A Brief Discussion of Pulsed Eddy Current Technique for NDT

Pulsed eddy current technique is an advanced non-destructive testing method based on the principle of electromagnetic induction. By analyzing the excitation and response signals in a short time, it can effectively detect internal defects and their characteristics in materials. This article will delve into the principles of pulsed eddy current technique, its influencing factors, and its advantages in practical applications.

Basic pulsed eddy current principle

uses a broadband pulse excitation coil to generate an instantaneous current, thereby generating instantaneous eddy currents in the material under test. These eddy currents form a rapidly decaying pulse magnetic field under the action of the excitation current and propagate in the material. This decaying induction field produces a series of voltage-time signals in the probe, which contain depth information of the material. The core advantage of pulsed eddy current technique lies in its broadband frequency response, enabling the detection signal to provide rich depth information, which is crucial for the quantitative evaluation of materials.

In practical applications, the pulsed eddy current technique is capable of quickly and accurately detecting internal defects in materials, adapting well to complex structured materials. Its high resolution and depth detection capability have led to its widespread use in various fields, including aerospace, automobile manufacturing, and quality control of metal materials. The effectiveness of this method often relies on quality eddy current NDT equipment, ensuring reliable results. Click here to find out more about the automotive NDT equipment and Eddy Current equipment for sale.