JPS5757263A - Speed compunting circuit - Google Patents

Speed compunting circuit

Info

Publication number
JPS5757263A
JPS5757263A JP13168880A JP13168880A JPS5757263A JP S5757263 A JPS5757263 A JP S5757263A JP 13168880 A JP13168880 A JP 13168880A JP 13168880 A JP13168880 A JP 13168880A JP S5757263 A JPS5757263 A JP S5757263A
Authority
JP
Japan
Prior art keywords
speed
period
frequency dividing
computed
signal
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
JP13168880A
Other languages
Japanese (ja)
Inventor
Tsukasa Yamauchi
Isao Nakajima
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP13168880A priority Critical patent/JPS5757263A/en
Publication of JPS5757263A publication Critical patent/JPS5757263A/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
    • G01P3/489—Digital circuits therefor

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Linear Or Angular Velocity Measurement And Their Indicating Devices (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Conveying Record Carriers (AREA)

Abstract

PURPOSE:To maintain constant accuracy over a broad speed region by dividing an an encoder signal at an arbitrary frequency division ratio, and measuring the period of said divided signal. CONSTITUTION:The speed of rotary machine 17 is sensed by a speed pulse sensor 15. The speed is computed, and the feedback of the rotary machine is controlled by the difference between the computed result and a preset value. In this system, speed pulses are divided by a frequency dividing part 9, the period is measured by a period measuring part 7, and the speed is computed in a speed computing part 8. The frequency dividing ratio can be arbitrarily set by a frequency dividing part 10. Therefore, even though the speed is varied over the broad region and the signal period is varied accordingly, the frequency dividing ratio can be set appropriately so that the constant accuracy can be maintained.
JP13168880A 1980-09-24 1980-09-24 Speed compunting circuit Pending JPS5757263A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13168880A JPS5757263A (en) 1980-09-24 1980-09-24 Speed compunting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13168880A JPS5757263A (en) 1980-09-24 1980-09-24 Speed compunting circuit

Publications (1)

Publication Number Publication Date
JPS5757263A true JPS5757263A (en) 1982-04-06

Family

ID=15063884

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13168880A Pending JPS5757263A (en) 1980-09-24 1980-09-24 Speed compunting circuit

Country Status (1)

Country Link
JP (1) JPS5757263A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60134515A (en) * 1983-12-22 1985-07-17 Toshiba Mach Co Ltd Pulse generating circuit
JPS61189461A (en) * 1985-02-19 1986-08-23 Tokico Ltd Calculating method for vehicle speed

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60134515A (en) * 1983-12-22 1985-07-17 Toshiba Mach Co Ltd Pulse generating circuit
JPS61189461A (en) * 1985-02-19 1986-08-23 Tokico Ltd Calculating method for vehicle speed

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