Research And Application Of Digital Monitoring Technology For Four-way Vehicle Storage System

With the continuous development of the logistics industry,various types of warehousing systems have followed,including four-way shuttle truck intensive warehouses.The four-way shuttle has four movement directions,front,rear,left,right,and hoist.It can realize three-dimensional movement in the four-way garage with good flexibility and is widely used in e-commerce and other fields.However,as the scale of the four-way garage continues to increase and the number of heterogeneous devices continues to increase,the integration and sharing of device information can be realized through dedicated communication drivers.The development cost is too high and the coupling is serious,which cannot meet the needs of four-way garage equipment monitoring.Moreover,there are many control links in the warehousing operation process of the four-way-vehicle,the operation environment is complex,and the operation is concurrent.The hard-coded automatic control equipment is used to complete the operation.The system has poor maintainability and scalability,and cannot meet the needs of the four-way vehicle warehousing operation.Collaboration and efficiency;traditional The warehouse monitoring system has a low degree of visualization,and most of them focus on the monitoring of a single equipment and operation,and lack the monitoring of the warehousing operation process.Therefore,in order to ensure the life safety of warehousing staff,improve the efficiency and visualization of warehousing operations,and reduce warehousing labor costs,this paper studies the digital monitoring technology of four-way vehicle warehousing system based on OPC UA technology,database technology,and WEB service technology.The content is as follows:（1）Digital modeling of Warehousing heterogeneous equipment based on OPC UA technology.In order to reduce the coupling between software and physical equipment and improve the reusability of the code,digital modeling of the four-way warehouse heterogeneous equipment is carried out.First of all,in order to realize the persistent management of equipment static information and storage resource entities,and to provide data storage structure and data access basis for the storage monitoring system,this paper is based on E-R relationship analysis,object-oriented modeling,and object-relational mapping technology.The resource static information is mapped to the table of the database.Secondly,in order to eliminate the communication differences between different devices and realize the information integration and sharing between different communication infrastructure devices,a unified communication channel is constructed based on OPC UA,and on this basis,object-oriented is used to map the state of physical devices into warehouse numbers.The attributes of the device map the control of the digital device by the system to the control of the physical device in real time,so as to reduce the coupling between the software and the physical device.It provides an important technical basis for the automatic control of subsequent warehousing operations.（2）Event-driven digital workflow automation controlIn order to meet the needs of the modern four-way garage to complete the warehousing operation efficiently,digital operation process control equipment is established to complete the warehousing operation.First of all,according to the characteristics of the operation control process of the four-way vehicle storage system,the idea of workflow is adopted to analyze the actual operation process,and the operation of the equipment on the goods in the operation process is decomposed into five types of storage operation activities to establish a unified storage system.Workflow model;secondly,in view of the uncertainty and unpredictability of the operating environment,an event-driven architecture is adopted,event status data is collected from digital devices and inventory files,the scheduler is used as the event dispatcher,and the job process is used as the event response.It designs the warehousing operation workflow drive mechanism,realizes the sequence control of operation activities,branch jump,activity fault tolerance and redo,and improves the operation robustness.Finally,combined with the actual situation of the subject test platform,the warehousing and warehousing operation process is designed,and the "autonomy" of the object is used to realize the parallel warehousing operation and improve the warehousing operation efficiency of the four-way vehicle.（3）Real-time visual monitoring technology for four-way vehicle warehousing operation sceneIn view of the low degree of visualization of traditional warehouse monitoring systems,and most of them focus on the monitoring of detailed status information such as single equipment and operations,there is a lack of remote real-time visual monitoring of the warehousing operation process.Through object-oriented thinking and service technology,the subject establishes a data model of equipment and cargo space status to obtain real-time status data;adopts WEB real-time communication technology to design an on-demand push mechanism for warehousing operation scenarios,and pushes the changing status of equipment and shelves to real-time data.Warehousing application service;using front-end visualization technology and Java Script technology,establish UI model and front-end object model of warehousing operation scene,express warehousing operation scene in different states with UI model,and drive object model change with real-time state data,thereby driving UI model change,In this way,the real-time visual monitoring of operation scenarios in different terminals can be realized,and the needs of four-way truck storage operation scenarios of different scales can be met.The visibility of the warehousing operation process is further improved.To sum up,the subject uses ASP.NET technology,OPC UA technology,database technology,front-end visualization technology,real-time WEB technology to develop a four-way vehicle storage monitoring system.Through system testing and enterprise trial,the performance and function of the warehouse monitoring system developed by the project are verified.The results show that the system has good and practical effects and can meet the needs of visual monitoring of four-way vehicle warehouse operations.For further research based on digital technology The four-way garage visualization monitoring system provides a technical basis for reference.