1. P17007 Hybrid Wheelchair 2.0 Kevin Layer (ME) Jonathon Price (ME)
Eric Hambleton (EE)
Jonathon Price (ME)
Andrew King (ISE)
Motivation:
Hybrid Wheelchair 2.0 is a manual/electric hybrid solution that can be attached to most wheelchairs. Manual wheelchairs can leave some users out of breath who lack significant upper body strength. Users are also presented with obstacles and potential dangers when on inclines and
Delivered to User:
Ease of Use and Functionality – Reliable in different terrain, weather, and use cases
Quickly Attached/Detached – Performed within a 30-second period
Low Cost - $1,687
Low Weight – 27 lbs.
Small Footprint – The prototype comfortably fits within the existing
other terrain that can prove difficult to navigate unassisted. Electric wheelchairs can leave users with the negative side-effect of upper body atrophy.
footprint of the wheelchair
Bluetooth Communication – Allows easy storage and attachment
Major Functions:
Figure 1: Design Concept CAD
Figure 2: Design build
Figure 3: Concept for user interface using Bluetooth
Bluetooth ARM Solution:
Decreased complexity and time of attachment with a wireless solution. A Cypress Pioneer Bluetooth Low Energy (BLE) Development Kit was initially explored, leading to the use of both a Cypress ARM PSoC 4 microcontroller and a PRoC microcontroller. The PRoC device receives an input from the user through a slide throttle and sends it to the PSoC device via Bluetooth. The PSoC device decodes the data and outputs a 3V, 60Hz PWM signal to the motor, varying the duty cycle to achieve a desired output torque from the motor.
Device Performance:
Standards:
Future Improvements:
Bluetooth Version Number 4.2
ISO Standards Pt. 5 – Wheelchair minimum folding dimensions remain unchanged with removable design
ANSI/RESNA Dynamic Stability – Both dynamic and static stability are established when device is in contact with ground
ANSI/RESNA Turning Radius – Turning radius is unchanged
Further weight reduction by using lighter metals and smaller batteries
Further cost reduction by investigating less expensive motors and gearboxes
Acknowledgements:
George Slack, Faculty Guide Mark Indovina, Bluetooth Development Rob Kraynik, Machining