JPS54150160A - Landslide detecting system - Google Patents
Landslide detecting systemInfo
- Publication number
- JPS54150160A JPS54150160A JP5923078A JP5923078A JPS54150160A JP S54150160 A JPS54150160 A JP S54150160A JP 5923078 A JP5923078 A JP 5923078A JP 5923078 A JP5923078 A JP 5923078A JP S54150160 A JPS54150160 A JP S54150160A
- Authority
- JP
- Japan
- Prior art keywords
- landslide
- optical fiber
- fiber cable
- supervisory station
- photo
- 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
Landscapes
- Testing Or Calibration Of Command Recording Devices (AREA)
Abstract
PURPOSE: To surely detect landslides in a supervisory station by using a bidirectional light transmission system using one optical fiber cable.
CONSTITUTION: A landslide supervisory station 6 is installed near the specific landslide dangerous zone 5. An optical fiber cable 8 is installed in loop form between the supervisory station 6 and the protection wall 2 along the road 7 in the landslide dangerous zone 5. Then, when a large-scale landslide occurs between the points 9 and 10 within the landslide dangerous zone 5 and the optical fiber cable 8 is cut off at said points 9, 10 then the signal out from a light emitting circuit 12 and reaching a photo detecting circuit 15 by passing through a photo branching filter 13, optical fiber cable 8 and photo branching filter 14 and the signal out from a light emitting circuit 16 and reaching a photo detecting circuit 17 both fail to reach there, causing a display and alarm device 18 to operate. This lets the point where the landslide has occured and its range be known in the supervisory station 6.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5923078A JPS54150160A (en) | 1978-05-17 | 1978-05-17 | Landslide detecting system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5923078A JPS54150160A (en) | 1978-05-17 | 1978-05-17 | Landslide detecting system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54150160A true JPS54150160A (en) | 1979-11-26 |
Family
ID=13107359
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5923078A Pending JPS54150160A (en) | 1978-05-17 | 1978-05-17 | Landslide detecting system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54150160A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0634400A (en) * | 1992-07-22 | 1994-02-08 | Japan Aviation Electron Ind Ltd | Geographical displacement detecting device |
JP2010078593A (en) * | 2008-08-28 | 2010-04-08 | Nippon Mikuniya Kk | Scour measuring device of river |
CN104111034A (en) * | 2013-04-18 | 2014-10-22 | 王健 | Cone monitor technology |
-
1978
- 1978-05-17 JP JP5923078A patent/JPS54150160A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0634400A (en) * | 1992-07-22 | 1994-02-08 | Japan Aviation Electron Ind Ltd | Geographical displacement detecting device |
JP2010078593A (en) * | 2008-08-28 | 2010-04-08 | Nippon Mikuniya Kk | Scour measuring device of river |
CN104111034A (en) * | 2013-04-18 | 2014-10-22 | 王健 | Cone monitor technology |
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