Considering the shortcomings of the traditional security technology system, such as poor stability, limited installation environment, high false alarm and missing report rate, this paper proposes a hanging fiber detector and video monitor system for perimeter security based on Michelson Interference Technology, and carries out functional test in the oil terminal of Petrochina Company Limited. In this system, an ordinary single-mode communication optical cable is arranged along the top of the fence in wavy shape. When the intruder climbs or turns over the fence, the system triggers the alarm event and emits an alarm. Then the high-speed dome camera will be controlled to turn and shoot the location of the invasion through the network video recorder and network switch. In the functional test, the system has realized climbing alarm, knocking the wall alarm, multi-point simultaneous intrusion alarm, false alarm learning, broken fiber alarm and other functions, which has better sensitivity, lower false alarm rate and better learning function compared with the products based on Sagnac principle and double MZ principle.
Oil storage tank is an important facility for oil production and refining. This paper presents a fire monitoring system for oil storage tank based on distributed optical fiber temperature sensing system(DTS), and demonstrates the laying method for both routing fiber and temperature sensing fiber. This system can realize real-time distributed temperature monitoring on the perimeter of secondary sealing ring of oil storage tank and has various alarm mechanisms. The system has been installed and tested in Shikong oil transportation station of China National Petroleum Corporation(CNPC) in Gansu, China. Through the actual test results, the feasibility and advantages of the distributed optical fiber temperature measurement for oil storage tank are verified and the temperature accuracy of the system is better than 1°C.
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