Fuzzy Logic Error Compensation Scheme for Eddy Current Testing Measurement on Mild Steel Superficial Crack

摘要

Accurate measurement the depth of defect is essential to ensure the reliability and integrity of the pipe line structure and safety of the personnel workers in the oil and gas industry. This study proposes intelligent algorithm base on Fuzzy logic scheme to compensate the depth error measurement of GMR sensor on mild steel superficial crack. Intelligent rules in Fuzzy logic scheme allows the propose method to be effective on compensate lift off effect in between 1 and 4 mm. The Eddy current testing probe is design by utilize the sensitive of GMR sensor on magnetic field in order to improve the accuracy depth crack measurement on mild steel. The Arduino Mega 2650 was used as a data processing device for receiving and transmitting of signal through the available fifty-four digital pins (as input and output) and sixteen analogue pins. MATLAB is use as a platform to design and implementation the Fuzzy error compensation. The experiment results show the proposed sensor error compensation scheme able to reduce the error measurement up to 23%.