Stable mode split fin sensor

Abstract

Embodiments of a fin sensor are disclosed. Embodiments of a fin sensor have a base coupled to a first fin and a second fin, the fin sensor further having at least two transducers coupled to the fins, the first fin coupled to the second fin by at least one fin coupler.

Description

TECHNICAL FIELD

[0001] The implementations described below relate to sensors, and more specifically, to flow sensors. BACKGROUND

[0002] Existing fin sensors have problems with mode separation. Typically, the frequency difference between the in-phase mode and the out-of-phase mode is minimal, which confuses the calculation of the flow characteristics. Also, when curl is generated in existing fin sensors, there is little amplitude contrast from which to derive the phase difference measurement of the flow characteristics.

[0003] In existing fin sensors, the measurements are confused by significant net movement from the center of the pipe in which they reside towards the sensor assembly. The reason for this is that the axis of rotation of the fins is controlled by the fin positioning on the plate and the location of the driver. The axis of rotation of the fins is typically around the edge of the base in which they reside. This creates an imbalance, which leads to errors and problems with calibration. The forces from the in-phase mode cause net motion at the process coupling. Also, it can be difficult or impossible to drive the tube and the balance bar to equal in-phase mode shapes. The resulting imbalance leads to calibration and measurement errors. These problems limit the effectiveness of fin sensors, making them impractical for many industrial applications.

[0004] Therefore, there is a need for improved fin sensors. SUMMARY

[0005] Implementations of a fin sensor (102) are disclosed. Implementations of the fin sensor (102) have a base (106) coupled to a first fin (108a) and a second fin (108b), the fin sensor (102) further having at least two transducers (104a and 104b) coupled to the fins (108a and 108b), the first fin (108a) coupled to the second fin (108b) by at least one fin coupler (120a and / or 120b).

[0006] Another implementation of a fin sensor (102) is disclosed. The other implementation of the fin sensor (102) has a base (106) and a balance rib (118), the base (106) coupled to a first fin (108a) and a second fin (108b), the fin sensor (102) further having at least two transducers (104a and 104b) coupled to the fins (108a and 108b), the balance rib (118) coupled to one or more of the base (106) and a base coupler (116).

[0007] Embodiments of a method of manufacturing a fin coupler assembly are disclosed. Embodiments of the method have a fin coupler assembly having at least one fin (108a and / or 108b) and at least one fin coupler (120a and / or 120b), the method comprising the step of forming the fin coupler assembly in which the at least one fin (108a and / or 108b) is coupled to the at least one fin coupler (120a and / or 120b).

[0008] Embodiments of a method of manufacturing a balance base assembly are disclosed. Embodiments of the method of manufacturing a balance base assembly comprise the steps of: forming a base (106); forming a balance rib (118); and coupling the balance rib (118) to one or more of the base (106) and a base coupler (116).

[0009] Embodiments of a method of using a fin sensor (102) are disclosed. Embodiments of the method of using a fin sensor (102) can have a fin sensor (102) having a drive transducer (104b) that drives vibrations in a first fin (108a) and a second fin (108b), the first fin (108a) and the second fin (108b) coupled to a base (106), the fin sensor (102) having at least one sense transducer (104a) that receives response data, the method having the step of at least partially restricting movement of the first fin (108a) relative to the movement of the second fin (108b) by at least one fin coupler (120a and / or 120b).

[0010] Embodiments of a method of using a fin sensor (102) are disclosed. Embodiments of the method of using a fin sensor (102) can have a fin sensor (102) having a drive transducer (104b) that drives vibrations in a first fin (108a) and a second fin (108b), the first fin (108a) and the second fin (108b) coupled to a base (106), the fin sensor (102) having at least one sense transducer (104a) that receives response data, the fin sensor (102) having a balance rib (118), the method having the step of at least partially restricting movement of the base (106) by the balance rib (118).

[0011] Aspects

[0012] According to an aspect, implementations of a fin sensor (102) are disclosed. Implementations of the fin sensor (102) have a base (106) coupled to a first fin (108a) and a second fin (108b), the fin sensor (102) further having at least two transducers (104a and 104b) coupled to the fins (108a and 108b), the first fin (108a) coupled to the second fin (108b) by at least one fin coupler (120a and / or 120b).

[0013] Preferably, the at least one fin coupler (120a and / or 120b) is a rod-shaped fin coupler (220c).

[0014] Preferably, the at least one fin coupler (120a and / or 120b) is a rod-shaped fin coupler (220c).

[0015] Preferably, the at least one fin coupler (120a and / or 120b) is a rod-shaped fin coupler (220c).

[0016] Preferably, the at least one fin coupler (120a and / or 120b) is a rod-shaped fin coupler (220c).

[0017] Preferably, the at least one fin coupler (120a and / or 120b) is a rod-shaped fin coupler (220c).

[0018] Preferably, the at least one fin coupler (120a and / or 120b) is a rod-shaped fin coupler (220c).

[0019] Preferably, the at least one fin coupler (120a and / or 120b) couples the fins (108a and 108b) at substantially the same location on the respective faces of the fins (108a and 108b).

[0020] Preferably, the fins are arranged to have the same placement site such that the at least one fin coupler (120a and / or 120b) is parallel to the cross axis (131) when the fins (108a and 108b) are placed in the same or substantially the same positioning in the plane defined by the flow axis (141) and the longitudinal axis (151).

[0021] Preferably, the at least one fin coupler (120a and / or 120b) is coupled to at least one of the fins (108a and / or 108b) at a different location on each of the fins (108a and 108b).

[0022] Preferably, the at least one fin coupler (120a and / or 120b) is coupled to at least one of the fins (108a and / or 108b) in a region or projected region of a face of at least one of the fins (108a and / or 108b) represented by a lowermost (155) and an upstreammost (143) quadrant portion of at least one of the fins (108a and / or 108b).

[0023] Preferably, the at least one fin coupler (120a and / or 120b) is coupled to at least one of the fins (108a and / or 108b) in a region or projected region of a face of at least one of the fins (108a and / or 108b) represented by a lowermost (155) and a downstreammost (145) quadrant portion of at least one of the fins (108a and / or 108b).

[0024] Preferably, the at least one fin coupler (120a and / or 120b) is coupled to at least one of the fins (108a and / or 108b) in a region or projected region of a face of at least one of the fins (108a and / or 108b) represented by a lowermost (155) and an upstreammost (143) corner of at least one of the fins (108a and / or 108b).

[0025] Preferably, the at least one fin coupler (120a and / or 120b) is coupled to at least one of the fins (108a and / or 108b) in a region or projected region of a face of at least one of the fins (108a and / or 108b) represented by a lowermost (155) and a downstreammost (145) corner of at least one of the fins (108a and / or 108b).

[0026] Preferably, the at least one fin coupler (120a and / or 120b) is coupled to at least one of the fins (108a and / or 108b) in a region or projected region of a face of at least one of the fins (108a and / or 108b) represented by a central one-ninth portion of at least one of the fins (108a and / or 108b).

[0027] Preferably, the at least one fin coupler (120a and / or 120b) is coupled to the at least one of the fins (108a and / or 108b) in a region of a face of the at least one of the fins (108a and / or 108b) represented by a region or projected region defined by a middle third and an upstream (143) third of a longitudinal axis (151) of the at least one of the fins (108a and / or 108b).

[0028] Preferably, the at least one fin coupler (120a and / or 120b) is coupled to the at least one of the fins (108a and / or 108b) in a region of a face of the at least one of the fins (108a and / or 108b) represented by a region or projected region defined by a middle third and a downstream (145) third of a longitudinal axis (151) of the at least one of the fins (108a and / or 108b).

[0029] Preferably, the at least one fin coupler (120a and / or 120b) is coupled to the at least one of the fins (108a and / or 108b) in a region of a face of the at least one of the fins (108a and / or 108b) represented by a region or projected region defined by an upper (153) third and an upstream (143) third of the at least one of the fins (108a and / or 108b).

[0030] Preferably, the at least one fin coupler (120a and / or 120b) is coupled to the at least one of the fins (108a and / or 108b) in a region of a face of the at least one of the fins (108a and / or 108b) represented by a region or projected region defined by an upper (153) third and a downstream (145) third of the at least one of the fins (108a and / or 108b).

[0031] Preferably, the at least one fin coupler (120a and / or 120b) is coupled to the at least one of the fins (108a and / or 108b) in a region of a face of the at least one of the fins (108a and / or 108b) represented by a region or projected region defined by a lower (155) third and an upstream (143) third of the at least one of the fins (108a and / or 108b).

[0032] Preferably, the at least one fin coupler (120a and / or 120b) is coupled to the at least one of the fins (108a and / or 108b) in a region of the at least one of the fins (108a and / or 108b) represented by a region or projected region of a face of the at least one of the fins (108a and / or 108b) defined by a lower (155) third and a downstream (145) third of the at least one of the fins (108a and / or 108b) on the longitudinal axis (151).

[0033] Preferably, the at least one fin coupler (120a and / or 120b) is coupled to the first fin (108a) and the second fin (108b) in a manner that increases an axial rigidity of an immersion element of the fin sensor (102).

[0034] Preferably, the fins (108a and 108b) have fin protrusions (114a and 114b) that protrude through holes in the base (106), the transducers (104a and 104b) being coupled to the fins (108a and 108b) at the fin protrusions (114a and 114b).

[0035] Preferably, the base (106) has an immersion side (342) and an outer side (344), the fin protrusions (114a and 114b) protruding through the base (106) to the outer side (344).

[0036] Preferably, the fin protrusions (114a and 114b) have corresponding segments, wherein the corresponding segments are segments that are at least partially aligned on the transverse axis (131).

[0037] Preferably, the transducers (104a and 104b) are each coupled to two corresponding segments.

[0038] Preferably, the at least one fin coupler (120a and / or 120b) is coupled to the fins (108a and 108b) on an outer side of the base (106).

[0039] Preferably, the at least one fin coupler (120a and / or 120b) is coupled to at least one of the fin protrusions (114a or 114b).

[0040] Preferably, the at least one fin coupler (120a and / or 120b) is coupled to a segment of at least one of the fin protrusions (114a or 114b).

[0041] Preferably, the at least one fin coupler (120a and / or 120b) is coupled to the fins (108a and 108b) below (155) a coupling between the fins (108a and 108b) and the at least two transducers (104a and 104b).

[0042] Preferably, the at least one fin coupler (120a and / or 120b) is coupled to the fins (108a and 108b) on the outer side (344) of the base (106) at a location closer to the base (106) than a location where the transducers (104a-c) are coupled to the fins (108a and / or 108b).

[0043] Preferably, the at least one fin coupler (120a and / or 120b) is coupled to the fins (108a and 108b) on the outer side (344) of the base (106) at a location closer to the base (106) than a location where the transducers (104a-c) are coupled to the fins (108a and / or 108b).

[0044] Preferably, the fin protrusions (114a and 114b) have corresponding segments, where the corresponding segments are segments that are at least partially aligned on the transverse axis (131).

[0045] Preferably, the transducers (104a and 104b) are each coupled to two corresponding segments.

[0046] Preferably, the at least one fin coupler (120a and / or 120b) includes a first fin coupler (120a) and a second fin coupler (120b), the first fin coupler (120a) being coupled to the fins (108a and 108b) at a location upstream of a location where the second fin coupler (120b) is coupled to the fins (108a and 108b).

[0047] Preferably, the sensing transducer (104a) is coupled to the fins (108a and 108b) upstream of a location where the driving transducer (104b) is coupled to the fins (108a and 108b).

[0048] Preferably, the base (106) is a variable base (306) having a variable stiffness.

[0049] Preferably, the variable base (306) has a softer portion in the middle of the variable base (306) and a stiffer portion at the edges of the variable base (306), the middle and edges being a middle and edges of the variable base (306) on the transverse axis (131).

[0050] Preferably, the variable base (306) is thinner in the middle than at the edges.

[0051] Preferably, the variable base (306) has a varying material composition along the transverse axis (131).

[0052] Preferably, the varying base (306) has softer material in the middle of the varying base (306) on the transverse axis (131) and harder material at the edges of the varying base (306).

[0053] Preferably, the fin sensor (102) further comprises a balancing rib (118) coupled to one or more of the base (106) and the base coupler (116), the balancing rib (118) configured to at least partially limit movement of the base (106) along a middle portion of the base (106) on the longitudinal axis (151), the middle portion of the base (106) being a portion defined by a middle of the transverse axis (131).

[0054] Preferably, the fin sensor (102) further comprises meter electronics (112), one of the at least two transducers (104a and 104b) being a drive transducer (104b), the meter electronics (112) configured to transmit data representative of a command to the drive transducer (104b) to drive the fins (108a and 108b) in one or more of an in-phase (IP) mode and an out-of-phase (OOP) mode.

[0055] Preferably, the other of the at least two transducers (104a and 104b) is a sense transducer (104a), the meter electronics (112) receiving signal data from the sense transducer (104a) to maintain the drive mode using a controlled feedback loop.

[0056] Preferably, one or more of the at least one fin coupler (120a and / or 120b) and the at least one of the fins (108a and / or 108b) has a coupling element configured to couple the at least one of the at least one fin coupler (120a and 120b) to the at least one of the fins (108a and / or 108b) via the coupling element.

[0057] Preferably, the first fin coupler (120a) has a coupling element and the first fin (108a) has a further coupling element (120b), wherein the coupling element is complementary to the further coupling element such that the coupling element is configured to couple to the further coupling element.

[0058] Preferably, the coupling element is a groove in the first fin (108a).

[0059] Preferably, the at least one fin coupler (120a and / or 120b) is neither an element of the base (106) nor an element of any of the at least two transducers (104a to 104c).

[0060] Preferably, the at least one fin coupler (120a and / or 120b) affects motion of the fins (108a and 108b) in a manner different from the manner in which the base (106) affects motion of the fins (108a and 108b) and the manner in which the at least two transducers (104a to 104c) affect motion of the fins (108a and 108b).

[0061] Preferably, the at least one fin coupler (120a and / or 120b) is not coupled to either the base (106) or any of the at least two transducers (104a to 104c).

[0062] According to one aspect, another embodiment of a fin sensor (102) is disclosed. The another embodiment of the fin sensor (102) has a base (106) coupled to a first fin (108a) and a second fin (108b), the fin sensor (102) further having at least two transducers (104a and 104b) coupled to the fins (108a and 108b), the fin sensor (102) further having a balancing rib (118) coupled to one or more of the base (106) and the base coupler (116).

[0063] Preferably, the balancing rib (118) is configured to at least partially restrict motion of the base (106) along a middle portion of the base (106) on the longitudinal axis (151), the middle portion of the base (106) being a portion defined by a middle of the transverse axis (131).

[0064] Preferably, the balancing rib (118) is coupled to the base (106) at the middle portion of the base (106).

[0065] Preferably, the balancing rib (118) is coupled to a middle portion of the base coupler (116).

[0066] Preferably, the balancing rib (118) is configured to at least partially prevent net motion of the fins (108a and 108b) on the longitudinal axis (151).

[0067] Preferably, the balancing rib (118) is coupled to the base (106) between the first fin (108a) and the second fin (108b).

[0068] Preferably, the balancing rib (118) is coupled to the base (106) at a position on the transverse axis (131) that is different from a position at which the first fin (108a) is or will be coupled to the base (106) and a position at which the second fin (108b) is or will be coupled to the base (106).

[0069] Preferably, the balancing rib (118) is coupled at a position on the transverse axis (131) that is equidistant from the position and the different position.

[0070] Preferably, the balance rib (118) is coupled to the base (106) such that a centerline (198) of the balance rib (118) is parallel to the flow axis (141).

[0071] Preferably, the balance rib (118) is symmetric about the centerline (198) in at least one axis.

[0072] Preferably, the balance rib (118) has a thickness in a lateral axis (131) of the balance rib (118) at one or more of a downstream (145) end of the balance rib (118) and an upstream (143) end of the balance rib (118) that is less than a thickness of a middle portion of the balance rib (118) in the lateral axis (131).

