Results 181 to 190 of about 253,309 (213)
Some of the next articles are maybe not open access.
AIP Conference Proceedings, 2002
A simple thermographic model has been developed that accurately describes the surface temperature response of a panel with flat bottom holes of different depths and diameters to a short heat pulse. This model assumes that a thin layer of material absorbs a radiant pulse of duration τ and that it subsequently cools off due to normal and lateral ...
openaire +1 more source
A simple thermographic model has been developed that accurately describes the surface temperature response of a panel with flat bottom holes of different depths and diameters to a short heat pulse. This model assumes that a thin layer of material absorbs a radiant pulse of duration τ and that it subsequently cools off due to normal and lateral ...
openaire +1 more source
Review of pulse phase thermography
SPIE Proceedings, 2015Pulsed phase thermography (PPT) was proposed in 1996 to enhance results from pulsed thermography experiments. PPT can be thought as the link between pulsed thermography (PT) and lock-in thermography (LT), since it provides phase delay (and amplitude) data (as in LT) from a PT configuration.
C. Ibarra-Castanedo, X. P. Maldague
openaire +1 more source
Infrared Physics & Technology, 2002
This paper describes several experimental investigations of newly developed thermographic NDT techniques based on the transient temperature measurements. Several experimental results of the pulse heating thermographic NDT and the lock-in thermographic NDT are shown.
Takahide Sakagami, Shiro Kubo
openaire +1 more source
This paper describes several experimental investigations of newly developed thermographic NDT techniques based on the transient temperature measurements. Several experimental results of the pulse heating thermographic NDT and the lock-in thermographic NDT are shown.
Takahide Sakagami, Shiro Kubo
openaire +1 more source
Pulsed thermography for the NDT of honeycomb composite
Fifth Symposium on Novel Optoelectronic Detection Technology and Application, 2019Honeycomb sandwich Composite has wide applications in manufacture, such as aircraft, automobile, rail transit, and so on, due to its special advantages. However, defects always exist in the honeycomb composite during manufacturing and in-service period, liquid ingress and debondings are the most typical defects.
Xiaoheng Wang +3 more
openaire +1 more source
Model-based Inversion for Pulse Thermography
Experimental Mechanics, 2019Pulse or flash thermography is a method of nondestructive evaluation that finds subsurface flaws in materials by observing a heat pulse and subsequent cooldown using a thermal camera. A fundamental constraint of pulse thermography is lateral heat diffusion that tends to blur the shapes of defects.
S.D. Holland, B. Schiefelbein
openaire +1 more source
Defect Characterization Using Pulsed Thermography
Journal of Nondestructive Evaluation, 2012Infrared Thermography is one of the advanced NDE methods that is becoming attractive due to its ability to inspect non invasively large areas in short times and provide full field images in a non contact nature. While initially the method started as a qualitative technique for defect detection alone, with the advent of lock in and pulsed techniques ...
D. Sharath, M. Menaka, B. Venkatraman
openaire +1 more source
Decay time analysis in pulse thermography
The European Physical Journal Special Topics, 2008Pulse Thermography is being used since several years for rapid detection of subsurface defects. This method is well suited for industrial applications because no physical contact to the test object is needed. Within a short measurement time robust results are obtained. Besides phase evaluation the decay time of surface temperature can be analyzed.
A. Gleiter, C. Spiessberger, G. Busse
openaire +1 more source
Pulsed phased thermography with the wavelet transform
AIP Conference Proceedings, 2000Pulsed thermography (PT) is a well established approach in nondestructive evaluation of materials: a short thermal perturbation stimulates the specimen of interest and the subsequent surface temperature evolution reveals specimen subsurface structure and thermal properties.
openaire +1 more source
A quantitative analysis of pulsed video thermography
NDT & E International, 1991Abstract The defect imaging capability of a pulsed video thermography system is assessed by detailed quantitative analysis of its performance in imaging a set of well characterized artificial defects in a steel test-piece. An analytical model is presented which provides an understanding of the imaging process.
S.K. Lau, D.P. Almond, J.M. Milne
openaire +1 more source
SPIE Proceedings, 2007
Inspection of aerospace components has always been a challenge. Infrared thermography has demonstrated to be a useful tool for this matter. In this paper, we offer a comparative study involving three active techniques: pulsed thermography, lock-in thermography and vibrothermography.
Clemente Ibarra-Castanedo +5 more
openaire +1 more source
Inspection of aerospace components has always been a challenge. Infrared thermography has demonstrated to be a useful tool for this matter. In this paper, we offer a comparative study involving three active techniques: pulsed thermography, lock-in thermography and vibrothermography.
Clemente Ibarra-Castanedo +5 more
openaire +1 more source