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Related Experiment Video

Updated: Feb 11, 2026

Implementation of a Reference Interferometer for Nanodetection
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Partial Discharge Ultrasound Detection Using the Sagnac Interferometer System.

Yu Wang1, Xiaomin Li2, Yan Gao3

  • 1Key Laboratory of Advanced Transducers and Intelligent Control Systems (Ministry of Education and Shanxi Province), College of Physics and Optoelectronics, Taiyuan University of Technology, Taiyuan 030024, China. wangyu@tyut.edu.cn.

Sensors (Basel, Switzerland)
|May 9, 2018
PubMed
Summary

A novel optical fiber Sagnac interferometer system offers a solution for detecting partial discharge (PD) ultrasounds, overcoming electromagnetic interference. This new sensor enables safer, intrinsically safe detection of PD in hazardous environments.

Keywords:
optical fiber sensorpartial dischargestime-frequency analysisultrasound detection

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Area of Science:

  • Electrical Engineering
  • Sensing Technology
  • Acoustics

Background:

  • Partial discharge (PD) detection is vital for electrical cable safety.
  • Ultrasonic signals from PD contain crucial diagnostic information.
  • Conventional ultrasonic transducers suffer from electromagnetic interference in high-voltage environments.

Purpose of the Study:

  • To propose and evaluate an optical fiber Sagnac interferometer system for PD ultrasound detection.
  • To overcome the limitations of traditional transducers in electromagnetic interference-prone settings.
  • To enable intrinsically safe PD detection in explosive environments.

Main Methods:

  • Development of an optical fiber Sagnac interferometer system.
  • Utilizing optical fiber sensing for ultrasonic signal acquisition.
  • Employing time-frequency analysis for signal characterization.
  • Testing with a 10 kV partial discharge simulator.

Main Results:

  • The Sagnac interferometer system demonstrated an effective frequency band up to 175 kHz.
  • Characteristic ultrasonic frequencies for PD were identified between 28.9 kHz and 57.6 kHz.
  • Successful optical fiber sensing and time-frequency analysis of PD-induced ultrasound were achieved.

Conclusions:

  • The proposed optical fiber Sagnac interferometer is effective for PD ultrasound detection.
  • This system provides a robust alternative to conventional transducers, mitigating electromagnetic interference.
  • The sensor is suitable for intrinsically safe PD monitoring in hazardous industrial settings.