Radiation measuring tube capable of reducing temperature measurement errors based on cooling method

Abstract

The invention relates to the field of thermotechnical measurement, in particular to a radiation measuring tube capable of reducing temperature measurement errors based on a cooling method. The measuring tube comprises a radiation measuring tube arranged inside a high-temperature furnace and a thermodetector arranged outside the high-temperature furnace, wherein a diaphragm is arranged between the output end of the radiation measuring tube and the input end of the thermodetector. A light shield is installed at the detection end of the radiation measurement tube, a first cooling water pipe is arranged in an interlayer of the radiation measurement tube and a shell of the light shield, and a second cooling water pipe is arranged in an interlayer of a shell of the thermodetector; and the measurement precision is improved by reducing the temperature of the inner wall of the radiation measurement tube and reducing background radiation interference in a furnace.

Description

technical field [0001] The invention relates to the field of thermal measurement, in particular to a radiation measuring tube for reducing temperature measurement errors based on a cooling method. Background technique [0002] In the radiation temperature measurement process of smooth metal moving in a high-temperature furnace such as a continuous annealing furnace, two problems need to be solved: first, accurately calculate the emissivity compensation of the target, and second, eliminate the background radiation noise of the furnace. We installed a single-band infrared thermometer outside the furnace. As the furnace temperature increases, the noise radiation in the furnace also increases, and it is the noise radiation of the whole band. As the temperature changes, the interference radiation The proportion will be further increased. If we do not process the interference signal in this band, the temperature signal output by the detector will contain this interference signal, ...

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Problems solved by technology

We installed a single-band infrared thermometer outside the furnace. As the furnace temperature increases, the noise radiation in the furnace also increases, and it is the noise radiation of the whole band. As the temperature changes, the interference radiation The proportion will be further increased. If we do not process the interference signal in this band, the temperature signal output by the detector will contain this interference signal, and the temperature measurement accuracy will be greatly reduced.

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