Magnetic measurement array device and method for detecting depth of magnetic source

Abstract

The invention relates to a magnetic measurement array device for detecting the depth of a magnetic source, and the device comprises a first magnetic measurement sensor unit, a second magnetic measurement sensor unit, and a third magnetic measurement sensor unit. Each group of magnetic measurement sensor units are horizontally arranged at a preset interval; the first magnetic measurement sensor unit comprises a first magnetic measurement sensor and a fourth magnetic measurement sensor which are arranged up and down, the second magnetic measurement sensor unit comprises a second magnetic measurement sensor and a fifth magnetic measurement sensor which are arranged up and down, and the third magnetic measurement sensor unit comprises a third magnetic measurement sensor and a sixth magnetic measurement sensor which are arranged up and down. The invention also relates to a method for detecting the depth of the magnetic source, and the method comprises the steps: calculating the depths of two magnetic source targets through the obtained two groups of magnetic abnormal signals, and averaging the depths of the two magnetic source targets to obtain the final depth of the magnetic source. The depth of the magnetic source can be effectively detected, and the practicability is good.

Description

technical field [0001] The invention relates to the technical field of electromagnetic nondestructive testing, in particular to a magnetic measuring array device and method for detecting the depth of a magnetic source. Background technique [0002] Defects or structural interfaces inside metal materials (components), such as inclusions, pores, delamination, weld pools, etc., will generate certain abnormal magnetic field signals on the surface of materials (components), and such defects that can cause abnormal magnetic field signals are all Can be collectively referred to as the target magnetic source. It is an important issue in the field of nondestructive testing to carry out nondestructive testing on the target magnetic source and prepare to determine the burial depth of the target magnetic source. Commonly used non-destructive testing methods: eddy current testing (ECT), radiographic testing (RT), ultrasonic testing (UT), magnetic particle testing (MT) and penetrant test...

AI Technical Summary

Problems solved by technology

Radiographic testing (RT) has a high detection rate for defects, and the defect imaging is more intuitive; but affected by the incident angle and component thickness, it cannot effectively quantify the defect depth

Ultrasonic testing (UT) generally requires couplant, and there is also the problem that defects can be detected but the buried depth cannot be determined

Therefore, the existing non-destructive testing technology can generally find defects, but cannot accurately quantify the burial depth of defects.

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