JPH0435798Y2 - - Google Patents
Info
- Publication number
- JPH0435798Y2 JPH0435798Y2 JP19511883U JP19511883U JPH0435798Y2 JP H0435798 Y2 JPH0435798 Y2 JP H0435798Y2 JP 19511883 U JP19511883 U JP 19511883U JP 19511883 U JP19511883 U JP 19511883U JP H0435798 Y2 JPH0435798 Y2 JP H0435798Y2
- Authority
- JP
- Japan
- Prior art keywords
- optical fiber
- line sensor
- underground
- receiving element
- light receiving
- 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.)
- Expired
Links
- 239000013307 optical fiber Substances 0.000 claims description 30
- 230000005856 abnormality Effects 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 7
- 239000011247 coating layer Substances 0.000 claims description 5
- 230000004069 differentiation Effects 0.000 claims description 4
- 238000012806 monitoring device Methods 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 208000014674 injury Diseases 0.000 description 4
- 230000006378 damage Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 230000008733 trauma Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
Landscapes
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
- Testing Of Optical Devices Or Fibers (AREA)
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 JPS60107804U (ja) | 1985-07-22 |
| JPH0435798Y2 true JPH0435798Y2 (ru) | 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 (ru) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007515659A (ja) * | 2003-10-23 | 2007-06-14 | プリスミアン・カビ・エ・システミ・エネルジア・ソチエタ・ア・レスポンサビリタ・リミタータ | 漏れ検出装置が組み込まれたガス配管用途のための通信光ケーブル |
-
1983
- 1983-12-19 JP JP19511883U patent/JPS60107804U/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60107804U (ja) | 1985-07-22 |
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