VIBRONIC MEASURING SYSTEM

Description

[0001] The invention relates to a, in particular Coriolis mass flow meter or

[0002] Coriolis mass flow / density meter, designed vibronic measuring system.

[0003] A generic measuring system, namely a vibronic measuring system used to measure a mass flow of a flowing medium, is described, for example, in US-A 2017 / 0356777 or WO-A 2012 / 028425.The measuring system comprises a measuring transducer with a pipe arrangement for guiding the flowing fluid, with an excitation arrangement for converting electrical power into mechanical power useful for exciting and maintaining forced mechanical vibrations of the pipe arrangement, and with a sensor arrangement for detecting mechanical vibrations of the pipe arrangement and for providing vibration measurement signals representing vibration movements of the pipe arrangement, as well as measuring and operating electronics electrically coupled to the measuring transducer, namely both to its excitation arrangement and to its sensor arrangement, with a first and second driver circuit for providing electrical power for the excitation arrangement and with a measuring transducer circuit for processing vibration measurement signals of the sensor arrangement and for controlling the driver circuit.

[0004] The pipe arrangement comprises a first flow splitter – here serving as a line branch or on the inlet side – with exactly four flow openings, a second flow splitter with exactly four flow openings, identical to the first flow splitter – here serving as a line connection or on the outlet side – and four pipes, each curved in sections and identical in construction only in pairs, namely a first pipe, a second pipe identical in construction to the first pipe, a third pipe, and a fourth pipe identical in construction only to the third pipe. Each of the pipes of the pipe arrangement extends from a respective first end of the respective pipe to a respective second end of the same pipe with a respective pipe length and each has a lumen enclosed by a metallic pipe wall, each extending from the respective first end of the respective pipe to the respective second end of the same pipe.In addition, each of the tubes of the tube arrangement is connected to each of the first and second flow dividers in such a way that the first tube opens with its first end into a first flow opening of the first flow divider and with its second end into a first flow opening of the second flow divider, the second tube opens with its first end into a second flow opening of the first flow divider and with its second end into a second flow opening of the second flow divider, the third tube opens with its first end into a third flow opening of the first flow divider and with its second end into a third flow opening of the second flow divider and the fourth tube opens with its first end into a fourth flow opening of the first flow divider and with its second end into a fourth flow opening of the second flow divider.In addition, each of the tubes in the tube arrangement is also designed to have the medium flowing through it and to vibrate during this process.

[0005] For this purpose, the exciter arrangement comprises two electrodynamic vibration exciters, of which a first vibration exciter is mechanically connected to both the first tube and the second tube, as well as electrically connected to the first driver circuit, and a second vibration exciter is mechanically connected to both the third tube and the fourth tube, as well as electrically connected to the second driver circuit. Each of the first and second vibration exciters is further configured to convert electrical power into mechanical power. The first driver circuit, in turn, is configured to generate an electrical first driver signal and thus feed electrical power only into the first vibration exciter, such that the first and second tubes at least partially generate useful vibrations, namely counter-symmetrical forced mechanical vibrations with at least one first useful frequency.namely, an oscillation frequency predetermined by the first drive signal corresponding to a first resonance frequency of the tube arrangement, which is suitable for causing Coriolis forces in the medium flowing through the first and second tubes, which are dependent on the mass flow, while the second drive circuit is configured to generate an electrical second drive signal and thus feed electrical power only into the second oscillation exciter, such that the third and fourth tubes at least partially perform useful oscillations, namely counter-symmetric forced mechanical oscillations with at least one second useful frequency, namely an oscillation frequency predetermined by the second drive signal and corresponding to a second resonance frequency of the tube arrangement, which are suitable for causing Coriolis forces in the medium flowing through the third and fourth tubes, which are dependent on the mass flow.

[0006] To detect vibrations of the pipe arrangement, the sensor arrangement has four spaced-apart electrodynamic vibration sensors, of which a first vibration sensor and a second vibration sensor are each mechanically connected to both the first pipe and the second pipe and electrically connected to the measuring transducer circuit, and a third vibration sensor and a fourth vibration sensor are each mechanically connected to both the third pipe and the fourth pipe and electrically connected to the measuring transducer circuit. Each of the vibration sensors is further configured to detect vibrational movements of the first, second, third, or fourth pipes mechanically connected thereto and to provide a first, second, third, or fourth vibration measurement signal representing the same vibrational movements.

[0007] The measuring transducer circuit is in turn configured to receive and process both the first vibration measurement signal from the first vibration sensor and the second vibration measurement signal from the second vibration sensor, namely to determine first partial mass flow measurement values representing a mass flow of the medium flowing through the first and second pipes. Furthermore, the measuring transducer circuit is further configured to receive and process both the third vibration measurement signal from the third vibration sensor and the fourth vibration measurement signal from the fourth vibration sensor, namely to determine second partial mass flow measurement values representing a mass flow of the medium flowing through the third and fourth pipes, and to determine total flow measurement values representing a total mass flow of the medium flowing through the first, second, third, and fourth pipes based on the first and second partial mass flow measurement values.

[0008] In the aforementioned measuring system, the vibrations must therefore be evaluated using a special transducer circuit that processes all four vibration measurement signals simultaneously. This leads, among other things, to the fact that this transducer circuit is very complex to develop and manufacture, and, due to the very high component count, can only be used in very limited quantities. Consequently, such a transducer circuit, or the measuring and operating electronics formed with it, has comparatively high marginal costs. Furthermore, the failure of even just one of the four channels for the vibration measurement signals leads to a total failure of the measuring and operating electronics, or the resulting measuring system, which can only be remedied by replacing the entire transducer circuit.

[0009] Based on the aforementioned prior art, it is an object of the invention to improve a vibronic measuring system in such a way that its measuring and operating electronics, on the one hand, enable separate excitation of vibrations of two pairs of tubes as well as separate evaluation of two pairs of vibration signals and, on the other hand, have a simpler and more cost-effective structure.

[0010] The object is achieved according to the invention by the measuring system according to independent claim 1, namely by a vibronic measuring system, such as a Coriolis mass flow meter or a Coriolis mass flow / density meter, for measuring and / or monitoring at least one, for example time-varying, flow parameter, for example a mass flow, a volume flow and / or a flow velocity, and / or for measuring and / or monitoring at least one, for example time-varying, material parameter, for example a density and / or a viscosity, of a flowing medium, for example a gas, a liquid or a dispersion, which measuring system comprises a measuring transducer with a pipe arrangement for guiding the flowing fluid, with an excitation arrangement for converting electrical power into mechanical power useful for exciting and maintaining forced mechanical vibrations of the pipe arrangement, and with a sensor arrangement for detecting mechanical vibrations of the pipe arrangement and for providing vibration measurement signals representing vibration movements of the pipe arrangement, and which measuring system comprises measuring and operating electronics electrically coupled to the measuring transducer, namely both to its excitation arrangement and to its sensor arrangement, for example by means of electrical connecting lines, with a first driver circuit for providing electrical power for the excitation arrangement, with a first measuring transducer circuit for processing vibration measurement signals of the sensor arrangement and for controlling the first driver circuit,with a second driver circuit for providing electrical power to the excitation arrangement, and with a second transducer circuit for processing vibration measurement signals of the sensor arrangement and for controlling the second driver circuit. ,

[0011] The pipe arrangement of the measuring system according to the invention comprises, in particular, a first flow divider, serving in particular as a line branch and / or on the inlet side, with, in particular, exactly four flow openings, a second flow divider, in particular identical to the first flow divider and / or serving as a line connection and / or on the outlet side, with, in particular, exactly four flow openings, as well as four pipes that are only structurally identical in pairs, namely a first pipe, in particular curved at least in sections, a second pipe identical to the first pipe, a third pipe, in particular curved at least in sections, and a fourth pipe identical only to the third pipe. Each of the first, second, third and fourth pipes of the pipe arrangement extends from a respective first end of the respective pipe to a respective second end of the same pipe with a respective pipe length and each has a, in particular metallic,A lumen enclosed by the tube wall and extending from the respective first end of the respective tube to the respective second end of the same tube. Furthermore, each of the first, second, third, and fourth tubes of the tube arrangement is connected to each of the first and second flow dividers in such a way that the first tube extends with its first end into a first flow opening of the first flow divider and with its second end into a first flow opening of the second flow divider, the second tube extends with its first end into a second flow opening of the first flow divider and with its second end into a second flow opening of the second flow divider,the third tube opens with its first end into a third flow opening of the first flow divider and with its second end into a third flow opening of the second flow divider, and the fourth tube opens with its first end into a fourth flow opening of the first flow divider and with its second end into a fourth flow opening of the second flow divider, and each of the first, second, third and fourth tubes of the tube arrangement is designed to be flowed through by the measuring medium and to be vibrated during this flow.

[0012] The exciter arrangement of the measuring system according to the invention has two, in particular electrodynamic and / or structurally identical, vibration exciters, of which a first vibration exciter is mechanically connected to both the first tube and the second tube and electrically, in particular only, to the first driver circuit, and a second vibration exciter is mechanically connected to both the third tube and the fourth tube and electrically, in particular only, to the second driver circuit, wherein each of the first and second vibration exciters is respectively configured to convert electrical power into mechanical power.

[0013] The first driver circuit, in turn, is set up to generate an electrical first driver signal and thus to feed electrical power, in particular only, into the first vibration exciter, in such a way that the first and second tubes at least partially carry out useful vibrations, namely opposed forced mechanical vibrations with at least one first useful frequency, namely an oscillation frequency predetermined by the first driver signal, in particular corresponding to a first resonance frequency of the tube arrangement, which oscillation frequency is suitable for causing Coriolis forces in the medium flowing through the first and second tubes which are dependent on the mass flow, and the second driver circuit is set up to generate an electrical second driver signal and thus to feed electrical power, in particularmerely to feed into the second vibration exciter in such a way that the third and fourth tubes at least partially carry out useful vibrations, namely counter-symmetrical forced mechanical vibrations with at least one second useful frequency, namely an vibration frequency predetermined by the second driver signal, in particular corresponding to a second resonance frequency of the tube arrangement, which are suitable for causing Coriolis forces dependent on the mass flow in the medium flowing through the third and fourth tubes.

