Title :
Advanced system for automating eddy-current nondestructive evaluation
Author :
Fahmy, Moustafa N I ; Hashish, Essam A. ; Elshafiey, Ibrahim ; Jannound, I.
Author_Institution :
Dept. of Electron. & Commun. Eng., Cairo Univ., Giza, Egypt
Abstract :
Various nondestructive evaluation (NDE) techniques are widely used in the inspection of sub-surface flaws. This paper introduces the results of a research conducted to enhance the performance of eddy-current nondestructive evaluation (ECNDE) by developing an integrated computer based system. Advantages of this system include increasing test speed, while avoiding errors due to human factors. The system can be used to optimize various parameters affecting the performance of inspecting sub-surface cracks including probe configuration and operating frequency range. Inspectability is enhanced by advanced processing of raw eddy current signal. The two-dimensional wavelet transform is applied to eddy current c-scan images to extract feature vectors representing the material flaws. Artificial neural network techniques are then invoked to automate the detection and classification of sub-surface flaws
Keywords :
automatic test equipment; computerised control; eddy current testing; feature extraction; flaw detection; image classification; inspection; neural nets; wavelet transforms; ECNDE; NDE techniques; artificial neural network techniques; classification; eddy current c-scan images; eddy current signal; eddy-current nondestructive evaluation automation; feature vectors; inspectability; integrated computer based system; material flaws; operating frequency range; performance; probe configuration; sub-surface flaws; test speed; two-dimensional wavelet transform; Computer errors; Eddy currents; Feature extraction; Frequency; Human factors; Inspection; Probes; Signal processing; System testing; Wavelet transforms;
Conference_Titel :
Radio Science Conference, 2000. 17th NRSC '2000. Seventeenth National
Conference_Location :
Minufiya
Print_ISBN :
977-5031-64-8
DOI :
10.1109/NRSC.2000.838977
