A method and apparatus for determining the rotational speed of a movable body around an axis, as well as the use of these apparatus as a gyrometer or an accelerometer.

摘要

The invention relates to a method and a device for determining the speed of rotation of a movable about an axis. & br / is fixed to the mobile one end of a blade (l1) (called the receiving plate) arranged in such a way that the said axis is parallel to the mean plane of the blade and perpendicular to the average fibre of the blade, it creates a vibration directed perpendicularly to said plane, this vibration is applied to a mass (m), called the core, which is fixed to the other end of said blade, and it is used for the piezoelectric effect, in order to obtain a voltage (u1) proportional to the longitudinal vibration of this blade, said voltage being representative of the speed of rotation of the mobile around said axis (z ′ z). br / the invention applies particularly to a rate gyro and to an accelerometer.