CENG/ELEC 499 Group One

2010

 
 

The scope of this project was to develop and produce a working prototype of a digital stethoscope that would be both accurate and cheap to produce. The intent of the device was to help reduce the cost of telemedicine.


Development included the design and construction of a piezoelectric chest piece that was able to accurately capture internal body sounds, amplification and filtering circuit to magnify the captured signals, and a microcontroller program that was able to manipulate process the signal outputting both live to a set of headphones as well as store the results on a USB key. A prototype was constructed successfully on time and at with a production budget of well under $150. Features provided were as follows:

  1. •Accurate detection of internal body sounds (Heard, Lungs, and bowel operations are easily detectable)

  2. •An accurate auditory response between 20Hz to 20KHz

  3. •Sound Enhancement (Ultra high frequencies were removed from the signal.

  4. •USB audio recording for later review or remote analysis

  5. •Digital sound

Project Updates

  1. •July 23 - Project Completed. All requirements met.

  2. -Public presentation held in ELW lobby

  3. -Achieved second place for demonstration presentations

  4. •July 21 - Sorted out license.  We can now compile more than 256 kB

  5. •July 16 - USB Activity (kind of) working- can’t compile > 256 kB

  6. •July 14 - Listened to DIGITAL OUTPUT!

  7. •July 7 - Amplifier iteration 3

  8. •July 1 - Semaphores Implemented

  9. •June 21 - Signal Output Achieved

  10. •June 14 - Amplifier iteration 2

  11. •June 12 - Programmed ADC

  12. •June 4 - Programmed interrupt request

  13. •June 1 - Amplifier iteration 1 in action

  14. •May 28 - iHeart website goes live (Content updates required)

  15. •May 28 - New iHeart Logo completed & Site layout complete

  16. •May 27 - Programmed the 52259MC with a basic MXQ LED program

  17. •May 26 - Analogue Amplification circuit design completed

  18. •May 22 - Group email list and webpage setup

CENG/ELEC 499

Project Stats

name  iHEART

location  University of Victoria

Department  Electrical & Computer Engineering

subjects  CENG/ELEC 499

Heart Rate Response Detected by Project Prototype