EP1067357A1 - Two stage flying-plate optic detonator - Google Patents

Two stage flying-plate optic detonator Download PDF

Info

Publication number
EP1067357A1
EP1067357A1 EP00401936A EP00401936A EP1067357A1 EP 1067357 A1 EP1067357 A1 EP 1067357A1 EP 00401936 A EP00401936 A EP 00401936A EP 00401936 A EP00401936 A EP 00401936A EP 1067357 A1 EP1067357 A1 EP 1067357A1
Authority
EP
European Patent Office
Prior art keywords
stage
pyrotechnic
composition
pyrotechnic composition
detonator
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
EP00401936A
Other languages
German (de)
French (fr)
Other versions
EP1067357B1 (en
Inventor
Henry Moulard
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.)
Institut Franco Allemand de Recherches de Saint Louis ISL
Original Assignee
Institut Franco Allemand de Recherches de Saint Louis ISL
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Institut Franco Allemand de Recherches de Saint Louis ISL filed Critical Institut Franco Allemand de Recherches de Saint Louis ISL
Publication of EP1067357A1 publication Critical patent/EP1067357A1/en
Application granted granted Critical
Publication of EP1067357B1 publication Critical patent/EP1067357B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C06—EXPLOSIVES; MATCHES
    • C06C—DETONATING OR PRIMING DEVICES; FUSES; CHEMICAL LIGHTERS; PYROPHORIC COMPOSITIONS
    • C06C7/00—Non-electric detonators; Blasting caps; Primers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B3/00—Blasting cartridges, i.e. case and explosive
    • F42B3/10—Initiators therefor
    • F42B3/113—Initiators therefor activated by optical means, e.g. laser, flashlight

Definitions

  • the present invention relates to a detonator two-stage optics with shock-detonation transition.
  • a metal membrane is placed which, under the action of the combustion pressure of the 1st stage, is cut into a flake which acts like a piston and will compact the porous explosive of the 2nd stage and initiate combustion which, given the confinement, will trigger a deflagration-detonation transition process.
  • the object of the present invention is to remedy to the above drawbacks.
  • the invention thus relates to an optical detonator with two stages and with shock-detonation transition, in which the first stage includes a pyrotechnic composition and an optical fiber one end of which is connected to a laser radiation source, the other end adjacent to the pyrotechnic composition being engaged in a connector, means being inserted between the end of the optical fiber and the composition pyrotechnic to transmit laser radiation to the pyrotechnic composition, detonator in which the second stage includes a pyrotechnic composition placed in alignment with the pyrotechnic composition on the first floor and separated from it by means of transmission of the shock wave generated by the ignition of the pyrotechnic composition of the first floor.
  • this optical detonator is characterized in that the means which separate the pyrotechnic composition of the first stage from that of second stage include a metal plate of which one side is in contact with the composition pyrotechnic on the first floor and the other side of which is adjacent to a cavity which separates it from the composition second stage pyrotechnic and is supported by its periphery against the end of an element of confinement of the pyrotechnic composition of the second floor.
  • the plate metallic above is propelled at high speed on the bare surface of the pyrotechnic composition of the second floor.
  • this plate Upon impact, this plate initiates in the pyrotechnic composition a shock-detonation transition.
  • This shock-detonation transition is favored by a focusing effect of the shock wave.
  • This shock-detonation transition allows make a shorter detonator, containing less pyrotechnic composition, more insensitive, more reproducible and with a shorter response time than in the case of the solution mentioned at the beginning of this description.
  • the diameter of the cavity is higher than that of the pyrotechnic composition, the end face of the pyrotechnic composition adjacent to the cavity being merged with the face constituting the bottom of said cavity.
  • the wafer during its impact collides simultaneously with the composition pyrotechnic and with the end face of the cavity.
  • This arrangement makes it possible to focus the shock wave on the pyrotechnic composition.
  • FIG. 1 represents an optical detonator with two stages and with shock-detonation transition, in which the first stage 1 includes a composition pyrotechnic 2 and an optical fiber 3 including one end is connected to a radiation source laser such as a laser diode.
  • a radiation source laser such as a laser diode.
  • optical fiber 3 adjacent to pyrotechnic composition 2 is engaged in a connector 4.
  • Means which will be described later, are inserted between the end 3a of the optical fiber 3 and the pyrotechnic composition 2 to transmit the laser radiation towards the pyrotechnic composition 2.
  • the second stage 5 of the detonator comprises a pyrotechnic composition 6 placed in alignment with the pyrotechnic composition 2 of the first stage 1 and separated from the latter by means of transmission of the shock wave generated by the ignition of the pyrotechnic composition 2 of the first stage 1.
  • the means which separate the pyrotechnic composition 2 from the first stage 1 of that of the second stage 5 include a plate metal 7, one face of which is in contact with the pyrotechnic composition 2 of the first stage 1 and of which the other face is adjacent to a cavity 8 which separates it of the pyrotechnic composition 6 of the second stage 5.
  • This metal plate 7 is supported by its periphery against the end 9a of an element of containment 9 of the pyrotechnic composition 6 of the second floor 5.
  • the pyrotechnic composition 2 of the first stage 1 is confined in a confinement element 10 which is axially and detachably connected to the element of containment 9 of the pyrotechnic composition 6 of the second floor 5.
  • the plate 7 can be in steel and has a thickness between 100 and 250 micrometers.
  • the laser energy transmitted to the composition pyrotechnic 2 of the first stage 1 and the characteristics of this composition must preferably be such that the plate 7 can be propelled into the cavity 8 at a speed at least equal at 500 m / s under the effect of the pressure developed after ignition of the pyrotechnic composition 2.
  • the composition pyrotechnic 2 includes octogen having a loading density of the order of 1.65 g / cm3 and a particle size of the order of 3 micrometers.
  • the octogen can be mixed with about 1% of ultra fine carbon black to promote absorption in the near infrared.
  • the pyrotechnic composition 6 of the second stage 5 includes octogen or hexogen in granular form and having a density greater than 1.4 g / cm3.
  • Figure 1 also shows that the means to transmit laser radiation from the fiber optics 3 towards the pyrotechnic composition 2 of the first stage 1 include a ring 11 in the recess of which is housed a glass ball 12.
  • This ring 11 is in contact with the end of the connector 4 of the optical fiber 3 and with a glass plate 13 itself in contact with the pyrotechnic composition 2 of the first stage 1.
  • This provision allows a transmission of the laser radiation towards the pyrotechnic composition 2, without loss of surface energy.
  • the means for transmitting the laser radiation between the optical fiber 3 and the pyrotechnic composition 2 of the first stage 1 include a glass rod 14 to index gradient housed in an element 15 of low material thermally conductive.
  • This glass rod 14 is able to focus the laser radiation from the optical fiber 3 on the face of the composition pyrotechnic 2 of the first stage 1 with which this glass rod 14 is in contact.
  • This glass rod 14 can be in two parts.
  • the laser radiation carried by the fiber optical 3 transmits its energy to the composition pyrotechnic 2 and generates the combustion thereof.
  • the pressure developed by the combustion of this composition 2 propels the wafer 7 to a speed greater than 500 m / s in cavity 8 towards the bare surface 6a of the pyrotechnic composition 6 of the second floor.
  • the shock wave generated at the impact of this plate 7 on the surface 6a of the composition pyrotechnic initiates the detonation thereof.
  • the reduction in the total mass of the pyrotechnic composition is important, especially when of the application of the detonator according to the invention for order the separation of two floors of a vessel spatial because it reduces the intensity of pyrotechnic shocks transmitted to this vessel.

