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A new optical laser extensometer using a position sensitive detector (PSD)

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5 Author(s)
Noh, Jiwhan ; Dept. of Mechatronics, Kwangju Inst. of Sci. & Technol., Gwangju, South Korea ; La, Jongpil ; Youm, Woosub ; Chulsoo Kim
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In the conventional non-contact type extensometer, the deformation of a material is obtained on the time basis which requires high accurate scanning linear velocity. In this paper, a new method of the optical laser extensometer is proposed by using a position sensitive detector (PSD) which gives a direct information of the linear displacement of deformation of a material. The distance between the reflection tapes on the specimen can be obtained by using the signals from the photo-TR and the PSD while the laser beam scans along the specimen. The optical system of the proposed system, signal processing, control of the reflection motor, and experimental result are presented.

Published in:

Advanced Intelligent Mechatronics, 2003. AIM 2003. Proceedings. 2003 IEEE/ASME International Conference on  (Volume:2 )

Date of Conference:

20-24 July 2003