JPS552914A - Car-speed detector - Google Patents

Car-speed detector

Info

Publication number
JPS552914A
JPS552914A JP7534478A JP7534478A JPS552914A JP S552914 A JPS552914 A JP S552914A JP 7534478 A JP7534478 A JP 7534478A JP 7534478 A JP7534478 A JP 7534478A JP S552914 A JPS552914 A JP S552914A
Authority
JP
Japan
Prior art keywords
pulse
car
speed
counter
pulses
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
JP7534478A
Other languages
Japanese (ja)
Inventor
Keiichi Tokuyama
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP7534478A priority Critical patent/JPS552914A/en
Publication of JPS552914A publication Critical patent/JPS552914A/en
Pending legal-status Critical Current

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  • Linear Or Angular Velocity Measurement And Their Indicating Devices (AREA)

Abstract

PURPOSE: To minimize low-speed and high-speed errors and reduce detection time, by counting the time of interval of one pulse from a car-speed sensor on the low- speed side, and increasing the number of pulses from the car-speed sensor, which is to be counted, as the speed increases.
CONSTITUTION: When a pulse from a car-speed sensor enters reference pulse counter 3, the counter, by the instruction from counter control 4, starts counting pulses from reference pulse generator 2. When the next pulse enters car-speed sensor pulse counter 1, counter control 4 counts some pulse intervals and issues an instruction to reference pulse counter 3, which counts reference pulses until the pulses from the car-speed sensor reaches a certain number. Since the number of measured pulse intervals varies with the car speed, the number of pulses counted by reference pulse counter 3 is processed by multiplier 5 as if it were counted for vertual 8 pulse intervals for alignment.
COPYRIGHT: (C)1980,JPO&Japio
JP7534478A 1978-06-23 1978-06-23 Car-speed detector Pending JPS552914A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7534478A JPS552914A (en) 1978-06-23 1978-06-23 Car-speed detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7534478A JPS552914A (en) 1978-06-23 1978-06-23 Car-speed detector

Publications (1)

Publication Number Publication Date
JPS552914A true JPS552914A (en) 1980-01-10

Family

ID=13573533

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7534478A Pending JPS552914A (en) 1978-06-23 1978-06-23 Car-speed detector

Country Status (1)

Country Link
JP (1) JPS552914A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57204457A (en) * 1981-06-12 1982-12-15 Toshiba Corp Revolving speed detecting device
JPS61270662A (en) * 1985-05-24 1986-11-29 Pioneer Electronic Corp Detecting device for rotating speed

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57204457A (en) * 1981-06-12 1982-12-15 Toshiba Corp Revolving speed detecting device
JPS61270662A (en) * 1985-05-24 1986-11-29 Pioneer Electronic Corp Detecting device for rotating speed

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