Signal processing for non-destructive object testing involves storing digitized reflected ultrasonic signals and phase-locked addition of stored amplitude values with equal transition times

摘要

The method involves transmitting a complete wavefront to at least one section of the object to be tested with a number of independent transmission elements (EL1,..), receiving a wave reflected from the object surface with a number of independent receiver elements (EL1,..), digitizing the received signals, storing (SP) the digitized signals according to amplitude and transition time and detecting defects by phase-locked addition of the stored amplitude values with equal transition times.. An independent claim is also included for the following: (a) an arrangement for non-destructive object testing by reflection of ultrasonic waves.