Heart Savers MidSemester Demo

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Heart SaversMid-Semester Demo

• Chris Hoffman
• Ryan Kellogg
• Mike Zizza
• February 28, 2007

http//www.ece.cmu.edu/ece549/spring07/team5/
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Project Concept

• Now
• Doctor's office or hospital - short visit
• Holter monitor - continuous home monitoring
• Asymptomatic Dont know when having a problem
• Later
• Wearable ECG monitor that fits into daily life
• Using 3 electrodes instead of 12
• Detect arrhythmia (irregular, faster, or slower)
• Patients of all types

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System architecture
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Status Update

• Accomplished
• Acquired parts
• Made parts talk
• Set up development environment
• Prototyping acquisition circuitry
• Risks mitigated
• Moved toward accurate data acquisition
• Worked out communication between Gumstix and
  Robostix through I2C
• Assumptions
• Circuit will work
• Communication with phone isnt tough
• Algorithms can be constructed to adequately
  process signal

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Eye Candy
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Demo Scenario
Console
Robostix
Gumstix
(Filtered) signal from body
Data/commu-nication over I2C
Data/comun-ication over Bluetooth
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Next steps

• Complete acquisition/filtering circuitry (with
  opto-isolation)
• Work out communication with phone
• Measure latency to determine time available for
  processing signal
• Do basic processing of signal ex heart rate
  detection
• More advanced processing ex arrhythmia
  detection
• Develop phone GUI

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Software architecture
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What weve learned

• Verify your hardware ships with power supply
• Opto-isolation required between electrode and
  circuit
• Making acquisition circuit trickier than
  originally thought
• Triple-check drivers work for all operating
  systems used
• Learned about Gumstix, Robostix, i2c, hardware
  virtualization, cross-compiling
• How to transfer files over serial

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Tentative Schedule