EP1878995A2 - Aufschlagzünder mit piezoelektrischem Generator - Google Patents

Aufschlagzünder mit piezoelektrischem Generator Download PDF

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Publication number
EP1878995A2
EP1878995A2 EP07290832A EP07290832A EP1878995A2 EP 1878995 A2 EP1878995 A2 EP 1878995A2 EP 07290832 A EP07290832 A EP 07290832A EP 07290832 A EP07290832 A EP 07290832A EP 1878995 A2 EP1878995 A2 EP 1878995A2
Authority
EP
European Patent Office
Prior art keywords
impact
piston
rocket
cap
generator
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
EP07290832A
Other languages
English (en)
French (fr)
Other versions
EP1878995B1 (de
EP1878995A3 (de
Inventor
Stéphane Cotet
Laurent Desgland
Nicolas Eches
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.)
KNDS Ammo France SA
Original Assignee
Nexter Munitions SA
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 Nexter Munitions SA filed Critical Nexter Munitions SA
Priority to PL07290832T priority Critical patent/PL1878995T3/pl
Publication of EP1878995A2 publication Critical patent/EP1878995A2/de
Publication of EP1878995A3 publication Critical patent/EP1878995A3/de
Application granted granted Critical
Publication of EP1878995B1 publication Critical patent/EP1878995B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C11/00—Electric fuzes
    • F42C11/02—Electric fuzes with piezo-crystal
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C1/00—Impact fuzes, i.e. fuzes actuated only by ammunition impact
    • F42C1/10—Impact fuzes, i.e. fuzes actuated only by ammunition impact without firing-pin

Definitions

  • the technical field of the invention is that of impact rockets for projectiles.
  • Piezoelectric generators are most often constituted by one or more piezoelectric ceramics stacked on top of one another. Such a generator is placed on a support integral with the rocket body and which forms an anvil during impact.
  • the rocket further comprises a piston which comes to exert a mechanical stress on the generator during the shock.
  • the patent FR-1595412 describes such a known impact rocket. The resulting voltage is used to initiate an electrical primer.
  • One of the problems encountered with known rockets is that, in certain impact configurations, the electrical voltage generated may be insufficient to ensure initiation of the primer.
  • the patent FR-2669416 discloses a priming device which comprises a piezoelectric generator integral with the rocket body and which is actuated by a hammer during the impact on a target. Thus the hammer is projected towards the piezoelectric generator during a shock on the cap of the rocket. With such a concept the shock received by the generator is also too short.
  • the patent WO-85/03345 also described a percussion fuse including a piezoelectric generator and means for increasing the safety of use. This last means associates a coil of self induction and a spark gap. Thus, firing is only initiated when the rising edge of the received pulse exceeds a given amplitude.
  • the subject of the invention is an impact rocket comprising a body enclosing a piezoelectric generator placed on a support integral with the body and forming an anvil, a rocket comprising a piston intended to exert a mechanical stress on the generator, a piston which receives the impact force transmitted by a cap, rocket characterized in that the piston is slidably mounted relative to the body and in that it comprises a plastically deformable means which is interposed between the cap and the body, which means is deformed by the displacement of the cap during the impact on a target, this displacement causing the displacement of the piston, the energy consumed by the deformation of the means thus making it possible to ensure a longer and more progressive crushing of the piezoelectric generator during the impact on a target.
  • the plastically deformable means may be constituted by a metal washer having at least one deformable crown.
  • the metal washer may comprise at least two crowns separated by a groove.
  • the washer may be made of aluminum or aluminum alloy.
  • Figure 1 shows a rocket 1 ogive for a projectile.
  • This rocket is intended to be put in place at a front end of a projectile (not shown), for example an artillery or tank shell or a mortar projectile.
  • the rocket 1 comprises a body 2 which has a threaded rear portion 2a which is screwed to the projectile and a front portion 2b ogivée.
  • the rear part 2a encloses an electronic circuit 3 which is connected, on one side to a piezoelectric generator 4, and on the other to a primer 5.
  • the piezoelectric generator 4 is placed in a housing 6 arranged at one end of the rear portion 2a of the body 2.
  • the rear portion 2a of the body 2 thus constitutes an anvil support.
  • the rocket 1 comprises a piston 7 which is slidably mounted in an axial bore 8 of the front portion 2b of the body 2.
  • the piston 7 is intended to come to exert a mechanical stress on the generator 4 and therefore has a face which bears against this generator.
  • the piston 7 is secured (for example by screwing) a cap 9 which extends the front portion 2b of the rocket body. During an impact on a target, the cap 9 transmits a force to the piston 7 which in turn communicates to the piezoelectric generator 4.
  • the piston is also partially immobilized in translation by a split elastic ring 13 which is arranged in a peripheral groove of the piston. This ring 13 prevents any extraction of the piston 7 out of his home. It does not, however, prevent the piston 7 from moving towards the generator 4.
  • the ring 13 could be replaced by a shoulder fitted on the piston 7.
  • the rocket comprises a plastically deformable means which is interposed between the cap 9 and the body 2.
  • This means is constituted by a metal washer 10 (made of aluminum or aluminum alloy) and which comprises at least one deformable crown 11. As is more particularly visible in Figure 2 the rings 11 are separated by circular grooves 12.
  • the material of the washer is chosen so as to be plastically deformable during a shock on a target. This means that the deformation of the washer is irreversible.
  • crowns 11 number and thickness
  • rigidity of the washer 10 ensures the immobilization of the piston 7 during the storage phases or during falls.
  • the crowns 11 are dimensioned so as to crash only during the impact on a target subsequent to an effective firing of the projectile.
  • the energy consumed by the deformation of the washer 10 makes it possible to ensure a longer and more progressive crushing of the piezoelectric generator 4. This results in a higher electrical voltage and a greater reliability of the initiation.
  • annular piston 7 associated with a piezoelectric generator also annular
  • annular to allow for example the establishment of a means of programming the operating mode at the axis of the rocket.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Toys (AREA)
  • Materials For Medical Uses (AREA)
  • Fuses (AREA)
  • General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Actuator (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
  • Reverberation, Karaoke And Other Acoustics (AREA)
EP07290832A 2006-07-13 2007-07-02 Aufschlagzünder mit piezoelektrischem Generator Active EP1878995B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL07290832T PL1878995T3 (pl) 2006-07-13 2007-07-02 Zapalnik uderzeniowy z generatorem piezoelektrycznym

