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E-textiles for autonomous location awareness

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3 Author(s)
Chandra, M. ; Dept.t of Electr. & Comput. Eng., Virginia Polytech. Inst. & State Univ., Blacksburg, VA, USA ; Jones, M.T. ; Bradley, T.L.M.

In this paper, we describe an autonomous, wearable electronic textile location awareness system that will determine a user's location within a building given a map of that building. The system uses a moderate number of ultrasonic range transceivers as the sensing elements. Given a set of range readings from these sensors, the system attempts to match those actual readings to expected readings associated with a set of candidate locations for the wearer. These expected readings are calculated using a simulation model of the propagation of ultrasonic signals within a building. An additional algorithm is given for determining the wearer's movement between rooms, allowing for the uncertainty associated with sensor readings in complex, multiroom environments. A wearable prototype system is described and results from this system in a variety of situations are presented.

Published in:

Wearable Computers, 2004. ISWC 2004. Eighth International Symposium on  (Volume:1 )

Date of Conference:

31 Oct.-3 Nov. 2004