基于压缩感知的输电线路状态监视图像传输

Transmission of Transmission Line Monitoring Images Using Compressed Sensing

输电线路状态监测是发现输电线路危险点和监视周围气象条件的重要手段。输电线路穿行于野外,在通信网络覆盖之外的地域只能以手拉手方式传递视频监控画面,为满足现场带宽约束,引入压缩感知方法对监视画面进行压缩传输。另外针对DSP可用内存有限的特点,对监视画面进行分割后再行压缩,显著降低了图片压缩所需内存;在监视主机侧根据接收到的信号,利用梯度投影算法重构监视画面,使得运行人员在监控中心便可全面了解线路危险点的情况,及时采取措施将事故消灭在萌芽状态。

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 ar- ea 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 reduc- ing 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 under- standing of the line＇s dangerous points in surveillance center and take measures to reduce accidents to manageable proportions.