EP0497394A1 - Zündeinrichtung zum Zünden einer Sprengladung in einem Projektil - Google Patents
Zündeinrichtung zum Zünden einer Sprengladung in einem Projektil Download PDFInfo
- Publication number
- EP0497394A1 EP0497394A1 EP92200066A EP92200066A EP0497394A1 EP 0497394 A1 EP0497394 A1 EP 0497394A1 EP 92200066 A EP92200066 A EP 92200066A EP 92200066 A EP92200066 A EP 92200066A EP 0497394 A1 EP0497394 A1 EP 0497394A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- circuit
- projectile
- time delay
- ignition
- target
- 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 title claims description 22
- 238000005474 detonation Methods 0.000 claims abstract description 10
- 230000005764 inhibitory process Effects 0.000 claims abstract description 8
- 230000000977 initiatory effect Effects 0.000 claims description 11
- 230000003213 activating effect Effects 0.000 claims 1
- 239000000463 material Substances 0.000 claims 1
- 239000013078 crystal Substances 0.000 abstract description 4
- 239000008710 crystal-8 Substances 0.000 description 12
- 230000035939 shock Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012634 fragment Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
- F42C11/00—Electric fuzes
- F42C11/06—Electric fuzes with time delay by electric circuitry
-
- 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
- F42B12/04—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of armour-piercing type
- F42B12/10—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of armour-piercing type with shaped or hollow charge
- F42B12/16—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of armour-piercing type with shaped or hollow charge in combination with an additional projectile or charge, acting successively on the target
- F42B12/18—Hollow charges in tandem arrangement
Definitions
- the present invention relates to an ignition device to ignite an explosive charge in a projectile, such as a shell or a robot missile, in responsive to shockwaves appearing in the projectile as a result of the impact of the projectile in a target or as a result of a detonation of any supplementary explosive charge in the projectile.
- a piezo-electric generator is responsive to any shockwaves in the projectile to initiate an electric ignition circuit via an electric time delay circuit which is dimensioned to accomplish said initiation of the ignition circuit at a predetermined time delay after the generation of the shock-waves.
- the invention relates particularly, but not exclusively, to projectiles for attacking targets protected by reactive armour, said supplementary charge being a front shaped-charge, a so-called pre-penetrator to initiate the reactive armour in order to uncover the target, the first mentioned explosive charge being a rear shaped-charge, a so-called main charge, to penetrate the uncovered target.
- Reactive armour of the kind mentioned has been put into practice, and has been fitted to various tanks.
- the explosive shell In order to destroy reactive-armour tanks by means of shaped-charge effects, the explosive shell must have two shaped charges arranged in a tandem-relationship. The first shaped charge will penetrate and initiate the reactive armour structure in order to uncover the underlying main armour structure, whereas the second shaped charge will penetrate the uncovered main armour structure.
- a sensor device in the anti-tank explosive shell will indicate any presence of a target and will initiate the pre-penetrator which forms a shaped-charge jet which will penetrate and initiate the explosive substance of the reactive armour.
- the main armour of the tank Upon detonation of the reactive armour, the main armour of the tank will be uncovered.
- the sensor device of the anti-tank explosive shell which has indicated the presence of the target, activates the initiator device of the main charge which, after a certain time interval, usually between 0.4 and 3 thousandth parts of a second, will initiate the main charge, which will form a jet and penetrate the uncovered main armour of the armoured vehicle.
- the function of the reactive armour is based upon the principle that two or more steel plates are to be expelled by one or more interposed explosive charges.
- the plates are expelled - in the direction of the "normal" angle to the plates - with a velocity between 200 and 1500 m/sec.
- the reactive armour consists of panels having an area of 1-10 square-dm and are mounted on the outer surface of the armoured vehicle, substantially in one and the same surface area. The expelled plates may become more or less deformed or fragmentized.
- Known anti-tank explosive shells having two charges are provided with an initiation device for respective one of the charges.
- the initiation device of the main charge has usually an electric detonator, which receives electric current from a current source such a capacitor or a battery.
- a piezo-electric crystal may be used for sensing any shockwave generated as a result of an impact on the target or of any detonation of the pre-penetrator.
