This project CAN BASED COLLISION AVOIDANCE SYSTEM(CAN) is intended for secure and smooth journey.

If the driver himself is not concentrating on driving or any other parameters, which may cause damage to vehicle as well a life, this intelligent car/ vehicle warn the driver regarding the danger ahead.

Due to the driver’s distraction, a serious collision accident

may occur if the driver can not react in time to brake.

For the front-end collision avoidance subsystem, Collision

avoidance sensor is adopted to measure the distance with

respect to the previous car.

For rear-end collision avoidance subsystem, the currently

available collision avoidance sensors for vehicles are

adopted for approaching cars with relatively low speed.

power train management system

antilock braking system (ABS)

acceleration skid control (ASC) system, etc,

the functionality and wiring of these electric

control units (ECU) are getting more

complicated. Therefore, it is of great concern to

upgrade the traditional wire harness to a smart

car network.

The Controller Area Network (CAN) is a

Serial, Asynchronous, Multi-master

communication protocol for connecting

electronic control modules.

The CAN Network is a Peer to Peer Network

consisting of different nodes.

FEATURES OF CAN

Low cost

Easy to implement

peer to peer Network

powerful Error Checking

Higher Transmission Rates 1MBitps

high immunity to external noise signals

Today the CAN bus is also used as a field bus in general

automation environments

BLOCK DIAGRAM

CAN PROTOCOL

Using CAN protocol we can send data from one

node to other node. Here we are having two nodes .

Each node contains

AT mega32 (AVR Controller)

MCP2515 (CAN Controller)

MCP2551 (CAN Transceiver)

CAN PROTOCOL In first node we are interfacing Collision avoidance

sensor to find the object.

Second node contains DC motor

If any object is found in front of Collision avoidance

sensor in node1, DC motor in node2 stops running by

using CAN protocol.

For this two different application programs in AVR

studio are to be developed.

An Embedded system is defined as, the

software code to interact directly with that

particular hardware what we built for a

particular/specific application.

Software is used for providing features and

flexibility, Hardware

(Processors, ASICs, Memory) is used for

Performance & sometimes security.

Based on functionality and performance

embedded systems categorized as 4 types:

1. Stand alone embedded systems

2. Real time embedded systems

3. Networked information appliances

4. Mobile devices

REQUIREMENTSHARDWARE

REQUIREMENTSSOFTWARE REQUIREMENTS

Ø PROGRAMMING IN EMBEDDED C

CODEVISION AVR C COMPILER

KEIL SOFTWARE

AVR CONTROLLER

The ATmega32 is a low-power CMOS 8-bit

microcontroller based on the AVR enhanced RISC

architecture. Its features are:

High-performance, Low-power AVR 8-bit

Microcontroller

Advanced RISC Architecture

131 Powerful Instructions – Most Single-clock Cycle

Execution

32 x 8 General Purpose Working Registers

High Endurance Non-volatile Memory segments

On-chip Analog Comparator

Power-on Reset and Programmable Brown-out Detection

Internal Calibrated RC Oscillator

Six Sleep Modes: Idle, ADC Noise Reduction, Power-save,

Power-down, Standby and Extended Standby

SPEED GRADES:

0 - 8 MHz for ATmega32L

0 - 16 MHz for ATmega32

PIN DESCRIPTION OF AVR

Port A (PA7-PA0) :Port A serves as the analog inputs to the A/D Converter.

Port B (PB7-PB0): Port B is an 8-bit bi-directional I/O port with internal pull-up resistors (selected for each bit).

Port C (PC7-PC0): Port C is an 8-bit bi-directional I/O port with internal pull-up resistors.

XTAL1: Input to the inverting Oscillator amplifier and input to the internal clock operating circuit.

XTAL2: Output from the inverting Oscillator amplifier.

MCP2515 MCP2515 is a stand-alone Controller Area Network (CAN)

controller that implements the CAN specification, version 2.0B.

MCP2515 has two acceptance masks and six acceptance filters that are used to filter out unwanted messages, thereby reducing the host MCUs overhead.

FEATURES:

Implements CAN V2.0B at 1 Mb/s

Receive buffers, masks and filters

Data byte filtering on the first two data bytes

Three transmit buffers with prioritization

and abort features.

High-speed SPI Interface (10 MHz)

MCP2551The MCP2551 is a high-speed CAN, fault-tolerant

device that serves as the interface between a CAN

protocol controller and the physical bus.

FEATURES OF MCP2551

Protection against damage due to short-circuit

conditions (positive or negative battery voltage)

Protection against high-voltage transients

Automatic thermal shutdown protection

Up to 112 nodes can be connected

High noise immunity due to differential bus

Implementation

Liquid crystal displays (LCDs)

have materials which combine

the properties of both liquids

and crystals.

They have a temperature range within which the molecules are almost as mobile as they would be in a liquid, but are grouped together in an ordered form similar to a crystal.

Since the LCD’s consume less power, they are compatible with low power electronic circuits and can be powered for long durations.

The sensor is based on the principle

of Infrared Reflection. It makes use of

Infrared rays modulated at 38 kHz and

then receiving the reflected rays.

When there’s an Obstacle in front of the

module, the IR rays are reflected back and

fall on the receiver making its output LOW,

which is otherwise HIGH.

COLLISION AVOIDANCE SENSOR

POWER SUPPLY COMPONENTS

CAPACITORS (FILTER)

REGULATOR

BRIDGE RECTIFIER

TRANSFORMER

RESET BUTTONS

THANK Q