Optical measurement method of necking process in the material tensile test

Lizhong Zhang; Xueping Song; Guohua Cao; Zhenglin Yu

doi:10.1117/12.318451

10 August 1998 Optical measurement method of necking process in the material tensile test

Lizhong Zhang, Xueping Song, Guohua Cao, Zhenglin Yu

Proceedings Volume 3558, Automated Optical Inspection for Industry: Theory, Technology, and Applications II; (1998) https://doi.org/10.1117/12.318451
Event: Photonics China '98, 1998, Beijing, China

Abstract

This paper puts forward a new method of optical real-time measurement in the necking process of material tensile test, including the change of the necking position and the necking value with the gradually applied load. Two dimension measurement is completed by the scanning of polygon mirror at the emitting end and the adoption of linear array TDI CCD components. The interference of stray light is restrained effectively because we use semiconductor laser as light source and optical filter at the receiving end. Furthermore, this paper deals with the correction method of non-uniform speed scanning beam at the receiving area, the factors effecting the ultimate measurement accuracy and the countermeasures.

Citation Download Citation

Lizhong Zhang, Xueping Song, Guohua Cao, and Zhenglin Yu "Optical measurement method of necking process in the material tensile test", Proc. SPIE 3558, Automated Optical Inspection for Industry: Theory, Technology, and Applications II, (10 August 1998); https://doi.org/10.1117/12.318451

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KEYWORDS

Charge-coupled devices

Optical testing

Materials processing

Semiconductor lasers

Prisms

Measurement devices

Reflectors

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