基于红外光点捕获系统实现抓举技术的快速反馈

Quick Feedback of Snatch Technique Based on Infrared Motion Capture System

目的:以举重抓举动作技术的快速反馈为实现目标,探索解决由于技术指标结果反馈周期过长而造成运动技术分析在科研服务中的实际效果欠佳的问题。方法:利用VICON红外光点捕获系统,同步采集抓举动作的三维运动学及地面反作用力数据并导入至自编的分析软件进行实时运动模式识别与数据修补,快速再现抓举动作的三维棍图与一系列相关的技术指标。结果:通过对两名优秀举重运动员共计20次抓举动作的反馈测试表明,所建立的抓举运动模式识别方法准确有效、反馈用时短,能满足技术训练的实践需求。结论:在红外光点捕获系统的硬件基础上开发相应的自动识别与反馈系统是一种值得尝试的运动技术分析方法,有较好的应用前景。

Objective：The aim of this study is to develop a quick feedback system for snatch technique based on infrared motion capture system.Methods：the real-time 3D kinematics data of markers and GRF signals were collected synchronously with VICON system and imported to motion pattern identify procedure.After all markers were identified and all data gaps were filled with cube spine interpolation,the 3D stick figure and a series of technique parameters during snatching is presented by quick feedback system directly.Results：the feedback test on 20 trials of two elite weightlifters shows the quick feedback system developed in this study can identify the snatch action accurately just in few seconds and meet the need of training practice quite well.Conclusions：Developing a quick feedback system based on infrared motion capture system is a practicable and worth promoting solution for motion analysis.