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公开(公告)号：US11353312B2
公开(公告)日：2022-06-07
申请号：US17009304
申请日：2020-09-01
Applicant: MITUTOYO CORPORATION
Inventor： Naoki Izumi
Abstract: There is provided a roughness tester that improves measurement efficiency and roughness measurement accuracy.
A roughness tester includes a stylus unit including a stylus that is provided in such a manner as to protrude from and retract into a through hole of a skid and performs scanning movement along a surface of a workpiece, and a stylus displacement detecting unit that detects displacement of the stylus, and a drive unit that moves the stylus unit forward and backward in a drive-axis direction. The roughness tester further includes a height detector that is provided in such a manner as to face a front end face of the main-body housing part, interposing the skid between the height detector and the front end face and that detects a height of an object in a direction parallel with a measurement axis. When the height detector detects the object at the same height of the height of the main-body support foot in the measurement axis direction, the drive unit automatically starts driving in order for the stylus unit to perform scanning measurement of the surface of the workpiece.-
公开(公告)号：US20220170764A1
公开(公告)日：2022-06-02
申请号：US17529476
申请日：2021-11-18
Applicant: Mitutoyo Corporation
Inventor： Yoshiaki Kato , Miyako Mizutani
IPC: 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.
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公开(公告)号：US11344276B2
公开(公告)日：2022-05-31
申请号：US17015618
申请日：2020-09-09
Applicant: MITUTOYO CORPORATION
Inventor： Masato Kon , Hiromu Maie , Seiji Sasaki , Jyota Miyakura
Abstract: A calibration method of an X-ray measuring device includes: mounting a calibration tool 102 on a rotating table 120; a moving position acquisition step of parallelly moving a position of an j-th sphere 106 with respect to a position of a first sphere 106, irradiating the calibration tool 102 with an X-ray 118, and acquiring, form an output of an X-ray image detector 124, a moving position Mj where the magnitude of a differential position Erjofa centroid position ImDisjh_Sphr_j of a projected image of the j(2£j£N)-th sphere 106 with respect to a centroid position ImDis1_Sphr_1 of a projected image of the first sphere 106 becomes equal to or less than a specified value Vx; a relative position calculation step of performing the moving position acquisition step on the remaining spheres; a feature position calculation step; a transformation matrix calculation step; a rotation detection step; a position calculation step; and a center position calculation step.
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公开(公告)号：US11333619B2
公开(公告)日：2022-05-17
申请号：US17011411
申请日：2020-09-03
Applicant: MITUTOYO CORPORATION
Inventor： Seiji Sasaki , Nobuyuki Nakazawa , Hisayoshi Sakai , Masato Kon , Hidemitsu Asano
IPC: G01N23/00 , G01N23/046 , G06T7/00
Abstract: A measurement X-ray CT apparatus calibrates a geometrical positional relationship between a focus of an X-ray source, an X-ray detector, and a rotation center of a rotating table in advance. The measurement X-ray CT apparatus then obtains projection images by irradiating the object to be measured with X-rays to perform a CT scan, and generates a three-dimensional image of the object to be measured by CT reconstruction of the projection images. The measurement X-ray CT apparatus further includes a reference frame that is made of a material and has a structure less susceptible to environmental changes, and sensors that are located on the reference frame and intended to successively obtain calibration values of the geometrical positional relationship between the focus of the X-ray source and the X-ray detector during the CT scan. The calibration values are used as parameters of the CT reconstruction.
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公开(公告)号：US20220146246A1
公开(公告)日：2022-05-12
申请号：US17508106
申请日：2021-10-22
Applicant: MITUTOYO CORPORATION
Inventor： Satoshi YOSHITANI , Tomoyuki MIYAZAKI
Abstract: A form measuring instrument includes: a contact tip configured to contact with a workpiece; a movement mechanism configured to cause relative movement of the contact tip with respect to the workpiece; a movement controlling unit configured to control the movement mechanism; a contact sensor configured to detect a contact amount of the contact tip with the workpiece and output a detection signal corresponding to the contact amount; and an abnormality determining unit configured to determine an abnormality of sensitivity of the contact sensor based on a change in the detection signal outputted from the contact sensor during an operation of the movement mechanism in which the contact tip is pressed against the workpiece.
