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Real-time networked sonar system for ships

業種 海上
関連製品 EDS-510A シリーズ
EDS-518A シリーズ
概要 The sonar positioning system requires a high-speed network to connect devices in the hull unit room with other devices on the bridge. In addition to requiring components that are DNV and GL certified, speed and redundancy are also important considerations. For this reason, the sonar positioning system uses MOXA’s managed Ethernet switches to form a redundant network between the sonar system in the hull, and electronic devices on the bridge.
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Introduction


A multinational, knowledge-based corporation that delivers marine electronics solutions is utilizing industrial Ethernet technology to help ensure that operations at sea are dependable and optimal. Based in Europe, the company has nearly 4000 employees working in 20 countries around the world, and produces high-tech systems for offshore oil and gas operations, merchant marine systems, and various applications for the defense and aerospace industries.


The company produces products and systems used by merchant vessels and offshore installations for positioning, navigation, and automation, as well as products and systems for surveying and monitoring the seabed, and for fishing vessels and fisheries research. As one of the major suppliers of high quality marine electronics in the world, their products include chart plotters for yachts, triple redundant dynamic positioning systems for oil drilling rigs, and sonar and instrument systems for scientific research vessels.


Products used for marine applications must be rugged enough to endure the corrosive effects of salt water, and be able to withstand excessive amounts of vibration and shock. For this reason, the company only uses products and components that are DNV and GL certified to ensure that their systems can meet the high standards required by the maritime industry.


System Description

The sonar positioning system requires a high-speed network to connect devices in the hull unit room with other devices on the bridge. In addition to requiring components that are DNV and GL certified, speed and redundancy are also important considerations. For this reason, the sonar positioning system uses MOXA’s managed Ethernet switches to form a redundant network between the sonar system in the hull, and electronic devices on the bridge.


Each sonar unit uses one transmit transducer array and one receive transducer array that link to the main transceiver for detecting objects under water. MOXA’s EDS-518A managed switch is used in the hull unit room to connect to different sonar devices, and the EDS-510A-1GT2SFP is housed on the bridge. Together, the switches create a gigabit redundant ring that connects the sonar system to the bridge. Note that the EDS-518A’s two gigabit ports connect to two of the EDS-510A’s three gigabit ports to form the redundant gigabit backbone. The third gigabit port on the EDS-510A is used to send a data log (which could involve massive amounts of data) to the operations station.


Transceivers are installed in different parts of a ship for different types of applications. For anti-submarine and mine detection applications for example, the transceiver would be located near the bow of the ship. On the other hand, for commercial and research type vessels, the transceiver would be located near the stern. The Ethernet network allows the system to transmit signals from the sonar to the ship’s bridge in real time. This is particularly important for anti-submarine and mine detection applications, since having access to real-time information is essential for the survival of the ship and its crew.


 


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