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首页> 外文期刊>Journal of Biomechanics >Real-time measurement of pelvis and trunk kinematics during treadmill locomotion using a low-cost depth-sensing camera: A concurrent validity study
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Real-time measurement of pelvis and trunk kinematics during treadmill locomotion using a low-cost depth-sensing camera: A concurrent validity study

机译：使用低成本深度感应摄像头在跑步机运动期间实时测量骨盆和躯干运动学：一项并行有效性研究

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摘要

There is currently no suitable kinematic system for a large-scale prospective trial assessing risk factors of musculoskeletal disorders. A practical kinematic system is described which involves the use of a single low-cost depth-sensing camera for the real-time measurement of 3-dimensional linear and angular pelvic and trunk range-of-movement (ROM). The method is based on the creation and processing of dynamic point clouds taken from the posterior surface of the pelvis and trunk. Nine healthy participants performed 3 trials of treadmill locomotion when walking at self-selected speed (3.6-5.6 km/h), running at 70% (10.9-14.0 km/h) and 90% of maximal speed (14.0-18.0 km/h). Stride-by-stride linear and angular ROM data were captured concurrently using the single depth-sensing camera running at 30 Hz (Kinect (TM) for Windows, Microsoft USA) and a six-camera motion capture system at 100 Hz (Vicon MX13, Vicon Motion Systems, United Kingdom). Within subject correlation coefficients between the practical and criterion method ranged from very large to nearly perfect (r=0.87-1.00) for the linear ROM. Correlation coefficients for the angular ROM ranged from moderate to very large (r=0.41-0.80). The limits of agreement between the two systems for linear movements were <= 9.9 mm at all velocities of gait and <= 4.6 degrees at all velocities of gait. The single camera system using depth-sensing technology is capable of capturing linear pelvic and trunk ROM during treadmill locomotion with reasonable precision when compared to the criterion method. Further improvements to the measurement of angles and validation across a wider population are recommended. (C) 2015 Elsevier Ltd. All rights reserved.
机译：当前，尚无合适的运动系统用于大规模前瞻性试验，以评估肌肉骨骼疾病的危险因素。描述了一种实用的运动学系统，该系统涉及使用单个低成本深度感测相机实时测量3维线性和角度骨盆和躯干运动范围（ROM）。该方法基于从骨盆和躯干后表面获取的动态点云的创建和处理。九名健康参与者以自选速度（3.6-5.6 km / h），以70％（10.9-14.0 km / h）和90％最大速度（14.0-18.0 km / h）跑步时进行了3次跑步机运动试验）。使用运行在30 Hz的单个深度感应摄像头（适用于Windows，Kinect（TM），Microsoft USA）和运行100 Hz的六摄像头运动捕捉系统（Vicon MX13， Vicon Motion Systems，英国）。在主题内，对于线性ROM，实用方法和标准方法之间的相关系数范围从非常大到接近完美（r = 0.87-1.00）。角度ROM的相关系数范围从中等到很大（r = 0.41-0.80）。两个系统之间线性运动的一致极限在所有步态速度下均<= 9.9毫米，在所有步态速度下均<= 4.6度。与标准方法相比，采用深度感应技术的单摄像头系统能够在跑步机运动期间以合理的精度捕获线性骨盆和躯干ROM。建议进一步改进角度的测量范围并在更广泛的人群中进行验证。 （C）2015 Elsevier Ltd.保留所有权利。

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