EP3563123A1 - VIBRONISCHES MEßSYSTEM ZUM MESSEN EINER MASSENDURCHFLUßRATE - Google Patents
VIBRONISCHES MEßSYSTEM ZUM MESSEN EINER MASSENDURCHFLUßRATEInfo
- Publication number
- EP3563123A1 EP3563123A1 EP17822141.2A EP17822141A EP3563123A1 EP 3563123 A1 EP3563123 A1 EP 3563123A1 EP 17822141 A EP17822141 A EP 17822141A EP 3563123 A1 EP3563123 A1 EP 3563123A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tube
- temperature
- measuring
- temperature sensor
- wall
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/76—Devices for measuring mass flow of a fluid or a fluent solid material
- G01F1/78—Direct mass flowmeters
- G01F1/80—Direct mass flowmeters operating by measuring pressure, force, momentum, or frequency of a fluid flow to which a rotational movement has been imparted
- G01F1/84—Coriolis or gyroscopic mass flowmeters
- G01F1/8409—Coriolis or gyroscopic mass flowmeters constructional details
- G01F1/8436—Coriolis or gyroscopic mass flowmeters constructional details signal processing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/74—Devices for measuring flow of a fluid or flow of a fluent solid material in suspension in another fluid
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/76—Devices for measuring mass flow of a fluid or a fluent solid material
- G01F1/78—Direct mass flowmeters
- G01F1/80—Direct mass flowmeters operating by measuring pressure, force, momentum, or frequency of a fluid flow to which a rotational movement has been imparted
- G01F1/84—Coriolis or gyroscopic mass flowmeters
- G01F1/845—Coriolis or gyroscopic mass flowmeters arrangements of measuring means, e.g., of measuring conduits
- G01F1/8468—Coriolis or gyroscopic mass flowmeters arrangements of measuring means, e.g., of measuring conduits vibrating measuring conduits
- G01F1/8472—Coriolis or gyroscopic mass flowmeters arrangements of measuring means, e.g., of measuring conduits vibrating measuring conduits having curved measuring conduits, i.e. whereby the measuring conduits' curved center line lies within a plane
- G01F1/8477—Coriolis or gyroscopic mass flowmeters arrangements of measuring means, e.g., of measuring conduits vibrating measuring conduits having curved measuring conduits, i.e. whereby the measuring conduits' curved center line lies within a plane with multiple measuring conduits
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/02—Compensating or correcting for variations in pressure, density or temperature
- G01F15/022—Compensating or correcting for variations in pressure, density or temperature using electrical means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/02—Compensating or correcting for variations in pressure, density or temperature
- G01F15/022—Compensating or correcting for variations in pressure, density or temperature using electrical means
- G01F15/024—Compensating or correcting for variations in pressure, density or temperature using electrical means involving digital counting
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
- G01F25/10—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of flowmeters
Definitions
- the invention relates to a, esp. For measuring a physical quantity of a measured in one
- Pipe flowing fluid useful, vibronic measuring system In industrial measuring and automation technology, highly precise determination of measured values for at least one physical measured variable of a fluid flowing in a pipeline - for example a substance parameter, such as a density, and / or a flow parameter, such as a mass flow rate, of a gas Liquid or a dispersion - often vibronic, namely formed by a vibronic transducer device used measuring systems.
- vibronic measuring systems have also been established in which the transducer device comprises at least two tubes each having a lumen surrounded by a mostly metallic wall, each of which extends from a respective inlet-side first end to a respective outlet-side second end.
- Pipes adapted to be flowed through from the respective first end in the direction of the respective outlet-side second end, at least by a partial volume of the fluid to be measured and vibrated during which, and in which the transducer device to both the active stimulation and the evaluation of mechanical vibrations of the pipes useful, for example, by means of at least one microprocessor formed, measuring and operating electronics is connected.
- the respective measuring and operating electronics can also be electrically connected via corresponding electrical lines to a superordinate electronic data processing system, which is usually arranged remotely and usually spatially distributed, to which the measured values generated by the respective measuring system are connected by means of at least one of these according to carrying measured value signal in real time, for example, in real time, to be passed.
- Measuring systems of the type in question are also usually provided by means of a provided within the parent data processing system
- Process controllers connected, for example, locally installed programmable logic controllers (PLC) or installed in a remote control room process control computers, where the generated by means of the respective measuring system and suitably digitized and encoded accordingly measured values are sent.
- PLC programmable logic controllers
- the transmitted measured values can be further processed and used as corresponding measurement results, e.g. Visualized on monitors and / or in control signals for other trained as actuators
- Measuring arrangements usually monitored directly from such host computers and, where appropriate can be controlled and / or configured, in a corresponding manner via the aforementioned, mostly in terms of transmission physics and / or the transmission logic hybrid
- the data processing system usually also serves to condition the measured value signal supplied by the measuring system in accordance with the requirements of downstream data transmission networks, for example suitably digitizing and, if appropriate, converting it into a corresponding telegram and / or evaluating it on site.
- electrically coupled evaluation circuits are provided in such data processing systems with the respective connecting lines, which pre-process and / or further process the measured values received from the respective measuring system and, if necessary, convert them appropriately.
- For data transmission serve in such industrial data processing systems at least in sections, especially serial, field buses, such. FOUNDATION FIELDBUS,
- measured values can also be transmitted wirelessly to the respective data processing system.
- superordinate data processing systems usually also have the supply of the measured values supplied by the respectively connected measuring system.
- a supply circuit can be assigned to exactly one measuring system or corresponding electronics and, for example, to a corresponding evaluation circuit, together with the evaluation circuit assigned to the respective measuring system
- Fieldbus adapter united - in a common e.g. be designed as DIN rail module trained, electronics housing.
- Housing electronics housings and to wire together via external lines accordingly.
- Such a converter device in each case has an electro-mechanical exciter arrangement formed by means of at least one, for example electrodynamic, vibration generator, which is set up for useful oscillations of the at least two tubes, namely mechanical oscillations with at least one predeterminable oscillation frequency of the tubes around each respective associated static oscillator
- this electrodynamic vibration exciter namely by means of a permanent magnet fixed to one of the tubes and by means of a fixed to another of the tubes and with the
- vibrations of the tubes are those vibrations which are suitable to induce in the flowing fluid of a mass flow rate (m) dependent Coriolis forces, possibly also those which are suitable in the flowing fluid of a viscosity ( ⁇ ) dependent friction or
- Resonant frequencies selected, typically a common resonance frequency of a bending vibration fundamental mode of each of the tube.
- the transducer device used in vibronic measuring systems of the type in question also each have one formed by at least two, for example electrodynamic or optical, vibration sensors
- Vibration sensor arrangement which is set up for at least two oscillation signals, namely one, in particular the same, oscillatory movements of the at least two tubes representing electrical measurement signal, for example, with a dependent of a speed of vibration movements of the tubes or a corresponding oscillation frequency electrical (signal) AC voltage to generate; this in particular in such a way that between the at least two vibration signals dependent on the mass flow rate Phase difference exists or such that each of the at least two vibration signals has a signal frequency corresponding to an oscillation frequency of the at least two tubes.
- Converter devices are spaced apart from one another on the two tubes such that one of the vibration sensors is positioned less far from the respective first end of each of the tubes to form an inlet side first vibration sensing than from the respective second end and the other of the vibration sensors to form a vibration sensor outlet side second Schwingungsmeßstelle less far from the respective second end of each of the tubes is positioned away from the respective first end.
- converter devices of the type in question typically each comprise a cavity which is enveloped by a wall, for example a metallic wall
- Transducer housing within which at least two tubes including the attached components of at least the vibration exciter and the at least one
- Vibration sensor are arranged in one of the above-described vibrations of the pipes enabling manner, namely, that between one of the cavity facing inner surface of the wall of the converter housing and a lateral surface of the wall of each of the tubes, namely one of the cavity respectively facing outer surface of the respective wall of each Tubes on - usually filled with air or an inert gas - gap is formed.
- the respective measuring and operating electronics is typically within at least one
- The, for example, made of stainless steel or aluminum, electronics housing can be located away from the transducer device and connected to this via a flexible cable; but it can also for example, directly on the wall lervoriques, for example, arranged or fixed to the aforementioned converter housing.
- the measuring and operating electronics of such vibronic measuring systems are further adapted to receive and process each of the at least two vibration signals, for example to digitize and evaluate them.
- the measuring and operating electronics using the at least two vibration signals recurrently generates a
- Mass flow measured value namely, a measured value representing the mass flow rate, or generates the measuring and operating electronics using the at least two
- Vibration signals a mass flow sequence, namely a sequence of temporally successive, each representing the mass flow rate of the fluid currently representing
- the measuring and operating electronics of vibronic measuring systems of the type described above typically also serve to generate at least one, for example harmonic and / or clocked, drive signal for the at least one electro-mechanical vibration exciter.
- the same driver signal can, for example, with respect to a current and / or a
- the measuring and operating electronics is usually realized by means of one or more, possibly also as a digital signal processors (DSP) trained microprocessors, such that the measuring and operating electronics the respective measured values for the at least one substance or
- DSP digital signal processors
- Conversion device for example, determined based on the at least two vibration signals obtained digital Abtats and inform of corresponding digital values, esp. Also in real time, provides.
- Measuring systems is another important for the operation, not least also for the precise determination of the measured values for the at least one material or the flow parameter (auxiliary) measured variable u.a. Also, a transducer temperature that is suitable, a thermodynamic state of the transducer device or its influence on that for the measurement of the at least one
- Transducer temperature be suitable, a dependence of the vibration characteristics of the at least two tubes or the vibration measurement of a spatial
- the same converter temperature is determined regularly in measuring systems of the type in question based on a detected on the wall of the at least one tube temperature.
- such transducer devices such as u.a. also shown in the aforementioned US-A 57 96 012, WO-A 2009/134268, WO-A 01/71290, WO-A 98/52000 or WO-A 98/02725, therefore further one or more by means of a arranged within the intermediate space, thus not in operation contacted by the temperature sensor in the lumen of the respective tube,
- a platinum measuring resistor, a thermistor or a thermocouple formed temperature sensors, wherein the respective temperature sensor is in each case thermally coupled to the wall of the respective pipe and electrically coupled to the measuring and operating electronics.
- the temperature sensor can be formed by means of a single temperature sensor or even by means of a plurality of such temperature-sensitive electrical or electronic components formed electrical circuits, such as in the form of a Wheatstone measuring bridge.
- the at least one temperature sensor is arranged to correspond to a temperature at a temperature measuring point formed by means of the respective temperature sensor
- Measuring point temperature in a corresponding Temperaturmeßsignal namely an electrical measurement signal representing the respective measuring point temperature, for example, with an electrical signal voltage dependent on n crafter Meßstellenentemperatur and / or a n crafter of the same temperature Meßstelleentemperatur electrical signal current to convert.