[0014] The sensor arrangement comprises four vibration sensors, in particular electrodynamic and / or structurally identical and / or spaced apart, of which a first vibration sensor and a second vibration sensor are each mechanically connected to both the first tube and the second tube and electrically connected, in particular only, to the first transducer circuit, and a third vibration sensor and a fourth vibration sensor are each mechanically connected to both the third tube and the fourth tube and electrically connected, in particular only, to the second transducer circuit. Each of the first, second, third, and fourth vibration sensors is specifically configured to detect vibrational movements of the first, second, third, and fourth tubes mechanically connected thereto, respectively, and to provide a first, second, third, and fourth vibration measurement signal, in particular electrical, representing the same vibrational movements.

[0015] The first measuring transducer circuit is in turn configured to receive and process both the first vibration measurement signal from the first vibration sensor and the second vibration measurement signal from the second vibration sensor, namely to determine, in particular digital, first partial mass flow measurement values representing a mass flow of the medium flowing through the first and second pipes and to output them to the second measuring transducer circuit,

[0016] and the second measuring transducer circuit is configured to receive and process both the third vibration measurement signal from the third vibration sensor and the fourth vibration measurement signal from the fourth vibration sensor as well as first partial mass flow measurement values output by the first measuring transducer circuit, namely to determine, in particular digital, total flow measurement values representing a total mass flow of the medium flowing through the first, second, third and fourth pipes.

[0017] According to a first embodiment of the invention, it is further provided that the first driver circuit is electrically connected, for example via a data bus, to the first measuring transducer circuit, but for example not to the second measuring transducer circuit.

[0018] According to a second embodiment of the invention, it is further provided that the second driver circuit is electrically connected, for example via a data bus, to the second measuring transducer circuit, but for example not to the first measuring transducer circuit.

[0019] According to a third embodiment of the invention, it is further provided that the first measuring transducer circuit and the second measuring transducer circuit are electrically connected to one another, for example via a data bus.

[0020] According to a fourth embodiment of the invention, it is further provided that the first measuring transducer circuit is formed by a first microprocessor. Further developing this embodiment, it is further provided that the second measuring transducer circuit is formed by a second microprocessor.

[0021] According to a fifth embodiment of the invention, it is further provided that the second transducer circuit is configured to use the third and fourth vibration measurement signals to determine, for example, digital, second partial mass flow measurement values representing a mass flow of the medium flowing through the third and fourth pipes. Further developing this embodiment, it is further provided that the second transducer circuit is configured to determine the total flow measurement values using second partial mass flow measurement values.

[0022] According to a sixth embodiment of the invention, it is further provided that the sensor arrangement has at least two temperature sensors, in particular of identical construction and / or spaced apart from one another, of which a first temperature sensor is mechanically connected to one of the first, second, third and fourth tubes, in particular namely to the first tube or to the second tube, and electrically in each case, in particular only, to the second measuring transducer circuit, and a second temperature sensor is mechanically connected to one of the first, second, third and fourth tubes, in particular namely to the same tube as the first temperature sensor, and electrically in each case, in particular only, to the second measuring transducer circuit, and that each of the first and second temperature sensors is each set up to detect a temperature of the first, second, third or fourth tube mechanically connected thereto and to produce a first or second temperature sensor, in particular electrical, representing the same temperature.provide a second temperature measurement signal. Further developing this embodiment of the invention, the second transducer circuit is further configured to receive and process the first temperature measurement signal from the first temperature sensor, namely to determine the temperature detected by the first temperature sensor or a temperature dependent thereon, in particular digital, first temperature measurement values. Furthermore, the second transducer circuit can be configured to receive and process the second temperature measurement signal from the second temperature sensor, namely to determine the temperature detected by the second temperature sensor or a temperature dependent thereon, in particular digital, second temperature measurement values, for example, to determine the total mass flow measurement values also using the first and second temperature measurement values.Alternatively or additionally, the second measuring transducer circuit can also be configured to output at least the first temperature measured values, for example the first and second temperature measured values, to the first measuring transducer circuit, and the first measuring transducer circuit can then also be configured to receive and evaluate temperature measured values output by the first measuring transducer circuit, for example to determine the first partial mass flow measured values and / or the first partial density measured values also using at least the first temperature measured values.

[0023] According to a seventh embodiment of the invention, it is further provided that the first measuring transducer circuit is configured to determine, based on at least one of the first and second vibration measurement signals, first partial density measurement values representing a density of the medium flowing through the first and second pipes, in particular digital, and to output them to the second measuring transducer circuit. Further developing this embodiment of the invention, the second measuring transducer circuit is additionally configured to receive first partial density measurement values output by the first measuring transducer circuit and to determine, based on first partial density measurement values and at least one of the third and fourth vibration measurement signals, total density measurement values representing a density of the medium flowing through the first, second, third, and fourth pipes, in particular digital.

[0024] According to an eighth embodiment of the invention, the second measuring transducer circuit is designed to determine, on the basis of at least one of the third and fourth vibration measurement signals, second partial density measurement values representing, in particular, digital, second partial density measurement values, a density of the medium flowing through the third and fourth pipes. Developing this embodiment of the invention further, the first measuring transducer circuit is designed to determine, on the basis of at least one of the first and second vibration measurement signals, first partial density measurement values representing, in particular, digital, first partial density measurement values, of the medium flowing through the first and second pipes and to output them to the second measuring transducer circuit, and the second measuring transducer circuit is designed to receive first partial density measurement values output by the first measuring transducer circuit and, on the basis of the first and second partial density measurement values, to determine, in particular,to determine the average density of the medium flowing through the first, second, third and fourth pipes, particularly digital, total density measurement values.

[0025] According to a first development of the invention, the measuring system further comprises: a transducer housing enclosing the first, second, third, and fourth tubes, wherein the transducer housing has at least one, in particular hermetically sealed, cavity, and wherein each of the first, second, third, and fourth tubes is arranged within the same cavity. Further developing this embodiment of the invention, it is further provided that the sensor arrangement has at least one third temperature sensor, and that the third temperature sensor is mechanically connected to the transducer housing and electrically, in particular only, to the second measuring transducer circuit and is configured to detect a temperature of the transducer housing and to provide a third temperature measurement signal, in particular an electrical one, representing the same temperature.Furthermore, the second transmitter circuit can be configured to receive and process the third temperature measurement signal from the third temperature sensor, namely to determine the temperature detected by the third temperature sensor or a temperature-dependent third temperature measurement value, in particular a digital one, representing the temperature, for example, in order to determine the total mass flow measurement values also using the third temperature measurement values. Alternatively or additionally, the second transmitter circuit can also be configured to output the third temperature measurement values to the first transmitter circuit, and the first transmitter circuit can then be configured to receive and evaluate the third temperature measurement values, namely to determine the first mass flow measurement values also using the third temperature measurement values.

[0026] According to a second development of the invention, the measuring system further comprises: a, in particular explosion-proof or pressure-resistant, electronics protective housing, wherein, for example, both the first and second driver circuits and the first and second measuring transducer circuits are accommodated in the same electronics protective housing, in particular at least protected against splash water.

[0027] According to a third development of the invention, the measuring and operating electronics further comprises: an interface circuit - for example, accommodated together with the first and second driver circuits and the first and second measuring transducer circuits in an electronic protective housing of the measuring system - for outputting measured values, in particular digital values and / or values determined by means of the second measuring transducer circuit.

[0028] According to a first embodiment of the third further development of the invention, it is provided that the interface circuit is electrically connected to the second measuring transducer circuit, but for example not to the first measuring transducer circuit.

[0029] According to a second embodiment of the third development of the invention, the second measuring transducer circuit is configured to output total flow measurement values determined thereby to the interface circuit, and the interface circuit is configured to receive total mass flow measurement values output by the second measuring transducer circuit and to convert them into a mass flow output signal providing the same total mass flow measurement values, for example also conforming to an industry standard.

[0030] The invention and advantageous embodiments thereof are explained in more detail below using exemplary embodiments illustrated in the figures of the drawing. Identical or similarly acting or functioning parts are provided with the same reference numerals in all figures; where clarity requires it or it otherwise seems expedient, previously mentioned reference numerals are omitted in subsequent figures. Further advantageous embodiments or developments, in particular combinations of partial aspects of the invention initially explained only individually, will become apparent from the figures of the drawing and / or from the claims themselves.

[0031] In detail: Fig. 1, 2A, 2B show various, partly sectioned and / or perspective, side views of a vibronic measuring system; Fig. 3A, 3B show various, partly sectioned and / or perspective, side views of a vibronic measuring system according to Fig. 1 , 2A or 2B suitable transducer; Fig. 4A, 4B in two side views a tube arrangement of a transducer according Fig. 3A, 3B ; Fig. 5A, 5B in two further side views the tube arrangement of a measuring transducer according to Fig. 4A und 4B ; Fig. 6 schematically in the form of a block diagram a for a vibronic measuring system according to Fig. 1 , 2A or 2B suitable measuring and operating electronics; and Fig. 7 schematically in the form of a block diagram a further variant of a vibronic measuring system according to Fig. 1 , 2A or 2B suitable measuring and operating electronics.

[0032] In Fig. 1 , 2A und 2B , exemplary embodiments or design variants for a vibronic measuring system useful for measuring and / or monitoring at least one, in particular time-varying, flow parameter, for example a mass flow, a volume flow and / or a flow velocity, and / or for measuring and / or monitoring at least one, in particular time-varying, material parameter, for example a density and / or a viscosity, of an at least temporarily flowing fluid FL are schematically shown. The measuring system is particularly intended or configured to be integrated into the course of a process line carrying the fluid FL serving as the measured material - for example a gas, a liquid or a dispersion - and / or to be designed as a pipeline, and to be flowed through at least temporarily during operation by the fluid FL supplied to or discharged again via the process line.

