초록 ▼

A method of measuring the flow rate of a fluid through a conduit by means of a sonic flow meter employing the steps of measuring the speed of sound transmission through the fluid from an upstream point in the conduit to an opposed downstream point, measuring the speed of sound transmission through t

A method of measuring the flow rate of a fluid through a conduit by means of a sonic flow meter employing the steps of measuring the speed of sound transmission through the fluid from an upstream point in the conduit to an opposed downstream point, measuring the speed of sound transmission through the fluid from the downstream point to the upstream point, subtracting the two measurements to obtain a liquid flow rate indication, adding the two measurements to obtain the fluid sound velocity, measuring the temperature of the fluid in the conduit, determining a measurement of the fluid viscosity from the fluid speed of sound transmission and the temperature, and correcting the determined fluid velocity utilizing the detected fluid viscosity.

대표청구항 ▼

A method of measuring the flow rate of a fluid through a conduit comprising: (a) measuring the speed of sound transmission through the fluid from an upstream point in the conduit to an opposed downstream point; (b) measuring the speed of sound transmission through the fluid from said downstream poin

A method of measuring the flow rate of a fluid through a conduit comprising: (a) measuring the speed of sound transmission through the fluid from an upstream point in the conduit to an opposed downstream point; (b) measuring the speed of sound transmission through the fluid from said downstream point to said upstream point; (c) subtracting the measurement of step (b) from the measurement of step (a) to determine the fluid flow rate; (d) adding the measurement of step (a) to the measurement of step (b) to determine the fluid sound velocity; (e) measuring the temperature of the fluid in the conduit; (f) determining a fluid viscosity factor from the measured fluid sound velocity and temperature; and (g) correcting the fluid flow rate by the fluid viscosity factor to obtain a corrected fluid flow rate. A method of determining the viscosity of a fluid comprising: (a) measuring the speed of sound transmission of the fluid; (b) measuring the temperature of the fluid; and (c) calculating the fluid viscosity by employing an empirical formula in which the variables are the fluid speed of sound transmission derived from step (a) and the fluid temperature derived from step (b).