ultrasonic transducer and control proceeds by ultrasonic welding zone.

The invention relates to an ultrasonic transducer (1) for the ultrasonic inspection of a weld zone (2) and an ultrasonic inspection method using this transducer. The transducer (1) comprises a plurality of transmitter elements / receivers of ultrasonic waves (3) for transmitting ultrasonic waves towards the weld zone (2) and to receive ultrasonic waves reflected from the weld area ( 2). According to the invention, the transmitter / ultrasonic wave receiving elements (3) are arranged to obtain an ultrasonic transducer (1) having a detection surface (13) forming a pattern (4a, 4b) cross-shaped or Canvas.