JPS54150160A - Landslide detecting system - Google Patents

Landslide detecting system

Info

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
Application number
JP5923078A
Other languages
Japanese (ja)
Inventor
Takaaki Asaka
Takeshige Ichida
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP5923078A priority Critical patent/JPS54150160A/en
Publication of JPS54150160A publication Critical patent/JPS54150160A/en
Pending legal-status Critical Current

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  • 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
JP5923078A 1978-05-17 1978-05-17 Landslide detecting system Pending JPS54150160A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (3)

* Cited by examiner, † Cited by third party
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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