P15041: Smart Walker III
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Problem Definition

Table of Contents

Project Summary

The Smart Walker is a device that will assist the elderly or disabled with walking. In addition, the Smart Walker also measures and records its user’s vitals and other useful information. This gives elderly or disabled people more independence, and also simplifies the job of anyone potentially taking care of them. Currently there are prototypes for the Smart Walker, however they are incomplete and/or do not fit all of the criteria for the desired product. The goal of this project is to have a completely functional walker with several added capabilities. It should be able to monitor the vital signs of the user, detect if the user has fallen or is likely to fall, and have the ability to operate autonomously in certain situations. The Smart Walker must be able to perform self-navigation, fall detection, and sensor data logging while resembling a normal walker. Anything that was not already purchased under the previous designs must be incorporated into the $500 budget.

Our Week 3 project review can be found here.

Project Goals and Key Deliverables

The main goal of this project is to obtain system level completion of the Smart Walker, using Smart Walker I and Smart Walker II as bases. The walker must be tested with all main subsystems integrated together, and it must have the technology in place such that more advanced autonomous features can be added in the future.

Customer Requirements

Electrical Requirements
Wireless Capability.
The walker must collect BMI/Heart rate/Strain gauge data from the various systems and "dump" the data once a day.
All shorts must be located and fixed, all the loose wires need to be reconnected to their proper place.
The systems must undergo rigorous testing and still be functional.
Mechanical Requirements
The walker must collect data from the strain gauges to for the caretaker to detect lack of balance.
The clutch system must be redesigned to allow movement without added resistance.
The clutch/motor system housing may only act as a housing.
The walker must be able to support weight and move straight without the wheels bowing out.
The load cells must be tested.
The BMI sensors must be incorporated into the handles.
The systems must undergo rigorous testing and still be functional.
Medical Requirements
The systems must meet current medical standards.
The systems must be compatible with current medical systems.
Visual Requirements
The walker must not resemble a robotic walker.
There must be an enclosure for the XTION camera.
The Xtion must be unobtrusive and non-adjustable.

A complete Excel table with these updated requirements as well as the corresponding importance can be found in the Customer Requirements Table.

Engineering Requirements

An Excel sheet with these requirements as well as other metrics can be found in the Engineering Requirements Table.

Constraints


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