The principle of two-color infrared thermometer_Advantages of two-color infrared thermometer
The principle of two-color infrared thermometer
The two-color thermometer works on the basis of the following principle: under the selected two infrared wavelengths and a certain bandwidth, the ratio of their radiant energy changes with the change of temperature. Two sets of different monochromatic filters with very narrow bandwidths are used to collect the radiant energy in two similar bands, convert them into electrical signals and then compare them, and finally determine the temperature of the measured target from the ratio, so it can basically Eliminate the inconvenience of adjusting the emissivity of the target material, the temperature measurement sensitivity of the two-color thermometer is high, the deviation from the real temperature of the target is small, and it is less affected by the test distance and the absorption in between. Better.
1. Advantages of using two-color thermometer in polysilicon production
(1) The principle of double colorimetric temperature measurement is used to directly measure the real temperature of the target, and it is basically not affected by the emissivity of the material, and no emissivity compensation is required.
(2) Visual aiming, you can see the target directly.
(3) Not sensitive to slight pollution of the window.
(4) Get rid of the dependence on the absolute energy of infrared, and insensitive to signal attenuation.
Second, the advantages of using a two-color thermometer in a vacuum sintering furnace:
(1) Temperature measurement is not affected by optical path pollution.
(2) Not sensitive to window contamination.
3. Advantages of using two-color thermometer in salt bath furnace:
(1) Temperature measurement is not affected by smoke pollution.
(2) Slight contamination of the thermometer lens does not affect the temperature measurement.
Fourth, the advantages of using a two-color thermometer for hot rolling of billets and steel strips:
(1) There is no emissivity effect due to scale.
(2) The lens of the two-color infrared thermometer is slightly polluted, which does not affect the temperature measurement.
