Optical fiber Fabry-Perot total temperature probe for dynamic total temperature measurement and manufacturing method thereof

Abstract

The invention discloses an optical fiber Fabry-Perot total temperature probe for dynamic total temperature measurement and a manufacturing method thereof. The probe comprises a capillary steel tube (1), a transmission optical fiber (2) and a high thermo-optical coefficient film (3). The method comprises the following steps: 1) forming a first gap in the side surface of the transmission optical fiber (2), wherein the gap extends to the end surface of a first extension end; 2) plating a layer of high-thermal-optical-coefficient film at the gap of the transmission optical fiber (2), and forming an optical fiber-film integrated structure; 3) forming an optical fiber Fabry-Perot cavity on the surface of the gap of the transmission optical fiber and the surface of the high-thermal-optical-coefficient film; 4) processing the end face of the second extension end of the optical fiber-film integrated structure to form an inclined end face (7); 5) placing the transmission optical fiber (2) in the capillary steel tube (1); and 6) putting the processed optical fiber Fabry-Perot probe for dynamic total temperature measurement into a high-temperature furnace, and performing staged curing. The optical fiber Fabry-Perot probe disclosed by the invention not only can realize high-speed dynamic temperature measurement, but also has the advantages that the size is small, the rear-end optical fiber does not need to be bent and the like.

Description

technical field [0001] The invention relates to the field of temperature sensing and measurement, in particular to an optical fiber method-perco total temperature probe for dynamic total temperature measurement and a manufacturing method thereof. Background technique [0002] The temperature parameter measurement of high-speed high-temperature airflow plays an important role in many fields such as aviation and national defense. Especially in the aerospace field, the measurement of airflow temperature at the air inlet of an aeroengine is particularly important. This temperature is a key to measure the quality of the engine. Parameters are related to the stability and safety of aircraft operation. [0003] At present, the most common method for the measurement of high-speed and high-temperature airflow at home and abroad is to use the thermocouple total temperature probe with stagnation cover structure, but because the thermocouple total temperature probe belongs to the electr...

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Problems solved by technology

[0006] In order to avoid the breakage of the fiber caused by side blowing, this technology uses the method of adding a support rod to face the end face of the fiber in the direction of the air flow. The bending of the rear end of the fiber is inevitable, which may affect the temperature measurement effect, and if multi-point measurement, each fiber Installed independently, the overall sensor size will increase, and the difficulty of assembly will also increase

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