公开(公告)号：US20200379112A1

公开(公告)日：2020-12-03

申请号：US16887941

申请日：2020-05-29

Applicant: Mitutoyo Corporation

Inventor： Hiroki UJIHARA ,  Yoshimasa SUZUKI ,  Shinichi HARA

IPC: G01S17/34 ,  G01S7/48 ,  G01S7/481

Abstract: A measurement apparatus, including: a laser apparatus that outputs a frequency-modulated laser beam with a plurality of modes; a branching part that branches the frequency-modulated laser beam into a reference light and a measurement light; a beat signal generation part that generates a plurality of beat signals by mixing the reference light and a reflected light that is reflected by radiating the measurement light onto an object to be measured; a conversion part that converts the plurality of beat signals into digital signals by sampling the beat signals at a frequency greater than or equal to four times a resonator frequency of the laser resonator; and a calculation part that calculates a distance from the measurement apparatus to the object to be measured on the basis of the digital signals is provided.

公开(公告)号：US20200378757A1

公开(公告)日：2020-12-03

申请号：US16881578

申请日：2020-05-22

Applicant: MITUTOYO CORPORATION

Inventor： Akihide KIMURA

IPC: G01B11/26 ,  G02B5/18

Abstract: The optical angle sensor comprises a diffraction unit, a light source, a light receiving unit, and a plurality of reflection units. The diffraction unit includes a first diffraction part for generating combined light and a second diffraction part for diffracting a first light and a second light a plurality of times. The plurality of reflection units includes a first reflection unit, a second reflection unit, a third reflection unit that reflects the first light and the second light through the second diffraction part toward the second diffraction part, fourth reflection unit, and fifth reflection unit. The calculating unit, with the rotation of the diffraction unit, calculates the amount of change in the angle based on the change in the interference signal caused by the combined light generated on the light receiving surface.

公开(公告)号：US10830568B2

公开(公告)日：2020-11-10

申请号：US16148326

申请日：2018-10-01

Applicant: MITUTOYO CORPORATION

Inventor： Yuuto Karasawa ,  Mitsuru Fukuda ,  Kazumi Mizukami

IPC: G01B5/008 ,  G01B21/04

Abstract: An object of the present invention is to provide a measurement device and a measurement system which make it possible to obtain various pieces of driving information and realize accurate analysis of an operation state.A measurement device according to an embodiment comprises: a main body which comprises a probe having a gauge head which can be moved, in a relative manner, relative to an object to be measured, and a move mechanism for moving the gauge head; and a control section which controls driving of the move mechanism, and comprises a generation section for generating driving information of the main body, in association with identification information of the probe, in response to driving of the move mechanism, and a recording section for recording the driving information.

公开(公告)号：US20200334844A1

公开(公告)日：2020-10-22

申请号：US16851302

申请日：2020-04-17

Applicant: Mitutoyo Corporation

Inventor： Kaoru Miyata

IPC: G06T7/60 ,  G06T7/70 ,  G06T7/536

Abstract: A three-dimensional geometry measurement apparatus includes: a relationship identification part that identifies a combination of a first imaging pixel and a second imaging pixel corresponding to the same projection coordinate; a determination part that determines, whether or not at least one of the first imaging pixel or the second imaging pixel is a defective pixel on the basis of a distance between a projection pixel of the projection image; and a geometry measurement part that measures a geometry of an object to be measured using the first imaging pixel or the second imaging pixel corresponding to the combination, for which the first imaging pixel and the second imaging pixel that are determined to be not the defective pixel.

公开(公告)号：US10809100B2

公开(公告)日：2020-10-20

申请号：US16362778

申请日：2019-03-25

Applicant: MITUTOYO CORPORATION

Inventor： Hiroatsu Mori

IPC: G01D5/20

Abstract: An electromagnetic induction type encoder, wherein a detection head has a drive coil generating magnetic flux, wherein a scale has a plurality of connection coils arrayed in a fundamental period λ in a measurement axis direction, are electromagnetically coupled with the magnetic flux generated by the drive coil and generates magnetic flux fluctuating in a predetermined spatial period in the measurement axis direction, wherein the detection head has a plurality of receiver coils arrayed in the fundamental period λ in the measurement axis direction and are electromagnetically coupled with the magnetic flux generated by the plurality of connection coils and detects a phase of the magnetic flux, wherein λ/2−2d

