Adaptive Headlight System

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Adaptive Headlight System

• Betzayda Rivera
• Projects II Design Review
• Tuesday, 9-16-03

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Background

• Currently,
• Headlights shine directly in front of a vehicle
• The high to low beam transition is manual
• In general, the same beam shines all the time
  just at different intensities

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Project Objectives

• To ENHANCE the existing functionality
• Improve VISIBILITY
• Decrease number of night time accidents
• Increase SAFETY for drivers pedestrians

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First Feature

• Adaptive Headlights
• BMW animation

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Second Feature

• High to Low beam transition
• High gt Low with oncoming traffic or city
  environment
• Low gt High after lighted situation passes
• How? Light/Dark Sensor

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Third Enhancement

• Speed Controlled Beam Orientation
• Narrow lengthen the beam at HIGH speeds
• Widen shorten the beam at LOW speeds
• How? Secondary Reflector

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Analysis Specifications

• Vishay Spectrol
• Full 360 degree Smart Position Sensor
• Light Sensor
• Two methods under experimentation
• Darlington Light Sensor
• Cricket Light Sensor
• Four Servo Motors
• Two to control large reflective plate
• Two to control smaller outer reflector

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Analysis Specifications

• Vishay Spectrol Smart Position Sensor

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Analysis Specifications

• Darlington

• Cricket

SW1 Toggle switch R1 LDR R2 10k ohm R3
1k ohm
VR1 10k ohm BZ1 Buzzer D1 Diode
(1N4001) Transistor (TIP 121)
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Analysis Specifications

• Two Large Inner Reflective Plates
• Used to aim the headlight during turns
• Servo positioned in center weight distribution
• 45 degree total mobility
• Two Small Outer Reflective Plates
• Used to narrow or widen beam by speed
• Servo positioned in center weight distribution
• 30 degree total mobility

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Power Consumption

• Relatively Low Power Stationary System therefore
  Utilize Wall Power.

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Timeline
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Test Plan

• Test Data
• Steering wheel rotation vs headlight movement
• Light/Dark standards and cutoffs
• Vishay Spectoral Rotational Position Sensor
• Test alone
• Test with servos and HC12 for position analysis
• Test with servos and load to calibrate

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Test Plan

• Sensors
• Darlington Light sensor circuit is equip with a
  buzzer for independent testing
• Cricket Light sensor setup designed light an LED
  when active then HC12 beep during demo for audio
  indication
• Servos
• Expansion from Projects I test with load for
  available torque and repeatability

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Safety Concerns

• Purpose is to ENHANCE the safety of all!!

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Total Expected System Cost (736)