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Scissors Lift - PowerPoint by ErmuLzb

VIEWS: 30 PAGES: 23

									Computer Input
   Device
              Clients:
           Richard Kunz
         Mary Sesto, Ph.D
             Advisor:
        John Webster, Ph.D
         Team Members:
    Steve Welch – Team Leader
  Andrew Bertram – Communicator
        Joe Decker – BSAC
        Matt Parlato - BWIG
Outline
   Background
   Problem Statement
   Current and Previous Design
   PDS Summary
   Design Alternatives
       Arm Support
       Pointer
       Clicker
   Future Work
   Questions
Background
   Muscular Dystrophy
       Weakens muscles
       Progressive loss of muscle tissue
       Condition slowly worsens with time
       No cure
Client
   Our client, Richard,
    has muscular
    dystrophy
       Limited motion
           Cannot get out of bed
           Slight movement in
            hands and head
       Uses his computer
           Connects him to the
            outside world
           Spends majority of his
            time on his computer
Problem Statement
   Computer input device that is easy to use and set up
   Cannot use a traditional keyboard or mouse
   Current design time consuming to set up
       Takes about half an hour to get Richard settled
       Constant adjustments needed
           Bumping table
           Components slipping
Current Design
   Regular mouse with
    large trackball
   Eraser end of pencil to
    move trackball around
   Clicks with other hand
       Foam attached to
        mouse buttons
   Arms propped up with
    stacked towels
Previous Design
                     Separate
                      components
                     Joystick with
                      extended arm
                     Mouse to click
                     PVC Pipe with soft
                      foam arm support
PDS Summary
   Comfortable for
    Richard
       Soft material
   Easy to set up
       Separate components
   More efficient than
    current design
   Reliable
   $200 Budget
Scissors Lift
       Latticework support
        system
       Pros:
         Adjustable height
       Cons:
         Complicated to build
         Lacks ability to pivot
         Many pieces
Dual Adjustment
                     Adjusts up and down
                      on both sides
                     Pros:
                       Very adjustable
                       Simple design
                     Cons:
                       May tip easily
                       Extra pipe unnecessary
Adjustable Ramp
   Similar to dual pipe but
    lacks pipe on one side
   Pros:
     Easy to build
     Few parts
     Adequate adjustment
   Cons:
     May tip easily
Design Matrix: Arm Support

             Ease of                        Ease of
                     Durability   Safety              Cost
Design        Use      (20)
                                           Assembly          Total
                                   (20)      (20)     (10)
              (30)

 Ramp          30        15        20        15        5      85

Scissors
               15        10        10        15        5      55
  Lift

   Dual
Adjustment     25        15        20        10        5      75
Graphics Tablet

                              Pros:
                                Ease of setup
                                Similar to
                                 client’s current setup
                              Cons:
                                Cost
                                Initial setup might be
                                 quite complicated


    Source: www.dell.com
Joystick
   This was the prototype
    developed by last
    semester’s team
   Pros:
     Requires very little wrist
      and arm movement
     Inexpensive
   Cons:
     Different from client’s
      current setup
     Difficult to position
      client’s arms and            “Computer Input Device for Individual
      device correctly                 with Muscular Dystrophy”
Reverse Optical Mouse

                   Upside down optical
                    mouse with moveable
                    pad
                   Pros:
                     Inexpensive
                     High sensitivity
                   Cons:
                     Set up required
Design Matrix: Pointer
           Ease of                          Ease of
                     Durability   Safety              Cost
Design      Use        (20)
                                           Assembly          Total
                                   (20)      (20)     (10)
            (30)


Tablet       5          20         20        20        0      65


Joystick     10         15         20        15       10      70


Reverse
Optical      30         15         20        15        5      85
Mouse
Speech Recognition
Software that uses
spoken prompts for
clicking
Pros:
     Simple to set up and to
      use
     Cost effective
Cons:
     Extensive programming     Source: www.provu.co.uk
     Sensitivity
Finger Guide
   Outfitting an existing
    mouse with guides so
    client’s fingers don’t slip
    off the buttons
   Pros:
     Eliminates slippage from
      the keys
     Cuts down on set up time
   Cons:
     Potentially harmful to
      client
     Possible interference with
      existing setup
Squeeze Stick
                   Rewiring a mouse so
                    the buttons can be
                    squeezed rather than
                    pressed
                   Pros:
                     Makes best use of the
                      clients range of motion
                     Can be integrated into
                      other designs
                   Cons:
                     Difficult to design
                     Potentially expensive
Design Matrix: Clicker
          Ease of                          Ease of
                    Durability   Safety              Cost
Design     Use        (20)
                                          Assembly          Total
                                  (20)      (20)     (10)
           (30)


 Voice      15         15         20        10       10      70

Squeeze
            30         15         20        20        5      90
  Pen


Finger
            25         15         15        15        5      75
Guide
Future Work
   More testing with client
   Finalize clicking device design
   Build prototypes
   Test prototypes
References
Mi, Takami, Kim, and Werbeckes. “Computer
  Input Device for Individual with Muscular
  Dystrophy.”
Pictures: www.dell.com
          www.provu.co.uk
Questions?

								
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