Journal of the Korea Academia-Industrial cooperation Society (한국산학기술학회논문지)

The Korea Academia-Industrial cooperation Society (한국산학기술학회)
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Development of a Portable Digital Electrocardiograph(ECG) measurable with Gel-less Metal Electrodes

젤리스 금속 전극으로 측정가능한 휴대용 디지털 심전도계의 개발

  • Nam, Young-Jin (Department of Electronics Engineering, SoonchunHyang University) ;
  • Park, Kwang-Min (Department of Electronics Engineering, SoonchunHyang University)
  • 남영진 (순천향대학교 전자공학과) ;
  • 박광민 (순천향대학교 전자공학과)
  • Received : 2012.11.22
  • Accepted : 2013.04.11
  • Published : 2013.04.30
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Abstract

Heart condition should be observed for long periods of time because it does not appear abnormal all the time. However, there are many difficulties checking our health for a long time due to its size, operation of equipment, and cost. To solve these problems, an electrocardiograms(ECG), specially interfacing three gel-less metal electrodes for low cost portable applications, is designed and implemented. Gel-less metal electrodes are used for ECG monitoring system instead of gel-type electrodes that can cause skin rashes and itching problem. The whole ECG system consists of two parts-analog and digital circuits. The analog measurement circuit that has a 18*25mm size is made up of op-amps maintaining a sufficiently high common-mode noise rejection and passive elements of SMD type. Analog heart signal is converted to digital stream suitable for display on a TFT-LCD by an 8-bit microcontroller. The size of the completed ECG system is 25*80*50mm and its weighing is about 150g, which is small enough to be easily used. Therefore, the implemented ECG system can be used as a portable one.

심장 질환의 이상 현상은 항상 나타나는 것이 아니므로 오랜 시간 동안 심장상태를 관찰해야 한다. 하지만, 의료장비는 크기, 장비 조작, 비용 면에서 개인이 소유하여 장시간 동안 건강 체크를 하기에는 어려움이 있다. 본 논문에서는, 젤리스 금속 전극으로 측정 가능한 휴대용 디지털 심전도계를 제작하였다. 전극은 기존의 젤 타입 전극 대신 젤리스 금속 전극을 사용함으로써 기존 젤 타입 전극의 단점이었던 피부발진 또는 가려움증 유발 등의 문제점을 개선하였다. 전체 심전도계는 크게 아날로그 계측 회로부와 디지털 회로부로 구성하였다. 아날로그 계측 회로부는 동상모드 잡음을 효과적으로 제거할 수 있는 op-amp와 smd타입의 수동소자를 사용하여 18*25mm 크기로 설계 및 구현하였다. 디지털 회로부에서는 마이크로 컨트롤러를 이용하여 아날로그 신호인 심장신호를 디지털 신호로 변환하여 TFT-LCD에 디스플레이할 수 있도록 하였다. 완성된 휴대용 심전도계의 크기는 25*80*50mm이고, 무게는 약 150g 정도로써 가볍고 휴대하기 용이하게 소형으로 제작하였다.

Keywords

References

  1. Korea Food & Drug Administration, "A Guideline Development of Performance evaluation and licensing review of U-healthcare medical device", Available Form: http://www.newswire.co.kr/newsRead.php?no=507614&ected=, (accessed May., 10, 2012)
  2. Jun-Heum Hwang, Se-Jin Kim, Do-Un Jeong, "Implementation of the ECG and Plethysmograph Monitoring System for Home Healthcare" Proceedings of the Korean Institute of Information and Communication Sciences Conference A, pp. 662-665, May. 2008
  3. Dae-Seok Lee, Sachin Bhardwaj, and Wan-Young Chung, "An u-healthcare system using an wireless sensor node with ECG analysis function by QRS-complex detection", Journal of the Korean Sensors Society, Vol.16, No.5, pp. 361-368, Sep. 2007. DOI: http://dx.doi.org/10.5369/JSST.2007.16.5.361
  4. Myeong-Kil Song, Kwang-Min Park, "Design and Implementation of a 9V Mini-Electrocardiograph(ECG) system", Journal of the Korea Academia-industrial cooperation Society, Vol.9, No.5, pp. 1130-1133, Oct. 2008. https://doi.org/10.5762/KAIS.2008.9.5.1130
  5. Ilkka Hokajarvi. "Electrode contact Impedance and Biopotential signal quality", Master of Science Thesis, pp13-14, Jul. 2011
  6. Pereira, C.D.M., Mendes, P.M., "Development of a two-electrode ECG acquisition system with dynamic interference rejection", ENBENG 2011. 1st Portuguese Meeting, pp. 1-5, Nov. 2011.
  7. Do-Chang Oh, Dong-Hyuk Choi, and Hong-Woo Lee, "Portable ECG Sensor Module and Monitoring System Implementation Considering Reduction of Powerline Noise and Baseline Wander", Journal of Institute of Control, Robotics and Systems, Vol.12, No.10, pp. 1022-1028, Oct. 2006. https://doi.org/10.5302/J.ICROS.2006.12.10.1022
  8. Harri Kailanto Esko Hyvarinen and Jari Hyttien, "Mobile ECG Measurement and Analysis System Using Mobile Phone as the Bass station", Pervasive Computing Technologies for Healthcare, Second International Conference, pp. 12-14, Feb. 2008.
  9. Walker, B.A., Khandoker, A.H., Black, J., "Low cost ECG monitor for developing countries", Intelligent sensors, Sensor Networks and Information Processing (ISSNIP), 5th International Conference, pp. 195-199, Dec. 2009.