- the measuring and operating electronics can also be set up to generate measured values for the at least one measured variable using at least one temperature measuring signal generated by means of the converter device.
- Mass flow measurements occasionally surprisingly high measurement errors, for example, more than 0.05% or more than 1 kg / h, can be observed.
- the predefined temperature difference ⁇ & is regularly greater than with an intact transducer device or with intact tube or intact tubes, in particular with a wall not covered by a lining, and otherwise identical boundary conditions, Nevertheless, it can not do any more for the actually high measuring accuracy
- WO-A 2016/058745 shown vibronic measuring system is the associated transducer device for reducing such measurement errors tempered before the actual measurement, namely brought to a steady operating temperature, the one during the actual measurement to
- expected fluid temperature or a corresponding thermal Equivalent equilibrium state is a liquid to be measured suitably conditioned in advance, for example, vented. This is done here by a corresponding
- the measuring system has an additional, yet complex valve control and additional supply or return fluid lines.
- further investigations on conventional transducer devices used in such a manner or subjected to measurement conditions in the laboratory have furthermore shown that the above-described phase difference between the at least two
- Conversion device or actually stationary measurement conditions in a considerable, namely the measurement accuracy significantly impairing extent can scatter; this in particular even at low Reynolds numbers (Re) of less than 1000 having, in particular laminar, or held constant at less than 1 kg / h, for example, zero, amounting mass flow rate fluid flows.
- Re Reynolds numbers
- the calculation bearing on an object of the invention is to improve a measurement accuracy of measuring systems of the aforementioned type so that the thus for flowing fluids with low specific heat capacity and / or with a significantly deviating from an ambient temperature fluid temperature and / or thus for Fluid flow measurements with mass flow rates determined to be low Reynolds numbers ( ⁇ 1000) or less than 1 kg / h reproducibly have a low measurement error, in particular of less than 0.05% and / or less than 1 kg / h ,
- the invention consists in a vibronic measuring system for measuring a mass flow rate of, esp. In a pipeline, flowing fluid, esp. A gas, a liquid or a dispersion.
- the measuring system comprises a, in particular.
- a microprocessor and / or a digital signal processor formed, measuring and operating electronics and electrically coupled with n termeer measuring and operating electronics, esp. Also
- the converter device comprises:
- a first tube provided with a lumen surrounded by, for example, a metallic wall, extending from an inlet-side first end to an outlet-side second end and adapted for fluid from the inlet-side first end toward the outlet-side second end, to be flowed through and vibrated while;
- a straight lumen which has a lumen enveloped by a wall and extends from an inlet-side first end to an outlet-side second end-for example at least sectionally curved and / or at least partially straight and / or the first tube of identical and / or parallel to the first tube - second tube, which is set up - for example, simultaneously to the first tube, from fluid, starting from the inlet-side first end in the direction of the outlet-side second end - flows through and while - for example, for example, to be vibrated simultaneously and / or counter to the first tube;
- Temperature sensor which is positioned less far from the first end of the first tube than the second end of the same first tube and provided for or
- a first measuring point temperature namely a temperature of the wall of the first tube at an inlet side first temperature measuring point formed by means of the same temperature sensor and a first temperature measuring signal, namely a first electrical measuring signal representing the first measuring point temperature, for example with one of the first measuring point temperature dependent electrical signal voltage and / or with one of the same first measuring point temperature-dependent electrical signal current to convert;
- Measuring point temperature namely to detect a temperature of the wall of the second tube at one formed by n intenden temperature sensor, remote from the first temperature measuring and / or outlet second second temperature measuring in a second temperature, namely a second Meßstellentemperatur
- Second electrical measurement signal for example, with a dependent of n termeer second measuring point temperature electrical signal voltage and / or with a second of the same measuring temperature dependent electrical signal current to convert;
- At least one, for example electrodynamic, vibration exciter for exciting and maintaining mechanical vibrations of both the first and the second tube to an associated static rest position, esp.
- End of the first tube is positioned away as the second end of the first tube and which is provided or arranged for, oscillatory movements of at least the first tube to an inlet side formed by means of the same vibration sensor first To detect vibration measuring and generate a same vibration oscillations representative first vibration signal;
- Vibration sensor identical, second vibration sensor for detecting mechanical oscillations of at least the first tube, which is positioned less far from the second end of the first tube than the same from the first end of the first tube and which is provided or furnished for vibration movements of at least the first tube at a to detect a second vibration signal formed by the same vibration sensor and to generate a second vibration signal representative of the same vibration vibration, such that there exists a phase difference between the first vibration signal and the second vibration signal, both from the mass flow rate and from a temperature between the first vibration sensor and a temperature identical second vibration sensor established, for example, at least temporarily with a
- Rate of change of more than 0.05 K / s time-varying, temperature difference is dependent.
- the measuring and operating electronics of the measuring system according to the invention is with each of the first and second vibration sensors as well as each of the first and second
- Temperature sensors and also electrically connected to the at least one vibration exciter are set up for effecting mechanical vibrations of both the first tube and the second tube by means of an electrical exciter signal electrical power in the at least vibration exciter
- the measuring and operating electronics are arranged, using each of the first and second vibration signals as well as each of the first and second temperature measuring signals, a mass flow sequence, namely a sequence of temporally successive, each representing the mass flow rate of the fluid currently
- Mass flow measured values to be generated such that at least for one
- Reference mass flow rate namely a predetermined, for example not more than 1 kg / h and / or held constant mass flow rate of a flowing through the converter device, for example, also laminar and / or with a Reynolds number of less than 1000 by the first and / or second pipe flowing and / or having a specific heat capacity greater than 1 kJ-kg _1 -K "1 and / or less than 4.2 kJ-kg _1 -K " 1 , reference fluids are the mass flow measurements from the temperature difference are independent.
- the invention also consists in the measuring system according to the invention for measuring an at least one physical measured variable, in particular a density and / or a viscosity and / or a mass flow rate and / or a volumetric flow rate, of a fluid, in particular in a pipeline, esp. Of a gas, a liquid or a flowable dispersion to use.
- an at least one physical measured variable in particular a density and / or a viscosity and / or a mass flow rate and / or a volumetric flow rate, of a fluid, in particular in a pipeline, esp. Of a gas, a liquid or a flowable dispersion to use.
- the mass flow measured values determined for the reference mass flow rate are independent of the temperature difference, in that for at least one non-zero but nonetheless constant reference mass flow rate successively determined mass flow measured values are also different, namely more than 1 K amounting to and / or less than 10 K and / or over time with a range of more than 1 K scattering and / or with a rate of change of more than 0.05 K / s time-varying temperature differences of not more than 0.01 % of reference mass flow rate differ,
- the mass flow measured values determined for the reference mass flow rate are independent of the temperature difference, in each case representing a scale zero point of the measuring and operating electronics, namely in each case in the case of a converter device through which no fluid flows or respectively for one
- Mass flow measured values even at different, nevertheless amounting to more than 1 K and / or less than 10 K and / or over time with a span of more than 1 K and / or less than 10 K scattering and / or with a rate of change of more than 0.05 K / s of time-varying temperature differences are less than 0.01 kg / h or less than 0.01 kg / h differ from each other.
- the, for example liquid or gaseous, reference fluid has a specific heat capacity of more than 1 kJ-kg _1 -K "1 and / or less than 4.2 kJ-kg " 1 -K "1 ,
- the reference fluid is a liquid
- the reference fluid is a gas, for example air.
- the reference fluid is water, esp. With a fluid temperature of not less than 20 ° C.
- the reference fluid is an oil, esp. With a fluid temperature of not less than 20 ° C and / or with a viscosity of more
- the reference fluid is an oil, for example with a fluid temperature of not less than 20 ° C and / or with a viscosity of more than 10 "2 Pa s (Pascal seconds) and is also provided that the reference Mass flow rate as a function of an amount
- of a nominal diameter of the converter device given in Sl basic unit for length (m meter) is less than
- the reference fluid is a gas, esp. With a fluid temperature of not less than 20 ° C and / or air.
- the reference fluid is a gas, for example having a fluid temperature of not less than 20 ° C and / or air, and is provided the reference mass flow rate as a function of an amount
- a specified nominal size of the nominal diameter specified in Sl basic unit for length (m meter)
- Converter device is less than
- the temperature difference in the case of an inner side facing the lumen is greater than that of an intact first tube, for example with a wall not affected by a covering, by an undesired lining of the first tube.
- the measuring and operating electronics are arranged using both the first oscillation signal and the second one
- Vibration signal to generate a phase difference sequence namely a sequence of temporally successive, each representing the phase difference phase difference measured values.
- the measuring and operating electronics are arranged to use, using both the first temperature measuring signal and the second temperature measuring signal, a temperature difference sequence, namely a sequence of times successive, each representing the temperature difference
- the measuring and operating electronics are arranged to use, using both the first temperature measuring signal and the second temperature measuring signal, a temperature difference sequence, namely a sequence of temporally successive ones, each representing the temperature difference
- Temperature difference sequence to monitor a functionality of the converter device, esp. Namely a functionality of the first tube and / or the second tube.
- the measuring and operating electronics is adapted, using both the first temperature and the second Temperaturmeßsignals a temperature difference sequence, namely a sequence of temporally successive, each representing the temperature difference
- the measuring and operating electronics is set up, using both the first temperature and the second Temperaturmeßsignals a temperature difference sequence, namely a sequence of temporally successive, each representing the temperature difference
- Temperature difference sequence to generate an alarm that signals only a limited functionality of the converter device, esp. Due to a comparison with an original flow resistance modified flow resistance of the first tube and / or the second tube.
- the measuring and operating electronics is arranged to set up the measuring and operating electronics for using both the first temperature measuring signal and the second temperature measuring signal
- Meßfluidtemperatur measured value namely to generate a temperature representative of a flowing through the first pipe and / or the second pipe measured value.
- the measuring and operating electronics is adapted to generate, using at least one of the vibration signals as well as at least one of the temperature measurement signals, a density measurement value representing a density of the fluid.
- the measuring and operating electronics are adapted to generate a viscosity reading representing at least one of the vibration signals and at least one of the temperature measurement signals, which represents a viscosity of the fluid.
- the measuring and operating electronics are arranged to generate a transducer temperature reading using both the first temperature measurement signal and the second temperature measurement signal
- Transducer temperature which differs from both the first measuring point temperature and the second measuring point temperature, such that an amount amämnten
- This refinement of the invention further provides that the measuring and operating electronics are set up using the first temperature measuring signal, but not the second temperature measuring signal, and / or using the second temperature measuring signal, but not the first one
- Transducer temperature represents at least approximately. According to a twenty-second embodiment of the invention it is provided that the measuring and
- Operating electronics has a multiplexer with at least two signal inputs and at least one signal output, which multiplexer is adapted to selectively, for example cyclically, Hartgate one of its signal inputs to the signal output, such that a present at each through-connected signal input signal is continued to the signal output ; and that the measuring and operating electronics having a, for example, a nominal resolution of more than 16 bits and / or "clocked with a more than 1000 s amount ends sampling, analog-to-digital converter with at least one signal input and at least one signal output has, which analog-to-digital converter is adapted to a signal applied to n beauem signal input analog input signal with, for example more than 1,000 amount ends s ", sampling rate and with a, for example, draw forming more than 16 bits, digital resolution in a n beaues input signal represent representative digital output signal and provide at the signal output.
