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Senior Design Project – Fall 2007. Wireless Surveillance Vehicle Lance P. Riegert Rodrigo A. Urra Steve C. Wilson. Agenda. Project Description and Requirements System Overview User Interface System Hardware ALIX.1C Microcontroller HCS12 Microcontroller DC Motor Drive Speed Detection

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senior design project fall 2007
Senior Design Project – Fall 2007

Wireless Surveillance Vehicle

Lance P. Riegert

Rodrigo A. Urra

Steve C. Wilson

Wireless Surveillance Vehicle

agenda
Agenda
  • Project Description and Requirements
  • System Overview
  • User Interface
  • System Hardware
    • ALIX.1C Microcontroller
    • HCS12 Microcontroller
    • DC Motor Drive
    • Speed Detection
    • Power
  • System Integration
  • Testing Strategies
  • Cost
  • Questions

Wireless Surveillance Vehicle

project description requirements
Project Description & Requirements
  • Surveillance Vehicle
  • Controlled over the Internet
  • Detect & control speeds: 2 forward, 1 reverse
  • Turn left & right
  • Rotate mounted camera & transmit feed to client
  • 8-hour battery lifespan
  • Power-saving mechanisms

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system overview
System Overview

Wireless Surveillance Vehicle

user interface offline
User Interface – offline

Wireless Surveillance Vehicle

user interface online
User Interface – online

Wireless Surveillance Vehicle

system components
System Components

Wireless Surveillance Vehicle

system specifications
System Specifications

Wireless Surveillance Vehicle

alix 1c microcontroller
ALIX.1C Microcontroller
  • Power
    • 12V DC Battery
  • Interfaces
    • miniPCI Wireless 802.11 Card
    • USB Logitech QuickCam
    • CompactFlash Card (OS & Software)
    • Serial to HCS12
  • Software Responsibilities
    • Wireless Interface
    • Camera Interface
    • Transmit Camera Video
    • Pass Commands to HCS12

Wireless Surveillance Vehicle

hcs12 microcontroller
HCS12 Microcontroller
  • Power
    • 9.2 V Battery Pack
  • Interfaces
    • PA0, PA1, PWM0 to H-Bridge for Drive Motor
    • PA2, PA3 to H-Bridge for Steering Motor
    • PWM1 to Servo for Camera Angle
    • Serial Port to ALIX.1C
    • Slotted Optical Switch to Timer5 Port
  • Software Requirements
    • Drive Vehicle Forward, Reverse, Left & Right
    • Detect and Adjust Speed
    • Control Camera Angle

Wireless Surveillance Vehicle

dc motor drive
DC Motor Drive

Wireless Surveillance Vehicle

speed detection
Speed Detection

Wireless Surveillance Vehicle

speed detection13
Speed Detection

Flowchart for Interrupt Handler

Flowchart for Background Job

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power
Power

Wireless Surveillance Vehicle

system integration
System Integration

Wireless Surveillance Vehicle

command video transmission
Command & Video Transmission

FTP (video/screenshots)

TCP (commands)

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testing strategies
Testing Strategies
  • 1. Hardware
    • ALIX.1C   HCS12 serial interface
    • ALIX.1C 802.11 Internet connection
    • ALIX.1C webcam recognition
    • HCS12 output voltages
    • Vehicle control (Steering, Speed)
  • 2. Software
    • Client   server command transmission
    • Client   Spook video transmission
    • HCS12 response to serial stimulus
  • 3. Incremental System Integration

Wireless Surveillance Vehicle

cost estimates
Cost Estimates

Wireless Surveillance Vehicle

possible difficulties
Possible Difficulties
  • Obtaining stable video frame rates
  • Vehicle recovery if outside of wi-fi radius
  • Keeping aligned steering
  • Maintaining stable speed control
  • Implementation of power-saving features

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questions
Questions

Questions?

Wireless Surveillance Vehicle