[0073] Preferably, the balance rib (118) has a thickness in a lateral axis (131) of the balance rib (118) at one or more of a downstream (145) end of the balance rib (118) and an upstream (143) end of the balance rib (118) that is greater than a thickness of a middle portion of the balance rib (118) in the lateral axis (131).

[0074] Preferably, the fin sensor (102) further comprises at least one fin coupler (120a and / or 120b) coupled to the fins (108a and 108b).

[0075] Preferably, the base (106) is a variable base (306) having a variable stiffness.

[0076] Preferably, the variable base (306) has a softer portion in a middle of the variable base (306) and a harder portion at an edge of the variable base (306), the middle and edge being a middle and edge of the variable base (306) in a lateral axis (131).

[0077] Preferably, the variable base (306) is thinner in the middle of the variable base (306) than at the edge of the variable base (306) along the lateral axis (131).

[0078] Preferably, the variable base (306) has a material composition that varies along the lateral axis (131).

[0079] Preferably, the variable base (306) has a softer material in the middle along the lateral axis (131) and a harder material at the edge.

[0080] Preferably, the portion of the varying base (306) along the transverse axis (131) between the fins (108a and 108b) is softer than the portion of the varying base (306) on the transverse axis (131) between each of the fins (108a and 108b) and the edge of the varying base (306).

[0081] Preferably, the softer portion (314) and the stiffer portions (310 and 312) can be formed by coupling at least one of the fins (108a and 108b) closer to the edge of the varying base (306) on the transverse axis (131) than to the balance rib (118).

[0082] According to one aspect, an embodiment of a method of manufacturing a fin coupler assembly is disclosed. The embodiment of the method has a fin coupler assembly having at least one fin (108a and / or 108b) and at least one fin coupler (120a and / or 120b), the method comprising the step of forming the fin coupler assembly in which the at least one fin (108a and / or 108b) is coupled to the at least one fin coupler (120a and / or 120b).

[0083] Preferably, the coupling assembly is formed by molding such that the at least one fin coupler (120a and / or 120b) is formed already coupled to the at least one fin (120a and / or 120b).

[0084] Preferably, forming the fin coupler assembly comprises forming the fin coupler (120a) wherein the fin coupler (120a) is distinct from the base (106) and the transducers (104a to 104c).

[0085] Preferably, forming the fin coupler assembly further comprises forming a fin (108a) of the at least one fin (108a and / or 108b) and coupling a fin coupler (120a) of the at least one fin coupler (120a and / or 120b) to the fin (108a).

[0086] Preferably, coupling the fin coupler (120a) to the fin (108a) comprises coupling the fin coupler (120a) to the fin (108a) at a location closer to a free edge (199) of the fin (108a) than to a location of the coupling of the fin (108a) or to be coupled to the base (106).

[0087] Preferably, the method further comprises coupling a first fin coupler (120a) of the at least one fin coupler (120a and / or 120b) to two of the fins (108a and 108b), and coupling a second fin coupler (120b) of the at least one fin coupler (120a and / or 120b) to two of the fins (108a and 108b), wherein the first fin coupler (120a) is coupled at at least one location that is or will be at a different point along the flow axis (141) than the at least one location at which the second fin coupler (120b) is coupled.

[0088] Preferably, forming the fin coupler assembly having a coupling element comprises forming one or more of the at least one fin (108a and / or 108b) and the at least one fin coupler (120a and / or 120b), the coupling element configured to facilitate coupling between the at least one fin (108a and / or 108b) and the at least one fin coupler (120a and / or 120b).

[0089] Preferably, the at least one fin (108a and / or 108b) is coupled to the at least one fin coupler (120a and / or 120b) on a portion of the at least one fin coupler (120a and / or 120b) that resides or will reside on an immersion side (342) of the base (106).

[0090] Preferably, the at least one fin (108a and / or 108b) is coupled to the at least one fin coupler (120a and / or 120b) on a portion of the at least one fin coupler (120a and / or 120b) that resides or will reside on an outside (344) of the base (106).

[0091] Preferably, the method further comprises forming a balancing rib (118) and coupling the balancing rib (118) to one or more of the base (106) and the base coupler (116).

[0092] Preferably, the base (106) is formed as a varying base (306) having a varying stiffness.

[0093] Preferably, the at least one fin coupler (120a and / or 120b) is formed as a rod-shaped fin coupler (220a).

[0094] Preferably, the at least one fin coupler (120a and / or 120b) is formed as a strut (220c).

[0095] Preferably, the at least one fin coupler (120a and / or 120b) is formed as a band-shaped fin coupler (220b).

[0096] Preferably, the method further comprises forming the base (106) and coupling the base (106) to the fins (108a and 108b).

[0097] Preferably, the fins (108a and 108b) are formed with fin protrusions (114a and 114b) that protrude through holes in the base (106), the at least one transducer (104a and / or 104b) being coupled to the fins (108a and 108b) at the fin protrusions (114a and 114b).

[0098] Preferably, the fin protrusions (114a and 114b) are formed with corresponding segments, wherein the corresponding segments are segments that are at least partially aligned on the transverse axis (131), the at least one fin coupler (120a and / or 120b) being coupled to the fins (108a and 108b) at the corresponding segments.

[0099] Preferably, the base (106) is formed with a variable base (306) having a variable stiffness.

[0100] Preferably, the variable base (306) is formed to be softer in a middle portion of the variable base (306) than at edges of the variable base (306) on the transverse axis (131).

[0101] Preferably, the method further comprises coupling a balancing rib (118) to one or more of the base (106) and the base coupler (116).

[0102] Preferably, the at least one fin coupler (120a and / or 120b) is coupled to the fins (108a and 108b) at at least one location of the balancing rib (118) in the first direction (133) and at at least one location of the balancing rib (118) in the second direction (135).

[0103] Preferably, the method further comprises forming a gauge electronics (112) and communicatively coupling the gauge electronics (112) to the transducers (104a and / or 104b and / or 104c), the gauge electronics (112) having a processor and a memory configured to store commands and data for the processor to perform operations, and the gauge electronics (112) being configured to drive in in-phase and out-of-phase modes.

[0104] According to one aspect, embodiments of a method of manufacturing a balanced base assembly are disclosed. Embodiments of the method of manufacturing a balanced base assembly include the steps of: forming a base (106); forming a balancing rib (118); and coupling the balancing rib (118) to one or more of the base (106) and the base coupler (116).

[0105] Preferably, the base (106) is formed as a varying base (306).

[0106] Preferably, the varying base (306) is formed by varying a thickness of the varying base (306) in molding or by cutting away a portion of the varying base (306).

[0107] Preferably, the thickness is varied so that a middle of the varying base (306) is thinner than edges of the varying base (306) in the transverse axis (131).

[0108] Preferably, the varying base (306) is formed by varying a material that makes up the varying base (306) at least along the transverse axis (131).

[0109] Preferably, varying the material includes making up at least a portion of the varying base (306) from a material in a middle of the varying base (306) that is softer than a material at edges of the varying base (306) in the transverse axis (131).

[0110] Preferably, forming the balancing rib (118) includes forming the balancing rib (118) as an elongated member.

[0111] Preferably, coupling the balancing rib (118) to the base (106) includes coupling the balancing rib (118) to the base (106) at a location in a middle of the base (106) in the transverse axis (131).

[0112] Preferably, coupling the balancing rib (118) to the base (106) includes coupling the balancing rib (118) to the base (106) at a location between a location where a first fin (108a) on the base (106) is or will be coupled and a different location where a second fin (108b) on the base (106) is or will be coupled, the location and the different location being in the transverse axis (131).

[0113] Preferably, coupling the balancing rib (118) to the base (106) at a location between a location where a first fin (108a) on the base (106) is or will be coupled and a different location where a second fin (108b) on the base (106) is or will be coupled includes coupling the balancing rib (118) equidistant from the location and the different location in the transverse axis (131).

[0114] Preferably, coupling the balancing rib (118) to the base (106) includes coupling the balancing rib (118) to the base (106) with a centerline (198) of the balancing rib (118) parallel to the flow axis (141).

[0115] Preferably, forming the balance rib (118) includes forming the balance rib (118) such that the balance rib (118) is symmetric about the centerline (198) in at least one axis.

[0116] Preferably, forming the balance rib (118) further includes forming the balance rib (118) such that a thickness of the balance rib (118) in a transverse axis (131) on one or more of a downstream (145) end of the balance rib (118) and an upstream (143) end of the balance rib (118) is less than a thickness of the balance rib (118) in the transverse axis (131) on a middle portion of the balance rib (118) on the flow axis (141).

[0117] Preferably, forming the balance rib (118) further includes forming the balance rib (118) such that a thickness of the balance rib (118) in a transverse axis (131) on one or more of a downstream (145) end of the balance rib (118) and an upstream (143) end of the balance rib (118) is greater than a thickness of the balance rib (118) in the transverse axis (131) on a middle portion of the balance rib (118) on the flow axis (141).

[0118] Preferably, the method further includes forming the fins (108a and 108b) and coupling the fins (108a and 108b) to the base (106).

[0119] Preferably, the method further includes forming at least one fin coupler (120a and / or 120b) and coupling the at least one fin coupler (120a and / or 120b) to the fins (108a and 108b).

[0120] Preferably, the at least one fin coupler (120a and / or 120b) is coupled to a first one of the fins (120a) in a first direction (133) relative to the balance rib (118) and the at least one fin coupler (120a and / or 120b) is coupled to a second one of the fins (120b) in a second direction (135) relative to the balance rib (118).

[0121] Preferably, at least one of the fins (108a and / or 108b) is coupled to the base (106) at a location in the first direction (133) relative to the balance rib (118) in the transverse axis (131) that is closer to an edge of the balance rib (118) in the first direction (133) relative to the base (106) than to the balance rib (118).

[0122] Preferably, at least one of the fins (108a and / or 108b) is coupled to the base (106) at a location on the transverse axis (131) relative to the first direction (133) of the balancing rib (118) that is further from an edge of the base (106) relative to the balancing rib (118) in the first direction (133) than from the balancing rib (118).

[0123] Preferably, the method further comprises forming a meter electronics (112) having a processor and a memory configured to store commands and data for the processor to perform operations, and communicatively coupling the meter electronics (112) to the transducer (104a and / or 104b and / or 104c), and configuring the meter electronics (112) to drive the fins (108a and 108b) in the in-phase and out-of-phase modes.

[0124] According to an aspect, embodiments of a method of using a fin sensor (102) are disclosed. The embodiments of the method of using a fin sensor (102) having a drive transducer (104b) to drive vibrations in a first fin (108a) and a second fin (108b), the first and second fins (108a and 108b) coupled to a base (106), the fin sensor (102) having at least one sense transducer (104a) to receive response data, the method having the step of at least partially restricting movement of the first fin (108a) relative to the movement of the second fin (108b) by at least one fin coupler (120a and / or 120b).

[0125] Preferably, at least partially restricting movement of the first fin (108a) relative to the movement of the second fin (108b) by at least one fin coupler (120a and / or 120b) comprises at least partially restricting movement of a free edge (199) of the first fin (108a) relative to a free edge (199) of the second fin (108b).

[0126] Preferably, the vibrations are driven by the drive transducer (104b) to drive the fins (108a and 108b) in an out-of-phase (OOP) mode.

[0127] Preferably, the out-of-phase (OOP) mode represents a phase separation of about 180° between the movement of the first fin (108a) and the second fin (108b).

[0128] Preferably, restricting movement of the first fin (108a) relative to the second fin (108b) by the at least one fin coupler (120a and / or 120b) at least partially comprises restricting movement of the first fin (108a) relative to the second fin (108b) at least at a location where the at least one fin coupler (120a and / or 120b) is coupled to the first fin (108a).

[0129] Preferably, the at least one fin coupler (120a and / or 120b) does not directly restrict movement of any element of the base (106), the at least one fin coupler (120a and / or 120b) is not coupled to an element of the base (106), nor is the at least one fin coupler (120a and / or 120b) an element of the base (106).

[0130] Preferably, the method further comprises at least partially restricting movement of the base (106) with the balancing rib (118).

[0131] According to an aspect, embodiments of a method of using a fin sensor (102) are disclosed. Embodiments of a method of using a fin sensor (102) can have a fin sensor (102) having a drive transducer (104b) that drives vibrations in a first fin (108a) and a second fin (108b), the first fin (108a) and the second fin (108b) coupled to a base (106), the fin sensor (102) having at least one sense transducer (104a) that receives response data, the fin sensor (102) having a balancing rib (118), the method having a step of at least partially restricting movement of the base (106) with the balancing rib (118).

[0132] Preferably, at least partially restricting movement of the base (106) with the balancing rib (118) comprises at least partially restricting movement of the base (106) along a middle portion of the base (106) on a longitudinal axis (151), the middle portion being a portion defined by a middle of a transverse axis (131).

[0133] Preferably, at least partially restricting movement of the base (106) with the balancing rib (118) comprises at least partially preventing net movement of the fins (108a and 108b) on the longitudinal axis (151).

[0134] Preferably, at least partially restricting movement of the base (106) with the balancing rib (118) comprises at least partially preventing net movement of the fin sensor (102) on the longitudinal axis (151).

[0135] Preferably, limiting the motion of the base (106) at least partially includes limiting the motion of the base (106) at least along a straight portion of the base (106) that is parallel to the flow axis (141).

[0136] Preferably, limiting the motion of the base (106) at least partially includes limiting the motion of the base (106) at least along a straight portion of the base (106) that is parallel to the flow axis (141).

[0137] Preferably, limiting the motion of the base (106) at least partially includes limiting the motion of the base (106) at least along a straight portion of the base (106) that is parallel to the flow axis (141).

[0138] Preferably, limiting the motion of the base (106) at least partially includes limiting the motion of the base (106) such that movement of one or more of a downstream (145) end of the base (106) and an upstream (143) end of the base (106) is limited less than a middle of the base (106), the middle of the base (106) being a middle of the base (106) on the flow axis (141).

[0139] Preferably, limiting the motion of the base (106) at least partially includes limiting the motion of the base (106) such that movement of one or more of a downstream (145) end of the base (106) and an upstream (143) end of the base (106) is limited more than a middle of the base (106), the middle of the base (106) being a middle of the base (106) on the flow axis (141). BRIEF DESCRIPTION OF DRAWINGS

[0140] In all of the drawings, like reference numerals will refer to like parts throughout the various figures. It is to be understood that the drawings are not necessarily to scale.

[0141] Figure 1 A perspective view of an embodiment of a flow sensor system 100 with fin-type sensors is shown.

[0142] Figure 2A A perspective view of an embodiment of a fin coupler assembly 200a with a rod-shaped fin coupler 220a is shown.

[0143] Figure 2B A perspective view of an embodiment of a fin coupler assembly 200b with a strap-shaped fin coupler 220b is shown.

[0144] Figure 2CA perspective view is shown of an embodiment of a fin coupler assembly 200c having strut fin couplers 220c.

[0145] Figure 3 is a cross-sectional view of an embodiment of a flow sensor system 300 having a fin sensor 302 having a varying base 306 in a balanced base assembly.

[0146] Figure 4 A block diagram is shown of an embodiment of a computer system 400. In embodiments, the computer system 400 can be an instrument electronics, for example, the instrument electronics 112.

[0147] Figure 5 A flowchart is shown of an embodiment of a method 500 for using a fin sensor 102 of a fin coupler assembly.

[0148] Figure 6 A flowchart is shown of an embodiment of a method 600 for using a balanced base assembly of a fin sensor 102.

[0149] Figure 7 A flowchart is shown of an embodiment of a method 700 of manufacturing a fin coupler assembly of a fin sensor 102.

[0150] Figure 8 A flowchart is shown of an embodiment of a method 800 of manufacturing a balanced base assembly of a fin sensor 102.

[0151] Figure 9 A flowchart is shown of an embodiment of a method 900 of manufacturing a balanced base and fin coupler assembly of a fin sensor 102.

