The Effect of Self-Radiation on the Accuracy of Infrared Temperature Measurement

Non-cooled infrared thermal imager is the most widely used instrument for infrared temperature measurement. Sometimes the field environment is different from the correctional environment, and because the off-site environment is unpredictable, the original temperature measurement software is not enough to represent the off-site environment. Therefore, it is necessary to investigate the effect of self-radiation on measurement accuracy of the tested object under the condition of changeable off-site environment. In this study, the relationship between the gray value of infrared image and the change of blackbody temperature, environmental temperature and the temperature of infrared thermal imager are deduced by experimental method. A model is established and solved to reduce the radiation effect of infrared thermal imager on the accuracy of infrared temperature measurement.