EP2752637A2 - Sécurité d'une fusée d'un projectile sous-calibre et procédé d'armement de cette fusée - Google Patents

Sécurité d'une fusée d'un projectile sous-calibre et procédé d'armement de cette fusée Download PDF

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Publication number
EP2752637A2
EP2752637A2 EP13006033.8A EP13006033A EP2752637A2 EP 2752637 A2 EP2752637 A2 EP 2752637A2 EP 13006033 A EP13006033 A EP 13006033A EP 2752637 A2 EP2752637 A2 EP 2752637A2
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EP
European Patent Office
Prior art keywords
signal
sabot
sensor
logic unit
magnetic sensor
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
EP13006033.8A
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German (de)
English (en)
Other versions
EP2752637B1 (fr
EP2752637A3 (fr
Inventor
Stephan Graeser
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.)
Diehl Defence GmbH and Co KG
Original Assignee
Diehl BGT Defence GmbH and Co KG
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Application filed by Diehl BGT Defence GmbH and Co KG filed Critical Diehl BGT Defence GmbH and Co KG
Publication of EP2752637A2 publication Critical patent/EP2752637A2/fr
Publication of EP2752637A3 publication Critical patent/EP2752637A3/fr
Application granted granted Critical
Publication of EP2752637B1 publication Critical patent/EP2752637B1/fr
Not-in-force 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
    • F42C15/00—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges
    • F42C15/40—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein the safety or arming action is effected electrically
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B14/00—Projectiles or missiles characterised by arrangements for guiding or sealing them inside barrels, or for lubricating or cleaning barrels
    • F42B14/02—Driving bands; Rotating bands
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B14/00—Projectiles or missiles characterised by arrangements for guiding or sealing them inside barrels, or for lubricating or cleaning barrels
    • F42B14/06—Sub-calibre projectiles having sabots; Sabots therefor
    • F42B14/067—Sealing aspects in sabots, e.g. sealing between individual segments of the sabots or sealing between the outer surface of the sabot and the inner surface of the barrel

