An Application About Internet Of Things For Current Detection

Possession of large equipment increase rapidly in University Laboratory,and it exists the circumstances of low use. Information on the degree of management is lagging behind. On the other hand, the rapid development of technology about Internet of things, to bring a new way of thinking and offer new opportunities for all areas. Through technology about Internet of things, the information about use of the large equipment is connected to network, so that information is widely shared, promote the improvement of its usage, to play a greater efficiency.This paper studies and implements an application of Internet of things about current detection. Including the perception layer networks and Web applications. Perception layer is the foundation of the entire application,ZigBee technology build the perception layer network, and complete the connection of things. Design of hardware and software are described in detail in the article, including the hardware selection, schematic diagram designing, PCB design, operation mechanism of ZigBee, while detailing the events and functions of different types of nodes. Web applications provide users with information services and management functions, is the core of the application, that is,connecting things to people. Perception layer nodes monitoring operating current value of device,the nodes add a recursive estimation algorithm of fault prediction based on historical data. Then in real time through the gateway node to upload. Web applications are B/S architecture based on lightweight J2 EE and Java Web, Through the integration of framework about SSH(Struts2, Hibernate, and Spring) to design and develop. Information of Perception layer are stored in a MySQL database, Web application is deployed on a local area network or the Internet by Tomcat container, the Internet as the network layer. The layer of Web application follows the design pattern of MVC(view, model, controller). The pages are Written by HTML tags,CSS styles and JavaScript,as the presentation layer,and implementing interaction user-friendly. The logics of business are developed by Java.The mapping between Java objects and tables of the database is completed by Hibernate. Wide range of functional services is provided, including user management, SMS reminders, appointments, statistical reports, queries and so on. The logic of business and Transaction managed by the Spring, follow the “high cohesion and low coupling” of programming ideas.Finally, to test the hardware communication independently,to test the perception layer and Web application, to verify that recursive estimation algorithm of fault prediction based on partial data and draw conclusions.