Moshi
Moshi,
It
is semester break week...!! I'm on a week holiday...Its so comfortable to stay
at home...hehe :) Home sweet home.
So,
for this week, I have been working on the Blood Pressure (BP) circuit. It is a
bit difficult to find a working circuit that can operates accordingly. I keep
on having trouble to find a complete BP circuit. At first I decided to make the
BP circuit by referring to the link below: click here to download the pdf
However
after consultation with my supervisor, Madam Zabariah and discussion with the
lab engineer, Mr. Faizal, I have come to a decision to make the BP circuit
exactly like the BP training board which is available in our Medical lab.
I've
attached some images of the training board from our lab for your viewing
purposes. This training board is use by the medical students to understand the
working operation of the BP circuit. It may look simple but it is very
expensive! Here have a look at this link to understand more on the KL-720
Biomedical Measurement System
click here to read more on this product :)
What
is the KL-720 Biomedical Measurement System
Figure
1: KL-720 full set
- This equipment is intended for students to learn how to design specific measuring circuits and detect the basic physiological signals with practical operation.
- Moreover, students can understand electrical characteristics of sensor and transducer explicitly.
- The KL-720 contains nine modules, including Electrocardiogram Measurement, Electromyogram Measurement, Electrooculogram Measurement, Electroencephalogram Measurement, Blood Pressure Measurement, Photoplethysmogram Measurement, Respiratory Ventilation Detection, Pulse Meter and Body Impedance Detection.
- The sensors and transducers used in this equipment include pressure transducer, infrared photocoupler, strain gauge, temperature sensor and surface electrode.
- Each module has many test points for changing the frequency bandwidth and amplifier’s gain. Thus students can understand the correlation between physiological signal and each circuit stage.
So,
below are the pictures of the KL-75005 Blood Pressure Measurement Module:
Figure
2: Top View of the Blood Pressure Training Board
Figure
3: Back View of the Blood Pressure Training Board
I
had manage to redraw the PCB layout and I have to say it is not easy to trace
the PCB board as the lines are so fine and confusing...haha I would like to
thank my friend, Sharavanan Shanmugaratnam, for coming all the way from
Seremban just to assist me on the PCB layout tracing. Together we manage to
redraw the PCB layout faster, but it still took us 4 hours to accomplish
it...exhausting.....!! So here you go, the sketches done from the PCB tracing (Sorry
for the ugly hand drawing schematic) :p
Figure 4: BP Schematic diagram
So,
that is all on my progress for this week. Next, I will be working on the PCB
designing and PCB production for the Blood Pressure circuit. Wish me luck....!!
Hope to see you guys soon....Take care...
Tata.......................
<3
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Quote of the day....!
The future lies before
you, like paths of pure white snow. Be careful how you tread it, for
every step will show. ~Author Unknown
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Regards,
Idriah
Safriza Bte Idris Chin (',' )v
