Stuttgart 2012 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 48: Laseranwendungen: opt. Messtechnik

Q 48.2: Vortrag

Donnerstag, 15. März 2012, 14:30–14:45, V38.01

Optical fiber sensors for simultaneous temperature und mechanical stress monitoring of medium voltage power cables — •Alexander Doering1, Wolfgang Schippers2, Martin Angelmahr1, Jörg Burgeier1, and Wolfgang Schade1,21Fraunhofer Heinrich Hertz Institut, Am Stollen 19B, 38640 Goslar, Germany — 2Technische Universität Clausthal, Institut für Energieforschung und Physikalische Technologien, Am Stollen 19B, 38640 Goslar, Germany

The monitoring of power cables in industry complexes and power plants is getting more and more important due to the increasing automatization level and the resulting system relevance of the cable. For the determination of the failure probability, two parameters are mainly of interest: the thermal and the mechanical stress the cable is exposed to. For monitoring these influences, a fiber optical sensor system based on two physical measuring principles is presented. The distributed temperature sensing (DTS) is realized by measuring the anti-stokes-/stokes intensity ratio of Raman backscattering signal. The attenuation difference in the fiber between the Stokes and anti-Stokes signal is compensated by an innovative measuring system. The mechanical stress is monitored by applying fiber Bragg grating (FBG) sensors integrated within the voltage cable.

At the moment the system is employed in rail mounted gantry cranes - first measurement results are presented.

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