BODY SEARCH DEVICE, BODY SEARCH PROGRAM, AND BODY SEARCH METHOD

摘要

PROBLEM TO BE SOLVED: To search for a body by using a forward scattered wave forwardly scattered from the body. SOLUTION: This body search device includes: a sound source for sending sound wave pulses into a propagation environment; a transducer array disposed in a domain for receiving the forward scattered wave forwardly scattered from the body existing in the propagation environment; addition processors for extracting only signals of the forward scattered wave by vector-adding a reference signal in a reference sound field, the reference signal received by the transducer array with the body not existing in the propagation environment, to a mixed signal received by the transducer array in a search sound field with the body existing in the propagation environment; a time reversal processor for applying a time reversal process to the forward scattered wave extracted by the addition processors to generate sound wave pulses with time reversed; and a phase conjugation determiner for checking whether phase conjugate properties hold in the propagation environments ranging from the sound source to the transducer array by applying passive phase conjugation to the sound wave pulses generated by the reversal processor. COPYRIGHT: (C)2010,JPO&INPIT