METHOD AND SYSTEM FOR INSPECTING A ZONE

摘要

A method is provided for inspecting a zone, termed the zone of interest, whose characteristics are known at least partially, to detect at least one element included in the zone of interest, the method including: a first detection providing, through a time reversal method, a first signal relating to the position of the element for a first emission point, and at least one second detection providing, through a time reversal method, at least one second signal relating to the position of the element for a second emission point different from the first emission point. The method furthermore includes a multiplication of the first detection signal with the second detection signal to provide a third detection signal which is more accurate than the first and the second detection signal. A system implementing this method is also provided.

主权项

1. A method for inspecting a zone, termed the zone of interest, the features of which are at least partially known, for detecting at least one element in said zone of interest, said method comprising:
a first detection providing a first signal relating to the position of said element for a first emission point; at least one second detection providing at least one second signal relating to the position of said element for a second emission point different from said first emission point;each of said detections comprising at least one iteration of the following operations forming a detection phase:
emission of a wave, termed the incident wave, towards said element from an emission point; measurement, at at least two reception points arranged at the boundary of or outside the zone of interest, of a diffracted portion of said incident wave, termed the diffracted wave, diffracted by said element; determination of the time reversal, termed the reversed wave, of said diffracted wave; and determination, for said emission point, of a detection signal as a function of said incident wave and said reversed wave;said method including a step of multiplying the value of said first signal by the value of said at least one second signal, said multiplication providing a third signal, termed the final signal, relating to the position of said element in said zone of interest.