JPS5734457A - Rotation measuring apparatus - Google Patents

Rotation measuring apparatus

Info

Publication number
JPS5734457A
JPS5734457A JP10971380A JP10971380A JPS5734457A JP S5734457 A JPS5734457 A JP S5734457A JP 10971380 A JP10971380 A JP 10971380A JP 10971380 A JP10971380 A JP 10971380A JP S5734457 A JPS5734457 A JP S5734457A
Authority
JP
Japan
Prior art keywords
sections
light
width
reflecting
equal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP10971380A
Other languages
Japanese (ja)
Inventor
Shuji Nakazawa
Hiroshi Sugiki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP10971380A priority Critical patent/JPS5734457A/en
Publication of JPS5734457A publication Critical patent/JPS5734457A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
    • G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
    • G01P3/486—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals delivered by photo-electric detectors

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Linear Or Angular Velocity Measurement And Their Indicating Devices (AREA)
  • Optical Transform (AREA)

Abstract

PURPOSE:To achieve a highly accurate measurement of the rotational frequency and the angle of rotation along with a broader striped section by converting changes in the quantity of light into an analog signal of sine wave with the diameter of an irradiation light equal to the width of stripes at reflecting and absorbing sections in a reflected light type rotation detector. CONSTITUTION:Reflecting light sensing device 4 with a light emitting element 5 and a photodetecting element 6 is arranged to face a rotor 1 alternately having absorbing sections 2 and reflecting sections 3 both equal in the width. As the width L of stripes at the absorbing sections 2 and reflecting sections 3 is almost equal to the width of light, the output of the photodetecting element 6 varies as a sine wave ?in an analogous manner and cyclically from the maximum to the minimum value. The rotational frequency is measured by counting the maximum and the angle of the rotation of the striped sections is measured based on analog information from the minimum to the maximum value.
JP10971380A 1980-08-08 1980-08-08 Rotation measuring apparatus Pending JPS5734457A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10971380A JPS5734457A (en) 1980-08-08 1980-08-08 Rotation measuring apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10971380A JPS5734457A (en) 1980-08-08 1980-08-08 Rotation measuring apparatus

Publications (1)

Publication Number Publication Date
JPS5734457A true JPS5734457A (en) 1982-02-24

Family

ID=14517328

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10971380A Pending JPS5734457A (en) 1980-08-08 1980-08-08 Rotation measuring apparatus

Country Status (1)

Country Link
JP (1) JPS5734457A (en)

