| 摘要 |
A transducer main body (7) has, on the leading end side thereof, a vibrating surface (9) having a curved shape in side view, said curved shape conforming to the large diameter-side curved portion (Wc) of a laminated component (W), and on the vibrating surface (9) of the transducer main body (7), a plurality of piezoelectric vibrators (11) are disposed in matrix in the curve direction (AD) and the width direction (BD). The control unit (5) sequentially performs processing from a piezoelectric vibrator (11) for reception using an aperture synthesis method on the basis of received signals, while performing switching in the width direction (BD) between a piezoelectric vibrator (11) for transmission and the piezoelectric vibrator (11) for reception, in each vibrator group (11G), on the basis of a transmission/reception pattern previously set. |
