A method for improving temperature measurement accuracy on an infrared thermometer for the ambient temperature field

In order to improve the accuracy of an infrared thermometer, the main uncertainty sources of the system are analyzed and a compensation function is established on the basis of these corrections. The verification experiments are carried out by using a self-developed infrared thermometer and a blackbody. The experimental results indicate that the compensation function can reduce the infrared thermometer expanded uncertainty from ±3.6 °C to ±1.9 °C in the temperature range of -40 °C to 60 °C. This method can effectively improve the temperature measurement accuracy of an ambient temperature infrared thermometer in its measurement range.