(1) With the intensification of environmental pollution, changes in people's living habits, and increased work pressure, new conditions have emerged for diseases that threaten human health. Malignant diseases and chronic diseases such as cardiovascular diseases, cerebrovascular diseases and malignant new organisms have become the number one killers threatening human health.
(2) With the improvement of living standards and the improvement of medical and health conditions, human life expectancy has been prolonged, and the trend of aging is very obvious.
(3) The development of modern communication technology, especially the rapid development of mobile communication technology and Internet technology, provides strong technical support for remote monitoring.
This new telemedicine model is a very important technology and has many advantages. First of all, he greatly facilitates the majority of patients, especially some special groups, such as disabled patients with disabilities and chronic elderly people, pregnant women and children who need regular examinations, and chronic patients who need to go to the hospital for long-term review (such as Diabetes, heart disease patients), patients away from hospitals with inaccessible traffic, etc. Secondly, this new telemedicine model also effectively reduces the workload of hospital outpatient clinics, allowing hospital outpatient clinics to focus on critical illnesses and incurable diseases, effectively allocating and using limited medical resources, and for cities with tight life and tight time People provide a family medical care anytime, anywhere. People can move freely with wireless sensor devices, and can monitor their physiological parameters at all times in a familiar environment without going to the hospital. He can not only assist the treatment, but also call the police when the patient's condition suddenly deteriorates. Medical staff can observe the patient's health status in the remote monitoring center and provide real-time diagnosis and advice, and can also monitor the patient for a long time. On the other hand, the remote monitoring of healthy people can also find the early symptoms of the disease, so as to achieve the purpose of health care and disease prevention.
This article designs a new network monitoring device and system. Based on wireless sensor network technology, the sensor collects various health parameters of the human body. These analog signals are processed by the front-end circuit, input to the microcontroller in the form of digital signals, enter the PC through wireless data transmission and computer universal serial bus interface, and are sent to the remote monitoring center from the Internet to provide professional medical personnel with a variety of Changes in important physiological parameters. Then it will make statistical observations on the data, provide necessary consulting services, and realize telemedicine. The purpose is to use the high-frequency wireless multi-channel data transmission method to transfer the information between the medical sensor and the monitoring control instrument, reduce the connection between the monitoring device and the medical sensor, so that the guardian can have more free movement space.
2 System structure
The family-oriented remote health monitoring medical system is mainly composed of 2 parts: a remote medical instrument sensing system and a communication delivery system. The function of the remote medical instrument sensing system is to collect the user's physical condition data. As a networked home physiological monitoring physiotherapy device, the remote monitoring system must be stable and reliable, have a certain self-check function, and be simple to operate. From the perspective of patient safety, mature and reliable technology should be used as much as possible, and as much as possible to be compatible with the existing system and share data, and expand as needed. The communication technology provides strong technical support for the realization of telemedicine. Depending on the amount of information transmitted in telemedicine applications and the real-time requirements, different communication technologies may be used. In this article's family-oriented health monitoring system, wireless sensor network data transmission is the main connection between various monitoring devices and computers and remote backbone communication networks. Compared with wired transmission, his advantages are:
(1) It has a fast enough speed to meet the data transmission needs between devices;
(2) It has good scalability, and the increase or decrease of equipment in the system will not affect the use of other equipment;
(3) It has good adaptability, convenience and mobility, and is not constrained by the physical environment.
The monitoring system designed in this paper is composed of a monitoring base station and a sensor node to form a mini monitoring network; the sensor node collects data on various life indicators of the user, sends the data to the monitoring base station through wireless communication, and the base station transmits the data to The connected PC can transmit the data to the remote medical monitoring center through the Internet network, and the professional medical personnel can make statistical observations on the data and provide the necessary consulting services to achieve remote medical treatment.
Users can also conduct a preliminary analysis of the collected data through a personal PC, and take emergency measures through a preliminary judgment given by the computer. Medical biosensor nodes can be set according to different needs, so the system has great flexibility and scalability. At the same time, connecting the system to the Internet network can form a larger community medical monitoring network, hospital network and even the whole city and the whole country. Figure 1 is a structural diagram of the system.
3 Design of monitoring sensor node and monitoring base station
The sensor node is used to measure physiological parameters, and the acquired data is transmitted to the base station through the wireless sensor network. The sensor nodes required by the network can be expanded as needed. Figure 2 is a block diagram of a sensor node blocker node. It consists of a sensor, a signal conditioning circuit, a processor, and a wireless communication module. The wireless communication module is the key to realize wireless monitoring.
The base station unit can collect and display the data information obtained by the test, and can alarm the abnormal situation. If necessary, the data will be automatically sent to the remote monitoring center, seeking medical advice and help. Therefore, the monitoring base station device in this system is designed as a portable device, and at the same time, the monitoring base station device can communicate with multiple sensor nodes in the system to complete functions such as data collection and display. During use, the monitoring base station device sends a control command to the sensor node through a wireless channel to start the sensor node. After receiving the command, the sensor node performs corresponding data collection actions to collect human physiological index data. After the collection, the data is collected by wireless communication. Returning to the monitoring base station, the monitoring base station performs further operations such as display and storage. The main components of the base station include user interaction interface module, wireless communication module, alarm module and data transmission module. The communication method with the remote monitoring center can be selected according to application needs and network construction. Fig. 3 is a block diagram of a base station.
The wireless communication module mainly completes the data interaction with the sensor nodes. The base station can be connected to the local computer through the serial port, USB interface and network adapter, and then transmitted to the remote monitoring center through the Internet. The monitoring base station equipment uses batteries for power supply in the normal working state, so special attention is paid to the management and control of low power consumption during the design process. When not working, the system will enter a low power consumption and sleep state to save system energy.
4 Design of user self-diagnosis system
In this system, the PC is not only a tool that is responsible for customers logging into the web server and communicating with doctors in real time. He also took a very important job, namely providing a self-diagnosis information database and realizing self-diagnosis service functions for users.
The main function of the diagnostic system is to perform a preliminary analysis of the data collected by the sensor before sending the data such as body temperature, pulse, and blood pressure to the hospital. After performing a set of signal processing analysis on the data and calculating the corresponding human body information data, determine whether to send the data by judging the obtained human body data, and the diagnostic software on the user side also provides similar and expert systems The function of the white diagnostic function is provided to the user for reference. 4 is a flowchart of a self-diagnosis analysis system.
Remote monitoring uses sensor technology and modern communication technology to extend the patient's monitoring range from within the hospital to any place where the communication network can reach, so as to realize the transmission of medical information between patients and clinics, clinics and hospitals or hospitals. Remote monitoring provides a method for studying the physiological functions of remote objects by continuously monitoring the physiological parameters of the monitored person. He shortens the distance between the doctor and the patient. The doctor can provide patients with timely information based on the physiological information transmitted from the remote Medical services, the remote monitoring system can not only improve the quality of life of the elderly, but also can timely capture the morbidity of the elderly, combined with the remote monitoring of important physiological parameters, can improve the home care level of the elderly. This is of great significance for patients to obtain high-level medical services and first aid support in emergencies. The remote monitoring system is produced and developed in compliance with the development of the information society and people's demand for medical care. With the continuous development of information technology, its forms will be more diverse, and the miniaturized wireless intelligent sensor network combined by wireless, mobile and sensor technologies will surely bring new breakthroughs to the development of remote monitoring systems.
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