- the crystal may be located in or at the vicinity of the initiating device of the main charge and deliver electric energy to the electric detonator.
- the required time delay will be accomplished by an electric time delay circuit.
- An example of such an ignition system is shown in DE-A-641.181.
- Anti-tank explosive shells designed according to FR-A-2.310.547 have a serious drawback. In order to function properly, the trajectory of the anti-tank explosive shell must not coincide with the "normal" angle to the reactive panel. Otherwise, or if the velocity of the anti-tank explosive shell and the expelled plate is unfavourable, the expelled plate will collide with the main charge.
- the main charge In case of a collision, the main charge will be deformed and/or crushed before the end of the time delay interval and thus before initiation of the charge. Accordingly, the main charge will have no effect.
- the object of the invention is to provide a device of the kind mentioned by way of introduction, where any collision between the explosive charge (i.e. the main charge in the above-identified special embodiment) and any object which is expelled from the target (for instance a steel plate if the target is protected by reactive armour) will not prevent the action of the main charge.
- This object is achieved by providing the device in accordance with the invention with the characterizing features of claim 1.
- Fig. 1 is a central longitudinal section of an anti-tank explosive shell with two shaped charges in tandem relationship for action against targets protectd by reactive armour, the rear charge being provided with a device according to the invention.
- Fig. 2 shows an example of a target in the form of a modern tank.
- Figs. 3 and 4 show examples of initiation of reactive armour at the front portion of a tank of the kind shown in Fig. 2.
- Fig. 5 is an electric circuit diagram for a device according to the invention.
- the anti-tank explosive shell 1, see Fig. 1 has a sensor device in the form an elongated stand-off means 2 for sensing any impact in the target, a front shaped charge in the form of a pre-penetrator 3, and a rear shaped charge in the form of a main charge 4.
- This has an initiation device 5 with an electric detonator 6, which via an ignition circuit 7 (see Fig. 5) receives electric energy from a schematically shown piezo-electric generator in the form of a piezo-crystal 8, which receives mechanical energy from the shock-wave generated by the detonation of the pre-penetrator 3 as a result of an impact in the target by the stand-off means 2.
- an electric time delay circuit 9 see also Fig. 5, which is dimensioned to delay the detonation of the main charge 4 a predetermined time interval after the detonation of the pre-penetrator 3.
- the time delay circuit 9 is, according to the invention, provided with an inhibition circuit 10, see Fig. 5, capable of inhibiting the delay of the detonation of the main charge 4 and to instantaneously initiate the ignition circuit 7 when a second shock-wave is detected in the projectile by the piezo-crystal 8, for instance generated as a result of a collsion between the projectile and a plate or the like being expelled from the reactive armour of the target.
- an inhibition circuit 10 see Fig. 5
- the function is as follows, see Figs. 1-4:
- a target i.e. the tank 11 shown in Fig. 2, the front portion of which has reactive armour plates 12-17, as is shown schematically in Figs. 3 and 4, the sensor device 2 will initiate the pre-penetrator 3, which detonates and forms a penetrating jet which initiates the reactive armour, either in the upper portion (see Fig. 3) or in the lower portion (see Fig. 4) of the front portion of the tank, depending upon where the shell hits.
- the ignition circuit may in a known manner include an electric capacitor capable of being charged as a result of acceleration forces acting on the projectile 1 upon firing, and capable of being discharged in order to ignite the main charge 4 after a predetermined time delay, see below.
- the detonation of the pre-penetrator 3 generates a shock-wave which propagates rearwardly in the remaining portion of the anti-tank explosive shell 1, which portion substantially is the main charge 4.
- the shock-wave affects the piezo-crystal 8 which starts a time metering in the time delay circuit 9.
- the reactive armour will detonate during the time delay interval, and plates or plate fragments 14 will be expelled, see Fig. 3. Normally, these will pass by the main charge 4, which after the lapse of the time delay interval in the delay circuit 9 will be initiated and detonate, forming a jet which penetrates the target.
