果的水压力指数用温度注释的3D点云来衡量
Nikos Tsoulias1, Arash Khosravi1,2, Werner B Herppich1
1Leibniz Institute for Agricultural Engineering and Bioeconomy (ATB), Department Agromechatronic, WG Precision Horticulture, Potsdam, Germany.
Plant phenomics (Washington, D.C.)
|September 19, 2024
概括
使用LiDAR和热成像来监测果树水的状态,开发了一种新的水果压力指数 (FWSI). 这种3D分析比传统的精准农业方法提供了更详细的见解.
科学领域:
- 生态生理学 生态生理学
- 精准农业 精准农业 精准农业
- 遥感 遥感 遥感 遥感
背景情况:
- 果水的状况对于新鲜食品的生产至关重要,尤其是在全球变暖和水资源短缺的情况下.
- 评估作物水压力的现有方法往往缺乏水果特异性的细节.
- 3D分析为植物生态生理学提供了更细致的洞察力.
研究的目的:
- 引入和验证一种新的水果水压力指数 (FWSI),用于详细的水果分析.
- 用3D点云来评估水果表面温度和空气温度之间的关系.
- 为了比较新的FWSI与传统的2D热成像方法的有效性.
主要方法:
- 使用一个带有LiDAR和热摄像头的传感器系统,创建3D点云的果树 (Malus x domestica Borkh. "加拉") 的意思.
- 校准了传感器系统,将温度值分配给3D点云,重建了一个热罩.
- 分段注释的水果点来创建水果点云,并估计水果表面温度 (T_Est).
主要成果:
- 估计的3D水果表面温度 (T_Est) 与手动参考温度 (r2 = 0.93) 有很高的相关性.
- 开发的水果水压力指数 (FWSI_Est) 与手册参考数据相比显示出较低的误差.
- FWSI_Est表现出极端歇斯底里并在整个赛季内增加,提供了有价值的生态生理学数据.
结论:
- 新的FWSI_Est提供了与整个树冠指数相比,果水状况的更详细和时空分析.
- 这种3D生态生理学工具提高了水果水压力监测的效率,并支持有针对性的作物管理.
- 这些发现有助于理解果实对环境条件的反应,在精准农业.
相关概念视频
Definition and Measurement of Pressure: Atmospheric Pressure, Barometer, and Manometer
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.
Fluid Pressure
In mechanical engineering, fluid pressure plays a critical role in designing systems that utilize liquid flow, such as hydraulic systems, pumps, and valves. When designing these systems, engineers must ensure they can withstand the forces created by fluid pressure to avoid damage or failure.
According to Pascal's law, a fluid at rest will generate equal pressure in all directions. This pressure is measured as a force per unit area, and its magnitude depends on the fluid's specific weight or...
According to Pascal's law, a fluid at rest will generate equal pressure in all directions. This pressure is measured as a force per unit area, and its magnitude depends on the fluid's specific weight or...
Variation of Atmospheric Pressure
Change in atmospheric pressure with height is particularly interesting. The decrease in atmospheric pressure with increasing altitude is due to the decreasing gravitational force per unit area as we move away from the surface of the earth.
Assuming the air temperature is constant at a given altitude and that the ideal gas law of thermodynamics describes the atmosphere to a good approximation, one can find the variation of atmospheric pressure with height.
Let p(y) be the atmospheric pressure at...
Assuming the air temperature is constant at a given altitude and that the ideal gas law of thermodynamics describes the atmosphere to a good approximation, one can find the variation of atmospheric pressure with height.
Let p(y) be the atmospheric pressure at...
Pressure Gauges
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...
Measurement of Fluid Pressure
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...
A basic form of manometer is the piezometer, a vertical tube open at the top and filled with the same...
Static, Stagnation, Dynamic and Total Pressure
The concept of static, stagnation, dynamic, and total pressure is fundamental in fluid dynamics, often explained using Bernoulli's equation:


