Bandwidth-Dependent DGS Diagrams

Abstract

The advantage of the new probe technology is the fact that these angle beam probes behave like straight beam probes with circular transducers for transverse waves. Therefore, it is much easier to handle these probes mathematically. Without having to consider all the complex effects at the interface between wedge and test piece, bandwidth-dependent DGS diagrams can be derived. Even a general DGS diagram can be developed bandwidth dependently for families of single element angle beam probes or families of phased array angle beam probes as long as they have all nearly the same bandwidth. With these bandwidth-dependent DGS diagrams, the restriction in the EN ISO 16811:2012 to use only sound paths larger than 0.7 near field lengths can be neglected.