How to use infrared temperature measuring gun?

As long as the muzzle is aimed at the measured object, the temperature of that object can be reported directly by the numbers on the display screen of the gun tail.

Principle: In nature, all objects whose temperature is higher than absolute zero are constantly emitting infrared radiation energy to the surrounding space. The magnitude and wavelength distribution of infrared radiation energy of an object are closely related to its surface temperature. Therefore, by measuring the infrared energy radiated by the object itself, its surface temperature can be accurately measured, which is the objective basis of infrared radiation temperature measurement.

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 components of the thermometer and its position. Infrared energy is focused on the photodetector and converted into corresponding electrical signals.

The signal passes through an amplifier and a signal processing circuit, is corrected according to the built-in algorithm of the instrument and the target emissivity, and then is converted into the temperature value of the measured target. In addition, the environmental conditions of the target and thermometer, such as temperature, atmosphere, pollution and interference, should be considered and the correction methods should be considered.

Extended data:

Influence of object emissivity on radiation temperature measurement: Almost all the actual objects in nature are not blackbody. The radiation amount of all practical objects depends not only on the radiation wavelength and the temperature of the object, but also on the material type, preparation method, thermal process, surface condition and environmental conditions.

Therefore, in order to apply the law of blackbody radiation to all practical objects, it is necessary to introduce a proportional coefficient related to material properties and surface state, that is, emissivity. According to the radiation law, as long as the emissivity of the material is known, the infrared radiation characteristics of any object are known.

The main factors affecting emissivity are material type, surface roughness, physical and chemical structure and material thickness.

When measuring the temperature of a target with an infrared radiation thermometer, it is necessary to measure the infrared radiation of the target within its wavelength range first, and then calculate the temperature of the target with the thermometer. Monochrome thermometer is proportional to the radiation in the band; The two-color thermometer is directly proportional to the radiation ratio of the two bands.