ACCIDENT IDENTIFICATION USING GPS AND GSM
Published Thursday 6 October 2011 by gk inACCIDENT IDENTIFICATION USING GPS AND GSM
Abstract:
The Global Positioning System (GPS) is a satellite-based navigation system made up of a network of 24 satellites placed into orbit by the U.S. Department of Defense. GPS was originally intended for military applications, but in the 1980s, the government made the system available for civilian use. GPS works in any weather conditions, anywhere in the world, 24 hours a day. There are no subscription fees or setup charges to use GPS.
GPS satellites circle the earth twice a day in a very precise orbit and transmit signal information to earth. GPS receivers take this information and use triangulation to calculate the user's exact location. Essentially, the GPS receiver compares the time a signal was transmitted by a satellite with the time it was received. The time difference tells the GPS receiver how far away the satellite is. Now, with distance measurements from a few more satellites, the receiver can determine the user's position and display it on the unit's electronic map.
The project consists of a microcontroller which is interfaced with the Gps module, gsm modem and a vibration sensor. for fetching the data from the Gps module. Once the microcontroller senses the strong vibration, it assumes an accident. From the instance of vibration it starts an alarm. For a time period say approx 15 to 25 seconds. If the peoples are safe they should press a emergency switch to stop the alarm. If none of the people fails to press the switch within the specified time. The controller assumes it as an emergency and starts the gsm modem sending the latitude and longitude information to the specified mobile number, by fetching the information from the Gps. The data from the Gps module is obtained at a baud rate of 19200 BPS. With a specified format with various unwanted and mixed strings of data. The microcontroller reads the required data and eliminates the unwanted data. Thus the data fetched is only the latitude, longitude and is displayed in LCD for our reference. A typical data from the Gps module will be of the following format; anyway we are not using all the data from the module, the following is just an example.
SOFTWARE REQUIREMENTS:
1) Keil microvision ide
2) Embedded c
HARDWARE REQUIREMENTS:
1) 5v power supply
2) 3v power supply
3) Gps module
4) AT89C51
5) Lcd 2 line 16 char
6) Max232
7) Gsm module
8) Serial port- db9 connector
9) Gps receiver antenna
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