摘要
将小波分析在模极大值处理中的优势应用到管道泄漏检测与定位信号分析中,根据信号小波变换模极大值和信号奇异性之间的关系,由小波变换模极大值沿尺度变化趋势分析出压力信号的突变点,计算出管道泄漏诱发的负压波传播到上下游监测点的时间差,利用负压波定位泄漏的常规公式确定出泄漏点的位置。实验证明,该方法能快速准确地捕捉压力信号突变点,并定位管道泄漏位置。
In this paper,the advantages of wavelet transformation modulus maximum is applied to analyze the leak detection and location of oil pipeline.Accordong to the relationship between the wavelet transform modulus maximum and singular odd point, by the trend that the wavelet transform modulus maxima changes along the scale, the time difference that the negative pressure wave signals transmited to the two inspection points can be calculated ,the location of leakage can be determined according to the normal formula accurately. Experiments show that the pressure signals odd points can be determined quickly and accurately, and the leakage location of oil pipelines can be calculated.
出处
《电子技术应用》
北大核心
2009年第9期135-137,共3页
Application of Electronic Technique
关键词
小波变换
信号奇异点
模极大值
管道泄漏
wavelet transform
signals singular points
maximum module
the leakage of oil pipelines
