WO1997048965A1 - Bobine de deminage et dispositif de deminage en faisant application - Google Patents
Bobine de deminage et dispositif de deminage en faisant application Download PDFInfo
- Publication number
- WO1997048965A1 WO1997048965A1 PCT/FR1997/001105 FR9701105W WO9748965A1 WO 1997048965 A1 WO1997048965 A1 WO 1997048965A1 FR 9701105 W FR9701105 W FR 9701105W WO 9748965 A1 WO9748965 A1 WO 9748965A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- coil
- demining
- coils
- vehicle
- connecting means
- Prior art date
Links
Classifications
-
- 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 demining operations.
- Demining devices which use at least one induction coil supplied by an electrical circuit are known in particular from the patents DE3444037 and FR2701105.
- Known devices generally use coils which are substantially flat and devoid of a core.
- this technology makes it possible to place the coils directly on the glacis of a tank by limiting the disturbances of the magnetic field that the mass of the tank could generate.
- the main drawback of these coils is that they are very heavy (the usual mass of a demining coil is 80 kg), and the field generated remains of relatively small amplitude (of the order of 5 micro tesla at 5 m ).
- the magnetic field generated is oriented essentially along a single axis (the axis of the coil), which reduces the effectiveness of the demining device.
- the subject of the invention is a demining coil intended in particular to be made integral with a demining vehicle, coil characterized in that it comprises a laminated magnetic core or groove to limit the eddy currents and in that the ratio the length over the largest transverse dimension of the coil core is greater than or equal to 4.
- the material constituting the magnetic core will preferably have a relative permeability greater than or equal to 100 and an induction at saturation greater than or equal to 2 you're here.
- the demining coil may be surrounded by a protective case made of non-magnetic and non-conductive material.
- the coil may include a connecting means intended to allow its attachment to a support placed at a front part of a demining vehicle, the connecting means being shaped so as to allow angular displacement of the axis of the coil relative to the support.
- the connecting means may include a base having at least two fixing systems separated by a part made of flexible synthetic material.
- the connecting means may comprise at least two elastic shims, disposed between the coil and the protective case, shims which ensure flexible positioning of the coil substantially at the axis of the case .
- connection means may comprise at least three concentric rings, pivots being provided between an intermediate ring and the other two rings, pivots positioned so as to allow the pivoting of an internal ring carrying the following coil at least two orthogonal axes.
- the invention also relates to a demining device 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 by two at least two non-parallel planes.
- the coils are fixed on a support placed at a front part of the demining vehicle, and the axes of the coils are distributed in at least two different directions.
- the axes of the coils can be distributed in at least three different directions.
- FIG. 1a shows in longitudinal section a demining coil according to a first embodiment of the invention
- FIG. 1b is a view of this coil in cross section along the plane marked in AA in FIG.
- FIG. 2a represents in longitudinal section a coil according to a second embodiment of the invention
- FIG. 2b is a view of this coil in cross section along the plane marked in BB in FIG. 2a,
- FIG. 3a represents in longitudinal section a coil according to a third embodiment of the invention
- FIG. 3b is a view of this coil in cross section along the plane marked in CC in FIG. 3a,
- FIG. 4 schematically represents a demining device according to the prior art
- FIG. 4a schematically shows the orientation of the field lines around an induction coil
- FIG. 5 schematically represents a demining device according to a first embodiment of the invention
- FIG. 6 schematically represents a demining device according to a second embodiment of the invention
- FIGS. 7a and 7b schematically represent a demining device according to a fourth embodiment of the invention, FIG. 7b being a view of the device in the direction marked F in FIG. 7a,
- FIG. 8 schematically represents a demining device according to a variant of the invention.
- a demining coil 1 according to the invention is intended to be fixed to a front part of a demining vehicle (not shown).
- This coil comprises a winding 2 of a conducting wire 3, winding comprising a number of concentric layers. This winding is produced around a magnetic core 4.
- the winding is connected by connections not shown to control electronics, for example of the type described by patent FR2701105.
