Storage tank acoustic emission detection method and system based on novel array

Abstract

The invention discloses a storage tank acoustic emission detection method and system based on a novel array, and relates to the technical field of storage tank corrosion positioning test, and the method comprises the following steps: collecting an acoustic emission signal; performing noise reduction processing, performing mode recognition on the acoustic emission signals after noise reduction processing, and determining the number of acoustic emission events meeting acoustic emission event judgment conditions; determining whether the number of the acoustic emission events is greater than or equal to a preset value, if so, performing positioning calculation, and if not, returning data acquisition; and according to the number of the acoustic emission event signals, carrying out positioning calculation by using a triangulation positioning algorithm, and determining the position of an acoustic emission source. According to the invention, a novel array positioning method is adopted, so that a tank bottom center position signal can be well identified, the phenomena of false positioning, repeated positioning and missing positioning existing in traditional positioning are well improved, the position of an acoustic emission source is more clearly identified, and a guarantee is provided for practical engineering application.

Description

technical field [0001] The invention relates to the technical field of storage tank corrosion location testing, in particular to a storage tank acoustic emission detection method and system based on a novel array. Background technique [0002] Acoustic emission detection technology, as a dynamic non-destructive testing technology, has low economic cost and small workload for detection, and also has real-time dynamic monitoring defects that are difficult to achieve by other non-destructive testing methods, and the acoustic emission wave comes from the defect itself rather than the outside, and has higher sensitivity Therefore, the acoustic emission detection technology is widely used in the field of atmospheric pressure vertical storage tank detection. [0003] Acoustic emission source localization algorithm is a difficult point in the research of acoustic emission detection technology. It aims to accurately locate the damage location, so as to further analyze the severity of...

AI Technical Summary

Problems solved by technology

In the application, it is found that as the diameter of the storage tank increases, the sensor arrangement is farther away from the center of the tank bottom. The traditional acoustic emission source positioning method does not receive the acoustic emission signal near the center of the tank bottom well, which affects the damage near the center of the tank bottom. Positioning effect; and the positioning algorithm has poor anti-interference ability, prone to repeated positioning, missing positioning and false positioning, and the disadvantages become more prominent when the number of sensors increases and the array density increases. These problems cause strong interference to accurate damage positioning and evaluation

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