Definitions

  • the invention relates to a safety device for an igniter of a subcaliber projectile and a corresponding Entommes vide for the safety device according to the invention.
  • US 5,265,539 is a sensor element of a fuse device for an igniter is known, which senses a second environmental condition.
  • the sensor element has for this purpose two sensory coils, which are arranged in the igniter in the projectile body, and a permanent magnet in the sabot.
  • the first coil is used for induction measurement, that is to say that the change in the magnetic flux density upon removal of the permanent magnet causes a change in the electric field.
  • the second coil allows a gradient measurement by difference measurement between the first and the second coil, whereby external interference fields are compensated.
  • a corresponding dipole magnet is arranged so that the departure of the sabot is sensed as a change in the magnetic field.
  • this fuse element Disadvantage of this fuse element is that the installation of the coils in the projectile body is structurally complex and requires an increased space requirement.
  • interference signals are to be expected in such an arrangement, for example, by leaving the gun barrel during firing, which may be of the order of the signals to be measured.
  • the signal generated by this method for a deliberate weft-related departure has in comparison to a manual unwanted detachment only a small difference, so that this signal is to evaluate the release of a detonator as not sufficiently clear. Measuring with solenoids requires signal amplification.
  • the invention is based on the object to increase the safety of detonators, in particular of detonators in sub-caliber bullets, and to minimize the risk of unwanted sharpening.
  • cost-effective ways to realize a safety device of a detonator are to be created.
  • An igniter of a subcaliber projectile with a projectile body, a slipping guide band and a sabot consisting of sabot segments has for this purpose a securing device.
  • the securing device has at least one securing element for sensing environmental conditions, designed such that a signal can be generated.
  • the security device has at least one logic unit and is such designed such that by means of the logic unit, the signal of the fuse element can be evaluated and a Entommessignal for detonator release can be generated.
  • the securing device is characterized in that a first securing element has a sensor element and at least one permanent magnet.
  • the sensor element has a magnetic sensor, in particular a magnetoresistive (MR) sensor, in the projectile body.
  • MR magnetoresistive
  • the permanent magnet is the magnetic sensor corresponding and arranged radially extending from the magnetic sensor in the guide band.
  • the first securing element is designed such that a rotational frequency of the guide belt can be sensed as the first environmental condition and a first signal can be generated.
  • a second securing element also has a sensor element and at least one permanent magnet.
  • the sensor element has at least one magnetic sensor, in particular a magnetoresistive (MR) sensor, in the projectile body.
  • the permanent magnet is corresponding to the magnetic sensor and arranged radially extending from the magnetic sensor in at least one sabot segment.
  • the second securing element is designed such that the outlet of the sabot segment can be sensed as a second environmental condition and a second signal can be generated.
  • the leader tape When a subcaliber projectile is fired from a drawn pipe, the leader tape is forced through the fields and trajectories of the pipe. In this case, a rotation is transmitted to the guide belt, which, however, is designed to slip through, so that the projectile body itself remains de-twisted.
  • the rotation of the guide band is tube-specific and depends on the respective load, ie the initial speed during firing, and corresponds to a few hundred hertz. This rotation is so specific that it is particularly well suited for use as an environmental condition. Sensing of the rotation is made possible by the use of the MR sensor in conjunction with the permanent magnet, since the MR sensor sits in the de-twisted projectile body and the permanent magnet in the rotating guide band. The MR sensor changes its resistance value when exposed to an external magnetic field.
  • a rotational frequency of the guide band can be calculated and thus is sensed as a first environmental condition.
  • the periodic change in resistance or the resistance over time provides a clear signal, which is a criterion for the Entommesvorgang as the first environmental condition. This signal is so specific that the risk of manipulation is almost eliminated.
  • the sensor element is here as a basic component for the realization of the electrical ignition system to understand, for example, in terms of power supply and signal processing and calculation.
  • a particular advantage is further that over the measured rotational frequency, the departure speed of the subcaliber projectile can be calculated back. This information can be used in a programmable detonator to ensure, for example, for a given period, an overflight safety by delaying the release or to optimize an ignition timing of the active charge.
  • the separation of the sabot occurs due to the occurring wind resistance. In this case, this is decomposed at predetermined breaking points in its individual sabot segments, so that the projectile body begins its wing-stabilized flight.
  • the departure of the sabot is therefore particularly suitable as a second environmental condition.
  • the sensing of the second environmental condition with the second securing element is also made possible by the use of at least one MR sensor, which is located in the projectile body and provides a constant resistance by the presence of a corresponding permanent magnet in the sabot.
  • the departure of the sabot and thus the separation of the permanent magnet of the magnetic sensor causes a change in the resistance within milliseconds and thus a clear measurement signal, which can use the fuse element as a second signal from a second environmental condition for the safety device.
  • MR sensors in thin-film technology are manufactured from silicon wafers, the components are very small, so that their installation can be carried out with little design effort. They are also characterized by a very high sensitivity to external magnetic fields, so that the sensing is possible even at an increased distance to the corresponding permanent magnet. No amplification of the signal is required. Particularly due to their resistance, for example in shock loads, and their longevity, the use in ammunition is particularly suitable, especially since MR sensors are inexpensive and can be produced in large numbers and commercially available.
  • the first securing element has a sensor element and at least two permanent magnets.
  • the permanent magnets are the magnetic sensor corresponding and arranged radially extending from the magnetic sensor at a predetermined angle to each other.
  • the first securing element is such designed so that two rotational frequencies of the guide band can be sensed as an environmental criterion. Due to the arrangement of the permanent magnets in the predetermined angle to each other to obtain a unique, coded signal, which is generated only when passing these magnets, z. B. offset by positioning radially by 45 °. As a result, manipulation by magnetic fields from the outside is not possible and minimizes the risk of unintentional release.
  • the second securing device on a sensor element and a plurality of permanent magnets.
  • the sensor element has magnetic sensors, in particular MR sensors, corresponding to the number of sabot segments in the projectile body.
  • At least one permanent magnet is in each case corresponding to a magnetic sensor and arranged radially extending from the magnetic sensor in each sabot segment.
  • the second securing element is designed such that the outlet of each sabot segment can be sensed as a second environmental condition.
