Elevator Controller for Individual with Multiple Sclerosis Team Members: Alison Boumeester, Sara Karle, Michele Lorenz, Ashley Matsick, Peter Strohm Client: Dr. John Fleming, Department of Neurology, UW-Medical School Advisor: Professor John Webster, Department of Biomedical Engineering, UW-Madison

Overview Motivation & Background Problem Statement Prototype Project Goals Control Options Future Work

Motivation & Background Patient fully independent inside apartment (automation) Mobility impaired by inability to use elevators Movement limited to head and neck Existing controls mounted on horizontal bar Space available Bar less than 12 inches from user’s chest

Problem Statement Integrate current mechanical prototype into user’s environment implement adaptive controls mount controls and prototype on wheelchair avoid interfering with normal mobility/function

Prototype: Spring 2006 Mechanical device includes: Solenoid & six-bar mechanism for in/out pushing force (A) Linear actuator for up/down movement (B) Protective case with actuator guide (C)

Project Goals: Fall 2006 Choose adaptive controls based on user’s preferences Develop circuitry for actuator (latch mode) Build mounting arm for actuator Mount and power entire system Build weatherproof cover

Control Array Options Membrane/pad switches Pros: Low cost, simple circuitry Cons: Limited application (momentary contact) Trade-off: size & ease of contact Tongue(1) or eyebrow(2) switch Pros: Dual mode Cons: Comfort, high cost, mounting (1) (2) enablingdevices.com

Control Array Options Sip/Puff Switch Ultimate Switch Pros: Dual mode, fits user preferences, ease of use Cons: High cost, size of components Ultimate Switch Simple operation and mounting, low cost

Future Work: Mounting Current wheelchair setup requires: Mounting device on level part of chair Location between thigh & feet No interference with chair function Width of device & wheelchair Movement of rotating leg rests

Future Work: Weatherproofing & Power Develop strong, removable cover Device components exposed, fragile Weather Physical damage to device/surroundings Allow for maintenance Integrate components (switches and prototype) with chair Two existing 12 V batteries

Questions?