STRAIN SENSOR FOR VOLUME-WEIGHT METER OF LIQUID DENSITY AND VOLUME-WEIGHT MEASUREMENT OF DENSITY OF LIQUID ON ITS BASIS

摘要

The invention relates to control and measuring technology, and specifically to strain-measuring volume-weight meters of liquid density. The general principle of the measurement is based on a dependence of the weight of a fixed-volume pipeline section filled with liquid on the density of said liquid. The volume-weight meter of liquid density comprises a flow-sensitive pipe, a measuring unit and a strain gauge comprising at least one frame having an input flange and an output flange with through openings, at least one cylindrical bellows, longitudinal bars which are sensitive to deformation and are rigidly connected to the flange mentioned, and first and second strain-measuring transducers. The second strain-measuring transducers are arranged in such a manner that there is greatest sensitivity in dependence on the displacement of the output flange of the strain gauge and the direction of action of a force in a plane perpendicular to the axis passing through the centre of the input and output openings of the bellows, and there is least sensitivity in the event of an action of a force, the direction of which is perpendicular to the above-mentioned force. The technical result is an increase in the measuring accuracy.