Double-screen air suction type sapphire optical fiber high temperature sensor

Abstract

The invention belongs to temperature sensors for high temperature measurement, and relates to a double-screen air suction type sapphire optical fiber high temperature sensor. The double-screen air suction type sapphire optical fiber high temperature sensor is suitable for measuring airflow temperature in the temperature zone of 1,300 K to 2,000 K. The high temperature sensor is composed of sapphire optical fibers with black cavities, a precious metal shielding cover, single-core multi-mode silica optical fibers, a photovoltaic conversion and data processing system and the like. In order to guarantee the accuracy of high temperature airflow temperature measurement, the precious metal shielding cover is designed to be of a double-screen air suction type structure to reduce heat transfer errors and speed errors. The advantages of being accurate in temperature measurement, fast in response, high in anti-electromagnetic interference capacity and the like are achieved, and the aim of high temperature measurement under the high-temperature high-speed airflow environment in the temperature zone of 1,300 K to 2,000 K can be achieved.

Description

technical field [0001] The invention belongs to a temperature sensor for high-temperature measurement, and relates to a double-screen suction type sapphire optical fiber high-temperature sensor, which is suitable for airflow temperature measurement in a temperature range of 1300K to 2000K. Background technique [0002] At present, the sensors used to measure the temperature of high-temperature air flow generally use platinum-rhodium series thermocouples, and the maximum temperature that can be measured is 2000K. At present, in the fields of aviation, aerospace, nuclear industry, etc., the temperature measurement environment involved is becoming more and more Complicated, some airflow high-temperature measurement occasions with electromagnetic interference, because the thermocouple of traditional temperature measurement is easily disturbed, there is a lack of accurate and effective means of temperature measurement. [0003] With the development of radiation temperature measur...

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Problems solved by technology

[0002] At present, the sensors used to measure the temperature of high-temperature air flow generally use platinum-rhodium series thermocouples, and the maximum temperature that can be measured is 2000K. At present, in the fields of aviation, aerospace, nuclear industry, etc., the temperature measurement environment involved is becoming more and more Complicated, some airflow high-temperature measurement occasions with electromagnetic interference, because the thermocouple of traditional temperature measurement is easily disturbed, there is a lack of accurate and effective temperature measurement means

[0003] With the development of radiation temperature measurement technology, many research institutions at home and abroad have developed radiation thermometers with fiber optic probes, but most sensors have a low temperature measurement range and slow response speed, which are far from meeting the requirements of transient temperature measurement.

Domestic related research work is mostly focused on static high-temperature testing, and dynamic testing research for airflow temperature measurement is still blank

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