EP0936436B1 - Device for emission of infrared radiation - Google Patents

Device for emission of infrared radiation Download PDF

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Publication number
EP0936436B1
EP0936436B1 EP19990400237 EP99400237A EP0936436B1 EP 0936436 B1 EP0936436 B1 EP 0936436B1 EP 19990400237 EP19990400237 EP 19990400237 EP 99400237 A EP99400237 A EP 99400237A EP 0936436 B1 EP0936436 B1 EP 0936436B1
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EP
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Prior art keywords
combustion
metal wire
ppm
des
oxidizer
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German (de)
French (fr)
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EP0936436A1 (en
Inventor
Christian Romand
Jean-Francois Barnier
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Aerospatiale Matra
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Aerospatiale Matra
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    • 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
    • F42B12/38—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 of tracer type
    • F42B12/382—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 of tracer type emitting an electromagnetic radiation, e.g. laser beam or infrared emission
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K5/00—Light sources using charges of combustible material, e.g. illuminating flash devices

Definitions

  • the present invention relates to a radiation emission device infrared.
  • such a device is more particularly suitable for locating the position of a flying object, in particular a missile.
  • the present invention relates to a radiation emission device infrared which overcomes the aforementioned drawbacks.
  • said device does not emit particles dangerous.
  • the radiation emitted can be filtered and their modulated intensity, as will be seen below.
  • the combustion does not cause metal oxide deposition on the support of said device, for example a window, and therefore should not be carried out in a vacuum and can for example be carried out directly in the open air.
  • said metal wire is made of one of the metals following: tantalum, chromium and zirconium.
  • said metal wire is arranged under coil shape, which allows in particular to simplify assembly and the arrangement of said wire.
  • the device according to the invention comprises at least two ignition means, each of said means ignition causing the combustion of a separate metal wire and said combustions are generated at different times, which allows in particular to adapt the different emissions of infrared radiation possible during the flight phases of a flying object wearer of said device.
  • Figure 1 schematically shows a first embodiment of a device according to the invention.
  • Figure 2 is a schematic top view of the device of the figure 1.
  • Figure 3 schematically illustrates a coil fitted with metallic wires of different diameters.
  • Figure 4 schematically shows a second embodiment of a device according to the invention.
  • the device according to the invention and represented in two modes 1A and 1B different in Figures 1 and 4 is intended to emit IR infrared radiation.
  • Said device 1A, 1B can in particular be mounted on a machine flying, for example a missile, not shown, to create a track the along the flight path of said flying object.
  • said metal wire F1, F2 can in particular be made of chromium, zirconium or tantalum, said metals having to present sufficient purity qualities to allow processing of the invention.
  • the present invention provides different solutions for modify and adjust the intensity of the IR infrared radiation emitted.
  • air could also be used as an oxidizer.
  • This air can in particular be supplied via a non-venturi represented.
  • a second solution to modify the intensity of radiation infrared IR is to change the pitch of the coils 3.
  • the device 1A may be wise to vary intensity as a function of the flight phase.
  • it is generally interesting to have a low intensity at the start of the flight and an intensity stronger when approaching a target to be reached.
  • Device 1A can also be used for monitoring and detection target gear and drones. In this case, the intensity must be changed to depending on flight conditions.
  • combustion is carried out in the direction of arrow F, for the example shown in Figure 3, that is to say in the direction of decreasing wire diameters.
  • the device 1B comprises several supports 2, each of these being provided with a set E of coils 3 and being connected by a conduit C1, C2 oxygen supply to the bottle 7.
  • the arrangement of the different supports 2 is variable and can in particular be chosen according to the structure or mission of the machine steering wheel not shown intended to carry said device 1B. Depending oxygen pressure and the spacing of the turns, we can favor a concentric or radial propagation front, or a combination of these two modes of propagation.
  • each of said conduits C1 and C2 is provided with a valve 10 making it possible to cut off the oxygen supply, in particular in the case of delayed combustions for the different sets E of coils 3.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Electromagnetism (AREA)
  • Optics & Photonics (AREA)
  • Toxicology (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Liquid Carbonaceous Fuels (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)

Description

La présente invention concerne un dispositif d'émission de rayonnements infrarouges.The present invention relates to a radiation emission device infrared.

