Research On Wireless Transmission Of Biomedical Signals Based On ARM And GPRS

With the continuous improvement of living standard, people are paying more and more attention to health care and physical examination. Traditional medical service can only serve the local people due to geographical restrictions, while telemedicine can provide prophylaxis, diagnosis, treatment and other services for remote patient through modern communication and computer technology, so telemedicine has attracted increasing attention nowadays. Wireless transmission of biomedical signals is an essential part of telemedicine. Through it we can not only accomplish remote monitoring, which means guiding the patient's treatment by remote detection of their physiological parameters (ECG, EEG, blood oxygen, glucose, etc.), but also can complete remote consultation, that is, the patient transmitting his text and image information to doctors for medical diagnosis, and doctors transmitting the result to the patient afterwards.This dissertation presents a wireless transmission system of bio-medical signal which can complete two major functions, remote monitoring and remote consultation. The system consists of a remote transmission terminal and a host computer. The implementation of the hardware and software of the remote transmission terminal is the major thrust of this paper.Firstly, the dissertation introduces the general design of the hardware and software of the remote transmission terminal. The hardware platform of remote transmission terminal is centered on Samsung's embedded microprocessor S3C2440A of 32- bit ARM, around which expanded with modules such as Huawei's GTM900-C GPRS module, RS-232 serial port, USB interface, SD card storage module and so on. The design and implementation of the said modules are elaborately discussed in the article. The operating system of Windows Embedded CE6.0 is transplanted to the terminal based on the hardware platform. The customization and transplantation procedure of WinCE6.0 is also introduced in detail.Secondly, both the embedded application based on WinCE6.0 and the PC software are developed by means of Visual Studio 2005. This paper has particularly introduces the wireless transmission of data and messages by use of GPRS module and the data storage by use of SQL Server CE3.0 as well as the human-machine interface of remote monitoring and remote consultation. In addition, the use of IOCP completion port to complete communication between Socket and GPRS modules and the use of RDA technology to realize remote synchronization between SQL Server 2000 and SQL Server CE3.0 are also specifically explained.Finally, the functional test and analysis of remote monitoring mode and remote consultation mode along with the test of the performance of GPRS wireless transmission are discussed. The wireless transmission system of bio-medical signal has satisfied the desired requirements for design by test.The wireless transmission system of biomedical signal developed in this project possesses the merits of simple to operate, user-friendly interface as well as high scalability and flexibility. It can accomplish real-time remote monitoring and remote consultation. Besides, the adoption of the embedded system design equips it with high reliability and real-time capacity.