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myDAQ Biomedical Instrumentation Board

myDAQ Biomedical Instrumentation Board. Group May1212 Jeremy Bruecken, Kossi Sessou , Alex Weiss Mani Mina - Advisor Andrew Watchorn - Client. Project Plan. National Instruments myDAQ. Low cost portable data acquisition unit Interfaces with NI LabView software

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myDAQ Biomedical Instrumentation Board

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  1. myDAQ Biomedical Instrumentation Board Group May1212 Jeremy Bruecken, KossiSessou, Alex Weiss Mani Mina - Advisor Andrew Watchorn - Client

  2. Project Plan National Instruments myDAQ • Low cost portable data acquisition unit • Interfaces with NI LabView software • Allows students to generate, measure, and analyze signals in real time

  3. Project Plan myDAQ Details

  4. Project Plan Problem Statement • National Instruments would like an add-on board to the myDAQ that will directly compete with the BioPac at a 40x price margin • The board should provide the necessary connections and LabView interface to allow for measurements done in an introductory Biomedical Engineering course at Iowa State University

  5. Project Plan Market Survey • BioPac currently sole competitor in market • Iowa State recently purchased BioPac kits for introductory class • Our product would be a simple unique solution

  6. Design Functional Requirements • Gain and filter signal from contact patches for EKG and EMG to the myDAQanalog input • Provide user interface for sending, receiving, and analyzing signals in LabView via myDAQ • Protect end user per IEC regulations

  7. Design Non-Functional Requirements • Simple plug and play hardware interface • Provide user friendly software interface in LabView • 40x lower price than BioPac • Allow for cheap and reliable manufacture

  8. Design Concept Sketch

  9. Design Filtering Methods • Initial design included numerous hardware components • Removed amplifier and passive elements and replaced with software filtering • Lowers cost of product

  10. Design EKG & EMG Safety • IEC compliant • Simple and effective • System is protected from large voltage spikes

  11. Design EKG & EMG Measurement Burr-Brown INA121Application Note

  12. Hardware • Built circuit with passive components to verify System Design • Used external Oscilloscope to verify output

  13. Hardware • Acquired Signal • Peaks are present in the acquired signal • Very little filtering is included in this signal

  14. LabView Interface Implementation • Capturing the Signals • Writes to file for processing

  15. Implementation Signal Processing and Filtering

  16. Front End – Acquire and Extract

  17. Finished Board • High Gain amplifier • Easy Connection • HPS shunt diodes • No filtering

  18. Task Breakdown • Jeremy • Complete circuit design • Perform Spice circuit analysis • Hardware • Kossi • Create LabView interface • Performed interface and hardware testing • Alex • Performed hardware testing • Design webpage

  19. Things learned • Working with client • Obtaining proper documentation • Ethics and Proper procedures • Meeting deadlines • Handling design issues

  20. Conclusion • Digital filtering Vs. Analog • Noise issues • How can we build upon this project: • Adding more devices • Adding functionality to program • Increase accuracy

  21. Questions? • myDAQ • NI instrumentation learning tool • EKG & EMG • Filter and Gain • Safety • System Diagram

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