- the core 4 has a parallelepiped shape which has been chosen for manufacturing facilities. It is laminated by being made up of a stack of soft iron sheets isolated from each other by an oxide layer. The different oxide layers play the role of electrical insulator which limits the action of eddy currents. As a variant, it is possible to use a core carrying longitudinal grooves penetrating radially into the core. These grooves also make it possible to limit the eddy currents.
- the sheet material will be chosen such that it has a relative permeability ⁇ r greater than or equal to 100. This limit value is sufficient because the magnetic induction created by the coil at 4 m no longer believes with ⁇ r when it exceeds 100.
- the saturation induction of the core material (maximum magnetic induction allowed by its material) must also be as high as possible in order to limit the non-linearities of the magnetic induction which is created as a function of the current. This optimizes the yield.
- the wire 3 of the winding will be a 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 square section) greater than 4.
- the field projected out of the coil will be all the more important as the core of the coil will be long, this is due to the fact that the field lines close between the two poles North (N) and South (S) of a coil (see fig 4a). They will close much further from the coil if it or its core is long.
- the value of the coil inductance must remain relatively low so that it is possible to inject current into it. Now the value of the self increases with the diameter.
- the essential parameter for the definition of an effective coil is therefore the L / D ratio (length over diameter or length over larger transverse dimension for a parallelepipedic nucleus).
- the coil is arranged inside a protective case 5 made of a non-magnetic and non-conductive material (for example plastic or in filament wound) and closed by covers ⁇ a, 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 attachment to a support placed at a front part of a demining vehicle.
- This connecting means is formed by a base having at least two fixing systems 16a, l ⁇ b (here threaded rods) separated by a part 17 made of a flexible synthetic material (for example rubber).
- Each threaded rod 16a, 16b is integral with a metal plate on which the intermediate part is molded 17.
- the connecting means is flexible and it allows angular displacement of the axis 24 of the coil 1 relative to the support.
- the gearbox will be subjected to vibrations which will have the effect of randomly modifying the spatial components of the magnetic field generated.
- a coil according to the invention comprising a winding of 150 m of wire and having a larger section dimension (D) of 80 mm for a length L of 550 mm, has a mass of 18 kg. It creates at a given point a magnetic field of intensity double that generated by a known type air coil having the same number of turns and whose mass is 35 kg.
- FIGS. 2a and 2b show a second embodiment 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 coaxially with the case 5 by two elastic blocks 18a and 18b which thus form the flexible connection means of the coil.
- the shims 18a, 18b are made for example of rubber.
- Each wedge has an annular central part 19 which is positioned at the level of a cylindrical rod 20 integral with the laminated core 4.
- Each end of the core 4 carries such a rod 20 which can 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 connection the desired flexibility.
- peripheral part 21 of each wedge is adjusted to the internal surface of the case 5.
- the wedges 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 secured to the cover ⁇ a.
- Figures 3a and 3b show a third embodiment of a coil according to the invention.
- the coil is linked to the case 5 (which allows its attachment to the carrier vehicle) by means of a compass assembly which comprises an outer ring 25, an intermediate ring 26 and a ring internal 27.
- the intermediate ring 26 is linked to the external ring 25 by two pivots 28a, 28b (shown diagrammatically) which allow a rotation of the intermediate ring relative to the external ring about an 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 diagrammatically) which allow rotation of the internal ring 27 relative to the intermediate ring 26 about an axis 31 perpendicular to the axis of the case and has axis 29.
- the coil is integral with the inner ring 27. This arrangement results in a possibility of pivoting of the axis 24 of the coil around the axes 29 and 31.
- the axis of the coil constantly changes d 'orientation which varies the magnetic field randomly and improves the effectiveness of mine clearance.
- FIG. 4 shows a demining device according to the 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 plane of the figure).
- a coil In a known manner, a coil generates a magnetic field whose vector is tangent to equipotential lines which are substantially parallel to the axis of the coil inside the latter and which close on the outside of the coil. .
- FIG. 4a thus schematizes (for the record) a coil 11 in longitudinal section with the field lines 10 which it creates and some magnetic field vectors B positioned on the field lines.
