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为了解决在周界安防系统中基于FBG振动传感器波分复用方式下传感单元数量受光源带宽和解调限制的问题,同时也为了延长周界安防距离、降低系统成本、提高系统效率,提出了“全同光纤布喇格光栅(FBG)振动传感器”的概念,论述了全同FBG振动传感器在周界安防系统中应用的可行性,设计了实验方案,搭建了试验装置并给出了实验结果。实验证明,两个波长基本相同的全同FBG振动传感器接入后的波长灵敏度会有不同程度的损失,实验中6种组合12种连接方式波长灵敏度大于20pm的有10种,实践证明,经过筛选可以达到实际应用的要求,全同FBG振动传感器在周界系统的应用不但可以提高系统的容量,而且使FBG周界系统的成本大大降低,更具市场竞争力。
In order to solve the problem that the sensing unit number is limited by the light source bandwidth and demodulation in the perimeter security system based on FBG vibration sensor WDM mode, in order to extend perimeter security distance, reduce system cost and improve system efficiency, The concept of “the same fiber Bragg grating (FBG) vibration sensor” was discussed, and the feasibility of using the same FBG vibration sensor in the perimeter security system was discussed. The experimental scheme was designed and the experimental device was set up. The experimental results. Experiments show that the same wavelength of the same wavelength after the same FBG vibration sensor access will have varying degrees of loss in the experiment 6 combinations of 12 kinds of connection wavelength sensitivity greater than 20pm 10 kinds of practice proved that after screening The application of the same FBG vibration sensor in the perimeter system can not only increase the capacity of the system, but also greatly reduce the cost of the FBG perimeter system and make it more market competitive.