EP0789219B1 - Systemzustandwechsel-Anzeigegerät - Google Patents

Systemzustandwechsel-Anzeigegerät Download PDF

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Publication number
EP0789219B1
EP0789219B1 EP97400065A EP97400065A EP0789219B1 EP 0789219 B1 EP0789219 B1 EP 0789219B1 EP 97400065 A EP97400065 A EP 97400065A EP 97400065 A EP97400065 A EP 97400065A EP 0789219 B1 EP0789219 B1 EP 0789219B1
Authority
EP
European Patent Office
Prior art keywords
circuit
passive
primer
ammunition
mine
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
EP97400065A
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English (en)
French (fr)
Other versions
EP0789219A1 (de
Inventor
Loic Laine
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.)
Giat Industries SA
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Giat Industries SA
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Filing date
Publication date
Application filed by Giat Industries SA filed Critical Giat Industries SA
Publication of EP0789219A1 publication Critical patent/EP0789219A1/de
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Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
    • F41H11/00—Defence installations; Defence devices
    • F41H11/12—Means for clearing land minefields; Systems specially adapted for detection of landmines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C11/00—Electric fuzes
    • F42C11/001—Electric circuits for fuzes characterised by the ammunition class or type
    • F42C11/007—Electric circuits for fuzes characterised by the ammunition class or type for land mines