Bien que non exclusivement, un tel dispositif est plus particulièrement approprié au repérage de la position d'un engin volant, notamment un missile.Although not exclusively, such a device is more particularly suitable for locating the position of a flying object, in particular a missile.

On sait que, à partir d'un tel repérage d'un missile, notamment un missile antichar, en vol, par exemple à partir d'un poste de tir, on peut déduire des informations permettant de guider ledit missile.We know that, from such a location of a missile, in particular a anti-tank missile, in flight, for example from a firing point, we can deduce information making it possible to guide said missile.

On connaít à cet effet différents types d'émetteurs infrarouges ou de traceurs (c'est-à-dire des dispositifs qui créent une trace le long de la trajectoire du missile), en particulier :

  • des traceurs pyrotechniques dits "à flammes" qui projettent des particules incandescentes. Toutefois, ces derniers présentent de nombreux inconvénients. En particulier, lesdites projections de particules sont très dangereuses, notamment pour les fils de commande. De plus, ces traceurs ne permettent pas un filtrage des radiations émises. On connaít de tels traceurs à flammes, par exemple des documents FR-2 417 078 et FR-2 574 535 ;
  • des traceurs à lampes, notamment à lampes dites "à éclats". Ces traceurs permettent le filtrage des radiations émises et facilitent l'installation de dispositifs antibrouillage. Toutefois, l'intensité des radiations émises est généralement trop faible pour des distances importantes, par exemple supérieures à quatre kilomètres ; et
  • des traceurs pyrotechniques, sans émission de gaz. Ces traceurs permettent un filtrage des radiations émises. Toutefois, l'intensité des radiations est difficilement modulable et elle est généralement maximale bien avant la fin du vol du missile.
We know for this purpose different types of infrared emitters or tracers (that is to say, devices which create a trace along the trajectory of the missile), in particular:
  • so-called "flame" pyrotechnic tracers which project incandescent particles. However, these have many drawbacks. In particular, said particle projections are very dangerous, in particular for the control wires. In addition, these tracers do not allow filtering of the radiation emitted. We know such flame tracers, for example documents FR-2 417 078 and FR-2 574 535;
  • lamp tracers, in particular with so-called "flashing" lamps. These tracers allow the filtering of the emitted radiations and facilitate the installation of anti-jamming devices. However, the intensity of the radiation emitted is generally too low for long distances, for example greater than four kilometers; and
  • pyrotechnic tracers, without emission of gas. These tracers allow filtering of the radiation emitted. However, the intensity of the radiation is difficult to adjust and it is generally maximum well before the end of the missile flight.

La présente invention concerne un dispositif d'émission de rayonnements infrarouges qui permet de remédier aux inconvénients précités.The present invention relates to a radiation emission device infrared which overcomes the aforementioned drawbacks.

A cet effet, selon l'invention, ledit dispositif d'émission de rayonnements infrarouges est remarquable en ce qu'il comporte :

  • au moins un fil métallique, réfractaire et combustible, qui émet des rayonnements infrarouges lors de sa combustion ; et
  • au moins un moyen d'allumage pour déclencher ladite combustion.
To this end, according to the invention, said device for emitting infrared radiation is remarkable in that it comprises:
  • at least one metallic wire, refractory and combustible, which emits infrared radiation during its combustion; and
  • at least one ignition means for triggering said combustion.

Ainsi, grâce à l'invention, ledit dispositif n'émet pas de particules dangereuses. De plus, les rayonnements émis peuvent être filtrés et leur intensité modulée, comme on le verra ci-dessous.Thus, thanks to the invention, said device does not emit particles dangerous. In addition, the radiation emitted can be filtered and their modulated intensity, as will be seen below.

En outre, grâce aux qualités réfractaires du fil métallique, la combustion n'entraíne pas de dépôt d'oxyde métallique sur le support dudit dispositif, par exemple une vitre, et elle ne doit donc pas être réalisée dans le vide et peut par exemple être réalisée directement à l'air libre.In addition, thanks to the refractory qualities of the metal wire, the combustion does not cause metal oxide deposition on the support of said device, for example a window, and therefore should not be carried out in a vacuum and can for example be carried out directly in the open air.

