Results 171 to 180 of about 4,966 (214)

Pulsed thermography and infrared reflectography: comparative results for underdrawing visualization in paintings

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.
Melada J., Gargano M., Ludwig N.
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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
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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
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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, 2018
Battery 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, Teresa Rinker, Megan McGovern   +2 more
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Assessment of Ultrasonic Welds Using Pulsed Infrared Thermography

Journal of Nondestructive Evaluation, Diagnostics and Prognostics of Engineering Systems, 2019
Ultrasonic metal welding is used in the automotive industry for a wide variety of joining applications, including batteries and automotive wire harnessing. During electric vehicle battery pack assembly, the battery cell tab and busbar are ultrasonically welded. Quality inspection of these welds is important to ensure durable packs.
Megan E. McGovern, Teresa J. Rinker, Ryan C. Sekol   +2 more
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Study on detecting CFRP composites using pulsed infrared thermography

SPIE Proceedings, 2011
Composite sandwich structure has been widely used in aerospace due to its lightweight, high stiffness and strength. The quality of the structure is crucial to durability and structural integrity of the rehabilitated the structure, Delaminations, debonding and water ingressing to honeycomb are typical defects in the structure.
Yan Huo, Hui-Juan Li, Yue-Jin Zhao, Cun-Lin Zhang   +3 more
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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
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A new signal processing algorithm of pulsed infrared thermography

Infrared Physics & Technology, 2015
Abstract A new signal processing algorithm combining Markov and principal component analysis (PCA) algorithm, which was named as Markov–PCA algorithm, was proposed to process the pulsed infrared thermography. First, the image sequence was reconstructed using Markov algorithm, then the original complex data dimensionality was reduced using PCA ...
Qingju Tang, Chiwu Bu, Yuanlin Liu, Litao Qi, Zongyan Yu   +4 more
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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
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Nondestructive Testing of Paint Thickness Measurement by Pulsed Infrared Thermography

2006 Joint 31st International Conference on Infrared Millimeter Waves and 14th International Conference on Teraherz Electronics, 2006
In this paper, basic principles of active IR thermography are introduced, paints covered sample is excited by exterior energy with ordinary flashing lamps array, the subsequent change of surface temperature of the sample is monitored by an infrared camera, and sequence of thermal wave signal and data acquisition are processed using the computer, then ...
Liu Bo, Zhang Cun-lin, Shen Jing-ling, Feng Li-chun, Tao Ning, null Li Yan-hong, Ding You-fu, Shi Si-chao, Xu Yi-guang, Huo Yan, Zhao Shi-bin, Xu Wei-chao, Zhang Xiao-yan   +12 more
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