JPS5723861A - Electronic speed meter for vehicle - Google Patents

Electronic speed meter for vehicle

Info

Publication number
JPS5723861A
JPS5723861A JP9876780A JP9876780A JPS5723861A JP S5723861 A JPS5723861 A JP S5723861A JP 9876780 A JP9876780 A JP 9876780A JP 9876780 A JP9876780 A JP 9876780A JP S5723861 A JPS5723861 A JP S5723861A
Authority
JP
Japan
Prior art keywords
car speed
resistance
condenser
display
time constant
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
JP9876780A
Other languages
Japanese (ja)
Inventor
Shigeru Okabayashi
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.)
Nissan Motor Co Ltd
Original Assignee
Nissan Motor 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 Nissan Motor Co Ltd filed Critical Nissan Motor Co Ltd
Priority to JP9876780A priority Critical patent/JPS5723861A/en
Publication of JPS5723861A publication Critical patent/JPS5723861A/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
    • G01P3/4802—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage by using electronic circuits in general
    • G01P3/4805—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage by using electronic circuits in general by using circuits for the electrical integration of the generated pulses

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Indication And Recording Devices For Special Purposes And Tariff Metering Devices (AREA)

Abstract

PURPOSE:To improve response of a display and to prevent flicker by utilizing a time constant controlling circuit comprising a nonlinear resistance element, in which the value of the resistance decreases with an increasing car speed and a capacitive element in an electronic speed meter for a vehicle. CONSTITUTION:A car speed pulse from a car speed sensor 9 is shaped to constant width in a monostable multivibrator 8 and with a condenser 6 and a resistance 7, a discharge voltage proportional to a car speed is obtained. When, with a rapidly increased car speed, an output of a buffer amplifier 18 is increased guickly, all of zener diodes 10-12 conduct, a time constant for charging of a condenser 17 becomes relatively small because a parallel synthesized resistance of resistances 13-16 is small and thus response of a display is improved. For a fine variation of a car speed when running with a constant speed, all of the zener diodes do not conduct, a charging time constant of the condenser 17 is determined by the resistance 16, and because it becomes relatively large, flickering of the display is prevented.
JP9876780A 1980-07-21 1980-07-21 Electronic speed meter for vehicle Pending JPS5723861A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9876780A JPS5723861A (en) 1980-07-21 1980-07-21 Electronic speed meter for vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9876780A JPS5723861A (en) 1980-07-21 1980-07-21 Electronic speed meter for vehicle

Publications (1)

Publication Number Publication Date
JPS5723861A true JPS5723861A (en) 1982-02-08

Family

ID=14228537

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9876780A Pending JPS5723861A (en) 1980-07-21 1980-07-21 Electronic speed meter for vehicle

Country Status (1)

Country Link
JP (1) JPS5723861A (en)

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