VIGILANT: Smart Phone Navigation for Visually Impaired pedestrians - PowerPoint PPT Presentation

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VIGILANT: Smart Phone Navigation for Visually Impaired pedestrians

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Software package and subscription for $49.99/yr. TECHNICAL GOALS Receive differential GPS ... GPS System. CURRENT STATUS ... Navigation for Visually Impaired ... – PowerPoint PPT presentation

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Title: VIGILANT: Smart Phone Navigation for Visually Impaired pedestrians


1
VIGILANTSmart Phone Navigation for Visually
Impaired pedestrians
  • Name Affiliation
  • Anani Afanou ECE4007 L02
  • Arpan Ghosh
  • Daniel Newsome Date
  • Ken Orji March 9, 2009

2
Overview
  • What?
  • Pedestrian turn-by-turn navigation using a
    Google G1 mobile phone
  • Who/Why?
  • Current navigation solutions for the visually
    impaired are cumbersome
  • Cost?
  • Software package and subscription for 49.99/yr.

3
Technical Goals
  • Receive differential GPS corrections
  • Remove noise using Kalman Filtering
  • Provide turn by turn navigational instructions
  • Dynamically updated
  • Pinpoint navigation destination
  • Within 1 meter accuracy
  • Supply user-friendly interface
  • Audio-based

4
Product Image
5
Design Approach
  • DGPS Base Station
  • Accepts connections and transmits corrections
    values over LAWN
  • G1 Smart Phone
  • Connects to DGPS server and receives corrections
    (WLAN)
  • Send corrections to receiver and gets back
    corrected user position (Bluetooth)
  • GPS Receiver (with user)
  • Calculates users position from satellite(s)
  • Applies DGPS corrections to calculated position

6
Smart Phone Interface
  • G1 Smart Phone (UI)
  • Scrollable list of bldgs. _at_ Tech
  • Google Maps - directions in real time.
  • Current user location to bldg. selected in list
  • Audio feedback of directions and list selections
  • Kalman filtering removes noise.

7
Calculating Correction of Satellite
Calculating User Position from Satellite
DGPS Corrections
User Position with Noise Removed
lt DGPS Corr. gt User Position
User Position from Receiver
Kalman Filter
8
Demo Description
  • Place Gatech Campus
  • Option1
  • Blindfolded team member navigates with VIGILANT.
  • Option2
  • Visually impaired volunteer navigates with
    VIGILANT

9
Potential Problem(s)
  • Problem
  • Some devices might not be Bluetooth compatible.
  • Resolution
  • Use hard wire instead (serial port).

10
Milestones
  • Bluetooth/wireless connection of G1 to DGPS
    system
  • Map interface on the G1 completed.
  • Kalman filter code for Android completed.
  • User Interface
  • Text to speech/audio UI
  • First complete application testing
  • Finish all testing
  • Ready for demo

11
Budget/Cost Analysis
  • Main cost is labor
  • 10,500 Four engineers design/build the product
    for 300 hours at 35/hr.
  • Other costs
  • T-Mobile G1 phone priced at 179.99 with
    contract, 399.99 without a contract. (Not
    included in total cost)
  • Marketing
  • VIGILANT product can be sold, as software
    package, for a fee of 49.99
  • Cheaper than the 1,649 price of competitors like
    the Sendero GPS System.

12
Current Status
  • Received the HTC G1 phone from Google.
  • Confirmed that DGPS base station is up and
    running.
  • The team is currently
  • Working with DGPS base station to test GPS
    Receiver.
  • Researching a way to implement Kalman filtering
    accurately on Matlab.
  • Working on code to seamlessly implement text to
    speech together with Google Maps on the G1 phone
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