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Related Experiment Videos

Self-compensating fiber optic flow sensor system and its field applications.

Wei Peng1, Gary R Pickrell, Zhengyu Huang

  • 1Center for Photonics Technology, Bradley Department of Electrical and Computer Engineering, Virginia Polytechnic Institute & State University, Suite 303, 460 Turner Street, Blacksburg, Virginia 24061-0287, USA. weipeng@vt.edu

Applied Optics
|March 30, 2004
PubMed
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A novel fiber optic flow sensor system automatically compensates for temperature and pressure. This self-compensating system offers high resolution, repeatability, and stability for fluid flow rate detection.

Area of Science:

  • Optoelectronics
  • Sensor Technology
  • Fluid Dynamics

Background:

  • Traditional flow sensors often suffer from cross-sensitivity to environmental factors like temperature and pressure.
  • Accurate real-time fluid flow monitoring is crucial in various industrial and scientific applications.
  • Fiber optic sensing offers advantages such as immunity to electromagnetic interference and remote sensing capabilities.

Purpose of the Study:

  • To develop and demonstrate a self-compensating fiber optic flow sensor system.
  • To measure fluid flow rates by utilizing cantilever beam bending and white-light interferometry.
  • To automatically compensate for temperature and pressure cross-sensitivity in the flow sensor.

Main Methods:

  • The system employs broadband white-light interferometry.

Related Experiment Videos

  • Two fiber ferrule sensors are bonded to a cantilever beam to detect air-gap changes.
  • Cantilever beam bending, induced by fluid flow, is correlated to flow rate.
  • The sensor design inherently compensates for temperature and pressure variations.

    • Main Results:

    • A prototype self-compensating fiber optic flow sensor was successfully constructed.
    • Laboratory characterization confirmed the sensor's operational principles.
    • Field testing demonstrated high resolution, excellent repeatability, and robust stability.
    • The system proved effective for on-line detection of fluid flow rates.

    Conclusions:

    • The developed fiber optic flow sensor system effectively measures fluid flow rates.
    • The self-compensating design successfully mitigates temperature and pressure cross-sensitivity.
    • The sensor exhibits promising performance for real-time industrial flow monitoring applications.