JPS5684556A - Electronic speed meter with circuit for compensating speed of vehicle - Google Patents

Electronic speed meter with circuit for compensating speed of vehicle

Info

Publication number
JPS5684556A
JPS5684556A JP16034879A JP16034879A JPS5684556A JP S5684556 A JPS5684556 A JP S5684556A JP 16034879 A JP16034879 A JP 16034879A JP 16034879 A JP16034879 A JP 16034879A JP S5684556 A JPS5684556 A JP S5684556A
Authority
JP
Japan
Prior art keywords
speed
vehicle
counted
pulse signal
sampling time
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
JP16034879A
Other languages
Japanese (ja)
Inventor
Mikio Takeuchi
Hiroyuki Nomura
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 JP16034879A priority Critical patent/JPS5684556A/en
Publication of JPS5684556A publication Critical patent/JPS5684556A/en
Pending legal-status Critical Current

Links

Landscapes

  • Measuring Frequencies, Analyzing Spectra (AREA)

Abstract

PURPOSE: To enable constant indication of the real speed of a vehicle by compensating the increase of the speed of the vehicle due to the change of a dynamic radius of a tyre at the time of high-speed running with the control of the sampling time of a vehicle speed pulse signal.
CONSTITUTION: A pulse signal Sp having a frequency corresponding to the speed of the vehicle is counted 1 within a prescribed sampling time T decided by a timing signal Tp outputted from a timing signal generating circuit 5 and is indicated digitally 4 as an information for the speed of the vehicle. The vehicle-speed pulse signal Sp is counted also in quadranary counter 6 for the sampling time T, and when the counted value thereof does not reach 40, the frequency division ratio of a variable frequency dividing circuit 7 is set at N, while it is set at N' (N'>N) when the value exceeds 40. When the speed of the vehicle is 40km/h or more, the cycle of the timing signal Tp is made longer and thus the compensation of errors in measurement due to the change of the dynamic radius of the tyre at the time of high-speed running is performed.
COPYRIGHT: (C)1981,JPO&Japio
JP16034879A 1979-12-12 1979-12-12 Electronic speed meter with circuit for compensating speed of vehicle Pending JPS5684556A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16034879A JPS5684556A (en) 1979-12-12 1979-12-12 Electronic speed meter with circuit for compensating speed of vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16034879A JPS5684556A (en) 1979-12-12 1979-12-12 Electronic speed meter with circuit for compensating speed of vehicle

Publications (1)

Publication Number Publication Date
JPS5684556A true JPS5684556A (en) 1981-07-09

Family

ID=15713033

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16034879A Pending JPS5684556A (en) 1979-12-12 1979-12-12 Electronic speed meter with circuit for compensating speed of vehicle

Country Status (1)

Country Link
JP (1) JPS5684556A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59125068A (en) * 1982-12-30 1984-07-19 Nippon Seiki Co Ltd Frequency meter
JPS59125069A (en) * 1982-12-30 1984-07-19 Nippon Seiki Co Ltd Frequency meter
JPS62189658U (en) * 1986-05-23 1987-12-02

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59125068A (en) * 1982-12-30 1984-07-19 Nippon Seiki Co Ltd Frequency meter
JPS59125069A (en) * 1982-12-30 1984-07-19 Nippon Seiki Co Ltd Frequency meter
JPS6367143B2 (en) * 1982-12-30 1988-12-23 Japan Engine Valve Mfg
JPS6367142B2 (en) * 1982-12-30 1988-12-23 Japan Engine Valve Mfg
JPS62189658U (en) * 1986-05-23 1987-12-02

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