摘要
选用小波阈值去噪方法,利用LabVIEW中的函数模块实现信号的滤波和数据处理。利用小波变换的多尺度功能提取信号的突变或瞬态特征,准确地求取奇异点的位置,获得压力信号传播到首尾端的时间差。有效提高了压力波传播时间差的测量精度,从而提高管道泄漏点的定位精度。
The wavelet analytic function in LabVIEW was used to achieve filtering and data processing of the collected pressure signals for the pipeline leakage detection.The method used the maximum value of the wavelet transformation mode to detect the oddity point of pressure,and to obtain the time lag that the pressure signal transmission to head and tails.The method had been proved to be able to enhance effectively the measuring accuracy for the pressure signal transmission time lag,so it can improve the accuracy of pipeline leak-spot locating.
出处
《船海工程》
2010年第2期101-104,共4页
Ship & Ocean Engineering
