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：US11988691B2

公开(公告)日：2024-05-21

申请号：US17620196

申请日：2020-06-17

Applicant: Yokogawa Electric Corporation

Inventor： Kazuma Takenaka ,  Kotaro Ogawa ,  Minako Terao ,  Naoki Noguchi ,  Saki Kobako ,  Fumitake Terao ,  Satoshi Yoshitake

IPC: G01R15/20 ,  G01R19/25 ,  G01R31/58

CPC classification number: G01R15/202 ,  G01R19/2506 ,  G01R31/58

Abstract: The current measurement device (1, 2) includes a first sensor (SE1) configured to detect a direct current magnetic field and a low-frequency alternating current magnetic field generated due to the current (1) flowing through the conductor (MC) to be measured, a second sensor (SE2) configured to detect alternating current magnetic fields from a low frequency to a high frequency generated due to the current (I) flowing through the conductor to be measured, a first calculator (21, 21A) configured to calculate the current flowing through the conductor to be measured from a detection result of the first sensor using distance information indicating a distance (r) between the first sensor (SE1) and the conductor (MC) to be measured, a second calculator (22) configured to calculate the current flowing through the conductor to be measured from a detection result of the second sensor, and a synthesizer (23) configured to synthesize a calculation result of the first calculator with a calculation result of the second calculator.

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).