输电线路雷达防外力破坏的在线监测

摘要

Facing with some potential problems of external damage on the transmission lines such as cranes and theft ,an on-line monitoring system against external damage based on the ra-dar and video is put forward .According to the working principle of radar sensor ,the methods of measuring velocity and distance and detection angle ,the back-end hardware circuit ,software flow and the installation angle are designed .Then taking the classical spectrum estimation method based on the fast Fourier transform as the core algorithm ,the speed of operation is greatly improved .In addition ,the monitoring system has realized the calculation of detection distance ,speed and other information and the detection of the objects that invade the surround-ing area of the transmission lines .By building the experiment platform ,compared with actual data ,the measured data is almost consistent with the actual data ,which verifies the reliability and practicability of the device .%针对输电线路吊车碰线、盗窃等潜在的外力破坏，研究了基于雷达加视频的防外力破坏在线监测系统。根据雷达传感器的工作原理、测速测距方法以及探测角度，设计了后端硬件电路、软件流程以及安装角度；以快速傅里叶变换的经典频谱估计法为核心算法，提高运算速度。该监测系统实现了输电线路周围区域侵入物体存在性的探测以及距离、速度等信息的计算。通过所搭建的实验平台，利用系统测得物体的速度、距离的数据跟实际数据几乎一致，验证了装置的可靠性和实用性。