EP2602239B1 - Masse active pour une cible à rayonnement infrarouge pour l'essentiel à émission spectrale lors d'une combustion avec effet spatial - Google Patents

Masse active pour une cible à rayonnement infrarouge pour l'essentiel à émission spectrale lors d'une combustion avec effet spatial Download PDF

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Publication number
EP2602239B1
EP2602239B1 EP12007978.5A EP12007978A EP2602239B1 EP 2602239 B1 EP2602239 B1 EP 2602239B1 EP 12007978 A EP12007978 A EP 12007978A EP 2602239 B1 EP2602239 B1 EP 2602239B1
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EP
European Patent Office
Prior art keywords
active mass
burnup
active
component
mass component
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.)
Active
Application number
EP12007978.5A
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German (de)
English (en)
Other versions
EP2602239A2 (fr
EP2602239A3 (fr
Inventor
Arno Hahma
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.)
Diehl Defence GmbH and Co KG
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Diehl Defence GmbH and Co KG
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Publication date
Application filed by Diehl Defence GmbH and Co KG filed Critical Diehl Defence GmbH and Co KG
Publication of EP2602239A2 publication Critical patent/EP2602239A2/fr
Publication of EP2602239A3 publication Critical patent/EP2602239A3/fr
Application granted granted Critical
Publication of EP2602239B1 publication Critical patent/EP2602239B1/fr
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C06—EXPLOSIVES; MATCHES
    • C06C—DETONATING OR PRIMING DEVICES; FUSES; CHEMICAL LIGHTERS; PYROPHORIC COMPOSITIONS
    • C06C15/00—Pyrophoric compositions; Flints
    • C—CHEMISTRY; METALLURGY
    • C06—EXPLOSIVES; MATCHES
    • C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
    • C06B45/00—Compositions or products which are defined by structure or arrangement of component of product
    • C06B45/04—Compositions or products which are defined by structure or arrangement of component of product comprising solid particles dispersed in solid solution or matrix not used for explosives where the matrix consists essentially of nitrated carbohydrates or a low molecular organic explosive
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41J—TARGETS; TARGET RANGES; BULLET CATCHERS
    • F41J2/00—Reflecting targets, e.g. radar-reflector targets; Active targets transmitting electromagnetic or acoustic waves
    • F41J2/02—Active targets transmitting infrared radiation

