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Final Presentation Review

This presentation reviews the final project on foot and knee monitoring system. It includes team members, responsibilities, hardware and software integration, sensors, EMG sensing, software development, and more.

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Final Presentation Review

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  1. PerFectIT Final Presentation Review March 21, 2018

  2. Introducing team members Andrew Sjogren Maxwell Gerhardson Sai Yarram Nick Raymond

  3. Block Diagram

  4. Individual Responsibilities Hardware Team Andrew Sjogren • Decision between FSR and Piezo Sensors • Implementation of chosen sensor into constructed foot insoles • Testing and calibration of foot insoles • PCB schematic design for foot insoles • Data collection Maxwell Gerhardson • Design and implement AD8232 for EMG sensing into knee brace • PCB design for EMG sensing circuit • Implement 9DOF razor IMU • Data Collection Software Team Sai Yarram • Server and Backend development and Implementation • User Authentication, Data Storage/Retrieval Implementation • UI and Algorithm Development Nick Raymond • Hardware and Software Integration • Implementation of Bluetooth • Weight calibration analysis with FSR • UI and Algorithm Development

  5. Inertial Measuring Unit Inertial Measuring Unit • SparkFun 9DoF Razor IMU MO • Senses Euler angles: • < time, pitch, roll, yaw > • Communicates data to Raspberry Pi via Bluetooth • Data analytics to be performed on Raspberry Pi

  6. Foot Sensors Furthest Point of Progress: Hooked into breadboard Communicating simultaneous data via Bluetooth to Raspberry Pi Upon migration to Protoboard, shorting of 3.7 V battery Could be due to hand soldering overlaps, although none were observed

  7. Foot Sensor Schematic (PCB Design)

  8. Foot Sensor PCB

  9. EMG Knee Brace EMG Sensors • Conductive fabric electrodes • Signal detection • Sewn into knee brace • Analog Devices AD8232 • Amplifier (~ 40dB of gain) • Filter (single-pole HPF @ 5Hz)

  10. EMG PCB Design

  11. Weight Calibration -Good Relativity -Inside of foot takes on more of weight with added load -Clear weight shift from standing to squatting

  12. Power Budget

  13. Software Design Specifications • Database Storage Options • SQLite • AWS • Firebase • SQLite • Light weight, no network access, relational • AWS • Cloud Service, User Authentication, Cloud Storage • Firebase • Cloud Service, User Authentication, NoSQL, Cloud Storage, Compatible

  14. Block Diagram • Splash Screen • Main Activity • Display Message Activity • Branch: • Workout Activity • Metric Activity • Progress Activity

  15. Thank you Questions?

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