Electric Field Sensing For Graphical Interfaces
IEEE Computer Graphics and Applications
TileTrack: Capacitive human tracking using floor tiles
PERCOM '09 Proceedings of the 2009 IEEE International Conference on Pervasive Computing and Communications
Human tracking using electric fields
PERCOM '09 Proceedings of the 2009 IEEE International Conference on Pervasive Computing and Communications
Unobtrusive human height and posture recognition with a capacitive sensor
Journal of Ambient Intelligence and Smart Environments
Capacitive indoor positioning and contact sensing for activity recognition in smart homes
Journal of Ambient Intelligence and Smart Environments
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In this paper, we describe a 3D mobile demonstration platform that can passively track the location and posture of multiple persons walking on a segmented floor. The presented tracking system is fully unobtrusive and requires the user to neither wear any tags or perform any special action, such as talk, to be tracked. Thus, it promotes the concept of calm technology by pushing the sensing actions to the background. The system is based on capacitive measurements in transmit-mode which are performed using a commercial capacitance-to-digital converter. The user position on the floor level is calculated by measuring the placement of feet on different transmitting floor segments. The vertical head position is measured using a large receiver electrode placed above the tracking area and the result is used to determine the user posture. The implemented system is provided for hands-on evaluation for conference attendees with a 1.8x3.0 m floor space which enables the tracking of five persons at the same time. The position and the three-state posture of the persons walking on the floor are displayed to the demo attendees in real-time.