Abstract: A combined driver and pick-off sensor component (200, 300) for a vibrating meter is provided. The combined driver and pick-off sensor component (200, 300) includes a magnet portion (104B) with at least a first magnet (211). The combined driver and pick-off sensor component (200, 300) further includes a coil portion (204A, 304A) receiving at least a portion of the first magnet (211). The coil portion (204A, 304A) includes a coil bobbin (220), a driver wire (221) wound around the coil bobbin (220), and a pick-off wire (222) wound around the coil bobbin (220).

Abstract: A combined driver and pick-off sensor component (200, 300) for a vibrating meter is provided. The combined driver and pick-off sensor component (200, 300) includes a magnet portion (104B) with at least a first magnet (211). The combined driver and pick-off sensor component (200, 300) further includes a coil portion (204A, 304A) receiving at least a portion of the first magnet (211). The coil portion (204A, 304A) includes a coil bobbin (220), a driver wire (221) wound around the coil bobbin (220), and a pick-off wire (222) wound around the coil bobbin (220).

Abstract: A dual pick-off vibratory flowmeter (100) is provided according to the invention. The dual pick-off vibratory flowmeter (100) includes a first flowtube (102A) and a second flowtube (102B), with the first and second flowtubes (102A, 102B) configured to be vibrated substantially in opposition. The vibratory flowmeter (100) further includes a first pick-off sensor (108) including first and second pick-off portions (108A, 108B) affixed to the first and second flowtubes (102A, 102B), with the first pick-off sensor (108) being located at a first longitudinal location X along the first and second flowtubes (102A, 102B). The vibratory flowmeter (100) further includes a second pick-off sensor (109) including first and second pick-off portions (109A, 109B) affixed to the first and second flowtubes (102A, 102B), with the second pick-off sensor (109) being located substantially at the first longitudinal location X and substantially spaced-apart from the first pick-off sensor (108).

Abstract: A magnet assembly (200) is provided according to the invention. The magnet assembly (200) includes at least one magnet (210), a magnet keeper (220) including a substantially planar magnet receiving face (222) for receiving the at least one magnet (210), and brazing (230) that affixes the at least one magnet (210) to the magnet receiving face (222) of the magnet keeper (220).

Abstract: A method for operating a flow meter is provided. The flow meter includes a driver and pickoff sensors coupled to a flow tube. The driver is adapted to vibrate the flow tube in response to a drive signal. The method comprises setting a target pickoff voltage and measuring a flow meter temperature. The method further comprises generating a temperature compensated target pickoff voltage and controlling the drive signal to maintain a temperature compensated flow tube amplitude.

Abstract: A dual-driver vibratory flowmeter (100) is provided according to the invention. The dual-driver vibratory flowmeter (100) includes a first flowtube (102A) and a second flowtube (102B) positioned substantially adjacent to the first flowtube (102A). The first and second flowtubes (102A, 102B) include a longitudinal length L. The dual-driver vibratory flowmeter (100) further includes a first driver (121) comprising first and second driver portions (121A, 121B) and affixed to the first and second flowtubes (102A, 102B), with the first driver (121) being located at a third longitudinal location Y along the first and second flowtubes (102A, 102B) and a second driver (122) comprising first and second driver portions (122A, 122B) and affixed to the first and second flowtubes (102A, 102B), with the second driver (122) being located substantially at the third longitudinal location Y and substantially spaced-apart from the first driver (121).

Abstract: A method for operating a flow meter is provided. The flow meter includes a driver and pickoff sensors coupled to a flow tube. The driver is adapted to vibrate the flow tube in response to a drive signal. The method comprises setting a target pickoff voltage and measuring a flow meter temperature. The method further comprises generating a temperature compensated target pickoff voltage and controlling the drive signal to maintain a temperature compensated flow tube amplitude.

Abstract: A dual pick-off vibratory flowmeter (100) is provided according to the invention. The dual pick-off vibratory flowmeter (100) includes a first flowtube (102A) and a second flowtube (102B), with the first and second flowtubes (102A, 102B) configured to be vibrated substantially in opposition. The vibratory flowmeter (100) further includes a first pick-off sensor (108) including first and second pick-off portions (108A, 108B) affixed to the first and second flowtubes (102A, 102B), with the first pick-off sensor (108) being located at a first longitudinal location X along the first and second flowtubes (102A, 102B). The vibratory flowmeter (100) further includes a second pick-off sensor (109) including first and second pick-off portions (109A, 109B) affixed to the first and second flowtubes (102A, 102B), with the second pick-off sensor (109) being located substantially at the first longitudinal location X and substantially spaced-apart from the first pick-off sensor (108).

Abstract: A dual-driver vibratory flowmeter (100) is provided according to the invention. The dual-driver vibratory flowmeter (100) includes a first flowtube (102A) and a second flowtube (102B) positioned substantially adjacent to the first flowtube (102A). The first and second flowtubes (102A, 102B) include a longitudinal length L. The dual-driver vibratory flowmeter (100) further includes a first driver (121) comprising first and second driver portions (121A, 121B) and affixed to the first and second flowtubes (102A, 102B), with the first driver (121) being located at a third longitudinal location Y along the first and second flowtubes (102A, 102B) and a second driver (122) comprising first and second driver portions (122A, 122B) and affixed to the first and second flowtubes (102A, 102B), with the second driver (122) being located substantially at the third longitudinal location Y and substantially spaced-apart from the first driver (121).

