Sun Pingling, Gao Yan, Jin Boao, Brennan Michael J
Key Laboratory of Noise and Vibration Research, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China.
University of Chinese Academy of Sciences, Beijing 100049, China.
Sensors (Basel). 2020 Jan 27;20(3):692. doi: 10.3390/s20030692.
The detection and location of pipeline leakage can be deduced from the time difference between the arrival leak signals measured by sensors placed at the pipe access points on either side of a suspected leak. Progress has been made in this area to offer a potential improvement over the conventional cross-correlation method for time delay estimation. This paper is concerned with identifying suitable sensors that can be easily deployed to monitor the pipe vibration due to the propagation of leak noise along the pipeline. In response to this, based on the low-frequency propagation characteristics of leak noise in our previous study, polyvinylidene fluoride (PVDF) wire sensors are proposed as a potential solution to detect the pipeline leak signals. Experimental investigations were carried out at a leak detection pipe rig built in the Chinese Academy of Sciences. Their performances for leak detection were shown in comparison with hydrophones. It is suggested that with special considerations given to aspects pertaining to non-intrusive deployment and low cost, the PVDF wire sensors are of particular interest and may lead to a promising replacement for commercial leak noise transducers.
管道泄漏的检测和定位可以通过位于疑似泄漏点两侧管道接入点处的传感器测量到的泄漏信号到达时间差来推断。在该领域已经取得了进展，有望在传统的互相关方法用于时延估计方面实现潜在改进。本文关注的是识别合适的传感器，这些传感器能够轻松部署，以监测由于泄漏噪声沿管道传播而引起的管道振动。对此，基于我们之前研究中泄漏噪声的低频传播特性，提出将聚偏二氟乙烯（PVDF）线传感器作为检测管道泄漏信号的潜在解决方案。在中国科学院建造的一个泄漏检测管道试验台上进行了实验研究。与水听器相比，展示了它们的泄漏检测性能。结果表明，考虑到与非侵入式部署和低成本相关的方面，PVDF线传感器特别值得关注，并且可能有望替代商业泄漏噪声传感器。
