US Patent No. 10,557,952


Patent No. 10,557,952
Issue Date February 11, 2020
Title Accelerometer Device
Inventorship Christophe Robert, Sophia Antipolis (FR)
Thomas Fini, Sophia Antipolis (FR)
Fabienne Lebreil, Sophia Antipolis (FR)
Isabelle Tournoud, Sophia Antipolis (FR)
Assignee THALES, Courbevoie (FR)

Claim of US Patent No. 10,557,952

1. An accelerometer device for determining the acceleration of an acoustic antenna to which the accelerometer device is mechanically connected, along three axes X, Y and Z of a main orthonormal reference system comprising three axes X, Y, Z, said acoustic antenna being subject to a surrounding pressure, the acoustic antenna comprising at least one acoustic module comprising one or more acoustic sensors mounted on at least one printed circuit board, said acoustic sensors delivering electric signals using acceleration references provided by said accelerometer device, wherein the accelerometer device comprises a set of accelerometer sensors of MEMS type comprising N accelerometer sensors, said number N of accelerometer sensors being at least equal to two, said accelerometer sensors being mounted on said at least one printed circuit board, each accelerometer sensor being configured to determine the acceleration of said acoustic antenna according to each axis X, Y, Z, the position of each sensor being defined in an auxiliary reference system comprising three orthonormal axes Xi, Yi, Zi, the plane (Xi, Yi) defining the plane of each accelerometer sensor and being parallel to the plane (X, Z) of said main reference system, said set of accelerometer sensors comprising at least one pair of accelerometer sensors mounted on either side of said at least one printed circuit board, and wherein:for each pair of accelerometer sensors, the sensors of the pair have components of opposite sign along two axes of the main reference system; and
the axes of the main reference system along which the components of the accelerometer sensors of said at least one accelerometer sensor pair have opposite signs comprise at least two of the three axes X, Y and Z of the main reference system to compensate for the effect of the pressure on at least two axes of the main reference system.