Target object exploration equipment, target object exploration program and the target object exploration methods

摘要

PROBLEM TO BE SOLVED: To accurately search a target using a forward scattered wave mixed in a traveling wave directly traveling from a sound source.;SOLUTION: A target searching device includes: a sound source for transmitting a sound wave into a propagation space; a transducer array placed in an area to receive a forward scattered wave which is scattered forward from the target within the propagation space; a subtraction processing means for subtracting a traveling wave directly traveling towards the transducer array from a mixed wave of the forward scattered wave and the traveling wave directly traveling towards the transducer array to separate the forward scattered wave; a passive-phase conjugate processing means for performing passive-phase conjugate processing on the forward scattered wave separated by the subtraction processing means to generate a conjugative correlation signal of the forward scattered wave; an autocorrelation processing means for performing autocorrelation processing on the traveling wave which enters at an optional position within the propagation space with the sound source used as a reference position to generate an autocorrelation processed signal of the traveling wave; and a correlation means for determining a similarity between the autocorrelation processed signal and the conjugative correlation signal.;COPYRIGHT: (C)2010,JPO&INPIT