08-12-2012, 05:02 PM
Efficient Public Transportation System (GPS & Smart Card)
Efficient Public Transportation.ppt (Size: 1.28 MB / Downloads: 42)
Objective
Design website (GUI) to use GPS services and online recharge of smart card.
GPS-based surveillance.
Our aim is to provide bus ticket top-ups over internet.
An efficient e-ticketing system.
Motivation
Public transport vehicles (bus) frustrated everyone cause of their irregularities leaving everyone late or in heat, rain.
We wanted to know when the bus will come.
We want to device an application that will help locating such vehicles online.
What is it?
GPS: Global Positioning System is a worldwide radio-navigation system formed from a constellation of 24 satellites and their ground stations.
Overview
Official name of GPS is NAVigational Satellite Timing And Ranging Global Positioning System (NAVSTAR GPS).
Global Positioning Systems (GPS) is a form of Global Navigation Satellite System (GNSS).
First developed by the United States Department of Defence (DoD).
The History of GPS
Feasibility studies begun in 1960’s.
Pentagon appropriates funding in 1973.
First satellite launched in 1978.
System declared fully operational in April, 1995.
Master Control Station
The master control station is responsible for overall management of the remote monitoring and transmission sites.
GPS ephemeris is the tabulation of computed positions, velocities and declination of GPS satellites at specific times for eventual upload to GPS satellites.
Ground Antennas
Ground antennas monitor and track the satellites from horizon to horizon.
They also transmit correction information to individual satellites.
User Segment
User's GPS receiver is the US of the GPS.
GPS receivers are generally composed of an antenna, tuned to the frequencies transmitted by the satellites, receiver-processors, display for showing location and speed information to the user and a highly-stable clock.
A receiver is often described by its number of channels this signifies how many satellites it can monitor simultaneously.
Working
The device consists of a micro-controller interfaced with a GPS and a GPRS module.
The GPS module receives the information of the vehicle and passes it to controller.
The controller extracts the required information and makes a packet out of it that consists of geographical data and other information.
This packet is passed to the GPRS device that is configured for point to point service.
The remote receiver consists of a GPRS module interfaced with PC.
Software will display the current position of the vehicle on the map.