Research on a method for repairing breakpoints in temperature data of colorimetric thermometers

Due to its dynamic and non-invasive characteristics, it is difficult to obtain stable and accurate measurement results using contact thermocouple temperature measurement. The temperature measurement accuracy of infrared thermal imaging cameras in non-invasive temperature measurement is affected by factors such as flame emissivity and radiation path attenuation, and there is also a large temperature measurement error. Among them, the colorimetric thermometer can avoid the influence of the emissivity of the measured target, and has the advantages of high accuracy, strong anti-interference ability, and wide temperature measurement range. However, in engineering use, due to the energy zero points set by long-wave and short-wave radiation, the data calculated and output based on the principle of colorimetric thermometry has a "temperature breakpoint" phenomenon. Based on this kind of engineering situation, this paper proposes a temperature calibration method for colorimetric thermometers and a temperature data breakpoint repair method. The actual measurement and verification experiment of a high-temperature blackbody furnace has proven the effectiveness of this temperature data breakpoint repair method, providing more accurate temperature data values for experiments such as flame temperature testing.