抄録
In this research, a technique for characterizing thin coating on steel plate and imaging the distribution of coating thickness by utilizing acoustic resonant phenomenon is reported. First, acoustic properties (acoustic impedance, sound velocity and density) of thin coating were measured by the acoustic resonant spectroscopy technique. Using the measured sound velocity of the coating, the thickness distribution of the back side coating of the sample was successfully obtained by scanning the focused-type ultrasonic transducer.
