CN1890537A - Coriolis mass flowmeter - Google Patents
Coriolis mass flowmeter Download PDFInfo
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- CN1890537A CN1890537A CNA2004800368605A CN200480036860A CN1890537A CN 1890537 A CN1890537 A CN 1890537A CN A2004800368605 A CNA2004800368605 A CN A2004800368605A CN 200480036860 A CN200480036860 A CN 200480036860A CN 1890537 A CN1890537 A CN 1890537A
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- 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
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- 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
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- 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
- G01F1/8413—Coriolis or gyroscopic mass flowmeters constructional details means for influencing the flowmeter's motional or vibrational behaviour, e.g., conduit support or fixing means, or conduit attachments
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- 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
- G01F1/8413—Coriolis or gyroscopic mass flowmeters constructional details means for influencing the flowmeter's motional or vibrational behaviour, e.g., conduit support or fixing means, or conduit attachments
- G01F1/8418—Coriolis or gyroscopic mass flowmeters constructional details means for influencing the flowmeter's motional or vibrational behaviour, e.g., conduit support or fixing means, or conduit attachments motion or vibration balancing means
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- 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
- G01F1/8422—Coriolis or gyroscopic mass flowmeters constructional details exciters
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- 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
- G01F1/8431—Coriolis or gyroscopic mass flowmeters constructional details electronic circuits
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- 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
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- 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
- G01F1/849—Coriolis or gyroscopic mass flowmeters arrangements of measuring means, e.g., of measuring conduits vibrating measuring conduits having straight measuring conduits
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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
Disclosed is a Coriolis mass flowmeter/density meter comprising at least one measuring tube (11) through which a two-phase or multiphase medium flows during operation thereof. A supporting means (12) of the Coriolis mass flowmeter/density meter is fixed to an inlet end and an outlet end of the measuring tube (11), thus clamping the same so as to allow the measuring tube (11) to vibrate. The measuring tube (11) is made to vibrate mechanically, particularly to perform bending vibrations, by means of an excitation system (13). The inventive Coriolis mass flowmeter/density meter further comprises means (141, 142) for generating test signals (xs1, xs2 ) representing vibrations at the inlet end and outlet end of the measuring tube (11). An electronic evaluation unit (2) generates an intermediate value (X'm) that is derived from the test signals (xs1, xs2) and represents an uncorrected mass flow rate as well as a corrected value (XK) for the intermediate value (X m), said corrected value being derived from the test signals (xs1, xs2), especially from a measured value (X<) which is also generated in the electronic evaluation unit (2) and represents a density of the medium. The electronic evaluation unit (2) additionally generates a measured value (Xm) representing a mass flow rate with the aid of the intermediate value (X'm) and the corrected value (XK).
Description
The present invention relates to a kind of coriolis mass flowmeters/densitometer, it is used for particularly two-phase or multiphase medium that pipeline flows, and the invention still further relates to a kind of method that is used to produce the measured value of representation quality flow.
In process measurement and automatic technology, physical parameter for fluid mobile in the measuring channel, mass rate for example, density and/or viscosity, often use this measurement instrument, it utilize to insert in the pipeline of guiding fluid and the vibration-type measuring transducer of being flowed through by fluid in operation and coupled measurement and function circuit influence reacting force in the fluid, for example corresponding to the Coriolis force of mass rate, corresponding to the inertial force of density or corresponding to friction force of viscosity etc., measurement instrument obtains representing the current mass rate of fluid from these power, one or more measuring-signals of current viscosity and/or current density.Such vibration-type measuring transducer for example has illustrated in following document: WO-A03/076880, WO-A02/37063, WO-A01/33174, WO-A00/57141, WO-A99/39164, WO-A98/07009, WO-A95/16897, WO-A88/03261, US2003/0208325, US-B6513393, US-B6505519, US-A6006609, US-A5869770, US-A5796011, US-A5602346, US-A5301557, US-A5218873, US-A5069074, US-A4876898, US-A4733569, US-A4660421, US-A4524610, US-A4491025, US-A4187721, EP-A553939, EP-A1001254 or EP-A1281938.
In order to guide fluid, measuring transducer comprises at least one measuring tube, and it for example is contained in tubulose or the box-like supporting frame.Measuring tube has bending or straight pipeline section, makes this pipeline section vibration by the motor exciting bank during operation, to produce above-mentioned reacting force.In order to detect the particularly pipeline section vibration of inlet end and endpiece, measuring transducer also has the electric physical sensors setting that the motion of pipeline section is reacted to some extent.In the situation of the coriolis mass flowmeters that is used for the medium that pipeline flows, the measurement of mass rate is achieved in that and allows MEDIA FLOW through inserting ducted measuring tube and vibration survey pipe in operation, thereby medium is subjected to Coriolis force.This makes the inlet end of measuring tube and endpiece zone vibrate on phase shift ground each other.Phase shift size measuring as mass rate.Therefore, the vibration of measuring tube is utilized the length along measuring tube of sensor as aforementioned setting two osciducers separated from one another and detects and be converted into the oscillation measurement signal, by they each other phase shift and draw mass rate.
Above-mentioned US-A 41 87 721 has mentioned, and the instantaneous density of flow media also can be utilized coriolis mass flow meter measurement usually, and in fact based on the frequency of at least one oscillation measurement signal that transmission is set by sensor.In addition, the temperature of fluid to be measured is also directly measured with suitable manner usually, for example utilizes the temperature sensor that is arranged on the measuring tube.So can suppose, in any situation, utilize density and temperature that modern Coriolis mass flowmeter can also measuring media, consider particularly that these are measured and can be used to usually compensate because the measuring error that the fluid density that fluctuates causes; About this point, especially referring to WO-A02/37063, WO-A99/39164, US-A 56 02 346 or WO-A00/36379.
