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Working Principle Of Infrared Thermometer
Oct 31, 2017

Understanding the working principle, technical index, environment working conditions, operation and maintenance of infrared thermometer is the basis of selecting and using infrared thermometer correctly. The optical system collects the target infrared radiation energy in the field, and the field of view is determined by the optical part and position of the thermometer. The infrared energy is focused on the photoelectric detector and converted to the corresponding electrical signal. The signal is transformed into the temperature value of the target after the amplifier and the signal processing circuit are corrected according to the algorithm and target emissivity of the instrument. In addition, the environmental conditions of the target and the thermometer, such as temperature, atmosphere, pollution and disturbance, are also considered.

All objects with temperatures above the absolute 0 degrees are constantly emitting infrared radiation energy to the surrounding space. The size of the infrared radiant energy of the object and its distribution by wavelength are closely related to its surface temperature. Therefore, by measuring the infrared energy of the object's own radiation, it can accurately measure its surface temperature, which is the objective basis of infrared radiation thermometry.

Infrared System: Infrared thermometer is composed of optical system, photoelectric detector, signal amplifier and signal processing, display and output parts. The optical system converges to the target infrared radiation energy in the field, and the field size is determined by the optical part and its position of the thermometer. The infrared energy is focused on the photoelectric detector and converted to the corresponding electrical signal. The signal is transformed into the temperature value of the target by the amplifier and the signal processing circuit, and corrected by the algorithm of the instrument's internal therapy and the target emissivity.





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