Solar cell image acquisition structure

Abstract

The invention relates to a solar cell image acquisition structure, belongs to the technical field of solar cell visual inspection, and solves the problem that the illumination of the cell is uneven, the darkroom is difficult to operate and the adjustment effect is difficult to reset. The technical solution is that a diffusion plate, a light source bracket and a camera bracket are installed on thewhole bracket and have positions adjustable according to needs, the diffusion plate increases the angle adjustment and realizes balanced illumination with the light source such that the acquired imageis more highly restored, the scale of the lifting slide is used to precisely adjust the effect of the camera and the light source on image acquisition to facilitate the resetting of adjustment effect, and the telescopic plate is adhered between the light source bracket and the camera bracket to form a darkroom cavity to ensure stable light between the camera and the light source. The solar cell image acquisition structure can be easily disassembled and installed, and is convenient for the operator to operate in real time.

Description

technical field [0001] The invention relates to the technical field of solar cell visual inspection, and more specifically, it relates to a solar cell image acquisition structure. Background technique [0002] During the production and transmission of solar cells, various product defects such as color differences, damage, and slurry leakage will occur in the cells. The traditional method is to sort the cells by manual visual inspection, which is inefficient and difficult to sort. Standards vary from person to person. The addition of machine vision methods allows this detection process to be completed by computer, but all visual detection methods rely on the imaging effect of the camera, so an appropriate imaging structure is required. The Chinese invention patent (authorized announcement number of an image acquisition device for liquid crystal display visual inspection: CN 102393577B) proposes an automatically controlled horizontal and vertical movement structure, which con...

AI Technical Summary

Problems solved by technology

[0002] During the production and transmission of solar cells, various product defects such as color differences, damage, and slurry leakage will occur in the cells. The traditional method is to sort the cells by manual visual inspection, which is inefficient and difficult to sort. Standards vary from person to person

The addition of machine vision methods allows this detection process to be completed by computer, but all visual detection methods rely on the imaging effect of the camera, so an appropriate imaging structure is required

The Chinese invention patent (authorized announcement number of an image acquisition device for liquid crystal display visual inspection: CN 102393577B) proposes an automatically controlled horizontal and vertical movement structure, which controls the camera to automatically complete the imaging of larger objects, but The adjustment direction can only achieve two degrees of freedom, horizontal and vertical, and cannot be adjusted manually. In addition, the structure has no darkroom and diffuse reflection structure, so it is difficult to avoid uneven illumination caused by reflection problems and light leakage problems during the photographing process. This structure is suitable for Shooting larger LCD screens is not suitable for smooth solar cells; Sun Zhiquan, Zhou Qi, Chen Zhen et al. "Design of solar cell defect detection system based on CMOS image sensor [J]" (Instrument Technology and Sensors. 2018.1: 60-63) proposed a box-shaped imaging structure, ignoring the reflective effect of the cell. When the light shines on the cell to form a reflective point, there will be a spot in the imaging result that affects the visual detection, and the light on the cell The uneven reflection will also distort the color in the imaging effect, and the color cannot be sorted by visual inspection; the Chinese invention patent (silicon crystal battery blue film detection system and its image acquisition device, application publication number: CN 108447798A) is in the former The structure is equipped with a rotation axis that can adjust the angle of the camera and the light source. This method can adjust the camera and light source to reduce the reflection of the cell, so that the light is as uniform as possible, but it still cannot eliminate the impact of the reflection on the imaging effect; at the same time, Multiple adjustable rotation axes have no scale indication, and it is difficult to restore the previous position after each manual adjustment, and the entire structure and cell transmission are wrapped in a dark room, which is difficult to install and difficult to manually observe during assembly line transmission

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