同频数传电台的煤气长输管线监测调度系统

Monitoring and dispatching system in long-distance gas pipeline based on the same frequency digital broadcasting station

通过分析哈依煤气长输管线的地理分布、行业特点及运行监测调度系统的基本功能,给出了基于同频数传电台的煤气长输管线监测调度系统的解决方案.与GPRS方案相比具有独立性好、可靠性高等特点.通过建立延时协议、设置足够大的接收缓冲区、设置4字节帧头、和校验,解决了基于同频数传电台的监测调度系统各分输站向空间发送信号的时段分配问题;命令、数据帧溢出问题;命令、数据帧的帧同步问题;数据传输的正确性检验问题.运行实践表明,其系统的解决方案正确、系统工作稳定,即使在恶劣气象条件下也未出现过数据接收不到或接收不准确的情况.

According to analyses on the geographical distribution and the fundamental function of the monitoring and dispatching system of Harbin-Yilan long-distance gas pipeline, a solution to the monitoring and dispatching system in long-distance gas pipeline based on the same frequency digital broadcasting station is presented. It is more independent and more reliable compared with the solution of GPRS. The dispatching time periods for sub station sending signal, the overflow of command and data frame, the synchronization of command and data frame, and the verification of the data-transmission have been solved by drafting a time-delay protocol, setting up a big enough receiving buffer and a 4-byte head of the frame, and checking. Operation practice shows that the presented solution is correct, and the system operates stably, even in bad weather conditions.