Unobtrusive human height and posture recognition with a capacitive sensor

Article type: Research Article

Authors: Valtonen, Miika | Kaila, Lasse | Mäentausta, Jaakko | Vanhala, Jukka

Affiliations: Department of Electronics, Tampere University of Technology, P.O. Box 692, 33101 Tampere, Finland

Note: [] Corresponding author. E-mail: [email protected].

Abstract: 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.

Keywords: Height measurement, posture recognition, capacitive sensor, context recognition, user identification

DOI: 10.3233/AIS-2011-0120

Journal: Journal of Ambient Intelligence and Smart Environments, vol. 3, no. 4, pp. 305-332, 2011