[0152] Figure 10 A comparison 1000 is shown of embodiments of a fin sensor 102 with and without fin couplers 120a and 120b on the immersed side 342 of a base 106 driven in in-phase (IP) and out-of-phase (OOP) modes.

[0153] Figure 11 A comparison 1100 is shown of embodiments of a fin sensor 102 with and without a balancing rib 118 at undeformed and deformed positions.

[0154] Figure 12 A comparison 1200 is shown of embodiments of a fin sensor 102 with and without fin couplers 120a and 120b on the outer side 344 of a base 106 driven in in-phase (IP) and out-of-phase (OOP) modes. DETAILED DESCRIPTION

[0155] Figures 1 to 12 The following description depicts specific examples to teach those skilled in the art how to manufacture and use the best mode of implementation for the fin coupler assembly and balancing base assembly of the fin sensor. Some conventional aspects have been simplified or omitted for the purpose of teaching the principles of the invention. Those skilled in the art will understand variations of these examples that fall within the scope of this specification. Those skilled in the art will understand that the features described below can be combined in various ways to form multiple variations of the fin coupler assembly and balancing base assembly for the fin sensor. Therefore, the embodiments described below are not limited to the specific examples described below, but are defined only by the claims and their equivalents.

[0156] Figure 1 A perspective view of an embodiment of a flow sensor system 100 with a finned sensor is shown. System 100 has a finned sensor 102, which has an upstream transducer 104a, a drive transducer 104b, a downstream transducer 104c, a base 106, a first fin 108a, a second fin 108b, a pipe 110 (not shown), an instrumentation electronics 112 (not shown), a first fin protrusion 114a, a second fin protrusion 114b, a base coupler 116, a balance rib 118, a first fin coupler 120a, a second fin coupler 120b, a transverse axis 131 having a first direction 133 and a second direction 135, a flow axis 141 having an upstream direction 143 and a downstream direction 145, a longitudinal axis 151 having an upward direction 153 and a downward direction 155, an end 196 of the balance rib, a middle portion 197 of the balance rib, a centerline 198 of the balance rib, and a free edge 199. Figures 1 to 4 and Figures 10 to 12 The images in the image may not be scaled relative to the various implementations of system 100.

[0157] The flow system 100 can use the fin sensor 102 to determine flow characteristics. For example, the fin sensor 102 can drive elements of the fin sensor 102, which uses transducers to drive vibrations in the elements of the fin sensor 102. The transducers can be any type of driving or pick-off device, such as a piezoelectric device or a magnet and coil arrangement. Any, some, or all of the transducers can measure a phase difference or time difference of the signals measured by the transducers in order to determine flow characteristics, such as determining mass flow rate. In embodiments, the fin sensor 102 is a Coriolis flow sensor that uses a transducer arrangement that can rely on Coriolis forces on the elements in the fin sensor 102 to generate these flow rates. The phase difference or time delay can be generated by driving an element and measuring an element, such as by vibrating the base and measuring the response in the transducers, by vibrating the fin and measuring the response at the fin, or by comparing the signal used to generate the vibration (the drive signal) to the response at the fin. Flow rate measurements can be generated from the phase difference and / or frequency response signals acquired by the transducers 104a-c. The fin sensor 102 can be used to generate density measurements by determining the frequencies of oscillation and using methods known in the art to determine density from these frequencies. For example, density measurements can be generated from the frequency response signals acquired by the transducers 104a-c. Viscosity measurements can be derived in the fin sensor 102 from the phase difference or time delay measured by the transducers, such as based on the phase difference of two possible derived non-resonant frequency drives. The flow rate, density, and viscosity measurement methods of a vibratory meter are well established in the art. The fins can be coupled at specific locations using fin couplers. In various embodiments, the fin sensor 102 can be one or more of a Coriolis flow meter, a fin meter, or a fork meter (possibly with fins or tines).

[0158] The fin couplers 120a and 120b can be used to enhance the mode separation between in-phase (hereinafter "IP") mode and out-of-phase (hereinafter "OOP") mode. In embodiments, the OOP mode can be a mode in which the first fin 108a and the second fin 108b vibrate with a phase difference of 180 degrees or approximately 180 degrees from each other. Further, the fin couplers can introduce more curling motion to enhance the sensitivity of the fin sensor 102 measurements. In embodiments, the base 106 can be a plate with thin middle portions and thick outer portions along the transverse axis 131. The base 106 can also have balance ribs 118 that control deflection, and can limit the net motion of the fin sensor 102 on the longitudinal axis 151 relative to the pipe to which the base is coupled.

[0159] In embodiments, the fin sensor 102 can have two fins, a first fin 108a and a second fin 108b. The first fin 108a and the second fin 108b are fins that are at least partially immersed in the flowing fluid during operation of the fin sensor 102. Embodiments using more fins are contemplated. For example, embodiments having 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, or more fins are contemplated. In other embodiments, teeth can be used in place of fins, where the teeth have some or all of the same characteristics and arrangements of the fins 108a and 108b disclosed in this specification. When the specification refers to fins, the specification also contemplates embodiments using teeth.

[0160] The fins 108a and 108b can be arranged parallel to each other and can be arranged with their lengths parallel or substantially parallel to the expected path of fluid flow in the pipe. The fins 108a and 108b can be arranged such that they have portions that extend through the base 106, where the fins 108a and 108b can not have portions that extend through the base 106 where the fins 108a and 108b are immersed in the flowing fluid, such as the side of the base 106 that is the immersed side 342 (as shown in FIG. 3B) or the outer side 344 (as shown in FIG. 3C) of the base 106. Figure 3 The fins 108a and 108b can have a fin protrusion 114a and 114b on the side of the base 106 that is the immersed side 342 (as shown in FIG. 3B) or the outer side 344 (as shown in FIG. 3C). Figure 3 The fins 108a and 108b can have a fin protrusion 114a and 114b on the side of the base 106 that is the immersed side 342 (as shown in FIG. 3B) or the outer side 344 (as shown in FIG. 3C).

[0161] The fins 108a and 108b can have a free edge 199, which can be defined as the lowermost 155 edge of the fin. A fin coupler (e.g., the fin couplers 120a and 120b) can be used to limit the motion of the free edge 199 of the first fin 108a relative to the coupled second fin 108b, possibly by coupling a portion of the free edge 199 of the first fin 108a to a portion of the free edge 199 of the second fin 108b or possibly by coupling other portions of the fins 108a and 108b.

[0162] Fins 108a and 108b can be coupled to one another using one or more fin couplers. Fin couplers 120a and 120b are elements that couple the motion of fins 108a and 108b at specific locations on fins 108a and 108b. For the purposes of this specification, first fin coupler 120a is shown as the upstream 143 fin coupler relative to second fin coupler 120b. In various embodiments, any number of fin couplers can be used to couple adjacent fins and / or non-adjacent fins. For example, the couplers that couple each group of coupled fins can be 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, and any other number of couplers 120a and 120b. In various embodiments, a certain number of fins can be coupled while a certain number of fins can not be coupled, for example, all fins, three-quarters of the fins, two-thirds of the fins, half of the fins, one-quarter of the fins, one-third of the fins, one-eighth of the fins, one-tenth of the fins, or similar proportions of fins can be coupled.

[0163] In embodiments, one, a combination, or all of fins 108a and 108b can extend or substantially extend the entire length of base 106. For example, in this context, substantially can mean that the fin does not extend to the portion of base 106 used to couple the base to the duct, or that the fin does not extend to the portion of the base that is immediately adjacent to the portion of base 106 that is coupled to duct 110 and / or base coupler 116.

[0164] Duct 110 is a duct through which fluid can flow. Any type of duct known in the art can be used. Duct 110 is not shown in Figure 1 but the manner in which fluid ducts and flow sensors, such as fin sensor 102, are coupled to ducts is well known in the art of flow sensors.

[0165] The fin couplers 120a and 120b can couple the fins 108a and 108b at multiple locations between the fins. For example, the fin couplers 120a and 120b can couple the fins 108a and 108b at substantially the same location on the respective faces of the fins 108a and 108b, the fins can be arranged to have the same placement site, such that when the fins 108a and 108b are placed in the same orientation in the plane defined by the flow axis 141 and the longitudinal axis 151 (e.g., if the fins have the same shape and size), the fin couplers 120a and 120b are parallel or substantially parallel to the lateral axis 131, or the fin couplers 120a and 120b can be coupled at different locations on each of the respective fins 108a and 108b. The fin couplers 120a and 120b can be coupled to one or more of the fins 108a and 108b at one, a combination, or all of the locations in the area of at least one of the fins 108a and 108b represented by: the lowermost 155 and upstream 143 quadrant portion of at least one of the fins 108a and 108b (which quadrant can not include the center location of at least one of the fins 108a and 108b); the lowermost 155 and downstream 145 quadrant portion of at least one of the fins 108a and 108b (which quadrant can not include the center location of at least one of the fins 108a and 108b); the lowermost 155 and upstream 143 corner of at least one of the fins 108a and 108b; the lowermost 155 and downstream 145 corner of at least one of the fins 108a and 108b; the central one-ninth area portion of at least one of the fins 108a and 108b; the area defined by the middle one-third area portion on the longitudinal axis 151 of at least one of the fins 108a and 108b and the upstream 143 one-third portion; the area defined by the middle one-third portion on the longitudinal axis 151 of at least one of the fins 108a and 108b and the downstream 145 one-third portion; the area defined by the upper 153 one-third portion on the longitudinal axis 151 of at least one of the fins 108a and 108b and the upstream 143 one-third portion; the area defined by the upper 153 one-third portion on the longitudinal axis 151 of at least one of the fins 108a and 108b and the downstream 145 one-third portion; the area defined by the lower 155 one-third portion on the longitudinal axis 151 of at least one of the fins 108a and 108b and the upstream 143 one-third portion; the area defined by the lower 155 one-third portion on the longitudinal axis 151 of at least one of the fins 108a and 108b and the downstream 145 one-third portion; and / or the like.

[0166] Embodiments are contemplated in which the face of the fin does not have a planar surface. In this case, the regions set forth in the preceding paragraph can represent the projection of those associated regions from the largest fin cross section in any plane defined by the flow axis 141 and the longitudinal axis 151 onto the region of the face of the fin (e.g., the inner face of 108a) facing the inner face of the other fin (e.g., the inner face of 108b), the associated regions being projected along a line on the transverse axis. For purposes of the claims, these regions are referred to as "projected regions."

[0167] The fin couplers 120a and 120b can have different shapes and configurations. For example, one or more of the fin couplers 120a and 120b can be, for example, a rod or a cylinder, a strut, a beam (which can have a square, circular, triangular, other polygonal, elliptical, and / or similar shape cross section relative to a plane defined by the flow axis 141 and the longitudinal axis 151 when no flow is present), a ribbon having a planar region (which is planar or substantially planar relative to a plane defined by the flow axis 141 and the longitudinal axis 151 when no flow is present, or which is planar relative to a plane defined by the longitudinal axis 151 and the transverse axis 131), a helical structure, etc. This specification contemplates combinations of fin couplers 120a and / or 120b of different shapes, for example, a fin sensor 102 can have an upstream fin coupler 120a that is a rod and a downstream fin coupler 120b that is represented by one or more struts. These are merely exemplary, and all combinations of shapes and configurations are contemplated by the specification.

[0168] The fin couplers 120a and 120b can be composed of any number of materials, and can have a different material than any combination or all of the pipe 110, the base 106, the transducers 104a-c, the fins 108a and 108b, and / or the portions of the fins 108a and 108b that are coupled with the fin couplers 120a and / or 120b. The fin couplers 120a and 120b can be composed of the same material throughout the fin sensor 102, or can have different compositions between them.

[0169] One or more of the fin couplers 120a and 120b can be made of a flexible material to allow some flexure and modal flexibility of one or more of the fin couplers 120a and 120b, which can enhance the mobility of one or more of the fins 108a and 108b or one or more of the fin couplers 120a and 120b in some modes more than in other modes. One or more of the fin couplers 120a and 120b can be made of a rigid material to limit the flexure and modal flexibility of one or more of the fin couplers 120a and 120b, which can enhance the mobility of one or more of the fins 108a and 108b or one or more of the fin couplers 120a and 120b in some modes more than in other modes. The fin couplers 120a and 120b can be assembled with the fins 108a and 108b, which assembly is referred to in this specification as a fin coupler assembly.

[0170] When the fins 120a and 120b are driven in an out-of-phase mode, the fin couplers 120a and 120b can increase the curl of the fins 108a and 108b. The fin couplers 120a and 120b can increase the axial stiffness, which can result in increased curl. The increased curl can allow the fin sensor 102 to better couple the fins to the flowing medium and induce a Coriolis response, which can be similar to a typical Coriolis mass flow meter, a dip meter, or a fin meter. In addition, the curl generated in the fins 108a and 108b by including the fin couplers 120a and 120b in an out-of-phase mode can provide a different, potentially higher frequency, which potentially generates mode separation, as compared to a similarly driven fin sensor 102 in an in-phase mode. The axial stiffness provided by the fin couplers 120a and 120b can also cause the free edge 199 tips of the fins 108a and 108b to be stationary, substantially stationary, or at least limit the mobility of the free edges of the fins 108a and 108b relative to the movement the fins 108a and 108b would have without the fins 108a and 108b being coupled by the fin couplers 120a and 120b, which can reduce their drag in the flowing medium and can have less impact on the fluid structure interactions.

[0171] The fin couplers 120a and 120b should be understood as functional elements that act independently of the base 106 and the transducers 104a-c. The fin couplers 120a and 120b can be separate from the base 106 and the transducers 104a-c, and the fin couplers 120a and 120b can be elements that are not coupled to one or more of the transducers 104a-c and the base 106 (and possibly not coupled to any of them). In such an arrangement, the fin couplers 120a and 120b can affect the motion of the fins 108a and 108b in a manner different from the base 106 and the transducers 104a-c affecting the motion of the fins 108a and 108b.

[0172] For the purposes of this specification, a fin coupler assembly is an assembly in which at least one fin (108a and / or 108b) is coupled to at least one fin coupler (120a and / or 120b). Embodiments are contemplated in which more fin couplers are coupled to fins. For example, in embodiments, a fin coupler assembly has two fins (108a and 108b) coupled by, for example, two (as shown, 120a and 120b), three, four, five, six, or more fin couplers. In further embodiments, a fin coupler assembly can have coupling elements for coupling fins to fin couplers. These coupling elements can be formed as parts of either or both of the fins and / or the fin couplers, or the entire fin coupler assembly can be molded. Examples of coupling elements can include grooves, tabs, pins, threaded articles, segments for use with brazing, solder, or welding, fasteners, adhesives, and / or the like.

[0173] The base 106 is a base of the fin sensor 102 to which fins are coupled. The base 106 can limit the motion of the fins 108a and 108b. In embodiments, the base 106 has holes through which the fins 108a and 108b are positioned, with the fins 108a and 108b having elements on the upper 153 and lower 155 sides of the base 106.

[0174] In embodiments, the base 106 is conformal with the pipe, such that the base 106 serves as an element of the pipe, with one side of the base 106 (in the illustrated embodiment, possibly the lower 155 side) being exposed to fluid flowing in the pipe 110 during operation.

[0175] In embodiments, the base 106 can be or have a plate. In embodiments, the plate can be a plate having a thickness (or stiffness) less than or greater than the thickness of the material defining the pipe 110. In embodiments, the plate can be thicker in some portions of the plate and thinner in other portions. For example, the center of the plate can be thinner than the area of the plate coupled to the pipe, the middle of the plate relative to the transverse axis 131 can be thinner than the edge of the plate adjacent to the pipe 110 on the transverse axis 131, the middle of the plate relative to the transverse axis 131 can be thicker than the edge of the plate adjacent to the pipe 110 on the transverse axis 131, the thickness of the plate can have a grade that one of continuously increases or decreases from at least the edge of the plate adjacent to the pipe on the transverse axis 131 to the middle of the plate on the transverse axis 131, etc. In embodiments, the material can be varied instead of the thickness of the plate, which makes softer and stiffer regions of the plate possible. Any of the relationships disclosed with respect to thickness and thinness in the plate are considered with respect to stiffness and softness, respectively (possibly by varying the material). The varying thickness (or softness) in the plate can allow for better net cancellation of forces on the longitudinal axis 151.

