A wireless telemedicine monitoring system based on GPRS technology is introduced. With SPCE061A as the main control chip, the data acquisition module and the GPRS communication module are combined to connect to the Internet in a wireless manner, and the monitoring center receives the data and saves it to the database. The LabVIEW tool is used to design and process the main panel of the monitoring center server, to realize the remote monitoring, analysis and abnormal situation judgment and alarm of the patient's physiological parameters. The overall structure of the system is expounded, and the design and implementation methods of the system are explained from two aspects of hardware and software. The system has a simple structure, strong real-time performance, large amount of data transmission, and has a good application prospect in the field rescue of the wounded and sick in natural disasters and wars.
Telemedicine monitoring is a medical model that uses telematics and computer technology to achieve long-distance medical functions such as disease diagnosis, disease treatment, and health care. It monitors vital vital signs parameters of patients in real time, continuously and for a long time, so that medical staff can know the patient's status in order to make correct judgments and treatments, in the custody, war and natural disasters of patients with sudden and dangerous diseases. The rescue and rescue fields of the wounded and sick have an important role. At present, remote monitoring is mainly based on telephone network, Internet and wireless communication network. Due to the wide coverage of mobile communication network and low operating cost, combining wireless communication technology with Internet technology has become a hot spot in wireless telemedicine monitoring research. In order to realize the characteristics of low cost, miniaturization and mobility, the system design uses SPCE061A as the main control chip, and combines the acquisition module with the GPRS (General Packet Radio Service) communication module to realize the wireless transmission of physiological parameters. The data is transmitted to the monitoring center located in the central hospital through the wireless network, and the advanced medical technology and expert team of the central hospital are used to ensure that the patients are treated in a timely, effective and professional manner in and out of the hospital.
1 Overall structure of the monitoring system
The system design consists of intelligent monitoring terminal, GPRS communication module (GPRS network), Internet public network, data server, hospital local area network and hospital monitoring center. The block diagram is shown in Figure 1. The server of the monitoring center is in a listening state at any time, and responds to the connection request and the read request sent by the user in real time, and establishes a connection with the server. The intelligent monitoring terminal can be applied to the home, ambulance, disaster relief or war emergency site to collect, process, display and transmit the physiological parameters of the patient. In the ambulance, disaster relief or war emergency scene monitoring terminal, the GPRS module is used to connect to the Inteenet wirelessly; the community and affiliated hospitals connect to the Internet through independent Internet access or wirelessly; in the central hospital, the data is transmitted by the hospital's local area network. The monitoring center and the monitoring center experts conduct statistical observations on the data to timely diagnose and provide treatment guidance for the patient and realize telemedicine.
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2 hardware design of the monitoring terminal
The monitoring terminal takes the ECG acquisition module as the core, and expands peripheral devices such as blood pressure measurement OEM module, blood oxygen saturation OEM module, large-capacity FLASH memory and wireless transmission GPRS module. Among them, the ECG acquisition module uses 16-bit SPCE061A single-chip microcomputer as the control chip, and expands the preamplifier circuit, the filter circuit, the power frequency trap circuit and the ECG lead. SPCE061A is a microcontroller with speech processing μ'nspTM structure introduced by Taiwan Lingyang Company. It adopts Soc framework, and the chip has hardware multiplier, which can realize complex operations such as multiplication and inner product. CPU clock is 0.32 ~ 49.152 MHz (2.4 ~ 3.6 V); built-in 2K word SRAM and 32 K word FLASH; 32-bit programmable multi-function I / O port; 14 interrupt sources; 16-bit timer/counter; programmable audio processing; 7-channel 10-bit voltage analog-to-digital converter; dual-channel 10-bit DAC audio input function, only need external amplifier to complete voice playback, convenient to realize the system's voice function.
The monitoring terminal completes the collection and processing of physiological signals on the one hand, and on the other hand, it is sent to the GPRS module, and the single-chip microcomputer is used to control the startup, connection, mode conversion, etc. of the GPRS module, and will be encrypted and fault-tolerant in the data mode. The data is sent to the monitoring center server in real time to implement system functions. The hardware structure is shown in Figure 2.
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