De préférence, ledit fil métallique est réalisé en l'un des métaux suivants : du tantale, du chrome et du zirconium.Preferably, said metal wire is made of one of the metals following: tantalum, chromium and zirconium.

A titre d'exemple, un fil de tantale qui présente les caractéristiques suivantes :

  • teneur en tantale   :   ≥ 99,9%
  • teneur en niobium   :   ≤ 1000 ppm
  • teneur en fer   :   ≤ 200 ppm
  • teneur en titane   :   ≤ 50 ppm
  • résidus de chloruration   :   ≤ 200 ppm
  • teneur en carbone   :   ≤ 50 ppm
  • teneur en oxygène   :   ≤ 100 ppm
  • teneur en hydrogène   :   ≤ 10 ppm
  • teneur en azote   :   ≤ 500 ppm
est particulièrement approprié à la mise en oeuvre de la présente invention. For example, a tantalum wire which has the following characteristics:
  • tantalum content: ≥ 99.9%
  • niobium content: ≤ 1000 ppm
  • iron content: ≤ 200 ppm
  • titanium content: ≤ 50 ppm
  • chlorination residue: ≤ 200 ppm
  • carbon content: ≤ 50 ppm
  • oxygen content: ≤ 100 ppm
  • hydrogen content: ≤ 10 ppm
  • nitrogen content: ≤ 500 ppm
is particularly suitable for the implementation of the present invention.

En outre, de façon avantageuse, ledit dispositif comporte :

  • des moyens d'alimentation en oxygène, par exemple une bouteille d'oxygène pressurisée avec un système de détente et d'alimentation ; ou
  • des moyens d'alimentation en air, par exemple par venturi, l'oxygène ou l'air fourni servant de comburant pour la combustion.
In addition, advantageously, said device comprises:
  • oxygen supply means, for example a pressurized oxygen cylinder with an expansion and supply system; or
  • air supply means, for example by venturi, oxygen or supplied air serving as oxidant for combustion.

Par ailleurs, avantageusement, ledit fil métallique est agencé sous forme de bobine, ce qui permet notamment de simplifier le montage et l'agencement dudit fil.Furthermore, advantageously, said metal wire is arranged under coil shape, which allows in particular to simplify assembly and the arrangement of said wire.

En outre, comme indiqué précédemment, on peut modifier l'intensité du rayonnement émis. A cet effet, ledit dispositif comporte selon l'invention :

  • des moyens pour modifier la pression dudit comburant ; et/ou
  • du fil métallique de diamètre variable, à savoir soit un seul fil, soit plusieurs fils, dont par exemple au moins deux présentent des diamètres différents et sont soudés l'un à l'autre ; et/ou
  • une bobine de fil métallique, dont le pas des spires est variable.
In addition, as indicated above, the intensity of the emitted radiation can be modified. To this end, said device comprises according to the invention:
  • means for changing the pressure of said oxidant; and or
  • metallic wire of variable diameter, namely either a single wire, or several wires, at least two of which for example have different diameters and are welded to each other; and or
  • a coil of metal wire, the pitch of which is variable.

De plus, de façon avantageuse, le dispositif conforme à l'invention comporte au moins deux moyens d'allumage, chacun desdits moyens d'allumage engendrant la combustion d'un fil métallique distinct et lesdites combustions sont engendrées à des moments différents, ce qui permet notamment d'adapter le cas échéant les différentes émissions de rayonnements infrarouges possibles aux phases de vol d'un engin volant porteur dudit dispositif.In addition, advantageously, the device according to the invention comprises at least two ignition means, each of said means ignition causing the combustion of a separate metal wire and said combustions are generated at different times, which allows in particular to adapt the different emissions of infrared radiation possible during the flight phases of a flying object wearer of said device.

Par ailleurs, avantageusement, ledit dispositif comporte de plus :

  • au moins un filtre optique susceptible de filtrer des rayonnements émis lors de la combustion ; et/ou
  • au moins une composition pyrotechnique, qui permet de maintenir, par sa combustion, une température élevée dans le dispositif même après la combustion d'un fil métallique.
Furthermore, advantageously, said device further comprises:
  • at least one optical filter capable of filtering radiation emitted during combustion; and or
  • at least one pyrotechnic composition, which makes it possible to maintain, by its combustion, a high temperature in the device even after the combustion of a metal wire.

