30-01-2013, 01:47 PM
VEHICLE ANTICOLLISION USING ULTRASONIC SIGNALS
VEHICLE ANTICOLLISION.ppt (Size: 137 KB / Downloads: 92)
ABSTRACT
The aim of the project is to avoid vehicle collision.
We can avoid these things by using ultrasonic anti-collision instrument.
This instrument is fixed in front side of the vehicle. If any vehicle or obstacle comes near by this vehicle, immediately this instrument will raise an alarm and it will stop the vehicle.
WORKING PRINCIPLE
The vehicle collision can be avoided by using this project.
The microcontroller switches ON the ultrasonic transmitter and traces other vehicles in front of it using ultrasonic waves and receives the echo signal at the ultrasonic receiver.
By doing distance measurement calculation from our program, the system can find out the distance of opposite vehicle from our vehicle.
If the distance is our set value, the buzzer will give a warning beep.
The controller will energize the braking system.
Thus vehicle collision is avoided.
POWER SUPPLY
The microcontroller and other devices get power supply from AC to DC adapter through voltage regulator.
The adapter output voltage will be 12V DC non regulated
The 7805 voltage regulators are used to convert 12 V to 5V DC.
However we are using 9V batteries instead for easy and safe handling of our project.
ULTRASONIC RAYS
Ultrasonic is acoustic energy in the form of waves having a frequency above the human hearing range.
Ultrasonic can be used to locate objects by means similar to the principle by which radar works
These high-frequency acoustic waves reflect from objects.
The distance to an object can be determined by measuring the delay between the transmission of an ultrasonic pulse and the return of the echo.
Applications of Ultrasonic Rays
Ultrasonic rays are used in electronic, navigational, industrial, and security applications.
It is also used in medicine to view internal organs of the body.
Ultrasonic rays are used in industry to analyze the uniformity and purity of liquids and solids.
Ultrasonic rays can be used in sonar systems to determine the depth of the water in a location.
MICROCONTROLLER-AT89C52
The AT89C52 is a widely available in market, cost effective, low power and high-performance CMOS 8-bit microcontroller.
The device is manufactured using Atmel’s high-density nonvolatile memory technology and is compatible with the industry- standard 80C51 instruction set and pin out.