Journal of the Institute of Convergence Signal Processing (융합신호처리학회논문지)

The Korea Institute of Convergence Signal Processing (한국융합신호처리학회)
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Implementation of PTT Change Monitoring System According to Exercise Intensity

PTT기반 운동 강도 모니터링 시스템 구현

  • Lee, Ji-Su (Division of Computer Engineering, Dongseo University) ;
  • Kim, Dong-Chan (Division of Computer Engineering, Dongseo University) ;
  • Lee, Gyeong-Tack (Division of Computer Engineering, Dongseo University) ;
  • Kim, Gyeong-Seop (Division of Computer Engineering, Dongseo University) ;
  • Noh, Yun-Hong (Department of Computer Engineering, Busan Digital University) ;
  • Jeong, Do-Un (Division of Computer Engineering, Dongseo University)
  • 이지수 (동서대학교 컴퓨터공학부) ;
  • 김동찬 (동서대학교 컴퓨터공학부) ;
  • 이경택 (동서대학교 컴퓨터공학부) ;
  • 김경섭 (동서대학교 컴퓨터공학부) ;
  • 노윤홍 (부산디지털대학교 컴퓨터공학과) ;
  • 정도운 (동서대학교 컴퓨터공학부)
  • Received : 2020.02.10
  • Accepted : 2020.03.20
  • Published : 2020.03.31
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Abstract

Cardiovascular disease is the leading cause of death worldwide and is caused by a variety of causes. The highest risk factor for cardiovascular disease is high blood pressure, which has no obvious symptoms, but if left untreated, it causes several complications. In order to treat hypertension, medication and regular exercise are required. In people with high blood pressure, excessive physical activity can put a great strain on the heart and lead to cardiovascular disease. Therefore, there is a need for an exercise intensity monitoring system through PTT measurement that can perform exercise at an appropriate intensity. In this study, we implemented a PTT change monitoring system according to exercise intensity by calculating PTT through ECG and PPG measurement. The implemented system differentiates the R-peak of the ECG and P-peak of the PPG, and calculates the PTT using the time difference between R-peak and P-peak. A running experiment was conducted to monitoring PTT change according to exercise intensity. As a result of the experiment, low intensity PTT is 0.313s, moderate is 0.220s, high is 0.188s, it was confirmed that the PTT decreased as the exercise increase increased.

심혈관질환은 전 세계 주요 사망 원인으로 다양한 원인에 의해 발생한다. 심혈관질환의 가장 높은 위험인자는 고혈압으로 뚜렷한 증상이 없지만 방치할 경우 여러 합병증을 유발한다. 고혈압을 치료하기 위하여 약물치료와 규칙적 운동을 진행해야한다. 고혈압 환자의 경우 과도한 신체 활동 시 심장에 큰 무리가 발생해 심혈관질환으로 이어질 수 있다. 따라서 적정 강도로 운동을 진행할 수 있는 PTT 계측을 통한 운동 강도 모니터링 시스템이 요구된다. 본 연구에서는 심전도와 맥파 계측을 통해 PTT를 산출하여 운동 강도에 따른 PTT 변화 모니터링 시스템을 구현하였다. 구현된 시스템은 심전도의 R-peak와 맥파의 P-peak를 미분하여 peak간의 시간차를 이용하여 PTT를 산출한다. 운동 강도에 따른 PTT 변화 모니터링을 위하여 달리기 실험을 진행하였다. 실험결과 저강도는 0.313s, 중강도는 0.220s, 고강도는 0.188s의 PTT가 측정되었으며, 운동 강도가 증가함에 따라 PTT는 감소하는 것을 확인하였다.

Keywords

Acknowledgement

본 연구는 교육부의 재원으로 한국연구재단의 지원을 받아 수행된 기초연구사업(No.2018R1D1A1B07045337)의 결과물임을 밝힙니다.

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