283results about "Direct mass flowmeters" patented technology

The invention relates to the technical field of profound hypothermia metering, and provides a low-temperature flow measuring device, an error calibration method and a measuring method.The device comprises a fluid source used for providing low-temperature fluid; an inlet of the measuring pipeline is connected with a fluid source; the measuring pipeline is connected with a detected flowmeter; the standard receiving tank is connected with the outlet of the measuring pipeline, and the standard receiving tank and the outlet of the measuring pipeline have two states of connection and disconnection; the static weighing module is used for statically weighing the standard receiving tank in a static measurement mode; and the dynamic weighing module is used for enabling the standard receiving tank to be separated from the static weighing module in the dynamic measurement mode and dynamically weighing the standard receiving tank. Through the arrangement, the final dynamic measurement result can ensure the traceability to the quality and the accuracy of the time reference, and has the advantages of continuous monitoring, rich data and efficient operation of the dynamic method, so that a high-performance dynamic flow measurement reference with both the accuracy of the static method and the continuity of the dynamic method is constructed.

An apparatus (100) for the production of a plaster slurry is described, the apparatus (100) comprising a mixer (102) for mixing at least plaster and water to form a plaster slurry, the mixer (102) comprising an outlet conduit (122), a foam generator (106) for mixing at least air, a foaming agent and water to produce a foam, the foam generator (106) in fluid communication with the mixer (102) via a fluid pathway (116) comprising a foam conduit (117); and a mass flow meter (124), wherein the mass flow meter (124) is configured to measure the density and mass flow rate of the foam within the foam conduit (117) or the plaster slurry within the outlet conduit (122). Additionally, a method of manufacturing a plaster slurry is described.

A method for improving flowmeter accuracy is provided. The flowmeter comprises at least one flow tube, at least one pickoff sensor attached to the flow tube, at least one driver attached to the flow tube, and meter electronics in communication with the at least one pickoff sensor and driver. The method comprises the steps of vibrating at least one flow tube in a drive mode vibration with the at least one driver and receiving a sensor signal based on a vibrational response to the drive mode vibration from the at least one pickoff sensor. An unremediated density is derived with the flowmeter. An unremediated mass flow is derived with the flowmeter. An extended drive gain is derived with the flowmeter. At least one flow variable is received. A density ratio is calculated. A plurality of wet gas coefficients is provided. A dry gas mass flow rate is calculated with the density ratio and at least one of the plurality of wet gas coefficients.

A measuring transducer includes: a transducer module including a housing and a coil within and connected with the housing; and, set in the transducer module, a transducer module including a tube and a magnet secured on a middle segment of the tube. The tube wall is so formed that a directrix of a channel surface of the middle segment extends outside a first reference plane of the measuring transducer defined by first and fourth reference axes, and the magnet is secured on the middle segment such that a second reference plane of the measuring transducer defined by second and fourth reference axes is parallel to a third reference plane defined by third and fifth reference axes or that the second and third reference planes intersect one another to form an angle of intersection of no more than 1°.

The present disclosure relates to a measuring method and device for trace and ultra-trace oil content. The measuring device of the present disclosure includes a cryogenic enriching device, an extracting device and an infrared spectrometer; The cryogenic enriching device includes a Dewar container and a U-shaped pipe; The extracting device includes an extractant container, an input pipe, an outlet pipe and an extraction liquid quantitative pipe; A mass flowmeter is further disposed on the U-shaped pipe, the oil content in the gas is calculated according to the measured total mass of the gas and the oil concentration of the extraction liquid measured by the infrared spectrometer. The present disclosure further provides a measuring method, which converts the measurement of oil content in gas into the measurement of oil concentration in liquid extractant through effective extraction by liquid nitrogen cold trap enrichment mode, and adopts infrared spectrophotometry to accurately measure.