Definitions

  • the technical field of the invention is that of change visualization devices of a system, and more particularly that of devices for viewing the neutralized state ammunition, such as a mine.
  • Neutralized ammunition means ammunition whose the primer worked (without causing the explosion of ammunition), or ammunition whose primer cannot no longer be initiated because the energy source intended for feeding the primer is exhausted.
  • This device provides a gas generator which has for effect of operating a lock, or opening a contact of the firing chain, and which at the same time ejects a weight with a ribbon.
  • the display of the neutralized state of the ammunition is so done by observing the weight and the ribbon which must be clearly visible.
  • the flyweight is a mechanical element which may be stuck or stuck in its housing, its failure does not allow the detection of a state neutralized, even effective.
  • this solution implements a composition gas generator which can also be faulty and fail to account for the neutralized state.
  • the device according to the invention thus allows the remote and reliable visualization of the status neutralized ammunition, regardless of its position on the ground or in the ground.
  • the invention allows this visualization with a higher reliability than known devices, everything by not consuming energy and having a lifespan almost unlimited.
  • the invention makes it possible to view remotely the change of state of any system, and can be implemented works outside the armaments field.
  • the device according to the invention does not use no pyrotechnic composition and can be easily operated by any mechanical or electronic device.
  • the device according to the invention also makes it possible to spot dummy mines in an actual minefield at after a certain time interval.
  • the subject of the invention is a device for visualization of the change of state of a system and in particular for viewing the neutralized state of a ammunition such as a mine, device characterized in that it comprises at least one passive oscillating circuit, integral with the system, and tuned to a certain frequency, circuit to terminals of which a short circuit is mounted, the short circuit being capable of being opened by cutting means activated when the system status changes, passive oscillating circuit intended to be put into resonance by a means of detection external to the system and comprising at least one tunable active oscillating circuit on the natural frequency of the passive oscillating circuit.
  • the means of are activated in response to the operation of a primer intended to initiate ammunition.
  • the cutting means may thus include a part of the short circuit which is a conductor placed at near or in contact with the primer.
  • the means of break can include at least one passive switch semiconductor which is activated when changing system status.
  • the passive switch may be actuated in response to the discharge of an energy source arranged in the ammunition and intended to ensure the firing of a primer initiation of ammunition.
  • the passive switch is a MOS transistor whose base is connected to the source of energy and that sits open when the voltage of the energy source is less than a threshold voltage the transistor.
  • the means of break may include a passive semiconductor switch connected in series with a conductor passing through near or in contact with the primer.
  • the cut-off means include a portion of circuit likely to corrode up to opening of the circuit after a certain time.
  • the unprotected part of the circuit may be at least partially covered during installation from the mine by a corrosive substance.
  • the unprotected part of the circuit can receive at less material forming an electrolytic couple with it.
  • a device for visualization of the change of state of a system 1 (which is not shown in detail) includes a circuit passive oscillator 2, integral with system 1, and a means of detection 3, outside system 1.
  • the passive oscillating electric circuit 2 comprises a choke 4, at the terminals of which a capacity 5. At terminals A and B of the oscillating circuit 2 is finds a short circuit 6 which can be opened by switching means 7 (such as a switch), actuated by a control means 8 at the time of a change of state of the system.
  • switching means 7 such as a switch
  • the system could for example be a munition (such a dispersible mine), and the change of state considered will be the neutralization of this mine (put out of state to be initiated).
  • a munition such as a dispersible mine
  • the system could also be a device used in the civil field. For example a system indicating risk when entering a hazardous area (system changing state when a radio appears activity). Or a system accounting for the corrosion of a pipe or a metallic structure (in this case the short circuit will be opened by the corrosion).
  • the detection means 3 here comprises on the one hand a generator 9, containing an active oscillating circuit, and coupled to a transmitting coil 10, and on the other hand a take-up coil 11 connected to an amplifier circuit reception 12.
  • the active oscillating circuit is tuned to the natural frequency of the passive oscillating circuit 2.
  • a bandpass filter 13 receives the signals transmitted by the generator 9 and those received and amplified by circuit 12. It isolates in the signal received by the coil 11 the lines which are due to the magnetic field emitted by coil 10, this in order to avoid disturbances due to outdoor fields.
