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首页> 外文期刊>Journal of Biomechanics >Opportunities for measuring wheelchair kinematics in match settings; reliability of a three inertial sensor configuration
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Opportunities for measuring wheelchair kinematics in match settings; reliability of a three inertial sensor configuration

机译：在比赛环境中测量轮椅运动学的机会;三惯性传感器配置的可靠性

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Knowledge of wheelchair kinematics during a match is prerequisite for performance improvement in wheelchair basketball. Unfortunately, no measurement system providing key kinematic outcomes proved to be reliable in competition. In this study, the reliability of estimated wheelchair kinematics based on a three inertial measurement unit (IMU) configuration was assessed in wheelchair basketball match-like conditions. Twenty participants performed a series of tests reflecting different motion aspects of wheelchair basketball. During the tests wheelchair kinematics were simultaneously measured using IMUs on wheels and frame, and a 24-camera optical motion analysis system serving as gold standard. Results showed only small deviations of the IMU method compared to the gold standard, once a newly developed skid correction algorithm was applied. Calculated Root Mean Square Errors (RMSE) showed good estimates for frame displacement (RMSE <= 0.05 m) and speed (RMSE <= 0.1 m/s), except for three truly vigorous tests. Estimates of frame rotation in the horizontal plane (RMSE < 3 degrees) and rotational speed (RMSE < 7 degrees/s) were very accurate. Differences in calculated Instantaneous Rotation Centres (IRC) were small, but somewhat larger in tests performed at high speed (RMSE up to 0.19 m). Average test outcomes for linear speed (ICCs >0.90), rotational speed (ICC > 0.99) and IRC (ICC > 0.90) showed high correlations between IMU data and gold standard. IMU based estimation of wheelchair kinematics provided reliable results, except for brief moments of wheel skidding in truly vigorous tests. The IMU method is believed to enable prospective research in wheelchair basketball match conditions and contribute to individual support of athletes in everyday sports practice. (C) 2015 Elsevier Ltd. All rights reserved.
机译：比赛期间对轮椅运动学的了解是提高轮椅篮球性能的前提。不幸的是，没有提供关键运动学结果的测量系统在竞争中证明是可靠的。在这项研究中，在类似轮椅篮球比赛的条件下评估了基于三惯性测量单元（IMU）配置的估计轮椅运动学的可靠性。 20名参与者进行了一系列测试，这些测试反映了轮椅篮球运动的不同方面。在测试过程中，同时使用车轮和车架上的IMU以及24相机光学运动分析系统作为黄金标准，同时测量了轮椅运动学。结果表明，一旦应用了新开发的滑移校正算法，IMU方法与黄金标准相比只有很小的偏差。计算出的均方根误差（RMSE）对帧位移（RMSE <= 0.05 m）和速度（RMSE <= 0.1 m / s）进行了很好的估计，除了三个真正有力的测试。估计帧在水平面中的旋转（RMSE <3度）和旋转速度（RMSE <7度/秒）非常准确。计算得到的瞬时旋转中心（IRC）的差异很小，但在高速（RMSE高达0.19 m）下进行的测试中，差异稍大。线性速度（ICC> 0.90），转速（ICC> 0.99）和IRC（ICC> 0.90）的平均测试结果表明IMU数据与金标准之间具有高度相关性。基于IMU的轮椅运动学估计提供了可靠的结果，除了在真正有力的测试中短暂的轮滑瞬间。 IMU方法被认为可以在轮椅篮球比赛条件下进行前瞻性研究，并为运动员在日常体育锻炼中的个人支持做出贡献。 （C）2015 Elsevier Ltd.保留所有权利。

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