EP1096219A1 - Verfahren und System zur Entdeckung einer nach einem festen oder beweglichen Gegenstand geworfenen Bedrohung - Google Patents

Verfahren und System zur Entdeckung einer nach einem festen oder beweglichen Gegenstand geworfenen Bedrohung Download PDF

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Publication number
EP1096219A1
EP1096219A1 EP00402990A EP00402990A EP1096219A1 EP 1096219 A1 EP1096219 A1 EP 1096219A1 EP 00402990 A EP00402990 A EP 00402990A EP 00402990 A EP00402990 A EP 00402990A EP 1096219 A1 EP1096219 A1 EP 1096219A1
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EP
European Patent Office
Prior art keywords
threat
observation
photo
field
detectors
Prior art date
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Granted
Application number
EP00402990A
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English (en)
French (fr)
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EP1096219B1 (de
Inventor
Gérald Lefebvre
Sylvain Muller
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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Publication date
Application filed by Giat Industries SA filed Critical Giat Industries SA
Publication of EP1096219A1 publication Critical patent/EP1096219A1/de
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41G—WEAPON SIGHTS; AIMING
    • F41G7/00—Direction control systems for self-propelled missiles
    • F41G7/20—Direction control systems for self-propelled missiles based on continuous observation of target position
    • F41G7/22—Homing guidance systems
    • F41G7/224—Deceiving or protecting means

