A Feature Extraction Technique Based on Factor Analysis for Pulsed Eddy Current Defects Categorization

Malaysia International NDT Conference and Exhibition 2018

Latif, Nurul A'In Ahmad^1^3 ; Abidin, Ilham Mukriz Zainal^1 ; Azaman, Noorhazleena^1 ; Jamaludin, Nordin^2 ; Mokhtar, Ainul Akmar^3

Leading Edge Non Destructive Testing Group, Industrial Technology Division, Malaysian Nuclear Agency, Bangi Selangor

43000, Malaysia^1

Department of Mechanical and Materials Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, Bangi, Selangor

43600, Malaysia^2

Mechanical Engineering Department, Universiti Teknologi Petronas, Bandar Seri Iskandar, Perak

32610, Malaysia^3

关键词: Confirmatory factor analysis;    Feature extraction techniques;    Features extraction;    Non destructive testing;    Pulsed eddy current;    Stainless steel thin plates;    Subsurface defect;    Time to peak;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/554/1/012001/pdf
DOI  :  10.1088/1757-899X/554/1/012001

来源: IOP

【 摘 要 】

Pulsed eddy current (PEC) is an advance Non-destructive testing that is widely used in multiple industries for surface and subsurface defect detection. Normally, the conventional features extractions are conducted based on time to peak and peak value response. However, signals extraction could be a confusing for a thin specimen because times to peak for both surface and subsurface defects are occurred at almost similar time. This paper introduced the application of confirmatory Factor Analysis for defect categorizing for stainless steel thin plate. Through this statistical method, two categories of defects namely surface and subsurface defects are clearly to be distinguished between one to another.