相关实验视频
Updated: May 11, 2026

07:51
Video Movement Analysis Using Smartphones ViMAS: A Pilot Study
Published on: March 14, 2017
17.3K
开封可以提供有效和可靠的动力学数据,用于运动分析? 一个系统的审查和三级元分析
Salih Çabuk1, Süleyman Ulupınar1, İzzet İnce2
1Erzurum Technical University, Sport Sciences Faculty, Department of Coaching Education, Erzurum, Türkiye.
Biology of sport
|March 5, 2026
概括
像OpenCap这样的无标记运动捕捉系统为临床和体育分析提供了有效和可靠的动力学数据. 虽然通常是准确的,但性能因任务的复杂性和特定关节运动而有所不同.
科学领域:
- 生物力学 生物力学
- 运动捕捉技术的技术.
- 临床生物力学 临床生物力学
背景情况:
- 无标记运动捕捉系统正在成为传统基于标记的系统的切实可行的替代方案.
- 基于智能手机的系统OpenCap因其可访问性而引起人们的兴趣.
- 对其准确性和可靠性与黄金标准进行评估对于临床和体育应用至关重要.
研究的目的:
- 与黄金标准的运动捕捉系统相比,系统地审查和元分析OpenCap的标准有效性.
- 总结有关OpenCap在各种任务和联合角度的可靠性的证据.
主要方法:
- 在主要的科学数据库 (Web of Science,PubMed,Scopus,EBSCO) 进行系统的文献搜索.
- 12项包含研究的三级元分析 (11项有效性) 涉及184名参与者.
- 提取了效果大小 (ES),费舍尔Z值和根平均平方误差 (RMSE) 来进行有效性和可靠性评估.
主要成果:
- 与标准设备相比,OpenCap显示了统计学上显著但实际上微不足道的差异 (ES = -0.140,p = 0.021).
- 观察到与标准设备的良好至优异相关性 (r = 0.845,p = 0.005),聚合RMSE为5.877° (调整为4.940°).
- 测试-重新测试可靠性一般为中度至非常好,但在复杂或高速运动中显示出变化.
结论:
- OpenCap提供了有效和可接受的动力学测量,与标准设备可比.
- 系统性能受到任务复杂性和联合特定需求的影响.
- 需要对不同人群,任务和标准化的方法进行进一步的研究,以充分了解其能力.
相关概念视频
Kinematic Equations - I
When an object moves with constant acceleration, the velocity of the object changes at a constant rate throughout the motion. The kinematic equations of motions are derived for such cases where the acceleration of the object is constant. The first kinematic equation gives an insight into the relationship between velocity, acceleration, and time. We can see, for example:
Kinematic Equations - II
The second kinematic equation expresses the final position of an object in terms of its initial position, the distance traveled with the initial constant velocity, and the distance traveled due to a change in velocity. Similar to the first kinematic equation, this equation is also only valid when the acceleration is constant throughout the motion of an object.
Suppose a car merges into freeway traffic on a 200 m long ramp. If its initial velocity is 10 m/s and it accelerates at 2 m/s2, then the...
Suppose a car merges into freeway traffic on a 200 m long ramp. If its initial velocity is 10 m/s and it accelerates at 2 m/s2, then the...
Kinematic Equations - III
The first two kinematic equations have time as a variable, but the third kinematic equation is independent of time. This equation expresses final velocity as a function of the acceleration and distance over which it acts. The fourth kinematic equation does not have an acceleration term and provides the final position of the object at time t in terms of the initial and final velocities. This equation is useful when the value of the constant acceleration is unknown.
Using the kinematic equations,...
Using the kinematic equations,...
Kinematic Equations: Problem Solving
When analyzing one-dimensional motion with constant acceleration, the problem-solving strategy involves identifying the known quantities and choosing the appropriate kinematic equations to solve for the unknowns. Either one or two kinematic equations are needed to solve for the unknowns, depending on the known and unknown quantities. Generally, the number of equations required is the same as the number of unknown quantities in the given example. Two-body pursuit problems always require two...
Relative Motion Analysis using Rotating Axes
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 instrumental in...
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 instrumental in...
Relative Motion Analysis using Rotating Axes-Problem Solving
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...
Here, in order to determine the magnitude of velocity and acceleration for point...