Definitions

  • the present invention relates to a method and system to detect a threat fired at a fixed or mobile object, in particular an ammunition whose trajectory is close of an armored vehicle.
  • a form of protection can consist of attacking the ammunition physically, for example by mechanical effect, nearby of the armored vehicle and just before impact, by projecting towards it vulgarizing elements such as plates or bars.
  • the purpose of this attack is to reduce sufficient ammunition perforation capacity of so that its residual effect is absorbed by the vehicle armor.
  • a known solution consists in using a radar centimeter or millimeter, but this solution has major drawbacks, namely: few accuracy in locating the threat, and the fact that this speed camera is a non-discrete and expensive active element.
  • the object of the invention is to design a method of detection of a threat that can overcome the disadvantages on the one hand, and can be implemented by a reliable and inexpensive system on the other hand.
  • the method consists in defining each field of observation from photo-detectors arranged in lines in a substantially vertical plane by on the one hand, and on the other hand part, to define two vertical planes forming a dihedral and delimiting each field of observation in the form of a angular sector.
  • the method consists in defining each dihedral plan of a field of observation from a pair of arrays or arrays of photo-detectors, these two pairs being located at a distance from each other for that the two fields of observation intercept one with the other.
  • the method also includes identifying the type of the threat by calculating its length taking into account between other of the time required for the threat to cross at minus a field of observation.
  • the method consists in measuring the threat surface temperature to identify it with more precision, especially when the threat is a arrow projectile and for this purpose the process consists of use photo-detector arrays sensitive to different wavelengths in the range of thermal infrared.
  • the system for implementing the method presents in particular the advantage of being not very complex, while with good reliability in the treatment of threats likely to attack the armored vehicle and allowing the latter to be able to retaliate in the more appropriate.
  • a vehicle armored vehicle is likely to be attacked by a threat which can be pulled from a short distance from this vehicle.
  • the armored vehicle is equipped with a system who is able to detect the arrival of the threat, identify it as such, to precisely determine its trajectory and its speed and, if possible, identify it.
  • the arrival of a threat is detected by a process which consists in defining, from the armored vehicle and in front of an area thereof, fields of observation such that the threat must necessarily cross at at least two of these fields CH 1 and CH 2 before reaching said zone of the armored vehicle according to the embodiment illustrated in FIGS. 1 to 3.
  • each bar associated with its optics defines an observation plane. As the two bars delimiting a field of observation are very close, they can be considered as spatially combined. Under these conditions, each observation field CH 1 and CH 2 is delimited by the two faces of a dihedral corresponding to the two observation planes and by the common edge materialized by the bars.
  • Each detector in the array will be able to react as soon as the threat crosses the observation plane of either bar.
  • the two photo-detector arrays associated with the two faces of a dihedral are placed at the level of the common edge of the dihedral, and the two pairs of photo-detector arrays are supported by the object, each located in a plane substantially vertical to the object and arranged so that the two observation fields CH 1 and CH 2 intercept each other.
  • the two fields of observation CH 1 and CH 2 are schematically illustrated in projection in a horizontal plane H (FIG. 1) and in a vertical plane V (FIG. 2).
  • the two bars b ' 1 and b 1 of photo-detectors associated with the observation field CH 1 are located at point B.
  • the bar b' 1 is associated with the face f ' 1 of the dihedral, while the bar b 1 is associated with the face f 1 of the dihedral, these two faces f ' 1 and f 1 forming angles ⁇ ' 1 and ⁇ 1 with respect to the horizontal axis AX (FIG. 1).
  • the two arrays b ' 2 and b 2 of photo-detectors associated with the observation field CH 2 are located at point A.
  • the coordinate along a vertical axis of each of the four points where the threat M crosses the fields of observation CH 1 and CH 2 is deduced from the photo-detectors which will have reacted and which are representative of the site of the threat M, knowing that the resolution of the site measurement will be equal to ⁇ / N or N represents the number of photo-detectors contained in a strip.
  • the trajectory and speed in the threat space M are then known, and we can then trigger a responds from the vehicle.
  • This response consisting of a system for projecting offensive elements for example, is triggered after calculating an interception point and the right time for this trigger.
  • One means of identification is to be able to measure the threat M surface temperature which in the case of a arrow projectile, can reach several hundred degrees.
  • the two pairs of photo-detectors will be chosen to work in two length bands of different waves, which will allow us to go back to the true temperature of threat M, these two bands being of 3 to 5 ⁇ m for one and 3 to 12 ⁇ m for the other, for example.
  • a compromise is chosen in the choice of these wavelength bands to be able to identify several types of threats.
  • each dihedral face can be chosen to be as thin as possible to improve the detection accuracy.
  • this finesse is not not essential because it is possible to base only on the beginning of detection by the faces of the dihedral to carry out the calculations described above. Concretely, the only condition to respect is that the energy emitted by the threat is greater than the energy perceived by the photo-detectors.
  • a field of observation CH 3 is added, starting from the roof of the vehicle for example, which is directed towards the ground and which intercepts the two fields of observation CH 1 and CH 2 .
  • the number of unknowns increases (M0 and M'0) but based as before on the principle that the speed of the ammunition is assumed to be constant, the system enriched with a sufficiently large number of equation so that the trajectory is perfectly identifiable in space (and no longer only in a plane projection).
  • the measurement of the site of the crossing points of the observation fields CH 1 and CH 2 by the threat M becomes unnecessary.
  • the number of photo-detectors per strip is no longer dictated by the desired resolution in a vertical plane but by obtaining a sufficient signal / noise ratio in the field observed.
  • FIGS. 5 and 6 three fields of observation CH 1 , CH 2 and CH 3 having conical shapes (which surround the vehicle) are used as shown in FIG. 5 and which, in a horizontal plane H, forming concentric circles C ' 3 -C 3 , C' 2 -C 2 and C ' 1 -C 1 which intercept each other.
  • At least the speed and the trajectory of the threat M are determined by detecting the order in which the fields CH 1 , CH 2 and CH 3 are crossed, and the times measured between each crossing of the field.
  • the resulting equations are non-linear and therefore less simple to solve than the previous embodiments.
  • the photo detectors used are of the photovoltaic type for example, which deliver analog signals.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Optical Radar Systems And Details Thereof (AREA)
EP20000402990 1999-10-29 2000-10-27 Verfahren und System zur Entdeckung einer nach einem festen oder beweglichen Gegenstand geworfenen Bedrohung Expired - Lifetime EP1096219B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9913633 1999-10-29
FR9913633A FR2800452B1 (fr) 1999-10-29 1999-10-29 Procede et systeme pour detecter une menace tiree sur un objet fixe ou mobile

