Method and system for measuring a variation in a dimension of a mechanical part

Abstract

A method for measuring a variation in a dimension (L) of a mechanical part along a direction called the longitudinal direction (x), includes the steps of: a) providing at least a first and second piezoelectric transducer arranged at two different positions along the longitudinal direction and acoustically coupled via the mechanical part; b) performing, at different times, a plurality of electric measurements in order to determine at least one value of an electric parameter dependent on an off-diagonal term of an impedance matrix of an electric quadrupole modeling the assembly formed by the acoustically coupled first and second piezoelectric transducers; and c) deducing from the results of the electric measurements the variation in the dimension of the mechanical part. A system for implementing this method is also provided.

Dependencies are inferred from the claim text.