实现长输管道各站数据同步的技术分析

Technologic Analysis of Data Synchronization of Stations on Long Transmission Pipeline

保证长输管道上各站压力信号序列的同步是应用负压波准确进行泄漏定位的基础。结合现场实例,针对专用电话线和网络传输这两种不同的数据通信方式,提出并实现了采用固定延时补偿和将变延时转化为固定延时的方法。使中心站处理的首站和末站数据同步。与常规的管道泄漏监测数据通信系统相比,采用这种技术不需要安装全球卫星定位系统,在保证系统精度的同时,降低了系统的成本。

To ensure synchronization of pressure signal sequence from each station along the long distance transmission pipeline is the basis of accurate leakage locating by adopting negative pressure wave. Referring to the field case , and in accordance with two different kinds of data communication, i. e. dedicated telephone line and network transmission, by adopting fixed compensation for time delay and converting varying time delay into fixed time delay~ data from the first station and the last station are synchronized and to be handled in central station. Comparing with the conventional leakage monitoring and data communication system, with this technology, it is unnecessary to install satellite global position system. The accuracy of system can he guaranteed and the cost of system can he reduced.