[0033] As in Fig. 3A, 3B presented or from a summary of the Fig. 1 , 2A , 2B , 3A und 3B As is readily apparent, the measuring system comprises a measuring transducer MW with a pipe arrangement formed by means of four - for example for the purpose of providing parallel flow paths with differing flow resistances - only pairwise identical pipes (111, 121, 112, 122) and two flow dividers (21, 22) connected to each of them, an excitation arrangement (31, 32) for converting electrical power into the excitation and maintenance of forced mechanical vibrations of the pipes and a sensor arrangement (41, 42, 43, 44) for detecting mechanical vibrations of the pipe arrangement and for providing vibration measurement signals representing vibration movements of the pipe arrangement, in particular of its pipes.In addition, the measuring transducer can also be provided with, for example, a temperature measuring arrangement for detecting temperatures within the pipe arrangement and / or a strain measuring arrangement for detecting mechanical stresses within the pipe arrangement.

[0034] According to a further embodiment of the invention, the pipe arrangement comprises a curved first pipe 111, a curved second pipe 121 which is structurally identical to the same pipe 111, a curved third pipe 112 and a fourth pipe 122 which is structurally identical to neither the pipe 111 nor the pipe 121. In addition, the pipe arrangement comprises - as shown in the Fig. 2A, 2B , 3A, 3B , 4A, 4B , 5Aor 5B or readily apparent from their combination - a first flow divider 21 with four flow openings 21-1, 21-2, 21-3, 21-4 and a second flow divider 22, for example of the same construction as the flow divider 21, with likewise four flow openings 22-1, 22-2, 22-3, 22-4. Each of the tubes 111, 112, 121, 122 extends from a respective first end of the respective tube to a respective second end of the same tube with a respective tube length and each has a lumen enclosed by a - for example metallic - tube wall, each extending from the respective first end of the respective tube to the respective second end of the same tube. Furthermore, each of the tubes 111, 112, 121, 122 - as also in Fig. 3A und 3B shown or from a summary of the Fig. 2A, 2B , 3A, 3B , 4A und 4B readily apparent - are connected to each of the two flow dividers 21, 22, for example, namely materially, non-positively and / or positively connected thereto, such that the pipe 111 with its first end into a first flow opening 21-1 of the flow divider 21 and with its second end into a first flow opening 22-1 of the flow divider 22, the pipe 121 with its first end into a second flow opening 21-2 of the flow divider 21 and with its second end into a second flow opening 22-2 of the flow divider 22, the pipe 112 with its first end into a third flow opening 21-3 of the flow divider 21 and with its second end into a third flow opening 22-3 of the flow divider 22 and the pipe 122 with its first end into a fourth flow opening 21-4 of the flow divider 21 and with its second end into a fourth flow opening 22-4 of the flow divider 22.In addition, each of the tubes 111, 112, 121, 122 of the tube arrangement is designed to have the medium flowing through it and to vibrate during this flow. As can be seen from the overview of the . Fig. 2A, 2B , 3A, 3B , 4A und 4B Clearly, the flow divider 21 can be arranged on the inlet side in the flow direction of the fluid FL or serve as a line branch, and the flow divider 22 can be arranged on the outlet side in the flow direction of the fluid FL or serve as a line junction. According to a further embodiment of the invention, it is further provided that the pipe arrangement has exactly four pipes, thus, apart from the aforementioned pipes 111, 112, 121, 122, no further pipe is connected to the flow divider 21 and the flow divider 22. The aforementioned pipe length here corresponds to an extended length or a length of an imaginary center line of the respective pipe, wherein the pipe length of the pipe 111 is equal to the pipe length of the pipe 121, and the pipe length of the pipe 121 is equal to the pipe length of the pipe 122.According to a further embodiment of the invention, the tube length of tube 111 is merely equal to the tube length of tube 121, but is nevertheless greater than the tube length of both tube 121 and tube 122, or the tube length of tube 121 is merely equal to the tube length of tube 122, but is nevertheless smaller than the tube length of both tube 111 and tube 112. The tube wall of each of the tubes 111, 121, 112, 122 of the tube arrangement has a predetermined - for example, substantially uniform - wall thickness and can - as is quite common with tube arrangements of the type in question or with measuring transducers or measuring systems formed therewith - be made, for example, of the same material and / or a metal, in particular a stainless steel or a nickel-based alloy.The tubes 111, 121, 112, 122 can also, for example, each be formed in one piece, for example seamlessly or at least in the case of a tube wall made of metal with a welded seam, and / or each be formed by bending a tubular semi-finished product, for example in such a way that each of the tubes 111, 121, 112, 122 - as also in . Fig. 2A, 2B , 3A und 3B as indicated in each case - is essentially V-shaped or has a V-shaped silhouette and / or that each of the tubes ultimately has a tubular shape lying in a single (bending) plane. According to a further embodiment of the invention, each of the tubes has a caliber, namely an inner diameter, that is not less than 20 mm, for example even more than 40 mm, and / or that is equal to the caliber of each of the other tubes. Since the two tubes 111, 121 or the two tubes 121, 122 are identical in construction, the aforementioned caliber of the tube 111 is the same as the caliber of the tube 121 or the caliber of the tube 121 is the same as the caliber of the tube 122. According to a further embodiment of the invention, the caliber of each of the tubes 111, 112, 121, 122 is the same as the caliber of each of the other tubes 111, 112, 121 or122 and / or each of the tubes 111, 121, 112, 122 further has a tube length-to-caliber ratio, measured as a quotient of the respective tube length to the respective caliber, that is greater than 25 (25:1), but for example also less than 30 (30:1). According to a further embodiment of the invention, the tube wall of each of the tubes has a minimum wall thickness that is not less than 1 mm, for example even more than 1.5 mm, and / or that is equal to the minimum wall thickness of the tube wall of each of the other tubes. Since the two tubes 111, 121 or the two tubes 121, 122 are identical in construction, the aforementioned smallest wall thickness of the tube wall of the tube 111 is equal to the smallest wall thickness of the tube wall of the tube 121 or the smallest wall thickness of the tube wall of the tube 121 is equal to the smallest wall thickness of the tube wall of the tube 122.According to a further embodiment of the invention, the aforementioned wall thickness of the pipe wall of each of the pipes 111, 112, 121, 122 is equal to the smallest wall thickness of the pipe wall of any other of the pipes 111, 112, 121 or 122. In order to connect the pipe arrangement or the measuring transducer or measuring system formed thereby to the aforementioned process line carrying the fluid FL, the flow divider 21 can additionally have a first connecting flange - for example, serving to connect the pipe arrangement to a line segment of the same process line which supplies the fluid FL during operation - and the flow divider 22 can have a second connecting flange - for example, serving to connect the pipe arrangement to a line segment of the process line which discharges the fluid FL. On each of the aforementioned connecting flanges, for example, a sealing surface for fluid-tight orThe sealing surfaces can be designed to ensure a leak-free connection of the pipe arrangement to the corresponding line segment of the process line. Each of the two sealing surfaces can have a smallest diameter, which defines a nominal diameter of the measuring transducer, of more than 100 mm, and / or a smallest distance from the other sealing surface, which defines an installation length of the pipe arrangement or the measuring transducer formed thereby, of more than 1000 mm and / or less than 3000 mm.

[0035] According to a further embodiment of the invention, the tubes 111, 121, 112, 122 and the flow dividers 21, 22 are further designed and arranged such that the tube arrangement, as in Fig. 4A or 4B schematically shown, a first imaginary connecting axis z1, which imaginarily connects a center point of the flow opening 21-1 and a center point of the flow opening 22-1, a second imaginary connecting axis z2, which imaginarily connects a center point of the flow opening 21-2 and a center point of the flow opening 22-2, a third imaginary connecting axis z3, which imaginarily connects a center point of the flow opening 21-3 and a center point of the flow opening 22-3, and a fourth imaginary connecting axis z4, which imaginarily connects a center point of the flow opening 21-4 and a center point of the flow opening 22-4, such that each of the aforementioned imaginary connecting axes z1, z2, z3, z4 runs parallel to each other of the same connecting axes z1, z2, z3, z4. According to a further embodiment of the invention - as also from Fig. 4A, 4B , 5Aor 5B - each of the tubes 111, 112, 121, 122 is shaped in such a way that it has a first imaginary plane of symmetry yz-111, yz-121, yz-112 or yz-122, for example corresponding to a respective imaginary longitudinal section plane, and a second imaginary plane of symmetry xy-111, xy-121, xy-112 or xy-122 perpendicular thereto, for example corresponding to a respective imaginary cross-sectional plane, and that it is mirror-symmetrical in each case both to the associated first plane of symmetry and to the associated second plane of symmetry.The tubes 111, 121, 112, 122 and the flow dividers 21, 22 can further be designed and arranged such that both the imaginary plane of symmetry yz-111 runs parallel to the imaginary plane of symmetry yz-121 and the imaginary plane of symmetry yz-112 runs parallel to the imaginary plane of symmetry yz-122 and / or that both the imaginary plane of symmetry yz-111 is coincident with the imaginary plane of symmetry yz-112 and the imaginary plane of symmetry yz-121 is coincident with the imaginary plane of symmetry yz-122. According to a further embodiment, the tubes 111, 121, 112, 122 and the flow dividers 21, 22 are further designed and arranged such that the tube arrangement has at least one first imaginary plane of symmetry yz located both between the tube 111 and the tube 121 and between the tube 112 and the tube 122, with respect to which the tube arrangement, as also from . Fig. 5A The pipe arrangement can be seen from a summary of the Fig. 4A, 4B , 5A und 5B readily apparent - further be designed such that its first plane of symmetry yz is aligned, for example, parallel to each of the aforementioned planes of symmetry yz-111, yz-121, yz-112, yz-122 of the tubes 111, 121, 112 and 122, respectively, and / or is arranged at the same distance from each of the aforementioned planes of symmetry yz-111, yz-121, yz-112, yz-122 of the tubes 111, 121, 112 and 122, respectively; This is also the case, for example, in such a way that the two tubes 111, 121 are parallel to one another or to the aforementioned imaginary plane of symmetry yz of the tube arrangement and the two tubes 112, 122 are parallel to one another or to the imaginary plane of symmetry yz of the tube arrangement and / or that the two tubes 111, 121 lie in a common first tube plane and the tubes 121, 122 lie in a common second tube plane.Accordingly, according to a further embodiment of the invention, the tube 111 has a smallest distance from the imaginary plane of symmetry yz of the tube arrangement, which is equal to a smallest distance that the tube 112 has from the same imaginary plane of symmetry yz and / or the tube 121 has a smallest distance from the imaginary plane of symmetry yz of the tube arrangement, which is equal to a smallest distance that the tube 122 has from the same imaginary plane of symmetry yz. According to a further embodiment of the invention, it is further provided that the tube arrangement, in addition to the aforementioned first imaginary plane of symmetry yz, has a second imaginary plane of symmetry xy which is perpendicular thereto but which imaginarily intersects each of the tubes and is also mirror-symmetrical with respect to the same second imaginary plane of symmetry xy.

