One Step At A Time

Project Description:

In partnership with the Bruyere Institute, Algonquin College Electrical Engineering Technology students were tasked with finding a solution to tracking the mobility of their recovering patients. As a result of this request, the idea of a primitive Fitbit design that attaches to the leg was the best solution to produce accurate results. For it to see testing phases, it must be comfortable for the patient to wear and be easily accessible.

The initial phase of the project had multiple iterations over the course of the first year, however, issues arose. Due to COVID-19, the group was unable to bring the project to completion. With the new team taking over the project, the requirements for the scope were modified. Changes to the scope from the previous year’s group included the unit being self-powered, rechargeable and featuring an easy-to-read display. The earlier designs were a successful proof of concept for their design; however, a final iteration was never completed and could not be continued.

After extensive research, simulation, and personal component testing, the team created our first design. Using risk management strategies, we created a PCB test board. This test board allowed the team to practice creating a PCB for the first time, while verifying the power and communication circuits separately.

Creating a device that must be mounted on a patient’s leg created a new challenge for the team. Not only must the device perform well, but it must also not cause pain, irritation, or be too heavy for our most vulnerable patients. A housing and mounting for the device had to provide easy access to check the steps taken.

Coding the sensitivity of an accelerometer to track the steps proved another important factor that was critical to the project’s success. Dealing with patients of all heights and movement ability means that the sensitivity of the device is important. It must be able to detect and record the light steps that may or may not be completing a full movement of the leg.

This project connected major concepts in the program, showing a real-world application of the material. Keeping an open dialogue on all aspects of the design process ensured the team could consider new risks that may have been missed in other environments where you are working under pressure. The team was able to bring all their skills to the table to create a final product.

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