1. Dept. of Biomed. Eng.BME302: Medical InstrumentationKyung Hee Univ. 1Park Jun-hwan Medical Instrumentation #8 제출일 : 2014. 05. 13. 생체의공학과 2010103789 박 준 환 Digital Signal Processing, Digital Filter, QRS detector

2. Dept. of Biomed. Eng.BME302: Medical InstrumentationKyung Hee Univ. 2Park Jun-hwan 1. Digital Signal Processing 1) 심전도의 출력과 QRS 검출 LA RA RL Amp +-+- ADC uP sensor Analog Signal Processing Digital Signal Processing Output * 12bit ADC * 200Hz : 아래 파형의 12bit data 가 5ms 간격으로 들어옴 * Heart rate 표시 * : 전극이 떨어지면 LED on, Sound 출력 ( 삐 - 삐 -) * : QRS 가 나오지 않으면 LED on, sound 출력 ( 삐삐 - 삐삐 -) * : QRS 발생할때 마다 LED 깜 빡 sound ( 삣 - 삣 -) 80 bpm Keypad

3. Dept. of Biomed. Eng.BME302: Medical InstrumentationKyung Hee Univ. 3Park Jun-hwan 1. Digital Signal Processing 2) DSP-Programming * 언어 : C language(Firmware 생성 : uP 에서 돌아가는 Program) * 예시 ( 기본적인 형태 ) ……… Main(){ initialize(); // uP 내 정보 초기화, 사용목적에 따라 변수와 기능 조절 While(1) // 꺼질 때 까지 계속 Program 수행 { d=get_ECGdata(); l=get_Contact_data(); QRSdetection(); // 논문 참고 ( 다음시간 ) Update_Display(); Respond_To_user(); // 사용자 입력에 대한 반응 alarm(); // 알람기능 추가시 사용 Senddata(); }

4. Dept. of Biomed. Eng.BME302: Medical InstrumentationKyung Hee Univ. 4Park Jun-hwan 2. Digital Filter * Raw Data X(t) x[n] x[n-1] nTs [n-1]Ts 0 t X(n) Sampling X[n] H[z] Y[n]

5. Dept. of Biomed. Eng.BME302: Medical InstrumentationKyung Hee Univ. 5Park Jun-hwan 2. Digital Filter * FIR Filter * IIR Filter

6. Dept. of Biomed. Eng.BME302: Medical InstrumentationKyung Hee Univ. 6Park Jun-hwan 2. Digital Filter

7. Dept. of Biomed. Eng.BME302: Medical InstrumentationKyung Hee Univ. 7Park Jun-hwan 2. Digital Filter

8. Dept. of Biomed. Eng.BME302: Medical InstrumentationKyung Hee Univ. 8Park Jun-hwan 3. QRS detector 1) Low-pass Filter x[0]x[1]x[2]……x[10]x[11]x[12]x[13]x[14]x[15]……x[23]x[24]x[25]

9. Dept. of Biomed. Eng.BME302: Medical InstrumentationKyung Hee Univ. 9Park Jun-hwan 감사합니다.