文章主要介绍了基于以太网的三种协议的通讯综合应用,包含单机完成MODBUS ON TCP、S7及TCP/IP通讯和SOFT PLC架构下多网卡与MODBUS数据结构的访问处理,完成了天然气数据的高速、稳定数据采集,解决方案不涉及网络安全、防雷、易燃区域防...文章主要介绍了基于以太网的三种协议的通讯综合应用,包含单机完成MODBUS ON TCP、S7及TCP/IP通讯和SOFT PLC架构下多网卡与MODBUS数据结构的访问处理,完成了天然气数据的高速、稳定数据采集,解决方案不涉及网络安全、防雷、易燃区域防爆等问题,文章重点介绍了系统方案确立过程和思路,同时对具体实施简要说明。展开更多
A regional groundwater management system has been elaborated, integrating Relational Database Management System （RDBMS） and various web services. It consists of web geospatial application so-called HydrlS （ Hydroge...A regional groundwater management system has been elaborated, integrating Relational Database Management System （RDBMS） and various web services. It consists of web geospatial application so-called HydrlS （ Hydrogeological Information System） based on Open Source components and technologies, leading to a feasible and low-cost solution. Therefore, HydrlS permits delivery of data from a number of heterogeneous sources to standards supported by the Open Geospatial Consortium （OGC）. The protocols used for exchanging data are also derived from OGC standards, i.e., WMS （Web Mapping Service）, WFS （Web Feature Service）, and WCS （Web Coverage Service）. Finally, a geoportal was developed, which consists of client-applications that communicate with different Web Services （WMS, WCS, and WFS） through HTTP-requests. A prototype for web-based GIS application was designed using the deegree Framework to provide systematic interfaces and functions. This system was developed to demonstrate the value of making hydrogeological data more widely accessible through client/server architecture. This experience and knowledge already gained in this project will be a source for technology transfer and policy decisions. Otherwise, this will enable user groups to improve the management of their groundwater resources and contribute to enhanced decision support capabilities.展开更多
文摘文章主要介绍了基于以太网的三种协议的通讯综合应用,包含单机完成MODBUS ON TCP、S7及TCP/IP通讯和SOFT PLC架构下多网卡与MODBUS数据结构的访问处理,完成了天然气数据的高速、稳定数据采集,解决方案不涉及网络安全、防雷、易燃区域防爆等问题,文章重点介绍了系统方案确立过程和思路,同时对具体实施简要说明。
文摘A regional groundwater management system has been elaborated, integrating Relational Database Management System （RDBMS） and various web services. It consists of web geospatial application so-called HydrlS （ Hydrogeological Information System） based on Open Source components and technologies, leading to a feasible and low-cost solution. Therefore, HydrlS permits delivery of data from a number of heterogeneous sources to standards supported by the Open Geospatial Consortium （OGC）. The protocols used for exchanging data are also derived from OGC standards, i.e., WMS （Web Mapping Service）, WFS （Web Feature Service）, and WCS （Web Coverage Service）. Finally, a geoportal was developed, which consists of client-applications that communicate with different Web Services （WMS, WCS, and WFS） through HTTP-requests. A prototype for web-based GIS application was designed using the deegree Framework to provide systematic interfaces and functions. This system was developed to demonstrate the value of making hydrogeological data more widely accessible through client/server architecture. This experience and knowledge already gained in this project will be a source for technology transfer and policy decisions. Otherwise, this will enable user groups to improve the management of their groundwater resources and contribute to enhanced decision support capabilities.