Definitions

  • the invention relates to an active mass for a pyrotechnic infrared glow target with a spatial effect that burns essentially spectrally when burned.
  • a pyrotechnic infrared glow target which is essentially spectrally radiating when burned off, emits significantly more radiation of a wavelength of 3.5 to 4.6 ⁇ m, ie. H. radiation in the so-called B-band, as radiation in the range from 1.8 to 2.6 ⁇ m, the so-called A-band.
  • the A-band and the B-band are the wavelengths that are detected by conventional search heads.
  • a pyrotechnic illusion torch to be fired from an aircraft to deflect those flying towards the aircraft Shot from the gas outlet with at least one table, which is contained in an airtight, tearable container, known.
  • the tablet has a compactly pressed, essentially bubble-free area of separate pieces of a pyrotechnic composition that emits infrared radiation, which may be embedded in a base material, the base material, if present, or the separated pieces, if no base material is present, from one Gas-releasing infrared light-emitting pyrotechnic composition exists.
  • the container is designed such that it tears under a predetermined internal pressure resulting from the combustion of the pyrotechnic composition and releases the individual pieces shortly after essentially all parts have been ignited.
  • the active masses known from this publication emit predominantly radiation in the A band and not in the B band when they burn up.
  • a cloud is formed from the burning pyrotechnic composition, which is slowed down quickly and burns for a short time with high infrared intensity.
  • Such a deceptive torch is unable to simulate a new-generation seeker head for a fast-flying aircraft because the infrared source, due to the rapid braking in the air, has no movement similar to the missile and therefore does not resemble an exhaust gas jet.
  • EP2151664 A2 discloses an apparent target, wherein at least two active masses are accommodated in a cartridge, wherein a first active mass generates a spectrum similar to a blackbody when burned up, and wherein a second active mass burns a spectrum which is essentially H 2 O and CO 2 different from the first active mass generated, and wherein an ejection device is provided for the temporally staggered ejection of the first and the second active mass from the cartridge, the ejection device being designed such that the first active mass and subsequently the second active mass are subsequently ejected from the cartridge, and wherein the second active mass is provided with a braking means for braking the falling speed.
  • the object of the present invention is to provide an active mass which radiates strongly spectrally when burned with high radiation power, i. H. emits a relatively high proportion of radiation in the B band and a comparatively low proportion of radiation in the A band.
  • the active mass during combustion and with simultaneous rapid movement in the air should have a strong spatial effect which simulates an exhaust gas jet from a fast-moving jet aircraft.
  • the use of such an active mass is to be specified.
  • an active mass for a pyrotechnic infrared glow target with a spatial effect that burns essentially spectrally during the combustion.
  • This Active mass comprises a first active mass component which radiates spectrally when burned and a second spectrally radiant when burned Effective mass components.
  • the first and the second active mass component each comprise at least one fuel and one oxidizing agent and optionally a binder.
  • the active mass is inhomogeneous in that the first active mass component forms a matrix in which particles formed from the second active mass component are embedded.
  • the first and the second active mass components are selected so that the ratio of the burning rate of the first active mass component to the burning rate of the second active mass component is at least 2: 1 and that when the first and second active mass components burn off separately in air, the ratio between the specific power of the emitted radiation in the wavelength range from 3.5 to 4.6 ⁇ m to the specific power of the emitted radiation in the wavelength range from 1.8 to 2.6 ⁇ m is in each case at least 5: 1.
  • the first active mass component and the second active mass component can be composed of the same or different components.
  • the first active mass component and the second active mass component can be any known active mass which meet the criteria mentioned.
  • conventional manufacturing processes can be easily adapted to the production of the active compound according to the invention.
  • Another essential advantage of the active mass according to the invention is that the apparent targets containing these active compositions can be constructed like previous apparent targets. No major changes in manufacturing are required. Essentially the same tools and tablet geometries can be used as with previous active materials.
  • the effective burn-up rate of the apparent target can be set by choosing the first and second active mass components so that it corresponds to the burn-up rate of active masses used previously. The effort involved in converting production to the manufacture of apparent targets containing the active compound according to the invention is therefore low.
  • the active mass according to the invention makes it possible to use known active masses with a high ratio between the specific power of the emitted radiation in the B band to the specific power of the emitted radiation in the A band (spectral ratio) and to produce a spatial effect with these active masses, although these active masses normally represent a spotlight when burning.
  • the active mass according to the invention allows one with a spatial effect Burning known active masses to provide previously unattainable spectral ratio of over 10: 1.
