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[1]周颖涛,周绍骑,晁文胜,等.基于HHT时-频熵的声发射管道泄漏诊断[J].油气储运,2016,35(3):250-253,258.[doi:10.6047/j.issn.1000-8241.2016.03.004]
　ZHOU Yingtao,ZHOU Shaoqi,CHAO Wensheng,et al.Acoustic emission pipeline leakage diagnosis based on time-frequency entropy of HHT[J].Oil & Gas Storage and Transportation,2016,35(3):250-253,258.[doi:10.6047/j.issn.1000-8241.2016.03.004]
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基于HHT时-频熵的声发射管道泄漏诊断

《油气储运》[ISSN:1000-8241/CN:13-1093/TE] 卷: 35 期数: 2016年第3期 页码: 250-253,258 栏目: 出版日期: 2016-03-25
Title:

Acoustic emission pipeline leakage diagnosis based on time-frequency entropy of HHT

作者:

周颖涛1;  周绍骑1;  晁文胜2;  张少波3

1. 中国人民解放军后勤工程学院军事供油工程系;
2. 68099 部队;
3. 78355 部队

Author(s):

ZHOU Yingtao1;  ZHOU Shaoqi1;  CHAO Wensheng2;  ZHANG Shaobo3

1. Department of Petroleum Supply Engineering, Logistical Engineering University of PLA;
2. The No. 68099th Troop of PLA;
3. The No. 78355th Troop of PLA

关键词:

时频熵; HHT 谱; 管道泄漏; 声发射

Keywords:

time-frequency entropy; HHT spectrum; pipeline leakage; acoustic emission

分类号:
TE973.6
DOI:
10.6047/j.issn.1000-8241.2016.03.004
摘要:

针对油库管道的泄漏诊断问题,利用管道泄漏声发射信号非平稳的特点,提出了基于HHT时-频熵的声发射管道泄漏诊断方法。该方法采用Hilbert-Huang 变换分析管壁声发射信号,求得信号的HHT 谱,将HHT 时-频平面划分为等面积的时-频块,运用信息熵的计算方法,求得时-频块内所包含能量的信息熵,通过对比信息熵的大小判断管道有无泄漏。采用3 组模拟信号作为仿真对象,求取HHT 时-频熵,其大小与理论分析相符,验证了该方法的有效性。用模拟管道进行输水实验,分别对距离泄漏孔2.0 m 和14.8 m 的管壁声发射信号进行分析,判断管道是否泄漏,实验表明该方法可以准确诊断管道有无泄漏。

Abstract:

In order to detect the leakage of pipeline within tankfarm, this paper puts forward an acoustic emission pipeline leakage diagnosis technique based on time-frequency entropy of HHT, considering the instability of acoustic emission signal from the leakage of pipeline. This technique adopts Hilbert-Huang Transform to analyze the acoustic emission signal of pipe wall and then obtain the HHT spectrum of signal. The HHT time-frequency plane is divided into equal area timefrequency blocks, with the calculation method of information entropy, the information entropy of the energy contained in each time-frequency block is obtained. Then, the information entropies are compared to define whether there is leakage in pipeline. Three sets of analog signal are regarded as the simulation object to calculate the time-frequency entropy of HHT. The obtained value agrees with the theoretical analysis, which verifies the effectiveness of this technique. Simulated pipeline is used for water transportation experiment. The AE signals of pipelines with a distance of 2.0 m and 14.8 m from leakage are analyzed to determine leakage. Experimental results show that this technique can accurately detect pipeline leakage.

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相似文献/References:

[1]周颖涛　周绍骑　晁文胜　张少波.基于 HHT 时-频熵的声发射管道泄漏诊断[J].油气储运,2016,35(预出版):1.
　ZHOU Yingtao,ZHOU Shaoqi,CHAO Wensheng,et al.Acoustic emission pipeline leakage diagnosis based on time-frequency entropy of HHT[J].Oil & Gas Storage and Transportation,2016,35(3):1.

备注/Memo

收稿日期:2014-12-21;改回日期:2015-5-14。
作者简介:周颖涛,男,在读硕士生,1988 年生,2011 年毕业于中国人民解放军后勤工程学院油料储运自动化专业,现主要从事油气储运及自动化方向的研究。地址:重庆市沙坪坝区大学城,401311。电话:023-86736516,Email:airazor@qq.com

更新日期/Last Update: 1900-01-01