Les figures du dessin annexé feront bien comprendre comment l'invention peut être réalisée. Sur ces figures, des références identiques désignent des éléments semblables.The figures in the accompanying drawing will make it clear how the invention can be realized. In these figures, identical references denote similar elements.

La figure 1 montre schématiquement un premier mode de réalisation d'un dispositif conforme à l'invention.Figure 1 schematically shows a first embodiment of a device according to the invention.

La figure 2 est une vue de dessus schématique du dispositif de la figure 1.Figure 2 is a schematic top view of the device of the figure 1.

La figure 3 illustre schématiquement une bobine munie de fils métalliques de diamètres différents.Figure 3 schematically illustrates a coil fitted with metallic wires of different diameters.

La figure 4 montre schématiquement un second mode de réalisation d'un dispositif conforme à l'invention.Figure 4 schematically shows a second embodiment of a device according to the invention.

Le dispositif conforme à l'invention et représenté dans deux modes de réalisation 1A et 1B différents sur les figures 1 et 4 est destiné à émettre des rayonnements infrarouges IR.The device according to the invention and represented in two modes 1A and 1B different in Figures 1 and 4 is intended to emit IR infrared radiation.

Ledit dispositif 1A, 1B peut notamment être monté sur un engin volant, par exemple un missile, non représenté, pour créer une trace le long de la trajectoire de vol dudit engin volant.Said device 1A, 1B can in particular be mounted on a machine flying, for example a missile, not shown, to create a track the along the flight path of said flying object.

Selon l'invention, ledit dispositif 1A comporte, tel que représenté sur la figure 1 :

  • un support 2, monté par exemple à l'arrière d'un missile antichar ;
  • un ensemble E de bobines 3 représentées également sur la figure 2 et agencées dans ledit support 2. Chacune desdites bobines 3 comporte un support de bobine 4, par exemple en un métal inoxydable, et au moins un fil métallique F1, F2, comme représenté sur la figure 3. Chacun desdits fils métalliques F1, F2 est réalisé en un matériau réfractaire et combustible, précisé ci-dessous et il émet des rayonnements infrarouges IR lors de sa combustion ; et
  • au moins un moyen d'allumage 5, par exemple un moyen de chauffage électrique, pour déclencher la combustion des fils métalliques F1, F2 desdites bobines 3, comme illustré par une flèche 6 en traits mixtes.
According to the invention, said device 1A comprises, as shown in FIG. 1:
  • a support 2, mounted for example at the rear of an anti-tank missile;
  • a set E of coils 3 also shown in FIG. 2 and arranged in said support 2. Each of said coils 3 comprises a coil support 4, for example made of a stainless metal, and at least one metal wire F1, F2, as shown in Figure 3. Each of said metal wires F1, F2 is made of a refractory and combustible material, specified below and it emits infrared radiation IR during its combustion; and
  • at least one ignition means 5, for example an electric heating means, for triggering the combustion of the metallic wires F1, F2 of said coils 3, as illustrated by an arrow 6 in dashed lines.

Ainsi, grâce à l'invention, on obtient un dispositif 1A simple et non dangereux (puisqu'il n'émet pas de particules), pour engendrer un rayonnement infrarouge IR.Thus, thanks to the invention, a simple 1A device is obtained and non-hazardous (since it does not emit particles), to generate a IR infrared radiation.

En outre, grâce aux qualités réfractaires du fil métallique F1, F2, la combustion n'entraíne pas de dépôt d'oxyde sur le support 2. Par conséquent, il n'est pas nécessaire de réaliser le vide à l'intérieur dudit support 2, et la combustion peut par exemple être effectuée à l'air ambiant.In addition, thanks to the refractory qualities of the metallic wire F1, F2, combustion does not cause oxide deposition on the support 2. Consequently, it is not necessary to create a vacuum inside said support 2, and the combustion can for example be carried out with ambient air.

