本文選題：泄漏定位　切入點(diǎn)：經(jīng)驗(yàn)小波變換　出處：《儀器儀表學(xué)報》2016年12期 　論文類型：期刊論文

【摘要】：針對天然氣管道泄漏定位的問題,提出一種基于經(jīng)驗(yàn)小波變換(EWT)及互時頻的泄漏定位方法。該方法首先采用EWT對泄漏信號進(jìn)行分解,獲得多個分量,進(jìn)而提出根據(jù)互信息的敏感分量自適應(yīng)選擇算法,獲取敏感分量;然后采用互時頻法對敏感分量進(jìn)行時頻分析,根據(jù)互時頻圖的最大特征峰值計(jì)算時延和相關(guān)頻率;最后根據(jù)頻散曲線獲得相關(guān)聲波速度,實(shí)現(xiàn)對天然氣管道泄漏點(diǎn)定位。實(shí)驗(yàn)結(jié)果表明,該方法能夠?qū)崿F(xiàn)管道泄漏點(diǎn)定位,與基于EMD的互時頻法相比,定位精度明顯提高。
[Abstract]:In order to solve the problem of leakage location in natural gas pipeline, a leakage location method based on empirical wavelet transform (EWT) and mutual time frequency is proposed. Firstly, EWT is used to decompose the leakage signal to obtain multiple components. Then an adaptive selection algorithm based on mutual information is proposed to obtain the sensitive component, and then the time-frequency analysis of the sensitive component is carried out by using the mutual time-frequency method, and the time delay and the correlation frequency are calculated according to the maximum characteristic peak value of the mutual time-frequency map. Finally, the correlation acoustic velocity is obtained according to the dispersion curve, and the location of leakage point in natural gas pipeline is realized. The experimental results show that this method can locate the leakage point of gas pipeline, and compared with the mutual time-frequency method based on EMD, the accuracy of the location is improved obviously.
【作者單位】： 天津大學(xué)精密測試技術(shù)與儀器國家重點(diǎn)實(shí)驗(yàn)室;燕山大學(xué)信息科學(xué)與工程學(xué)院;
【基金】：博士學(xué)科點(diǎn)專項(xiàng)科研基金(20130032130001) 天津市科技興海項(xiàng)目(KJXH201306) 天津市項(xiàng)目(14JCZDJC32300) 國家重點(diǎn)研發(fā)計(jì)劃(2016YFC0802103)項(xiàng)目資助
【分類號】：TE973.6

【相似文獻(xiàn)】

相關(guān)期刊論文 前10條

1 徐晴晴;張來斌;梁偉;;天然氣管道泄漏聲場特性研究[J];石油機(jī)械;2011年02期

2 龐海艷;;天然氣管道泄漏及其檢測方法的幾點(diǎn)分析[J];中國石油和化工標(biāo)準(zhǔn)與質(zhì)量;2013年17期

3 劉存貴,張英杰;煤氣管道泄漏不停產(chǎn)搶修[J];煤氣與熱力;2003年12期

4 張朝陽,蘇華東;用流速測試儀確定管道泄漏點(diǎn)的位置[J];石油規(guī)劃設(shè)計(jì);2004年06期

5 瞿f，

本文編號：1635870