EP2647947A1 - Schutzvorrichtung gegen Hohlladungen - Google Patents

Schutzvorrichtung gegen Hohlladungen Download PDF

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Publication number
EP2647947A1
EP2647947A1 EP13160146.0A EP13160146A EP2647947A1 EP 2647947 A1 EP2647947 A1 EP 2647947A1 EP 13160146 A EP13160146 A EP 13160146A EP 2647947 A1 EP2647947 A1 EP 2647947A1
Authority
EP
European Patent Office
Prior art keywords
grid
asperities
protective device
mesh
pins
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.)
Withdrawn
Application number
EP13160146.0A
Other languages
English (en)
French (fr)
Inventor
Jean-Christophe Duclos
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.)
Panhard General Defense
Original Assignee
Panhard General Defense
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 Panhard General Defense filed Critical Panhard General Defense
Publication of EP2647947A1 publication Critical patent/EP2647947A1/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • F41H5/00—Armour; Armour plates
    • F41H5/02—Plate construction
    • F41H5/023—Armour plate, or auxiliary armour plate mounted at a distance of the main armour plate, having cavities at its outer impact surface, or holes, for deflecting the projectile
    • F41H5/026—Slat armour; Nets

Definitions

  • the present invention relates to ballistic protection systems against the action of hollow charge projectiles.
  • This type of device mainly concerns military armored vehicles that may be the target of hollow-charge munitions.
  • This ammunition family has at its end a piezoelectric sensor which, on impact, triggers a detonator allowing the firing of the charge. All the power of the explosion is concentrated on a very small surface of the target thus piercing the shields by a jet of molten metal.
  • One of the means commonly used to counter this threat is to equip the periphery of the armored vehicle with a protection consisting of metal grilles.
  • the distance between the cap of the projectile and the inner contour of the mesh must be sufficiently small to cause the short circuit before the impact of the piezoelectric sensor but conversely, the mesh must not be too tight to to limit the probabilities of triggering the ammunition by direct impact of the sensor on the meshes.
  • Grid protection devices incorporate meshes of simple, rectangular or rectangular geometrical shape. rhombus which have areas of lesser efficiency and whose structure can be deformed as the projectile passes without there being any defusing of the load.
  • the present invention proposes to minimize the extent of the risk areas mentioned above, to stiffen the structure of the mesh panels and to limit the impact of the device on the weight of the vehicle.
  • the ballistic protection device comprises a grid mesh which is characterized in that at least one side of the mesh has asperities and the grid is flat and the asperities are located in the plane of the grid.
  • These asperities make it possible to reduce the distance between the cap of the projectile and the outline of the mesh without reducing the size of the stitches and thus without noticeably increasing the weight of the device.
  • the grid and the corrugations are planar because of the industrial manufacturing process: a flat cut in a plate of material. But the asperities are not necessarily coplanar, indeed the system will be more effective if the pins are in the same plane or both pointing towards the outside of the vehicle or the surface to be protected.
  • the asperities consist of corrugations.
  • the undulations can be either wave-shaped waves or crenellations or any other repetitive form. The open area for the load is thus reduced.
  • the asperities consist of pins.
  • the spikes can have different shapes: straight spikes or not, pointed or not, and variable length.
  • the pins are arranged at the top of each undulation.
  • the broken line shape of the two horizontal edges of the mesh outline and the presence of pins located at each point of these edges allow an anticipated and more assured contact with the cap of the projectiles with hollow charge and thus generate more quickly and more surely a short-circuit.
  • the neutralization of the firing of the hollow charge therefore occurs more definitely and sooner thus improving the effective surface of the protective device by reducing the areas of lesser efficiency.
  • the size of the pins will be limited to leave a space between the pins in vis-à-vis.
  • the grid is metallic.
  • the metal must be chosen to allow the short circuit between the head of the hollow charge and the grid.
  • Each grid is manufactured by cutting to ensure the homogeneity and continuity of the material on the entire grid.
  • the grid is made of high elastic limit material.
  • the grid is made of high elastic limit material in order to limit the risk of permanent deformation of the mesh structure at the passage of the projectile.
  • the grid has a rectangular mesh and that the asperities are placed in the longest parts of the rectangular mesh.
  • the rectangular mesh allows to guarantee between the 2 sides of the mesh a minimum distance allowing the cap of the projectile to touch at least one of the 2 edges.
  • the number of short sides must be reduced to the minimum because they cause ballistic holes (risk of direct contact of the piezo firing of the projectile on these edges) and increase the mass of the grid. However, they contribute to stiffen the device.
  • the number of pins on the long edges is sufficient for the probability of contact between the munition and one of the pins is high. We can nevertheless add pins on the short edges.
  • the rectangular mesh is constructed so that the rectangles of the same line are offset from those of adjacent lines.
  • the grid has a thickness of 3 to 8 mm.
  • the thickness remains in all cases low compared to the other dimensions of the grid considered as a whole. This small thickness limits the weight impact of the device on the weight of the vehicle.
  • the invention also relates to a vehicle equipped with the protection device having the characteristics described above.
  • the ballistic protection device 1 in particular of hollow charge illustrated in FIG. figure 1 , consists of one or more grid panels or grid 2 which are juxtaposed or fixed to each other. Said grids are made of high elastic limit material.
  • the grid 2 consists of a mesh with the shortest vertical edges 21 and the longest horizontal edges 20 constituting rectangles 22.
  • each corrugation 200 has at its apex 202 at least one pin 201 (cf. figure 2 ).
  • Each pin 201 is placed either in the plane of the grid as seen in the profile view 4a, or outwardly (towards the projectile) as shown in FIG. figure 4b .
  • Each grid 2 consists of a series of lines 2a, 2b, ..., 2i, 2i + 1 ... superimposed as illustrated figure 1 , each line being constituted of a series of rectangles. Two successive lines 2i and 2i + 1 have series of rectangles 22 offset with respect to each other.
  • rectangles may also be aligned without departing from the scope of the present invention.
  • the grid panels or grid 2 are mounted on vehicles 3, on the side parts, at the front, at the rear or on the roof.
  • the size of the panels can be adapted to the surface to be covered.
  • the mesh panels could be positioned at 90 ° to those described above: the long edges would then be vertical.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
EP13160146.0A 2012-04-04 2013-03-20 Schutzvorrichtung gegen Hohlladungen Withdrawn EP2647947A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1253083A FR2989161B1 (fr) 2012-04-04 2012-04-04 Protection anti-charge creuse.