  • the filter 13 could for example be a filter synchronous whose principle is well known to the man of the job.
  • the filter is connected to a variation detector 14 which is itself connected to a signaling means 15 (display, headphones or speaker ).
  • Switch 7 is closed when the system is located in its first state, for example for ammunition, the active state. Short-circuit 6 is then effective and the passive oscillating circuit 2 is inactive.
  • the field electromagnetic emitted by the coil 10 can not put in resonance of the passive circuit 2.
  • the take-up coil 11 does not therefore detects no signal emitted by the inductor 4.
  • switch 7 When system 1 changes state (for example when ammunition is neutralized), switch 7 is open by the control means 8.
  • Terminals A and B of passive circuit 2 are no longer then short-circuited and the passive oscillating circuit 2 can be brought into resonance by the detection means 3.
  • the detection means 3 When the detection means 3 passes close to the system 1, the field emitted by the coil 10 generates a current in the passive circuit 2.
  • This current causes a modification of the field magnetic near the passive circuit. This modification results in a variation in the amplitude of the voltage across the receiving coil 11. This variation is detected by detector 14 which activates the signaling means 15.
  • Such an embodiment of the detection means 3 allows to separate the "generation of a field” function magnetic "and the function” detection of a disturbance of the field ".
  • an active oscillating circuit comprising a single transmitting antenna and connected to a variation detector.
  • the active circuit is then still tuned to a frequency which is the same as that of the passive oscillating circuit 2.
  • the variation detector chosen will also be of the type known (for example a synchronous detector) its threshold of sensitivity will be adapted to allow detection of the passive circuit at an acceptable distance (for example from the order of the meter).
  • the active oscillating circuit could also be a circuit generating a swept frequency (variable frequency) whose domain of variation will cover the natural frequency of the passive oscillating circuit 2.
  • Figure 2 shows the display device according to the invention adapted to a system 1 which is a munition (not shown in detail) with an explosive charge 16 (here a hollow charge), initiated by a relay 17, itself initiated by an electric primer 18 connected to a rocket electronics 19.
  • a munition not shown in detail
  • an explosive charge 16 here a hollow charge
  • the primer 18 is carried by a drawer 20 which is part a security and arming device of known type (we see for example patent FR2650662 which describes a such device).
  • the drawer is shown here in position safety (primer 18 not aligned with relay 17). he can translate so as to bring the primer 18 opposite of relay 17 (armed position).
  • the short circuit 6 is produced here in the form of a wire 24 of small diameter (of the order of 0.1 mm). Ways short circuit breakers are made up of a part 21 of the short-circuit wire 6 which is placed in contact with the primer 18.
  • the invention makes it possible to view this neutralized state, even if the ammunition is completely invisible (for example a buried mine).
  • the wire short circuit 6 it is possible to place the wire short circuit 6 at some distance from the initiator, the energy developed by it being sufficient to ensure the destruction of the wire.
  • Wire 24 can also be replaced by a ribbon thin conductor, for example a conductor deposited or screen printed on a plastic support.
  • the wire 24 can also be produced in the form a printed circuit track positioned in the vicinity or in contact with the primer.
  • the short circuit wire will be attached to the mobile organ which will ensure its rupture.
  • the cutting means 7 could also be constituted by a switch opened by the movement of the mobile organ.
  • Figure 3 shows a display device according to a second embodiment of the invention.
  • System 1 is again a munition whose charge explosive (not shown) is initiated by a primer electric 18 connected to an electronic rocket 19.
  • the rocket is powered by an energy source 22, like a lithium battery.
  • the ammunition is usually considered to be neutralized when the energy source is discharged because it can then no longer cause the initiation of the primer.
  • the breaking means 7 of the short circuit 6 are here constituted by a passive semiconductor switch which is for example a transistor 23 of MOS technology (Metal Oxide Semi conductor).
  • This transistor is here of the type "channel N", that is to say that it lets the current flow for a positive tension between its base (G) and its source (S).
  • the Drain (D) and the source (S) of this transistor are connected to terminals A and B of the passive oscillating circuit 2.
  • the base (Gate G) of the transistor is connected to the positive output (+) of the voltage source 22 which supplies the rocket 19.
  • the negative output (-) of the voltage source 22 is also the common pole of all circuits and it is connected to the source (S) of transistor 23.
  • the transistor switching threshold range 23 i.e. greater than 2 volts
