可穿戴式加速度计设备步长估计器的比较。

Comparison of step length estimators from weareable accelerometer devices.

作者信息

Alvarez Diego, Gonzalez Rafael C, Lopez Antonio, Alvarez Juan C

机构信息

Electr. Eng. Dept., Oviedo Univ., Gijon., Spain.

出版信息

Conf Proc IEEE Eng Med Biol Soc. 2006;2006:5964-7. doi: 10.1109/IEMBS.2006.259593.

DOI:10.1109/IEMBS.2006.259593

PMID:17946351

Abstract

Wearable accelerometry provides easily portable systems that supply real-time data adequate for gait analysis. When they do not provide direct measurement of a spatio-temporal parameter of interest, such as step length, it has to be estimated with a mathematical model from indirect sensor measurements. In this work we are concerned with the accelerometry-based estimation of the step length in straight line human walking. We compare five step length estimators. Measurements were taken from a group of four adult men, adding up a total of 800 m per individual of walking data. Also modifications to these estimators are proposed, based on biomechanical considerations. Results show that this modifications lead to improvements of interest over previous methods.

摘要

可穿戴式加速度计提供了易于携带的系统，能够提供适用于步态分析的实时数据。当它们无法直接测量感兴趣的时空参数（如步长）时，就必须通过数学模型根据间接传感器测量值来估计。在这项工作中，我们关注基于加速度计的直线行走人体步长估计。我们比较了五种步长估计器。测量数据来自一组四名成年男性，每人总计有800米的行走数据。此外，基于生物力学考虑，还对这些估计器提出了改进。结果表明，这些改进相较于先前的方法有显著提升。