Open AccessFiber optical temperature compensated anemometer based on dual Fabry-Perot sensors with sealed cavity
Author(s) -
Chao Wang,
Xuezhi Zhang,
Junfeng Jiang,
Shuang Wang,
Rundong Wang,
Yuanyao Li
Publication year - 2019
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.27.018157
Subject(s) - anemometer , airflow , optics , fabry–pérot interferometer , airspeed , flow measurement , materials science , optical fiber , calibration , acoustics , temperature measurement , fiber optic sensor , pressure measurement , turbulence , physics , mechanics , meteorology , wavelength , quantum mechanics , thermodynamics
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.