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Traffic Light Dashboard DisplayECE 411 Practicum Project
Joe Davis (EE: Analog)
Russell Ellis (EE: Analog)
JJ Hartley (CE: Computer HW)
David Dang (EE: Analog)
Problem Or Need Traffic lights can frequently be difficult to see
In front of the sun.
Blocked by large vehicles.
Lights behind sharp turns.
Motivation According to NHTSA in 2008*
~800k intersection related traffic accidents
Majority (>50%) of these accidents attributed to traffic light recognition errors
>7400 were fatal
Increase Traffic Safety
Save Lives!
* NHTSA. (2010). “Crash factors in Intersection-Related Crashes: An On-Scene Perspective”. DOTHS 811 366. Washington, DC: National Highway Traffic Safety Administration.
Objective Create a dashboard mounted device that displays relevant traffic light
information. Current light state
Amount of time left for relevant light state
Proof of concept design, not a complete solution!
Requirements Should display accurately and be simple to understand
Low Cost/Power Consumption
Durable/Reliable
Safe, easy to use
Should be able to fit and operate in a vehicle
Software should be easy/readily available.
Alternatives Google utilizes a related design in its driverless car.*
Still susceptible to line of sight
Requires extensive optical algorithms
NHTSA is researching options
* Crider, Michael (2012-05-09). Back To Basics: How Google’s Driverless Car Stays On The Road.Slashgear.
Approach Universal Design
Develop a transmitting board that simulates traffic light
Develop receiving board that displays traffic light information sent from transmitting board
Development Tools PCB123
Atmel Studio 6.0 environment
Hardware Design
Hardware Design
Hardware Design
Bill Of Materials
Software Designmain:setup ports and USARTloop1:
read and store DIP Switchesset changedDIP = 0store testMode, dash, and streetSelect values
loop2:if testMode
examine DIP Switch values stored, execute test numberelse if dash
read from USARTif byte matches streetSelect
display info recievedelse //this is streetlight
run FSM logictransmit state over USART
if DIP Switches changedgoto loop1
elsegoto loop2
Software Design Software Design
Software Design
Software Design
Software Design
Software Design
Software Design
IP and Prior Work Utilized open source code from datasheets
Testing Correct function of individual components
Correct S/W implementation
S/W & H/W test cases
Correct functioning of communications between transmitter/receiver
Power consumption testing
Testing Modes
Hardware Design
Results/Demonstration Everything works!
Contributions Joe Davis – Schematic/Layout, SW/HW debug
JJ Hartley – Software design, Layout, SW/HW debug
David Dang – Testing/documentation, SW/HW debug
Russell Ellis – Decoder prototyping, SW/HW debug
Lessons Learned PCB Layout design
Wireless is hard
Order surplus parts
AVR programming JTAG fuses
Q&A
Back-up
Patent
