University of Oviedo, Department of Electrical Engineering, Gijón, Asturias, Spain.
Gait Posture. 2010 Mar;31(3):322-5. doi: 10.1016/j.gaitpost.2009.11.014. Epub 2010 Jan 19.
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.
在本文中，我们报告了一种用于实时检测和定时初始接触（IC）和最终接触（FC）步态事件的新算法。我们处理记录在躯干下部（L3 椎骨）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的实验，将我们的算法的结果与从 Digimax 力台获得的结果进行比较。结果显示，与从平台记录的事件发生时间存在较小偏差（IC 为 13+/-35 毫秒，FC 为 9+/-54 毫秒）。FC 时间的结果在该领域特别相关，因为以前没有通过处理躯干下部加速度来解决其时间位置的工作。IC 的实时检测延迟为 117+/-39 毫秒，FC 的实时检测延迟为 34+/-72 毫秒，提高了以前报告的使用躯干下部加速度实时检测事件的结果。
