EP0845097B1 - Minenräumspule und minenräumgerät - Google Patents

Minenräumspule und minenräumgerät Download PDF

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Publication number
EP0845097B1
EP0845097B1 EP97930558A EP97930558A EP0845097B1 EP 0845097 B1 EP0845097 B1 EP 0845097B1 EP 97930558 A EP97930558 A EP 97930558A EP 97930558 A EP97930558 A EP 97930558A EP 0845097 B1 EP0845097 B1 EP 0845097B1
Authority
EP
European Patent Office
Prior art keywords
coil
demining
coils
core
vehicle
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
EP97930558A
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English (en)
French (fr)
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EP0845097A1 (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
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 Giat Industries SA filed Critical Giat Industries SA
Publication of EP0845097A1 publication Critical patent/EP0845097A1/de
Application granted granted Critical
Publication of EP0845097B1 publication Critical patent/EP0845097B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/20—Electromagnets; Actuators including electromagnets without armatures
    • 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
    • F41H11/16—Self-propelled mine-clearing vehicles; Mine-clearing devices attachable to vehicles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F3/00—Cores, Yokes, or armatures
    • H01F3/02—Cores, Yokes, or armatures made from sheets

Definitions

  • the technical field of the invention is that of coils used in mine clearance operations.
  • Known devices generally use coils substantially flat and devoid of core.
  • this technology allows to place the coils directly on the glacis of a tank by limiting disturbances of the magnetic field that the mass of the tank could generate.
  • the magnetic field generated is oriented essentially along a single axis (the axis of the coil) which decreases the effectiveness of the demining device.
  • the subject of the invention is a demining coil equipped with a magnetic core, intended in particular to be secured to a demining vehicle, reel characterized in what the core is of the laminated or grooved type to limit the eddy currents and in that the ratio of the length over the largest transverse dimension of the coil core is greater than or equal to 4.
  • the material of the magnetic core will have preferably a relative permeability greater than or equal to 100 and a saturation induction greater than or equal to 2 you're here.
  • the demining coil may be surrounded by a case protection made of non-magnetic material and not driver.
  • the coil may include a connecting means for allow its fixation on a support placed to a part front of a demining vehicle, the connecting means being shaped so as to allow an angular displacement of the axis of the coil relative to the support.
  • connection means may include a base having at least two fixing systems separated by a part made of flexible synthetic material.
  • the means of connection may include at least two elastic wedges, arranged between the coil and the protective case, shims which ensure flexible positioning of the coil substantially at the axis of the case.
  • the means of link may include at least three rings concentric, pivots being provided between a ring intermediate and the other two rings, pivots positioned so as to allow the pivoting of an internal ring carrying the coil along at least two orthogonal axes.
  • the invention also relates to a device for mine clearance using at least three coils and characterized in that the coils are fixed on a support placed at a front part of the demining vehicle, the axes of the coils being distributed so as to form two at two at least two non-parallel planes.
  • the coils are fixed on a support placed at a front part of the vehicle of demining, and the axes of the coils are distributed along at least two different directions.
  • the axes of the coils can be distributed according to at least three different directions.
  • a demining coil 1 according to the invention is intended to be fixed to a part front of a demining vehicle (not shown).
  • This coil includes a winding 2 of a wire conductor 3, winding comprising a number of concentric layers. This winding is carried out around of a magnetic core 4. The winding is connected by connections not shown to control electronics, for example of the type described by the patent FR2701105.
  • the nucleus 4 has a parallelepiped shape which has been chosen for manufacturing facilities. He is flaky consisting of a stack of soft iron sheets isolated from each other by an oxide layer. The different oxide layers act as insulation electric which limits the action of currents of Foucault.
