Wearable Shoe Insole Prototype

3 force sensors embedded in the sandal bed plug into a 3D printed device hub worn around the ankle.

3 force sensors embedded in the sandal bed plug into a 3D printed device hub worn around the ankle.

We surprised one of our shoe insole company clients with this prototype for a connected shoe insole that can track the movement of, and weight placed on, the foot. I improved upon an existing concept and developed this proof of concept using Adidas sandals, XBee wireless radios, force sensors, an accelerometer, and NodeJS. We may do a small run of a much improved version using Bluetooth and iOS for a promotional documentary/commercial

My proof of concept illustrates a future shoe insole that:

1. Can support sensors under the foot

2. Is connected to a small device that contains an accelerometer and wireless technology

3. Transfers data to a mobile device

While we do not necessarily intend to build a real time view of your activity as shown in the video, the visualization was necessary to show stakeholders that we are able to capture the sensor data for future analysis and storage. A fully realized product of this kind would require additional sensors, such as a gyroscope, that were outside the scope and budget for this proof of concept.

Here's what the desktop view looked like when the insole was turned on. One of the two videos missed my hand clap, so I don't think the split screen videos actually line up. Nobody in office seemed to mind that day however, since they were able to witness a freak walking around with a boot on one foot, a potential bomb on the other foot, and a selfie stick pointed at his feet.

This is the 3D printed device hub worn around the ankle. It contains 2 AA batteries, an accelerometer, XBee radio, and an on/off switch. A red LED indicates that the device is on. The force sensors from the sandal bed plug into it.

This is the 3D printed device hub worn around the ankle. It contains 2 AA batteries, an accelerometer, XBee radio, and an on/off switch. A red LED indicates that the device is on. The force sensors from the sandal bed plug into it.