The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 21, 2016
Filed:
Feb. 07, 2013
Ihi Corporation, Koto-ku, Tokyo, JP;
Michiko Baba, Tokyo, JP;
Kouzou Hasegawa, Tokyo, JP;
Norimasa Taga, Tokyo, JP;
Tooru Fujii, Tokyo, JP;
IHI Corporation, Tokyo, JP;
Abstract
The invention relates to an inner diameter measuring device, having a non-contact measuring unit () and a contact measuring unit () arranged along the same center line, wherein the non-contact measuring unit comprises an image pickup unit () arranged on the center line, a laser beam emitting unit (), and a laser beam diffusing unit () having a cone mirror, wherein a laser beam projected from the laser beam emitting unit to the cone mirror is reflected over a total circumference by the cone mirror, the image pickup unit takes an optical ring which is formed by projecting the reflected laser beam to an inner surface of a hollow portion, at least one of an inner diameter or a shape of the inner surface is measured based on an image picked up, and wherein the contact measuring unit comprises a contact measuring head () and a circulation unit () for circulating the contact measuring head around the center line, wherein the contact measuring head has a contact measuring unit having a contact at a forward end and for detecting a displacement of the contact, an advancing/retreating unit for advancing and retreating the contact measuring unit in radial direction, and a scale unit for measuring an advancing/retreating distance of the contact measuring unit.