Degaussing Systems

Mine protection systems for small and large vessels

Degaussing Systems

Modern mines affect ocean detecting magnetic interference of a vessel in the earth's magnetic field, this is called the ships magnetic signature. This signature is the main influence of those used to trigger the sea mine or torpedo.

If the signature is detected and analyzed then the vessel is right there and therefore it is the magnetic signal that becomes a trigger for torpedo or mining explosion or gives a position (mainly submarine) and categorization.

In order to minimize this threat vessel, it is equipped with a built-in Degaussing System (DG). DG reduces the signature with a counter acting field generated from a gaming system connected to the loop coil power amplifier. Typically, 90-95% of the ship's signature can be neutralized with a well-designed 3-dimensional DG system.

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Management magnetic signature

Polyamp has delivered over 40 DG systems, all of which are computer-controlled Advanced Degaussing Systems (ADG).

Polyamp offers several types of loop-coil amplifiers for installation on different sizes of vessels. The location of the coil loop amplifier can either be centralized in the rack or distributed near the coil. The ADG method improves signature performance and the time and effort required in everything relative to a system with only a few large amplifiers.

Polyamp specializes in Advanced Degaussing Systems (ADG), which in general terms means that each coil is individually controlled by a loop pole amplifier (BPAU), and that the coil system is 3-dimensional. Polyamp had digitally controlled amplifiers since the early 1980s and the current version of Degaussing Digital Control is the third generation.
demagnetization equipment

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Typical demagnetization equipment

Sea-operational priorities have shifted from blue water to brown/shallow water. This means that the threat increases as ships arrive much closer to the influence mines. Better demagnetization systems than previously used therefore are now required. The answer to this increased threat is ADG.

  • Typical demagnetization equipment
  • Systems suitable for the smallest vessel to aircraft carrier
  • Turnkey capacity including system design, equipment delivery and proof trials
  • Favorable total cost of ownership
  • Effective signature management with control, evaluation and prediction
  • Modular and digital open systems can be upgraded for future threats
  • Cost-effective procurement

A Polyamp ADG is normally controlled by one or more magnetometers to achieve a low signature. Several backup modes are available, including the Gyro Geomagnetic map and manual, depending on the design of the system.

The ADG signature adjusts by changing loop coil currents. Worldwide operations can be maintained without having to change connections on junction boxes or to control everything before the business area.

The ADG comprehensive process is much faster, especially when using SWECADE © extensive data acquisition and measurement software with coil modeling.

Remote control from the interval office can be achieved, quickly and safely by simply connecting a transceiver to the DG system.

The Polyamp's powerful ADG system enables significant savings on the overall cost of installation and weight to be achieved using smaller and thinner demagnetization coil cables. This is of great benefit to the shipyard.

ADG is also ideal for the modern principles of section building of ships. The location of the Degaussing System components is very flexible and there is no need for a dedicated dedicated console operator to run ADG. The console function can be one of many other programs in the appropriate PC workstation aboard the ship.

A typical block diagram of a distributed Polyamp ADG system.

If you have any questions about our products, you are welcome to contact us.
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Polyamp Power Division is specialised in DC/DC converters and power supplies. Since the 1970's we design DC/DC converters with a reputation of very high reliability and electrical performance, used in systems with high demands.

Polyamp Systems Division is specialised in design of Naval electromagnetic signatures supression for international customers in Navies or shipyards. We also produce a Underwater Electric Potential (UEP) sensors which is mainly used in Naval and in Oil exploration applications.