Novel Negative Pressure Wave-Based Pipeline Leak Detection System Using Fiber Bragg Grating-Based Pressure Sensors
Novel Negative Pressure Wave-Based Pipeline Leak Detection System Using Fiber Bragg Grating-Based Pressure Sensors
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DOI：
10.1109/jlt.2016.2615468
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发表时间：
2017-08-15
影响因子：
4.7
通讯作者：
Grattan, Kenneth T. V.
中科院分区：
文献类型：
--
作者：
Wang, Jiqiang;Zhao, Lin;Grattan, Kenneth T. V.
本文报道了一种基于负压波（NPW）的管道泄漏检测系统的新颖设计和支撑技术原理，该系统使用光纤布拉格光栅（FBG）压力传感器进行配置。为了评估这一点，我们建立了管道泄漏测试平台并进行了实验，以验证使用这种基于光纤光栅的方法的系统的性能。结果表明，使用基于 FBG 的传感器的系统可以准确确定管道沿线的压力变化趋势，从而可以在线计算 NPW 速度。与传统的NPW检测技术进行了关键比较，表明新型检测系统能够实现更高的泄漏定位精度和更小的泄漏量的检测。这是因为基于 FBG 的系统能够允许更多数量的传感器沿管道复用。它们产生的相应输出信号显示出非常令人满意的高信噪比。该系统已经过评估，特别是其对外部信号的响应，因此可以消除由泵启动或停止引起的干扰。这是通过对多传感器阵列捕获的压力变化的时间序列进行分析来实现的，从而证明了对此类影响的免疫力。因此，该系统的设计旨在最大限度地减少误报发生的情况。
In this paper, the design and underpinning technical principles of the novel design of a negative pressure wave (NPW)-based pipeline leak detection system has been reported, which is configured using fiber Bragg grating (FBG) pressure sensors. To evaluate this, a pipeline leakage test platform has been established and experiments have been conducted, to verify the performance of a system using this FBG-based approach. The results show that a system using FBG-based sensors can accurately determine the pressure change trends along the pipeline and thus allow the calculation of the NPW velocity online. A key comparison is made with traditional NPW detection techniques, showing that the novel detection system is capable of achieving the higher leak-location accuracy and the detection of smaller leakage volumes. This arises from the ability of the FBG-based system to allow an increased number of sensors to be multiplexed along the pipeline. Their corresponding output signals generated show a very satisfactory, high signal-to-noise ratio. The system has been evaluated, especially in its response to extraneous signals and thus disturbances caused by the pump starting or stopping can be eliminated. This was achieved through an analysis of the time sequence of the pressure changes captured by the multisensor array being carried out and thus immunity to such effects demonstrated. The system has thus been designed to minimize the instances where a false alarm occurs.