为提高热线式光纤风速计的性能, 在金属膜光纤布喇格光栅(FBG)热线式光纤风速计的基础上, 通过减小FBG的包层厚度, 使风速计的FBG包层直径从125 μm减小到71.6 μm, 并将这种薄包层FBG热线式光纤风速计与FBG常规风速计进行对比实验。结果表明: 薄包层FBG热线式光纤风速计的初始温度提高了43.4％; 风速测量的灵敏度显著提高了61.2％; 受使用的风洞限制, 风速最大测试范围为20 m/s。

In order to improve the performance of the hot wire fiber anemometer, based on the metal film fiber Bragg grating(FBG) hot wire fiber anemometer, the FBG cladding diameter of the anemometer is reduced from 125 μm to 71.6 μm by reducing the thickness of the FBG cladding, the thin cladding FBG hot wire optical fiber anemometer is compared with FBG conventional anemometer. The results show that the initial temperature of FBG hot wire fiber anemometer is increased by 48.3%, the sensitivity of airflow velocity measurement is significantly increased by 61.2%, and limited by the wind tunnel used, the maximum wind speed test range is 20 m/s.