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A novel optical fiber acceleration sensor using a push-pull structure significantly improves sensitivity and lateral anti-interference. This enhanced sensor offers better performance for applications in exploration, defense, and safety.

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Area of Science:

  • Optoelectronics
  • Sensor Technology
  • Mechanical Engineering

Background:

  • Acceleration measurement is critical in diverse fields like resource exploration, defense, safety, and disaster management.
  • Existing optical fiber acceleration sensors suffer from low sensitivity and poor lateral anti-interference capabilities.
  • Addressing these limitations is crucial for advancing sensing technologies.

Purpose of the Study:

  • To propose and develop a Michelson interference type optical fiber acceleration sensor with a push-pull structure.
  • To theoretically analyze and computationally model the proposed sensor design.
  • To experimentally validate the sensor's performance characteristics.

Main Methods:

  • Theoretical analysis and modeling of the push-pull structure.
  • Finite element analysis (FEA) using ANSYS Workbench for static stress and modal analysis.
  • Fabrication of a sensor prototype and construction of a sensing system.
  • Performance testing using a vibration testing system.

Main Results:

  • The developed sensor exhibits a natural frequency of 72 Hz.
  • Achieved sensitivity of 51.58 dB (re: 0 dB = 1 rad/g) with 99.68% linearity.
  • Demonstrated exceptional lateral anti-interference reaching 221,227.74 dB (re: 0 dB = 1 rad/g).
  • Lateral interference resistance improved by ~10.8% compared to similar existing sensors.

Conclusions:

  • The proposed Michelson interference type optical fiber acceleration sensor effectively overcomes the limitations of existing designs.
  • The push-pull structure significantly enhances both sensitivity and lateral anti-interference capabilities.
  • This research provides a valuable reference for future development of advanced optical fiber acceleration sensors.