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.
Highlights
A Novel High-Performance Beam-SupportedChenzhao Fu 1,† , Wenrong Si 1,† , Haoyong Li 2,3,† , Delin Li 2,3 , Peng Yuan 4 and Yiting Yu 2,3, *
The occurrence of partial discharges (PDs) within power transformers is prone to cause insulation breakdown, which can lead to catastrophic accidents including casualties and a huge loss in economy [1]
extrinsic Fabry-Perot interferometer (EFPI) sensors with a better and an improved natural to frequency, sensitivity, linear range, and flatness were investigated in detailnatural and compared resistance the temperature change was suggested, and its performances including frequency, sensitivity, linear range, and flatness were investigated in detail and compared with the intact membrane (IM) structure
Summary
Chenzhao Fu 1,† , Wenrong Si 1,† , Haoyong Li 2,3,† , Delin Li 2,3 , Peng Yuan 4 and Yiting Yu 2,3, *. Key Laboratory of Micro/Nano Systems for Aerospace (Ministry of Education), Northwestern Polytechnical. Key Laboratory of Micro- and Nano-Electro-Mechanical Systems of Shaanxi Province, Northwestern Polytechnical University, Xi’an 710072, China.
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