The measuring principle and characteristics of colorimetric thermometer

Abstract: the measuring principle and characteristics of colorimetric thermometer information produced by excellent flow meter, flow meter manufacturer to offer you the quotation. Colorimetric pyrometer high sensitivity, fast response, small observable target, high accuracy of measurement is dizzy. Temperature with a colorimetric pyrometer measured optical pyrometer, radiation pyrometer is more close to the true temperature. Can be used to measure molten iron, slag and molten steel temperature of matter. More flow meter manufacturers choose model price quote you are welcome to inquire, here is a colorimetric thermometer measuring principle and characteristics of the article details. Colorimetric pyrometer high sensitivity, fast response, small observable target, high accuracy of measurement is dizzy. Temperature with a colorimetric pyrometer measured optical pyrometer, radiation pyrometer is more close to the true temperature. Can be used to measure the temperature of molten iron, molten steel and slag substance 01. Temperature measuring principle and characteristics of colorimetric pyrometer. According to Wayne displacement law, when the temperature of the object changes, to the wavelength of the monochromatic radiation power zui large values increase or decrease the direction, intensity of the Ai and wavelength in people under 2 than changing, measured the change of brightness than the corresponding temperature can be measured with the same temperature of different objects in the wavelength of A! And; The brightness of the under 12. Than is different, so the colorimetric pyrometer is also made of blackbody calibration. The paper introduced the concept of colorimetric temperature now. When temperature r the actual object in two wavelengths. A, and the temperature for people under 2 brightness than the brightness of the Ts in the above two wavelengths, in bold letters than equal, has described the rs as the object of colorimetric temperature | according to the rules, can get 71 with: Ts, the relationship between the type? Under the wavelength and a2 are monochromatic emission rate; C2 is the first _ Planck constant. Instructed by colorimetric pyrometer is color temperature of the object, requires real temperature must also pass type ( 2 - 29) Amended huan by type ( 2) _29 Known colorimetric pyrometer has the following characteristics: 1) Color temperature can be less than, equal to or greater than the real temperature. _eAi = ~ 2, and the measured object into gray body, colorimetric temperature is equal to the real temperature of the object to be tested, the colorimetric pyrometer zui big advantages, such as: severe oxidation of the surface of the steel - Can be approximately regarded as gray body, instrument of the colorimetric value for temperature at this moment, can think approximately equal to the real temperature of the object to be tested, and don't need to be corrected. 2) Although the e value of the actual object and to change of value is bigger, but the same object ^ ^ ^ and 夂 smaller the ratio of the change. As a result, color temperature and real temperature than the difference between the brightness temperature, radiation temperature and real temperature of shame, high measurement accuracy is 3) Light path of water vapor, carbon dioxide and dust on the wavelength and monochromatic radiation has absorbed under A2, even for absorption, the ratio of monochromatic radiation power ( Brightness than) Less affected to colorimetric pyrometer can be used in harsh environment 2. The structure of the colorimetric pyrometer colorimetric pyrometer according to its structure can be divided into single single and double leading two kinds. 丨 to wds&mdash below; N colorimetric pyrometer for example, this paper introduces the structure principle of double leading colorimetric pyrometer. It USES two optoelectronic devices, Silicon photocell) Separately receive two different wavelengths of monochromatic radiation power plant its light path system is shown in figure 2 _61 p measured object of radiant energy by the objective lens to focus on 4 hole mirror 5, 6 by lens form parallel light projected onto the spectroscope 7. Spectroscope make long wave ( Infrared) Part through, and short wave ( Or visible light) Part of the reflection. Long wave and short wave part respectively by with an infrared optical filter and optical filter absorbed by silicon photocell 8, 9, is converted into electrical signals to halo measurement circuit. Hole mirror edge complex polishing, plating, besides opening other parts to people to shoot the light reflex reflector 1, then through like 2, 3 for the human eye cat double eyepiece lens single colorimetric pyrometer has simple structure, easy to use, but two silicon photocell should keep properties | and does not occur to time-varying is finer than shed radiation temperature measurement in: I ride temperature measurement occupies very important position in the I but as mentioned earlier, most of the radiation thermometer can measure the real temperature I if you would like to get the real temperature, the modification of measured surface emissivity is must. But the emissivity is unpredictable, this gives correct j and cause great difficulties in front reflector radiation thermometer temperature measurement, basic _ can eliminate the influence of the emissivity for as long as the measured surface emissivity is greater than zero. 6 ( Don't need to know the exact value) Can directly measure the real temperature & rsquo; Without any correction. Front reflector structure as shown in figure 2 _62 radiation thermometer, 6 surface of measured object and hemisphere of reflector 5 sealed cavity, from the measured object surface energy emitted by the inner surface of reflector after multiple reflection, through 4 lens gathered 2 holes in the top of the reflector irradiation on thermopile 1.

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