[0176] The base coupler 116 is an element that couples the base 106 to the environment in which the fin sensor 102 is used. For example, the base coupler 116 can be used to couple the base 106 of the fin sensor 102 to a location where flow is being measured (e.g., the pipe 110). The base coupler 116 can couple the base 106 to the pipe along a perimeter of the base 106. The base 106 can be coupled to the base coupler 116 in any manner known in the art, for example, by one or more of welding, brazing, adhesive bonding, or mechanical fit. In embodiments, the base 106 can be formed as a unitary component with the base coupler 116.

[0177] The balancing ribs 118 are elements that partially restrict flexing of the base 106 at certain locations of the base 106. The balancing ribs 118 can be elongate members. The balancing ribs 118 can be composed of a material that is sufficiently rigid to restrict movement such as vibrational and / or oscillatory movement. The balancing ribs 118 can help to cancel out the net motion of the fin sensor 102 relative to the duct 110 in the longitudinal axis 151. The balancing ribs 118 can be coupled to one or more of the base 106, the duct 110, and the base coupler 116. In embodiments, the balancing ribs 118 are directly coupled to at least one of the fins 108a and 108b, but in other embodiments, the balancing ribs 118 can not be coupled to the fins 108a and 108b. In various embodiments, the balancing ribs 118 can be coupled to the base 106 at a plurality of locations along the base 106, for example, at locations along the base that include at least a center of the base 106, at locations along the base 106 that represent a middle portion of the base 106 along the flow axis 141, and the like. In embodiments, the balancing ribs 118 can extend across or substantially across a length of the base 106, which can be an entire length of the base 106 or a length of the base 106 that is not restricted by the base coupler 116. The base coupler 116 can be coupled to the base plate at locations along the transverse axis 131 that are equidistant from the portions of the base 106 that the fins protrude through. By perhaps positioning the balancing ribs 118 equidistant from the fin protrusions along the transverse axis 131 between the fin protrusions, the balancing ribs 118 can force the fins to rotate about a pivot point at or substantially near a point at or at an edge of the base 106 where the base 106 is not restricted. This can force the fins to have no net longitudinal axis 151 motion and thus no counteracting motion of the surrounding structure.

[0178] In embodiments, if the balancing ribs 118 are symmetric about a center line 198 along a longest length of the balancing ribs 118, the balancing ribs 118 can have a center line 198 that represents a center of the length. Although in Figure 1The centerline 198 is depicted as a dashed line visible on the surface, but the centerline is internal to the balance rib 118, the centerline can be at the centroid of each cross section defined by the plane of the transverse axis 131 and the longitudinal axis 151. In embodiments, the balance rib 118 can be coupled to the fin sensor 102 such that the centerline 198 is parallel or substantially parallel to the flow axis 141. In embodiments, the balance rib 118 can have a uniform thickness about the centerline 198 along the flow axis 141. In another embodiment, the balance rib 118 can have a varying thickness about the centerline 198 along the flow axis 141 and / or have a varying thickness in the transverse axis 131 along the flow axis 141 itself. For example, in embodiments, the thickness of the balance rib in the transverse axis 131 about at least one end 196 of the centerline 198 can be greater than the thickness of the balance rib in the transverse axis 131 about the middle portion 197 of the centerline 198. In another embodiment, the thickness of the balance rib in the transverse axis 131 about at least one end 196 of the centerline 198 can be less than the thickness of the balance rib in the transverse axis 131 about the middle portion 197 of the centerline 198.

[0179] Embodiments are contemplated in which a balance base assembly is formed. The balance base assembly can include at least the base 106 and the balance rib 118. In various embodiments, the balance base assembly can also include the fins 108a and 108b. Further, the base 106 can be configured as a varying base 306 as shown and generally described in the specification. Figure 3 In embodiments, the balance base assembly can be a component of the fin sensor 102.

[0180] The transducers 104a-c are elements that drive and / or measure the motion of the fins 108a and 108b. While three transducers are shown, any number of transducers can be used. In the embodiment shown, the upstream transducer 104a is a sensing transducer that measures the relative motion of the first fin 108a to the second fin 108b upstream oscillations. Figure 1 In the embodiment shown, the upstream transducer 104a is a sensing transducer that measures the relative motion of the first fin 108a to the second fin 108b upstream oscillations. Figure 1 In the embodiment shown, the drive transducer 104b is a transducer that acts as a driver and vibrates the middle portion of the first fin 108a and / or the segment of the protrusion 114a or the segment of the protrusion 114a and the middle portion of the second fin 108b or the segment of the protrusion 114b, the middle position being a middle position of the fins along the flow axis 141. In other embodiments, the drive transducer 104b used as a driver can drive the base 106, or can drive fewer or more of the fins 108a and 108b. In another embodiment, the drive transducer 104b can be internal to the base 106 and vibrate at least one of the fins 108a and 108b and / or one or more of the base 106.Figure 1 In the illustrated embodiment, downstream transducer 104c is a downstream oscillation sensing transducer that measures the relative motion between first fin 108a and second fin 108b. The phase difference or time delay between the upstream and downstream oscillations can be measured in order to produce a mass flow rate of the fluid flowing through and / or around the fins. In another embodiment, instead of or in addition to the measured vibrational response upstream or downstream, the phase difference can be determined using the command signal from the drive transducer 104b. Transducers 104a-c can also be used to drive and make measurements that can be used with known techniques to determine density and / or viscosity. Combining these measurements can yield a volumetric flow rate. Methods for these determinations are well known in the art.

[0181] In an embodiment, transducers 104a-c can be coupled to fin protrusions 114a and 114b. Fin protrusions 114a and 114b can have different segments for coupling the transducers. For example, in an embodiment, each of 114a and 114b can have three segments that can have complementary faces that face each other between fin protrusions 114a and 114b. Each of transducers 104a-c can be coupled to one of the corresponding segments of fin protrusions 114a and 114b (the corresponding segments can face each other on a transverse axis 131). In this embodiment, the three transducers 104a-c can be aligned with each other on a flow axis 141 (at least when fin sensor 102 is not in operation). In this embodiment, transducers 104a-c can be coupled to fins 108a and 108b in a positioning on a side of base 106 that is opposite to a side of base 106 that has the portion of fins 108a and 108b immersed.

[0182] In various embodiments, fin couplers 120a and / or 120b can couple fins 108a and / or 108b on the immersion side 342 or the outer side 344. For example, in embodiments in which the fin couplers couple the fins 108a and 108b on the outer side by coupling the fin tabs 114a and 114b, e.g., by coupling segments representing the fin tabs 114a and 114b. The fin couplers 120a and / or 120b can couple to the fins at a location below 155 and / or above 153 of the area on the fins 108a and / or 108b where one or more of the transducers 104a-c are coupled. In embodiments, the fin couplers 120a and / or 120b couple to the fins on the outer side 344 of the base 106 at a location closer to the base 106 than where the transducers 104a-c are coupled on the fins 108a and / or 108b. In embodiments, the fin couplers 120a and / or 120b couple to the fins on the outer side 344 of the base 106 at a location closer to where the transducers 104a-c are coupled on the fins 108a and / or 108b than to the base 106. In embodiments in which the fin couplers 120a and / or 120b are coupled to the fins 108a and / or 108b on the outer side 344 of the base 106, it can be appreciated that the fin couplers 120a and / or 120b can be outside of the fluid flow and can reduce the likelihood that the fin couplers 120a and / or 120b affect the flow profile and / or are susceptible to erosion and / or corrosion. In embodiments in which the fin couplers 120a and / or 120b are coupled to the fins 108a and / or 108b on the outer side 344 of the base 106, the fin couplers 120a and / or 120b can still cause mode separation and / or can still cause more curl in the OOP mode.

[0183] The meter electronics 112 is a set of electronic logic circuits that determines flow characteristics from flow measurements. The meter electronics 112 determines the flow characteristics from the flow measurements in Figure 1The instrument electronics 112 can have logic circuitry representing processing elements, logic circuitry representing memory, logic circuitry for sending and receiving data, and communication couplings coupled to sensors, drivers, computing devices, other instrument electronics 112, etc. The instrument electronics 112 can execute commands stored in memory by a processor to send drive signals, receive sensor data (e.g., from sensing transducers such as upstream transducer 104a and downstream transducer 104c), determine flow characteristics, and / or send raw or determined data to external computing devices or sensors, etc. The instrument electronics 112 can be used to determine and / or send data representative of, for example, mass flow rate, density, volume flow rate, etc. The instrument electronics 112 can be configured to use the drive transducer 104b to drive or send instructions to drive fins 108a and 108b at different frequencies, phases, and / or different modes. In embodiments, the instrument electronics 112 can be coupled to the base 106 or fins 108a and 108b, and possibly on the outside 344 of the base 106. In another embodiment, the instrument electronics 112 can be a device external to the fin sensor 102. The instrument electronics 112 can be Figure 4 an embodiment of the computer system 400.

[0184] In embodiments, one, any combination, or all of the electronic elements can be external to the flow of fluid and / or can be external to the base. The electronic elements can include one, any combination, or all of the transducers 104a-c and / or the instrument electronics 112.

[0185] The flow axis 141 is the general direction of intended flow of the flowing fluid in the pipe, the flow axis 141 being orthogonal to the lateral axis 131 and the longitudinal axis 151. In a straight pipe, the flow axis can be defined by the center of the pipe interior along a line representative of the fluid flow. The upstream direction 143 is defined as upstream of the direction from which the flowing fluid begins to flow along the flow axis 141. The downstream direction 145 is defined as downstream of the direction to which the flowing fluid flows along the flow axis 141.

[0186] The longitudinal axis 151 is a line that bisects the center point of the interior cross-section of the pipe 110 (a cross-section having the same interior radius as the entire pipe) and the base 106 if the pipe is coupled, the longitudinal axis 151 being orthogonal to the flow axis 141 and the lateral axis 131. The upward direction 153 is defined as the direction along the longitudinal axis 151 from the center of the pipe 110 to the base 106. The downward direction 155 is defined as the direction along the longitudinal axis 151 from the base 106 to the center of the pipe 110.

[0187] The lateral axis 131 is an axis defined as parallel or substantially parallel to the base 106 (if the base is curved, the lateral axis can be parallel to a line representing the average distance of the base 106 from the center of the conduit 110) and orthogonal to the axis of fluid flow, the lateral axis 131 is orthogonal to the flow axis 141 and the longitudinal axis 151. The first direction 133 and the second direction 135 are opposite directions along the lateral axis 131. In the illustrated implementation, the first direction 133 can be a direction to the left of the conduit 110 when viewing a cross-section of the conduit 110 defined by the longitudinal axis 151 and the lateral axis 131 from a perspective facing the downstream direction 145. While the directions and reference axes appear to be related to the fin sensor 102 and the flow therethrough, it should be understood that the disclosed implementations of particular elements of the fin sensor meter can be considered independent elements having directions and reference axes generally only for purposes of illustrating relative positioning, coupling, placement, and configuration of those elements isolated from the fin sensor 102 and the flow therethrough when described with respect to the directions and reference axes. For example, if the thickness of the balance rib 118 varies along the flow axis, the variation can generally be related only to the balance rib 118 itself in the figure and not to the flow or flow sensor 102. Further, it should be understood that the disclosed implementations of the fin sensor 102 and its elements are primarily directed to references that represent relative positioning, coupling, placement, and configuration of the fin sensor 102 when not experiencing the flow, such as at the time of manufacture or installation.

[0188] Figures 2A to 2C Perspective views of implementations of fin coupler assemblies 200a-200c are shown. The fin coupler assemblies 200a-200c can be implementations of the fin coupler assemblies disclosed in the description of Figure 1 The figures shown can not be to scale, and implementations having different relative dimensions are contemplated. For purposes of clarity, references having reference directions and axes are shown for particular perspective views of Figures 2A to 2C

[0189] Figure 2A A perspective view of an implementation of a fin coupler assembly 200a having a rod-shaped fin coupler 220a is shown. The rod-shaped fin coupler 220a can be an implementation of the fin couplers (120a and 120b). For purposes of this specification, a fin coupler assembly is an assembly in which at least one fin (108a and / or 108b) is coupled to at least one fin coupler (120a and / or 120b). The rod-shaped fin coupler 220a can be an implementation of the fin coupler 120a or 120b.

[0190] Figure 2B ​A perspective view of an embodiment of a fin coupler assembly 200b having a ribbon fin coupler 220b is shown. The ribbon fin coupler 220b can be an embodiment of the fin coupler 120a and / or 120b. In alternative embodiments, the flat portions of the ribbon can be parallel to the plane defined by the transverse axis 131 and the flow axis 141 when there is no flow in the duct, can be parallel to the plane defined by the longitudinal axis 151 and the transverse axis 131, or can have portions that twist in a helical manner. In another embodiment, the ribbon fin coupler 220b can have at least one tapered end. For example, the ribbon fin coupler 220b can be tapered such that one or more of the upstream 143 and downstream 145 ends of the ribbon fin coupler 220b have a cross-sectional area in the plane defined by the longitudinal axis 151 and the transverse axis 131 that is less than a more central portion of the ribbon fin coupler 220b along the flow axis 141 in the plane defined by the longitudinal axis 151 and the transverse axis 131. For example, the cross-section of the ribbon fin coupler 220b in the plane defined by the longitudinal axis 151 and the flow axis 141 can be narrower at one or more of the upstream 143 and downstream 145 ends of the cross-section on the longitudinal axis 151 than at at least one more central portion of the cross-section on the flow axis 141.

[0191] Figure 2C A perspective view of an embodiment of a fin coupler assembly 200c having a strut fin coupler 220c is shown. The strut fin coupler 220c can be an embodiment of the fin coupler 120a or 120b. The curve 204c (not shown) of the strut fin coupler 220c can be such that the strut fin coupler 220c is coupled between different or the same locations of the respective faces of the fins 108a and 108b. For example, the strut fin coupler 220c can be one or more of the following: coupled to a location on the first fin 108a that is above 153 a location on the respective face of the second fin 108b to which the same strut fin coupler 220c can be coupled; coupled to a location on the first fin 108a that is upstream 143 of a location on the respective face of the second fin 108b to which the same strut fin coupler 220c can be coupled; etc.

[0192] In Figures 2A to 2C It will be appreciated that any of the fin couplers 120a and / or 120b, regardless of shape or configuration, can be coupled to each of the fins 108a and / or 108b in any of the locations or manners disclosed in this specification, in the embodiments shown.

[0193] Figure 3is a cross-sectional view of an embodiment of a flow sensor system 300 with a fin sensor 302 having a varying base 306 in a balanced base assembly. The cross-sectional view is a cross-section in a plane defined by the longitudinal axis 151 and the lateral axis 131. The flow sensor system 300 can have a fin sensor 302 with a varying base 306, a first fin 308a, a second fin 308b, an immersion side 342, and an outer side 344. The flow sensor system 300, the fin sensor 302, the varying base 306, the first fin 308a, and the second fin 308b can be embodiments of the fin sensor system 100, the fin sensor 102, the base 106, the first fin 108a, and the second fin 108b, respectively, from Figure 1 The reference directions and axes correspond to the view shown in Figure 3 It will be appreciated that the illustrated images can not be to scale, and embodiments with different relative dimensions are contemplated.