  • Each individual sabot segment thus provides a unique measurement signal, which can be evaluated as an environmental condition. This has the advantage that in case of defect of an MR sensor, the function remains guaranteed. In addition, several signals are available for evaluation, the timing of which can be evaluated. This allows, for example, a safety backup, such that the fuse element sends a second signal to the logic unit only if the departure of the individual sabot segments took place in a predetermined time window. This is a tamper-evident because, for example, the manual detachment of all sabot segments at the same time within a second is almost impossible.
  • the sensing of the rotational frequency by the first fuse element and the subsequent evaluation of the first signal, the rotational frequency signal, by the logic unit, in conjunction with the target / actual adjustment ensures that the first signal is actually attributable to a launch of the subcaliber projectile.
  • the signals of the rotational frequency and the sabot-outgoing signal fundamentally differ from each other. This minimizes the risk of unwanted unlocking.
  • the Entommes vide on at least a first timer, such that the logic unit sends the Entommessignal for detonation only when the sabot segment outgoing signal, ie the second signal, after the rotational frequency signal, ie after the first signal, within a predetermined time window.
  • the specification of the order and the time window represents an increase in detonator safety and can be used as an here designated timer as an additional safety criterion.
  • the implementation of an additional time criterion is easy to implement in a logic unit without significantly increasing costs.
  • the Entommes vide on at least a second timer, such that the Logic unit sends the Entommessignal to detonator only if the departure of each sabot segment takes place in a given time window.
  • Figure 1 A and B shows Figure 1 A and B a Unterkalibergeunter in OperaLtuls abolish with rotating guide band (A) and departure of the sabot (B) and sketched elements of the safety device according to the invention and associated signals.
  • the Figure 1 A and B shows in a schematic diagram a Subkalibergeunter in partial longitudinal section.
  • the subcaliber projectile 10 has a projectile body 11, a slipping guide band 12 and a sabot 13 consisting of sabot segments 13.1, 13.2, 13.3.
  • the fuse device for the igniter 14 of the subcaliber projectile 10 has at least one fuse element for sensing environmental conditions and is designed such that a signal can be generated.
  • the securing device has at least one logic unit, which is located in the igniter 14 in the projectile nose. The securing device is designed in such a way that the signal of the securing element can be evaluated by means of the logic unit and an arming signal for releasing the igniter 14 can be generated.
  • a first securing element 21 has a sensor element 22 and at least one permanent magnet 23.
  • the sensor element 22 has a magnetic sensor, in particular an MR sensor, in the projectile body 11.
  • the permanent magnet 23 is arranged corresponding to the sensor element 22 and radially extending from the sensor element 22 in the guide belt 12.
  • the first securing element 21 is designed such that a rotational frequency of the guide belt 12 can be sensed as the first environmental condition and a first signal 31 can be generated.
  • the arrow in Figure 1 A indicates the rotation of the guide band 12.
  • the signal corresponds in the sketch of a sine wave, wherein a complete revolution of the guide band corresponds to a period length. If a second permanent magnet z. B. 45 ° offset in the guide band is attached, there is a second sine wave, which then follows offset in time to the first signal.
  • a second securing element 24 has a sensor element 22 and at least one permanent magnet 23.
  • the sensor element 22 has at least one magnetic sensor, in particular an MR sensor, in the projectile body 11.
  • the permanent magnet 23 is arranged corresponding to the magnetic sensor and radially extending from the magnetic sensor in at least one sabot segment 13.1 to 13.3.
  • the second securing element 24 is designed such that the outlet of the sabot segment 13.1 to 13.3 can be sensed as a second environmental condition and at least one second signal 32 can be generated.
  • the sabot 13 consists of three sabot segments 13.1, 13.2, 13.3.
  • each sabot segment 13.1 to 13.3 in each case a permanent magnet is arranged and opposite each are located in the projectile body 11 each magnetic sensors as a component connected to the sensor element, but these are not visible in the partial longitudinal section.
  • the arrows in Figure 1 B mark the departure of the sabot segments 13.1 to 13.3. Accordingly, three signals 32.1 to 32.3 are shown per outgoing sabot segment.
  • the signals generated at the departure of the respective sabot segments 13.1 to 13.3 must in this case take place within a predetermined time window 33.
  • the detachment speed of the segments is determined and additionally evaluated via a setpoint / actual adjustment. It can be seen that all signals are within the predetermined time window 33.
  • the sensor elements 22 as part of the first fuse element 21 and the second fuse element 24 are microcontrollers or a "system on the chip", which are directly connected to the logic unit of the igniter 14.
  • the logic unit is part of the igniter 14 and is also a microcontroller.
  • the power supply of the microcontroller is ensured by the igniter 14.
  • the first securing element 21 senses the rotational frequency of the guide belt 12 as the first environmental condition.
  • the MR sensor of the sensor element 22 of the first securing element 21 registers a change in the resistance when the guide belt 12 rotates. From the periodic change in resistance, a signal is generated by the sensor element 22, which transmits the first securing element 21 by means of sensor element 22 to the logic unit in the igniter 14.
  • the logic unit checks this signal via a setpoint / actual adjustment. If the signal corresponds to the desired value or desired signal, then the signal of the second fuse element 24 is checked. As a result, a first timer in the Entommesvon is included.
  • the second securing element 24 senses as a second environmental condition the departure of the individual sabot segments 13.1 to 13.3. For this, the individual MR sensors register the sensor element 22 of the second fuse element 24 each have a sudden change in resistance.
  • the sensor element 22 calculates three signals 32.1 to 32.3 from this.
  • the signals 32.1 to 32.3 are transmitted from the second securing element 24 by means of sensor element 22 to the logic unit in the igniter 14.
  • the logic unit checks these signals 32.1 to 32.3 via a setpoint / actual adjustment.
  • the logic unit checks whether the departure of each sabot segment 13.1 to 13.3 occurred within a time window 33 and sends an arming signal for releasing the igniter 14 only if the departure of the individual sabot segments 13.1 to 13.3 is within the predetermined time window 33.
  • the MR sensors in the projectile body 11 are located in the outermost periphery of the projectile axis 15, so that the distance from each sensor to the corresponding permanent magnet 23 is as small as possible.
  • the permanent magnet 23 is arranged both in the sabot segments 13.1 to 13.3 and in the slipping guide band 12 in the projectile body near.
  • the outer magnetic fields are each arranged close to the corresponding MR sensor and a significant signal can be generated.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Air Bags (AREA)
  • Measuring Magnetic Variables (AREA)
EP13006033.8A 2013-01-07 2013-12-20 Sécurité d'une fusée d'un projectile sous-calibre et procédé d'armement de cette fusée Not-in-force EP2752637B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102013000180.3A DE102013000180B3 (de) 2013-01-07 2013-01-07 Sicherungsvorrichtung für einen Zünder eines Unterkalibergeschosses und Entsicherungsverfahren hierfür