[0036] Each of the tubes 111, 121, 112, 122 of the tube arrangement is further configured to carry fluid, in particular a partial volume of the fluid FL to be measured, in its respective lumen and to be vibrated during this time, for example, namely to execute forced mechanical oscillations around a respective associated static rest position - in particular causing a measuring effect corresponding to the at least one measured variable and / or excited by means of the excitation arrangement; this is done in particular in such a way that each of the tubes of the tube arrangement is vibrated and during this time fluid flows through it, starting from its respective first end towards its respective second end.The aforementioned forced mechanical vibrations can, as is quite common with measuring transducers of the type in question, be at least partially forced bending vibrations of the tubes about a respective imaginary vibration axis of the tube arrangement, namely one that imaginarily intersects the respective tube; this in particular also in such a way that the aforementioned (four) imaginary vibration axes - for example with the tubes in a static rest position - are essentially parallel to one another and / or to the aforementioned imaginary connecting axes z1, z2, z3, z4.

[0037] The excitation arrangement is particularly provided or configured to convert electrical power fed thereto into mechanical power, such that the pipe arrangement, in particular each of its pipes at least temporarily, executes forced mechanical oscillations around a static rest position, while the sensor arrangement is provided or configured to detect mechanical oscillations of the pipe arrangement, not least mechanical oscillations and / or bending oscillations of the pipes forced by the excitation arrangement, and to provide a first oscillation measurement signal s41, a second oscillation measurement signal s42, a third oscillation measurement signal s43 and a fourth oscillation measurement signal s44, of which - for example electrical - oscillation measurement signals s41, s42, s43, s44 each represents at least partially oscillatory movements of one or more of the pipes 111, 121, 112, 122 of the pipe arrangement, for example in each case by means of a respective,with a variable electrical voltage corresponding to vibrational movements of the pipes; this in particular in such a way that the first and second vibration measurement signals s41, s42 follow a change in a mass flow of the medium being guided in the pipe arrangement with a change in a first phase difference Δφ12, namely a change in a difference between a phase angle of the vibration measurement signal s41 and a phase angle of the vibration measurement signal s42, and that the third and fourth vibration measurement signals s43, s44 follow a change in a mass flow of the medium being guided in the pipe arrangement with a change in a second phase difference Δφ34, namely a change in a difference between a phase angle of the vibration measurement signal s43 and a phase angle of the vibration measurement signal s44, and / or in such a way that each of the aforementioned vibration measurement signals s41, s42, s43,s44 a change in the density of the medium conveyed in the tube arrangement is followed by a change in the respective signal frequency of at least one spectral signal component. To excite and maintain forced mechanical vibrations of the tubes, the exciter arrangement has a first vibration exciter 31, for example an electrodynamic one, and at least one second vibration exciter 32, for example an electrodynamic one and / or structurally identical to the first vibration exciter 31, wherein the vibration exciter 31 is mechanically connected to each of the two tubes 111, 121, and the vibration exciter 32 is mechanically connected to each of the two tubes 112, 122. According to one embodiment of the invention, each of the two vibration exciters 31, 32 is further provided or configured to convert electrical power supplied by the measuring and operating electronics ME into mechanical power,in particular, to convert the mechanical power into forced mechanical vibrations of the tubes 111, 121 and 112, 122 connected to the respective vibration exciter 31 or 32, respectively; this in particular in such a way that the vibration exciter 31 acts differentially on the two tubes 111, 121, namely can and does only introduce opposing excitation forces into the two tubes 111, 121, and that the vibration exciter 32 acts differentially on the two tubes 112, 122, namely can and does only introduce opposing excitation forces into the two tubes 112, 122.

[0038] To generate the aforementioned vibration measurement signals s41, s42, s43, s44, the sensor arrangement comprises a first vibration sensor 41, for example an electrodynamic one, for the vibration measurement signal s41, a second vibration sensor 42, for example an electrodynamic one and / or identical to the first vibration sensor 41, for the vibration measurement signal s42, a third vibration sensor, for example an electrodynamic one and / or identical to the first vibration sensor 41, for the vibration measurement signal s43, and at least one fourth vibration sensor 44, for example an electrodynamic one and / or identical to the third vibration sensor 43, for the vibration measurement signal s44. As also in Fig. 3A, 3B , 4A, und 4B As indicated or as is readily apparent from their combination, both the vibration sensor 41 and the vibration sensor 42 are mechanically connected to each of the two pipes 111, 121 and both the vibration sensor 43 and the vibration sensor 44 are mechanically connected to each of the two pipes 112, 122, for example in such a way that the vibration sensor 41 and the vibration sensor 43 each detect inlet-side vibration movements of the pipes 111, 121, 112 and 122 respectively and that the vibration sensor 42 and the vibration sensor 44 each detect outlet-side vibration movements of the pipes 111, 121, 112 and 122 respectively.For example, the vibration sensors can also be positioned such that the vibration sensor 41 is equidistant from the flow divider 21 as the vibration sensor 42 is from the flow divider 22 and / or such that the vibration sensor 43 is equidistant from the flow divider 21 as the vibration sensor 44 is from the flow divider 22, and / or such that the two vibration sensors 41, 42 are each equidistant from the aforementioned vibration exciter 31 and / or the two vibration sensors 43, 44 are each equidistant from the aforementioned vibration exciter 32. According to a further embodiment of the invention, each of the aforementioned vibration sensors 41, 42 is further provided or configured to detect opposite, possiblyalso opposite, vibration movements of the pipes 111, 121 and to convert them into the respective vibration measurement signal s41, s42 (representing the vibration movements in each case), and each of the aforementioned vibration sensors 43, 44 is further provided or set up to detect opposite, if necessaryto detect even opposite vibrational movements of the tubes 112, 122 and to convert them into the respective vibration measurement signal s43, s44 (respectively representing the same vibrational movements); this in particular in such a way that each of the vibration sensors 41, 42 detects the vibrational movements of the two tubes 111, 121 differentially, namely converts only opposite vibrational movements of the same tubes 111, 121 into the respective vibration measurement signal, and each of the vibration sensors 43, 44 detects the vibrational movements of the two tubes 112, 122 differentially, namely converts only opposite vibrational movements of the same tubes 112, 122 into the respective vibration measurement signal.In order to reduce the number of required connecting lines to the measuring and operating electronics ME, the two vibration sensors 41, 43 can be electrically connected in series such that the two vibration measurement signals s41, s43 superimpose one another, and / or the two vibration sensors 42, 44 can be electrically connected in series such that the two vibration measurement signals s42, s44 superimpose one another.