[0194] In the illustrated embodiment, the softer portion 314 is located in the middle of the varying base 306 (the middle of the varying base 306 on the lateral axis 131), and the first and second harder portions 310 and 312 of the varying base 306 are located on the sides of the varying base 306 near where the varying base 306 is coupled to the pipe. It will be appreciated that in various embodiments, the transition between the softer portion 314 and the harder portions 310 and 312 can be smooth in terms of increasing hardness from the middle of the varying base 306 to the edge of each of the first and second sides of the varying base 306, or the transition can occur in steps as the hardness of the block increases from the middle of the varying base 306 to the edge of each of the first and second sides of the varying base. In embodiments, the difference in softness and hardness can be facilitated by making the softer portion thinner and the harder portions thicker, possibly by cutting away a portion of the base 106 or forming the base 106 as a varying base 306 with varying thicknesses. In another embodiment, the difference in softness and hardness can be changed by using different materials or alloys along the lateral axis 131 that are harder in the harder portions 310 and 312 and softer in the softer portion 314. The balancing rib 118 can be connected to the varying base 306 in the middle of the lateral axis 131 of the varying base 306, the length of the balancing rib 118 being along or substantially along the flow axis 141 (not visible in this figure in the plane of the lateral axis 131 and the longitudinal axis 151).

[0195] As depicted in the figures, the softer portion 314 can represent an area around the balancing rib 118 as the balancing rib 118 is coupled to the varying base 306. It can be appreciated that in the absence of the balancing rib 118, 314 does not necessarily represent a separate softer portion as depicted in the figures (the balancing rib 118 can increase rigidity when coupled to the sensor 302). In embodiments, the portion of the varying base 306 between the two fins 108a and 108b (along the transverse axis 131) can be softer than the portion of the varying base 306 between each of the fins 108a and 108b and the edge of the varying base 306 (on the transverse axis 131). In embodiments, the softer portion 314 and the harder portions 310 and 312 can be formed by coupling at least one of the fins 108a and 108b closer to the edge of the varying base 306 on the transverse axis 131 than to the balancing rib 118.

[0196] Embodiments are contemplated in which the varying base 306 does not have a balancing rib 118 and embodiments in which the fin sensor 102 has a balancing rib 118 without the varying base 306. For example, embodiments can have a uniform base 106 in terms of isolation properties, such that the thickness and material are uniform (with any variability in the plate due to coupling to the environment, such as the pipe 110), and still can have a balancing rib 118. In this embodiment, the base 106 can be a uniform thin plate.

[0197] In embodiments, the base 106 is a substantially flat member having thin edges relative to the surface area of the two opposing surfaces. One of the two surfaces can be characterized as the immersion side 342 surface, and the side opposite the immersion side 342 surface can be referred to as the outside 344 surface. The immersion side 342 represents the side of the base 106 on which a portion of the fins 108a and 108b and / or the base 106 are exposed to the flowing fluid to be measured. The outside 344 represents the side of the base 106 on which the fin protrusions 114a and 114b can be located and possibly coupled to the transducer.

[0198] In embodiments, the fin tabs 114a and 114b can have segments that can each protrude through holes in the base 106 when the fin sensor 302 is assembled. In embodiments, the transducers 104a-c can be coupled to the fin tabs 114a and 114b. The fin tabs 114a and 114b can have different segments for coupling the transducers. For example, in embodiments, each of 114a and 114b can have three segments that can have complementary faces opposite each other between the fin tabs 114a and 114b. Each of the transducers 104a-c can be coupled to one of the corresponding segments of the fin tabs 114a and 114b (the corresponding segments can face each other on the transverse axis 131). In this embodiment, the three transducers 104a-c can be aligned with each other on the flow axis 141 (at least when the fin sensor 102 is not in operation). In this embodiment, the transducers 104a-c can be coupled to the fins 108a and 108b at locations on the outer side 344 of the base 106.

[0199] Figure 4 A block diagram of an embodiment of a computer system 400 is shown. In embodiments, the computer system 400 can be an instrument electronics, such as the instrument electronics 112. In various embodiments, the computer system 400 can be constructed from an application specific integrated circuit, or can have discrete processor elements and memory elements for processing commands from and storing data on the memory elements. The computer system 400 can be a stand-alone physical system, a virtual machine, and / or can be established in a cloud computing environment.

[0200] The computer system can have a processor 410, a memory 420, an input / output 430, and a communication coupler 440. The memory 420 can store and / or can have integrated circuits representing, for example, a drive module 422, a signal module 424, and a processing module 426. In various embodiments, the computer system 400 can have other computer elements integrated into or in communication with the computer elements, such as a bus, other communication protocols, etc., in addition to or instead of the computer elements.

[0201] The processor 410 is a data processing element. The processor 410 can be any element for processing, such as a central processing unit, an application specific integrated circuit, other integrated circuits, an analog controller, a graphics processing unit, a field programmable gate array, any combination of these or other common processing elements, etc. The processor 410 can have a cache memory for storing processing data. The processor 410 can benefit from the methods in this specification because the methods can improve the solution of computations and reduce the error of those computations using the proposed inventive structures.

[0202] Memory 420 is a device for electronic storage. Memory 420 can be any non-transitory storage medium and can include one, some, or all of the following: a hard drive, a solid state drive, volatile memory, an integrated circuit, a field programmable gate array, random access memory, read only memory, dynamic random access memory, erasable programmable read only memory, electrically erasable programmable read only memory, cache memory, etc. Processor 410 can execute commands from memory 420 and utilize data stored in memory 420.

[0203] Computer system 400 can be configured to store any data to be used by drive module 422, signal module 424, and / or processing module 426, and can store in memory 420 any amount of historical data representative of any parameters received or used by drive module 422, signal module 424, and / or processing module 426. Computer system 400 can also store in memory 420 any data representative of determinations of any intermediates, possibly with a timestamp representative of when the data was acquired or determined. While drive module 422, signal module 424, and processing module 426 are shown as three independent and discrete modules, the present description contemplates any number (even the specified one or three) and variety of modules working in concert to implement the methods expressed in the present description.

[0204] Drive module 422 is a module that sends drive signals to a transducer (e.g., drive transducer 104b) of a sensor assembly to vibrate an element of the sensor assembly. Drive module 422 can be configured to send data representative of commands to drive in a variety of different modes. For example, drive module 422 can be configured to send data representative of commands to drive in an IP mode and / or an OOP mode. Figure 1

[0205] Signal module 424 is a module that receives sensor data (e.g., data representative of phase differences, time delays, and / or frequency responses). In fin sensor 102, signal module 424 can receive frequency data from upstream transducer 104a and downstream transducer 104c. A phase difference or time delay between frequencies represented by the frequency data of upstream transducer 104a and downstream transducer 104c is determined.

[0206] ​The processing module 426 is a module that determines behavior of the fin sensor 102 and / or outputs data related to the fin sensor 102. The processing module 426 can determine a flow characteristic from data received by the signal module 424. For example, the processing module 426 can use phase difference or time delay data to calculate a flow fluid mass flow rate using methods known in the art. In embodiments, the processing module 426 can use a drive signal from the drive module 422 as the signal from which the time delay or phase difference is derived (when compared to another transducer signal). The processing module 426 can also derive a flow fluid density from frequency data received by the signal module 424. The processing module 426 can also derive a flow fluid viscosity from frequency and / or phase data received by the signal module 424.

[0207] The processing module 426 can also be configured to determine a mode and / or frequency at which to drive the driver, possibly to achieve one or more of a desired frequency or phase difference through a feedback loop that drives the closed or open loop. After determining a data command representing a drive mode to be driven, the processing module 426 can send the command to the drive module 422 to send a command to drive the drive circuit (e.g., to drive the transducer 104b).

[0208] The capabilities of the drive module 422, the signal module 424, and the processing module 426 are considered with respect to the presented flowcharts, and reflect the methods performed in the presented flowcharts. All methods in this specification are considered with respect to each flowchart and flowchart description, and for purposes of complying with any method claims of this specification, all methods and capabilities of the drive module 422, the signal module 424, and the processing module 426 are considered in the order of the presented steps and in any other order that would be meaningful to one of ordinary skill in the art in the context of this specification.

[0209] The input / output 430 is a device for communicatively coupling the computer system 400 to external elements. The input / output 430 can connect the computer system 400 to external elements using known technologies (e.g., universal serial bus, ProLink, serial communication, serial advanced technology attachment, etc.). The input / output 430 can have a communication coupler 440. The communication coupler 440 is used to couple the computer system 400 with components external to the computer system 400, such as with external computing devices, sensors, transducers (e.g., the transducers 104a-c), other sensor assemblies, etc.

[0210] Flowchart

[0211] Figures 5 to 9Flowcharts showing embodiments of methods for manufacturing and using fin coupler assemblies, balance base assemblies, and combined fin coupler and balance base assemblies are shown. The methods disclosed in the flowcharts are not exhaustive and only present potential embodiments of steps and order. These methods must be interpreted in the context of the entire specification, including the description of elements disclosed in Figures 1 to 4 , including, for example, base 106 (e.g., varying base 306), fins 108a and 108b, balance rib 118, and fin coupler 120a and 120b.

[0212] Figure 5 A flowchart showing an embodiment of a method 500 of using a fin coupler assembly using fin sensor 102 is shown. The method steps of method 500 are presented using embodiments that include references to elements presented in other figures and descriptions of other figures. All capabilities, configurations, relative couplings, and positioning of these elements disclosed in other figures and descriptions of other figures are considered in performing these steps.

[0213] Step 502 determines, by processing module 426, data representing a first vibration to be driven by drive transducer 104b. In embodiments, the first drive by drive transducer 104b can be one or more of an IP mode and an OOP mode. In embodiments, the out of phase mode is a mode in which the frequencies of the vibrations of fins 108a and 108b are spaced 180° apart. Processing module 426 can itself send the data representing the first vibration to the driver (e.g., drive transducer 104b), or can send via drive module 422.

[0214] Step 504 vibrates, by drive transducer 104b, based on the data representing the first vibration to be driven.

[0215] Step 506 at least partially restricts movement of the first fin 108a relative to the second fin 108b by coupling the first fin 108a to the at least one fin coupler 120a and / or 120b of the second fin 108b. In embodiments, the at least partial restriction can restrict movement of a free edge 199 of the first fin 108a relative to a free edge 199 of the second fin 108b. In embodiments, the at least partial restriction includes restricting movement of the first fin 108a relative to the second fin 108b at any location where the at least one fin coupler 120a and / or 120b is coupled to the first fin. In embodiments, the at least one fin coupler 120a and / or 120b does not directly restrict movement of any element of the base 106, the at least one fin coupler 120a and / or 120b is not coupled to or an element of the base 106. In embodiments, the at least one fin coupler 120a and / or 120b does not directly restrict movement of any element of the transducers 104a-c, the at least one fin coupler 120a and / or 120b is not coupled to or an element of the transducers 104a-c. All coupling methods, configurations, and alternative arrangements of the fins 108a and 108b and the fin couplers 120a and 120b are contemplated for this step.

[0216] Step 508 optionally receives data representative of the at least one sensor signal by the signal module 424 or the processing module 426. In embodiments where the signal module 424 receives data representative of the at least one sensor signal, the signal module 424 can communicate this information or processed output derived from the data representative of the at least one signal from the signal module to the processing module 426.

[0217] Step 510 optionally determines a flow fluid property, such as mass flow rate and / or density, by the processing module 426.

[0218] In embodiments, Figure 5 Each of the steps of the illustrated method are distinct steps. In another embodiment, steps 502-512 can not be distinct steps, although they are depicted as such in Figure 5 Figure 5 The illustrated method can not have all of the above steps and / or can have other steps in addition to or instead of the above listed steps. Figure 5 The steps of the illustrated method can be performed in another order. The above are Figure 5 ​A subset of the steps listed for part of the method shown can be used to form their own method. The steps of method 500 can be repeated in any combination and order any number of times, for example, in a continuous loop in order to maintain monitoring.

[0219] Figure 6 A flowchart of an embodiment of a method 600 of using the fin sensor 102 balanced pedestal assembly is shown. The method steps of method 600 are presented using embodiments that include references to elements presented in other drawings and descriptions of other drawings. All capabilities, configurations, relative couplings and positioning of these elements disclosed in other drawings and descriptions of other drawings are considered for purposes of performing these steps.

[0220] Step 602 drives the motion of the fins 108a and 108b by driving the transducer 104b.

[0221] Step 604 limits movement of the base 106 in response to the driving by the balancing ribs 118. In embodiments, the balancing ribs 118 can limit movement of the base 106 along a middle or substantially middle portion of the base 106, the middle being defined as the middle of the transverse axis 131. Step 604 can result in the following movement of the fins 108a and 108b: no net movement in a direction from the center of the pipe through the middle of the sensor assembly, thereby providing balance and not moving the sensor assembly relative to the support structure to which the fin sensor 102 is coupled. In embodiments, this can not provide net movement of the fins 108a and / or 108b and / or the fin sensor 102 in a direction from the center of the pipe through the middle of the base 106, possibly defined as along the longitudinal axis 151. It can be appreciated that in some embodiments, the fins 108a and 108b of the fin sensor 102 can rotate about respective center points of the fins 108a and 108b. In embodiments, the balancing ribs 118 at least partially limit movement of the base 106 along a middle portion of the base 106 on the longitudinal axis 151, the middle portion being the portion defined by the middle of the transverse axis 131. In embodiments, the balancing ribs 118 at least partially limit the base 106 on the transverse axis 131 at a position between where the first fin 108a is or will be coupled on the base 106 and a different position where the second fin 108b is or will be coupled on the base 106. In embodiments, the balancing ribs 118 can at least partially limit movement of the base 106 at a position on the transverse axis 131 equidistant from the position of the first fin 108a and the different position of the second fin 108b. In embodiments, the balancing ribs 118 can at least partially limit movement of the base 106 at least along a linear portion of the base 106 parallel to the flow axis 141. In embodiments, the balancing ribs 118 can at least partially limit movement of the base 106 such that movement of one or more of the downstream 145 end of the base 106 and the upstream 143 end of the base 106 is limited less than the middle of the base 106, the middle of the base 106 being the middle of the base 106 on the flow axis 141. Alternatively, the balancing ribs 118 can at least partially limit movement of the base 106 such that movement of one or more of the downstream 145 end of the base 106 and the upstream 143 end of the base 106 is limited more than the middle of the base 106, the middle of the base 106 being the middle of the base 106 on the flow axis 141.

[0222] In embodiments, Figure 6 Each of the steps in the illustrated method is a different step. In another embodiment, although depicted as different steps in Figure 6 Steps 602-604 can not be different steps. In other embodiments, Figure 6The illustrated method can not have all of the above steps and / or can have other steps in addition to or instead of the above-listed steps. Figure 6 The steps of the illustrated method can be performed in another order. The above as Figure 6 A subset of the steps listed as part of the illustrated method can be used to form their own method. The steps of method 600 can be repeated in any combination and order any number of times, for example, can be looped continuously in order to maintain monitoring.

[0223] Figure 7 A flowchart illustrating an embodiment of a method 700 of manufacturing a fin coupler assembly of a fin sensor 102 is shown. The method steps of method 700 are presented using embodiments that include references to elements presented in other drawings and descriptions of other drawings. All capabilities, configurations, relative couplings, and positioning of these elements disclosed in other drawings and descriptions of other drawings are considered for purposes of performing these steps. In embodiments, the fin coupler assembly can be combined with a base 106 (e.g., a varying base 306) and / or a balance rib 118 to form a combined balance base and fin coupler assembly. In embodiments, the fin coupler assembly can be a component of a fin sensor 102.

[0224] Step 702 optionally forms a first fin 108a and a second fin 108b. Manufacturing methods for forming these components can be any suitable manufacturing technique known in the art, for example, molding, extruding, and other methods and / or any combination of these methods. The fin coupler can be formed from, for example, metal or composite material, and can be formed by, for example, additive (3D printing) manufacturing, machining from a solid block, machining of parts, and assembly using any one or any combination of fasteners, adhesives, welds, brazing, etc.

