JPS57141567A - Fault point detecting system for submarine coaxial repeating system - Google Patents
Fault point detecting system for submarine coaxial repeating systemInfo
- Publication number
- JPS57141567A JPS57141567A JP2719281A JP2719281A JPS57141567A JP S57141567 A JPS57141567 A JP S57141567A JP 2719281 A JP2719281 A JP 2719281A JP 2719281 A JP2719281 A JP 2719281A JP S57141567 A JPS57141567 A JP S57141567A
- Authority
- JP
- Japan
- Prior art keywords
- fault point
- noise signal
- pseudo noise
- pseudo
- reflected
- 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
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Locating Faults (AREA)
Abstract
PURPOSE:To detect a fault point in an easy and accurate way, by deciding the distance to the fault point from the delay time of a variable delay pseudo signal that has the maximum correlation with the pseudo signal reflected from the fault point. CONSTITUTION:The pseudo noise signal sent from a pseudo noise signal generating circuit 2 of an end office 1-1 is transmitted through submarine coaxial cables 10-1- connected via repeaters 11-1- and reflected at a fault point 12. This reflected pseudo noise signal is applied to a correlator 7 of the office 1-1, and the delay time of a variable delay unit 4 is selected so that the correlation becomes maximum with the delayed pseudo noise signal which passed through the unit 4. Then the delay time corresponding to the distance up to the fault point measured. Thus the fault point is detected in an easy and accurate way for a submarine coaxial repeating system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2719281A JPS57141567A (en) | 1981-02-26 | 1981-02-26 | Fault point detecting system for submarine coaxial repeating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2719281A JPS57141567A (en) | 1981-02-26 | 1981-02-26 | Fault point detecting system for submarine coaxial repeating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57141567A true JPS57141567A (en) | 1982-09-01 |
Family
ID=12214215
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2719281A Pending JPS57141567A (en) | 1981-02-26 | 1981-02-26 | Fault point detecting system for submarine coaxial repeating system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57141567A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002027983A2 (en) * | 2000-09-26 | 2002-04-04 | Motorola, Inc. | Distance to fault measurement using multi-path cdma signals |
| GB2480619A (en) * | 2010-05-25 | 2011-11-30 | Vetco Gray Controls Ltd | Determining the location of an electrical fault in underwater cables |
-
1981
- 1981-02-26 JP JP2719281A patent/JPS57141567A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002027983A2 (en) * | 2000-09-26 | 2002-04-04 | Motorola, Inc. | Distance to fault measurement using multi-path cdma signals |
| WO2002027983A3 (en) * | 2000-09-26 | 2002-06-06 | Motorola Inc | Distance to fault measurement using multi-path cdma signals |
| GB2480619A (en) * | 2010-05-25 | 2011-11-30 | Vetco Gray Controls Ltd | Determining the location of an electrical fault in underwater cables |
| CN102331549A (en) * | 2010-05-25 | 2012-01-25 | 韦特柯格雷控制系统有限公司 | Electrical fault location determination |
| GB2480619B (en) * | 2010-05-25 | 2014-02-19 | Vetco Gray Controls Ltd | Electrical fault location determination |
| US8803530B2 (en) | 2010-05-25 | 2014-08-12 | Vetco Gray Controls Limited | Electrical fault location determination |
| CN102331549B (en) * | 2010-05-25 | 2016-06-01 | 通用电气石油和天然气英国有限公司 | Electrical fault location is determined |
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