中文摘要：

针对船舶管网弯曲多、噪音强、流体波动大的复杂环境要求,设计实现了基于直线型Sagnac光纤干涉仪的船舶管道泄漏检测系统.该系统基于消除零点频率盲区、避免零点频率重复、利于零点频率出现、防止噪声频率污染4要素,通过合理选取消盲光纤的长度的方式寻找光纤传感器最优区段作为监测仪传感器.同时,通过将电路、光路及探测器均集成到机箱内,实现了监测系统的仪器化设计.系统测试表明：该仪器能够实时、精确地检测到泄漏信号,有效解决船舶复杂管网监测问题.

英文摘要：

Bending, noise, fluid fluctuation are the main features of pipline in ship. Aiming at these problems, this paper proposed a ship pipeline leakage detection system using linear Sagnac optical fiber interferometer. This system designed a optical fiber sensor by selecting the length of eliminated blind optical fiber to find out the optimal optical fiber position. The design process of this system was based on four key elements： eliminating blind area of zero frequency, avoiding repeating zero frequency, easy to emerging of zero frequency, and preventing noise frequency pollution. Moreover, this paper integrated circuit, optical path and detector into monitor case, and made a detection system into instrument. Experiment results show that leak signal can be precisely detected by instrument in time. This monitor instrument can effectively solve how to detect the complexity ship pipline precisely in excellent stability.