Ihi Corporation

Ihi Infrastructure Systems Co., Ltd.

Hiroki Kawai

Hiroaki Hatanaka

Yuichi Yamaguchi

Koichi Inagaki

Akinori Tsuda

Arisa Yanagihara

Takahiro Yamagami

Kunio Yonekura

Yuji Takeda

Provided are a method and device for detecting arrangement disorder of fibers in a conductive composite material. A coil () is disposed at a position at which the coil () faces the conductive composite material, and thereby a current can be applied to the conductive composite material. Thus, work or the like for attaching electrodes to the conductive composite material is not required. As a result, the arrangement disorder of the fibers in the conductive composite material can easily be detected. A method for detecting meandering of fibers in a conductive composite material includes a step of disposing a magnetic field sensor () at a position at which the magnetic field sensor () faces a surface (Sa) of the conductive composite material such that a direction (D) of a magnetosensitive axis is horizontal with the surface (Sa) and is parallel to coil faces (). Therefore, the magnetic field sensor () measures a magnetic field, and thereby a portion at which the arrangement disorder of the fibers in the conductive composite material is present can be detected.

Method for detecting arrangement disorder of fibers in conductive composite material, and device for detecting arrangement disorder of fibers in conductive composite material

Provided is a method for inspecting an electroconductive composite material including disposing a detection magnetic field measurement unit, disposing a correction magnetic field measurement unit, applying a current, acquiring a detection magnetic field strength, acquiring a correction magnetic field strength, and detecting a portion in which arrangement of carbon fibers is disordered. The operation includes calculating a correction coefficient using the correction magnetic field strength and correcting the detection magnetic field strength using the correction coefficient.

Method for inspecting electroconductive composite material and device for inspecting electroconductive composite material

A method for measuring the degree of fusion involves: a step for creating a dividing pulse amplitude curve by using a probe that emits ultrasound beams; a step for scanning the probe that emits ultrasound beams at a predetermined angle on a surface that has weld beads of multiple welding specimens having different degrees of fusion and for obtaining beam path length information from the dividing pulse amplitude curve and the height of an F echo that returned to the probe after hitting the fused section of a welding site; and a step for obtaining a regression formula expressing the relationship between the beam path length information and the degree of fusion.

Method for measuring height of lack of penetration and ultrasonic flaw detector

Growing community of inventors

Koto-ku, Japan

Hiroki Kawai