Estimation of Stride Length, Foot Clearance, and Foot Progression Angle Using UWB Sensors

Stride length (SL), foot clearance (FC), and progression angle (FPA) are the key parameters for diagnosing gait disorders. This study used distance data between two feet measured by ultra-wideband (UWB) sensors installed on shoes proposed a method estimating three parameters. Here, of compensating offset UWB sensor distances base one during stance phase other swing was applied. Foot trajectory acquired in experiment with ten healthy adults walking treadmill. The results were compared those obtained using motion capture system (MCS). UWBs displayed average errors 45.84 mm, 7.60 2.82° SL, FC, FPA, respectively, MCS. A similar accuracy level achieved previous that an inertial measurement unit (IMU). Thus, these suggest can be extensively applied to systems analyze mobile systems.