- This embodiment of the invention
- the at least one signal output of the multiplexer and the at least one signal input of the analog-to-digital converter are electrically coupled to one another; and in that the first temperature sensor and the second temperature sensor are each electrically connected to the multiplexer, such that the first temperature measurement signal is applied to a first signal input of the multiplexer and that the second temperature measurement signal is applied to a second signal input of the multiplexer.
- Analog-to-digital converter at least temporarily represent exactly one of the two Temperaturmeßsignale or the measuring and operating electronics can generate the mass flow rate using the one of the two Temperaturmeßsignale representing output signal of the analog-to-digital converter.
- Temperature sensor is positioned less far from the first end of the first tube than the second temperature sensor from the first end of the second tube. According to a twenty-fourth embodiment of the invention it is provided that the second
- Temperature sensor is positioned less far from the second end of the second tube than the first temperature sensor from the second end of the second tube.
- Temperature sensor is positioned equidistant from the first end of the first tube as the second temperature sensor from the second end of the second tube.
- the first temperature sensor is positioned equidistant from the second end of the first tube as the second temperature sensor from the first end of the second tube.
- the first temperature sensor is positioned equidistant from a center of the first tube as the second temperature sensor is positioned from a center of the second tube.
- Temperature sensor and the second temperature sensor are identical.
- the first temperature sensor is mechanically coupled in the same way with the wall of the first tube as the second temperature sensor with the wall of the second tube.
- the converter device has no further wall of the first tube and / or no second wall of the second tube except the second temperature sensor
- Temperature sensor is coupled in the same way thermally conductive with the wall of the first tube as the second temperature sensor with the wall of the second tube, esp.
- a one of the wall of the first tube to the first temperature sensor and further to the first temperature sensor surrounding atmosphere flowing heat flow counteracting heat resistance is the same as a one of the wall of the second tube to the second temperature sensor and further to an ambient temperature surrounding the second temperature sensor heat flow counteracting heat resistance.
- Vibration sensor is thermally conductively coupled in the same way with the wall of the first tube and / or the wall of the second tube as the second vibration sensor;
- Vibration sensor and further to a surrounding the first vibration sensor atmosphere flowing heat flow counteracting heat resistance is equal to a one of the wall of the first tube to the second vibration sensor and on to the second vibration sensor surrounding atmosphere flowing heat flow counteracting thermal resistance and / or that one of the Wall of the second tube to the first vibration sensor and further to a surrounding the first vibration sensor flowing heat flow counteracting thermal resistance is equal to a one of the wall of the second tube to the second vibration sensor and further to a surrounding the second vibration sensor heat flow counteracting heat resistance.
- Vibration sensor arrangement mirror-symmetrical with respect to at least one
- Conversion device is imaginary cutting, in particular, parallel to a main axis of inertia of the first pipe, imaginary axis of symmetry.
- Temperature sensor arrangement mirror-symmetrical with respect to at least one Conversion device is imaginary cutting, in particular, parallel to a main axis of inertia of the first pipe, imaginary axis of symmetry.
- Temperature sensor is positioned equidistant from the first vibration sensor as the second temperature sensor from the second vibration sensor.
- the first tube is mirror-symmetrical with respect to at least one tube imaginarily intersecting, esp. Namely coincident with a main axis of inertia tube imaginary axis of symmetry.
- the first tube for example V-shaped or U-shaped, is curved. According to a thirty-eighth embodiment of the invention, it is provided that the first tube is at least partially, for example predominantly or even completely, straight, for example circular-cylindrical.
- the first tube is curved at least in sections, for example circular arc-shaped.
- the wall of the first tube is at least partially, for example also predominantly or wholly, made of a material, such as e.g. a metal or alloy, of which a specific thermal conductivity is greater than 10 W / (m ⁇ K), and of which a specific heat capacity is less than 1000 J / (kg ⁇ K).
- a material such as e.g. a metal or alloy, of which a specific thermal conductivity is greater than 10 W / (m ⁇ K), and of which a specific heat capacity is less than 1000 J / (kg ⁇ K).
- the wall of the first tube consists of metal, for example an alloy containing iron and / or aluminum and / or chromium and / or titanium and / or zirconium and / or tantalum and / or nickel.
- the wall of the first tube is made of stainless steel.
- the first tube has a caliber that is more than 0.1 mm (millimeters).
- the first tube has a caliber that is more than 1 mm (millimeters). According to a forty-fifth embodiment of the invention it is provided that a unwound tube length of the first tube is more than 300 mm. According to a forty-sixth embodiment of the invention, it is provided that the first tube and the second tube are identical in construction.
- the first temperature sensor by means of a, for example, a platinum measuring resistor, a thermistor or a thermocouple having, first temperature sensor and by means of a n personallyen first temperature sensor thermally conductively coupled to the wall of the first tube first
- Coupling body is formed, and that the second temperature sensor by means of - for example, a platinum measuring resistor, a thermistor or a thermocouple having and / or identical to the first temperature sensor - second temperature sensor and by means of a same second temperature sensor thermally conductively coupled to the wall of the second tube - for example, identical to the first coupling body - second coupling body is formed.
- This embodiment of the invention further provides that the first
- Coupling body for example, entirely, by means of a placed between the wall of the first tube and the first temperature sensor, esp. Both the outer surface of the wall and the first temperature sensor contacting and / or metal oxide particles offset,
- Plastic for example, an epoxy resin or a silicone
- the second coupling body for example, by means of a placed between the wall of the second tube and the second temperature sensor, esp. Both the outer surface of the wall and the second temperature sensor contacting and / or with metal oxide particles, plastic, for example an epoxy resin or a silicone, is formed.
- Coupling body cohesively for example, adhesive
- the second temperature sensor for example by means of a plantetisers, to form the second coupling body cohesively, for example adhesively bonded to the lateral surface of the wall of the second tube.
- this further comprises: an inlet-side first flow divider and an outlet-side second flow divider, wherein the first and the second tube fluidly connected to form under flow
- Flow paths can be connected to the, in particular identical, flow divider, such that the first tube with its first end in a first flow opening of the first flow divider and with its second end opens into a first flow opening of the second flow divider, and that 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 flow dividers can each be an integral part of a converter housing of the converter device.
- the latter further comprises: a transducer housing having a cavity surrounded by, for example, a metallic wall, wherein both the first and the second tubes are disposed within the cavity of the transducer housing such that between an inner surface of the wall of the converter housing facing the cavity, a lateral surface of the wall of the first tube facing the cavity and a lateral surface of the wall of the second tube facing the cavity
- Intermediate space is formed, and wherein the converter housing, the first tube and the second tube are adapted, in the intermediate space, in particular a specific thermal conductivity of less than 1 W / (m (K) having, fluid, for example air or an inert gas to hold a volume of fluid enveloping both the first and second tubes, such that the space facing the clearance of the wall of the first tube forms a first interface of a first type, namely an interface between a fluid and a solid Phase, and the space facing the peripheral surface of the wall of the second tube are contacted to form a second interface of the first type held in the space fluid.
- fluid for example air or an inert gas
- this further comprises: one, for example the connection of the converter device to a fluid supplying the
- Each of the connecting flanges also each have a sealing surface for fluid-tight or leak-free connection of the transducer device with a respective corresponding
- Sealing surfaces may define a, for example, more than 250 mm amount and / or less than 3000 mm amount, installation length of the transducer device, for example, such that a
- Tube length to installation length ratio of the transducer device defined by a ratio of a developed tube length of the first tube to the same installation length of the transducer device, more than 1 .2 - esp. More than 1, 4 - amounts.
- a basic idea of the invention consists in calculating the measured values for the
- the invention is based i.a. on the surprising realization that predicted
- Vibration sensors temperature response
- Vibration sensors can lead, along with a corresponding asymmetry between the vibration signals.
- Differences in temperature can not only occur on an inner side facing the lumen of an undesired coating infested wall, but surprisingly be observed on intact transducer devices for such measuring conditions in which an enthalpy of the fluid to be measured to a considerable extent by an enthalpy of the completely intact wall of the Pipe deviates and where the kinetic energy of the fluid flow
- An advantage of the invention is also to be seen in the fact that in an inventive arrangement of the temperature sensors using the same Temperaturmeßsignale, as in the determination of the mass flow also a diagnosis of the converter device during operation of the respective measuring system is feasible, for example with regard to a
- Fig. 1 a esp. Suitable for use in industrial measurement and automation technology, measuring system with a converter housing having
- FIG. 2 schematically shows an exemplary embodiment of a measuring system according to FIG. 1;
- FIG. 3a, 3b in perspective side views of a suitable for a measuring system according to Figures 1 and 2 converter device.
- FIG. 4 shows a sectional side view of a converter device suitable for a measuring system according to FIGS. 1 and 2;
- FIG. 4 shows a sectional side view of a converter device suitable for a measuring system according to FIGS. 1 and 2;
- Fig. 1 is a vibronic measuring system for measuring a schematically
- Measuring fluid temperature LI - flowing fluid FL1 (measuring fluid), such as a gas, a liquid or a flowable dispersion, or for recurrently determining the same mass flow rate m currently representing mass flow measurements x m shown schematically.
- the measuring system can also be set up to determine at least one further measured variable, for example a substance parameter, of the fluid FL.
- the same additional measured variable may be, for example, a density p, a viscosity ⁇ or else a measuring fluid temperature OFLI of the fluid flowing, for example through a pipeline.
- the measuring system comprises a converter device MW for generating measurement signals serving at least for the measurement of the mass flow rate and one with the same
- Converter device MW electrically connected, in particular in the operation of externally via connection cable and / or supplied by means of internal energy storage with electrical energy, measurement and operation electronics ME for generating the measured by the transducer device detected measured variable (s) representing measured values or for sequential output such measured values x m as a respective currently valid measured value x x (x m - »x x ) of the measuring system at a corresponding
- Measuring output for example in the form of digital measurements and / or in real time.
- the converter device of the measuring system serves - as shown schematically in FIG. 2 or a combination of FIGS. 1 and 2 - in particular during operation to carry a partial volume of the respective fluid FL1 to be measured or through which the fluid flows to provide different measuring signals for physical measured variables to be respectively detected by means of the converter device and for measuring point temperatures prevailing at different measuring points within the converter device.