[0225] Step 704 forms at least one fin coupler (e.g., first fin coupler 120a and second fin coupler 120b). Manufacturing methods for manufacturing components such as fin couplers, e.g., molding, extruding, and other methods, are well known in the art. Fin couplers can be formed from, for example, metal, plastic, or other composite materials. At least one fin coupler can be formed in a variety of shapes, e.g., as a rod, a strip, or a strut. In embodiments, at least one fin coupler can be formed as a single piece with fins 108a and 108b, thereby eliminating the need for a separate step (as in step 702) of forming fins 108a and 108b and / or a separate step of coupling at least one fin coupler to fins 108a and 108b. In embodiments, at least one fin coupler can be formed to have one or more coupling elements configured to more easily and / or more effectively couple at least one fin coupler to fins 108a and 108b, e.g., at one or both ends of at least one fin coupler. In another embodiment, one or more of fins 108a and 108b can be formed to have a coupling element to more easily and / or more effectively couple at least one fin coupler to fins 108a and 108b. In yet another embodiment, both at least one fin coupler and fins 108a and 108b can each have a respective or complementary coupling element to couple at least one fin coupler to fins 108a and 108b. In embodiments, at least one fin coupler can be two, three, four, five, six, or any other number of fin couplers. In embodiments, one or more of at least one fin 108a and / or 108b and at least one fin coupler 120a and / or 120b can be formed to have a coupling element configured to facilitate coupling between at least one fin 108a and / or 108b and at least one fin coupler 120a and / or 120b.

[0226] Step 706 couples at least one fin coupler to the first fin 108a and the second fin 108b. In embodiments where one or more of the fins 108a and 108b and the at least one fin coupler have coupling elements, the at least one fin coupler and the fins 108a and 108b can be coupled at and / or by the coupling elements. Any method of coupling is contemplated, for example, welding, brazing, 3D printing, soldering, adhesive bonding, plastic molding or melting, complementary physical or mechanical connectors (e.g., screws), fitting in a groove, and / or the like. In embodiments, the fin coupler 120a is coupled to the fin 108a at a position closer to the free edge 199 of the fin 108a than to an edge of the fin 108a that is or will be coupled to the base 106. In embodiments, two fin couplers 120a and 120b are coupled to the fins 108a and 108b. In this embodiment, the first fin coupler 120a can be coupled at at least one position that is or will be a different point along the flow axis 141 from which the second fin coupler 120b can be coupled.

[0227] Step 708 optionally configures the meter electronics 112 to store and / or execute one or more of the drive module 422, the signal module 424, and / or the processing module 426.

[0228] Step 710 optionally couples the fins 108a and 108b to the base 106. In embodiments, the fins 108a and 108b protrude through holes in the base 106 such that the fins 108a and 108b have an immersed portion configured to be immersed in a fluid flow and fin protrusions 114a and 114b protruding from a side of the base 106 opposite the immersed portion.

[0229] In embodiments, Figure 7 Each of the steps of the illustrated method is a different step. In another embodiment, although depicted as different steps in Figure 7 Steps 702-710 can not be different steps. In other embodiments, Figure 7 The illustrated method can not have all of the above steps and / or can have other steps in addition to or instead of the above-listed steps. Figure 7 The steps of the illustrated method can be performed in another order. The steps listed above as Figure 7 A subset of the steps listed above as part of the illustrated method can be used to form their own method. The steps of the method 700 can be repeated in any combination and order any number of times, for example, can be looped continuously so as to remain on monitor.

[0230] Figure 8A flowchart showing an embodiment of a method 800 of manufacturing a balance base assembly of a fin sensor 102. The method steps of the method 800 are presented using embodiments that include reference to elements presented in other drawings and descriptions of other drawings. All capabilities, configurations, relative couplings and positioning of these elements disclosed in other drawings and descriptions of other drawings are considered for purposes of performing these steps. In embodiments, the balance base assembly can be manufactured with one or more fin couplers 120a and / or 120b so as to make a combined balance base and fin coupler assembly. In embodiments, the balance base assembly can be a component of the fin sensor 102.

[0231] Step 802 optionally forms the transducers 104a-c, the first fin 108a and the second fin 108b, the meter electronics 112, the balance rib 118, the base coupler 116, and the first fin coupler 120a and the second fin coupler 120b. Manufacturing methods for forming these components are established in the art, e.g., 3D printing, molding, coupling separately formed components, etc.

[0232] Step 804 forms at least one base 106. The base 106 can be a flat or substantially flat member that has a small thickness relative to the area of its larger surface. In embodiments, the base 106 can be formed thin and / or can be formed with varying or uniform stiffness. For example, the base 106 can be formed as a varying base 306 such that the stiffness of the middle of the varying base 306 (as the middle of the transverse axis 131) is lower than the stiffness of the edges (of the varying base 306 on the transverse axis 131). This variation can be achieved by molding such that the varying base 306 is generated thinner (with less material) in the middle (along the transverse axis 131) than the edges (of the varying base 306 on the transverse axis 131) to form the base 106. In another embodiment, the variation can be achieved by removing, possibly by cutting, a portion of the base 106 to make the base 106 a varying base that is thinner (with less material) in the middle (along the transverse axis 131) than the edges (of the varying base 306 on the transverse axis 131). In another embodiment, the base 106 can be composed of different materials along the transverse axis 131 to make the base a varying base 306 such that the middle (along the transverse axis 131) of the varying base 306 is softer than the edges (of the varying base 306 on the transverse axis 131).

[0233] Step 806 forms the balancing rib 118. The balancing rib 118 can be an elongated member and can be manufactured using any standard manufacturing method and can be made of any material known in the art that is sufficient to at least some degree limit the movement of the base 106. In embodiments, if the balancing rib 118 is symmetric about a center line 198 along the longest length of the balancing rib 118 in at least one axis (e.g., symmetric about the center line 198 in the transverse axis 131), the balancing rib 118 can have a center line 198 that represents the center of the longest length. The balancing rib 118 can have a varying thickness about the center line 198 along the length of the center line 198. For example, in embodiments, the thickness of at least one end of the balancing rib 118 about the center line 198 in the transverse axis 131 can be greater than the thickness of the middle portion 197 of the balancing rib about the center line 198 in the transverse axis 131. In another embodiment, the thickness of at least one end of the balancing rib 118 about the center line 198 in the transverse axis 131 can be less than the thickness of the middle portion 197 of the balancing rib about the center line 198 in the transverse axis 131.

[0234] Step 808 couples the balancing rib 118 to the base 106. The balancing rib 118 can be coupled to the base at a middle location of the base in the transverse axis 131, the balancing rib can have an elongated portion along or substantially along the flow axis 141. In embodiments where the base 106 has or will have fins 108a and 108b coupled to the base 106, the balancing rib 118 can be coupled to the base 106 between the coupled fins 108a and 108b, possibly coupled between the fins 108a and 108b along the transverse axis 131, and possibly coupled equidistant from the location for coupling or coupled to the first fin 108a and the different location for coupling or coupled to the second fin 108b along the transverse axis 131. The assembly formed when the balancing rib 118 is coupled to the base 106 (or the varying base 306) can be considered a balanced base assembly of the fin sensor 102. In embodiments, the balancing rib 118 can be coupled to the fin sensor 102 such that the center line 198 is parallel or substantially parallel to the flow axis 141. In embodiments, the balancing rib 118 can have a uniform thickness about the center line 198 along the flow axis 141. In another embodiment, the balancing rib 118 can have a varying thickness in the transverse axis 131 about the center line 198 along the flow axis 141. For example, in embodiments, the thickness of at least one end of the balancing rib 118 about the center line 198 in the transverse axis 131 can be greater than the thickness of the middle portion 197 of the balancing rib about the center line 198 in the transverse axis 131. For example, in embodiments, the thickness of at least one end of the balancing rib 118 about the center line 198 in the transverse axis 131 can be less than the thickness of the middle portion 197 of the balancing rib about the center line 198 in the transverse axis 131.

[0235] Step 810 optionally forms the finned sensor 102 by coupling the balance base assembly to the fins 108a and 108b (possibly with the balance ribs 118 between the fins 108a and 108b on the base 106), the transducers 104a-c, the meter electronics 112, the base coupler 116, and / or the first and second fin couplers 120a and 120b. In an embodiment, the fin tabs 114a and 114b can have segments that can each protrude through a hole in the base 106 when the finned sensor 302 is assembled. In an embodiment, the transducers 104a-c can be coupled to the fin tabs 114a and 114b. The fin tabs 114a and 114b can have different segments for coupling the transducers. For example, in an embodiment, each of the fin tabs 114a and 114b can have three segments that can have complementary faces opposite each other between the fin tabs 114a and 114b. Each of the transducers 104a-c can be coupled to one of the corresponding segments of the fin tabs 114a and 114b (the corresponding segments can face each other on the transverse axis 131). In this embodiment, the three transducers 104a-c can be aligned with each other on the flow axis 141 (at least when the finned sensor 102 is not operating). In this embodiment, the transducers 104a-c can be coupled to the fins 108a and 108b at a location on a side of the base 106 opposite a side of the base 106 having the portion of the fins 108a and 108b immersed. The meter electronics 112 can be coupled to the base 106 or the fins 108a and 108b, and possibly on the outside 344 of the base 106.

[0236] In an embodiment, Figure 8 Each of the steps of the illustrated method is a different step. In another embodiment, although depicted as different steps in Figure 8 , steps 802-810 can not be different steps. In other embodiments, Figure 8 The illustrated method can not have all of the above steps and / or can have other steps in addition to or instead of the above-listed steps. Figure 8 The steps of the illustrated method can be performed in another order. The steps listed above as Figure 8 A subset of the steps listed above as part of the illustrated method can be used to form their own method. The steps of the method 800 can be repeated in any combination and order any number of times, for example, can be looped continuously in order to maintain monitoring.

[0237] Figure 9A flowchart showing an embodiment of a method 900 of manufacturing a balance base and fin coupler assembly of a fin sensor 102. The method steps of the method 900 are presented using embodiments that include references to elements presented in other drawings and descriptions of other drawings. All capabilities, configurations, relative couplings and positioning of these elements disclosed in other drawings and descriptions of other drawings are considered for purposes of performing these steps. In embodiments, the balance base assembly can be a component of the fin sensor 102.

[0238] Step 902 optionally forms the transducers 104a-c, the first fin 108a and the second fin 108b, the meter electronics 112, the base coupler 116, and the first fin coupler 120a and the second fin coupler 120b. Manufacturing methods for forming these components are established in the art, e.g., 3D printing, molding, coupling separately formed components, etc.

[0239] Step 904 forms at least one base 106. The base 106 can be a flat or substantially flat member that has a small thickness relative to the area of its larger surface. In embodiments, the base 106 can be formed thin and / or can be formed to have a varying or uniform hardness. For example, the base 106 can be formed as the varying base 306 such that the middle of the varying base 306 (as the middle of the lateral axis 131) is less hard than the edges (of the varying base 306 on the lateral axis 131). This variation can be achieved by molding such that the varying base 306 is created thinner (with less material) in the middle (along the lateral axis 131) than the edges (of the varying base 306 on the lateral axis 131) to form the base 106. In another embodiment, the variation can be achieved by removing, possibly by cutting, a portion of the base 106 to make the base 106 a varying base that is thinner (with less material) in the middle (along the lateral axis 131) than the edges (of the varying base 306 on the lateral axis 131). In another embodiment, the base 106 can be composed of different materials along the lateral axis 131 to make the base a varying base 306 such that the middle (along the lateral axis 131) of the varying base 306 is softer than the edges (of the varying base 306 on the lateral axis 131).

[0240] Step 906 forms the balancing rib 118. The balancing rib 118 can be an elongated member and can be manufactured using any standard manufacturing method and can be made of any material known in the art that is sufficient to at least some degree limit the movement of the base 106. In embodiments, if the balancing rib 118 is symmetric about a center line 198 along the longest length of the balancing rib 118 in at least one axis (e.g., symmetric about the center line 198 in the transverse axis 131), the balancing rib 118 can have a center line 198 that represents the center of the longest length. The balancing rib 118 can have a varying thickness about the center line 198 along the length of the center line 198. For example, in embodiments, the thickness of at least one end of the balancing rib 118 about the center line 198 in the transverse axis 131 can be greater than the thickness of the middle portion 197 of the balancing rib about the center line 198 in the transverse axis 131. In another embodiment, the thickness of at least one end of the balancing rib 118 about the center line 198 in the transverse axis 131 can be less than the thickness of the middle portion 197 of the balancing rib about the center line 198 in the transverse axis 131.

[0241] Step 908 couples the balancing rib 118 to the base 106. The balancing rib 118 can be coupled to the base at a middle location of the base in the transverse axis 131, which can have an elongated portion along or substantially along the flow axis 141. In embodiments in which the base 106 has or will have fins 108a and 108b coupled to the base 106, the balancing rib 118 can be coupled to the base 106 between the coupled fins 108a and 108b, possibly along the transverse axis 131 between the fins 108a and 108b, and possibly also along the transverse axis 131 equidistant from the location for coupling or coupled to the first fin 108a and the different location for coupling or coupled to the second fin 108b. The assembly formed when the balancing rib 118 is coupled to the base 106 (or the varying base 306) can be considered a balanced base assembly of the fin sensor 102. In embodiments, the balancing rib 118 can be coupled to the fin sensor 102 such that the center line 198 is parallel or substantially parallel to the flow axis 141. In embodiments, the balancing rib 118 can have a uniform thickness about the center line 198 along the flow axis 141. In another embodiment, the balancing rib 118 can have a varying thickness in the transverse axis 131 about the center line 198 along the flow axis 141. For example, in embodiments, the thickness of at least one end of the balancing rib 118 about the center line 198 in the transverse axis 131 can be greater than the thickness of the middle portion 197 of the balancing rib about the center line 198 in the transverse axis 131. For example, in embodiments, the thickness of at least one end of the balancing rib 118 about the center line 198 in the transverse axis 131 can be less than the thickness of the middle portion 197 of the balancing rib about the center line 198 in the transverse axis 131.

[0242] Step 910 forms at least one fin coupler (e.g., first fin coupler 120a and / or second fin coupler 120b). Manufacturing methods for manufacturing components such as fin couplers, e.g., molding, extruding, and other methods, are well known in the art. The fin coupler can be formed of, for example, metal or composite material. The at least one fin coupler can be formed in a variety of shapes, e.g., as a rod, a strip, or a strut. In embodiments, the at least one fin coupler can be formed as a single piece with the fins 108a and 108b, without the need for a separate step to form the fins 108a and 108b (as in step 702) and / or a separate step to couple the at least one fin coupler to the fins 108a and 108b. In embodiments, the at least one fin coupler can be formed to have one or more coupling elements configured to more easily and / or more effectively couple the at least one fin coupler to the fins 108a and 108b (e.g., one or both ends of the at least one fin coupler). In another embodiment, one or more of the fins 108a and 108b can be formed to have a coupling element to more easily and / or more effectively couple the at least one fin coupler to the fins 108a and 108b. In yet another embodiment, both the at least one fin coupler and the fins 108a and 108b can each have a respective or complementary coupling element to couple the at least one fin coupler to the fins 108a and 108b. In embodiments, the at least one fin coupler can be two, three, four, five, six, or any other number of fin couplers.

[0243] Step 912 couples the at least one fin coupler to the first fin 108a and the second fin 108b. In embodiments where one or more of the fins 108a and 108b and the at least one fin coupler have coupling elements, the at least one fin coupler can be coupled to the fins 108a and 108b at and / or through the coupling elements. Any method of coupling is contemplated, e.g., welding, brazing, soldering, adhesive bonding, plastic molding or melting, complementary physical or mechanical connectors, etc.

[0244] Step 914 couples the fins 108a and 108b to the base 106. The fins 108a and 108b can be coupled to the base 106 in any manner, e.g., by molding together, by adhesive bonding, welding, or brazing, and other known methods in the art. In embodiments, the base 106 has holes through which the fin protrusions 114a and 114b can protrude, and the base 106 and the fin protrusions 114a and 114b are coupled by standard coupling methods, such as adhesive bonding, welding, and brazing.

