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EP0300255B1 - Dispositif numérique de réglage d'un compteur servant à initier un détonateur à temporisation d'un obus - Google Patents

Dispositif numérique de réglage d'un compteur servant à initier un détonateur à temporisation d'un obus Download PDF

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Publication number
EP0300255B1
EP0300255B1 EP88110621A EP88110621A EP0300255B1 EP 0300255 B1 EP0300255 B1 EP 0300255B1 EP 88110621 A EP88110621 A EP 88110621A EP 88110621 A EP88110621 A EP 88110621A EP 0300255 B1 EP0300255 B1 EP 0300255B1
Authority
EP
European Patent Office
Prior art keywords
coil
projectile
pulses
measuring
receiving coil
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.)
Expired - Lifetime
Application number
EP88110621A
Other languages
German (de)
English (en)
Other versions
EP0300255A1 (fr
Inventor
Godwin Ettel
Markus Suter
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.)
Rheinmetall Air Defence AG
Original Assignee
Werkzeugmaschinenfabrik Oerlikon Buhrle AG
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 Werkzeugmaschinenfabrik Oerlikon Buhrle AG filed Critical Werkzeugmaschinenfabrik Oerlikon Buhrle AG
Publication of EP0300255A1 publication Critical patent/EP0300255A1/fr
Application granted granted Critical
Publication of EP0300255B1 publication Critical patent/EP0300255B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C17/00—Fuze-setting apparatus
    • F42C17/04—Fuze-setting apparatus for electric fuzes

