MEASURING DEVICE OF LIQUEFIED GAS IN CLOSED TANK Russian patent published in 2011 - IPC G01F23/00 

FIELD: electricity.

SUBSTANCE: device includes resonator made in the form of continuous slot line on the wall of metal tube, and each of ends of that line is connected to shorted end of coaxial cable. Besides, devices includes frequency synthesiser the output of which is connected via three channels through the appropriate filters to inputs of selector controlled with signal from microprocessor. The above type of resonator allows inducing electromagnetic oscillations in it at three resonant frequencies with required relations of themselves and parameters of filling of resonator with liquefied gas. In synthesiser-filter-selector group the electromagnetic oscillations are subsequently shaped in the range of frequencies corresponding to changes in three free frequencies of resonator. Measuring algorithms of resonant frequencies and their conversion are implemented in microprocessor in order to determine liquefied gas weight.

EFFECT: simpler and higher accuracy of measuring system of liquefied gas weight in closed tank.

3 dwg