Real-Time Distributed Vibration Monitoring System Using Φ-OTDR
Real-Time Distributed Vibration Monitoring System Using Φ-OTDR
复制标题
使用 Ф-OTDR 的实时分布式振动监测系统
DOI：
10.1109/jsen.2016.2642221
复制
发表时间：
2017-03-01
影响因子：
4.3
通讯作者：
Bai, Qing
中科院分区：
文献类型：
--
作者：
Wang, Yu;Jin, Baoquan;Bai, Qing
本文的目的是理论分析和实验证明的分布式光纤传感器的研究相敏光时域反射计（Phi-OTDR）的实时振动监测与不同的信号处理方法。本文从两个方面对Phi-OTDR系统进行了研究：硬件参数和询问方案。首先讨论了进入传感光纤的脉冲光功率对Phi-OTDR的影响。然后，提出了两种应用于Phi-OTDR的基于差分法和Prewitt边缘检测法的系统，分别用于一维和二维振动定位。最后，采用基于FPGA的高速采集系统实现了三维实时振动监测。这种新型的分布式振动传感器可作为第三方入侵识别、管道监测、爆炸环境超声波检测的理想信号源。
The purpose of this paper is to theoretically analyze and experimentally demonstrate the investigation on a distributed optical fiber sensor based on phase-sensitive optical time domain reflectometry (Phi-OTDR) for real-time vibration monitoring with different signal processing methods. The Phi-OTDR system is investigated in two aspects: the hardware parameter and the interrogation scheme. The effect of pulsed light power that enters into the sensing fiber on Phi-OTDR is first discussed. Then, two systems based on the differential method and the Prewitt edge detection method applied for Phi-OTDR are presented for 1-D and 2-D vibration location, respectively. Finally, a high-speed acquisition system based on FPGA is applied to realize the 3-D real-time vibration monitoring. This new distributed vibration sensor can be used as an ideal source for the third-party intrusion identification, pipeline monitoring, and ultrasonic wave detection in explosive environment.