The principle of distributed optical fiber sensing technology is to simultaneously use optical fibers as sensing sensitive elements and transmission signal media, adopt advanced distributed sensing principles, detect vibration signals at different positions along the optical fiber, and achieve truly distributed measurement. The intelligent fiber optic perimeter security system is a security prevention technology based on distributed fiber optic sensing technology. It is a modern defense system that uses high-tech technologies such as fiber optic sensing and optical communication to build a warning network or security alarm system. It monitors and alerts for emergencies that threaten public safety, and continuously monitors various vibrations that directly touch or are transmitted to vibrating fibers through load-bearing objects such as soil cover, wire mesh, fences, etc.

After laying sensing optical cables in areas that require security, disturbances and vibrations from the outside can be detected and sensed through the sensing optical cables. When these areas are subjected to abnormal intrusion and destruction by outsiders. The detection and signal processing subsystem can detect and perceive vibration signals, and after collecting, transmitting, analyzing, and processing these signals, determine whether they have been invaded. If it is determined that there is intrusion, the alarm area will be automatically displayed on the electronic map of the management host. Simultaneously issuing alarm signals to drive relevant sound, light, and broadcasting systems; Alternatively, the alarm information can be sent to the relevant personnel's mobile phones, and video surveillance can also be linked to switch the host display screen to the real-time scene on site.