Vibrating measurement sensor and vibrating measurement system formed thereby

Abstract

The measuring sensor includes: a receiver module (M1) having a receiver housing (11) containing at least one chamber (11*) at least partially enclosed by a housing wall (11+), and at least one coil (12) placed within the chamber (11*) of the receiver housing and mechanically connected at least indirectly to the housing wall (11+), and a receiver module (M2) inserted into the receiver module (M1) and having at least one tube (21) having a tube wall (21+) forming an outer surface of the tube and having an inner cavity (21*) enclosed by the tube wall, and at least one permanent magnet (22) externally fixed to an intermediate segment of the tube wall. The measuring sensor has virtual reference axes, one of which (z) imaginarily connects the planar cross-sectional region of the intermediate segment including the center point of the flow cross-sections (A1, A2) at the ends of the intermediate segment; one reference axis (x1) coincides with the longitudinal axis of the coil; one reference axis (x2) coincides with the longitudinal axis of the permanent magnet; one reference axis (y1) intersects both reference axes (z) and (x1) at right angles; and one reference axis (y2) intersects both reference axes (z) and (x2) at right angles. The tube wall is shaped such that the guideline (L) of the channel surface of the intermediate segment extends at least partially beyond the virtual first reference plane (yz1) of the measuring sensor defined by the reference axes (z, y1) in the static rest position. In addition, the permanent magnet is attached to the intermediate segment such that, in the static rest position of the tube, the virtual reference plane (xy1) of the measuring sensor spanning the reference axes (x1, y1) is parallel to the virtual reference plane (xy2) of the measuring sensor spanning the reference axes (x2, y2), or the reference planes (xy1, xy2) are imaginarily intersecting each other in the static rest position of the tube, thereby forming a (minimum) intersection angle (α) that does not exceed 1°.

Description

Technical Field

[0001] This invention relates to a vibration-type measuring transducer and a vibration measuring system formed therefrom. Background Technology

[0002] DE-A 40 26 724, WO-A 2019 / 017891 and the applicant’s own unpublished international application PCT / EP2020 / 082922 disclose vibration measurement systems, in particular Coriolis mass flow measurement devices, which are formed by a modularly constructed vibration-type measurement transducer and measurement system electronics electrically connected thereto. The measuring transducer is formed in each case by two transducer modules. The (fixed) first transducer module in each case includes a transducer housing and at least one (first) coil, wherein the transducer housing has at least one chamber at least partially surrounded by a housing wall, the at least one (first) coil is disposed within and mechanically connected to the transducer housing, particularly releasably mechanically connected to it, and wherein the second transducer module in each case includes at least one (first) tube and at least one (first) permanent magnet, wherein the at least one (first) tube has a tube wall forming the outer surface of the tube and an inner cavity surrounded by the tube wall, the at least one (first) permanent magnet is externally fastened to the tube, i.e., fastened to an intermediate segment of the tube wall, particularly by material bonding, wherein the intermediate segment of the tube wall extends between a first segment end on the inlet side and a second segment end on the outlet side, wherein the second segment end is spaced apart from the first segment end. The tube wall can be, for example, metal or plastic. The second transducer module is placed within and releasably mechanically connected to the first transducer module, such that the second transducer module is fixedly positioned within the first transducer module, i.e., cannot move. At least an intermediate segment of the tube is located within a cavity of the transducer housing and is also spaced apart from the housing wall, and wherein the coil and permanent magnet form a solenoid. In the case of the measuring transducer shown in DE-A 40 26 724, WO-A2019 / 017891, or PCT / EP2020 / 082922, at least one tube is mechanically coupled to the transducer housing, particularly via a first connecting segment (inlet side) adjacent to the first segment end of the intermediate segment and a second connecting segment (outlet side) adjacent to the second segment end of the intermediate segment, i.e., rigidly connected at least indirectly to the transducer housing, such that movement of the first and second connecting segments relative to the transducer housing is prevented, and the second transducer module is fixedly positioned within the first transducer module and cannot move. Additionally, the second transducer module can be alternatively formed such that it can be removed from the first transducer module without damage, and in a given case, without the need for tools, for example, it can be removed from the outside of the transducer housing, for example, so that it can be replaced in the field by another example of the second transducer module (in a given case, another example of the second transducer module manufactured after the production and delivery of the first transducer module).

[0003] At least one tube and its intermediate segments may be at least partially straight and / or at least partially curved, such as U-shaped or V-shaped. Furthermore, the at least one tube is configured to convey flowing fluid within its inner cavity, and during this process, particularly for determining measurements representing one or more measured variables of the fluid, the at least one tube is induced to vibrate, causing the intermediate segments to perform oscillating movements about a static rest position. To excite and sustain the forced oscillation of the intermediate segments of the at least one tube, the measuring transducer and the measuring system formed therefrom include an electromechanical exciter device, wherein the exciter device may be formed, for example, by means of an electric coil and a permanent magnet. Additionally, the measuring transducer and the measuring system formed therefrom include an electromechanical sensor device for recording the forced oscillation of the intermediate segments of the at least one tube and for providing one or more oscillation signals representing the oscillation of the intermediate segments. In addition to the first tube, the second transducer module may also have at least one second tube constructed identically to the first tube, and when the second transducer module is mounted in the first transducer module, the at least one second tube is positioned within the transducer housing in the same manner as the first tube and is, in particular, releasably mechanically connected to the transducer housing.