- the converter device is for this purpose with a lumen 1 1 'having a lumen enveloped by a wall, for example at least partially curved and / or at least sectionally straight, first tube 1 1 and a lumen 1 1' enveloped by a wall, for example at least partially curved and / or at least partially straight second tube 12 equipped.
- the same tube 12 can - as in Figs. 2, 3a or 3b indicated or as from the
- the wall of the tube 1 1 and the tube 12 may, as usual in transducer devices of the type in question be metallic, for example, namely, at least partially made of titanium, zirconium or tantalum or, for example, consist of a stainless steel.
- Each of the at least like tubes 1 1, 12 extends, such as i.a. Also indicated in Fig. 2, in each case from an inlet-side first end 1 1 a and 12a to an outlet-side second end 1 1 b or 12b and is respectively adapted to a fluid, starting from the respective inlet-side first end 1 1 a or 12a in the direction of the outlet side second
- each of the - for example identical - tubes 1 1, 12 of the converter device according to the invention at least partially straight, thus partially (hollow) cylindrical, for example, namely circular cylindrical, and / or at least partially curved, For example, namely curved in a circular arc, be formed.
- Both the tube 1 1 and the tube 12 may also each mirror-symmetrically with respect to at least one of the respective tube imaginary intersecting, namely, for example, coincident with a main axis of inertia of the same tube, respective imaginary axis of symmetry, for example, namely V-shaped or U-shaped.
- the wall of the tube 1 1 and / or the wall of the Rohs 12 at least partially - for example, predominantly or wholly - consists of a material of which a specific thermal conductivity ⁇ 10 greater than 10 W / (m ⁇ K) and a specific
- Heat capacity cp10 are less than 1000 J / (kg ⁇ K).
- each of the tubes 1 1, 12 is provided or arranged for each of a partial volume of the fluid FL1 in a flow direction - for example, starting from the end 1 1a in the direction of the end 1 1 b or starting from the end 12a towards the end 12b - to be flowed through and vibrated during this; this in particular so that each of the
- Tubes 1 1, 12 each Nutzschwingungen, namely mechanical vibrations to execute an associated static rest position, which are suitable to induce in the fluid flowing at least from the mass flow rate m dependent Coriolis forces.
- the useful vibrations performed by the pipe 1 1 or pipe 12 may also be suitable for effecting friction forces dependent on its viscosity ⁇ in the fluid and / or inertial forces dependent on its density p.
- the transducer device may be formed as a vibration-type transducer useful as a constituent of a vibronic measurement system such as a Coriolis mass flowmeter, a density meter, and / or a viscosity meter.
- the same wall can consist, for example, of a metal or a metal alloy, for example titanium, zirconium or tantalum or a corresponding alloy thereof, a steel or a nickel-based alloy.
- the wall of each of the tubes 1 1, 12 according to a further embodiment of the invention each have a wall thickness s, which is more than 0.5 mm, and / or an inner diameter which is more than 0.5 mm .
- each of the tubes may be further sized to have an inside diameter to wall thickness ratio defined as a ratio of an inside diameter of the respective tube to a wall thickness s of the wall of the same tube that is less than 25: 1 is.
- the wall thickness in each of the tubes is less than 10 mm and / or the inner diameter is less than 200 mm or that each of the tubes 1 1, 12 each dimensioned so that the inner diameter to wall thickness ratio is more than 5: 1.
- the tubes 1 1, 12 may - as in converter devices of the type in question quite common - be housed in a converter housing 100 of the converter device, such that - as shown in Fig. 4 or from a synopsis of FIGS.
- each of the tubes 1 1, 12 each within one and the same of a, for example, metallic and / or serving as an outer protective wall
- the housing of the converter housing enveloped cavity of the converter housing is arranged and that between an inner surface 100+ of the wall of the converter housing 100 which faces a cavity facing the same, a jacket surface 11 of the wall of the tube 11, namely an outer surface of the wall of the tube 11 facing the cavity and a lateral surface 12 # of the wall of the tube 12, namely an outer space of the wall of the tube 12 facing the cavity, a gap 100 'is formed.
- the tubes 1 1, 12 and the same converter housing are hereby also set up in the
- Gap 100 ' for example, a specific thermal conductivity of less
- fluid FL2 for example air or an inert gas, containing 1 W / (m (K), forming a volume of fluid surrounding both the tube 11 and the tube 12, such that the lateral surface 11 facing the intermediate space is 1 # of the wall of the tube 1 1 to form a first interface 111 1 of the first kind, namely an interface between a fluid and a solid phase, and the space facing shell surface 12 # of the wall of the tube 12 to form a second interface 1112 of the first kind in the space 100 'held fluid FL2 are contacted.
- air or an inert gas containing 1 W / (m (K)
- the at least two tubes 1 1, 12 may, for example, to form serial
- the converter device further comprises an inlet-side first flow divider 20i and an outlet-side second flow divider 2O2, wherein both the second tube 1 1 and the tube 12 to form fluidically parallel flow paths to the, for example, identical flow divider 20i , 2O2 are connected, such that the tube 1 1 with the end 11 a in a first
- Flow opening 2O2A of the flow divider 2O2 opens, and that the tube 12 with the
- both the flow divider 20i and the flow divider 2O2 may each be an integral component of the same converter housing, such that - as in FIG schematically
- the converter device MW can furthermore be set up in the course of a fluid leading, for example designed as a rigid pipeline,
- a first connection flange serving to connect the same to a fluid segment of the process line, and a second connection flange serving to connect to a line segment of the process line serving to discharge the fluid can be provided on the outlet side of the converter device.
- the connecting flanges 13, 14 can, as in converter device of the type in question quite common or as indicated in Fig. 2, possibly also end in theticianunta
- Converter housing 100 integrated, namely be formed as an integral part of the converter housing.
- each of the connecting flanges 13, 14 each have a sealing surface for fluid-tight or leak-free connection of the converter device with a respective corresponding line segment of a process line and that also a smallest distance between the same sealing surfaces
- Insertion length LMW of the converter device defined; this in particular in such a way that the same installation length LMW is more than 250 mm and / or less than 3000 mm and / or in such a way that a tube length-to-installation length ratio LH / LMW of the converter device, defined by a ratio of a unwound tube length Ln of the first tube 1 1 fordium thesis;
- Insertion length LMW more than 1 .2, for example, more than 1, 4 amounts.
- the aforementioned unwound tube length Ln of the tube 11 and / or a developed tube length L12 of the tube 12 may also be more than 300 mm, for example.
- DSP Signal processor
- Housed electronics housing 200 of the measuring system may, depending on the requirements of the measuring system, for example, also impact and / or explosion-proof and / or hermetically sealed.
- the meter electronics ME as shown schematically in Fig. 2 in the manner of a block diagram, a measuring signals of the converter device MW processing, for example by means of a microprocessor formed, measuring and evaluation circuit ⁇ having the corresponding measured values for the generated by the measuring system to be detected measured variable.
- the measuring and evaluation circuit ⁇ of the measuring and operating electronics ME can, for example, by means of at least one
- Microprocessor and / or a digital signal processor (DSP) having microcomputer be realized.
- Operational electronics implemented regulators or controller algorithms can, as also shown schematically in FIG. 2, e.g. stored persistently in a non-volatile data memory EEPROM of the measuring and operating electronics ME and when starting the same into a, e.g. In the microcomputer integrated, volatile data storage RAM can be loaded.
- the measuring and operating electronics ME can also be designed so that they with regard to the circuit structure of one of the above-mentioned prior art, such as the US-B 63 1 1 136, known measuring and operating electronics or
- a transmitter on the part of the applicant eg under the designation "PROMASS 83F", Coriolis mass flow / density meter.
- the generated by means of the measuring and operating electronics measured values ME x x (x m, x P, ⁇ ⁇ , xs ”) can in the shown here measuring system, for example, on location, namely at the measurement point formed by means of the measuring system, displayed immediately , To visualize by means of the
- Measuring system generated and / or optionally meter internally generated
- the, for example, also (re-) programmable or remote parameterizable, measuring and operating electronics ME also be designed so that they in the operation of the measuring system with this parent electronic data processing system, such as a programmable logic controller (PLC) , a personal computer (PC) and / or a workstation, via a data transmission system, for example a fieldbus system, such as
- PLC programmable logic controller
- PC personal computer
- a fieldbus system such as
- FOUNDATION FIELDBUS, PROFIBUS, and / or wirelessly by radio measuring and / or other operating data, such as current measured values, system diagnostic values,
- the measuring and operating electronics ME can be designed so that they can be powered by an external power supply, for example via the aforementioned fieldbus system.
- the measuring and operating electronics ME can, for example, have such an internal power supply circuit NRG for providing internal supply voltages UN, which during operation is supplied by an external energy supply provided in the abovementioned data processing system via the aforementioned fieldbus system.
- the measuring system may be formed, for example, as a so-called four-wire device, in which the internal power supply circuit of the meter electronics ME by means of a first pair of lines with an external power supply and the internal communication circuit of the measuring and operating electronics ME by means of a second pair of lines with an external
- Data processing circuit or an external data transmission system can be connected.
- the measuring and operating electronics can also be designed so that they, as shown, inter alia, in the aforementioned US-A 2006/0161359, by means of a, for example, configured as a 4-20 mA current loop, two-wire connection the external electronic data processing system is electrically connected and is supplied with electrical energy and can transmit measured values to the data processing system, possibly also using HART Multidrop.
- the measuring system for coupling to a fieldbus or other electronic communication system
- the, for example, on-site and / or via communication system (re-) programmable, measuring and operating electronics ME to the have a corresponding - for example, one of the relevant industry standards, such as the IEC 61 158/1 EC 61784 compliant - communication interface COM for data communication, eg for transmitting measured and / or operating data, thus the measured values representing the respective measured variable, to the previously mentioned programmable logic controller (PLC) or a higher level process control system and / or for receiving setting data for the measuring system.
- PLC programmable logic controller
- the electrical connection of the converter device to the measuring and operating electronics can by means of appropriate
- Connecting lines take place from the electronics housing 200, for example via
- connection lines are guided in the converter housing 100 and laid at least partially within the converter housing 100.
- the connection lines can be formed, at least partially, as conductor wires enveloped at least in sections by an electrical insulation, e.g. inform of "twisted pair" cables, ribbon cables and / or
- connection lines can be formed, at least in sections, also by means of conductor tracks of, for example, a flexible or partially rigid and partially flexible, optionally also painted, printed circuit board. also the aforementioned WO-A 96/07081.