[0245] Step 916 optionally forms the fin sensor 102 by coupling the balancing base assembly to the fins 108a and 108b (possibly with the balancing ribs 118 between the fins 108a and 108b on the base 106), the transducers 104a-c, the meter electronics 112, and / or the base coupler 116. In embodiments, the fin tabs 114a and 114b can have segments that can each protrude through a hole in the base 106 when the fin sensor 302 is assembled. In embodiments, the transducers 104a-c can be coupled to the fin tabs 114a and 114b. The fin tabs 114a and 114b can have different segments for coupling the transducers. For example, in embodiments, each of the fin tabs 114a and 114b can have three segments that can have complementary faces opposite each other between the fin tabs 114a and 114b. Each of the transducers 104a-c can be coupled to one of the corresponding segments of the fin tabs 114a and 114b (the corresponding segments can face each other on the transverse axis 131). In this embodiment, the three transducers 104a-c can be aligned with each other on the flow axis 141 (at least when the fin sensor 102 is not operating). In this embodiment, the transducers 104a-c can be coupled to the fins 108a and 108b at a location on a side of the base 106 opposite a side of the base 106 having the portion in which the fins 108a and 108b are immersed.

[0246] The specification contemplates alternative orders of these steps, including all orders that are reasonable under the necessary order of certain steps. For example, the steps of coupling the fin couplers 120a and 120b to the fins 108a and 108b and coupling the fins 108a and 108b to the base 106 can be performed in any order relative to each other. In addition, the balancing base assembly can be formed before, during, or after the fin coupler assembly is formed.

[0247] In embodiments, Figure 9 Each of the steps of the illustrated method is a distinct step. In another embodiment, although depicted as distinct steps in Figure 9 Steps 902-916 can not be distinct steps. In other embodiments, Figure 9 The illustrated method can not have all of the above steps and / or can have other steps in addition to or instead of the above listed steps. Figure 9 The steps of the illustrated method can be performed in additional orders. The above are Figure 9A subset of the steps listed for part of the method shown can be used to form their own method. The steps of method 900 can be repeated in any combination and order any number of times, for example, can be looped continuously in order to maintain monitoring.

[0248] Comparison

[0249] Figures 10 to 11 A comparison is shown that explains certain effects of embodiments of the features presented by the applicant in this specification.

[0250] Figure 10 A comparison 1000 of embodiments of the fin sensor 102 driven in in-phase (IP) mode and out-of-phase (OOP) mode with and without fin couplers 120a and 120b is shown. The fin sensor 102a and 102b are embodiments of the fin sensor 102 without and with fin couplers 120a and 120b, respectively. The comparison 1000 has a first row 1042, a second row 1044, a first image 1052, a second image 1054, a third image 1056, and a fourth image 1058.

[0251] The first row 1042 is a row representing images of the fin sensor 102a without fin couplers 120a and 120b, the first row 1042 has a first image 1052 and a second image 1054. The first image 1052 shows an embodiment of the fin sensor 102a without fin couplers 120a and 120b driven in in-phase mode. The second image 1054 shows an embodiment of the fin sensor 102a driven in out-of-phase mode. It can be seen that at point 1055, the out-of-phase mode fin shows very little curling, remaining substantially flat. It can be appreciated that there is very little frequency separation between the in-phase mode and the out-of-phase mode, as both are driven with the same force, their response frequencies are close to substantially the same value. The lack of separation between the modes of vibration can result in coupling of the drive mode with the natural mode and a less pure expected excitation shape, which can result in calibration and measurement errors.

[0252] The second row 1044 is a row representing images of the fin sensor 102b with fin couplers 120a and 120b, the second row 1044 having a third image 1056 and a fourth image 1058. The third image 1056 shows an embodiment of the fin sensor 102b with fin couplers 120a and 120b driven in an in-phase mode. The second image 1054 shows an embodiment of the fin sensor 102b with fin couplers 120a and 120b driven in an out-of-phase mode. It can be seen that at point 1059, the out-of-phase mode shows considerable curling, generating greater amplitude, frequency, and phase resolution. This generates considerable frequency separation between the in-phase mode and the out-of-phase mode, as both are driven with the same force, with the fin sensor 102b generating a frequency in the out-of-phase mode that is 20% higher than the frequency generated by the in-phase mode in this embodiment. This frequency separation between the in-phase mode and the out-of-phase mode can at least limit coupling between the in-phase mode and the out-of-phase mode, which potentially allows for better measurement and calibration. The increased curling can allow the fin sensor 102b to better couple the fins to the flowing medium and induce a Coriolis response, which can be similar to a typical Coriolis mass flowmeter.

[0253] Figure 11 A comparison 1100 of embodiments of the fin sensor 102 with and without the balancing rib 118 in an undeformed and deformed position is shown. The fin sensors 102c and 102d are embodiments of the fin sensor 102 with and without the balancing rib 118, respectively. The comparison 1100 has a first row 1142, a second row 1144, a first image 1152, a second image 1154, a third image 1156, and a fourth image 1158.

[0254] The first row 1142 is a row representing images of the fin sensor 102c without the balancing rib 118, the first row 1142 having a first image 1152 and a second image 1154. The first image 1152 shows an embodiment of the fin sensor 102c without the balancing rib 118 in an undeformed position. The second image 1154 shows an embodiment of the fin sensor 102c without the balancing rib 118 in a deformed position. It can be seen that at points 1155a and 1155b, the axis of rotation of the fins 108a and 108b is at the edge of the base 106. It can be appreciated that the resulting motion of the sensor assembly will generate a net motion through the sensor assembly in the direction of the longitudinal axis 151, which induces an imbalance and moves the sensor assembly relative to the support structure to which the fin sensor 102c is coupled.

[0255] The second row 1144 is a row representing images of the fin sensor 102d with the balancing ribs 118, the second row 1144 having a third image 1156 and a fourth image 1158. The third image 1156 shows an embodiment of the fin sensor 102d with the balancing ribs 118 in an undeformed position. The fourth image 1154 shows an embodiment of the fin sensor 102d with the balancing ribs 118 in a deformed position. It can be seen that at points 1159a and 1159b, the axis of rotation of the fins 108a and 108b is at the coupling of the fins 108a and 108b to the base 106. It can be appreciated that the resulting motion of the fins 108a and 108b will not generate net motion on the longitudinal axis 151 through the middle of the sensor assembly, which provides balancing and does not move the sensor assembly relative to the support structure to which the fin sensor 102d is coupled. In embodiments, this can not provide net motion of the fins (or teeth) in the vertical direction. It can be appreciated that in some embodiments, the fins 108a and 108b of the fin sensor 102d can rotate about respective center points of the fins 108a and 108b (at 1159a and 1159b, respectively).

[0256] Figure 12 A comparison 1200 of embodiments of the fin sensor 102 with and without fin couplers 120a and 120b on the outside 344 of the base 106 driven in in-phase (IP) mode and out-of-phase (OOP) mode is shown. The fin sensors 102e and 102f are embodiments of the fin sensor 102 without and with the fin couplers 120a and 120b, respectively. The comparison 1200 has a first row 1242, a second row 1244, a first image 1252, a second image 1254, a third image 1256, and a fourth image 1258.

[0257] The first row 1242 is a row representing images of the fin sensor 102e without the fin couplers 120a and 120b, the first row 1242 having a first image 1252 and a second image 1254. The first image 1252 shows an embodiment of the fin sensor 102a without the fin couplers 120a and 120b driven in in-phase mode. The second image 1254 shows an embodiment of the fin sensor 102a driven in out-of-phase mode. It can be seen that at point 1255, the out-of-phase mode fin shows very little curling, remaining substantially flat. It can be appreciated that there is very little frequency separation between the in-phase mode and the out-of-phase mode, as both are driven with the same force, their response frequencies are close to substantially the same value. The lack of separation between the modes of vibration can result in coupling of the drive mode to the natural mode and a less pure excitation shape than expected, which can result in calibration and measurement errors.

[0258] The second row 1244 is a row representing images of the fin sensor 102b with fin couplers 120a and 120b, the second row 1244 having a third image 1256 and a fourth image 1258. The third image 1256 shows an implementation of the fin sensor 102b with fin couplers 120a and 120b driven in an in-phase mode. The second image 1254 shows an implementation of the fin sensor 102b with fin couplers 120a and 120b driven in an out-of-phase mode. This generates a substantial frequency separation between the in-phase mode and the out-of-phase mode, as both are driven with the same force, with the fin sensor 102b generating a frequency in the out-of-phase mode that is 20% higher than the frequency generated by the in-phase mode in this implementation. This frequency separation between the in-phase mode and the out-of-phase mode can at least limit the coupling between the in-phase mode and the out-of-phase mode, which potentially allows for better measurement and calibration. The increased curl can allow the fin sensor 102b to better couple the fins to the flowing medium and induce a Coriolis response, which can be similar to a typical Coriolis mass flow meter.

[0259] The detailed description of the above implementation is not an exhaustive description of all implementations that the inventors consider to be within the scope of the specification. Indeed, certain elements of the above implementation can be used differently, or eliminated entirely, and such additional implementations fall within the scope and teachings of the specification. It will be apparent to those of ordinary skill in the art that the above-described implementation can be combined in whole or in part with other implementations to create additional implementations, all of which fall within the scope and teachings of the specification. It will be apparent to those of ordinary skill in the art that the above-described implementation can be combined in whole or in part with other implementations to create additional implementations, all of which fall within the scope and teachings of the specification. When using the statement "and / or," it should be interpreted to mean one or more of the elements so conjoined are encompassed by the application.

[0260] Therefore, although specific implementations have been described herein for illustrative purposes, various equivalent modifications are possible within the scope of the specification, as those skilled in the relevant art will recognize. The teachings provided herein can be applied to other methods and devices for determining a vibration response parameter of a vibrating element, not just to the implementations described above and shown in the accompanying drawings. Accordingly, the scope of the above-described implementations should be determined by the appended claims.

Claims

1. A Coriolis mass flow sensor (102) having a vane (108a and 108b), the vane comprising a first vane (108a) and a second vane (108b), the Coriolis mass flow sensor (102) further having at least two transducers (104a and 104b) coupled to the vanes (108a and 108b) and configured to induce a Coriolis response in the vanes, the first vane (108a) being coupled to the second vane (108b) by at least one vane coupler (120a and / or 120b), wherein the Coriolis mass flow sensor (102) further comprises a base (106) coupled to the first vane (108a) and the second vane (108b), wherein, The at least one fin coupler (120a and / or 120b) is used to at least partially limit movement of the first fin (108a) relative to a free edge (199) of the second fin (108b), the free edge (199) defined as a lowermost (155) edge of the fins (108a and 108b) in a direction extending from the base to a longitudinal axis of fluid flow.

2. The Coriolis mass flow sensor (102) of claim 1 wherein, The at least one fin coupler (120a and / or 120b) is a rod fin coupler (220c).

3. The Coriolis mass flow sensor (102) of claim 1 wherein, The at least one fin coupler (120a and / or 120b) is a rod fin coupler (220c).

4. The Coriolis mass flow sensor (102) of claim 1 wherein, The at least one fin coupler (120a and / or 120b) is a rod fin coupler (220c).

5. The Coriolis mass flow sensor (102) of claim 4 wherein, The band fin coupler (220b) has at least one tapered end.

6. The Coriolis mass flow sensor (102) of claim 4 or 5, wherein, The band fin coupler (220b) is tapered such that one or more of an upstream (143) end and a downstream (145) end of the band fin coupler (220b) has a cross-sectional area in a plane defined by a longitudinal axis (151) and a transverse axis (131) that is less than a cross-sectional area of a more central portion of the band fin coupler (220b) along a flow axis (141) in the plane defined by the longitudinal axis (151) and the transverse axis (131).

7. The Coriolis mass flow sensor (102) of claim 4 or 5, the band fin coupler (220b) having a cross-section in a plane defined by a longitudinal axis and a flow axis that is narrower at one or more of an upstream (143) end and a downstream (145) end of the cross-section on the longitudinal axis (151) than at at least one more central portion of the flow axis (141) between the upstream (143) end and the downstream (145) end of the cross-section.

8. The Coriolis mass flow sensor (102) according to any one of claims 1 to 5, wherein, The at least one fin coupler (120a and / or 120b) couples the fins (108a and 108b) at substantially the same location on a corresponding face of the fins (108a and 108b).

9. The Coriolis mass flow sensor (102) according to any one of claims 1 to 5, wherein, The fins are arranged to have the same placement site such that the at least one fin coupler (120a and / or 120b) is parallel to a transverse axis (131) when the fins (108a and 108b) are placed in the same or substantially the same orientation in a plane defined by a flow axis (141) and a longitudinal axis (151).

10. The Coriolis mass flow sensor (102) according to any one of claims 1 to 5, wherein, The at least one fin coupler (120a and / or 120b) is coupled at different locations on each of the fins (108a and 108b).

11. The Coriolis mass flow sensor (102) according to any one of claims 1 to 5, wherein, The at least one fin coupler (120a and / or 120b) is coupled to at least one of the fins (108a and 108b) in a region or projected region of a face of at least one of the fins (108a and 108b) represented by a lower (155) and upstream (143) quadrant portion of at least one of the fins (108a and 108b) on a longitudinal axis (151) and following a flow axis (141).

12. The Coriolis mass flow sensor (102) according to any one of claims 1 to 5, wherein, The at least one fin coupler (120a and / or 120b) is coupled to the at least one of the fins (108a and 108b) in a region or projected region of a face of the at least one of the fins (108a and 108b) represented by a lowermost (155) and upstreammost (143) corner of the at least one of the fins (108a and 108b) on a longitudinal axis (151) and according to a flow axis (141).

13. The Coriolis mass flow sensor (102) of any one of claims 1 to 5, wherein, The at least one fin coupler (120a and / or 120b) is coupled to the at least one of the fins (108a and 108b) in a region or projected region of a face of the at least one of the fins (108a and 108b) represented by a lowermost (155) and upstreammost (143) corner of the at least one of the fins (108a and 108b) on a longitudinal axis (151) and according to a flow axis (141).

14. The Coriolis mass flow sensor (102) of any one of claims 1 to 5, wherein, The at least one fin coupler (120a and / or 120b) is coupled to the at least one of the fins (108a and 108b) in a region or projected region of a face of the at least one of the fins (108a and 108b) represented by a lowermost (155) and upstreammost (143) corner of the at least one of the fins (108a and 108b) on a longitudinal axis (151) and according to a flow axis (141).

15. The Coriolis mass flow sensor (102) of any one of claims 1 to 5, wherein, The at least one fin coupler (120a and / or 120b) is coupled to the at least one of the fins (108a and 108b) in a region or projected region of a face of the at least one of the fins (108a and 108b) represented by a lowermost (155) and upstreammost (143) corner of the at least one of the fins (108a and 108b) on a longitudinal axis (151) and according to a flow axis (141).

16. The Coriolis mass flow sensor (102) of any one of claims 1 to 5, wherein, The at least one fin coupler (120a and / or 120b) is coupled to the at least one of the fins (108a and 108b) in a region or projected region of a face of the at least one of the fins (108a and 108b) represented by a lowermost (155) and upstreammost (143) corner of the at least one of the fins (108a and 108b) on a longitudinal axis (151) and according to a flow axis (141).

17. The Coriolis mass flow sensor (102) of any one of claims 1 to 5, wherein, The at least one fin coupler (120a and / or 120b) is coupled to the at least one of the fins (108a and 108b) in a region or projected region of a face of the at least one of the fins (108a and 108b) represented by a lowermost (155) and upstreammost (143) corner of the at least one of the fins (108a and 108b) on a longitudinal axis (151) and according to a flow axis (141).

18. The Coriolis mass flow sensor (102) of any one of claims 1 to 5, wherein, The at least one fin coupler (120a and / or 120b) is coupled to the at least one of the fins (108a and 108b) in a region or projected region of a face of the at least one of the fins (108a and 108b) represented by a lowermost (155) and upstreammost (143) corner of the at least one of the fins (108a and 108b) on a longitudinal axis (151) and according to a flow axis (141).

19. The Coriolis mass flow sensor (102) of any one of claims 1 to 5, wherein, The at least one fin coupler (120a and / or 120b) is coupled to at least one of the fins (108a and 108b) in an area represented by an area or a projected area of a face of at least one of the fins (108a and 108b) defined by an upper (153) third portion and a downstream (145) third portion of at least one of the fins (108a and 108b).

