EP2359088A1 - Charge pyrotechnique a faible vulnerabilite - Google Patents
Charge pyrotechnique a faible vulnerabiliteInfo
- Publication number
- EP2359088A1 EP2359088A1 EP09771550A EP09771550A EP2359088A1 EP 2359088 A1 EP2359088 A1 EP 2359088A1 EP 09771550 A EP09771550 A EP 09771550A EP 09771550 A EP09771550 A EP 09771550A EP 2359088 A1 EP2359088 A1 EP 2359088A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lines
- initiation
- points
- partial
- priming
- 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
Links
- 239000002360 explosive Substances 0.000 claims abstract description 56
- 230000037452 priming Effects 0.000 claims abstract description 46
- 230000001360 synchronised effect Effects 0.000 claims abstract description 25
- 230000000977 initiatory effect Effects 0.000 claims description 67
- 238000005474 detonation Methods 0.000 claims description 22
- 230000004913 activation Effects 0.000 claims description 9
- 230000035945 sensitivity Effects 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 2
- 239000012634 fragment Substances 0.000 abstract description 3
- 230000016571 aggressive behavior Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 238000010304 firing Methods 0.000 description 5
- 206010001488 Aggression Diseases 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 235000015842 Hesperis Nutrition 0.000 description 1
- 235000012633 Iberis amara Nutrition 0.000 description 1
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 1
- 229920005372 Plexiglas® Polymers 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
- F42C19/00—Details of fuzes
- F42C19/08—Primers; Detonators
- F42C19/095—Arrangements of a multiplicity of primers or detonators, dispersed around a warhead, one of the primers or detonators being selected for directional detonation effects
Definitions
- the invention relates to pyrotechnic charges, in particular those used in the military field with sheaves of oriented flakes.
- Military warheads such as missiles, rockets, etc. include pyrotechnic charges to destroy or damage a nearby target. Activation of the charge is controlled by electronic devices embedded in the military head detecting the presence and position of the target to be destroyed.
- FIG. 1 represents a conventional configuration of a pyrotechnic charge that is not vulnerable to external aggressions.
- the pyrotechnic charge comprises a fragment-generating envelope 10 containing an explosive 12 having in its central part a sensitive pyrotechnic portion 14, or detonator, which during its activation, for example by sending an electrical pulse by a computing unit (not shown in the figure) determining the presence of a target C, initiates the detonation of the explosive.
- the firing of the explosive explodes the envelope 10 producing sheaves of splinters on a solid angle of 360 °.
- FIG. 1 shows another embodiment of a pyrotechnic charge of the state of the art with a better destruction efficiency of a target.
- a chip generator 20 is placed in the center of an explosive charge 22 and multiple detonators 24 are distributed on the periphery of said explosive charge.
- a presence detection system of the target triggers a single detonator 24 on the side of the load 22 opposite the target C which propels all the chips of the chip generator 20 in the only direction of the target (set of arrows in Figure 2).
- the advantage of this configuration of pyrotechnic charge with selection of the detonator lies in its effectiveness in the destruction of the target but has the disadvantage of a high vulnerability against external aggression. Indeed the probability that a flash or any other projectile reaches one of the external detonators 22, 24 at the periphery of the load is quite high.
- the explosive main charge is initiated over a large area of the periphery of the pyrotechnic charge and in a synchronized manner, instead of a punctual priming such as as shown in Figure 2.
- the pyrotechnic charges of the state of the art comprise multiple initiation networks constituted by a distribution of multiple points of initiation from detonation distribution nodes.
- FIG. 3 shows an embodiment of a pyrotechnic charge according to the priming technique at the periphery of the explosive charge by a network with multiple initiation points.
- a chip generator 30 is placed in the center of an explosive charge 32.
- the surface of the charge is divided into n sectors S1, S2,. starting network R1, R2, ... Ri ... Rn, each of the networks comprising a respective detonator Dt1, Dt2, ... Dtn for its activation. All the detonators of the ignition networks covering the peripheral surface of the load are deported in a single intelligent safety and firing device (DSMF) (not shown in the figure).
- DSMF intelligent safety and firing device
- the presence of the target C triggers the detonator and the ignition network of the sector of the charge situated opposite the target C, propelling a maximum sheaf of sparks towards target.
