P14007 wheelchair assist final presentation
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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 cont1
Design Concept Cont.


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



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