公开(公告)号：FR2788163A1

公开(公告)日：2000-07-07

申请号：FR9816659

申请日：1998-12-30

Applicant: SEXTANT AVIONIQUE

Inventor： GUILLEMIN PIERRE ,  GIROUD PIERRE

IPC: G01V1/18 ,  H01F7/08 ,  H01F7/121

Abstract: The invention concerns an electromagnetic actuator designed to move an external member (2), comprising a fixed stator element (12) associated with a mobile polar element (14) capable of being made integral with the external member (2), the fixed stator element (12) and the mobile polar element (14) forming a magnetic circuit and defining between them at least two air gaps (51), a magnet (5) promoting the generation of magnetic field lines in the magnetic circuit, a coil (6) and means powering the coil to control by electromagnetic induction phenomena the displacement of the mobile adjusting polar element (15). It further comprises a polar adjusting element (15) to place the mobile polar element (14) in an adjusted position relative to that of the fixed stator element (12), by deviating the magnetic field lines. The invention is particularly applicable to accelerometers.

公开(公告)号：CA2239107A1

公开(公告)日：1997-06-19

申请号：CA2239107

申请日：1996-12-10

Applicant: SEXTANT AVIONIQUE

Inventor： GIROUD PIERRE ,  GUILLEMIN PIERRE ,  MIGEON ANDRE ,  PEDRAZA-RAMOS SYLVIE

IPC: G01P15/08 ,  G01P15/12 ,  G01P15/13

Abstract: L'invention concerne un accéléromètre électromagnétique comportant une partie sensible en silicium avec une masse mobile (2) reliée à un cadre périphérique (3) via des bras de suspension (80,81). La partie sensible en silicium est solidaire d'un moteur (1) à raideur dite négative comprenant une enceinte polaire (12) fixe liée au cadre périphérique, un aimant (5), une bobine (6) et une partie polaire mobile (14) insérée dans l'enceinte (12), ladite partie polaire (14) étant solidaire de la masse mobile (2). Application: géophone.

公开(公告)号：FR2742231A1

公开(公告)日：1997-06-13

申请号：FR9514687

申请日：1995-12-12

Applicant: SEXTANT AVIONIQUE

Inventor： GIROUD PIERRE ,  GUILLEMIN PIERRE ,  MIGEON ANDRE ,  PEDRAZA RAMOS SYLVIE

IPC: G01P15/08 ,  G01P15/12 ,  G01P15/13 ,  G01P15/09

Abstract: An electromagnetic accelerometer comprising a sensitive silicon portion with a movable weight (2) connected to a frame (3) via a suspension arm (80, 81). The sensitive silicon portion is secured to a motor (1) having so-called negative stiffness and including a stationary pole chamber (12) connected to the frame, a magnet (5), a coil (6) and a movable pole portion (14) inserted into the chamber (12) and secured to the movable weight (2). Said accelerometer is useful in geophones.

公开(公告)号：BR9612775A

公开(公告)日：2000-10-24

申请号：BR9612775

申请日：1996-12-10

Applicant: SEXTANT AVIONIQUE

Inventor： GIROUD PIERRE ,  GUILLEMIN PIERRE ,  MIGEON ANDRE ,  PEDRAZA-RAMOS SYLVIE

IPC: G01P15/08 ,  G01P15/12 ,  G01P15/13

Abstract: PCT No. PCT/FR96/01969 Sec. 371 Date May 4, 1999 Sec. 102(e) Date Apr. 5, 1999 PCT Filed Dec. 10, 1996 PCT Pub. No. WO97/22011 PCT Pub. Date Jun. 19, 1997An electromagnetic accelerometer includes a peripheral frame, a mass suspended from the peripheral frame, a plurality of strain gauges configured to detect displacement of the mass, and a magnetic motor. The magnetic motor includes a first pole piece defining a chamber, a second pole piece positioned in the chamber and coupled to the mass, a permanent magnet coupled to the first pole piece, and a coil coupled to the first pole piece. The permanent magnet and the coil surround at least a portion of the second pole piece.

