Results 201 to 210 of about 1,414,688 (255)

Visualization of defects in glass through pulsed thermography

Applied Optics, 2020
Pulsed thermography was exploited to identify the presence of glass defects in order to get an indication of the conservation status of archaeological glass. Indeed, the process of degradation in artifacts subjected to centuries of burial can be of great relevance. More specifically, we evaluated the potential of pulsed thermography to map the presence
Melada J., Ludwig N., Micheletti F., Orsilli J., Gargano M., Grifoni E., Bonizzoni L.   +6 more
openaire   +4 more sources

Decay time analysis in pulse thermography

The European Physical Journal Special Topics, 2008
Pulse 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

Model-based Inversion for Pulse Thermography

Experimental Mechanics, 2019
Pulse 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 Depth Quantification Using Pulsed Thermography

Advanced Materials Research, 2012
Pulsed Thermography is an advanced NDE technique which is becoming popular due to fast inspection rate, non contact nature and it gives full field image. Pulsed Thermography is successfully applied for defect detection, defect depth estimation, coating thickness evaluation and delamination detection in coatings but it is limited for evaluation of ...
D. Sharath, M. Menaka, B. Venkatraman
openaire   +1 more source

Neural Learning Based Blind Source Separation for Detection of Material Defects in Pulsed Thermography Images

IEEE International Conference on Electro/Information Technology, 2020
In this paper, we introduce a neural learning-based approach to blind source separation for detection of material flaws in pulsed thermography (PT) images.
Xin Zhang, J. Saniie, A. Heifetz
semanticscholar   +1 more source

Detecting deeper defects using pulse phase thermography

Infrared Physics & Technology, 2013
Abstract Detectable defect depth by pulse phase thermography (PPT) is reportedly improved when using phase at low frequency. This study was conducted to identify mechanisms detecting deeper defects by the PPT, and to determine the optimum frequencies for detecting defects with various depths and sizes.
Masashi Ishikawa, Hiroshi Hatta, Yoshio Habuka, Ryo Fukui, Shin Utsunomiya   +4 more
openaire   +1 more source

Square pulse thermography in frequency domain

SPIE Proceedings, 2008
In this paper a new approach for quantitative non-destructive testing (NDT) of near-surface structures in civil engineering (CE) with active thermography is presented. It adopts the method known as pulsed phase thermography (PPT) for the special requirements of NDT-CE and was developed in a German research project of the Federal Institute for Materials
openaire   +1 more source

Honeycomb Structure Detection Using Pulsed Thermography

2014
Pulsed thermography is a nondestructive evaluation method, which has been qualitatively and quantitatively applied for different classes of materials to detect variety of defects. In this study, one-dimensional theoretical model of transient heat conduction under an instantaneous plane source is described for its application in the detection of ...
Zhi Zeng, Xiaoli Li, Chunguang Li, Zhigang Ye, Cunlin Zhang, Jingling Shen   +5 more
openaire   +1 more source

Characterisation and evaluation of paint-coated marine corrosion in carbon steel based on pulsed eddy current thermography and BEMD noise-reducing method

Nondestructive Testing and Evaluation
Eddy current pulsed thermography (ECPT) technique has been investigated for steel corrosion detection and evaluation. However, the random interference was not considered and disposed adequately, which bedims the original thermal images and reconstructed ...
Xiaojie Ma, Song Ding, Yiqing Wang, Cheng Song, Qing Zhang, Jie Shen   +5 more
semanticscholar   +1 more source

Scanning pulse phase thermography with line heating

Quantitative InfraRed Thermography Journal, 2012
Thermographic investigations with a line heating source have been carried out, to localise small subsurface defects. The object is moved along the heating source, i.e. an induction coil in our experiments. The infrared camera is recording the temperature distribution either in reflection or in transmission mode.
Beate Oswald-Tranta, Mario Sorger
openaire   +1 more source