公开(公告)号：US11782026B2

公开(公告)日：2023-10-10

申请号：US17652509

申请日：2022-02-25

Applicant: ABB Schweiz AG

Inventor： Martin Zlatanski ,  Thomas Wiik

IPC: G01N27/72 ,  B21B38/00 ,  G01N33/20

CPC classification number: G01N27/72 ,  B21B38/00 ,  G01N33/20

Abstract: A measurement device for measuring properties of a metal sheet processed in a rolling mill, including: an inspection coil set including a transmitter coil and a receiver coil, the transmitter coil being configured to apply a time-varying magnetic field to the metal sheet, and the receiver coil being configured to detect a magnetic field transient produced from the metal sheet. The property of the metal sheet is derivable from the magnetic field transient. A correction coil set, for detecting a spatial deviation of the metal sheet from a reference plane, each correction coil being connectable to a capacitor to form a respective resonance circuit having a resonance frequency. The correction coils are resonated at the respective resonance frequency. A shift in the resonance frequency in the presence of the metal sheet is detectable and the spatial deviation is derivable from the shifts.

公开(公告)号：US20240264120A1

公开(公告)日：2024-08-08

申请号：US18575897

申请日：2022-06-28

Applicant: ABB Schweiz AG

Inventor： Martin Zlatanski ,  Parham Davami ,  Jarl Sobel ,  Thomas Wiik ,  Jan Nilsson

IPC: G01N27/90 ,  G01B7/06 ,  G01N27/02

CPC classification number: G01N27/9006 ,  G01B7/10 ,  G01N27/025 ,  G01N27/028

Abstract: A receiver for a Pulsed Eddy Current (PEC) system configured to detect a changing electromagnetic field generated by eddy currents induced in an object of an electrically conductive material. The receiver includes an electrically conductive receiver coil, a high-voltage receiver channel, a low-voltage receiver channel, and an over-voltage protection connected between the receiver coil and the LVRC. The OVP includes a bias circuit B, a diode D connected between the receiver coil and the bias circuit, and a capacitor C connected between the bias circuit and the LVRC.

公开(公告)号：US20220283120A1

公开(公告)日：2022-09-08

申请号：US17652509

申请日：2022-02-25

Applicant: ABB Schweiz AG

Inventor： Martin Zlatanski ,  Thomas Wiik

IPC: G01N27/72 ,  G01N33/20 ,  B21B38/00

Abstract: A measurement device for measuring properties of a metal sheet processed in a rolling mill, including: an inspection coil set including a transmitter coil and a receiver coil, the transmitter coil being configured to apply a time-varying magnetic field to the metal sheet, and the receiver coil being configured to detect a magnetic field transient produced from the metal sheet. The property of the metal sheet is derivable from the magnetic field transient. A correction coil set, for detecting a spatial deviation of the metal sheet from a reference plane, each correction coil being connectable to a capacitor to form a respective resonance circuit having a resonance frequency. The correction coils are resonated at the respective resonance frequency. A shift in the resonance frequency in the presence of the metal sheet is detectable and the spatial deviation is derivable from the shifts.