介绍了一种新的电缆扰动监测系统,解决了传统电网舞动检测器在面对电磁干扰和持续供电问题时的问题.该系统采用双端M-Z光路结构,能够实时定位舞动位置,而检测器采用薄壁增敏电缆套筒构建,经过有限元分析得出其固有频率为106.77 Hz,与实验数据仅有1.65％的误差.实验结果显示,该检测器在0～140 Hz范围内的相对灵敏度为41.25～66.78 dB re rad/g,对舞动信号的检测灵敏度高.
Research on Distributed Fiber Optic Cable Disturbance Detection Device Based on Machzender
In this paper,an innovative optical fiber cable disturbance monitoring system is introduced,which successfully solves the dilemma of the traditional electric network wave detector in the face of electromagnetic interference and continu-ous power supply.The system adopts a double-ended M-Z optical path structure,which can locate the dance position in re-al time,and the detector is constructed with a thin-wall sensitized cable sleeve.The finite element analysis shows that its natural frequency is 106.77 Hz,which is only 1.65％ error with the experimental data.The experimental results show that the relative sensitivity of the detector is 41.25～66.78 dB re rad/g in the range of 0～140 Hz,which confirms its high sen-sitivity to the detection of dancing signals.
M-Z interferometerthin-walled sensitized cable sleevefinite element analysisgeophone
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