- the sheaf of shrapnel thus directed towards the target is even more efficient thanks to the priming plan of the network.
- FIG. 4 shows a partial view of an exemplary embodiment of the pyrotechnic charge of FIG. 3, of cylindrical shape by a network with multiple initiation points.
- the pyrotechnic charge of FIG. 4 comprises a casing 40, for example in plexiglass, of cylindrical shape surrounding an explosive charge 42 in the form of a bar.
- a synchronous ignition network Ri of a sector Si of the surface of the explosive charge, produced in the cylindrical casing 40 by an even distribution of vias 44 perpendicular to the surface of the charge and grooves 46 parallel to said surface comprising a detonation product intended to be initiated by a detonator (not shown in the figure) remote from the priming surface.
- the sleepers 44 form the multiple points of initiation on the surface of the explosive which are connected by priming lines materialized by the grooves 46 containing the detonation product.
- the detonation product in the grooves transmits a detonation wave initiated by the detonator remotely, in the manner of a wick, to all of the ignition points distributed over the sector considered of the envelope of the pyrotechnic charge.
- a network must be realized respecting certain constraints. For example, the spacing between the different lines of the network comprising the detonation product must be such that these lines do not interfere with each other.
- the number and position of the bootstrap outputs at the bushings are defined to generate an initiation of detonation of the explosive charge in such a manner that totally synchronous over the whole of the considered surface of the pyrotechnic charge.
- Figure 5 shows a state-of-the-art synchronous booster multi-point network.
- the network of FIG. 5 comprises 64 priming points Pa distributed at a regular pitch Ps on the surface of a sector Si of a pyrotechnic charge forming a square of 8 by 8 synchronous initiation points.
- These different priming points pa are connected, from a central distribution point Ps of the network, by detonation lines Cd so as to cause a synchronous activation of all the initiation points.
- the distances traveled by the detonation wave between this central point Ps and the initiation points, along the detonation lines, are identical, which ensures a synchronous detonation of the initiation points activating the entire surface of the sector of interest. the explosive charge.
- this pyrotechnic charge configuration shown in FIGS. 4 and 5 is too vulnerable to the surrounding aggressions.
- an impact on the surface of the pyrotechnic charge can accidentally initiate an element of the network (point or line) and generate an internal propagation propagation detonation, ascending and descending with the risk of partially obtaining a sufficient synchronous output effect to prime the main explosive charge in a quasi-nominal manner.
- the invention proposes a pyrotechnic charge comprising a chip generator and an explosive having an outer surface divided into n sectors each sector having kq multiple initiation points of the explosive, where k and q are integers greater than 1, characterized in that the multiple initiation points of the explosive are connected by priming lines forming, by sector, at least two partial networks nested with each other. synchronously initiating the multiple initiation points, each of the synchronous initiation partial networks being connected to a respective partial network detonator.
- each sector of the external surface of the explosive comprises two interleaved partial networks of synchronous initiation.
- the kq multiple initiation points are half by part kq / 2 of each of the two nested partial networks, each of the two halves of the multiple initiation points being distributed over the the explosive of the sector considered.
- the kq multiple initiation points of each of the sectors are distributed on the surface of the explosive on lines L1, L2, Lx, Lk and q columns C1, C2,. ... Cq, where x is the rank of the line Lx and y is the rank of the column Cy, and in one step Pp of distribution, a partial synchronous priming network of one sector being obtained from the other network synchronous ignition of the same sector by rotating 180 ° around an axis YY 'parallel to the direction of the columns and passing through a respective central point of distribution of the initiation lines of each of the partial networks.
- a partial network comprises the priming point p1 1, of the line L1 and the column C1, connected by a basic priming line to the starting point p22, of the column C2 and the line L2, to form an elementary grounding pattern of the partial network, this elementary grounding pattern of the partial network being repeated every other starting point along lines L1 to Lk and along columns C1 to Cq, and in that the other partial network comprises the initiation point p12, of the line L1 and the column C2, connected by another elementary line of initiation to the point of initiation p21, of the line L2 and the column C1, to form another elementary grounding pattern of the other partial network, this other elementary grounding pattern of the other partial network being repeated every other starting point along the lines L1 to Lk and along the columns C1 to Cq.