[0039] According to a further embodiment of the invention, it is further provided that - as in Fig. 4A, 4B , 5A und 5B indicated - each of the tubes 111, 112, 121, 122 of the tube arrangement each has at least one straight, for example hollow-cylindrical, first sub-segment 111-1, 121-1, 112-1 or 122-1 connected to the flow divider 21, for example materially and / or force- and / or form-fitting, an arc-shaped, for example circular-arc-shaped, second sub-segment 111-2, 121-2, 112-2 or 122-2 adjoining the same first sub-segment 111-1, 121-1, 112-1 or 122-1, a straight, for example hollow-cylindrical, third sub-segment adjoining the same second sub-segment 111-2, 121-2, 112-2 or 122-2 Sub-segment 111-3, 121-3, 112-3 or 122-3, an arc-shaped, for example circular arc-shaped, fourth sub-segment 111-4, 121-4, 112-4 or 122-4 adjoining the same third sub-segment 111-3, 121-3, 112-3 or 122-3, an arc-shaped, for example circular arc-shaped, fourth sub-segment 111-4, 121-4, 112-4 or 122-4 adjoining the same fourth sub-segment 111-4, 121-4, 112-4 or122-4 adjoining straight, for example, identical in construction to the respective third sub-segment 111-3, 121-3, 112-3 or 122-3 and / or hollow-cylindrical, fifth sub-segment 111-5, 121-5, 112-5, 122-5, adjoining the same fifth sub-segment 111-5, 121-5, 112-5 or 122-5, an arcuate, for example, identical in construction to the respective second sub-segment 111-2, 121-2, 112-2 or 122-2 and / or circular-arc-shaped, sixth sub-segment 111-6, 121-6, 112-6 or 122-6 adjoining the same sixth sub-segment 111-6, 121-6, 112-6 or 122-6 and also connected to the flow divider 22, for example in a materially and / or force-fitting and / or form-fitting manner, an arc-shaped seventh sub-segment 111-7, 121-7, 112-7 or 122-7, for example structurally identical to the respective first sub-segment 111-1, 121-1, 112-1 or 122-1 and / or hollow-cylindrical.For the aforementioned case in which the tube arrangement has both the symmetry plane yz and the symmetry plane xy perpendicular thereto, a further embodiment of the invention further provides that the same symmetry plane xy imaginarily intersects each of the tubes in its respective fourth sub-segment 111-4, 121-4, 112-4, or 122-4. According to a further embodiment of the invention, each of the tubes has, as also shown in . Fig. 5B indicated or also from a summary of the Fig. 4A, 4B , 5A und 5B readily apparent, each has a pipe bend height h111, h121, h112, h122, measured within the aforementioned plane of symmetry xy as a smallest distance of the respective fourth sub-segment 111-4, 121-4, 112-4 or 122-4 to the associated imaginary connecting axis z1, z2, z3 or z4, which imaginarily connects its respective first and second ends, which pipe bend height is selected such that each of the pipes 111, 121, 112, 122 has a pipe length to pipe bend height ratio, measured as a quotient of the pipe length of the respective pipe to the respective pipe bend height, which is greater than 2 (2:1), for example greater than 2.5 (2.5:1), and less than 4 (4:1), for example less than 3 (3:1), and / or that each of the pipes 111, 121, 112, 122 each have a caliber-to-pipe bend height ratio, measured as a quotient of the caliber of the respective pipe to the respective pipe bend height, which is greater than 0.1, for example also less than 0.2.Furthermore, as can be seen from . Fig. 4A 4B or their combination - the vibration sensor 41 is spaced apart from both the sub-segment 111-2 and the sub-segment 111-4 at the sub-segment 111-3 of the pipe 111, as well as from both the sub-segment 121-2 and the sub-segment 121-4 at the sub-segment 121-3 of the pipe 121, the vibration sensor 42 is spaced apart from both the sub-segment 111-6 and the sub-segment 111-4 at the sub-segment 111-5 of the pipe 111, as well as from both the sub-segment 121-6 and the sub-segment 121-4 at the sub-segment 121-5 of the pipe 121,the vibration sensor 43 can be mounted on the sub-segment 112-3 of the pipe 112 at a distance from both the sub-segment 112-2 and the sub-segment 112-4, as well as on the sub-segment 122-3 of the pipe 122 at a distance from both the sub-segment 122-2 and the sub-segment 122-4, or the vibration sensor 44 can be mounted on the sub-segment 112-5 of the pipe 112 at a distance from both the sub-segment 112-6 and the sub-segment 112-4, as well as on the sub-segment 122-5 of the pipe 122 at a distance from both the sub-segment 121-6 and the sub-segment 122-4; this can also be done, for example, in such a way thatthat the vibration sensor 41 is positioned both partially between the sub-segment 111-3 and the sub-segment 112-3 and partly between the sub-segment 121-3 and the sub-segment 122-3 and the vibration sensor 42 is positioned both partially between the sub-segment 111-5 and the sub-segment 112-5 and partly between the sub-segment 121-5 and the sub-segment 122-5 and / or that the vibration sensor 43 is positioned both partially between the sub-segment 111-3 and the sub-segment 112-3 and partly between the sub-segment 121-3 and the sub-segment 122-3 and the vibration sensor 44 is positioned both partially between the sub-segment 111-5 and the sub-segment 112-5 and partly between the sub-segment 121-5 and the sub-segment 122-5. In addition, the vibration sensors 41, 42 can be spaced equally from the sub-segment 111-4 as well as equally from the sub-segment 121-4 and / or the vibration sensors 43,44 may be equidistant from both sub-segment 112-4 and sub-segment 122-4. Alternatively or additionally, as also shown in , Fig. 4A or 4B or their combination - the vibration exciter 31 can be mounted on the sub-segment 111-4 of the pipe 111 at a distance from both the sub-segment 111-3 and the sub-segment 111-5, and on the sub-segment 121-4 of the pipe 121-4 at a distance from both the sub-segment 121-3 and the sub-segment 121-5, and the vibration exciter 32 can be mounted on the sub-segment 112-4 of the pipe 112 at a distance from both the sub-segment 112-3 and the sub-segment 112-5, and on the sub-segment 122-4 of the pipe 122 at a distance from both the sub-segment 122-3 and the sub-segment 122-5;This can also be done, for example, in such a way that the vibration exciter 31 is equidistant from both the sub-segment 111-3 and the sub-segment 111-5 of the tube 111, as well as from the sub-segment 121-3 and the sub-segment 121-5 of the tube 121, and / or that the vibration exciter 32 is equidistant from both the sub-segment 112-3 and the sub-segment 112-5 of the tube 112, as well as from the sub-segment 122-3 and the sub-segment 122-5 of the tube 122. As in ; Fig. 4A As indicated, the two tubes 111, 112 can further be designed and positioned such that an imaginary longitudinal axis of the straight partial segment 111-3 of the tube 111 and an imaginary longitudinal axis of the straight partial segment 112-3 of the tube 112 (at least in projection onto the aforementioned - here also the drawing plane of the Fig. 4A corresponding - imaginary plane of symmetry yz of the pipe arrangement) in extension a first intersection angle α11-3 and an imaginary longitudinal axis of the straight partial segment 111-5 of the pipe 111 as well as an imaginary longitudinal axis of the straight partial segment 112-5 of the pipe 112 (at least in projection onto the aforementioned imaginary plane of symmetry yz of the pipe arrangement) in extension a second intersection angle α11-5. Similarly, the other two pipes 121, 122 can also be designed such that - as in Fig. 4B indicated - an imaginary longitudinal axis of the partial segment 121-3 of the pipe 121 and an imaginary longitudinal axis of the partial segment 122-3 of the pipe 122 (at least in projection onto the aforementioned - here also the drawing plane of the Fig. 4B corresponding - imaginary plane of symmetry yz of the pipe arrangement) in extension a second intersection angle α12-3 and an imaginary longitudinal axis of the partial segment 121-5 of the pipe 121 and an imaginary longitudinal axis of the partial segment 122-5 of the pipe 122 (at least in projection onto the aforementioned imaginary plane of symmetry yz of the pipe arrangement) in extension a fourth intersection angle α12-5. Each of the aforementioned intersection angles α11-3, α11-5, α12-3, α12-5 is acute-angled, namely greater than 0° and less than 90°. At least the two intersection angles α11-3, α11-5 can, for example, also be of equal size. Alternatively or additionally, the two intersection angles α12-3, α12-5 can also be of equal size.According to a further embodiment of the invention, it is further provided that each of the aforementioned cutting angles α11-3, α11-5, α12-3 and α12-5 is greater than 0.1 - for example, not less than 0.2° - and less than 10 - for example, not greater than 5. As can be seen from a summary of the . Fig. 4A, 4B It is readily apparent that the tubes 111, 121, 112, 122 can also be designed and arranged in such a way thatthat a smallest distance Δ11-4 between the arcuate sub-segment 111-4 of the pipe 111 and the arcuate sub-segment 112-4 of the pipe 112 is both greater than a smallest distance Δ11-3 between the straight sub-segment 111-3 of the pipe 111 and the arcuate sub-segment 112-2 of the pipe 112 and greater than a smallest distance Δ11-5 between the straight sub-segment 111-5 of the pipe 111 and the arcuate sub-segment 112-6 of the pipe 112 and, likewise, a smallest distance Δ12-4 between the arcuate sub-segment 121-4 of the pipe 121 and the arcuate sub-segment 122-4 of the pipe 122 is both greater than a smallest distance Δ12-3 between the straight sub-segment 121-3 of the pipe 121 and the curved sub-segment 122-2 of the pipe 122 as well as greater than a smallest distance Δ12-5 between the straight sub-segment 121-5 of the pipe 121 and the curved sub-segment 122-6 of the pipe 122; this, for example, also in such a way,that the vibration exciter 31 can be positioned both partially between the sub-segment 111-4 of the tube 111 and the sub-segment 112-4 and partially between the sub-segment 121-4 and the sub-segment 122-4 and / or that the vibration exciter 32 - as also in , Fig. 4A or 4B respectively - can be positioned both partially between the sub-segment 111-4 and the sub-segment 112-4 and partially between the sub-segment 121-4 and the sub-segment 122-4.

[0040] To protect the tubes of the tube arrangement and other components of the measuring transducer attached thereto - not least the aforementioned vibration exciters 31, 32 or vibration sensors 41, 42, 43 44 - from harmful environmental influences, to avoid undesired sound emissions from the vibrating tubes or to collect fluid escaping from a leaking tube arrangement, the measuring transducer, as is quite common with measuring transducers of the type in question or measuring systems formed therewith, according to a further embodiment of the invention comprises a transducer housing 200 enclosing the tubes 111, 121, 112, 122 of the tube arrangement. Said transducer housing 200 has at least one, for example hermetically sealed, cavity 200*, within which - as can also be seen from a synopsis of the Fig.1 , 2A , 2B , 3A und 3B visible - each of the tubes 111, 121, 112, 122 of the tube arrangement is arranged. The converter housing can, for example, have a pressure resistance that is greater than a maximum pressure resistance of the tubes of the tube arrangement and / or that is more than 50 bar. Fig. 1 , 2A , 2B , 3A, 3B , the converter housing 200 comprises a support element 200-1 extending from a first end to a second end with a support element length, wherein the support element 200-1 is mechanically, in particular materially, connected at its first end to the flow divider 21 and at its second end to the flow divider 22. Said support element 200-1 has at least one cavity 200*-1 enclosed by a, for example, metallic, wall, forming a partial region of the aforementioned cavity 200* of the converter housing 200 and can, for example, be substantially cylindrical, optionally also at least partially hollow-cylindrical, or tubular. The wall of the support element 200-1 can be made of steel, for example, stainless steel or structural steel, and / or of the same material as the wall of the tubes 111, 121, 112, 122. The support element can, among other things,serve to absorb mechanical forces and / or moments introduced into the measuring transducer via the connected process line during operation of the measuring system, in particular in such a way that no or only very small proportions of these forces and / or moments are transferred to the pipe arrangement arranged within the transducer housing, namely proportions that are negligible for the desired measuring accuracy of the measuring system. In addition to the support element, the transducer housing 200 in the exemplary embodiments shown here also has a casing element 200-2 which is mechanically connected, for example by a material bond, to the support element 200-1 of the transducer housing. This casing element 200-2 can, as can also be seen from a summary of the . Fig. 1 , 2A , 3A und 3B As can be seen, the casing element 200-2 can be formed, for example, in a tubular manner, such that it has a cavity 200*-2, in particular a partially circular cylindrical cavity, which is surrounded by a wall and forms a portion of the aforementioned cavity 200*. Alternatively, the casing element 200-2 can also be formed, for example, in a cap-shaped manner, such that a wall of the casing element together with a segment of the wall of the carrier element form or enclose the aforementioned cavity 200*-2. As can also be seen from the Fign. 3A, 3B As can be seen, the converter housing and the tube arrangement are further designed such that each of the tubes 111, 121, 112, 122 of the tube arrangement is only partially arranged within the cavity 200*-1 of the support element 200-1 or each of the tubes 111, 121, 112, 122 is only partially arranged within the cavity 200*-2 of the enveloping element 200-2; this - as can be seen from the Fign. 3A, 3B readily apparent - for example, such that each of the sub-segments 111-4, 121-4, 112-4, 122-4 of the tubes is arranged exclusively within the cavity 200*-2 of the enveloping element 200-2 and / or that each of the sub-segments 111-3, 121-3, 112-3, 122-3, 111-5, 121-5, 112-5, 122-5 of the tubes is arranged at least predominantly within the cavity 200*-2 of the enveloping element 200-2 and / or that each of the sub-segments 111-2, 121-2, 112-2, 122-2, 111-6, 121-6, 112-6, 122-6 of the tubes is arranged at least predominantly outside the cavity 200*-2 of the enveloping element 200-2 is arranged or that conversely each of the second sub-segments 111-2, 121-2, 112-2, 122-2, 111-6, 121-6, 112-6, 122-6 of the tubes is arranged at least predominantly within the cavity 200*-1 of the support element 200-1 and / or that each of the sub-segments 111-3, 121-3, 112-3, 122-3, 111-5, 121-5, 112-5, 122-5 of the tubes is arranged at least predominantly outside the cavity 200*-1 of the support element 200-1.According to a further embodiment of the invention, for the lateral passage of the tubes 111, 121, 112, 122 through the support element 200-1, its wall has a first opening 200-1a and at least one second opening 200-1b spaced from the same opening 200-1a along an imaginary surface line of the wall. As can be seen from the . Fign. 3A und 3B As is readily apparent, each of the two openings 200-1a, 200-1b forms a portion of the aforementioned cavity 200* of the converter housing 200. In addition, each of the tubes 111, 121, 112, 122 of the tube arrangement extends through both the opening 200-1a and the opening 200-1b.

