To preserve the transmission line from frequent tripping accidents caused by external damage

an intelligent early-warning system was designed and implemented. TI-TMS320DM6446 was taken as its processor

combining with a peripheral module and a visual monitoring device. The Gaussian mixed model（GMM）

the background subtraction method and the MER method were used for moving target detection and identification

and the early warning information was hence given at the same time. Field test demonstrated the remarkable effectiveness and real-time performance of the system in preserving transmission line from external damage.