Probe temperature-sensing blackbody cavity for sapphire optical fiber temperature sensor

Abstract

The invention provides a probe temperature-sensing blackbody cavity for a sapphire optical fiber temperature sensor, wherein the inner structure of the temperature-sensing blackbody cavity is in a box type structure; the bottom of the temperature-sensing blackbody cavity is semi-spherical, and the upper end of the temperature-sensing blackbody cavity is cylinder-shaped; an internal thread is processed at the opening of the temperature-sensing blackbody cavity; the rear end of the temperature-sensing blackbody cavity is provided with a circular light blocking sheet with a radiation adjusting hole. The blackbody cavity disclosed by the invention is prepared from a zirconium boride ceramic material with the melting point of more than 3000 DEG C. The radiation signals of the blackbody cavity are stable in feature, and are easy for sapphire optical fibers to receive and transmit, thus stable whole performance of the sensor is ensured.

Description

technical field [0001] The invention belongs to the technical field of temperature measurement, and in particular relates to a probe temperature-sensing black body cavity of an improved sapphire optical fiber temperature sensor. Background technique [0002] The sapphire optical fiber temperature sensor is a kind of artificially constructed black body cavity in contact with the measured environment to achieve thermal equilibrium according to Planck's law, and then uses high temperature resistant sapphire optical fiber to transmit the thermal radiation of the high temperature black body cavity, measures the radiation signal and converts the temperature Numeric contact temperature sensor. [0003] The sapphire fiber temperature sensor utilizes the high melting point of the sapphire fiber and the good light transmission characteristics under high temperature conditions. The sputtering film method is used to construct a temperature-sensitive blackbody cavity at the end of the sa...

AI Technical Summary

Problems solved by technology

[0004] Since the sapphire fiber is in a temperature environment above 1700°C, the surface will be degraded due to high temperature, which will affect the temperature measurement accuracy and long-term stability

Even after the relevant anti-deterioration treatment, the upper limit of the sapphire optical fiber temperature can only be increased to 1800°C, which results in the upper limit of the temperature measurement of the traditional sapphire optical fiber temperature sensor being limited to 1800°C

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