Virtual Rumble Strip

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Virtual Rumble Strip

• Advisor Prof. Kelly
• Members Matt Auby
• Steve Leblanc
• Joachim Weyl
• Mariah Winkler

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Background and Motivation

• Single vehicle roadway departure (SVRD) crashes
  account for approximately 20 of all types of
  vehicle crashes in the U.S.
• Rumble strips along the sides of highways have
  created a warning system that has helped prevent
  SVRD accidents in the outer lanes.

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Our Proposal

• A system that will alert a driver when they have
  begun to drift out of a lane.

A Virtual Rumble Strip!
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What happens when a car drifts in between the
lanes?

• Currently, there is no system in place to warn
  people drifting between lanes on a fast highway.

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System Block Diagram
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Principles of Operation

• The system will recognize when it is on a road
  with reflective paint and assess the location of
  the car in relation to the middle of the lane.
• Safety systems will be used to warn the driver if
  the car is moving out of this area, and do so
  safely.
• Audible or visual warnings are to be given if the
  car is moving out of the lane.

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Special Restrictions

• Model built will be for demonstration purposes
  only.
• A competent driver should always be using the
  vehicle, and should not rely on the system for
  100 control.
• The device is expected to work on a dry and
  moderately clean road.

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Possible Sensors
Optek Technologies

• OPB700
• OPB700AL
• OPB700TX
• OPB701
• OPB701AL

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Reflective Paint

• Can be applied to rough and complex
• surfaces
• Clear reflective paint guaranteed to
• not change the color
• The paint does not change the road
• color so it will not be distracting to
• drivers that do not have the system

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Considered Alternatives

• Magnetometers
• Used to sense magnets buried in the road
• Expensive in Real Life (10,000 per mile)

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Considered Alternatives

• RF-ID Tags
• Transponders placed along the center lane and
  using triangulation calculations the car would
  know its position.
• Tags are easily corruptible.

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Considered Alternatives

• Image Processing
• Actual picture of surroundings
• Creates highest accuracy when applied
• Beyond scope of a one year project

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Acceptance Tests

• Tracking Line
• At this phase we will be using an oscilloscope to
  test the voltage output by our sensors to ensure
  they are working properly.
• Toggle the Virtual Rumble Strip
• Sensors should be able to sense the tracking
  strip within a short time of initiation.
• RC car Driven by Microprocessor
• The chip will need to control speed and the
  steering of the vehicle. Using variable outputs
  on the microprocessor, this should be achievable.
• Microprocessor follows Tracking Line
• For this portion, the microprocessor must be
  programmed to keep the car directly above the
  tracking line. Feedback control systems will need
  to be designed to monitor the degree of
  deviation.
• Real World Testing
• The Virtual Rumble Strip RC Car will be observed
  to be functional while driving on real concrete.

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Deliverables for April

• There are five deliverables as listed below
• One working prototype of the electronics and car
  track.
• The following manufacturing related
  documentation
• parts list
• bill of materials
• Users Manual.
• System specification, including the design
  concept, block diagram, functional description of
  the blocks, a system description, and any
  analysis done during system design.
• Schematic diagrams and circuit descriptions.

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Proposed 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.

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Questions or Comments