EP1245485B1 - 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
EP1245485B1
EP1245485B1 EP02290749A EP02290749A EP1245485B1 EP 1245485 B1 EP1245485 B1 EP 1245485B1 EP 02290749 A EP02290749 A EP 02290749A EP 02290749 A EP02290749 A EP 02290749A EP 1245485 B1 EP1245485 B1 EP 1245485B1
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EP
European Patent Office
Prior art keywords
superstructure
screens
deck
inclined plane
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.)
Expired - Lifetime
Application number
EP02290749A
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English (en)
French (fr)
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EP1245485A1 (de
Inventor
Bernard Aknin
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MBDAM
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MBDAM
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Filing date
Publication date
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Publication of EP1245485A1 publication Critical patent/EP1245485A1/de
Application granted granted Critical
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 batteries of missiles 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 verticals 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 pretty little this one.
  • 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 weak. 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 drawn instantly.
  • said net must, on the one hand, be able to be easily torn off by the doors of the wells when they 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 flat inclined screens relative to the deck of the ship is chosen at most equal to 60 °.
  • Vessel 1 of longitudinal axis X-X, of which only the bow is represented in FIG. 1, has 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 of them 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 the superstructure 10, 11 and 12 (the 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 plan 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 schematically 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 the 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 cannot in any 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)
  • Geophysics And Detection Of Objects (AREA)
  • Position Fixing By Use Of Radio Waves (AREA)

Claims (9)

  1. Vorrichtung, die es erlaubt, flache Aufbauten (10, 11, 12), die von dem Deck (2) eines Schiffes (1) getragen werden, für elektromagnetische Wellen unortbar zu machen, insbesondere Aufbauten einer Batterie (5) von Raketen (8) in inaktivem Zustand, die sich an Bord des Schiffes befinden und deren Raketen in vertikalen Schächten (9) sind, die teilweise unter dem Schiffsdeck liegen und an deren oberen Enden schwenkbare Abschlusstüren (11) angebracht sind, die in geschlossenem Zustand zumindest einen Teil der Aufbauten bilden,
    dadurch gekennzeichnet, dass sie Folgendes aufweist:
    mindestens sowohl auf der Backbord- als auch auf der Steuerbordseite der Aufbauten mindestens einen flachen Schirm in Kippstellung (14.1, 14.3), der so ausgebildet ist, dass er ein ankommendes Strahlenbündel (19) aus elektromagnetischen Wellen in eine andere Richtung reflektiert als die, aus der es gekommen ist, wobei die Schirme um eine Höhe (H) über das Schiffsdeck emporragen, die größer ist als die Höhe (h) der Aufbauten, und die Neigung der Schirme so ausgelegt ist, dass sie sich vom Schiffsdeck weg in Richtung Aufbauten neigen; und
    ein Netz (7), das die elektromagnetischen Wellen reflektiert und über die Aufbauten gespannt ist.
  2. Vorrichtung gemäß Anspruch 1,
    dadurch gekennzeichnet, dass das Schutznetz (7) zwischen den freien Kanten (15.1, 15.3) der flachen Schirme in Kippstellung (14.1, 14.3), auf der dem Deck gegenüberliegenden Seite gespannt ist.
  3. Vorrichtung gemäß Anspruch 2,
    dadurch gekennzeichnet, dass sie außer den flachen Schirmen in Kippstellung (14.1, 14.3) backbord und steuerbord zusätzliche ähnliche flache Schirme in Kippstellung (14.2, 14.4) aufweist, die zusammen mit den Schirmen backbord und steuerbord ein Polyeder bilden, das die Aufbauten umgibt, und dass das Schutznetz (7) zwischen den freien Kanten (15.1 bis 15.4) aller flachen Schirme in Kippstellung (14.1 bis 14.4) gespannt wird.
  4. Vorrichtung gemäß Anspruch 3,
    dadurch gekennzeichnet, dass sie vier flache Schirme in Kippstellung (14.1 bis 14.4) aufweist, die einen pyramidenstumpfförmigen Tetraeder formen, der die Aufbauten umgibt.
  5. Vorrichtung gemäß einem der Ansprüche 2 bis 4,
    dadurch gekennzeichnet, dass die Höhe (H) der flachen Schirme in Kippstellung und des Netzes (7) kleiner ist als die Länge (L) der schwenkbaren Abschlusstüren (11), und dass das Schutznetz (7) von jeder dieser Türen (11) zerrissen werden kann, wenn sie aus geschlossenen Zustand heraus geöffnet wird.
  6. Vorrichtung gemäß einem der Ansprüche 1 bis 5,
    dadurch gekennzeichnet, dass der Neigungswinkel () der flachen Schirme in Kippstellung (14.1 bis 14.4) in Bezug zum Deck (2) maximal 60 ° beträgt.
  7. Vorrichtung gemäß einem der Ansprüche 1 bis 6,
    dadurch gekennzeichnet, dass die Maschengröße des Schutznetzes (7) maximal 0,8 cm beträgt.
  8. Vorrichtung gemäß Anspruch 7,
    dadurch gekennzeichnet, dass die Maschen des Schutznetzes (7) quadratisch sind und ihre Seiten (a) maximal 0,8 cm lang sind.
  9. Vorrichtung gemäß einem der Ansprüche 1 bis 8,
    dadurch gekennzeichnet, dass das Schutznetz (7) aus sich kreuzenden Stahlfäden (17, 18) mit einem maximalen Durchmesser von 0,4 cm besteht.
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 EP1245485A1 (de) 2002-10-02
EP1245485B1 true EP1245485B1 (de) 2004-12-01

Family

ID=8861739

Family Applications (1)

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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)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10256984B4 (de) * 2002-12-05 2005-08-11 Buck Neue Technologien Gmbh Radar-getarnter Werfer
US20050006527A1 (en) * 2003-07-07 2005-01-13 Conley Joseph Gerard Background radiation masking system
DE102005004682A1 (de) * 2005-02-02 2006-08-17 Blohm + Voss Gmbh Schiff mit Tarneinrichtung
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

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US3806927A (en) * 1973-02-01 1974-04-23 Whittaker Corp Radar reflector buoy
US4323605A (en) * 1976-09-14 1982-04-06 Brunswick Corporation Camouflage incising geometry
DE8915902U1 (de) * 1989-06-06 1992-02-13 Messerschmitt-Bölkow-Blohm GmbH, 8012 Ottobrunn 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
RU2101658C1 (ru) * 1996-01-30 1998-01-10 Сергей Владимирович Ковалев Устройство для радиолокационной маскировки наземных объектов
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
AUPQ189499A0 (en) * 1999-07-28 1999-08-19 Tenix Defence Systems Pty Ltd Improvements in or relating to vehicles

Also Published As

Publication number Publication date
ES2230453T3 (es) 2005-05-01
US20030011504A1 (en) 2003-01-16
NO335753B1 (no) 2015-02-02
DE60202091D1 (de) 2005-01-05
DE60202091T2 (de) 2005-12-15
EP1245485A1 (de) 2002-10-02
CA2378639A1 (fr) 2002-09-30
FR2822800A1 (fr) 2002-10-04
US6583749B2 (en) 2003-06-24
NO20021546D0 (no) 2002-03-27
CA2378639C (fr) 2009-06-23
DK1245485T3 (da) 2004-12-27
ATE283788T1 (de) 2004-12-15
NO20021546L (no) 2002-10-01
RU2225326C2 (ru) 2004-03-10
FR2822800B1 (fr) 2003-08-08

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