Abstract

The two-stage optical detonator has a first stage (1) containing a pyrotechnic compound (2) and linked via an optical fibre (3) to a laser radiation source. The first and second stage pyrotechnic compounds are separated by a metal plate (7) which has one face in contact with the first stage pyrotechnic compound and the other adjacent to a cavity (8) separating it from the second stage pyrotechnic compound (5). The periphery of the metal plate is in contact with the end (9a) of the second stage compound container (9).

Description

La présente invention concerne un détonateur optique à deux étages et à transition choc-détonation.The present invention relates to a detonator two-stage optics with shock-detonation transition.

Pour réaliser un détonateur optique avec des sources laser de faible puissance telles que les diodes laser envisagées dans les applications spatiales, on a recours à l'heure actuelle à un détonateur à deux étages : le premier étant utilisé pour l'allumage thermique par le laser d'une combustion et le second étage étant dédié à une transition déflagration-détonation.To make an optical detonator with low power laser sources such as diodes laser considered in space applications, we have currently using a two-piece detonator stages: the first being used for ignition thermal by the laser of a combustion and the second stage being dedicated to a deflagration-detonation transition.

A l'interface entre les deux étages, est placée une membrane métallique qui sous l'action de la pression de combustion du 1er étage se découpe en paillet qui agit comme un piston et va compacter l'explosif poreux du 2ème étage et initier une combustion qui, compte tenu du confinement va déclencher un processus de transition déflagration-détonation.At the interface between the two stages, a metal membrane is placed which, under the action of the combustion pressure of the 1st stage, is cut into a flake which acts like a piston and will compact the porous explosive of the 2nd stage and initiate combustion which, given the confinement, will trigger a deflagration-detonation transition process.

Les inconvénients de ce concept sont liés à l'utilisation du processus de transition déflagration-détonation. Cela nécessite :

  • l'utilisation d'un explosif à basse densité de chargement (1.1 g/cm3), en fait proche de la densité de tassement pour avoir une porosité importante et aussi des grosses granulométries : ceci augmente la sensibilité du composant pyrotechnique et est peu favorable pour assurer une bonne reproductibilité de chargement dans ses petits composants ;
  • une longueur suffisante du 2ème étage afin d'atteindre le point de transition à la détonation : ce qui en pratique augmente notablement la quantité d'explosif utilisé.
The disadvantages of this concept are related to the use of the deflagration-detonation transition process. This requires :
  • the use of an explosive with low loading density (1.1 g / cm3), in fact close to the packing density to have a high porosity and also large particle sizes: this increases the sensitivity of the pyrotechnic component and is not favorable for ensuring good reproducibility of loading in its small components;
  • a sufficient length of the 2nd stage in order to reach the point of transition to the detonation: which in practice significantly increases the amount of explosive used.

Le but de la présente invention est de remédier aux inconvénients ci-dessus.The object of the present invention is to remedy to the above drawbacks.

