公开(公告)号：US20200011662A1

公开(公告)日：2020-01-09

申请号：US16455883

申请日：2019-06-28

Applicant: THE UNIVERSITY OF TOKYO ,  MITUTOYO CORPORATION

Inventor： Yutaka OHTAKE ,  Tasuku ITO ,  Tomonori GOTO ,  Masato KON

IPC: G01B15/02 ,  G01N23/046

Abstract: In measuring a dimension of an object to be measured W made of a single material, a plurality of transmission images of the object to be measured W are obtained by using an X-ray CT apparatus, and then respective projection images are generated. The projection images are registered with CAD data used in designing the object to be measured W. The dimension of the object to be measured W is calculated by using a relationship between the registered CAD data and projection images. In such a manner, high-precision dimension measurement is achieved by using several tens of projection images and design information without performing CT reconstruction.

公开(公告)号：US20150143707A1

公开(公告)日：2015-05-28

申请号：US14546356

申请日：2014-11-18

Applicant: Mitutoyo Corporation

Inventor： Tomonori GOTO

IPC: G01B5/012 ,  G01L5/16

CPC classification number: G01L5/16 ,  G01B5/008 ,  G01B21/04 ,  G01L5/226 ,  G05B2219/39186 ,  G05B2219/40586 ,  G05B2219/40599

Abstract: An arm type three-dimensional measuring apparatus includes: a multi-jointed arm mechanism including a probe in a distal end; a processing part for computing a position of the probe, the probe being manually moved; a sensor which is formed in each axis of the multi-jointed arm mechanism and detects at least a force in one predetermined direction and torques in two predetermined axial directions generated in an attitude state of the multi-jointed arm mechanism, wherein the processing part computes a deflection amount in each axis of the multi-jointed arm mechanism based on an output of the sensor and sequentially computes a position of the probe based on the deflection amount.

Abstract translation: 臂型立体测量装置包括：多接头臂机构，其包括在远端的探针; 用于计算探头的位置的处理部件，所述探针被手动移动; 传感器，其形成在所述多关节臂机构的各轴上，并且在所述多关节臂机构的姿态下产生的至少一个预定方向上的力并且以两个预定轴向方向转动，其中，所述处理部计算 基于传感器的输出，多接头臂机构的各轴的偏转量，基于偏转量依次计算探头的位置。

公开(公告)号：US20200013200A1

公开(公告)日：2020-01-09

申请号：US16455912

申请日：2019-06-28

Applicant: THE UNIVERSITY OF TOKYO ,  MITUTOYO CORPORATION

Inventor： Yutaka OHTAKE ,  Tomonori GOTO ,  Masato KON

IPC: G06T11/00 ,  G06T3/40

Abstract: Projection images of reduced resolution are generated by reducing resolution of filtered projection images and/or reducing the number of filtered projection images. Volume data of reduced resolution is generated by performing CT reconstruction using the projection images of reduced resolution. Each voxel of the volume data of reduced resolution is provisionally divided. The provisionally divided voxels are compared in voxel value before and after provisional division. If a difference in voxel value before and after the provisional division is greater than a threshold, the provisional division is determined to be valid, and division is further continued. If the difference in voxel value before and after the provisional division is less than or equal to the threshold, the provisional division is determined to be invalid and the voxel ends being divided.

公开(公告)号：US20200175758A1

公开(公告)日：2020-06-04

申请号：US16676943

申请日：2019-11-07

Applicant: THE UNIVERSITY OF TOKYO ,  MITUTOYO CORPORATION

Inventor： Yutaka OHTAKE ,  Yukie NAGAI ,  Tomonori GOTO ,  Seiji SASAKI ,  Masato KON

IPC: G06T17/20

Abstract: An isosurface mesh M is generated by extracting voxels having a certain CT value from volume data obtained by X-ray CT. A gradient vector g of a CT value is calculated at each vertex p of the isosurface mesh M. A plurality of sample points S are generated in positive and negative directions of the calculated gradient vector g. Gradient norms N of CT values at the respective generated sample points S are calculated. The vertex p of the isosurface mesh is moved and corrected to a sample point Sm having the maximum norm Nm calculated.

公开(公告)号：US20170248409A1

公开(公告)日：2017-08-31

申请号：US15439019

申请日：2017-02-22

Applicant: MITUTOYO CORPORATION

Inventor： Hiroshi SAKAI ,  Tomonori GOTO

IPC: G01B11/24

CPC classification number: G01B11/2441 ,  G01B2210/52

Abstract: According to an embodiment of the present invention, a method of measuring a shape based on reflected light from a surface of an object irradiated with light from a measurement head, includes: acquiring a first measurement result by setting a measurement condition suitable for the measurement of a first region of the object and by measuring a first scanning range of the surface with a first scanning pitch; determining a second region of the surface except the first region from the first measurement result; and acquiring a second measurement result by setting a measurement condition suitable for the measurement of the second region and by measuring a second scanning range of the surface narrower than the first scanning range with a second scanning pitch finer than the first scanning pitch.

公开(公告)号：US20150113820A1

公开(公告)日：2015-04-30

申请号：US14523138

申请日：2014-10-24

Applicant: MITUTOYO CORPORATION

Inventor： Tomonori GOTO

IPC: G01B5/008 ,  G01C9/00

CPC classification number: G01B5/008 ,  G01B21/045

Abstract: An arm type three-dimensional measuring machine includes: a multi-jointed arm mechanism comprising a probe in a distal end; a processing part for computing a position of said probe; and an inclinometer configured to detect an inclination amount of a base part from a vertical direction in the base part for supporting the multi-jointed arm mechanism, wherein the processing part computes a position of the probe using the base part as a criterion and corrects the position of the probe using the base part as the criterion in a time-series manner based on an output from the inclinometer.

Abstract translation: 臂型三维测量机包括：多接头臂机构，其包括在远端的探针; 用于计算所述探针的位置的处理部分; 以及倾斜计，被配置为在用于支撑多关节臂机构的基部中检测基部的垂直方向的倾斜量，其中，处理部使用基部来计算探头的位置作为标准， 基于来自倾斜计的输出，以时间序列方式使用基部的探头的位置作为标准。