[0041] To avoid contact between the vibrating tubes or with the transducer housing, which could be detrimental to the measurement, each of the tubes 111, 121, 112, 122 has only such distances from the other tubes as well as from the transducer housing 200, and not least from a respective edge of each of the two aforementioned openings 200-1a, 200-1b in the wall of the support element 200-1, that each of the tubes 111, 121, 112, 122 of the tube arrangement has a minimum distance from the transducer housing 200 and / or a minimum distance from any other of the tubes 111, 121, 112, or 122 that is greater than 5 mm. Accordingly, each of the tubes also has a smallest distance to an edge of the opening 200-1a oreach have a smallest distance to an edge of the opening 200-1b which is greater than 5 mm. In order to be able to provide a measuring transducer that is as compact as possible, according to a further embodiment it is provided that one or more, if necessary even each of the aforementioned smallest distances be kept less than 10 mm. According to a further embodiment of the invention it is further provided that both within the opening 200-1a and within the opening 200-1b a respective smallest distance between the tube 111 and the tube 112 is in each case smaller than the aforementioned smallest distance between the sub-segment 111-4 of the tube 111 and the sub-segment 112-4 of the tube 112 orthat both within the opening 200-1a and within the opening 200-1b, a respective smallest distance between the tube 121 and the tube 122 is smaller than the aforementioned smallest distance between the fourth sub-segment 121-4 of the tube 121 and the sub-segment 122-4 of the fourth tube 122.

[0042] In addition to the measuring transducer MW, the measuring system further comprises a measuring and operating electronics unit ME which is electrically coupled to it, namely both to the aforementioned excitation arrangement of the measuring transducer and to the aforementioned sensor arrangement of the measuring transducer, for example by means of corresponding electrical connecting lines. The measuring and operating electronics unit ME of the measuring system according to the invention has two, for example identical, driver circuits (Exc1, Exc2) for providing electrical power for the excitation arrangement, of which a first driver circuit Exc1 is designed to generate an electrical first driver signal e31 and thus to supply electrical power, for example only orexclusively, to be fed into the vibration exciter 31 in such a way that the first and second tubes 111, 112 at least partially carry out useful vibrations, namely counter-symmetrical forced mechanical vibrations with at least one first useful frequency f N1 , namely an oscillation frequency predetermined by the driver signal e31, which are suitable for causing Coriolis forces dependent on the mass flow in the medium flowing through the same tubes 111, 112, and of which a second driver circuit Exc2 is set up to generate an electrical second driver signal e32 and thus to generate electrical power, for example only or.exclusively, to be fed into the vibration exciter 32 in such a way that the third and fourth tubes 121, 122 at least partially execute useful vibrations, namely counter-symmetrical forced mechanical vibrations with at least one second useful frequency f N2 , namely an oscillation frequency predetermined by the driver signal e32, which are suitable for causing Coriolis forces in the medium flowing through the third and fourth tubes, which are dependent on the mass flow. The aforementioned first useful frequency f N1 can, for example, correspond to a first resonance frequency of the tube arrangement that is dependent on the density of the fluid FL carried in the tube arrangement - for example, namely a lowest common resonance frequency of a first tube pair formed by the tubes 111, 121 - and the aforementioned second useful frequency f N2 can, for example, correspond to a frequency dependent on the density of the fluid FL carried in the tube arrangement, if necessary.also correspond to a second resonance frequency of the tube arrangement, which deviates from the first resonance frequency - for example, namely a lowest common resonance frequency of a second tube pair formed by tubes 112, 122. According to a further embodiment of the invention, it is further provided that the vibration exciter 31 is electrically connected only or exclusively to the driver circuit Exc1 and that the vibration exciter 32 is electrically connected only or exclusively to the driver circuit Exc2; thus, it is provided that, during operation, the driver circuit Exc1 does not feed any electrical power into the vibration exciter 32 and the driver circuit Exc2 does not feed any electrical power into the vibration exciter 31.

[0043] Furthermore, the measuring and operating electronics are also provided or set up to receive and evaluate the aforementioned vibration measurement signals s41, s42, s43, s44, for example, namely based on their aforementioned first phase difference Δφ12 and / or based on their aforementioned second phase difference Δφ34 to generate (total) mass flow measurement values (X m ) representing the mass flow of the medium FL and / or based on at least one signal frequency of at least one of the vibration measurement signals s41, s42, s43, s44, for example, namely based on a signal frequency of at least one of the vibration measurement signals s41, s42 corresponding to the aforementioned first useful frequency and / or based on a signal frequency of at least one of the vibration measurement signals s43, s44 corresponding to the aforementioned second useful frequency, To generate (total) density measurements (X ρ ).Alternatively or additionally, the measuring and operating electronics can also be provided or set up to generate (total) viscosity measurement values (X η ) representing the viscosity of the medium FL based on at least one of the vibration measurement signals s41, s42, s43, s44, and / or at least one of the aforementioned driver signals e31, e32.

[0044] For processing vibration measurement signals of the sensor arrangement and for controlling the driver circuits, the measuring and operating electronics ME of the measuring system according to the invention - as in Fig. 6 schematically shown - a first measuring transducer circuit DSV1 and at least one second measuring transducer circuit DSV2, wherein the measuring transducer circuit DSV1 is set up to receive and process both the vibration measurement signal s41 from the vibration sensor 41 and the vibration measurement signal s42 from the vibration sensor 42, namely a mass flow, m1, of the measuring medium (FL12) flowing through the first and second pipes 111, 112, representing, in particular.to determine digital, first partial mass flow measured values X m1 and to output them to the measuring transducer circuit DSV2, and wherein the measuring transducer circuit DSV2 is set up to receive and process both the vibration measurement signal s43 from the vibration sensor 43 and the vibration measurement signal s44 from the vibration sensor 44 as well as partial mass flow measured values X m1 output by the measuring transducer circuit DSV1, namely to determine, in particular digital, total flow measured values X m representing a total mass flow m of the medium FL flowing through the first, second, third and fourth pipes 111, 112, 121, 122.Accordingly, the measuring transducer circuit DSV1 can also be configured in particular to determine the aforementioned phase difference Δφ12 between the vibration measurement signals s41, s42 and, based thereon, to calculate the partial mass flow measurement values X m1, and the measuring transducer circuit DSV2 can also be configured in particular to determine the aforementioned phase difference Δφ34 between the vibration measurement signals s43, s44 and to include it in the calculation of the total mass flow measurement values X m.

[0045] According to a further embodiment of the invention, it is further provided that both the vibration sensor 41 and the vibration sensor 42 are each electrically connected only or exclusively to the measuring transducer circuit DSV1 and that both the vibration sensor 43 and the vibration sensor 44 are each electrically connected only or exclusively to the measuring transducer circuit DSV2.According to a further embodiment of the invention, the measuring transducer circuit DSV1 is configured to process the vibration measurement signals s41, s42 as well as to control the driver circuit Exc1, for example, namely to calculate setpoint values for generating the driver signal e31 based on the first and / or second vibration measurement signals and to transmit them to the driver circuit Exc1, and / or the measuring transducer circuit DSV2 is configured to process the vibration measurement signals s43, s44 as well as to control the driver circuit Exc2, for example, namely to calculate setpoint values for generating the driver signal e32 based on the third and / or fourth vibration measurement signals and to transmit them to the driver circuit Exc2.In addition, the driver circuit Exc1 can also be configured to determine amplitude values representing a signal amplitude of the driver signal e31 and to output them to the measuring transducer circuit DSV1 and / or the driver circuit Exc2 can also be configured to determine amplitude values representing a signal amplitude of the driver signal e32 and to output them to the measuring transducer circuit DSV2. In addition, the measuring transducer circuit DSV1 can also be configured to transmit setpoint values for generating the driver signal e31 and / or amplitude values received from the driver circuit Exc1 for the signal amplitude of the driver signal e31 to the measuring transducer circuit DSV2 and the measuring transducer circuit DSV2 can also be configured toto receive and process the same amplitude values, for example, namely to include them in the calculation of the aforementioned viscosity measurement values X η together with setpoint values for generating the driver signal e32 and / or with amplitude values for the signal amplitude of the driver signal e32. Accordingly, for example, the driver circuit Exc1 can be electrically connected to the transducer circuit DSV1 and / or the driver circuit Exc2 can be electrically connected to the transducer circuit DSV2 and / or the transducer circuit DSV1 can be electrically connected to the transducer circuit DSV2, for example, via one or more data buses of the measuring and operating electronics. According to a further embodiment of the invention, it is further provided that the driver circuit Exc1 is not electrically connected to the transducer circuit DSV2 and / or that the driver circuit Exc2 is not electrically connected to the transducer circuit DSV1.Each of the two measuring transducer circuits DSV1, DSV2 can also be formed, for example, by means of its own microprocessor. Accordingly, according to a further embodiment of the invention, the measuring transducer circuit DSV1 is formed by means of a first microprocessor µC1 and the measuring transducer circuit is formed by means of a second microprocessor µC2 - for example, also identical in construction to the microprocessor µC1. According to a further embodiment of the invention, the measuring transducer circuit DSV2 is furthermore also designed to use the third and fourth vibration measurement signals s43, s44 to determine a mass flow m2 of the measuring medium FL34 flowing through the third and fourth pipes 121, 122, in particularto determine digital, second partial mass flow measured values X m2, for example to determine the total flow measured values X m using also the same partial mass flow measured values X m2, for example by repeatedly summing a current second partial mass flow measured value with a temporally matching first partial mass flow measured value.

