Processing

Please wait...

Settings

Settings

1. WO2000039531 - FIBRE BRAGG GRATING SENSORS FOR MEASURING A PHYSICAL MAGNITUDE

Publication Number WO/2000/039531
Publication Date 06.07.2000
International Application No. PCT/DE1999/003937
International Filing Date 09.12.1999
Chapter 2 Demand Filed 24.07.2000
IPC
G01D 5/353 2006.01
GPHYSICS
01MEASURING; TESTING
DMEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED BY A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; TRANSFERRING OR TRANSDUCING ARRANGEMENTS NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
5Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
26using optical means, i.e. using infra-red, visible or ultra-violet light
32with attenuation or whole or partial obturation of beams of light
34the beams of light being detected by photocells
353influencing the transmission properties of an optical fibre
CPC
G01D 5/35383
GPHYSICS
01MEASURING; TESTING
DMEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
5Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
26characterised by optical transfer means, i.e. using infra-red, visible, or ultra-violet light
32with attenuation or whole or partial obturation of beams of light
34the beams of light being detected by photocells
353influencing the transmission properties of an optical fibre
35383using multiple sensor devices using multiplexing techniques
Applicants
  • SIEMENS AKTIENGESELLSCHAFT [DE/DE]; Wittelsbacherplatz 2 D-80333 München, DE (AllExceptUS)
  • BECHTOLD, Mario [DE/DE]; DE (UsOnly)
  • KRÄMMER, Peter [DE/DE]; DE (UsOnly)
Inventors
  • BECHTOLD, Mario; DE
  • KRÄMMER, Peter; DE
Common Representative
  • SIEMENS AKTIENGESELLSCHAFT; Postfach 22 16 34 D-80506 München, DE
Priority Data
198 59 994.323.12.1998DE
Publication Language German (DE)
Filing Language German (DE)
Designated States
Title
(DE) BRAGG-GITTER-SENSORANORDNUNG ZUR ABTASTUNG EINER PHYSIKALISCHEN GRÖSSE
(EN) FIBRE BRAGG GRATING SENSORS FOR MEASURING A PHYSICAL MAGNITUDE
(FR) DETECTEURS A RESEAUX DE BRAGG DANS UNE FIBRE OPTIQUE, POUR LA MESURE DE GRANDEURS PHYSIQUES
Abstract
(DE)
Die Bragg-Gitter-Sensoranordnung weist mehrere in einer optischen Faser (1) nacheinander angeordnete Bragg-Gitter (1i, i = 1, 2, ... N) mit voneinander verschiedenen Bragg-Wellenlängen ($g(l)i) auf. In der Faser werden nahe bei diesen Bragg-Wellenlängen liegende Wellenlängen ($g(l)0i), die mit voneinander verschiedenen Frequenzen ($g(v)i) individuell variiert sind, gleichzeitig zu den Gittern übertragen und die im wesentlichen gleichzeitig gitterreflektierten frequenzcodierten Bragg-Wellenlängen frequenzmäßig getrennt und phasendekodiert. Vorteil: preisgünstig, insbes. bei mehreren Fasern.
(EN)
The fibre Bragg grating sensor array has several Bragg gratings (1i, i = 1,2, ... N) disposed one after the other in an optical fibre (1) with different Bragg wavelengths ($g(l)i). The wavelengths ($g(l)0i) located in the fibre in the proximity of said Bragg wavelengths, which are varied individually with different frequencies ($g(v)i), are simultaneously transmitted to the gratings and the substantially simultaneous grating reflecting frequency coded Bragg wavelengths are separated according to their frequency and phase decoded. The invention provides the advantage of being cost-effective, especially when several fibres are used.
(FR)
Dispositif détecteur à réseaux de Bragg qui comporte plusieurs réseaux de Bragg (1i, i = 1,2, ... N) disposés les uns après les autres dans une fibre optique (1) et ayant des longueurs d'onde de Bragg ($g(l)i) différentes. Dans la fibre, des longueurs d'onde ($g(l)0i), proches de ces longueurs d'onde de Bragg, qui sont modifiées individuellement à l'aide de fréquences ($g(v)i) différentes les unes des autres, sont transmises simultanément aux réseaux et les longueurs d'onde de Bragg codées en fréquence et pour l'essentiel simultanément réfléchies par les réseaux sont séparées selon la fréquence et décodées en phase. Le dispositif selon la présente invention est peu onéreux, en particulier lorsqu'il possède plusieurs fibres.
Also published as
US09869284
Latest bibliographic data on file with the International Bureau