Abstract: A Coriolis flow meter comprising a pair of flow tubes (301, 302), a drive system (D) comprising a coil component (L) and a magnet component (M) that are sized and located such that the momentum of the coil component is equal and opposite to the momentum of the magnet component.

Abstract: A Coriolis flow meter comprising a pair of flow tubes (301, 302), a drive system (D) comprising a coil component (L) and a magnet component (M) that are sized and located such that the momentum of the coil component is equal and opposite to the momentum of the magnet component.

Abstract: A magnet assembly (200) is provided according to the invention. The magnet assembly (200) includes at least one magnet (210), a magnet keeper (220) including a substantially planar magnet receiving face (222) for receiving the at least one magnet (210), and brazing (230) that affixes the at least one magnet (210) to the magnet receiving face (222) of the magnet keeper (220).

Abstract: A Coriolis mass flowmeter (300) having a low mass drive system comprising a driver coil (D) for vibrating flow tube means (102). The Coriolis mass flowmeter does not use a magnet affixed to the flow tube means. Instead, the flow tube means is coated with or is integral to magnetic material (103) that responds to the magnetic fields generated by the driver coil to vibrate the flow tube means. The flow tube means may comprise one (102) or more (1402C1, 1402C2) flow tubes. The magnetic material may be ferrous material devoid of an internal magnetic field. Alternatively the magnetic material may be steel or stainless steel having internal magnetic fields.

Abstract: The present invention relates to a linear actuator that maximizes the flux density in the air gap where work is to be done by increasing the lines of flux that are captured while keeping the cost of production and mass relatively low. This is achieved by an improved linear actuator, which is characterized by a keeper comprised of a cross-shaped piece of ferromagnetic material bent such that the four ends of the cross are located perpendicular to the longitudinal axis of the magnet.

Abstract: The present invention relates to a linear actuator that maximizes the flux density in the air gap where work is to be done by increasing the lines of flux that are captured while keeping the cost of production and mass relatively low. This is achieved by an improved linear actuator, which is characterized by a keeper comprised of a cross-shaped piece of ferromagnetic material bent such that the four ends of the cross are located perpendicular to the longitudinal axis of the magnet.

Abstract: Apparatus for and a method of operating a mass flowmeter having a first embodiment that uses gyroscopic forces to determine material flow information for a material flow. The interior of the flow tube defines a helix element that imparts a rotation to the material flow within the flow tube. Driver induced transverse flow tube vibrations and the rotation imparted to the material flow together generate cyclic gyroscopic forces within the flow tube. The magnitude of the flow tube deflection from the gyroscopic forces is related to the magnitude of the material flow and is measured to determine material flow information. A second embodiment of the flowmeter detect the Coriolis forces on the vibrating flow tube and generates material flow information from the detected Coriolis forces. The Coriolis based flow information and the gyroscopic based flow information are both applied to meter electronics which uses the two sets of Information for comparison and error checking and other purposes.

Abstract: A bypass flowmeter for measuring the material flow in a conduit. An optimum pressure drop is developed across the flowmeter by coupling the material outlet of the flowmeter to the throat of a venturi positioned within the conduit. This increased pressure drop improves the material flow rate through the flowmeter. This enhances flowmeter accuracy and sensitivity and the flowmeter's ability to measure mass flow rates for low density materials such as gas. The ratio of the material flow within the flowmeter to that of the conduit is derived with improved precision over prior arrangements which assume a constant ratio of material flow between the flowmeter and the conduit. The material flow information for the conduit is obtained for materials having a varying viscosity by the use of a differential pressure sensor which measures the pressure drop across the flowmeter and transmits this information to instrumentation which uses it to derive material flow information for the conduit with improved precision.

Abstract: A flowmeter positioned inside a case having compliant membranes for case ends. The membranes have an axial compliance sufficient to allow the flow tube to expand/contract freely in response to thermal changes without a permanent deformation of the flow tube.

Abstract: A Coriolis flowmeter having an outer rotor positioned within a housing and having a recess coaxial with a center axis of rotation. A Coriolis rotor is positioned in the recess of the outer rotor and has a center of rotation coaxial with the center axis of rotation. The Coriolis rotor has a plurality of holes, each of which extends from the outer periphery of said Coriolis rotor to a center recess of said Coriolis rotor. The outer rotor has a plurality of holes, each of which extends from the outer periphery of the outer rotor to the recess of said outer rotor with at least some of said holes in said outer rotor being aligned with a corresponding one of said plurality of said holes in said Coriolis rotor. A fluid inlet extends fluid through holes of both the outer rotor and the Coriolis rotor to a fluid outlet of the flowmeter. Both rotors rotate about the center axis of rotation when fluid is received and passes through the holes of the rotors.

Abstract: A Coriolis flowmeter having a rotor assembly positioned within a housing and having center axis of rotation. The rotor assembly has a plurality of flow channels, each of which extends from the outer periphery of said rotor assembly to a center recess of said rotor assembly. An inlet extends material through the flow channels to an outlet of the flowmeter. The rotor assembly rotates about the center axis of rotation as the material passes through the flow channels. Coriolis forces generated by the material flowing and the concurrent rotation of the rotor assembly cause a flexure element comprising a part of the rotor assembly to assume an arcuate offset. Strain gauges or sensing coils and magnets generate output signals indicative of the magnitude of the angular offset and the mass flow rate of the flowing material. A motor connected to the rotor assembly can rotate the rotor assembly at an increased velocity to operate the flowmeter as a pump that generates output signals indicative of the pump throughput.