基于线阵相机的断路器分合闸速度测量系统

A switching speed measurement system for circuit breakers based on a linear array camera

针对目前测量断路器分合闸速度的装置大多存在准确度低、安装条件苛刻及无法实现实时在线监测的问题,提出一种全新的基于线阵相机的实时测量断路器分合闸速度的系统。首先搭建模拟断路器转动的实验台架进行实验技术研究,在电机输出端安装转盘模拟断路器执行机构的转轴,转盘一侧放置线阵相机拍摄转盘上设置的靶标的黑白窄条图像。然后通过选用合适的分辨率、曝光时间及判断阈值,实时分析线阵相机拍摄的图像变化,获得靶标的实时运动行程和转盘的转动速度,进而得到断路器分合闸速度,验证了测量方案的可行性。最后将其应用于试点变电站,实现了断路器分合闸运动行程的实时在线监测。与现有技术相比,本测量系统具有较高的图像处理速度,对分合闸速度的测量精确且稳定。

The present switching speed measurement devices for circuit breakers are mostly low in accuracy,severe on installation conditions,and cannot achieve real-time online monitoring.A new system for real-time switching speed measurement of circuit breakers based on a line array camera is proposed.First,the experimental technique is studied by building an experimental frame simulating the rotation of circuit breakers.A turntable is installed at the output of the motor to simulate the rotating shaft of the circuit breaker actuator,and a line array camera is placed on the turntable side to capture the black and white narrow strip images of the targets set on the turntable.Afterward,the appropriate resolution,exposure time and judgment threshold are chosen to analyze the changes of the images taken by the line array camera in real time to obtain the real-time motion travel of the target and the rotation speed of the turntable.The switching speed of the circuit breaker is obtained to verify the feasibility of the measurement scheme.Finally,it is applied to a pilot substation to monitor the motion travel of the switching of the circuit breaker in real time.Compared with the existing technology,this measurement system can process the images more quickly and measure the switching speed more precisely and stably.