The Project Submitted In Partial Fulfillment Of The Requirements For The award Of Degree Of Master Of Science In Automotive Technology

Abstract

Driving The Vehicles By Drunken Drivers Is One Of The Major Reasons Causing Vehicle Collisions Which Is Increasing Day By Day Affecting Economically The Society And The Country As A Whole. In This Connection To Minimize The Collisions Caused By The Drunken Drivers, It Is Aimed To Design And Develop A System Which Detects The Alcohol Content In The Air Exhaled By The Driver In The Vehicle And Automatically Turns Off The Car If Alcohol Percentage Exceeds The Limit Avoiding To Drive The Vehicle. The Design Of This Project Includes The Development Of Hardware And Software As The Device Modules. Hardware Part Includes The Sensor Circuit, The Pic16f877a Microcontroller Circuit, Lcd Circuits And Buzzer As The Alarm & Relay Circuit. The Alcohol Sensor Was Used In This Project To Detect The Of Alcohol Content In The Air Exhaled By The Driver. A Program Is Developed Using C Program And Embedded In To A Microcontroller Pic16f877a, For Receiving Analog Data From Alcohol Sensor, Analyzing It And Controlling Ignition System. Pic Micro controller Compares The Data Which It Receives From Alcohol Sensor, Compares It With The Thres hold Values And If The Value Is Beyond The Limit It Takes Appropriate Action Like Turning Off The Ignition System To Avoid The Driver From Driving The Vehicle. An Electro Mechanical RelayIs Used To Control The Ignition System. Based On The Values That Were Detected The System Also Gives Waning To The Drunken Drivers Via Alarm From Buzzer, Lcd And Finally Disables The Ignition Switch To Stop From Driving The Vehicle. The Developed System Was Tested ForIts Functionality And It Is Observed That The System Is Working As Per Expectations.