Journal
OPTICS EXPRESS
Volume 27, Issue 13, Pages 18157-18168Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.27.018157
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Funding
- National key research and development plan of China [2016YFC0401902]
- National Natural Science Foundation of China [U1833104, 61735011, 61675152, 61405139]
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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 degrees C to 50 degrees 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. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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