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0606449A FR2903772B1 (fr) 2006-07-13 2006-07-13 Fusee d'impact a generateur piezoelectrique.

Publications (3)

Publication Number Publication Date
EP1878995A2 true EP1878995A2 (de) 2008-01-16
EP1878995A3 EP1878995A3 (de) 2008-08-27
EP1878995B1 EP1878995B1 (de) 2011-02-16

Family

ID=37734825

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07290832A Active EP1878995B1 (de) 2006-07-13 2007-07-02 Aufschlagzünder mit piezoelektrischem Generator

Country Status (8)

Country Link
US (1) US7661363B2 (de)
EP (1) EP1878995B1 (de)
AT (1) ATE498817T1 (de)
DE (1) DE602007012487D1 (de)
ES (1) ES2361441T3 (de)
FR (1) FR2903772B1 (de)
NO (1) NO336875B1 (de)
PL (1) PL1878995T3 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10502537B1 (en) * 2017-10-20 2019-12-10 The United States Of America As Represented By The Secretary Of The Army Enhanced terminal performance medium caliber multipurpose traced self-destruct projectile
RU205478U1 (ru) * 2021-03-09 2021-07-15 Акционерное общество "Научно-производственное объединение "Курганприбор" Пьезогенератор взрывателя

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1595412A (de) 1968-12-19 1970-06-08
WO1985003345A1 (fr) 1984-01-25 1985-08-01 Mefina S.A. Fusee electrique de projectile a percussion
FR2669416A1 (fr) 1980-11-21 1992-05-22 France Etat Armement Dispositif piezoelectrique pour l'amorcage d'un detonateur.

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2827851A (en) * 1954-08-13 1958-03-25 Peter B Ferrara Energizer assembly
US2900906A (en) * 1955-06-30 1959-08-25 Charles R Olsen Self-destruction device
US3324317A (en) * 1965-01-21 1967-06-06 Magnavox Co Solid state inertial energy generatorstorage system
DE2058968A1 (de) * 1970-12-01 1972-06-15 Dynamit Nobel Ag Piezoelektrische Energiequelle
CH537000A (de) * 1971-02-16 1973-05-15 Oerlikon Buehrle Ag Aufschlagzünder für Geschosse
DE2232051A1 (de) * 1972-06-30 1974-01-03 Rheinmetall Gmbh Elektrische zuendeinrichtung mit einem keramik- oder quarzelement als elektrische energiequelle fuer geschosse oder raketen, insbesondere fuer kleinkalibrige geschosse
GB1431600A (en) * 1973-10-31 1976-04-07 Ici Ltd Method of blasting and a detenator firing device therefor
DE2457946C2 (de) * 1974-12-07 1982-12-02 Rheinmetall GmbH, 4000 Düsseldorf Zündsystem für Geschosse
US4434717A (en) * 1981-08-21 1984-03-06 The United States Of America As Represented By The Secretary Of The Navy Hybrid fuse triggering device
DE3414841A1 (de) * 1984-04-19 1985-10-24 Diehl GmbH & Co, 8500 Nürnberg Zuenderausloeseeinrichtung
US5033382A (en) * 1987-03-25 1991-07-23 Magnavox Government And Industrial Electronics Company Piezoelectric fuse for projectile with safe and arm mechanism
US5040463A (en) * 1989-09-28 1991-08-20 Alliant Techsystems Inc. Pressure activated power supply
US5536990A (en) * 1991-03-27 1996-07-16 Thiokol Corporation Piezoelectric igniter
US7117796B1 (en) * 2005-12-29 2006-10-10 The United States Of America As Represented By The Secretary Of The Navy Igniter for exothermic torch rod

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1595412A (de) 1968-12-19 1970-06-08
FR2669416A1 (fr) 1980-11-21 1992-05-22 France Etat Armement Dispositif piezoelectrique pour l'amorcage d'un detonateur.
WO1985003345A1 (fr) 1984-01-25 1985-08-01 Mefina S.A. Fusee electrique de projectile a percussion

Also Published As

Publication number Publication date
NO336875B1 (no) 2015-11-23
EP1878995B1 (de) 2011-02-16
US7661363B2 (en) 2010-02-16
ATE498817T1 (de) 2011-03-15
US20080011178A1 (en) 2008-01-17
NO20073609L (no) 2008-01-14
PL1878995T3 (pl) 2011-07-29
EP1878995A3 (de) 2008-08-27
DE602007012487D1 (de) 2011-03-31
FR2903772A1 (fr) 2008-01-18
ES2361441T3 (es) 2011-06-17
FR2903772B1 (fr) 2010-10-22

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