Acoustic Emission Based Tank Bottom Floor Corrosion Detection
Tao Zhang, Hao Feng, and Zhou-Mo Zeng
State Key Laboratory of Precision Measurement Technology and Instrument, Tianjin University, 92 Weijin Road, Nankai District, Tianjin, P.R.China
Received:December 2, 2012Accepted:February 25, 2013Published:March 5, 2013
Keywords:acoustic emission, TDOA, tank bottom floor, integrity evaluation, Mach-Zehnder interferometer
The tank bottom floor is a crucial component of large oil storage tanks, and its status has a pivotal impact on the integrity of the entire tank. Acoustic Emission (AE) monitoring is an advanced, in-service, nondestructive testing method internationally recognized to be capable of assessing the tank bottom floor without the necessity of prior tank cleaning. In this paper, the principle of Time Difference of Arrival (TDOA) is illustrated, and the efficiency of piezoelectric AE sensors is verified through a field experiment. The authors then investigate Mach-Zehnder interferometerbased AE sensors with a view to using optical fiber sensors as a substitute for acoustic emission detecting. The results of the experiment indicate that optical fiber AE sensors based on the Mach-Zehnder interferometer can be used as transducers sensitive to acoustic events, so they can serve as indicators of the imminent failure of a structure. In addition, some suggestions are put forward regarding forthcoming actual application.
Cite this article as:T. Zhang, H. Feng, and Z. Zeng, “Acoustic Emission Based Tank Bottom Floor Corrosion Detection,” Int. J. Automation Technol., Vol.7 No.2, pp. 205-210, 2013.Data files:
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