Principle of infrared thermometer

All objects with a temperature higher than 0K are constantly radiating energy in the form of electromagnetic waves. The energy of the radiated electromagnetic waves depends on the energy of the object itself, and the energy of the object itself can be measured by the physical quantity of temperature, which is Measure the energy radiated by an object (mainly infrared rays with a longer wavelength) → calculate the energy value → reverse the object temperature.

The optical system concentrates the infrared radiation energy of the target in its field of view, and the size of the field of view is determined by the optical parts of the thermometer. The infrared thermometer is composed of optical system, photodetector, signal amplifier and signal processing, display output and other parts. The location is ok. The infrared energy is focused on the photodetector and converted into corresponding electrical signals. The signal passes through an amplifier and a signal processing circuit, and is converted into the temperature value of the measured target after being corrected according to the internal therapy algorithm and target emissivity of the instrument. In addition, the target and the environmental conditions where the thermometer is located, such as the influence of temperature, atmosphere, pollution and interference on performance indicators and correction methods should also be considered.