Group #44 P ROJECT : S URFING M ITTENS Members: Dhananja Jayalath Ryan Mann Neil Olij Chris Wiebe Consultant: Dr. Hiren Patel

OUTLINE Introduction Problem Solution Risks And Mitigation Block Diagram Implementation plan and details Questions

PROBLEM Inexperienced gym members often perform exercises incorrectly Unproductive Leads to injury Experienced gym members have trouble maintaining a balanced workout schedule Paper and pencil is impractical Easy to lose track Personal training is expensive

SOLUTION EMG sensors integrated into workout clothing Detects muscle activation Displays real-time activation data to user Logs exercise repetitions over time Advantages: Unobtrusive Affordable Intuitive

RISKS AND MITIGATION Noise and interference – must reject common mode Contact motion ECG interference AC coupling Involuntary or unforced muscle activation – use calibration Physical integration of sensors into suit – use flexible PCB

SIGNAL ACQUISITION Differential dry-electrodes Instrumentation (differential) amplifier Band-pass filter (20 – 500 Hz) with 40 dB/dec roll-off Rectifier Integrator – low pass envelope Amplified/Filtered Gerdle, B., Karlsson S., Day, S., Djupsjobacka, M. Analysis of the Surface Electromyogram. Modern Techniques in Neuroscience. Chapter 26, 732 Rectified/Envelope

PROOF OF CONCEPT

Analog multiplexing Analog to Digital Conversion (ADC) STM32 ARM Cortex A3 Microcontroller Bluetooth module DATA AGGREGATION & PROCESSING

USER INTERFACE Custom Android application User-defined rep objectives Real-time data visualization Updated rep counting Reviewable rep history

QUESTIONS?