Publications (1)

Publication Number Publication Date
EP2647947A1 true EP2647947A1 (de) 2013-10-09

Family

ID=46889147

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13160146.0A Withdrawn EP2647947A1 (de) 2012-04-04 2013-03-20 Schutzvorrichtung gegen Hohlladungen

Country Status (2)

Country Link
EP (1) EP2647947A1 (de)
FR (1) FR2989161B1 (de)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR503320A (fr) * 1917-04-25 1920-06-08 Sir W G Armstrong Perfectionnements aux blindages
DE691067C (de) * 1935-06-16 1940-05-16 Trapezdraht Sieb G M B H Aus einem Drahtgeflecht bestehender Schutzschild gegen Geschosse
US20080257141A1 (en) * 2007-04-20 2008-10-23 Medwell Roger Terence Arthur Vehicle armor
US20100294124A1 (en) * 2006-12-22 2010-11-25 Nederlandse Organisatie Voor Toegepast Natuurwetenschappelijk Onderzoek Trio Method and device for protecting objects against rocket propelled grenades (rpgs)
US20110179944A1 (en) * 2008-04-16 2011-07-28 Michael Farinella Low breaking strength vehicle and structure shield net/frame arrangement

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006134407A1 (en) * 2005-06-14 2006-12-21 Soukos Robots S.A. Rocket-propelled grenade protection system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR503320A (fr) * 1917-04-25 1920-06-08 Sir W G Armstrong Perfectionnements aux blindages
DE691067C (de) * 1935-06-16 1940-05-16 Trapezdraht Sieb G M B H Aus einem Drahtgeflecht bestehender Schutzschild gegen Geschosse
US20100294124A1 (en) * 2006-12-22 2010-11-25 Nederlandse Organisatie Voor Toegepast Natuurwetenschappelijk Onderzoek Trio Method and device for protecting objects against rocket propelled grenades (rpgs)
US20080257141A1 (en) * 2007-04-20 2008-10-23 Medwell Roger Terence Arthur Vehicle armor
US20110179944A1 (en) * 2008-04-16 2011-07-28 Michael Farinella Low breaking strength vehicle and structure shield net/frame arrangement

Also Published As

Publication number Publication date
FR2989161A1 (fr) 2013-10-11
FR2989161B1 (fr) 2016-10-28

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