Design And Implementation Of GPRS-based Remote Medical Monitoring System For Home Applications

With the development of society and technology, aging and the improvement of life, great changes have been developed with people’s health attitudes. Medical care concept has turned from conventional medical treatment of illnesses to illness prevention and health care. Thus, Home Health Care (HCC) services have emerged, which advocates medical care is at home. With advanced and appropriate medical instruments being equipped, custody, diagnosis, health recovery and health care can all be offered to the patient at home. On the other hand, tele-medicine has become an indispensable part of human life as the developing of Internet technology. It can transmit medical information (biological parameter) of a patient to a distant doctor and gains health care guidance or even emergency rescue at home.This paper presents the design of a multi-parameter remote medical monitoring system based on embedded uC/OS-II and GPRS family, and it mainly introduces the hardware and software design and how to realize teamwork between hardware and software. The main work and contributions of the paper are as follows:(1) According to the thorough investigation and analysis, this paper presents the overall design of the home remote monitoring system and its build target. The dissertation carried out a detailed demonstration program, and come to the ARM-based embedded processing platform STM32and embedded real-time operating system uC/OS-II which is appropriate for the system design of the program.(2) The dissertation chooses the NTC thermistor as the body temperature sensor. According to the calibration experiments we get the calibrate data. The NTC thermistor resistance-temperature characteristics curve can be obtained while using the least squares method and the calibrate data. Compared with the medical thermometer, the measurement accuracy of the temperature module is in±0.1℃, which correspond to the standards of accuracy of the temperature measurement.(3) The dissertation completes the circuit design of ECG module to amplify the ECG signal and eliminate noise interference. Combine with the digital filtering method of the research group, the ECG module can achieve the ECG extraction, amplification and filtering functions and the ECG waveform performs well.(4)Combined with the oxygen and blood pressure module developed by the research group, the dissertation design the collection algorithm and the software can be successfully resolved and obtain the correct oxygen and blood pressure data.(5) To achieve multifunction, multitask and multithreading requirements of the system, the software development is in process after uC/OS Ⅱ operating system is transplanted. In this part of the work, how to transplant the file system FATFS, graphical user interface uC/GUI, and the design of the remote communication protocol based on GPRS are presented. The results shows that the telemedicine monitoring system developed in this work can reach the design requirements in terms of functionality, performance and stability.