Results 161 to 170 of about 61,541 (206)

Double pulse infrared thermography

NDT & E International, 2004
Abstract In this paper we propose a simple enhancing protocol for pulsed infrared thermography. The method is based on stimulating the specimen with two heating pulses separated by a short time interval delta. This approach was tested on several specimens of low and high thermal diffusivity and showed to provide higher thermal contrasts when an ...
X Maldague, A Ziadi, M Klein
openaire   +1 more source

Pulsed Infrared Thermography Failure Analysis of Low-emissivity Specimens Without Contaminations Caused by High-emissivity Coatings

International Workshop on Thermal Investigations of ICs and Systems, 2020
Pulsed Infrared Thermography (PIRT) is a very fast and non-destructive technique for testing various types of specimens. This makes PIRT interesting for inspections in industrial production lines.
D. Wargulski, D. May, J. Petrick, R. Schacht, B. Wunderle, M. Abo Ras   +5 more
semanticscholar   +1 more source

Pulse shaping in infrared thermography for nondestructive evaluation

Review of Scientific Instruments, 2003
Infrared thermography is a common technique for nondestructive evaluation. In active infrared thermography privileged here, a thermal stimulation is required to generate relevant thermal contrasts on specimens. Among stimulation techniques, pulse heating is one of the most common along with lock-in thermography.
A. Ziadi, F. Galmiche, X. Maldague
openaire   +1 more source

Heat-stimulus correction for pulsed-infrared thermography

SPIE Proceedings, 2009
The modified DAC version with thermal quadrupoles can be considered an interesting alternative to thermal contrast computations since it provides an automated tool for depth retrieval and eliminates the need of selecting a non-defective area. In practice it is important to have heat stimulus with complex shapes and long durations (several seconds ...
Hernán D. Benítez, Clemente Ibarra-Castanedo, AbdelHakim Bendada, Xavier Maldague   +3 more
openaire   +1 more source

Modified Infrared Images Contrast for Pulsed Thermography

2011 Third International Conference on Measuring Technology and Mechatronics Automation, 2011
Infrared Thermography is an emerging technology for nondestructive testing. However, it is subject to blurring and degradation of the acquired signal, as the diffusive nature in the process. This make difficulties for qualitative and quantitative analysis, especially when deeper defects located within the substrate, as well as high thermal conductivity
null Ma Shuohan, null Ma Qishuang
openaire   +1 more source

Pulse modulated microwave and infrared thermography for superficial hyperthermia

Journal of Central South University, 2012
A 3D temperature field distribution of biological tissue for superficial hyperthermia using a pulse modulated microwave (PMMW) was presented. A 3D sliced homogeneous phantom was radiated by the PMMW and an infrared thermal imager was applied to image temperature distribution throughout the phantom.
Guo-jun Ma, Guo-tai Jiang, Zhi-hong Chen
openaire   +1 more source

Characterization of buried cylinders and spheres by pulsed infrared thermography

Journal of Applied Physics, 2005
A theoretical model to calculate the time evolution of the surface temperature of an opaque sample containing buried cylinders or spheres, after the absorption of a short light pulse, has been developed. To do this we first calculate the temperature of the material when it is illuminated by a modulated light beam. Then, based on the analogy between the
Florencio Garrido, Agustín Salazar, Fernando Alonso, Idurre Sáez-Ocáriz   +3 more
openaire   +1 more source

Delamination defects detection for wind turbine blades based on pulsed infrared thermography

Nondestructive Testing and Evaluation
Carbon fibre reinforced polymer (CFRP) is extensively used in wind turbine blades (WTBs) due to its high specific strength, rigidity, and lightweight characteristics.
Chiwu Bu, Xin Huang, Peng Chen, Weiliang Bai, Qingju Tang   +4 more
semanticscholar   +1 more source

Paving the way for the replacement of solder interconnections in power electronics by silver-sinter using pulsed infrared thermography

European Microelectronics and Packaging Conference, 2019
In this work we show the capabilities of non-destructive testing by pulsed infrared thermography (PIRT) on large-area silver-sinter layers. This method can achieve a similar reliability in detecting delamination as SAM and X-ray analysis.
D. Wargulski, B. Rábay, A. Stelzer, J. Rudzki, Armin Hindel, M. Bast, D. Busse, E. Auerswald, M. A. Ras   +8 more
semanticscholar   +1 more source

Data-driven AI for the automated classification of the isothermal heat-treated thermal barrier coatings using pulsed infrared thermography

Journal of Physics D: Applied Physics
Development of reliable age prediction models are crucial in monitoring the formation of oxide layer and degradation of TBC at regular intervals. This study proposes an automated classification of isothermal heat-treated TBC samples using temperature ...
S. K. Kunji Purayil, Krishnan Balasubramaniam   +1 more
semanticscholar   +1 more source