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Membrane electrodes, also known as p-ion electrodes, use membranes that selectively interact with free analyte ions, generating a potential difference across the membrane. The resulting membrane potential, known as the asymmetry potential, is not zero even when analyte concentrations on both sides of the membrane are equal. The membrane's response is typically not selective to a single analyte but proportional to the concentration of all ions in the sample solution capable of interacting at...
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A Novel High-Performance Beam-Supported Membrane Structure with Enhanced Design Flexibility for Partial Discharge

Chenzhao Fu1, Wenrong Si2, Haoyong Li3,4

  • 1State Grid Shanghai Electric Power Research Institute, Shanghai 200437, China. 13512111246@139.com.

Sensors (Basel, Switzerland)
|March 16, 2017
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Summary

A new beam-supported membrane structure enhances fiber optic sensors for detecting partial discharges. This design offers improved sensitivity, a wider frequency range, and better temperature resistance for advanced acoustic signal detection.

Keywords:
Fabry-Perot interferometerbeam-supported membraneoptical fiber sensorspartial discharges (PDs)

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Area of Science:

  • Optical sensing technologies
  • Materials science and engineering
  • Electrical engineering and power systems

Background:

  • Fiber optic extrinsic Fabry-Perot interferometer (EFPI) sensors are crucial for detecting partial discharges (PDs).
  • Existing EFPI sensor structures, like the intact membrane (IM), have limitations in performance and environmental resistance.
  • There is a need for improved sensor designs to enhance sensitivity, linearity, and temperature stability.

Purpose of the Study:

  • To propose and investigate a novel beam-supported membrane (BSM) structure for EFPI sensors.
  • To evaluate the performance enhancements of the BSM structure compared to the traditional IM structure.
  • To assess the suitability of the BSM structure for detecting partial discharges and other acoustic signals.

Main Methods:

  • Finite element simulations were employed to analyze the BSM structure.
  • Key performance metrics including fundamental frequency, sensitivity, linear range, and flatness were investigated.
  • The BSM structure's geometrical parameters were explored for design flexibility.

Main Results:

  • The BSM structure demonstrated significantly higher sensitivity, up to four times greater in some cases.
  • Enhanced design flexibility was achieved through additional geometrical parameters in the BSM structure.
  • The BSM structure exhibited improved linearity, better flatness, and a wider fundamental frequency range compared to the IM structure, leading to a higher signal-to-noise ratio (SNR).

Conclusions:

  • The novel BSM structure offers superior performance for EFPI sensors used in partial discharge detection.
  • The BSM structure provides enhanced sensitivity, linearity, and environmental resistance, simplifying system development.
  • This innovative design holds great potential for advancing EFPI sensors and other acoustic signal detection applications.