基于人体关节点的三维重心计算与验证方法研究
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1.上海健康医学院 医疗器械学院;2.上海理工大学 健康科学与工程学院

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Research on Calculation and Verification Method of 3D Center of Gravity Based on Human Joint Points
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    摘要:

    目的 探究基于机器视觉确定人体重心空间位置的乘系数法和力矩合成法准确度。 方法 搭建力学测量平台,分别设计静态和动态下人体三维重心测量方法,计算重心空间坐标。通过实验,研究分析乘系数法和力矩合成法的计算准确度。 结果 在静态实验下,力矩合成法的计算结果在每个维度上都比乘系数法的准确度更高;在动态实验下,力矩合成法不论是在X或Y方向的平均误差和相对误差都比乘系数法要小,采用动作分解法来分析Z轴重心高度方向,力矩合成法最终呈现的效果更好。 结论 力矩合成法的三维重心计算准确度较高,与力学测量平台的测量数据更接近。力矩合成法所计算出的三维重心基本可代替力学测量平台应用于后续进一步的研究。

    Abstract:

    Objective: Explore the accuracy of the multiplication coefficient method and the moment synthesis method for determining the spatial position of the center of gravity of the human body based on machine vision. Method: Build a mechanical measurement platform, design the three-dimensional center of gravity measurement methods of the human body under static and dynamic conditions, and calculate the space coordinates of the center of gravity. Through experiments, the calculation accuracy of multiplication coefficient method and moment synthesis method is studied and analyzed. Results: In the static experiment, the calculation results of the torque synthesis method are more accurate than the multiplication coefficient method in each dimension; in the dynamic experiment, the average error and relative error of the torque synthesis method in the X or Y direction are higher than that of the multiplication coefficient method. The multiplication coefficient method should be small, and the action decomposition method is used to analyze the height direction of the center of gravity of the Z axis. The final rendering effect of the torque synthesis method is better. Conclusion: The calculation accuracy of the three-dimensional center of gravity by the moment synthesis method is higher, which is closer to the measurement data of the mechanical measurement platform. The three-dimensional center of gravity calculated by the moment synthesis method can basically replace the mechanical measurement platform and be used in subsequent further research.

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  • 收稿日期:2023-02-06
  • 最后修改日期:2023-03-23
  • 录用日期:2023-03-24
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