At the Institute of System Dynamics (ISYS) in Stuttgart an integrated navigation system for inland vessels has been developed in cooperation with the Max Planck Institute (MPI) in Magdeburg. It combines online information from sensors like radar, GPS (Global Positioning System), turning rate indicator and others with a-priori knowledge stored in an electronic chart. This integrated navigation system supports the skipper in difficult situations such as foggy weather or at night by overlaying the electronic chart with the radar image and by displaying navigational information. Furthermore, an automatic guidance module has been added on to the navigation system. It is capable of automatically steering the vessel along a guidingline that can be chosen by the skipper. Recent experiments on several inland vessels have proven the feasibility of automatic guidance for any kind of river vessel. Test vessels include small customs boats, a medium size excursion boat on the Elbe and a large push tow on the Rhine river. The next step towards fully automatic river navigation is collision detection and avoidance (CDA). In order to deal with CDA, the automatic guidance module is considered to be in a stable stage. The remaining task then is to compute a collision free, navigable guidingline along which the automatic guidance module can steer the vessel. In this paper, a collision avoidance method is presented that involves a central surveillance station monitoring a narrow river section. Vessels that get close to the monitored river section have to register at the surveillance station and ask for a guidingline. The central station uses an algorithm that is based on multicommodity network flows to compute collision free guidinglines for all vessels that are present in the monitored river section. The automatic guidance modules steer the vessels along the given guidinglines. The communication between the vessels and the surveillance station is accomplished using the Automatic Identification System (AIS). AIS is mandatory on seagoing vessels since 2003 and is becoming largely available on inland vessels, too.


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    Titel :

    Collision avoidance on narrow river sections using multicommodity network flows


    Weitere Titelangaben:

    Kollisionsvermeidung an engen Flussabschnitten durch Nutzung mehrerer Netze


    Beteiligte:


    Erscheinungsdatum :

    2007


    Format / Umfang :

    9 Seiten, 9 Bilder, 1 Tabelle, 7 Quellen


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Datenträger


    Sprache :

    Englisch





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