基于EMD的分布式光纤管道测温信号去噪分析
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摘要
分布式光纤温度检测技术由于检测距离长、精度高、实时性好等优点,近年来在很多行业得到广泛应用,特别是在油气管道泄漏方面获得极大关注。利用分布式光纤测温系统通过检测油气管道温度,进而判断其是否发生泄漏。实验中获得的部分信号由于其噪声较大对判断结果产生影响,文章通过EMD算法对其进行消噪处理,结果表明EMD算法可在一定程度上消除噪声,但去噪效果一般。
Distributed optical fiber temperature detection technology has been widely used in many industries in recent years due to its long detection distance,high precision and good real-time performance,especially in the oil and gas pipeline leakage.The distributed optical fiber temperature measurement system is used to detect the temperature of the oil and gas pipeline to determine whether it leaks.Some of the signals obtained in the experiment have an influence on the judgment result due to its large noise.The paper uses the EMD algorithm for denoising.The results show that the EMD algorithm can eliminate the noise to a certain extent,but the denoising effect is general.
Distributed optical fiber temperature detection technology has been widely used in many industries in recent years due to its long detection distance,high precision and good real-time performance,especially in the oil and gas pipeline leakage.The distributed optical fiber temperature measurement system is used to detect the temperature of the oil and gas pipeline to determine whether it leaks.Some of the signals obtained in the experiment have an influence on the judgment result due to its large noise.The paper uses the EMD algorithm for denoising.The results show that the EMD algorithm can eliminate the noise to a certain extent,but the denoising effect is general.
引文
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[6]沈路,杨富春,周晓军,等.基于改进EMD与形态滤波的齿轮故障特征提取[J].振动与冲击, 2010, 29(03):154-157.
[7]韩军朝.基于小波分析和经验模态分解的探针信号去噪研究[D].秦皇岛:燕山大学,2012.
[8] Yu Y, Yu D J, Cheng J S. A roller bearing fault diagnosis method based on EMD energy entropy and ANN[J]. Journal of Sound and Vibration, 2006, 294(1-2):269-277.
[9]冀树德,樊长博,张来斌,等.基于EMD与功率谱分析的滚动轴承故障诊断方法研究[J].机械强度, 2006,28(4):628-631.
[2]何建平,周智,吴源华,等.光纤布里渊与布喇格光栅共线技术的温度互补偿[J].激光技术,2010,34(1):13-16.
[3] Pradhan H. S, Sahu P. K. Characterisation of Raman distributed temperature sensors based on eliminating Rayleigh noise impact[J]. Optics Communication,3013, 306:117-120.
[4] Weibin H E, Liao W, Xue Z, Zhang X. Research on online power cable monitoring technology based on distributed optical fiber temperature measurement. Guangdong Electric Power, 2013(5):253-255.
[5]张永德.基于经验模态分解的小波阈值信号去噪研究[D].昆明:昆明理工大学, 2011.
[6]沈路,杨富春,周晓军,等.基于改进EMD与形态滤波的齿轮故障特征提取[J].振动与冲击, 2010, 29(03):154-157.
[7]韩军朝.基于小波分析和经验模态分解的探针信号去噪研究[D].秦皇岛:燕山大学,2012.
[8] Yu Y, Yu D J, Cheng J S. A roller bearing fault diagnosis method based on EMD energy entropy and ANN[J]. Journal of Sound and Vibration, 2006, 294(1-2):269-277.
[9]冀树德,樊长博,张来斌,等.基于EMD与功率谱分析的滚动轴承故障诊断方法研究[J].机械强度, 2006,28(4):628-631.