公开(公告)号：US10781856B2

公开(公告)日：2020-09-22

申请号：US16028831

申请日：2018-07-06

Applicant: MITUTOYO CORPORATION

Inventor： Seiichi Otsubo ,  Kenji Ueda

IPC: F16C32/06 ,  G01B5/008 ,  G01B5/00 ,  F16C29/02

Abstract: The present invention relates to improving precision in a gate-type moving device. The gate-type moving device includes: a base, a gate-type moving body that is placed on the base via an air layer and moves on the base in a non-contact state, and an air bearing that forms the air layer, wherein the gate-type moving body is comprised of two leg parts that stand on an upper surface of the base, a beam portion that connects the leg parts, and a beam-direction moving body that moves along the beam portion, the air bearing is provided at a rear surface of at least one of the leg parts, and comprises an air blowout port that opens toward an upper surface of the base and an air suction port that opens toward the upper surface of the base, and the air suction port sucks air around the air suction port.

公开(公告)号：US20200240816A1

公开(公告)日：2020-07-30

申请号：US16746166

申请日：2020-01-17

Applicant: Mitutoyo Corporation

Inventor： Miyako Mizutani

IPC: G01D5/347 ,  G01D11/24 ,  G01D3/028

Abstract: A life detection device of an encoder is used for the encoder including a scale and a head. The scale is housed in a scale frame. The head relatively moves along the scale to detect an amount of relative movement with the scale. The life detection device includes environmental condition detection means, life determination means, and informing means. The environmental condition detection means is configured to detect an environmental condition related to life detection in the encoder. The life determination means is configured to determine a life of a component constituting the encoder based on a detection result by the environmental condition detection means. The informing means is configured to inform the life based on a determination result by the life determination means.

公开(公告)号：US10684109B2

公开(公告)日：2020-06-16

申请号：US16008160

申请日：2018-06-14

Applicant: MITUTOYO CORPORATION

Inventor： Masaoki Yamagata ,  Shiro Igasaki

IPC: G01B3/22 ,  G01B21/04

Abstract: An indicator inspection machine inspects the accuracy of an indicator based on a value displayed by the indicator when a spindle changes position. The indicator inspection machine includes a measurement spindle provided so as to be freely raised and lowered in order to displace the spindle of the indicator; a contact point provided to a distalmost end of the measurement spindle, the contact point making contact with an indicator contact point provided to a distalmost end of the spindle of the indicator; a drive mechanism driving the measurement spindle; and a controller controlling the drive mechanism so as to bring the contact point into contact with the indicator contact point while changing a speed of the measurement spindle at a predetermined periodicity.

公开(公告)号：US10677614B2

公开(公告)日：2020-06-09

申请号：US15943417

申请日：2018-04-02

Applicant: Mitutoyo Corporation

Inventor： Hiroatsu Mori

IPC: G01D5/244 ,  G01D5/20 ,  G01D3/08 ,  G01D5/245 ,  G01D5/347

Abstract: Provided is an encoder that can sense an abnormality in the attitude of a detector with respect to a scale. An encoder includes a scale and a detector, the scale being provided on one measurement target part with marks arranged on the scale, and the detector being provided on another measurement target part and configured to detect an amount of relative movement with the scale. The scale includes a sensing unit that senses the attitude of the detector with respect to the scale, and thus even in a case where an abnormality in the attitude of the detector with respect to the scale cannot be sensed on the basis of a change in a signal read by a reading unit, the abnormality can nevertheless be sensed.

公开(公告)号：US10663629B2

公开(公告)日：2020-05-26

申请号：US15854251

申请日：2017-12-26

Applicant: MITUTOYO CORPORATION

Inventor： Tatsuya Nagahama ,  Yuko Shishido ,  Yuki Kurahashi

IPC: G02B3/14 ,  G02B7/28 ,  G02B7/08

Abstract: A variable focal length lens apparatus includes a lens system where a refractive index changes in response to an input drive signal; a field lens arranged on the same optical axis as the lens system; an image detector detecting an image of a measured object through the lens system and the field lens; a pulse illuminator providing pulse illumination of the measured object based on an input light emission signal; a temperature sensor detecting temperature information for an interior of the lens system; and a controller outputting the drive signal and the light emission signal in addition to correcting the timing of the light emission signal based on the temperature information.