JPS56164959A - Speed detector - Google Patents

Speed detector

Info

Publication number
JPS56164959A
JPS56164959A JP7052980A JP7052980A JPS56164959A JP S56164959 A JPS56164959 A JP S56164959A JP 7052980 A JP7052980 A JP 7052980A JP 7052980 A JP7052980 A JP 7052980A JP S56164959 A JPS56164959 A JP S56164959A
Authority
JP
Japan
Prior art keywords
polarities
comparators
speed
rotating directions
arrival
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
JP7052980A
Other languages
Japanese (ja)
Inventor
Masao Tanaka
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.)
Fuji Electric Co Ltd
Original Assignee
Fuji 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 Fuji Electric Co Ltd filed Critical Fuji Electric Co Ltd
Priority to JP7052980A priority Critical patent/JPS56164959A/en
Publication of JPS56164959A publication Critical patent/JPS56164959A/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
    • G01P1/00—Details of instruments
    • G01P1/07—Indicating devices, e.g. for remote indication
    • G01P1/08—Arrangements of scales, pointers, lamps or acoustic indicators, e.g. in automobile speedometers
    • G01P1/10—Arrangements of scales, pointers, lamps or acoustic indicators, e.g. in automobile speedometers for indicating predetermined speeds
    • G01P1/103—Arrangements of scales, pointers, lamps or acoustic indicators, e.g. in automobile speedometers for indicating predetermined speeds by comparing the value of the measured signal with one or several reference values

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Control Of Velocity Or Acceleration (AREA)
  • Control Of Electric Motors In General (AREA)

Abstract

PURPOSE:To make the detection of speed arrival possible rapidly and accurately with simple constitution by generating a speed arrival signal with two sets of comparators which operate respectively and separately according to the polarities in the differences between a command speed and actual speeds. CONSTITUTION:The differential signals having different polarities according to the rotating directions of the command speed signal ES and actually measured speed signal EM of which polarities are reversed according to rotating directions and have mutually reversed polarities are outputted from an operational amplifier 1, and are compared in comparators 10, 20 which operate separately according to the polarities of the differential signals and to which positive and negative reference voltages are being applied. Then, a transistor 30 is conducted by the high level speed arrival detection signals via the comparators 10, 21 irrespective of rotating directions and a relay 31 is energized. By this simple constitution, the speed arrival is detected rapidly without any time loss by way of two sets of the comparators which operate separately.
JP7052980A 1980-05-26 1980-05-26 Speed detector Pending JPS56164959A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7052980A JPS56164959A (en) 1980-05-26 1980-05-26 Speed detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7052980A JPS56164959A (en) 1980-05-26 1980-05-26 Speed detector

Publications (1)

Publication Number Publication Date
JPS56164959A true JPS56164959A (en) 1981-12-18

Family

ID=13434143

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7052980A Pending JPS56164959A (en) 1980-05-26 1980-05-26 Speed detector

Country Status (1)

Country Link
JP (1) JPS56164959A (en)

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