Dual-wavelength radiation temperature measurement device and method

Abstract

The invention discloses a dual-wavelength radiation temperature measurement device and method. The device comprises an optical lens used for focusing radiation light beams of a to-be-measured object on a semi-transmitting semi-reflecting beam splitting system. The semi-transmitting semi-reflecting beam splitting system comprises a semi-transmitting semi-reflecting beam splitting piece used for splitting the radiation light beams into transmitting light beams and reflecting light beams, the transmitting light beams and the reflecting light beams are received by sensors, and optical radiation measuring signals are generated. A data acquisition and analysis unit and an error evaluation system calculate the temperature value of the to-be-measured object according to the optical radiation measuring signals, and the temperature value error is predicted and evaluated. The method includes the following steps that looseness approach is carried out to acquire a corrected dual-wavelength temperature; single-color probability approach is carried out to acquire a single-color probability average temperature; averaging is carried out to acquire the average of the corrected dual-wave-length temperature and the single-color probability average temperature. High-precision measurement of gray body surface or non-gray surface temperatures is achieved under the condition that emissivity behaviorsare unknown, and the error can be conveniently evaluated and predicted based on the measured temperatures.

Description

technical field [0001] The invention relates to optical measurement technology, in particular to a device and method suitable for measuring the surface temperature of an object with non-gray body characteristics without colorimetric solution. Background technique [0002] In petrochemical, metallurgy, steel, cement, glass, power plants and other industrial production fields, temperature measuring instruments based on radiation measurement have huge market demand and broad application prospects. In these application fields, the traditional thermocouple contact temperature measurement method is gradually being replaced by non-contact optical temperature measurement equipment with lower price and more stable performance due to the limitation of measurement and high cost of material consumption. The signal-to-noise ratio of multi-wavelength temperature measurement is low, the emissivity behavior is difficult to determine, the stability of temperature inversion is poor, and the m...

AI Technical Summary

Problems solved by technology

The signal-to-noise ratio of multi-wavelength temperature measurement is low, the emissivity behavior is difficult to determine, the stability of temperature inversion is poor, and the measurement error of monochromatic temperature measurement may be large under the condition of unknown emissivity

The colorimetric thermometry method based on dual-wavelength radiation measurement has the advantages of both, but is limited to the measurement of gray body surface temperature

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