| 摘要 |
In the method and measurement system according to the invention, a 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 a 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, i.e. dependent on the density of the fluid. In addition, a temperature sensor (61) which is thermally coupled to a second vibration body surface (10#) not contacting the fluid is used to generate a temperature measurement signal representing a time curve of a variable vibration body temperature. Due, inter alia, to a thermal conductance and a heat capacity of the vibration body, the temperature measurement signal can follow a change in the vibration body temperature from an initial temperature value T10, t1 to a temperature value T10,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. |
