EP0916921B1 - Munition zum Wegräumen von Minen - Google Patents

Munition zum Wegräumen von Minen Download PDF

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Publication number
EP0916921B1
EP0916921B1 EP98120292A EP98120292A EP0916921B1 EP 0916921 B1 EP0916921 B1 EP 0916921B1 EP 98120292 A EP98120292 A EP 98120292A EP 98120292 A EP98120292 A EP 98120292A EP 0916921 B1 EP0916921 B1 EP 0916921B1
Authority
EP
European Patent Office
Prior art keywords
projectile
demining
sub
projectiles
ammunition
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
EP98120292A
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English (en)
French (fr)
Other versions
EP0916921A1 (de
Inventor
Didier Roger
Ghislain Hervieu
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
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Giat Industries SA
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Filing date
Publication date
Application filed by Giat Industries SA filed Critical Giat Industries SA
Publication of EP0916921A1 publication Critical patent/EP0916921A1/de
Application granted granted Critical
Publication of EP0916921B1 publication Critical patent/EP0916921B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F41H11/00—Defence installations; Defence devices
    • F41H11/12—Means for clearing land minefields; Systems specially adapted for detection of landmines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B12/00—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material
    • F42B12/02—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect
    • F42B12/36—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect for dispensing materials; for producing chemical or physical reaction; for signalling ; for transmitting information