[0004] These measuring transducers inherently have multiple imaginary reference axes. For example, a first reference axis imaginarily connects the midpoint (geometric centroid) of the first cross-sectional area of ​​the intermediate segment, including the flow cross-section at the end of the first segment, to the midpoint of the second cross-sectional area of ​​the intermediate segment, including the flow cross-section at the end of the second segment. A second reference axis coincides with and is defined by the longitudinal axis of the coil. A third reference axis coincides with and is defined by the longitudinal axis of the permanent magnet. Furthermore, a fourth reference axis of the measuring transducer can be defined, which in each case intersects perpendicularly to the first and second reference axes. A fifth reference axis can be defined, which in each case intersects perpendicularly to the first and third reference axes. A sixth reference axis can be defined, which is perpendicular to the third reference axis and the (guideline) of the channel region of the intermediate segment established by the outer surface of the tube. In the aforementioned hypothetical reference axes, furthermore, when the tube is in a static, stationary position, the first and second reference axes define a hypothetical first reference plane of the measuring transducer, the second and fourth reference axes define a hypothetical second reference plane of the measuring transducer, the third and fifth reference axes define a third reference plane of the measuring transducer, and the third and sixth reference axes define a fourth reference plane of the measuring transducer. Typically, in the case of a conventional measuring transducer, the permanent magnet is placed on the intermediate segment, i.e., positioned and oriented such that the (surface) normal of the fourth reference plane and the (surface) normal of the flow cross-section of the intermediate segment are substantially or at least generally parallel to each other, such that the two associated (reference) surfaces are coplanar, wherein the midpoint of the flow cross-section of the intermediate segment corresponds to or coincides with the intersection of the aforementioned sixth reference axis and the directrix.

[0005] Studies of such modular measurement transducers and the measurement systems formed therefrom have shown that the accuracy of the measurement, i.e. the accuracy of determining the measured value of at least one measured variable by a particular example of the measurement system, can sometimes prove to be less than the accuracy of the earlier achieved measurement after the current example of the second transducer module is replaced by a new example of the second transducer module that is nominally equivalent (e.g., also one manufactured only after the manufacture and delivery of the first transducer module), and the accuracy of the measurement system can fluctuate considerably over multiple such replacement cycles. Further research has shown that this fluctuation in measurement accuracy can be attributed in particular to the fact that individual examples of the second transducer module can have correspondingly high variability or dispersion due to unavoidable tolerances in the production of the second transducer module; this is especially true in that the intermediate segment of at least one individual example of the tube differs from the predetermined perfect planar (tube) shape, i.e., the shape with a guideline extending entirely within the first reference plane, such that, as a result, the guideline of the channel surface of the intermediate segment extends partially outside the first reference plane of the measuring transducer, even when the tube is in a static, stationary position, and in a given case, even intersects the first reference plane once or more. In the case of conventional measuring transducers, due to this dispersion in the (tube) shape, the second and third reference planes of the individual measuring transducer (example) can be offset sufficiently parallel to each other, such that the reference planes have different separations on the one hand, and on the other hand, these separations can sometimes be very large, i.e., greater than 1 mm. Alternatively, the second and third reference planes of such a measuring transducer (example) can be rotated sufficiently relative to each other that they sometimes intersect each other at very large angles (i.e., angles greater than 1° in total). Relatedly, the minimum separation between the tube wall and the coil, and thus the (minimum) separation between the coil's face facing the permanent magnet and the permanent magnet's face facing the coil, can, on the one hand, have a significant deviation from a predetermined nominal value, thus exhibiting correspondingly high individual variations, and on the other hand, the separation between the coil and the permanent magnet can sometimes also exhibit relatively high values, thus fluctuating to a relatively high degree. Summary of the Invention

[0006] With this in mind, the object of the present invention is to improve the modular measurement transducer of the aforementioned type so that the vibration measurement system formed therefrom produces constant high-precision measurements, even when the shape of at least one tube varies greatly and thus the second transducer module formed therefrom also varies greatly; this is especially true in the case of a large number of replacement cycles, in which the example of the use of the second transducer module is replaced by a new example of the second transducer module.

[0007] To achieve the above objectives, the present invention relates to a vibration-type measuring transducer, comprising:

[0008] A first transducer module includes a transducer housing having at least one chamber, the at least one chamber being at least partially surrounded by a housing wall, and at least one first coil, for example, a cylindrical first coil, disposed within the chamber of the transducer housing and mechanically connected at least indirectly to the housing wall; and

[0009] A second transducer module includes at least one (first) tube (e.g., at least partially straight and / or at least partially curved), the at least one (first) tube having a tube wall forming the outer surface of the tube, such as a metal or plastic tube wall, and having an inner cavity surrounded by the tube wall, and at least one first permanent magnet (e.g., a cylindrical first permanent magnet) externally fastened to an intermediate segment of the tube wall, the intermediate segment extending between, for example, an inlet-side first segment end and an outlet-side second segment end and connected thereto, for example, by a material bond, the second segment end being spaced apart from the first segment end.

