Enhanced supercritical fluid measurement with vibratory sensors
AssigneeMicro Motion, Inc.
InventorsAndrew Timothy Patten, Anthony William Pankratz
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Abstract
A method for inferring an inferred speed of sound of a flow fluid is disclosed. The method is conducted by a computer system (200) having a processor (210) and a memory (220), the processor (210) configured to execute instructions from the memory (220) and store data in the memory (220), the memory (220) having a SoS inference module (202). The method includes inferring, by the SoS inference module (202), the inferred speed of sound of the flow fluid based on an inferential relationship between a measured density of the flow fluid and the inferred speed of sound of the flow fluid.
Claims20
A method for inferring an inferred speed of sound of a flow fluid, the method being conducted by a computer system (200) having a processor (210) and a memory (220), the processor (210) configured to execute instructions from the memory (220) and store data in the memory (220), the memory (220) having a SoS inference module (202), the method comprising:
- providing a vibratory flow sensor (5) fluidly coupled to a conduit (160) through which the flow fluid flows and configured to determine a flow measurement of the flow fluid;
- providing a density sensor (10) fluidly coupled to the conduit, the density sensor being substantially immune from speed of sound effects of the flow fluid, and having at least one of:
- 1) a smaller diameter than the vibratory flow sensor, 2) a lower vibrating frequency than the vibratory flow sensor, and 3) a predetermined distance threshold with respect to the vibratory flow sensor;
- measuring, by the density sensor, the density of the flow fluid;
- inferring, by the SoS inference module (202), the inferred speed of sound of the flow fluid based on an inferential relationship between a measured density and a heat capacity ratio of the flow fluid and the inferred speed of sound of the flow fluid;
- and
- transmitting, by the density sensor, the inferred speed of sound of the fluid to the vibratory flow sensor in order to correct the flow measurement and improve accuracy in the vibratory flow sensor.
A system for inferring an inferred speed of sound of a flow fluid, the system comprising:
- a vibratory flow sensor (5) fluidly coupled to a conduit (160) through which the flow fluid flows and configured to determine a flow measurement of the flow fluid;
- a density sensor (10) fluidly coupled to the conduit, the density sensor being substantially immune from speed of sound effects of the flow fluid, and having at least one of:
- 1) a smaller diameter than the vibratory flow sensor, 2) a lower vibrating frequency than the vibratory flow sensor, and 3) a predetermined distance threshold with respect to the vibratory flow sensor;
- and
- a computer system (200) having a processor (210) and a memory (220), the processor (210) configured to execute instructions from the memory (220) and store data in the memory (220), the memory (220) having a SoS inference module (202), the computer system (200) configured to:
- measure, by the density sensor, the density of the flow fluid;
- infer, by the SoS inference module (202), the inferred speed of sound of the flow fluid based on an inferential relationship between a measured density and heat capacity ratio of the flow fluid and the inferred speed of sound of the flow fluid;
- and
- transmit, by the density sensor, the inferred speed of sound of the fluid to the vibratory flow sensor in order to correct the flow measurement and improve accuracy in the vibratory flow sensor.
Dependencies are inferred from the claim text.