G - Physics – 08 – C
Patent
G - Physics
08
C
340/135.2
G08C 21/00 (2006.01) G01B 7/16 (2006.01) G01D 5/241 (2006.01) G01L 3/10 (2006.01)
Patent
CA 2013690
Disclosed are capacitive sensors designed to measure the very low-amplitude displacements of two zones with respect to each other. It comprises a capacitive element formed by two elements that are fitted to each other by a shrink-on method, and respectively having two facing cylindrical surfaces, the longitudinal axes of which are parallel to one and the same given direction, these surfaces bearing electrodes, at least some of which have limits parallel to the given direction. These two supports are respectively rigidly connected to the two zones, so much so that the capacitance of the capacitors formed by the electrodes of the facing surfaces varies as a function of the relative displacements of the two zones perpendicularly to the given direction. Thus the measurement of the displacements perpendicularly to this given direction is done by a measurement of variation in capacitance.
Goudreau Gage Dubuc
Thomson-Csf
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