A single laser all fibre based optical sensor and switching system and method for measuring velocity in atmospheric air flow

Ebba Dellwik (Inventor), Jakob Mann (Inventor), Leif Kristensen (Inventor), Torben Mikkelsen (Inventor)

    Research output: Patent

    228 Downloads (Pure)

    Abstract

    A system for measuring a velocity of tracer
    particle motion in a fluid comprising at least one laser emitter
    configured to emit a continuous wave laser beam and a plur
    ality of optical devices being configured to alternately receive
    a laser beam, focusing the laser beam onto a same probe
    volume comprising tracer particles, and receiving backscattered
    light from the tracer particles. The optical devices
    have a common optical input/output port for transmitting the
    received continuous-wave laser beam and for receiving the
    backscattered radiation. The optical devices are provided to
    have mutual pointing angles so that each of the plurality of
    optical devices points at the probe volume under a different
    angle. A processor is configured to receive a part of the trans -
    mitted laser beam and the received backscattered radiation
    beam to calculate a Doppler shift, and thereby determine a
    plurality of velocity components of the tracer particles using
    coherent detection.
    Original languageEnglish
    IPCG01P5/26
    Patent numberWO2013092746
    Filing date27/06/2013
    Country/TerritoryInternational Bureau of the World Intellectual Property Organization (WIPO)
    Publication statusPublished - 2013

    Bibliographical note

    DTU reference no: 92641

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