SF<sub>6</sub>断路器气体压力表智能遥视研究

张长胜; 冯广; 刘子裕; 李川; 钱斌

光学技术, 2017, 43 (1): 66, 网络出版: 2017-02-23

SF₆断路器气体压力表智能遥视研究

Study　of intelligent remote viewing for SF₆ circuit breaker gas pressure gauge

论文大纲

张长胜 ^1,*冯广 ¹刘子裕 ²李川 ¹钱斌 ¹

作者单位

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

SF6气压智能遥视 Otsu阈值分割 Hough变换 SF6 circuit breaker intelligent remote viewing Otsu threshold segmentation Hough transform

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SF6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。

Abstract

The SF6 circuit breaker dial image is used as object studied. The improved Otsu threshold segmentation algorithm 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 viewing 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.

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张长胜, 冯广, 刘子裕, 李川, 钱斌. SF₆断路器气体压力表智能遥视研究[J]. 光学技术, 2017, 43(1): 66. ZHANG Changsheng, FENG Guang, LIU Ziyu, LI Chuan, QIAN Bin. Study　of intelligent remote viewing for SF₆ circuit breaker gas pressure gauge[J]. Optical Technique, 2017, 43(1): 66.

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