Design of High Precision Lighting Control System for Machine Vision Image Acquisition

In this paper, a high precision lighting control system based on TPS92640 is proposed, which meet the requirements of image acquisition in light source. The whole system adopts modular design, including STM32 master module, human-computer interaction interface, light-driven module based on TPS92640, 485 communication module, CAN bus communication module, AD isolation voltage acquisition module. Each module is interrelated to achieve the adjustment of the light intelligently. The lighting strips consist of dense and ordered LED permutations. In theory, the control accuracy of the light drive module can reach 1/2000, but because of the project requirements we actually apply the accuracy of 1/100. After testing, the light intensity of the system is strong and uniform. It can greatly improve the quality of the image acquisition and conducive to follow-up image processing.