L'invention vise ainsi un détonateur optique à deux étapes et à transition choc-détonation, dans lequel le premier étage comprend une composition pyrotechnique et une fibre optique dont une extrémité est raccordée à une source de rayonnement laser, l'autre extrémité adjacente à la composition pyrotechnique étant engagée dans un connecteur, des moyens étant insérés entre l'extrémité de la fibre optique et la composition pyrotechnique pour transmettre le rayonnement laser vers la composition pyrotechnique, détonateur dans lequel le second étage comprend une composition pyrotechnique placée dans l'alignement de la composition pyrotechnique du premier étage et séparée de cette dernière par des moyens de transmission de l'onde de choc générée par l'allumage de la composition pyrotechnique du premier étage.The invention thus relates to an optical detonator with two stages and with shock-detonation transition, in which the first stage includes a pyrotechnic composition and an optical fiber one end of which is connected to a laser radiation source, the other end adjacent to the pyrotechnic composition being engaged in a connector, means being inserted between the end of the optical fiber and the composition pyrotechnic to transmit laser radiation to the pyrotechnic composition, detonator in which the second stage includes a pyrotechnic composition placed in alignment with the pyrotechnic composition on the first floor and separated from it by means of transmission of the shock wave generated by the ignition of the pyrotechnic composition of the first floor.

Suivant l'invention, ce détonateur optique est caractérisé en ce que les moyens qui séparent la composition pyrotechnique du premier étage de celle du second étage comprennent une plaquette métallique dont une face est en contact avec la composition pyrotechnique du premier étage et dont l'autre face est adjacente à une cavité qui la sépare de la composition pyrotechnique du second étage et est en appui par sa périphérie contre l'extrémité d'un élément de confinement de la composition pyrotechnique du second étage.According to the invention, this optical detonator is characterized in that the means which separate the pyrotechnic composition of the first stage from that of second stage include a metal plate of which one side is in contact with the composition pyrotechnic on the first floor and the other side of which is adjacent to a cavity which separates it from the composition second stage pyrotechnic and is supported by its periphery against the end of an element of confinement of the pyrotechnic composition of the second floor.

Grâce à la pression de la combustion vive générée lors de l'allumage de la combustion de la composition pyrotechnique du premier étage, la plaquette métallique ci-dessus est propulsée à grande vitesse sur la surface nue de la composition pyrotechnique du second étage. Thanks to the pressure of lively combustion generated when igniting the combustion of the pyrotechnic composition of the first stage, the plate metallic above is propelled at high speed on the bare surface of the pyrotechnic composition of the second floor.

Lors de son impact, cette plaquette amorce dans la composition pyrotechnique une transition choc-détonation.Upon impact, this plate initiates in the pyrotechnic composition a shock-detonation transition.

Cette transition choc-détonation est favorisée par un effet de focalisation de l'onde de choc.This shock-detonation transition is favored by a focusing effect of the shock wave.

Cette transition choc-détonation permet de réaliser un détonateur moins long, contenant moins de composition pyrotechnique, plus insensible, plus reproductible et avec un temps de réponse plus court que dans le cas de la solution évoquée au début de cette description.This shock-detonation transition allows make a shorter detonator, containing less pyrotechnic composition, more insensitive, more reproducible and with a shorter response time than in the case of the solution mentioned at the beginning of this description.

De préférence, le diamètre de la cavité est supérieur à celui de la composition pyrotechnique, la face d'extrémité de la composition pyrotechnique adjacente à la cavité étant confondue avec la face constituant le fond de ladite cavité.Preferably, the diameter of the cavity is higher than that of the pyrotechnic composition, the end face of the pyrotechnic composition adjacent to the cavity being merged with the face constituting the bottom of said cavity.

De ce fait, la plaquette lors de son impact entre en collision simultanément avec la composition pyrotechnique et avec la face d'extrémité de la cavité. Cette disposition permet de focaliser l'onde de choc sur la composition pyrotechnique.Therefore, the wafer during its impact collides simultaneously with the composition pyrotechnic and with the end face of the cavity. This arrangement makes it possible to focus the shock wave on the pyrotechnic composition.

D'autres particularités et avantages de l'invention apparaítront encore dans la description ci-après.Other features and advantages of the invention will appear further in the description below.

Aux dessins annexés donnés à titre d'exemples non limitatifs :

  • la figure 1 est une vue en coupe longitudinale d'un détonateur optique à deux étages selon l'invention ;
  • la figure 2 est une vue en coupe longitudinale partielle, montrant une variante de réalisation de l'invention.
In the appended drawings given by way of nonlimiting examples:
  • Figure 1 is a longitudinal sectional view of a two-stage optical detonator according to the invention;
  • Figure 2 is a partial longitudinal sectional view showing an alternative embodiment of the invention.

La figure 1 représente un détonateur optique à deux étages et à transition choc-détonation, dans lequel le premier étage 1 comprend une composition pyrotechnique 2 et une fibre optique 3 dont une extrémité est raccordée à une source de rayonnement laser telle qu'une diode laser.FIG. 1 represents an optical detonator with two stages and with shock-detonation transition, in which the first stage 1 includes a composition pyrotechnic 2 and an optical fiber 3 including one end is connected to a radiation source laser such as a laser diode.

