Abstract: After analyzing the architecture of distributed monitoring and control system, the design of distributed monitoring and control system based on the OPC XML-DA standard is presented in this paper. According to the practice sea environment monitoring system, the framework of server side program is given and the series service of “subscribe” is described in detail. According to the real time requirement of sea environment data, standard “Read” service based on the persistent connection mechanism of HTTP 1.1 protocol is extended.

Key words: OPC, XML, SOAP, Sea monitoring

摘要： 在对分布式监控系统架构进行分析的基础上，给出基于OPC XML-DA(OLE For Process Control XML Data Access)标准的分布式监控系统的设计。结合实际海洋环境监测系统对海洋环境参数的分布式实时监测，给出了运行于海洋监测台站端的Server程序框架并着重描述了标准中的Subscribe系列服务的具体应用。根据监测数据的实时性要求，基于

关键词: OPC, XML, SOAP, 海洋监测