[0010] In the case of the measuring transducer of the present invention, the second transducer module is disposed in the first transducer module and is mechanically and releasably securely connected to the first transducer module such that at least the intermediate segment of the tube is located in the cavity of the transducer housing and is also spaced apart from the housing wall, for example, such that the second transducer module is fixedly disposed in the first transducer module and cannot be moved, and the tube is adapted to convey flowing fluid in its inner cavity, for example, fluid having a predetermined flow direction and / or a flow direction from the end of the first segment to the end of the second segment, and during this period, the tube is induced to vibrate, such that the intermediate segment performs oscillatory movement about a static rest position.

[0011] In addition, the measurement transducer includes multiple hypothetical reference axes, among which,

[0012] The first reference axis imaginarily connects the midpoint of the first cross-sectional region of the plane including the flow cross-section at the end of the first segment of the intermediate segment and the midpoint of the second cross-sectional region of the plane including the flow cross-section at the end of the second segment of the intermediate segment.

[0013] The second reference axis coincides with and is defined by the longitudinal axis of the coil.

[0014] The third reference axis coincides with and is defined by the longitudinal axis of the permanent magnet.

[0015] The fourth reference axis intersects the first reference axis and the second reference axis at right angles in every case, and

[0016] In every case, the fifth reference axis intersects both the first and third reference axes at right angles.

[0017] The tube wall, and thus the tube formed therefrom, is formed such that, particularly due to tolerances in the production of the second transducer module, the guideline of the channel surface of the intermediate segment defined by the outer surface of the tube, for example, is also the guideline imaginarily connecting the midpoints of the first and second cross-sectional regions, extends at least partially beyond the imaginary first reference plane of the measuring transducer defined by the first and fourth reference axes in the static rest position, for example, intersecting the imaginary first reference plane once or more.

[0018] In the case of the measuring transducer of the present invention, the permanent magnet is further placed on the intermediate segment, for example, positioned and oriented such that,

[0019] In the static, stationary position of the tube, the imaginary second reference plane of the measuring transducer, defined by the second and fourth reference axes, is parallel to the imaginary third reference plane of the measuring transducer, defined by the third and fifth reference axes, for example, such that the second and third reference planes have a separation (a) or coincidence (a = 0), the total separation (a) not exceeding 0.5 mm, for example, not exceeding 0.1 mm, or,

[0020] In the static, stationary position of the tube, the second and third reference planes are hypothetically intersecting each other to form a (minimum) intersection angle, which totals no more than 1°, for example, no more than 0.5°.

[0021] Furthermore, the present invention also exists in a vibration measurement system, such as a Coriolis mass flow measurement device, which is formed by such a measurement transducer. The measurement system further includes measurement system electronics, which are releasably electrically connected to at least one coil and adapted to supply power to the coil by an electric drive signal (e.g., an electric drive signal with an applied alternating current) and / or sense the electrical (alternating) voltage of the coil (e.g., a voltage representing the oscillation of an intermediate segment), for example, to evaluate the oscillation of the intermediate segment based on the (alternating) voltage and / or determine the measurement value of at least one measured variable of the fluid flowing in the pipe.

[0022] In a first embodiment of the invention, it is further specified that the second transducer module is alternatively formed such that it can be removed from the first transducer module, for example, without damage, such as from the outside of the transducer housing.

[0023] In a second embodiment of the invention, the measuring transducer is further specified to have a sixth reference axis, which in each case intersects the third reference axis and the directrix at a right angle, and the third and sixth reference axes define an imaginary fourth reference plane for the measuring transducer. Developing this embodiment, the intermediate segment is further specified to have a third cross-sectional region spaced apart from the first segment end and also from the second segment end, and this third cross-sectional region has a (surface) normal (e.g., a (surface) normal that substantially points in the flow direction of the fluid being transported in the pipe) and a flow cross-section (where a point corresponds to or coincides with the intersection of the sixth reference axis and the directrix); this specifically makes the (surface) normal of the third reference axis and the flow cross-section of the third cross-sectional region skewed, for example, the sixth reference axis corresponding to the minimum traverse of the (surface) normal and the third reference axis, and / or makes the flow cross-section of the third cross-sectional region and the fourth reference plane imaginarily intersect each other to form a (minimum) intersection angle other than zero, for example, the (minimum) intersection angle totaling greater than 0.1°.

[0024] In a third embodiment of the invention, the second reference axis and the third reference axis are further specified to be parallel, for example, coincident.

[0025] In a fourth embodiment of the invention, at least one tube is further specified to be rigidly mechanically coupled to the transducer housing via a first connecting segment, for example, on the inlet side, adjacent to the first segment end of the intermediate segment, and via a second connecting segment, for example, on the outlet side, adjacent to the second segment end of the intermediate segment. That is, the at least one tube is connected to the transducer housing such that displacement of the first connecting segment and the second connecting segment relative to the transducer housing is prevented and / or the second transducer module is fixedly disposed within the first transducer module and cannot be moved.