L'autre extrémité de la fibre optique 3 adjacente à la composition pyrotechnique 2 est engagée dans un connecteur 4.The other end of optical fiber 3 adjacent to pyrotechnic composition 2 is engaged in a connector 4.

Des moyens qui seront décrits plus loin, sont insérés entre l'extrémité 3a de la fibre optique 3 et la composition pyrotechnique 2 pour transmettre le rayonnement laser vers la composition pyrotechnique 2.Means which will be described later, are inserted between the end 3a of the optical fiber 3 and the pyrotechnic composition 2 to transmit the laser radiation towards the pyrotechnic composition 2.

Le second étage 5 du détonateur comprend une composition pyrotechnique 6 placée dans l'alignement de la composition pyrotechnique 2 du premier étage 1 et séparée de cette dernière par des moyens de transmission de l'onde de choc générée par l'allumage de la composition pyrotechnique 2 du premier étage 1.The second stage 5 of the detonator comprises a pyrotechnic composition 6 placed in alignment with the pyrotechnic composition 2 of the first stage 1 and separated from the latter by means of transmission of the shock wave generated by the ignition of the pyrotechnic composition 2 of the first stage 1.

Conformément à l'invention, les moyens qui séparent la composition pyrotechnique 2 du premier étage 1 de celle du second étage 5 comprennent une plaquette métallique 7 dont une face est en contact avec la composition pyrotechnique 2 du premier étage 1 et dont l'autre face est adjacente à une cavité 8 qui la sépare de la composition pyrotechnique 6 du second étage 5.In accordance with the invention, the means which separate the pyrotechnic composition 2 from the first stage 1 of that of the second stage 5 include a plate metal 7, one face of which is in contact with the pyrotechnic composition 2 of the first stage 1 and of which the other face is adjacent to a cavity 8 which separates it of the pyrotechnic composition 6 of the second stage 5.

Cette plaquette métallique 7 est en appui par sa périphérie contre l'extrémité 9a d'un élément de confinement 9 de la composition pyrotechnique 6 du second étage 5.This metal plate 7 is supported by its periphery against the end 9a of an element of containment 9 of the pyrotechnic composition 6 of the second floor 5.

La composition pyrotechnique 2 du premier étage 1 est confinée dans un élément de confinement 10 qui est raccordé axialement et de façon amovible à l'élément de confinement 9 de la composition pyrotechnique 6 du second étage 5.The pyrotechnic composition 2 of the first stage 1 is confined in a confinement element 10 which is axially and detachably connected to the element of containment 9 of the pyrotechnic composition 6 of the second floor 5.

Dans l'exemple représenté, les deux éléments de confinement 9, 10 sont raccordés ensemble par vissage.In the example shown, the two elements of containment 9, 10 are connected together by screwing.

On voit également sur la figure 1 que la face d'extrémité 6a de la composition pyrotechnique 6 adjacente à la cavité 8 est confondue avec la face constituant le fond de la cavité 8 dont le diamètre est supérieur à celui de la composition pyrotechnique 6.We also see in Figure 1 that the face end 6a of the pyrotechnic composition 6 adjacent to cavity 8 coincides with the face constituting the bottom of the cavity 8 whose diameter is higher than that of the pyrotechnic composition 6.

A titre d'exemple, la plaquette 7 peut être en acier et présente une épaisseur comprise entre 100 et 250 micromètres.By way of example, the plate 7 can be in steel and has a thickness between 100 and 250 micrometers.

L'énergie laser transmise à la composition pyrotechnique 2 du premier étage 1 et les caractéristiques de cette composition doivent de préférence être telles que la plaquette 7 puisse être propulsée dans la cavité 8 à une vitesse au moins égale à 500 m/s sous l'effet de la pression développée après l'allumage de la composition pyrotechnique 2.The laser energy transmitted to the composition pyrotechnic 2 of the first stage 1 and the characteristics of this composition must preferably be such that the plate 7 can be propelled into the cavity 8 at a speed at least equal at 500 m / s under the effect of the pressure developed after ignition of the pyrotechnic composition 2.

De préférence également, la composition pyrotechnique 2 comprend de l'octogène présentant une densité de chargement de l'ordre de 1,65 g/cm3 et une granulométrie de l'ordre de 3 micromètres.Also preferably, the composition pyrotechnic 2 includes octogen having a loading density of the order of 1.65 g / cm3 and a particle size of the order of 3 micrometers.

L'octogène peut être mélangé avec environ 1% de noir de carbone ultra fin pour favoriser l'absorption dans le proche infra-rouge.The octogen can be mixed with about 1% of ultra fine carbon black to promote absorption in the near infrared.

De préférence, la composition pyrotechnique 6 du second étage 5 comprend de l'octogène ou de l'hexogène sous forme granulaire et présentant une densité supérieure à 1,4 g/cm3.Preferably, the pyrotechnic composition 6 of the second stage 5 includes octogen or hexogen in granular form and having a density greater than 1.4 g / cm3.

La figure 1 montre d'autre part que les moyens pour transmettre le rayonnement laser depuis la fibre optique 3 vers la composition pyrotechnique 2 du premier étage 1 comprennent une bague 11 dans l'évidement de laquelle est logée une bille en verre 12.Figure 1 also shows that the means to transmit laser radiation from the fiber optics 3 towards the pyrotechnic composition 2 of the first stage 1 include a ring 11 in the recess of which is housed a glass ball 12.

