Estudio de la variación de la temperatura obtenida mediante termografía infrarroja en función del incremento de la distancia de medición y la resolución de la cámara termográfica infrarroja

Abstract

The objective of this curricular integration work was to study the variation of the temperature obtained by infrared thermography as a function of the increase in the measurement distance and the resolution of the infrared thermographic camera. It was carried out through the collection, data analysis and adaptations in a test bench of the Technical Diagnosis and Energy Efficiency Laboratory. Adapting a test tube with greater thermal conductivity and size, using thermographic cameras with different resolutions. Thirty-six values were determined for each meter until completing twelve meters of distance from the inspected element. A linear regression was performed between the independent variable, which is the measurement distance and the camera resolution, as well as the dependent variable, which is the temperature obtained by infrared thermography, in order to obtain the definitive correction equation. External factors such as: wind, humidity and heat will be involved, which influenced the temperature not to remain constant in the measurement. Then, it was carried out a PID controller that allowed to have a constant temperature at the time of testing. It was concluded that the analysis of the size of the test tube was established with temperature values provided by the Satir HotFind-VR thermographic camera, where the coefficient of variation of 1.21% of the sample is less than the established 30%. In other words, the size of the aluminium specimen of 50mm x 50mm is accepted. So the temperature is distributed homogeneously throughout its face. In addition, it is recommended to carry out measurements in a closed place that does not allow to pass light, wind and heat. These factors affect the data to vary abruptly and using test tubes of another material to test its thermal conductivity.