[0026] In a fifth embodiment of the invention, it is further specified that the projection of at least one tube (e.g., its intermediate segment and guideline) on the first reference plane is formed as a U-shape or a V-shape.

[0027] In a sixth embodiment of the invention, the second transducer module further includes at least one second tube, which is constructed equivalently to and / or identically to the first tube, and is placed inside the transducer housing and is mechanically connected to the transducer housing, for example, releasably.

[0028] In a seventh embodiment of the present invention, it is further specified that the electric coil and the permanent magnet form a solenoid.

[0029] In the eighth embodiment of the present invention, it is further specified that the electric coil and the permanent magnet form a plunger coil.

[0030] In a first further development of the invention, the measuring transducer further includes an electromechanical actuator for exciting and maintaining forced oscillations of at least one intermediate segment of the tube. The actuator may be formed, for example, by means of an electric coil and a permanent magnet.

[0031] In a second further development of the invention, the measuring transducer further includes: an electromechanical sensor device for recording forced oscillations of at least one intermediate segment of the tube, and for providing at least one oscillation signal representing the oscillations of the intermediate segment. This sensor device may be formed, for example, by means of an electric coil and a permanent magnet.

[0032] The basic concept of the invention is to mitigate the impairment of the measurement accuracy of the vibration measurement system of the invention caused by the inherently high sample dispersion in the example of at least one tube used to generate a large number of second transducer modules by mounting (i.e., positioning and orienting) at least one permanent magnet (e.g., permanent magnets for each sensor and / or exciter device used to form the final generated modular measurement transducer) on an intermediate segment of the tube, such that the permanent magnet (although the intermediate segment of the example of the tube differs unsystematically and therefore unpredictably from a predetermined (e.g., perfectly planar) (tube) shape) is placed within the prepared measurement system example of the tube relative to its coil in the first transducer module. The final installation position at the predetermined location and orientation; this in particular makes the (fourth) reference plane of the measuring transducer, defined by the longitudinal axis of the permanent magnet and the (sixth) reference axis which intersects perpendicularly with the guideline of the channel surface of the intermediate segment, and the cross-sectional area at the intersection of the (sixth) reference axis and the guideline of the intermediate segment at the midpoint of the intermediate segment are neither coplanar nor parallel, but rather, on the contrary, imaginarily intersect each other to form a (minimum) intersection angle that is significantly different from zero, i.e., the (minimum) intersection angle is greater than 0.1° in total, and the (surface) normal of such cross-sectional area and the (fourth) reference plane of the measuring transducer are skewed. In addition, the present invention is based on the surprising realization that, in the case of a prepared measuring transducer (example), the separation established between the coil's face facing the permanent magnet and the permanent magnet's face facing the coil provides, on the one hand, a very high contribution to the accuracy of the measurement achievable using the measuring system, and on the other hand, although this separation impairs the simple positioning and orientation of the permanent magnet in the case of conventional measuring transducers in the manner described above, this separation can be checked and set very precisely during the manufacture of modular measuring transducers with relatively little additional work. Due to this relative ease of implementation, slightly different positioning of the permanent magnet, a considerable improvement in measurement accuracy, and a consistently high level of measurement accuracy can be achieved in the case of vibration measuring systems of the type discussed, even over numerous replacement cycles of the aforementioned type.

[0033] The invention and its advantageous embodiments will now be explained in more detail based on examples of embodiments shown in the accompanying drawings. Components with equivalent or equivalent functions are provided with equivalent reference numerals throughout the drawings; reference numerals already shown in previous drawings are omitted in subsequent drawings when clarity is required or when it is otherwise reasonable. Furthermore, other advantageous embodiments or further developments of the invention can be derived from the figures and / or from the claims themselves, particularly combinations of aspects of the invention that have been explained individually only initially. Attached Figure Description

[0034] The figures in the attached diagram are shown below:

[0035] Figure 1a A modular vibration measurement transducer is schematically shown in a perspective, partially transparent side view, i.e., a measurement transducer formed by two transducer modules, and is particularly intended for use in forming a vibration measurement system;

[0036] Figure 1b A variant of the modular vibration-type measurement transducer is schematically shown in a perspective side view;

[0037] Figure 2 and Figure 3 A perspective side view schematically illustrates the suitability for forming Figure 1a and Figure 1b The first and second transducer modules of the measurement transducer; and

[0038] Figure 4 , Figure 5 and Figure 6 It is a schematic and partial cut used to form Figure 1. Figure 2 and Figure 3 A side view showing details of the first and second transducer modules. Detailed Implementation

[0039] exist Figure 1a and Figure 1b An example of an embodiment of a vibration-type measurement transducer is shown in the figure.

[0040] These measurement transducers are constructed in a modular fashion, such that they include a first transducer module M1 and a second transducer module M2.

