Ultrasonic tandem testing with high spatial resolution

摘要

The invention relates to a method for ultrasonic tandem testing, it being the case that a) for a multi-head system each signal is stored for each individual test head, b) transit time and amplitude are measured and stored for each test position, c) measure b) is carried out for the next test head position, the values in the memory are added, and d) the intensity is calculated from these added values and the picture of a defect is imaged, e.g., on a television screen. The advantage is the particularly high accuracy.