Eddy current coil center calibration device and calibration method

Abstract

The present invention discloses a device for calibrating the electric center of the eddy current coil, which works on the normal calibration sample tube during the use of the original through-type eddy current, and a very critical step in this work is to measure the electric center and the electric center of the coil Check the coincidence adjustment of the steel tube mechanical center. The device changes the original two-step method of first finding the coil mechanical center and then the coil electrical center into the present one-step method of directly finding the coil electrical center through a method of utilizing electromagnetic induction. From the original mechanical adjustment to the measurement of electromagnetic induction. Moreover, because of the adoption of digital display technology, the final result is digitized, which is beneficial to future statistics, reduces labor intensity, and improves labor efficiency.

Description

technical field [0001] The invention relates to a calibration device and a calibration method for ensuring that the electrical center of a coil is consistent with the center of a detected object when it is used for eddy current flaw detection calibration sample tubes. Background technique [0002] Eddy current testing is an alternating magnetic field generated by an alternating current that acts on the conductive material to be tested, and induces an eddy current. If there is a defect in the material, it interferes with the generated eddy currents, i.e. forms an interference signal. The status of the defect can be known by detecting its interference signal with an eddy current flaw detector. There are many factors affecting the eddy current, that is, the eddy current contains abundant signals, and these signals are related to many factors of the material. How to separate the useful signals from many signals one by one is the function of the eddy current flaw detector. [0...

AI Technical Summary

Problems solved by technology

[0005] The existing technology basically uses the original mechanical center as the basis for the calibration sample tube, and the mechanical center is found by repeatedly measuring the geometric dimensions. The difference between the mechanical center and the electrical center of the coil can only be adjusted based on experience. It plays a considerable role in the adjustment, because there are considerable uncertain factors in each person, and the length of time for adjusting the sample tube is uncontrollable, which affects the production rhythm

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