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EP0945698A1 - Multispectral camouflage device for exhaust fumes of a military vehicle - Google Patents

Multispectral camouflage device for exhaust fumes of a military vehicle Download PDF

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Publication number
EP0945698A1
EP0945698A1 EP99400575A EP99400575A EP0945698A1 EP 0945698 A1 EP0945698 A1 EP 0945698A1 EP 99400575 A EP99400575 A EP 99400575A EP 99400575 A EP99400575 A EP 99400575A EP 0945698 A1 EP0945698 A1 EP 0945698A1
Authority
EP
European Patent Office
Prior art keywords
masking device
foam material
layer
fabric
military vehicle
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
EP99400575A
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German (de)
French (fr)
Other versions
EP0945698B1 (en
Inventor
Sylvain Carlier
Fabrice Fontaine
Jean Cottet Dumoulin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Giat Industries SA
Original Assignee
Giat Industries SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Giat Industries SA filed Critical Giat Industries SA
Publication of EP0945698A1 publication Critical patent/EP0945698A1/en
Application granted granted Critical
Publication of EP0945698B1 publication Critical patent/EP0945698B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
    • F41H7/00—Armoured or armed vehicles
    • F41H7/02—Land vehicles with enclosing armour, e.g. tanks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
    • F41H3/00—Camouflage, i.e. means or methods for concealment or disguise

Definitions

  • the technical sector of the present invention is that devices to mask emissions from hot springs of a combat vehicle.
  • the invention aims to decrease considerably the infrared and radar emission of a military vehicle to make it more difficult detectable by the emission of its exhaust gases.
  • the subject of the invention is therefore a device for masking the exhaust gases of a military vehicle with respect to an infrared or radar sensor, characterized in that it comprises a rigid frame and a flexible multispectral veil, the frame receiving two side walls and an upper wall, the web being made of a foam material on which a flame retardant fabric is applied and being connected to the rigid frame by fixing means.
  • the fixing means consist of a set of arms each articulated with respect to the frame.
  • the foam material consists of polyethylene.
  • Electromagnetic shielding is applied to one side of the foam material.
  • the shielding is in the form of a metal grid, for example a net or a canvas.
  • a layer of waterproof flame retardant textile fabric is applied to each side of the foam material.
  • a reflective layer of infrared radiation is arranged on one of the layers of fabric.
  • the foam material has a thickness of the order of 2 cm and a low density, of the order of 50 to 150 kg / m 3 .
  • a very first advantage of the invention lies in the negligible impact of the device on the mass and size of the vehicle.
  • Another advantage of the invention lies in the use of a commercially available product including we modify the multispectral masking properties by addition of layers of suitable material.
  • Yet another advantage is the use of the flexibility of the flexible material without degrading vehicle environment and mobility.
  • FIG. 1 the rear part of a military vehicle 1 whose exhaust gases from its engine are ejected via a tube 2.
  • a masking device 3 is fixed at the rear, according to the Figures 1 and 2, to deflect the gases to the ground.
  • the device 3 consists of a rigid frame 4 receiving two side walls 5a and 5b and a wall upper 6.
  • the fixing of the walls and the veil can be permanent (glue, staples, rivets) or removable (screws, wall hook type Velcro, registered trademark).
  • Wall 6 can be made up of one or more panels.
  • All reinforcement / side walls / top wall constitutes a rigid structure or cage on which one comes to fix a flexible veil 7 by means of a fixing means 8.
  • This means 8 is here constituted by a set of arms 9 each articulated with respect to the rigid frame 4 around a hinge 10. Each arm can be rigid or flexible.
  • the hinge can be fitted with a return spring to constantly bring the arm towards the vehicle 1.
  • Isolation of the cage can be improved by applying panels 15, 16 and 17 respectively on faces 5a, 5b and 6 likewise nature than the veil 7.
  • FIG 3 there is shown a cross section of the veil 7 and we see that it is made of a flexible material composed of several layers.
  • the main element of this veil consists of a layer of foam material 11, for example polyethylene, on which is applied according to the invention on one side a layer 12 of fireproof and waterproof textile fabric and on the other side first electromagnetic shielding 13, then a layer 14 of fireproof and waterproof textile fabric, then finally a layer 15 reflecting infrared radiation.
  • the latter may be in the form of a layer of metallized paint, a metallic film or a metallized plastic film.
  • the shield 13 may be a metal grid in the form of a net or a canvas of metal wires, for example stainless steel, bronze or copper, the mesh of which is adapted to the frequency of the radar emission to be processed. An electromagnetic barrier to radar emissions is thus produced.
  • the foam material 11 is made of a very light material in the form of a plate approximately 2 cm thick with a low density, of the order of 50 to 150 kg / m 3 .
  • the layer 12 or 14 of textile fabric can be dyed with paints meeting the requirements of the NATO or GAM C specifications, stealth paints in the infrared (bands II and III) in order to ensure a variegation in the visible and the infrared . A flexible multispectral material is thus obtained.
  • the veil 7 is fixed on the arms 9 by arranging the face metallized towards the vehicle and constitutes an excellent barrier to infrared exhaust emissions from vehicle and an electromagnetic trap for radiation radar detectors. This keeps all the flexibility of the web 7 as well as its mechanical characteristics. Of more, the masking device thus produced respects the environmental and mobility constraints of the vehicle military by offering completely multispectral masking satisfactory. Of course, given the density of the material, there is only a small impact on the mass of the vehicle.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Optical Radar Systems And Details Thereof (AREA)