Yet, have been found that in the use of the measuring transducer of described type, in the situation of nonhomogeneous media, particularly in the situation of two-phase or multiphase stream, the oscillation measurement signal that obtains from the vibration of measuring tube particularly also has described phase shift all to be subjected to considerable fluctuation, although separately the viscosity of fluid phase and density and mass rate are actually constant and/or obtained suitable consideration, thereby if there is not remedial measures then these signals will can not be used to measure the physical parameter of expectation fully.This nonhomogeneous media can be a liquid for example, and the gas that exists in the pipeline in the situation of feed or filling process particularly air is introduced into wherein inevitably, perhaps Rong Xie fluid for example carbon dioxide from this liquid, discharge and bubble.Moist or saturated steam is another example of this nonhomogeneous media.
In US-A 45 24 610, for the operation of vibration-type measuring transducer, provided a kind of possible reason of this problem, promptly, heterogeneity is entered measuring tube such as bubble by fluid carry-over, is deposited on its inwall and thereby can influences oscillating characteristic to a certain extent.For fear of this problem, also propose to install and measure transmitter like this, make straight measuring tube extend substantially vertically, with heteropical precipitation of the particularly gaseous state that prevents this interference.Yet this is a very special solution, and it can only realize in the condition of limited very much, particularly in the measuring technique in industrial process.On the one hand, in this situation, measuring transducer to be fit into wherein pipeline may must be fixed to transmitter rather than conversely, this will be that the user does not expect.On the other hand, as already mentioned, measuring tube may be crooked, thereby can not deal with problems by changing the orientation of installing.In addition, clearly, by the deterioration of the measuring-signal that uses vertically arranged straight measuring tube in fact not avoid significantly to be mentioned.In addition, it all is unsuccessful avoiding the further effort of the fluctuation of such measuring-signal that produces in the situation of streaming flow by this way.
Similarly for example discuss in JP-A10-281846, WO-A03/076880 or US-B 65 05 519 to some extent for the influence of measuring accuracy reason and they in determining the situation of mass rate.Yet, in order to reduce the measuring error in two-phase or multiphase stream, WO-A03/076880 has proposed to carry out fluid regulation before actual flow is measured, and JP-A10-281846 and US-B 65 05 519 are preferably according to oscillation measurement signal correction flow measurement, particularly mass flow measurement.This proofread and correct for example use for the pre-training of oscillation measurement signal in addition may be adaptive sorter.Sorter can for example be designed to Kohonen mapping or neural network, and or based on the several parameters of measuring in the operation particularly mass rate and density and the further feature that obtains thus, perhaps also utilize the time interval of the oscillation measurement signal that comprises one or more oscillation period, proofread and correct and carry out.
Use this sorter to compare with existing coriolis mass flowmeters/densitometer, for example have measuring transducer almost be need not the advantage that changes, here, change the function circuit that relates to physical construction, exciting bank or drive it, they all mate application-specific especially.
Yet a remarkable shortcoming of this sorter is, compares with existing coriolis mass flowmeters, needs sizable change in the zone that produces measured value, especially analog to digital converter of Shi Yonging and microprocessor.In fact, as disclosed in US-B 65 05 519, for example in the digitizing of the oscillation measurement signal of about 80Hz oscillation frequency, the sort signal analysis need about 55kHz or higher sampling rate, to reach enough precision.In other words, must use the sampling rate sampling oscillation measurement signal that is far longer than 600: 1.In addition, the firmware of storage and execution correspondingly becomes complicated in the digital measurement circuit.
Another shortcoming of this sorter is, for measuring transducer in esse measuring condition of operating period, must train and correspondingly confirm particularly for the installation site, treat characteristic or other factor that influences measuring accuracy that fluid measured and its change usually.Because the interactive high complexity of all of these factors taken together, training and affirmation thereof can only onlinely be carried out and carry out separately for each measuring transducer usually, and this causes that measuring transducer starts cost and raises.In addition, have been found that, but this sorting algorithm is on the one hand because the high complexity suitable physical mathematics model of relevant or comprehension parameter because common imprecise existence possesses skills on the other hand, so sorter has very low transparency and thereby often is difficult to be communicated with.Certainly, what be associated therewith is, in client's part considerable reservation can be arranged, and when the sorter that uses is adaptive, when for example being neural network, this acceptance problem occurs in client's part especially.
An object of the present invention is to provide a kind of corresponding coriolis mass flowmeters, it accurately measures mass rate, even at heterogeneous fluid particularly in the situation of polyphasic flow.Another purpose provides a kind of correlation method that is used to produce measurement result.
In order to reach these purposes, the present invention proposes a kind of coriolis mass flowmeters, particularly Coriolis-type mass flowmeter/densimeter, is used for the mass rate of mobile particularly two-phase or multiphase medium of measuring channel, and this coriolis mass flowmeters comprises:
-at least one inserts ducted measuring tube, and it is in operation by the MEDIA FLOW warp;
-supportive device, its be fixed to the inlet end of measuring tube and endpiece and thereby clamping measuring tube oscillatorily;
-exciting bank, it makes measuring tube carry out mechanical oscillation in operation, particularly crooked vibration;
-osciducer is used for producing:
-the first oscillation measurement signal, it represents the entrance side vibration of measuring tube, and
-the second oscillation measurement signal, it represents the outlet side vibration of measuring tube; With
-analytical electron device,
-it produces first intermediate value of the temporary transient representative mass rate to be measured that obtains from the oscillation measurement signal, and produce the corrected value that is used for first intermediate value that obtains from first intermediate value, and
-it utilizes first intermediate value and corrected value, determines the mass flow measurement of representative mass rate to be measured,
-wherein the analytical electron device uses second intermediate value that obtains from first intermediate value to produce corrected value, and second intermediate value represent functional value of power function, wherein power function with intermediate value as the end and the index that is in particular rational number less than zero.
In addition, the invention provides a kind of method, be used to utilize coriolis mass flowmeters, particularly Coriolis-type mass flowmeter/densimeter generates first measured value of the mass rate of representing the medium that flows in the pipeline, and this method may further comprise the steps:
-causing the vibration of the coriolis mass flow meter measurement pipe that medium is flowed through, particularly crooked vibration is to produce Coriolis force;
The vibration of-detection measuring tube, and generate first measuring-signal of representing the entrance side vibration and second measuring-signal of representing the outlet side vibration, be used to obtain the intermediate value and the corrected value that obtains for intermediate value of temporary transient representation quality flow,
-wherein,, obtain second intermediate value in order to generate corrected value from first intermediate value, it represent the functional value of power function, this power function have described intermediate value as the end and index less than zero, rational number particularly; And
-utilize corrected value to proofread and correct intermediate value.