Selon l'invention, ledit fil métallique F1, F2 peut notamment être réalisé en chrome, en zirconium ou en tantale, lesdits métaux devant présenter des qualités de pureté suffisantes pour permettre la mise en oeuvre de l'invention.According to the invention, said metal wire F1, F2 can in particular be made of chromium, zirconium or tantalum, said metals having to present sufficient purity qualities to allow processing of the invention.

A titre d'exemple, un fil de tantale qui présente les caractéristiques suivantes :

  • teneur en tantale   :   ≥ 99,9%
  • teneur en niobium   :   ≤ 1000 ppm
  • teneur en fer   :   ≤ 200 ppm
  • teneur en titane   :   ≤ 50 ppm
  • résidus de chloruration   :   ≤ 200 ppm
  • teneur en carbone   :   ≤ 50 ppm
  • teneur en oxygène   :   < 100 ppm
  • teneur en hydrogène   :   ≤ 10 ppm
  • teneur en azote   :   ≤ 500 ppm
est particulièrement approprié à la mise en oeuvre de la présente invention. For example, a tantalum wire which has the following characteristics:
  • tantalum content: ≥ 99.9%
  • niobium content: ≤ 1000 ppm
  • iron content: ≤ 200 ppm
  • titanium content: ≤ 50 ppm
  • chlorination residue: ≤ 200 ppm
  • carbon content: ≤ 50 ppm
  • oxygen content: <100 ppm
  • hydrogen content: ≤ 10 ppm
  • nitrogen content: ≤ 500 ppm
is particularly suitable for the implementation of the present invention.

De plus, la présente invention prévoit différentes solutions pour modifier et régler l'intensité du ou des rayonnements infrarouges IR émis.In addition, the present invention provides different solutions for modify and adjust the intensity of the IR infrared radiation emitted.

Une première solution consiste à modifier la pression du comburant utilisé pour la combustion des fils métalliques F1, F2. A cet effet, le dispositif 1A comporte

  • des moyens d'alimentation en comburant, à savoir notamment en oxygène, comportant une bouteille d'oxygène 7 pressurisée ; et
  • des moyens 8 pour régler la pression de l'oxygène fourni, comportant notamment un système de détente de type connu.
A first solution consists in modifying the pressure of the oxidizer used for the combustion of the metallic wires F1, F2. To this end, the device 1A comprises
  • means for supplying oxidant, namely in particular oxygen, comprising a pressurized oxygen cylinder 7; and
  • means 8 for regulating the pressure of the oxygen supplied, comprising in particular an expansion system of known type.

En variante, on eut également utiliser de l'air comme comburant. Cet air peut notamment être fourni par l'intermédiaire d'un venturi non représenté.Alternatively, air could also be used as an oxidizer. This air can in particular be supplied via a non-venturi represented.

Une deuxième solution pour modifier l'intensité des rayonnements infrarouges IR est de modifier le pas des spires des bobines 3.A second solution to modify the intensity of radiation infrared IR is to change the pitch of the coils 3.

En outre, une troisième solution consiste à modifier le diamètre du ou des fils métalliques F1, F2 utilisés. A cet effet, on peut :

  • soit modifier directement le diamètre d'un même fil métallique ;
  • soit relier les uns aux autres, par exemple par soudage par bombardement électrique, plusieurs fils métalliques F1, F2 de diamètres différents compris par exemple entre 0,2 et 2 mm, comme illustré sur la figure 3.
In addition, a third solution consists in modifying the diameter of the metal wire or wires F1, F2 used. To this end, we can:
  • either directly modify the diameter of the same metal wire;
  • either connect to each other, for example by electric bombardment welding, several metal wires F1, F2 of different diameters for example between 0.2 and 2 mm, as illustrated in FIG. 3.

On sait que le fil F2 de diamètre le plus faible présente la surface émissive et la combustion les plus élevées et engendre donc l'intensité de rayonnement la plus importante. Il présente ainsi la surface relative la plus élevée et donc la cinétique de combustion la plus rapide.We know that the smallest diameter F2 wire has the surface emissive and combustion and therefore generates the intensity of most important radiation. It thus presents the most relative surface high and therefore the fastest combustion kinetics.

