Abstract
The physical state and physicochemical properties of matter can be directly affected by high temperature process. Therefore, the measurement of high temperature is of great significance in the fields of scientific research, material processing, and equipment evaluation. However, the existing charge-coupled device (CCD) colorimetric temperature measurement technology fails to deal with the system of integral equations, and it needs to be re-calibrated to obtain the channel proportional coefficient to complete the solution. Thus, the complexity of the preparation process is increased and experimental errors inevitably occur. In this study, Lagrange theorem calculation method of CCD colorimetric temperature measurement is not considered, and a temperature solution method based on Taylor expansion of integral equations is proposed by using the same hypothesis. The theoretical error range is analyzed, and the selection method of optimal expansion wavelength and the calculation steps of actual temperature measurement are presented. The uncertainty of the system is discussed, a comparative experiment of colorimetric temperature measurement is conducted by measuring the flame temperature, and the experimental error is analyzed. To verify the accuracy of theoretical calculations, this study effectively simplifies the calibration steps of temperature measurement equipment, and provides a new idea for multi-wavelength and multi-channel two-dimensional temperature measurement.
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