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Research on Pipeline Leak Detection and Location Technology Based on Statistical Hypothesis Tests

Author: GouWuHou
Tutor: WangJianLin
School: Beijing University of Chemical Technology
Course: Control Science and Engineering
Keywords: Pipeline Leak Detection and Location Slow leak The second generation wavelet Multi-level hypothesis testing Negative pressure wave
CLC: TP274
Type: Master's thesis
Year: 2010
Downloads: 96
Quote: 0
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Abstract


Piped parallel with the railway, highway , aviation, water has become one of the five major means of transportation . Due to the aging of pipeline equipment , geographical and climatic conditions as well as vandalism and other causes of pipeline spills have occurred , there is an urgent need for pipeline leak detection and location . Based on negative pressure wave pipeline leak detection and location system can achieve rapid leak detection and localization of large leak , but slow opening valve due to slow leaks , it is difficult to effectively detect and locate Therefore, the study slow leak the detection and location of important theoretical significance and application value . In this paper, a signal pre-processing method based on second generation wavelet transform , the method will be single - branch reconstruction of low-frequency layers as pretreatment results output to the positioning procedures ; difficult to extract feature points for slow leak pressure signal decline , by studying the statistical characteristics of pipeline pressure signal , a leakage detection method based on a partial order statistical characteristics of the pressure signal and a multi- level hypothesis testing method of leak location ; build a test based on the second generation wavelet transform and multi-level assumptions the pipeline leak positioning System . Experimental studies have shown decreased significantly change the pipeline leak , based on the second generation wavelet transform and multi-level hypothesis testing , leak detection and location of the pressure signal to be able to accurately determine the location of the leak ; decline the changes slowly pipeline leak pressure signal can be achieved quickly locate with high positioning accuracy , and provides an effective way to solve the pipeline slow leak detection and location .

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CLC: > Industrial Technology > Automation technology,computer technology > Automation technology and equipment > Automation systems > Data processing, data processing system
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