Definitions

  • the invention relates to a device for digitally setting a counter for triggering a time fuse in a projectile after it has been fired, the counter being set inductively by a transmitter coil fastened in front of the weapon via a receiver coil located in the projectile, with a device for measuring the muzzle velocity of the projectile to set the timer trigger trigger depending on this muzzle velocity.
  • the transmitter coil is not magnetized between these signals. With this type of signaling, a dead time between the individual signals of approximately ten times the pulse duration of the signal is required. In order to If at least 8 to 10 pulses can be transmitted in the time available when the projectile passes through the transmitter coil, a transmission frequency of 100 kHz is required if the transmitter coil is 12 cm wide and the projectile speed is assumed to be 1200 m / sec.
  • a control coil is attached to the muzzle of the weapon barrel, which determines the time to trigger the ignition when the projectile passes through a receiver of the projectile detonator.
  • a current flows through the control coil, the current intensity of which is a measure of the desired value to be set, and the reception circuit has a reception coil and means for evaluating the level of the voltage induced in the reception coil when the control coil flies through.
  • the level of the voltage induced in the receiving coil when the control coil flies through depends firstly on whether the projectile flies exactly through the center of the control coil and secondly whether the projectile flies through the control coil at the desired initial speed.
  • the object that is to be achieved with the present invention is to create a device of this type, which is able, firstly, to generate more pulses in the time available when the projectile passes through the transmitter coil from the transmitter coil to the receiver coil second, to improve the redundancy of these impulses in order to achieve a more reliable information transmission and thirdly, to switch off undesired interference pulses which are generated, for example, by the device for measuring the muzzle velocity.
  • this object is achieved in that the pulses transmitted from the transmitting coil to the receiving coil are double pulses.
  • the generation of double pulses makes it possible to significantly reduce the dead time between the individual signals. Instead of a dead time that is ten times the pulse duration, thanks to the double pulses, a dead time that is the same as the pulse duration is sufficient.
  • the time constant L / R can be set to approx. 150 ns with a resistance of 3 ohms. This leads to a rapid decay of the induced pulse voltage in the projectile coil and thus to short dead times between the pulses. Thanks to the use of an ohmic resistor in parallel with the induction coil, there is no need for an amplifier to generate the pulses.
  • the weapon barrel muzzle 10 is surrounded by a three-part cage 11, 12, 13, which projects beyond the weapon barrel muzzle 10.
  • a first measuring coil 14 In the middle part 12 of the cage there is a first measuring coil 14 and in the front part 13 of the cage there is a second measuring coil 15 and a transmitting coil 16.
  • Lines 17 and 18 are provided for the electrical supply of the two measuring coils 14 and 15.
  • a number of soft iron rods 19 are inserted in the three-part cage 11, 12, 13 to shield the entire measuring system from interference from magnetic fields, of which only two are visible in FIG.
  • the transmitter coil 16 consists of a single turn 20 and a coil body 21.
  • a projectile 22 flies in the direction of arrow A through the device for measuring the initial speed and for transmitting information, ie through the two measuring coils 14 and 15 and through the transmitter coil 16 .
  • the device described so far differs from known devices of this type essentially in that the transmitter coil 16 consists of a single turn 20 and is relatively narrow.
  • the time t which the projectile 22 needs to get from the coil 14 to the coil 15 is measured.
  • a timer 24 located in the projectile 22 can thus be set or "temped” so that the projectile 22 is ignited in the area of the target.
  • This time which the projectile needs to reach the destination when it exits the pipe mouth 10, is transmitted in digital form from the transmitting coil 16 to a receiving coil 23 in the projectile 22.
  • the transmission takes place inductively.
  • To set the timer 24 with the desired accuracy at least twelve pulses should be transmitted from the transmitter coil 16 to the receiver coil 23. Since, as already mentioned, the projectile 22 flies through the transmitting coil 16 at a speed of approximately 1200 meters per second, it is necessary to transmit the twelve pulses at a relatively high frequency at the right time.
  • the correct time for sending the pulses is determined with the help of the front measuring coil 15 of the device for measuring the muzzle velocity. As soon as the projectile 22 has flown through the coil 15, the information can be transmitted from the transmitter coil 16 to the receiver coil 23.
  • the pulses with the required frequency are transmitted from the transmitting coil 16 to the receiving coil 23 , it is necessary on the one hand to make the inertia of the induction coil 16 as small as possible and to replace other inert elements such as amplifiers by other less inert elements.
  • the signal "1" consists of two pulses or a double pulse, the first part of the double pulse being generated by a positive voltage "+ U” and the second part of the double pulse being generated by a negative voltage "- U”.
  • the signal “0” consists of two pulses or a double pulse, the first part of the double pulse being generated by a negative voltage "- U” and the second part of the double pulse being generated by a positive voltage "+ U”.
  • Both the positive pulse "+ U” and the negative pulse "- U” last e.g. 400 nanoseconds, i.e. the time required for the double pulse is 800 nanoseconds and 800 nanoseconds are sufficient for the dead time between the individual double pulses. Thanks to these double impulses, it is possible to get by with ten times less dead time than before.
  • the inductive transmitter coil 16 is connected to two switches 25 and 26, with which either positive or negative pulses "+ U" respectively. "- U” can be generated.
  • an ohmic resistor 27 is connected in parallel to the transmitter coil 16. This ohmic resistor 27 can be switched off by a capacitor 28 so that it only is effective at the desired time.
  • the previously common power amplifier for modulating the transmitter coil is replaced by a switching stage.
  • a resistor 33 is connected to the receiving coil 23 located in the floor 22, which forms a time constant L / R with the receiving coil in the usual way.
  • a filter 29 is connected to this combination, which is constructed in the usual way from ohmic resistors 30 and capacitors 31 and is referred to here as a high-pass filter. This filter 29 prevents pulses from the measuring device for the muzzle velocity of the projectile 22 from being transmitted as interference pulses from the receiving coil 23 to the igniter 24 via the counter 32 (FIG. 1).
  • the structure of the entire transmitter system is shown in Fig. 5.
  • the two measuring coils 14 and 15 (FIG. 1) are connected to a process computer 133, on the other hand a register 34 and finally a toggle switch 35 which is separated by two undates 36 and 37 is formed.
  • the process computer 133 receives the information from the measuring coils 14 and 15 that the projectile 22 is in the area of the two measuring coils 14 and 15.
  • the process computer 133 is therefore able to calculate when the projectile 22 passes through the transmitter coil 16 (FIG. 1).
  • the process computer 133 can thus send a signal to the toggle switch 35 which initiates the transmission of the usual information stored in the register 34 by the process computer 133.
  • a multivibrator 38 is connected to the toggle switch 35 and can deliver pulses to a counter 39 in the usual manner at regular intervals. This multivibrator 38 is put into operation by the toggle switch 35.
  • a selector 40 is arranged between the register 34 and the counter 39. This selector 40 selects the numbers contained in the register 34 in accordance with the numbers formed in the counter 39 by the multivibrator 38 and forwards this information to the inputs of four undates 41-44.
  • Two univibrators 45 and 46 are also connected to the inputs of these undates 41-44. These univibrators 45 and 46 generate a pulse of a given pulse duration, for example 1 .mu.sec, for each piece of information.
  • the outputs of the two undates 41 and 42 are common to a further undate 47 and the outputs of the two undates 43 and 44 are common to another undate 48 connected.
  • the outputs of the two und gates 47 and 48 are connected to a driver stage 50.
  • This driver stage 50 controls the switches 25 and 26 shown in FIG. 3. Negative pulses arrive at the switch 26 from the und gate 47 and positive pulses arrive at the switch 25 from the und gate 48.
  • the counter 39 is connected to the toggle switch 35 via a gate 51, as a result of which the entire transmission system shown in FIG. 4 can be reset to its starting position after each transmission process.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Measurement Of Unknown Time Intervals (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Near-Field Transmission Systems (AREA)

