基于解析适配层的公路外场设备底层协议构建

Construction of underlying protocol for highway field devices based on analysis adaptation layer

针对目前高速公路各交通管理控制系统互操作性不强和众多种类的外场设备互换性不足的问题,在分析外场设备底层数据、基于XML进行交通数据交换的优势的基础上,提出一种基于XML封装的统一数据对象的外场设备底层协议处理方式的层次结构,构建了底层解析适配层Adapter,屏蔽不同信息系统之间数据交互细节,兼容各种不同种类、型号的外场设备,实现高速公路各系统及不同外场设备的底层数据的透明传输。以监控摄像机为例,实现了基于XML封装的统一数据对象的外场图像监控设备控制系统。

Due to the fact that the interoperability of current highway management control systems is not so strong and the interehangeability of various kinds of field devices is sometimes insufficient,a hierarchical structure of field device underlying protocol is proposed which is based on unified XML package. The protocol is constructed based on the analysis of underlying field device data and the advantages of using XML to exchange traffic data. An underlying adaptation layer called ＇adapter＇ has been built to shield the details between different information systems and also be compatible with different types of field devices. In conclusion, the ＇ adapter＇ can result in the transparent transmission of highway systems and different field devices. Surveillance cameras is taken as an example, a unified XMI.~based coiatrol system for field image monitoring is proposed.