EP 1073879 A1 20010207 - 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
Application
Priority
- FR 0000416 W 20000218
- FR 9902106 A 19990219
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
IPC 8 full level
G01C 19/70 (2006.01)
CPC (source: EP US)
G01C 19/70 (2013.01 - EP US)
Citation (search report)
See references of WO 0049368A1
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
FR 2790082 A1 20000825; FR 2790082 B1 20010518; EP 1073879 A1 20010207; US 6498651 B1 20021224; WO 0049368 A1 20000824
DOCDB simple family (application)
FR 9902106 A 19990219; EP 00906431 A 20000218; FR 0000416 W 20000218; US 64793600 A 20001018