20. The Coriolis mass flow sensor (102) of any one of claims 1 to 5, wherein, The at least one fin coupler (120a and / or 120b) is coupled to at least one of the fins (108a and 108b) in an area represented by an area or a projected area of a face of at least one of the fins (108a and 108b) defined by a lower (155) third portion and an upstream (143) third portion of at least one of the fins (108a and 108b).

21. The Coriolis mass flow sensor (102) of any one of claims 1 to 5, wherein, The at least one fin coupler (120a and / or 120b) is coupled to at least one of the fins (108a and 108b) in an area represented by an area or a projected area of a face of at least one of the fins (108a and 108b) defined by a lower (155) third portion and a downstream (145) third portion on a longitudinal axis (151) of at least one of the fins (108a and 108b).

22. The Coriolis mass flow sensor (102) of any one of claims 1 to 5, wherein, The at least one fin coupler (120a and / or 120b) is coupled to the first fin (108a) and the second fin (108b) in a manner that increases an axial stiffness of an immersion element of the Coriolis mass flow sensor (102).

23. The Coriolis mass flow sensor (102) of any one of claims 1 to 5, wherein, The fins (108a and 108b) have fin projections (114a and 114b) that protrude through holes in the base (106), the at least two transducers (104a and 104b) being coupled to the fins (108a and 108b) at the fin projections (114a and 114b).

24. The Coriolis mass flow sensor (102) of claim 23 wherein, The base (106) has an immersion side (342) and an outer side (344), the fin projections (114a and 114b) protruding through the base (106) to the outer side (344).

25. The Coriolis mass flow sensor (102) of claim 24 wherein, The fin projections (114a and 114b) have corresponding segments, where a corresponding segment is a segment that is at least partially aligned on a transverse axis (131).

26. The Coriolis mass flow sensor (102) of claim 25 wherein, The at least two transducers (104a and 104b) are each coupled to two of the corresponding segments.

27. The Coriolis mass flow sensor (102) of any one of claims 24 to 26, wherein, The at least one fin coupler (120a and / or 120b) is coupled to the fins (108a and 108b) on an outer side of the base (106).

28. The Coriolis mass flow sensor (102) of claim 23 wherein, The at least one fin coupler (120a and / or 120b) is coupled to at least one of the fin projections (114a or 114b).

29. The Coriolis mass flow sensor (102) of claim 25 or 26 wherein, The at least one fin coupler (120a and / or 120b) is coupled to the corresponding segments of at least one fin projection (114a or 114b).

30. The Coriolis mass flow sensor (102) of any one of claims 1 to 5, wherein, The at least one fin coupler (120a and / or 120b) is coupled to the fin (108a and 108b) at a location on the fin (108a and 108b) that is below (155) the coupling between the fin (108a and 108b) and the at least two transducers (104a and 104b).

31. The Coriolis mass flow sensor (102) of any one of claims 24-26, wherein, The at least one fin coupler (120a and / or 120b) is coupled to the fin (108a and 108b) on an outer side (344) of the base (106) at a location closer to the base (106) than the location on the fin (108a and 108b) where the at least two transducers (104a and 104b) are coupled.

32. The Coriolis mass flow sensor (102) of any one of claims 24-26, wherein, The at least one fin coupler (120a and / or 120b) is coupled to the fin (108a and 108b) on the outer side (344) of the base (106) at a location closer to the fin (108a and 108b) than the location where the at least two transducers (104a and 104b) are coupled to the base (106).

33. The Coriolis mass flow sensor (102) of claim 23 wherein, The fin protrusions (114a and 114b) have corresponding segments, where a corresponding segment is a segment that is at least partially aligned on a lateral axis (131).

34. The Coriolis mass flow sensor (102) of claim 33 wherein, The at least two transducers (104a and 104b) are each coupled to two of the corresponding segments.

35. The Coriolis mass flow sensor (102) of any one of claims 1 to 5, the at least one fin coupler (120a and / or 120b) comprises a first fin coupler (120a) and a second fin coupler (120b), the first fin coupler (120a) is coupled to the fin (108a and 108b) at a location upstream of the location where the second fin coupler (120b) is coupled to the fin (108a and 108b).

36. The Coriolis mass flow sensor (102) of any one of claims 1 to 5, wherein, A sense transducer (104a) of the at least two transducers (104a and 104b) is coupled to the fin (108a and 108b) upstream of the location where a drive transducer (104b) of the at least two transducers (104a and 104b) is coupled to the fin (108a and 108b).

37. The Coriolis mass flow sensor (102) of any one of claims 1 to 5, the base (106) is a varying base (306) having a varying stiffness.

38. The Coriolis mass flow sensor (102) of claim 37, the varying base (306) has a softer portion in the middle of the varying base (306) and a harder portion at the edges of the varying base (306), the middle and the edges being the middle and edges of the varying base (306) on a lateral axis (131).

39. The Coriolis mass flow sensor (102) of claim 38, the varying base (306) is thinner in the middle than at the edges.

40. The Coriolis mass flow sensor (102) of claim 39, the varied base (306) having a material composition that varies along a transverse axis (131).

41. The Coriolis mass flow sensor (102) of claim 37, the varied base (306) having softer material in the middle of the varied base (306) and harder material at the edges of the varied base (306) on a transverse axis (131).

42. The Coriolis mass flow sensor (102) of any one of claims 1 to 5, further comprising a balance rib (118) coupled to one or more of the base (106) and a base coupler (116), the balance rib (118) configured to at least partially limit movement of the base (106) along a middle portion of the base (106) on a longitudinal axis (151), the middle portion of the base (106) being a portion defined by a middle of a transverse axis (131), the base coupler (116) being an element that couples the base (106) to an environment in which the Coriolis mass flow sensor (102) is being used.

43. The Coriolis mass flow sensor (102) of any one of claims 1 to 5, further comprising meter electronics (112), one of the at least two transducers (104a and 104b) being a drive transducer (104b), the meter electronics (112) configured to transmit data representative of a command to the drive transducer (104b) to drive the fins (108a and 108b) in one or more of an in-phase (IP) mode and an out-of-phase (OOP) mode.

44. The Coriolis mass flow sensor (102) of claim 43, another of the at least two transducers (104a and 104b) being a sense transducer (104a), the meter electronics (112) receiving signal data from the sense transducer (104a) to maintain a drive mode using a controlled feedback loop.

45. The Coriolis mass flow sensor (102) of any one of claims 1 to 5, wherein, one or more of at least one of the at least one fin coupler (120a and / or 120b) and at least one of the fins (108a and 108b) has a coupling element configured to couple at least one of the at least one fin coupler (120a and / or 120b) to at least one of the fins (108a and 108b) via the coupling element.

46. The Coriolis mass flow sensor (102) of any one of claims 1 to 5, wherein, a first fin coupler (120a) of the at least one fin coupler (120a and / or 120b) has a coupling element and a first fin (108a) has a further coupling element, wherein the coupling element and the further coupling element are complementary such that the coupling element is configured to couple to the further coupling element.

47. The Coriolis mass flow sensor (102) of claim 45 wherein, the coupling element is a groove in the first fin (108a).

48. The Coriolis mass flow sensor (102) of any one of claims 1 to 5, wherein, The at least one fin coupler (120a and / or 120b) is neither an element of the base (106) nor an element of any of the at least two transducers (104a and 104b).

49. The Coriolis mass flow sensor (102) of any one of claims 1 to 5, wherein, The at least one fin coupler (120a and / or 120b) affects movement of the fins (108a and 108b) in a manner different from the manner in which the base (106) affects movement of the fins (108a and 108b) and the manner in which the at least two transducers (104a and 104b) affect movement of the fins (108a and 108b).

50. The Coriolis mass flow sensor (102) of any one of claims 1 to 5, wherein, The at least one fin coupler (120a and / or 120b) is neither coupled to the base (106) nor coupled to any of the at least two transducers (104a and 104b).

51. A method of manufacturing a Coriolis mass flow sensor (102), the method comprising: forming a fin coupler assembly having fins (108a and 108b) and at least one fin coupler (120a and / or 120b), the fins including a first fin (108a) and a second fin (108b); coupling at least two transducers to the fins (108a and 108b) to induce a Coriolis response in the fins; coupling the first fin (108a) to the second fin (108b) by the at least one fin coupler (120a and / or 120b), the method comprising: coupling a base to the first fin (108a) and the second fin (108b); using the at least one fin coupler (120a and / or 120b) to at least partially restrict movement of the first fin (108a) relative to a free edge (199) of the second fin (108b), the free edge (199) defined as a lowermost (155) edge of the fins (108a and 108b) in a direction of a longitudinal axis extending from the base to a fluid.

52. The method of claim 51, wherein, At least one of the fins (108a and 108b) is coupled to the at least one fin coupler (120a and / or 120b) on a portion of the at least one fin coupler (120a and / or 120b) that resides or will reside on an immersion side (342) of the base (106).

53. The method of claim 51, wherein, The base (106) includes an immersion side (342) and an outer side (344), and at least one of the fins (108a and 108b) is coupled to the at least one fin coupler (120a and / or 120b) on a portion of the at least one fin coupler (120a and / or 120b) that resides or will reside on the outer side (344) of the base (106).

54. The method of any one of claims 51-53, further comprising: forming a balance rib (118) and coupling the balance rib (118) to one or more of the base (106) and a base coupler (116), the base coupler (116) being an element that couples the base (106) to an environment in which the Coriolis mass flow sensor (102) is being used.

55. The method of any one of claims 51 to 53, wherein, The base (106) is formed as a varying base (306) having varying stiffness.

56. The method of any one of claims 51 to 53, wherein, The at least one fin coupler (120a and / or 120b) is formed as a rod-shaped fin coupler (220a).

57. The method of any one of claims 51 to 53, wherein, The at least one fin coupler (120a and / or 120b) is formed as a strut (220c).

58. The method of any one of claims 51 to 53, wherein, The at least one fin coupler (120a and / or 120b) is formed as a band-shaped fin coupler (220b).

59. The method of claim 51, further comprising: The base (106) is formed and coupled to the fins (108a and 108b).

60. The method of claim 59, wherein, The fins (108a and 108b) are formed with fin projections (114a and 114b) that protrude through holes in the base (106), at least one transducer (104a and / or 104b) being coupled to the fins (108a and 108b) at the fin projections (114a and 114b).

61. The method of claim 60, wherein, The fin projections (114a and 114b) are formed with corresponding segments, where a corresponding segment is a segment that is at least partially aligned on a lateral axis (131), the at least one fin coupler (120a and / or 120b) being coupled to the fins (108a and 108b) at the corresponding segments.

62. The method of any one of claims 59-61, wherein, The base (106) is formed as a varying base (306) having varying stiffness.

63. The method of claim 62, wherein, The varying base (306) is formed with a middle portion of the varying base (306) being softer than edges of the varying base (306) on a lateral axis (131).

64. The method of claim 63, further comprising: A balance rib (118) is formed and coupled to one or more of the base (106) and a base coupler (116), the base coupler (116) being an element that couples the base (106) to an environment in which the Coriolis mass flow sensor (102) is being used.

65. The method of claim 64, wherein, The at least one fin coupler (120a and / or 120b) is coupled to the fins (108a and 108b) in at least one position of the balance rib (118) on a first direction (133) of the lateral axis (131) and in at least one position of the balance rib (118) on a second direction (135) of the lateral axis (131).

66. The method of any one of claims 51 to 53, further comprising: A meter electronics (112) is formed and communicatively coupled to a transducer (104a and / or 104b and / or 104c), the meter electronics (112) having a processor and a memory, the memory configured to store commands and data for the processor to perform operations; and The meter electronics (112) is configured to drive in in-phase and out-of-phase modes.

67. A method of using a Coriolis mass flow sensor (102) having a drive transducer (104b) that induces Coriolis vibrations in a fin (108a and 108b), the fin including a first fin (108a) and a second fin (108b), the first fin (108a) and the second fin (108b) coupled to a base (106), the Coriolis mass flow sensor (102) having at least one sense transducer (104a) that receives response data, the method comprising: at least partially restricting movement of a free edge (199) of the first fin (108a) relative to a free edge of the second fin (108b) by at least one fin coupler (120a and / or 120b), the free edge (199) defined as a lowermost (155) edge of the fin (108a and 108b) in a longitudinal axis direction extending from the base to a fluid.

68. The method of claim 67, the vibrations driven by the drive transducer (104b) to drive the fins (108a and 108b) in an out of phase (OOP) mode.

69. The method of claim 68, wherein, The out of phase (OOP) mode representing a phase separation of about 180° between movement of the first fin (108a) and the second fin (108b).

70. The method of any one of claims 67-69, wherein, At least partially restricting movement of the first fin (108a) relative to movement of the second fin (108b) by the at least one fin coupler (120a and / or 120b) includes at least partially restricting movement of the first fin (108a) relative to movement of the second fin (108b) at any location where the at least one fin coupler (120a and / or 120b) is coupled to the first fin (108a).

71. The method of any one of claims 67-69, wherein, The at least one fin coupler (120a and / or 120b) does not directly restrict movement of any element of the base (106), the at least one fin coupler (120a and / or 120b) not coupled to nor an element of the base (106).

72. The method of any one of claims 67-69, further comprising: At least partially restricting movement of the base (106) using a balance rib (118).

73. A method of using a Coriolis mass flow sensor (102) having a drive transducer (104b) that drives vibrations in a fin (108a and 108b), the fin including a first fin (108a) and a second fin (108b), the first fin (108a) and the second fin (108b) coupled to a base (106), the Coriolis mass flow sensor (102) having at least one sense transducer (104a) that receives response data, the Coriolis mass flow sensor (102) having a balance rib (118), the method comprising: movement of a free edge of the first fin (108a) relative to a free edge of the second fin (108b) is at least partially restricted by at least one fin coupler (120a and / or 120b), the free edge (199) is defined as a lowermost (155) edge of the fins (108a and 108b) in a direction from the base extending to a longitudinal axis of fluid flow; movement of the base (106) is at least partially restricted by the balance rib (118).

74. The method of claim 73, at least partially restricting movement of the base (106) by the balancing rib (118) comprises: movement of the base (106) along a middle portion of the base (106) in a longitudinal axis (151) is at least partially restricted, the middle portion being a portion defined by a middle of a transverse axis (131).

75. The method of claim 73 or 74, at least partially restricting movement of the base (106) by the balancing rib (118) comprises: net movement of the fins (108a and 108b) in a longitudinal axis (151) is at least partially prevented.

76. The method of claim 75, at least partially restricting movement of the base (106) by the balancing rib (118) comprises: net movement of the Coriolis mass flow sensor (102) in the longitudinal axis (151) is at least partially prevented.

77. The method of claim 73 or 74, at least partially restricting movement of the susceptor (106) comprises: the base (106) is at least partially restricted in position on the base (106) between a position at which the first fin (108a) is coupled or will be coupled and a different position at which the second fin (108b) is coupled or will be coupled on the base (106) in a transverse axis (131).

78. The method of claim 77, at least partially restricting movement of the susceptor (106) comprises: movement of the base (106) is at least partially restricted in position on the transverse axis (131) equidistant from the position and the different position.

79. The method of claim 73 or 74, at least partially restricting movement of the susceptor (106) comprises: movement of the base (106) is at least partially restricted at least along a straight portion of the base (106) parallel to a flow axis (141).

80. The method of claim 79, at least partially restricting movement of the base (106) comprises: movement of the base (106) is at least partially restricted such that movement of one or more of a downstream (145) end of the base (106) and an upstream (143) end of the base (106) is restricted less than a middle of the base (106), the middle of the base (106) being a middle of the base (106) in the flow axis (141).

81. The method of claim 79, at least partially restricting movement of the susceptor (106) comprises: movement of the base (106) is at least partially restricted such that movement of one or more of a downstream (145) end of the base (106) and an upstream (143) end of the base (106) is restricted more than a middle of the base (106), the middle of the base (106) being a middle of the base (106) in the flow axis (141).

Images