公开(公告)号：NO982668A

公开(公告)日：1998-08-11

申请号：NO982668

申请日：1998-06-10

Applicant: SEXTANT AVIONIQUE

Inventor： GIROUD PIERRE ,  GUILLEMIN PIERRE ,  MIGEON ANDRU ,  PEDRAZA-RAMOS SYLVIE

IPC: G01P15/08 ,  G01P15/12 ,  G01P15/13 ,  G01P15/09

CPC classification number: G01P15/132 ,  G01P15/0802 ,  G01P15/123

公开(公告)号：AU1101697A

公开(公告)日：1997-07-03

申请号：AU1101697

申请日：1996-12-10

Applicant: SEXTANT AVIONIQUE

Inventor： GIROUD PIERRE ,  GUILLEMIN PIERRE ,  MIGEON ANDRE ,  PEDRAZA-RAMOS SYLVIE

IPC: G01P15/08 ,  G01P15/12 ,  G01P15/13

Abstract: PCT No. PCT/FR96/01969 Sec. 371 Date May 4, 1999 Sec. 102(e) Date Apr. 5, 1999 PCT Filed Dec. 10, 1996 PCT Pub. No. WO97/22011 PCT Pub. Date Jun. 19, 1997An electromagnetic accelerometer includes a peripheral frame, a mass suspended from the peripheral frame, a plurality of strain gauges configured to detect displacement of the mass, and a magnetic motor. The magnetic motor includes a first pole piece defining a chamber, a second pole piece positioned in the chamber and coupled to the mass, a permanent magnet coupled to the first pole piece, and a coil coupled to the first pole piece. The permanent magnet and the coil surround at least a portion of the second pole piece.

公开(公告)号：NO962054A

公开(公告)日：1996-11-25

申请号：NO962054

申请日：1996-05-21

Applicant: SEXTANT AVIONIQUE

Inventor： GIROUD PIERRE ,  PEDRAZA-RAMOS SYLVIE ,  GUILLEMIN PIERRE ,  MIGEON ANDRE

IPC: G01P15/13

CPC classification number: G01P15/132

公开(公告)号：DK0744623T3

公开(公告)日：2001-11-12

申请号：DK96410055

申请日：1996-05-21

Applicant: SEXTANT AVIONIQUE

Inventor： MIGEON ANDRE ,  GIROUD PIERRE ,  GUILLEMIN PIERRE ,  PEDRAZA-RAMOS SYLVIE

IPC: G01P15/13

公开(公告)号：FR2742224A1

公开(公告)日：1997-06-13

申请号：FR9514688

申请日：1995-12-12

Applicant: SEXTANT AVIONIQUE

Inventor： PEDRAZA RAMOS SYLVIE ,  GIROUD PIERRE ,  GUILLEMIN PIERRE ,  MIGEON ANDRE

IPC: G01L9/00 ,  G01P15/08 ,  G01P15/12 ,  G01D5/12 ,  G01P15/09

Abstract: A single crystal silicon-based sensor has a membrane with an upper surface in a plane (p1) and a lower surface in a plane (p2). The membrane is suspended from solid parts having upper surfaces in the plane (p1) and lower surfaces in a plane (p3). The novelty is that: (a) the distance between the planes (p1, p2) is small compared with the distance between the planes (p2, p3); and (b) the solid parts include, in the plane (p2), a layer (1) of greater chemical etching stability than silicon. Also claimed is a method of making the sensor by chemically etching a monolithic element which has an upper surface in a plane (p), a lower surface in the plane (p3) and an insulating layer (1) in the plane (p2). The etching is carried out between planes (p3) and (p2) and stops on the layer (1) to define one or more membranes in the monolithic element. Preferably the layer (1) is a silicon oxide or nitride layer.

公开(公告)号：AU707264B2

公开(公告)日：1999-07-08

申请号：AU1101697

申请日：1996-12-10

Applicant: SEXTANT AVIONIQUE

Inventor： GIROUD PIERRE ,  GUILLEMIN PIERRE ,  MIGEON ANDRE ,  PEDRAZA-RAMOS SYLVIE

IPC: G01P15/08 ,  G01P15/12 ,  G01P15/13

Abstract: PCT No. PCT/FR96/01969 Sec. 371 Date May 4, 1999 Sec. 102(e) Date Apr. 5, 1999 PCT Filed Dec. 10, 1996 PCT Pub. No. WO97/22011 PCT Pub. Date Jun. 19, 1997An electromagnetic accelerometer includes a peripheral frame, a mass suspended from the peripheral frame, a plurality of strain gauges configured to detect displacement of the mass, and a magnetic motor. The magnetic motor includes a first pole piece defining a chamber, a second pole piece positioned in the chamber and coupled to the mass, a permanent magnet coupled to the first pole piece, and a coil coupled to the first pole piece. The permanent magnet and the coil surround at least a portion of the second pole piece.