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相关概念视频

Measurement of Fluid Pressure01:16

Measurement of Fluid Pressure

575
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...
575
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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Constant Pressure Calorimetry03:02

Constant Pressure Calorimetry

97.1K
Calorimetry is a technique used to measure the amount of heat involved in a chemical or physical process or to measure the heat transferred to or from a substance. The heat is exchanged with a calibrated and insulated device called the calorimeter. Calorimetry experiments are based on the assumption that there is no heat exchange between the insulated calorimeter and the external environment. The well-insulated calorimeters prevent the transfer of heat between the calorimeter and its external...
97.1K
Hydrostatic Pressure Force on a Curved Surface01:04

Hydrostatic Pressure Force on a Curved Surface

2.5K
Hydrostatic pressure on curved surfaces is a fundamental concept in fluid mechanics with broad applications in the civil engineering field. When fluid is in contact with a curved surface, as in a reservoir, dam, or storage tank, it exerts pressure that varies in magnitude and direction along the curved surface. To assess the total hydrostatic force exerted by the fluid on a curved structure, engineers typically isolate the fluid volume adjacent to the surface and analyze the forces acting on...
2.5K

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相关实验视频

Updated: Jan 14, 2026

An Experimental Protocol for Assessing the Performance of New Ultrasound Probes Based on CMUT Technology in Application to Brain Imaging
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双模式CMUT结构传感器用于高水压测量:常规和崩模式.

Zhaodong Li1, Wendong Zhang1, Mehmet Yilmaz2

  • 1State key Laboratory of Extreme Environment Optoelectronic Dynamic Measurement Technology and Instrument, North University of China, Taiyuan, China.

Microsystems & nanoengineering
|October 28, 2025
PubMed
概括

本研究介绍了容量微加工超声波传感器 (CMUT) 用于在高水静态环境中被动压力传感. 新型CMUT压力传感器显示出高一致性,可靠性和长期稳定性,用于准确的测量.

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科学领域:

  • 在MEMS技术方面,
  • 传感器技术 传感器技术
  • 材料科学 是一种材料科学.

背景情况:

  • 容量微加工超声波传感器 (CMUT) 主要用于医疗成像,非破坏性测试和化学传感中的主动传感.
  • CMUT固有的电容性质表明了被动传感应用的潜力.
  • 高水静压环境对传统的压力传感器来说是个独特的挑战.

研究的目的:

  • 研究CMUT结构在高水静压环境中的被动压力传感的应用.
  • 评估基于CMUT的压力传感器在极端压力条件下的一致性,可靠性和长期稳定性.
  • 确定使用CMUT用于超过20MPa的精确压力测量的可行性.

主要方法:

  • 使用微电机系统 (MEMS) 技术制造CMUT压力传感器.
  • 通过静态电容偏差测量来表征传感器的一致性.
  • 在高水静压环境 (高达20MPa) 中对传感器性能进行实验测试.
  • 通过将传感器暴露在动态压力室中三个月来评估长期稳定性和可重复性.

主要成果:

  • 制造的CMUT压力传感器表现出高一致性,最大静态电容偏差仅为1%.
  • 传感器可靠地测量了超过20MPa的压力,并具有实时响应.
  • 经过三个月的动态压力室,传感器显示出出色的重复性,最大偏差为0.65%.

结论:

  • 该CMUT结构适用于在高水静压环境中的被动压力传感.
  • 基于CMUT的压力传感器显示出高可靠性,一致性和卓越的长期稳定性.
  • 这项研究为利用CMUT在苛刻的高水静压传感应用中提供了基础.