Author:
Zhang Tao, ,Feng Hao,Zeng Zhou-Mo
Abstract
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.
Publisher
Fuji Technology Press Ltd.
Subject
Industrial and Manufacturing Engineering,Mechanical Engineering
Reference4 articles.
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4. G. Lackner, “ACOUSTIC EMISSION TESTING (AT) ON FLAT BOTTOMED STORAGE TANKS: HOW TOCONDENSE ACQUIRED DATA TO A RELIABLE STATEMENT REGARDING FLOOR CONDITION,” European Conf. on Acoustic Emission Testing, pp. 1-8, 2002.
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