Definitions

  • the technical field of the invention is that of demining ammunition, especially for landmines.
  • Demining ammunition makes it possible to carry out safety distance clearing a passage in a field of mines.
  • Known demining munitions include generally an explosive charge which is initiated at vicinity of the mines so as to cause the detonation of these latest.
  • Patent US4776255 thus describes a projectile self-propelled which deploys a detonating cord on its trajectory. The line is initiated when it comes into contact with the ground.
  • New generation anti-tank mines are usually equipped with a magnetic sensor igniter which allows them to detect the approach of the ferro mass important magnetic formed by a tank or a vehicle.
  • Known demining systems that initiate remotely such mines include a generator electromagnetic integral with a vehicle and which projects into before the latter a magnetic signature close to that of a tank.
  • Patent FR2701105 describes such a demining system.
  • the patent US5192827 proposes a projectile which can generate an electromagnetic pulse, especially micro wave or radio frequency, in the vicinity of a target. He puts in work one which is charged with current before the shoot. Such a projectile is also used complex.
  • Patent DE2455769 describes a system for destroying land mines which uses a conductive net connected to a electric generator.
  • the net can optionally be dispersed by rocket.
  • the implementation of such a projectile is also complex because it requires the use of a electric generator and making connections electric.
  • patent US4562789 shows a demining system of naval mines which is constituted by a torpedo carrying permanent magnets in the form of rotating discs driven by control motors.
  • the shape of the field is modulated by playing on the relative rotational speeds of different discs.
  • Such a device is complex and bulky and it is totally unsuitable for an operation of land clearance.
  • the ammunition according to the invention is of design simple and inexpensive because it does not implement any on-board or off-shore electrical energy. So she can be provided as an endowment to all combat vehicles for enable them to ensure their self-protection against mines.
  • the subject of the invention is a demining munition, especially for landmines, and including at least a projectile launched by a propellant charge, and containing at least one magnetic field generator, ammunition characterized in that the projectile comprises dispersing means enabling the trajectory to be released or the magnetic field generators that are made up by magnetized sub-projectiles.
  • the sub-projectiles may be in the form of beads or have two conical ends.
  • the sub-projectiles may include a magnetic material core coated with a plastic envelope.
  • the material of the magnetic core or sub-projectile may have a coercive field greater than 40,000 A / m and a residual field greater than 0.8 Tesla.
  • the material of the core or of the sub-projectile magnetized will be chosen from the following materials: AlNiCo V, SmCo5, Neodymium.
  • the plastic of the envelope coating the core is colored and / or fluorescent.
  • the projectile will include at least one housing or container containing the sub-projectiles, the dispersing means being constituted by an explosive charge of dispersion arranged at the axis of the housing or container.
  • the ammunition may include at least two projectiles placed in a launch tube intended for be secured to a shooting platform, tube containing an ejection charge.
  • a demining munition according to a first embodiment of the invention comprises a propellant charge (not shown) and a projectile 1.
  • the projectile here is an artillery or mortar and its propellant charge will for example be contained in a socket or a gargousse.
  • the projectile 1 comprises a body 2 on which are fixed by threading or riveting a warhead 3 and a base 4.
  • a propellant gas tightness belt 5 is crimped at a rear part of the body 2, and it allows the projectile fire from a weapon system (not shown) like a cannon or a mortar.
  • the warhead 3 carries at its front part a rocket chronometric 6 programmable, mechanical or electronic. This rocket is intended to initiate a gas-generating pyrotechnic composition 7.
  • the body 2 of the projectile contains generating means magnetic field 8, which will be described below, as well than a push piston 19.
  • the magnetic field generating means are constituted by magnetic sub-projectiles having the shape of balls (approximately 140 balls of 12 mm in diameter).
  • Figure 3 shows such a sub-projectile 9 in section. he has a parallelepipedic core 10 (here for example cubic) made of a magnetic material generating a magnetic field of significant intensity, core coated by an envelope 11 in plastic material (for example a deformable polymer such as rubber).
  • a parallelepipedic core 10 here for example cubic
  • plastic material for example a deformable polymer such as rubber
  • Each ball has a diameter of 10 to 20 mm, the side of the cube is between 8 mm and 12 mm.
  • the magnetic material will be chosen so that it has a coercive field greater than 40,000 A / m and a field residual greater than 0.8 Tesla.
  • the envelope 11 has the function of absorbing the shocks received by the nucleus, both when firing the projectile and when there dispersion of sub-projectiles. By its deformability it also allows for the placement of sub-projectiles without play in the body of the projectile, the sub-projectiles being then kept slightly compressed between pellet 4 and piston 19.
  • the envelope can advantageously be produced in one colored or phosphorescent plastic, we will ensure thus marking the demined area of land.
  • the chronometric rocket 6 After identifying an area of land to be cleared and evaluation of its distance, we program in a known manner the chronometric rocket 6 (manually or with a programming not shown) by introducing into it data relating to the moment at which the dispersion must be ordered from the moment of firing. This moment depends on the characteristics of the shot (speeds and angles of shooting) and it is given by a shooting table.
  • a firing platform launches projectile 1 towards of the area to be cleared.
  • rocket 6 initiates the means of dispersion constituted by the pyrotechnic charge 7.
  • the gas pressure generated pushes the piston 19 which exerts pressure on the base 4 by means of the balls 9 forming the means field generators 8.
  • the means of securing the base and the body 2 is sheared and the balls 9 are scattered over the area to clear.
  • the speeds of the different balls are variable in intensity and orientation and their relative positioning is also variable. This results in a magnetic field global generated by the set of balls which is variable in orientation. The level of this field is sufficient to trigger most igniter mines passive.
