| 李帅永,毛维培,程振华,夏传强.基于广义互相关的供水管道泄漏振动信号时延估计器性能研究[J].电子测量与仪器学报,2021,35(2):202-211 |
| 基于广义互相关的供水管道泄漏振动信号时延估计器性能研究 |
| Research on time delay estimator of leakage induced vibration signal in water supply pipelines based on generalized cross correlation |
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| DOI： |
| 中文关键词: 时延估计器 信噪比 供水管道 泄漏定位 |
| 英文关键词:time delay estimator signal to noise ratio water supply pipelines leak location |
| 基金项目:国家自然科学基金(61703066)、重庆市基础研究与前沿探索项目(cstc2018jcyjAX0536)、重庆市技术创新与应用发展专项(cstc2019jscx fxydX0042, cstc2019jscx zdztzxX0053)资助 |
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| Author | Institution |
| Li Shuaiyong | Key Laboratory of Industrial Internet of Things & Networked Control, Ministry of Education,Chongqing University of Posts and Telecommunications, Chongqing 400065, China |
| Mao Weipei | Key Laboratory of Industrial Internet of Things & Networked Control, Ministry of Education,Chongqing University of Posts and Telecommunications, Chongqing 400066, China |
| Cheng Zhenhua | Key Laboratory of Industrial Internet of Things & Networked Control, Ministry of Education,Chongqing University of Posts and Telecommunications, Chongqing 400067, China |
| Xia Chuanqiang | Key Laboratory of Industrial Internet of Things & Networked Control, Ministry of Education,Chongqing University of Posts and Telecommunications, Chongqing 400068, China |
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| 中文摘要: |
| 针对供水管道泄漏振动信号低信噪比下时延估计器性能差的问题，利用仿真分析与实验验证相结合的方法，对互相关（CC），脉冲响应（ROTH）、平滑相干变换（SCOT）、维纳（WIENER）、相位变换（PHAT）和最大似然（ML）这6种时延估计器在供水管网泄漏声振动信号下的性能进行研究。首先，在不同噪声类型下分别研究了6种时延估计器随着信噪比的变化规律；然后，分析了不同信噪比下时延计器的噪声抑制性能；最后，将6种时延估计器应用于供水管道泄漏定位实验中，分析不同时延估计器产生的泄漏定位相对误差来比较他们的噪声抑制性能。仿真分析和实验验证表明，SCOT时延估计器在噪声抑制方面性能最优，基于SCOT时延估计器的供水管道泄漏平均相对定位误差为348%，Wiener时延估计器性能最差，平均相对定位误差为1823%。 |
| 英文摘要: |
| Aiming at the poor performance of time delay estimator (TDE) under low signal to noise ratio (SNR) of leakage induced vibration signal in water supply pipelines, the performance of six TDE (cross correlation, ROTH, SCOT, WIENER, PHAT and ML) for water supply pipelines leakage induced vibration signal was studied by combining simulation analysis with experimental verification. Firstly, the variation rule of six TDE with SNR is studied under different noise types. Then, the noise suppression performance of the TDE under different SNR is analyzed. Finally, six TDE are applied in leak location experiments of water supply pipelines to analyze the relative errors of leak location caused by different TDE to compare their noise suppression performance. Simulation analysis and experimental verification show, the SCOT has the best performance in noise suppression and the average relative error of SCOT based leak location in water supply pipelines is 348%, the Wiener has the worst performance and the average relative leak location error is 1823%. |
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