Determining fluid density

摘要

The density of a fluid is determined using a vibratory resonant densitometer in an environment. The densitometer includes a tubular sample cavity and other densitometer parts. The method includes measuring a plurality of parameters characterizing the environment. The method further includes adjusting a model of the sample cavity using the measured parameters. The method further includes receiving a sample fluid into the sample cavity. The method further includes vibrating the sample cavity to obtain a vibration signal. The method further includes calculating the density of the sample fluid using the model and the vibration signal.

主权项

1. A method for determining the density of a fluid using a vibratory resonant densitometer in an environment, the densitometer including a sample cavity and other densitometer parts, the method comprising:
measuring, at a time the density of the fluid is to be determined, a plurality of parameters characterizing the environment, the plurality of parameters comprising the temperature of the sample cavity; adjusting, at the time the density of the fluid is to be determined, a model of the sample cavity using the measured parameters, the model including the temperature dependent Young's modulus of a material used to make the sample cavity, and adjusting the model of the sample cavity comprising calculating the temperature dependent Young's modulus of the material used to make the sample cavity using the measured temperature of the sample cavity; receiving a sample of the fluid into the sample cavity; vibrating the sample cavity to obtain a vibration signal; and calculating the density of the sample fluid using the model and the vibration signal.