To provide a meter electronics for validating a sensor assembly using a parameter of a sensor signal provided by the sensor assembly.SOLUTION: The meter electronics includes an interface communicatively coupled to the sensor assembly and configured to receive the two sensor signals, and a processing system communicatively coupled to the interface. The processing system is configured to calculate a sensor signal parameter relationship value between the two sensor signals and compare the calculated sensor signal parameter relationship value between the two sensor signals to a baseline sensor signal parameter relationship value between the two sensor signals.SELECTED DRAWING: Figure 5

A laminar flow element including a single-piece layer of sheet stock having a first surface and a second surface opposite the first surface. The layer is an annular flat disk. The first surface includes at least one channel formed by etching. Sidewalls are formed by the at least one channel, the sidewalls having a height sufficient to create a transverse laminar flow.

A method of determining a process related parameter value from two or more vibration modes is provided. The method comprises vibrating, with a drive signal, a sensor assembly in a first vibration mode, vibrating, with the drive signal, the sensor assembly in a second vibration mode, and estimating a process related parameter value based on the first vibration mode and the second vibration mode.

Devices and methods include a Coriolis flow meter including a first and second manifolds made from a polymer material. Each manifold includes a respective tubular port extension extending outward from a surface of the manifold. A flow-sensitive tube made from the polymer material is attached at a first end to the first tubular port extension and attached at a second end to the second tubular port extension. An isolating structure is clamped around a portion of the first tubular port extension and positioned adjacent to the surface of the first manifold. The isolating structure is made from a second material different from the polymer material.

The invention relates to the technical field of oil and gas field moisture on-line metering, in particular to a moisture bimodal metering system based on vortex reinforcement for a gas well, which comprises a three-section type vortex separation pipe and a metering unit. The separation pipe adopts a spiral flow deflector and an umbrella-shaped flow stabilizer, so that the separation efficiency is enhanced, and the pressure drop is reduced; the metering unit realizes high precision through pressure-temperature compensation, and meanwhile, the accuracy is improved by combining a Coriolis flowmeter and density feedback calibration; the liquid level is controlled by adopting a fuzzy PID algorithm, and the response time is less than or equal to 2s. The device can remarkably improve the metering precision, and is suitable for efficient separation and precise metering of conventional gas field moisture.

The invention provides a hydrogen fuel flow metering correction method based on a two-dimensional interpolation flow coefficient, and relates to the technical field of hydrogen turbine aero-engine control, and the method comprises the following steps: firstly, obtaining test data under different working conditions; then, a two-dimensional interpolation table of the flow coefficient is constructed based on the metering valve inlet pressure and the opening area after dead zone correction, the flow coefficient is monotonically decreased relative to the opening area by adjusting the dead zone area base value, and interpolation table shaping is completed; and finally, in real-time control, a flow coefficient is obtained by looking up a table through current working condition parameters, and a corrected metering valve opening area instruction is calculated through an iteration method. According to the method, the metering error of the hydrogen fuel mass flow is reduced from 30% to 3% or below through the flow coefficient of the dynamic matching working condition and dead zone correction, the flow metering and control precision is remarkably improved, and the problem that the theoretical mass flow error is large in existing sound velocity flow small hole node flow metering is solved.

Disclosed in the present invention are a flow divider and a Coriolis flowmeter, wherein the flow divider is of a cylindrical structure, N branch flow guide ports are formed in the cylinder bottom of the flow divider, and N is a positive integer not less than 2. The branch flow guide ports are non-circular. The total area of the N branch flow guide ports is S1, and the flow divider satisfies the following conditions: if the N non-circular branch flow guide ports are replaced with N circular branch flow guide ports, and the maximum total area of the N circular branch flow guide ports is S2, S1>S2. Compared with the prior art, the present invention can increase the integral cross sectional area of the N branch flow guide ports of the flow divider, and under the condition of certain pressure, the flow of the flow divider is greatly increased, and the pressure loss is greatly reduced.

Monitoring a mass flowmeter includes ascertaining a resonant frequency of a bending oscillation, wanted mode, and a density measured value of a medium as a function of the frequency. A bending oscillation is excited outside of resonance with an excitation signal having an amplitude and a frequency (μ times the resonant frequency of the bending oscillation, wanted mode). An amplitude of a sensor signal of the bending oscillation outside of resonance is ascertained. A value of an integrity function of the measuring tube depending on a ratio of the sensor signal amplitude to the excitation signal amplitude of the bending oscillation is ascertained. The integrity function depends further on a density term of a transfer function that models contributions of a plurality of oscillation modes to the sensor signal. This function is reduced to reference conditions, and / or transformed to an integrity value, which has no cross sensitivities for media density.