Cited By (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6321856U (en) * 1986-07-25 1988-02-13
JPH0257913A (en) * 1988-08-24 1990-02-27 Ricoh Co Ltd Measuring method of amount of rotation
JPH0297618U (en) * 1989-01-20 1990-08-03
JPH02101273U (en) * 1989-01-31 1990-08-13
US5678933A (en) * 1995-01-20 1997-10-21 Nsk Ltd. Speed sensing rolling bearing unit
JP2001124537A (en) * 1999-09-28 2001-05-11 Snap On Deutschland Holding Gmbh Rotational angle sensor for rotating member
JP2005164588A (en) * 2003-12-01 2005-06-23 Agilent Technol Inc Encoder using reflective cylindrical surface
JP2013083600A (en) * 2011-10-12 2013-05-09 Mitsubishi Motors Corp Tilt angle detection device and automatic tilt angle calculation device
US9709956B1 (en) 2013-08-09 2017-07-18 Apple Inc. Tactile switch for an electronic device
US9753436B2 (en) 2013-06-11 2017-09-05 Apple Inc. Rotary input mechanism for an electronic device
US9891651B2 (en) 2016-02-27 2018-02-13 Apple Inc. Rotatable input mechanism having adjustable output
US9952558B2 (en) 2015-03-08 2018-04-24 Apple Inc. Compressible seal for rotatable and translatable input mechanisms
US10018966B2 (en) 2015-04-24 2018-07-10 Apple Inc. Cover member for an input mechanism of an electronic device
US10019097B2 (en) 2016-07-25 2018-07-10 Apple Inc. Force-detecting input structure
US10048802B2 (en) 2014-02-12 2018-08-14 Apple Inc. Rejection of false turns of rotary inputs for electronic devices
US10061399B2 (en) 2016-07-15 2018-08-28 Apple Inc. Capacitive gap sensor ring for an input device
US10145711B2 (en) 2015-03-05 2018-12-04 Apple Inc. Optical encoder with direction-dependent optical properties having an optically anisotropic region to produce a first and a second light distribution
US10190891B1 (en) 2014-07-16 2019-01-29 Apple Inc. Optical encoder for detecting rotational and axial movement
US10551798B1 (en) 2016-05-17 2020-02-04 Apple Inc. Rotatable crown for an electronic device
US10599101B2 (en) 2014-09-02 2020-03-24 Apple Inc. Wearable electronic device
US10664074B2 (en) 2017-06-19 2020-05-26 Apple Inc. Contact-sensitive crown for an electronic watch
US10962935B1 (en) 2017-07-18 2021-03-30 Apple Inc. Tri-axis force sensor
US11181863B2 (en) 2018-08-24 2021-11-23 Apple Inc. Conductive cap for watch crown
US11194299B1 (en) 2019-02-12 2021-12-07 Apple Inc. Variable frictional feedback device for a digital crown of an electronic watch
US11194298B2 (en) 2018-08-30 2021-12-07 Apple Inc. Crown assembly for an electronic watch
US11269376B2 (en) 2020-06-11 2022-03-08 Apple Inc. Electronic device
US11360440B2 (en) 2018-06-25 2022-06-14 Apple Inc. Crown for an electronic watch
US11550268B2 (en) 2020-06-02 2023-01-10 Apple Inc. Switch module for electronic crown assembly
US11561515B2 (en) 2018-08-02 2023-01-24 Apple Inc. Crown for an electronic watch
US11796961B2 (en) 2018-08-24 2023-10-24 Apple Inc. Conductive cap for watch crown
US11796968B2 (en) 2018-08-30 2023-10-24 Apple Inc. Crown assembly for an electronic watch

