JPS6435284A - Magnetic field distribution sensor - Google Patents
Magnetic field distribution sensorInfo
- Publication number
- JPS6435284A JPS6435284A JP7607287A JP7607287A JPS6435284A JP S6435284 A JPS6435284 A JP S6435284A JP 7607287 A JP7607287 A JP 7607287A JP 7607287 A JP7607287 A JP 7607287A JP S6435284 A JPS6435284 A JP S6435284A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic field
- fiber
- currents
- detected
- high sensitivity
- 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
Abstract
PURPOSE:To effectively utilize the low loss property and economical efficiency of an optical fiber and to economically measure a magnetic field over a wide range with high sensitivity, by obtaining DC or AC magnetic field intensity data at a plurality of the points on the optical fiber with high sensitivity by utilizing Lorentz force. CONSTITUTION:AC currents are allowed to flow to the coating of a metal coated fiber from AC current sources 8, 9, 10 and the fiber is distorted in an alternating manner by the Lorentz forces acting between a magnetic field and the currents and the interference output generated by this AC strain is detected by a light detector 12 or 13 and a weak magnetic field is detected by utilizing that AC amplitude reflects the intensity of a magnetic field. In order to prevent that the fundamental frequencies or higher harmonics frequencies of respective mechanical resonance are not superposed each other, one of or both of the respective support intervals of support tensions are set to a condition different from other condition.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7607287A JPS6435284A (en) | 1987-03-31 | 1987-03-31 | Magnetic field distribution sensor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7607287A JPS6435284A (en) | 1987-03-31 | 1987-03-31 | Magnetic field distribution sensor |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6435284A true JPS6435284A (en) | 1989-02-06 |
Family
ID=13594593
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7607287A Pending JPS6435284A (en) | 1987-03-31 | 1987-03-31 | Magnetic field distribution sensor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6435284A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999057571A1 (en) * | 1998-04-30 | 1999-11-11 | Hitachi Cable, Ltd. | Magnetic sensor using optical fiber |
US6812696B2 (en) * | 2000-03-21 | 2004-11-02 | The Johns Hopkins University | Apparatus and methods using mechanical resonators to enhance sensitivity in lorentz force magnetometers |
WO2012089818A1 (en) | 2010-12-31 | 2012-07-05 | Shell Internationale Research Maatschappij B.V. | Method and system for determining the location of a fiber optic channel along the length of a fiber optic cable |
WO2014001807A2 (en) * | 2012-06-29 | 2014-01-03 | Optasense Holdings Limited | Fibre optic sensing |
-
1987
- 1987-03-31 JP JP7607287A patent/JPS6435284A/en active Pending
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999057571A1 (en) * | 1998-04-30 | 1999-11-11 | Hitachi Cable, Ltd. | Magnetic sensor using optical fiber |
US6812696B2 (en) * | 2000-03-21 | 2004-11-02 | The Johns Hopkins University | Apparatus and methods using mechanical resonators to enhance sensitivity in lorentz force magnetometers |
WO2012089818A1 (en) | 2010-12-31 | 2012-07-05 | Shell Internationale Research Maatschappij B.V. | Method and system for determining the location of a fiber optic channel along the length of a fiber optic cable |
WO2014001807A2 (en) * | 2012-06-29 | 2014-01-03 | Optasense Holdings Limited | Fibre optic sensing |
WO2014001807A3 (en) * | 2012-06-29 | 2014-07-10 | Optasense Holdings Limited | Fibre optic sensing |
GB2503498B (en) * | 2012-06-29 | 2017-06-14 | Optasense Holdings Ltd | Fibre optic sensing |
US9746393B2 (en) | 2012-06-29 | 2017-08-29 | Optasense Holdings Limited | Fibre optic sensing |
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