Program of Electrical and Communications Engineering, Feng-Chia University, Taichung 40724, Taiwan.
Department of Electrical Engineering, Feng-Chia University, 100 Wen-hwa Rd., Seat-wen, Taichung 40724, Taiwan.
Sensors (Basel). 2018 Jul 10;18(7):2213. doi: 10.3390/s18072213.
A novel fiber anemometer based on two pairs of fiber gratings is experimentally demonstrated and can simultaneously detect wind speed and wind direction. One pair of gratings, which are separated by 90° in space, is fixed on a small stainless steel pipe driven by a rotating disc for measuring the wind-direction angle. The other pair is composed of a sensing and a matched grating. The frequency of the spectrum-shifted of the sensing grating to overlap with that of the matched grating is employed for determining the wind speed. The errors in the wind-speed and wind-angle measurements are experimentally demonstrated to be less than 1%. The proposed fiber anemometer with a simple and durable structure can be applied in wind-powered electricity generators.
一种基于两对光纤光栅的新型光纤风速风向传感器被实验验证，它可以同时测量风速和风向。一对光纤光栅被固定在一个由旋转圆盘驱动的小不锈钢管上，彼此之间相差 90°，用于测量风向角。另一对由传感光栅和匹配光栅组成。传感光栅的光谱移动频率与匹配光栅的光谱移动频率相重叠，用于确定风速。实验证明风速和风向测量的误差小于 1%。该光纤风速风向传感器结构简单、耐用，可应用于风力发电机中。
