The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 04, 2008
Filed:
Aug. 23, 2004
Klaus Bohnert, Oberrohrdorf, CH;
Philippe Gabus, Nussbaumen, CH;
Hubert Brändle, Oberengstringen, CH;
Klaus Bohnert, Oberrohrdorf, CH;
Philippe Gabus, Nussbaumen, CH;
Hubert Brändle, Oberengstringen, CH;
ABB Research Ltd, Zurich, CH;
Abstract
The fiber-optic sensor head () for a current or magnetic field sensor comprises an optical fiber which contains a magnetooptically active sensor fiber () and at least one polarization-maintaining supply fiber (), which are optically connected, with the sensor fiber () having its fiber protective sheath removed. The sensor head () furthermore contains a capillary (), in which at least the sensor fiber () is arranged. Furthermore, the sensor head () can be bent in the area of the sensor fiber (), and a friction reducing means () is provided in the capillary (), in order to reduce the friction between the sensor fiber () and the capillary (). The friction reducing means () is advantageously an oil or a dry lubricating means (). The capillary () is advantageously encased by a capillary casing (). The sensor () allows very largely temperature-dependent measurements, is easy to install and allows measurements on large cross-section conductors.