Skin Color Monitor by s5kG1aU

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									Skin Color Monitor
     Client: John G. Webster, Ph.D.

   Advisor: William L. Murphy, Ph.D.




                Team Hotflash
              Jack Ho – Team Leader
               Joseph Yuen – BWIG
                Brian Ginter – BSAC
       Patrick Kurkiewicz – Communications
Outline
     Problem Statement
     Background
     Current Devices
     Design Constraints
     Design Ideas
     Design Matrix
     Circuitry
     Future Work
Problem Statement
   Detecting hot flashes
       Change in skin color
   Wearable monitoring device
       Comfort


   Used in therapeutic drug testing
Background Information
   Hot flashes
       Occur during menopause
       Are marked by feeling of intense heat and sweating
   Device
       When capillaries fill with blood, skin changes color
       Device measures differences in skin color, denoting a
        hot flash
       Device stores data for use in research and drug
        testing
Current Devices
   BIOLOG Hot Flash Monitor
       Heavy (200 g)
       Bulky (3.3 x 7 x 13 cm)
       Runs wires from electrodes to belt monitor
        device
       24 hour battery life
       Expensive
          Monitor - $2200
                                  http://www.ufiservingscience.com/HFMon1.html
          Software - $2000
Design Constraints
     Size
         < 6 cm x 6 cm x 1 cm
     Weight
         < 50 g
     Comfort & Attachment
         No sharp edges, non-irritant
     Price
         < $7 USD
     Appearance
         Small, Sleek, Smooth
Design 1 (barrier)




   Material
       Hard Plastic
   Distance from Skin
       Ideally 2mm
Pros and Cons
 Pros                  Cons
  Firm sturdy shape    Harder, more rigid
                         plastic
                        Harder to shape
    More durable
                        Still could be
                         more focused
Design 2 (cave design)




   Material
       Firm rubber (like an eraser)
   Distance from Skin
       Ideally 2mm
Pros and Cons
 Pros                    Cons
    Smooth Shape         Light could be

     (less noticeable)   more focused.
    Rubbery (more        Monitor may

     comfortable         bend/flex (causing
    Low Cost (parts     different readings
     about $5)           from PD)
Design 3 (laser)




     Material
         Hard plastic
Pros and Cons
 Pros                       Cons
    Light source and          Laser diode may
     receiver is on             be expensive
     same side                 Laser potentially
    No barrier needed          dangerous
     – all light received
     will be from skin
     reflection
Design Matrix
                          Cave   Barrier   Laser

 Comfort (0.15)           9      6         6
 Cost (0.2)               7      8         2
 Ease of construction     7      6         4
 (0.15)
 Light Detection (0.25)   7      5         6
 Safety (0.15)            9      7         5
 Durability (0.1)         7      8         6
 Total                    7.6    6.45      4.75
Circuitry
   Base circuitry
       LED’s
       Photodiodes
       Op Amps
Future Work
   Discuss with client
   Choose design
   Work on circuit model
   Begin testing
   Prototype
Questions?
References
   UFI Hot flash monitoring tools, electrodes, and accessories.
         http://www.ufiservingscience.com/HFMon1.html

								
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