According to first embodiment of coriolis mass flowmeters of the present invention,
-analytical electron device sends density measurement, and it is represented density of medium and obtains from the first and/or second oscillation measurement signal, and
-analytical electron device also utilizes density measurement to determine corrected value.
According to second embodiment of coriolis mass flowmeters of the present invention, the analytical electron device utilizes density measurement to determine the deviation of Media density and predetermined reference density.
The 3rd embodiment according to coriolis mass flowmeters of the present invention, the analytical electron device has the table storer, wherein storage and the irrelevant digitizing corrected value of second intermediate value, and the number storage reference address that forms based on second intermediate value of table storer utilization and send corrected value.
First embodiment of the method according to this invention, this method is further comprising the steps of:
-obtain representing second measured value of Media density according to measuring-signal; And
-use second measured value to obtain corrected value.
The invention has the advantages that, in coriolis mass flowmeters of the present invention and situation that existing coriolis mass flowmeters is compared, only on numerical analysis electronic installation commonly used, slightly change and change and only limit to firmware basically, and in the situation of measuring transducer and in generation and pre-service oscillation measurement signal, need hardly to change.So for example the oscillation measurement signal still can be as being lower than 100: 1 with commonly used in the past, particularly about 10: 1 sampling rate is sampled.
The embodiment that provides in inciting somebody to action with reference to the accompanying drawings now explains the present invention and further preferred embodiment thereof in detail.Identical parts have identical mark in institute's drawings attached; For clear, already mentioned Reference numeral is omitted in the accompanying drawing of back.
Fig. 1 has shown the Coriolis mass flowmeter that is used to generate mass flow measurement with side view perspective ground,
Fig. 2 schematically illustrates the measurement instrument preferred embodiment of the Coriolis mass flowmeter that is applicable to Fig. 1 with block diagram,
Fig. 3 has shown the partial cross section example of embodiment of the vibration-type measuring transducer of the Coriolis mass flowmeter that is applicable to Fig. 1 with first side view perspective ground,
Fig. 4 with second side view perspective ground shown Fig. 3 measuring transducer and
Fig. 5 has shown the embodiment of motor exciting bank of the measuring transducer of Fig. 3.
Fig. 1 has shown Coriolis mass flowmeter 1 with having an X-rayed, the mass flow measurement X that it is used for detecting the mass rate m of the mobile medium of pipeline and forms instantaneous this mass rate of representative
mFor the sake of clarity, the pipeline that do not draw.In fact medium can be any flowable materials, for example liquid, gas or steam.For this reason, Coriolis mass flowmeter 1 involving vibrations type measuring transducer 10 and the measurement instrument electronic installation 50 that is electrically connected with measuring transducer 10 shown in Figure 2.In order to settle measurement instrument electronic installation 50, electronic device housing 200 also is provided, it is installed in measuring transducer 10 outsides.
In order to detect mass rate m, by means of producing Coriolis force in the fluid that flows therein by the measuring transducer 10 of measurement instrument electronic installation 50 excited vibrations in operation, Coriolis force depends on mass rate m and can measure on measuring transducer 10, promptly can be by sensor and can be by electronic analysis.Except generating mass flow measurement X
m, Coriolis mass flowmeter also is used to measure the density p of flow media and the density measurement X that determines instantaneous representative density p
ρ
Preferably, measurement instrument electronic installation 50 is also designed like this, make it to measure and/or other service data via data transmission system and the exchange of higher level's measured value processing unit at Coriolis mass flowmeter 1 duration of work, described measured value processing unit for example is programmable logic controller (PLC) (PLC), PC and/or workstation, and described data transmission system for example is a field bus system.In addition, also like this design measurement instrument electronic installation 50 makes it to be powered by exterior source of energy, for example even via aforementioned field bus system.For the situation that provides the vibration survey instrument to be used to be coupled to fieldbus, particularly programmable measurement instrument electronic installation 50 has the corresponding communication interface and is used for data communication, for example is used for measurement data is sent to higher level's programmable logic controller (PLC) or higher level's Process Control System.
Fig. 3 and 4 has shown an embodiment as the oscillating mode physical electronic transducer setting of measuring transducer 10.The 26S Proteasome Structure and Function of this transducer is well known by persons skilled in the art and for example in US-A 60 06 609 detailed description is arranged.
Treat that in order to guide fluid measured, measuring transducer comprise that at least one has the measuring tube 13 of inlet end 11, endpiece 12, its have can be scheduled to during operation can elastic deformation measuring tube inner chamber 13A and have the Nominal Width that can be scheduled to.Here, the elastic deformation of measuring tube inner chamber 13A means, for the Coriolis force of the sign fluid that produces fluid inside, the spatial form of measuring tube inner chamber 13A and/or locus in the elastic range of measuring tube 13 with the mode that can be scheduled to periodic variation particularly circularly; For example referring to US-A 48 01 897, US-A56 48 616, US-A 57 96 011 and/or US-A 60 06 609.In addition, here be also noted that, although the measuring transducer among the embodiment only comprises a straight measuring tube, but in order to realize the present invention, this vibration-type measuring transducer also can use the in fact illustrated any Coriolis mass and flow measuring transducer of prior art, particularly has fully or to this crooked oscillation mode transmitter of small part with the crooked or straight measuring tube of crooked mode of oscillation vibration.Particularly suitable for example is the vibration-type measuring transducer with two parallel bend measuring tubes of being flowed through by testing medium, such as what describe in detail in following document: EP-A 1 154 243, US-A53 01 557, US-A 57 96 011, US-B 65 05 519 or WO-A02/37063.This other suitable embodiment that is used as the transducer setting of measuring transducer 10 can for example obtain in following document: WO-A02/099363, WO-A02/086426, WO-A95/16897, US-A56 02 345, US-A 55 57 973 or US-A 53 57 811.As the material of employed measuring tube 13, for example titanium alloy is suitable especially.Yet, replace titanium alloy, can use the normally used material of other this particularly bend measuring tube, for example, stainless steel, tantalum or zirconium etc.
