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JPS55159164A - Detector of cable fault point - Google Patents

Detector of cable fault point

Info

Publication number
JPS55159164A
JPS55159164A JP6710979A JP6710979A JPS55159164A JP S55159164 A JPS55159164 A JP S55159164A JP 6710979 A JP6710979 A JP 6710979A JP 6710979 A JP6710979 A JP 6710979A JP S55159164 A JPS55159164 A JP S55159164A
Authority
JP
Japan
Prior art keywords
carrier
fault point
cable
detector
terminal
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
JP6710979A
Other languages
Japanese (ja)
Inventor
Haruo Ogura
Eikichi Tanaka
Tomoji Maruyama
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.)
Ando Electric Co Ltd
Nippon Telegraph and Telephone Corp
Original Assignee
Ando Electric Co Ltd
Nippon Telegraph and Telephone Corp
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 Ando Electric Co Ltd, Nippon Telegraph and Telephone Corp filed Critical Ando Electric Co Ltd
Priority to JP6710979A priority Critical patent/JPS55159164A/en
Publication of JPS55159164A publication Critical patent/JPS55159164A/en
Pending legal-status Critical Current

Links

Landscapes

  • Locating Faults (AREA)

Abstract

PURPOSE: To obtain the position of a fault point with good accuracy by applying the carrier wave having undergone amplitude modulation to a cable through a hybrid circuit, fetching the waves reflected from the fault point and comparing the phase of the envelope of the time when transmitted from the input side and that of the reflected waves.
CONSTITUTION: The carrier S of a carrier signal generator 1A is applied to the cable 3 to be measured and terminal device 4 by way of a hybrid circuit 3. When the cable 3 and terminal device 4 are matched, the carrier S does not come out from the terminal 23 of the circuit 2, but when a fault occurs in the cable 3, the carrier S reflects at the fault point and returns to the terminal 21. On the other hand, the signal which the carrier S of the signal generator 1A is amplitude-modulated 6 by the modulating wave M is applied as a reference signal to a phase detector 7. The modulating wave M having been demodulated by a detector 5 connected to the terminal 23 of the circuit 2 is applied to the phase detector 7 and is compared with the above-mentioned reference signal, whereby the phase difference of both is detected and the distance up to the fault point is obtained.
COPYRIGHT: (C)1980,JPO&Japio
JP6710979A 1979-05-30 1979-05-30 Detector of cable fault point Pending JPS55159164A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6710979A JPS55159164A (en) 1979-05-30 1979-05-30 Detector of cable fault point

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6710979A JPS55159164A (en) 1979-05-30 1979-05-30 Detector of cable fault point

Publications (1)

Publication Number Publication Date
JPS55159164A true JPS55159164A (en) 1980-12-11

Family

ID=13335390

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6710979A Pending JPS55159164A (en) 1979-05-30 1979-05-30 Detector of cable fault point

Country Status (1)

Country Link
JP (1) JPS55159164A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8107118B2 (en) 2006-07-11 2012-01-31 Konica Minolta Business Technologies, Inc. Print control apparatus that controls printing device performing printing using print sheet having tab
CN107515355A (en) * 2017-10-18 2017-12-26 国网江苏省电力公司南通供电公司 Cable fault location device and its data processing method
JP2020046325A (en) * 2018-09-20 2020-03-26 三菱電機株式会社 Degradation degree estimating device and degradation degree estimation method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4960615A (en) * 1972-10-13 1974-06-12
JPS516768A (en) * 1974-07-06 1976-01-20 Japan Broadcasting Corp Hanshahanokyodo oyobi chenjikansokuteihoho

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4960615A (en) * 1972-10-13 1974-06-12
JPS516768A (en) * 1974-07-06 1976-01-20 Japan Broadcasting Corp Hanshahanokyodo oyobi chenjikansokuteihoho

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8107118B2 (en) 2006-07-11 2012-01-31 Konica Minolta Business Technologies, Inc. Print control apparatus that controls printing device performing printing using print sheet having tab
CN107515355A (en) * 2017-10-18 2017-12-26 国网江苏省电力公司南通供电公司 Cable fault location device and its data processing method
JP2020046325A (en) * 2018-09-20 2020-03-26 三菱電機株式会社 Degradation degree estimating device and degradation degree estimation method

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