- Vibration axis or from the above Nutzschwingungen - has the
- Converter device further comprises a means of at least one - for example, electrodynamic, namely formed by immersion armature coil or as a voice coil
- the converter device For detecting mechanical vibrations of at least the tube 1 1, esp. Namely, the at least two tubes 1 1, 12, the converter device further comprises a means of at least a, for example, electrodynamic and / or the vibration generator type-like, first vibration sensor 51 and by means of a, for example, electrodynamic and / or identical to the vibration sensor 51, the second vibration sensor 52 formed
- the vibration sensor 51 is adapted to detect vibration movements of at least the tube 1 1 - for example, also each of the at least two tubes 1 1, 12 - at an inlet side first vibration measuring point formed by means of the same vibration sensor 51 and a first oscillatory movements representing first
- Oscillation signal s2 a u.a. also from a mass flow rate of the flowing through the pipe 1 1 fluid (co-) dependent phase difference exists.
- the vibration sensor 51 thus the thus formed first Schwingungsmeßstelle less far from the end 1 1 a of the tube 1 1 positioned away from the end of 1 1 b and the
- Vibration sensor 52 thus the thus formed second Schwingungsmeßstelle less far from the end of 1 1 b of the tube 1 1 positioned away from the end of 1 1 a, esp.
- Vibration sensor 51 is positioned equidistant from the end 1 1 a as is the
- Vibration sensor 52 from the end of 1 1 b.
- the vibration sensor arrangement thus formed by means of the two vibration sensors 51, 52 may - as with converter device of the type in question quite well - also for example also mirror symmetry with respect to at least one leller imaginary imaginary imaginary axis of symmetry be, for example, with respect to both a main axis of inertia of the tube 1 1 as well as to a main axis of inertia of the tube 12 parallel axis of symmetry.
- the vibration sensor 51 is thermally conductively coupled in the same way to the wall of the pipe 11 and / or to the wall of the pipe 12 as the latter
- Vibration sensor 12 in particular such that a one of the wall of the tube 1 1 for
- Vibration sensor 51 and further to a surrounding the vibration sensor 51 atmosphere flowing heat flow counteracting heat resistance is the same as a one of the wall of the tube 1 1 to the vibration sensor 52 and on to the one
- Vibration sensor 52 ambient atmosphere flowing heat flow counteracting thermal resistance and / or that one of the wall of the tube 12 to the
- Vibration sensor 51 and further to a surrounding the vibration sensor 51 atmosphere flowing heat flow counteracting heat resistance is the same as a one of the wall of the tube 12 to the vibration sensor 52 and on to the one Vibration sensor 52 surrounding atmosphere flowing heat flow counteracting thermal resistance.
- Vibration sensor 51 and a temperature of the vibration sensor 52 established, for example at least temporarily with a rate of change of more than 0.05 K / s temporally changing temperature difference ⁇ &, comprising the inventive converter device - as shown in Fig. 2, 3a, 3b and 4, respectively - Further, a mechanically, nonetheless thermally conductively coupled to the wall of the first tube 1 1 first temperature sensor 71 and a mechanically, nevertheless thermally conductive also coupled to the wall of the second tube 12 second temperature sensor 72. The same temperature difference .DELTA.
- Temperature difference ⁇ & is regularly formed larger intact tubes 1 1, 12, esp. With not attacked by a covering wall, and otherwise the same boundary conditions.
- the temperature sensors 71, 72 are also electrically connected to the measuring and operating electronics ME, for example, by two of the aforementioned electrical leads.
- the temperature sensor 71 is, as also apparent from Figs. 2 and 3a respectively, less far from the first end 1 1 a of the tube 1 1 positioned away as from the second end 1 1 b the same tube 1 1, while the temperature sensor 72, such also seen from Figure 2 or 3b, less far from the second end 12b of the tube 12 positioned away as from the first end 12a same pipe 12; this in particular in such a way that the temperature sensor 71 is positioned equidistant from the end 1 1 a of the tube 1 1 as the temperature sensor 72 from the end 12b or that the temperature sensor 71 is positioned equidistant from the end of 1 1 b of the tube 1 1 away like the temperature sensor 72 from the end 12a.
- the temperature sensor 71 is positioned equidistant from the end 1 1 a of the tube 1 1 as the temperature sensor 72 from the end 12b
- Temperature sensor 71 may, for example, be equidistant from a center of tube 1 1 as a temperature sensor 72 from a center of tube 12. Alternatively, or in addition, temperature sensor 71 may be positioned equidistant from a center of the tube as temperature sensor 72 of FIG Furthermore, the two temperature sensors 71, 72 may also be positioned so that the
- Temperature sensor 71 and the temperature sensor 72 as also indicated in Fig. 4 or from a synopsis of Figs. 2 and 4 readily apparent, based on a, for example, with a main flow direction of the converter device matching, imaginary longitudinal axis L. the converter device azimuthal - for example, the same in projection to a same
- the two temperature sensors 71, 72 may also be positioned so that a temperature sensor assembly of the transducer device formed by the same temperature sensors 71, 72 is axially symmetrical with respect to at least one imaginary axis of symmetry intersecting the transducer device, eg, one to both a major inertial axis of the imaginary axis Pipe 1 1 as well as to a
- Pipe 12 inertia main axis parallel imaginary axis of symmetry.
- the temperature sensor 71 - as also indicated in Fig. 2 - for example, also equidistant from
- Vibration sensor 51 may be positioned remotely as the second temperature sensor 72 of FIG.
- Vibration sensor 52 According to another embodiment of the invention, the
- Converter device except the temperature sensor 71 no further contact the wall of the tube 1 1 contacting temperature sensor and / or has the converter device except the
- Temperature sensor 72 no further contacting the wall of the tube 72
- the temperature sensor 71 is particularly provided for, a first
- Measuring point temperature 01 namely a temperature at one by means of the same
- Temperature sensor 71 formed first temperature measuring, to detect and in a first Temperaturmeßsignal ⁇ 1, namely a first measuring point temperature 01 representing the first electrical measurement signal to convert.
- the temperature sensor 72 is provided or adapted to detect a second measuring point temperature 02, namely a temperature at a second temperature measuring point formed by the same temperature sensor 72, and a second temperature measuring signal ⁇ 2, namely a second measuring point temperature 02
- the temperature sensor 71 is thermally conductively coupled in the same way with the wall of the first tube 1 1 as the temperature sensor 72 of the wall of the second tube 12; This, for example, such that a one of the wall of the tube 1 1 to the temperature sensor 71 and further to a same temperature sensor 71 surrounding atmosphere flowing heat flow counteracting heat resistance is the same as a one of the wall of the tube 12 to the temperature sensor 72 and on to a surrounding the temperature sensor 72 atmosphere flowing heat flow
- the temperature sensor 71 is mechanically coupled in the same way with the wall of the tube 1 1 as the
- the temperature sensor 71 is after a further embodiment of the invention - as also schematically illustrated in FIG. 4 - by means of a first inside the space 100 'arranged first temperature sensor 71 1 and by means of a n personallyen temperature sensor 71 1 thermally conductive with the wall of the tube 1 1 coupling first coupling body 712 formed.
- the temperature sensor 72 arranged by means of a likewise within the gap 100 '- for example, for
- Platinum measuring resistor, a thermistor or a thermocouple may be formed. Furthermore, each of the temperature sensors 71 1, 721 with the respective associated coupling body 712 or 722 by means of a suitable cohesive connection, for example, namely an adhesive bond or a soldering or welding connection, and / or by embedding in the respective cohesive connection, for example, namely an adhesive bond or a soldering or welding connection, and / or by embedding in the respective
- Coupling body 712 or 722 be connected.
- thermally well conductive connection between the wall of the tube 1 1 and the temperature sensor 71 of this is materially connected to the lateral surface 1 1 # the wall of the tube 1 1, namely, namely adhesive or by soldering or welding connection.
- Temperature sensor 71 may e.g. a dressing, thus a plastic based on epoxy resin or silicone-based, for example, a silicone elastomers or a 1- or
- the plastic used to connect the temperature sensor 71 and tube 1 1 may also be mixed with metal oxide particles in order to achieve the best possible heat conduction.
- the above-mentioned coupling body 712 itself - partially or wholly - made of plastic, for example, in such a way that placed between the temperature sensor 71 1 and wall or both the lateral surface 1 1 # the wall and the temperature sensor 71 1 contacting, possibly also monolithic plastic molding serves as a coupling body 712 or the entire
- Coupling body 712 from - for example, one or more layers on the wall of the tube 1 1 applied, thus between the wall of the tube 1 1 and the first temperature sensor 71 1 placed plastic.
- the temperature sensor 72 may equally be materially connected to the lateral surface 12 # of the wall of the tube 12, for example, adhesively or by means of a soldering or welding connection.
- the Coupling body 722 according to another embodiment of the invention, at least partially, for example, predominantly, from a metal, therefore, the coupling body 722 may be made of a material of which a specific thermal conductivity ⁇ 2 greater
- Coupling body 712 can be readily formed by appropriate selection of their respective production actually used materials such that the specific thermal conductivity ⁇ 722 a material of the second coupling body 722 equal to a specific thermal conductivity ⁇ 712 a material of the coupling body 712 and / or the specific heat capacity cp722 of the material of the coupling body 722 is equal to a specific heat capacity cp712 of the material of the first coupling body 712.
- the second coupling body 722 of the temperature sensor 72 is at least partially made of a plastic or formed by means of a suitably placed between the temperature sensor 721 and the wall of the tube 12 plastic body.
- a suitably placed between the temperature sensor 721 and the wall of the tube 12 plastic body is according to another embodiment of the invention.
- a metal or a metal alloy such as a steel, existing disc.
- Each of the two aforementioned discs can as one of the lateral surface of the wall of the tube 1 1 and the lateral surface of the wall of the tube 12 each correspondingly adapted passage opening having - for example, substantially annular or, as shown in Fig.
- each of the two aforementioned slices for example, each as both coupling body 712 or 722 of the temperature sensor 71 or 72 or as a part thereof, as well as a on or
- each of the two temperature sensors is thermally coupled to the respective tube 1 1 or 12 by the coupling body 712 of the
- Temperature sensor 71 the lateral surface 1 1 # of the wall of the tube 1 1 to form a first interface 1121 second type, namely an interface between two solid phases, and the coupling body 722 of the temperature sensor 72, the lateral surface 12 # of the wall of the tube 12 to form a second Contact interface II22 of the second kind.
- Boundary surfaces 1121, II22 in each case has a through the concrete design of the respective
- Coupling body 712 or 722 conditional, thus predetermined surface area.
- Thermal resistors R1, R2 are the same size.
