JPH0340280B2 - - Google Patents
Info
- Publication number
- JPH0340280B2 JPH0340280B2 JP58155959A JP15595983A JPH0340280B2 JP H0340280 B2 JPH0340280 B2 JP H0340280B2 JP 58155959 A JP58155959 A JP 58155959A JP 15595983 A JP15595983 A JP 15595983A JP H0340280 B2 JPH0340280 B2 JP H0340280B2
- Authority
- JP
- Japan
- Prior art keywords
- optical fiber
- spacer
- line sensor
- underground
- longitudinal direction
- 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 - Lifetime
Links
- 239000013307 optical fiber Substances 0.000 claims description 27
- 125000006850 spacer group Chemical group 0.000 claims description 15
- 230000005856 abnormality Effects 0.000 claims description 12
- 238000012544 monitoring process Methods 0.000 claims description 5
- 239000011247 coating layer Substances 0.000 claims 1
- 230000003287 optical effect Effects 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000006378 damage Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000004069 differentiation 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
- 238000009434 installation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 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
- 230000008733 trauma Effects 0.000 description 1
Landscapes
- Pipeline Systems (AREA)
- Earth Drilling (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15595983A JPS6049200A (ja) | 1983-08-25 | 1983-08-25 | 地中埋設物異常監視システム |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15595983A JPS6049200A (ja) | 1983-08-25 | 1983-08-25 | 地中埋設物異常監視システム |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6049200A JPS6049200A (ja) | 1985-03-18 |
| JPH0340280B2 true JPH0340280B2 (de) | 1991-06-18 |
Family
ID=15617270
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15595983A Granted JPS6049200A (ja) | 1983-08-25 | 1983-08-25 | 地中埋設物異常監視システム |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6049200A (de) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4732840B2 (ja) * | 2005-09-06 | 2011-07-27 | 日立電線株式会社 | 衝撃検知光ファイバセンサ、応力集中板及びその製造方法 |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0676172A (ja) * | 1991-04-16 | 1994-03-18 | Sumitomo Electric Ind Ltd | 防犯用検知装置 |
| JP3536512B2 (ja) * | 1996-03-15 | 2004-06-14 | 松下電工株式会社 | 生体信号検出装置 |
| US6030347A (en) * | 1996-01-12 | 2000-02-29 | Matsushita Electric Works, Ltd. | Biological-signal detecting device |
| JP3536500B2 (ja) * | 1996-01-12 | 2004-06-07 | 松下電工株式会社 | 生体信号検出装置 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57122352A (en) * | 1981-01-23 | 1982-07-30 | Fujitsu Ltd | System for detecting destruction of road |
| JPS5855731A (ja) * | 1981-09-28 | 1983-04-02 | Fujitsu Ltd | 圧力センサ |
-
1983
- 1983-08-25 JP JP15595983A patent/JPS6049200A/ja active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57122352A (en) * | 1981-01-23 | 1982-07-30 | Fujitsu Ltd | System for detecting destruction of road |
| JPS5855731A (ja) * | 1981-09-28 | 1983-04-02 | Fujitsu Ltd | 圧力センサ |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4732840B2 (ja) * | 2005-09-06 | 2011-07-27 | 日立電線株式会社 | 衝撃検知光ファイバセンサ、応力集中板及びその製造方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6049200A (ja) | 1985-03-18 |
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