Ngk Insulators, Inc.

Tadayoshi Yasui

Yoshihiro Sato

Akihiro Mizutani

Takeshi Komaki

There is disclosed a method of inspecting the outer wall of a honeycomb structure body which can be performed without relying on human sensory functions and in which a defect detection level and an inspection time per honeycomb structure body are constant, so that stable inspection can be performed. In a method of inspecting the outer wall of a honeycomb structure bodymade of a ceramic material, while rotating the honeycomb structure body, the outer wall of the honeycomb structure bodyis imaged by a line camera, and the thus obtained image is processed to judge whether or not a defect is present in the outer wall of the honeycomb structure body

Method of inspecting outer wall of honeycomb structure body

A shape-measuring devicemeasures the shape of a object to be measuredin which segments are arranged and bonded in rows while relatively moving the objectin one direction. The shape-measuring device includes rollersprovided corresponding to the rows of segments and displaced to follow unevenness of an end faceof the object while being rotated on the end facedue to the relative movement, detection meansprovided corresponding to each rollerand detecting the amount of displacement of each roller, and calculation meansfor calculating shape data of the objectbased on the amount of displacement of the rollerdetected by the detection means. The shape-measuring devicecan accurately and promptly measure the shape of the object such as a DPF in which segments are bonded in rows.

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Nagoya, Japan

Tadayoshi Yasui