公开(公告)号：US20230062780A1

公开(公告)日：2023-03-02

申请号：US17893791

申请日：2022-08-23

Applicant: MITUTOYO CORPORATION

Inventor： Naoki MITSUTANI

IPC: B25J9/16 ,  B25J19/02 ,  G06T7/60 ,  G06T7/73

Abstract: A measurement system includes a multi-axis robot, a measurement unit coupled to the multi-axis robot, and a data processing apparatus, wherein the measurement unit includes one or more imaging devices movable with respect to a reference position of the multi-axis robot, and a position specification device for specifying a position of one or more of the imaging devices with respect to the reference position, wherein the data processing apparatus includes an acquisition part for acquiring a plurality of pieces of captured image data generated by having one or more of the imaging devices capture images at two or more positions, and a measurement part for measuring a distance between the plurality of feature points in a workpiece on the basis of a position of the feature point of the workpiece included in the plurality of pieces of captured image data.

公开(公告)号：US11543225B2

公开(公告)日：2023-01-03

申请号：US17324515

申请日：2021-05-19

Applicant: MITUTOYO CORPORATION

Inventor： Kohei Fuchigami ,  Osamu Saito ,  Keisuke Iori

IPC: G01B3/00 ,  G01B3/18 ,  G01B3/20

Abstract: A caliper measurement force detecting device includes a fixed unit that is securely attached to a slider so as not to displace relative to the slider; a movable unit that is provided to allow a slight displacement relative to the fixed unit along a direction parallel to a displacement direction of the slider; and pressure detectors that are arranged between the fixed unit and the movable unit and are provided so as to detect pressure applied in the direction parallel to the displacement direction of the slider. The movable unit includes an alternative finger hook that is arranged near a finger hook of the slider and serves as an operator that pushes and pulls the slider instead of the finger hook of the slider.

公开(公告)号：US11530911B2

公开(公告)日：2022-12-20

申请号：US16825233

申请日：2020-03-20

Applicant: Mitutoyo Corporation

Inventor： Ryoichi Imaizumi ,  Ichiro Taniguchi

IPC: G01B11/08 ,  G01B11/24

Abstract: An optical measuring device includes: an emission device configured to emit a scanning light, of which an optical axis parallelly moves, to an object; a light receiving element configured to perform photoelectric conversion with respect to the scanning light after passing over the object; a calculation device configured to calculate, from a voltage wave obtained from time change of an electrical signal that is output by the light receiving element, a distance corresponding to a time range from a first edge with respect to a voltage value where the scanning light is not interrupted by the object and a second edge with respect to a voltage value where the scanning light is interrupted by the object, when a part of the scanning light is interrupted by the object for the time range.

公开(公告)号：US11530908B2

公开(公告)日：2022-12-20

申请号：US16558730

申请日：2019-09-03

Applicant: MITUTOYO CORPORATION

Inventor： Takeshi Hagino ,  Yuto Inoue ,  Masayuki Nara

IPC: G01B5/008 ,  G06F17/15

Abstract: A measurement point determination method for determining the number or an arrangement of measurement points for a measurement apparatus that performs measurement processing of a measurement item at a plurality of measurement points, the method comprises the steps of acquiring a minimum value and a maximum value of the number of measurement points, acquiring a target value of uncertainty for the measurement item of the measurement apparatus, estimating uncertainties when the measurement item is measured by the measurement apparatus using two or more of the numbers of measurement points between the minimum value and the maximum value of the number of measurement points, and determining the number of measurement points of the measurement apparatus on the basis of the target value and the estimated uncertainties.

公开(公告)号：US20220400543A1

公开(公告)日：2022-12-15

申请号：US17839091

申请日：2022-06-13

Applicant: MITUTOYO CORPORATION

Inventor： Tadashi YAMAZAKI ,  Yuto KONNO ,  Hideki MORITA ,  Nobuya KANEKO ,  Satoru HIRASAWA

IPC: H05B45/34 ,  H05B45/18 ,  H05B45/56

Abstract: An illuminator includes: a light emitter including a light-emitting diode; a temperature sensor configured to detect a current temperature of the light emitter; and an illumination controller configured to adjust a drive voltage being supplied to the light emitter in accordance with the current temperature. The illumination controller includes a reference temperature storage in which a reference temperature is stored in advance and is configured to adjust the drive voltage by detecting the current temperature from the temperature sensor on a constant time cycle and comparing the current temperature with the reference temperature.

