GPS Map Of University of New Hampshire

forestevanescentΗλεκτρονική - Συσκευές

2 Νοε 2013 (πριν από 3 χρόνια και 9 μήνες)

69 εμφανίσεις

GPS Map Of University of New Hampshire

Timothy Davis

Advisor: Frank
Hludik

Block Diagram Of GPS System

Problem Definition:

Design and implement a hand held GPS navigation system. This system
displays
a map of the University Of New Hampshire
campus and the users location
on
an LCD
screen.
The system
also displays longitude and latitude and
the number
of satellites
being used to calculate the location.

Microcontroller

The microcontroller reads information
from the GPS receiver and
updates
the
LCD Screen accordingly.
The microcontroller is able to read, process and display
data on the LCD screen fast enough to keep up with the users rate of travel. The
CSMB12XDT512
from Axiom
Manufacturing was chosen
for this
project, this
particular microcontroller was chosen for its x
-
gate coprocessor and the two
SCI ports for communication with the LCD screen and GPS modules.

LCD Screen

This is a color
screen with the ability to display
both
images and
text. I chose
the µLCD
-
32PT(SGC
) from 4 D systems for this project. This LCD screen
interfaces with the microcontroller using serial communication and has the
ability to display images from a micro
-
SC card.

GPS Receiver


The
GPS receiver
uses serial communication to communicate with
the
microcontroller. The GPS receiver
provides
information
indicating
which
satellites are visible, the current location, the speed and direction of travel and
the strength of the satellites’ signal. T
he FV
-
M8 GPS
Receiver
Module from San
Jose Navigation was chosen for its selectable baud rate, accuracy and low
power consumption.

Displaying Current Location

Initially a map is chosen with a known range of longitude and latitude. The
size of the image is reduced
to 320X240
pixels, the size of the LCD screen.
Finally the change in longitude/latitude each pixel represents is
determined, allowing the microcontroller to calculate where to display the
position on the screen.

Global Positioning System


Control Segment


Control/Monitoring stations located all over the
world


Upload navigation data to satellites


Adjust orbit of satellites


User Segment


Most receivers can gather data from 12 satellites at
a time


Receives navigation messages from satellites


Uses navigation messages to calculate current
position


Space Segment


30 satellites continuously transmitting position and
time


6 visible from any point on earth

Future Expansion


Implement the touch screen to allow for a scrolling feature of the
map.


Implement a low power mode


Implement a feature the allows a user to record the path traveled and
speed


Display more information, for example speed, elevation and direction
of travel.


Screen Shot Of GPS Map

Global Positioning System

GPS System

CSMB12XDT512 Development Board