[0041] The transducer module M1 of the measuring transducer of the present invention includes a transducer housing 11 having at least one chamber 11*, which is at least partially surrounded by a housing wall 11+, and at least one first coil 12, for example, a substantially cylindrical coil, which is disposed within the chamber 11* and is at least indirectly mechanically connected to the housing wall 11+. The transducer module M2, in turn, includes at least, for example, a (first) tube 21 that is at least partially straight and / or at least partially curved, and at least, for example, a substantially cylindrical first permanent magnet 22. For example, the substantially U-shaped or V-shaped tube 21 includes a tube wall 21+, for example, made of metal or plastic, forming the outer surface of the tube 21, and an inner cavity 21* surrounded by the tube wall 21+. In addition, the permanent magnet 22 is externally fastened to the intermediate segment 21a of the tube wall by means of material bonding, for example, the intermediate segment 21a extending between the first segment end on the inlet side and the second segment end on the outlet side, the second segment end being spaced apart from the first segment end.

[0042] like Figure 1a As shown, or from Figure 1a , Figure 1b , Figure 2 and Figure 3 The combination is directly obvious. In the case of a prepared measuring transducer, transducer module M2 is disposed in transducer module M1 and is mechanically and releasably securely connected to transducer module M1 such that at least the intermediate segment 21a of the tube is located in the cavity of transducer housing 11, and is also spaced apart from its housing wall 11+; this in particular makes transducer module M2 fixedly disposed in transducer module M1 and cannot be moved, and / or makes the coil 12 and the permanent magnet 22 form a solenoid or plunger coil. In another embodiment, transducer modules M1 and M2 are configured such that, in the final installation position where transducer module M2 is arranged and fixed in transducer module M1, at least one tube is mechanically coupled to the transducer housing via a first segment end adjacent to the intermediate segment (here, the inlet side - first connecting segment 21b) and via a second segment end adjacent to the intermediate segment (here, the outlet side - second connecting segment 21c); this in particular makes the at least one tube rigidly connected to the transducer housing 11, thus preventing displacement of the connecting segments 21b and 21c relative to the transducer housing 11, or making the transducer module M2 fixedly disposed within the transducer module M1 and immobile. In another embodiment of the invention, the transducer module M2 is additionally and alternatively formed such that (after its installation in the transducer module M1) it can be removed from the transducer module M1; this in particular makes it possible to remove it from the transducer housing 11 or from the transducer module M1 formed therefrom without damaging the transducer housing 11, and / or from the outside of the transducer housing 11, such as... Figure 1bAs shown, in the given circumstances, (assembly / disassembly) tools are not applied, for example, to replace in the field with another example of the second transducer module (M2*), which in the given circumstances is even a second transducer module produced after the production and delivery of transducer module M1.

[0043] Furthermore, the tube 21 of the measuring transducer of the present invention is adapted to convey fluid flow within its inner cavity, for example, fluid flow having a predetermined flow direction and / or guided from the first segment end to the second segment end, and during this period, the tube 21 is induced to vibrate, causing the intermediate segment 21a to perform oscillatory movement from a static rest position (here defined by the mounting position of the transducer module M2 within the transducer module M1). Therefore, in an additional embodiment of the invention, the measuring transducer further includes an electromechanical actuator device for exciting and maintaining forced oscillation of at least one intermediate segment of the tube and / or an electromechanical sensor device for recording the forced oscillation of the at least one intermediate segment of the tube and for providing at least one oscillation signal representing the oscillation of the intermediate segment, wherein the actuator device or sensor device may be formed, for example, by an electric coil 12 and by a permanent magnet 22. Therefore, the measuring transducer of the present invention may also be a component of a vibration measurement system, for example, a Coriolis mass flow measurement device, which, in addition to the measuring transducer, includes, for example, measuring system electronics that are also releasably electrically connected to at least one coil 21 of the device. Measurement system electronics, as is very common in such vibration measurement systems, are adapted to supply power to the coil via an electric drive signal (e.g., an electric drive signal with an applied alternating current) and / or sense the electrical (alternating) voltage of the coil, particularly the voltage representing the oscillation of the intermediate segment; this is especially for evaluating and / or determining the measured value of at least one measured variable of the fluid flowing in tube 21 based on the (alternating) voltage oscillation of the intermediate segment. In addition to tube 12, transducer module M2 can (and also) Figure 1a , Figure 2 and Figure 3 (As indicated in the instructions) In each case, at least one second tube is additionally placed within the transducer housing 11, which is constructed equivalently to and / or identically to tube 21, and is also releasably mechanically connected to it in a given case. The second tube can be, for example, arranged parallel to tube 21 and / or connected for flow parallel to tube 21, such that at least two tubes of the measuring transducer simultaneously deliver two portions of the same fluid during operation and are induced to vibrate during this period. Alternatively or additionally, the measuring transducer can further have multiple other coil-magnetic devices formed by paired electric coils and permanent magnets, such that the measuring transducer has (and also also) Figure 1a (Illustratively indicated, and very common in the case of the type of measuring transducer discussed) at least two other coils, in particular coils equivalent to coil 12 (which are mechanically connected to the housing wall 11+), and / or constructed substantially equivalent to coil 12, and thus at least two other permanent magnets, in particular permanent magnets equivalent to permanent magnet 22 (which are mounted on the intermediate segment 21a) and / or constructed substantially equivalent to permanent magnet 22, and / or such that each tube of the measuring transducer has three mutually spaced permanent magnets in each case, and in each case three mounted electric coils located opposite each other on the housing 11.

