell array data acquired by the acquisition module and provides a serial-parallel configuration scheme of the photocell array by using an array reconstruction algorithm;
step three, calculating the light intensity distribution of the target laser battery plate;
and step four, constructing an intelligent reconfigurable control algorithm.
2. The intelligent reconfigurable photovoltaic panel suitable for the wireless energy transmission of the laser according to claim 1, wherein in the first step, the photovoltaic cell array is formed by m x n sheets into a circle or a square, the photovoltaic cells are labeled b11, b12 and … bmn, and the sensors are labeled S1, S2 and … Si according to the same rule.
3. The intelligent reconfigurable photovoltaic cell panel suitable for the wireless energy transmission of laser according to claim 2, wherein in step three, the photovoltaic cells satisfy the relation (1) obtained from kirchhoff's law according to their equivalent circuits, where I0Diode saturation current, I is laser battery output current, U is laser battery output voltage, q is an electronic charge constant, K is a Boltzmann constant, A is a diode characteristic factor, T is a thermodynamic temperature, R is a thermal coefficient, ands、Rprepresenting the equivalent series and parallel resistances of the photovoltaic cells, respectively:
in the formula IphThe photo-generated current of the photovoltaic cell is determined by illumination and temperature:
wherein VocIs the open circuit voltage of the photovoltaic cell, and α is the photovoltaic cell diode characteristic factor;
because the photo-generated current value of the photocell is in direct proportion to the illumination intensity of incident light, beta is a proportionality constant between the illumination intensity and the photo-generated current, and the illumination intensity P of the photocell is as follows:
the voltage and current values of the photocell can be seen from the formula (3) to reflect the illumination intensity of the photocell under illumination;
adopt the wavelength to be 808 nm's semiconductor laser, shine the photocell board after the collimation of emission optical system expands, gather output voltage, the electric current of photocell array through data acquisition module and be:
the output current of the photoelectric sensor is (I)S1,IS2,IS3…IS25) The formula (3) shows that the illumination intensity of the photocell plate corresponding to the photocell array is
Taking an average value through multiple acquisition
According to the illumination intensity distribution of the photocell array and the current distribution of the photoelectric sensor, the energy distribution of the irradiation light spots of the photocell plate can be obtained through inversion.
4. The intelligent reconfigurable photovoltaic cell panel suitable for laser wireless energy transmission according to claim 3, wherein in the fourth step, data acquisition is first performed on the information of the working voltage and the working current of the photovoltaic cell panel array assembly, the light intensity distribution condition of the illuminated photovoltaic cell panel is obtained by calculation in the third step and is used as the input of a light intensity distribution tolerance model, and the optimal configuration scheme of the photovoltaic cell array is given by outputting the judgment result through the error analysis and judgment of the model.
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