Technology Overview

The Tracking System Comprises of

  • A Hardware unit which is mounted in the vehicle.
  • A Control Station which communicates with the device.
  • A PC on the Internet which displays the position of the vehicle.

The Automatic Vehicle Locator computes an exact latitude and longitude position when it receives data from at least 4 GPS satellites.

This position and certain other data such as heading (direction), speed and time are encoded, compressed and sent over the GPRS/GSM network to the Control station.

  • The time interval between position signals is set to send a signal every 99 minutes if the vehicle is stopped and at every 1Km when travelling.
  • Any change in state of the digital inputs also results in a position signal being sent.
  • The time interval between position signals can be set or changed from the Control Station or the end user's screen.
  • Data is sent in an encrypted format, so it cannot be decoded by anybody except the intended receiver.
  • Data is sent in an encrypted format, so it cannot be decoded by anybody except the intended receiver.
  • The frequency of the signals is set
  • Besides time, speed, position and heading, other telemetry parameters can also be monitored.
  • The Control station sends the decoded data from the Vehicle to the Web server. The Web server displays the position of the vehicle together with any other data specified, on the map. The data is also stored in a database, so that it can be played back and a record kept for future use.

When a client logs into the web server, he is identified through his user name and password.

  • The client is then presented with a list of vehicles he is permitted to view.
  • The client can select the vehicles he would like to track.
  • Vehicles can be identified by giving them different color icons.
  • There is an option to view the history/track of the previous positions on the current route, e.g. one can choose to view the last 5 positions, 100 positions (any number) etc. for a particular vehicle. The map will then display the current location of the vehicle (which will be constantly updated) together with specified number of previous positions selected.
  • The map has various 'zoom' levels which allow one to view a smaller area of the map in greater detail. On zooming into areas of the map, landmarks and
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