Calibrating a Distributed Fibre Optic Sensing System

A system and method for dynamically calibrating a distributed fibre optic sensing system is disclosed. The calibration system includes a light source for generating pulses of coherent light, an optical fibre arranged at least partly in a ground soil region to guide the light and a photo detector for...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	Wissem, Sfar Zaoui, Hoff, Henrik, Pohl, Clemens
Format:	Patent
Sprache:	eng
Schlagworte:	ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVEREDIN A SINGLE OTHER SUBCLASS MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC ORINFRASONIC WAVES MEASURING MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR PHYSICS TARIFF METERING APPARATUS TESTING
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Beschreibung
Zusammenfassung:	A system and method for dynamically calibrating a distributed fibre optic sensing system is disclosed. The calibration system includes a light source for generating pulses of coherent light, an optical fibre arranged at least partly in a ground soil region to guide the light and a photo detector for detecting scattered light returning from the optical fibre in dependence of time. The method includes obtaining information from which a temporal change of an acoustic transfer characteristic of the ground soil region is derivable and calibrating a distributed acoustic sensing system based on the changed acoustic transfer characteristic.