EP0235115B1 - Fusée de proximité pour la mise à feu d'une charge creuse, destinée en particulier à une mine - Google Patents
Fusée de proximité pour la mise à feu d'une charge creuse, destinée en particulier à une mine Download PDFInfo
- Publication number
- EP0235115B1 EP0235115B1 EP19870890004 EP87890004A EP0235115B1 EP 0235115 B1 EP0235115 B1 EP 0235115B1 EP 19870890004 EP19870890004 EP 19870890004 EP 87890004 A EP87890004 A EP 87890004A EP 0235115 B1 EP0235115 B1 EP 0235115B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ferrite ring
- resonant circuit
- proximity switch
- target
- cylindrical 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
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
- F42C13/00—Proximity fuzes; Fuzes for remote detonation
- F42C13/003—Proximity fuzes; Fuzes for remote detonation operated by variations in electrostatic field
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B23/00—Land mines ; Land torpedoes
- F42B23/04—Land mines ; Land torpedoes anti-vehicle, e.g. anti-aircraft or anti tank
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
- F42C13/00—Proximity fuzes; Fuzes for remote detonation
- F42C13/06—Proximity fuzes; Fuzes for remote detonation operated by sound waves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
- F42C13/00—Proximity fuzes; Fuzes for remote detonation
- F42C13/08—Proximity fuzes; Fuzes for remote detonation operated by variations in magnetic field
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
- F42C14/00—Mechanical fuzes characterised by the ammunition class or type
- F42C14/08—Mechanical fuzes characterised by the ammunition class or type for land mines
Definitions
- the invention relates to a proximity switch for igniting a shaped charge, in particular for a mine, using an electrical resonant circuit with a solenoid.
- proximity switches for detonating the explosive charge, these proximity switches being controlled by sound waves or changes in a magnetic field.
- Proximity switches with a particularly simple design and reliable function are obtained on the basis of resonant circuits that are detuned by the approaching vehicle and trigger the mine to ignite.
- Such proximity switches based on electrical resonant circuits cannot, however, be used to ignite shaped charges because the metallic hollow body in front of the explosive charge causes excessive damping of the resonant circuit due to the eddy currents induced in the hollow body.
- the invention is therefore based on the object to avoid this deficiency and to provide a proximity switch for igniting a shaped charge on the basis of an electrical resonant circuit, the responsiveness of which is not impaired by the hollow metal body of the shaped charge.
- the invention solves the stated problem in that the upstream of the metallic hollow body of the shaped charge, with an electrostatic shield ver seen solenoid of the resonant circuit on its side facing away from the target with a coaxial ferrite ring is connected and electrically insulated.
- the field lines of the electromagnetic field excited by the cylindrical coil penetrate the ferrite ring essentially radially due to the magnetic resistance of the ferrite ring, which is substantially lower than air, so that a disturbing field propagation in the area of the metallic hollow body of the shaped charge is prevented. Therefore, no eddy currents will be induced in the hollow metal body of the shaped charge.
- the ferrite ring can be produced from a material of high permeability and a comparatively large specific ohmic resistance, the eddy currents induced by the coil field in the ferrite core can be reduced to an allowable level without endangering the functionality of the proximity switch.
- the proximity switch should only respond when the target is at a comparatively small distance from the shaped charge, and a corresponding spreading of the coil field in the direction of the target by the ferrite ring on the side of the coil remote from the target cannot be prevented.
- the ferrite ring can be connected to the cylindrical coil of the resonant circuit in various ways, since it is only a matter of a displacement-resistant assignment of the ferrite ring to the cylindrical coil. Particularly advantageous design conditions are ensured, however, in that the ferrite ring is connected to the cylindrical coil of the resonant circuit by an electrically insulating adhesive layer.
- This adhesive not only makes other connecting means which may influence the formation of the coil field superfluous, but also provides effective electrical insulation between the solenoid or its electrostatic shielding and the ferrite ring.
- the solenoid with the ferrite ring can first be inserted into a plastic housing, which is then filled with the potting compound, which preferably consists of a permanently elastic material is formed.
- the shaped charge shown consists of a plastic housing 1, which is filled with explosive 2 and is terminated on the target side by a metallic hollow body 3, usually in the form of a hollow cone.
- the housing 1 forms an annular receptacle 4 for the solenoid 5 of a resonant circuit, not shown, of a proximity switch for igniting the shaped charge.
- This solenoid 5 is provided with an electrostatic shield 6 and connected on its side facing away from the target with a coaxial ferrite ring 7 fixed against displacement.