Cette bague 11 est en contact avec l'extrémité du connecteur 4 de la fibre optique 3 et avec une plaquette en verre 13 elle-même en contact avec la composition pyrotechnique 2 du premier étage 1.This ring 11 is in contact with the end of the connector 4 of the optical fiber 3 and with a glass plate 13 itself in contact with the pyrotechnic composition 2 of the first stage 1.

Cette disposition permet une transmission du rayonnement laser vers la composition pyrotechnique 2, sans perte d'énergie surfacique. This provision allows a transmission of the laser radiation towards the pyrotechnic composition 2, without loss of surface energy.

Dans la variante représentée sur la figure 2, les moyens pour transmettre le rayonnement laser entre la fibre optique 3 et la composition pyrotechnique 2 du premier étage 1 comprennent un barreau en verre 14 à gradient d'indice logé dans un élément 15 en matière peu conductrice thermiquement. Ce barreau en verre 14 est capable de focaliser le rayonnement laser issu de la fibre optique 3 sur la face de la composition pyrotechnique 2 du premier étage 1 avec laquelle ce barreau en verre 14 est en contact. Ce barreau en verre 14 peut être en deux parties.In the variant shown in Figure 2, the means for transmitting the laser radiation between the optical fiber 3 and the pyrotechnic composition 2 of the first stage 1 include a glass rod 14 to index gradient housed in an element 15 of low material thermally conductive. This glass rod 14 is able to focus the laser radiation from the optical fiber 3 on the face of the composition pyrotechnic 2 of the first stage 1 with which this glass rod 14 is in contact. This glass rod 14 can be in two parts.

Le dispositif que l'on vient de décrire fonctionne de la façon suivante.The device that we have just described works as follows.

Dans le cas du détonateur représenté sur la figure 1, le rayonnement laser véhiculé par la fibre optique 3 transmet son énergie à la composition pyrotechnique 2 et génère la combustion de celle-ci.In the case of the detonator shown in the Figure 1, the laser radiation carried by the fiber optical 3 transmits its energy to the composition pyrotechnic 2 and generates the combustion thereof.

La pression développée par la combustion de cette composition 2 propulse la plaquette 7 à une vitesse supérieure à 500 m/s dans la cavité 8 vers la surface nue 6a de la composition pyrotechnique 6 du second étage.The pressure developed by the combustion of this composition 2 propels the wafer 7 to a speed greater than 500 m / s in cavity 8 towards the bare surface 6a of the pyrotechnic composition 6 of the second floor.

L'onde choc engendrée à l'impact de cette plaquette 7 sur la surface 6a de la composition pyrotechnique amorce la détonation de celle-ci.The shock wave generated at the impact of this plate 7 on the surface 6a of the composition pyrotechnic initiates the detonation thereof.

L'ensemble des dispositions ci-dessus permet de réaliser un détonateur moins long, contenant moins de composition pyrotechnique, plus insensible, plus reproductible et avec un temps de réponse plus court que dans le cas de la solution évoquée au début de cette description.All of the above provisions allow make a shorter detonator, containing less pyrotechnic composition, more insensitive, more reproducible and with a shorter response time than in the case of the solution mentioned at the beginning of this description.

La réduction de la masse totale de la composition pyrotechnique est importante, notamment lors de l'application du détonateur selon l'invention pour commander la séparation de deux étages d'un vaisseau spatial, car elle permet de réduire l'intensité des chocs pyrotechniques transmis à ce vaisseau.The reduction in the total mass of the pyrotechnic composition is important, especially when of the application of the detonator according to the invention for order the separation of two floors of a vessel spatial because it reduces the intensity of pyrotechnic shocks transmitted to this vessel.

Bien entendu, l'invention n'est pas limitée à l'exemple que l'on vient de décrire et on peut apporter à celui-ci de nombreuses modifications sans sortir du cadre de l'invention.Of course, the invention is not limited to the example that we just described and we can bring to this one many modifications without leaving the part of the invention.

Claims (11)

