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MyDAQ Biomedical Instrumentation Board Group May1212 Jeremy Bruecken, Kossi Sessou, Alex Weiss Mani Mina - Advisor Andrew Watchorn - Client.

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Presentation on theme: "MyDAQ Biomedical Instrumentation Board Group May1212 Jeremy Bruecken, Kossi Sessou, Alex Weiss Mani Mina - Advisor Andrew Watchorn - Client."— Presentation transcript:

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

2 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 myDAQ Details

4 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 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 Functional Requirements  Gain and filter signal from contact patches for EKG and EMG to the myDAQ analog input  Power to two LEDs and collect light transmittance information for pulse oximeter  Provide user interface for sending, receiving, and analyzing signals in LabView via myDAQ  Protect end user per IEC regulations

7 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 Concept Sketch

9 EKG & EMG Measurement Burr-Brown INA121Application Note

10 EKG & EMG Filter and Gain  ANSI/AAMI EC-11 requires low-pass of 40Hz and high pass filter of.67 Hz  Helps reduce 60Hz power noise  Will limit capability of EMG measurement  Gain of ~2000

11 EKG & EMG Safety  Still researching IEC specification  Options include optoelectric isolation, diode shunts, etc.

12 Pulse Oximeter Measurement  Use variation in light transmittance to determine blood oxygen level and pulse Images Courtesy of freescale.com

13 Pulse Oximeter Measurement  Pulse LEDs to get infrared and red absorption  Gain photodector signal and filter for analysis

14 Pulse Oximeter Gain  Use a transimpedance amplifier to generate a voltage signal  Gain will require adjustment depending on finger thickness Images Courtesy of freescale.com

15 Pulse Oximeter Filter  60Hz notch filter  Low pass 6Hz filter  High Pass.8Hz filter Images Courtesy of freescale.com

16 Pulse Oximeter Analysis  Signal will have AC and DC components  Use only AC to calculate oxygen level  Provides pulse reading Images Courtesy of freescale.com

17 System Flow Diagram

18 LabView Interface  Easy to use environment for capturing and analyzing biometrics

19 Labview Interface

20 Deliverables  Prototype add-on board with sensors  LabView software to collect and interpret data  Design document  Specification test document

21 Project Plan  Create design document for December 4 th  Review design through Spice testing and analysis  Parts ordered November 15 th  Begin hardware testing over break

22 Resource Requirements  Access to BioPac for comparison testing  IEC Safety Documentation  Spice simulation tools  Ability to order devices  Circuit testing equipment (Oscilloscope, DMM, Power supply)

23 Risks  Injury when performing tests of human body  Proper safety circuitry will prevent injury  Unable to meet 40x price margin goal  Client is aware this is likely  Inability to compete with BioPac  Focus on price should attract wide customer base

24 Task Breakdown  Jeremy  Complete circuit design  Perform Spice circuit analysis  Kossi  Create LabView interface  Perform interface and hardware testing  Alex  Perform hardware testing  Design webpage

25 Questions?  myDAQ  NI instrumentation learning tool  Add-on board to compete with BioPac  EKG & EMG  Filter and Gain  Safety  Pulse Oximeter  660nm and 940nm light absorption comparison  Filter and Gain  System Diagram  Project Plan  Resource Requirements  Risks  Tasks


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