Description in detail:
In this project we are going to use an accident detection unit which will be fitted inside the front and rear bonnet of the car. This accident detection unit consists of two metallic plates which are kept at little distance apart from each other. In case of accident, if the car is hit to some other vehicle or an object then due to the impact the two metal plates will come in contact with each other. Due to this a signal will be sent to microcontroller. Microcontroller is the central processing unit CPU of our project. Once microcontroller gets signal from metal plates, then it will immediately turn on the buzzer.
A key will be provided for the driver. If the accident is very normal, or driver has hit the wall in some situations like parking then driver will press the key. This will inform the microcontroller that this is a very normal accident. But if driver is not in situation to press the switch or if the accident is really a major accident then driver will not press the key. Then microcontroller will get the coordinates from the GPS modem then it will send this information to the GSM modem, GSM modem is used to send this information via SMS. SMS will be sent to the family member of the driver, so that they can take immediate action to help the persons suffering due to this accident.
Contents of Text sms are as below:
Accident has occurred.
Longitude = 18 38.6878 N
Latitude = 73 45.3423 E
Enhancement / Feature added to this project:
In this project we have added alcohol sensor. Purpose of Alcohol sensor is to detect the consumption of alcohol by driver of vehicle. This will help to prevent the accident caused due to “Drink and drive” condition. By implementing alcohol sensor project will be “Vehicle accident detection and prevention”. We are informing owner of the car through SMS that the driver has consumed alcohol. The alcohol sensor will be placed on the steering wheel of the car. Which means sensor will be just near the driver of vehicle. Purpose behind this is that if some other person has consumed the alcohol then it should send SMS. For example the person near the driver or backseat. If person other than driver has consumed alcohol then sensor will not detect the presence of alcohol. This is because range of sensor is low. Sensor detects only the percentage of alcohol in air which is near the steering wheel. This alcohol sensor is analog sensor and as microcontroller is not able to read the analog voltage, so we have used comparator. The output of alcohol sensor is variable voltage. As the alcohol percentage increases the voltage will also increase. So when there is no alcohol consumption, low voltage will be there at the output. And when person has consumed the alcohol, voltage will increase. So we have used a comparator, this comparator has a fixed voltage at its positive input. And at the negative input, voltage from output of analog alcohol sensor is given. Whenever voltage of sensor crosses the threshold voltage level, then comparator gives low output to the microcontroller. This way microcontroller detects the output from the alcohol sensor. Then it sends out SMS to the owner of the car indicating that the driver has consumed the alcohol. This SMS will also contain the longitude and latitude. So by this way the owner will also come to know the location of vehicle.
Applications and Advantages:
1) School transport vehicle accident detection: “Vehicle Accident Detection system”can be used in the school bus.
2) This project can be used for cab or car of companies.
Future Development:
1. We can monitor some parameters of vehicle like overheat or LPG gas leakage
2. We can dial an emergency call if the vehicle goes out of a certain / pre-decided track.
Video of the project: Vehicle Accident Detection with GPS and GSM modem
Youtube video coming soon