Cited By (78)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6321856U (en) * 1986-07-25 1988-02-13
JPH0257913A (en) * 1988-08-24 1990-02-27 Ricoh Co Ltd Measuring method of amount of rotation
JPH0297618U (en) * 1989-01-20 1990-08-03
JPH02101273U (en) * 1989-01-31 1990-08-13
US5678933A (en) * 1995-01-20 1997-10-21 Nsk Ltd. Speed sensing rolling bearing unit
JP2001124537A (en) * 1999-09-28 2001-05-11 Snap On Deutschland Holding Gmbh Rotational angle sensor for rotating member
JP2005164588A (en) * 2003-12-01 2005-06-23 Agilent Technol Inc Encoder using reflective cylindrical surface
JP4705363B2 (en) * 2003-12-01 2011-06-22 アバゴ・テクノロジーズ・イーシービーユー・アイピー（シンガポール）プライベート・リミテッド Encoder using a reflective cylindrical surface
JP2013083600A (en) * 2011-10-12 2013-05-09 Mitsubishi Motors Corp Tilt angle detection device and automatic tilt angle calculation device
US10234828B2 (en) 2013-06-11 2019-03-19 Apple Inc. Rotary input mechanism for an electronic device
US9753436B2 (en) 2013-06-11 2017-09-05 Apple Inc. Rotary input mechanism for an electronic device
US11531306B2 (en) 2013-06-11 2022-12-20 Apple Inc. Rotary input mechanism for an electronic device
US9886006B2 (en) 2013-06-11 2018-02-06 Apple Inc. Rotary input mechanism for an electronic device
US10962930B2 (en) 2013-08-09 2021-03-30 Apple Inc. Tactile switch for an electronic device
US10175652B2 (en) 2013-08-09 2019-01-08 Apple Inc. Tactile switch for an electronic device
US9971305B2 (en) 2013-08-09 2018-05-15 Apple Inc. Tactile switch for an electronic device
US11886149B2 (en) 2013-08-09 2024-01-30 Apple Inc. Tactile switch for an electronic device
US10331082B2 (en) 2013-08-09 2019-06-25 Apple Inc. Tactile switch for an electronic device
US9836025B2 (en) 2013-08-09 2017-12-05 Apple Inc. Tactile switch for an electronic device
US10331081B2 (en) 2013-08-09 2019-06-25 Apple Inc. Tactile switch for an electronic device
US10732571B2 (en) 2013-08-09 2020-08-04 Apple Inc. Tactile switch for an electronic device
US9709956B1 (en) 2013-08-09 2017-07-18 Apple Inc. Tactile switch for an electronic device
US10216147B2 (en) 2013-08-09 2019-02-26 Apple Inc. Tactile switch for an electronic device
US11669205B2 (en) 2014-02-12 2023-06-06 Apple Inc. Rejection of false turns of rotary inputs for electronic devices
US10222909B2 (en) 2014-02-12 2019-03-05 Apple Inc. Rejection of false turns of rotary inputs for electronic devices
US10884549B2 (en) 2014-02-12 2021-01-05 Apple Inc. Rejection of false turns of rotary inputs for electronic devices
US10613685B2 (en) 2014-02-12 2020-04-07 Apple Inc. Rejection of false turns of rotary inputs for electronic devices
US10048802B2 (en) 2014-02-12 2018-08-14 Apple Inc. Rejection of false turns of rotary inputs for electronic devices
US11347351B2 (en) 2014-02-12 2022-05-31 Apple Inc. Rejection of false turns of rotary inputs for electronic devices
US10190891B1 (en) 2014-07-16 2019-01-29 Apple Inc. Optical encoder for detecting rotational and axial movement
US11015960B2 (en) 2014-07-16 2021-05-25 Apple Inc. Optical encoder for detecting crown movement
US11221590B2 (en) 2014-09-02 2022-01-11 Apple Inc. Wearable electronic device
US10942491B2 (en) 2014-09-02 2021-03-09 Apple Inc. Wearable electronic device
US11474483B2 (en) 2014-09-02 2022-10-18 Apple Inc. Wearable electronic device
US11762342B2 (en) 2014-09-02 2023-09-19 Apple Inc. Wearable electronic device
US10599101B2 (en) 2014-09-02 2020-03-24 Apple Inc. Wearable electronic device
US10613485B2 (en) 2014-09-02 2020-04-07 Apple Inc. Wearable electronic device
US10620591B2 (en) 2014-09-02 2020-04-14 Apple Inc. Wearable electronic device
US10627783B2 (en) 2014-09-02 2020-04-21 Apple Inc. Wearable electronic device
US11002572B2 (en) 2015-03-05 2021-05-11 Apple Inc. Optical encoder with direction-dependent optical properties comprising a spindle having an array of surface features defining a concave contour along a first direction and a convex contour along a second direction
