多尺度相关分析在管道泄漏检测中的应用  

A New Method of Leak Detection Based on Multiscale Correlation

作　　者：崔谦[1] 靳世久[1] 王立坤[1] 

机构地区：[1]天津大学精密测试技术及仪器国家重点实验室

出　　处：《电子测量与仪器学报》2005年第5期50-53,62,共5页Journal of Electronic Measurement and Instrumentation

摘　　要：传统相关检漏法是在固定尺度上对信号进行处理,如果滤波参数选择不当将产生较大的计算偏差。本文提出将小波变换的多尺度分析方法与动态系统模型相结合,实现压力信号的多尺度相关分析,获得了比单一尺度上更好的处理效果。实验数据也证明了该方法的有效性。Correlation techniques are widely used in leak detection, and these have been extremely effective when attempting to locate leaks in oil pipeline. However, unsuitable filtering parameters may result in large errors at a single scale. In this paper we present a muhiscale correlation method based on the wavelet transform and Kalman filtering. The estimates obtained by use of the new method are more accurate than the results based on Kalman filtering at a single scale. The experimental results are provided to show the superiority of the proposed method.

关 键 词：管道 泄漏检测 互相关 多尺度系统理论 负压波 

分 类 号：O174.2[理学—数学] TE973.6[理学—基础数学]