- the minesweeper coils having their axes substantially vertical, they generate a magnetic field in front of the mine clearance vehicle 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 notations BH1 and BH2).
- the field seen at a point B located laterally at the minesweeper sees only one horizontal component (BH3), and which corresponds practically to the only action of the nearest coil (the attenuation of the field generated by a coil being proportional to the cube of the distance).
- a demining device comprises four coils 1 of the type described with reference to Figures la and lb. These coils have their substantially vertical axes and are arranged in two pairs 12a, 12b. Each pair of coils is secured 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 clearing blade which is usually used on demining vehicles will be adopted as support 14.
- FIG. 6 shows another embodiment of the demining device according to the invention in which the support 14 also comprises two lateral wings 13a and 13b forming an angle.
- two coils la and lb are oriented with their vertical axis, two coils le and ld have their horizontal axis, and the axis of the coil is perpendicular to that of the coil ld.
- Each coil generating at ground level a magnetic field whose maximum intensity component is substantially that which is parallel to the axis of the coil, it is ensured with the configuration of Figure 6 to generate a resulting magnetic field which components along the three orthogonal directions. 'this results in better mine clearance efficiency.
- FIGS. 7a and 7b show another embodiment of the invention in which, in order to distribute the intensity of the magnetic field in three orthogonal directions, two coils 1a and 1b with vertical axis and two coils are arranged on the support 14 and ld whose respective axes D4 and D5 form an angle, both with the vertical (angle ⁇ visible in FIG. 7b), and with the direction ⁇ of progression of the vehicle (angle ⁇ visible in FIG. 7a).
- the four coils can also be fixed to a flat support, the double inclination ⁇ and ⁇ ensuring for any point in the space surrounding the vehicle the presence of three components of the magnetic field.
- FIGS. 5 to 7 All the embodiments of the invention shown in FIGS. 5 to 7 can be implemented with coils fixed to the support 14 in a rigid manner.
- the flexible connection means can make it possible, for example, to use only coils having practically the same orientation .
- Figure 8 shows a support formed by a clearing blade which comprises two ai'les 13a, 13b and on which are fixed two coils 1 with parallel axes. These coils are linked to the support by a flexible connection means of the type for example of that of FIGS. 1, 2 or 3.
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Coils Or Transformers For Communication (AREA)
- Current-Collector Devices For Electrically Propelled Vehicles (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
- Geophysics And Detection Of Objects (AREA)
- Burglar Alarm Systems (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
- Measuring Magnetic Variables (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
- Cleaning In General (AREA)
- Control Of Vehicles With Linear Motors And Vehicles That Are Magnetically Levitated (AREA)
Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002227886A CA2227886C (fr) | 1996-06-19 | 1997-06-19 | Bobine de deminage et dispositif de deminage en faisant application |
AT97930558T ATE205593T1 (de) | 1996-06-19 | 1997-06-19 | Minenräumspule und minenräumgerät |
DK97930558T DK0845097T3 (da) | 1996-06-19 | 1997-06-19 | Minerydningsspole og minerydningsindretning, der benytter sig heraf |
US09/000,180 US6002321A (en) | 1996-06-17 | 1997-06-19 | Mine-clearing coil and device using same |
DE69706633T DE69706633T2 (de) | 1996-06-19 | 1997-06-19 | Minenräumspule und minenräumgerät |
