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Important means of infrared thermometer with its response speed fast, accurate, convenient, longer service life and other advantages, widely used in the industries of metallurgy, electronics, petrochemical, food, become fault detection, control of product quality and enhance economic efficiency . Principle to measure infrared thermometry is any object will emit infrared radiation, while the use of radiation in high temperature measurement technology smart online radiation thermometer not only to overcome the deficiencies of the traditional temperature measurement products, but also to achieve the measured accurate non-contact measurement of the object temperature. Intelligent online research in this subject the radiation thermometer belongs in the field of high temperature measurement research. In the temperature range of the initial stage, because the energy of the target radiation is small, the signal is weak, and thus subject to system interference greater impact, particularly if the equivalent of the output signal of the detector size and the size of the zero signal of the system, the influence of the system zero affect the radiation thermometer measurement accuracy of the main factors, how to improve the size of the stage amplifier circuit signal before the system when the initial stage of the measured object temperature measurement range, is an important part of the indispensable. In the research of this subject, using a multi-point calibration and data fitting method of combining the better achieve the pre-amplifying circuit signal in the measuring circuit increased, to achieve a high stability and precision of the temperature measurement. Functional structure, this study smart radiation thermometer into the signal acquisition and processing module, display module, serial communication modules, power modules and four temperature. Infrared sensor signal acquisition using a silicon photodiode infrared detectors, temperature signal sampling, data processing PIC16F877A MCU; intelligent digital display temperature display table; serial communication microcontroller internal module USART universal synchronous / asynchronous transceiver; supply module directly using the AC / DC converter module. As the subject developed smart online radiation thermometer accuracy, high speed, safe and convenient, high performance and low cost, especially for less contact measurement object. Same time the thermometer is applied a unique emission rate calculation method, which can more accurately calculate the emissivity of the measured object, so that the radiation thermometer has a better stability and higher accuracy, so the radiation The thermometer has a very good market prospects.
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