Method of compensating anisotropy in a vibrating-bell inertial rotation sensor

1. A method of compensating an electrode gain anisotropy in an inertial rotation sensor comprising a metallized vibrating bell ( 1 ) having a bias voltage applied thereto, the vibrating bell having an edge ( 7 ) facing control electrodes and detection electrodes ( 5 . 1 , 5 . 2 ) carried by a stand ( 3 ), the method comprising the steps of measuring a gain difference between said detection electrodes, and applying a fraction of the bias voltage to at least one of said detection electrodes as a function of the gain differences measured between said detection electrodes for compensating said gain difference.

2. A method according to claim 1 , including the steps of measuring the gains of all of the electrodes, applying to an electrode having the highest gain a bias voltage fraction necessary for balancing its gain with the electrode having the lowest gain, and applying to the other electrodes respective bias voltage fractions of the same sign and of magnitudes that vary inversely with their gain differences relative to the electrode having the lowest gain.

3. A method according to claim 1 , including the steps of comparing gain between electrodes ( 5 . 1 , 5 . 2 ) that are diametrically-opposite, and applying to said electrodes bias voltage fractions of the same magnitude and of opposite signs.

4. A method according to claim 1 , wherein the gain difference between said detection electrodes is measured by multiplexing by means of a single processor system for a group of electrodes.