EP1245485A1 - Vorrichtung zum Verhindern der Erkennung von flachen Aufbauten von Schiffen - Google Patents

Vorrichtung zum Verhindern der Erkennung von flachen Aufbauten von Schiffen Download PDF

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Publication number
EP1245485A1
EP1245485A1 EP02290749A EP02290749A EP1245485A1 EP 1245485 A1 EP1245485 A1 EP 1245485A1 EP 02290749 A EP02290749 A EP 02290749A EP 02290749 A EP02290749 A EP 02290749A EP 1245485 A1 EP1245485 A1 EP 1245485A1
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EP
European Patent Office
Prior art keywords
superstructure
screens
net
inclined plane
protective net
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP02290749A
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English (en)
French (fr)
Other versions
EP1245485B1 (de
Inventor
Bernard Aknin
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MBDAM
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MBDAM
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Publication date
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Publication of EP1245485A1 publication Critical patent/EP1245485A1/de
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Publication of EP1245485B1 publication Critical patent/EP1245485B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63G—OFFENSIVE OR DEFENSIVE ARRANGEMENTS ON VESSELS; MINE-LAYING; MINE-SWEEPING; SUBMARINES; AIRCRAFT CARRIERS
    • B63G13/00—Other offensive or defensive arrangements on vessels; Vessels characterised thereby
    • B63G13/02—Camouflage

Definitions

  • the present invention relates to a radar detection device of a flattened ship superstructure.
  • the armament of a combat ship in addition or to the places the usual cannons and torpedoes, includes missile batteries anti-ships or anti-aircraft missiles. These missiles and their means of launch can be arranged in superstructure on the deck of the ship. However, for obvious reasons of radar detectability, it is preferable that said missile batteries are, at most, arranged inside said vessel.
  • said missiles can be placed in wells vertical arranged under the deck of said vessel and closed at their upper part, by pivoting doors which, in the closed position - i.e. at battery rest outside of a firing sequence-- protrude slightly with respect to said bridge.
  • the superstructure of said missile batteries comprises therefore said doors in the closed position. She can understand, plus, flue gas exhaust stacks missiles. In all cases, it is very flat on the deck, not exceeding that this one hardly enough. As a result, the vessel's global radar signature mainly results from the other superstructures of it, such that hull, castle, gangway, masts, antennas, etc ...
  • the object of the present invention is therefore to make the part stealthy upper part of the superstructure of such missile batteries at rest, so that the overall radar signature of the ship is not affected.
  • a detection radar positioned laterally relative to said vessel, sends an incident beam on said superstructure, it can receive the corresponding reflected beam only, said incident beam hits one of said flat screens or said protective net.
  • the height of said screens can be relatively small. Indeed, the incident radar beams passing over of said screens and striking said net are also reflected in a different direction.
  • said protective net is stretched, between the edges free, opposite to said deck, of said inclined plane screens, so that the height of said net above deck is equal to that of said flat screens inclined.
  • said inclined plane screens and said net form a anti-radar protection enclosure enveloping said superstructure in the making it particularly discreet.
  • the device according to the present invention comprises, in addition to the port and starboard inclined flat screens, flat screens additional similar inclines forming, with said port screens and starboard, a polyhedron surrounding said superstructure, said protective net being stretched between the free edges of all of said inclined plane screens.
  • said device has four inclined plane screens - including a port screen and a screen starboard - forming a trunk-pyramidal tetrahedron surrounding said superstructure.
  • said height of inclined plane screens and said net is less than the length of the doors pivoting closure and that said protective net can be torn by each of said doors passing from the closed position to the position opened. So, by simply opening the doors, the net is torn and releases the passage opposite said wells, so that the missiles can be pulled instantly.
  • said net must, on the one hand, be able to be easily torn off by the doors of the wells when they were opened, but, on the other hand, be strong enough to withstand wind and bundles of Wed. We found it possible to meet these conflicting requirements by making said net with steel wires, the diameter of which is at more equal to 0.4 cm.
  • detection radars emit electromagnetic wave beams whose frequency is included between 2 and 18 GHz. It follows that, so that said net can reflect these electromagnetic waves, the largest dimension of its meshes must not be more than 0.8 cm. Preferably, we choose a mesh square with sides at most equal to 0.8 cm.
  • the angle of inclination of the inclined plane screens relative to the deck of the ship is chosen at most equal to 60 °.
  • Figure 1 shows, in top view, the bow of an equipped ship a missile battery, protected by the anti-detection device according to the present invention.
  • Figure 2 is a perspective view from above, according to arrow II of Figure 1, the anti-detection device of the latter figure.
  • Figure 3 is a schematic view of said anti-detection device similar to that of figure 2, the stealth safety net being supposed takes away.
  • Figures 4 and 5 are schematic sectional views, respectively along lines IV-IV and V-V in Figure 3.
  • Figure 6 schematically illustrates the opening of a door well of the missile battery, causing the tearing of said protective net Stealth.
  • Figure 7 is a diagram illustrating the operation of said device antidetection.
  • Figure 8 is a diagram illustrating the variation of the angle of reflection of an incident beam of electromagnetic waves as a function of the angle of incidence of this beam.
  • Figure 9 is a partial enlarged view of an exemplary embodiment the stealth protective net of the device of the invention.
  • Vessel 1 of longitudinal axis X-X, of which only the bow is represented in FIG. 1, comprises a bridge 2 and a castle 3, as well as a front artillery turret 4. Between the castle 3 and the turret 4, is planned a missile battery 5, surrounded by a frame 6 and covered by a net 7 (partially broken away in FIG. 1). Frame 6 and net 7 are shown on a larger scale in the perspective view of FIG. 2.
  • the battery missile 5 on board the ship, comprises a plurality of missiles 8, contained in vertical wells 9 arranged under deck 2.
  • the superstructure of the missiles 5, lying above deck 2 consists essentially a base plate 10, a plurality of closed doors 11 each of which closes the upper part of a well 9 and chimneys 12, intended for the evacuation of combustion gases from propellants (not shown) missiles 8 when fired.
  • Each door 11 is articulated in rotation on the base plate 10 around an axis 13.
  • the frame 6 consists of four inclined plane faces 14.1 to 14.4 forming a truncated pyramid with a rectangular base, projecting from the deck 2.
  • the height H of the frame 6 above the deck 2 is greater than the corresponding height h of superstructure 10, 11 and 12 (doors 11 being closed, as shown in Figures 3, 4, 5).
  • Box 6 is fixed to deck 2 and / or to base plate 10, by its large base using all known means, not shown.
  • the length L of the doors 11 is greater than the height H of the frame 6.
  • Each face 14.1 to 14.4 is capable of reflecting electromagnetic waves and forms a screen salient plane with respect to deck 2, forming an angle ⁇ with it.
  • the inclination ⁇ of the flat screens 14.1 to 14.4 is such that each of these approaches the superstructure 10, 11 and 12 (and therefore the others screens to form the small base of the pyramid trunk) away from the deck 2.
  • the trunk-pyramid frame 6 is arranged so that the inclined plane screens 14.1 and 14.3 are respectively to starboard and to port, while the flat screens inclined 14.2 and 14.4 are transverse.
  • the thread 7 has a sufficiently high mechanical resistance to be self-supporting, but weak enough to be able to be torn off partially by a door 11 passing in the open position, as this is illustrated diagrammatically in FIG. 6.
  • diagram 2 shows the deck 2 of the ship 1 and a horizontal reference plane r-r.
  • the superstructure 10, 11, 12 is discrete for the incident beam 19, up to angles of incidence I of 20 °.
  • the metal net 7 must have meshes the largest dimension of which must be less than half the length minimum waveform of the detection radar frequency band. Usually, this frequency band is delimited by the values extremes 2 and 18 GHz. It is therefore easy to deduce that the largest mesh size must be at most 8 mm.
  • FIG 9 there is shown an embodiment of net 7 with square meshes, formed of warp threads 17 and weft threads 18 perpendicular.
  • the dimension has sides of the square meshes is at most equal to 8 mm, as mentioned above.
  • the diameter of the steel wires 17 and 18 constituting the thread 7 can be of the order of 3 to 4 mm, in order to ensure a certain mechanical strength (for withstand wind and sea packets), without this net 7 is too solid, since it must tear under the action of doors 11 passing in the open position.
  • rigid spacers 16 can be provided between said net and said doors, as shown in Figure 4.
  • FIG. 7 a lateral incident beam has also been illustrated. of electromagnetic waves 21 striking the net 7 and reflected according to the beam 22 by the latter. We can see that this reflected beam 22 can in no case return to the lateral detection radar having emitted the incident beam 21.

