26-07-2012, 10:33 AM
ALCOHOLIC SENSOR AUTOMATIC VEHICLE CONTROL
ALCOHOLIC SENSOR AUTOMATIC VEHICLE CONTROL.ppt (Size: 1.3 MB / Downloads: 101)
INTRODUCTION
In this project whenever driver try to start his vehicle he has to touch the switch then alcoholic sensor is sense alcoholic person for it ,if the sensor sense that correct then only the vehicle will start otherwise vehicle is not start buzzer will run to bring the attention of the vehicle passengers.
In this way a this system is quite secure, cost effective and reliable for no alcoholic person can will first understand the basic need of the project and will design a software for it start the vehicle. It is an embedded project which is combination of hardware and software .we study more and then will work on the hardware .
It is microcontroller based project and in this project we used the three important controller ex. +5 volt,crystal,reset,
POWER SUPPLY SECTION
RLMT CONNECTOR:
It is a connector used to connect the step down transformer to the bridge rectifier.
BRIDGE RECTIFIER :
It is a full wave rectifier used to convert ac into dc , 9-15v ac made by transformer is converted into dc with the help of rectifier.
CAPACITOR:
It is an electrolytic capacitor of rating 1000M/35V used to remove the ripples. Capacitor is the component used to pass the ac and block the dc.
REGULATOR:
LM7805 is used to give a fixed 5v regulated supply.
CAPACITOR:
It is again an electrolytic capacitor 10M/65v used for filtering to give pure dc.
CAPACITOR:
It is an ceramic capacitor used to remove the spikes generated when frequency is high(spikes). So the output of supply section is 5v regulated dc.
MICROCONTROLLER SECTION
+5V SUPPLY:
This +5v supply is required for the controller to get start which is provided from the power supply section. This supply is provided at pin no.31and 40 of the 89c2051 controller.
CRYSTAL OSCILLATOR:
A crystal oscillator of 12 MHz is connected at pin no.19,x1 and pin no.18,x2 to generate the frequency for the controller. The crystal oscillator works on piezoelectric effect.The clock generated is used to determine the processing speed of the controller. Two capacitors are also connected one end with the oscillator while the other end is connected with the ground. As it is recommended in the book to connect two ceramic capacitor of 20 pf—40pf to stabilize the clock generated.
RESET SECTION:
It consists of an RC network consisting of 10M/35V capacitor and one resistance of 1k. This section is used to reset the controller connected at pin no.9 of AT89c51.
WORKING OF PROJECT
In this project we are using a microcontroller, buzzer, LCD and switch matrix .Switch are used for ON and OFF when any one touch then gas sensor is sense then the microcontroller will check the condition that his person is alcoholic or not with the stored condition, in the controller if the person drink alcohol matches then the relay gets on which in turn gets on the starter and the vehicle will started To the microcontroller a buzzer is connected if the alcoholic person do not match then it understand that it is an unauthorized person and it ring the buzzer on .
CONCLUSION
This project gave us the deep understanding of the controller and described us how to use the controller in different ways as well as provided us the clarity about the different sensors . This is embedded based project as embedded is the combination of both the software as well as the hardware so this system helped us to clear all our doubts related to basic electronic components.