FIELD: measuring equipment.
SUBSTANCE: invention relates to measurement equipment and can be used for ascertaining liquid density. In the method and measurement system according to the invention, vibration body (10) contacted by a fluid (FL) can vibrate in such a manner as to at least proportionally perform mechanical vibrations (resonance vibrations) at a resonance frequency depending on the density of the fluid contacting first surface (10+) of the vibration body and on the temperature of the vibration body. Vibrations of the vibration body are detected by means of a vibration sensor (51) in order to generate at least one vibration measurement signal having at least one signal component that has a signal frequency corresponding to the resonance frequency dependent on the density of the fluid. In addition, a temperature sensor (61) is used to generate a temperature measurement signal representing a time curve of a variable vibration body temperature. Temperature measurement signal determined by the thermal conductance and a heat capacity of the vibration body can follow a change in the vibration body temperature from an initial temperature value Θ10,t1 to a temperature value Θ10,t2 only with a time delay. Density measurement values representing the density are generated on the basis of the vibration measurement signal and the temperature measurement signal, any discrepancies between the time curve of the vibration body temperature and the temperature measurement signal occurring in the process are taken into account or at least partially compensated.
EFFECT: technical result is improved accuracy of obtained data.
13 cl, 8 dwg
