公开(公告)号：US20250153271A1

公开(公告)日：2025-05-15

申请号：US19021458

申请日：2025-01-15

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： IZURU NAKAI ,  KAZUKI FUJIWARA ,  KOJI FUNAMI ,  TATSURO SHIRAISHI

IPC: B23K26/03 ,  B23K26/082

Abstract: A laser welding monitoring apparatus includes an acquisition interface that acquires a signal corresponding to measurement light measured by irradiating a workpiece with laser light, an arithmetic circuit that determines the state of processing based on the acquired signal, and a storage device that stores in advance variation tendency information corresponding to a tendency of intensity of the measurement light to vary depending on a position of a processing point in a region scannable with the laser light by using an optical system including a galvanometer mirror and a scan lens on the workpiece. When scanning is performed with the laser light by the optical system in a predetermined welding pattern, and the acquisition interface acquires an intensity signal indicating intensity of the measurement light that has been received, the arithmetic circuit corrects the intensity signal and suppresses a variation in intensity depending on a position of the processing point based on the variation tendency information for each light and determines the state of processing based on the intensity signal that has been corrected.

公开(公告)号：US20250058408A1

公开(公告)日：2025-02-20

申请号：US18935667

申请日：2024-11-04

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： KAZUKI FUJIWARA ,  KOJI FUNAMI ,  IZURU NAKAI ,  TATSURO SHIRAISHI

IPC: B23K26/03 ,  B23K26/21

Abstract: A determination method of a machining condition includes detecting, by using an optical sensor, at least one component of heat radiation, visible light, and reflected light generated at a welded portion provided on a surface of a workpiece by emission of a laser beam on the workpiece, acquiring a signal indicating a change in the at least one component in a time section from a start of welding to an end of welding of the workpiece, calculating a feature quantity based on a signal intensity of the signal in a predetermined section in the time section, determining, as the machining condition, presence or absence of a gap generated between superposed surfaces of the workpiece in an irradiation direction of the laser beam by inputting the calculated feature quantity to a determination model for determining the machining condition, and outputting the determined presence or absence of the gap as a determination result. The determination model is constructed based on training data including the feature quantity calculated under a plurality of conditions in which the machining condition changes and observed presence or absence of the gap in association with each other.

公开(公告)号：US20200212647A1

公开(公告)日：2020-07-02

申请号：US16712841

申请日：2019-12-12

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： SHIGEYUKI MORI ,  KOJI FUNAMI ,  MASAHIRO MORI

IPC: H01S5/00 ,  G02B19/00 ,  G01B11/27

Abstract: A light source measurement apparatus includes an objective lens that collects light emitted from a light source having a plurality of light emission points, a first reflection attenuation filter, a second reflection attenuation filter, a condensing lens, a space filter, and a movable stage, in which the first reflection attenuation filter and the second reflection attenuation filter are disposed such that polarization directions are orthogonal to each other, in which the space filter has an opening through which light emitted from a measurement target light emission point among the plurality of light emission points is transmitted, and in which the opening has a shape in which a dimension of the measurement target light emission point in a fast direction is larger than a dimension of the measurement target light emission point in a slow direction.