Data Transmission Internet-based Data Transmission for Pipeline Monitoring
If process technology parameters need to be monitored in an extensive system, copious cable connections tend to be required. As the application example of a pipeline shows, this type of data can also be transmitted securely and quickly with standard components via the Internet.
Pressure, temperature, and flow of the medium transported through the pipeline are regarded as some of the most important physical parameters when monitoring a pipeline. These data must be permanently acquired in sensor stations, which are installed along the pipeline. For a pilot project in Taiwan, Krohne Messtechnik and Phoenix Contact have developed a solution in order to shape the process more efficiently.
The pipeline conveys fuels which are ready for use, such as gasoline and diesel between the two fuel depots. In order to detect potential leakages as quickly as possible in an era of globally publicized environmental protection, the user opted to set up a monitoring system. Yet another reason is to prevent unauthorized access to the fuel being transported by the pipeline. In particular, with such an attractive medium, thefts often occur on an international scale, which have been thoroughly planned and are performed on a long-term basis, e.g. if fuel is drained using a subsequently fitted illegal valve on the pipeline, which damages the pipeline operator and the environment in the long term.
Special Consideration of Transient States
For the illustrated areas of application, Oil and Gas experts from Krohne have developed a reliable monitoring solution over many years. This is an integral part of the Pipe-Patrol software, which runs on a server in the user’s control room. In doing so, the concept considers the special relations when piping fuels, e.g. pressure wave development in switching processes on the pipeline and the special physical behavior of the variables in their conveyed volume.
In such areas of application, a pressure sensor with a permanently defined switching point proves insufficient. Due to the broad area covered by a pipeline, transient states must be included in any monitoring. This includes the filling and starting of conveying mode, which are also to be monitored, as well as draining and stopping. In this case, Krohne uses the complex physical Real Time Transient Model (RTTM). In earlier projects, the sensors installed along the pipeline could be directly connected to the Pipe-Patrol server.
However, in the case of the Taiwanese user, a cable-based connection was not possible, which is why those involved opted for remote transmission of data. Based on the long-term partnership, the Duisburg-based sensor specialist put its trust in Phoenix Contact, in order to work together to develop a suitable communication solution for this application.