US10145711B2 (en) 2015-03-05 2018-12-04 Apple Inc. Optical encoder with direction-dependent optical properties having an optically anisotropic region to produce a first and a second light distribution
US10655988B2 (en) 2015-03-05 2020-05-19 Apple Inc. Watch with rotatable optical encoder having a spindle defining an array of alternating regions extending along an axial direction parallel to the axis of a shaft
US10037006B2 (en) 2015-03-08 2018-07-31 Apple Inc. Compressible seal for rotatable and translatable input mechanisms
US10845764B2 (en) 2015-03-08 2020-11-24 Apple Inc. Compressible seal for rotatable and translatable input mechanisms
US9952558B2 (en) 2015-03-08 2018-04-24 Apple Inc. Compressible seal for rotatable and translatable input mechanisms
US10222756B2 (en) 2015-04-24 2019-03-05 Apple Inc. Cover member for an input mechanism of an electronic device
US10018966B2 (en) 2015-04-24 2018-07-10 Apple Inc. Cover member for an input mechanism of an electronic device
US10579090B2 (en) 2016-02-27 2020-03-03 Apple Inc. Rotatable input mechanism having adjustable output
US9891651B2 (en) 2016-02-27 2018-02-13 Apple Inc. Rotatable input mechanism having adjustable output
US10551798B1 (en) 2016-05-17 2020-02-04 Apple Inc. Rotatable crown for an electronic device
US10955937B2 (en) 2016-07-15 2021-03-23 Apple Inc. Capacitive gap sensor ring for an input device
US10509486B2 (en) 2016-07-15 2019-12-17 Apple Inc. Capacitive gap sensor ring for an electronic watch
US10061399B2 (en) 2016-07-15 2018-08-28 Apple Inc. Capacitive gap sensor ring for an input device
US10379629B2 (en) 2016-07-15 2019-08-13 Apple Inc. Capacitive gap sensor ring for an electronic watch
US11513613B2 (en) 2016-07-15 2022-11-29 Apple Inc. Capacitive gap sensor ring for an input device
US11720064B2 (en) 2016-07-25 2023-08-08 Apple Inc. Force-detecting input structure
US10019097B2 (en) 2016-07-25 2018-07-10 Apple Inc. Force-detecting input structure
US11385599B2 (en) 2016-07-25 2022-07-12 Apple Inc. Force-detecting input structure
US10296125B2 (en) 2016-07-25 2019-05-21 Apple Inc. Force-detecting input structure
US10572053B2 (en) 2016-07-25 2020-02-25 Apple Inc. Force-detecting input structure
US10948880B2 (en) 2016-07-25 2021-03-16 Apple Inc. Force-detecting input structure
US10664074B2 (en) 2017-06-19 2020-05-26 Apple Inc. Contact-sensitive crown for an electronic watch
US10962935B1 (en) 2017-07-18 2021-03-30 Apple Inc. Tri-axis force sensor
US11754981B2 (en) 2018-06-25 2023-09-12 Apple Inc. Crown for an electronic watch
US11360440B2 (en) 2018-06-25 2022-06-14 Apple Inc. Crown for an electronic watch
US11561515B2 (en) 2018-08-02 2023-01-24 Apple Inc. Crown for an electronic watch
US11906937B2 (en) 2018-08-02 2024-02-20 Apple Inc. Crown for an electronic watch
US11796961B2 (en) 2018-08-24 2023-10-24 Apple Inc. Conductive cap for watch crown
US11181863B2 (en) 2018-08-24 2021-11-23 Apple Inc. Conductive cap for watch crown
US11194298B2 (en) 2018-08-30 2021-12-07 Apple Inc. Crown assembly for an electronic watch
US11796968B2 (en) 2018-08-30 2023-10-24 Apple Inc. Crown assembly for an electronic watch
US11194299B1 (en) 2019-02-12 2021-12-07 Apple Inc. Variable frictional feedback device for a digital crown of an electronic watch
US11860587B2 (en) 2019-02-12 2024-01-02 Apple Inc. Variable frictional feedback device for a digital crown of an electronic watch
US11550268B2 (en) 2020-06-02 2023-01-10 Apple Inc. Switch module for electronic crown assembly
US11815860B2 (en) 2020-06-02 2023-11-14 Apple Inc. Switch module for electronic crown assembly
US11635786B2 (en) 2020-06-11 2023-04-25 Apple Inc. Electronic optical sensing device
US11269376B2 (en) 2020-06-11 2022-03-08 Apple Inc. Electronic device
US11983035B2 (en) 2020-06-11 2024-05-14 Apple Inc. Electronic device

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