  • the MOS will be chosen so that the voltage at which occurs its blocking (Vmin) is less than the minimum tension which would allow initiation of the primer.
  • the oscillating circuit 2 can then be put into resonance by the detection means.
  • the ammunition which is neutralized following the discharge of its energy source can therefore be easily detected. Detection is possible even if it is a buried mine.
  • MOS transistor 23 As a variant, it is possible to replace in circuit 2 capacitance 5 by MOS transistor 23 even. Indeed the latter has an internal capacity between Drain (D) and source (S) of the order of 100 pico-farads that it is possible to use to realize the circuit passive oscillating 2.
  • D Drain
  • S source
  • FIG 4 shows another embodiment of the invention in which the switching means comprise a static switch (MOS transistor 23) mounted in series with a wire 24 of small diameter comprising a part 21 placed in contact with the primer 18.
  • MOS transistor 23 static switch
  • This embodiment makes it possible to make the passive circuit 2 when the neutralization is due to initiation of primer 18 or when it is consecutive to the discharge of the energy source 22.
  • Figures 5a, 5b, 5c illustrate another mode of embodiment of the invention more particularly intended for allow, during demining operations, detection dummy mines.
  • the invention makes it easy to detect mines neutralized among those that are still active. We thus facilitates and accelerates demining operations, because it is no longer necessary to take precautions for identify neutralized mines.
  • the preceding embodiments facilitate the demining operations by allowing the visualization of real mines which are neutralized.
  • a first solution to this problem is to endow the dummy mine of a chronometry module which receives during laying of the mine a program corresponding to the duration of employment envisaged for the minefield.
  • This chronometric module can be mechanical and understand for example a piston which will move at the end of the period programmed to break the short circuit of a passive oscillating circuit according to the invention.
  • the time module can also be electronic and order at the end of the programmed interval the blocking a static switch.
  • FIG. 5a shows another very embodiment inexpensive in which no timekeeping system is necessary.
  • the dummy mine 25 includes a housing 26 in which a passive oscillating circuit 2 is placed.
  • This oscillating circuit is produced here in the form of electronic components soldered to a printed circuit 27 (see also Figure 5b).
  • the circuit is embedded in a protective resin 28 which fills the entire housing 26.
  • the short circuit 6 has the shape of a jumper mounted on pins carried by the printed circuit 27. Only short circuit 6 is located the outside of the resin 28.
  • the short circuit 6 is shown alone in FIG. 5c. It includes a bulb-shaped support 29 (made of glass or plastic) on which the pins are fixed connection 30. A small diameter wire 31 is disposed between the pins 30 inside the bulb 29 which constitutes a sealed receptacle.
  • the wire is chosen from a material which oxidizes on contact air humidity (for example a material based of iron).
  • Figures 6a and 6b show another mode of particularly cheap realization in which the passive oscillating circuit 2 is carried by a label 32 made of a flexible plastic material, for example Nylon (or even paper).
  • a label 32 made of a flexible plastic material, for example Nylon (or even paper).
  • a label with a passive oscillating circuit is known for example in the field of anti-theft systems intended for businesses (see for example the patent GB2105952).
  • the label 32 carries on each of its faces a deposit metallic.
  • the deposit will be made for example by screen printing. All the conductive deposits constitute a oscillating electric circuit comprising an inductance 4 at the terminals of which a capacitor 5 is mounted, circuit shunted by a short circuit 6.
  • a reinforcement 5a of the capacity is carried by a face of label 32, the other frame 5b is carried by the other side of the label.
  • Label material constitutes the dielectric of this capacitance.
  • the inductance is carried by a single face of the label and it is formed by a conductive track in spiral shape.
  • the frame 5b of the capacity is connected to the inductance by a connection 33 which crosses the label.
  • connection by providing a hole through the label and which is filled after production by a conductive material. We will be able to also metallize the hole.
  • the short circuit 6 here passes from one face to the other by one of the edges 32a of the label. It will suffice for this to make the circuit on one side of a sheet which will then be folded along the edge 32a and glued, the connection 33 is made after gluing the sheet.
  • This unprotected area is covered with an adhesive protector 35.
  • the circuit thus produced is glued to a mine dummy.
  • the adhesive is removed protector 35 so as to leave in contact with moisture of air the part of the short circuit 6 which is not protected.
  • the materials forming the electrolytic couple are mutually degrade according to chemical kinetics which is well known and easy to master.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Selective Calling Equipment (AREA)
  • Alarm Systems (AREA)
  • Burglar Alarm Systems (AREA)
  • Emergency Alarm Devices (AREA)
  • Eye Examination Apparatus (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)

