Flexible circuit boards, also known as flexible circuit boards and flexible circuit boards, are favored for their excellent characteristics such as light weight, thin thickness, and free bending and folding... However, the quality inspection of FPC in China mainly relies on manual visual inspection. High cost and low efficiency. With the rapid development of the electronics industry, the design of circuit boards is becoming more and more high-precision and high-density, and the traditional manual detection methods have been unable to meet the production needs. FPC defect automatic detection has become an inevitable trend of industrial development.