Preparation of solenoid probe for Eddy Current Testing technique probe

Abstract

The most crucial components in the system of eddy currents are the sensitivity of the probe to deliver a signal to detect a defect on the material efficiently. When the turns are closely spaced and the length is substantially more than the radius of the turns, the solenoid is perfect. This paper presents a development of a solenoid probe for the eddy current testing (ECT) technique probe to detect defects. The objectives of this research are to design and construct a high sensitivity rod-shaped solenoid probe, to find the optimal frequency for each metal testing (i.e., Copper (Cu), Aluminium (Al), and Stainless Steel) for this solenoid probe, and to obtain the output testing signals defects with vary of thickness (i.e., 1.5 mm, 3.0mm, and 5.0 mm). In addition, a hole of an artificial defect (i.e., 7.0 mm, 14.0 mm, 21.0 mm) has been drilled on each of the metal testings. This rod-shaped solenoid coil was designed with an iron core with 65 mm length, 5 mm area, and 200 turns. It demonstrates how the rod-shaped solenoid coil may be used to detect various flaws in copper (Cu), aluminium (Al), and stainless steel. The optimal frequencies for copper were 7.850 MHz, Aluminium was 7.383 MHz, and Stainless-Steel metal was 7.956 MHz.