Comparative Analysis of Image Measurement Accuracy in High Temperature Based on Visible and Infrared Vision

Abstract:

Image measurement is a common and non-contact dimensional measurement method. However, because of light deflection, visible light imaging is influenced largely, which makes the measurement accuracy reduce greatly. Various factors of visual measurement in high temperature are analyzed with the application of Planck theory. Thereafter, by means of the light dispersion theory, image measurement errors of visible and infrared images in high temperature which caused by light deviation are comparatively analyzed. Imaging errors of visible and infrared images are proposed quantitatively with experiments. Experimental results indicate that, based on the same imaging resolution, the relative error value of visible light image is 3.846 times larger than infrared image in 900°C high temperature. Therefore, the infrared image measurement has higher accuracy than the visible light image measurement in high temperature circumstances.

• Periodical: Applied Mechanics and Materials (Volumes 300-301)
• Pages: 1681-1686
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.300-301.1681
• Online since: February 2013
• Authors: Zheng Liu, Su Mei Cui, He Yin, Yu Chi Lin
• Keywords: Deviation Degree, Image Measurement, Infrared, Refractive Index, Visible Light

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