Dans le cas où le dispositif 1A est utilisé comme traceur monté sur un engin volant, notamment un missile, il peut être judicieux de varier l'intensité en fonction de la phase de vol. A cet effet, il est généralement intéressant d'avoir une intensité faible au début du vol et une intensité plus forte à l'approche d'une cible à atteindre.In case the device 1A is used as a mounted plotter on a flying object, in particular a missile, it may be wise to vary intensity as a function of the flight phase. For this purpose, it is generally interesting to have a low intensity at the start of the flight and an intensity stronger when approaching a target to be reached.

Le dispositif 1A peut également servir au suivi et à la détection d'engins cibles et de drones. Dans ce cas, l'intensité doit être modifiée en fonction des conditions de vol.Device 1A can also be used for monitoring and detection target gear and drones. In this case, the intensity must be changed to depending on flight conditions.

Pour ce faire, on réalise la combustion dans le sens de la flèche F, pour l'exemple représenté sur la figure 3, c'est-à-dire dans le sens des diamètres de fil décroissants.To do this, combustion is carried out in the direction of arrow F, for the example shown in Figure 3, that is to say in the direction of decreasing wire diameters.

Dans le cadre de la présente invention, le dispositif 1A peut comporter, en variante du mode de réalisation de la figure 1 :

  • uniquement un seul fil métallique F1 ou F2, de diamètre constant ou variable ; ou
  • plusieurs fils métalliques F1, F2 séparés et plusieurs moyens d'allumage 5 associés respectivement auxdits fils métalliques et réalisant des déclenchements différés des combustions respectives.
In the context of the present invention, the device 1A can comprise, as a variant of the embodiment of FIG. 1:
  • only a single metal wire F1 or F2, of constant or variable diameter; or
  • several separate metal wires F1, F2 and several ignition means 5 associated respectively with said metal wires and producing deferred initiations of the respective combustions.

Par ailleurs, ledit dispositif 1A comporte :

  • un filtre 9 agencé sur le support 2 pour filtrer au moins certains des rayonnements émis lors de la combustion du ou des fils métalliques, tel que représenté sur la figure 1 ; et/ou
  • une composition pyrotechnique non représentée, qui est agencée dans le support de bobine 4, et qui permet de maintenir une température élevée dans le support 2 après la combustion du ou des fils métalliques F1, F2.
Furthermore, said device 1A comprises:
  • a filter 9 arranged on the support 2 for filtering at least some of the radiation emitted during the combustion of the metal wire or wires, as shown in FIG. 1; and or
  • a pyrotechnic composition, not shown, which is arranged in the coil support 4, and which makes it possible to maintain a high temperature in the support 2 after the combustion of the metal wire or wires F1, F2.

Dans un mode de réalisation particulier représenté sur la figure 4, le dispositif 1B comporte plusieurs supports 2, chacun de ceux-ci étant muni d'un ensemble E de bobines 3 et étant relié par un conduit C1, C2 d'alimentation en oxygène à la bouteille 7.In a particular embodiment shown in FIG. 4, the device 1B comprises several supports 2, each of these being provided with a set E of coils 3 and being connected by a conduit C1, C2 oxygen supply to the bottle 7.

L'agencement des différents supports 2 est variable et peut notamment être choisi en fonction de la structure ou de la mission de l'engin volant non représenté destiné à porter ledit dispositif 1B. En fonction de la pression d'oxygène et de l'écartement des spires, on peut privilégier un front de propagation concentrique ou radial, ou une combinaison de ces deux modes de propagation.The arrangement of the different supports 2 is variable and can in particular be chosen according to the structure or mission of the machine steering wheel not shown intended to carry said device 1B. Depending oxygen pressure and the spacing of the turns, we can favor a concentric or radial propagation front, or a combination of these two modes of propagation.

De plus, chacun desdits conduits C1 et C2 est muni d'une vanne 10 permettant de couper l'alimentation en oxygène, notamment dans le cas de combustions différées pour les différents ensembles E de bobines 3.In addition, each of said conduits C1 and C2 is provided with a valve 10 making it possible to cut off the oxygen supply, in particular in the case of delayed combustions for the different sets E of coils 3.

