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A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings
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A Differential Reflective Intensity Optical Fiber Angular Displacement Sensor.

Binghui Jia1,2, Lei He3, Guodong Yan4

  • 1School of Mechanical Engineering, Nanjing Institute of Technology, Nanjing 211167, China. bhjia@njit.edu.cn.

Sensors (Basel, Switzerland)
|September 21, 2016
PubMed
Summary
This summary is machine-generated.

A novel optical fiber sensor directly measures angular and linear displacement. This intensity modulation sensor features a simple design and achieved a 74.4° linear range in experiments.

Keywords:
angular displacement sensorcalibration testingdifferential

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Area of Science:

  • Optoelectronics
  • Fiber Optic Sensors
  • Instrumentation

Background:

  • Accurate measurement of angular and linear displacement is crucial in various industrial applications.
  • Existing sensors may have limitations in direct measurement, complexity, or cost.
  • Optical fiber sensors offer potential advantages due to their immunity to electromagnetic interference and compact size.

Purpose of the Study:

  • To propose and analyze a novel differential reflective intensity optical fiber sensor.
  • To enable direct measurement of both angular and axial linear displacement of flat surfaces.
  • To develop and validate a sensor with a simple structure and high performance.

Main Methods:

  • Analysis of the sensor's basic principle based on intensity modulation mechanisms.
  • Development of a photoelectric conversion circuit for signal adjustment and zero-trimming.
  • Establishment of a sensor model incorporating the photoelectric circuit for simulation.
  • Simulation of design parameters' influence on sensor output characteristics.
  • Experimental calibration of the sensor using a dedicated test system.

Main Results:

  • The sensor directly measures angular and axial linear displacement of flat surfaces.
  • Simulations guided the optimization of sensor structure design parameters.
  • Experimental results demonstrated a linear angular measurement range of 74.4 degrees.
  • The sensor exhibited a sensitivity of 0.051 V/degree.
  • Observed output characteristics validated the sensor's operating principle.

Conclusions:

  • The proposed differential reflective intensity optical fiber sensor is effective for direct angular and linear displacement measurement.
  • The sensor's simple structure and optimized design contribute to its performance.
  • Experimental validation confirms the sensor's capability and operating principle, showing promise for practical applications.