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Area of Science:

  • Optoelectronics
  • Mechanical Engineering
  • Civil Engineering

Background:

  • Overhead power lines are critical infrastructure requiring continuous monitoring.
  • Wire elongation and sag are key indicators of structural integrity and operational status.
  • Existing monitoring methods may lack precision or real-time capabilities.

Purpose of the Study:

  • To present a novel sensor system utilizing fiber Bragg gratings for overhead line monitoring.
  • To investigate the effectiveness of different fiber Bragg grating interrogation methods.
  • To establish an optomechanical system for accurate observation of wire sag.

Main Methods:

  • Development and implementation of a sensor system with fiber Bragg gratings.
  • Utilizing an interrogation system with adjusted filters for spectral analysis.
  • Experimental examination of three types of fiber Bragg grating pairs under varying conditions.

Main Results:

  • Demonstrated successful monitoring of overhead line wire elongation using the fiber Bragg grating sensor.
  • Showcased the ability to adjust the optomechanical system for specific sag observation ranges.
  • Identified the dependence of sag range on mechanical and optical parameters, pole distance, wire type, and length.

Conclusions:

  • The proposed fiber Bragg grating sensor system offers a viable solution for overhead line monitoring.
  • Precise adjustment of the optomechanical system allows for tailored sag observation.
  • The system's performance is directly linked to the interplay between sensor characteristics and environmental factors.