EP97930558A EP0845097B1 (fr) | 1996-06-19 | 1997-06-19 | Bobine de deminage et dispositif de deminage en faisant application |
GR20010401786T GR3036912T3 (en) | 1996-06-19 | 2001-10-17 | Mine-clearing coil and device using same |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR96/07644 | 1996-06-17 | ||
FR9607644A FR2750204B1 (fr) | 1996-06-19 | 1996-06-19 | Bobine de deminage et dispositif de deminage en faisant application |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1997048965A1 true WO1997048965A1 (fr) | 1997-12-24 |
Family
ID=9493229
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR1997/001105 WO1997048965A1 (fr) | 1996-06-17 | 1997-06-19 | Bobine de deminage et dispositif de deminage en faisant application |
Country Status (11)
Country | Link |
---|---|
US (1) | US6002321A (fr) |
EP (1) | EP0845097B1 (fr) |
AT (1) | ATE205593T1 (fr) |
CA (1) | CA2227886C (fr) |
DE (1) | DE69706633T2 (fr) |
DK (1) | DK0845097T3 (fr) |
ES (1) | ES2160962T3 (fr) |
FR (1) | FR2750204B1 (fr) |
GR (1) | GR3036912T3 (fr) |
WO (1) | WO1997048965A1 (fr) |
ZA (1) | ZA975478B (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1983295A1 (fr) * | 2007-04-19 | 2008-10-22 | NEXTER Systems | Dispositif de protection d'un circuit de puissance oscillant |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6636137B1 (en) | 1996-06-05 | 2003-10-21 | L.H. Carbide Corporation | Ignition coil assembly |
US6195875B1 (en) | 1996-06-05 | 2001-03-06 | L.H. Carbide Corporation | Apparatus for manufacturing long, slender lamina stacks from nonuniform laminae |
US6163949A (en) * | 1996-06-05 | 2000-12-26 | L.H. Carbide Corporation | Method for manufacturing long, slender lamina stack 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 |
FR2922027B1 (fr) | 2007-10-08 | 2011-04-29 | Nexter Systems | Dispositif de test du fonctionnement d'un generateur de champ magnetique |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3707913A (en) * | 1969-07-31 | 1973-01-02 | W Lee | Pulsed-energy detonation system for electro explosive devices |
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 |
US4993325A (en) * | 1970-06-02 | 1991-02-19 | The United States Of America As Represented By The Secretary Of The Navy | Magnetic field generator |
US5001485A (en) * | 1968-12-20 | 1991-03-19 | The United States Of America, As Represented By The Secretary Of The Navy | Magnetic field generator |
EP0574967A1 (fr) * | 1992-06-18 | 1993-12-22 | Israel Aircraft Industries, Ltd. | Appareil pour le déminage de mines magnétiques |
FR2701105A1 (fr) * | 1993-02-01 | 1994-08-05 | Giat Ind Sa | Dispositif de déminage. |
Family Cites Families (1)
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 |
-
1996
- 1996-06-19 FR FR9607644A patent/FR2750204B1/fr not_active Expired - Lifetime
-
1997
- 1997-06-19 EP EP97930558A patent/EP0845097B1/fr not_active Expired - Lifetime
- 1997-06-19 US US09/000,180 patent/US6002321A/en not_active Expired - Lifetime
- 1997-06-19 ES ES97930558T patent/ES2160962T3/es not_active Expired - Lifetime
- 1997-06-19 DK DK97930558T patent/DK0845097T3/da active
- 1997-06-19 AT AT97930558T patent/ATE205593T1/de active
- 1997-06-19 DE DE69706633T patent/DE69706633T2/de not_active Expired - Lifetime
- 1997-06-19 CA CA002227886A patent/CA2227886C/fr not_active Expired - Fee Related
- 1997-06-19 WO PCT/FR1997/001105 patent/WO1997048965A1/fr active IP Right Grant
- 1997-06-20 ZA ZA9705478A patent/ZA975478B/xx unknown
-
2001
- 2001-10-17 GR GR20010401786T patent/GR3036912T3/el unknown
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
EP0574967A1 (fr) * | 1992-06-18 | 1993-12-22 | Israel Aircraft Industries, Ltd. | Appareil pour le déminage de mines magnétiques |
FR2701105A1 (fr) * | 1993-02-01 | 1994-08-05 | Giat Ind Sa | Dispositif de déminage. |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1983295A1 (fr) * | 2007-04-19 | 2008-10-22 | NEXTER Systems | Dispositif de protection d'un circuit de puissance oscillant |