Abstract

The mask (3) consists of a rigid frame (4) with side (5a,5b) and top (6) panels, and a supple multi-spectral curtain (7) made from a foam material with a fire-resistant layer attached. The curtain is attached to the rigid frame by fastenings (8) with pivoted arms (9), and one of its faces has an electromagnetic armored layer e.g. of metal mesh. A fire-resistant fabric layer can be attached to both surfaces of the curtain, with one having an infrared reflective layer attached to it.

Description

Le secteur technique de la présente invention est celui des dispositifs permettant de masquer les émissions des sources chaudes d'un véhicule de combat.The technical sector of the present invention is that devices to mask emissions from hot springs of a combat vehicle.

On sait qu'un char de combat peut être repéré par ses émissions radar et infrarouge grâce à des moyens de détection appropriés. Très peu de travaux ont été réalisés au niveau de l'éjection des gaz d'échappement et on a pensé jusqu'ici à simplement jouer sur l'orientation de la sortie de ces gaz. L'arrivée sur le marché de détecteurs plus performants oblige les concepteurs de véhicules militaires à revoir les problèmes d'émission infrarouge et radar de ces véhicules.We know that a battle tank can be spotted by its radar and infrared emissions thanks to means of appropriate detection. Very little work has been done at the exhaust gas ejection and we thought so far just play on the orientation of the exit of these gases. The arrival on the market of more detectors performance forces military vehicle designers to review the infrared and radar emission problems of these vehicles.

C'est pourquoi l'invention vise à diminuer considérablement l'émission infrarouge et radar d'un véhicule militaire afin de le rendre plus difficilement détectable par l'émission de ses gaz d'échappement.This is why the invention aims to decrease considerably the infrared and radar emission of a military vehicle to make it more difficult detectable by the emission of its exhaust gases.

L'invention a donc pour objet un dispositif de masquage des gaz d'échappement d'un véhicule militaire vis-à-vis d'un capteur infrarouge ou radar, caractérisé en ce qu'il comprend une armature rigide et un voile souple multispectral, l'armature recevant deux parois latérales et une paroi supérieure, le voile étant constitué par un matériau mousse sur lequel est appliqué un tissu ignifugé et étant relié à l'armature rigide par des moyens de fixation.
Les moyens de fixation sont constitués par un ensemble de bras chacun articulé par rapport à l'armature.
Le matériau mousse est constitué par du polyéthylène. Un blindage électromagnétique est appliqué sur une face du matériau mousse.
Le blindage se présente sous la forme d'une grille métallique, par exemple un filet ou une toile.The subject of the invention is therefore a device for masking the exhaust gases of a military vehicle with respect to an infrared or radar sensor, characterized in that it comprises a rigid frame and a flexible multispectral veil, the frame receiving two side walls and an upper wall, the web being made of a foam material on which a flame retardant fabric is applied and being connected to the rigid frame by fixing means.
The fixing means consist of a set of arms each articulated with respect to the frame.
The foam material consists of polyethylene. Electromagnetic shielding is applied to one side of the foam material.
The shielding is in the form of a metal grid, for example a net or a canvas.

Une couche de tissu textile ignifugé étanche est appliquée sur chacune des faces du matériau mousse. A layer of waterproof flame retardant textile fabric is applied to each side of the foam material.

Une couche réflectrice du rayonnement infrarouge est disposée sur une des couches de tissu.A reflective layer of infrared radiation is arranged on one of the layers of fabric.

