CCD Automatic Gain Algorithm Design of Noncontact Measurement System Based on High-speed Circuit Breaker

Abstract

High-speed breaker is an important device to protect circuit in electric power system. When any malfunction occurs on high-speed breaker, it may cause major power grid accident and lead to serious economic loss. Therefore, it contains important technical significance and economic significance in timely understanding the working performance of breaker and implementing scientific condition-based maintenance. Optical noncontact measurement scheme is mainly composed of six parts: target object, LED light source, lens, line laser, linear CCD, and terminal process equipment. However, as breakers are commonly placed in complex environment, the illumination quality on the spot cannot be guaranteed. Optical system of the entire system needs to implement self-adaptation according to the environmental illumination at the site. Based on the situation, this paper designed an automatic gain algorithm to make linear CCD able to adjust gain in accordance with environment, so as to obtain high-quality images.