Détonateur optique à deux étages et à transition choc-détonation, dans lequel le premier étage (1) comprend une composition pyrotechnique (2) et une fibre optique (3) dont une extrémité est raccordée à une source de rayonnement laser, l'autre extrémité adjacente à la composition pyrotechnique (2) étant engagée dans un connecteur (4), des moyens étant insérés entre l'extrémité de la fibre optique (3) et la composition pyrotechnique (2) pour transmettre le rayonnement laser vers la composition pyrotechnique (2), détonateur dans lequel le second étage (5) comprend une composition pyrotechnique (6) placée dans l'alignement de la composition pyrotechnique (2) du premier étage (1) et séparée de cette dernière par des moyens de transmission de l'onde de choc générée par l'allumage de la composition pyrotechnique (2) du premier étage (1), caractérisé en ce que les moyens qui séparent la composition pyrotechnique (2) du premier étage (1) de celle du second étage (5) comprennent une plaquette métallique (7) dont une face est en contact avec la composition pyrotechnique (2) du premier étage (1) et dont l'autre face est adjacente à une cavité (8) qui la sépare de la composition pyrotechnique (6) du second étage (5) et est en appui par sa périphérie contre l'extrémité (9a) d'un élément de confinement (9) de la composition pyrotechnique (6) du second étage (5).Two-stage optical detonator with shock-detonation transition, in which the first stage (1) comprises a pyrotechnic composition (2) and a optical fiber (3) one end of which is connected to a laser radiation source, the other adjacent end to the pyrotechnic composition (2) being engaged in a connector (4), means being inserted between the end of the optical fiber (3) and the composition pyrotechnic (2) to transmit laser radiation to the pyrotechnic composition (2), detonator in which the second stage (5) comprises a composition pyrotechnic (6) placed in alignment with the first stage pyrotechnic composition (2) (1) and separated from the latter by means of transmission of the shock wave generated by the ignition of the first stage pyrotechnic composition (2) (1), characterized in that the means which separate the pyrotechnic composition (2) of the first stage (1) of that of the second stage (5) include a plate metallic (7) one face of which is in contact with the first stage pyrotechnic composition (2) (1) and the other side of which is adjacent to a cavity (8) which separates from the pyrotechnic composition (6) the second stage (5) and is supported by its periphery against the end (9a) of a containment element (9) of the second stage pyrotechnic composition (6) (5). Détonateur optique conforme à la revendication 1, caractérisé en ce que le diamètre de la cavité (8) est supérieur à celui de la composition pyrotechnique (6), la face d'extrémité (6a) de la composition pyrotechnique (6) adjacente à la cavité (8) étant confondue avec la face constituant le fond de ladite cavité (8).Optical detonator conforms to the claim 1, characterized in that the diameter of the cavity (8) is greater than that of the composition pyrotechnic (6), the end face (6a) of the pyrotechnic composition (6) adjacent to the cavity (8) being confused with the face constituting the bottom of said cavity (8). Détonateur optique conforme à la revendication 1, caractérisé en ce que la composition pyrotechnique (2) du premier étage (1) est confinée dans un élément de confinement (10) qui est raccordé axialement et de façon amovible à l'élément de confinement (9) de la composition pyrotechnique (6) du second étage (5).Optical detonator conforms to the claim 1, characterized in that the composition pyrotechnic (2) of the first stage (1) is confined in a containment element (10) which is connected axially and removably to the element of confinement (9) of the pyrotechnic composition (6) of the second floor (5). Détonateur optique conforme à la revendication 3, caractérisé en ce que les deux éléments de confinement (9, 10) sont raccordés ensemble par vissage.Optical detonator conforms to the claim 3, characterized in that the two elements containment (9, 10) are connected together by screwing. Détonateur optique conforme à l'une des revendications 1 à 4, caractérisé en ce que la plaquette (7) est en acier et présente une épaisseur comprise entre 100 et 250 micromètres.Optical detonator conforms to one of the Claims 1 to 4, characterized in that the plate (7) is made of steel and has a thickness included between 100 and 250 micrometers. Détonateur optique conforme à l'une des revendications 1 à 5, caractérisé en ce que l'énergie laser transmise à la composition pyrotechnique (2) du premier étage (1) et les caractéristiques de cette composition sont telles que la plaquette (7) est propulsée dans la cavité (8) à une vitesse au moins égale à 500 m/s après l'allumage de la composition pyrotechnique (2) ci-dessus.Optical detonator conforms to one of the claims 1 to 5, characterized in that the energy laser transmitted to the pyrotechnic composition (2) of the first floor (1) and the characteristics of this composition are such that the plate (7) is propelled into the cavity (8) at a speed at least equal to 500 m / s after ignition of the composition pyrotechnic (2) above. Détonateur optique conforme à l'une des revendications 1 à 6, caractérisé en ce que la composition pyrotechnique (2) du premier étage (1), comprend de l'octogène présentant une densité de chargement de l'ordre de 1,65 g/cm3 et une granulométrie de l'ordre de 3 micromètres. Optical detonator conforms to one of the claims 1 to 6, characterized in that the first stage pyrotechnic composition (2) (1), includes octogen having a density of loading of the order of 1.65 g / cm3 and a particle size on the order of 3 micrometers. Détonateur optique conforme à la revendication 7, caractérisé en ce que l'octogène est mélangé avec environ 1% de poudre de noir de carbone ultra fin.Optical detonator conforms to the claim 7, characterized in that the octogen is mixed with about 1% carbon black powder ultra thin. Détonateur optique conforme à l'une des revendications 1 à 8, caractérisé en ce que la composition pyrotechnique (6) du second étage (5) comprend de l'octogène ou de l'hexogène sous forme granulaire et présentant une densité supérieure à 1,4 g/cm3.Optical detonator conforms to one of the Claims 1 to 8, characterized in that the second stage pyrotechnic composition (6) (5) includes octogen or hexogen in the form granular and having a density greater than 1.4 g / cm3. Détonateur optique conforme à l'une des revendications 1 à 9, caractérisé en ce que les moyens pour transmettre le rayonnement laser depuis la fibre optique (3) vers la composition pyrotechnique (2) du premier étage (1) comprennent une bague (11) dans l'évidement duquel est logée une bille en verre (12), cette bague (11) étant en contact avec l'extrémité du connecteur (4) de la fibre optique (3) et avec une plaquette en verre (13) elle-même en contact avec la composition pyrotechnique (2) du premier étage (1).Optical detonator conforms to one of the Claims 1 to 9, characterized in that the means to transmit laser radiation from the fiber optics (3) towards the pyrotechnic composition (2) of the first stage (1) include a ring (11) in the recess of which a glass ball (12) is housed, this ring (11) being in contact with the end of the connector (4) of the optical fiber (3) and with a glass plate (13) itself in contact with the first stage pyrotechnic composition (2) (1). Détonateur optique conforme à l'une des revendications 1 à 9, caractérisé en ce que les moyens pour transmettre le rayonnement laser entre la fibre optique (3) et la composition pyrotechnique (2) du premier étage (1) comprennent un barreau en verre (14) à gradient d'indice logé dans un élément (15) en matière peu conductrice thermiquement, ce barreau en verre (14) étant capable de focaliser le rayonnement laser issu de la fibre optique (3) sur la face de la composition pyrotechnique (2) du premier étage (1) avec laquelle ce barreau en verre (14) est en contact.Optical detonator conforms to one of the Claims 1 to 9, characterized in that the means to transmit laser radiation between the fiber optics (3) and the pyrotechnic composition (2) of the first stage (1) include a glass rod (14) to index gradient housed in a material element (15) not very thermally conductive, this glass rod (14) being able to focus the laser radiation from the optical fiber (3) on the face of the composition first stage pyrotechnic (2) (1) with which this glass rod (14) is in contact.
EP00401936A 1999-07-06 2000-07-05 Two stage flying-plate optic detonator Expired - Lifetime EP1067357B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9908715 1999-07-06
FR9908715A FR2796142B1 (en) 1999-07-06 1999-07-06 TWO-STAGE OPTICAL DETONATOR WITH SHOCK-DETONATION TRANSITION

