A Method for Solving Defect Flux Leakage Signals Based on Combination of Prime Signals

Abstract

The invention discloses a method for solving a magnetic-flux leakage signal of a defect based on combination of element signals. The method comprises the following steps: firstly, acquiring a length l, a width w and a depth d of a defect corresponding to a magnetic flux leakage signal of a defect to be solved; then, acquiring an element signal fB(x) matched with the width w and the depth d in a preset database according to the width w and the depth d; performing a left shift conversion operation and a right shift conversion operation on the acquired element signal fB(x) in a length direction according to the length l to respectively obtain a left element signal fBL(x) and a right element signal fBR(x); combining the left element signal fBL(x) with the right element signal fBR(x) to obtainthe magnetic-flux leakage signal f(x) of the defect. The method can acquire the matched element signal from the preset database by only acquiring the width, depth and other basic information corresponding to the magnetic-flux leakage signal of the defect and then querying the preset database, and performing simple left shift conversion operation and right shift conversion operation on the elementsignal to obtain the magnetic-flux leakage signal f(x) of the defect; compared with complex methods for solving the magnetic-flux leakage signal of the defect, such as a magnetic dipole method or a finite element method, in the prior art, the method greatly simplifies processes of solving the magnetic-flux leakage signal of the defect and improving calculation efficiency.

Description

technical field [0001] The invention relates to the technical field of nondestructive testing, in particular to a method for solving defect magnetic flux leakage signals based on elemental signal combinations. Background technique [0002] Magnetic flux leakage testing for defects is a common non-destructive testing technique that can be used to evaluate and quantify defects. Due to the ill-conditioned problem of defect magnetic flux leakage signal inversion, the forward model that can solve the defect magnetic flux leakage signal is usually combined with the optimization iterative algorithm to search for the defect size closest to the target magnetic flux leakage signal, so as to realize defect quantification. The solution speed and accuracy of defect magnetic flux leakage signal determine the calculation efficiency of the entire defect quantification process, which is the key link of defect evaluation. [0003] In the existing related technologies, the methods for solving...

AI Technical Summary

Problems solved by technology

The modeling process of the finite element method is particularly complicated, requiring a large number of node calculations and iterations, and the calculation time is too long

Moreover, in the optimization iterative calculation, there are a lot of repetitive parameter setting and calculation work in the defect modeling process, which further reduces the solution efficiency of the defect magnetic flux leakage signal

At present, there is no research on the basic information of this kind of magnetic flux leakage signal and the related solution technology of defect magnetic flux leakage signal

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