GETA Sandals: Wearable Indoor Self Location Tracking System
Date Issued
2006
Date
2006
Author(s)
Yeh, Shun-Yuan
DOI
en-US
Abstract
This paper presents the design, implementation, and evaluation of our wearable indoor self location tracker. This is the extension work of our footprint-based location tracking system. In this work we design two methods called the ultrasound-based method and the accelerometer-based method to independently measuring and tracking displacement vectors along a trail of footsteps. The position of a user can be calculated by summing up the current and all previous displacement vectors. Unlike most existing indoor location systems, the footstep-based tracker does not suffer from problems with obstacles, multi-path effects, signal interferences, dead spots and demands little infrastructure in the environment. We evaluate our two methods with a traditional Japanese GETA sandals equipped with force, ultrasonic, orientation, RFID sensors and an accelerometer. There are two technical challenges in the proposed design: (1) location error accumulates over distance traveled, and (2) displacement measurements are sporadic during stair climbing. The first problem is addressed by a light RFID infrastructure, while the second problem is remedied by incorporating the accelerometer-based method into the system.
Subjects
室內人員定位系統
普及計算
穿戴式系統
GETA
indoor location system
ubicomp
wearable
Type
thesis
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