Reliability of the step phase detection using inertial measurement units: pilot study

Healthcare Technology Letters

article

Salvatore Sessa¹  Massimiliano Zecca²  Luca Bartolomeo¹  Takamichi Takashima⁵  Hiroshi Fujimoto⁶  Atsuo Takanishi⁷ 

[1] School of Creative Science and Engineering, Waseda University;School of Electronic, Electrical and Systems Engineering, Loughborough University;National Centre for Sports and Exercise Medicine – East Midlands;Lifestyle and Physical Activity Biomedical Research Unit;College of National Rehabilitation Center for Persons with Disabilities;School of Human Sciences, Waseda University;Department of Modern Mechanical Engineering and the Humanoid Robotics Institute, Waseda University

关键词: reliability;    gait analysis;    inertial systems;    sensor placement;    reliability;    step phase detection;    inertial measurement units;    inertial sensors;    gait event detection;    long-distance walking;    human locomotion;    abnormal footfall condition;    slipping surface condition;   

DOI  :  10.1049/htl.2014.0103

学科分类：肠胃与肝脏病学

来源: Wiley

【 摘 要 】

The use of inertial sensors for the gait event detection during a long-distance walking, for example, on different surfaces and with different walking patterns, is important to evaluate the human locomotion. Previous studies demonstrated that gyroscopes on the shank or foot are more reliable than accelerometers and magnetometers for the event detection in case of normal walking. However, these studies did not link the events with the temporal parameters used in the clinical practice; furthermore, they did not clearly verify the optimal position for the sensors depending on walking patterns and surface conditions. The event detection quality of the sensors is compared with video, used as ground truth, according to the parameters proposed by the Gait and Clinical Movement Analysis Society. Additionally, the performance of the sensor on the foot is compared with the one on the shank. The comparison is performed considering both normal walking and deviations to the walking pattern, on different ground surfaces and with or without constraints on movements. The preliminary results show that the proposed methodology allows reliable detection of gait events, even in case of abnormal footfall and in slipping surface conditions, and that the optimal location to place the sensors is the shank.

【 授权许可】

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