Research On Intelligent Care System For The Elderly Based On NB-IoT

China is entering the aging stage,the number of elderly living alone is increasing,and the care of the elderly has become an important issue of social concern.Therefore,the establishment of an intelligent care system for the elderly has practical application value and social benefits.In the field of intelligent care for the elderly,GPRS / GSM remote communication mode and Zig Bee/Wi Fi short distance communication combined with wired network communication mode are relatively mature remote wireless monitoring schemes.The main disadvantage of GPRS wireless communication mode is high power consumption,and with the rapid development of 5G technology in China,it faces the risk of network withdrawal;although Zig Bee/Wi Fi technology is flexible,it needs to be combined with other communication technologies to realize remote monitoring.In addition,the above technical solutions need to build local or remote monitoring server to save monitoring data.In view of the above problems,this system based on NB-IoT technology and cloud platform,designed the intelligent care system for the elderly.The system can collect indoor environmental parameters,fire information and behavior information of the elderly in real time,and upload them to the cloud platform for storage.If abnormal data is detected,it will send out early warning information.The main work of this paper is as follows:(1)Completed the system architecture design,design NB-IoT intelligent nursing terminal hardware and software function program.The terminal node can real-time collect indoor environment data(temperature and humidity,smoke concentration,etc.)and detect the fire situation of the elderly living in the room,and collect the behavior information of the elderly.At the same time,it can set the threshold value through the sensor data to realize gas leakage detection and human intrusion detection;it can realize the fire detection function by using data fusion technology;it can analyze the behavior information of the elderly to judge the elderly Whether people fall or not,and use NB-IoT wireless transmission technology to upload data to the Internet of things platform regularly,which has the characteristics of longdistance transmission and strong practicability.(2)Based on Huawei Ocean Connect platform,NB-IoT intelligent gateway is constructed.By defining profile file and developing and deploying codec plug-in,data conversion function is realized,which provides a communication bridge between system terminal and application terminal.Meanwhile,Co AP protocol is adopted as the communication protocol between hardware terminal and Internet of things platform,which further reduces the power consumption of hardware terminal.(3)Based on MVC design pattern,using Servlet,JSP,Java Bean for server development,using HTML,Java Script,CSS for client page development.The functions of alarm notification and sensor node management are realized.The effectiveness of the fire detection algorithm and fall detection algorithm is verified by experiments,and the test results are consistent with the expectation.Through the test of each functional module in the terminal node,cloud platform and intelligent nursing platform,the feasibility of the function of the elderly intelligent nursing system and the stability of data transmission are verified,which provides a reference for the practical application and promotion of the system.