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相关概念视频

Measurement of Fluid Pressure01:16

Measurement of Fluid Pressure

195
Fluid pressure is commonly measured using devices called manometers, which rely on liquid columns to indicate pressure differences. The height of a liquid column in a manometer reflects the pressure exerted by the fluid, providing a simple yet effective means of measurement. Different types of manometers serve specific purposes based on their configurations and the type of fluids involved.
A basic form of manometer is the piezometer, a vertical tube open at the top and filled with the same...
195
Definition and Measurement of Pressure: Atmospheric Pressure, Barometer, and Manometer02:57

Definition and Measurement of Pressure: Atmospheric Pressure, Barometer, and Manometer

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Gas pressure is caused by force exerted by gas molecules colliding with the surfaces of objects. Although the force of each collision is very small, any surface of an appreciable area experiences a large number of collisions in a short time, which can result in high pressure.
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Pressure Gauges01:20

Pressure Gauges

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Most pressure gauges, like those on scuba tanks, are calibrated to read zero at atmospheric pressure. Readings from such gauges are called the gauge pressure, which is the pressure relative to atmospheric pressure. When the pressure inside the tank exceeds atmospheric pressure, the gauge reports a positive value. Some gauges are designed to measure negative pressure. For example, many physics experiments must take place in a vacuum chamber, a rigid chamber from which some of the air is pumped...
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相关实验视频

Updated: Jun 27, 2025

Characterization of Full Set Material Constants and Their Temperature Dependence for Piezoelectric Materials Using Resonant Ultrasound Spectroscopy
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一个基于全石共振压力传感器的自我温度补偿气温计.

Dongxiang Han1,2, Shenfang Yuan1, Congwei Feng3

  • 1Research Center of Structural Health Monitoring and Prognosis, State Key Laboratory of Mechanics and Control for Aerospace Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China.

Sensors (Basel, Switzerland)
|April 27, 2024
PubMed
概括

这项研究介绍了一种使用新型石英共振传感器的自我温度补偿气温计. 它可以实现高精度 (0.019%FS). 在广泛的温度和压力范围内,通过无人机飞行测试进行验证.

关键词:
在MEMS MEMS中使用.气压计气压计气压计有限元素方法 (FEM)高精度的高精度的高精度.石英晶体共振器的共振器温度补偿是一种温度补偿.

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Fabrication and Testing of Photonic Thermometers
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Exploring the Effects of Atmospheric Forcings on Evaporation: Experimental Integration of the Atmospheric Boundary Layer and Shallow Subsurface
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相关实验视频

Last Updated: Jun 27, 2025

Characterization of Full Set Material Constants and Their Temperature Dependence for Piezoelectric Materials Using Resonant Ultrasound Spectroscopy
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科学领域:

  • 物理 物理学 物理
  • 材料科学 材料科学 材料科学
  • 传感器技术 传感器技术

背景情况:

  • 石英共振压力传感器具有高灵敏度,但容易受到温度变化的影响.
  • 准确的气压读数对于各种应用,包括气象学和导航至关重要.

研究的目的:

  • 开发一种自我温度补偿气压计.
  • 为了提高在不同温度下石英共振压力传感器的准确性和稳定性.

主要方法:

  • 设计和制造了一种具有双端调叉 (DETF) 响应器用于压力传感和单端调叉 (SETF) 响应器用于温度补偿的新型传感器芯片.
  • 实现了温度补偿的多项式拟合方法.
  • 在200-1200hPa的压力范围和-20°C至+60°C的温度范围内进行实验测试.

主要成果:

  • 实现了0.019%的FS精度. 在测试范围之内.
  • 已证明的绝对误差在 ±23 Pa. 的范围内.
  • 通过无人机飞行测试验证了性能,显示与实际飞行轨迹一致.

结论:

  • 新型石英共振压力传感器有效补偿温度漂移.
  • 开发的气压表表现出高精度和稳定性,用于实际应用.
  • 无人机飞行测试证实了传感器的实际性能和可靠性.