Mohamed Eyad
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Biomedical Engineering course · 2023 · Grade A

Step Scope: wearable gait and plantar-pressure monitor

A wireless, portable and wearable system that uses IMUs and force-sensitive resistors to monitor plantar pressure and gait in people with diabetic foot disease or neurological conditions that affect walking.

  • CourseBiomedical Engineering, Ain Shams University, supervised by the HCM Lab
  • HardwareESP8266 · MPU6050 IMUs · force-sensitive resistors
  • SoftwarePython GUI
  • GradeA
Code on GitHubVideo on YouTube

Features

  • Real-time visualization of foot pressure with colour coding
  • Measurement of spatiotemporal gait parameters
  • Detection of gait events and phases
  • Analysis of shank kinematics
  • Estimation of the center of pressure (CoP)
  • Assessment of patient stability from the FSR and IMU data

The data is sent wirelessly to a PC for visualization, analysis and reporting. We paid particular attention to clean wiring, reliable communication, the software and the user interface.

Graphical user interface

Step Scope GUI form for entering patient data
Entering the patient data
Step Scope live view with the gait cycle and a plantar-pressure map
Live view at mid-stance: pressure map, connection status, gait phase and knee angle

Hardware

Sensorized insole connected to the wireless ESP8266 unit
The sensorized insole and the wireless ESP8266 unit
Step Scope strapped to a leg next to a laptop showing the live GUI
Step Scope during a walking test, with the live GUI

Video

Project video: the system, the GUI and a walking test.

Tech stack

  • ESP8266
  • MPU6050 IMUs
  • Force-sensitive resistors
  • Python
  • Wireless data streaming
  • Gait analysis