Browse by author
Lookup NU author(s): Dr Wai Lok Woo,
Professor Gui Yun TianORCiD
Full text for this publication is not currently held within this repository. Alternative links are provided below where available.
Eddy current pulsed thermography (ECPT) is an emerging nondestructive testing and evaluation (NDT&E) technique and has been applied for a wide range of conductive materials. In this paper, a single-channel blind source separation is proposed to process the ECPT image sequences. The proposed method enables: 1) automatically extract valuable spatial and time patterns according to the whole transient response behavior without any training knowledge, 2) automatically identify defect patterns and quantify the defects, and 3) to provide guidelines of choosing the optimal contrast functions that can improve the separation results. In this paper, both mathematical and physical models are discussed and linked. The basis of the selection of separated spatial and time patterns is also presented. In addition, an artificial slot and a thermal fatigue natural crack are applied to validate the proposed method.
Author(s): Gao B, Bai LB, Woo WL, Tian GY, Cheng YH
Publication type: Article
Publication status: Published
Journal: IEEE Transactions on Instrumentation and Measurement
Print publication date: 04/11/2013
ISSN (print): 0018-9456
ISSN (electronic): 1557-9662
Publisher: Institute of Electrical and Electronics Engineers
Altmetrics provided by Altmetric