Measuring tube 13 communicates in its entrance side and outlet side and introducing or the pipeline of drawing fluid in common mode, this measuring tube by clamp oscillatorily in the supporting frame 14 of the particularly counter-bending of rigidity and distortion.Replace the box-like supporting frame 14 of demonstration here, can certainly use other suitable supportive device, such as parallel with measuring tube or axially extending pipeline.
Supporting frame 14 utilizes access panel 213 to utilize exit plate 223 to be fixed to measuring tube 13 at its outlet side at its entrance side, the corresponding extension of the tested buret 13 of these plates and penetrating.In addition, supporting frame 14 has first side plate 24 and 34, two side plates of second side plate 24,34 are fixed to access panel 213 and exit plate 223 respectively, make them be arranged essentially parallel to that measuring tube 13 extends and with its at a distance of being provided with, and each other apart; Referring to Fig. 3.By this way, the opposed facing side surface of two side plates 24,34 is parallel to each other equally.Vertically rod 25 is fixed to side plate 24,34, with measuring tube 13 apart, with balance mass as the vibration of absorptiometry pipe 13.As shown in Figure 4, but vertically the rod 25 whole oscillation length that are arranged essentially parallel to measuring tube 13 extend; Yet this is not essential, because vertically rod 25 also can be done shortlyer as required.So, have two side plates 24,34, access panel 213, exit plate 223 and vertically the supporting frame 14 of rod 25 have and be arranged essentially parallel to the virtual vertical gravity vertical that is connected the measuring tube central axis 13B of inlet end 11 and endpiece 12.
Among Fig. 3 and 4 with screw head indication, above-mentioned side plate 24,34 is fixed to access panel 213, exit plate 223 and vertically rod 25 can connect by spinning and realize; Yet, also can use other suitable fastening type known in the art.
For measuring transducer 10 will by releasably with the situation of pipeline assembling, form first flange 19 and form second flange 20 at the entrance side of measuring tube 13, as shown in Figure 1 at outlet side; Yet, replace flange 19,20, can form other conduit coupling and be used for releasably linking to each other with pipeline, all so-called as shown in Figure 3 three-dimensional clips (triclamp) connect.Yet if desired, measuring tube 13 can also for example utilize welding or brazing etc. directly to link to each other with pipeline.
In order to produce described Coriolis force, at measuring transducer 10 duration of works, by the motor exciting bank 16 that is coupled to measuring tube with the oscillation frequency that can be scheduled to particularly natural resonance frequency drive measuring tube 13 with so-called useful mode vibration, and measuring tube 13 is by the mode elastic deformation being scheduled to then, and wherein natural resonance frequency also depends on the density of fluid.In described embodiment, as common in the situation about being provided with at crooked oscillation mode transducer, the measuring tube 13 of vibration spatially particularly laterally is offset static rest position.Basically also is same for wherein one or more bend measuring tubes around the transducer setting that respective virtual connects the longitudinal axis execution oscillating cantilevered beam of inlet and endpiece; Perhaps the bending vibration in single plane of oscillation of transducer setting only carry out to(for) wherein one or more straight measuring tubes also is same.
The electric excitation power P that provides from measurement instrument electronic installation 50 by conversion is provided exciting bank 16
Exc, and produce the exciting force F that acts on the measuring tube 13
ExcExciting power P
ExcBasically only be used for compensating because machinery and fluid internal friction and the power section of removing from oscillatory system.In order to obtain high as far as possible efficient, as far as possible accurately regulate exciting power P
Exc, make the vibration of measuring tube 13 be maintained at useful pattern basically, for example be fundamental resonance frequency.
For with exciting force F
ExcBe delivered on the measuring tube 13, as shown in Figure 5, exciting bank 16 has the electromagnetism of rigidity and/or the lever of motorized motions is provided with 15, and it comprises cantilever 154 and yoke 163, and wherein cantilever is fixed on the measuring tube 13 counter-bendingly.Yoke 163 is fixed on cantilever 154 and measuring tube 13 end apart equally counter-bendingly, and makes it be arranged on measuring tube 13 tops and horizontal with it.Cantilever 154 can for example be a metal washer, and it is contained in measuring tube 13 in the hole.For lever other suitable embodiment of 15 is set, already mentioned US-A60 06 609 all is incorporated in here as a reference.Lever be provided with 15 be T shape and be provided with like this, referring to Fig. 5, make its basic half point between entrance and exit end 11,12 act on measuring tube 13, have its maximum transversal skew during operation at the middle part thereby manage 13.
For activation lever is provided with 15, as shown in Figure 5, exciting bank 16 comprises: first drive coil 26 and the first permanent magnetism armature 27 related with it, and second drive coil 36 and the second permanent magnetism armature 37 related with it.Two drive coils that are electrically connected in series 26,36 particularly releasably are being fixed on the supporting frame 14 on the both sides of the measuring tube under the yoke 163 13 with having advantage, make them interact with their armatures 27 and 37 separately during operation.If desired, two drive coils 26,36 can certainly be connected in parallel with each other.Shown in Fig. 3 and 5, two armatures 27,37 are fixed to yoke 163 by this way each other apart, make at measuring transducer 10 duration of works armature 27 basic magnetic field penetration and this armature 37 basic magnetic field penetrations by drive coil 36 by drive coil 26.So armature is owing to electronic and/or electromagnetic force effect is accordingly moved.Moving of the armature 27,37 that utilizes the magnetic field of drive coil 26,36 and produce is delivered on the measuring tube 13 by yoke 163 and cantilever 154.These motions of structure armature 27,37 like this make yoke 163 alternately be offset from its rest position on the direction of side plate 24 or on the direction of side plate 34.Lever is provided with the 15 corresponding turning axles parallel with described measuring tube central axis 13B can for example pass through cantilever 154.
