JPS55122449A - Motor speed detector - Google Patents

Motor speed detector

Info

Publication number
JPS55122449A
JPS55122449A JP2898179A JP2898179A JPS55122449A JP S55122449 A JPS55122449 A JP S55122449A JP 2898179 A JP2898179 A JP 2898179A JP 2898179 A JP2898179 A JP 2898179A JP S55122449 A JPS55122449 A JP S55122449A
Authority
JP
Japan
Prior art keywords
light
speed detector
fibers
slit
face
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
JP2898179A
Other languages
Japanese (ja)
Inventor
Jun Funami
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP2898179A priority Critical patent/JPS55122449A/en
Publication of JPS55122449A publication Critical patent/JPS55122449A/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)
  • Dc Machiner (AREA)

Abstract

PURPOSE:To obtain a speed detector which has a very small thickness, no problem in reflection efficiency and no limitation to a slit, by radially placing numerous light transmission fibers and providing a light emitter and a light receiver in face of both the ends of the fibers. CONSTITUTION:Numerous optical fibers 1a are radially fixed at an equiangular spacing on the bottom of a rotary disc 1. Both the ends of each optical fiber 1a are bent toward a center shaft 2 so that the inner end is used as a light inlet part i and the outer end is used as a light outlet part o. A light emitter 3 and a light receiver 4 are secured in face of the light inlet part i and the light outlet part o, respectively. When the rotary disc 1 is rotated, a revolution speed signal can be obtained from the light receiver 4. This results in providing a speed detector which has a very small thickness and is not limited as to reflection efficiency and a slit.
JP2898179A 1979-03-13 1979-03-13 Motor speed detector Pending JPS55122449A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2898179A JPS55122449A (en) 1979-03-13 1979-03-13 Motor speed detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2898179A JPS55122449A (en) 1979-03-13 1979-03-13 Motor speed detector

Publications (1)

Publication Number Publication Date
JPS55122449A true JPS55122449A (en) 1980-09-20

Family

ID=12263583

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2898179A Pending JPS55122449A (en) 1979-03-13 1979-03-13 Motor speed detector

Country Status (1)

Country Link
JP (1) JPS55122449A (en)

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