Claims (15)

  1. Device for emitting infrared radiation (IR), characterized in that it comprises:
    at least one refractory and combustible metal wire (F1, F2) which emits infrared radiation (IR) during its combustion; and
    at least one ignition means (5) for initiating the said combustion.
  2. Device according to Claim 1, characterized in that the said metal wire (F1) is made of one of the following metals: tantalum, chromium and zirconium.
  3. Device according to either of Claims 1 and 2, characterized in that it includes means (7) for supplying oxygen, which is used as oxidizer for the combustion.
  4. Device according to either of Claims 1 and 2, characterized in that it includes means for supplying air, which is used as oxidizer for the combustion.
  5. Device according to either of Claims 3 and 4, characterized in that it includes means (8) for modifying the pressure of the said oxidizer.
  6. Device according to any one of the preceding claims, characterized in that the said metal wire (F1, F2) is arranged in the form of a coil (3).
  7. Device according to Claim 6, characterized in that the said coil (3) of metal wire has turns of a variable pitch.
  8. Device according to any one of the preceding claims, characterized in that it includes a metal wire of variable diameter.
  9. Device according to Claim 8, characterized in that it includes at least two metal wires (F1, F2) of different diameters, welded to each other.
  10. Device according to any one of the preceding claims, characterized in that a propagation front is given preference, according to the pressure of the oxidizer and the spacing of the coils and of the turns.
  11. Device according to Claim 10, characterized in that the said preferential propagation front is concentric.
  12. Device according to either of Claims 10 and 11, characterized in that the said preferential propagation front is radial.
  13. Device according to any one of the preceding claims, characterized in that it includes at least two ignition means (5), each of the said ignition means (5) initiating the combustion of a separate metal wire and in that the said combustions are initiated at different moments.
  14. Device according to any one of the preceding claims, characterized in that it includes at least one optical filter (9) capable of filtering the radiation emitted during the combustion.
  15. Device according to any one of the preceding claims, characterized in that it includes at least one pyrotechnic composition.
EP19990400237 1998-02-16 1999-02-03 Device for emission of infrared radiation Expired - Lifetime EP0936436B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9801832 1998-02-16
FR9801832A FR2775070B1 (en) 1998-02-16 1998-02-16 DEVICE FOR TRANSMITTING INFRARED RADIATION

Publications (2)

Publication Number Publication Date
EP0936436A1 EP0936436A1 (en) 1999-08-18
EP0936436B1 true EP0936436B1 (en) 2002-07-31

Family

ID=9523003

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19990400237 Expired - Lifetime EP0936436B1 (en) 1998-02-16 1999-02-03 Device for emission of infrared radiation

Country Status (4)

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EP (1) EP0936436B1 (en)
DE (1) DE69902303T2 (en)
ES (1) ES2178355T3 (en)
FR (1) FR2775070B1 (en)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1274762A (en) * 1968-08-03 1972-05-17 Messerschmitt Boelkow Blohm Apparatus for emitting infra-red radiation
GB1259714A (en) * 1968-12-10 1972-01-12 Tokyo Shibaura Electric Co A flash lamp
BE757411A (en) * 1969-10-13 1971-04-13 Philips Nv FLASH COMBUSTION LAMP
FR2417078A1 (en) 1978-02-08 1979-09-07 Serat Tracer marker for projectiles and missiles - has one or more longitudinal apertures in sides to permit easy ejection of burn-off waste
DE3236418C2 (en) * 1982-10-01 1984-11-15 Bayern-Chemie Gesellschaft für flugchemische Antriebe mbH, 8261 Aschau Infrared light pack
FR2574535B1 (en) 1984-12-07 1987-09-25 Poudres & Explosifs Ste Nale PYROTECHNICAL PLOTTER HAVING AN IMPROVED IGNITION DEVICE
DE3603515C1 (en) * 1986-02-05 1987-04-09 Bayern Chemie Gmbh Flugchemie Temperature radiator

Also Published As

Publication number Publication date
EP0936436A1 (en) 1999-08-18
ES2178355T3 (en) 2002-12-16
FR2775070B1 (en) 2000-04-28
DE69902303T2 (en) 2003-03-06
FR2775070A1 (en) 1999-08-20
DE69902303D1 (en) 2002-09-05

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