The SoleTrainer monitors weight-bearing precautions for the user, providing a lightweight, instant feedback solution.
Patients with leg and traumatic brain injuries struggle to monitor weight bearing precautions, hindering their rehab when precautions are violated. The SoleTrainer detects and sounds an alert for patients and therapists when the weight threshold is exceeded.
It's lightweight, unobtrusive, and easily attaches to most adult shoes with an adjustable nylon strap. The electronics are housed in a 3D printed box on top of the shoe.
The electronics design incorporates a force sensing resistor, speaker, and microcontroller. The force sensing resistor is housed in a silicon and plastic sole plate underneath the shoe. It’s calibrated, and sends a signal related to weight sensed up to 40 pounds. The microprocessor reads the analog signal, and detects when the programmed threshold is exceeded, using the speaker to play a 100dB tone. The device is powered by a rechargeable lithium coin cell battery, allowing for it to be mobile and reusable.
Assembled Circuit
Circuit Diagram
Housing 3D Print
Features:
- Attaches to any adult gym shoe
- Light weight: 120g
- Precise weight sensing up to 40lbs
- Attachment time: <1min
-Rechargeable battery life: 90min
The SoleTrainer was developed to meet the needs of rehab physicians and patients at Shirley Ryan Ability Center. This prototype was sent to them for trial and feedback.
