公开(公告)号：US10545102B2

公开(公告)日：2020-01-28

申请号：US15800408

申请日：2017-11-01

Applicant: MITUTOYO CORPORATION

Inventor： Akihito Takahashi ,  Seiji Sasaki

IPC: G01N23/046

Abstract: A coordinate alignment tool includes a base having at least two ground faces to hold an attitude suitable for measurement by a coordinate measuring device and an attitude suitable for measurement by a measuring X-ray CT apparatus, and a fixer to fixate a measured object to the base; and at least three master balls arranged on the base.

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：US10527397B2

公开(公告)日：2020-01-07

申请号：US15855805

申请日：2017-12-27

Applicant: Mitutoyo Corporation

Inventor： Michael Nahum

IPC: G01B3/22

Abstract: A first position measurement device (“FPMD”) is configured to control and operate both standalone and combined device operating modes. During the combined device operating mode, the FPMD inputs second-device measurement sample outputs provided by a second position measurement device (“SPMD”) via an inter-device communication connection. The FPMD and the SPMD are held in a fixed relationship in a workpiece measurement arrangement (e.g., with transverse measuring axes). Concurrent measurement data sets are determined as including at least a first-device measurement sample output from the FPMD and a second-device measurement sample output from the SPMD corresponding to concurrent first-device and second-device sample periods. Each concurrent measurement data set is associated with a corresponding measurement sample region on the workpiece. A combined measurement data output (e.g., as output and/or displayed by the FPMD) is provided for the current measurement sample region on the workpiece based on the corresponding concurrent measurement data set.

公开(公告)号：US20200003581A1

公开(公告)日：2020-01-02

申请号：US16021528

申请日：2018-06-28

Applicant: Mitutoyo Corporation

Inventor： Ted Staton Cook ,  James Allen Hitchman ,  Yoshiaki Kato

IPC: G01D5/20

Abstract: An inductive type position encoder includes a scale, a detector portion and a signal processor. The scale includes a periodic pattern of signal modulating elements (SME) arranged along a measuring axis, with a spatial wavelength W1. One type of SME in the pattern comprises similar conductive plates or loops. The detector portion comprises sensing elements and a field generating coil that generates a changing magnetic flux. The sensing elements may comprise conductive loop portions arranged along the measuring axis and configured to provide detector signals which respond to a local effect on the changing magnetic flux provided by adjacent SME's. In various implementations, the first type of SMEs have an average dimension DSME along the measuring axis direction that is greater than DSEN and at least .55*W1 and at most 0.8*W1, which provides advantageous detector signal characteristics.

公开(公告)号：US20190355281A1

公开(公告)日：2019-11-21

申请号：US16407549

申请日：2019-05-09

Applicant: Mitutoyo Corporation

Inventor： Shinsaku Abe

IPC: G09B25/02 ,  G09B5/02 ,  H04N13/344 ,  G02B27/01 ,  G06T13/40

Abstract: A learning support system of the present invention is a learning support system that supports learning of work using a real measuring machine for measuring a measurement object, including a position and attitude recognition unit that recognizes a position and/or an attitude of an object within a real three-dimensional space; a storage unit that stores learning data that defines exemplary work performed by an avatar using a virtual measuring machine within a virtual three-dimensional space; a stereoscopic video generation unit that generates a three-dimensional video of the exemplary work performed by the avatar, based on the position and/or the attitude of the object recognized by the position and attitude recognition unit, as well as the learning data stored in the storage unit; and a head-mounted display that is mounted on a learner's head, and displays the three-dimensional video so as to be superimposed on the real three-dimensional space.

