EP2602239A2 - 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
EP2602239A2
EP2602239A2 EP12007978.5A EP12007978A EP2602239A2 EP 2602239 A2 EP2602239 A2 EP 2602239A2 EP 12007978 A EP12007978 A EP 12007978A EP 2602239 A2 EP2602239 A2 EP 2602239A2
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EP
European Patent Office
Prior art keywords
active mass
active
component
mass component
combustion
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
EP12007978.5A
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German (de)
English (en)
Other versions
EP2602239A3 (fr
EP2602239B1 (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
Original Assignee
Diehl BGT Defence GmbH and Co KG
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Publication of EP2602239A2 publication Critical patent/EP2602239A2/fr
Publication of EP2602239A3 publication Critical patent/EP2602239A3/fr
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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 an essentially spectrally radiating pyrotechnic infrared light target with spatial effect during combustion.
  • An essentially spectrally radiating pyrotechnic infrared light target emits significantly more radiation at a wavelength of 3.5 to 4.6 ⁇ m during burnup; H. a radiation in the so-called B-band, as radiation in the range of a wavelength of 1.8 to 2.6 microns, the so-called A-band.
  • the A-band and B-band are the wavelengths detected by conventional seekers.
  • a spatial effect has hitherto been achieved by the use of red phosphorus or pyrophoric systems in active compositions. Such active compounds are problematic in terms of safety.
  • the space effect generated by these active masses is stationary.
  • the stationary space effect does not make it possible to simulate a flying jet aircraft to an image-resolving seeker head if a decoy target containing this active mass moves as fast as a jet during combustion of the active mass in the air.
  • a B-band sensitive IR sensor only as a point-like radiation source and not like a jet engine of an aircraft with exhaust plume as a point-shaped radiation source with a long tail.
  • a relatively high proportion of the specific power of the radiation emitted during the combustion of such active compositions is in the wavelength range from 1.8 to 2.6 ⁇ m. The radiation thus has a relatively high proportion of black body radiation.
  • the tablet has a compactly pressed, substantially bubble-free area of separate pieces of infrared radiation-emitting pyrotechnic composition, which may be embedded in a base material, wherein the base material, if present, or the separated pieces, if no base material is present from a Gas-releasing infrared light emitting pyrotechnic composition / consist.
  • the container is designed in such a way that it tears under a given internal pressure resulting from the combustion of the pyrotechnic composition and releases the individual pieces shortly after essentially all parts have been ignited.
  • the effective masses known from this publication emit predominantly radiation in the A band and not in the B band during the burnup.
  • the explosive release of the pieces upon ignition of the pyrotechnic composition as the tablet bursts forms a cloud of the burning pyrotechnic composition which is rapidly decelerated and burns with high infrared intensity for a short time.
  • Such a flare torch is incapable of simulating a new-generation seeker head of a fast-flying aircraft because of the rapid deceleration in the air, which does not have motion similar to the missile and therefore does not resemble an exhaust jet.
  • the object of the present invention is to provide an active mass which radiates strongly spectrally when burning with high radiation power, d. H. emitted a relatively high proportion of radiation in the B band and a relatively low proportion of radiation in the A band.
  • the active mass during combustion and at the same time rapid movement in the air should have a strong spatial effect, which emulates an exhaust jet of a fast-moving jet aircraft.
  • a use of such an active mass is to be specified.
  • an active mass for an essentially spectrally radiating pyrotechnic infrared light target with spatial effect during combustion.
  • This active mass comprises a first spectrally radiating effective mass component during the burnup and a second spectrally radiating component during burnup Effective mass components.
  • the first and the second active material components each comprise at least one fuel and an 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 effective mass component are selected such 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 in a separate burning of the first and the second active mass component in the air, the ratio between the specific power of the emitted radiation in the wavelength range of 3.5 to 4.6 microns to the specific power of the emitted radiation in the wavelength range of 1.8 to 2.6 microns each at least 5: 1.
  • the first active component and the second active component can be composed of the same or different components.
  • the first active mass component and the second active mass component may be any known active masses which fulfill the stated criteria.
  • conventional manufacturing processes can be easily adapted to the production of the active material according to the invention.
  • Another significant advantage of the active material according to the invention is that this active substance containing decoys can be constructed as previous decoys. There are no significant changes in the production required. Essentially, the same tools and tablet geometries can be used as with previous active compositions.
  • the effective burn rate of the decoy target can be adjusted by the choice of the first and second active mass component so that it corresponds to the burning rate of previously used active masses. The effort in the conversion of production to the production of the active compound containing decay targets according to the invention is therefore low.
  • the effective mass according to the invention makes it possible to use known active compositions with a high ratio between the specific power of the emitted radiation in the B band and 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 are normally when burning a spotlight.
