基于Sagnac的干涉型光纤入侵报警系统的设计及应用

Design and Application of an Interferometer Optical Fiber Intrusion Alarm System Based on Sagnac

光纤入侵报警系统可对防区进行全天候、全方位实时监测。设计了一种基于Sagnac的干涉型光纤入侵报警系统,并对系统的响应特性进行了测试,结果表明入侵动作发生时,系统具有灵敏度高及快速响应特性。现场连续48小时监测到的传感系统时域波形说明,系统具有抗环境噪声干扰能力强、稳定性好、误报率低的特点,可广泛应用于各安防领域。

The fiber-optic intrusion alarm system can be used to monitor the defense area in a round-theclock and omni-directional way. In this paper, an interferometric fiber optic intrusion alarm system based on the Sagnac is designed, and response characteristics of the system tested. The test shows that the system has a higher sensitivity and fast response characteristics when the external intrusion occurs. The results based on 48 hours of continuous monitoring indicate that the system have strong ability to resist environmental noise, good stability, and low rate of false positive alarms. It can be widely used in the most security fields.