- An adhesive layer 8 is used to connect the ferrite ring 7 and the solenoid 5, which at the same time provides electrical insulation between the ferrite ring 7 and the electrostatic shield 6 or the solenoid 5.
- Cylinder coil 5 of the proximity switch is embedded within the annular receptacle 4 of the plastic housing 1 in a permanently elastic potting compound 9, which ensures that the cylinder coil 5 is held well with the ferrite ring 7.
- the ferrite ring 7 Since the ferrite ring 7 has a very small magnetic resistance to air, the field lines of the electromagnetic field excited by the solenoid 5 of the resonant circuit close via this ferrite ring 7, so that the metallic hollow body 3 of the shaped charge lies in an essentially field-free space. In the metallic hollow body 3, therefore, no eddy currents which dampen the resonant circuit in an impermissible manner can be induced.
- the induction of eddy currents in the ferrite ring 7 can be limited to an admissible value without difficulty because the material for the ferrite ring 7 can have a high permeability and a comparatively large specific ohmic resistance, which prevents the induction of larger eddy currents and thus the damping of the resonant circuit in an acceptable area.
- a sufficiently large coil field can thus form in the direction of the target, which is changed by the target when the target approaches, so that the associated detuning of the resonant circuit of the proximity switch for igniting the shaped charge can be exploited.
- proximity switches according to the invention can be used with particular advantage in the case of shaped charges for mines, the invention is of course not restricted to this application. Missiles, grenades and projectiles with shaped charges can also be provided with such proximity switches if the shaped charge needs to be detonated at a certain distance from the target.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Switches That Are Operated By Magnetic Or Electric Fields (AREA)
Claims (3)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT189/86 | 1986-01-28 | ||
AT18986A AT384298B (de) | 1986-01-28 | 1986-01-28 | Annaeherungsschalter zum zuenden einer hohlladung, insbesondere fuer eine mine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0235115A1 EP0235115A1 (fr) | 1987-09-02 |
EP0235115B1 true EP0235115B1 (fr) | 1989-10-04 |
Family
ID=3483840
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19870890004 Expired EP0235115B1 (fr) | 1986-01-28 | 1987-01-14 | Fusée de proximité pour la mise à feu d'une charge creuse, destinée en particulier à une mine |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0235115B1 (fr) |
AT (1) | AT384298B (fr) |
DE (1) | DE3760696D1 (fr) |
ES (1) | ES2011303B3 (fr) |
GR (1) | GR3000196T3 (fr) |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR864811A (fr) * | 1939-12-21 | 1941-05-06 | Centre Nat Rech Scient | Fusée sonore |
US3347165A (en) * | 1958-10-28 | 1967-10-17 | Cletus A Kessler | Flux guide for a magnetic fuze |
FR1317270A (fr) * | 1961-12-26 | 1963-02-08 | Mine à pose rapide | |
FR1534655A (fr) * | 1963-07-22 | 1968-08-02 | Perfectionnement aux mines dites à charge formée à mise à feu magnétique | |
US3653351A (en) * | 1969-07-16 | 1972-04-04 | Us Navy | Magnetic detector |
FR2071823A5 (fr) * | 1969-11-04 | 1971-09-17 | Messerschmitt Boelkow Blohm | |
FR2086528A5 (fr) * | 1970-04-01 | 1971-12-31 | Clausin Pierre | |
FR2358635A1 (fr) * | 1976-07-15 | 1978-02-10 | Haut Rhin Manufacture Machines | Detecteur de proximite pour projectile explosif a charge creuse ou formee |
US4206707A (en) * | 1977-11-22 | 1980-06-10 | General Dynamics Corportation | Electromagnetic hazard suppression techniques |
-
1986
- 1986-01-28 AT AT18986A patent/AT384298B/de not_active IP Right Cessation
-
1987
- 1987-01-14 ES ES87890004T patent/ES2011303B3/es not_active Expired - Lifetime
- 1987-01-14 EP EP19870890004 patent/EP0235115B1/fr not_active Expired
- 1987-01-14 DE DE8787890004T patent/DE3760696D1/de not_active Expired
-
1989
- 1989-10-25 GR GR89400215T patent/GR3000196T3/el unknown
Also Published As
Publication number | Publication date |
---|---|
ES2011303B3 (es) | 1990-01-01 |
EP0235115A1 (fr) | 1987-09-02 |
ATA18986A (de) | 1987-03-15 |
DE3760696D1 (en) | 1989-11-09 |
AT384298B (de) | 1987-10-27 |
GR3000196T3 (en) | 1990-12-31 |
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