公开(公告)号：EP4165402A2

公开(公告)日：2023-04-19

申请号：EP21732299.9

申请日：2021-06-14

申请人： ABB SCHWEIZ AG

发明人： LINDER, Sten ,  LIFVENBORG, Ulf

IPC分类号： G01N27/90

公开(公告)号：EP4053494A1

公开(公告)日：2022-09-07

申请号：EP21160295.8

申请日：2021-03-02

申请人： ABB Schweiz AG

发明人： LINDER, Sten ,  SOBEL, Jarl ,  EIDENVALL, Anders ,  HALDIN, Martin ,  DZIECIOL, Aleksander

IPC分类号： G01B7/06 ,  G01R27/00

摘要： The present disclosure relates to a method of non-contact measurement of a thickness (d) of an object (1) of an electrically conductive material by means of a Pulsed Eddy Current, PEC, system (10) comprising a transmitter coil (2) and a receiver coil (3). The method comprises, after having turned off a current in the transmitter coil, at the receiver coil, measuring a voltage induced by the decaying magnetic field at a first time point, a second time point and a third time point. The method also comprises calculating a total magnetic flux which is generated by the eddy currents in the object at the first time point and picked up by the receiver coil, by comparing the measured flux at the first time point with a predetermined total flux picked up by the receiver coil when no object is present. The method also comprises normalizing measured magnetic flux resulting from the eddy currents and picked up by the receiver coil, using the calculated total magnetic flux as a normalization factor such that the normalized eddy current flux is independent of a distance between the object and the transmitter and receiver coils. The method also comprising, based on the measurements at the first, second and third time points, determining the thickness and the resistivity of the object.

公开(公告)号：EP4164838A1

公开(公告)日：2023-04-19

申请号：EP21732301.3

申请日：2021-06-14

申请人： ABB SCHWEIZ AG

发明人： LINDER, Sten

IPC分类号： B23P6/04 ,  B22D11/12 ,  B21B38/00 ,  G01N27/82

公开(公告)号：EP3926341A1

公开(公告)日：2021-12-22

申请号：EP20180392.1

申请日：2020-06-16

申请人： ABB Schweiz AG

发明人： LINDER, Sten ,  LIFVENBORG, Ulf

IPC分类号： G01N27/90

摘要： The invention relates to a method of determining a crack (C) at an edge (E) of a metallic material (M), the edge having a curvature with a radius (R). The method comprising:
- feeding (S10) and controlling (S20) a current to a transmitter coil (3) for generating a magnetic field in the metallic material (M),
- detecting (S30) the magnetic field by means of a receiver coil (5), which detected magnetic field thereby generates a signal (S(t)) in the receiver coil,
- determining (S40) first, second and third signal values (St1, St2, St3) of the signal at a first time (t1), a second time (t2) and a third time (t3), respectively,
- determining (S70) a possible presence of a crack and its crack depth based on the first, second and third signal values (St1, St2, St3) by means of determining a characteristic relation between the signal values.

公开(公告)号：EP3925729A1

公开(公告)日：2021-12-22

申请号：EP20180393.9

申请日：2020-06-16

申请人： ABB Schweiz AG

发明人： LINDER, Sten

IPC分类号： B23P6/04 ,  B22D7/06 ,  B22D11/128 ,  B21B1/46 ,  B21B38/00 ,  B23K7/06 ,  G01N27/82

摘要： The invention relates to a method of removing a crack in a metallic material (M) during a metal making process. The method comprising:
- determining the presence of a crack (C) and its crack depth during the metal making process by a crack detecting unit (30, 16) utilizing inductive measurement,
- sending a crack detection signal (D) and crack depth (CD) to a crack removal unit (40, 25) arranged on known distance (KD) from the crack detecting unit, the crack removal unit comprising an ejector (42, 26) configured to eject a carving means (44, 27), and to vary the intensity of the ejected carving means,
- removing the detected crack by activating the ejector based on the crack detection signal with an intensity of the ejected carving means based at least on the crack depth.