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Improved monochromatic pyrometry for synchronous measurement of full-field temperature and deformation

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Abstract

Measuring the temperature and deformation synchronously at elevated temperatures is technically challenging and has become a major concern in the evaluation of mechanical properties. In this study, a simple, easy-to-implement, yet effective monochromatic pyrometry is established for non-contact and full-field temperature measurements, which can significantly reduce the error caused by the camera’s channel crosstalk that commonly occurs in the existing improved two-color method. In addition, high-temperature digital image correlation, combined with band-pass filtering and monochromatic illumination, is applied for deformation measurement. Subsequently, an experimental system was set up to validate the accuracy of the proposed method, which consists of a CCD camera for image capturing, a blue bandpass filter for radiation suppression, blue light irradiation for light compensation, and an infrared pyrometer for temperature recording. The results of the thermal heating experiment on the C/SiC sample proved that the selection of camera channel R in monochromatic pyrometry can reduce the error by channel crosstalk, and the proposed method is applicable for synchronous measurement of temperature and deformation.

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Authors and Affiliations

  1. Key Laboratory of Applied Mechanics, Department of Engineering Mechanics, Tsinghua University, Beijing, 100084, China

    JinSong Zhang, MengKun Yue, JinYang Wang, YunLong Tang & Xue Feng

  2. Center for Advanced Mechanics and Materials, Tsinghua University, Beijing, 100084, China

    JinSong Zhang, MengKun Yue, JinYang Wang, YunLong Tang & Xue Feng

  3. School of Engineering and Technology, China University of Geosciences, Beijing, 100083, China

    YunLong Tang

  4. Chengdu Aircraft Design and Research Institute, Chengdu, 610041, China

    JinSong Jiang

  5. China Aerodynamics Research and Development Center, Mianyang, 621000, China

    YeWei Gui

Authors
  1. JinSong Zhang
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  2. MengKun Yue
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  3. JinYang Wang
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  4. YunLong Tang
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  5. JinSong Jiang
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  7. Xue Feng
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Corresponding authors

Correspondence to YunLong Tang or Xue Feng.

Additional information

This work was supported by the National Natural Science Foundation of China (Grant Nos. 11625207 and 11972326) and the Fundamental Research Funds for the Central Universities (Grant No. 2652019071).

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Zhang, J., Yue, M., Wang, J. et al. Improved monochromatic pyrometry for synchronous measurement of full-field temperature and deformation. Sci. China Technol. Sci. 64, 2033–2046 (2021). https://doi.org/10.1007/s11431-021-1852-4

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  • DOI: https://doi.org/10.1007/s11431-021-1852-4

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