The Development of Acoustic Emission for Leak Detection and Location in Liquid-Filled, Buried Pipelines

2009 ◽  
pp. 67-67-12 ◽  
Author(s):  
RK Miller ◽  
AA Pollock ◽  
P Finkel ◽  
DJ Watts ◽  
JM Carlyle ◽  
...  
Keyword(s):  
Acoustic Emission ◽  
Leak Detection ◽  
Buried Pipelines ◽  
Leak Detection And Location

ADAPTIVE LEAK DETECTION AND LOCATION IN UNDERGROUND BURIED PIPELINES

2004 ◽  
Vol 01 (03) ◽  
pp. 269-277 ◽  
Author(s):  
YUMEI WEN ◽  
PING LI ◽  
JIN YANG ◽  
ZHANGMIN ZHOU
Keyword(s):  
Adaptive Filtering ◽  
Leak Detection ◽  
Acoustic Signals ◽  
Location Estimation ◽  
Buried Pipelines ◽  
Signal Model ◽  
Processing Procedure ◽  
Analysis And Synthesis ◽  
Set Up ◽  
Leak Detection And Location

The vibrational acoustic signals collected on pipelines contain substantial information concerning the working status of pipelines. They can be used for pinpointing leaks in buried pipelines. However, because of the complexity of signal composition and the heavy corruption of signals by ambient noises, it is essential to set up an appropriate signal model and scheme of analysis and synthesis in order to extract leak signatures and specify leak locations. In addition, the features of vibrational acoustic signals vary with materials, sizes and buried conditions of tubular pipes. It is difficult to pre-determine the knowledge of signals, such as the spectral knowledge. Here, an adaptive detection and estimation strategy is proposed based on LMS adaptive filtering and modified Wavelet denoising. The feasibility leak detection and location estimation is first automatically analysed by the signal processing procedure without any prerequisite on signals and then the procedure adaptively finds better estimate. With the proposed schemes, even where collected signals are heavily blurred by bursting interferences and present non-stationary, the instrument may also carry on detection and achieve effective results.

Sign in / Sign up

Export Citation Format

Share Document