公开(公告)号：US20170199080A1

公开(公告)日：2017-07-13

申请号：US15392791

申请日：2016-12-28

Applicant: JTEKT CORPORATION

Inventor： Naoki MATSUMOTO ,  Kouya YOSHIDA ,  Ryota UMEZAWA ,  Jun MATSUMOTO

IPC: G01J5/00 ,  G01J5/52

CPC classification number: G01J5/0096 ,  G01J5/0007 ,  G01J5/52 ,  G01J2005/528 ,  G01N25/72

Abstract: An optical nondestructive testing method includes: a laser emitting step involving emitting a heating laser from a laser output device such that the intensity of the heating laser applied to a measurement point changes sinusoidally; a laser intensity measuring step involving measuring the intensity of the heating laser by a phase difference detector; an infrared radiation intensity measuring step involving measuring, by the phase difference detector, the intensity of infrared radiation radiating from the measurement point; a phase difference measuring step involving determining, by the phase difference detector, a phase difference between the intensity of the heating laser and the intensity of the infrared radiation, and outputting the phase difference determined to a determiner from the phase difference detector; and a connection area calculating step involving determining, by the determiner, a connection area in accordance with the phase difference and phase difference-connection area correlation information.

公开(公告)号：US20190022792A1

公开(公告)日：2019-01-24

申请号：US16032364

申请日：2018-07-11

Applicant: JTEKT CORPORATION

Inventor： Naoki MATSUMOTO ,  Ryota UMEZAWA ,  Daisuke KURODA ,  Hiroshi OHARA

IPC: B23K26/03 ,  B23K26/211 ,  B23K26/06

Abstract: An optical non-destructive inspection method includes: a heating laser emission step; an information acquisition step of acquiring measurement point information and heating laser information; a joint state determination step of determining the joint state on the basis of the measurement point information and the heating laser information; and a preliminary heating step, which is performed before the heating laser emission step, of causing thermal distortion in a first member by irradiating a measurement point, or a preliminary heating range that includes the measurement point, or a preliminary heating point set in the preliminary heating range, with preliminary heating laser adjusted to a thermal distortion generation intensity, which is a constant output intensity, and an irradiation time such that the thermal distortion is caused without destroying the first member.