Intelligent Speed Intelligent Speed Adaptation in vehiclesAdaptation in vehicles

Date: 01/08/09Date: 01/08/09

Tamil Eniyan. MTamil Eniyan. M08MEA02608MEA026

M.Tech-Automotive ElectronicsM.Tech-Automotive Electronics

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ContentsContents• Introduction

– Existing speed adaptation techniques

– Need

• System Overview

– Block diagram

– Steps

• Time plan

• Software tools

• Hardware modules

• Conclusion

IntroductionIntroduction

• The Intelligent Speed Adaptation is done in vehicle using

GPS technology by tracking the location of the vehicle

• This system does not require a preloaded map or route

for its operation

• This system is a low cost and effective system which

requires less memory and simple algorithm.

Existing speed adaptation techniquesExisting speed adaptation techniques

• RF id based systems– This system uses RF id tags on the sign boards, the receiver

module in the vehicle receives the signal at various speed zones through these RF tags.

• This systems can be employed only for slow vehicles. Practically it cannot be employed in the highway for vehicles with high speed like 100kmph

• Optical recognition systems– This is done by camera based detection, the camera records

continuously, when a sign boar is approached, the sign is recognized by image processing techniques.

• This system uses complex algorithm

• Uses much resources

• Some critical cases when the sign board is covered by tree branches, the system does not detect the sign board.

• GPS based systems– The GPS receiver module tracks its position and using the pre

loaded map and speed zone database, the speed adaptation is done

• Requires a large memory to store the complete map and speed zone databases.

• Emergency sign boards like “MEN AT WORK”, “TAKE DIVERSION” etc. are not fed to the receiver dynamically.

• Dead reckoning– Using sensors, it can plot the path taken by the vehicle. By

overlaying this path onto a digital map, the DR system knows approximately where the vehicle is, what the local speed limit etc.

• This system is much complicated with multiple sensors and possibility of deviation from actual data is high

Existing speed adaptation techniques

Need for a new systemNeed for a new system

• To over come the limitations of the other Speed adaptation systems.

• To reduce the memory requirement of conventional GPS speed adaptation techniques.

• To reduce the system cost and enhance the system performance to provide dynamic update of information.

Block DiagramBlock Diagram

GPS Receiver

RF Receiver

ControllerMemory

Display& Alert

Speed controller

RFTx

My position?

lat=12.970649lon=79.159310

1

2

3

4

TOLLGATE

Step 1Step 1

Transmitter sends a data to the vehicle.

The data is a table of information of latitude and longitude and its corresponding road sign, speed limit..

Step 2Step 2

GPS receiver requests its position data to satellite.

Step 3Step 3

GPS receiver receives its position data from satellite. lat=12.970649

long=79.159310

0001|76.11004|12.19256lat=12.970649

long=79.159310

Current Position

From GPS

A sample data from received data.

YESStep 4Step 4

The current position is compared with the data of table received.

When the current position reaches the position of data, corresponding alert is done.

Check for the corresponding

sign & speed limit

Alert the driver /Limit speed

=?

Time planTime plan

August Literature survey

September Selection of components/

Study about components selected(microcontroller, GPS, Speed control)October

November Basic hardware design

December Full Hardware Implementation (Speed Zone Detection & Alert)

January Programming

February Stage II development(speed control implementation)

March Project Completion

April Report Preparation

Software ToolsSoftware Tools

• Microcontroller Programming tools– Keil IDE – MPLAB IDE

• Flashing tool

Hardware modulesHardware modules

• GPS Receiver

• Microcontrollers

• Wireless Transmitter / Receiver

• Computer Interface

• Display unit

• Speed Control Module

Reference

• N. Agerholm,R, Waagepetersen,N. Tradisauskas,and H. Lahrmann 2008 - IEEE Intelligent Vehicles Symposium “Intelligent Speed Adaptation in Company Vehicles”

• Riaz Sayed, Pierre Delaigue, Jeremy Blum, Ali Mortazavi and

Azim Eskandarian 2007-01-1321 SAE TECHNICAL PAPER SERIES“Development of an Intelligent Multimode Speed Adaptation System”

• European Road Safety Observatory

“Intelligent Speed Adaptation (ISA)” http://www.erso.eu/knowledge/content/04_esave/

• University of Leeds and MIRA Ltd.

“Intelligent Speed Adaptation Literature Review and scoping study”- January 2006 http://www.tfl.gov.uk/assets/

Thank youThank you