JPS5745462A - Tachometer - Google Patents

Tachometer

Info

Publication number
JPS5745462A
JPS5745462A JP12193680A JP12193680A JPS5745462A JP S5745462 A JPS5745462 A JP S5745462A JP 12193680 A JP12193680 A JP 12193680A JP 12193680 A JP12193680 A JP 12193680A JP S5745462 A JPS5745462 A JP S5745462A
Authority
JP
Japan
Prior art keywords
time
gate pulse
pulse
width
gate
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
JP12193680A
Other languages
Japanese (ja)
Inventor
Toshihiro Mori
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.)
Jeco Corp
Original Assignee
Jeco Corp
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 Jeco Corp filed Critical Jeco Corp
Priority to JP12193680A priority Critical patent/JPS5745462A/en
Publication of JPS5745462A publication Critical patent/JPS5745462A/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)
  • Indication And Recording Devices For Special Purposes And Tariff Metering Devices (AREA)
  • Measuring Frequencies, Analyzing Spectra (AREA)

Abstract

PURPOSE:To quicken the response, by heightening accuracy by lengthening the gate pulse width in idling time and shortening the gate pulse width in traveling time in an engine tachometer. CONSTITUTION:The pulse of frequency proportional to the number of revolutions of engine is outputted by a rotating number detector 1 and this pulse is passed through a gate circuit 3 by a time width of gate pulse outputted from a gate pulse generating circuit 2 and is multiplied by a frequency multiplyier 4. Then, said pulse is counted by a counter 5 and is digitally displayed by a display device 7. At this time, when the number of revolutions is a prescribed value or more (traveling time), the width of the gate pulse is shortened by driving a gate pulse alteration circuit 9 by the output of a detecting circuit 8 and also the frequency multiplying ratio is increased in accordance with this shortening ratio. Thus, a highly accurate display is made in idling time because the gate pulse width is long as it is and on the contrary, a response time of display is shortened in traveling time.
JP12193680A 1980-09-03 1980-09-03 Tachometer Pending JPS5745462A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12193680A JPS5745462A (en) 1980-09-03 1980-09-03 Tachometer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12193680A JPS5745462A (en) 1980-09-03 1980-09-03 Tachometer

Publications (1)

Publication Number Publication Date
JPS5745462A true JPS5745462A (en) 1982-03-15

Family

ID=14823591

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12193680A Pending JPS5745462A (en) 1980-09-03 1980-09-03 Tachometer

Country Status (1)

Country Link
JP (1) JPS5745462A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5978740U (en) * 1982-11-18 1984-05-28 オムロン株式会社 electronic counter
JPS6146392A (en) * 1984-08-10 1986-03-06 Kyocera Corp Material for brazing
JPS6178590A (en) * 1984-09-25 1986-04-22 Kyocera Corp Silver solder material

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5978740U (en) * 1982-11-18 1984-05-28 オムロン株式会社 electronic counter
JPS6146392A (en) * 1984-08-10 1986-03-06 Kyocera Corp Material for brazing
JPH0436797B2 (en) * 1984-08-10 1992-06-17 Kyocera Corp
JPS6178590A (en) * 1984-09-25 1986-04-22 Kyocera Corp Silver solder material
JPH0436798B2 (en) * 1984-09-25 1992-06-17 Kyosera Kk

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