INTRODUCTION

1. INTRO • ADJUSTABLE • MECHANICAL • STILTS INTRODUCTION PROBLEM DESIGN TESTING DESIGN REQ BUDGET CONCLUSION

2. INTRO • GROUP MEMBERS • Trent Hilliard • Ian Juurlink • Brad Poirier • Mitchell Weir • SUPERVISOR • Dr. MarekKujath INTRODUCTION PROBLEM DESIGN TESTING DESIGN REQ BUDGET CONCLUSION 2

3. INTRO • CURRENT STILTS: • Used for tasks requiring small rises in elevation • Difficult to get stilts on • Difficult to adjust • Difficult to pick up objects PROBLEM PROBLEM DESIGN TESTING DESIGN REQ BUDGET CONCLUSION

4. PROBLEM INTRO THE ORIGINAL STILTS PROBLEM DESIGN TESTING DESIGN REQ BUDGET CONCLUSION

5. INTRO PROBLEM PROBLEM DESIGN TESTING DESIGN REQ BUDGET CONCLUSION

6. LIFTING DEVICE: THE SCISSOR LIFT INTRO DESIGN PROBLEM • Fabrication • Snap rings • Bushings • Spacers • Operations • Sliders • Pivots DESIGN TESTING DESIGN REQ BUDGET CONCLUSION

7. LIFTING DEVICE: THE SCISSOR LIFT INTRO DESIGN PROBLEM • 4 lockable heights • 15 inches of extension height available • Height from ground to foot: • Min = 8” • Max = 23” DESIGN TESTING DESIGN REQ BUDGET CONCLUSION 15”

8. LOCKING MECHANISM: INTRO DESIGN PROBLEM • “LOCKED” • “UNLOCKED” DESIGN TESTING DESIGN REQ BUDGET CONCLUSION 3 • EXTENDED POSITION 1 2 • INTERMEDIATE POSITIONS 0 • CLOSED POSITION

9. GAS SPRING DAMPER: INTRO DESIGN PROBLEM • Purpose: to overcome friction loss • Damper applies continuous extending force DESIGN TESTING DESIGN REQ BUDGET CONCLUSION

10. LATERAL LEG SUPPORT: INTRO DESIGN PROBLEM DESIGN TESTING DESIGN REQ BUDGET CONCLUSION • Provides lateral stability • Ankle support • Extends with top foot plate

11. DIMENSION VERIFICATION: INTRO TESTING PROBLEM • Several design requirements based on physical dimensions and weight DESIGN TESTING DESIGN REQ BUDGET CONCLUSION

12. STRAIN GAUGE TESTING: INTRO TESTING PROBLEM DESIGN TESTING DESIGN REQ BUDGET CONCLUSION • Strain gauge installation • DAQ and VI system • Acquires voltage readings

13. STRAIN GAUGE TESTING: INTRO TESTING PROBLEM DESIGN TESTING DESIGN REQ BUDGET CONCLUSION

14. STRAIN GAUGE TESTING: INTRO TESTING PROBLEM DESIGN TESTING DESIGN REQ BUDGET CONCLUSION

15. FINAL PRODUCT VIDEO: INTRO TESTING PROBLEM DESIGN TESTING DESIGN REQ BUDGET CONCLUSION

16. Stilts can be attached in the ‘collapsed’ position. • Stilts must be able to extend 12” above the ‘collapsed’ position height. • Operator can walk on stilts while in the ‘extended’ position. • Operator must be able to extend and contract the stilts while stilts attached to operator’s feet. INTRO DESIGN REQ. PROBLEM DESIGN TESTING DESIGN REQ BUDGET CONCLUSION

17. INTRO • The weight of each stilt will not exceed 25 lbs. • The stilts will fit foot sizes up to size 12. • The stilts will be operational for a total load of 220 pounds • Stilts will have non slip surface on the bottom to simulate normal footwear traction. DESIGN REQ. PROBLEM DESIGN TESTING DESIGN REQ BUDGET CONCLUSION

18. INTRO • Base of stilt will fit in 6”x14” footprint. • Prototype stilts will have a maximum cost of $2500 DESIGN REQ. PROBLEM DESIGN TESTING DESIGN REQ BUDGET CONCLUSION

19. INTRO BUDGET PROBLEM DESIGN TESTING DESIGN REQ BUDGET CONCLUSION

20. INTRO • POSITIVE FEATURES: • Easy to obtain sitting and standing position while wearing stilts • Quicker to adjust heights • Safer to pick up objects • No external energy input CONCLUSION PROBLEM DESIGN TESTING DESIGN REQ BUDGET CONCLUSION

21. INTRO • FUTURE RECOMMENDATIONS: • Reduce weight • Install wire-less actuator • Tuned Damper • Redesign lateral leg support CONCLUSION PROBLEM DESIGN TESTING DESIGN REQ BUDGET CONCLUSION

22. QUESTIONS? INTRO CONCLUSION PROBLEM DESIGN TESTING DESIGN REQ BUDGET CONCLUSION