JET AUTO-GENERATOR FLOW METRE-COUNTER Russian patent published in 2011 - IPC G01F1/20 

FIELD: machine building.

SUBSTANCE: flow metre-counter consists of jet auto-generator (1) with channels of feedback. On the channels there are installed sensors (2, 3) of pressure pulsation, a differential amplifier (4), a summing amplifier (5), analogue-digital converters (6, 7), computing devices of amplitude-frequency spectres (8, 9), a device of spectres subtraction (10), and a device for search of maximum in spectre. Frequency output of device (11) is connected to input of key (12), amplitude output of device (11) is connected to first input of comparator (13), while source of reference signal (14) is connected to the second input of the comparator. The output of the comparator is connected to a key control input. Units (6-14) are controlled with control and program means of the micro-controller.

EFFECT: high interference protection due to minimal influence of interference signals caused with pressure pulsations in pipeline; increased reliability of measurement owing to processing signals of sensors with program facilities.

2 dwg