In addition, supporting frame 14 comprises the support 29 of motor exciting bank 16, and it particularly releasably links to each other with side plate 24,34, especially for supporting drive coil 26,36 and possible electromagnetic brake discussed below that each parts of 217 are set.
At last, measuring transducer 1 has the measuring transducer shell 100 around measuring tube and supporting frame, with the external action of protecting them to avoid being harmful to.Measuring transducer shell 100 has neck shape transition piece, fixedly holds the electronic device housing 200 of measurement instrument electronic installation 50 on it, referring to Fig. 1.
In the situation of the measuring transducer 10 of described embodiment, cause the elastic deformation of its measuring tube inner chamber 13A simultaneously in the lateral deflection of the vibration survey pipe 13 of inlet end 11 and endpiece 12 firm clamps, this distortion forms on the whole length of measuring tube 13 basically.In addition, because lever is provided with 15 moments of torsion that act on the measuring tube 13, on measuring tube 13, produce simultaneously around the distortion of measuring tube central shaft 13B with lateral deflection at least in part, thus the measuring tube 13 bending vibration torsional mode vibration to mix basically, and this pattern is as useful pattern.In this case, the distortion of measuring tube 13 can form like this, makes the lateral deflection of the lateral deflection of cantilever 154 and measuring tube 13 end apart and measuring tube 13 or in the same way or oppositely.So measuring tube 13 can be carried out torsional oscillation in the first crooked vibration torsional mode corresponding to situation in the same way; Perhaps in the second crooked vibration torsional mode, carry out torsional oscillation corresponding to inversion condition.So, in the embodiment of measuring transducer 10, so for example two times of second of the 900Hz crooked vibration torsional mode nature fundamental resonance frequency big first crooked vibration torsional mode.
Should only carry out the situation of the vibration of the second crooked vibration torsional mode during operation for measuring tube 13, be provided with 217 based on the electromagnetic brake of vortex principle and be integrated in the exciting bank 16, be used to stablize the position of described turning axle.So, utilize electromagnetic brake to be provided with 217, can guarantee measuring tube 13 always with the second crooked vibration torsional mode vibration, and therefore on measuring tube 13 possible external disturbance influence can not cause the spontaneous particularly first crooked vibration torsional mode of another kind that is converted to.The details of this electromagnetic brake setting specifies at US-A 60 06 609.
Be noted here that when measuring tube 13 deflects with the second crooked vibration torsional mode, virtual measurement tube hub axle 13B slight deformation, and thereby do not generate the plane in the duration of oscillation, but generate the curved surface of distortion slightly.In addition, the track of the mid point of measuring tube central shaft has minimum curvature in the track of being had a few of measuring tube central shaft in this curved surface.
For the deformation of check measurement pipe 13, measuring transducer 10 comprises that also sensor is provided with 60, and on behalf of first of this vibration, it produces by means of at least one first sensor 17 that the vibration of measuring tube 13 is reacted to some extent particularly simulate oscillation measurement signal s1.Sensor 17 can for example utilize the permanent magnetism armature and construct, this permanent magnetism armature be fixed on the measuring tube 13 and with the cell winding reciprocation of supporting frame 14 upper supports.For sensor 17, the particularly suitable deflection speed that is based on electric principle detection measuring tube 13.Yet, also can use the acceleration analysis electrodynamic transducer, perhaps even use deflection distance to measure or optical sensor.Certainly, also can use other sensor of checking this vibration that is applicable to known in the art.Sensor is provided with 60 and also comprises second sensor 18, and it is identical with first sensor 17 especially.Second sensor 18 sends the second oscillation measurement signal s2 that represents the vibration of measuring tube 13 equally.In this embodiment, two sensors 17,18 are arranged in the measuring transducer 10 along measuring tube 13 separated from one anotherly, and the mid point of range observation pipe 13 distance equates especially. Sensor 17,18 is set like this, makes sensor that 60 vibrations that detect at the entrance side and the outlet side of measuring tube 13 are set locally, and these vibrations are reflected as corresponding oscillation measurement signal s1 or s2 respectively.The first measuring-signal s1 and also have the second measuring-signal s2 each expression signal frequency corresponding with the ringing frequency of measuring tube 13 usually if necessary, these two signals are admitted to measurement instrument electronic installation 50, as shown in Figure 2.
Have degree of amplitude modulation and adjustable excitation frequency f in order to make measuring tube 13 vibrate, to present to exciting bank 16
CxcThe exciting current i of same vibration
Exc, make drive coil 26,36 be flowed through by electric current during operation, and generate the required magnetic field of mobile armature 27,37 in the corresponding way.Exciting current i
ExcIt can be for example sinusoidal or rectangle.Preferably in described measuring transducer embodiment, select and regulate exciting current i like this
ExcExcitation frequency f
Exc, make the measuring tube 13 of swaying as far as possible only vibrate with the second crooked vibration torsional mode.
In order to generate and regulate exciting current i
Exc, measurement instrument electronic installation 50 comprises corresponding driving circuit 53, it is by representative excitation frequency f to be regulated
ExcFrequency adjustment signal y
FMAnd representative exciting current i to be regulated
ExcThe amplitude adjusted signal y of amplitude
AMControl.The baric flow converter that driving circuit can for example utilize voltage controlled oscillator to be connected with the downstream is realized; Yet, replace simulative generator, can also use numerically controlled digital oscillator to be used to regulate exciting current i
Exc
In order to produce amplitude adjusted signal y
AM, can for example use the amplitude control circuit 51 that is integrated in the measurement instrument electronic installation 50, it is based at least one instantaneous amplitude and the corresponding constant or variable amplitude reference value W among two sensor signal s1, the s2
1And realization amplitude adjusted signal y
AMIf desired, also can the parametric excitation current i
ExcInstantaneous amplitude be used to generate amplitude adjusted signal y
AMThis amplitude control circuit is known equally for those skilled in the art.Example about this amplitude control circuit refers again to " PROMASS I " serial coriolis mass flowmeters.Its amplitude control circuit has advantage ground to be realized like this, makes the swaying of measuring tube 13 be controlled as constant amplitude, promptly irrelevant with density p.