  • the variability of the field also makes it difficult the design of a mine igniter hardened to this type of decoy.
  • Figure 2 shows another embodiment of a demining ammunition according to the invention.
  • This mode differs from the previous one in that the body 2 of the projectile 1 contains, not a stack of balls, but a container 12 formed of a metal envelope 13 closed at each end by a cover 14a, 14b.
  • the cover 14b carries a delay igniter 15 which is connected by a connection 16 to the rocket 6.
  • the igniter 15 is connected to an explosive charge of dispersion 17 arranged in a sheath coaxial with the container 12.
  • the dispersion charge will for example be a charge combining aluminum and potassium perchlorate.
  • Container 12 contains a field generator magnetic 8 formed by a stack of magnetic beads as previously described.
  • rocket 6 causes on the one hand the initiation of the pyrotechnic charge 7 and on the other hand (via of connection 16) that of the pyrotechnic delay of the delay igniter 15.
  • the gas pressure pushes the piston 19 which ejects the base 4 and container 12.
  • each container 12 will contain balls magnetized and an explosive charge of dispersion initiated by a pyrotechnic delay. This will result in better spatial distribution of logs.
  • Figure 4 shows ammunition according to a third mode for carrying out the invention.
  • This ammunition 101 includes a case 102 which carries the level of a rear part 102 has a base 103 carrying a radial lug 104 which allows the munition to be fixed by a bayonet mount on a launcher (not shown) which is integral with a structure such as a vehicle or a fixed structure.
  • the case 102 is closed at its front part by a plug 120 secured to the case by at least one pin radial 121.
  • the case 102 has a rear flange 102b which is pinched between a shoulder of the base 103 and a nut 105 screwed to the base.
  • the base 103 carries an electric igniter 106 fixed on a support 107 glued to the base 103.
  • the electrical wires of the igniter 106 are connected to an axial contact 108 on the one hand and on the base 103 on the other hand, the axial contact being isolated electrically from the base.
  • the support 107 contains a pyrotechnic ejection charge 109 which consists of for example by a propellant powder or an ignition powder.
  • the case 102 also contains a piston 110 on which a stack of two mine clearance projectiles is placed 111a, 111b.
  • the piston 110 has a diameter smaller than that of the case 102 and is supported on a counterbore arranged at the rear of projectile 111a.
  • the case 102 thus constitutes a launching tube for the projectiles 111, the ejection charge 109 being intended to generate gases which will be applied to the piston 110 which will push the projectiles out of the holster.
  • Each projectile 111 is formed by a casing cylindrical 112 for example made of aluminum and which is closed by a bottom 114 and a cover 113 screwed.
  • the bottom 114 carries an axial housing which receives a plug ignition 116 comprising a pyrotechnic composition with delay.
  • An explosive charge of dispersion 117 is placed in a plastic sheath 118 coaxial with the housing 112.
  • the case also contains a magnetic generator formed by a stack of balls of the type described previously (approximately 70 balls of diameter 12 mm per housing).
  • each projectile 111 is positioned set back from the rear end of the housing.
  • a such an arrangement allows, on the one hand, a bedroom 122a between the rear projectile 111a and the piston 110, and on the other hand a chamber 122b between the two projectiles 111a and 111b.
  • each projectile has two notches radials 123 arranged at its rear part (see FIG. 5) and the casing 112a of the rear projectile 111a also has two longitudinal grooves 119 along two generators.
  • the notches 123 of the rear projectile make it possible to pass part of the propellant gases generated by the ejection charge 109 to chamber 122a and the igniter to delay of the rear projectile 111a.
  • the longitudinal grooves 119 also pass a part of the propellant gases towards the chamber 122b separating the two projectiles 111a and 111b, this through the notches 123 arranged on the housing 112b of the front projectile 111b.
  • the propellants therefore also ignite the delay pyrotechnic compositions of the two projectiles, these compositions will ensure the initiation on trajectory of dispersion charges 117.
  • These grooves 119 are calibrated so as to allow passage enough gas to ignite the delay and avoid a too much pressure between the two projectiles which would brake the rear projectile.
  • the case 102 of the ammunition is fixed to a launcher 124 secured to a vehicle or structure 125.
  • the ejection charge When firing the ammunition the ejection charge is initiated and it causes the lid 120 to open, the ignition of the delays 116 and the expulsion of the two projectiles 111a, 111b.
  • the heights H1 and H2 relative on the ground are substantially the same and close to 3 m.
  • the logs are then distributed over the ground over an area of around 200 m 2 .
  • a vehicle equipped with such a munitions launcher clearance can therefore easily ensure the clearance of passages about 10 m wide by 20 m long.
  • the launcher and the ammunition are light and little expensive that can equip any type of vehicle, from tank to light infantry vehicle. Launchers adapted to these ammunition is already in service on many vehicles and allow the dispersal of smoke ammunition or close defense grenades. Demining ammunition according to the invention therefore makes it possible to endow easily and inexpensively these vehicles with quick demining capability and that is also more effective than pyrotechnical deminers against new generation mines.
  • Figure 7 shows another embodiment of a magnetic sub-projectile 9.
  • This sub-projectile differs from that of Figure 3 in that that the core 10 is a rectangular parallelepiped and the casing 11 is formed of a central cylindrical part 11a to which two conical ends 11b are connected and 11c.
  • the axis 19 of the conical ends and of the part cylindrical of the casing 11 is perpendicular to the direction 20 of a great length 21 of the core 10.
  • the magnet formed by the core 10 has its north poles (N) and south (S) located on either side of axis 19 of envelope 11.
  • Such sub-projectiles are arranged in a projectile as described with reference to Figures 1, 2 or 4 with their axes 19 all parallel to each other and parallel to the axis of the carrying projectile (1 or 111).
  • the rotation around the axis 19 causes a variation of the orientation of the magnetic field generated by each core 10. This improves the effectiveness of mine clearance.
  • sub-projectiles for example define a sub-projectile with two ends conical connecting at their large bases (a projectile according to figure 7 devoid of cylindrical part 11a).

