Design and Realization of Portable ECG Monitor with Dual CPU

Abstract:

In order to meet data acquisition mobility and convenient requirements of the portable ECG monitor, the data acquisition system of ECG with dual CPU is designed in this paper. The system, in which C8051F005 is master CPU, meanwhile ATmega168 is slave CPU, consists of analogical circuit for detecting of ECG, amplifier-filter circuit, A/D converter and SD memory card communication interface mainly. Experimental data shows that the system has such advantages such as good repeatability, high accuracy, quick response and excellent anti-interference. It can effectively detect and obtain electrical activity of the heart and cope with continuous large memory with SD memory card in embedded system. Strong background noises are eliminated effectively by multi-level amplifier and filter; Un-anamorphic ECG can be acquired and recorded synchronously in memory cards. Moreover, this paper also proposes a preprocessing algorithm for noise reduction so that it can reject the interference by respiration and surface EMG signal.

• Periodical: Advanced Materials Research (Volume 340)
• Pages: 451-455
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.340.451
• Online since: September 2011
• Authors: Fang Yang, He Ping Hang, Jin Hui Shen, Ming Gang Shao
• Keywords: Data Acquisition (DAQ), ECG, Embedded System, SD Card

References

[1] ECG- simplified. Aswini Kumar M. D,. LifeHugger. http: /www. lifehugger. com/doc/120/ecg-100-steps. Retrieved 2010-02-11.

[2] Mark JB Atlas of Cardiovascular Monitoring., p.130. New York: Churchill Livingstone, 1998. ISBN 0-443-08891-8.

[3] Degeng Gen, Principle and Application of AVR Embedded MCU, Press of Beihang University, Beijing, (2003).

[4] Silicon Laboratories. C8051F005 Datasheet, www. silabs. com.

[5] Pasco Pasport EKG Sensor PS-2111, Sciencescope ECG Sensor, etc.

[6] Analog Devices. Low Cost, Low Power Instrumentation Amplifier AD620, www. analog. com.

[7] Schematic diagram of normal sinus rhythm for a human heart as seen on ECG, 13 January (2007).

[8] Bert-Uwe Köhler, Carsten Hennig, Reinhold Orglmeister The Principles of Software QRS Detection, p.42. IEEE ENGINEERING IN MEDICINE AND BIOLOGY, (2002).

[9] Frank Y. Shih, Christopher C. Pu. Analysis Properties of Soft Morphology Filtering Using Threshold Decomposition,. IEEE TRANSACTIONS ON IMAGE PROCESSING, 1995: 4(3): 335~345.

[10] Kunt M, Rey H. Preprocessing of electrocardiograms by digital techniques. Signal Processing, 1982, 4(1): 215-222.

DOI: 10.1016/0165-1684(82)90023-8

[11] Keselbrener L. Nonlinear high pass filter for R-Wave detection in ECG signal,. Med. Eng. Phys. 1997, 19(5): 481-484.

DOI: 10.1016/s1350-4533(97)00013-1