FLOW RATE METRE Russian patent published in 2009 - IPC G01F1/20 G01F1/34 G01N9/22 

FIELD: instrument making.

SUBSTANCE: proposed metre comprises the casing made up of two parts 1,6, delivery nozzle 2, nozzle 3 to deliver measured medium into casing inlet hole 5 and outlet branch pipe 30. Casing chambers 9 and 10, separated by shutter 7 and membrane 8, are filled with measured and tested media (the latter representing fluid with known density, i.e. water, spirit, ether). Membranes 11, 12 with positive floatability bodies 22 and 23 fastened thereon, separate appropriate chambers into above-membrane spaces 13, 14 and below-membrane spaces 15 and 16. Casing channels 19, 20, communicating below-membrane spaces and space 4 between the nozzles, accommodate sealing elements 28, 29 representing pistons rigidly fixed on previously mentioned positive-floatability bodies. Channels 19, 20 are integrated with two differential-transformer membrane displacement convertors 24, 25 connected with analog-digital 31, in its turn, connected with single-chip microcontroller 32. Magnetoconducting solid body or nonwettable magnetic fluid makes the core of convertors 24, 25.

EFFECT: higher accuracy and expanded performances.

3 cl, 4 dwg