The chemical plant belongs to the closed defense area of heavy industry, and can not effectively avoid the occurrence of accidents relying on the traditional patrol and camera monitoring; the problem needs to be solved urgently is wide range, many dead angles and passive personnel in the face of accidents; while the laser radar can protect the fence of the chemical plant to prevent the fence and foreign matters from accidentally falling into the chemical pool, which can meet the requirements of continuous real-time warning and real-time warning throughout the day Remote protection can reduce the loss of the factory and improve the safety of the area.