Infrared Temperature Measurement Accuracy Based on Atmospheric Transmittance

Infrared temperature measurement motivated many researchers in the field of thermography. The accuracy of measurement process is affected by the atmospheric transmittance as infrared temperature measurement does not need contact with the object under test. In this paper, we focus on the effect of the atmospheric transmittance on the measurement process because the atmosphere between the source of radiation and the thermal imager is usually the cause of perturbation in measurement. A software model with graphical user interface (GUI), based on a MATLAB code, is designed to enable the user to calculate the actual temperature of objects and the atmospheric transmittance as a function of various atmospheric parameters, including atmospheric temperature, relative humidity, path length, altitude and aerosol suspended particles. An experiment is carried out using infrared thermal camera, blackbody radiator and weather station to prove the feasibility of the GUI model by comparing the software model results with conventional method results.