About frequency adjustment signal y
FM, it can obtain from correspondent frequency control circuit 52, and it is for example at least based on sensor signal s1 and based on being used as correspondent frequency reference value W
2And represent the DC voltage of frequency and realize.
Have advantage ground, frequency control circuit 52 and driving circuit 53 are connected in the phaselocked loop together, and phaselocked loop is used in mode known in the art, based in sensor signal s1, s2 one of at least and exciting current i to be regulated or that measure
ExcBetween the phase differential that records, and with frequency adjustment signal y
FMFixedly be tuned to the transient resonance frequency of measuring tube 13.This being used for measuring tube with the structure of the phaselocked loop of their mechanical resonant frequency operation with use and for example detailed description is arranged at US-A48 01 897.Certainly, also can use other frequency control circuit well known in the art, for example illustrated in US-A 45 24 610 or US-A 48 01 897.In addition, consider the use of this frequency control circuit of the measuring transducer of described type, with reference to already mentioned " PROMASS I " series.Can adopt other circuit that is applicable to driving circuit, for example US-A 58 69 770 or US-A 65 05 519.
In another embodiment of the present invention, digital signal processor DSP that utilization provides in measurement instrument electronic installation 50 and corresponding enforcement and the program code that moves are therein realized amplitude control circuit 51 and frequency control circuit 52.Program code can continue or even for example for good and all be stored in the nonvolatile memory EEPROM of microcomputer 55 of control and/or pilot signal processor, and for example can when signal processor DSP starts, be written in signal processor DSP among the volatile data memory RAM of integrated measurement instrument electronic installation 50.The signal processor that is applicable to this application for example is the model TMS320VC33 that can obtain from TexasInstruments Inc. company on market.
In fact, clearly utilize corresponding modulus converter A/D, can be converted to digital signal corresponding, be used for handling at signal processor DSP to major general's sensor signal s1 and possible sensor signal s2; About this point, referring to EP-A 866 319.If desired, the conditioning signal that sends from signal processor, for example amplitude adjusted signal y
AMOr frequency adjustment signal y
FMAlso can be by digital-to-analog conversion in the corresponding way.
As shown in Figure 2, oscillation measurement signal x
S1, x
S2Also be fed to the metering circuit 21 of measurement instrument electronic installation.Metering circuit 21 is used for manner known in the art based on two oscillation measurement signal x
S1, x
S2Between the phase differential that detects and determine measured value corresponding to mass rate to be measured, wherein two oscillation measurement signals may be regulated in advance suitably.Metering circuit 21 can be many metering circuits a kind of in the digital circuit particularly who is generally used for this purposes, and it is based on oscillation measurement signal x
S1, x
S2Determine mass rate, about this point, especially referring to above-mentioned WO-A02/37063, WO-A99/39164, US-A 56 48 616, US-A 50 69 074.Certainly, can use known in the art other to be applicable to the metering circuit of Coriolis mass flowmeter, its measurement and corresponding analysis are at oscillation measurement signal x
S1, x
S2Between phase place and/or mistiming.Have advantage, metering circuit 21 can utilize signal processor DSP to realize equally.
As already mentioned above, heterogeneity in the flow media, for example the froth bed of bubble that exists in the liquid or formation can cause the common measured value definite based on being assumed to uniform dielectric enough accurately not consistent with the actual mass flow, that is, value need be proofreaied and correct suitably; So the measured value of this predetermined temporary transient representation quality flow is designated as the first intermediate value X '
m, utilize analytical electron device 21 to obtain mass flow measurement X by this first intermediate value
m, it is representation quality flow accurately enough.
About this point, discussed in the prior art, depend on measuring principle, this heterogeneity is shown as the variation in the density of being measured by flow media.Yet inventor's further investigation finds surprisingly, and is opposite with explanation of the prior art, intermediate value X '
mCorrection can carry out on the one hand by using the very simple correction factor of determining seldom, these correction factors self can be from the parameter of direct measurement, particularly the mass rate of density of Ce Lianging and measurement in advance and obtaining.On the other hand, correction can be used initial density measurement X ρ that determines and the initial intermediate value X ' that determines
mCarry out, and contrast to comparatively complicated computing method to compare evaluation work quite little.
In order accurately to measure mass rate, analytical electron device 2 is from intermediate value X '
mObtain corresponding correction value X
K, and for intermediate value X '
mUse corrected value X
KAnd calculated mass flow measurements X digitally particularly
mFor example, correction can be carried out based on following formula in simple mode:
X
m＝(1+X
K)·X’
m(1)
According to the present invention, the analytical electron device is for this reason from intermediate value X '
mObtain the second intermediate value X
2The second intermediate value X
2Represent the functional value X ' of power function
m n, intermediate value X ' wherein
mThe end of as, and index n is in particular minus rational number.That is the second intermediate value X,
2Should follow funtcional relationship:
X
2＝K
K·X′
m n，n＜0 (2)
K wherein
KBe to be used for coupling or proportional zoom intermediate value X
2Coefficient, and can pre-determine, for example when demarcating Coriolis mass flowmeter 1, determine separately, perhaps specific, and stored digital is in nonvolatile memory EEPROM for example by meter type.According to one embodiment of present invention, selection index n for example is-0.5 or-0.25 greater than-1 here.
In of the present invention further developing, the analytical electron device is based on density measurement X
ρAnd determine the deviation delta ρ of density of medium ρ and predetermined reference density based on initial that determine or simultaneously-measured reference density value K ρ, wherein K ρ can be for example stores as steady state value between the starting period or is passed to coriolis mass flowmeters from the outside during operation at coriolis mass flowmeters.In order to generate corrected value X
k, the deviation delta ρ of Que Dinging is utilized the second intermediate value X according to following formula like this
2Handle
X
K＝Δρ·X
2 (3)
Reference density value K ρ can be based on for the understanding for the treatment of fluid measured and manually input, for example online input or from the remote control room input, perhaps it can for example be sent to the measurement instrument electronic installation via fieldbus from outside densitometer.
