Immersion acoustic detection method of large storage tank bottom plates and prototype design

doi:10.16265/j.cnki.issn1003-3033.2020.08.005

Abstract

Abstract: In order to achieve global detection of corrosion on bottom plates of large storage tanks, an immersion acoustic detection method was proposed. Firstly, the detector equipped with liquid immersion acoustic sensors was put on bottom plates, and was controlled to move following specified path so as to collect acoustic corrosion signals of tank bottom by units. Secondly, building on collected signals, corrosion sound source was located by using plane small array unit algorithm. Thirdly, based on functional requirements of detectors, prototype of an automatic immersion acoustic detector was designed which mainly included motion module, detection module and recovery module with functions of automatic global inspection, signal collection, location of corrosion sources, and self-recovery. Finally, this localization algorithm was applied in a simulated storage tank sound source localization test. The results show that positioning accuracy of plane small base array algorithm is within 0.2% and it is not affected by angle of sound source.

Key words: large storage tank, immersion acoustic detection, sound source of corrosion, acoustic emission sensor, global detection

CLC Number:

X937

ZHANG Ying, GAO Junwei, ZHU Zidong, LIU Shi, ZHANG Xiao. Immersion acoustic detection method of large storage tank bottom plates and prototype design[J]. China Safety Science Journal, 2020, 30(8): 31-36.

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