公开(公告)号：US11287398B2

公开(公告)日：2022-03-29

申请号：US16686470

申请日：2019-11-18

申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

发明人： Henning Heuer ,  Martin Schulze ,  Iben Khaldoun Lefkaier ,  Mohammed Naïdjate ,  Bachir Helifa ,  Feliachi Mouloud

IPC分类号： G01D5/20 ,  G01N27/90 ,  G01N27/9013

摘要： The invention relates to an eddy current sensor element for non-destructive testing of a substrate, having an assembly of at least a first and a second flat coil, wherein the first flat coil and the second flat coil each have a triangular shape with a first to third coil edge, wherein one of the edges of the first flat coil and one of the edges of the second flat coil are arranged adjacent and parallel to each other, and wherein the assembly has a quadrangular shape. The invention further relates to an eddy current sensor for the non-destructive testing of a substrate, having a plurality of the eddy current sensor elements.

公开(公告)号：US12025585B2

公开(公告)日：2024-07-02

申请号：US17756491

申请日：2020-11-04

申请人： Fraunhofer-Gesellschaft zur Förderung der Angewandten Forschung E.V.

发明人： Henning Heuer ,  Frank Schubert ,  Marcel Wild

IPC分类号： G01N29/14 ,  B29C48/92 ,  G01N29/07 ,  G01N29/24 ,  G01N29/27 ,  G01N29/28 ,  G01N29/34 ,  G01N29/42 ,  G01N29/50

CPC分类号： G01N29/07 ,  B29C48/92 ,  G01N29/14 ,  G01N29/2412 ,  G01N29/27 ,  G01N29/28 ,  G01N29/348 ,  G01N29/42 ,  G01N29/50 ,  B29C2948/92114 ,  B29C2948/9219 ,  B29C2948/922 ,  B29C2948/9238 ,  G01N2291/011 ,  G01N2291/015 ,  G01N2291/02818 ,  G01N2291/103

摘要： In a measuring arrangement for determining properties of a material to be extruded while an extrusion process is being carried out in an extruder, at least one extruder screw is rotatably mounted in a tubular guide in a barrel and is connected to a rotary drive. Material to be extruded is fed to the tubular guide at one end and is removed as finish-extruded material at an oppositely arranged discharge. Arranged at measuring positions at predeterminable defined intervals on the wall of the tubular guide along the longitudinal axis of the extruder screw are multiple first sound transducers, which are designed for the detection of sound waves that are generated during the extrusion process by the extrusion process as process noises and/or are emitted by a second sound transducer, arranged at one end of the tubular guide, in the direction of the longitudinal axis of the extruder screw and into the material to be extruded that is conveyed through a mixing chamber present in the tubular guide.