Publications (2)

Publication Number Publication Date
EP1067357A1 true EP1067357A1 (en) 2001-01-10
EP1067357B1 EP1067357B1 (en) 2003-11-05

Family

ID=9547764

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00401936A Expired - Lifetime EP1067357B1 (en) 1999-07-06 2000-07-05 Two stage flying-plate optic detonator

Country Status (4)

Country Link
US (1) US6374740B1 (en)
EP (1) EP1067357B1 (en)
DE (1) DE60006322T2 (en)
FR (1) FR2796142B1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2831659A1 (en) * 2001-10-26 2003-05-02 Saint Louis Inst LOW ENERGY OPTICAL DETONATOR
EP2386819A1 (en) 2010-05-10 2011-11-16 Institut Franco-Allemand de Recherches de Saint-Louis Firing device for an initiator
DE202016008788U1 (en) 2016-10-27 2019-08-29 IBD Deisenroth Engineering GmbH An ignition material, in particular for use in an optical detonator and ignition means with such an ignition material

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19837839A1 (en) * 1998-08-20 2000-02-24 Dynamit Nobel Ag Detonator for explosive material for vehicle airbag or seatbelt tensioner, has laser diode with transparent housing in direct contact with explosive material
FR2846408B1 (en) * 2002-10-23 2005-06-03 Dassault Aviat DEVICE FOR INITIATING A PYROTECHNIC CHARGE
US20040231546A1 (en) * 2003-05-23 2004-11-25 Ofca William W. Safe electrical initiation plug for electric detonators
PE20060926A1 (en) * 2004-11-02 2006-09-04 Orica Explosives Tech Pty Ltd ASSEMBLIES OF WIRELESS DETONATORS, CORRESPONDING BLASTING APPLIANCES AND BLASTING METHODS
CN100465138C (en) * 2006-10-16 2009-03-04 西安庆华民用爆破器材有限责任公司 Inserting type connecting block for initiation net
JP2009007273A (en) * 2007-06-27 2009-01-15 Ajinomoto Co Inc Method for producing diaminopyrimidine compound
FR2960541B1 (en) * 2010-05-31 2012-05-04 Nexter Munitions SECURED DETONATOR
CA2811125C (en) * 2010-11-16 2016-04-26 Detnet South Africa (Pty) Ltd Connector assembly
FR2978762B1 (en) 2011-08-01 2013-08-02 Nexter Munitions SECURITY DETONATOR
WO2017083885A1 (en) * 2015-11-09 2017-05-18 Detnet South Africa (Pty) Ltd Wireless detonator
CN114353600B (en) * 2022-01-17 2024-01-16 中北大学 Spacer type high-safety small-size laser detonation device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4735145A (en) * 1987-03-02 1988-04-05 The United States Of America As Represented By The United States Department Of Energy High temperature detonator
US4898095A (en) * 1986-10-20 1990-02-06 Nippon Oil And Fats Company, Limited And Kajima Corporation Laser beam-detonatable blasting cap
EP0397572A1 (en) * 1989-05-12 1990-11-14 AEROSPATIALE Société Nationale Industrielle Photopyrotechnic priming device comprising a microlens crimped with a material having shape recollection power and a pyrotechnic line using such device
WO1999000343A1 (en) * 1997-06-30 1999-01-07 The Ensign-Bickford Company Laser-ignitable ignition composition and initiator devices and assemblies comprising the same

