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We are increasingly aware that energy resources are as beautiful as they are finite. A reason that has motivated human beings to research and develop new tools, such as thermographic cameras or infrared cameras. A device that, in sectors such as construction, makes visible insulation problems that are not visible to the naked eye but have a great impact on the environment.
In this way, in recent years, thermography equipment has ceased to be a product that only appeared in Hollywood films or in news about war conflicts, to be used in other areas to take corrective measures in favor of sustainability, safety and, above all, energy saving.
A thermographic camera or infrared camera is a device that, based on the average heat emissions of the electromagnetic spectrum of the detected bodies, displays luminous images on a screen.
The images displayed in this type of cameras can be: monochromatic, using only one type of sensor that perceives a particular infrared wavelength, so the hottest areas appear in white, the least in black and the intermediate ones in gray; or polychromatic, usually exclusive cameras to measure temperatures and process the images to be displayed arbitrarily colored, as they are easier for the human eye to interpret.
All bodies emit heat radiation, in infrared form, depending on their temperature. And normally, the higher the temperature of an object, the more infrared radiation it emits. To capture it, these products have a thermal sensor, called a "microbolometer", which heats up and changes its electrical resistance when it receives infrared radiation. They work in a range known as "thermal infrared", where the most common temperatures on the earth's surface are found, between 8 and 14 microns (approximately -20 to 350 ºC). This change in resistance is measured and equated to a temperature and each temperature is assigned a color, so that the device's software ends up forming an image with visible resolution on the screen.
The use of thermal imaging in construction is used to determine, with great precision, where all the energy saving efforts of a building should be focused. Its quick and easy detection of energy losses, heat leaks, dampness, poor insulation or temperature distribution in heating systems allows a proper diagnosis to be made. Other applications:
