Acta Optica Sinica, Volume. 31, Issue 2, 212001(2011)
High-Temperature Digital Image Correlation Method Based on Optical Band-Pass Filtering Imaging
Digital image correlation (DIC) technique based on band-pass filtering imaging for full-field deformation measurement of high-temperature objects is proposed. The DIC technique employs a narrow band-pass optical filter to alleviate the influence of thermal radiation of high-temperature sample on the captured images. As a result of this approach, high-quality digital image of the test sample surface at 1000 ℃ can be acquired and can be directly processed by DIC to extract full-field deformation. The full-field thermal deformation and coefficient of thermal expansion of a chromiumnickel austenite stainless steel sample at the temperature range of 16.5 ℃~1000 ℃ are measured to verify the proposed technique. Experimental results clearly indicate that the proposed technique can achieve high-accuracy measurements with simple principle and implementation, and is expected to find more engineering applications.
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Pan Bing, Wu Dafang. High-Temperature Digital Image Correlation Method Based on Optical Band-Pass Filtering Imaging[J]. Acta Optica Sinica, 2011, 31(2): 212001
Category: Instrumentation, Measurement and Metrology
Received: May. 24, 2010
Accepted: --
Published Online: Jan. 30, 2011
The Author Email: Bing Pan (panb04@mails.tsinghua.edu.cn)