According to embodiments of the invention, use the density measurement X that is stored in equally in the measurement instrument electronic installation
ρ, 0Determine reference density value K ρ, wherein Cun Chu density measurement X
ρ, 0Representative is in uniform dielectric or be assumed to the Media density of measuring in the uniform medium.In the further developing of this embodiment of the present invention, as the density measurement X of reference density value K ρ storage
ρ, 0Be used for before at the definite intermediate value X ' of nonhomogeneous media
mFollow-up correction.This embodiment of the present invention can for example use in the situation of feed or filling process in the mode that has advantage especially, wherein, once in the short time, there is significantly different flox condition in the measuring tube within the charging on the one hand, especially measuring tube not by the situation of complete filling in, and on the other hand, interested is to obtain total mass rate by whole charging, and the gross mass of special concern perfusion.
Use formula (2), formula (3), can determine corrected value (X in simple mode according to following formula
K)
Above-mentioned function by formula (1)～(4) expression is used to generate mass flow measurement X
m, these functions can be realized in the AG 54 of measurement instrument electronic installation 50 at least in part.AG 54 can have advantage ground and for example utilize signal processor DSP equally or for example utilize above-mentioned microcomputer 55 and realize.
The structure of respective algorithms and implement corresponding to previous equations or represent the function of amplitude control circuit 51, frequency control circuit 52 and they are translated as executable program code in the sort signal processor, these all are technology well-known to those skilled in the art and thereby do not need detailed explanation.Certainly, above-mentioned equation also can the representative wholly or in part by the simulation of corresponding discrete assembling in measuring electronic installation 50 and/or digital computing circuit.
In another embodiment of the present invention, analytical electron device 2 also has the table storer, wherein stores one group of predetermined digital correction values X
K, i, they for example pre-determine when demarcating Coriolis mass flowmeter.For example by the instantaneous effective second intermediate value X
2The storage address that obtains is visited these corrected values X
K, iCorrected value X
K, iCan for example determine in simple mode, thus instantaneous definite intermediate value X
2Quilt and the intermediate value X that correspondingly in the table storer, imports
2Preset value relatively, and read each corrected value X based on this comparative result
K, i, its corresponding to intermediate value X
2Immediate preset value.The table storer can be a programmable read only memory, that is, and and EPROM or EEPROM.The use of this table storer has the following advantages: for having calculated intermediate value X working time
2Can very rapidly utilize corrected value X afterwards
kIn addition, for example based on equation (2) and use the least square method, can very accurately determine the corrected value X of input table storer in advance based on calibration measurements result seldom
K, i
Claims (8)
1. coriolis mass flowmeters, particularly Coriolis-type mass flowmeter/densimeter are used for the mass rate of particularly two-phase or multiphase medium that measuring channel flows, and this coriolis mass flowmeters comprises:
-at least one inserts ducted measuring tube (11), and it is in operation by the MEDIA FLOW warp;
-supportive device (12), its be fixed to the inlet end of measuring tube (11) and endpiece and thereby clamping measuring tube oscillatorily;
-exciting bank (13), it makes measuring tube (11) carry out mechanical oscillation in operation, particularly crooked vibration;
-osciducer (141,142) is used for producing:
-the first oscillation measurement signal (x
S1), it represents the entrance side vibration of measuring tube (11), and
-the second oscillation measurement signal (x
S2), it represents the outlet side vibration of measuring tube (11); With
-analytical electron device (2),
--it produces from oscillation measurement signal (x
S1, x
S2) the temporary transient representative mass rate to be measured that obtains first intermediate value (X '
m), and produce from first intermediate value (X '
m) obtain be used for first intermediate value (X '
m) corrected value (X
K), and
--its utilize first intermediate value (X '
m) and corrected value (X
K), the mass flow measurement (X of definite representative mass rate to be measured
m),
--wherein the analytical electron device use from first intermediate value (X '
m) the second intermediate value (X that obtains
2) generation corrected value (X
K), this second intermediate value is represented power function X '
m nFunctional value, wherein power function with intermediate value (X '
m) end of as and have the minus index (n) that is in particular rational number.
2. according to the coriolis mass flowmeters of claim 1,
-wherein analytical electron device (2) sends density measurement (X ρ), and it is represented density of medium and is from the first and/or second oscillation measurement signal (x
S1, x
S2) obtain, and
-wherein analytical electron device (2) also utilizes density measurement (X
ρ) determine corrected value (X
K).
3. according to the coriolis mass flowmeters of claim 2, wherein analytical electron device (2) utilizes density measurement (X
ρ) determine the deviation (Δ ρ) of Media density and predetermined reference density, and determine corrected value (X according to following equation
K):
X
K＝Δρ·X
2
4. according to the coriolis mass flowmeters of claim 3, wherein analytical electron device (2) is determined corrected value (X according to following polynomial expression
K):
5. according to the coriolis mass flowmeters of claim 4, wherein analytical electron device (2) is determined mass flow measurement (X according to following equation
m):
X
m＝(1+X
K)·X
m′
6. according to the coriolis mass flowmeters of aforementioned arbitrary claim, wherein analytical electron device (2) has the table storer, and wherein storage depends on the second intermediate value (X
2) the digitizing corrected value, wherein show the storer utilization based on the second intermediate value (X
2) the number storage reference address that forms and send corrected value (X
K).
7. be used to utilize coriolis mass flowmeters, particularly Coriolis-type mass flowmeter/densimeter generates the first measured value (X of the mass rate of representing the medium that flows in the pipeline
m) method, this method may further comprise the steps:
-causing the vibration of the coriolis mass flow meter measurement pipe (11) that medium is flowed through, particularly crooked vibration is to produce Coriolis force;
-detect the vibration of measuring tube (11), and generate the first measuring-signal (x that represents the entrance side vibration
S1) and represent the second measuring-signal (x of outlet side vibration
S2), be used to obtain temporary transient representation quality flow intermediate value (X '
m) and obtain for intermediate value (X '
m) corrected value (X
K),
--wherein, for from first intermediate value (X '
m) generation corrected value (X
K), obtain the second intermediate value (X
2), it represents power function X '
m nFunctional value, this power function have described intermediate value (X '
m) end of as and have the minus index that is in particular rational number; And
-utilize corrected value (X
K) the correction intermediate value (X '
m).
