OSCILLATORY VISCOMETER Russian patent published in 2008 - IPC G01N11/16 

FIELD: physics; engineering procedures.

SUBSTANCE: oscillatory viscometer contains mechanical vibrator with test body and three electromechanical converters. One of electromechanical converters is motion signal source and through rectifier is connected to one of inputs of comparator on other input of which reference voltage comes. The output of the comparator is connected with driving input of controlled amplifier main input of which is connected to limiting amplifier, and the output - to the second converting generator of mechanical force. The input of the limiting amplifier is connected to the converting motion signal source. To the second input of the comparator through the additional rectifier one more electromechanical converter mounted on vibrator and connected to the limiting amplifier is attached, on signal of which reference voltage is formed.

EFFECT: expansion of measurement possibilities due to elimination of motion amplitude dependent signal invariable component.

3 dwg