- the centers of the respective basic priming lines are connected by other initiation lines configured so that the distances traveled by the detonation detonation waves of the sector in question, applied to each respective central point of distribution of the detectors.
- networks, to the sector's multiple ignition points are identical producing a synchronous activation of all said multiple priming points of the two partial networks.
- the kq multiple initiation points are distributed on a square surface of perpendicular axes XX 'parallel to the lines L1, L2, ... Lk and YY' parallel to the columns C1, C2, ... Cq of partial networks and passing through the central point of distribution.
- the other boot lines are:
- the chip generator is at the periphery of the charge surrounding the explosive having an envelope on its outer surface having the multiple nested networks.
- the chip generator is within the charge having an envelope on its outer surface having multiple nested arrays.
- a main objective of the invention is to make the pyrotechnic charges of the warheads much less vulnerable to the effects of external impacts.
- Another objective is to provide distribution networks initiation points (or initiation) of an explosive charge decreasing the probability of inadvertent or accidental ignition of the explosive charge.
- FIG. 3 already described, shows an embodiment of a pyrotechnic charge of the state of the art according to the priming technique at the periphery of the explosive charge by a network with multiple initiation points;
- FIG. 4 already described, shows a partial view of an exemplary embodiment of the pyrotechnic charge of FIG. 3;
- FIG. 5 already described, shows a multi-point synchronous boot network of the state of the art
- FIG. 6 shows a pyrotechnic charge with sheaf sprays oriented according to the invention
- FIG. 7a shows one of the partial lattices of a sector Si of rank i of a pyrotechnic charge according to the invention
- FIG. 7b shows two nested partial networks of sector Si of rank i of a pyrotechnic charge according to the invention.
- FIG. 6 shows a pyrotechnic charge with sheaf sprays oriented according to the invention.
- the pyrotechnic charge of FIG. 6 comprises a chip generator 50 placed at the center of an explosive (or explosive) charge 52.
- the surface of the explosive charge is divided into sectors S1, S2, .. Si ,, ... Sn each comprising and, according to a main feature of the invention, nested interleaved partial networks.
- each of the sectors comprises two partial networks Ra1, Rb1, for the sector S1, Ra2, Rb2, for the sector S2, Rai, Rbi for the sector Si of rank i and so on until the last sector Sn comprising the networks Ran, and
- Each of the two nested partial networks of the pyrotechnic charge comprises a respective detonator remote from the surface of the explosive for its activation, Dta1 for the network Ra1, Dtb1 for the other network Rb1 of the sector S1, Dta2 for the network Ra2, Dtb2 for the other network Rb2 of the sector S2, and so on until the last two detonators Dtan for the network Ran, Dtbn for the other network Rbn of the sector Sn.
- All the detonators of the ignition networks covering the surface of the periphery of the explosive are deported in a single security device and firing (of intelligent symbol DSMF) (not shown in the figure).
- Each of the n sectors S1, S2, ..Si, ... Sn has kq multiple initiation points p1 1, p12, ... pxy, ... pkq in contact with said external surface of the explosive to initiate the ignition. explosive, where k and q are integers greater than 1, x and y respectively defining the position of the point pxy in the line Lx and the column Cy.
- the kp multiple ignition points of the surface of the explosive are connected by priming lines forming, in each of sectors S1, S2, ..Si, ... Sn, nested partial networks.
- Figure 7a shows one of the partial lattices of a sector
- Figure 7b shows the two nested partial networks of the sector
- the priming points pxy are marked on the square by their rank x of line (L1 to Lq) and their row y of column (C1 to Ck).
- the set of kq priming points are distributed on a square surface of perpendicular axes XX 'parallel to the lines of the networks and YY' parallel to the columns of the networks and passing through a respective central distribution point Pca, Pcb of priming each of the partial networks Ra, Rb.
- the set of kq priming points are connected by initiation lines to form two nested partial networks, a partial network Ra and another nested network Rb.
- the partial network Ra (see FIG. 7a) comprises the priming point p1 1, of the line L1 and the column C1, connected by a basic priming line Cda to the initiation point p22 of the column C2 and the line L2. to form an elementary priming pattern Ma of the partial grating Ra, this elementary priming pattern of the partial grating Ra being repeated every other initiation point along lines L1 to Lk and along columns C1 to Cq.
