关键词: 输电线路, 压缩感知, 在线监测, 梯度投影

Abstract:

One of the most important ways to discover the dangerous points of transmission lines and monitor surrounding weather conditions is the condition monitoring of transmission lines.Since transmission lines run across fields and maintains,only hand communication mode can be adopted to transfer video surveillance imagery in the area not covered by communications networks.In order to meet the bandwidth constraint,the compressed sensing method is introduced to perform compression and transmission on surveillance imagery.In addition,according to the characteristics of DSP memory's limitation,surveillance imagery is divided first and then compressed again for reducing the memory of image compression.Therefore,based on signal received from monitoring host side,the gradient project algorithm is applied to reconstruct surveillance imagery for the operating crew to get comprehensive understanding of the line's dangerous points in surveillance center and take measures to reduce accidents to manageable proportions.

Key words: transmission line;compressed sensing;online monitor;gradient projection