8. according to the method for claim 7, further comprising the steps of:
-according to measuring-signal (x
S1, x
S2) obtain representing the second measured value (X of Media density
ρ); And
-use second measured value (the X
ρ) obtain corrected value (X
K).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10358663.6A DE10358663B4 (en) | 2003-12-12 | 2003-12-12 | Coriolis mass flow measuring device |
| DE10358663.6 | 2003-12-12 | ||
| DE102004007889.0 | 2004-02-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1890537A true CN1890537A (en) | 2007-01-03 |
Family
ID=34638697
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200480036981XA Expired - Fee Related CN100507466C (en) | 2003-12-12 | 2004-12-07 | Coriolis mass flowmeter |
| CNA2004800368605A Pending CN1890537A (en) | 2003-12-12 | 2004-12-07 | Coriolis mass flowmeter |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200480036981XA Expired - Fee Related CN100507466C (en) | 2003-12-12 | 2004-12-07 | Coriolis mass flowmeter |
Country Status (2)
| Country | Link |
|---|---|
| CN (2) | CN100507466C (en) |
| DE (1) | DE10358663B4 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103674138A (en) * | 2012-09-10 | 2014-03-26 | 克洛纳有限公司 | Flow measuring device |
| CN104685325A (en) * | 2012-06-18 | 2015-06-03 | 克洛纳测量技术有限公司 | Method for operating a resonant measurement system, and associated resonant measurement system |
| CN106643989A (en) * | 2016-11-22 | 2017-05-10 | 重庆川仪自动化股份有限公司 | Density calibration system and method for mass flow meter |
| CN111819424A (en) * | 2018-03-06 | 2020-10-23 | 恩德斯+豪斯流量技术股份有限公司 | Coriolis measuring device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103052868A (en) * | 2010-08-02 | 2013-04-17 | 西门子公司 | Coriolis mass flowmeter and method for operating a coriolis mass flowmeter |
| DE102010035341B4 (en) * | 2010-08-24 | 2013-07-04 | Krohne Ag | Method for determining the viscosity of a medium with a Coriolis mass flowmeter |
| CN103175582B (en) * | 2011-12-21 | 2017-11-03 | 新奥科技发展有限公司 | Fluid metering method and apparatus |
| DE102015103484A1 (en) * | 2015-03-10 | 2016-09-15 | Endress + Hauser Conducta Gesellschaft für Mess- und Regeltechnik mbH + Co. KG | In-line measuring device |
| CN104949741A (en) * | 2015-06-29 | 2015-09-30 | 安徽汉威电子有限公司 | Full-automatic flow measuring device of water meter |
| CN108088502B (en) * | 2017-12-19 | 2024-06-25 | 中曼石油钻井技术有限公司 | Measurement method for improving measurement accuracy in ground oil test process |
| CN112840181B (en) * | 2018-10-29 | 2023-12-19 | 恩德斯+豪斯流量技术股份有限公司 | Method for correcting measured value of coriolis measuring device and coriolis measuring device |
| DE102018133117A1 (en) | 2018-12-20 | 2020-06-25 | Endress+Hauser Flowtec Ag | Coriolis mass flow meter |
| US20220057245A1 (en) * | 2018-12-21 | 2022-02-24 | Endress+Hauser Flowtec Ag | Coriolis mass flowmeter with magnetic field detector |
| DE102019123368A1 (en) | 2019-08-30 | 2021-03-04 | Endress + Hauser Flowtec Ag | Method and measuring device for determining the viscosity of a medium |
| PL3835021T3 (en) * | 2019-12-10 | 2022-05-23 | Saint-Gobain Placo | Apparatus and method for the production of a plaster slurry |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5469748A (en) * | 1994-07-20 | 1995-11-28 | Micro Motion, Inc. | Noise reduction filter system for a coriolis flowmeter |
| US5555190A (en) * | 1995-07-12 | 1996-09-10 | Micro Motion, Inc. | Method and apparatus for adaptive line enhancement in Coriolis mass flow meter measurement |
| DE19652002C2 (en) * | 1995-12-15 | 2003-03-27 | Flowtec Ag | Vibration meter |
| EP1281938B1 (en) * | 1998-12-11 | 2012-05-30 | Endress + Hauser Flowtec AG | Coriolis-type mass flowmeter/densimeter |
-
2003
- 2003-12-12 DE DE10358663.6A patent/DE10358663B4/en not_active Expired - Fee Related
-
2004
- 2004-12-07 CN CNB200480036981XA patent/CN100507466C/en not_active Expired - Fee Related
- 2004-12-07 CN CNA2004800368605A patent/CN1890537A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104685325A (en) * | 2012-06-18 | 2015-06-03 | 克洛纳测量技术有限公司 | Method for operating a resonant measurement system, and associated resonant measurement system |
| CN104685325B (en) * | 2012-06-18 | 2017-09-26 | 克洛纳测量技术有限公司 | Method and its Coherence resonance measuring system for operating resonance measurement system |
| CN103674138A (en) * | 2012-09-10 | 2014-03-26 | 克洛纳有限公司 | Flow measuring device |
| CN106643989A (en) * | 2016-11-22 | 2017-05-10 | 重庆川仪自动化股份有限公司 | Density calibration system and method for mass flow meter |
| CN106643989B (en) * | 2016-11-22 | 2023-10-24 | 重庆川仪自动化股份有限公司 | Density calibration system and method for mass flowmeter |
| CN111819424A (en) * | 2018-03-06 | 2020-10-23 | 恩德斯+豪斯流量技术股份有限公司 | Coriolis measuring device |
| US11365997B2 (en) | 2018-03-06 | 2022-06-21 | Endress+Hauser Flowtec Ag | Coriolis measuring device |
Also Published As
| Publication number | Publication date |
|---|---|
| DE10358663A1 (en) | 2005-07-07 |
| DE10358663B4 (en) | 2015-11-26 |
| CN100507466C (en) | 2009-07-01 |
| CN1894561A (en) | 2007-01-10 |
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