Topic
Thermography
About: Thermography is a research topic. Over the lifetime, 8016 publications have been published within this topic receiving 97023 citations. The topic is also known as: IIR.
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TL;DR: In this article, the theoretical and experimental aspects of three active thermography approaches: pulsed thermography, lock-in thermography and vibrothermography are discussed in relation to the nondestructive evaluation (NDE) of honeycomb sandwich structures.
Abstract: In this article, the theoretical and experimental aspects of three active thermography approaches: pulsed thermography (PT), lock-in thermography (LT), and vibrothermography (VT), are discussed in relation to the nondestructive evaluation (NDE) of honeycomb sandwich structures. For this purpose, two standard specimens with simulated defects (delaminations, core unbonds, excessive adhesive, and crushed core) were tested, and results were processed, examined, and compared. As will be pointed out, the similarities and differences between these active approaches allow conclusions to be made about the most suitable approach for a particular application. In addition, results from NDE inspection by X-rays and c-scan ultrasounds are provided and discussed for reference.
262 citations
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TL;DR: IR imaging offers a useful and non-invasive approach to the diagnosis and treatment of many disorders, in particular in the areas of rheumatology, dermatology, orthopaedics and circulatory abnormalities.
Abstract: Since the early days of thermography in the 1950s, image processing techniques, sensitivity of thermal sensors and spatial resolution have progressed greatly, holding out fresh promise for infrared (IR) imaging techniques. Applications in civil, industrial and healthcare fields are thus reaching a high level of technical performance. The relationship between body temperature and disease was documented since 400 bc. In many diseases there are variations in blood flow, and these in turn affect the skin temperature. IR imaging offers a useful and non-invasive approach to the diagnosis and treatment (as therapeutic aids) of many disorders, in particular in the areas of rheumatology, dermatology, orthopaedics and circulatory abnormalities. This paper reviews many usages (and hence the limitations) of thermography in biomedical fields.
253 citations
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TL;DR: In this paper, the results of the determination of the overall heat transfer coefficient (U-value) with the use of IR thermography for building envelopes are presented, and the obtained U-values are validated by means of measurements performed using a thermohygrometer for two seasons (summer and winter).
251 citations
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TL;DR: In this article, the authors illustrate the relevant use of infrared thermography as a non destructive, real-time and non contact technique to observe the physical processes of damage, fatigue and failure on metallic specimens subjected to low-cycle rotating bending loadings, detect the occurrence of intrinsic dissipation and evaluate rapidly the fatigue strength of the tested materials.
251 citations
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TL;DR: In this paper, the authors provided the theory and mathematical analysis in support of a recently proposed frequency modulated thermal wave imaging for nondestructive subsurface defect detection in solids.
Abstract: This letter provides the theory and mathematical analysis in support of a recently proposed frequency modulated thermal wave imaging for nondestructive subsurface defect detection in solids. The authors illustrate how the technique simultaneously combines the advantages of both conventional pulse based thermography as well as modulated lock-in thermography. A specimen is heated for launching thermal waves into the sample, not at a single frequency (lock-in) or at all frequencies (pulse), but in a desired range of frequencies. While peak power requirement is reduced, phase images obtained retain known advantages. Experimental results from a carbon fiber reinforced plastic sample are presented in support.
250 citations