- Pipe 1 1 assumed local temperature or a second pipe wall temperature O12, namely one of the wall of the pipe 12 assumed local temperature can follow, or that conversely each of the two measuring points temperatures not or at best only to a small extent a rate of change of the pipe wall temperature On, namely a speed at which the pipe wall temperature changes On time, or a rate of change of the
- Pipe wall temperature O12 namely a speed at which the pipe wall temperature O12 changes over time
- each of the coupling bodies 712 and 722 each form so that both the coupling body 712 and the coupling body 722 as a result, respectively a
- Heat capacity C1 or C2 which is less than 2000 J / K; this is advantageously also such that the heat capacity C1 of the first coupling body 712 and the heat capacity C2 of the
- second coupling body 722 satisfies a condition ⁇ - ⁇ 1, and / or that at least the
- Coupling body 712 has a specific heat capacity, which is less than 200 J / (kg ⁇ K), but if possible less than 100 J / (kg ⁇ K). Due to the typically desired for temperature sensors of the type in question compact design and the typically used, namely thermally highly conductive materials also exists a close
- Thermal resistances R1, R2 of the coupling body 712 or 722 in the manner described above are thus also achieved that each of the temperature sensors 71, 72 each only a comparatively low thermal inertia with respect to the respective tube wall temperature On or O12 or each of the two Meßstellentemperaturen 01, 02 - as desired - each rapid changes in the respective pipe wall temperature can follow, or vice versa, that each of the two Meßstellenentemperaturen 01, 02 not or at most only a small rate of change of the pipe wall temperature, namely a speed at which the respective Pipe wall temperature changes over time, depending.
- Gap 100 is also - as in converter devices of the type in question quite common and as indicated in Figure 4 each schematically by dotted hatching - with one, for example, a specific thermal conductivity F of less than 1 W / (m ⁇ K) having Fluid FL2 filled to form a the tubes 1 1, 12 enveloping fluid volume.
- Interspace 100 'held fluid FL2 or the fluid volume formed therewith has a hereinafter referred to as tube ambient temperature 0FL2, possibly also temporally variable
- Fluid temperature which at least temporarily deviates from the measuring fluid temperature OFLI by more than 1 K (Kelvin), esp. At least temporarily by more than 5 K.
- fluid FL2 for example, air or an inert gas, such as
- an outer surface of the temperature sensor 71 facing the gap 100 ' is also formed to form a fifth interface 1115 of the first type (interface between a fluid and a solid phase) and an outer surface of the same facing the gap 100'
- Temperature sensor 72 to form a sixth interface 1116 first type of im
- both the temperature sensor 71 and the temperature sensor 72 are thermally coupled to the volume of fluid formed in the space 100 ', such that - as also shown schematically in FIG. 4 - one from between the interface 1115 of the first type and the first temperature measuring ruling
- Each of the thermal resistances R3 and R4 is advantageously sized to be less than 20,000 K / W, especially less than 10,000 K / W.
- the temperature sensor 71 and the temperature sensor 72 is further formed according to a further embodiment of the invention such that the thermal resistance R3 and the thermal resistance R4 more than 500 K / W, in particular more than 5000 K / W.
- the temperature sensor 71 may further comprise a temperature sensor 71 1 thermally coupled with the fluid volume formed in the space third coupling body, the same volume of fluid contacted to form the third interface 1115 of the first type.
- Namely coupling body can at least partially, esp. Namely predominantly or entirely, consist of a material of which a specific thermal conductivity greater than the specific thermal conductivity F held in the space FL2 fluid and / or greater than 0, 1 W / (m ⁇ K) and of which a specific heat capacity is smaller than a specific heat capacity cpF of the fluid FL2 held in the space and / or smaller
- Coupling body matched to the fluid FL2 held in the intermediate space also be selected so that a ratio of the specific thermal conductivity of the same material to the thermal conductivity F of the fluid held in the space FL2 is greater than 0.2, and / or that a ratio of the specific heat capacity of the same material Heat capacity cpF of the fluid FL2 held in the gap is smaller than 1.5.
- the third coupling body can - for example, completely - by means of a temperature applied to the temperature sensor 71 1 of the temperature sensor 71, for example, with metal oxide particles offset, plastic, such. an epoxy resin or a silicone.
- the same third coupling body possibly also entirely, by means of a tissue tape applied to the temperature sensor 71 1, for example a glass fiber cloth tape, or by means of a metal sheet applied to the temperature sensor 71 1, such. a sheet metal strip made of stainless steel, be formed.
- the temperature sensor 72 by means of another, namely a
- Temperature sensor 721 thermally be formed with the fourth volume coupling body coupling in the space formed, which contacts the fluid volume formed in the space 100 'to form the sixth interface 1116 first type.
- the fourth coupling body may advantageously also be constructed identically to the one previously described, the temperature sensor 71 1 being thermally formed to couple the third coupling body of the temperature sensor 71 coupling to the fluid volume formed in the intermediate space 100 '.
- the tube wall temperature du of the tube 11 and the tube wall temperature 12 of the tube 12 are also determined by the measuring fluid temperature of the fluid FL1 currently in the lumen of the tube 11 or in the lumen of the tube 12.
- thermal resistances R1, R2, R3 and R4 are - as already mentioned - each relevant or entirely by material characteristics, such as. a specific thermal conductivity ⁇ , and dimensions of the respective coupling body or the wall of the respective
- Length Lth of the respective coupling body and a surface Ath Ath the same heat flow respective effective cross-sectional area of the respective coupling body for example, the surface area of the respective interfaces 1121, II22, and / or by corresponding material characteristics of the wall of the respective pipe 1 1 mm.12 as well as the in the
- each of the thermal resistances R1, R2, R3, R4 can be determined in advance sufficiently precisely by means of the same parameters ( ⁇ , Ath, Lth), for example by experimental measurements and / or by calculations. For example, based on the known relationship:
- thermo resistance R1 or R2 mitbehavder - namely a related to a heat flow due to heat conduction temperature drop
- the thermal resistance R1, R2, R3, R4 each mitbequed
- Heat transfer resistances are sufficiently well defined or sufficiently determined in advance. Alternatively or in addition, the thermal resistance R1, R2, R3, R4 or
- the coupling body 712 at least partially - for example, also predominantly or entirely - made of a material, for example, namely a thermal adhesive, of which a specific thermal conductivity ⁇ 712 greater than a specific
- the material of the coupling body 712 is further selected such that a ratio ⁇ 712 / F of the specific thermal conductivity ⁇ 712 of the same material of the coupling body 712 to the specific thermal conductivity F of the fluid FL2 held in the gap is greater than 2, and / or a ratio cp712 / cpF of a specific heat capacity cp712 of the same material of the coupling body 712 to the heat capacity cpF of the space-held fluid FL2 is smaller than 1.5, especially such that the specific heat capacity cp712 is smaller than a specific heat capacity cpF of the fluid held in the space.
- Temperature sensor 72 at least partially (or even entirely) made of the same material as the coupling body 712 of the temperature sensor 71 to an equally low thermal inertia of the temperature sensor 72 with respect to temporal changes of
- the first temperature sensor and the second temperature sensor are identical, namely that both the temperature sensor and coupling body used for it as well as the thermal coupling of the aforementioned components with each other or to the pipe and in the Interspace vorunone fluid are substantially equal.
- the measuring and operating electronics ME are connected both to each of the at least two vibration sensors 51, 52 and to each of the two temperature sensors 71, 72 as well as electrically connected to the at least one vibration exciter 41, for example, in each case by means of corresponding connecting wires.
- a multiplexer with at least two signal inputs and at least one Signal output and a, for example, a nominal resolution of more than 16 bits having and / or clocked at a more than 1000 s " sampling rate,
- Analog-to-digital converter ADC with at least one signal input and at least one
- multiplexer MUX is particularly adapted to optionally, for example, cyclically, turn on one of its signal inputs to the signal output, such that a signal applied to each through-connected signal signal is continued to the signal output, while the analog-to-digital converter ADC is adapted to a signal applied to n freelanceem signal input analog input signal with a - for example, namely, more than 1000 s "amount ends - sampling rate fA and with a digital
- Resolution N - for example, more than 16 bits - in a same input signal
- the at least one signal output of the multiplexer and the at least one signal input of the analog-to-digital converter are electrically coupled to one another and the temperature sensor 71 and the temperature sensor 72 are in each case electrically connected to the multiplexer MUX, the temperature measuring signal ⁇ 1 is applied to a first signal input of the multiplexer MUX and the temperature measuring signal ⁇ 2 to a second signal input of the multiplexer MUX.
- Analog-to-digital converter to generate ADC.
- the measuring and operating electronics ME is further set up for a
- Excitation device E for example, whose at least one vibration generator 41, driving - for example, to a predetermined voltage level and / or to a predetermined current and / or to a predetermined frequency regulated - excitation signal e1 to generate the one excitation frequency, namely a frequency corresponding signal frequency , or for effecting mechanical vibrations of the at least two tubes 1 1, 12 by means of n soliciten electrical excitation signal e1 electrical power in the at least
- excitation signal e1 is used in particular to the at least one vibration exciter controlled at least with that for the excitation or
- the excitation signal e can also simultaneously a plurality of sinusoidal signal components with each other
- the excitation device E is set up to be driven or driven by the excitation signal e1 to stimulate or maintain mechanical vibrations of the tubes 11, 12.
- the at least one vibration exciter converts an electrical exciter power fed in by means of the electrical excitation signal into, for example, pulsating or harmonic, namely substantially sinusoidal, exciter forces, which act on the tube 1 1 or 12 accordingly and thus actively excite the desired useful oscillations.
- the - finally generated by conversion of electrical excitation power fed into the vibration exciter - excitation forces can be in the person skilled in and known per se, namely provided by means provided in the measuring and operating electronics ME, the excitation signal based on
- Signal frequency and signal amplitude of the at least one sensor signal on and via an output channel providing driver circuit are generated accordingly.
- a digital phase-locked loop PLL
- a current magnitude of the exciter signal determining an amount of identical exciter forces, for example can be adjusted appropriately by means of a corresponding current regulator of the driver circuit.
- the meter electronics ME may here be e.g.
- Operation electronics ME also a corresponding, for example, designed as an independent electronics module, driver circuit Exc can be provided.
- driver circuit Exc The construction and use of the aforementioned phase-locked loops to actively excite vibrating elements of the type in question at a momentary resonance frequency is e.g. in US-A 48 01 897 described in detail.
- phase-locked loops to actively excite vibrating elements of the type in question at a momentary resonance frequency is e.g. in US-A 48 01 897 described in detail.