Landscapes

  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Position Fixing By Use Of Radio Waves (AREA)
  • Geophysics And Detection Of Objects (AREA)
EP02290749A 2001-03-30 2002-03-26 Vorrichtung zum Verhindern der Erkennung von flachen Aufbauten von Schiffen Expired - Lifetime EP1245485B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0104320 2001-03-30
FR0104320A FR2822800B1 (fr) 2001-03-30 2001-03-30 Dispositif antidetection par radar d'une superstructure aplatie de navire

Publications (2)

Publication Number Publication Date
EP1245485A1 true EP1245485A1 (de) 2002-10-02
EP1245485B1 EP1245485B1 (de) 2004-12-01

Family

ID=8861739

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02290749A Expired - Lifetime EP1245485B1 (de) 2001-03-30 2002-03-26 Vorrichtung zum Verhindern der Erkennung von flachen Aufbauten von Schiffen

Country Status (10)

Country Link
US (1) US6583749B2 (de)
EP (1) EP1245485B1 (de)
AT (1) ATE283788T1 (de)
CA (1) CA2378639C (de)
DE (1) DE60202091T2 (de)
DK (1) DK1245485T3 (de)
ES (1) ES2230453T3 (de)
FR (1) FR2822800B1 (de)
NO (1) NO335753B1 (de)
RU (1) RU2225326C2 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1426726A1 (de) * 2002-12-05 2004-06-09 Buck Neue Technologien GmbH Radar-getarnter Werfer
EP1688348A2 (de) * 2005-02-02 2006-08-09 Blohm + Voss GmbH Schiff mit Tarneinrichtung

