摘要
为提高基于相关分析方法的管道泄漏监测系统的性能,通过引入信号传播通道的模型,将影响定位精度的因素分解为两个方面,即:泄漏点处负压波源信号的自相关函数和负压波信号传播过程的衰减;在此基础上,采用广义相关分析方法进行泄漏定位.该方法通过前置滤波,降低了负压波信号衰减和噪声对定位结果的影响,提高了泄漏点的定位精度.
In order to improve the performance of the correlation-analysis-based pipeline leak monitoring systems, a model for signal transmission channel is introduced and factors influencing leak location precision are divided into two parts, i.e. auto correlation function of source negative pressure wave （NPW） signal at the leak site and signal attenuation due to transmission along pipeline. On the basis of this analysis, the generalized correlation analysis method is adopted for leak location. With pre-filtering technology, the method suppresses the influences of NPW signal attenuation and noise on location result, and improves the leak detection accuracy.
出处
《信息与控制》
CSCD
北大核心
2009年第2期194-198,205,共6页
Information and Control
基金
国家863计划资助项目(2006AA04Z428)
国家自然科学基金资助项目(60574085)
国家自然科学基金重点资助项目(60736026)
关键词
泄漏定位
负压波
广义相关
leak location
negative pressure wave （NPW）
generalized correlation
