US 12,467,904 B2
Method for non-destructively testing objects, in particular planar objects, made of a fibre-reinforced composite material
Tobias Roelfes, Spelle (DE); and Hanna Krümpel, Neuenkirchen (DE)
Assigned to Rosen IP AG, Stans (CH)
Appl. No. 18/002,410
Filed by ROSEN SWISS AG, Stans (CH)
PCT Filed Jun. 16, 2021, PCT No. PCT/EP2021/066281
§ 371(c)(1), (2) Date Dec. 19, 2022,
PCT Pub. No. WO2021/255114, PCT Pub. Date Dec. 23, 2021.
Claims priority of application No. 102020116 174.3 (DE), filed on Jun. 18, 2020.
Prior Publication US 2023/0228717 A1, Jul. 20, 2023
Int. Cl. G01N 29/04 (2006.01); G01N 29/07 (2006.01); G01N 29/24 (2006.01)
CPC G01N 29/043 (2013.01) [G01N 29/07 (2013.01); G01N 29/2412 (2013.01); G01N 2291/0231 (2013.01); G01N 2291/0289 (2013.01); G01N 2291/0427 (2013.01); G01N 2291/106 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method for nondestructively testing objects made of a fiber composite material which is in at least single-layer form, the method comprising:
generating, via a transmitting transducer in the form of an EMUS transducer, an electromagnetic ultrasonic signal in the object by a conductive layer arranged on a surface of the object or in the object,
detecting propagation of the ultrasonic signal in the object by a receiving transducer in the form of an EMUS transducer;
determining, by an evaluation apparatus utilizing the ultrasonic signal detected by the at least one receiving transducer, a flaw in the form of a delamination, a porefield or other such two-dimensional inhomogeneities;
wherein the flaw is determined by virtue of a local phase velocity and/or a local wavelength of the received ultrasonic signal at a location of the receiving transducer being determined in the evaluation apparatus and used to determine the depth of the flaw.