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Lookup NU author(s): Junzhen Zhu,
Dr Jianbo Wu,
Professor Gui Yun Tian
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IEEE Eddy current pulsed thermography (ECPT) as one of the emerging NDT&E nondestructive testing and evaluation techniques has been used for the evaluation of the integrity of rail tracks, especially for rolling contact fatigue (RCF) detection and crack sizing. This paper proposes a probability of detection (POD) analysis framework for the ECPT system. Specifically, three different features, i.e. max thermal response, first-order different imaging and its ratio mapping, were used to quantify the length of the angular slot by linear fitting. Based on the fitting relation between these features and the slot length, POD curves for linear-coil based ECPT system of angular defect detection were calculated and compared. Results show that max thermal response feature has the highest repeatability and detectability for shorter slot detection. First-order different imaging and ratio mapping features are more convincing for longer slot detection.
Author(s): Zhu J, Min Q, Wu J, Tian GY
Publication type: Article
Publication status: Published
Journal: IEEE Transactions on Industrial Informatics
Print publication date: 01/12/2018
Online publication date: 21/08/2018
Acceptance date: 02/04/2018
ISSN (print): 1551-3203
ISSN (electronic): 1941-0050
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