The purpose of the task is to evaluate the calibration of thermovision cameras. Modern microbolometers built into cameras have quite a few advantages over previous generations and they are highly resistant to external disturbances. They measure the radiation temperature indirectly through the optics, which we can measure very accurately.
The first part provides the physics background that is necessary to interpret the measure of temperature. The second part discusses various applications and this chapter is a theoretical background. There are described the basic concepts of temperature and heat, temperature scale, thermovision, electromagnetic energies, radiant energies of the body, Stefan-Boltzman's law, Planck's law, emissivity, atmospheric effects, temperature units, laboratory for metrology, and thermometer calibration quality. The third part is the thermovision camera. The composition, camera design, and operation of the thermovision camera is described. Performance parameters is described for cameras of the Fluke TiS 45 and Flir T650 sc. The fourth part is Calibration of Thermovision Cameras. The measurement procedure and the preparation of the equipment are described. Then the execution of measurements, the preparation of images and thermal data are described. The processing of images in the matlab programming environment and graphical data processing are described. Graph were then made from graphical data. Then the analysis and interpretation of graphs is followed.
The conclusions part summarizes the findings based on measurements, interpretations of graphical representations of results and properties of thermovision cameras. The graphic representations of the results obtained by measuring in the computer processing of thermograms are covered in the annexes of this document.
With the measurements we got a lot of experience and ideas and how to properly use thermovision cameras. In the course of evaluation we also discovered possible problems and errors that could be encountered during measurements.