JPS6435284A - Magnetic field distribution sensor - Google Patents

Magnetic field distribution sensor

Info

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
Application number
JP7607287A
Other languages
Japanese (ja)
Inventor
Haruo Okamura
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP7607287A priority Critical patent/JPS6435284A/en
Publication of JPS6435284A publication Critical patent/JPS6435284A/en
Pending legal-status Critical Current

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.
JP7607287A 1987-03-31 1987-03-31 Magnetic field distribution sensor Pending JPS6435284A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (7)

* Cited by examiner, † Cited by third party
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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