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University of Moratuwa

Department of Electronics and telecommunication Engineering

FYP Presentation for ENTC student Y06 Group 17 09/08/2010

Driver Assistance System

K.M.G.D.R.T. Wijesinghe (060554E)C.M. Karunarathna (060224T)

S.C.K. Jayakody (060185X)

W.M.B. Abeyakoon (060003P)

Group 17

Supervised byEng. A.T.L.K. SamarasingheB.Sc Eng (Moratuwa), MBA (Sri J), C. Eng, MIE(SL)

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University of Moratuwa

Department of Electronics and telecommunication Engineering

Final Year Project Presentation Y06 Group 17 09/08/2010

Objective

Assists the driver

Reduce the probability of collision

Parking Assistance

Increase overall driving performance

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University of Moratuwa

Department of Electronics and telecommunication Engineering

Final Year Project Presentation Y06 Group 17 09/08/2010

Scope of the Project

Blind spots exists on both front and rear of the

vehicle. The DAS system assists the driver by acting as

a collision warning system or a parking

assistance system .

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University of Moratuwa

Department of Electronics and telecommunication Engineering

Final Year Project Presentation Y06 Group 17 009/08/2010

Features

Category : Product development

Portable

Easy to mount or remove

Use as a forward or reverse parking assistance Accurate

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University of Moratuwa

Department of Electronics and telecommunication Engineering

Final Year Project Presentation Y06 Group 17 09/08/2010

TheoryUsed pulse-echo technique

Generates a short train of pulses.

Distance information is retrieved from a time of flight

measurement.

D = t c D distance

2 t time c speed of sound

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University of Moratuwa

Department of Electronics and telecommunication Engineering

Final Year Project Presentation Y06 Group 17 09/08/2010

Conceptual System Block Diagram

Micro

Controller

Controller for power

/audio-visual warning to

the driver

Ultrasonic

Transmitter Object to

be

detectedUltrasonic

Receiver

Distance - D

Tx Wave

Rx Wave

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University of Moratuwa

Department of Electronics and telecommunication Engineering

Final Year Project Presentation Y06 Group 17 09/08/2010

Design

1. Selection and placement ultrasonic sensors at

appropriate locations of the vehicle

2. Design of a proper scheme and algorithm

3. Selection and coding of a suitable micro-controller

4. Designing the power supply

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University of Moratuwa

Department of Electronics and telecommunication Engineering

Final Year Project Presentation Y06 Group 17 09/08/2010

Hardware Ultrasonic transducer

Senscomps 9000 series transducer

-Maximum detectable range = 5m

-Natural frequency = 45KHz

-Asymmetric beam patter en= 170 350

-Maximum drive voltage = 140V p-p sine

Ideal for automotive exterior and other harsh environments

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University of Moratuwa

Department of Electronics and telecommunication Engineering

Final Year Project Presentation Y06 Group 17 09/08/2010

Hardware Cont Ultrasonic transducer

use two sensor array

Tx Rx

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University of Moratuwa

Department of Electronics and telecommunication Engineering

Final Year Project Presentation Y06 Group 17 09/08/2010

Hardware ContSelection of a suitable micro-controller

Main functions should be

- Issuing firing instructions to all transducers- Calculating the distance of the obstacle from

the vehicle

- Issuing audio and visual warnings whenever a

threatening obstacle is foundWe selected PIC18F452

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University of Moratuwa

Department of Electronics and telecommunication Engineering

Final Year Project Presentation Y06 Group 17 09/08/2010

Hardware ContDesigning the power supply

The power supply is required in the following,

- For generation of the sine wave from an dc-ac converter for

feeding the ultrasonic transducers

- For powering the micro-controller

- For echo detection and signal processing unit

- For Powering the warning units

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University of Moratuwa

Department of Electronics and telecommunication Engineering

Final Year Project Presentation Y06 Group 17 09/08/2010

System Block Diagram

Microcontroller

Automobile

Battery

Inverter

Circuits

TX

TransducersWarning

System

signal

control

detection Amplifier

RX

Transducers

Signal

detector

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University of Moratuwa

Department of Electronics and telecommunication Engineering

Final Year Project Presentation Y06 Group 17 09/08/2010

transmitter

+

-

L

C12V

M1

M4

M2

M3

140V P-P

sine wave

Rd

Inverter-amplifier-filter circuit used for exciting the transducers

Cd

L298 H-Bridge drives control by Microcontroller

H-Bridge

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University of Moratuwa

Department of Electronics and telecommunication Engineering

Final Year Project Presentation Y06 Group 17 09/08/2010

Transmitter

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University of Moratuwa

Department of Electronics and telecommunication Engineering

Final Year Project Presentation Y06 Group 17 09/08/2010

Receiver

detection AmplifierRX

Transducers

Signal

detector

Microcontroller

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University of Moratuwa

Department of Electronics and telecommunication Engineering

Final Year Project Presentation Y06 Group 17 09/08/2010

Receiver

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University of Moratuwa

Department of Electronics and telecommunication Engineering

Final Year Project Presentation Y06 Group 17 09/08/2010

Software

PIC Programming Micro C

Circuit Design ORCAD

Enclosure Design Solid Works

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University of Moratuwa

Department of Electronics and telecommunication Engineering

Final Year Project Presentation Y06 Group 17 09/08/2010

SoftwareProgram Flow Chart

Trigger transducer 1

Is echo

detect

More than

Compare with

thresholdCalculate distance

START

WARNING

SAFETrigger transducer 2

YES

YES

NO

NO

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University of Moratuwa

Department of Electronics and telecommunication Engineering

Final Year Project Presentation Y06 Group 17 09/08/2010

Laboratory test

2.81

4.335 4.325

6.355

3.29

4.47

2.66

4.99 4.975

2.32

3.375

2.2352.075

00.25

0.50.75

1

1.251.51

.7

5

22.25

2.52.75

33.25

3.53.75

44.25

4.54.75

5

5.255.5

5.756

6.256.5

6.75

80 100 120 140 160 180 200 220 240 260 280 300 320

Error

Distance (cm)

error (cm)

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University of Moratuwa

Department of Electronics and telecommunication Engineering

Final Year Project Presentation Y06 Group 17 09/08/2010

Results

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University of Moratuwa

Department of Electronics and telecommunication Engineering

Final Year Project Presentation Y06 Group 17 09/08/2010

Results

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University of Moratuwa

Department of Electronics and telecommunication Engineering

Final Year Project Presentation Y06 Group 17 09/08/2010

Future works

Modification can easily done to increase performance

Increase the no of sensors to increase accuracy with

proper algorithm

Modify as a collision warning system using better

sensor system

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University of Moratuwa

Department of Electronics and telecommunication Engineering

Final Year Project Presentation Y06 Group 17 09/08/2010

Thank You