1st Design ReviewTuesday, January 29th, 2008

2:00-4:00PM

Team MembersCortney Ross (ME) – Project ManagerKirk Marquard (ME)Achilles Tziazas (CE)Amy Koster (ID)Rachel Lepkowski (ID)

Elizabeth DeBartolo (ME) – Project GuideDaniel Phillips (EE) – Project GuideStan Rickel (ID) – Project Consultant

Team Organizational Chart

Project OverviewOur customer, Donna, is a

mentally handicapped young adult who is in a motorized wheelchair. She has speech disabilities so she needs a special way to communicate with people who don’t know her well. She currently uses a book full of pictures that she and the staff that helps her is familiar with. Last year, a SD project designed a touch screen audio device to help her communicate with new people.

One Page Summary

Customer Needs1. Picture based2. Long Battery life3. User friendly system4. Low obstruction of vision

– size requirements5. Left hand design6. No interface with wheel

chair controls7. Female voice output8. Durable and robust –

impact testing9. Upgradeability by staff10. Adequate product size11. Adequate product weight

12. User friendly GUI13. The product system must

be fast 14. The product requires a

custom enclosure15. The product must be

colorful and girly16. Weather resistant17. Easily charged18. Easily be able to get out

of the way of a customer19. Volume adjustment

required20. Fixed to wheelchair21. Anti glare screen

Metrics/SpecificationsSpecification Number Customer Need Number Design Specification Importance Unit of Measure Marginal Value Ideal Value

1 4,10,14 Case Height 4 Inches 9" 9"

2 4,10,14 Case Width 4 Inches 13" 13"

3 4,10,14 Case Thickness 4 Inches 3" 3"

4 11 Weight 3 Lbs 10lbs 7lbs

5 4,10,14 Screen Size 2 Inches 12" 10.5"

6 12 Image Hight 3 Inches 1" 1.5"

7 12 Image Width 3 Inches 1" 1.5"

8 2 Battery Life 5 Hours 6hrs 16hrs

9 13,12 Speed of System 5 Seconds 1sec 0.1sec

10 1,12,14,15 Appearance 1 List List List

11 9,12 Upgradable 4 Yes/No Yes Yes

12 2 Number of Batteries 2 # 4 2

13 8 Widthstand Drop 5 Inches 40" 30"

14 16 Withstand Weather Elements 5 Yes/No Yes Yes

15 16 Widthstand Push Force 5 Lbs 10lbs 20lbs

16 19 Volume Range 3 dB 60dB 90dB

17 1,9 Drive Space 2 Gbytes 1Gb 5Gb

18 13 Processor Speed 5 MHz 300MHz 500MHz

19 14 Widthstand Heat of System 5 Degrees Farenhight 80º 70º

20 1 Screen Resolution 3 Pixels 800x600 1024x768

21 1,12 Picture Font Size 4 Pts 12 16

22 12,9,17 Staff use 5 Subjective Subjective Subjective

23 5,18 Range of Reach (Ergonomics) 4 Drawing Drawing Drawing

24 1,9 Meyer Johnson Symbols Archive 5 # of symbols 250 500

25 22 Anti-glaring 3 Yes/No Yes Yes

26 8,16 Safety (Electric/Heat) 5 Yes/No Yes Yes

27 2,14 Number of Battery Bays 2 # 4 2

28 1,3 Screen Contrast 3 Cd/in2    

29 3,9,12 User Manual 5 Yes/No Yes Yes

30 2,10,14 Battery Dimensions (Each) 4 Inches 4"x5" 2"x4"

31 6,14,18 Enclosure Mounting 4 Yes/No Yes  

32 4,6,18,20 Mounting removability 4 Yes/No Yes  

33 7 Voice Output 3 Male/Female Female  

Current Design: “Big Pink Box”

The “Big Pink Box”Needs Met (Pros) Needs Not Met (Cons)

1. Picture based5. Left hand design7. Female voice output12.User friendly GUI15.The product must be

colorful and girly

3. User friendly system4. Low obstruction of

vision – size requirements

9. Upgradeability by staff10.Adequate product size11.Adequate product

weight13.The product system

must be fast17.Easily charged20.Fixed to wheelchair

Overall System Pugh Diagram    Narrowed Concepts

  AB C D

  (reference)

 

Pink BoxInternal Entire System

(Mini Pink Box)

Components Above With Battery Under

Wheelchair

Components & Battery Under Wheelchair LCD

Above 

 

