کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4055991 1603850 2016 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Estimation of foot trajectory during human walking by a wearable inertial measurement unit mounted to the foot
موضوعات مرتبط
علوم پزشکی و سلامت پزشکی و دندانپزشکی ارتوپدی، پزشکی ورزشی و توانبخشی
پیش نمایش صفحه اول مقاله
Estimation of foot trajectory during human walking by a wearable inertial measurement unit mounted to the foot
چکیده انگلیسی


• Foot trajectory during walking was estimated using an IMU sensor attached to the foot.
• Zero velocity and displacement corrections were applied to calculate the trajectory.
• Foot clearance was estimated more accurately than with previously published methods.
• This system serves as a useful tool to monitor human walking during daily activities.

To establish a supportive technology for reducing the risk of falling in older people, it is essential to clarify gait characteristics in elderly individuals that are possibly linked to the risk of falling during actual daily activities. In this study, we developed a system to monitor human gait in an outdoor environment using an inertial measurement unit consisting of a tri-axial accelerometer and tri-axial gyroscope. Step-by-step foot trajectories were estimated from the sensor unit attached to the dorsum of the foot. Specifically, stride length and foot clearance were calculated by integrating the gravity-compensated translational acceleration over time during the swing phase. Zero vertical velocity and displacement corrections were applied to obtain the final trajectory, assuming the slope of the walking surface is negligible. Short, normal, and long stride-length walking of 10 healthy participants was simultaneously measured using the proposed system and a conventional motion capture system to evaluate the accuracy of the estimated foot trajectory. Mean accuracy and precision were approximately 20 ± 50 mm, for stride length, and 2 ± 7 mm for foot clearance, indicating that the swing phase trajectory of the sensor unit attached to the foot was reconstructed more accurately and precisely using the proposed system than with previously published methods owing to the flat floor assumption. Although some methodological limitations certainly apply, this system will serve as a useful tool to monitor human walking during daily activities.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Gait & Posture - Volume 45, March 2016, Pages 110–114
نویسندگان
, ,