Method for measuring temperature in real time

Abstract

The invention provides a method for measuring temperature in real time. The method is characterized in that temperaturemeasurement comprises the following steps: processing radiation lights emitted by a measured object by a light-splitting mechanism to obtain two or more than two multi-wavelength radiation light beams; receiving radiation energies with different wavelength by a photoelectric detector to obtain a radiation energy ratio; calculating corresponding temperature values according to a formula of the blackbody radiation theory; obtaining correction factors of single-wavelength radiation energies by taking a temperature value calibrated by a standard blackbody radiation source in a high-temperature range as a criterion; and calculating the corrected single-wavelength radiation energies to obtain a temperature value in a low-temperature range. The method has the advantages that with the adoption of a multi-wavelength optical temperature measuring technology, measurement errors caused by emissivity of an object surface, a temperature measuring distance, a temperature measuring angle, and environmental factors such as air flows, impurities and the like are reduced, and the temperature measuring accuracy is improved; the measuring accuracy and stability is improved, and the measuring range is widened extremely by the corrected single-wavelength radiation temperature measurement.

Description

technical field [0001] The invention relates to a non-contact temperature measurement method, in particular to a real-time temperature measurement method. Background technique [0002] Temperature measurement methods can be roughly divided into two types: contact method and non-contact method. In the contact temperature measurement method, contact temperature sensors such as thermocouples or thermal resistances are widely used. The advantages of this method are simple structure, reliability, and high accuracy. The disadvantage is that it cannot be used for dynamic temperature measurement. In addition, for For high temperature and ultra high temperature temperature measurement, the contact temperature measurement method is also not competent. At present, the non-contact temperature measurement method is mainly based on radiation temperature measurement method, which has the advantages of wide measurement range, no influence on the measured temperature field and fast response...

AI Technical Summary

Problems solved by technology

Single-wavelength optical pyrometers and full-wavelength radiation thermometers have high sensitivity, high measurement accuracy, and wide temperature measurement range, but the emissivity of the measured object must be known, and the measurement accuracy is easily affected by factors such as measurement distance and environment

A colorimetric thermometer measures temperature by measuring the ratio of the spectral radiance of an object at two or more wavelengths, because the change in the emissivity ratio of the same object at two or more similar wavelengths is relatively small, and the environment and other influencing factors can also be Elimination, so the accuracy of this temperature measurement method is relatively high, but this method needs to select a suitable wavelength, which limits its measurement range. At temperatures below 700 degrees, due to the relatively small radiation energy, the measurement error is relatively large

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