- the measuring and operating electronics ME is also set up for this, the two
- Transducer fluid FL1 representing measuring value (x x - »x m ), and a mass flow sequence X m , namely a sequence of such temporally successive, respectively the mass flow rate, m, of the fluid currently representing
- Operation electronics ME also a corresponding, possibly also with the aforementioned
- the measuring and operating electronics ME is in particular provided or set up to generate the aforementioned mass flow measured values x m , i so that at least for one
- Reference mass flow rate m re f namely a predetermined mass flow rate of a reference fluid flowing through the transducer, for example, a liquid or a gas
- Temperature difference ⁇ & between the two temperature measuring points are independent; this in particular in such a way that for at least one non-zero but nonetheless constant reference mass flow rate m re f determined in chronological succession
- the aforementioned reference mass flow rate m re f may, for example, during a
- (Wet) calibration of the measuring system with the reference fluid using a calibrated reference measuring system can be set, for example, before its delivery to a calibration system of the manufacturer and / or in addition, as u.a. Also shown in the aforementioned WO-A 02/097379, in installation position on site. For the above case, that the
- Reference fluid at a non-zero reference mass flow rate m re f is allowed to flow through the transducer device, the fluid flow may advantageously, not least for the purpose of establishing the aforementioned temperature difference, be formed laminar or the reference fluid in an advantageous manner Reynolds number (Re) of less than 1000 through the tube 1 1 and / or the tube 12 or the transducer device formed therewith be flowed through.
- Re Reynolds number
- m re f it can Accordingly, for example, be no more than 1 kg / h amount and / or held constant mass flow rate.
- the reference mass flow rate m re f but also be zero, so that the determined
- Mass flow measurements x m , i (x m , i - »Xm.ref -» Xm.zERo) represent a scale zero point of the measuring and operating electronics ME.
- the reference fluid can be advantageously, not least for the purpose of establishment of above-mentioned temperature difference, for example, a gas or a liquid having a specific heat capacity c, re f act that more than
- the reference fluid may thus, for example, an oil, esp. Having a viscosity of more than 10 "2 Pa s (Pascal second) to be. A particularly pronounced
- Reference mass flow rate m re f as a function of an amount
- of the nominal diameter of the converter device given in Sl basic unit for length (m meter) is less than
- reference fluid may for example be water or, for example, air, in which case significant temperature differences ⁇ & already for
- the measuring and operating electronics ME is adapted to the mass flow measured values x m , i based on the following, viz
- Reference mass flow rate m re fied mass flow rate measurement x m ref at least one polynomial function satisfies the corresponding condition.
- the measuring and operating electronics ME can be set up, mass flow measured values x m , i to be determined in such a way that in the case of a non-fluid flowed through converter device or non-fluid flowed through pipes 11, 12 chronologically sequentially determined, esp one each
- Mass flow rate m of zero (m re f 0) corresponding scale zero point x m , zERo the measuring and operating electronics ME representing mass flow measurements x m , i (x m , i -> Xm.zERo) a condition: N.
- the same temperature difference coefficients Kj can be determined experimentally beforehand for the respective measuring system, for example in the course of the aforementioned (wet) calibration of the measuring system by measuring the respective measuring system at different temperature differences and / or different (reference) mass flow rates and / or by computer-based simulations be, for example by adaptation of the polynomial function or their
- Temperature difference coefficients in the above polynomial function can be limited to N ⁇ 3 or a polynomial degree can be limited accordingly to two or one. In addition, it was also found that it is for the vast majority of converter devices or
- Transducer types can satisfy the first to transmit for a single transducer device experimentally determined temperature difference coefficient Kj the polynomial function on other identical transducer devices, so that the same identical
- Transducer devices associated with a considerable reduction in the calibration effort with respect to the polynomial function no longer need to be re-measured.
- Operating electronics ME further adapted, using both the Temperaturmeßsignals ⁇ 1 and the Temperaturmeßsignals ⁇ 2 a temperature difference sequence X A s, i, namely a sequence of temporally successive, each representing the temperature difference ⁇ & temperature difference.
- Generate measured values x A s, i and / or the measuring and operating electronics ME is set up, using both the oscillation signal s1 and the oscillation signal s2 in the person skilled in the art and known per se, a phase difference sequence ⁇ ⁇ , ⁇ , namely a sequence of temporally successive, each phase difference ⁇ representing (conventional) phase difference measured values ⁇ ⁇ , ⁇ to generate.
- a phase difference sequence ⁇ ⁇ , ⁇ namely a sequence of temporally successive, each phase difference ⁇ representing (conventional) phase difference measured values ⁇ ⁇ , ⁇ to generate.
- the calculation of the respective (current) temperature difference measured value XAS can e.g. be done in such a way that by means of the measuring and operating electronics ME at intervals both on the basis of the Temperaturmeßsignals ⁇ 1 a Meßstellenentemperatur 01 representing the first Meßstellentemperatur measured value as well as on the basis of the Temperaturmeßsignals ⁇ 2 a
- Measuring point temperature 02 representing the second measuring point temperature measured value are generated, and that n salvageer temperature difference measured value x A s a simple numerical
- measuring and operating electronics ME may also be arranged to use the temperature difference sequence X A s, i a functionality of
- Conversion device esp. Namely a functionality of the pipe 1 1 and / or the pipe 12 to monitor; For example, by means of the measuring and operating electronics ME measuring and operating electronics using the temperature difference sequence X A s, i be diagnosed, whether or that at least one of the tubes 1 1, 12 and thus formed the
- the measuring and operating electronics ME is according to a further embodiment of the invention further adapted to generate (using the temperature measurement signal ⁇ 1 as well as the temperature measuring signal ⁇ 2 (recurring)) a transducer temperature measured value X®, which represents a transducer temperature OMW, both of the
- Transducer temperature reading X® a weighted average of the
- Measuring point temperatures 01, 02 corresponds.
- the calculation of the temperature measured value X.sub.E can be carried out, for example, by firstly using the first measuring-point temperature measured value X.sub.i representing the measuring-point temperature 01, both on the basis of the temperature-measuring signal
- Measuring point temperature measured value X2 are generated, and that the same
- Transducer temperature measured value according to one of the measuring point temperature measured values X1, X2 as well as previously determined and stored in the measuring and operating electronics ME numerical fixed values ⁇ , ß dependent calculation rule:
- Measuring point temperatures 01, 02 corresponds. For the case mentioned, that both the two
- Tubes 1 1, 12 and the two temperature sensors 71, 72 are identical and that the structure of the temperature sensor arrangement of the converter device is axially symmetrical with respect to
- Tube wall temperature ⁇ 9 U of the tube 1 1 and a mean tube wall temperature ⁇ 9 12 of the tube 12 results.
- the measuring and operating electronics ME is according to a further embodiment of the invention further adapted to the at least one measured value X x - for example, namely the aforementioned density measured value X p and / or the aforementioned mass flow value X m - below
- Density measurement namely a measurement value representing a density p of the fluid and / or a viscosity measurement, namely to generate a measured value representing a viscosity ⁇ of the fluid.
- the measuring system is also intended to measure the measuring fluid temperature LI
- the measuring and operating electronics ME is further adapted to occasionally also based on the two temperature measuring signals ⁇ 1, ⁇ 2
- Measuring fluid temperature measured value XQ.FL ZU representing the same Meßfluidtemperatur represents.
- the measured fluid temperature measurement value X.sub.R, FL can be calculated in a very simple manner using a calculation rule supplemented by one of the above-described calculation instructions (1), (2) only by a coefficient KFL, for example fixed, coefficient KFL.
- X 0 FL ⁇ ⁇ ⁇ ⁇ 1 + ⁇ ⁇ ⁇ ⁇ 2 + ⁇ ⁇ (8) or
- Flow resistance has different flow resistance.
- the same change in the flow resistance can for example consist of a clamped in one of the tubes
- Embodiment of the invention further adapted, using both the
- the measuring and operating electronics ME is also adapted to use the same temperature deviation measured value ⁇ a functionality of
- Conversion device for example, namely, a functionality of the tube 1 1 and / or a functionality of the tube 12 to monitor or possibly diagnose that the
- Conversion device has a comparison with an original flow resistance changed flow resistance, that is, that at least one of the tubes of the converter device has a relation to an original flow resistance changed flow resistance and / or that the tube 1 1 has a flow resistance of a
- the measuring and operating electronics ME can also be set up using the
- Temperaturabweichungsmeßwerts ⁇ generate an alarm that signals only a limited functionality of the converter device, as a result of the aforementioned
- the measuring and operating electronics ME is further adapted, using the temperature measuring ⁇ 1, but not the
- Transducer temperature represents at least approximately.
- a measured value for converter temperature is determined and instead of the converter temperature measured value X ⁇ , MW are outputted as a substitute.
- the measuring and operating electronics ME can also be set up for this, using the temperature measuring signal ⁇ 1, but not the temperature measuring signal ⁇ 2 or using the temperature measuring signal ⁇ 2, but not the temperature measuring signal ⁇ 1 a (further) auxiliary temperature measured value X ⁇ , FL * To generate the
- Measuring fluid temperature at least approximately represented, as well as the same
- Auxiliary temperature measurement value X ⁇ , FL * may be substituted instead of the measured fluid temperature measured value X ⁇ , FL.
- the measuring and operating electronics ME can also be set up for the aforementioned defect of one of the temperature sensors 71, 72 or the aforementioned separation of one of the temperature sensors 71, 72 of the measuring and
- Operating electronics ME to detect and possibly to report, for example in the form of a
- the measuring system can also be set up to measure a density and / or a viscosity of the medium, for example based on a useful signal component of at least one of the vibration signals and / or based on the excitation signal.
- the measuring and operating electronics ME according to a further embodiment of the invention is further configured, using at least one of the oscillation signal s1, s2
- a frequency measurement value Xf representing a frequency of mechanical vibrations of the tubes 1 1, 12; this in particular in such a way that on the basis of the oscillation signal a useful frequency, namely a dependent of the measured variable to be measured oscillation frequency of Nutzschwingungen is determined and the Frequenzmeßwert Xf represents the same useful frequency.
- useful frequency can - as already mentioned and as in vibronic measurement systems of the type in question quite common - one of the fluid-carrying tubes each inherent resonant frequencies be selected, for example, a
- N termeer generated by the Frequenzmeßwerts Xf measured value can, for example, the density p of the fluid FL1 representing density measured value x p and / or the viscosity ⁇ of the fluid FL1 representing viscosity measured value ⁇ be ⁇ .
