ELECTROMAGNET LOG-DRIFT SIGHT Russian patent published in 2013 - IPC G01P5/08 

FIELD: instrument making.

SUBSTANCE: electromagnetic log-drift metre comprises a butterfly valve, in which a speed sensor is placed, made as capable of rotation relative to the axis of the butterfly valve, stretching via the plane of the sensor symmetry, on the sensor there is a radiator of electromagnetic field, and also two side electrodes relative to the direction of axial line of the vessel, and one control electrode in the front part of the sensor, side electrodes are connected to the inlets of the primary speed converter, the outlet of which is connected to a central instrument, the control electrode is connected in pairs with two side electrodes via a unit of comparison and control connected with a synchronous tracking drive, at the same time the lag drift sight additionally comprises a sensor of angular speeds, to the outlet of which a unit of circulation radius is connected, at the same time all specified instruments are connected to the source of power supply.

EFFECT: expanded assortment of navigation devices.

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