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Lubricants (AREA)
  • Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Photoreceptors In Electrophotography (AREA)
  • Threshing Machine Elements (AREA)
  • Toys (AREA)

Claims (9)

  1. Munition zum Räumen von Minen, insbesondere von Landminen, welche wenigstens ein mittels einer Treibladung abgefeuertes Geschoss (1, 111a, 111b) umfasst und wenigstens einen Magnetfelderzeuger (8) enthält, wobei die Munition dadurch gekennzeichnet ist, dass das Geschoss (1, 111a, 111b) Mittel zur Streuung (7, 17, 117) umfasst, welche es ermöglichen, den oder die Magnetfelderzeuger, die aus magnetischen Teilgeschossen (9) bestehen, auf der Flugbahn freizugeben.
  2. Munition zum Räumen von Minen nach Anspruch 1, dadurch gekennzeichnet, dass die Teilgeschosse (9) kugelförmig sind.
  3. Munition zum Räumen von Minen nach Anspruch 1, dadurch gekennzeichnet, dass die Teilgeschosse (9) zwei konische Enden besitzen.
  4. Munition zum Räumen von Minen nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Teilgeschosse (9) einen, von einer Plastikhülle (11) ummantelten Kern (10) aus magnetischem Material besitzen.
  5. Munition zum Räumen von Minen nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass das Material des Kerns (10) oder des magnetischen Teilgeschosses (9) ein hohes Koerzitivfeld von 40000 A/m und eine hohe Remanenz von 0,8 Tesla auf weist.
  6. Munition zum Räumen von Minen nach Anspruch 5, dadurch gekennzeichnet, dass das Material des Kerns oder des magnetischen Teilgeschosse's aus den folgenden Materialien ausgewählt wird: AlNiCo V, SmCo5, Neodym.
  7. Munition zum Räumen von Minen nach einem der Ansprüche 4 bis 6, dadurch gekennzeichnet, dass die Plastikhülle (11) gefärbt und/oder fluoreszierend ist.
  8. Munition zum Räumen von Minen nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass das Geschoss wenigstens ein Gehäuse oder einen Behälter (12, 112) enthält, welches oder welcher die Teilgeschosse (9) enthält, wobei die Mittel zur Streuung aus einem Streusprengsatz (17, 117) bestehen, welcher auf Höhe der Achse des Gehäuses oder des Behälters angeordnet ist.
  9. Munition nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass sie wenigstens zwei in einem mit einer Abschussplattform fest verbundenem Abschussrohr (102) angeordnete Geschosse (111a, 111b) umfasst, wobei das Rohr eine Ausstoßladung (109) enthält.
EP98120292A 1997-11-14 1998-10-27 Munition zum Wegräumen von Minen Expired - Lifetime EP0916921B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9714327A FR2771165B1 (fr) 1997-11-14 1997-11-14 Munition de deminage
FR9714327 1997-11-14

Publications (2)

Publication Number Publication Date
EP0916921A1 EP0916921A1 (de) 1999-05-19
EP0916921B1 true EP0916921B1 (de) 2003-01-22

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ID=9513401

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Application Number Title Priority Date Filing Date
EP98120292A Expired - Lifetime EP0916921B1 (de) 1997-11-14 1998-10-27 Munition zum Wegräumen von Minen

Country Status (5)

Country Link
EP (1) EP0916921B1 (de)
AT (1) ATE231606T1 (de)
CA (1) CA2251975A1 (de)
DE (1) DE69810877T2 (de)
FR (1) FR2771165B1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2372235A (en) 2001-02-16 2002-08-21 Secr Defence Mine neutralisation device
US6540175B1 (en) * 2001-12-03 2003-04-01 Lockheed Martin Corporation System for clearing buried and surface mines

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2455769A1 (de) * 1974-11-26 1976-08-12 Licentia Gmbh Vorrichtung zum entminen eines vorgegebenen geografischen gebietes
DE3316005C2 (de) * 1983-05-03 1987-04-09 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Anordnung zur Fernräumung von auf Magnetfelder empfindliche Minen
DE3528338C1 (de) * 1985-08-07 1993-01-28 Messerschmitt Boelkow Blohm Vorrichtung mit schneller Magnetfeldkompression
GB8622646D0 (en) 1986-09-19 1987-02-04 Smith J L C Minefield penetration
US5192827A (en) * 1991-12-19 1993-03-09 The United States Of America As Represented By The Secretary Of The Army Microwave projectile
FR2701105B1 (fr) 1993-02-01 1995-04-14 Giat Ind Sa Dispositif de déminage.
DE19528112C1 (de) * 1995-08-01 1996-12-19 Daimler Benz Aerospace Ag Munition

Also Published As

Publication number Publication date
ATE231606T1 (de) 2003-02-15
CA2251975A1 (fr) 1999-05-14
DE69810877D1 (de) 2003-02-27
FR2771165B1 (fr) 1999-12-31
EP0916921A1 (de) 1999-05-19
DE69810877T2 (de) 2003-11-13
FR2771165A1 (fr) 1999-05-21

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