High-speed dynamic total temperature measurement system and method based on fiber fabry-perot combination

Abstract

The application discloses a high-speed dynamic total temperature measuring system and method based on a fiber Fabry-Perot combination, and the system comprises a laser, a high-speed dynamic total temperature probe based on the fiber Fabry-Perot combination, a coupler, a circulator, and a high-speed signal acquisition and processing module. The method comprises the following steps: 1) the laser emits incident light, which is propagated to the oblique end surface high-speed dynamic total temperature probe through the coupler and the circulator, is reflected by the oblique end surface, and reaches the first Fabry-Perot cavity and the second Fabry-Perot cavity; and 2) the data acquisition and processing module collects and demodulates the light reflected by the first Fabry-Perot cavity and the second Fabry-Perot cavity, converts the light signal carrying temperature information into flow field temperature information, and transmits the flow field temperature information to a host computer for display. The application not only can realize high-speed dynamic temperature measurement, but also has the advantages of small size, real-time compensation of dynamic temperature and the like.

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