Claims (10)

  1. Systemzustandswechsel-Anzeigegerät zum Gegenstand, vor allem ein Gerät zur Anzeige des entschärften Zustands von Munition, etwa einer Mine, sich dadurch gekennzeichnet, daß es mindestens einen passiven Schwingkreis enthält, der mit dem System verbunden und auf einer bestimmten Frequenz eingestellt ist, wo ein Kurzschluß auf der Schwingkreisklemmen montiert ist, der Kurzschluß durch Unterbrechungsmittel geöffnet werden kann, die während des Zustandswechsels des Systems bewegt werden, wobei der passive Schwingkreis, der dazu dient, durch ein außerhalb des Systems befindliches Detektionsmittel in Schwingung gebracht werden kann, und der mindestens einen aktiven Schwingkreis enthält, der auf die Frequenz des passiven Schwingkreises eingestellt werden kann.
  2. Gerät nach Anspruch 1, dadurch gekennzeichnet, daß die Unterbrechungsmittel als Reaktion auf die Funktion einer Sprengkapsel bewegt werden, die dazu dient, die Munition zu zünden.
  3. Gerät nach Anspruch 2, dadurch gekennzeichnet, daß die Unterbrechungsmittel einen Teil eines Kurzschlusses enthalten, der ein in der Nähe oder mit Kontakt zur Sprengkapsel angebrachter Leiter ist.
  4. Gerät nach Anspruch.3, dadurch gekennzeichnet, daß die Unterbrechungsmittel mindestens einen passiven Halbleiter-Schalter enthalten, der beim Zustandswechsel des Systems ausgelöst wird.
  5. Gerät nach Anspruch 4, dadurch gekennzeichnet, daß der passive Schalter in Reaktion auf die Entladung einer Energiequelle bewegt wird, die sich in der Munition befindet und dazu dient, die Zündung der Sprengkapsel der Munition zu gewährleisten.
  6. Gerät nach Anspruch 5, dadurch gekennzeichnet, daß der passive Schalter ein MOS-Transistor ist, dessen Basis mit der Energiequelle verbunden und der geöffnet ist, wenn die Spannung der Energiequelle niedriger ist als die Schwellenspannung des Transistors.
  7. Gerät nach Anspruch 3 und einem der Ansprüche 5 oder 6, dadurch gekennzeichnet, daß die Unterbrechungsmittel einen passiven Halbleiter-Schalter enthalten, der mit einem Leiter in Reihe und in der Nähe oder mit Kontakt zur Sprengkapsel montiert ist.
  8. Gerät nach Anspruch 1, das vor allem Scheinminen behandelt, die zwischen echte Minen gelegt werden, dadurch gekennzeichnet, daß die Unterbrechungsmittel ein Schwingkreisteil enthalten, das dazu neigt, nach Ablauf einer gewissen Zeit, bis de Schwingkreis sich öffnet, zu korrodieren.
  9. Gerät nach Anspruch 8, dadurch gekennzeichnet, daß das nicht geschützte Schwingkreisteil zumindest teilweise durch eine korrosive Substanz bei Auslegen der Mine bedeckt wird.
  10. Gerät nach Anspruch 8 oder 9, dadurch gekennzeichnet, daß das nicht geschützte Schwingkreisteil zumindest ein Material erhalten könnte, das mit ihm ein elektrolytisches Paar bildet.
EP97400065A 1996-01-19 1997-01-15 Systemzustandwechsel-Anzeigegerät Expired - Lifetime EP0789219B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9600625A FR2743878B1 (fr) 1996-01-19 1996-01-19 Dispositif de visualisation du changement d'etat d'un systeme
FR9600625 1996-01-19

Publications (2)

Publication Number Publication Date
EP0789219A1 EP0789219A1 (de) 1997-08-13
EP0789219B1 true EP0789219B1 (de) 2000-11-29

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP97400065A Expired - Lifetime EP0789219B1 (de) 1996-01-19 1997-01-15 Systemzustandwechsel-Anzeigegerät

Country Status (5)

Country Link
EP (1) EP0789219B1 (de)
AT (1) ATE197847T1 (de)
CA (1) CA2195469A1 (de)
DE (1) DE69703592T2 (de)
FR (1) FR2743878B1 (de)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2105952A (en) * 1981-08-11 1983-03-30 Standard Telephones Cables Ltd Antitheft label
FR2563001B1 (fr) * 1984-04-16 1987-09-25 France Etat Armement Dispositif de neutralisation et de visualisation de la neutralisation d'un systeme d'amorcage
US5027709A (en) * 1990-04-26 1991-07-02 Slagle Glenn B Magnetic induction mine arming, disarming and simulation system

Also Published As

Publication number Publication date
FR2743878B1 (fr) 1998-03-27
DE69703592T2 (de) 2001-05-31
CA2195469A1 (fr) 1997-07-20
DE69703592D1 (de) 2001-01-04
EP0789219A1 (de) 1997-08-13
FR2743878A1 (fr) 1997-07-25
ATE197847T1 (de) 2000-12-15

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