Diseño experimental de un dispositivo que por medio de una fuente de radiación infrarroja externa permita visualizar una imagen térmica de un objetivo.

Abstract

In this project, it was proposed to implement an experimental device that, based on the infrared emissions of the detected body, allows to be measured remotely the temperature of a specific area, for which a study was made of several projects previously developed and directly related to the development of technology. To do this, different methods to detect infrared radiation were investigated on the market, there are sensors with the ability to detect this radiation, but the FLIR Lepton 2.5 radiometric camera was chosen because it integrates a fixed focus lens assembly, a set of infrared long-wave microbolometer sensors of 80x60 (LWIR) and electronic components of signal processing. These signals are sent to a mini computer called Raspberry Pi through the graphic interface I 2 C y SPI. To stablish these communications, it was designed an algorithm and a graphic interface to link the components of the same code through the environment of programming Qt Creator. Additionally, several peripherals were used to implement a device and use it either fixed or portable. During the initial tests it was possible to correct errors and adjust some parameters and in the final tests, thermal images were taken in both domestic and industrial areas. After carrying out the tests in the different areas it was observed that when factors such as smoke and dust appear, the created function that updates the focal field matrix is very useful since it allows an update of the internal correction terms used to improve the quality of the image. Other factors such as the distance between the thermal chamber and the objective to be detected, as well as its dimensions and the temperature of the environment, will serve to have a better response in the acquisition and visualization of the obtained data.