A 10mW Wearable Positioning System

Author

Muller, Henk ; Randell, Cliff ; Moss, Andrew

Author_Institution

Mobile & Wearable Comput. group, Bristol Univ., Bristol

fYear

2006

fDate

11-14 Oct. 2006

Firstpage

47

Lastpage

50

Abstract

In this paper we present a wearable positioning system that requires less than 10 mW to operate. The system consists of an infrastructure of ultrasonic transmitting devices, and a receiver device on the wearable. The receiver comprises an ultrasonic pick-up, an op-amp, and a PIC. The PIC implements a particle filter for estimating X and Y positions, which is robust in an environment with limited precision. We have modified the traditional particle filter in order to operate on a micro-controller with limited memory capabilities. The number of particles is only limited by the amount of memory on the PIC; we only use 5% of the PIC´s computational power.

Keywords

human computer interaction; wearable computers; microcontroller; particle filter; ultrasonic transmitting devices; wearable positioning system; Chirp; Filtering algorithms; Infrared sensors; Mobile computing; Operational amplifiers; Particle filters; Position measurement; Radio transmitters; Wearable computers; Wearable sensors;

fLanguage

English

Publisher

ieee

Conference_Titel

Wearable Computers, 2006 10th IEEE International Symposium on

Conference_Location

Montreux

ISSN

1550-4816

Print_ISBN

1-4244-0597-1

Electronic_ISBN

1550-4816

Type

conf

DOI

10.1109/ISWC.2006.286341

Filename

4067724