Selection Criteria Weight RatingWeighted

Score RatingWeighted

Score RatingWeighted

Score RatingWeighted

Score

Ease of use (staff) 90% 2 1.8 8 7.2 7 6.3 7 6.3

Battery Life 90% 5 4.5 4 3.6 8 7.2 8 7.2

Obstruction Of View 85% 1 0.85 8 6.8 9 7.65 10 8.5

Charging Dificulty 60% 1 0.6 6 3.6 5 3 5 3

Charging Time 60% 1 0.6 7 4.2 5 3 5 3

Mounting Weight 80% 1 0.8 8 6.4 9 7.2 10 8

Ease of Assembly Components 55% 5 2.75 3 1.65 6 3.3 8 4.4

Ease of Assembly System 55% 0 0 8 4.4 5 2.75 4 2.2

Removability Entire System 50% 8 4 9 4.5 5 2.5 4 2

Removability Device 90% 8 7.2 9 8.1 9 8.1 10 9

Adaptability To Wheel Chair 85% 0 0 9 7.65 7 5.95 5 4.25

Cost 70% 8 5.6 6 4.2 7 4.9 8 5.6

Enviornment Resistable 85% 5 4.25 9 7.65 9 7.65 9 7.65

Durability 90% 8 7.2 5 4.5 7 6.3 9 8.1

Adjustability Device Arm 80% 0 0 5 4 7 5.6 9 7.2

      0   0   0   0

      0   0   0   0

      0   0   0   0

      0   0   0   0

      0   0   0   0

 Total

Score 40.15 78.45 81.40 86.40

  Rank        

  Continue? No Requires Customer Input

Computer Component OptionsLN2440SBC EBC-7000

Computer Component OptionsViewsonic BitsyXB

Computer Component Options

 

A B C D E

Pink Box Viewsonic LN2440SBC EBC-7000 BitsyXb

Processor 520MHz Intel Bulverde 400 MHz Samsung S3C2440A Processor 400 MHz Samsung S3C2440A Processor 32-bit Marvell PXA270 RISC processor at 520 MHz

Operating System WinCE 5.0 Any Any Any

Memory SDRAM 128MB SDRAM 64MB SDRAM 64MB SDRAM 128MB

Audio 1-watt speaker AC97 version 2.3 compliance interface AC97, 16-bit stereo Codec

USB Yes Yes Yes Yes

CF/SD Yes Yes Yes Yes

Weight 6.4lb 1.5kgs

Dimensions 11.5" x 8.4" x 1" 3'' x 4'' 210mm x 110mm x 45mm 3'' x 5''

http://www.embedian.com/index.php?main_page=product_info&products_id=194

Computer Components Pugh    Narrowed Concepts

  AB C D E

  (reference)

 

Pink Box Viewsonic LN2440SBC EBC-7000 BitsyXb 

 

Selection Criteria Weight RatingWeighted

Score RatingWeighted

Score RatingWeighted

Score RatingWeighted

Score RatingWeighted

Score

Processor 70% 2 1.4 8 5.6 8 5.6 8 5.6 8 5.6

Low Power 90% 4 3.6 4 3.6 8 7.2 9 8.1 9 8.1

Cost 40% 8 3.2 7 2.8 9 3.6 7 2.8 1 0.4

Ease of Assembly 60% 3 1.8 5 3 3 1.8 9 5.4 5 3

Weight 50% 1 0.5 6 3 7 3.5 8 4 8 4

Dimensions 80% 1 0.8 8 6.4 8 6.4 7 5.6 7 5.6

Audio Support 95% 3 2.85 6 5.7 0 0 9 8.55 9 8.55

USB/CF/Other 70% 7 4.9 9 6.3 9 6.3 9 6.3 9 6.3

Operating System 80% 2 1.6 9 7.2 9 7.2 9 7.2 9 7.2

                       

                       

 Total

Score 20.65 43.60 41.60 53.55 48.75

  Rank          

 Continue

?            

LCD Selection12.1 Inch Open Frame Surface Acoustic Wave TouchScreen – Caltron Industries

LCD Screen SpecsModel FBT-1212OTEAS FBT-1212OTEASU

Touch Interface serial port USB port

LCD Panel

Display Panel 12.1 inch TFT LCD

Pixel Pitch 0.3075(H) x 0.3075(V) mm

Max. Resolution 800 x 600 SVGA

Contrast Ratio 500:1 (typical)

Brightness 320 cd/m2  (typical, 80% of original brightness)

Uniformity 80% (typical)

Backlight MTBF 50,000 hours (typical at 25°C)

Response Time 25 ms (typical)

Display Colors 16 million

Viewing Angle ±70°L/R, +65°U, -45°D (typical at CR=5)

Video and Power

OSD Controls Brightness, Contrast, Phase, Clock, Color, H&V position, Auto-tune, Recall

Input Signal RGB analog 0.7V peak to peak

Video Input Connector D-sub 15 pin analog

Scan Frequency 24-54kHz horizontal scan, 50-90 Hz vertical refresh

Power Supply AC/DC 12V power adapter, universal 100-240 Volts

Mechanical and Environment

Operating Temperature 0~50°C [32~122°F]

Storage Temperature -20~60°C [-4~140°F]

Humidity 85% (maximum)

Dimensions (WxHxD) 310 x 237.7 x 36.8 mm [12.2 x 9.36 x 1.45 inch]

Net Weight 1.4 Kg [3 Lb]

Power Components16hr battery lifeMany batteries connected together vs. one

batterySize requirements unknownSpecs from EBC-7000

+6V ~ 27V DC power+12V connection bypass to backlight inverter

board or other external devicesReal-time clock battery powered

Arm ConceptsSee Separate Pages

Materials Selection

Materials Selection

Materials Selection

Materials Selection

Materials Selection

Case Design IdeasTwo casesOne case to sit in front of customer

Power cord to other caseSpeakersBrightness Control

One case to be secured under wheelchairPower cord to batteryPower cord to other caseBrightness Control

Docking Station Concept

Power Cord Between CasesAudioVisual/LCDTouch screenPower

GUI Concepts

GUI Concepts

GUI Concepts

GUI Concepts

GUI Concepts