A Robotic Platform for Lower Limb Optical Motion Tracking in Open Space

Conventional human motion tracking techniques based on optical systems reports important limitations for mobile applications (e.g. small spatial covering, poor environment flexibility). The present paper addresses a novel approach for optical motion tracking in open space. The measurement unit is transferred from its stationary basis onto a robotic moving platform. The platform design and limitations are described in the first place. It follows a comparative analysis of the measurement data accuracy for the stationary and mobile system. Post-processing techniques to convert acquired motion from the platform coordinate system into the ground's absolute one are evaluated for the specific application of gait analysis.