Gait Analysis Using Foot-Mounted Inertial Sensors and Permanent Magnet

Two inertial measurement units and a permanent magnet are attached on two feet to estimate foot motion for gait analysis. Gait events are detected using a simple peak detection method with accelerometer data. To correct foot position error, the zero-velocity intervals, z-axis position, and magnetic measurement updates are used. The proposed solution gives accurate trajectories and also the relative position of two feet in straight walking experiments, which is simple, low-cost and promising for gait analysis applications.