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Indexed by:期刊论文

Date of Publication:2017-02-01

Journal:SMART MATERIALS AND STRUCTURES

Included Journals:SCIE、EI、Scopus

Volume:26

Issue:2

ISSN No.:0964-1726

Key Words:lead zirconate titanate (PZT) sensor; gas pipeline; leakage; negative pressure wave (NPW)

Abstract:In this paper, an innovative method for rapid detection and location determination of pipeline leakage utilizing lead zirconate titanate (PZT) sensors is proposed. The negative pressure wave (NPW) is a stress wave generated by leakage in the pipeline, and propagates along the pipeline from the leakage point to both ends. Thus the NPW is associated with hoop strain variation along the pipe wall. PZT sensors mounted on the pipeline were used to measure the strain variation and allowed accurate (within 2% error) and repeatable location (within 4% variance) of five manually controlled leakage points. Experimental results have verified the effectiveness and the location accuracy for leakage in a 55 meter long model pipeline.