| 基于EWT及互时频的天然气管道泄漏定位 |
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| 引用本文： | 肖启阳,李健,孙洁娣,曾周末,靳世久.基于EWT及互时频的天然气管道泄漏定位[J].仪器仪表学报,2016,37(12):2735-2742. |
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| 作者姓名： | 肖启阳 李健 孙洁娣 曾周末 靳世久 |
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| 作者单位： | 天津大学 精密测试技术与仪器国家重点实验室天津300072,天津大学 精密测试技术与仪器国家重点实验室天津300072,燕山大学信息科学与工程学院秦皇岛066004,天津大学 精密测试技术与仪器国家重点实验室天津300072,天津大学 精密测试技术与仪器国家重点实验室天津300072 |
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| 基金项目： | 博士学科点专项科研基金（20130032130001）、天津市科技兴海项目（KJXH201306）、天津市项目(14JCZDJC32300)、国家重点研发计划（2016YFC0802103）项目资助 |
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| 摘 要： | 针对天然气管道泄漏定位的问题,提出一种基于经验小波变换(EWT)及互时频的泄漏定位方法。该方法首先采用EWT对泄漏信号进行分解,获得多个分量,进而提出根据互信息的敏感分量自适应选择算法,获取敏感分量;然后采用互时频法对敏感分量进行时频分析,根据互时频图的最大特征峰值计算时延和相关频率;最后根据频散曲线获得相关声波速度,实现对天然气管道泄漏点定位。实验结果表明,该方法能够实现管道泄漏点定位,与基于EMD的互时频法相比,定位精度明显提高。
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| 关 键 词： | 泄漏定位 经验小波变换 互时频 时间差 频散曲线 |
Pipeline leak location based on EWT and CTFS |
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| Xiao Qiyang,Li Jian,Sun Jiedi,Zeng Zhoumo and Jin Shijiu.Pipeline leak location based on EWT and CTFS[J].Chinese Journal of Scientific Instrument,2016,37(12):2735-2742. |
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| Authors: | Xiao Qiyang Li Jian Sun Jiedi Zeng Zhoumo and Jin Shijiu |
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| Affiliation: | State Key Laboratory of Precision Measurement Technology and Instrument, Tianjin University, Tianjin 300072 China,State Key Laboratory of Precision Measurement Technology and Instrument, Tianjin University, Tianjin 300072 China,School of Information Science and Engineering, Yanshan University, QinHuangDao 066004,China,State Key Laboratory of Precision Measurement Technology and Instrument, Tianjin University, Tianjin 300072 China and State Key Laboratory of Precision Measurement Technology and Instrument, Tianjin University, Tianjin 300072 China |
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| Abstract: | Aiming at natural gas pipe leakage location problem, leak source location method based on empirical wavelet transform (EWT) and cross time frequency spectrum (CTFS) is proposed. Firstly, the EWT method was used to decompose the leakage signal, and an adaptive selection method using mutual information is proposed to process these mode components and obtain the sensitive components closely related to the leak. The sensitive components were processed by CTFSand obtain the delay and corresponding frequency information. The group velocity of wave speed was calculated according to the dispersive curve. Finally, the leakage location was finished. Experiment results demonstrate that the localization accuracy is apparently higher than that of the EMD CTFS method. |
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