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High-temperature sensor for metal tubular black body hollow cavity

A technology of temperature sensor and blackbody cavity, which is applied in the field of temperature sensor for high temperature measurement, can solve the problems of lack of temperature measurement means, etc., and achieve the effect of high temperature resistance, reliable performance, and small comprehensive temperature measurement error

Active Publication Date: 2015-07-01
BEIJING CHANGCHENG INST OF METROLOGY & MEASUREMENT AVIATION IND CORP OF CHINA
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  • Application Information

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Problems solved by technology

Due to the high temperature, there is a lack of accurate and effective means of temperature measurement

Method used

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  • High-temperature sensor for metal tubular black body hollow cavity

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Embodiment

[0027] Metal tubular blackbody cavity high temperature temperature sensor, including blackbody cavity 1, shielding cover 2, coupler 3, transmission fiber 4, spectroscopic detection system 5 and data processing system 6; between blackbody cavity 1 and coupler 3, shielding cover 2 and coupler 3 are connected by thread, and the outer surface of the thread connection is coated with high-temperature sealant to ensure that the thread connection does not rotate in the circumferential direction, and at the same time avoid light leakage;

[0028] Both the black body cavity 1 and the shielding cover 2 are made of metal iridium. Before forming, the metal iridium needs to be forged and hot-rolled to improve its comprehensive mechanical properties. The direction of the tissue fibers after pressure processing is parallel to the direction of the normal stress;

[0029] The head of the outer surface of the black body cavity 1 is designed as a fin structure, and the number of fins is 3 to enhan...

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Abstract

The invention relates to a high-temperature sensor for a metal tubular black body hollow cavity and belongs to the technical field of temperature sensors for measurement of high temperatures. The high-temperature sensor for the metal tubular black body hollow cavity comprises the black body hollow cavity, a shielding cover, a coupler, transmission optical fibers, a light splitting detection system and a data processing system, wherein the head portion of the outer surface of the black body hollow cavity is arranged to be in a rib-piece type structure according to the design, and the black body hollow cavity is arranged to be in a blind hole form according to the design. The black body hollow cavity made of high-temperature resistant metal materials is used as a to-be-sensed portion of the high-temperature sensor, the silica optical fibers are used for transmitting signals, a double silicon detector is used for splitting light and conducting photoelectric conversion, and therefore the high-temperature sensor for the metal tubular black body hollow cavity is compact in structure and reliable in performance. In addition, the shielding cover is arranged outside the black body hollow cavity according to the design; and combined with the special-shaped structure of the black body hollow cavity and through theoretical analysis and numerical calculation, the high-temperature sensor for the metal tubular black body hollow cavity has the advantages of being good in high-temperature resistance, oxidation resistant, high in accuracy and the like, and can solve the high-temperature measuring problem which cannot be solved at present.

Description

technical field [0001] The invention relates to a high-temperature temperature sensor with a metal tubular blackbody cavity, in particular to a high-temperature temperature sensor based on a metal tubular blackbody cavity suitable for long-term temperature measurement below 2300K, and belongs to the technical field of temperature sensors for high-temperature measurement. Background technique [0002] At present, the sensors used to measure the temperature of high-temperature airflow in China generally use platinum-rhodium series thermocouples, and the highest temperature that can be measured is 2000K. [0003] US patent specification US5364186 discloses a high-temperature sensor based on a black body cavity. The sensor coats a layer of metal oxide ceramics on the surface of an optical fiber by means of flame spraying or sputtering to form a black body cavity. Guide the light, pass through the detector, signal processing system, etc., and finally get the temperature signal. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J5/04G01J5/08
Inventor 赵俭武建红杨永军王鹏
Owner BEIJING CHANGCHENG INST OF METROLOGY & MEASUREMENT AVIATION IND CORP OF CHINA
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