  • Induction to saturation of the core material must also be as high as possible in order to limit the non-linearities of the magnetic induction that is created depending on the current. This optimizes the yield.
  • Wire 3 of the winding will be copper wire.
  • the coil is dimensioned so that its core has a ratio of its length L to its largest transverse dimension (here the diagonal of the section square) greater than 4.
  • the field projected out of the coil will be all the more important as the core of the coil will long, this is because the field lines get close between the two North (N) and South (S) poles of a coil (see fig 4a). They will close much more away from the coil if it or its core is long.
  • the value of the coil inductor must stay relatively small to make it possible to inject current into it. Now the value of the self increases with diameter.
  • the essential parameter for the definition of a coil effective is therefore the L / D ratio (length over diameter or length over greatest transverse dimension for a parallelepipedic nucleus).
  • the coil is arranged inside a case of protection 5 made of a non-magnetic material and not conductor (e.g. plastic or coiled filamentary) and closed by covers 6a, 6b. This case protects the coil against external aggressions.
  • a case of protection 5 made of a non-magnetic material and not conductor (e.g. plastic or coiled filamentary) and closed by covers 6a, 6b. This case protects the coil against external aggressions.
  • This coil carries at one of its ends a connecting means 15 which is intended to allow its fixing on a support placed at a front part of a vehicle demining.
  • This connecting means is formed by a base having at least two fixing systems 16a, 16b (here rods threaded) separated by a part 17 made of a material flexible synthetic (eg rubber).
  • Each threaded rod 16a, 16b is integral with a plate metal on which the intermediate part is molded 17.
  • connection means is flexible and allows a angular displacement of the axis 24 of the coil 1 by support.
  • the coil will subject to vibrations which will modify randomly the spatial components of the field magnetic generated.
  • a coil according to the invention having a winding of 150 m of wire and having a plus large section dimension (D) of 80 mm for a length L of 550 mm, has a mass of 18 kg. She creates at a point given a magnetic field of intensity double that of generated by a known type air coil having the same number of turns and whose mass is 35 kg.
  • Figures 2a and 2b show a second mode of production of a coil according to the invention
  • This embodiment differs from the previous one in that the core 4 carrying the wire winding 2 is positioned substantially coaxial to case 5 by two shims elastic bands 18a and 18b which thus form the connecting means flexible coil.
  • the shims 18a, 18b are produced for example in rubber.
  • Each wedge has a central part annular 19 which is positioned at a rod cylindrical 20 integral with the laminated core 4.
  • Each end of the core 4 carries such a rod 20 which may be made of plastic (non-magnetic) and fixed to the core 4 for example by thread.
  • the central part 19 of the wedge is connected to a peripheral part 21 by three arms 22.
  • the thickness and the shape of the arms 22 are determined so as to give the bond the desired flexibility.
  • peripheral part 21 of each wedge is adjusted to the internal surface of the case 5.
  • the shims 18a, 18b are fixed to the rods 20 and to the case 5 for example by gluing.
  • the case 5 itself will be fixed to the vehicle by means of a threaded rod 23 integral with the cover 6a.
  • the advantage of this embodiment is that the coil 1 is suspended by its two ends at the level of the axis 24 of the protective case 5. It can therefore be animated by more complex vibration movements than those allowed by the previous embodiment.
  • Figures 3a and 3b show a third mode of production of a coil according to the invention.
  • the coil is linked to the case 5 (which allows its attachment to the carrier vehicle) via a compass assembly which includes a outer ring 25, an intermediate ring 26 and a ring internal 27.
  • the intermediate ring 26 is linked to the ring outer 25 by two pivots 28a, 28b (shown schematically) which allow a rotation of the ring intermediate to the outer ring around a axis 29 perpendicular to the axis of the case.
  • the intermediate ring 26 is linked to the internal ring 27 by two other pivots 30a, 30b (shown schematically) which allow a rotation of the ring internal 27 relative to the intermediate ring 26 around an axis 31 perpendicular to the axis of the case and to the axis 29.
