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Sensors 2017, 17(3), 593; doi:10.3390/s17030593

A Novel High-Performance Beam-Supported Membrane Structure with Enhanced Design Flexibility for Partial Discharge Detection

1
State Grid Shanghai Electric Power Research Institute, Shanghai 200437, China
2
Key Laboratory of Micro/Nano Systems for Aerospace (Ministry of Education), Northwestern Polytechnical University, Xi’an 710072, China
3
Key Laboratory of Micro- and Nano-Electro-Mechanical Systems of Shaanxi Province, Northwestern Polytechnical University, Xi’an 710072, China
4
Xi’an Maorong Power Equipment Co., Ltd., Xi’an 710048, China
*
Author to whom correspondence should be addressed.
Academic Editor: Vittorio M. N. Passaro
Received: 12 January 2017 / Revised: 11 March 2017 / Accepted: 13 March 2017 / Published: 15 March 2017
(This article belongs to the Section Physical Sensors)
View Full-Text   |   Download PDF [4486 KB, uploaded 15 March 2017]   |  

Abstract

A novel beam-supported membrane (BSM) structure for the fiber optic extrinsic Fabry-Perot interferometer (EFPI) sensors showing an enhanced performance and an improved resistance to the temperature change was proposed for detecting partial discharges (PDs). The fundamental frequency, sensitivity, linear range, and flatness of the BSM structure were investigated by employing the finite element simulations. Compared with the intact membrane (IM) structure commonly used by EFPI sensors, BSM structure provides extra geometrical parameters to define the fundamental frequency when the diameter of the whole membrane and its thickness is determined, resulting in an enhanced design flexibility of the sensor structure. According to the simulation results, it is noted that BSM structure not only shows a much higher sensitivity (increased by almost four times for some cases), and a wider working range of fundamental frequency to choose, but also an improved linear range, making the system development much easier. In addition, BSM structure presents a better flatness than its IM counterpart, providing an increased signal-to-noise ratio (SNR). A further improvement of performance is thought to be possible with a step-forward structural optimization. The BSM structure shows a great potential to design the EFPI sensors, as well as others for detecting the acoustic signals. View Full-Text
Keywords: optical fiber sensors; Fabry-Perot interferometer; beam-supported membrane; partial discharges (PDs) optical fiber sensors; Fabry-Perot interferometer; beam-supported membrane; partial discharges (PDs)
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Fu, C.; Si, W.; Li, H.; Li, D.; Yuan, P.; Yu, Y. A Novel High-Performance Beam-Supported Membrane Structure with Enhanced Design Flexibility for Partial Discharge Detection. Sensors 2017, 17, 593.

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