How the idea was implemented !!!

We connected the bike and helmet wirelessly using RF Module.
We have made two ends -
1)Transmitting end(Helmet)
2)Receiving end(Bike) 

The initial step is wearing helmet, so we have used switch to ON button i.e. push switch as the helmet sensor which is placed inside the helmet where upper head part will have better contact with helmet.
As soon as the helmet is worn the push switch is pressed and the positive signal is send to the receiver that "helmet is worn" which is displayed on LCD display at the receiving end and the bike can be started, if not then bike cannot be started and further no detection is possible.

Image result for push switch
Fig: push switch
In the second step,the alcohol content is measured whether the biker is drunk or not. Here we have used alcohol sensor MQ-3 (gas sensor suitable for detecting alcohol) which is placed inside the helmet near mouth part where the breathe of the biker is blown to alcohol sensor. If the content of the alcohol consumed by the biker is 120ppm or more, then the biker is drunk and the bike will immediately be turned off, and the LCD display will show that "biker is drunk" and vice versa.
Image result for alcohol sensor mq3
Fig: Alcohol sensor MQ-3

The third step is detecting the occurrence of accident by the help of vibration sensor SW-420 as well as the GSM and GPS module. 
The vibration sensor is placed outside the helmet at back of the head where there is  maximum vibration and GPS and GSM  is placed on the bike.
If there is vibration more than the threshold value  then the vibration sensor send give a positive signal to the receiver end that the accident has happened. The GPS at the receiver end will fetch the location by locating the latitude and longitude of the location and by the help of GSM the message will be sent to the emergency number of the rider showing the message "Accident happend..!! Help me!!" with the link of google map showing the location of the accident place.

Image result for gps module
Fig: GPS Module
Image result for vibration sensor sw 420
Fig: Vibration sensor SW-420
Image result for gsm module
Fig: GSM Module

NOTE:All the steps are in flow.

All the sensors and modules i.e.all hardware are interfaced with Arduino UNO, the programming is done on the software Arduino IDE and simulation on the software PROTEUS.


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