Global Patent Index - EP 1004030 A1

EP 1004030 A1 2000-05-31 - METHOD FOR MEASURING A MAGNETIC FIELD AND DEVICE FOR CARRYING OUT SAID METHOD

Title (en)

METHOD FOR MEASURING A MAGNETIC FIELD AND DEVICE FOR CARRYING OUT SAID METHOD

Title (de)

VERFAHREN ZUM MESSEN EINES MAGNETFELDES UND EINRICHTUNG ZUR DURCHFÜHRUNG DES VERFAHRENS

Title (fr)

PROCEDE POUR MESURER UN CHAMP MAGNETIQUE ET INSTALLATION POUR LA MISE EN OEUVRE DUDIT PROCEDE

Publication

EP 1004030 A1 (DE)

Application

EP 98945044 A

Priority

  • DE 9802081 W
  • DE 19734894 A

Abstract (en)

[origin: WO9908120A1] According to the inventive method, two polarised light signals (L1, L2) are sent in opposite directions by a sensor device (1) indicating the Faraday effect. In order to minimise the influence of the light components reflected on the light path (14,24,14',24'), one light signal (L1) is transmitted on a wavelength ( lambda 1) and the other (L2) is transmitted on another wavelength ( lambda 2). The inventive method can be used in vibration compensated magneto optic current transformers to avoid the influence of retroreflections on the measuring signal (M).

IPC 1-7 (main, further and additional classification)

G01R 15/24; G01R 33/032

IPC 8 full level (invention and additional information)

G01R 15/24 (2006.01); G01R 33/032 (2006.01)

CPC (invention and additional information)

G01R 33/0322 (2013.01); G01R 15/246 (2013.01)

Citation (search report)

See references of WO 9908120A1

Designated contracting state (EPC)

CH DE FR GB LI

EPO simple patent family

WO 9908120 A1 19990218; EP 1004030 A1 20000531; US 6297625 B1 20011002

INPADOC legal status


2001-09-26 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20010313

2000-12-13 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20001031

2000-05-31 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20000131

2000-05-31 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): CH DE FR GB LI