Validation of an ear-worn sensor for gait monitoring using a force-plate instrumented treadmill.
Validation of an ear-worn sensor for gait monitoring using a force-plate instrumented treadmill.
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DOI：
10.1016/j.gaitpost.2011.11.021
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发表时间：
2012-04
期刊：
影响因子：
2.4
通讯作者：
Yang, Guang-Zhong
中科院分区：
文献类型：
--
作者：
Atallah, Louis;Wiik, Anatole;Jones, Gareth G.;Lo, Benny;Cobb, Justin P.;Amis, Andrew;Yang, Guang-Zhong
使用测力板仪器化跑步机（HP Cosmos Gaitway）来验证用于步态监测的轻量耳戴式传感器（7.4 g）的使用。34名健康受试者被要求在跑步机上以最大步行速度前进（从5 km/h开始，以0.5 km为增量）。该传感器内置一个3D加速度计，可测量内外侧（ML）、垂直（VT）和前后（AP）加速度。最大信号范围和过零点是从每个轴的加速度计信号导出的，已经针对头部运动和信号噪声进行了校正。由仪器跑步机测量的最大力与VT和AP加速度的组合（R平方= 0.36，p = 0）以及VT、ML和AP加速度的组合（R平方= 0.36，p = 0）相关性最好。重量接受峰值力和冲量值也与VT和AP加速度（重量接受：R平方= 0.35，p = 0，冲量：0.26，p = 0）以及VT、ML和AP加速度组合（重量接受：R平方= 0.35，p = 0，冲量：0.26，p = 0）相关性良好。ML轴上的过零特征提供了步态周期的准确预测，平均差为0.03 s（-0.01，0.05置信区间）。
A force-plate instrumented treadmill (Hp Cosmos Gaitway) was used to validate the use of a miniaturised lightweight ear-worn sensor (7.4 g) for gait monitoring. Thirty-four healthy subjects were asked to progress up to their maximum walking speed on the treadmill (starting at 5 km/h, with 0.5 km increments). The sensor houses a 3D accelerometer which measures medio-lateral (ML), vertical (VT) and anterior–posterior (AP) acceleration. Maximum signal ranges and zero crossings were derived from accelerometer signals per axis, having corrected for head motion and signal noise. The maximal force, measured by the instrumented treadmill correlated best with a combination of VT and AP acceleration (R-squared = 0.36, p = 0), and combined VT, ML, and AP acceleration (R-squared = 0.36, p = 0). Weight-acceptance peak force and impulse values also correlated well with VT and AP acceleration (Weight acceptance: R-squared = 0.35, p = 0, Impulse: 0.26, p = 0), and combined VT, ML, and AP acceleration (Weight acceptance: R-squared = 0.35, p = 0, Impulse: 0.26, p = 0). Zero crossing features on the ML axis provided an accurate prediction of the gait-cycle, with a mean difference of 0.03 s (−0.01, 0.05 confidence intervals).
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影响因子：
1.8
作者：
SMEATHERS, JE
通讯作者：
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影响因子：
3
作者：
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影响因子：
2.4
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通讯作者：
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作者：
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