APPLICATIONS

What can you do with it?

• Tracking friends on campus

• Updating bus schedule– Refined schedule for UMass buses

• MIE’s Supermileage Vehicle– Recording engine activity for fuel

efficiency

SYSTEM OVERVIEW

GPS Buffer Serial/Wireless Database User Interface

HARDWARE ARCHITECTURE

Queuing System

HARDWARE ARCHITECTURE

• Position– Latitude– Longitude– Altitude

• Time• Error

CIRCULAR BUFFER

• Shared Variable– Counter

• Queuing System

CHALLENGES

• Interprocess Communication– Shared Memory– Mutual Exclusion

• Scarce I/O Pins Availability in PIC– Memory Controller

•PLD – Programmable Logic Device

• Memory Size– 8Kbtye Memory– Cost

QUERIES

• Allows to search by:– Location

• Latitude• Longitude

– Time and Date– Track Name– Track Description– Extra track tags

User InterfaceQuery & Data

Access

Database-Tracks: Latitude,

Longitude, Altitude, Position Error, Time & Date

- Index of points, name, description

KEYHOLE GUI

KEYHOLE GUI

DEVICE CHARACTERISTICS

• Weight2.4 lb

• Power Consumption2.4 W (320Ma @ 7.5V)

• Battery LifeAbout 7.5 Hours with 2400 mAhr battery

• Range of Wireless7 Miles Line of Sight¼ Mile Urban

PROTOCOL

Tracking Device Base Station

Base station sends requestTracking device receives request and sends data packet Base station receives data

packet and sends acknowledgmentTracking device receives

acknowledgment and reads next entry from memory

Base station sends request

Packet Incomplete Base station times out and

resends sends request

Acknowledgment Lost

When acknowledgment is lost, base station times out and resends request. Duplicate data will be received and acknowledged, but not stored.

Tracking device receives request and sends data packet

Normal Operation

Packet Incomplete

Acknowledgment Lost

Tracking device receives request and sends data packet but link is interrupted

PROJECT GOALS

• Read Data From GPS Into PIC • Store Data Into Memory• Retrieve Data From Memory

and Send Over Serial Link• Store Data into Database• Retrieve Data from Database• Display Data Using User Interface

SOFTWARE

User InterfaceGet Data from Tracking Device into Database

Query DatabaseGraphically Display Data

Database-Tracks

(Location, Time, Sensor Data)

Tracking Device

Serial

LOCATION AWARE

INFORMATION SYSTEM