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050006527A1 (en) * 2003-07-07 2005-01-13 Conley Joseph Gerard Background radiation masking system
FR2890041B1 (fr) * 2005-08-26 2007-10-12 Dcn Sa Navire arme de surface furtif
US8462039B2 (en) * 2009-12-09 2013-06-11 Electronics And Telecommunications Research Institute Indoor electromagnetic environment implementing structure and a constructing method thereof
RU2533769C1 (ru) * 2013-07-11 2014-11-20 Федеральное государственное унитарное предприятие "Крыловский государственный научный центр" (ФГУП "Крыловский государственный научный центр") Устройство для снижения радиолокационной заметности объектов
CN106005330A (zh) * 2016-06-28 2016-10-12 张学衡 一种隐身导弹快艇
RU2683812C1 (ru) * 2017-12-13 2019-04-02 Федеральное государственное казенное военное образовательное учреждение высшего образования "Военный учебно-научный центр Военно-воздушных сил "Военно-воздушная академия имени профессора Н.Е. Жуковского и Ю.А. Гагарина" (г. Воронеж) Министерства обороны Российской Федерации Защитная панель для снижения радиолокационной и инфракрасной заметности объектов

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4323605A (en) * 1976-09-14 1982-04-06 Brunswick Corporation Camouflage incising geometry
RU2101658C1 (ru) * 1996-01-30 1998-01-10 Сергей Владимирович Ковалев Устройство для радиолокационной маскировки наземных объектов
WO2001009562A1 (en) * 1999-07-28 2001-02-08 Tenix Defence Systems Pty Ltd Retrofitting vessels to deflect radar signals

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US3806927A (en) * 1973-02-01 1974-04-23 Whittaker Corp Radar reflector buoy
DE3918383A1 (de) * 1989-06-06 1990-12-20 Messerschmitt Boelkow Blohm Fassadenaufbau von hochbauten
US4990918A (en) * 1989-12-21 1991-02-05 University Of British Columbia Radar reflector to enhance radar detection
JPH04316996A (ja) * 1991-04-16 1992-11-09 Mitsubishi Heavy Ind Ltd 航空機等のレーダ反射低減装置
US6252541B1 (en) * 1994-07-11 2001-06-26 Mcdonnell Douglas Corporation Low RCS test mounts
US6060411A (en) * 1997-10-08 2000-05-09 Northrop Grumman Corporation Low observable weapon kit
US6184815B1 (en) * 1998-12-17 2001-02-06 Marvin Lee Carlson Transmission line electromagnetic reflection reduction treatment

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4323605A (en) * 1976-09-14 1982-04-06 Brunswick Corporation Camouflage incising geometry
RU2101658C1 (ru) * 1996-01-30 1998-01-10 Сергей Владимирович Ковалев Устройство для радиолокационной маскировки наземных объектов
WO2001009562A1 (en) * 1999-07-28 2001-02-08 Tenix Defence Systems Pty Ltd Retrofitting vessels to deflect radar signals

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Section PQ Week 199835, Derwent World Patents Index; Class Q79, AN 1998-412225, XP002187151 *
MRAZ S J: "STEALTH STALKS THE HIGH SEAS. THE SEA WRAITH COMBINES SEVERAL STEALTH TECHNOLOGIES WITH THE LATEST ADVANCES IN WEAPON AND HULL DESIGN", MACHINE DESIGN, PENTON,INC. CLEVELAND, US, vol. 69, no. 10, 22 May 1997 (1997-05-22), pages 40,42,44, XP000725016, ISSN: 0024-9114 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1426726A1 (de) * 2002-12-05 2004-06-09 Buck Neue Technologien GmbH Radar-getarnter Werfer
EP1688348A2 (de) * 2005-02-02 2006-08-09 Blohm + Voss GmbH Schiff mit Tarneinrichtung
DE102005004682A1 (de) * 2005-02-02 2006-08-17 Blohm + Voss Gmbh Schiff mit Tarneinrichtung
EP1688348A3 (de) * 2005-02-02 2009-05-13 Blohm + Voss GmbH Schiff mit Tarneinrichtung

Also Published As

Publication number Publication date
RU2225326C2 (ru) 2004-03-10
DE60202091D1 (de) 2005-01-05
DE60202091T2 (de) 2005-12-15
FR2822800B1 (fr) 2003-08-08
NO335753B1 (no) 2015-02-02
US20030011504A1 (en) 2003-01-16
NO20021546D0 (no) 2002-03-27
FR2822800A1 (fr) 2002-10-04
ES2230453T3 (es) 2005-05-01
NO20021546L (no) 2002-10-01
EP1245485B1 (de) 2004-12-01
DK1245485T3 (da) 2004-12-27
CA2378639C (fr) 2009-06-23
CA2378639A1 (fr) 2002-09-30
US6583749B2 (en) 2003-06-24
ATE283788T1 (de) 2004-12-15

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