Applying electric field sensing to human-computer interfaces
CHI '95 Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
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Electric field imaging
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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
Human body tracking with electric field ranging
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IEEE Transactions on Systems, Man, and Cybernetics, Part C: Applications and Reviews
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In pervasive context recognition and user identification applications, unobtrusive recognition of user height and posture is difficult. With the current state of technology, this becomes even harder in environments where cameras are not desired or allowed. This paper answers this problem by presenting a simple, unobtrusive, and low-cost system for measuring height and posture of the user. The measurement method is based on capacitive coupling of low-frequency signals and conductivity of the human body. The designed system was simulated, implemented, and tested with 14 adults. The experimental results show that in 90% of the test cases the height of a person can be measured with 5.2 cm and 14.3 accuracy in standing and all other postures, respectively.