Skip to Main Content As negative pressure wave is applied to
leak detection and location of natural gas pipeline, the key is
how to realize accurate measurement of propagation velocity of
pressure wave and time difference. However, there exists problem
of lower accuracy in negative pressure wave method. Aiming at
the problems of velocity measurement formula with low precision
and low accuracy of leaking location, a modified velocity
measurement formula is proposed. In addition, based on the
theory of singularity detection of wavelet transform, the
singular characteristic of the transform wave caused by pipeline
leakage is detected accurately. The experimental results show
that it can achieve leak detection and location of natural gas
with higher accuracy through these methods. Measuring Technology
and Mechatronics Automation, 2009. ICMTMA '09. International
Conference on (Volume:1 ) Date of Conference: 11-12 April 2009