Flexible LC-Type Wind Speed Sensor With Its Readout Circuit

被引:3
作者
Cheng, Xingquan [1 ]
Yi, Zhenxiang [1 ]
Qin, Ming [1 ]
Huang, Qing-An [1 ]
机构
[1] Southeast Univ, Key Lab MEMS, Minist Educ, Nanjing 210096, Peoples R China
基金
中国国家自然科学基金;
关键词
Sensors; Wind speed; Substrates; Resonant frequency; Inductors; Inductance; Capacitance; Wind speed sensor; flexible; LC-type; readout circuit; THERMAL FLOW SENSOR;
D O I
10.1109/JSEN.2021.3098034
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
A novel flexible LC-type wind speed sensor, as well as its readout circuit, is proposed in this paper. Two inductors are designed on both surface of the flexible substrate, connecting by a parallel plate capacitor. Hence, substrate bending induced by wind can change the total inductance, then shifting the resonant frequency of this LC-type speed sensor. The readout circuit is designed and realized on the PCB board. The LC-type sensor is tested in the wind tunnel and the readout circuit outputs the frequency spectrum. The experiments demonstrate that the resonant frequency increases with the wind speed up to 25m/s. The measured sensitivity is close to 39.8kHz/(m/s), 50.8kHz/(m/s) and 57.7kHz/(m/s) for the sensor with windward height of 30mm, 40mm and 50mm, respectively. Although large windward height can improve the sensitivity, it's easy to saturate and the maximum detectable speed is reduced.
引用
收藏
页码:19857 / 19862
页数:6
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