[0044] Naturally, the measuring transducer has (and also in each case in) Figure 1a , Figure 4 , Figure 5 and Figure 6 (As indicated in the diagram, or directly apparent from a combination of these diagrams) multiple imaginary reference axes, such that the first reference axis z (in...) Figure 1a , Figure 3 , Figure 5 and Figure 6 In each case, in the direction e z (Extended upwards) Imaginarily connecting the midpoint of the first cross-sectional region of the plane of the intermediate segment including the flow cross-section A1 at the end of the first segment and the midpoint of the second cross-sectional region of the plane of the intermediate segment 21a including the flow cross-section A2 at the end of the second segment. Figure 1a , Figure 5 and Figure 6 ), so that the second reference axis x1 (in Figure 3 , Figure 4 and Figure 6 In each case, in the direction e x The upper extension) coincides with the longitudinal axis of the coil 12, or is derived from the longitudinal axis ( Figure 4 and Figure 6 Established such that the third reference axis x2 coincides with the longitudinal axis of the permanent magnet 22, or is established by the longitudinal axis ( Figure 4 and Figure 6 ) is established such that the fourth reference axis y1 (in Figure 3 , Figure 4 and Figure 5 In each case, in the direction e y The upward extension intersects the reference axis z and the reference axis x1 at a right angle (i.e., an intersection angle of 90°) in each case. Figure 4 and Figure 5 Furthermore, the fifth reference axis y2 intersects both the reference axis z and the reference axis x2 at right angles in every case. Figure 4 and Figure 5In addition, the measuring transducer also has a sixth reference axis y3, which (and also in Figure 4 and Figure 5 (As indicated in the middle, or as can be seen from their combination) in each case, it intersects the reference axis x2 and the directrix L at right angles.

[0045] Furthermore, the tube wall 21+, and thus the tube 21 formed therefrom, is also formed such that, particularly due to tolerances in the production of the transducer module M2 or the tube 21, the guideline L of the channel surface of the intermediate segment 21a established by the outer surface of the tube (here, in particular, also imaginarily connecting the midpoint of the first cross-sectional area and the second cross-sectional area mentioned above) also extends at least partially beyond the imaginary first reference plane (yz1) of the measuring transducer defined by the reference axis z and the reference axis y1 in the static rest position; this also particularly causes the guideline L (especially to a degree that is generally unpredictable and further cannot be directly verified) to intersect the reference plane (yz1) once or more. Therefore, the curve of the lateral separation between the guideline L and the outer casing wall also has corresponding irregularities, which are inherently not directly verifiable; this also makes it particularly possible that the minimum separation between the coil 12 and the tube wall, and between the tubes formed therefrom, can only be approximately predetermined, and the minimum separation can have a relatively high dispersion when measured in a large number of continuous measurement systems or measurement system examples formed by the same example of transducer module M1 and multiple examples of transducer module M2. In order to reduce the influence of the above-mentioned production-related irregularities of the (tubular) shape of the intermediate segment 21a, or to reduce the influence of the related dispersion of the above-mentioned minimum separation between the coil 12 and the tube wall, the permanent magnet of the measuring transducer of the present invention is mounted, in particular positioned and oriented, on the intermediate segment 21a such that, in the static rest position of the tube, the imaginary second reference plane (xy1) of the measuring transducer defined by reference axis x1 and reference axis y1 is parallel to the imaginary third reference plane (xy2) of the measuring transducer defined by reference axis x2 and reference axis y2, or also in Figure 6The instructions state that, in the static, stationary position of the tube, the second and third reference planes at most hypothetically intersect each other to form a (minimum) intersection angle α, which totals no more than 1°, for example, no more than 0.5°. For the aforementioned case where the hypothetical second and third reference planes (xy1, xy2) of the transducer are parallel to each other, it is advantageous to measure the separation between the reference planes such that their total separation does not exceed 0.5 mm, especially no more than 0.1 mm, ideally zero (α = 0), so that reference planes xy1 and xy2 thus coincide. Additionally, reference axes x2 and y3 define an imaginary fourth reference plane xy3 for the measuring transducer, and the intermediate segment 21a has a third cross-sectional region A3, which is spaced apart from both the first segment end and the second segment end and has a (surface) normal, particularly pointing substantially in the flow direction of the fluid being transported in the tube during operation of the measuring system, and has a flow cross-section, the midpoint of which corresponds to or coincides with the intersection of the reference axis y3 and the directrix L. Furthermore, for example, the at least one tube 21 can be formed such that (in the case of a prepared measuring transducer) the projection of at least the intermediate segment 21a or the directrix L onto the aforementioned reference plane yz1 is V-shaped, or as... Figure 5 As shown, it is U-shaped.