Le matériau mousse présente une épaisseur de l'ordre de 2 cm et une densité faible, de l'ordre de 50 à 150 kg/m3. Un tout premier avantage de l'invention réside dans l'impact négligeable du dispositif sur la masse et l'encombrement du véhicule.The foam material has a thickness of the order of 2 cm and a low density, of the order of 50 to 150 kg / m 3 . A very first advantage of the invention lies in the negligible impact of the device on the mass and size of the vehicle.

Un autre avantage de l'invention réside dans l'utilisation d'un produit disponible dans le commerce dont on modifie les propriétés de masquage multispectral par adjonction de couches de matériau approprié.Another advantage of the invention lies in the use of a commercially available product including we modify the multispectral masking properties by addition of layers of suitable material.

Un autre avantage encore réside dans l'utilisation de la souplesse du matériau souple sans dégrader l'environnement et la mobilité du véhicule.Yet another advantage is the use of the flexibility of the flexible material without degrading vehicle environment and mobility.

D'autres caractéristiques, avantages et détails de l'invention apparaítront plus clairement à la lecture du complément de description qui va suivre d'un mode de réalisation donné à titre d'exemple en relation avec des dessins sur lesquels :

  • la figure 1 est une vue de la partie arrière d'un véhicule montrant l'implantation du dispositif selon l'invention,
  • la figure 2 est une vue éclatée du dispositif de masquage,
  • la figure 3 est une coupe du matériau souple multicouche utilisé dans l'invention.
    □
Other characteristics, advantages and details of the invention will appear more clearly on reading the additional description which follows of an embodiment given by way of example in relation to the drawings in which:
  • FIG. 1 is a view of the rear part of a vehicle showing the installation of the device according to the invention,
  • FIG. 2 is an exploded view of the masking device,
  • Figure 3 is a section of the multilayer flexible material used in the invention.
    □

On a représenté sur la figure 1 la partie arrière d'un véhicule militaire 1 dont les gaz d'échappement de son moteur sont éjectés par l'intermédiaire d'un tube 2. Pour diminuer l'émissivité infrarouge et radar de ce véhicule, on fixe à l'arrière un dispositif de masquage 3, selon les figures 1 et 2, permettant de dévier les gaz vers le sol. Le dispositif 3 est constitué d'une armature rigide 4 recevant deux parois latérales 5a et 5b et une paroi supérieure 6. La fixation des parois et du voile peut être permanente (colle, agrafes, rivets) ou démontable (vis, accrochage du type Velcro, marque déposée).La paroi 6 peut être constituée de un ou plusieurs panneaux. L'ensemble armature/parois latérales/paroi supérieure constitue une structure rigide ou cage sur laquelle on vient fixer un voile souple 7 par l'intermédiaire d'un moyen de fixation 8. Ce moyen 8 est ici constitué par un ensemble de bras 9 chacun articulé par rapport à l'armature rigide 4 autour d'une charnière 10. Chaque bras peut être rigide ou souple. La charnière peut être munie d'un ressort de rappel pour ramener constamment le bras vers le véhicule 1. Sur la figure 1, on voit que l'on dispose le long du bord libre de l'armature 4 un certain nombre de bras 8 sur lesquels on va fixer par tout moyen connu le voile souple 7 soit en une seule longueur soit en plusieurs panneaux. L'isolation de la cage peut être améliorée en appliquant des panneaux 15, 16 et 17 respectivement sur les faces 5a, 5b et 6 de même nature que le voile 7.There is shown in Figure 1 the rear part of a military vehicle 1 whose exhaust gases from its engine are ejected via a tube 2. To reduce the infrared and radar emissivity of this vehicle, a masking device 3 is fixed at the rear, according to the Figures 1 and 2, to deflect the gases to the ground. The device 3 consists of a rigid frame 4 receiving two side walls 5a and 5b and a wall upper 6. The fixing of the walls and the veil can be permanent (glue, staples, rivets) or removable (screws, wall hook type Velcro, registered trademark). Wall 6 can be made up of one or more panels. All reinforcement / side walls / top wall constitutes a rigid structure or cage on which one comes to fix a flexible veil 7 by means of a fixing means 8. This means 8 is here constituted by a set of arms 9 each articulated with respect to the rigid frame 4 around a hinge 10. Each arm can be rigid or flexible. The hinge can be fitted with a return spring to constantly bring the arm towards the vehicle 1. On the Figure 1, we see that we have along the free edge of the armature 4 a certain number of arms 8 on which we are going fix the flexible veil 7 by any known means, either in single length be in several panels. Isolation of the cage can be improved by applying panels 15, 16 and 17 respectively on faces 5a, 5b and 6 likewise nature than the veil 7.

