1 / 17

Heart Rate Monitor and Data Acquisition System

Heart Rate Monitor and Data Acquisition System. Senior Design Project University of Illinois Bill Leece and Sofoklis Nikiforos. Introduction. Design an ECG Display heart beat Display heart rate Count Calories. Motivation. Interest in Digital and Analog Electronics

raanan
Download Presentation

Heart Rate Monitor and Data Acquisition System

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Heart Rate Monitor and Data Acquisition System Senior Design Project University of Illinois Bill Leece and Sofoklis Nikiforos

  2. Introduction • Design an ECG • Display heart beat • Display heart rate • Count Calories

  3. Motivation • Interest in Digital and Analog Electronics • Interest, but not necessarily experience, in Bioengineering • Bill will be doing circuit design for pacemakers with Medtronic in the fall • Nick is considering Bioengineering courses

  4. Overview • Design considerations • Hardware • Software • Strengths and Weaknesses • Cost Analysis

  5. Design Specifics • Biopotential electrodes • Amplifier circuit • PC interface via DAQ • LabVIEW software

  6. Block Diagram

  7. Hardware Diagram Right Leg Circuit Input from Right Leg Pre Amp Bandpass Filter and Power Amplifier Input from Electrodes Output to PC

  8. ECG Characteristics • Preamplifier • Low gain • Eliminates unwanted signals (interference) • Driven Right Leg Circuit • Minimizes interference • Electrically safe for patient

  9. ECG Characteristics (Cont.) • Power Amplifier and Bandpass Filter • Industry standards are set at 0.05Hz-150Hz • Amplification is essential in order to record the signal to a recorder • Output to PC • The analog signal is sent to the PC via the DAQ • LabVIEW software performs signal analysis on data it receives from the DAQ

  10. LabVIEW Software • Graphical Programming Language • Useful for Data Acquisition • Easy to Debug

  11. LabVIEW Hierarchy

  12. Heart Rate Monitor Front Panel • Enter age, weight, and resting heart rate • The Heart Rate Monitor Front Panel VI outputs the user’s maximum and minimum target heart rate needed for maximum calorie burning during exercise • The age and weight data is then sent to the ECG subVI

  13. ECG • Displays ECG data • User controls sampling rate • Displays BPM and calories burned • Problems encountered

  14. Timing Circuit • Used to keep time for BPM calculations • Makes sure that the program keeps real world time • Problems encountered

  15. Counter • Counts rising edges of ECG pulse for BPM calculations • Uses signal averaging to accurately count noisy signals • Problems encountered • Now lets look at a cost analysis of this project…

  16. Prototype Cost Analysis • Case (Chassis) $ 10 • Printed Circuit Board $ 100 • OpAmps $ 5 • Resistors, Capacitors, Etc. $ 5 • Software (LabVIEW 5.1) $ 995 • NI-DAQ $ 795_ • Total Parts Cost $1,810

  17. Conclusion • Strengths and Weaknesses • Areas that could be improved • Questions?

More Related