The Desigh And Implementation Of Wearable ECG Monitor Device Based On Bluetooth 4.0 Technology

As China has gradually entered the aging society, a high incidence of heart disease has become a trend. However, current medical conditions and test environment limits the potential for early detection of heart disease. Patients with heart blood vessel blockage and heart attack must open up clogged arteries in an hour, so as not to cause permanent damage to the heart muscle, if not timely access to appropriate treatment, the blockage of blood vessels leading to myocardial necrosis. Therefore, early detection of heart disease and prevention are urgent needs of today’s society. In recent years, with the rapid development of embedded software and hardware technology, intelligent wearable medical devices are increasingly of concern. The design and development of portable, wearable ECG acquiring system has become the common goal of industry and academia. This paper designs and implements a low-power Bluetooth wearable ECG acquisition and display system based on existing ECG signal processing technology. The miniature ECG node, quickly built via off-the-shelf hardware platform, is capable of accurately sampling ECG signal from the electrodes and displaying data to the portable devices.Firstly, this paper studies the mechanism of the ECG, pathological significance of ECG electrocardiogram conduction process and features of ECG waveform via analyzing the characteristics of the body surface ECG. Meanwhile, this paper presents the distribution and origin of the ECG noise and the electrode deployment methods as well. Secondly, the ECG signal acquisition and conditioning circuit is detailed presented. A specific pre-amplifier and filter circuit development are also illustrated, in which the amplifier factors and parameters are determined through theoretical analysis and calculation. Thirdly, this paper designs and implements Android based Bluetooth communication software. By deeply studying of ECG data characteristics, the design of the data transfer protocol, and detailed analysis and validation are presented, as well as the supporting embedded codes; Finally, the prototype ECG acquisition node with miniature size and low complexity is presented. Also, the simple and reliable positioning and extraction of characteristic waves are tested and validated through simulation and real environmental experiments. The results shows the effectiveness and feasibility of our wearable ECG system which can provide effective technical support for wearable ECG system development.