公开(公告)号：DE3633556A1

公开(公告)日：1987-04-09

申请号：DE3633556

申请日：1986-10-02

Applicant: BASF AG

Inventor： JUGENHEIMER ALFRED ,  LIMPERT ROLF ,  STEINHOFF UDO

IPC: G01N29/24 ,  G01N29/04 ,  G01N33/44

Abstract: In a device for non destructively testing materials, for example highly stressed components made of fibre-reinforced plastics and other materials having strong ultrasound scattering, for very small defects by irradiation with ultrasonic waves, a diaphragm (3) is placed in front of the receiver test head (4). The diaphragm isolates the receiver test head (4) from laterally incident stray signals, substantially reduces the region of a component (2) under test at any instant and improves the detection capability for small defects as a result of the increased ratio of defect area to test region.

公开(公告)号：DE3342463A1

公开(公告)日：1984-05-30

申请号：DE3342463

申请日：1983-11-24

Applicant: BASF AG

Inventor： NICK GUENTHER ,  LIMPERT ROLF

IPC: G01N29/04 ,  G01N29/11

Abstract: In a method of monitoring the development of cracks in machine parts and components, in particular in engine and machine shafts, by irradiation with ultrasonic waves, a hole in which a receiver test head for receiving the ultrasonic waves emitted by a transmitting test head is displaced is made in the crack-free section of the machine part or component. The hole is situated near the crack plane on a side of the latter which is remote from the transmitting test head and it extends to a greater depth than the crack plane and does not intersect the latter.