A cost effective smart insole system for real time gait analysis

Smart insoles have great potential as they offer real-time monitoring, analysis, and feedback for foot biomechanics, aiding in injury prevention and athletic performance improvement. Although off-the-shelf smart insoles exists, and solutions have been proposed, they are either very expensive, non-integrable, or lack sensors. In the current work, a low- cost fully integrated smart insole is introduced. The design integrates Force Sensing Resistors (FSRs), a 9-DOF IMU, Bluetooth Low Energy (BLE), and wireless charging. The system can transmit in real-time at 100Hz for more than 6 hours with a 40mAh battery. It can accurately identify walking and running patterns with great synchronization between the left and right foot.