Journal of the Korean Society of Manufacturing Technology Engineers (한국생산제조학회지)

The Korean Society of Manufacturing Technology Engineers (한국생산제조학회)
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Implementation of an Interrogator for the Operationand Measurement of Fiber Bragg Grating Multiplexing Sensor Probes

FBG 다중화 센서 탐촉자 구동 및 측정을 위한 인터로게이터 설계 제작

  • Kim, Ji-Dea (Lab. of Machining and Measurement, Chungnam National University) ;
  • Lee, Dong-Ju (Dept. of Mechanical Engineering, Chungnam National University)
  • Received : 2014.03.13
  • Accepted : 2014.04.08
  • Published : 2014.04.15
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Abstract

This research focuses on the development of an interrogator that operates and measures fiber Bragg grating(FBG) multiplexing sensor probes for accurate-measurement of the blade deflection in a wind power generator. We designed and fabricated an optical source and spectrum module for the interrogator. Additionally, we verified the wavelength repeatability within 0.001 nm and the wavelength stability within 1 pm of the optical source, and we experimentally determined that the wavelength scanning range was about 44.4 nm. The FBG sensor with 2 nm resolution can be extended to a performance-efficient system that measures more than 20 sensors. The implemented interrogator has 0.141 nm wavelength variations corresponding to an ambient temperature range of $0^{\circ}C$ to $70^{\circ}C$. The measurement error can be easily reduced by employing a temperature compensation algorithm. In this study, we quantitatively confirmed the accuracy and operating stability of the interrogator.

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References

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