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Patent Agency Ranking
公开(公告)号：US11320289B2
公开(公告)日：2022-05-03
申请号：US16823953
申请日：2020-03-19
Applicant: MITUTOYO CORPORATION
Inventor： Yoshiaki Kato
Abstract: An optical encoder includes a scale, a calculator, and a head having a light source, an image capturer, and a lens array having first and second lenses. The calculator includes a signal generator, an extractor, a signal combiner, and a displacement calculator. The signal generator generates a sine wave signal. The extractor extracts first and second regions. The signal combiner, based on an inter-regional distance, uses a sine wave signal of the second region to generate a sine wave signal that extends to a first end of the first region such that the generated sine wave signal overlaps with a sine wave signal of the first region. The signal combiner also combines the sine wave signal of the first region with the generated sine wave signal. The displacement calculator calculates an amount of relative displacement based on the sine wave signal that is combined by the signal combiner.
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公开(公告)号：US11274945B2
公开(公告)日：2022-03-15
申请号：US16885922
申请日：2020-05-28
Applicant: MITUTOYO CORPORATION
Inventor： Yo Terashita , Seiko Kunihiro , Hiroshi Kamitani , Mitsuru Fukuda
Abstract: A coordinate measuring machine including a surface plate; a probe moving body; an INC pattern and ABS pattern along a moving direction of the probe moving body; an INC detector that outputs a plurality of waveform signals in accordance with the moving amount based on the INC pattern; an ABS detector that outputs an absolute position signal of the probe moving body based on the ABS pattern in response to a request signal; and a control device that has a INC counting portion that counts the waveform signals outputted by the INC detector; a position information obtaining portion that reads a counted value at a timing when a work is detected by a probe; and a presetting portion that emits the request signal to the ABS detector to obtain the absolute position signal, and presets the counting portion to this absolute position signal.
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68.发明授权公开(公告)号：US11274916B2
公开(公告)日：2022-03-15
申请号：US16918482
申请日：2020-07-01
Applicant: MITUTOYO CORPORATION
Inventor： Masashi Ishige , Yuko Shishido
IPC: G01B9/02 , G01B11/24 , G01B11/27 , G01B9/0209 , G02B21/00
Abstract: A device including: a storage section that stores information for measuring a light path difference of two light paths relating to interference of a white light, from a color appearing due to the interference; and a calculation section that measures, from an image configured by a plurality of pixels each including information representing a color, the light path difference relating to each of the pixels, based on at least the information stored in the storage section.
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公开(公告)号：US11268797B2
公开(公告)日：2022-03-08
申请号：US16805474
申请日：2020-02-28
Applicant: Mitutoyo Corporation
Inventor： Teppei Ohno , Mao Kikuchi
Abstract: A coupling portion has one end coupleable to a distal end of a measurement spindle. The measurement spindle is disposed on a gauge inspector and movable in a measurement axis direction. A cylindrical stem is insertable into a gauge holding member to hold the inserted stem. The stem slidably holds a spindle having a distal end on which a contact point of a gauge is disposed. A frame has a first end coupled to a second end of the coupling portion and has a second end to which the gauge holding member is mountable. The gauge holding member is held to the frame such that an axis of the stem runs along the measurement axis direction. As a result, inspection is performed easily and accurately in a reverse posture with a contact point facing upward when a gauge is inspected.
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公开(公告)号：US11249225B2
公开(公告)日：2022-02-15
申请号：US16723068
申请日：2019-12-20
Applicant: Mitutoyo Corporation
Inventor： Paul Gerard Gladnick
IPC: G02B3/14 , G02B3/00 , G02B7/02 , G01B11/24 , G01B11/02 , G01B11/03 , G02F1/11 , G02B21/36 , G06T7/00 , G02F1/33 , G02F1/29 , G01N21/88
Abstract: A variable focal length lens system includes a tunable acoustic gradient (TAG) lens; a TAG lens controller; and processor(s) configured to: (a) operate the TAG lens controller to drive a periodic modulation of the TAG lens optical power at a TAG lens resonant frequency, using a first amplitude driving signal that provides a first focal Z range extending between peak focus distances Z1max+ and Z1max−; and expose a first image using a first exposure increment approximately at the timing of Z1max+ or Z1max−; (b) adjust the TAG lens controller to drive the periodic modulation using a second amplitude driving signal that provides a second focal Z range extending between peak focus distances Z2max+ and Z2max−; and expose a second image using a second exposure increment approximately at the timing of Z2max+ or Z2max−; and (c) perform processing that includes determining focus metric values for the first and second images.
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