SF_6断路器气体压力表智能遥视研究  

Study of intelligent remote viewing for SF_6 circuit breaker gas pressure gauge

作　　者：张长胜[1] 冯广[1] 刘子裕 李川[1] 钱斌[1] ZHANG Changsheng FENG Guang LIU Ziyu LI Chuan QIAN Bin(Faculty of Information Engineering and Automation, Kunming University of Science and Technology, Kunming 650500, China China Energy Engineering Group Yunnan Electric Power Design Institute Co. , Ltd, Kunming 650051, China)

机构地区：[1]昆明理工大学信息工程与自动化学院,昆明650500 [2]中国能源建设集团云南省电力设计院有限公司,昆明650051

出　　处：《光学技术》2017年第1期66-71,共6页Optical Technique

基　　金：云南省中青年学术和技术带头人后备人才项目(2012HB011);昆明理工大学学科方向建设研究项目(14078212)

摘　　要：以压力表盘图像为对象,通过一种改进的Otsu阈值分割算法,在离差平方和约束条件基础上区分整体阈值,确定适应度函数,以选取最佳阈值,可避免因单一法排除边缘和噪声区域而遗漏部分目标和背景像素;Hough变换通过直线提取法确定指针与圆提取法定圆取圆心相结合,依据表盘指针经圆心原理较准确定位指针位置,保证了表盘指针识别和数值读取精确度。实验结果表明该智能遥视系统能够实时监测SF_6断路器表盘气压值,给出的改进Otsu阈值分割算法能较准确分割目标区域,基于角度识别指针数值方法读取误差保持在3%范围内。The SF6 circuit breaker dial image is used as object studied. The improved Otsu threshold segmentation al- gorithm is used, which selects the best threshold value by redistributing the overall threshold and combining with the square sum of deviations regarded as the fitness function so that part of the target and background pixels can be not missed. Hough transform can accurately locate at the pointer position through the method of combining pointer identified and straight line extraction method with circle recognized by circle extraction method and the principle of the circle on dial pointer, which ensures precision of reading pressure value. The experimentresult shows that the intelligent remote vie- wing system can provide a real-time and accurate monitoring on pressure value of SF6 circuit breaker dial, and that the improved Otsu threshold segmentation algorithm given can accurately segment the target area, and that the method based on the angle recognition pointer valuecan keep reading error at the range of three percent.

关 键 词：SF6气压 智能遥视 Otsu阈值分割 HOUGH变换 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]