Imperial College London
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ProfessorAndrewHolmes

Faculty of Engineering, Department of Electrical and Electronic Engineering

Professor of Microelectromechanical Systems
 
 
 
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Contact

 

+44 (0)20 7594 6239a.holmes Website

 
 
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Assistant

 

Ms Susan Brace +44 (0)20 7594 6215

 
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Location

 

701Electrical EngineeringSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Shi:2020:10.1063/5.0012244,
author = {Shi, M and Holmes, A and Yeatman, E},
doi = {10.1063/5.0012244},
journal = {Applied Physics Letters},
title = {Piezoelectric wind velocity sensor based on the variation of galloping frequency with drag force},
url = {http://dx.doi.org/10.1063/5.0012244},
volume = {116},
year = {2020}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - In this paper, we demonstrate a miniature energy harvesting wind velocity sensor of simple, low-cost construction, based on a single-degree-of-freedom galloping structure. The sensor consists of a prismatic bluff body with a triangular cross section attached to the free end of acantilever incorporating a commercial polyvinylidene fluoride piezoelectric film. In the wind, the bluff body causes vibration of the cantileverbased on galloping, and the piezoelectric film converts the vibration energy into an electrical signal. We have observed a negative correlationbetween the wind velocity and the vibration frequency, and we demonstrate that this relationship can be used to detect wind velocity directlywith useful accuracy. A simple theoretical model indicates that the frequency shift can be accounted for by the effect of the axial loading dueto form drag. The model shows close agreement with the experimental results. In wind tunnel tests, a prototype wind velocity sensor basedon this principle could measure wind velocities from 4.45 to 10 m/s, with the measured velocity typically being within 4% of the referencevalue obtained using a Pitot tube.
AU  - Shi,M
AU  - Holmes,A
AU  - Yeatman,E
DO  - 10.1063/5.0012244
PY  - 2020///
SN  - 0003-6951
TI  - Piezoelectric wind velocity sensor based on the variation of galloping frequency with drag force
T2  - Applied Physics Letters
UR  - http://dx.doi.org/10.1063/5.0012244
UR  - http://hdl.handle.net/10044/1/80997
VL  - 116
ER  -
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