[0046] As already mentioned, the measuring system according to the invention can also be configured to measure a density of the medium. Accordingly, according to a further embodiment of the invention, the measuring transducer circuit DSV1 is further configured to determine, based on at least one of the first and second vibration measurement signals s41, s42, first partial density measurement values X ρ1 representing a density ρ1 of the medium FL12 flowing through the first and second tubes 111, 112, in particular digital ones, and to output them to the measuring transducer circuit DSV2. The measuring transducer circuit DSV2 can in turn also be set up to receive partial density measured values X ρ1 output by the measuring transducer circuit DSV1 and, based on the same partial density measured values X ρ1 and at least one of the third and fourth vibration measuring signals s43, s44, to determine a density ρ of the medium flowing through the pipes 111, 112, 121, 122 orto determine, in particular digital, total density measured values X ρ, representing, for example, an average density of the medium FL flowing through the pipe arrangement formed thereby. Alternatively or additionally, the measuring transducer circuit DSV2 can also be configured to determine, based on at least one of the third and fourth vibration measuring signals s43, s44, second partial density measured values X ρ2, representing, in particular, digital, a density ρ2 of the medium FL34 flowing through the third and fourth pipes 121, 122, for example, to also receive the aforementioned partial density measured values X ρ1 output by the measuring transducer circuit DSV1 and to determine the aforementioned total density measured values X ρ based on (time-matching) first and second partial density measured values X ρ1, X ρ2.

[0047] To further improve the accuracy with which the measured values, not least the aforementioned partial density measured values X ρ1 , X ρ2 or the aforementioned total density measured values X ρ , the sensor arrangement - as in Fig. 3B schematically shown - according to a further embodiment of the invention at least two, for example also identical and / or spaced apart, temperature sensors (51, 52, 53), of which a first temperature sensor 51 is mechanically connected to - in particular exactly - one of the tubes 111, 112, 121, 122 of the tube arrangement and -- as also in Fig. 7 indicated - electrically, in particular only or exclusively, connected to the measuring transducer circuit DSV2, and of which a second temperature sensor 52 is also mechanically connected to - in particular exactly - one of the tubes 111, 112, 121, 122 and -- as also in Fig. 7 indicated - electrically, in particular solely or exclusively, connected to the measuring transducer circuit DSV2. Each of the aforementioned temperature sensors 51, 52 is further configured to detect a temperature of the pipe mechanically connected thereto and to provide a first or second temperature measurement signal θ51, θ52 representing the same temperature, in particular electrically. The temperature sensor 51, 52 can, for example, be attached to the pipe 111 and the temperature sensor 52 can be attached to another of the pipes, for example also in such a way that the temperature sensors 51, 52 are each positioned at the same distance from the flow divider 21 and / or in its vicinity; the temperature sensors 51, 52 can - as in Fig. 3B shown - but can also be attached to the same pipe and / or positioned so that - as in Fig. 3B indicated - the temperature sensor 51 is equidistant from the flow divider 21 as the temperature sensor 52 is from the flow divider 22. The measuring transducer circuit DSV2 is in turn also configured to receive and process the first temperature measurement signal θ51 from the temperature sensor 51, namely to determine the first temperature measurement value X θ1 recorded by the temperature sensor 51 and representing a temperature dependent thereon, in particular digital. In addition, the measuring transducer circuit DSV2 is also configured to receive and process the second temperature measurement signal θ52 from the temperature sensor 52, namely to determine the second temperature measurement value X θ2 recorded by the temperature sensor 52 or representing a temperature dependent thereon, in particular digital.According to a further embodiment of the invention, the measuring transducer circuit DSV2 is also designed to determine the total mass flow measured values and / or the aforementioned total density measured values X ρ also using the aforementioned temperature measured values X θ1 , X θ2 . In addition, the measuring transducer circuit DSV2 can also be set up to output at least the temperature measured values X θ1 or each of the temperature measured values X θ1 , X θ2 to the measuring transducer circuit DSV1 and the measuring transducer circuit DSV1 can then be set up accordingly to receive and evaluate temperature measured values output by the measuring transducer circuit DSV2, for example to determine the partial mass flow measured values X m1 and / or the aforementioned partial density measured values X ρ1 also using at least the temperature measured values X θ1 , if necessary also using both the temperature measured values X θ1 and the temperature measured values X θ2.In addition, the measuring transducer circuit DSV2 can be further configured to determine a measuring medium temperature measured value X θFL representing a temperature of the measuring medium FL based on the temperature measuring signals θ51, θ52 or the temperature measuring values X θ1, X θ2.

[0048] According to another embodiment of the invention, the sensor arrangement has at least one third temperature sensor 53, which - as in Fig. 3B indicated - mechanically connected to the converter housing 200 and electrically, for example only or exclusively, to the measuring transducer circuit DSV2 and is also designed to detect a temperature of the converter housing and to provide a third temperature measurement signal θ53 representing the same temperature, in particular an electrical one. The measuring transducer circuit DSV2 can - as in Fig. 7 indicated - further be configured to receive and process the temperature measurement signal θ53 from the temperature sensor 53, namely to determine the temperature detected by the temperature sensor 53 or a third temperature measurement value X θ3 representing a temperature dependent thereon, in particular a digital one. According to a further embodiment of the invention, the measuring transducer circuit DSV2 is also configured to determine the total mass flow measurement values and / or the aforementioned total density measurement values X ρ and / or the aforementioned medium temperature measurement values X θFL also using the same temperature measurement values X θ3.In addition, the measuring transducer circuit DSV2 can also be configured to output the temperature measured values X θ3 to the measuring transducer circuit DSV1 and the measuring transducer circuit DSV1 can then be configured accordingly to receive and evaluate temperature measured values X θ3 output by the measuring transducer circuit DSV2, for example to determine the partial mass flow measured values X m1 and / or the aforementioned partial density measured values X ρ1 also using at least the temperature measured values X θ3.

[0049] As from the Fig. 6 As can be seen, in the measuring and operating electronics ME, according to a further embodiment of the invention, an interface circuit COM is also provided which is used to output (xm) measured values, for example digital values and / or values determined by means of the measuring transducer circuit DSV2, for example the total mass flow measured values X m , and in particular is electrically connected to the measuring transducer circuit DSV2.Accordingly, according to a further embodiment of the invention, the measuring transducer circuit DSV2 is further configured to output the total flow measured values X m determined thereby to the interface circuit COM, and the interface circuit is additionally configured to receive the total mass flow measured values X m output by the measuring transducer circuit DSV2 and to convert them into a mass flow output signal x m providing the same total mass flow measured values X m and compliant, for example, with an industry standard, for example DIN IEC 60381-1:1985-11, IEC 61784-1 CPF1 (Foundation Fieldbus), IEC 61784-1 CPF3 (Profibus), IEC 61158, or IEC 61784-1 CPF9 (HART). For this purpose, the interface circuit COM can, for example, also be electrically connected to the measuring transducer circuit DSV2, although not to the measuring transducer circuit DSV1.In addition, the measuring transducer circuit DSV2 can also be set up to output the aforementioned total density measured values X ρ and / or the aforementioned medium temperature measured values X θFL to the interface circuit COM and the interface circuit COM can accordingly also be set up to convert the same total density measured values X ρ or the aforementioned medium temperature measured values X θFL into a density output signal x ρ or temperature output signal x θ, for example, which conforms to one of the aforementioned industrial standards.

[0050] The measuring and operating electronics ME can, as in Fig. 1 , 2A und 2BAs indicated in each case, the electronics protective housing 100 may also be housed in an electronics protective housing 100, in particular one that is explosion-proof or pressure-resistant and / or protects the measuring and operating electronics ME at least against splash water; this is particularly the case in such a way that both the driver circuits Exc1, Exc2 and the measuring transducer circuits DSV1, DSV2, in particular also the aforementioned interface circuit COM, are housed in the electronics protective housing 100.