公开(公告)号：US10474516B2

公开(公告)日：2019-11-12

申请号：US15598929

申请日：2017-05-18

Applicant: Mitutoyo Corporation

Inventor： Naoki Kobayashi

IPC: G06F11/07 ,  G01D5/245 ,  G01D5/244

Abstract: An encoder includes: a reading device that reads respective electric signals from two incremental patterns respectively having graduation array pitches different from each other; a control device that calculates a measurement value, based on the electric signals; and an output device that outputs the measurement value. The control device includes: an absolute position synthesis unit that synthesizes two electric signals to generate a synthesized absolute position; a detection unit that detects two relative positions from the two electric signals; a position calculation unit that performs an arithmetic operation between the relative positions and the synthesized absolute position to calculate a calculated absolute position; an absolute position comparison unit that compares the calculated absolute position with the synthesized absolute position; and a relative position comparison unit that compares the two relative positions with each other. The output device outputs error information, based on a comparison result output from the control device.

公开(公告)号：US20190323834A1

公开(公告)日：2019-10-24

申请号：US16380335

申请日：2019-04-10

Applicant: MITUTOYO CORPORATION

Inventor： Hisayoshi SAKAI ,  Junsuke YASUNO ,  Ryosuke WATANABE

IPC: G01B21/30 ,  G01B21/20 ,  G12B5/00 ,  B23Q1/64

Abstract: A rotary disk rotatable around a vertical rotation axis; a bearing supporting the rotary disk so as to be freely rotatable; a slide disk slidable on a top surface of the rotary disk; a position adjustment bracket that displaces the slide disk along the top surface of the rotary disk; a placement disk that is supported by the slide disk; a plurality of air nozzles that are arranged on a top surface of the stator in an annular shape centered on the rotation axis, and form a static pressure air film between the top surface of the stator and a bottom surface of the rotary disk; an aerostatic pocket formed between the top surface of the rotary disk and a bottom surface of the slide disk; and a communication aperture is formed on the rotary disk and introduces pressure of the static pressure air film into the aerostatic pocket.

公开(公告)号：US10429166B2

公开(公告)日：2019-10-01

申请号：US15680653

申请日：2017-08-18

Applicant: MITUTOYO CORPORATION

Inventor： Hideyuki Nakagawa ,  Nobuhiro Ishikawa

IPC: G01B5/008 ,  G01B3/22 ,  G01B21/04

Abstract: A processing device includes: a coordinate acquisition unit that acquires a moving amount of a measuring probe and a probe output; a matrix generation unit that generates a correction matrix including linear correction elements and non-linear correction elements; and a probe output correction unit that corrects the probe output with the correction matrix. The coordinate acquisition unit acquires the moving amount and the probe output of the measuring probe in each of measurement points in a quantity larger than or equal to the sum of the number of the linear correction elements and the number of the non-linear correction elements. Consequently, a non-linear error of the probe output supplied from the measuring probe can be corrected, and thus shape coordinates of an object to be measured can be obtained with high accuracy.

公开(公告)号：US20190287274A1

公开(公告)日：2019-09-19

申请号：US16299513

申请日：2019-03-12

Applicant: MITUTOYO CORPORATION

Inventor： Kozo ARIGA ,  Gyokubu CHO ,  Hidemitsu ASANO ,  Masato KON

IPC: G06T11/00 ,  G01N23/046

Abstract: When generating a measurement plan for measuring X-ray CT that performs X-ray irradiation while rotating a test object, and in doing so acquires projection image data, reconstructs volume data from the projection image data, and measures a targeted measurement location in the volume data, the present invention calculates required measurement accuracy and a measurement field of view range based on tolerance information included in CAD data of the test object and a measurement location on the test object defined by a measurement operator ahead of time, and automatically generates, from this information, an optimized measurement plan that minimizes the number of measurements.

公开(公告)号：US20190271898A1

公开(公告)日：2019-09-05

申请号：US16291357

申请日：2019-03-04

Applicant: MITUTOYO CORPORATION

Inventor： Hiroshi SAKAI

IPC: G02F1/29

Abstract: In a variable focal length lens control method, a plurality of candidate planes are defined at different focal lengths of a variable focal length lens, an image of a measurable object is detected by an image detector at each of the candidate planes, contrast in each of the detected images is calculated, any of the candidate planes is selected based on the contrast, and a focal length of the selected candidate plane is defined for a lens controller.