JPS60107804U - 地中埋設物の異常監視装置 - Google Patents

地中埋設物の異常監視装置

Info

Publication number
JPS60107804U
JPS60107804U JP19511883U JP19511883U JPS60107804U JP S60107804 U JPS60107804 U JP S60107804U JP 19511883 U JP19511883 U JP 19511883U JP 19511883 U JP19511883 U JP 19511883U JP S60107804 U JPS60107804 U JP S60107804U
Authority
JP
Japan
Prior art keywords
abnormality monitoring
optical fiber
underground objects
monitoring device
line sensor
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
Application number
JP19511883U
Other languages
English (en)
Japanese (ja)
Other versions
JPH0435798Y2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html
Inventor
永野　宏郎
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 Cable Ltd
Original Assignee
Hitachi Cable 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 Cable Ltd filed Critical Hitachi Cable Ltd
Priority to JP19511883U priority Critical patent/JPS60107804U/ja
Publication of JPS60107804U publication Critical patent/JPS60107804U/ja
Application granted granted Critical
Publication of JPH0435798Y2 publication Critical patent/JPH0435798Y2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
  • Testing Of Optical Devices Or Fibers (AREA)
JP19511883U 1983-12-19 1983-12-19 地中埋設物の異常監視装置 Granted JPS60107804U (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19511883U JPS60107804U (ja) 1983-12-19 1983-12-19 地中埋設物の異常監視装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19511883U JPS60107804U (ja) 1983-12-19 1983-12-19 地中埋設物の異常監視装置

Publications (2)

Publication Number Publication Date
JPS60107804U true JPS60107804U (ja) 1985-07-22
JPH0435798Y2 JPH0435798Y2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1992-08-25

Family

ID=30752615

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19511883U Granted JPS60107804U (ja) 1983-12-19 1983-12-19 地中埋設物の異常監視装置

Country Status (1)

Country Link
JP (1) JPS60107804U (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1678541A1 (en) * 2003-10-23 2006-07-12 Prysmian Cavi e Sistemi Energia S.r.l. Telecommunication optical cable for gas pipeline application having built-in leakage detecting device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1678541A1 (en) * 2003-10-23 2006-07-12 Prysmian Cavi e Sistemi Energia S.r.l. Telecommunication optical cable for gas pipeline application having built-in leakage detecting device

Also Published As

Publication number Publication date
JPH0435798Y2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1992-08-25

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