Method for measuring temperature in real time

A real-time measurement and temperature measurement technology, applied in the directions of radiation pressure and radiometer effect, which can solve the problems of large measurement error, limited measurement range, and measurement accuracy impact.

Active Publication Date: 2013-01-23
广东众元半导体科技有限公司
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  • Abstract
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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

Method used

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  • Method for measuring temperature in real time
  • Method for measuring temperature in real time
  • Method for measuring temperature in real time

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The steps of this implementation method are as follows: the radiation light emitted by the measured object 1 passes through a modulation disc 2, and the modulation disc is equipped with two filters 2, 3 with different wavelengths, and the modulation disc 2 rotates the filters 2, 3 respectively by rotating to the optical path, so that the radiated light passes through different filters at different times to form radiation beams of different wavelengths, and the photodetector 5 receives the radiated light energy of different wavelengths, and passes through the processor in the circuit system 6 using the theoretical formula of blackbody radiation Calculation, the radiant energy ratio can be calculated, and according to the corresponding relationship between the radiant energy ratio and temperature, the tested temperature value is given, and the correction coefficient required for single-wavelength radiant energy temperature measurement is calculated through the tested temper...

Embodiment 2

[0032] Embodiment 2 is the same as Embodiment 1, the difference is that the radiation light emitted by the measured object 1 is firstly divided into two light beams by the beam splitter 8, filtered by the filter 9 and the filter 10 respectively, and then passed through a A reticle 11 of apertures and mirrors projects onto the photodetector 5 .

Embodiment 3

[0034] Embodiment 3 is the same as Embodiment 1, except that the radiation light emitted by the measured object 1 is divided into two independent beams by the beam splitter 12, and then divided into two beams of different wavelengths by two filters 13 and 14 of different wavelengths. Afterwards, the light energy is received by the photodetector 15 and the photodetector 16 respectively.

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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...

Claims

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Application Information

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IPC IPC(8): G01J5/46
Inventor 甘志银关国坚
Owner 广东众元半导体科技有限公司
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