Global Patent Index - EP 1073879 A1

EP 1073879 A1 2001-02-07 - DEVICE FOR DETECTING ACTIVATION MOVEMENT FOR LASER GYROSCOPE

Title (en)

DEVICE FOR DETECTING ACTIVATION MOVEMENT FOR LASER GYROSCOPE

Title (de)

ZITTERBEWEGUNGSDETEKTIONSVORRICHTUNG FÜR LASERKREISEL

Title (fr)

DISPOSITIF DE DETECTION DE MOUVEMENT D'ACTIVATION POUR GYROLASER

Publication

EP 1073879 A1 (FR)

Application

EP 00906431 A

Priority

  • FR 0000416 W
  • FR 9902106 A

Abstract (en)

[origin: FR2790082A1] Device for measurement of amplitudes of rotating oscillations imposed on a laser gyroscope to compensate for its lack of sensitivity at slow rotating speeds. The oscillatory rotating motion is provided by mounting the laser gyroscope in its frame case, using wheel shaped fixing rings centered on the activation axis with flexible spokes to provide flexibility with regard to the rotating torque.- DETAILED DESCRIPTION - The measurement device comprises several torque sensors (17-19) having a piezoelectric wafer positioned in different orientations on the spokes (in fact flexible blades) of a fixing ring.The sensor output electrodes (Ea, Eb) are connected in parallel or in opposition to a common output so as to generate, in response to spoke deformation due to rotating movements along the activation axis, electric loads of same polarity which sum at the output. Deformations arising from other movements generate electric loads which cancel each other out and therefore do not give any aggregate sum at the common output. Hence the response to activation movements is increased, while the response to deformations arising from other sources is reduced

IPC 1-7 (main, further and additional classification)

G01C 19/70

IPC 8 full level (invention and additional information)

G01C 19/70 (2006.01)

CPC (invention and additional information)

G01C 19/70 (2013.01)

Citation (search report)

See references of WO 0049368A1

Designated contracting state (EPC)

DE FR GB IT

EPO simple patent family

FR 2790082 A1 20000825; FR 2790082 B1 20010518; EP 1073879 A1 20010207; US 6498651 B1 20021224; WO 0049368 A1 20000824

INPADOC legal status


2004-05-12 [RBV] DESIGNATED CONTRACTING STATES (CORRECTION):

- Designated State(s): DE FR GB IT

2004-03-10 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20030902

2001-05-09 [RAP1] TRANSFER OF RIGHTS OF AN EP PUBLISHED APPLICATION

- Owner name: THALES AVIONICS S.A.

2001-02-07 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20001023

2001-02-07 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE