Nondestructive testing method based on multiple signal processing technology

Abstract

The invention discloses a nondestructive testing method based on a multiple signal processing technology. The nondestructive testing method is mainly used for performing nondestructive testing on concrete structures. The nondestructive testing method comprises the following steps: peeling off the interference of an original signal to an echo signal by use of an interference peeling-off technology and extracting signals of each point system; extracting an effective signal section by use of a truncation technology; and extracting a reference signal and analyzing a region to be tested based on a cross-correlation algorithm, and then making qualitative judgment on whether a defect is present or not and on the size of the defect. Defect characteristics can be discovered by virtue of layer-by-layer optimization processing, and then defect detection can be carried out. The nondestructive testing method has the advantages that the testing method is simple, the advantages of a plurality of processing algorithms are combined and utilized to improve the accuracy of testing, information about internal defects and the like of the concrete structures can be extracted in an everyday environment, quality monitoring and maintenance can be performed on the concrete structures such as bridges and buildings effectively, and the method is high in reliability and worthy of practical popularization and utilization.

Description

Technical field [0001] The invention belongs to the technical field of ultrasonic nondestructive testing, and in particular relates to a nondestructive testing method based on multiple signal processing technologies. Background technique [0002] As a building material that has been widely used for a long time, concrete has been used in various water conservancy and civil engineering projects. The quality of concrete is related to the quality of the entire project. Corrugated pipes are widely used in prestressed bridge structures. Grouting and grouting of bellows is an extremely important process. The grouting and grouting of bellows is not compact, which directly leads to the loss of performance of bridges and beam structures, leading to serious safety problems. The problem of pipe grouting quality inspection needs to be solved urgently. [0003] Since the end of the 1920s, scholars have tried to use ultrasound for non-destructive testing. In 1929, scientists in the former Sovie...

AI Technical Summary

Problems solved by technology

Therefore, the accuracy and precision of the current detection methods cannot meet the engineering requirements, and misjudgments often occur in actual measurements.

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