JPS56122960A - Rotation frequency detecting device - Google Patents

Rotation frequency detecting device

Info

Publication number
JPS56122960A
JPS56122960A JP2697980A JP2697980A JPS56122960A JP S56122960 A JPS56122960 A JP S56122960A JP 2697980 A JP2697980 A JP 2697980A JP 2697980 A JP2697980 A JP 2697980A JP S56122960 A JPS56122960 A JP S56122960A
Authority
JP
Japan
Prior art keywords
signal
light emitting
turned
emitting elements
light
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
JP2697980A
Other languages
Japanese (ja)
Inventor
Kazuhiro Watanabe
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.)
Kawaguchiko Seimitsu KK
Original Assignee
Kawaguchiko Seimitsu KK
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 Kawaguchiko Seimitsu KK filed Critical Kawaguchiko Seimitsu KK
Priority to JP2697980A priority Critical patent/JPS56122960A/en
Publication of JPS56122960A publication Critical patent/JPS56122960A/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 reduce power consumption and prevent the malfunction caused by inversion due to physical disturbance and pulsation, by extinguishing the other of two light emitting elements when the signal of one of said two elements is detected, in the light encoder type rotation frequency detector. CONSTITUTION:Light emitting elements 4 and 6 and light receiving elements 5 and 7 form a light encoder with the disc having one hole interposed and are shifted by 180 deg. to each other. Power sources H and I for light emitting elements are supplied from battery 11 through constant power supply circuit 16. Rotation signals A and C which are not turned on simultaneously are stored in RS-FF15 through shaping circuits 12 and 14. Signal E becomes 1 when signal A is turned on, and signal F becomes 1 when signal C is turned on, and power sources H and I are controlled by control circuits 17 and 18 so that light emitting element 6 is extinguished when signal A is turned on and light emitting element 4 is extinguished when signal C is turned on. Signal E is counted by counting circuit 13 to indicate the rotation frequency. Light emitting elements are lit only in case of necessity to reduce power consumption, and further, the malfunction is prevented even if a minute inversion of the disc is caused by physical disturbance and pulsation.
JP2697980A 1980-03-04 1980-03-04 Rotation frequency detecting device Pending JPS56122960A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2697980A JPS56122960A (en) 1980-03-04 1980-03-04 Rotation frequency detecting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2697980A JPS56122960A (en) 1980-03-04 1980-03-04 Rotation frequency detecting device

Publications (1)

Publication Number Publication Date
JPS56122960A true JPS56122960A (en) 1981-09-26

Family

ID=12208269

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2697980A Pending JPS56122960A (en) 1980-03-04 1980-03-04 Rotation frequency detecting device

Country Status (1)

Country Link
JP (1) JPS56122960A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58160812A (en) * 1982-03-17 1983-09-24 Mitsubishi Electric Corp Metering device
JP2002189035A (en) * 2000-12-22 2002-07-05 Chubu Keiki Kogyo Kk Detection method for rotation of disk for watt-hour meter, and induction-type watt-hour meter
CN109152175A (en) * 2014-11-27 2019-01-04 株式会社小糸制作所 Lamp circuit and lamp system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52145271A (en) * 1976-05-29 1977-12-03 Katsuhiko Nakamura Photoelectric rpm meter
JPS5482256A (en) * 1977-12-14 1979-06-30 Matsushita Electric Ind Co Ltd Counter circuit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52145271A (en) * 1976-05-29 1977-12-03 Katsuhiko Nakamura Photoelectric rpm meter
JPS5482256A (en) * 1977-12-14 1979-06-30 Matsushita Electric Ind Co Ltd Counter circuit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58160812A (en) * 1982-03-17 1983-09-24 Mitsubishi Electric Corp Metering device
JPH0124244B2 (en) * 1982-03-17 1989-05-10 Mitsubishi Electric Corp
JP2002189035A (en) * 2000-12-22 2002-07-05 Chubu Keiki Kogyo Kk Detection method for rotation of disk for watt-hour meter, and induction-type watt-hour meter
CN109152175A (en) * 2014-11-27 2019-01-04 株式会社小糸制作所 Lamp circuit and lamp system

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