Abstract
Active microwave thermography (AMT) is a coupled electromagnetic (EM) and thermographic nondestructive testing and evaluation (NDT&E) technique. AMT utilizes a radiating EM source (e.g., an antenna) that induces dielectric/magnetic heating on a specimen under test (SUT) which is subsequently spatiotemporally imaged with an infrared (IR) camera. As all antennas have spatial variation in their radiated power density, a nonuniform thermal excitation results within (or on the surface of) the SUT. This nonuniform heating causes uncertainty in defect detection and has the potential to lead to false positives and/or negatives. To this end, thermographic signal reconstruction (TSR), a well-established thermographic signal processing technique, is considered as a method to alleviate the effects of nonuniform thermal excitation. It was found that while TSR improved defect indication, a modified variant, referred to as Active Microwave TSR (or AM-TSR), further improved defect indication. Additionally, the use of TSR/AM-TSR results in approximately 99.8% data compression.
Recommended Citation
L. M. Wilcox et al., "Active Microwave-Thermographic Signal Reconstruction," Conference Record IEEE Instrumentation and Measurement Technology Conference, Institute of Electrical and Electronics Engineers, Jan 2025.
The definitive version is available at https://doi.org/10.1109/I2MTC62753.2025.11079073
Department(s)
Electrical and Computer Engineering
Keywords and Phrases
Active Microwave Thermography (AMT); Nondestructive Testing and Evaluation (NDT&E); Thermographic Signal Reconstruction (TSR)
International Standard Serial Number (ISSN)
1091-5281
Document Type
Article - Conference proceedings
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2025 Institute of Electrical and Electronics Engineers, All rights reserved.
Publication Date
01 Jan 2025
