Method and kinematic calibration system for measuring displacements and vibrations of objects/structures

Abstract

A method and system are described for measuring displacements and vibrations of an object/structure (P). The method comprises the following steps: transmission of at least one radar wave by a single radar device (Q) positioned at a predefined distance (R) from a receiver device (10) applied on the object/structure (P); reception, by the radar device (Q), of a complex signal (s(t)) consisting of the sum of the signal reflected from said receiver device (10) and of one or more interfering signals (I) generated by one or more corresponding targets (I1, I2) substantially stationary and substantially positioned at the same distance (R) from the radar device (Q); separation of the interfering signals (I) from the reflected signal. The separation step comprises a calibration step which consists in the induction, for a pre-determined period of time, of a vibrational motion having a known frequency and duration in the receiver device (10), which consequently operates as a calibration device, for obtaining an estimated value of the interfering signals (I), and in the subtraction of the estimated value of the interfering signals (I) from the complex signal (s(t)), in order to substantially eliminate said one or more interfering signals (I) and obtain the entity of the displacement of the object/structure (P) on the basis of the reflected signal.

Dependencies are inferred from the claim text.