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Design of a miniature optical-based velocity probe.

机译：基于光学的微型速度探头的设计。

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摘要

Anemometry is the measurement of wind force and velocity. Though anemometry technology is fairly well developed, many velocity measurement devices are expensive, large, and/or fragile. Due to these limitations, deploying large numbers of anemometers is difficult, and often unrealistic. The miniature optical-based velocity probe is a new instrument that offers advantages over current state-of-the-art anemometers in terms of lower expense, lower power consumption and lighter weight. The probe consists of a high performance plastic optical fiber, a vertical-cavity surface-emitting laser (VCSEL), and a position sensitive detector (PSD). Light transmitted by the VCSEL shines through the free end of the optical fiber illuminating the surface of the PSD. A drag force, induced by an approach flow, causes the optical fiber to deflect. The PSD measures the deflection of the optical fiber and outputs an analog voltage, which can be directly related to velocity through a calibration curve. Equations for the deflection and natural frequency of the optical fiber, along with numerical simulations in FLUENT were used to make key design decisions in order to optimize the probe to meet the target specifications for atmospheric research. Preliminary calibration experiments show that the velocity probe has the potential to be a viable replacement for other research-quality anemometers.
机译：风速测量是对风力和速度的测量。尽管风速仪技术已经相当发达，但是许多速度测量设备却昂贵，庞大和/或易碎。由于这些限制，部署大量的风速仪很困难，而且通常是不现实的。基于光学的微型速度探头是一种新型仪器，在费用更低，功耗更低和重量更轻方面，比当前的最新风速仪具有更多优势。该探头由高性能塑料光纤，垂直腔表面发射激光器（VCSEL）和位置敏感检测器（PSD）组成。 VCSEL传输的光穿过光纤的自由端，照亮PSD的表面。由进场流引起的阻力使光纤偏转。 PSD测量光纤的偏转并输出模拟电压，该电压可以通过校准曲线直接与速度相关。光纤的挠度和固有频率方程，以及FLUENT中的数值模拟被用于做出关键的设计决策，以便优化探头以满足大气研究的目标规范。初步的校准实验表明，速度探头有可能替代其他具有研究质量的风速仪。

著录项

  • 作者

    Butterworth, Jacob.;

  • 作者单位

    The University of Utah.;

  • 授予单位 The University of Utah.;
  • 学科 Engineering Mechanical.
  • 学位 M.S.
  • 年度 2011
  • 页码 105 p.
  • 总页数 105
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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