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APS Innovation. Fall 2007 Proposal. Team Breakdown:. Paul Brennan Sean Daugherty Adam Hughes Advisors: Dr. Vemuru, Dr. Khorbotly. Overview. Problem Definition Constraints Research and Information Gathered Design Alternative Design Project Timeline Estimated Budget Conclusion.

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aps innovation

APS Innovation

Fall 2007 Proposal

team breakdown
Team Breakdown:
  • Paul Brennan
  • Sean Daugherty
  • Adam Hughes
  • Advisors: Dr. Vemuru, Dr. Khorbotly
overview
Overview
  • Problem Definition
  • Constraints
  • Research and Information Gathered
  • Design
  • Alternative Design
  • Project Timeline
  • Estimated Budget
  • Conclusion
problem identification
Problem Identification
  • Submitted by American Electric Power (AEP)
  • Wireless Personnel Tracker/Communication System
    • Network controlled from central location
      • Monitors end device locations
      • Transmit text based messages to devices
      • Receive messages from devices
      • Responds to “panic” signal
    • RF Transceivers
      • Networked to overcome environmental limitations
      • Relays data between control and devices
problem identification1
Problem Identification
  • Wireless Personnel Tracker/Communication System
    • End Device
      • Transmits its location in network
      • Receives text based messages from control
      • Transmits reply messages
      • Visual text output
      • Text input
constraints
Constraints
  • Economics
    • Primary cost tied to engineering hours
      • $30 dollars per hour engineering cost
    • Efficient network coverage
      • Enough relays to provide strong signal throughout entire complex without needless redundancy
    • Consider final manufacturing costs
      • Concept worthless if its not marketable
constraints1
Constraints
  • Environment
    • Ecological
      • Low power consumption
        • Reduces battery waste
      • Robust parts
        • Reduce waste from broken components
      • Radiation
        • Minimize radiation from wireless signals for employee health
    • Operational
      • Electromagnetic noise from AEP generators
constraints2
Constraints
  • Sustainability
    • Durability
      • End devices are likely to be dropped and must be capable of absorbing impact
    • Network Maintenance
      • Mesh networks designed to work around node failures, but an administrator will be needed
constraints3
Constraints
  • Manufacturing
    • Limited consideration, design is proof of concept
  • Ethics
    • Privacy
      • Employees carrying devices will be constantly monitored
  • Health and Safety
    • Radiation
      • Health Concerns
      • Interference with other critical devices
constraints4
Constraints
  • Social
    • No practical social constraints
  • Political
    • Operates within public technology frequency
      • No FCC regulations to consider
research and information
Research and Information
  • Zigbee
    • Well defined protocols
      • Ensures cross platform interoperability
    • Mesh Networking
      • AODV routing dynamically maintains paths
    • Low power
      • Years of operation on a pack of AA batteries
    • Range
      • Max range of over 60 ft
researched information
Researched Information
  • Bluetooth
    • Low power
      • 25 to 37 mA current consumption
    • Pico Net
      • Allows for interaction among all networked devices
      • Limit to 10 devices per pico net
      • No cross network communication
    • Limited Range
      • Max range of approximately 30 ft
research and information1
Research and Information
  • WiFi
    • Impressive Range
      • Residential range of 125 to 200 ft
      • Outdoor range of between 750 to 1000ft
    • High Transmission Rate
      • 11 Mbps or 54 Mbps
    • High Power
      • Standby current consumption of 15 mA
      • Max current consumption of 297 mA
design1
Design
  • End devices
    • Power source
      • Single pack of AA batteries
    • Display
      • Low power segmented display screen
    • Input
      • Full alpha-numeric keypad
      • Serial communication capable
design2
Design
  • End devices
    • Microcontroller
      • TI CC2431 F64
        • 12 bit ADC
        • 64 Kb programmable flash memory
        • Serial communications port
        • Zigbee compliant RF transceiver
        • Locater system block
          • Supports tracker implementation through hardware
design3
Design
  • RF transceiver
    • TI CC2431 ZDK model
    • Zigbee compliant
    • Supports mesh transmission
  • Control Center
    • GUI Application
      • Application will run at top layer of the network from a PC
      • Interfaced to the microcontroller
      • Interface for generating and reading messages
      • Checks flag bit of each packet for indication of panic button
alternate design option
Alternate Design Option
  • Cheaper microcontroller
    • $2.53 cheaper average per unit price from TI
  • Cheaper development kit
    • Approximately $500 dollars cheaper
  • TI CC2430 F32
    • Half the flash memory
    • Locator system block not included on chip
alternate design option1
Alternate Design Option
  • TI CC2430 F32 continued
    • Limited programmable flash increases the cost of memory
    • Missing system block requires extra programming effort to gain similar functionality
      • Increases the value of memory further
      • Money saved on parts may be overwhelmed by the cost in extra engineering hours
estimated budget
Estimated Budget
  • Engineering hours account for nearly the entire cost of the project
    • 25 Summer research hours
    • 250 estimated implementation/testing hours
  • Parts, materials, and development kits make up a small portion of the overall cost
    • Motivating factor in the decision to reduce hours and take advantage of pre-existing technology with the CC2431 F64
estimated budget1
Estimated Budget
  • Engineering Hours
estimated budget2
Estimated Budget
  • Parts and materials
conclusion
Conclusion
  • Deliverables
    • Central control
      • Monitors end device locations
      • Transmit text based messages to devices
      • Receive messages from devices
      • Responds to “panic” signal
    • End devices
      • Transmits its location in network
      • Receives text based messages from control
      • Transmits reply messages
      • Generates panic signal
conclusion1
Conclusion
  • Estimated cost
    • $22,750
  • Delivery Date
    • Proof of concept on March 14, 2008
questions
Questions
  • Thank you for your time and feedback
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