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A Method for Quantifying Upper Limb Performance in Daily Life Using Accelerometers
07:24

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Published on: April 21, 2017

In-fiber integrated accelerometer.

Feng Peng1, Jun Yang, Xingliang Li

  • 1Photonics Research Center, School of Science, Harbin Engineering University, Harbin 150001, China. yangjun141@263.net

Optics Letters
|June 3, 2011
PubMed
Summary
This summary is machine-generated.

This study introduces a compact fiber-optic accelerometer using a Michelson interferometer. The device measures acceleration by detecting optical phase shifts caused by bending in a twin-core fiber, achieving 0.09 rad/g sensitivity.

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Area of Science:

  • Photonics
  • Fiber Optics
  • Sensor Technology

Background:

  • Fiber-optic sensors offer advantages in harsh environments.
  • Michelson interferometers are sensitive to physical perturbations.
  • Developing compact accelerometers is crucial for various applications.

Purpose of the Study:

  • To propose and investigate a compact in-fiber integrated fiber-optic Michelson interferometer accelerometer.
  • To establish a model for calculating sensitivity and resonant frequency.
  • To experimentally validate the performance of the proposed accelerometer.

Main Methods:

  • An in-fiber Michelson interferometer was designed using a twin-core fiber as a sensing element.
  • The twin-core fiber was configured as a simple supported beam, sensitive to bending.
  • Optical phase shifts were demodulated to correlate with applied acceleration.
  • A theoretical model was developed to predict sensor performance.
  • Experimental measurements were conducted to determine sensitivity and resonant frequency.

Main Results:

  • Acceleration was found to be proportional to the force applied to the twin-core fiber.
  • The accelerometer demonstrated a sensitivity of 0.09 rad/g.
  • The resonant frequency of the device was measured to be 680 Hz.

Conclusions:

  • A compact, in-fiber Michelson interferometer-based accelerometer was successfully developed.
  • The device effectively measures acceleration through optical phase demodulation.
  • The experimental results validate the theoretical model and demonstrate the sensor's potential.