公开(公告)号：US12188768B2

公开(公告)日：2025-01-07

申请号：US17895267

申请日：2022-08-25

Applicant: MITUTOYO CORPORATION

Inventor： Shunsuke Tanaka ,  Yoshiaki Kato ,  Miyako Mizutani

IPC: G01B7/30 ,  G01B11/26 ,  G01D5/20

Abstract: An angle detector includes a rotary scale having a scale pattern in which a plurality of patterns are arrayed along a circumference direction of the rotary scale, and a plurality of detection heads, each of which detects the plurality of patterns from the scale pattern. The plurality of detection heads are shifted from each other in the circumference direction of the rotary scale and are shifted from each other in a radial direction of the rotary scale.

公开(公告)号：US20240337474A1

公开(公告)日：2024-10-10

申请号：US18624666

申请日：2024-04-02

Applicant: MITUTOYO CORPORATION

Inventor： Shunsuke Tanaka ,  Hirokazu Kobayashi

IPC: G01B5/24 ,  G01B3/00 ,  G01B11/26

CPC classification number: G01B5/24 ,  G01B3/004 ,  G01B11/26

Abstract: A measuring device includes a first scale provided on a rotary scale, arranged around an rotation axis of the rotary scale, and having first patterns arranged along a circumferential direction, a second scale provided on the rotary scale, arranged around the rotation axis, and having a plurality of second patterns arranged along the circumferential direction, first pattern detection sections arranged around the rotation axis, a second detection section that faces the second scale and reads at least a part of the plurality of second patterns, and a calculator configured to identify an absolute angle of the rotary scale, on a basis of a reading result of the first pattern detection sections and a reading result of the second pattern detection section. A number of the second pattern detection section is less than a number of the plurality of first pattern detection sections.

公开(公告)号：US20230082750A1

公开(公告)日：2023-03-16

申请号：US17895267

申请日：2022-08-25

Applicant: MITUTOYO CORPORATION

Inventor： Shunsuke Tanaka ,  Yoshiaki Kato ,  Miyako Mizutani

IPC: G01B7/30 ,  G01B11/26 ,  G01D5/20

Abstract: An angle detector includes a rotary scale having a scale pattern in which a plurality of patterns are arrayed along a circumference direction of the rotary scale, and a plurality of detection heads, each of which detects the plurality of patterns from the scale pattern. The plurality of detection heads are shifted from each other in the circumference direction of the rotary scale and are shifted from each other in a radial direction of the rotary scale.

公开(公告)号：US20240302150A1

公开(公告)日：2024-09-12

申请号：US18592909

申请日：2024-03-01

Applicant: MITUTOYO CORPORATION

Inventor： Shunsuke Tanaka ,  Hirokazu Kobayashi

IPC: G01B3/00 ,  G01B5/24 ,  G01B7/30

CPC classification number: G01B3/004 ,  G01B5/24 ,  G01B7/30 ,  G01B2210/58

Abstract: A measuring device includes a rotary encoder having a rotary scale and a plurality of detection portions, and a control device. The rotary scale are arranged around a rotation axis and has a scale pattern in which a plurality of patterns are arranged along a circumferential direction. The plurality of detection portions are arranged around the rotation axis, and reads the plurality of patterns from the scale pattern. The control device causes one or some detection portions to perform a first reading of the plurality of patterns at a first timing, causes another or other detection portions different from the one or some detection portions to perform a second reading of the plurality of patterns at a second timing different from the first timing, and calculates a measurement result based on a first reading result of the first reading and a second reading result of the second reading.

公开(公告)号：US20240230378A1

公开(公告)日：2024-07-11

申请号：US18617719

申请日：2024-03-27

Applicant: MITUTOYO CORPORATION

Inventor： Yoshiaki Kato ,  Kimitoshi Ono ,  Shunsuke Tanaka

IPC: G01D5/20 ,  G01B7/14

CPC classification number: G01D5/2086 ,  G01B7/14

Abstract: A multi-degree-of-freedom displacement measuring device includes a rotary scale that has a scale pattern including a plurality of patterns that are arranged around a first rotation axis and arrayed along a circumference direction of the rotary scale, a detection head group including a plurality of detection heads, each of which is provided around the first rotation axis, is arranged on an installation face facing the rotary scale, and is configured to detect each of the plurality of patterns from the scale pattern, and a calculator configured to, based on detection values acquired by the plurality of detection heads, calculate a relative rotation angle around the first rotation axis, and calculate at least one of a relative movement amount in a direction along the first rotation axis and a relative movement amount in a direction along a second rotation axis orthogonal to the first rotation axis.