Fiber optical temperature compensated anemometer based on dual Fabry-Perot sensors with sealed cavity

作者：Chao Wang, Xuezhi Zhang, Junfeng Jiang, Kun Liu, Shuang Wang, Rundong Wang, Yuanyao Li, Tiegen Liu · 发表于：Optics Express · 年份：2019 · DOI：10.1364/oe.27.018157 · 被引用次数：20 · 研究领域：Advanced Fiber Optic Sensors、Advanced Sensor Technologies Research、Flow Measurement and Analysis

A fiber optical anemometer using dual Fabry-Perot sensors with sealed cavity is proposed for high-speed airflow measurement. The airflow velocity is measured based on principle of differential pressure, and temperature compensation is realized by reference F-P sensor to improve measurement accuracy and environmental adaptability. The location of dual F-P sensors in the airflow field and quadratic functional relation between differential pressure and airflow velocity are obtained by the simulation of turbulence model. F-P sensors in this experiment can be employed to measure pressure from 100kPa to 107kPa and temperature from 5°C to 50°C. The full-scale error of F-P sensors is less than 0.53% by calibration. It is demonstrated experimentally this fiber optical anemometer is qualified for measuring air velocity in the range of 7.9-81m/s with velocity error less than 0.69%. The device has the potential to measure high speed airflow in various applications.