VORTEX MEASURING DEVICE Russian patent published in 2007 - IPC G01N27/90 

FIELD: measuring technique.

SUBSTANCE: device comprises converter composed of measuring and compensating inductive coils connected in series, symmetrical multi-vibrator, frequency divider, power amplifier whose output is connected with vortex converter, signal amplifier, test and signal synchronous detectors, pulse generator, low-frequency filter, and electronic switch. The control input of the test synchronous detector is connected with the output of the frequency divider. The signal input of the test synchronous detector is connecter with the input of the low-frequency filter. The pulse generator is provided with four inputs. Two inputs are connected with two antiphase outputs of the symmetrical multi-vibrator, and two other inputs are connected with the antiphase outputs of the frequency divider. The signal amplifier is made of instrumental amplifier. The signal circuit of the electronic switch is connected in series with the resistor between the common bus and combined output of the vortex converter and signal input of the signal synchronous detector. The signal output of the detector is connected with the signal output of the vortex measuring device through the signal amplifier and low-frequency filter connected in series. The control input of the electronic switch is connected with the output of the pulse generator.

EFFECT: enhanced accuracy of measurements.

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