Release Time:2019-03-11  Hits:

Indexed by: Journal Article

Date of Publication: 2017-10-01

Journal: SMART MATERIALS AND STRUCTURES

Included Journals: EI、SCIE、Scopus

Volume: 26

Issue: 10

ISSN: 0964-1726

Key Words: pipeline; structural health monitoring; crack detection; electromechanical impedance; electromechanical impedance sensor

Abstract: An extensive network of pipeline systems is used to transport and distribute national energy resources that heavily influence a nation's economy. Therefore, the structural integrity of these pipeline systems must be monitored and maintained. However, structural damage detection remains a challenge in pipeline engineering. To this end, this study developed a modified electromechanical impedance (EMI) technique for crack detection that involves fusing information from multiple sensors. We derived a new damage-sensitive feature factor based on a pipeline EMI model that considers the influence of the bonding layer between the EMI sensors and pipeline. We experimentally validated the effectiveness of the proposed method. Finally, we used a damage index-root mean square deviation-to examine the degree and position of crack damage in a pipeline.