《Table 1 Verification of measurement accuracy》

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《基于辐射光谱法的高温颗粒辐射传热参数在线测量方法研究（英文）》

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The nonlinear least squares method is used to analyzed actual radiation spectrum to obtain temperature Tmand emissivityε，and the radiation intensity Emcan be calcumated by Stefan-Boltzman’s Law.The result is compared with the set temperature in blackbody furnace and the corresponding theoretical blackbody radiation intensity Eb，as shown in Table 1，which shows that relative deviation between the temperature measured by Radiation Spectroscopyand theset temperature is less than 3%，and the relative deviation between the measured radiation intensity and theoretical blackbody radiation intensity is less than 5%.The calculated radiation intensity and temperature are generally higher than the set value and the theoretical value.Because the measured radiation signal is the accumulative value along the measurement direction in the blackbody furnace.However，it has little influence at the temperature ranging from 1 073to 1 373Kduring the measurement.This verifies the measurement accuracy of radiation parameters in high-temperature environment based on Radiation Spectroscopy.