FIELD: physics.
SUBSTANCE: present invention relates to a non-invasive microwave measuring device (01) for calculating a liquid flow rate, wherein device (01) comprises: microwave device (03) for non-invasive measurement of liquid velocity, comprising a strip antenna or a horn antenna for generating microwave signal (14), which is transmitted at a certain angle α inclination towards liquid surface (16), and for receiving reflected microwave signal (15) from liquid surface (16) with Doppler frequency shift; drone (02), to which is suspended device (03) for measurement by means of suspension system (04), wherein said suspension system (04) eliminates vibration noise produced by drone (02); at least one vibration sensor for eliminating false speed readings; at least one angle sensor for introduction of correction for pitch, roll and yaw from drone (02), which affect measurement of surface velocity of liquid. Present solution also relates to a method for measuring flow velocity using a microwave device for non-invasive measurement of liquid velocity.
EFFECT: providing an improved non-invasive method and device for measuring the flow rate of a river, an open channel or a liquid flowing in a pipe or channel, when for the latter operator access to the measurement point is difficult, impossible, or dangerous or it is simply necessary to avoid entering the complicated confined space.
14 cl, 15 dwg
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