双波长图像测温方法影响因素实验研究

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中图分类号： TB942 文献标志码：A

Abstract： A study on the influencing factors of dual wavelength image temperature measurement method was conducted.Through theoretical analysis，a standard high-temperature blackbody radiation dual wavelength image temperature measurement system was built by selecting 680nm and 760nm dual wavelengths. Different temperatures were set to measure the standard blackbody radiation dual wavelength image. Based on the law of thermal radiation， a temperature inversion algorithm was established to evaluate the relative deviation and uncertainty of temperature measurement. On this basis， experimental research was conducted on the influencing factors such as exposure time， imaging distance， and gain. The results showed that the variation law of dual wavelength radiation intensity was consistent under different exposure times and imaging distances. The dual wavelength temperature measurement method can eliminate the influence of exposure time and imaging distance on the temperature measurement results through the ratio of dualwavelength intensity，and the relative deviation of the measurement is within 3.5% ; The growth of dual wavelength radiation intensity under different gains follows an exponential law， and it is necessary to correct the gain intensity and regress it to the non gain intensity value for processing， in order to eliminate the influence of the gain response law on temperature measurement results. Therelative deviation of gain corrected temperature measurement is still within 3% .Theresearch provides reference for the exploration of temperature measurement accuracy and industrial application of dual wavelength image temperature measurement method.

Keywords： temperature measurement; optical radiation temperature measurement method; dual wavelength method; radiation imaging method; influence factor

温度是用来衡量物体冷热状态的基本物理量。（剩余10277字）