Timeline for Remaining Tasks

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					   Lighting Tool Box
Machine Vision Lighting
Team Members: B. Thompson
              N. Sitarski
              B. Harris
              D. Chronicle
              V. Gergov


              Advisor: J. W. Miller

             University of Michigan-Dearborn
Introduction to Lighting Tool Box

   Lighting Tool Box system function and
    purpose
   Lighting Tool Box components
    –   LED Light Controller
    –   Incandescent Light Controller
    –   Florescent Lamp Controller
    –   Computer
Design Objectives

   The goal is to design and implement three lighting
    systems that can be remotely controlled via the
    internet or locally in a stand alone configuration.
Implementation Choices

Linux/GNU Operating System
  –   Stability
  –   Cost
  –   Scalability
  –   Open Source
PC104 Embedded System
  –   Size
  –   Heat-load
  –   No moving parts
Implementation Choices cont.

   Custom hardware for lighting controllers
    –   Off the shelf products are non-existent
    –   Flexibility to make changes
    –   Cost
High Level System Block Diagram

                                  Incandescent
              Server                             Incandescent
             (PC104)              Light System



Web Cam                              LED           Ring
                       Internet                    Light
                                  Light System




                                  Fluorescent
                                                 Fluorescent
    Client                        Light System
High Level Block Diagram
Incandescent Lighting controller

      120V AC
                  Power        Light
                  Supply




        GND     MOSFET
                               LPF
                  Driver




                PWM
                Local/Remote
Low Level Block Diagram
Power Supply

   Vin 120 V RMS
   Vout 12 Volts to 18 Volts
    Unregulated
   Rectifier Circuit has a PIV of
    36 Volts Diodes Rated at 50
    Volts
   Maximum Current of Circuit is
    20 Amps
   Capacitor was Calculated with
    I=C*(dv/dt) , C = (20 (amps)
    * 8 (ms)) / 6 (V) = 27,000 uF
   68,000 uF Electrolytic was the
    value closest to the calculated
    value
Low Level Block Diagram
Signal Conditioner

   Differential Amplifier
    measures voltage
    across lamp
   Scales voltage to level
    compatible with
    computer input
   Provides Isolation
    between lamp circuit
    and computer
Low Level Block Diagram
MOSFET Driver

   MOSFET operated in
    saturation region of
    curve
   Provides efficient
    switching to lamp load
   Low heat dissipation
High Level Block Diagram LED Light
Controller

   System        Power 12 VDC
   Health        Supply 5 VDC




    PWM             Select         MOSFET   LED Light
    Oscillator      Logic          Driver   Ring



                 Remote External
                 PWM Sync
Schematic Diagram
Power Supply
Schematic Diagram
Select Logic
Over Voltage Alarm Circuit
PWM Oscillator 40 KHz
Commercially Available Ring
Lights
Bright Field vs. Dark field

   Bright Field - Light is aimed
    directly at an object, often
    creating distinct shadows.
    Effective for high degrees of
    contrast, but can creates
    specular reflections
   Dark Field – Light is projected
    at an angle to the surface,
    causing any variations to
    deflect light up into the camera.
    Nothing is seen by the vision
    system if there are no
    aberrations on the surface.
High Level Block Diagram Fluorescent
Lighting Controller




     Server   Fluorescent   Circular
    (PC104)   Controller    Fluorescent
                            Lamp
Fluorescent Lamp Intensity
control circuit schematic
Project Changes

 Lighting controllers will have the capability of
 being controlled in stand alone configuration.
Dave And Vladi’s Completed Tasks

   Acquired all needed parts (PC104, I/O Board, 2.5” HDD, Flash,
    Web Cam, Enclosures, Misc.)
   Assembled PC104 and Modules
   Installed/Streamlined Debian GNU/Linux OS on PC104 (under
    100 MB compared with ~1.2 GB min Windows install )
   Custom Linux Kernel 2.4.23 configured and compiled with i586
    optimization, preemptive task scheduler, and low latency
    patches
   Web Cam Installed and configured with our kernel
   Web Site code completed in PHP, XHTML 1.0 Strict, and CSS
    2.0 in accordance with W3C standards
   Web Site daemon control module Coded
   Web Cam Snapshot BASH Script Coded
Dave and Vladi’s Remaining Tasks

   Digital I/O Card integration into our kernel
   Digital I/O daemon control code
   Testing of code with actual lighting systems
   Achieve system boot time of ~ 3 sec
   Miscellaneous enhancements of code and
    Operating System
Nick’s Completed Tasks

   Power Supply design, test, and construction
   MOSFET Driver Circuit design, test, and construction
   Lamp Filter design, test and construction
   Lamp Head design and construction
   Heat sinks have been sized and installed on high
    temperature components
   All components have been installed and tested in a
    commercially available electronics cabinet, unit is
    fully functional in local mode of operation
Nick’s Remaining Tasks

   Implement computer interface circuit
   Integrated test of finished product
Blaine’s Completed Tasks

   Regulated Power Supply design, test, and construction
   MOSFET Driver Circuit design, test, and construction
   Strobe circuit design, test and construction
   Remote/ Local select logic design, test, and construction
   LED Ring Light Head design and construction
   Heat sinks have been sized and installed on high temperature
    components
   Computer interface circuit
   All components have been installed and tested in a
    commercially available electronics cabinet, unit is fully
    functional in local mode of operation
Blaine’s Remaining Tasks

   Integrated system test
   Possible additional Ring Light configurations
Brandon’s Completed Tasks

   Dimmable (from 1 to 100%) 32 watt
    fluorescent lamp dimmer circuit assembled
    on board
   0-5VDC intensity control circuit
   System test with 32 watt lamp
Brandon’s Remaining Tasks

   Install components in cabinet
   Construct shadow box for transmitted lighting
    applications
   Research circuit modification requirements to
    operate a 40 watt lamp
   Integrated system test
Timeline for Remaining Tasks

   February           February        March               March             April
     1-14              15-28          1-15                16-31             1-25

Implement computer interface     Debug computer interface hardware
hardware
Develop PWM code                 Integrated System Test


                                 Refine and debug computer interface software


                                                   Prepare for demonstration


                                                                      Give
                                                                      Demonstration

                                                                      Complete Final
                                                                      Report
Feedback


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