Review 0 Intelligent Speed Adaptation in vehicles Date

Review - 0 Intelligent Speed Adaptation in vehicles Date: 01/08/09 Tamil Eniyan. M 08 MEA 026 M. Tech-Automotive Electronics

Contents • Introduction – Existing speed adaptation techniques – Need • System Overview – Block diagram – Steps • Time plan • Software tools • Hardware modules • Conclusion

Introduction • 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 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 100 kmph • 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.

Existing speed adaptation techniques • 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

Need 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 Diagram 4 lat=12. 970649 lon=79. 159310 Speed controller 3 GPS Receiver My position? RF Tx TOLLGATE 1 RF Receiver 2 Controller Display & Alert Memory

Step 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 2 GPS receiver requests its position data to satellite.

Step 3 GPS receiver receives its position data from satellite. lat=12. 970649 long=79. 159310

0001|76. 11004|12. 19256 A sample data from received data. Step 4 The current position is compared with the data of table received. =? lat=12. 970649 long=79. 159310 Current Position YES Check for the corresponding sign & speed limit When the current position reaches the position of data, corresponding alert is done. Alert the driver / Limit speed From GPS

Time plan August September October November December Literature survey Selection of components/ Study about components selected (microcontroller, GPS, Speed control) Basic hardware design Full Hardware Implementation (Speed Zone Detection & Alert) January February Programming March April Project Completion Stage II development (speed control implementation) Report Preparation

Software Tools • Microcontroller Programming tools – Keil IDE – MPLAB IDE • Flashing tool

Hardware 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 you