公开(公告)号：US12300412B2

公开(公告)日：2025-05-13

申请号：US17906006

申请日：2021-03-04

Applicant: YOKOGAWA ELECTRIC CORPORATION

Inventor： Shoichi Shiosaki ,  Shinya Mito ,  Shoma Takeda

IPC: H01F13/00 ,  G01N27/84

Abstract: A magnetizing apparatus (1) includes an openable and closeable annular portion (3) formed by a magnet (2). The annular portion (3) includes a lock mechanism (4) configured to hold the annular portion (3) in a closed state. A magnetizing method includes an attaching step of placing an object inside the annular portion (3) by opening and closing the annular portion (3) and attaching the magnetizing apparatus (1) to the object by holding the annular portion (3) in a closed state with the lock mechanism (4), a moving step of moving the magnetizing apparatus (1) relative to the object in the axial direction of the annular portion (3) while the magnetizing apparatus (1) is attached to the object, and a detaching step, after the moving step, of releasing the lock mechanism (4) to detach the magnetizing apparatus (1) from the object.

公开(公告)号：US12300430B2

公开(公告)日：2025-05-13

申请号：US18127134

申请日：2023-03-28

Applicant: Yokogawa Electric Corporation

Inventor： Shoma Takeda ,  Shoichi Shiosaki ,  Fumitake Terao ,  Masahito Tsukano

IPC: H01F7/02 ,  H01F13/00

Abstract: A magnetization device and the like appropriate for various magnetization requirements are more easily provided. Provided is a magnet holding device that is capable of holding a magnet. The magnet holding device includes a ring-shaped portion that is openable/closable and an open/close mechanism allowed to keep the ring-shaped portion in a closed state. The magnet is arrangeable in the ring-shaped portion, and the number of the magnets to be arranged is variable.

公开(公告)号：US11835483B2

公开(公告)日：2023-12-05

申请号：US17911050

申请日：2021-03-04

Applicant: YOKOGAWA ELECTRIC CORPORATION

Inventor： Shinya Mito ,  Kazunori Miyazawa ,  Fumitake Terao ,  Shoma Takeda ,  Shoichi Shiosaki

IPC: G01N27/83

CPC classification number: G01N27/83

Abstract: A magnetic flaw detection method includes a magnetization step (S2) of moving a magnet (21) in a predetermined direction (D) along a surface of an object (7) that is a magnetic body and subsequently removing the magnet (21) from the surface of the object (7) to magnetize a region (R) corresponding to a movement range of the magnet (21) on the object (7), a sensor arrangement step (S3) of arranging a magnetic sensor (35a) to be capable of measuring magnetic flux leakage (8) generated from an abnormal portion (72) of the region (R) that was magnetized in the object (7), and a detection step (S4) of detecting an abnormality in the region (R) with the magnetic sensor (35a) arranged by the sensor arrangement step (S3).