Results 171 to 180 of about 995,675 (222)
Drift-free ferroelectric photodetection with fast temporal response via thermal diffusion engineering. [PDF]
Nat CommunMinhas JZ +5 more
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Pulsed Electromagnetic Fields and Bioimpedance Monitoring of Peripheral Circulation: A Scoping Review and Proposed Adaptive Control Framework. [PDF]
Bioengineering (Basel)Hammoud A +4 more
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Pulse phase infrared thermography
NDT & E International, 1996An approach is proposed which combines simultaneously advantages both of pulse (PT) and modulated infrared thermography. In a nondestructive evaluation perspective, the specimen is pulse heated as in PT and the mix of frequencies of the thermal waves launched into the specimen is unscrambled by performing the Fourier transform of the temperature ...
X Maldague, S Marinetti
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Applied Optics, 2022
Reflectographic analyses applied on paintings can be performed using cameras equipped with different detectors with different abilities in detecting and visualizing underdrawings, repainting, restorations, and other nonvisible information.
Jacopo Melada +2 more
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Reflectographic analyses applied on paintings can be performed using cameras equipped with different detectors with different abilities in detecting and visualizing underdrawings, repainting, restorations, and other nonvisible information.
Jacopo Melada +2 more
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Double pulse infrared thermography
NDT & E International, 2004Abstract 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
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Pulse shaping in infrared thermography for nondestructive evaluation
Review of Scientific Instruments, 2003Infrared 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
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Pulsed infrared thermography for assessment of ultrasonic welds
Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, Civil Infrastructure, and Transportation XII, 2018Battery packs are a critical component in electric vehicles. During pack assembly, the battery cell tab and busbar are ultrasonically welded. The properties of the welds ultimately affect battery pack durability. Quality inspection of these welds is important to ensure durable battery packs.
Ryan Sekol +2 more
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Heat-stimulus correction for pulsed-infrared thermography
SPIE Proceedings, 2009The 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 +3 more
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Modified Infrared Images Contrast for Pulsed Thermography
2011 Third International Conference on Measuring Technology and Mechatronics Automation, 2011Infrared 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
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Characterization of buried cylinders and spheres by pulsed infrared thermography
Journal of Applied Physics, 2005A 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 +3 more
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