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相关概念视频

Non-inertial Frames of Reference01:27

Non-inertial Frames of Reference

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A reference frame accelerating or decelerating relative to an inertial frame is a non-inertial frame. To help understand this, consider what taking off in an airplane, turning a corner in a car, riding a merry-go-round, and the circular motion of a tropical cyclone all have in common. All these systems are accelerating, decelerating, or rotating relative to the Earth; hence, they all are non-inertial frames. All these systems exhibit inertial forces, which merely seem to arise from motion,...
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Relative Motion Analysis using Rotating Axes01:25

Relative Motion Analysis using Rotating Axes

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Consider a component AB undergoing a linear motion. Along with a linear motion, point B also rotates around point A. To comprehend this complex movement, position vectors for both points A and B are established using a stationary reference frame.
However, to express the relative position of point B relative to point A, an additional frame of reference, denoted as x'y', is necessary. This additional frame not only translates but also rotates relative to the fixed frame, making it...
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Inertial Frames of Reference01:03

Inertial Frames of Reference

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Newton’s first law is usually considered to be a statement about reference frames. It provides a method for identifying a special type of reference frame: the inertial reference frame. In principle, we can make the net force on a body zero. If its velocity relative to a given frame is constant, then that frame is said to be inertial. So, by definition, an inertial reference frame is a reference frame where Newton's first law holds valid. Newton's first law applies to objects with...
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Relative Motion Analysis - Acceleration01:10

Relative Motion Analysis - Acceleration

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A slider-crank mechanism converts rotational motion from the crank into linear motion of the slider or vice versa. This mechanism consists of three main parts: the crank, the connecting rod, and the slider. The movement of the slider-crank is an example of general plane motion as the fluctuating angle between the crank and the connecting rod. Consider a segment AB where point A is at the end of the slider and point B is on the diametrically opposite end to point A, on a crack. The variance in...
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Relative Motion Analysis using Rotating Axes - Acceleration01:22

Relative Motion Analysis using Rotating Axes - Acceleration

322
Consider a component AB undergoing a linear motion. Along with a linear motion, point B also rotates around point A. To comprehend this complex movement, position vectors for both points A and B are established using a stationary reference frame. The absolute velocity of point B is determined by adding the absolute velocity of point A, the relative velocity of point B in the rotating frame, and the effects caused by the angular velocity within the rotating frame.
Time differentiation is...
322
Relative Motion Analysis using Rotating Axes-Problem Solving01:29

Relative Motion Analysis using Rotating Axes-Problem Solving

389
Consider a crane whose telescopic boom rotates with an angular velocity of 0.04 rad/s and angular acceleration of 0.02 rad/s2. Along with the rotation, the boom also extends linearly with a uniform speed of 5 m/s. The extension of the boom is measured at point D, which is measured with respect to the fixed point C on the other end of the boom. For the given instant, the distance between points C and D is 60 meters.
Here, in order to determine the magnitude of velocity and acceleration for point...
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相关实验视频

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High-resolution, High-speed, Three-dimensional Video Imaging with Digital Fringe Projection Techniques
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High-resolution, High-speed, Three-dimensional Video Imaging with Digital Fringe Projection Techniques

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在多摄像头系统中使用时间校准视频的子级同步.

Xiaoshi Zhou1, Yanran Dai2, Haidong Qin1

  • 1National Engineering Laboratory for Integrated Aero-Space-Ground-Ocean Big Data Application Technology, SAIIP, The School of Computer Science, Northwestern Polytechnical University, Xi'an 710129, China.

Sensors (Basel, Switzerland)
|November 9, 2024
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概括

本研究介绍了多摄像头系统的新子同步方法,消除了对硬件触发器的需求. 该技术使用时间校准的视频和插值算法实现了精确的时间对齐.

关键词:
多摄像头系统多摄像头系统非硬件触发的非硬件触发.的子框架同步.时间校准时间校准.视频同步 视频同步

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科学领域:

  • 计算机视觉 计算机视觉
  • 信号处理 信号处理
  • 机器人技术 机器人技术 机器人技术

背景情况:

  • 精确的同步对于各种应用中的多摄像头系统至关重要.
  • 传统的硬件触发同步是劳动密集型,昂贵,并限制了设置灵活性.

研究的目的:

  • 为多摄像头系统开发一种新的子同步技术.
  • 消除对额外硬件触发器的依赖,以实现同步.

主要方法:

  • 利用时间校准的视频与标记器和一个均移动的球.
  • 提取了当地和全球时间系统之间的时间关系.
  • 计算了新的时间并执行了级对齐.
  • 采用了插值算法来实现子框架级同步.

主要成果:

  • 实现了强大的和非常精确的时间同步.
  • 对于要求苛刻的多摄像头设置来说,已经证明了适应能力.
  • 验证了无硬件方法的有效性.

结论:

  • 拟议的子框架同步方法为传统技术提供了具有成本效益和灵活性的替代方案.
  • 这种方法可以在没有外部硬件的情况下实现精确的时间对齐,从而增强了多摄像头系统的部署.