JPS56114764A - Speed detector - Google Patents

Speed detector

Info

Publication number
JPS56114764A
JPS56114764A JP1762480A JP1762480A JPS56114764A JP S56114764 A JPS56114764 A JP S56114764A JP 1762480 A JP1762480 A JP 1762480A JP 1762480 A JP1762480 A JP 1762480A JP S56114764 A JPS56114764 A JP S56114764A
Authority
JP
Japan
Prior art keywords
signal
incremental position
speed
motor
counter
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
JP1762480A
Other languages
Japanese (ja)
Inventor
Hiroshi Inada
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 JP1762480A priority Critical patent/JPS56114764A/en
Publication of JPS56114764A publication Critical patent/JPS56114764A/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

Abstract

PURPOSE:To detect an accurate speed signal with less ripples even when the number of incremental position signals is small, by generating a signal in inverse proportion to a motor speed on the basis of an incremental position detection signal. CONSTITUTION:With an incremental position signal from incremental position detector 2 on every completion of the constant-angle rotation of motor 1, the count value of clocks from clock generator 12 of counter 3 is set in registor 6 and counter 3 is cleared via delay circuit 4. Consequently, the valve that varies in inverse proportion to the speed of motor 1 while in proportion to the period of the incremental position signal is set in register 6. According to this set value, down counter 7 generates a backward digit shift signal of a period of inverse proportion to the speed of the motor to trigger monostable multivibrator 9. Therefore, speed pulses of a frequency much higher than the cutoff frequency of LPF10 from multivibrator 9 are smoothed and even when the number of incremental position signals is small, an accurate speed signal with a few ripples can be detected.
JP1762480A 1980-02-15 1980-02-15 Speed detector Pending JPS56114764A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1762480A JPS56114764A (en) 1980-02-15 1980-02-15 Speed detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1762480A JPS56114764A (en) 1980-02-15 1980-02-15 Speed detector

Publications (1)

Publication Number Publication Date
JPS56114764A true JPS56114764A (en) 1981-09-09

Family

ID=11949015

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1762480A Pending JPS56114764A (en) 1980-02-15 1980-02-15 Speed detector

Country Status (1)

Country Link
JP (1) JPS56114764A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5272555A (en) * 1975-12-15 1977-06-17 Toyo Electric Mfg Co Ltd Frequencyytoodigital converter

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5272555A (en) * 1975-12-15 1977-06-17 Toyo Electric Mfg Co Ltd Frequencyytoodigital converter

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