Also Published As
Publication number | Publication date |
---|---|
DK0845097T3 (da) | 2002-01-07 |
EP0845097B1 (fr) | 2001-09-12 |
ATE205593T1 (de) | 2001-09-15 |
CA2227886A1 (fr) | 1997-12-24 |
GR3036912T3 (en) | 2002-01-31 |
FR2750204B1 (fr) | 1998-08-07 |
ZA975478B (en) | 1998-04-06 |
DE69706633D1 (de) | 2001-10-18 |
CA2227886C (fr) | 2006-01-10 |
FR2750204A1 (fr) | 1997-12-26 |
ES2160962T3 (es) | 2001-11-16 |
US6002321A (en) | 1999-12-14 |
EP0845097A1 (fr) | 1998-06-03 |
DE69706633T2 (de) | 2002-07-04 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0113267B1 (fr) | Convertisseur électromécanique à plusieurs degrés de liberté | |
EP0845097B1 (fr) | Bobine de deminage et dispositif de deminage en faisant application | |
CA1124998A (fr) | Procede pour la realisation d'une armature magnetique a structure divisee et armature ainsi obtenue | |
EP0616665B1 (fr) | Dispositif a palier magnetique et a butee mecanique pour le positionnement d'un corps tournant par rapport a un corps statorique | |
FR2797478A1 (fr) | Palier magnetique de centrage a commande en basculement de grande amplitude | |
CA2812722A1 (fr) | Antenne de grande dimension a ondes de surface et a large bande | |
FR2696057A1 (fr) | Moteur-couple allongé et dispositif de commande en débattement angulaire le comportant. | |
EP3403268A1 (fr) | Generateur de champ magnetique | |
EP2990375B1 (fr) | Dispositif micromécanique à actionnement électromagnétique | |
EP2710714B1 (fr) | Turbine génératrice de courant électrique | |
CA2173192A1 (fr) | Palier magnetique miniature a au moins un axe actif | |
EP3529858A1 (fr) | Revêtement pour la dissimulation d'objets au rayonnement électromagnétique d'antennes | |
EP3688866B1 (fr) | Convertisseur d'énergie électromagnétique | |
EP0303547A1 (fr) | Transducteur omnidirectionnel d'ondes élastiques à large bande passante | |
WO2016046499A1 (fr) | Noyau magnetique de transformateur tournant | |
CA2897891C (fr) | Dispositif electrique pour le stockage d'electricite par volant d'inertie | |
FR2713292A1 (fr) | Dispositif à palier magnétique pour le basculement d'un corps tournant par rapport à un corps statorique. | |
FR2875215A1 (fr) | Procede de realisation d'une protection externe d'un vecteur et vecteur dote d'une telle protection. | |
EP4191847A1 (fr) | Transducteur electromagnetique pour la recuperation d'energie vibratoire | |
EP4099717A1 (fr) | Moteur de haut-parleur à deux aimants opposés | |
FR2686858A1 (fr) | Procede pour commander la position relative entre deux engins se deplacant au voisinage l'un de l'autre, en particulier entre deux satellites, et systeme de mise en óoeuvre. | |
FR2696059A1 (fr) | Moteur-couple à induit plat et dispositif de commande en débattement angulaire le comportant. | |
WO2017199114A1 (fr) | Blindage magnétique pour dispositif de transmission d'énergie sans contact | |
FR2620575A1 (fr) | Antenne pour ondes decametriques, a dipoles et reflecteur forme de fils | |
WO2012107682A1 (fr) | Dispositif de moteur magnétique de transducteur électrodynamique |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): CA RO SI US |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LU MC NL PT SE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1997930558 Country of ref document: EP |
|
ENP | Entry into the national phase |
Ref document number: 2227886 Country of ref document: CA Ref country code: CA Ref document number: 2227886 Kind code of ref document: A Format of ref document f/p: F |
|
WWE | Wipo information: entry into national phase |
Ref document number: 09000180 Country of ref document: US |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWP | Wipo information: published in national office |
Ref document number: 1997930558 Country of ref document: EP |
|
WWG | Wipo information: grant in national office |
Ref document number: 1997930558 Country of ref document: EP |