Smart Cane – P14043 Systems Design Review

1. Smart Cane – P14043Systems Design Review Lauren Bell, Jessica Davila, Jake Luckman, William McIntyre, Aaron Vogel

2. Agenda • Project Background • Customer Requirements • Engineering Requirements • Functional Decomposition • Concept Generation [Morph chart and Pugh charts] • Concept Selection • Engineering Analysis • Risk Assessment • Test Plan • Project Plan

3. Why Design a Smart Cane?

4. Ultimate Vision of Smart Cane

5. For Our Project… Our project will focus on these areas: Future projects will continue towards final Smart Cane vision…

6. Customer Requirements • Since Problem Definition Review • Emphasis on the haptic handle • Less emphasis on detection system • (Make it basic, detect lower-front objects, leave for future projects) • Future projects: • Detection System • Resembles a conventional cane • Operated like conventional cane • Improving battery life, robustness, use in other environments etc…

7. Engineering Requirements Revised, concise specs: • Cane characteristics • Moment of Inertia • Spring Constant • Handle diameter • Length

8. Concept Generation

9. Functional Decomposition

10. Morph Chart

11. Cane Structure – Pugh Chart

12. Concept Selection – Handle*

13. Attractive/Repulsive Magnetism Navigation Pros • Easier to feel direction • Better directional feedback • Can be used with gloves Cons • Possible power limitations • No indication of proximity (acting alone) Screw-in cap Battery housing Microcontroller Wire windings with ferrous cores

14. Piston Navigation Screw-in cap Pros • Easier to feel direction • Better directional feedback • Can be used with gloves Cons • Heavier • No indication of proximity (acting alone) • May inhibit index finger haptic ability Standard servo Battery Housing Push piston Drive shaft Microcontroller

15. Scroll Navigation Pros • Easier to feel direction • Better directional feedback • Can be used with gloves Cons • May inhibit index finger haptic ability Screw-in cap Battery Housing Microcontroller Continuous servo Scroll Transmission

16. Track Ball Navigation Screw-in cap Pros • Easier to feel direction • Better directional feedback • Can be used with gloves Cons • Heavier • Less compact • May inhibit index finger haptic ability Microcontroller Battery Housing Continuous servos & transmission shafts Track ball

17. Torque Handle Navigation Screw-in cap Pros • Easier to feel direction • Better directional feedback • Can be used with gloves Cons • Heavier • Moment of inertia/torque concern Transmission Standard servo Microcontroller Battery housing

18. Handle Feedback – Pugh Chart

19. Detection System – Pugh Chart

20. Engineering Analysis • Microcontroller • Power • Operating Conditions • CPU Speed • I/O Characteristics • Servo Motors • Torque • Weight • Dimensions • RPM • Tolerance/Precision • Power • Continuous/Standard • Magnets • Forces • Weight • Dimensions • Power • Batteries • Heat • Battery Life • Power • Rechargeable vs. Disposable • Size

21. Risk Assessment

22. Test Plan • User Test • Battery Test • Physical Characteristics • Detection System Test

23. Project Plan

24. Three Week Plan Systems Design Review Engineering Analysis Select Concept Subsystem Decomposition/Analysis Engineering Analysis Proof of Concept Subsystem Design Subsystem Decomposition/ Analysis Update Test Plan and Risk Assessment Sub Systems Design Review Update Test Plan and Risk Assessment

25. Questions?

27. Project Plan