- the measuring and operating electronics ME is according to a further embodiment of the invention further adapted to the at least one density measured value X P and / or the least one
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Measuring Volume Flow (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102016015563 | 2016-12-29 | ||
DE102017106209.2A DE102017106209A1 (de) | 2016-12-29 | 2017-03-22 | Vibronisches Meßsystem zum Messen einer Massendurchflußrate |
PCT/EP2017/080093 WO2018121929A1 (de) | 2016-12-29 | 2017-11-22 | VIBRONISCHES MEßSYSTEM ZUM MESSEN EINER MASSENDURCHFLUßRATE |
Publications (1)
Publication Number | Publication Date |
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EP3563123A1 true EP3563123A1 (de) | 2019-11-06 |
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Application Number | Title | Priority Date | Filing Date |
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EP17822141.2A Pending EP3563123A1 (de) | 2016-12-29 | 2017-11-22 | VIBRONISCHES MEßSYSTEM ZUM MESSEN EINER MASSENDURCHFLUßRATE |
Country Status (4)
Country | Link |
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US (1) | US10928233B2 (de) |
EP (1) | EP3563123A1 (de) |
CN (1) | CN110114642B (de) |
WO (1) | WO2018121929A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102016112599A1 (de) * | 2016-07-08 | 2018-01-11 | Endress + Hauser Flowtec Ag | Meßsystem |
WO2018121930A1 (de) * | 2016-12-29 | 2018-07-05 | Endress+Hauser Flowtec Ag | VIBRONISCHES MEßSYSTEM ZUM MESSEN EINER MASSENDURCHFLUßRATE |
US12111648B2 (en) * | 2022-08-05 | 2024-10-08 | Trimble Inc. | Detecting blockages in agricultural equipment using vibration sensors |
Family Cites Families (52)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102013101369B4 (de) | 2013-02-12 | 2021-02-18 | Endress + Hauser Flowtec Ag | Coriolis-Massendurchfluß-Meßgerät |
DE8712331U1 (de) | 1986-09-26 | 1988-01-28 | Flowtec AG, Reinach, Basel | Corioliskraft-Massendurchflussmesser |
DE3632800A1 (de) | 1986-09-26 | 1988-04-07 | Flowtec Ag | Nach dem coriolisprinzip arbeitendes massendurchflussmessgeraet |
BR8707855A (pt) | 1986-10-09 | 1989-10-03 | Micro Mottion Inc | Aparelhagem e processos para a medicao da densidade de um fluido desconhecido com o uso de um medidor de coriolis |
GB8829825D0 (en) | 1988-12-21 | 1989-02-15 | Schlumberger Ind Ltd | A combined output and drive circuit for a mass flow transducer |
US5295084A (en) | 1991-10-08 | 1994-03-15 | Micromotion, Inc. | Vibrating tube densimeter |
DE4224379C2 (de) | 1992-07-06 | 1998-05-20 | Krohne Messtechnik Kg | Massendurchflußmeßgerät |
US5349872A (en) | 1993-08-20 | 1994-09-27 | Micro Motion, Inc. | Stationary coils for a coriolis effect mass flowmeter |
DK0685712T3 (da) | 1994-05-26 | 2000-10-02 | Flowtec Ag | Massegennemstrømningsdetektor ifølge Coriolis-princippet |
DE69515576T2 (de) | 1994-09-09 | 2000-09-14 | Fuji Electric Co., Ltd. | Schwingungsmessvorrichtung |
US5687100A (en) | 1996-07-16 | 1997-11-11 | Micro Motion, Inc. | Vibrating tube densimeter |
US5796012A (en) | 1996-09-19 | 1998-08-18 | Oval Corporation | Error correcting Coriolis flowmeter |
DE19719587A1 (de) | 1997-05-09 | 1998-11-19 | Bailey Fischer & Porter Gmbh | Verfahren und Einrichtung zur Erkennung und Kompensation von Nullpunkteinflüssen auf Coriolis-Massedurchflußmesser |
US8447534B2 (en) * | 1997-11-26 | 2013-05-21 | Invensys Systems, Inc. | Digital flowmeter |
US8467986B2 (en) * | 1997-11-26 | 2013-06-18 | Invensys Systems, Inc. | Drive techniques for a digital flowmeter |
US6311136B1 (en) | 1997-11-26 | 2001-10-30 | Invensys Systems, Inc. | Digital flowmeter |
US6092409A (en) | 1998-01-29 | 2000-07-25 | Micro Motion, Inc. | System for validating calibration of a coriolis flowmeter |
US6487507B1 (en) | 1999-10-15 | 2002-11-26 | Micro Motion, Inc. | Remote signal conditioner for a Coriolis flowmeter |
US6512987B1 (en) | 2000-03-22 | 2003-01-28 | Micro Motion, Inc. | Method and apparatus for operating coriolis flowmeters at cryogenic temperatures |
GB2376080B (en) | 2001-05-30 | 2004-08-04 | Micro Motion Inc | Flowmeter proving device |
DE10257322A1 (de) | 2002-12-06 | 2004-06-24 | Endress + Hauser Flowtec Ag, Reinach | Prozeß-Meßgerät |
JP4994665B2 (ja) | 2003-08-29 | 2012-08-08 | マイクロ・モーション・インコーポレーテッド | 流量測定装置の出力情報を訂正する方法及び装置 |
DE10351310B4 (de) * | 2003-10-31 | 2009-08-13 | Abb Ag | Vorrichtung und Verfahren zum Betrieb eines Coriolis-Massendurchflussmessers |
US7127952B2 (en) * | 2004-07-23 | 2006-10-31 | Endress + Hauser Flowtec Ag | Vibration-type measurement pickup for measuring media flowing in two medium-lines, and inline measuring device having such a pickup |
DE102004035971A1 (de) * | 2004-07-23 | 2006-02-16 | Endress + Hauser Flowtec Ag | Meßaufnehmer vom Vibrationstyp zum Messen von in zwei Mediumsleitungen strömenden Medien sowie In-Line-Meßgerät mit einem solchen Meßaufnehmer |
US7200503B2 (en) | 2004-12-29 | 2007-04-03 | Endrss + Hauser Flowtec Ag | Field device electronics fed by an external electrical energy supply |
US7475603B2 (en) | 2005-11-15 | 2009-01-13 | Endress + Hauser Flowtec Ag | Measurement transducer of vibration-type |
JP4761134B2 (ja) | 2006-02-17 | 2011-08-31 | 独立行政法人産業技術総合研究所 | 質量流量計 |
US8302491B2 (en) * | 2007-10-15 | 2012-11-06 | Micro Motion, Inc. | Vibratory flow meter and method for determining a fluid temperature of a flow material |
US7784359B2 (en) * | 2008-04-17 | 2010-08-31 | Rosemount Aerospace Inc. | Coriolis effect mass flow meter and gyroscope |
CN102016519B (zh) | 2008-05-01 | 2013-08-21 | 微动公司 | 用于根据流量计参数的偏差进行诊断的方法 |
JP4274385B1 (ja) * | 2008-07-28 | 2009-06-03 | 株式会社オーバル | 流量計における温度計測回路 |
WO2010103075A1 (de) | 2009-03-11 | 2010-09-16 | Endress+Hauser Flowtec Ag | MEßSYSTEM FÜR IN EINER ROHRLEITUNG STRÖMENDE MEDIEN |
EP2435801B1 (de) * | 2009-05-27 | 2013-05-15 | Micro Motion, Inc. | Verfahren und vorrichtung zur bestimmung eines messfehlers in einem durchflussmesser vom schwingungstyp |
DE102009046839A1 (de) * | 2009-11-18 | 2011-05-19 | Endress + Hauser Flowtec Ag | Meßsystem mit einer zwei parallel durchströmte Meßrohre aufweisenden Rohranordnung sowie Verfahren zu deren Überwachung |
RU2526296C2 (ru) | 2009-12-21 | 2014-08-20 | Эндресс+Хаузер Флоутек Аг | Измерительный датчик вибрационного типа, способ изготовления измерительного датчика и измерительная система, применение измерительного датчика |
CA2806150C (en) | 2010-08-02 | 2016-12-06 | Micro Motion, Inc. | Method and apparatus for determining a temperature of a vibrating sensor component of a vibrating meter |
DE102010039543A1 (de) * | 2010-08-19 | 2012-02-23 | Endress + Hauser Flowtec Ag | Meßsystem mit einem Meßwandler vom Vibrationstyp |
WO2012028425A1 (de) | 2010-09-02 | 2012-03-08 | Endress+Hauser Flowtec Ag | Messsystem mit einem messaufnehmer vom vibrationstyp |
EP2614339B1 (de) | 2010-09-09 | 2019-03-27 | Micro Motion, Inc. | Temperaturbelastungskompensation in einem vibrationsdurchflussmesser mit einem gekrümmten rohr |
DE102010040598A1 (de) * | 2010-09-10 | 2012-03-15 | Endress + Hauser Flowtec Ag | Verfahren zum Detektieren einer Verstopfung in einem Durchflussmessgerät |
DE102011080415A1 (de) * | 2011-08-04 | 2013-02-07 | Endress + Hauser Flowtec Ag | Verfahren zum Detektieren einer Belagsbildung oder einer Abrasion in einem Durchflussmessgerät |
DE102011089808A1 (de) | 2011-12-23 | 2013-06-27 | Endress + Hauser Flowtec Ag | Verfahren bzw. Meßsystem zum Ermitteln einer Dichte eines Fluids |
NO2948624T3 (de) | 2013-03-15 | 2018-03-31 | ||
DE102014103430A1 (de) | 2014-03-13 | 2015-09-17 | Endress + Hauser Flowtec Ag | Wandlervorrichtung sowie damit gebildetes Meßsystem |
DE102014103427A1 (de) | 2014-03-13 | 2015-09-17 | Endress + Hauser Flowtec Ag | Wandlervorrichtung sowie damit gebildetes Meßsystem |
BR112016022804B1 (pt) | 2014-04-07 | 2020-10-20 | Micro Motion, Inc | medidor de fluxo, métodos para determinar assimetria de fluxo através de tubos de fluxo em um medidor de fluxo, e, para determinar fluxo através de dois tubos de fluxo no medidor de fluxo |
EP3137961A4 (de) | 2014-04-28 | 2018-01-24 | A.P. Møller - Mærsk A/S | System und verfahren zur messung der menge des in einem bunkerungsbetrieb zugeführten kraftstoffes |
WO2016048324A1 (en) * | 2014-09-25 | 2016-03-31 | Micro Motion, Inc. | Flowmeter housing and related methods |
DE102014114858A1 (de) | 2014-10-14 | 2016-04-14 | NSB Niederelbe Schiffahrtsgesellschaft mbH & Co. KG | Bunkermesssystem |
DE102015103208A1 (de) | 2014-10-17 | 2016-04-21 | Endress + Hauser Flowtec Ag | Meßsystem zum Messen wenigstens einer Meßgröße eines Fluids sowie Verfahren zum Betreiben eines solchen Meßsystems |
US9689736B2 (en) * | 2014-10-31 | 2017-06-27 | Invensys Systems, Inc. | Method to provide a quality measure for meter verification results |
-
2017
- 2017-11-22 US US16/474,732 patent/US10928233B2/en active Active
- 2017-11-22 WO PCT/EP2017/080093 patent/WO2018121929A1/de unknown
- 2017-11-22 CN CN201780080963.9A patent/CN110114642B/zh active Active
- 2017-11-22 EP EP17822141.2A patent/EP3563123A1/de active Pending
Also Published As
Publication number | Publication date |
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US20190323873A1 (en) | 2019-10-24 |
CN110114642A (zh) | 2019-08-09 |
WO2018121929A1 (de) | 2018-07-05 |
US10928233B2 (en) | 2021-02-23 |
CN110114642B (zh) | 2021-06-08 |
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