- the other partial network Rb (in dashed lines in FIG. 7b) comprises the initiation point p12, of the line L1 and the column C2, connected by another elementary initiation line Cdb to the initiation point p21, of the line L2 and column C1, to form another elementary grounding pattern Mb of the other partial network Rb, this other basic grounding pattern of the other partial network Rb is repeated one out of two starting point along lines L1 to Lk and along the columns C1 to Cq.
- Cda, Cdb are perpendicular to each other and make an angle of 45 ° with respect to the axis YY 'or XX'.
- the centers Cta, Ctb of the respective elementary lines Cda, Cdb of initiation are connected by other lines of initiation. These other initiation lines are configured so that the distances traveled by a detonation wave applied by a respective detonator Dtai, Dtbi, of the sector Si considered, to a respective central distribution point Pca and Pcb of the two networks Ra, Rb of said sector. If, up to the multiple trigger points of the Si sector of the pyrotechnic charge are identical producing a synchronous activation of all said multiple initiation points of the two networks Ra, Rb.
- Figure 7b shows two nested partial networks, the full-line network Ra and the dotted Rb network with the other boot lines.
- the other boot lines are: 1) for the Ra network:
- first Iga1 lines connecting the Cta centers of two consecutive Cda elementary lines parallel to the axis XX ', second Iga2 lines parallel to the YY axis connecting the centers of the first Iga1 lines,
- third lines Iga3 parallel to the axis XX 'connecting the centers of two consecutive second lines along the axis XX'; two last lines Iga4 parallel to the axis YY 'connecting the centers of the two third lines Iga3 to the central point Pca of the partial network Ra.
- third lines Igb3 parallel to the axis XX 'connecting the centers of two consecutive second lines along the axis XX'; two last lines Igb4 parallel to the axis YY 'connecting the centers of the two third lines Igb3 to the central point Pcb of the partial network Rb.
- the initiation lines of each of the interleaved partial networks are made by passages of the lines and starting points of the networks in an envelope of the explosive charge having good characteristics of detonation isolation.
- the explosive charge is surrounded by an envelope comprising the multiple nested networks.
- the envelope can be plastic.
- the envelope may comprise two circular tube-shaped layers nested one inside the other, each of the tubes comprising the lines and the points of initiation of a respective partial network Rai, Rbi.
- the passages of the lines and crosses of the priming points can be made in a single envelope by molding.
- the designer of the pyrotechnic charge according to the invention will determine the pitch Pp between the kq multiple points of initiation depending the sensitivity of the explosive and so that the accidental initiation of a partial network Ra or Rb does not produce the nominal ignition of the pyrotechnic charge.
- the chip generator is inside the explosive.
- the chip generator may be disposed outside the explosive.
- the fragment generator is in these other embodiments, for example, in the form of a casing surrounding the explosive, said explosive having, in direct contact with its outer surface, the interleaved partial networks synchronous ignition.
- a main advantage of the pyrotechnic charge according to the invention is that it retains the priming principle by distribution network of the points of initiation (or initiation) while remaining much less vulnerable to the effects of external impact.
- the unwanted or accidental operation of a partial network is incapable of producing a nominal priming of the explosive charge, either because the number of trigger points activated is insufficient in number for the priming effect, or because the points accidentally activated primers are sufficiently desynchronised to avoid the priming effect.
