JPS5473085A - Earthquake sensor using optical fibers - Google Patents
Earthquake sensor using optical fibersInfo
- Publication number
- JPS5473085A JPS5473085A JP14014877A JP14014877A JPS5473085A JP S5473085 A JPS5473085 A JP S5473085A JP 14014877 A JP14014877 A JP 14014877A JP 14014877 A JP14014877 A JP 14014877A JP S5473085 A JPS5473085 A JP S5473085A
- Authority
- JP
- Japan
- Prior art keywords
- detecting part
- fiber cable
- photo detecting
- fiber
- troubles
- 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
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
- Geophysics And Detection Of Objects (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
PURPOSE:To achieve the improvement in sensitivity and reduction in troubles by disposing a fiber element bundle to photo detecting part. CONSTITUTION:A photo detector 151 is constituted by one end of the fiber cable bundle 15 connected to a photoelectric converter 16 with respect to the condensing optical system 131 mounted to one end of one fiber cable 13 connected to an optical branching filter 12. Then, when earthquake occurs, the light beam focussed at the condensing optical system 131 in the earthquake sensor 14 causes a position deviation and enters the position deviated from the center of the photo detecting part 151. It is then converted to an electric signal by a photoelectric transducer 16, after which the electric signal is subjected to specified processing in a signal processing part 17 and is then inputted to a central processing unit 18. Since the photo detecting part 151 is constituted by the section of the fiber cable bundle 15 comprising disposing a multiplicity of fiber cables of a micro diameter in concentrical circular form, the sensitivity is increased and in addition, troubles are less because there are no mechanical moving parts.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14014877A JPS5473085A (en) | 1977-11-22 | 1977-11-22 | Earthquake sensor using optical fibers |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14014877A JPS5473085A (en) | 1977-11-22 | 1977-11-22 | Earthquake sensor using optical fibers |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5473085A true JPS5473085A (en) | 1979-06-12 |
Family
ID=15261978
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14014877A Pending JPS5473085A (en) | 1977-11-22 | 1977-11-22 | Earthquake sensor using optical fibers |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5473085A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58130236U (en) * | 1982-02-26 | 1983-09-02 | 赤井電機株式会社 | Acoustic vibration detection device |
JPS62184437U (en) * | 1986-05-15 | 1987-11-24 |
-
1977
- 1977-11-22 JP JP14014877A patent/JPS5473085A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58130236U (en) * | 1982-02-26 | 1983-09-02 | 赤井電機株式会社 | Acoustic vibration detection device |
JPS62184437U (en) * | 1986-05-15 | 1987-11-24 |
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