# US 2021/0333136 A1 · Systems and methods for fluid flow measurement > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0333136 A1 - Document ID: US20210333136A1 - Status: Published application - Kind: A1 - Application number: 16/855,147 - Filed: 2020-04-22 - Published: 2021-10-28 - Earliest claimed: 2020-04-22 - Assignees: Saudi Arabian Oil Company - Applicants: Saudi Arabian Oil Company - Inventors: Sakethraman Mahalingam; Muhammad Arsalan - Web page: https://patentgrep.com/patent/US20210333136A1 ## CPC - G01F 1/84: Coriolis or gyroscopic mass flowmeters - G01F 1/584: {constructions of electrodes, accessories therefor} - G01F 1/586: {constructions of coils, magnetic circuits, accessories therefor (G01F1/582 takes precedence; magnet; inductances; transformers; selection of materials for their magnetic properties per se H01F)} - G01F 1/60: Circuits therefor - G01F 1/64: by measuring electrical currents passing through the fluid flow; measuring electrical potential generated by the fluid flow, e.g. by electrochemical, contact or friction effects (G01F1/58 takes precedence) - G01N 9/002: {using variation of the resonant frequency of an element vibrating in contact with the material submitted to analysis (G01N9/34 takes precedence)} - G01N 11/16: by measuring damping effect upon oscillatory body - G01N 2009/006: {vibrating tube, tuning fork} - G01F: MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME - G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q) ## Abstract An example system is configured for determining properties of a fluid in a conduit. The system includes a mass flow meter including a hollow conduit having an inlet, an outlet, and a wall. The conduit is for conducting the fluid. The system includes a driver coupled to the conduit. The driver is configured for inducing an oscillation in the conduit. The system includes two or more accelerometers coupled to the conduit. The two or more accelerometers are configured for measuring displacement of the conduit. The system includes an electrical permittivity sensor coupled to the conduit. The electrical permittivity sensor is configured for measuring electrical permittivity of the fluid. ## Claims ### Claim 1 A system for determining properties of a fluid in a conduit, the system comprising: a mass flow meter comprising a hollow conduit having an inlet, an outlet, and a wall, the conduit for conducting the fluid, a driver coupled to the conduit for inducing an oscillation in the conduit, and two or more accelerometers coupled to the conduit to measure displacement of the conduit; and an electrical permittivity sensor coupled to the conduit to measure electrical permittivity of the fluid. ### Claim 2 (depends on 1) The system of claim 1, where the conduit is made of an electrically non-conductive material. ### Claim 3 (depends on 1) The system of claim 1, where the conduit comprises material with a density of between 1,000 and 2,000 kg/m3. ### Claim 4 (depends on 1) The system of claim 1, where the electrical permittivity sensor comprises two or more sensor patches embedded within the wall of the hollow conduit. ### Claim 5 (depends on 1) The system of claim 1, where the electrical permittivity sensor comprises two or more sensor patches disposed on an outer wall of the hollow conduit. ### Claim 6 (depends on 1) The system of claim 1, where the electrical permittivity sensor comprises two or more sensor patches disposed on an inner wall of the hollow conduit. ### Claim 7 (depends on 1) The system of claim 1, where the electrical permittivity sensor comprises a sensor patch on the hollow conduit and a sensor patch mounted on a mount at a distance from the conduit. ### Claim 8 (depends on 1) The system of claim 1, where the electrical permittivity sensor comprises two sensor patches disposed on the hollow conduit, the two sensor patches arranged on diametrically opposing surfaces along a circumference of the hollow conduit. ### Claim 9 (depends on 1) The system of claim 1, where the conduit comprises two tubes arranged in parallel along a length of the conduit. ### Claim 10 (depends on 1) The system of claim 1, comprising a differential pressure sensor mounted on the conduit adjacent to the inlet and a differential pressure sensor mounted on the conduit adjacent to the outlet. ### Claim 11 A method for determining properties of a fluid in a conduit, the method comprising: flowing the fluid through a mass flow meter comprising a hollow conduit having an inlet, an outlet, and a wall, the conduit for conducting the fluid, inducing, by a driver coupled to the conduit, an oscillation in the conduit, measuring, by two or more accelerometers coupled to the conduit, displacement of the conduit; measuring, by an electrical permittivity sensor coupled to the conduit, electrical permittivity of the fluid. receiving, by a processor, sensor data from the sensor; and determining, by the processor, from the sensor data, a property of the fluid. ### Claim 12 (depends on 11) The method of claim 11, where the conduit is made of an electrically non-conductive material. ### Claim 13 (depends on 11) The method of claim 11, where the conduit comprises material with a density of between 1,000 and 2,000 kg/m3. ### Claim 14 (depends on 11) The method of claim 11, where the electrical permittivity sensor comprises two or more sensor patches embedded within the wall of the hollow conduit. ### Claim 15 (depends on 11) The method of claim 11, where the electrical permittivity sensor comprises two or more sensor patches disposed on an outer wall of the hollow conduit. ### Claim 16 (depends on 11) The method of claim 11, where the electrical permittivity sensor comprises two or more sensor patches disposed on an inner wall of the hollow conduit. ### Claim 17 (depends on 11) The method of claim 11, where the electrical permittivity sensor comprises a sensor patch on the hollow conduit and a sensor patch mounted on a mount at a distance from the conduit. ### Claim 18 (depends on 11) The method of claim 11, where the electrical permittivity sensor comprises two sensor patches disposed on the hollow conduit, the two sensor patches arranged on diametrically opposing surfaces along a circumference of the hollow conduit. ### Claim 19 (depends on 11) The method of claim 11, where the conduit comprises two tubes arranged in parallel along a length of the conduit. ### Claim 20 (depends on 11) The method of claim 11, comprising measuring, by a differential pressure sensor mounted on the conduit adjacent to the inlet and a differential pressure sensor mounted on the conduit adjacent to the outlet, a differential pressure in the fluid.