INTRODUCTION ADJUSTABLE MECHANICAL STILTS INTRO PROBLEM DESIGN TESTING DESIGN REQ BUDGET CONCLUSION

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

PROBLEM CURRENT STILTS: 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 DESIGN TESTING DESIGN REQ BUDGET CONCLUSION

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

PROBLEM INTRO PROBLEM DESIGN TESTING DESIGN REQ BUDGET CONCLUSION

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

DESIGN LIFTING DEVICE: THE SCISSOR LIFT 4 lockable heights INTRO 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”

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

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

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

TESTING DIMENSION VERIFICATION: INTRO PROBLEM Several design requirements based on physical dimensions and weight DESIGN TESTING DESIGN REQ Dimension Length Base Width Max Width Max Height Average 12” 4.25” 6.8” 23.075” BUDGET CONCLUSION Dimension Upper Step Lower Step Closed Height Weight Average 19.825” 15.425” 7.875” 13.8 lb

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

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

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

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

DESIGN REQ. 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 PROBLEM DESIGN TESTING DESIGN REQ BUDGET CONCLUSION

DESIGN REQ. The weight of each stilt will not exceed 25 lbs. 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. PROBLEM DESIGN TESTING DESIGN REQ BUDGET CONCLUSION

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

BUDGET INTRO Item Total Cost Stilts $412.50 Hardware $192.40 Aluminum Plating $265.55 Aluminum Flat Bars $ 27.12 Aluminum Round Bar $ 4.52 Steel Round Bar $ 5.51 Concept Prototype $ 50.00 Actuator $ 22.40 Locking Mechanism $ 8.25 Damper $172.40 Miscellaneous $ 24.56 PROBLEM DESIGN TESTING DESIGN REQ BUDGET CONCLUSION TOTAL $1,185.21 DECEMBER BUDGET $1,274.16

CONCLUSION POSITIVE FEATURES: 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 PROBLEM DESIGN TESTING DESIGN REQ BUDGET CONCLUSION

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

CONCLUSION QUESTIONS? INTRO PROBLEM DESIGN TESTING DESIGN REQ BUDGET