应用模糊熵和相似度的管道泄漏检测与定位

刘炜; 刘宏昭

doi:10.13433/j.cnki.1003-8728.2016.0320

应用模糊熵和相似度的管道泄漏检测与定位

doi: 10.13433/j.cnki.1003-8728.2016.0320

刘炜^1,2,
刘宏昭^1, ,

1.
西安理工大学机械与精密仪器工程学院, 西安 710048;
2.
陕西学前师范学院计算机与电子信息系, 西安 710100

基金项目:

国家自然科学基金项目(51275404)资助

详细信息

作者简介:
刘炜(1976-),讲师,博士研究生,研究方向为计算机应用和仪器检测技术,yoyotianxia@163.com

通讯作者:
刘宏昭,教授,博士,liu-hongzhao@163.com

计量
- 文章访问数: 247
- HTML全文浏览量: 44
- PDF下载量: 6
- 被引次数: 0
出版历程
- 收稿日期: 2015-08-10
- 刊出日期: 2016-03-05

Applying Fuzzy Entropy and Similarity Dgree to Detecting and Locating Pipeline Leakage

Liu Wei^1,2,
Liu Hongzhao^{1
, ,}

1.
School of Mechanical and Precision Instrument Engineering, Xi'an University of Technology, Xi'an 710048, China;
2.
Department of Computer Science and Electronic Information, Shaanxi Xueqian Normal University, Xi'an 710061, China

摘要

摘要: 动态压力波信号的异常识别是声波法输油管道泄漏检测和泄漏定位的关键。从时间序列角度出发,提出一种基于模糊集理论的输油管道泄漏检测定位方法。该方法首先采用小波分解和半硬软阈值法去除动态压力波信号噪声;其次选取固定长度的正常动态压力波信号子序列作为模板序列,并对现场采集所得动态压力波信号选取相同长度的子序列作为被匹配序列,构造两子序列信号所对应功率谱的模糊集并计算其相似度;最后根据模糊相似度判定输油管道是否存在泄漏现象,若发生泄漏,可利用检测信号和模板信号的模糊熵差确定泄漏位置。实验表明,建议方法简单、有效且定位精度高。
- 管道泄漏 /
- 动态压力波 /
- 滤波 /
- 异常检测 /
- 模糊集理论
Abstract: The recognition of abnormal dynamic pressure wave signal is key to pipeline leakage detection and location with acoustic wave. Starting from time sequence, we propose a petroleum pipeline leakage detection and location method based on the fuzzy set theory. Firstly, an adaptive filter is designed to remove the noise of a dynamic pressure wave signal with wavelet decomposition and semi-hard and soft threshold. Secondly, the fixed-length normal dynamic pressure wave signal sequences are selected as template sequences, and the dynamic pressure wave signals with the same-length sub-sequence collected on site are selected as matching sequences; then the fuzzy sets of two sub-sequence signals' power spectra are constructed to calculate their fuzzy similarity degrees. Finally, we use the fuzzy similarity degrees to judge if petroleum pipeline leakage occurs; if yes, we locate the leakage by using the fuzzy entropy difference between normal and collected dynamic pressure wave signal sequences of the petroleum pipeline. The experimental results show that our method is simple, effective and has high location accuracy.
- pipeline leakage /
- dynamic pressure wave /
- adaptive filter /
- leakage detection /
- fuzzy set theory

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参考文献(19)

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