公开(公告)号：US20230294214A1

公开(公告)日：2023-09-21

申请号：US17897567

申请日：2022-08-29

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Takashi USUI ,  Keisuke UENO ,  Mamoru SHIBUYA ,  Souichi HANAFUSA ,  Tatsuhiko SAKAGUCHI

IPC: B23K31/12 ,  B23K20/10 ,  G01N29/04

CPC classification number: B23K31/125 ,  B23K20/10 ,  G01N29/043 ,  B23K31/006

Abstract: An ultrasonic welding diagnostic method includes: applying a pressing force to an object to be joined so as to generate a surface pressure on a joint surface of the object to be joined; inputting ultrasonic waves to the joint surface; detecting an elastic wave propagating through the object to be joined by at least one sensor at a plurality of different positions; analyzing a signal detected by the sensor to generate an envelope of the signal and calculating information about the envelope; and determining a joint state on the joint surface based on the calculation result of the information.