Claims

1. A vibronic measuring system, in particular a Coriolis mass flow meter or Coriolis mass flow / density meter, for measuring and / or monitoring at least one, in particular time-variable, flow parameter, in particular a mass flow, a volume flow and / or a flow velocity, and / or for measuring and / or monitoring at least one, in particular time-variable, substance parameter, in particular a density and / or a viscosity, of a flowing measured substance, in particular a gas, a liquid or a dispersion, said measuring system comprising: - A measuring transducer (MW) • with a tube arrangement for conducting the flowing fluid, • with an exciter arrangement for converting electrical power into mechanical power serving to excite and maintain forced mechanical oscillations of the tube arrangement, • and with a sensor arrangement for detecting mechanical oscillations of the tube arrangement and for supplying oscillation measurement signals each representing oscillatory movements of the tube arrangement; - and also measuring and operating electronics (ME) electrically coupled to the measuring transducer (MW), that is to say both to its exciter arrangement and its sensor arrangement, in particular by means of electrical connecting cables, • with a first driver circuit (Exc1) for providing electrical power for the exciter arrangement, • with a first transmitter circuit (DSV1) for processing oscillation measurement signals from the sensor arrangement and for actuating the first driver circuit, • with a second driver circuit (Exc2) for providing electrical power for the exciter arrangement, • and with a second transmitter circuit (DSV2) for processing oscillation measurement signals from the sensor arrangement and for actuating the second driver circuit; - wherein the tube arrangement has • a first flow divider (21), in particular serving as a line branch and / or on the inlet side, in particular with precisely four flow openings, • a second flow divider (22), in particular of identical design to the first flow divider (21) and / or serving as a line junction and / or on the outlet side, in particular with precisely four flow openings, • as well as four tubes which are only identical in design pairwise, that is to say ▪ a first tube (111), in particular curved at least in sections, ▪ a second tube (121) that is identical in design to the first tube, ▪ a third tube (112), in particular curved at least in sections, ▪ as well as a fourth tube (122) that is identical in design only to the third tube, • wherein each of the first, second, third, and fourth tubes in the tube arrangement extends in each case from a respective first end of the respective tube to a respective second end of said tube with a respective tube length and has in each case a lumen surrounded by an, in particular metal, tube wall and extending in each case from the respective first end of the respective tube to the respective second end of said tube, • wherein each of the first, second, third, and fourth tubes in the tube arrangement is connected in each case to each of the first and second flow dividers in such a way that ▪ the first tube opens with its first end into a first flow opening of the first flow divider (21) and with its second end into a first flow opening of the second flow divider (22), ▪ the second tube opens with its first end into a second flow opening of the first flow divider (21) and with its second end into a second flow opening of the second flow divider (22), ▪ the third tube opens with its first end into a third flow opening of the first flow divider (21) and with its second end into a third flow opening of the second flow divider (22), ▪ and the fourth tube opens with its first end into a fourth flow opening of the first flow divider (21) and with its second end into a fourth flow opening of the second flow divider (22), ▪ and wherein each of the first, second, third, and fourth tubes of the tube arrangement in each case is configured to have the measured substance flow through it and during that to be caused to oscillate; - wherein the exciter arrangement has two, in particular electrodynamic and / or identical in design, oscillation exciters (31, 32) of which • a first oscillation exciter (31) is mechanically connected both to the first tube and the second tube and electrically connected, in particular only, to the first driver circuit • and a second oscillation exciter (32) is mechanically connected both to the third tube and the fourth tube and electrically connected, in particular only, to the second driver circuit, • wherein each of the first and second oscillation exciters (31, 32) is in each case configured to convert electrical power into mechanical power; - wherein the first driver circuit is configured to generate an electrical first driver signal (e31) and thereby to feed electrical power, in particular only, to the first oscillation exciter (31) in such a way that the first and second tubes carry out useful oscillations at least in part, that is to say mirror-inverted forced mechanical oscillations with at least a first useful frequency, that is to say an oscillation frequency specified by the first driver signal, in particular corresponding to a first resonant frequency of the tube arrangement, which are suitable for effecting Coriolis forces dependent on the mass flow in the measured substance flowing through each of the first and second tubes, - and wherein the second driver circuit is configured to generate an electrical second driver signal (e32) and thereby to feed electrical power, in particular only, to the second oscillation exciter (32) in such a way that the third and fourth tubes carry out useful oscillations at least in part, that is to say mirror-inverted forced mechanical oscillations with at least a second useful frequency, that is to say an oscillation frequency specified by the second driver signal, in particular corresponding to a second resonant frequency of the tube arrangement, which are suitable for effecting Coriolis forces dependent on the mass flow in the measured substance flowing through each of the third and fourth tubes; - wherein the sensor arrangement has four oscillation sensors, in particular electrodynamic and / or identical in design, and / or spaced apart from one another, of which • a first oscillation sensor and a second oscillation sensor are mechanically connected in each case both to the first tube and the second tube and electrically connected in each case, in particular only, to the first transmitter circuit • and a third oscillation sensor and a fourth oscillation sensor are mechanically connected in each case both to the third tube and the fourth tube and electrically connected in each case, in particular only, to the second transmitter circuit, • wherein each of the first, second, third, and fourth oscillation sensors is in each case configured to detect oscillatory movements of the first, second, third, and fourth tubes mechanically connected thereto and to supply an, in particular electrical, first, second, third or fourth oscillation measurement signal representing said oscillatory movements; - wherein the first transmitter circuit is configured to receive and process both the first oscillation measurement signal from the first oscillation sensor and the second oscillation measurement signal from the second oscillation sensor, that is to say to determine first, in particular digital, partial mass flow measured values (Xm1) representing a mass flow, m1, of the measured substance flowing through the first and second tubes and to output these to the second transmitter circuit, - and wherein the second transmitter circuit is configured to receive and process both the third oscillation measurement signal from the third oscillation sensor and the fourth oscillation measurement signal from the fourth oscillation sensor, as well as first partial mass flow measured values output by the first transmitter circuit, that is to say to determine, in particular digital, total flow measured values (Xm) representing a total mass flow, m, of the measured substance flowing through the first, second, third, and fourth tubes.

2. The measuring system as claimed in the preceding claim, - wherein the first driver circuit is electrically connected to the first transmitter circuit, in particular via a data bus, in particular is not electrically connected to the second transmitter circuit; and / or - wherein the second driver circuit is electrically connected to the second transmitter circuit, in particular via a data bus, in particular is not electrically connected to the first transmitter circuit; and / or - wherein the first transmitter circuit and the second transmitter circuit are electrically connected to each other, in particular via a data bus; and / or - wherein the first transmitter circuit is formed by a first microprocessor and the second transmitter circuit by a second microprocessor.

3. The measuring system as claimed in one of the preceding claims, wherein the second transmitter circuit is configured, using the third and fourth oscillation measurement signals, to determine second, in particular digital, partial mass flow measured values (Xm2) representing a mass flow, m2, of the measured substance flowing through the third and fourth tubes, that is to say, in particular to determine the total flow measured values also using second partial mass flow measured values.

4. The measuring system as claimed in one of the preceding claims, wherein the sensor arrangement has at least two temperature sensors, in particular identical in design and / or spaced apart from one another, of which - a first temperature sensor is mechanically connected to one of the first, second, third, and fourth tubes, that is to say, in particular to the first tube or to the second tube, and is in each case electrically connected, in particular only, to the second transmitter circuit, - and a second temperature sensor is mechanically connected to one of the first, second, third, and fourth tubes, that is to say, in particular to the same tube as the first temperature sensor, and is in each case electrically connected, in particular only, to the second transmitter circuit, - wherein each of the first and second temperature sensors is in each case configured to detect a temperature of the first, second, third, and fourth tubes mechanically connected thereto and to supply an, in particular electrical, first or second temperature measurement signal representing said temperature.

5. The measuring system as claimed in the preceding claim, wherein the second transmitter circuit is configured to receive and process the first temperature measurement signal from the first temperature sensor, that is to say to determine first, in particular digital, temperature measured values representing the temperature detected with the first temperature sensor or a temperature dependent thereon.

6. The measuring system as claimed in the preceding claim, wherein the second transmitter circuit is configured to receive and process the second temperature measurement signal from the second temperature sensor, that is to say to determine second, in particular digital, temperature measured values representing the temperature detected with the second temperature sensor or a temperature dependent thereon.

7. The measuring system as claimed in the preceding claim, - wherein the second transmitter circuit is configured to determine the total mass flow measured values, also using the first and second temperature measured values, and to output at least the first temperature measured values, in particular the first and second temperature measured values, to the first transmitter circuit, - and wherein the first transmitter circuit is configured to receive and analyze temperature measured values output by the second transmitter circuit, that is to say, in particular to determine the first partial mass flow measured values and / or the first partial density measured values, also using at least the first temperature measured values.

8. The measuring system as claimed in one of the preceding claims, further comprising: A transducer housing that encloses the first, second, third, and fourth tubes, wherein the transducer housing has at least one, in particular hermetically sealed, cavity and wherein each of the first, second, third, and fourth tubes is arranged within said cavity.

9. The measuring system as claimed in the preceding claim, - wherein the sensor arrangement has at least a third temperature sensor; - wherein the third temperature sensor is mechanically connected to the transducer housing and electrically connected, in particular only, to the second transmitter circuit and is configured to detect a temperature of the transducer housing and to supply an, in particular electrical, third temperature measurement signal representing said temperature; - wherein the second transmitter circuit is configured to receive and process the third temperature measurement signal from the third temperature sensor, that is to say to determine third, in particular digital, temperature measured values representing the temperature detected with the third temperature sensor or a temperature dependent thereon - and wherein the second transmitter circuit is configured to determine the total mass flow measured values, also using the third temperature measured values.

10. The measuring system as claimed in the preceding claim, - wherein the second transmitter circuit is configured to output the third temperature measured values to the first transmitter circuit, - and wherein the first transmitter circuit is configured to receive and analyze the third temperature measured values, that is to say to determine the first mass flow measured values, also using the third temperature measured values.

11. The measuring system as claimed in one of the preceding claims, further comprising: An, in particular explosion-proof and pressure-resistant, electronics protective housing (100), for housing both the first and second driver circuits as well as the first and second transmitter circuits, in particular so that they are protected against spray.

12. The measuring system as claimed in one of the preceding claims, wherein the measuring and operating electronics (ME) further comprise: An interface circuit (COM) for outputting measured values, in particular digital ones and / or ones determined using the second transmitter circuit.

13. The measuring system as claimed in the preceding claim, - wherein the interface circuit is electrically connected to the second transmitter circuit, but in particular is not electrically connected to the first transmitter circuit; and / or - wherein the second transmitter circuit is configured to output total flow measured values determined using it to the interface circuit, - and wherein the interface circuit is configured to receive total mass flow measured values output by the second transmitter circuit and to convert them into a mass flow output signal (xm) supplying said total mass flow measured values, in particular one which complies with an industry standard.

14. The measuring system as claimed in one of the preceding claims, - wherein the first transmitter circuit is configured to determine first, in particular digital, partial density measured values representing a density, p1, of the measured substance flowing through the first and second tubes, based on at least one of the first and second oscillation measurement signals, and to output these to the second transmitter circuit; and / or - wherein the second transmitter circuit is configured to receive first partial density measured values output by the first transmitter circuit and to determine, in particular digital, total density measured values representing a density, p, of the measured substance flowing through the first, second, third, and fourth tubes, based on first partial density measured values, as well as at least one of the third and fourth oscillation measurement signals; and / or - wherein the second transmitter circuit is configured to determine, in particular digital, second partial density measured values representing a density, p2, of the measured substance flowing through the third and fourth tubes, based on at least one of the third and fourth oscillation measurement signals, and to receive first partial density measured values output by the first transmitter circuit, and to determine, in particular digital, total density measured values representing an, in particular average, density, p, of the measured substance flowing through the first, second, third, and fourth tubes, based on first and second partial density measured values.