METHOD OF MEASURING PRESSURE AND/OR MOLAR MASS OF GAS INSIDE ENCLOSURE AND MEASURING DEVICE Russian patent published in 2012 - IPC G01N29/00 

FIELD: physics.

SUBSTANCE: measurements are taken using an acoustic sensor having at least one transducer (5), an electrical system (8) connected to the transducer (5), and a connecting layer (6) for connecting the transducer (5) to an enclosure (1), and the method involves the transducer (5) generating an exciting acoustic signal which causes vibration of the enclosure (1) and the gas (2) in a wide frequency range; detecting, by the transducer (5), a response acoustic signal characterising vibrations of the enclosure and the gas; analysing response electrical signals coming from the transducer (5) using the system (8) and determining, in particular, using resonance frequencies of the gas (2), the speed of propagation of acoustic waves in the gas, the molar mass of the gas and its pressure.

EFFECT: possibility of obtaining pressure values in a cylindrical enclosure filled with a gaseous mixture with high measurement accuracy, possibility of determining molar mass of said gaseous mixture with high measurement accuracy.

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