[0046] In an additional embodiment of the invention, the permanent magnet 22 is further mounted on the intermediate segment 21a such that the aforementioned (surface) normal of the reference axis y3 and the flow cross-section of the cross-sectional region A3 is skewed, for example, such that the reference axis y3 corresponds to the minimum conductor of the (surface) normal and the reference axis x2 and / or such that the flow cross-section of the cross-sectional region A3 and the reference plane xy3 imaginarily intersect each other to form a (minimum) intersection angle other than zero, for example, the total (minimum) intersection angle being greater than 0.1°. Alternatively or supplementing this, in the additional embodiment of the invention, the permanent magnet 22 is mounted on the intermediate segment 21a such that, when the transducer module M2 is mounted in the transducer module M1, the reference axis x1 is parallel to or coincides with the reference axis x2.

[0047] The reference axes z, x1, and y1 required in the factory manufacturing of transducer module M2 (and thus far from transducer module M1) for precisely positioning and orienting the permanent magnet 21 on the intermediate segment 21a (also established in transducer module M1) can, for example, be provided in the manufacturing process in a corresponding calibration assembly setup for transducer module M2, which precisely mimics at least the mounting position and location of transducer module M2 in transducer module M1 and precisely replicates the position and location of coil 12 in transducer module M1. Derived from reference axes z, x1, and y1, reference axes x2 and y2 can also be predetermined in the assembly setup by corresponding positioning and adjustment elements and / or by corresponding markings, such as reference points and / or lines correspondingly generated by laser beams.

Claims

1. A vibration-type measuring transducer, comprising: - First transducer module (M1), the first transducer module (M1) includes -- Transducer housing (11), the transducer housing (11) having at least one chamber (11) at least partially surrounded by a housing wall (11+). ),as well as -- At least one first coil (12), said at least one first coil being placed in the chamber (11) of the transducer housing. It is mechanically connected, at least indirectly, to the outer shell wall (11+); as well as - Second transducer module (M2), the second transducer module (M2) includes -- At least one tube (21), said at least one tube having --- Pipe wall (21+), the pipe wall (21+) forming the outer surface of the pipe, and --- Inner cavity (21) ), the inner cavity (21) Surrounded by the tube wall, and -- At least one first permanent magnet (22); - Wherein, the permanent magnet is externally fastened to the middle section of the tube wall, the middle section extends between the first section end on the inlet side and the second section end on the outlet side and is connected by a material bond, the second section end being spaced apart from the first section end; - Wherein, the second transducer module is disposed within the first transducer module and mechanically and releasably securely connected to the first transducer module, such that at least the intermediate segment of the tube is located within the cavity of the transducer housing and is also spaced apart from the housing wall, thereby fixing the second transducer module within the first transducer module; and - wherein the tube is adapted to convey flowing fluid in its inner cavity, and during this period the tube is induced to vibrate, causing the intermediate segment to perform oscillating movement about a static rest position; - Wherein, the measuring transducer includes multiple imaginary reference axes, wherein -- The first reference axis (z) imaginarily connects the midpoint of the first cross-sectional region of the plane including the flow cross-section of the first segment end of the intermediate segment and the midpoint of the second cross-sectional region of the plane including the flow cross-section of the second segment end of the intermediate segment. -- The second reference axis (x1) coincides with and is defined by the longitudinal axis of the coil. -- The third reference axis (x2) coincides with and is determined by the longitudinal axis of the permanent magnet. -- The fourth reference axis (y1) intersects the first reference axis (z) and the second reference axis (x1) at a right angle in every case, and -- The fifth reference axis (y2) intersects the first reference axis (z) and the third reference axis (x2) at a right angle in each case; - Wherein, the tube wall—and thus the tube formed by the tube wall—is formed such that, due to tolerances in the production of the second transducer module, the guideline (L) of the channel surface of the intermediate segment defined by the outer surface of the tube extends at least partially beyond the imaginary first reference plane (yz1) of the measuring transducer defined by the first reference axis (z) and the fourth reference axis (y1) in a static resting position; and The measuring transducer includes a sixth reference axis that intersects both the third reference axis and the directrix at right angles. The intermediate segment shows a third cross-sectional region spaced apart from both the first and second segment ends. This third cross-sectional region represents a normal substantially pointing in the flow direction of the fluid being transported in the pipe and has a flow cross-section. The midpoint of this flow cross-section corresponds to or coincides with the intersection of the sixth reference axis and the directrix. - Wherein, the permanent magnet is placed on the intermediate segment, that is, positioned and oriented such that -- In the static rest position of the tube, the imaginary second reference plane (xy1) of the measuring transducer, defined by the second reference axis (x1) and the fourth reference axis (y1), is parallel to the imaginary third reference plane (xy2) of the measuring transducer, defined by the third reference axis (x2) and the fifth reference axis (y2), such that the second reference plane and the third reference plane have a separation (a) or coincidence, the separation (a) totaling no more than 0.5 mm, or -- In the static rest position of the tube, the second reference plane and the third reference plane imaginarily intersect each other to form an intersection angle (α), the total intersection angle (α) not exceeding 1°. Furthermore, the third reference axis and the sixth reference axis define a hypothetical fourth reference plane of the measuring transducer, and the flow cross section of the third cross section region and the fourth reference plane hypothetically intersect each other to form an intersection angle other than zero.

