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Proceedings Paper

Noncontact ultrasonic excitation thermography inspection technique
Author(s): Ning Tao; Zhi Zeng; Lichun Feng; Dapeng Chen; Yue Li; Cunlin Zhang
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Paper Abstract

Conventional ultrasonic thermography (thermosonic or sonic infrared imaging) is a technique in which acoustic energy is coupled to the structure by means of an acoustic transducer in contact with the sample, the captured temperature at the defect areas by an infrared camera is relatively higher than that of the surrounding area. The primary problem of this technique is that the acoustic horn must be mechanically in contact against the tested sample with an applied force. Therefore, the potential for damaging the structure especially for the filmy, brittle and fragile structure can't be ignored. In this paper, a new NDE technique based on a non-contact ultrasonic excitation thermography has been presented. The technique utilizes a redesigned ultrasonic horn to excite the sample in a non-contact fashion, and an infrared camera to monitor the variation of the surface temperature. The presented experimental results show that the non-contact ultrasonic excitation thermography has some potential in NDE application.

Paper Details

Date Published: 15 November 2010
PDF: 6 pages
Proc. SPIE 7854, Infrared, Millimeter Wave, and Terahertz Technologies, 78543S (15 November 2010); doi: 10.1117/12.880769
Show Author Affiliations
Ning Tao, Capital Normal Univ. (China)
Zhi Zeng, Chongqing Normal Univ. (China)
Lichun Feng, Capital Normal Univ. (China)
Dapeng Chen, BeiHang Univ. (China)
Yue Li, Capital Normal Univ. (China)
Cunlin Zhang, Capital Normal Univ. (China)

Published in SPIE Proceedings Vol. 7854:
Infrared, Millimeter Wave, and Terahertz Technologies
Cunlin Zhang; Xi-Cheng Zhang; Peter H. Siegel; Li He; Sheng-Cai Shi, Editor(s)

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