JPS5559367A - Earthquake predicting method via optical fiber - Google Patents
Earthquake predicting method via optical fiberInfo
- Publication number
- JPS5559367A JPS5559367A JP13227678A JP13227678A JPS5559367A JP S5559367 A JPS5559367 A JP S5559367A JP 13227678 A JP13227678 A JP 13227678A JP 13227678 A JP13227678 A JP 13227678A JP S5559367 A JPS5559367 A JP S5559367A
- Authority
- JP
- Japan
- Prior art keywords
- microbending
- earthquake
- optical fiber
- hole
- fiber
- 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
- 239000013307 optical fiber Substances 0.000 title abstract 3
- 239000000835 fiber Substances 0.000 abstract 2
- 230000003287 optical effect Effects 0.000 abstract 2
- 239000011435 rock Substances 0.000 abstract 2
- 230000005540 biological transmission Effects 0.000 abstract 1
- 230000001902 propagating effect Effects 0.000 abstract 1
- 239000011347 resin Substances 0.000 abstract 1
- 229920005989 resin Polymers 0.000 abstract 1
- 208000024891 symptom Diseases 0.000 abstract 1
- 229920001187 thermosetting polymer Polymers 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/01—Measuring or predicting earthquakes
Landscapes
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Environmental & Geological Engineering (AREA)
- Geology (AREA)
- Remote Sensing (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Geophysics (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
PURPOSE:To predict the earthquake by making use of the suddeh increment of the transmission loss of the optical fiber caused by the microbending. CONSTITUTION:A hole is drilled to the rocks R of the sands M at seashore S, and optical fiber core F, which features the refractive index error of under 1% and is liable to receive the microbending with no microbending preventing buffer layer coated, is inserted into the hole. Then thermosetting resin D is filled into the gap part of the hole. Thus when rocks R protrudes to show a premonitory symptom of the earthquake, core F has the microbending due to the side pressure to give a sudden increment of the propagation loss. In this connection, the optical power propagating fiber F via both ends A and B of fiber F is measured, and thus the earthquake can be predicted easily by checking the fluctuation of the optical power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13227678A JPS5559367A (en) | 1978-10-27 | 1978-10-27 | Earthquake predicting method via optical fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13227678A JPS5559367A (en) | 1978-10-27 | 1978-10-27 | Earthquake predicting method via optical fiber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5559367A true JPS5559367A (en) | 1980-05-02 |
Family
ID=15077487
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13227678A Pending JPS5559367A (en) | 1978-10-27 | 1978-10-27 | Earthquake predicting method via optical fiber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5559367A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1126290A1 (en) * | 2000-02-16 | 2001-08-22 | European Community | Improvements in or relating to seismic wave measuring devices |
-
1978
- 1978-10-27 JP JP13227678A patent/JPS5559367A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1126290A1 (en) * | 2000-02-16 | 2001-08-22 | European Community | Improvements in or relating to seismic wave measuring devices |
| WO2001061381A1 (en) * | 2000-02-16 | 2001-08-23 | European Community | Improvements in or relating to seismic wave measuring devices |
| US6823963B2 (en) | 2000-02-16 | 2004-11-30 | European Community | Seismic wave measuring devices |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE68920270D1 (en) | Fiber optic connector. | |
| JPS57106838A (en) | Optical fiber for sensor | |
| Morey et al. | Applications of fiber grating sensors | |
| CN102507497A (en) | Refractive index sensor based on optical fiber and measurement method | |
| ES2000976A6 (en) | Optical waveguide devices. | |
| JPS5559367A (en) | Earthquake predicting method via optical fiber | |
| ES470963A1 (en) | Optical fibre manufacture | |
| FI890479A (en) | optical waveguides | |
| JPS56104304A (en) | Optical fiber for infrared light | |
| CN210833434U (en) | Reinforcing steel bar long-term corrosion monitoring sensor based on long-period fiber grating sleeve structure | |
| CN210833433U (en) | Reinforcing steel bar long-term corrosion monitoring sensor based on Fabry-Perot optical fiber array | |
| JPS5739316A (en) | Liquid level detecting sensor | |
| JPS5413356A (en) | Optical excitation of optical fiber | |
| JPS5699306A (en) | Single mode optical fiber which preserves plane of polarization | |
| JPS56112621A (en) | Optical detecting device for temperature | |
| JPS57124228A (en) | Standard optical fiber for excitation | |
| Lazarchik | Bragg fiber-optic waveguides(Breggovskie volokonnye svetovody) | |
| JPS5778506A (en) | Simulator of optical energizing mode distribution | |
| Dianov et al. | Stimulated four-photon nonlinear processes in low-mode glass fiber lightguides | |
| JPS5580034A (en) | Inspection of optical fiber preform | |
| JPS5443750A (en) | Directive coupler for optical fibers and production therefor | |
| JPS5734503A (en) | Optical monitoring device | |
| Coppa et al. | Stratification methods in waveguiding structures | |
| Hawk | Multimode waveguide attenuation measurements | |
| FR2368050A1 (en) | Optical fibre consisting of a solid core and liquid in a sheath - the liquid having lower refractive index than the core |