Real-time gait event detection for normal subjects from lower trunk accelerations
Real-time gait event detection for normal subjects from lower trunk accelerations
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DOI：
10.1016/j.gaitpost.2009.11.014
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发表时间：
2010-03-01
期刊：
影响因子：
2.4
通讯作者：
Alvarez, Juan C.
中科院分区：
文献类型：
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作者：
Gonzalez, Rafael C.;Lopez, Antonio M.;Alvarez, Juan C.
在本文中，我们报告了一种用于实时检测和计时初始（IC）和最终接触（FC）步态事件的新算法。我们处理在下躯干（L3 椎骨）记录的垂直和前后加速度。该算法基于从 1719 个步骤中提取的一组启发式规则。我们进行了一项独立实验，将我们的算法结果与 Digimax 力平台获得的结果进行比较。结果显示与平台记录的事件发生时间存在微小偏差（IC 为 13 +/- 35 毫秒，FC 为 9 +/- 54 毫秒）。 FC 计时的结果在该领域尤其重要，因为之前的工作还没有通过处理下躯干加速度来解决其时间位置。 IC 实时检测的延迟为 117 +/- 39 ms，FC 的延迟为 34 +/- 72 ms，改善了先前报告的较低躯干加速度事件实时检测结果。 (C) 2009 Elsevier B.V. 保留所有权利。
In this paper we report on a novel algorithm for the real-time detection and timing of initial (IC) and final contact (FC) gait events. We process the vertical and antero-posterior accelerations registered at the lower trunk (L3 vertebra). The algorithm is based on a set of heuristic rules extracted from a set of 1719 steps. An independent experiment was conducted to compare the results of our algorithms with those obtained from a Digimax force platform. The results show small deviations from times of occurrence of events recorded from the platform (13 +/- 35 ms for IC and 9 +/- 54 ms for FC). Results for the FC timing are especially relevant in this field, as no previous work has addressed its temporal location through the processing of lower trunk accelerations. The delay in the real-time detection of the IC is 117 +/- 39 ms and 34 +/- 72 ms for the FC, improving previously reported results for real-time detection of events from lower trunk accelerations. (C) 2009 Elsevier B.V. All rights reserved.