公开(公告)号：US20170248410A1

公开(公告)日：2017-08-31

申请号：US15440118

申请日：2017-02-23

Applicant: MITUTOYO CORPORATION

Inventor： Hiroshi SAKAI ,  Yutaka WATANABE ,  Yasuhiro TAKAHAMA ,  Harumasa ITO ,  Yuji KUDO

IPC: G01B11/24 ,  G01B11/30 ,  G01B11/14

CPC classification number: G01B11/2441 ,  G01B11/14 ,  G01B11/303 ,  G01B21/04 ,  G01B2210/52

Abstract: According to an embodiment of the present invention, a method of measuring a surface of an object having a curved shape by measuring a distance from a measurement head to the object, includes: setting a measuring region of the object and a threshold value of concave and convex; acquiring shape reference data including the curved shape of the object; acquiring three-dimensional data of the surface of the object by measuring the distance between the object in the measuring region and the measurement head; acquiring curve removed data by removing the shape reference data from the three-dimensional data; calculating second reference data by calculating first reference data based on the curve removed data, by removing data exceeding the threshold value with respect to the first reference data, from the curve removed data, and by averaging the curve removed data; and calculating shape data of the concave and convex.

公开(公告)号：US20220412727A1

公开(公告)日：2022-12-29

申请号：US17780735

申请日：2020-11-26

Applicant: Machine Vision Lighting Inc. ,  MITUTOYO CORPORATION

Inventor： Shigeki MASUMURA ,  Yasuhiro TAKAHAMA ,  Jyota MIYAKURA ,  Masaoki YAMAGATA

IPC: G01B11/24 ,  G01N21/88 ,  G01N21/95

Abstract: An illumination device has a light source unit, a lens unit, and a filter unit An imaging device receives object light, generated by the illumination light, from the measurement object at a predetermined observation solid angle, and pixels of the imaging device can each identify the different light wavelength ranges. A processing device includes an arithmetic unit configured to obtain a normal vector at each point of the measurement object corresponding to each pixel from inclusion relation between the plurality of solid angle regions, constituting the object light, and the predetermined observation solid angle, and a shape reconstruction unit configured to reconstruct the shape of the measurement object.

公开(公告)号：US20170248399A1

公开(公告)日：2017-08-31

申请号：US15439120

申请日：2017-02-22

Applicant: MITUTOYO CORPORATION

Inventor： Yasuhiro TAKAHAMA

IPC: G01B3/22 ,  G01B11/14

CPC classification number: G01B3/22 ,  G01B5/003 ,  G01B5/061 ,  G01B5/12 ,  G01B11/0608 ,  G01B11/12 ,  G01B11/14 ,  G01B11/2441 ,  G01M15/042 ,  G01N21/954

Abstract: An inner-wall measuring instrument includes: a placement surface on which an object to be measured is placed; a base relatively movable with respect to the placement surface in three axis directions orthogonal to one another; a touch probe that is disposed at a first position of the base and brought into contact with the object; an image probe that is disposed at a second position of the base and capable of imaging the object with a direction parallel to the placement surface being an imaging direction; a rotational drive unit that rotates the image probe around an axis extending in a direction perpendicular to the placement surface; a linear drive unit that moves the image probe in the imaging direction; and a calculator that calculates an offset amount between the touch probe disposed at the first position and the image probe disposed at the second position.

公开(公告)号：US20190113333A1

公开(公告)日：2019-04-18

申请号：US16161571

申请日：2018-10-16

Applicant: MITUTOYO CORPORATION

Inventor： Yasuhiro TAKAHAMA

IPC: G01B11/24 ,  H04N5/225 ,  G01B9/02

CPC classification number: G01B11/2441 ,  G01B5/003 ,  G01B9/02068 ,  G01B9/02085 ,  G01B11/24 ,  G01B21/042 ,  G01B2210/52 ,  H04N5/2258 ,  H04N17/002

Abstract: The present invention includes a preparatory step of providing a calibration work piece having a flat reflecting surface as a work piece, and arranging the reflecting surface to be parallel to a standard optical axis and orthogonal or parallel to pixel array directions of an image capture element; a rotation step of rotating a prism centered on the standard optical axis; a brightness detection step of detecting the brightness of an image captured by the image capture element at each of a plurality of rotation positions of the prism; and a positioning step of aligning the prism at a rotation position where the brightness detected by the brightness detection step is greatest.

公开(公告)号：US20140109420A1

公开(公告)日：2014-04-24

申请号：US14056321

申请日：2013-10-17

Applicant: MITUTOYO CORPORATION

Inventor： Masaki KURIHARA ,  Yasuhiro TAKAHAMA ,  Masanori ARAI ,  Tomoyuki MIYAZAKI

IPC: G01B5/016

CPC classification number: G01B5/016 ,  G01B5/012 ,  G01B7/012 ,  G01B21/042

Abstract: A double cone stylus includes a shank and a double cone-shaped tip attached to the tip end of the shank, the double cone-shaped tip being a rotationally symmetric body obtained by rotating a triangle having a base extending along the shank around the shank as the symmetric rotation axis. The double cone stylus allows the shape of an inner wall surface of a measurement object with the inner wall surface retracted from an upper reference plane to be measured from above.

Abstract translation: 双锥形触针包括固定在柄的末端的柄和双锥形末端，双锥形末端是旋转对称体，通过旋转具有沿着柄周围的柄延伸的基部的三角形而获得， 对称旋转轴。 双锥形触针允许从上方测量内壁表面从上参考平面缩回的测量对象的内壁表面的形状。