Publications (3)

Publication Number Publication Date
EP2752637A2 true EP2752637A2 (fr) 2014-07-09
EP2752637A3 EP2752637A3 (fr) 2017-07-26
EP2752637B1 EP2752637B1 (fr) 2018-09-19

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP13006033.8A Not-in-force EP2752637B1 (fr) 2013-01-07 2013-12-20 Sécurité d'une fusée d'un projectile sous-calibre et procédé d'armement de cette fusée

Country Status (3)

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EP (1) EP2752637B1 (fr)
DE (1) DE102013000180B3 (fr)
ZA (1) ZA201400003B (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015110627A1 (de) * 2015-07-01 2017-01-05 Rwm Schweiz Ag Aus einem gezogenen Waffenrohr verschießbares, flügelstabilisiertes Unterkalibergeschoss und Verfahren zu seiner Herstellung

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5265539A (en) 1992-06-19 1993-11-30 Alliant Techsystems Inc. Magnetic sensor arming apparatus and method for an explosive projectile

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7322822U (de) * 1973-06-19 1977-01-20 Fa. Diehl, 8500 Nuernberg Geschoss-fuehrungsring
US4187783A (en) * 1978-03-13 1980-02-12 The United States Of America As Represented By The Secretary Of The Army Discarding sabot munition
DE4005127A1 (de) * 1989-06-21 1991-08-22 Rheinmetall Gmbh Treibkaefig
DE4031208A1 (de) * 1990-10-04 1992-04-09 Rheinmetall Gmbh Segmentierter treibkaefig fuer ein tandemgeschoss
DE59806709D1 (de) * 1997-11-19 2003-01-30 Contraves Ag Geschoss mit programmierbarem Zeitzünder
DE19940553B4 (de) * 1999-08-26 2004-07-08 Rheinmetall W & M Gmbh Unterkalibriges Geschoß
US7004072B1 (en) * 2000-03-30 2006-02-28 Alliant Techsystems Inc. Magnetically sensed second environment safety and arming device
DE102008017437A1 (de) * 2008-04-03 2009-10-08 Rheinmetall Waffe Munition Gmbh Treibkäfiggeschoss

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5265539A (en) 1992-06-19 1993-11-30 Alliant Techsystems Inc. Magnetic sensor arming apparatus and method for an explosive projectile

Also Published As

Publication number Publication date
DE102013000180B3 (de) 2014-04-03
EP2752637B1 (fr) 2018-09-19
EP2752637A3 (fr) 2017-07-26
ZA201400003B (en) 2014-10-29

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