VIEWS: 30 PAGES: 23 POSTED ON: 10/1/2012
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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