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Active Parking Management

Active Parking Management. Wynn Aung  Conley Brodziak  Bryan Blakeslee  Andrew Eggers  Tyler Ludwig. Team Members. Tyler Ludwig – ME, Project Manager Conley Brodziak – ME, Asst. Project Manager Bryan Blakeslee – EE, CE Andrew Eggers – CE Wynn Aung – EE

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Active Parking Management

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  1. Active Parking Management Wynn Aung Conley Brodziak Bryan Blakeslee  Andrew Eggers  Tyler Ludwig

  2. Team Members Tyler Ludwig – ME, Project Manager Conley Brodziak – ME, Asst. Project Manager Bryan Blakeslee – EE, CE Andrew Eggers – CE Wynn Aung – EE Roles & Responsibilities Tyler – Indication Structural Design, Weatherproofing, Budget Conley – Main Housing Design, Electro-Mechanical Interfacing, Mounting Bryan – Power System and User Interfaces Andrew – Microprocessor, Sensors, Programming Wynn – Indication System and User Interfaces

  3. Introduction • Motivation • Reduce commuter search time • Reduction of carbon footprint • Future goal of campus-wide parking system • Delivery data to parking administration • Goals • Reduce time spent looking for parking • Easy identification of open lots • Accurate system

  4. Customer Needs Revisions • Removed : • Portability • Added • Vandalism (#2), Importance 9 • Visibility (#11), Importance 3 • Color (#14), Importance 9

  5. Specifications

  6. Risk Mitigation

  7. Function Decomposition

  8. System Diagram

  9. Mechanical Design: Overhead Concept • Structure Cost: $400 • Structural Integrity: Minimal bending moment. Wide stance to resist wind • System Accuracy: No blind car instances • Footprint: Spans width of entrance • 24’x10’

  10. Mechanical Design: Side Concept • Structure Cost: $200 • Structural Integrity: Large bending moment at base • System Accuracy: Snow obstructions and blind car instances • Footprint: 2’x2’

  11. Mechanical Design: Road Concept • Structure Cost: Negligible • Structural Integrity: Road Wear • System Accuracy: Excellent • Footprint: 3/16”x24’ Side View (Profile) Image credit: vehicle-counters.com/pdf/tc-ph50v2-r.pdf

  12. Mechanical Design Comparison

  13. Sensor Selection • The Federal Highway Administration • FHWA Traffic Detector Handbook: 3rd Edition • Compares many detection methods • Covers installation procedures • Factors in our sensor selection: • #1: Price must be within budget • #2: Must be low power • #3: Must not modify road surface • #4: Must operate in all conditions • #5: Must determine direction of vehicles

  14. Magnetometer Testing This test data was obtained over 15 seconds, with the magnetometer ~ 7' above a passing car Further testing needed to prove robustness over time

  15. Flux Concentration Picture credit: National Institute of Standards and Technology, Time and Frequency Division Flux concentration can be used to direct more magnetic flux through the magnetometer, increasing sensitivity High flux materials, Mu-Metals, used for this

  16. Remaining Sensor Issues Issue: Natural variation of the Earth's magnetic flux over time Potential Solution: Determine baseline by averaging data Issue: Magnetometer response can not ascertain direction Potential Solution: Offset magnetometers Issue: A very slowly moving or stopped car might be detected    
           as natural magnetic variation Potential Solution: Use difference between magnetometers

  17. Alternative Sensor Plan • Solar Powered Doppler Radar • Pro: High accuracy, low power. • Con: Cannot detect stopped vehicles. • In-road magnetometer • Pro: This would greatly increase sensor accuracy. • Con: Requires modification of asphalt. • Saw cut channel for wire, covered in sealant.   • A hole drilled in each lane

  18. Sensor Reality Check Even with a perfect sensor system, vehicles could always drive across the grass There will always be some level of possible error if a point-of-entry system is used These errors are most effectively countered by having the system accept corrective input from admin-level users

  19. System Configuration Functions • Accept new parameters • Accept lot size • Accept reset command • Set lot status Components • Numeric keypads for input • User Display • Microcontroller with SD card – Data Collection

  20. Indication System Functions Receive status Activate indicator Consists of LED light indicator (Commuters) 7-segment display (Parking Admin)

  21. Power System: Rationale • Solar • Safe, low maintenance, no moving parts, sun is fairly constant, significant up front cost • Wind • Periodic maintenance, moving parts may present safety hazard, wind is inconsistent, significant up from cost • Replaceable Battery • Significant recurring cost, requires frequent invasive maintenance

  22. Power System: Solar Panel Power Analysis • Purpose: Provide power source to charge battery • Must operate inside charge controller input range • Must supply current greater than that required by microcontroller, interface, and indication system • Mounted 10' above ground

  23. Power System: Charge Controller • Purpose: Safely regulates battery charging, prevents back-discharging through solar panel • Must output 12V for battery compatibility • Must safely regulate up to 3A of current • Maintains battery peak charge

  24. Power System: 12V Battery • Purpose: Bulk energy storage, emergency power • Must supply power overnight • Must survive multiple full discharges (deep-cycle capability) • Drives microcontroller, indication, and 5V linear regulator • Regulator provides power for digital logic devices

  25. Proposed Budget

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