Estimation of Walking Speed and Its Spatiotemporal Determinants Using a Single Inertial Sensor Worn on the Thigh: From Healthy to Hemiparetic Walking.
Estimation of Walking Speed and Its Spatiotemporal Determinants Using a Single Inertial Sensor Worn on the Thigh: From Healthy to Hemiparetic Walking.
复制标题
使用大腿上戴的单个惯性传感器来估计步行速度及其时空决定因素：从健康到偏瘫。
DOI：
10.3390/s21216976
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发表时间：
2021-10-21
期刊：
影响因子：
--
通讯作者：
Awad LN
中科院分区：
文献类型：
--
作者：
Arumukhom Revi D;De Rossi SMM;Walsh CJ;Awad LN
我们提出了使用一个单一的惯性测量单元（IMU）戴在大腿上，以产生步行速度及其时空决定因素（即，步幅时间和步幅长度）。10名健康人和8名中风后的人完成了6分钟的步行测试，使用18个摄像头的运动捕捉系统进行地面实况测量。训练特定于受试者的估计模型，以使用从IMU测量的大腿角位置和速度产生的相位图中提取的极半径来估计行走速度。大腿角位置数据中的连续屈曲峰值用于定义每个步幅并计算步幅时间。然后使用对步行速度和步幅时间的逐步估计来计算步幅长度。在健康和卒中后队列中，观察到IMU对步行速度（MAE < 0.035 m/s; ICC > 0.98）、步幅时间（MAE < 30 ms; ICC > 0.97）和步幅长度（MAE < 0.037 m; ICC > 0.96）的估计误差低且一致性高。这项研究提出了使用一个单一的可穿戴传感器，以准确地估计步行速度及其时空的决定因素，在健康和偏瘫步行。
We present the use of a single inertial measurement unit (IMU) worn on the thigh to produce stride-by-stride estimates of walking speed and its spatiotemporal determinants (i.e., stride time and stride length). Ten healthy and eight post-stroke individuals completed a 6-min walk test with an 18-camera motion capture system used for ground truth measurements. Subject-specific estimation models were trained to estimate walking speed using the polar radius extracted from phase portraits produced from the IMU-measured thigh angular position and velocity. Consecutive flexion peaks in the thigh angular position data were used to define each stride and compute stride times. Stride-by-stride estimates of walking speed and stride time were then used to compute stride length. In both the healthy and post-stroke cohorts, low error and high consistency were observed for the IMU estimates of walking speed (MAE < 0.035 m/s; ICC > 0.98), stride time (MAE < 30 ms; ICC > 0.97), and stride length (MAE < 0.037 m; ICC > 0.96). This study advances the use of a single wearable sensor to accurately estimate walking speed and its spatiotemporal determinants during both healthy and hemiparetic walking.
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影响因子：
56.9
作者：
Kim, Jinsoo;Lee, Giuk;Walsh, Conor J.
通讯作者：
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影响因子：
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作者：
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影响因子：
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影响因子：
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影响因子：
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