- the partial networks described are not limiting and other partial networks can be envisaged to reduce the vulnerability of the pyrotechnic charges for the warheads with sheaves of directed flakes.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
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Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0807002A FR2939881B1 (fr) | 2008-12-12 | 2008-12-12 | Charge pyrotechnique a faible vulnerabilite |
PCT/EP2009/066655 WO2010066752A1 (fr) | 2008-12-12 | 2009-12-08 | Charge pyrotechnique a faible vulnerabilite |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2359088A1 true EP2359088A1 (fr) | 2011-08-24 |
EP2359088B1 EP2359088B1 (fr) | 2017-03-08 |
Family
ID=40910785
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09771550.2A Not-in-force EP2359088B1 (fr) | 2008-12-12 | 2009-12-08 | Charge pyrotechnique a faible vulnerabilite |
Country Status (6)
Country | Link |
---|---|
US (1) | US8479653B2 (fr) |
EP (1) | EP2359088B1 (fr) |
AU (1) | AU2009326087B2 (fr) |
FR (1) | FR2939881B1 (fr) |
IL (1) | IL213453A (fr) |
WO (1) | WO2010066752A1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108694281A (zh) * | 2018-05-14 | 2018-10-23 | 西安工业大学 | 一种基于多维角度破片散布侵彻的目标毁伤概率计算方法 |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10254090B1 (en) | 2013-03-14 | 2019-04-09 | University Of Central Florida Research Foundation | Layered energetic material having multiple ignition points |
US9464874B1 (en) * | 2013-03-14 | 2016-10-11 | Spectre Materials Sciences, Inc. | Layered energetic material having multiple ignition points |
FR3028852B1 (fr) | 2014-11-21 | 2017-01-06 | Herakles | Produits explosifs composites de faible epaisseur et leur preparation |
WO2020102915A1 (fr) * | 2018-11-20 | 2020-05-28 | Saab Bofors Dynamics Switzerland Ltd | Ogive à déclenchement asymétrique |
US11112222B2 (en) | 2019-01-21 | 2021-09-07 | Spectre Materials Sciences, Inc. | Propellant with pattern-controlled burn rate |
JP2024502509A (ja) | 2021-02-16 | 2024-01-19 | スペクトル マテリアルズ サイエンシズ,インコーポレイテッド | 銃器及びその他の軍需品用プライマー |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3430563A (en) * | 1963-08-07 | 1969-03-04 | Us Navy | Flexible detonation wave shaping device |
US3949674A (en) * | 1965-10-22 | 1976-04-13 | The United States Of America As Represented By The Secretary Of The Navy | Operation of fragment core warhead |
US3896731A (en) * | 1970-09-22 | 1975-07-29 | Us Navy | Explosive initiator device |
FR2388468A7 (fr) * | 1975-01-30 | 1978-11-17 | France Etat | Projectile explosif, notamment de defense anti-aerienne |
US4145972A (en) * | 1976-12-17 | 1979-03-27 | The United States Of America As Represented By The Secretary Of The Navy | Dual-mode warhead initiation system |
US6427599B1 (en) * | 1997-08-29 | 2002-08-06 | Bae Systems Integrated Defense Solutions Inc. | Pyrotechnic compositions and uses therefore |
FR2896577B1 (fr) * | 2006-01-24 | 2010-08-20 | Giat Ind Sa | Dispositif d'amorcage pour charge multi modes |
-
2008
- 2008-12-12 FR FR0807002A patent/FR2939881B1/fr not_active Expired - Fee Related
-
2009
- 2009-12-08 WO PCT/EP2009/066655 patent/WO2010066752A1/fr active Application Filing
- 2009-12-08 AU AU2009326087A patent/AU2009326087B2/en not_active Ceased
- 2009-12-08 EP EP09771550.2A patent/EP2359088B1/fr not_active Not-in-force
- 2009-12-08 US US13/139,304 patent/US8479653B2/en active Active
-
2011
- 2011-06-09 IL IL213453A patent/IL213453A/en active IP Right Grant
Non-Patent Citations (1)
Title |
---|
See references of WO2010066752A1 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108694281A (zh) * | 2018-05-14 | 2018-10-23 | 西安工业大学 | 一种基于多维角度破片散布侵彻的目标毁伤概率计算方法 |
CN108694281B (zh) * | 2018-05-14 | 2022-09-16 | 西安工业大学 | 一种基于多维角度破片散布侵彻的目标毁伤概率计算方法 |
Also Published As
Publication number | Publication date |
---|---|
AU2009326087B2 (en) | 2015-04-02 |
US20110308416A1 (en) | 2011-12-22 |
FR2939881B1 (fr) | 2011-02-11 |
AU2009326087A1 (en) | 2011-08-04 |
IL213453A0 (en) | 2011-07-31 |
FR2939881A1 (fr) | 2010-06-18 |
EP2359088B1 (fr) | 2017-03-08 |
WO2010066752A1 (fr) | 2010-06-17 |
US8479653B2 (en) | 2013-07-09 |
IL213453A (en) | 2013-09-30 |
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