Please use this identifier to cite or link to this item: https://doi.org/10.21256/zhaw-25345
Publication type: Conference paper
Type of review: Peer review (publication)
Title: Pulsed-active microwave thermography
Authors: Wilcox, Logan M.
Bonmarin, Mathias
Donnell, Kristen M.
et. al: No
DOI: 10.1109/I2MTC48687.2022.9806511
10.21256/zhaw-25345
Proceedings: 2022 IEEE International Instrumentation and Measurement Technology Conference (I2MTC)
Page(s): 1
Pages to: 6
Conference details: IEEE International Instrumentation and Measurement Technology Conference (I2MTC), Ottawa, Canada, 16-19 May 2022
Issue Date: 30-Jun-2022
Publisher / Ed. Institution: IEEE
ISBN: 978-1-6654-8360-5
Language: English
Subjects: Nondestructive testing and evaluation; NDT&E; Pulsed thermography; PT; Active microwave thermography; AMT; Thermal Contrast; TC; Signal-to-Noise Ratio; SNR
Subject (DDC): 621.3: Electrical, communications, control engineering
Abstract: Active microwave thermography (AMT) is a thermographic nondestructive testing and evaluation techniquethat utilizes an electromagnetic-based excitation with a subsequent infrared measurement of the surface thermal profile of the material or structure of interest. AMT has been successfully applied to several aerospace and civil infrastructure applications. This work seeks to expand the performance of AMT by incorporating a signal processing technique common to traditional (flash-lamp) thermography, referred to as pulsed thermography (PT). PT operates on the premise of a pulsed excitation, as opposed to a constant or step excitation (ST) over a given time-period that is typical to traditional active thermography. This work applies the pulsed approach to AMT, herein referred to as P-AMT, and compares the thermal contrast (TC) and signal-to-noise ratio (SNR) of traditional and pulsed AMT inspections as applied to a moisture ingress detection need. The results suggest that the optimal heating time (indicated through SNR) for P-AMT is less than that of traditional AMT with a reduced overall (absolute) temperature. This is important as it relates to any inspection with concerns for thermal damage as well an overall reduction in required inspection time.
URI: https://digitalcollection.zhaw.ch/handle/11475/25345
Fulltext version: Published version
License (according to publishing contract): Licence according to publishing contract
Departement: School of Engineering
Organisational Unit: Institute of Computational Physics (ICP)
Appears in collections:Publikationen School of Engineering

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