1.0 INTRODUCTION

This work discusses about alcohol sensing alert with engine cut-off system. Nowadays, higher percentages of accident that occur on high ways are caused by drinking alcohol – drunk drivers. So here we propose an innovative system to eliminate such cases. Our proposed system would be constantly monitoring the driver breath by placing it on the driver wheel or somewhere the drivers breath can be constantly monitored by it. So if a driver is drunk and tries to drive the system detects alcohol presence in his/her breathe and locks the engine so that the vehicle fails to start. In another case if the driver is not drunk while he starts the vehicle and engine is started but he/she drinks while driving the sensor still detects alcohol in his breath and stops the engine so that the car would not accelerate any further and driver can steer it to roadside. In this system we use an an arduino microcontroller with an alcohol sensor along with an LCD screen and a dc motor to demonstrate the concept. So here the alcohol sensor is used to monitor users breath and constantly sends signals to the microcontroller. The microcontroller on encountering high alcohol signal from the alcohol sensor displays alcohol detection note on LCD screen and also stops the dc motor to demonstrate as engine locking. The system needs a push button to start the engine. If alcohol is detected at the time of starting the engine the engine does not start at all. If alcohol is detected after engine starting, the system locks the engine at that time.

1.1 BACKGROUND OF THE STUDY

The Nigerian government has been advising its citizens not to drink and drive for decades, but for the first time, it may be able to physically stop you from getting behind the wheel while hammered. 

The main purpose behind this project is “Drunk driving detection”. Now a days, many accidents are happening because of the alcohol consumption of the driver or the person who is driving the vehicle. Thus Drunk driving is a major reason of accidents in almost all countries all over the world. Alcohol Detector in Car project is designed for the safety of the people seating inside the car. Alcohol breath analyzer project should be fitted / installed inside the vehicle [1][2][3].

The main unit of this project is an “Alcohol sensor”. If the person inside car has consumed alcohol then it is detected by the sensor. Sensor gives this signal to a comparator IC. The output of comparator is connected to the arduino microcontroller. Arduino microcontroller is the heart of this project. It is the CPU of the complete circuit. Arduino microcontroller gives high pulse to the buzzer circuit and the buzzer is turned on. At the same time a relay is turned off. Due to this the ignition of the car is deactivated [4].

1.2 PROBLEM STATEMENT

Nowadays major accidents occur on road because of increase in traffic and rash or asleep driving of the drivers. Several accidents occur attributable to consumption of alcohol. So alcohol dinked driving is additionally vital reason for accident happens. The alcohol detection in-car system is supposed for the cover of humans seating within the car and in several things, would like the auto and police authority isn't hip in time. Because of this kind of accident, the help given to the sufferer is delayed.

1.3 OBJECTIVE OF THE PROJECT

The objective of this work is design a drunken driving detecting device, which detects the percentage of alcohol and displays the same on an LCD display. It also sounds an alarm if the amount of alcohol exceeds a particular amount.  

1.4 PROJECT MOTIVATION

There is such a large amount of car users who drove a car with Consumption of alcohol, which is the reason for a most of car accidents. Also once Associate in an accident occurs at non-residential place or highways, in this condition most important is to offer primary aid (healing) service to injured human by the support of ambulance. So it was also necessary to include accident detection as well as location detection and this info given to the nearest police/ ambulance emergency service center help of wireless media like SMS (Short Message Service). This can help to reduce the number of accidents occur due to alcohol drunk consumption. In several car accidents there is a possibility of fire. Therefore during this dangerous situation to save individuals people life with the help of fire fighting blower to stop fire yet as data given to the nearest, police station, fire brigade and ambulance emergency service center. Proper seat belt detection is better than traditional seat belt detection. Sometimes there is a possibility of misuses safety harness lock using directly attach of extra safety harness buckle without pull of safety harness by a driver. Therefore car system detects attach the safety belt. By reducing this sort of misuse of safety harness detection within the vehicle, therefore necessary to detect correct seat belt [12].