  • the first active mass component burns off and ignites the particles formed from the second active mass component. Since the first active mass component burns faster than the second active mass component, the burning particles are released before they have completely burned off. If the active mass moves at high speed during combustion, the released burning particles are braked faster than the entire active mass and a tail is created. Since the output of an active mass that burns in flight generally decreases with increasing speed, the braking of the released burning particles by air resistance causes an increase in the output in the tail produced. At the same time, a higher spectral ratio is achieved by braking the burning particles in the air. A higher output can also be achieved in that the second active mass component is selected such that the radiation emitted when it burns off has significantly more specific power than the radiation emitted when the first active mass component burned off.
  • the size of the spatial effect and the intensity distribution within the space occupied by the burning particles can be set by the ratio of the burning rate of the first active mass component to the burning rate of the second active mass component.
  • the active mass can be set such that the radiation emitted during movement when it is burned up corresponds to the radiation of a real jet engine or at least comes very close to this radiation.
  • the ratio of the burning rate of the first active mass component to the burning rate of the second active mass component is at least 4: 1, in particular at least 7: 1, in particular at least 10: 1.
  • the particles can have a grain size in the range from 0.5 to 5 mm, in particular 0.5 to 3 mm.
  • the first and the second active mass components are selected such that when the first and / or the second active mass components are burned off separately in air, the ratio between the specific power of the emitted radiation in the wavelength range from 3.5 to 4.6 ⁇ m for the specific power of the emitted radiation in the wavelength range from 1.8 to 2.6 ⁇ m is in each case at least 8: 1, in particular at least 11: 1, in particular at least 14: 1.
  • the active compound according to the invention is not embedded in a container or at most embedded in a container in such a way that no excess pressure which destroys the container builds up in the container when it burns. This can prevent an explosive release of the particles. This is particularly advantageous if the active mass moves when it burns up and a spatial effect in the form of a tail is to be created. An explosive release of the particles of a moving active mass would only result in a relatively stationary spatial effect.
  • the use of the active compound according to the invention is provided according to the invention for producing a pyrotechnic infrared glow target that moves at a speed of at least 150 m / s. It can be a pyrotechnic infrared target, which moves at least 200 m / s, in particular at least 250 m / s.
  • 1a to c show schematic representations of the active mass according to the invention before and at the beginning of the erosion and in the case of advanced erosion.
  • Fig. 1a shows the active mass 10 according to the invention, which consists of a matrix formed by the first active mass component 12 and particles of the second active mass component 14 embedded therein.
  • first flame 16 resulting from the erosion of the first active mass component 12
  • the first active mass component 12 releases the particles of the second active mass component 14.
  • these are ignited by the first flame 16.
  • the second flame 18 is formed on the particles of the second active mass component 14. Since the particles of the second active mass component 14 burn more slowly than the first active mass component 12, the particles of the second active mass component 14 continue to burn after their release in the air. This is in Fig. 1c for the case of an active mass 10 moving away from the first flame 16.
  • Tablets weighing 10 g each were produced from all of the compositions given below. When they burned off, a spatial effect could be determined in each case by burning particles of the second active mass component flying away.
  • Type weight first active mass component Burning rate approx. 3 mm / s ammonium perchlorate ⁇ 30 ⁇ m 77.80
  • HTPB Sartomer R45HT-M M 2800 10.32 IPDI 0.78 hexamethylenetetramine 11.0 iron acetonyl 0.10 second active mass component: Burn rate approx.
  • the first active mass component has a theoretical average density of 1678 kg / m 3 and the second active mass component has a theoretical average density of 1633 kg / m 3 .
  • the active mass consists of 70% by weight of the first active mass component forming a matrix and 30% by weight of the second active mass component present in the form of particles embedded therein.
  • the particles of the second active mass component have a grain size of 0.5 to 3.0 mm.
  • the theoretical average density of the first active mass component is 1678 kg / m 3 .
  • the second active mass component here consists of the propellant powder Vihtavuori 20N29 from Eurenco Vihtavuori Oy, Ruutitehtaantie 80, 41330 Vihtavuori, Finland, which can be purchased.
  • the active mass consists of 60% by weight of the first active mass component forming the matrix and 40% by weight of particles of the second active mass component.
  • the particles of the second active mass component have a grain size in the range from 2 to 3 mm.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Molecular Biology (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Electromagnetism (AREA)
  • Health & Medical Sciences (AREA)
  • Remote Sensing (AREA)
  • General Engineering & Computer Science (AREA)
  • Metallurgy (AREA)
  • Air Bags (AREA)
  • Radiation-Therapy Devices (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)

