| Heart disease has always been hard to overco me diseases, is one of the major diseases threatening human life and health.As people living standard unceasing enhancement, is also in constant speed up the pace of life, and more and more pressure of life and work pressure leads to the increasing incidence of heart disease.To protect patients can get accurate treatment in the first time, real- time ECG monitoring has become a major means of the hospital diagnosis in patients with heart disease as well as the important basis.But greatly contingency and sudden heart disease, with only an EC G detection and can better reflect the people health.So the traditional large EC G monitoring system in terms of volume and practical already cannot satisfy the development trend of the future.Holter(dynamic electrocardiogram) while can for a long time monitoring, but the lack of timeliness and convenience.Aiming at the shortcomings of the existing ECG monitoring system, this paper introduced the concept of intelligent, study a Holter system based on Android mobile phones.S ystem usage ARM11 development board S3C6410 microprocessor as the core, through the EC G signal acquisition, storage, A/D conversion, and sends the data to the wireless function Android mobile phone platform for doctors and patients.The main complete content is as follows:First learning the basic knowledge of ECG signal, to master the principle of its produce, electrocardiogram(ECG) in the meaning of each band, analyzes the main interference sources and electrocardiogram measurement is difficult, and set t he measurement standards and design requirements of ECG signal and the overall design of ECG monitoring.And solve the problem of the three core of dynamic Holter system: ECG signal acquisition, ECG signal processing and information release.For these three core part, first of all EC G extraction circuit is designed.It is given priority to with LM324 chips completed input protection circuit and buffer circuit, using the operational amplifier AD620 chips completed the first stage amplifier circuit design, and design the right leg drive circuit, filter circuit and trap circuit to filter out other signal interference.At the same time we designed a patch of detection module, to prevent distortion caused by measurement data when the patch falls off.After finished the ECG extraction part, we also need to convert the analog signal to digital signal.base on mini6410 platform, usage S3C6410 for the microprocessor finished the processing part of ECG signal, and its ECG signals to FAT file format stored in SD card.The most can reflect the state of the heart due to the ECG waveform for R wave, R wave as soon as possible after baseline drift will affect the doctor’s diagnosis, thus designed the algorithm, using the difference of amplitude frequency characteristics of R wave to strengthen.Usage GC- 02 bluetooth module, the ECG data transmitted in Android mobile phone, and design the Android client receive ECG data, to display ECG signal.Finally on Holter system based on Android system has been tested, and has carried on the system optimization, aimed at the problems existing in the experimental results show that the system can better achieve signal acquisition, processing and function of information release, prove the feasibility of the system. |
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