WEMS AT A
GLANCE
ELG 4911 (Winter 2008) Project
II
April 10, 2008
Today is the FINAL
DEMONSTRATION DAY for the Wireless ECG Monitoring System. The
Demonstration will be help at 8:30 am at STE 2061. There will also
be a presentation of the project at 14:30 in STE
E118
There was a DEMONSTATION VIDEO taken today for the entire
working device. The Video will be update and posted on the website
shortly.
April 08, 2008
The Final Device has
been built and fully functional. We have been doing numerous test
cases to fix any exisiting bug in the code structure. The Release
Candidate 1 will be released on April 10,
2008
March 28, 2008
Our project is now
in its final stages. All our hardware components have been tested
and mounted onto the PCB. We have starting packaging the components
and will continue to do so for the next two weeks until our demo.
As for signal
acquisition, we are receiving and analog signal from the heart using
the electrodes and it is being filter and amplified as required and
then being transmitted to the microcontroller.
The HC12 works as
required: receiving the analog input, converting it to digital and
sending it out the serial output. The HC12 is also sending the
Bluetooth connection string to the PC and a Bluetooth connection is
established.
Matlab is opening
the port and taking readings at a used defined frequency. The data
is then processed and filtered using the FIR filter with a sampling
frequency of 1200Hz.
Our GUI is almost
ready and allows the user to enter the frequency of readings to be
taken as well as allows you to choose the patient you would like to
view.
Over the next two
weeks we will be developing the GUI as well as the matlab code to
have more functionality.
March 14,
2008
The PCB has been designed and implemented;
all components work as required. We are also working on acquiring
the signal using the electrodes. This includes finding the proper
position to get the best signal strength. The work on acquiring the
signal will continue over the next couple of weeks. We will also be working on
packaging all the components.
The
microcontroller has been programmed to send the converted data via
theBluetooth com. Port. The port is then opened using
matlab and the data is received, converted back to analog, and saved
as .xls files and .jpeg images according to the date and time. The
readings are taken every 30 minutes and are stored. Over the next two weeks we
will be working on reconnecting the Bluetooth module once out of
range and storing the data in the ROM.
We have also been working on the GUI which
is almost completed. The GUI was also made into an .exe file so that
it would run in a stand alone mode. Over the next two weeks we will
be expanding on the GUI.
We have also designed out FIR filter of
order 7. Over then next two weeks we will be working on comparing
the signal (possibly using the power spectral density of the
signals) and alarming the nurse when
necessary.
February Feb 7,
2008
Significant progress has been made by our group in the
last 2 weeks. The
microcontroller, HCS12, has been programmed to function as an analog
to digital converter and has compiled without errors. It has also
been tested and works as required. The Bluetooth is successfully
communicating with other Bluetooth devices and we are now able to
manually transfer user defined data. As for the hardware
components, both the low pass filter and instrumental amplifier have
been constructed and tested and are functioning accurately. The instrumental amplifier
is returning a gain of near 1000 V/V, and the Low pass filter is
exhibiting excellent filtering characteristics removing high
frequencies.
We are now in the process of incorporating the Bluetooth
module in the HC12 and allowing the data to be transferred to the
PC. We are also working on the notch filter and soldering the
components.
Over the next two weeks we will focus on sending the data by
Bluetooth (and including it in the HC12 code) and accepting it in a
text file on the PC end and sending it to Bluetooth for further
processing. We will also focus on testing the filters and amplifier
and soldering all the components.
January
29, 2008
Our group had a fantastic
effort and performance in the previous term for ELG 4911. This term
for ELG 4911, we are working the implementation part of our project.
We handed in the project review (strengths and weaknesses) on
January 17, 2008. In this semester we have already chosen the
devices we need to work with. For our microcontroller we have picked
the Motorola 9S12DP256 board. We have also gathered our three
filters; low pass filter, high pass filter and 2nd order
notch filter. Our organization of gather all hardware is almost
complete except we still need to get a SOIC to Dip converter for one
of our device. We also have been working on Code warrior to
implement the software part of the ADC to make it functional. At the
same time we also have been working on Bluetooth communication part
of the project. We chose to use Class II Dr. Robot MCB 3100 series
Bluetooth device for our project. We are still facing some bugs in
our code.
In the next
two weeks we expect to expand on our work with more work on the
hardware part of our project. We will be putting together all our
parts together and start acquiring signal from the heart and check
it on the oscilloscope in the mean while we also will be working on
the software.
ELG 4910 ( Fall 2007) Project I
Final Presentation Slides (in .pptx)
Final Report ( in
.docx) Excludes Matlab Codes (Copyright purpose)
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