Claims (8)

  1. Matière active destinée à une cible de lumière infrarouge pyrotechnique à effet spatial rayonnant de manière sensiblement spectrale pendant la combustion, la matière active comprenant un premier composant de matière active rayonnant spectralement pendant la combustion et un deuxième composant de matière active rayonnant spectralement pendant la combustion,
    les premier et deuxième composants de matière active comprennent chacun au moins un combustible et un oxydant,
    la matière active étant inhomogène en ce que le premier composant de matière active forme une matrice dans laquelle sont incorporées des particules formées à partir du deuxième composant de matière active,
    les premier et deuxième composants de matière active étant choisis de telle sorte que le rapport de la vitesse de combustion du premier composant de matière active sur la vitesse de combustion du deuxième composant de matière active soit d'au moins 2:1 et que, dans le cas d'une combustion séparée des premier et deuxième composants de matière active dans l'air, le rapport de la puissance spécifique du rayonnement émis dans la gamme de longueurs d'onde allant de 3,5 à 4,6 µm à la puissance spécifique du rayonnement émis dans la gamme de longueurs d'onde allant de 1,8 et 2,6 µm soit d'au moins 5:1.
  2. Matière active selon la revendication 1,
    le rapport de la vitesse de combustion du premier composant de matière active à la vitesse de combustion du deuxième composant de matière active étant d'au moins 4:1, en particulier d'au moins 7:1, en particulier d'au moins 10:1.
  3. Matière active selon l'une des revendications précédentes,
    les particules ayant une granulométrie dans la gamme allant de 0,5 mm à 5 mm, en particulier de 0,5 mm à 3 mm.
  4. Matière active selon l'une des revendications précédentes,
    le premier et le deuxième composant de matière active étant choisis de sorte que, dans une combustion séparée du premier et/ou du deuxième composant de matière active dans l'air, le rapport de la puissance spécifique du rayonnement émis dans la gamme de longueurs d'onde allant de 3,5 à 4,6 à la puissance spécifique du rayonnement émis dans la gamme de longueurs d'onde allant de 1,8 à 2,6, soit à chaque fois d'au moins 8:1, en particulier d'au moins 11:1, en particulier d'au moins 14:1.
  5. Matière active selon l'une des revendications précédentes,
    la matière active n'étant incorporée dans aucun récipient ou n'étant incorporée dans un récipient que si, lors de leur combustion, aucune surpression destructive pour le récipient ne s'accumule dans le récipient.
  6. Matière active selon l'une des revendications précédentes,
    le premier et/ou le deuxième composant de matière active comprennent chacun un liant.
  7. Utilisation de la matière active selon l'une des revendications précédentes dans la fabrication d'une cible de lumière infrarouge pyrotechnique se déplaçant lors de la combustion à une vitesse d'au moins 150 m/s.
  8. Utilisation selon la revendication 7,
    la cible de lumière infrarouge se déplaçant à au moins 200 m/s, en particulier à au moins 250 m/s.
EP12007978.5A 2011-12-07 2012-11-28 Masse active pour une cible à rayonnement infrarouge pour l'essentiel à émission spectrale lors d'une combustion avec effet spatial Active EP2602239B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102011120454A DE102011120454A1 (de) 2011-12-07 2011-12-07 Wirkmasse für ein beim Abbrand im Wesentlichen spektral strahlendes Infrarotscheinziel mit Raumwirkung

Publications (3)

Publication Number Publication Date
EP2602239A2 EP2602239A2 (fr) 2013-06-12
EP2602239A3 EP2602239A3 (fr) 2017-07-19
EP2602239B1 true EP2602239B1 (fr) 2020-01-01

Family

ID=47294638

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12007978.5A Active EP2602239B1 (fr) 2011-12-07 2012-11-28 Masse active pour une cible à rayonnement infrarouge pour l'essentiel à émission spectrale lors d'une combustion avec effet spatial

Country Status (4)

Country Link
EP (1) EP2602239B1 (fr)
DE (1) DE102011120454A1 (fr)
IL (1) IL223417B (fr)
ZA (1) ZA201209172B (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013010266A1 (de) * 2013-06-18 2014-12-18 Diehl Bgt Defence Gmbh & Co. Kg Scheinzielwirkkörper mit einer pyrotechnischen Wirkmasse

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9120803D0 (en) 1991-10-01 1995-03-08 Secr Defence Pyrotechnic decoy flare
DE4327976C1 (de) * 1993-08-19 1995-01-05 Buck Chem Tech Werke Flaremasse zur Scheinzielerzeugung
DE19617701C2 (de) * 1996-05-03 2000-01-13 Buck Werke Gmbh & Co I K Verfahren zum Bereitstellen eines Scheinziels
US6427599B1 (en) * 1997-08-29 2002-08-06 Bae Systems Integrated Defense Solutions Inc. Pyrotechnic compositions and uses therefore
DE102007011662A1 (de) * 2007-03-09 2008-09-11 Diehl Bgt Defence Gmbh & Co. Kg Pyrotechnische Wirkmasse
DE102008036408A1 (de) * 2008-08-06 2010-02-11 Diehl Bgt Defence Gmbh & Co. Kg Hybridscheinziel

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
EP2602239A2 (fr) 2013-06-12
EP2602239A3 (fr) 2017-07-19
DE102011120454A1 (de) 2013-06-13
IL223417B (en) 2018-12-31
ZA201209172B (en) 2013-09-25

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