Convergence of the phase conjugate wave to a pseudo sound source

摘要

This paper describes that in shallow water the scattered wave from the target is detected by converging the sound wave to the target using the phase conjugate wave. The phase conjugate wave radiated from the vertical linear transducer array (VLA) is converged to the sound source position. It was confirmed that the phase conjugate wave converged at the sound source position by the experiment. The sound source is replaced with a pseudo sound source. It is assumed that the sound wave is transmitted from a pseudo sound source, and obtains the wave form in the element of VLA by the calculation. The calculated waveform is executed time reversal processing and it reradiated from VLA. And it was confirmed that the phase conjugate wave converged at the position of the pseudo sound source by the experiment. Consequently, it was confirmed to move the focus of the phase conjugate wave without a real sound source, and to be able to detect the target.