Design And Implementation Of Smart Home Security Alarm System Based On NB-IoT

With the development of modern information technology and the continuous improvement of social living standard.The demand of resident to household security also increases accordingly.In recent years,the security industry began to integrate and develop deeply with the home furnishing industry,the Internet industry and the communication industry.The traditional home security alarm system has some disadvantages,including: the network is unstable,the system power consumption is too large,the network wiring is cumbersome,the system is not easy to expand,the function is single,the intrusion detection is not accurate.On the basis of fully investigating the pain points of the development of home security industry,this paper designs a new intelligent home security alarm system and realizes it by combining the current emerging NB-IoT technology and YOLOv2 target detection algorithm.This paper makes use of NB-IoT network to work in authorized frequency band,low power consumption,deep coverage and other advantages,combined with the Internet of things cloud platform developed by operators,to overcome the defects of the original system network.The system designed in this paper includes three parts:terminal perception node,cloud platform and client APP.According to the requirements of home environment,the paper enriched the types of terminal nodes.With the STM32 MCU and Raspberry PI,the paper realized the three functions of environment awareness,fire prevention and intrusion detection.The target detection algorithm YOLOv2 is used to identify the intrusion subject.Through investigation and comparison,the OneNET cloud platform of the Internet of things of China mobile was selected to realize the support of system data storage,push and command issuance,and the client APP was developed based on the Android OS operating system to realize the timely receipt of warning data and remote command issuance of users.Through research and analysis,system design,and development,the construction of NB-IoT based intelligent home security and alarm system is realized.The data uploaded by the terminal sensing device is synchronously connected and visually displayed on the cloud platform and the client APP.The paper tested the system,Through the analysis of the test results,verify that the anticipated functions of the system are fully realized and meet the requirements of the system.It can be based on theoperator network.At the same time,it has the reliability and stability of household environment application.