  • the coil is integral with the inner ring 27.
  • the axis of the reel When moving the carrier vehicle, the axis of the reel constantly changes orientation which varies the magnetic field randomly and improves the effectiveness of mine clearance.
  • Stops may be provided to adjust the maximum values of the angular deflections of the axis 24.
  • Figure 4 shows a demining device according to prior art.
  • This device comprises two coils 7a, 7b arranged on a bar 8 secured to a front part of a vehicle 9.
  • the coils are arranged so that their axes are substantially vertical (here perpendicular to the plan of the figure).
  • a coil generates a field magnetic whose vector is tangent to lines equipotentials which are substantially parallel to the axis of the coil inside it and which close outside the coil.
  • Figure 4a shows schematically (for the record) a coil 11 in longitudinal section with the field lines 10 that she creates and some B magnetic field vectors positioned on the field lines.
  • the minesweeper coils having their axes substantially vertical, they generate in front of the demining vehicle a magnetic field which has a vertical component and a horizontal component.
  • the field seen at a point A located in front of the Minesweeper is a composition of the field created by the two coils. This field therefore has a vertical component and two horizontal components (represented by the BH1 and BH2 notations).
  • a device for demining according to a first embodiment of the invention comprises four coils 1 of the type of those described with reference to Figures la and 1b. These coils have their axes substantially vertical and are arranged along two pairs 12a, 12b.
  • Each pair of coils is attached to a wing 13a, 13b of a support 14 secured to the vehicle 9.
  • the wings 13a and 13b are not coplanar and therefore form an angle ⁇ .
  • a blade will be adopted as support 14 which is usually used on demining vehicles.
  • a point A placed in front of the vehicle 9 sees a magnetic field with two components horizontal BH1, BH2, a point B arranged laterally at vehicle also sees a magnetic field with two horizontal components BH4 and BH5.
  • Each point therefore sees two different coils located at distances which are of the same order of magnitude, these coils generate field lines with slightly different shapes, their actions combine.
  • Figure 6 shows another embodiment of the demining device according to the invention in which the support 14 also has two side wings 13a and 13b forming an angle.
  • two coils 1a and 1b are oriented with their vertical axis, two coils 1c and 1d have their horizontal axis, and the axis of the coil 1c is perpendicular to that of the coil 1d.
  • Each coil generating a field at ground level magnetic whose maximum intensity component is substantially that which is parallel to the axis of the coil, we are assured with the configuration of figure 6 to generate a resulting magnetic field which has components along the three orthogonal directions.
  • Figures 7a and 7b show another mode of embodiment of the invention in which in order to distribute the intensity of the magnetic field in three directions orthogonal we have arranged on the support 14 two coils 1a and 1b with vertical axis and two coils 1c and 1d whose axes respective D4 and D5 form an angle, both with the vertical (angle ⁇ visible in Figure 7b), and with the direction ⁇ of vehicle progression (angle ⁇ visible at Figure 7a).
  • the four coils may also be fixed to a flat support, the double inclination ⁇ and ⁇ ensuring for any point in space surrounding the vehicle the presence of three components of the magnetic field.
  • the flexible connection means can make it possible not to use for example that coils having practically the same orientation.
  • Figure 8 shows a support formed by a clearing blade which has two wings 13a, 13b and on which are fixed two coils 1 to parallel axes. These coils are linked to the support by a flexible connection means of the type for example of Figures 1, 2 or 3.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Current-Collector Devices For Electrically Propelled Vehicles (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
  • Burglar Alarm Systems (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Cleaning In General (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
  • Control Of Vehicles With Linear Motors And Vehicles That Are Magnetically Levitated (AREA)
  • Measuring Magnetic Variables (AREA)

