A wireless air flow sensor powered by a wind-induced vibration energy harvester

被引：0
|
作者：
He X.-F. [1 ,3 ]
Qi R. [1 ]
Cheng Y.-Q. [1 ,2 ]
Zhang C. [1 ]
Shang Z.-G. [1 ,2 ]
Yang X.-K. [1 ]
机构：
[1] Key Laboratory of Optoelectronic Technology and Systems of the Education Ministry of China, Chongqing University, Chongqing
[2] 24th Institute of China Electronics Technology Group Corporation, Chongqing
[3] Microsystem Research Center, Chongqing University, Chongqing
来源：
| 1600年 / Nanjing University of Aeronautics an Astronautics卷 / 30期
关键词：
Anemometer; Energy harvesting; Self-powered; Wind-induced vibration; Wireless sensing;
D O I：
10.16385/j.cnki.issn.1004-4523.2017.02.015
中图分类号：
学科分类号：
摘要：
According to the requirements of the meteorological observation and running state monitoring of coal mines, tunnels, ventilating ducts and etc., a self-powered wireless air flow sensor was developed. The self-powered wireless sensor includes two piezoelectric wind energy harvesters similar to harmonicas. A harvester is used to scavenge wind energy and the other is used to measure the wind speed. When wind speed is in a specified range, the reeds of the harvesters vibrate dramatically and convert the wind energy into electrical energy. As the vibration frequencies of the reeds decrease monotonically with the wind speed, the wind speed can be obtained by measuring the vibration frequencies of the reeds after the relationship between the wind speed and the vibration frequencies of the harvesters has been established. The experimental results show that the self-powered wireless air flow sensor worked normally with the sensitivity of about 1.45 Hz·s /m when wind speed was between 8.5 m/s and 12.1 m/s. The sensor measured and transmitted the wind speed signal every 30 s when wind speed was 12 m/s. It satisfies the requirements for air flow sensors in many environments such as in ventilating ducts. © 2017, Nanjing Univ. of Aeronautics an Astronautics. All right reserved.
引用
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页码：290 / 296
页数：6
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