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相关概念视频

Hydrostatic Pressure Force on a Plane Surface01:04

Hydrostatic Pressure Force on a Plane Surface

557
When a plane surface is submerged in a fluid, hydrostatic forces develop on the surface due to the fluid's pressure. For horizontal surfaces, the pressure exerted by the fluid is uniform because the depth remains constant. The resultant force is determined by the pressure at the given depth multiplied by the area of the surface, and it acts through the centroid of the surface. For vertical surfaces, the pressure varies with depth, increasing as the distance from the fluid's free surface...
557
Constant Pressure Calorimetry03:02

Constant Pressure Calorimetry

86.4K
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...
86.4K
Measurement of Fluid Pressure01:16

Measurement of Fluid Pressure

311
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...
311
Hydrostatic Pressure Force on a Curved Surface01:04

Hydrostatic Pressure Force on a Curved Surface

2.0K
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...
2.0K

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相关实验视频

Updated: Sep 14, 2025

The Measurement of Unsteady Surface Pressure Using a Remote Microphone Probe
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灵活的热量计差压传感器阵列与超水表面集成,用于飞行参数估计.

Xin Ke1, Yu Gao1, Zheng Gong1

  • 1Institute of Bionic and Micro-nano Systems, School of Mechanical Engineering and Automation, Beihang University, 100191, Beijing, China.

Microsystems & nanoengineering
|July 21, 2025
PubMed
概括

本研究介绍了用于小型无人机的高分辨率差压传感器阵列. 新型传感器实现了精确的飞行参数估计,增强了灵活性和防水能力.

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科学领域:

  • 航空航天工程 航空航天工程
  • 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:

  • 灵活的压力传感器阵列对于在小型无人机 (UAV) 中估计飞行参数至关重要.
  • 现有的传感器由于分辨率低,灵活性差,包装不足而受到影响,这限制了它们在无人机应用中的精度.
  • 需要先进的压力传感解决方案来克服这些局限性,以获得可靠的飞行数据.

研究的目的:

  • 开发一个高分辨率差压传感器阵列,提高灵活性和耐用性.
  • 为了提高小型无人机飞行参数估计的精度.
  • 为了解决当前灵活的压力传感器在分辨率,曲和包装方面的局限性.

主要方法:

  • 采用热量计测量方法和多层聚胺结合物来创建传感器阵列.
  • 传感器阵列设计的检测极限在500Pa范围内为36.5mPa.
  • 集成超水包装以提供防水能力,并使用多层感知神经网络进行数据分析.

主要成果:

  • 开发的传感器阵列在曲的表面上表现出高的重复性.
  • 传感器在500Pa范围内达到36.5mPa的检测极限.
  • 使用神经网络估计飞行参数的平均误差为0.15 m/s的空速和0.37°的攻击角度.

结论:

  • 新的差压传感器阵列为小型无人机的飞行参数估计提供了显著的改进.
  • 传感器的高分辨率,灵活性和防水包装克服了以前的限制.
  • 这项技术可以为无人机导航和控制系统提供更准确和可靠的传感.