  • spectral ratio the ratio between the specific power of the emitted radiation in the B band and the specific power of the emitted radiation in the A band
  • it allows the active material according to the invention, a in with room effect burn-off known active compounds previously not achievable spectral ratio of about 10: 1 provide.
  • the first active component burns off, igniting the particles formed from the second active component. Since the first active component burns faster than the second active component, the burning particles are released before they are completely burned off. If the active mass moves at high speed during combustion, the released burning particles are slowed down faster than the entire active mass and it creates a tail. Since the performance of a flotation effective mass decreases generally with increasing speed, the braking of the released burning particles by the air resistance causes an increase in the power produced in the tail. At the same time, a higher spectral ratio is achieved by slowing down the burning particles in the air. A higher power can also be achieved by selecting the second active mass component such that the radiation emitted when it burns out has significantly more specific power than the radiation emitted during the burnup of the first active mass component.
  • the ratio of the burning rate of the first active mass component to the burning rate of the second active mass component makes it possible to set the size of the room effect and the intensity distribution within the space occupied by the burning particles.
  • the effective mass can be adjusted so that the radiation emitted during combustion corresponds to the radiation of a real jet engine or at least comes very close to this radiation.
  • the particles appear the more discrete the more they burn up. This reduces the density of the tail. It should therefore be found for the individual case, for example, depending on the speed of the decoy and the nozzle engine to be mimicked by the choice of the size of the particles, a compromise between the strength and density of the tail.
  • 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 may have a particle size in the range of 0.5 to 5 mm, in particular 0.5 to 3 mm.
  • the first and the second active mass component are selected so that in a separate burning each of the first and / or the second active component in the 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, in each case at least 8: 1, in particular at least 11: 1, in particular at least 14: 1.
  • this is embedded in any container or at most embedded in a container that builds up the container destructive overpressure in their combustion in the container.
  • an explosive release of the particles can be avoided. This is particularly advantageous when the active mass moves during combustion and while a space effect is to be generated in the form of a tail. In an explosive release of the particles of a moving active mass only a relatively stationary space effect would arise.
  • a use of the active material according to the invention for the production of a moving during combustion at a speed of at least 150 m / s pyrotechnic infrared light target is provided according to the invention. It may be a pyrotechnic infrared light target, which moves with at least 200 m / s, in particular at least 250 m / s.
  • Fig. 1 a shows the effective 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.
  • the active mass 10 After ignition of the active mass 10 initially arises only in Fig. 1 b represented by the erosion of the first active mass component 12 resulting first flame 16.
  • the particles of the second active mass component 14 are released. At the same time they 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 off more slowly than the first active mass component 12, the particles of the second active mass component 14 continue to burn in the air after their release. This is in Fig. 1 c in the case of an active mass 10 moving away from the first flame 16.
  • Type weight first active 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 component Burning rate approx.
  • the first active component has a theoretical average density of 1678 kg / m 3 and the second active component has a theoretical average density of 1633 kg / m 3 on.
  • the effective 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 component have a particle size of 0.5 to 3.0 mm.
  • the theoretical average density of the first active component is 1678 kg / m 3 .
  • the second active component consists here of the commercially available propellant powder Vihtavuori 20N29 the company Eurenco Vihtavuori Oy, Ruutitehtaantie 80, 41330 Vihtavuori, Finland.
  • the effective 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 component have a particle size in the range of 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)
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 true EP2602239A2 (fr) 2013-06-12
EP2602239A3 EP2602239A3 (fr) 2017-07-19
EP2602239B1 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)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2824413A1 (fr) * 2013-06-18 2015-01-14 Diehl BGT Defence GmbH & Co.KG Corps actif de leurre doté d'une masse active à cible pyrotechnique

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4244682A1 (de) 1991-10-01 1995-10-05 Secr Defence Hochintensive pyrotechnische Infrarot-Täuschungsfackel

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4244682A1 (de) 1991-10-01 1995-10-05 Secr Defence Hochintensive pyrotechnische Infrarot-Täuschungsfackel

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2824413A1 (fr) * 2013-06-18 2015-01-14 Diehl BGT Defence GmbH & Co.KG Corps actif de leurre doté d'une masse active à cible pyrotechnique
EP2824413B1 (fr) 2013-06-18 2017-04-05 Diehl BGT Defence GmbH & Co.KG Corps actif de leurre doté d'une masse active à cible pyrotechnique
AU2014203268B2 (en) * 2013-06-18 2018-01-18 Diehl Defence Gmbh & Co. Kg Active decoy body with an active pyrotechnic composition

Also Published As

Publication number Publication date
IL223417B (en) 2018-12-31
EP2602239A3 (fr) 2017-07-19
DE102011120454A1 (de) 2013-06-13
EP2602239B1 (fr) 2020-01-01
ZA201209172B (en) 2013-09-25

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