公开(公告)号：US11525664B2

公开(公告)日：2022-12-13

申请号：US17380551

申请日：2021-07-20

Applicant: MITUTOYO CORPORATION

Inventor： Masayuki Nara

IPC: G01B11/02 ,  G01B9/02055 ,  G01B11/00 ,  G01B11/14 ,  G01B9/02001

Abstract: A calibration method includes the steps of placing a structure to be measured at a first position, measuring a first distance from a laser interferometer to a reflector, and measuring first coordinates of a body to be measured, moving the structure to be measured to a second position, measuring a second distance from the laser interferometer to the reflector and measuring second coordinates of the structure to be measured with the coordinate measuring apparats, while the structure to be measured is at the second position, determining a scale error of the reference instrument, mounting the reference instrument, measuring the interval between objects to be measured, and calculating a calibration value of the interval between the objects to be measured.

公开(公告)号：US11523042B2

公开(公告)日：2022-12-06

申请号：US17012262

申请日：2020-09-04

Applicant: MITUTOYO CORPORATION

Inventor： Yuki Kurahashi

IPC: H04N5/232 ,  H05B47/105 ,  G02F1/29

Abstract: An image detection device includes a liquid resonant lens system whose focal point is cyclically changeable; an image detector configured to detect a detection image in a to-be-imaged region through the lens system; a pulsed illuminator configured to emit pulsed light on the to-be-imaged region in synchronization with the focal point; and an illumination controller configured to increase or decrease an illumination duration of the pulsed illuminator depending on a required light volume of the to-be-imaged region at the focal point where the pulsed illuminator emits pulsed light.

公开(公告)号：US20220382033A1

公开(公告)日：2022-12-01

申请号：US17752304

申请日：2022-05-24

Applicant: MITUTOYO CORPORATION

Inventor： Takashi Honma ,  Yasushi Fukumoto

IPC: G02B21/04 ,  G02B21/08 ,  G02B21/36 ,  G02B3/00 ,  G02B27/10

Abstract: A microscope unit comprises: a main lens barrel of an imaging optical system; and an illumination lens barrel of an illumination optical system connected to the main lens barrel, the illumination optical system having: a collector lens that collects light that has been irradiated from a light source; a fly-eye lens allowing to be transmitted therethrough light from the collector lens; a first relay lens having lenses that relay light from the fly-eye lens; a field stop that stops down a range of light from the first relay lens; a second relay lens that relays to a beam splitter light from the first relay lens; and the beam splitter guiding at least a part of light incident thereon to the objective lens and allowing to be transmitted therethrough to a side of an imaging sensor at least a part of light incident thereon from the objective lens.

公开(公告)号：US11510643B2

公开(公告)日：2022-11-29

申请号：US17024061

申请日：2020-09-17

Applicant: MITUTOYO CORPORATION

Inventor： Hidemitsu Asano ,  Masato Kon

IPC: A61B6/00 ,  A61B6/03 ,  A61B6/04

Abstract: Volume data is generated by performing a CT scan with a spherical calibration jig having known dimensions in contact with an object. A profile of the surface shape of the object in the volume data is obtained, and a boundary surface of the spherical calibration jig is calculated from the center coordinates of the spherical calibration jig. A correction value for adjusting a boundary surface of the object determined from the gradient of the profile to the boundary surface of the spherical calibration jig is determined, and the boundary surface of the object is corrected by using the correction value. The shape of the object is determined by using the corrected boundary surface. The precision of measurement X-ray CT can thus be increased by accurately detecting the boundary surface of the object.

公开(公告)号：US11506518B2

公开(公告)日：2022-11-22

申请号：US17529476

申请日：2021-11-18

Applicant: Mitutoyo Corporation

Inventor： Yoshiaki Kato ,  Miyako Mizutani

IPC: G01D5/34 ,  G01D5/347

Abstract: The photoelectric rotary encoder includes: a generally disk-shaped scale with a grating-like pattern formed with a predetermined period along a measurement direction, the measurement direction being a direction of rotation of a measurement target that rotates on a predetermined axis, the scale being plate-like and centered on an axis of rotation; and a head that detect, from the scale, the amount of displacement caused by the rotation of the measurement target. The head includes a light source, a diffraction unit with grating parts, and a light-receiving unit with light-receiving elements. The grating parts of the diffraction unit are formed as deformed grating parts that spread cut wide, from the center on the axis of rotation, along the grating-like pattern of the scale. The light-receiving elements are formed as linear grating parts.