Design And Implementation Of Internet Of Things Situation Monitoring System Based On Resource Description Model

At present,many monitoring systems based on the Internet of Things are widely developed and applied in order to facilitate production activities.The monitoring configuration diagram which graphically represents the physical system helps operations and maintenance personnel to complete various monitoring operations of the system.In the traditional monitoring system,the production of the monitoring configuration diagram often needs to be completed manually step by step,which is time-consuming and laborious.It does not take into account the increase or change of the application scenario.The production process of the monitoring configuration diagram is complicated,the production method is not flexible,and the defects and problems such as poor graphic evolution are becoming more and more prominent,making it difficult for the system to expand according to the scene changes.In view of the above problems,this paper proposes a situation monitoring system for the Internet of Things based on a resource description model.This system realizes the semi-automatic construction of the monitoring configuration diagram by constructing a unified resource description model,and uses the configuration method,and combines geographic information technology to provide cross-platform situation monitoring services,which improves the automation and flexibility of the monitoring system.The main work of the thesis is as follows:(1)A construction method of resource description model is proposed.In order to solve the problem that complex and diverse resource information such as devices and sensors in the Internet of Things system cannot be described and used uniformly,the system selects OWL with rich semantic expression capabilities and creates physical objects and monitoring attributes related to system monitoring based on the Semantic Sensor Network Ontology.The user can add specific examples to obtain a resource description model that comprehensively expresses monitoring resource information.This model can help the system automatically complete the extraction of resource information.(2)A semi-automatic construction method for monitoring configuration diagram is proposed.The system automatically complete the preliminary layout of the diagrams and the basic connection relationship in the diagrams by reusing and transforming the most similar configuration diagram template according to the resource description model to solve the problem of complicated and inflexible production process of monitoring configuration diagrams.In the process of completion,the graph cells are automatically bound to the monitoring resources.If the initial diagram is not clear or intuitive,the user can manually adjust the layout and style of the diagram,and can also set monitoring sensitive points for it,bind database data fields to make the monitoring configuration diagram more complete.Users can customize monitoring resource template,select resources of interest in the monitoring process,and reduce unnecessary information display before construction to solve the problem of too much system resource information and inconvenient display at the same time.(3)Build a web monitoring platform for the Internet of Things situation.Because the construction process of the monitoring configuration diagram is independent of the monitoring process,this platform provides flexible deployment monitoring services in order to solve the problem that the monitoring configuration diagram cannot be directly invested in the monitoring application.On the one hand,you can deploy monitoring configuration diagrams across platforms to achieve real-time data monitoring of specific equipment,display alarm information in time,and remotely control the status of equipment;on the other hand,you can use geographic information technology to monitor the operation of different regions and monitor system overview visually by combining various situations statistical charts to maintain normal system operation.From the different perspectives of requirements analysis,system design and system implementation,this paper elaborates the system requirements,design ideas and implementation results of the Internet of Things situation monitoring system based on the resource description model.Combined with the actual application scenarios of High Precision Ground-based Time Service System,the system test was performed,and the feasibility of the system scheme design was verified.