Publications (2)

Publication Number Publication Date
EP1096219A1 true EP1096219A1 (de) 2001-05-02
EP1096219B1 EP1096219B1 (de) 2004-08-04

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP20000402990 Expired - Lifetime EP1096219B1 (de) 1999-10-29 2000-10-27 Verfahren und System zur Entdeckung einer nach einem festen oder beweglichen Gegenstand geworfenen Bedrohung

Country Status (3)

Country Link
EP (1) EP1096219B1 (de)
DE (1) DE60012654T2 (de)
FR (1) FR2800452B1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004003455A1 (de) * 2002-06-28 2004-01-08 Diehl Munitionssysteme Gmbh & Co. Kg Objekt-selbstschutzvorrichtung
US7335116B2 (en) 2003-10-15 2008-02-26 Dimitri Petrov Method and apparatus for locating the trajectory of an object in motion
US7650256B2 (en) 2004-10-15 2010-01-19 Dimitri Petrov Consultants Inc. Method and apparatus for locating the trajectory of an object in motion
GB2478059A (en) * 2010-02-18 2011-08-24 Norman Matheson Lindsay Determining motion of a projectile such as a golf ball

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007007404A1 (de) 2007-02-12 2008-08-14 Krauss-Maffei Wegmann Gmbh & Co. Kg Verfahren und Vorrichtung zur Fernauslösung eines Geschosses
DE102007007403A1 (de) 2007-02-12 2008-08-21 Krauss-Maffei Wegmann Gmbh & Co. Kg Verfahren und Vorrichtung zum Schutz gegen fliegende Angriffsmunitionskörper
DE102008023520C5 (de) * 2008-05-15 2016-12-29 Airbus Defence and Space GmbH Verfahren zur Klassifikation von RAM-Geschossen

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2570835A1 (fr) * 1984-09-21 1986-03-28 Matra Dispositif de detection optique du passage d'un mobile et de localisation du point de passage
DE4444635A1 (de) * 1994-12-15 1996-06-20 Daimler Benz Aerospace Ag Einrichtung zur Selbstverteidigung gegen Flugkörper

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2570835A1 (fr) * 1984-09-21 1986-03-28 Matra Dispositif de detection optique du passage d'un mobile et de localisation du point de passage
DE4444635A1 (de) * 1994-12-15 1996-06-20 Daimler Benz Aerospace Ag Einrichtung zur Selbstverteidigung gegen Flugkörper

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004003455A1 (de) * 2002-06-28 2004-01-08 Diehl Munitionssysteme Gmbh & Co. Kg Objekt-selbstschutzvorrichtung
US7236122B2 (en) 2002-06-28 2007-06-26 Diehl Munitionssysteme Gmbh & Co. Kg Self-protecting device for an object
US7335116B2 (en) 2003-10-15 2008-02-26 Dimitri Petrov Method and apparatus for locating the trajectory of an object in motion
US7650256B2 (en) 2004-10-15 2010-01-19 Dimitri Petrov Consultants Inc. Method and apparatus for locating the trajectory of an object in motion
GB2478059A (en) * 2010-02-18 2011-08-24 Norman Matheson Lindsay Determining motion of a projectile such as a golf ball
WO2011101459A1 (en) * 2010-02-18 2011-08-25 Norman Lindsay Electro-optical sensor method and system for determining the motion of a projectile

Also Published As

Publication number Publication date
FR2800452B1 (fr) 2005-06-24
DE60012654T2 (de) 2005-01-05
EP1096219B1 (de) 2004-08-04
FR2800452A1 (fr) 2001-05-04
DE60012654D1 (de) 2004-09-09

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