challa veena madhuri_adaptive cruise control
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Veena Madhuri ChallaChemnitz University of TechnologyAutomotive Software EngineeringThird Semester
Adaptive Cruise Control
Seminar Automotive Sensors
Chair for Measurement and Sensor TechnologyUniv.-Prof. Dr.-Ing. O. Kanoun
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• Introduction
• Principle and Operation
• Block diagram
• Sensors
• Advantages
• Conclusion
• References
Seminar Automotive Sensors
Chair for Measurement and Sensor TechnologyUniv.-Prof. Dr.-Ing. O. Kanoun
Adaptive Cruise Control
CONTENTS
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INTRODUCTION
Adaptive cruise control that can automatically adjust a car‘s speed
and to maintain a safe following distance.
Seminar Automotive Sensors
Chair for Measurement and Sensor TechnologyUniv.-Prof. Dr.-Ing. O. Kanoun
Adaptive Cruise Control
4
PRINCIPLE AND OPERATION OF ACC• Works by detecting the distance and Speed of vehicles ahead by radar sensor.
• Time taken to transmit and receive is the key principle for distance measurement.
• Speed can measured by frequency of the reflected beam by doppler effectWorks.
Seminar Automotive Sensors
Chair for Measurement and Sensor TechnologyUniv.-Prof. Dr.-Ing. O. Kanoun
Adaptive Cruise Control
5
BLOCK DIAGRAM OF ACC
Seminar Automotive Sensors
Chair for Measurement and Sensor TechnologyUniv.-Prof. Dr.-Ing. O. Kanoun
Adaptive Cruise Control
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Seminar Automotive Sensors
Chair for Measurement and Sensor TechnologyUniv.-Prof. Dr.-Ing. O. Kanoun
SENSORS USED IN ACC• RADAR
• LASER
• Vision Based Sensor
Adaptive Cruise Control
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INTRODUCTION OF RADAR
Seminar Automotive Sensors
Chair for Measurement and Sensor TechnologyUniv.-Prof. Dr.-Ing. O. Kanoun
•Radio Detection and Ranging.
•Waves are generated, transmitted, reflected and detected.
•Unimpaired by night, fog, clouds and smoke.
Adaptive Cruise Control
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PRINCIPLE OF OPERATION
Seminar Automotive Sensors
Chair for Measurement and Sensor TechnologyUniv.-Prof. Dr.-Ing. O. Kanoun
Transmitter
Receiver
AntennaTarget
Transmitted Wave
Reflected Wave
Adaptive Cruise Control
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PRINCIPLE OF MEASUREMENT
Seminar Automotive Sensors
Chair for Measurement and Sensor TechnologyUniv.-Prof. Dr.-Ing. O. Kanoun
1. Distance Determination
R = c Tr /2
where,
R is range of the target,C is velocity of light,Tr is round trip time.
Adaptive Cruise Control
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Adaptive Cruise Control
Seminar Automotive Sensors
Chair for Measurement and Sensor TechnologyUniv.-Prof. Dr.-Ing. O. Kanoun
2. Pulse Repetition Frequency
PRT = 1/PRF
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Seminar Automotive Sensors
Chair for Measurement and Sensor TechnologyUniv.-Prof. Dr.-Ing. O. Kanoun
3. Maximum unambiguous range
Adaptive Cruise Control
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Seminar Automotive Sensors
Chair for Measurement and Sensor TechnologyUniv.-Prof. Dr.-Ing. O. Kanoun
4. Doppler Shift
•Speed measurement
Adaptive Cruise Control
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Adaptive Cruise Control
Seminar Automotive Sensors
Chair for Measurement and Sensor TechnologyUniv.-Prof. Dr.-Ing. O. Kanoun
Received Power
Transmitted PowerTransmitter Gain Antenna Aperture
Target Cross Section
Propagation Factor
Target Distance
5. Radar Equation
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Basic Radar Types
Seminar Automotive Sensors
Chair for Measurement and Sensor TechnologyUniv.-Prof. Dr.-Ing. O. Kanoun
•Pulse Modulation
•Continuous wave
Adaptive Cruise Control
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Seminar Automotive Sensors
Chair for Measurement and Sensor TechnologyUniv.-Prof. Dr.-Ing. O. Kanoun
PULSE VS CONTINUOUS WAVE RADAR
Pulse RADAR Continuous wave RADAR
Adaptive Cruise Control
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Seminar Automotive Sensors
Chair for Measurement and Sensor TechnologyUniv.-Prof. Dr.-Ing. O. Kanoun
BLOCK DIAGRAM OF PULSE RADAR
Adaptive Cruise Control
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ADVANTAGES OF ACC
Seminar Automotive Sensors
Chair for Measurement and Sensor TechnologyUniv.-Prof. Dr.-Ing. O. Kanoun
• Fuel Efficiency of the vehicle is increased.
• Its very useful for long driving.
• It prevents accidents.
• Wide range of environmental conditions (dirt, fog, rain, ice, darkness).
Adaptive Cruise Control
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CONCLUSION
• ACC system was developed for the purposes of driving safety and comfort.
• It reduces the number of brake and switch operations that are required to the driver.
• As a result, the system reduces the driving burden so that the driver can drive in comfort.
Seminar Automotive Sensors
Chair for Measurement and Sensor TechnologyUniv.-Prof. Dr.-Ing. O. Kanoun
Adaptive Cruise Control
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REFERENCES•INTRODUCTION TO RADAR SYSTEMS Second Edition by Merrill I.
Skolnik,1981
•Radar Systems by PAUL A . LYNN
•http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=6153935
• http://www.engineersgarage.com/articles/what-is-radar-technology?
page=2
•http://www.radartutorial.eu/01.basics/rb01.en.html
•http://users.ece.gatech.edu/mrichard/Ch1_FRSP2e.pdf
•http://www.delphi.com/manufacturers/auto/safety/active/adaptive-cruise-
controlSeminar Automotive Sensors
Chair for Measurement and Sensor TechnologyUniv.-Prof. Dr.-Ing. O. Kanoun
Adaptive Cruise Control
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THANK YOU
Seminar Automotive Sensors
Chair for Measurement and Sensor TechnologyUniv.-Prof. Dr.-Ing. O. Kanoun
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