TY  - CONF
A1  - Boehm, Rainer
T1  - Cone type Phased Array Design for High Speed Hollow Axle Inspection
N2  - To increase inspection speed and inspection reliability the use of phased array system is a superior solution. Especially for shaft inspection phased array setups are commonly used. For hollow axle inspection typically a number conventional probes rotating through the axles drilling are applied, without demounting the axes and without dismantling the wheels and the brake discs.
A new approach using a cone type array operated in immersion technique will allows to increase inspection speed and reduce the mechanical effort of the inspection system by rotating the sound field for the circumferential scan electronically. Only a linear movement of the probe is necessary to move the phased array cone forward and backwards inside the drilling. By applying additional focal laws the beam can be inclined exactly and be focused in the plane vertical to the specimen axis to concentrate the sound in the zones close to the external surface of the railway axle.
The cone type phased array probe has been optimized to detect transversal flaws in and close to the outer surface of the hollow axle, whose surface lies in the radial-radial plane.
The prototype probe system and its performance will be presented.
T2  - ESIS TC24 Workshop: Integrity of Railway Structures
CY  - Wittenberge, Germany
DA  - 25.09.2017
KW  - Hollow Axle Inspection
KW  - Ultrasound
KW  - UT
KW  - Phased Array
KW  - Cone Type Array
PY  - 2017
AN  - OPUS4-42523
LA  - eng
AD  - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER  -