HeartAware - MITweb.mit.edu/.../holachek_Project_Design_Presentation.pdf · 2015-11-12 · beats...
33
6.111 Final Project, Fall 2015 Michael Holachek and Nalini Singh HeartAware pulse oximetry system
Transcript of HeartAware - MITweb.mit.edu/.../holachek_Project_Design_Presentation.pdf · 2015-11-12 · beats...
6.111 Final Project, Fall 2015Michael Holachek and Nalini Singh
HeartAwarepulse oximetry system
HeartAware M. Holachek, N. Singh6.111 Fall 2015Motivation
● Develop variety of skills involved in FPGA design
● Explore medical applications
HeartAware M. Holachek, N. Singh6.111 Fall 2015System at a Glance
HeartAware M. Holachek, N. Singh6.111 Fall 2015System at a Glance
signal processing
pulse oximeter
analog control
display
audio
HeartAware M. Holachek, N. Singh6.111 Fall 2015System at a Glance
signal processing
pulse oximeter
analog control
display
audio
Figures courtesy Freescale “Pulse Oximeter Fundamentals and Design”
HeartAware M. Holachek, N. Singh6.111 Fall 2015Pulse Oximetry
Figures courtesy Freescale “Pulse Oximeter Fundamentals and Design”
HeartAware M. Holachek, N. Singh6.111 Fall 2015Pulse Oximetry
Figures courtesy Freescale “Pulse Oximeter Fundamentals and Design”
HeartAware M. Holachek, N. Singh6.111 Fall 2015Pulse Oximetry
HeartAware M. Holachek, N. Singh6.111 Fall 2015Pulse Oximetry
HeartAware M. Holachek, N. Singh6.111 Fall 2015System at a Glance
signal processing
pulse oximeter
analog control
display
audio
HeartAware M. Holachek, N. Singh6.111 Fall 2015System at a Glance
signal processing
pulse oximeter
analog control
display
audio
HeartAware M. Holachek, N. Singh6.111 Fall 2015Analog Circuitry
Pulse oximeter analog driving circuitry designed by Prof. Hom
pulse ox
HeartAware M. Holachek, N. Singh6.111 Fall 2015Analog Circuitry
Pulse oximeter analog driving circuitry designed by Prof. Hom
driving circuitry
pulse ox
HeartAware M. Holachek, N. Singh6.111 Fall 2015Analog Circuitry
Pulse oximeter analog driving circuitry designed by Prof. Hom
driving circuitry filtering op-amp
pulse ox
HeartAware M. Holachek, N. Singh6.111 Fall 2015Analog Circuitry
Pulse oximeter analog driving circuitry designed by Prof. Hom
driving circuitry filtering op-amp ADC
pulse ox
HeartAware M. Holachek, N. Singh6.111 Fall 2015Analog Circuitry
Pulse oximeter analog driving circuitry designed by Prof. Hom
driving circuitry filtering op-amp ADC
nexys 4pulse ox
HeartAware M. Holachek, N. Singh6.111 Fall 2015Analog Circuitry
custom HeartAware PCB
HeartAware M. Holachek, N. Singh6.111 Fall 2015System at a Glance
signal processing
pulse oximeter
analog control
display
audio
HeartAware M. Holachek, N. Singh6.111 Fall 2015System at a Glance
signal processing
pulse oximeter
analog control
display
audio
HeartAware M. Holachek, N. Singh6.111 Fall 2015Signal Processing
mVNoisy Input Signal
Time(s)
HeartAware M. Holachek, N. Singh6.111 Fall 2015Signal Processing
mV
mV
Noisy Input Signal
Filtered Input Signal
Time(s)
HeartAware M. Holachek, N. Singh6.111 Fall 2015Signal Processing
Time(s)m
Vm
Vm
V2 /s
Noisy Input Signal
Filtered Input Signal
Squared Derivative
HeartAware M. Holachek, N. Singh6.111 Fall 2015Signal Processing
Time(s)
mV
mV
mV2 /s
mV2
Noisy Input Signal
Filtered Input Signal
Squared Derivative
Window Integration
HeartAware M. Holachek, N. Singh6.111 Fall 2015System at a Glance
signal processing
pulse oximeter
analog control
display
audio
HeartAware M. Holachek, N. Singh6.111 Fall 2015System at a Glance
signal processing
pulse oximeter
analog control
display
audio
HeartAware M. Holachek, N. Singh6.111 Fall 2015Display Output
● Current heart rate
● Smoothed oxygen saturation waveform
HeartAware M. Holachek, N. Singh6.111 Fall 2015System at a Glance
signal processing
pulse oximeter
analog control
display
audio
HeartAware M. Holachek, N. Singh6.111 Fall 2015System at a Glance
signal processing
pulse oximeter
analog control
display
audio
HeartAware M. Holachek, N. Singh6.111 Fall 2015Audio Output
beep440Hz frequency100ms duration
announcerannounces “40-199 beats per minute”
SD cardstorage of voice
samples
hr_pulse
hr_number audio mixervolume controls
HeartAware M. Holachek, N. Singh6.111 Fall 2015System Block Diagram
HeartAware M. Holachek, N. Singh6.111 Fall 2015Top Level Finite State Machine
HeartAware M. Holachek, N. Singh6.111 Fall 2015Potential Issues
● Signal variations
● RAM sizes / buffering
● Clear VGA graphics
HeartAware M. Holachek, N. Singh6.111 Fall 2015Timeline
Week 10/26
Week 11/2
Week 11/9
Week 11/16
Week 11/23
Week 11/30
Week 12/7
Project Proposal & Requirements Both
Analog Circuitry & PCB Michael
Signal Processing Nalini
Display Output Both
Audio Output Michael
Integration & Testing Both
Alternate Filters Nalini
UI Improvements, Night Mode Michael
Final Testing & Buffer Both
