Microprocessor-Controlled Eddy Current Measuring System for Qualitative On-Site Testing

Mayez Al-Mouhamed

Department of Computer Engineering King Fahd University of Petroleum and Minerals (KFUPM)

31261 Dhahran, Saudi Arabia

Abstract: A portable microprocessor-controlled eddy current measuring system to automate qualitative testing of metallic bodies. The system embodies automatic setting of operating frequencies, self-tuning, and measures variations in impedance of the sensing coil that correspond to defects or variation of the material under test. Small changes in signal phase and amplitude are detected by fast hardware which is controlled by a microprocessor. Evaluation shows clear detection of defects upon phase analysis.