Sur la figure 3, on a représenté une coupe transversale du voile 7 et on voit que celui-ci est constitué d'un matériau souple composé de plusieurs couches. L'élément principal de ce voile est constitué par une couche d'un matériau mousse 11, du polyéthylène par exemple, sur laquelle on applique selon l'invention sur une face une couche 12 de tissu textile ignifugé et étanche et sur l'autre face d'abord un blindage électromagnétique 13, puis une couche 14 de tissu textile ignifugé et étanche, puis enfin une couche 15 réflectrice du rayonnement infrarouge. Cette dernière peut se présenter sous la forme d'une couche de peinture métallisée, d'un film métallique ou d'un film plastique métallisé. Le blindage 13 peut être une grille métallique se présentant sous la forme d'un filet ou d'une toile de fils métalliques, par exemple d'acier inox, de bronze ou de cuivre, dont la maille est adaptée à la fréquence de l'émission radar à traiter. On réalise ainsi une barrière électromagnétique aux émissions radar. Le matériau mousse 11 est en une matière très légère se présentant sous la forme d'une plaque de 2 cm d'épaisseur environ avec une densité faible, de l'ordre de 50 à 150 kg/m3. La couche 12 ou 14 de tissu textile peut être teintée avec des peintures répondant aux exigences des spécifications OTAN ou GAM C, des peintures furtives dans l'infrarouge (bandes II et III) afin d'assurer un bariolage dans le visible et l'infrarouge. On obtient ainsi un matériau souple multispectral.In Figure 3, there is shown a cross section of the veil 7 and we see that it is made of a flexible material composed of several layers. The main element of this veil consists of a layer of foam material 11, for example polyethylene, on which is applied according to the invention on one side a layer 12 of fireproof and waterproof textile fabric and on the other side first electromagnetic shielding 13, then a layer 14 of fireproof and waterproof textile fabric, then finally a layer 15 reflecting infrared radiation. The latter may be in the form of a layer of metallized paint, a metallic film or a metallized plastic film. The shield 13 may be a metal grid in the form of a net or a canvas of metal wires, for example stainless steel, bronze or copper, the mesh of which is adapted to the frequency of the radar emission to be processed. An electromagnetic barrier to radar emissions is thus produced. The foam material 11 is made of a very light material in the form of a plate approximately 2 cm thick with a low density, of the order of 50 to 150 kg / m 3 . The layer 12 or 14 of textile fabric can be dyed with paints meeting the requirements of the NATO or GAM C specifications, stealth paints in the infrared (bands II and III) in order to ensure a variegation in the visible and the infrared . A flexible multispectral material is thus obtained.

Le voile 7 est fixé sur les bras 9 en disposant la face métallisée vers le véhicule et constitue une excellente barrière aux émissions infrarouge des gaz d'échappement du véhicule et un piège électromagnétique pour le rayonnement radar des détecteurs. On conserve ainsi toute la souplesse du voile 7 ainsi que ses caractéristiques mécaniques. De plus, le dispositif de masquage ainsi réalisé respecte les contraintes d'environnement et de mobilité du véhicule militaire en offrant un masquage multispectral tout à fait satisfaisant. Bien entendu, étant donné la densité du matériau, il n'y a qu'un faible impact sur la masse du véhicule.The veil 7 is fixed on the arms 9 by arranging the face metallized towards the vehicle and constitutes an excellent barrier to infrared exhaust emissions from vehicle and an electromagnetic trap for radiation radar detectors. This keeps all the flexibility of the web 7 as well as its mechanical characteristics. Of more, the masking device thus produced respects the environmental and mobility constraints of the vehicle military by offering completely multispectral masking satisfactory. Of course, given the density of the material, there is only a small impact on the mass of the vehicle.

