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Brain Signal Operated Technologies

Brain Signal Operated Technologies. Brain Signal Controlled Device January 2007. Presentation Outline. Project Background Our Product System Overview High Level Design Business Case Group Dynamics Conclusion Q&A. Roles In Project. Heng Wei Lester Lan (COO, CTO) Victor Yu (CEO, CFO)

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Brain Signal Operated Technologies

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  1. Brain Signal Operated Technologies Brain Signal Controlled Device January 2007 BSO Technologies

  2. Presentation Outline • Project Background • Our Product • System Overview • High Level Design • Business Case • Group Dynamics • Conclusion • Q&A BSO Technologies

  3. Roles In Project • Heng Wei Lester Lan (COO, CTO) • Victor Yu (CEO, CFO) • Missing Member 1 • Missing Member 2 • Missing Member 3 • Missing Member 4 BSO Technologies

  4. Project Motivation • Neurological diseases • Degeneration of nerve cells in brain and spinal cord • Cognitive abilities remain intact • 3000 Canadians diagnosed with ALS today • 2 to 3 die each day • Offer an alternative way of living for the disabled BSO Technologies

  5. Projection Motivation http://en.wikipedia.org/wiki/Image:Stephen_Hawking_050506.jpg BSO Technologies

  6. Project Motivation • Conventional Brain-Computer Interface with passive electrodes • Sticky gel makes hair messy • Long set-up time BSO Technologies

  7. Electroencephalography • Place electrodes on scalp • Electrodes detect brain signals • Signals are processed by hardware and software • Alter signals by moving muscles, blinking eyes, sleeping, etc BSO Technologies

  8. System Overview • Modular EEG • Easy to set-up • 2 channels BSO Technologies

  9. Head Gear • Face shield as head gear • Gold pin array as electrode • Ear clip as reference electrode BSO Technologies

  10. Pin Electrodes • 2X5 gold pin arrays • Contact scalp directly • Pressure but no/little pain BSO Technologies

  11. Pre-Amplification • Extract brain signals via electrodes • Instrumentation amplifier increases signal strength • Op-amp prevents other body currents from entering instrumentation amplifier • Send to amp stage through a cable and D-sub connectors BSO Technologies

  12. Amplification and Filtering BSO Technologies

  13. Amplification and Filtering • 2 second-order low pass filters • Amplifier with fixed gain of 100 • Amplifier with variable gain of 1-150 • AC coupled high pass filter • Powered by batteries • Standard DC power supply works too BSO Technologies

  14. DAQ Software PCI Interface • PCI 6024E DAQ • 2 outputs from amp stage connect to 2 analog channels in DAQ • Ground signal from amp stage connect to analog input ground in DAQ Hardware BSO Technologies

  15. Software Implementation BSO Technologies

  16. Software Implementation • Brain signals displayed and analyzed in LabVIEW • DAQ assistant in LabVIEW helped reading signals • Sampled at 1000Hz • Further filtered with a 45Hz LPF and a 60Hz notch filter • Filtered signals way cleaner than raw inputs BSO Technologies

  17. Problems Encountered • Electrode placements • No prior biomedical knowledge • Low voltage signal • Interfered by noise • Hard to control brainwaves • Cannot turn on op-amps • AD625 -> INA128 • LabVIEW sampling rate • Long delay time if requesting too many samples BSO Technologies

  18. Results BSO Technologies

  19. Results http://en.wikipedia.org/wiki/Image:Eeg_raw.svg BSO Technologies

  20. Results – Sleepy but Awake BSO Technologies

  21. Marketing Plan • Targeting markets • Researchers • Hospitals • People with disabilities • Provide on-site training • Start in North America and expand worldwide BSO Technologies

  22. Budget Total Project Expense: $360.28 BSO Technologies

  23. Selling Price • Possible unit manufacturing cost of <$50 • Unit selling price of ~$100 • Much lower than that of commercial complex EEG systems • Raise price as more features are being added BSO Technologies

  24. Potential Competitors • Many commercial EEG systems exist • Futherhealth.org • EEG system with 500 displays • Costs $3,450 • WaveRider Pro • Biofeedback system with 4 channels reading from brain, heart, and muscles • Costs $1,700 BSO Technologies

  25. Group Dynamics • Formed in summer 2006 • Started with 6, ended up with 2 • Group communications • Caucus -> Email -> Phones • Group meetings • 3 times a week • Late or no show BSO Technologies

  26. Group Dynamics • Group Members Leaving • Simply disappear • No pre-requisite • Afraid of too much work • Family problems/Co-op • Individual Tasks • Not done • Lied to others by saying tasks were done BSO Technologies

  27. What We Learned • Technical Skills • Biological structure of the brain • Hardware assembly • Soft Skills • Team work • Expect the unexpected • Contingency Plans • Working in groups of 2, 3, 4, 5, and 6 BSO Technologies

  28. Future Work • PONG game! • More signal analysis in LabVIEW • Store different brainwaves for different thoughts • Two players competing against each other • Brain-controlled toys BSO Technologies

  29. Conclusion • Acquired various technical and communication skills • (Kind of) overcame the collapse of the group • Product may one day help the disabled • Fun, educational, and frustrating… BSO Technologies

  30. Acknowledgements • Brad Oldham • Troy Tyler • Andrew and Steve’s extension • Ex-group members • Anyone who saw our group’s disaster and offered help BSO Technologies

  31. Questions? BSO Technologies

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