The GETA Sandals: A Footprint Location Tracking System. Kenji Okuda, Shun-yuan Yeh , Chon-in Wu, Keng-hao Chang, and Hao-hua Chu National Taiwan University. What is GETA?. a kind of the traditional Japanese sandals. Outline. Motivation Related works Basic idea
Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.
Kenji Okuda, Shun-yuan Yeh, Chon-in Wu, Keng-hao Chang, and Hao-hua Chu
National Taiwan University
(deployment, calibration, maintain)
(not succeed so far in this paper-> low infrastructure)
( 180, 200 )
( 0, 0 )
Coordinate system 2
Coordinate system 1How to sum up those vectors mathematically
Coordinate system 1’
Need coordinate transformation for each left foot step.
side viewDesign version I
d2Why using two transmitters
Can Not be rotated any more !
side viewDesign version II
Error DisplacementTwo Main Error Sources
Fig1. Ultrasonic device err
Fig2. Orientation sensor err
Adds a RFID reader in the GETA and put some tags in the environment.
Calculated Path of the user
Real Path of the user
Ultrasonic Receivers board (with 2 Ultrasonic receivers)
Ultrasonic transmitterDesign version III
The positioning error under different tag density over the walking distance.Design III Performance Evaluation
(reducing the orientation error)