Open AccessHot-Wire Anemometer Based on D-Shaped Optical Fiber
Author(s) -
Elena De Vita,
Pasquale Di Palma,
Sidrish Zahra,
Giuseppina Roviello,
Claudio Ferone,
Agostino Iadicicco,
Stefania Campopiano
Publication year - 2023
Publication title -
ieee sensors journal
Language(s) - English
Resource type - Journals
eISSN - 1558-1748
pISSN - 1530-437X
DOI - 10.1109/jsen.2023.3269661
Subject(s) - signal processing and analysis , communication, networking and broadcast technologies , components, circuits, devices and systems , robotics and control systems
This article proposes a hot-wire anemometer based on optical fiber embedding a fiber Bragg grating (FBG) and having a D-shaped transversal Section on whose flat surface a thin metallic layer has been deposited. Due to this geometrical structure, the optical power flowing through the fiber core can achieve the metallic layer and can be converted into heat. The embedded FBG can measure the resulting temperature increase and the temperature fluctuation of the D-fiber caused by the wind flowing. Numerical simulations have been performed in order to select the appropriate design parameters, such as thickness of the metallic layer and its distance from the core. Then, the fabrication process of the device and the experimental results of its characterization in temperature and wind assess its working principle. The developed sensor can work at low power levels of the source and is characterized by small size and high accuracy. Furthermore, it shows high cost-effectiveness and the possibility to modulate its wind sensitivity by setting the source power.