JPS5451859A - Fault point searching system of optical fiber transmission lines - Google Patents
Fault point searching system of optical fiber transmission linesInfo
- Publication number
- JPS5451859A JPS5451859A JP11845777A JP11845777A JPS5451859A JP S5451859 A JPS5451859 A JP S5451859A JP 11845777 A JP11845777 A JP 11845777A JP 11845777 A JP11845777 A JP 11845777A JP S5451859 A JPS5451859 A JP S5451859A
- Authority
- JP
- Japan
- Prior art keywords
- fault point
- optical fiber
- fault
- searching
- fiber transmission
- 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.)
- Granted
Links
Landscapes
- Locating Faults (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
- Testing Of Optical Devices Or Fibers (AREA)
- Light Guides In General And Applications Therefor (AREA)
Abstract
PURPOSE: To make possible even the searching of fault points where detection of reflection light is infeasible by using the transmission signal in which repetitive period is constant as the distance target signal for fault point searching.
CONSTITUTION: Pulse signals P1, P2 in which repetitive period or mean repetitive period within a suitable time is constant are inputted from the left and right into an optical transmission line 3 through light transmitters 1, 7, directional couplers 2, 4 and the pulse signals P'1, P'2, outputted from the right and left are inputted to counting circuits 6, 9 through the directional couplers 4, 2 and light receivers 5, 8. From the difference in the count values of both counting circuits 6, 9, the distance l up to the fault point is obtained. Thereby, the occurrence of such a fault point of the optical fiber transmission line in which the detection of reflected light is infeasible may be normally supervised and the searching may be completed simultaneously with the occurrence of the fault
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11845777A JPS5451859A (en) | 1977-09-30 | 1977-09-30 | Fault point searching system of optical fiber transmission lines |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11845777A JPS5451859A (en) | 1977-09-30 | 1977-09-30 | Fault point searching system of optical fiber transmission lines |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5451859A true JPS5451859A (en) | 1979-04-24 |
JPS5648811B2 JPS5648811B2 (en) | 1981-11-18 |
Family
ID=14737112
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11845777A Granted JPS5451859A (en) | 1977-09-30 | 1977-09-30 | Fault point searching system of optical fiber transmission lines |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5451859A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56150323A (en) * | 1980-04-23 | 1981-11-20 | Nec Corp | Orientating system for fault point of optical fiber |
WO2022030192A1 (en) * | 2020-08-04 | 2022-02-10 | 日立Astemo株式会社 | Communication device, communication system, and communication method |
-
1977
- 1977-09-30 JP JP11845777A patent/JPS5451859A/en active Granted
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56150323A (en) * | 1980-04-23 | 1981-11-20 | Nec Corp | Orientating system for fault point of optical fiber |
WO2022030192A1 (en) * | 2020-08-04 | 2022-02-10 | 日立Astemo株式会社 | Communication device, communication system, and communication method |
Also Published As
Publication number | Publication date |
---|---|
JPS5648811B2 (en) | 1981-11-18 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS5621004A (en) | Optical sensing system | |
JPS5523612A (en) | Detection system of faulty position of optical fiber transmission system | |
JPS53130053A (en) | Circuit supervisory system of optical fiber cable | |
JPS5451859A (en) | Fault point searching system of optical fiber transmission lines | |
JPS55149553A (en) | Specific pulse inserting and removing circuit in data transmission system | |
JPS55128134A (en) | Determination system for obstruction point of optical fiber | |
JPS542700A (en) | Optical fire detector | |
JPS6486025A (en) | Reflection type photosensor | |
JPS5446059A (en) | Connectoin loss measuring apparatus for plural optical fibers | |
JPS5682428A (en) | Optical fiber sensor device | |
JPS55136934A (en) | Fault-finding method for optical-fiber transmission line | |
JPS57131033A (en) | Monitor for optical fiber transmission system | |
JPS5375705A (en) | Transmission system for optical signal | |
JPS55136933A (en) | System for searching fault point of optical fiber transmission line | |
JPS55147376A (en) | Road surface monitoring device | |
JPS5373159A (en) | Vehicle detecting method of parking meters and apparatus for the same | |
JPS55131855A (en) | Transmission protection system for control signal | |
JPS5390707A (en) | Detecting system for circuit fault | |
JPS5395674A (en) | High sensitivity signal detection system | |
JPS53136641A (en) | Fault point locator by pulse radar system | |
JPS57199932A (en) | Optical fiber measuring method | |
JPS53113500A (en) | Detector adapter | |
JPS5464942A (en) | Interuption control circuit system | |
JPS5520418A (en) | Signal processing circuit of light ray-system detector | |
JPS5510524A (en) | Monitor optical fiber and faulty position detecting method using said fiber |