Claims (4)

1. Dispositif pour initialiser de manière numérique un compteur (32) pour déclencher un détonateur à temporisation (24) d'un obus (22) après son tir, le compteur (32) étant réglé par induction par une bobine d'émission (16) fixée devant l'embouchure (10) du canon d'une arme par l'intermédiaire d'une bobine de réception (23) embarquée sur l'obus (22), et une installation (14, 15) pour mesurer la vitesse initiale (Vo) de l'obus (22) pour régler le compteur (32) pour déclencher le détonateur à temporisation (24) en fonction de la vitesse initiale, dispositif caractérisé en ce que les impulsions transmises par la bobine d'émission (16) à la bobine de réception (23) sont des impulsions doubles.
2. Dispositif selon la revendication 1, caractérisé en ce qu'une résistance ohmique (27) est branchée en parallèle sur la bobine d'émission (16) pour optimiser la constante de temps L/R pour la transmission des informations.
3. Dispositif selon la revendication 1, caractérisé par une résistance (33) branchée en parallèle sur la bobine de réception (23) pour optimiser la constante de temps L/R pour la transmission des informations.
4. Dispositif selon la revendication 1, caractérisé par un filtre (29) branché sur la bobine de réception (23) pour supprimer les impulsions parasites engendrées par l'installation (14, 15) mesurant la vitesse initiale.
EP88110621A 1987-07-20 1988-07-04 Dispositif numérique de réglage d'un compteur servant à initier un détonateur à temporisation d'un obus Expired - Lifetime EP0300255B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH273587 1987-07-20
CH2735/87 1987-07-20

Publications (2)

Publication Number Publication Date
EP0300255A1 EP0300255A1 (fr) 1989-01-25
EP0300255B1 true EP0300255B1 (fr) 1991-04-24

Family

ID=4240430

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88110621A Expired - Lifetime EP0300255B1 (fr) 1987-07-20 1988-07-04 Dispositif numérique de réglage d'un compteur servant à initier un détonateur à temporisation d'un obus

Country Status (8)

Country Link
US (1) US4862785A (fr)
EP (1) EP0300255B1 (fr)
JP (1) JP2563128B2 (fr)
CN (1) CN1014449B (fr)
CA (1) CA1324031C (fr)
DE (1) DE3862536D1 (fr)
ES (1) ES2022539B3 (fr)
ZA (1) ZA885212B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6138547A (en) * 1996-04-18 2000-10-31 Bofors Ab Programmable barrel weapon
US6170377B1 (en) 1996-04-18 2001-01-09 Bofors Ab Method and arrangement for programming shells

