Department of Electrical and Computer Engineering

Advisor: Prof. KellyMembers: Matt Auby

Steve Leblanc Joachim Weyl Mariah Winkler

Virtual Rumble Strip MDR

2Matt Auby Steve Leblanc Joachim Weyl Mariah Winkler

Background and Motivation Single Vehicle Roadway Departure (SVRD)• Account for 20% of all crashes, but nearly 50%

of all fatal crashes

Rumble strips • Help prevent SVRD accidents in the outer lanes• What about the middle lanes?

No system in place to warn people drifting between lanes on a fast highway.

3Matt Auby Steve Leblanc Joachim Weyl Mariah Winkler

System Block Diagram

4Matt Auby Steve Leblanc Joachim Weyl Mariah Winkler

Approved MDR Specifications Settled on a Sensor system.• Optical vs. Microwave

Settled on a Design for the Sensor Array. • Should it be two rows of sensors or should it

be a V formation, how many sensors, etc. Show that the Sensor Array gives usable

results.• Show that the sensor array is providing the

necessary data to give suitable feedback to the driver.

5Matt Auby Steve Leblanc Joachim Weyl Mariah Winkler

Alternative Sensors Investigated Microwave Sensors• Easy measurements of distances ahead

to echo objects.• Similar system designed in 1997 called

the FSS Highway Stripe.• Beyond the Scope of a 1 yr. SDP• Keep original focus of an inexpensive

alternative

6Matt Auby Steve Leblanc Joachim Weyl Mariah Winkler

Approved MDR Specifications Settled on a Sensor system.• Optical vs. Microwave

Settled on a Design for the Sensor Array. • Should it be two rows of sensors or should

it be a V formation, how many sensors, etc.

Show that the Sensor Array gives usable results.• Show that the sensor array is providing

the necessary data to give suitable feedback to the driver.

7Matt Auby Steve Leblanc Joachim Weyl Mariah Winkler

Sensor Hardware 4 different sensors tested• Best results came from the 701AL because it

uses a Darlington configuration• The 701AL is smaller then some of the other

sensors tested 14 different colored strips tested on road

surface• All bright colors appear to reflect very well

while all dark colors appear to work poorly• This will help sense the road using the lines

already laid down

8Matt Auby Steve Leblanc Joachim Weyl Mariah Winkler

Analog Sensor with Digital Output Circuit

9Matt Auby Steve Leblanc Joachim Weyl Mariah Winkler

Operation of Neighboring Sensors

10Matt Auby Steve Leblanc Joachim Weyl Mariah Winkler

Approved MDR Specifications Settled on a Sensor system.• Optical vs. Microwave

Settled on a Design for the Sensor Array. • Should it be two rows of sensors or should

it be a V formation, how many sensors, etc.

Show that the Sensor Array gives usable results.• Show that the sensor array is providing

the necessary data to give suitable feedback to the driver.

11Matt Auby Steve Leblanc Joachim Weyl Mariah Winkler

Prototype Five Sensor Array

12Matt Auby Steve Leblanc Joachim Weyl Mariah Winkler

Paint Line Width

13Matt Auby Steve Leblanc Joachim Weyl Mariah Winkler

Car Mounted Array System Array mounted under

of the car Single line array 13 Sensors will be

mounted under the car.• 3 Middle sensors• 10 Warning sensors

14Matt Auby Steve Leblanc Joachim Weyl Mariah Winkler

Approved MDR Specifications Settled on a Sensor system.• Optical vs. Microwave

Settled on a Design for the Sensor Array. • Should it be two rows of sensors or should

it be a V formation, how many sensors, etc.

Show that the Sensor Array gives usable results.• Show that the sensor array is providing

the necessary data to give suitable feedback to the driver.

15Matt Auby Steve Leblanc Joachim Weyl Mariah Winkler

Human Factors Visual Component• First Line of Defense• Motion Enhanced Warning Signal (MEWS)

Audio Component • Second Line of Defense• A graded signal presented in Stereo• Two separate tones

16Matt Auby Steve Leblanc Joachim Weyl Mariah Winkler

Warning System Prototype Drawing of the Warning System

17Matt Auby Steve Leblanc Joachim Weyl Mariah Winkler

Behavioral Changes Lane Deviation Distribution• May compress because drivers get it know

how far they can deviate without being warned

Drowsiness• Driver may become less attentive to

his/her surroundings

18Matt Auby Steve Leblanc Joachim Weyl Mariah Winkler

Looking Ahead Sensor Array• DSP, Gain Block and Noise Filtering• Attach Prototype to RC Car

Warning System• Build the Prototype• Try to implement ways to deal with

Behavioral Changes Questions or Comments

19Matt Auby Steve Leblanc Joachim Weyl Mariah Winkler

Approved MDR Specifications Settled on a Sensor system.• Optical vs. Microwave

Settled on a Design for the Sensor Array. • Should it be two rows of sensors or should

it be a V formation, how many sensors, etc.

Show that the Sensor Array gives usable results.• Show that the sensor array is providing

the necessary data to give suitable feedback to the driver.