Claims (11)

  1. Minenräumungsspule (1) mit einem Magnetkern (4), die insbesondere dazu dient, mit einem Minenräumfahrzeug verbunden zu werden, dadurch gekennzeichnet, dass der Kern (4) blättrig oder gerillt ist, um die Foucaultströme zu begrenzen, und das Längenverhältnis auf der größten querlaufenden Ausdehnung des Spulenkerns größer oder gleich 4 ist.
  2. Minenräumungsspule nach Anspruch 1, dadurch gekennzeichnet, dass das Grundmaterial des Magnetkerns (4) eine relative Permeabilität größer oder gleich 100 hat.
  3. Minenräumungsspule nach Anspruch 2, dadurch gekennzeichnet, dass das Grundmaterial des Magnetkerns (4) eine gesättigte Induktion größer oder gleich 2 Tesla hat.
  4. Minenräumungsspule nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass sie mit einer Schutzhülle (5) aus einem nicht magnetischen und nicht leitenden Material versehen wird.
  5. Minenräumungsspule nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass sie ein Verbindungsmittel (15) enthält, mit dem sie auf einem Träger im vorderen Bereich eines Minenräumfahrzeugs angebracht wird, das Verbindungsmittel ist so angepasst, dass es die Spulenachse im Verhältnis zum Träger winklig verschieben kann.
  6. Minenräumungsspule nach Anspruch 5, dadurch gekennzeichnet, dass das Verbindungsmittel einen Sockel trägt, der mindestens zwei durch einen Bereich (17) aus weichem Synthetikmaterial getrennte Befestigungssysteme (16a, 16b) darstellt.
  7. Minenräumsystem nach Ansprüche 4 und 5, dadurch gekennzeichnet, dass das Verbindungsmittel mindestens zwei elastische Unterlagen (18a, 18b) hat, die zwischen der Spule (1) und der Schutzhülle (5) angebracht sind und für eine weiche Positionierung der Spule etwa auf Höhe der Hüllenachse sorgen.
  8. Minenräumungsspule nach Anspruch 5, dadurch gekennzeichnet, dass das Verbindungsmittel mindestens drei konzentrische Ringe (25, 26, 27) hat, zwischen einem Zwischenring (26) und den beiden anderen Ringen sind Zapfen (28a, 28b, 30a, 30b) so angebracht, dass sich ein innerer Ring (27), der die Spule (1) trägt, auf mindestens zwei rechtwinkligen Achsen (29, 31) drehen kann.
  9. Minenräumsystem, das mindestens drei Spulen einsetzt, nach irgendeinem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass die Spulen (1) auf einem Träger (14) im vorderen Bereich des Minenfahrzeugs befestigt sind, die Spulenachsen sind so verteilt, dass sie paarweise mindestens zwei nicht parallele Ebenen bilden.
  10. Minenräumsystem, das mindestens drei Spulen einsetzt, nach irgendeinem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass die Spulen (1) auf einem Träger (14) im vorderen Bereich des Minenräumfahrzeugs befestigt sind, die Spulenachsen sind auf mindestens zwei verschiedene Richtungen verteilt.
  11. Minenräumsystem nach Anspruch 10, dadurch gekennzeichnet, dass die Spulenachsen auf mindestens drei verschiedene Richtungen verteilt sind.
EP97930558A 1996-06-19 1997-06-19 Minenräumspule und minenräumgerät Expired - Lifetime EP0845097B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9607644A FR2750204B1 (fr) 1996-06-19 1996-06-19 Bobine de deminage et dispositif de deminage en faisant application
FR9607644 1996-06-19
PCT/FR1997/001105 WO1997048965A1 (fr) 1996-06-19 1997-06-19 Bobine de deminage et dispositif de deminage en faisant application

Publications (2)

Publication Number Publication Date
EP0845097A1 EP0845097A1 (de) 1998-06-03
EP0845097B1 true EP0845097B1 (de) 2001-09-12

Family

ID=9493229

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97930558A Expired - Lifetime EP0845097B1 (de) 1996-06-19 1997-06-19 Minenräumspule und minenräumgerät

Country Status (11)

