15-03-2011, 03:49 PM
presented by:
S.Indhira
K.Sankari
K.Suganyadevi
S.Vijayalakshmi
[attachment=10219][attachment=10219]
Automatic Accident Identification System Using Wireless Technology
Accident statistics
India's road accident record:16 % of the world's road accident death happen in India , while India has only 1 % of the world's road vehicles
Mumbai’s 26/11 killed 195 people.
About 250 people die in road accidents in India everyday!
SO THERE IS A 26/11 EVERYDAY ON INDIAN ROADS
WHICH IS A BIGGER KILLER?
The Solution
Our system aims at providing help to the injured in road accidents as fast as possible, thereby increasing the victim’s survival chances.
Proposed System :
In our proposed model we have 3 modules, they are as follows
Vehicle side module
Road side module
Control room side module
The vibration sensor senses the vibration and sends the signal to the microcontroller, which compares the input from the vibration sensor with the fixed delay of 30 seconds( delay period of switch ).
when the switch is pressed then the output of the microcontroller is 0, when the switch is not pressed then the output is 1.
If the output is 1 then the IR transmitter transmits the signal to the road side IR receiver which is placed along with the sign board( Km board, lamp post, etc ). Each IR receiver will have a different frequency so that the accident spot can be found easily by the patrol
CONTROL ROOM:
Circuit Components:
Vibration Sensors
Power Supply
Switch
Microcontroller (8051)
Buzzer
IR Transmitter
IR receiver
Relay
Wireless Transmitter
Wireless Receiver
Embedded Microcontroller
Power Supply:
Vibration Sensor:
It is a highly fabricated one.
Vibration sensor is placed on the ballot of the vehicle.
Microcontoller(8051):
Microcontroller is used to compare the signal from the vibration sensor with the delay period of 30 secs.
The output is generated only if the switch is not pressed.
Pin Description of the 8051
IR Transmitter:
Symbol and operation of IR transmitter is very similar to ordinary LED, Light Emitting Diode.
LED emits ordinary light. IR transmitter generates infrared. IR transmitter is made up of Gallium arsenide.
If we pass the current to gallium arsenide it produces IR rays.
Current applied to the sensor is directly proportional to the rays emitted
We have used 1K resistor from 5V dc to the IR transmitter to restrict current flow beyond 5mA.
Even though IR transmitter can
withstand up to 35mA, we have used 5mA due to shortest distance. If
the distance is more we have to increase the current flow to the transmitter.
IR Receiver:
IR receiver is having reverse characteristics of the IR transmitter
IR Receiver will conduct as long as the rays falls on it.
In our project we are going for IR transmitter and receiver, but in real time instead of IR, wireless is to be used.
Since IR can be used only during proper alignment position.
Wireless Transmitter:
We are going to implement 433.92 MHz RF transmitter to our project for effective, quick, reliable type and its operated at12v dc.
This can be switched by relays.
BLOCK DIAGRAM OF TRANSMITTER
433.92 MHz carrier frequency generator will be used in this for short distance reliable data communication. In winter, distance of communication is 100metres and in summer this will be approx 300 meters.
36,37,38,39 kHz modulation freq generator, will be used to differentiate the signal delivered for various applications. This is the real data to be executed for mechanical movement.
Mixer encoder
This is to mix carrier and modulation system and encoded for signal transmission.
Wireless Receiver:
Wireless receiver is having reverse characteristics of the wireless transmitter.
It is placed in the control room
Embedded Controller:
Peripheral Interface Controller (PIC) is enhanced version of microcontrollers. It is an embedded controller
