摘要
目的:设计搭建一个镶嵌有三维测力台的斜坡平台,对该平台进行可靠性验证,同时提出对应的空间坐标系建立方案,为未来各行业的需求提供理论数据及参考。方法:采用铝型材配合千斤顶搭建斜坡系统,通过在测力台四角设置反光标志点建立虚拟环节让测力台跟随坡角改变,而后通过自然振动频率、压力中心、反光标志点位移、力值误差来检验该系统的可行性及可靠性。结果:斜坡三方向自然振动频率高于人体步行频率,不同条件下(坡角、动静态)压力中心无显著性差异(P>0.05),反光标志点位移无显著性差异(P>0.05),力值测量(P>0.05)无显著性差异。结论:整套系统在测量斜坡步行时足够精确。采用跟踪测力台的方式并将空间坐标系建立在地面上有助于优化测试流程,便于后期计算。该研究结果应用可满足不同环境下对单块或多块测力台空间位置重新分布的要求。
Objective: To design and construct a slope embedded with a force plate,verify the reliability of the test data,and the corresponding coordinate system establishment plan is proposed to provide theoretical data and reference for the future needs of various industries. Methods: Using aluminum materials with jacks to build slope system,set up markers in the four corners of the force plate to set virtual segment of reflective marks to allow the force plate to follow and then use the natural vibration frequency,pressure center,reflective marker displacement,and force to examine feasibility and practicality of the adjustable slope system. Results: The three-dimensional natural vibration frequency of the slope system is higher than the human body's walking frequency,and no difference is found in pressure centers(P>0.05),no difference is found in marker position(P > 0.05) or force(P >0.05) between different conditions. Conclusion: The entire system is accurate enough when measuring slope walking. Using the method of tracking the force plate and setting the coordinate system on the ground will help optimize the testing process and facilitate later calculations. The application of the results of this study can meet the requirements for redistribution of spatial locations of single or multi-piece force plates in different environments.
引文
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