Abstract: Quality inspection plays an important role in the process of silicon solar cell production. Based on the characteristics of silicon solar cell, a visual inspection method for silicon solar cell was proposed. Shape dimension was measured by line and circle fitting and based on which outline edge defect was implemented by calculating the distance from the edge points to fitting lines and circles. Since the surface texture structure is more complicated after screen printing, a multi-template matching method combined with image subtraction was adopted to detect the defects of screen printing. The experimental results show that the silicon solar cell inspection method is stable, reliable and of high precision, which achieves a rapid and effective silicon solar cell inspection.

Key words: photovoltaic industry, silicon solar cell, defect detection, finger

摘要： 硅太阳能电池生产过程中的检测是一个重要的环节，针对硅太阳能电池片的特点，提出了一种基于视觉检测的硅太阳能电池检测方法。通过拟合直线和圆进行外形尺寸的测量，并在此基础上通过计算边缘点到拟合直线或圆弧的距离进行外形破损检测。针对丝印后电池表面纹理结构比较复杂的特点，采用多模板匹配并结合差影的方法进行丝印缺陷检测。实验结果表明：提出的方法具有稳定、可靠和精度高等特点，达到了快速、有效地实现硅太阳能电池缺陷检测的目的。

关键词: 光伏产业, 硅太阳能电池, 缺陷检测, 栅线