JPS55163484A - Time synchronizing method - Google Patents

Time synchronizing method

Info

Publication number
JPS55163484A
JPS55163484A JP7113679A JP7113679A JPS55163484A JP S55163484 A JPS55163484 A JP S55163484A JP 7113679 A JP7113679 A JP 7113679A JP 7113679 A JP7113679 A JP 7113679A JP S55163484 A JPS55163484 A JP S55163484A
Authority
JP
Japan
Prior art keywords
pulse
clock
laser
clocks
optical fibers
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
JP7113679A
Other languages
Japanese (ja)
Inventor
Yasuji Suzaki
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 JP7113679A priority Critical patent/JPS55163484A/en
Publication of JPS55163484A publication Critical patent/JPS55163484A/en
Pending legal-status Critical Current

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  • Electric Clocks (AREA)

Abstract

PURPOSE: To synchronize times on clocks apart each other correctly by connecting a light source of pulse laser beam and a plural clock through optical fiber.
CONSTITUTION: When a laser pulse is incident to optical fibers 4, 5, 6 from a pulse laser oscillator 1 at a station arranged with a standard clock through a light pulse divider 3, the pulse reaches light pulse detectors 7a, 7b, 7c of terminal stations A, B, C at times of t+l1/vg, t+l2/vg and t+l3/vg (vg: group velocity of pulse propagation in optical fibers; l1Wl3: lengths of fibes 4W6). Clock reading devices 8a, 8b, 8c are actuated with the pulse as a trigger, times on synchronized clocks 9a, 9b, 9c are read, the synchronized clocks are calibrated according to a time lag of the laser pulse, thus synchronizing each clock.
COPYRIGHT: (C)1980,JPO&Japio
JP7113679A 1979-06-08 1979-06-08 Time synchronizing method Pending JPS55163484A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7113679A JPS55163484A (en) 1979-06-08 1979-06-08 Time synchronizing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7113679A JPS55163484A (en) 1979-06-08 1979-06-08 Time synchronizing method

Publications (1)

Publication Number Publication Date
JPS55163484A true JPS55163484A (en) 1980-12-19

Family

ID=13451855

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7113679A Pending JPS55163484A (en) 1979-06-08 1979-06-08 Time synchronizing method

Country Status (1)

Country Link
JP (1) JPS55163484A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60160777A (en) * 1984-01-31 1985-08-22 Toyo Commun Equip Co Ltd Time synchronism system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60160777A (en) * 1984-01-31 1985-08-22 Toyo Commun Equip Co Ltd Time synchronism system

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