- the plates and plate fragments 13 of the reactive armour will collide with the main charge 4, see Fig. 4, with sufficient energy, a new shock-wave will be generated in the main charge 4 which propagates rearwardly and reaches the piezo-crystal 8.
- the inhibition circuit 10 will thereby direct the electric energy received by the piezo-crystal 8 directly to the electric detonator 6 without waiting for the time delay interval to lapse.
- the main charge 4 will then be initiated and form a jet which penetrates the target.
- time delay circuit 9 The structure and function of the time delay circuit 9 and the inhibition circuit 10 will be described below.
- the time delay circuit 9, see Fig. 5, consists of a voltage detector 18 capable of limiting the pulse amplitude at the output of the piezo-crystal 8 to a level adapted to a RS-flip-flop 19.
- the output of the detector 18 and of a reset circuit 20 is then connected to a respective input of the RS-flip-flop 19.
- the Q-output thereof and the output of a pulse oscillator 21 is connected to a respective input of an AND-circuit 22.
- the output of the AND-circuit 22 is connected to the CLK-input of an electronic pulse counter 23, whereas the Q ⁇ -output of the RS-flip-flop 19 is connected to the RST-input of the counter 23.
- the inhibition circuit 10, see Fig. 5, consists of an AND-circuit 24, one output of which is connected to the output of the detector 18, and the other output of which is connected to an output M of the counter 23.
- a second output N of the counter 23 and the output of the AND-circuit 24 is connected to a respective input of an OR-circuit 25, the output of which is connected to the input of the ignition circuit 7.
- the reset circuit 20 Upon powering of the circuits 9 and 10 by the oscillator 21, the reset circuit 20 will deliver a pulse to the RS-flip-flop 19. The Q ⁇ -output thereof will then assume a logical "1" level. Thus, the RST-input of the counter 23 is high, and the counter 23 blocked. No counter pulses can pass the gate 19, since one input thereof is a logical "O".
- a shock i.e. upon the impact by the sensor device 2 in a reactive armour plate 11
- a high powered pulse will be generated. The amplitude thereof will be limited by the detector 18 to a level which is adapted to the RS-flip-flop 19.
- the RS-flip-flop 19 changes to its other state, and the time metering begins.
- the AND-circuit 24 blocks any signal from the detector 18 so that no ignition pulse will be delivered immediately.
- the time interval 0 - T is given such a high value that every shockwave from the penetrator 3 having a certain amplitude, has come to a position of rest before the time T.
- the time interval T is, however, chosen so short that no collision can occur within the interval 0 - T between the main charge 4 and any plate or the like that is expelled from the reactive armour, but instead at a later time, i.e. within the time interval T - ⁇ .
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
- Emergency Protection Circuit Devices (AREA)
- Geophysics And Detection Of Objects (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9100297A SE9100297L (sv) | 1991-01-31 | 1991-01-31 | Taendsystem |
SE9100297 | 1991-01-31 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0497394A1 true EP0497394A1 (de) | 1992-08-05 |
EP0497394B1 EP0497394B1 (de) | 1995-02-22 |
Family
ID=20381768
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19920200066 Expired - Lifetime EP0497394B1 (de) | 1991-01-31 | 1992-01-13 | Zündeinrichtung zum Zünden einer Sprengladung in einem Projektil |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0497394B1 (de) |
