Patent ID: 8280648

Claim:
A wave acquisition device physically adapted to execute a method for locating an appearance of a defect in a medium using a wave, said medium being equipped with: sources placed in said medium and adapted for emitting the wave in the medium, sensors placed in said medium and adapted for receiving said emitted wave, said method being characterised in that it comprises: an initialisation step in which reference impulse responses h ref (R,S,t) of the wave between the sources and the sensors are determined, then at least one defect detection step, in which: a) impulse responses h i (R,S,t) of the wave between the sources and the sensors are measured on a date t i , i being a positive natural number, b) a decorrelation coefficient K i (S,R,t) between the impulse responses h i (R,S,t) on the date t i and the reference impulse responses h ref (R,S,t) is calculated, c) a probability of exploration P(S,R,t,x) of a position x of the medium by the wave is calculated, d) an error function e i (S,R,x) for each source-sensor pair is calculated, and e) a product p(i,x) of at least some of the error functions e i (S,R,x) of said source-sensor pairs is calculated, by p ⁡ ( i , x ) = ∏ S , R ⁢ ⁢ e i ⁡ ( S , R , x ) , said product p(i,x) representing a map of a probability of the appearance of a defect U at each position x.