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P14007: Wheelchair Assist Final Presentation. Che -An Lee – Industrial and System Engineer Dan Schuster – Mechanical Engineer Phil Medalie – Mechanical Engineer Tom Elliot – Electrical Engineer Sponsor: Multidisciplinary Senior Design Program. Agenda. Project Description Design Concept

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p14007 wheelchair assist final presentation

P14007: Wheelchair AssistFinal Presentation

Che-An Lee – Industrial and System Engineer

Dan Schuster – Mechanical Engineer

Phil Medalie – Mechanical Engineer

Tom Elliot – Electrical Engineer

  • Sponsor: Multidisciplinary Senior Design Program
agenda
Agenda
  • Project Description
  • Design Concept
  • System Architecture
  • Project Status
  • Test Results
  • Conclusion
project description
Project Description
  • Design a low cost device that maintain the characteristic of a manual wheelchair and prevent the wheelchair to roll back
  • Key Customer Needs and Engineering Metrics:
design concept
Design Concept

Caliper

Brake Disk

Pawl

Ratchet

Bearing Block

design concept cont
Design Concept Cont.

Brake Disk

Pawl

Ratchet

Bearing Block

Caliper

design concept cont2
Design Concept Cont.
  • Left Generator Input Banana Clips
  • Right Generator Input Banana Clips
  • Both Bridge Rectifiers
  • Circuit Breaker Switch
  • Zener Diode
  • Buck-Boost Regulator 5 Volts
  • USB out with USB Circuitry.
project status
Project Status
  • Design meets all customer needs except:
    • Weight (0.5 lbs over)
    • Charging system is not on the chair
  • Unable to test:
    • Maximum weight at 10 degree incline
  • Completed BOM for working prototype
  • Completed all mechanical systems under budget
conclusion
Conclusion

Current Results:

  • Demonstrated a cost effective solution for rolling backwards
  • Design maintains important characteristics of a manual wheelchair
  • Generator system succeeded in charging a battery

Future Work:

  • Weight reduction
  • Universally adaptable to most manual wheelchairs
  • Incorporate movement assist into design
  • More efficient generator system to charge batteries at lower speeds
ad