Claims (8)

Dispositif de masquage (3) des gaz d'échappement d'un véhicule militaire (1) vis-à-vis d'un capteur infrarouge ou radar, caractérisé en ce qu'il comprend une armature rigide (4) et un voile souple multispectral (7), l'armature recevant deux parois latérales (a, b) et une paroi supérieure (6), le voile étant constitué par un matériau mousse (11) sur lequel et appliqué un tissu ignifugé et étant relié à la structure rigide (4) par des moyens de fixation (8).Exhaust gas masking device (3) a military vehicle (1) with respect to a sensor infrared or radar, characterized in that it comprises a rigid frame (4) and a flexible multispectral veil (7), the frame receiving two side walls (a, b) and one upper wall (6), the web being constituted by a foam material (11) on which a fabric is applied flame retardant and being connected to the rigid structure (4) by fixing means (8). Dispositif de masquage selon la revendication 1, caractérisé en ce que les moyens de fixation (8) sont constitués par un ensemble de bras (9) articulés par rapport à l'armature (4).Masking device according to claim 1, characterized in that the fixing means (8) are constituted by a set of arms (9) articulated by relative to the frame (4). Dispositif de masquage selon la revendication 1 ou 2, caractérisé en ce que le matériau mousse (11) est constitué par du polyéthylène.Masking device according to claim 1 or 2, characterized in that the foam material (11) is consisting of polyethylene. Dispositif de masquage selon l'une quelconque des revendications 1 à 3, caractérisé en ce qu'un blindage électromagnétique (13) est appliqué sur une face du matériau mousse (11).Masking device according to any one of Claims 1 to 3, characterized in that shielding electromagnetic (13) is applied to one side of the foam material (11). Dispositif de masquage selon la revendication 4, caractérisé en ce que le blindage (13) se présente sous la forme d'une grille métallique (13), par exemple un filet ou une toile.Masking device according to claim 4, characterized in that the shield (13) is present under the in the form of a metal grid (13), for example a net or a Web. Dispositif de masquage selon l'une quelconque des revendications précédentes, caractérisé en ce qu'une couche (12, 14) de tissu textile ignifugé étanche est appliquée sur chacune des faces du matériau mousse (11).Masking device according to any one of previous claims, characterized in that a layer (12, 14) waterproof flame retardant textile fabric is applied on each side of the foam material (11). Dispositif de masquage selon la revendication 6, caractérisé en ce qu'une couche (15) réflectrice du rayonnement infrarouge est disposée sur une des couches de tissu (12, 14).Masking device according to claim 6, characterized in that a reflective layer (15) of the infrared radiation is arranged on one of the layers of fabric (12, 14). Dispositif de masquage selon l'une quelconque des revendications précédentes, caractérisé en ce que le matériau mousse présente une épaisseur de l'ordre de 2 cm et une densité faible, de l'ordre de 50 à 150 kg/m3.Masking device according to any one of the preceding claims, characterized in that the foam material has a thickness of the order of 2 cm and a low density, of the order of 50 to 150 kg / m 3 .
EP19990400575 1998-03-26 1999-03-10 Multispectral camouflage device for exhaust fumes of a military vehicle Expired - Lifetime EP0945698B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9803721 1998-03-26
FR9803721A FR2776766B1 (en) 1998-03-26 1998-03-26 FLEXIBLE DEVICE FOR MULTISPECTRAL MASKING OF EXHAUST GASES OF A MILITARY VEHICLE

Publications (2)

Publication Number Publication Date
EP0945698A1 true EP0945698A1 (en) 1999-09-29
EP0945698B1 EP0945698B1 (en) 2002-06-12

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EP19990400575 Expired - Lifetime EP0945698B1 (en) 1998-03-26 1999-03-10 Multispectral camouflage device for exhaust fumes of a military vehicle

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EP (1) EP0945698B1 (en)
DE (1) DE69901749T2 (en)
FR (1) FR2776766B1 (en)

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RU2750917C1 (en) * 2020-07-23 2021-07-06 Федеральное государственное казенное военное образовательное учреждение высшего образования "Рязанское гвардейское высшее воздушно-десантное ордена Суворова дважды Краснознаменное командное училище имени генерала армии В.Ф. Маргелова" Министерства обороны Российской Федерации Device for reducing the thermal and acoustic visibility of lightly armored vehicles

Citations (6)

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RU2521795C1 (en) * 2013-06-17 2014-07-10 Александр Дмитриевич Савчук Cable-type concealing long-span structure
RU189602U1 (en) * 2019-02-20 2019-05-28 Федеральное государственное бюджетное учреждение "Центральный научно-исследовательский испытательный институт инженерных войск" Министерства обороны Российской Федерации DEVICE FOR MASKING ARMS
CN116067230A (en) * 2022-10-31 2023-05-05 重庆长安工业(集团)有限责任公司 Adaptive matching camouflage protection scheme

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DE69901749T2 (en) 2003-01-30
DE69901749D1 (en) 2002-07-18
FR2776766B1 (en) 2000-08-18
FR2776766A1 (en) 1999-10-01
EP0945698B1 (en) 2002-06-12

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