输电导线脱冰振动测量双目视觉方法

Vibration Measurement of Ice-shedding from Wire Lines Based on Binocular Vision Method

导线脱冰跳跃将导致导线之间的空气间隙减小,进而导致相间闪络和结构损坏.针对输电线路导线脱冰引起的导线振动问题,以立体视觉理论为基础建立了导线成像几何关系,并应用双目视觉原理建立了导线三维坐标测量的数学模型.经标准长度的双目视觉系统标定方法求解导线测量数学模型,恢复了导线三维几何信息.在试验检测中,建立了双目视觉测量系统,完成了导线脱冰振动的位移测量.测量结果证明了采用双目视觉原理检测输电导线脱冰位移的可行性.

Ice-shedding of transmission lines often causes violent vibration in power system,and makes the lines jumping up and down,which will generally reduces the phase-to-phase clearance,even leads to inter phase flashover and the destruction of structure.Aiming at the problems caused by ice-shedding of wire lines in measuring the vibration,a sensing method on binocular vision theory is presented,and a wire mathematical model of three-dimensional coordinate measurement is established by applying the principle.The binocular vision system calibration method based on standard-length is used to solve the mathematical model and the three-dimensional geometric information has been restored.In the experiment,the binocular vision measurement system is established and the results indicate that the measuring system is both simple in structure and convenient for the vibration measurement of the wire lines ice-shedding.