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相关概念视频

Pipe Flowrate Measurement01:28

Pipe Flowrate Measurement

In pipe flow measurement, orifice, nozzle, and Venturi meters are commonly used to determine fluid flowrates by constricting the flow area, which increases fluid velocity and reduces pressure. This pressure difference, governed by Bernoulli's principle and adjusted for real-world conditions, is essential for calculating flowrate. Each meter type is suited to specific applications based on accuracy, efficiency, and compatibility with various flow conditions.
The orifice meter is a simple,...

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相关实验视频

Updated: Jun 27, 2026

Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping
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基于量子点的光纤传感器用于在低初始温度下传感流速.

Lei Sun1, Yekun Cao1, Rui Zhou1

  • 1Department of Physics, School of Physics and Mechanics, Wuhan University of Technology, Wuhan 430070, China.

Sensors (Basel, Switzerland)
|April 12, 2025
PubMed
概括

一个新的纤维传感器探测器检测微流体流速与最小的温度增加. 这项创新为血液微循环和药物输送等应用提供了灵敏的低温监测.

关键词:
法布里 - 佩罗特干扰计在PbS QDs中使用.流速 流速 流速 流速微流量计微流量计光热效应是一种光热效应.

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Last Updated: Jun 27, 2026

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科学领域:

  • 光电学是指光电子产品.
  • 材料科学 材料科学 材料科学
  • 微流体学 微流体学

背景情况:

  • 精确的流速监测对于微流体系统和血液微循环至关重要.
  • 传统的热线流量计需要高的初始温度,限制其使用温度敏感的液体,如血液.

研究的目的:

  • 开发一台光纤传感器探测器,用于微流体学中的敏感流速检测.
  • 为了克服高初始温度在现有的热线流量计的局限性.

主要方法:

  • 使用PbS量子点 (QDs) 合的光电阻,制造具有平面-空腔的纤维传感器探头.
  • 使用980nm激发激光用于热能转换和C波段干扰的检测.
  • 为光纤传感器探测器实施强度查询方案.

主要成果:

  • 仅在温度升高3°C的情况下,实现了灵敏的流速监测.
  • 显示的灵敏度为7.7 pm / mm / s,在线性响应范围为3.82 mm / s至16.72 mm / s.
  • 拟议的传感器适用于微流体,因为其初始温度要求较低.

结论:

  • 开发的光纤传感器探测器为微流体流速测量提供了灵敏和低温的解决方案.
  • 这项技术显示出在微循环监测和药物输送系统中应用的巨大潜力.