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Photovoltaic cell energy efficiency map compression measurement device and measurement method

A photovoltaic cell, compression measurement technology, applied in photovoltaic power generation, photovoltaic system monitoring, photovoltaic modules and other directions, can solve the problems of slow imaging speed of photovoltaic cell energy efficiency map, low measurement efficiency of photo-induced current method, etc., and achieve low noise level , the effect of fast speed and reduced complexity

Active Publication Date: 2019-09-10
XIDIAN UNIV
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Problems solved by technology

[0009] The purpose of the present invention is to provide a photovoltaic cell energy efficiency map compression measurement device and measurement method, which solves the problems of slow imaging speed of photovoltaic cell energy efficiency map and low measurement efficiency in the light-induced current method based on compressed sensing in the prior art

Method used

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  • Photovoltaic cell energy efficiency map compression measurement device and measurement method
  • Photovoltaic cell energy efficiency map compression measurement device and measurement method
  • Photovoltaic cell energy efficiency map compression measurement device and measurement method

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Embodiment

[0081] Step S1, collecting the image of the surface features of the solar panel and generating the final sequence of random projection patterns, such as figure 2 shown;

[0082] Step S11, the sample stage 1 to be tested moves the solar cell panel, so that the surface feature imaging module 3 is aligned with the solar cell panel, and evenly illuminates the area to be tested of the solar cell panel with the monochromatic light within the wavelength range absorbed by the solar cell panel;

[0083] Step S12, imaging the area to be tested with a visible light camera to generate a surface feature image;

[0084] In this embodiment, a solar panel with a length and width of 5.6mm is illuminated with 460nm blue light, and its low-distortion grayscale image is collected. The length and width of the image are 500 pixels, and the collected surface feature images are as follows image 3 shown;

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Abstract

The invention provides a photovoltaic cell energy efficiency map compression measuring device and measuring method. The photovoltaic cell energy efficiency map compression measuring device is composedof a sample table to be tested, a structured light projection module, a surface feature imaging module, a surface feature extraction module, a random pattern generation module, a projection pattern generation module, a current measurement module and a current map reconstruction module. A method for compress that energy efficiency diagram of photovoltaic cell utilizes the characteristic that the grid line of the photovoltaic cell and the surface characteristics of the photovoltaic material are different greatly, The image processing method is used to image the surface of the battery to be measured and extract the grid line information as the surface characteristic image, and the surface characteristic image is used to reduce the complexity of the photovoltaic cell energy efficiency map signal in the compression sensing model, so as to reduce the sampling rate and improve the measurement efficiency.

Description

technical field [0001] The invention belongs to the technical field of test and measurement, and in particular relates to a photovoltaic cell energy efficiency map compression measurement device and a measurement method. Background technique [0002] The photoelectric conversion effect of photovoltaic cells is the most potential solar-electric energy conversion method. However, surface defects such as cracks and cracks are easily introduced into photovoltaic cells during production, deployment, and use, which greatly reduces the quality and quality of photovoltaic cells. life. Efficient detection of surface defects of photovoltaic cells, screening and classification of photovoltaic cells, and re-cutting of residual pieces are necessary steps to improve product quality, consistency, and save costs. [0003] Since the output of photovoltaic cells is the integral of the entire light-receiving surface, which is the sum of the photoelectric output of each point, it is difficult ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02S50/10
CPCH02S50/10Y02E10/50
Inventor 权磊刘艳谢楷习若尧朱繁刘少伟
Owner XIDIAN UNIV
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