A Probe Temperature Sensing Black Body 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 adopts a box-type structure, the bottom of the temperature-sensing blackbody cavity is hemispherical, and the upper end is cylindrical. Internal threads are processed; the rear end of the temperature-sensitive blackbody cavity is provided with a circular light shield with radiation adjustment holes. The blackbody cavity of the present invention is made of zirconium boride ceramic material with a melting point higher than 3000°C. The characteristics of the radiation signal of the black body cavity are stable, and it is easy to be received and transmitted by the sapphire optical fiber, thereby ensuring the overall performance of the sensor is stable.

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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