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3238873A (en) * 1964-10-13 1966-03-08 Teledyne Inc Detonating fuse termination
US3320884A (en) * 1966-01-12 1967-05-23 James F Kowalick Pyrotechnic delay device for mild detonating cord

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4898095A (en) * 1986-10-20 1990-02-06 Nippon Oil And Fats Company, Limited And Kajima Corporation Laser beam-detonatable blasting cap
US4735145A (en) * 1987-03-02 1988-04-05 The United States Of America As Represented By The United States Department Of Energy High temperature detonator
EP0397572A1 (en) * 1989-05-12 1990-11-14 AEROSPATIALE Société Nationale Industrielle Photopyrotechnic priming device comprising a microlens crimped with a material having shape recollection power and a pyrotechnic line using such device
WO1999000343A1 (en) * 1997-06-30 1999-01-07 The Ensign-Bickford Company Laser-ignitable ignition composition and initiator devices and assemblies comprising the same

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2831659A1 (en) * 2001-10-26 2003-05-02 Saint Louis Inst LOW ENERGY OPTICAL DETONATOR
EP1306643A1 (en) * 2001-10-26 2003-05-02 I.S.L. Institut Franco-Allemand de Recherches de Saint-Louis Low energy optical detonator
US7051655B1 (en) 2001-10-26 2006-05-30 Institut Franco-Allemand De Recherches De Saint-Louis Low-energy optical detonator
EP2386819A1 (en) 2010-05-10 2011-11-16 Institut Franco-Allemand de Recherches de Saint-Louis Firing device for an initiator
DE202016008788U1 (en) 2016-10-27 2019-08-29 IBD Deisenroth Engineering GmbH An ignition material, in particular for use in an optical detonator and ignition means with such an ignition material

Also Published As

Publication number Publication date
US6374740B1 (en) 2002-04-23
FR2796142A1 (en) 2001-01-12
DE60006322T2 (en) 2004-05-13
DE60006322D1 (en) 2003-12-11
EP1067357B1 (en) 2003-11-05
FR2796142B1 (en) 2002-08-09

Similar Documents

Publication Publication Date Title
EP1067357B1 (en) Two stage flying-plate optic detonator
FR2481438A1 (en) CARTRIDGE FOR AIRPLANE SELF-PROTECTION BY RADAR INTERFERENCE
FR2671617A1 (en) HOLLOW CHARGE WITH DEVICE THAT DEVIATES DETONATION WAVES.
EP3102906B1 (en) Hollow charge and use for separating two floors of an aeronautical vehicle or for the neutralization thereof
FR2787149A1 (en) PYROTECHNIC UNLOCKING DEVICE
EP1742009A1 (en) Explosive composition for thermal ignition using a laser source and ignition device therefor
EP0467774A1 (en) Projectile with destructive effect, exploding on impact
EP1306643B1 (en) Low energy optical detonator
FR2561376A1 (en) Explosive device with fragmentation
FR2593905A1 (en) Destructible igniter for propellant charges
FR2622687A1 (en) PROPULSIVE LOADING FOR AMMUNITION COMPRISING AN EMPENNE PROJECTILE AND ITS IMPLEMENTATION METHOD
EP3344547A1 (en) Method for the linear separation and connection of two elements
FR2642158A1 (en) Process for preparing a delay assembly for a detonator and delay assembly
FR2522805A1 (en) Explosive, hollow charge with metal lining - designed to eliminate terminal compact core of jet charge during explosion
FR3063281A1 (en) METHOD AND DEVICE FOR LINKING AND LINEAR SEPARATING TWO GLUE ELEMENTS
FR2466743A1 (en) Smoke emitting grenade - fitted with separate fast and slow burning charges to give and maintain smoke screen
FR2559895A1 (en) Hand grenade
EP2554529B1 (en) Security detonator
FR2702273A1 (en) Pyrotechnic head with advanced means of dispersion.
EP0113270B1 (en) Explosive charge fuze arrangement creating a radial detonation wave
EP1371934B1 (en) Masking ammunition
FR2771496A1 (en) Sub calibre kinetic projectile for gun
FR2712686A1 (en) Propulsion/ignition unit, esp. for tear-gas grenade
FR2666646A1 (en) Incendiary body, especially shell, missile or bomb, comprising an incendiary case-shot charge
FR3113256A1 (en) Device for cutting a tubular structure

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

17P Request for examination filed

Effective date: 20010615

AKX Designation fees paid

Free format text: DE FR GB

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REF Corresponds to:

Ref document number: 60006322

Country of ref document: DE

Date of ref document: 20031211

Kind code of ref document: P

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20040123

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20040806

REG Reference to a national code

Ref country code: GB

Ref legal event code: 732E

REG Reference to a national code

Ref country code: FR

Ref legal event code: CL

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 17

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 18

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 60006322

Country of ref document: DE

Representative=s name: RAUSCH WANISCHECK-BERGMANN BRINKMANN PARTNERSC, DE

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 19

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20190730

Year of fee payment: 20

Ref country code: DE

Payment date: 20190730

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20190730

Year of fee payment: 20

REG Reference to a national code

Ref country code: DE

Ref legal event code: R071

Ref document number: 60006322

Country of ref document: DE

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

Expiry date: 20200704

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20200704