Honda Motor Co., Ltd.

Kajima Corporation

Nippon Kouatsu Electric Co., Ltd.

Toshihiko Kubota

Hideo Tanaka

Takuji Kobori

Takashi Kimura

Shigeru Ban

Norihide Koshika

Koji Kondo

Yoshinori Kitamura

Hiroomi Sato

Osamu Kawanabe

Atsushi Okuda

Osamu Nohira

Sadaaki Masuda

A Scott Howe

The device has a processor () that applies a magnetic field to a measurement subject () and after the magnetic field is discontinued, uses an induced electromotive force detector () to measure the magnetic fluxes emitted from multiple locations, calculates time constants of transient change of the plurality of magnetic fluxes, and detects the internal structure of the measurement subject () from the distribution of the time constants. The processor () prompts the induced electromotive force detector () to make first measurements at predetermined locations, prompts the induced electromotive force detector () to make second measurements at locations rotated by a predetermined angle from the predetermined locations, and based on the internal structure detected by the first measurements and the internal structure detected by the second measurements, estimates the center location of the nugget and/or the diameter of the nugget which has been formed inside the measurement subject ().

Non-destructive testing device for testing a welded region of a workpiece

Ultra-high multi-story buildings and construction thereof

Growing community of inventors

Tokyo, Japan

Toshihiko Kubota