2. The measuring transducer according to claim 1, wherein, The at least one first coil (12) is a cylindrical first coil.

3. The measuring transducer according to claim 1, wherein, The at least one tube (21) is at least partially straight and / or at least partially curved.

4. The measuring transducer according to claim 1, wherein, The pipe wall is made of metal or plastic.

5. The measuring transducer according to claim 1, wherein, The at least one first permanent magnet (22) is a cylindrical first permanent magnet (22).

6. The measuring transducer according to claim 1, wherein, The fluid is a fluid having a predetermined flow direction and / or a flow direction from the first segment end to the second segment end.

7. The measuring transducer according to claim 1, wherein, The directrix (L) is an imaginary directrix connecting the midpoint of the first cross-sectional region and the midpoint of the second cross-sectional region.

8. The measuring transducer according to claim 1, wherein, The total of the separations (a) is no greater than 0.1 mm.

9. The measuring transducer according to claim 1, wherein, The total number of intersection angles shall not exceed 0.5°.

10. The measuring transducer according to any one of claims 1 to 9, in, The directrix (L) of the channel surface of the intermediate segment intersects the imaginary first reference plane once or multiple times.

11. The measuring transducer according to claim 1, - Wherein, the normal of the flow cross section of the third reference axis (x2) and the third cross section region is skewed, such that the sixth reference axis (y3) corresponds to the minimum conductor of the normal and the third reference axis (x2).

12. The measuring transducer according to claim 11, wherein, The total intersection angle is greater than 0.1°.

13. The measuring transducer according to any one of claims 1 to 9, wherein, The second reference axis (x1) and the third reference axis (x2) are parallel.

14. The measuring transducer according to claim 13, wherein, The second reference axis (x1) and the third reference axis (x2) coincide.

15. The measuring transducer according to any one of claims 1 to 9, wherein, The at least one tube is mechanically coupled to the transducer housing via a first connecting segment on the inlet side adjacent to the first segment end of the intermediate segment and a second connecting segment on the outlet side adjacent to the second segment end of the intermediate segment. That is, the at least one tube is connected to the transducer housing such that displacement of the first connecting segment and the second connecting segment relative to the transducer housing is prevented and / or the second transducer module is fixedly disposed within the first transducer module and cannot be moved.

16. The measuring transducer according to claim 15, wherein, The at least one tube is rigidly coupled to the transducer housing.

17. The measuring transducer according to any one of claims 1 to 9, wherein, The projections of the at least one tube and the guideline onto the first reference plane (yz1) are formed in a U-shape or a V-shape.

18. The measuring transducer according to claim 17, wherein, The projection of the intermediate segment of the at least one tube and the guideline onto the first reference plane (yz1) is formed into a U-shape or a V-shape.

19. The measuring transducer according to any one of claims 1 to 9, wherein, The electric coil and the permanent magnet form a solenoid or plunger coil.

20. The measuring transducer according to any one of claims 1 to 9, further comprising an electromechanical actuator for exciting and maintaining forced oscillation of the intermediate segment of the at least one tube.

21. The measuring transducer according to claim 20, wherein, The actuator device is formed by the electric coil and the permanent magnet.

22. The measuring transducer according to any one of claims 1 to 9, further comprising an electromechanical sensor device for recording forced oscillations of the intermediate segment of the at least one tube, and for providing at least one oscillation signal representing the oscillations of the intermediate segment.

23. The measuring transducer according to claim 22, wherein, The sensor device is formed by the electric coil and the permanent magnet.

24. The measuring transducer according to any one of claims 1 to 9, wherein, The second transducer module is alternatively formed such that it can be removed from the first transducer module.

25. The measuring transducer according to claim 24, wherein, The second transducer module is alternatively formed such that it can be removed from the outside of the transducer housing without damage.

26. The measuring transducer according to any one of claims 1 to 9, wherein, The second transducer module further includes at least one second tube, which is constructed identically to and / or in the same manner as the at least one tube, and is placed inside the transducer housing and mechanically connected to the transducer housing.

27. The measuring transducer according to claim 26, wherein, The at least one second tube is releasably mechanically connected to the transducer housing.

28. A vibration measurement system comprising a measuring transducer according to any one of claims 1 to 27 and measuring system electronics, the measuring system electronics being electrically connected to the at least one coil, wherein, The electronic components of the measurement system are adapted to supply power to the coil via an electric drive signal, and / or to sense the voltage of the coil, to evaluate the oscillation of the intermediate segment based on the voltage, and / or to determine the measured value of at least one measured variable of the fluid flowing in the tube.

29. The vibration measurement system according to claim 28, wherein, The vibration measurement system is a Coriolis mass flow measurement device.

30. The vibration measurement system according to claim 28, wherein, The electronic components of the measurement system are releasably electrically connected to the at least one coil.

31. The vibration measurement system according to claim 28, wherein, The electric driver signal is an electric driver signal with an applied alternating current.

32. The vibration measurement system according to claim 28, wherein, The voltage is the voltage representing the oscillation of the intermediate segment.

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