DE (1) | DE69201447T2 (de) |
ES (1) | ES2068667T3 (de) |
SE (1) | SE9100297L (de) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0600388A1 (de) * | 1992-11-28 | 1994-06-08 | Dynamit Nobel Aktiengesellschaft | Tandemgefechtskopf mit piezoelektrischen Aufschlagzündern |
USH1930H1 (en) | 1998-07-15 | 2001-01-02 | The United States Of America As Represented By The Secretary Of The Navy | Precursor warhead attachment for an anti-armor rocket |
EP1116930A1 (de) * | 2000-01-17 | 2001-07-18 | Bofors Carl Gustaf AB | Zündeinrichtung zum Zünden eines Tandemgefechtskopfes |
EP1531316A1 (de) * | 2003-11-11 | 2005-05-18 | RUAG Munition | Struktur eines Geschosses |
US7273011B2 (en) | 2004-11-03 | 2007-09-25 | Saab Bofors Dynamics Switzerland Ltd | Structure of a projectile |
CN113030425A (zh) * | 2021-02-01 | 2021-06-25 | 中北大学 | 一种等效模拟弹体侵彻钢靶的炸药安定性评估实验装置 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2310547A1 (fr) * | 1975-05-06 | 1976-12-03 | Realisa Et Applic Tech Et | Perfectionnements aux charges creuses |
GB2060837A (en) * | 1979-10-04 | 1981-05-07 | Diehl Gmbh & Co | Electrical projectile-fuse |
EP0238715A1 (de) * | 1986-02-21 | 1987-09-30 | Messerschmitt-Bölkow-Blohm Gesellschaft mit beschränkter Haftung | Gefechtskopf |
DE3346406A1 (de) * | 1983-12-22 | 1989-06-29 | Messerschmitt Boelkow Blohm | Verfahren zur bekaempfung von flugzeugen in sheltern |
-
1991
- 1991-01-31 SE SE9100297A patent/SE9100297L/ not_active Application Discontinuation
-
1992
- 1992-01-13 DE DE1992601447 patent/DE69201447T2/de not_active Expired - Fee Related
- 1992-01-13 EP EP19920200066 patent/EP0497394B1/de not_active Expired - Lifetime
- 1992-01-13 ES ES92200066T patent/ES2068667T3/es not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2310547A1 (fr) * | 1975-05-06 | 1976-12-03 | Realisa Et Applic Tech Et | Perfectionnements aux charges creuses |
GB2060837A (en) * | 1979-10-04 | 1981-05-07 | Diehl Gmbh & Co | Electrical projectile-fuse |
DE3346406A1 (de) * | 1983-12-22 | 1989-06-29 | Messerschmitt Boelkow Blohm | Verfahren zur bekaempfung von flugzeugen in sheltern |
EP0238715A1 (de) * | 1986-02-21 | 1987-09-30 | Messerschmitt-Bölkow-Blohm Gesellschaft mit beschränkter Haftung | Gefechtskopf |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0600388A1 (de) * | 1992-11-28 | 1994-06-08 | Dynamit Nobel Aktiengesellschaft | Tandemgefechtskopf mit piezoelektrischen Aufschlagzündern |
US5415105A (en) * | 1992-11-28 | 1995-05-16 | Dynamit Nobel Aktiengesellschaft | Tandem warhead with piezoelectric percussion fuses |
USH1930H1 (en) | 1998-07-15 | 2001-01-02 | The United States Of America As Represented By The Secretary Of The Navy | Precursor warhead attachment for an anti-armor rocket |
EP1116930A1 (de) * | 2000-01-17 | 2001-07-18 | Bofors Carl Gustaf AB | Zündeinrichtung zum Zünden eines Tandemgefechtskopfes |
EP1531316A1 (de) * | 2003-11-11 | 2005-05-18 | RUAG Munition | Struktur eines Geschosses |
WO2005045357A1 (de) * | 2003-11-11 | 2005-05-19 | Ruag Land Systems, Warhead Division | Struktur eines geschosses |
US7273011B2 (en) | 2004-11-03 | 2007-09-25 | Saab Bofors Dynamics Switzerland Ltd | Structure of a projectile |
CN113030425A (zh) * | 2021-02-01 | 2021-06-25 | 中北大学 | 一种等效模拟弹体侵彻钢靶的炸药安定性评估实验装置 |
CN113030425B (zh) * | 2021-02-01 | 2023-01-03 | 中北大学 | 一种等效模拟弹体侵彻钢靶的炸药安定性评估实验装置 |
Also Published As
Publication number | Publication date |
---|---|
EP0497394B1 (de) | 1995-02-22 |
ES2068667T3 (es) | 1995-04-16 |
DE69201447D1 (de) | 1995-03-30 |
SE9100297D0 (sv) | 1991-01-31 |
DE69201447T2 (de) | 1995-07-20 |
SE9100297L (sv) | 1992-08-01 |
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