MEDICAL INSTRUMENTATION. Fifth Homework 동서의료공학과 2005200444 정 진 웅
Chapter. 7
P P 1. Tonometry M constant area = A - describe a principle (earth) f = Mg M P P (earth) (earth) The volume is not changed. So, pressure inside a ball is getting higher for a balance force per unit area
LED Air jeet Eye ball Photo sensor Photo diode Photo TR
2. NIBP Cuff pressure Cuff Attach a stethoscope
※ Basis of circulation
“NIBP only measure the value of Measuring with IBP Pa 120mmHg 90mmHg t << arterial pressure >> “NIBP only measure the value of a S.P. and D.P.
※ A process of making product ① Specification ② Circuit design simulation ③ Cad : schematic (ex. Or-cad, Cadence) ④ Cad : layout ⑤ Making a PCB ⑥ Making a components ⑦ Test / Debugging
this sound signal with HPF A principle of NIBP(“Oscillometric methoud”) P sound Cuff pressure 120 mmHg Then, We process this sound signal with HPF 80 mmHg We can hear a interval beat sound No sound (Decompression mode NIBP) T
※ Output, processed with HPF A noise remained after HPF T
“the accuracy is very low. ※ To contrast with Decompression mode NIBP P 120 mmHg 80 mmHg Cuff pressure T (Pressure mode NIBP) “the accuracy is very low. so, not popular”
※ Matlab
나름대로 해봤는데 옳게 나온거 같지는 않는거 같습니다. 50Hz를 넣고 80+(40sin(2. pi. t)). sin(100 나름대로 해봤는데 옳게 나온거 같지는 않는거 같습니다. 50Hz를 넣고 80+(40sin(2*pi*t)).*sin(100*pi*t)하고 해서 될꺼같은데 계속 모든 성분이 80로 나오네요.. 유효숫자때문인거같은데… 문제무엇인지 여쭤봅니다..
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