Families Citing this family (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3830518A1 (de) * 1988-09-08 1990-03-22 Rheinmetall Gmbh Vorrichtung zur einstellung eines geschosszeitzuenders
US5241892A (en) * 1989-07-28 1993-09-07 Accudyne Corporation Method and apparatus for time setting ballistic fuzes
SE465794B (sv) * 1990-03-15 1991-10-28 Bofors Ab Anordning foer att bestaemma rollvinkel
EP0467055B1 (fr) * 1990-07-19 1993-10-27 Oerlikon-Contraves AG Bobine réceptrice pour fusée programmable d'un projectile
US5343795A (en) * 1991-11-07 1994-09-06 General Electric Co. Settable electronic fuzing system for cannon ammunition
US5497704A (en) * 1993-12-30 1996-03-12 Alliant Techsystems Inc. Multifunctional magnetic fuze
DE59608912D1 (de) * 1995-09-28 2002-04-25 Contraves Pyrotec Ag Verfahren und Vorrichtung zum Programmieren von Zeitzündern von Geschossen
US5827958A (en) * 1996-01-05 1998-10-27 Primex Technologies, Inc. Passive velocity data system
NO311953B1 (no) 1996-04-19 2002-02-18 Contraves Ag Fremgangsmåte og innretning for å bestemme et programmerbart prosjektils oppdelingstidspunkt
NO312143B1 (no) 1996-04-19 2002-03-25 Contraves Ag Fremgangsmåte for å bestemme önsket oppdelingstidspunkt, s¶rlig for et programmerbart prosjektil
NO311954B1 (no) 1996-04-19 2002-02-18 Contraves Ag Fremgangsmåte for å bestemme et programmerbart prosjektils oppdelingstidspunkt
US6125308A (en) * 1997-06-11 2000-09-26 The United States Of America As Represented By The Secretary Of The Army Method of passive determination of projectile miss distance
US5894102A (en) * 1997-12-31 1999-04-13 Aai Corporation Self-correcting inductive fuze setter
ES2172969T3 (es) * 1998-10-08 2002-10-01 Contraves Ag Procedimiento y dispositivo para la transmision de informaciones a proyectiles programables.
US7004072B1 (en) * 2000-03-30 2006-02-28 Alliant Techsystems Inc. Magnetically sensed second environment safety and arming device
DE50209260D1 (de) * 2001-03-14 2007-03-08 Rwm Schweiz Ag Projektil und Verfahren zu dessen Herstellung
US6557450B1 (en) * 2002-02-13 2003-05-06 The United States Of America As Represented By The Secretary Of The Navy Power indicating setter system for inductively-fuzed munitions
US7926402B2 (en) * 2006-11-29 2011-04-19 Alliant Techsystems Inc. Method and apparatus for munition timing and munitions incorporating same
DE102009011447B9 (de) * 2009-03-03 2012-08-16 Diehl Bgt Defence Gmbh & Co. Kg Verfahren zum Zünden eines Gefechtskopfs einer Granate und Fahrzeug
DE102010006530B4 (de) 2010-02-01 2013-12-19 Rheinmetall Air Defence Ag Programmierbare Munition
DE102010006528B4 (de) * 2010-02-01 2013-12-12 Rheinmetall Air Defence Ag Verfahren und Vorrichtung zur Programmierung eines Projektils
DE102011018248B3 (de) * 2011-04-19 2012-03-29 Rheinmetall Air Defence Ag Vorrichtung und Verfahren zur Programmierung eines Geschosses
CN102620603A (zh) * 2012-03-31 2012-08-01 中国人民解放军济南军区72465部队 防空高炮炮口初速测量线圈及时间装定线圈安装结构
KR101498195B1 (ko) * 2012-12-28 2015-03-05 주식회사 한화 탄속 측정 장치 및 방법
US10514234B2 (en) 2013-03-27 2019-12-24 Nostromo Holdings, Llc Method and apparatus for improving the aim of a weapon station, firing a point-detonating or an air-burst projectile
US11933585B2 (en) 2013-03-27 2024-03-19 Nostromo Holdings, Llc Method and apparatus for improving the aim of a weapon station, firing a point-detonating or an air-burst projectile
US9255776B1 (en) * 2014-09-15 2016-02-09 The United States Of America As Represented By The Secretary Of The Army Muzzle velocity sensor for smart ammunition
KR102615792B1 (ko) 2021-10-12 2023-12-20 주식회사 센서피아 공중 폭발탄 및 공중폭발 신호전달장치

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US4142442A (en) * 1971-12-08 1979-03-06 Avco Corporation Digital fuze
US4320704A (en) * 1972-06-09 1982-03-23 Dynamit Nobel Ag Electronic projectile fuse
DE2316976C3 (de) * 1973-04-05 1981-08-06 Diehl GmbH & Co, 8500 Nürnberg Anordnung zum Programmieren eines Geschoßzünders
CH589838A5 (fr) * 1975-03-10 1977-07-15 Oerlikon Buehrle Ag
CH598564A5 (fr) * 1976-03-09 1978-04-28 Oerlikon Buehrle Ag
US4283989A (en) * 1979-07-31 1981-08-18 Ares, Inc. Doppler-type projectile velocity measurement and communication apparatus, and method
DE3307785A1 (de) * 1983-03-04 1984-09-06 Deutsch-Französisches Forschungsinstitut Saint-Louis, Saint-Louis Verfahren und vorrichtung zur einstellung eines geschoss-zeitzuenders
US4652642A (en) * 1984-08-23 1987-03-24 Smithkline Beckman Corporation Azidobenzazepines
JPS61260744A (ja) * 1985-05-14 1986-11-18 Sharp Corp パルストランスの駆動方式
US4649796A (en) * 1986-06-18 1987-03-17 The United States Of America As Represented By The Secretary Of The Army Method and apparatus for setting a projectile fuze during muzzle exit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6138547A (en) * 1996-04-18 2000-10-31 Bofors Ab Programmable barrel weapon
US6170377B1 (en) 1996-04-18 2001-01-09 Bofors Ab Method and arrangement for programming shells

Also Published As

Publication number Publication date
CN1014449B (zh) 1991-10-23
JP2563128B2 (ja) 1996-12-11
DE3862536D1 (de) 1991-05-29
JPS6441799A (en) 1989-02-14
CN1030825A (zh) 1989-02-01
US4862785A (en) 1989-09-05
ES2022539B3 (es) 1991-12-01
CA1324031C (fr) 1993-11-09
ZA885212B (en) 1989-03-29
EP0300255A1 (fr) 1989-01-25

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