With the advance of the technologies of computer and information, telemedicine has been developed quickly. This new medical pattern has been attracting more and more people’s attention in the world. The research in this field was been done later in China than in others. But some good results have been achieved so far. Up to now, generally speaking, in China, due to the limits of the internet covering area and relatively lower living standard, many people can not enjoy the telemedicine service. In Chinese market, one kind of this products is based only on the internet as transmit medium. It can not widely applied by the ordinary people. Another kind is based on telephone line which is covering almost the whole country. The drawback of this kind of products is the poor function and the limited storage, which can not supply enough clinical information.
Aiming at the problems described above, this thesis has discussed deeply the technologies of transmission, storage and so on. Based on the research results, a family used multi-physiological-signal monitoring system was developed. It can realize sampling, recording, and transmitting for electrocardiogram(ECG), oxygen saturation and respiration.
The system utilizes the telephone line, which is covering almost the whole country, as communication media. A 56k high speed modem and an own protocol is employed for real-time mass data transmission. At the same time, personal computer is used as the system’s enhanced part to extend its application. The internet data exchange plays the second way of communication of the system. In order to simplify operation of terminal device, Universal Serial Bus(USB) mass storage function has been realized in it. Users can conveniently deal with the recorded data files of terminal device in personal computer as their wills. Additionally, because the flash memory on the terminal device exists some bad blocks, we make use of the concept of address mapping technique to shield the bad block for software development, which simplifies programming and makes the whole firmware more transplantable.
The system in this thesis overcomes some shortages of nowadays telemedicine monitoring system in the market. It has flexible communication ways and simple operation. It can be used for different users.
Keywords: Telemedicine, Physiological Signal, Telephone Line, Universal Serial Bus, Address Mapping
Thesis Type: Applied Fundamental