In this project it is proposed to design an embedded system which is used for tracking and positioning of any vehicle by using Global Positioning System (GPS) and Global System For Mobile Communication (GSM).
In this project 8052 microcontroller is used for interfacing to various hardware peripherals. The current design is an embedded application, which will continuously monitor a moving vehicle and report the status of vehicle on demand. For doing so an 8052 microcontroller is interfaced serially to a GSM Modem and GPS Receiver. A GSM modem is used to send the position (Latitude and Longitude) of the vehicle from a remote place. The GPS modem gives many parameters as the output, but only the NMEA data coming out is read and displayed on to the LCD. The same data is sent to the mobile at the other end from where the position of the vehicle is demanded. An EEPROM is used to store the data received by GPS receiver.
In order to interface GSM modem and GPS receiver to the controller, a MUX is used. The design uses RS-232 protocol for serial communication between the modems and microcontroller.
When a request by user is sent to the number at the modem, the system automatically sends a return reply to that particular mobile indicating the position of the vehicle.
A program has been developed which is used to locate the exact position of the vehicle and also to navigated track of the moving vehicle on Google Map.
The proposed system is used for positioning and navigating the vehicle with an accuracy of 10m.
The exact location is indicated in the form of latitude and longitude along with the exact Navigated track on Google map.
The system tracks the location of particular vehicle and sends to users mobile in form of data and also to microcontroller. The arrived data, in the form of latitude and longitude is used to locate the vehicle on the Google maps and also we can see the output on the LCD.
Figure: Transmitter Block Diagram
Figure: Receiver Block Diagram
Accurate Vehicular Positioning using a DAB-GSM Hybrid System The Global Position System (GPS) and the Global Navigation Satellite System (GLONASS) are based on a satellite system. Much work has been carried out on a non-satellite positioning system using the existing Global System of Mobile Communications (GSM) infrastructure. This leads to a GPS-GSM positioning system that manufacturers claim to reliably locate a mobile phone down to resolutions of less than 125 m . The requirement needed to achieve such a resolution with a GPS/GSM positioning system is to have three GSM base stations in a 30 km area. This requirement is difficult to obtain especially in rural areas. The work carried out in this paper is how to integrate Digital Audio Broadcast (DAB) transmitters with GSM base stations for positioning systems. This novel DAB-GSM hybrid positioning system can reach an accuracy of 40 meters. Much work has been carried out in the field of terrestrial positioning system based on the GSM network. This GPS-GSM positioning system is a cheap alternative to the existing GPS and GLONASS systems. This system can achieve a resolution of less than 125m . However in rural areas, where the GSM infrastructure is sparse, this resolution can not be obtained. This is due to the fact that the GPS-GSM system requires three GSM base stations in an area of 30 km to function adequately. The work carried out in this paper was to investigate the methodology of integrating DAB transmitters to the GPS-GSM system in order to obtain adequate level of resolution in rural areas. This new DAB-GSM hybrid system was mathematically modelled using the OPNET software package. The results show that with such a hybrid system an accuracy of 40 meters can be reach. This makes such a system suitable for positioning in rural areas, where only the GSM infrastructure is not sufficient.
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