Design And Implementation Of Embedded Remote Medical Care System Terminal

The problem of aging becomes more and more serious in recent years, the elderly and infirm often need a medical or long-term custody, while seeing a doctor for medical treatment delayed the optimal of many diseases. The rapid development of computer and network, made remote medical research be possible, and multinationals and research institutions are competing to carry out the research of telemedicine, and really made it used in lives of ordinary people. We designed remote medical care system based to provide convenience for old people, which has small size, low power consumption, and easy to carry. It can care physiological parameters at home for long time and reduce a lot of unnecessary trouble.Terminal of remote medical monitoring system in this research project is part of the whole system. The monitor terminal use ARM9microprocessor as its core controller and Linux operating system as its software development platform. The system includes blood pressure module, blood oxygen module, breathing module and ECG acquisition module, and it can acquit five physiological parameters including blood pressure, blood oxygen, breathing rate, peep and ECG. This paper discussed the implementation of hardware and software, and finally unified debugging.At the part of hardware, we designed blood pressure acquisition analog circuit. It translates air pressure signal into voltage signal by gas pressure sensor. Then we must send the voltage signal to AD processor after it been magnified and filtered. We main chips we use in this part are AD620AR and TL064. The power module supply different voltage for each module by a list of chip of LM. Breathing module adjusted the signal getting from force sensor to0-3V then send it to AD converter. The ECG module we designed provides seven different heart conductivity leagues.At the part of software, we designed the method of data analysis and the software program of blood pressure module and blood oxygen module. We gat each value at last. In addition, we designed the ADC driver module which can realize four channel sampling and data conversion. The whole software system designed the same interface for each sensor module by using modular structure, easy to management and increase or decrease module function. Finally we debugged each modules by contrasting test results and the traditional measuring data many times to adjust the defects of the hardware and software. Every result is good conforming to the standards at last. So far, we finished the whole system alignment. The system runs stably testing blood pressure, blood oxygen saturation, respiratory rate, pulse and electrocardiogram accurately. The system is basic expected to reach. The follow-up work is the design of the blood oxygen module’s hardware and the core processor. At the same time, we are considering increasing physical modules.