Sensor mounting for coriolis mass flow rate meter
First Claim
1. An apparatus for measuring the mass flow rate of a fluid having two flow conduits, each mounted for oscillation about an axis, of a length of each of said flow conduits through which the fluid to be measured is flowed, comprising:
- (A) a first sensor means for detecting Coriolis force induced distortions of said flow conduits, said first sensor means having at least two sensor means components, said first sensor means components having essentially equal masses;
(B) a second sensor means for detecting Coriolis force induced distortions of said flow conduits, said second sensor means having at least two sensor means components, said second sensor means components having essentially equal masses;
(C) a first beam to which are attached at opposite ends a first sensor means component and a second sensor means component;
(D) a second beam, said beam having a mass essentially equal to that of said first beam, to which are attached at opposite ends of said second beam a first sensor means component and a second sensor means component;
(E) means for attaching said first beam to a first flow conduit so that the locations where said first beam is attached to said first flow conduit are at essentially equal first distances from the axis about which said first flow conduit is oscillated, and for attaching said first beam to said first flow conduit so that the center of gravity of said first beam in combination with said first and second sensor means components is essentially positioned on the axis about which generated Coriolis forces act; and
(F) means for attaching said second beam to a second flow conduit so that the locations where said second beam is attached to said second flow conduit are at essentially equal second distances from the axis about which said second flow conduit is oscillated, said first distances and said second distances being essentially equal, and for attaching said second beam to said second flow conduit so that the center of gravity of said second beam in combination with said first and second sensor means components is essentially positioned on the axis about which generated Coriolis forces act.
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Abstract
A Coriolis mass flow meter apparatus for determining the mass flow rates of fluids passed through twin flow tubes which are oscillated by a driver in a tuning fork fashion so as to be distorted by the mass flow rate of the fluid passing through the tubes with the distortion measured by sensors; where, sensor and driver components are mounted to each of the flow tubes so that the masses of the components and the structures used to mount the components to the flow tubes results in a center of gravity which is located on the axes about which each flow tube is distorted by generated Coriolis forces.
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Citations
7 Claims
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1. An apparatus for measuring the mass flow rate of a fluid having two flow conduits, each mounted for oscillation about an axis, of a length of each of said flow conduits through which the fluid to be measured is flowed, comprising:
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(A) a first sensor means for detecting Coriolis force induced distortions of said flow conduits, said first sensor means having at least two sensor means components, said first sensor means components having essentially equal masses; (B) a second sensor means for detecting Coriolis force induced distortions of said flow conduits, said second sensor means having at least two sensor means components, said second sensor means components having essentially equal masses; (C) a first beam to which are attached at opposite ends a first sensor means component and a second sensor means component; (D) a second beam, said beam having a mass essentially equal to that of said first beam, to which are attached at opposite ends of said second beam a first sensor means component and a second sensor means component; (E) means for attaching said first beam to a first flow conduit so that the locations where said first beam is attached to said first flow conduit are at essentially equal first distances from the axis about which said first flow conduit is oscillated, and for attaching said first beam to said first flow conduit so that the center of gravity of said first beam in combination with said first and second sensor means components is essentially positioned on the axis about which generated Coriolis forces act; and (F) means for attaching said second beam to a second flow conduit so that the locations where said second beam is attached to said second flow conduit are at essentially equal second distances from the axis about which said second flow conduit is oscillated, said first distances and said second distances being essentially equal, and for attaching said second beam to said second flow conduit so that the center of gravity of said second beam in combination with said first and second sensor means components is essentially positioned on the axis about which generated Coriolis forces act. - View Dependent Claims (2, 3, 4, 5, 6)
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7. In a method for constructing an apparatus for measuring the mass flow rate of a fluid comprising (1) two sensor systems each consisting essentially of two sensor components for detecting Coriolis forces and (2) two flow conduits, mounted to permit a length thereof to oscillate (a) about an axis for said flow conduit and (b) as one tine of a tuning fork in cooperation with the other flow conduit, the improvement which comprises
mounting one of the two sensor components from both sensor systems on each of two beam structures and attaching one of the resulting beam structures with two sensor components mounted thereon to each of said flow conduits in a manner such that the aggregate center of gravity of each beam structure with mounted sensor components thereon lies (i) at an equal distance from the axis about which a length of the attached conduit oscillates and (ii) essentially on the axis of the attached flow conduit about which generated Coriolis forces act when fluid is flowing through the conduit.
Specification