高温下数字图像相关散斑最优成像探究

胡悦; 王永红; 鲍思源; 胡慧然; 闫佩正

doi:10.3788/CO.20181105.0728

Volume 11 Issue 5

Oct. 2018

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Article Contents

Chinese Optics > 2018 > 11(5): 728-735.

HU Yue, WANG Yong-hong, BAO Si-yuan, HU Hui-ran, YAN Pei-zheng. Optimal imaging of digital image correlation speckle under high temperature[J]. Chinese Optics, 2018, 11(5): 728-735. doi: 10.3788/CO.20181105.0728

Citation:

HU Yue, WANG Yong-hong, BAO Si-yuan, HU Hui-ran, YAN Pei-zheng. Optimal imaging of digital image correlation speckle under high temperature[J]. Chinese Optics, 2018, 11(5): 728-735. doi: 10.3788/CO.20181105.0728

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Optimal imaging of digital image correlation speckle under high temperature

doi: 10.3788/CO.20181105.0728

School of Instrument Science and Optoelectronic Engineering, Hefei University of Technology, Hefei 230009, China

Funds:

National Key Research and Development Program 2016YFF0101803

National Natural Science Foundation 51375136

Central University Fundamental Research Funds Funding JZ2015HGBZ0497

More Information

Corresponding author: WANG Yong-hong, E-mail:yhwang@hfut.edu.cn
Received Date: 16 Jan 2018
Rev Recd Date: 05 Mar 2018
Publish Date: 01 Oct 2018

Abstract

Abstract

In order to measure the mechanical properties of materials at high temperatures or even at ultra-high temperatures, digital image correlation methods are used and their optimal imaging at high temperatures is studied. Different speckle production methods are adopted and high temperature paints of different colors are added. At different temperature nodes, different light sources and corresponding filters are added to collect and observe whether the image has a good contrast. The ordinary monochromatic light source will gradually fail after 800℃, and the image cannot be obtained. The ultraviolet light can still obtain a better image at 1 200℃, and the color of the test piece itself is better as the background color. UV light illumination can be used to measure DIC in high temperature environment. At the same time, the use of black or blue speckle directly sprayed on the test piece has the best contrast, which is superior to the conventional speckle making method.
- Digital image correlation,
- high temperature measurement,
- ultraviolet light,
- speckle

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References(15)

References

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