Laboratory Calibration and Comparison Verification of Multi-channel Self-calibration Infrared Radiation Thermometer
SUN Yan-dong1,2,HAO Xiao-peng2,XIE Chen-yü2,ZHOU Jing-jing2,ZENG Bing1,SONG Jian2,LING Ling1,2
1. College of Mechanic and Electronic Engineering, Chengdu University of Technology, Chengdu, Sichuan 610059, China
2. Remote Sensing Laboratory, Devision of Thermal Metrology Science, National Institute of Metrology, Beijing 100029, China
Abstract：The thermal infrared radiometer is critical for gathering field data and validating remote sensing satellite observation data. The accuracy of its calibration has a direct impact on the accuracy and application level of remote sensing data analysis. The design concept of a multi-channel self-calibration infrared radiation thermometer is primarily discussed. The laboratory calibration and repeatability experiments are performed to validate the level of instrument measurement data under long-term operation, and the uncertainty of instrument radiation brightness temperature is 0.27K. The mainstream radiometer is used for the laboratory test analysis, and the accuracy of the calibration results are compared. The maximum deviation of the multi-channel self-calibration infrared radiation thermometer is 0.26℃, and the overall deviation is within 0.3℃. The measurement level of the instrument is verified through outdoor grassland testing experiments. The results show that the multi-channel self-calibration infrared radiation thermometer has a high level of accuracy, and can meet the requirements of long-term, multi-channel and high-precision work in the field, providing data support for the field calibration.
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2023, Vol. 44 
