Ceramic sheath of fiber high temperature detector

Abstract

The invention discloses a ceramic sheath of a fiber high temperature detector, and belongs to the technical field of temperature detection. A sapphire fiber in which a temperature sensitive blackbody cavity is sputtered at the end portion and a ceramic sheath are included, the sapphire fiber penetrates into a fiber hole of the ceramic sheath, the diameter of the fiber hole matches that of the sapphire fiber, one end of the ceramic sheath is provided with a protective chamber, and one end of the blackbody cavity of the sapphire fiber is placed in the protective chamber. According to the invention, the blackbody cavity of the sapphire fiber is arranged in the protective cavity of the ceramic sheath, protection requirements are met, the blackbody cavity of the sapphire fiber makes full contact with a measured medium, and the instantaneity and accuracy of measurement are ensured; a fiber butt-joint structure is arranged in the sheath to reduce the utilization amount of the sapphire fiber and the manufacture cost; and the ceramic sheath is simple in structure, easy to prepare and suitable for batch production.

Description

technical field [0001] The invention belongs to the technical field of temperature detection, and in particular relates to a ceramic sheath of an optical fiber high temperature detector. Background technique [0002] With the development of fiber optic technology and the demand for temperature measurement, sapphire fiber optic temperature detectors (sensors) have been widely used. After reaching the thermal balance, the high temperature resistant sapphire fiber is used to transmit the thermal radiation of the high temperature black body cavity, the radiation signal is measured and the temperature value is converted to a contact temperature sensor. [0003] The black body cavity is the thermal sensitive element in the sapphire high temperature fiber optic sensor, which converts the thermal signal of the measured environment into an optical signal. Since the black body radiation cavity is in direct contact with the high temperature environment to be measured, the firmness of ...

AI Technical Summary

Problems solved by technology

Since the black body radiation cavity is in direct contact with the high temperature environment to be measured, the firmness of the black body cavity coating on the sapphire fiber determines the life of the sensor. Due to the uncertainty of the measurement environment and improper transportation, installation or operation by the user, it may Cause damage to the membrane layer of the black body cavity, seriously affect the measurement accuracy, or even scrap

The sapphire high-temperature optical fiber sensor uses sapphire optical fiber to conduct thermal radiation signals. Since sapphire optical fiber is expensive, if the sensor uses sapphire optical fiber as a whole, the cost will be much higher

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