What principle is used by infrared thermometers to measure temperature?
Infrared detection technology is the "Ninth Five-Year Plan" national scientific and technological achievements of key promotional projects, infrared detection is an online monitoring of non-stop high-tech detection technology, which combines photoelectric imaging technology, computer technology, image processing technology in one, through the reception of infrared radiation emitted by the object infrared radiation, the thermal image will be displayed on a fluorescent screen, so as to accurately determine the temperature distribution of the object surface, with accurate, real-time, fast and other advantages. Judge the temperature distribution on the surface of the object, with accurate, real-time, fast and other advantages. Any object due to its own molecular movement, constantly radiating infrared thermal energy, thus forming a certain temperature field on the surface of the object, commonly known as "thermal image". Infrared diagnostic technology is through the absorption of this infrared radiation energy, measured the temperature of the surface of the equipment and the distribution of the temperature field, so as to determine the heat of the equipment. At present, the application of infrared diagnostic technology test equipment is more, such as infrared thermometer, infrared thermal TV, infrared thermal imaging camera and so on. Like infrared thermal TV, infrared thermal imaging equipment such as the use of thermal imaging technology will not be able to see the "thermal image" into a visible image, so that the test effect is intuitive, high sensitivity, can detect subtle changes in the thermal state of the equipment, accurately reflecting the internal and external equipment, the heating situation, high reliability, very effective in the discovery of hidden equipment problems.
Infrared camera is the use of infrared detectors, optical imaging objectives and optical scanning system (the current advanced focal plane technology eliminates the need for an optical scanning system) to accept the infrared radiation energy distribution of the target to be measured graphically reflected in the infrared detector on the photosensitive element, in the optical system and infrared detectors, there is an optical scanning organisation (Focal Plane Thermal Imager does not have this organisation) on the object being measured by the scanning of the infrared thermal image, and focusing on the unit or spectral detector. And focus on the unit or spectroscopic detector, by the detector will be infrared radiation energy converted into electrical signals, amplified by the processing, conversion or standard video signal through the TV screen or monitor to display the infrared thermal image map. This thermal image corresponds to the heat distribution field on the surface of the object; in essence, it is the thermal image distribution map of the infrared radiation of each part of the target object to be measured due to the signal is very weak, compared with the visible image, the lack of hierarchy and three-dimensional sense, therefore, in the process of the actual action in order to determine the infrared heat distribution field of the target to be measured more efficiently, often using a number of auxiliary measures to increase the instrument's practical functions, such as image brightness, contrast control , real scale correction, pseudo-colour depiction and other techniques.