Country Link
US (1) US6002321A (de)
EP (1) EP0845097B1 (de)
AT (1) ATE205593T1 (de)
CA (1) CA2227886C (de)
DE (1) DE69706633T2 (de)
DK (1) DK0845097T3 (de)
ES (1) ES2160962T3 (de)
FR (1) FR2750204B1 (de)
GR (1) GR3036912T3 (de)
WO (1) WO1997048965A1 (de)
ZA (1) ZA975478B (de)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6636137B1 (en) 1996-06-05 2003-10-21 L.H. Carbide Corporation Ignition coil assembly
US6163949A (en) * 1996-06-05 2000-12-26 L.H. Carbide Corporation Method for manufacturing long, slender lamina stack from nonuniform laminae
US6195875B1 (en) 1996-06-05 2001-03-06 L.H. Carbide Corporation Apparatus for manufacturing long, slender lamina stacks from nonuniform laminae
FR2849178B1 (fr) 2002-12-18 2007-04-27 Giat Ind Sa Dispositif tractable de deminage en surface et de marquage de l'itineraire demine
FR2851037B1 (fr) * 2003-02-06 2005-03-18 Giat Ind Sa Dispositif de deminage repliable
FR2867634B1 (fr) 2004-03-12 2008-07-04 Giat Ind Sa Procede de transmission de donnees et dispositif mettant en oeuvre un tel procede
US7987760B1 (en) * 2005-05-03 2011-08-02 Applied Energetics, Inc Systems and methods for igniting explosives
FR2899395B1 (fr) 2006-04-03 2011-05-27 Giat Ind Sa Dispositif de protection d'un circuit de puissance oscillant
EP1983295B1 (de) * 2007-04-19 2019-01-30 NEXTER Systems Schutzvorrichtung für einen Schwingkreis zur Leistungsübertragung
FR2922027B1 (fr) 2007-10-08 2011-04-29 Nexter Systems Dispositif de test du fonctionnement d'un generateur de champ magnetique

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3417382A (en) * 1964-09-01 1968-12-17 Sylvania Electric Prod Ferrite core having different regions of varying permeability
US5001485A (en) * 1968-12-20 1991-03-19 The United States Of America, As Represented By The Secretary Of The Navy Magnetic field generator
US3707913A (en) * 1969-07-31 1973-01-02 W Lee Pulsed-energy detonation system for electro explosive devices
US4993325A (en) * 1970-06-02 1991-02-19 The United States Of America As Represented By The Secretary Of The Navy Magnetic field generator
DE3424231A1 (de) * 1984-06-30 1986-01-09 Bundesrepublik Deutschland, vertreten durch den Bundesminister der Verteidigung, dieser vertreten durch den Präsidenten des Bundesamtes für Wehrtechnik und Beschaffung, 5400 Koblenz Minenschutz fuer landfahrzeuge
DE3444037A1 (de) * 1984-12-03 1986-06-12 Honeywell Gmbh, 6050 Offenbach Raeumeinrichtung fuer minen mit magnetsensor
IL102256A (en) * 1992-06-18 1996-03-31 Israel Aircraft Ind Ltd Remote blasting means, especially for neutralizing vehicles
FR2701105B1 (fr) * 1993-02-01 1995-04-14 Giat Ind Sa Dispositif de déminage.

Also Published As

Publication number Publication date
ATE205593T1 (de) 2001-09-15
FR2750204A1 (fr) 1997-12-26
DE69706633T2 (de) 2002-07-04
CA2227886C (fr) 2006-01-10
EP0845097A1 (de) 1998-06-03
ZA975478B (en) 1998-04-06
ES2160962T3 (es) 2001-11-16
FR2750204B1 (fr) 1998-08-07
DK0845097T3 (da) 2002-01-07
US6002321A (en) 1999-12-14
WO1997048965A1 (fr) 1997-12-24
GR3036912T3 (en) 2002-01-31
DE69706633D1 (de) 2001-10-18
CA2227886A1 (fr) 1997-12-24

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