Method (100) for classifying coatings (230) in a measuring tube (200), comprising: determining (110) a damping value D for at least one vibration mode of an oscillator with at least one measuring tube (200) of a Coriolis mass flow sensor for guiding a medium (220); determining (120) a modal stiffness value k for at least one vibration mode; and classifying (150) the coating (230) as a function of the damping value D and the stiffness value k.

The invention relates to a Coriolis flowmeter comprising: - a measuring tube arrangement (4) with at least one measuring tube (3) and a fixed body arrangement (35); - at least one oscillation exciter (7) and at least one oscillation sensor (8); - a support arrangement (16) with a seat (29) and a fixing arrangement (34), wherein the fixing arrangement (16) has at least one swingable fixing element (40, 41), wherein the fixing arrangement (34) is adapted to mechanically releasably connect the measuring tube arrangement (4), in particular the at least one measuring tube (3), with a support arrangement body (62) via the fixed body arrangement (35), wherein the at least one fixing element (40, 41) is adapted to apply a bending force to the fixed body arrangement (35) to elastically bend the fixed body arrangement (35) in the case of connecting the measuring tube arrangement (4) with the support arrangement body (62).

The utility model discloses a transmitter housing and Coriolis mass flowmeter, the transmitter housing comprises a side assembly housing and an upper assembly housing, the side assembly housing is buckled and assembled on one side of the upper assembly housing, the side assembly housing is composed of a bottom housing and a side housing, the side assembly housing and the upper assembly housing are matched to form a closed housing, and the side assembly housing and the upper assembly housing are buckled and assembled on one side of the upper assembly housing. A plurality of threaded connecting seats are fixedly connected to the inner wall of the side assembling shell, a plurality of assembling bolt sets are in threaded connection between the side assembling shell and the threaded connecting seats, a limiting inner cylinder is fixedly connected into the side assembling shell, an assembling outer cylinder is fixedly connected to the side, close to the side assembling shell, of the upper assembling shell, and the outer side of the limiting inner cylinder is sleeved with the assembling outer cylinder. According to the transmitter shell and the Coriolis mass flow meter, the split type design is adopted, the splitting process of the transmitter shell of the Coriolis mass flow meter is simplified, and the convenience of maintaining and replacing all parts in the Coriolis mass flow meter is improved.

A flow meter coupling system (300) is provided to reduce axial stress on a flow meter (302) including a first flow meter flange (314a) and a second flow meter flange (314b). The flow meter coupling system (300) includes a first process fluid member (304) configured to couple to the first flow meter flange (314a) of the flow meter (302), a second process fluid member (306), and a second connector member (310) configured to rigidly couple to at least one of the second flow meter flange (314b) or the second process fluid member (306) and to couple to the other of the second flow meter flange (314b) or the second process fluid member (306) in a manner that does not substantially provide axial stress.

The invention relates to a measuring system comprising an electrical-physical-electrical measuring transducer (10) having at least one vibration element (111), an exciter arrangement coupled to the vibration element for bringing about a measurement effect that is dependent on the measurement variable, and a sensor arrangement coupled to the vibration element for providing a sensor signal (s1) that represents the measurement effect. In addition, the measuring system comprises measuring system electronics (20) electrically connected to the exciter arrangement and sensor arrangement. The measuring system electronics (20) feed electric power into the exciter arrangement by means of an electrical driver signal (e1). The driver signal (e1) contains at least for part of the time a useful component (e1N1) having a predetermined signal frequency and signal amplitude and a useful component (e1N2) having a signal frequency fN2 that deviates from the signal frequency fN1 and a predetermined signal amplitude. In the process, the sensor signal (s1) contains measuring components (s1N1, s1N2) with corresponding signal frequencies fN1 and fN2. The measuring system electronics (20) determine measurement values for at least one measurement variable and detect disruptions of the measuring system if one of the signal amplitudes and / or phases of the measuring components (s1N1, s1N2) has a beat or such a beat is determined.

The present invention discloses a minute flow rate measuring device and measuring method based on the mass method, the measuring device comprising: an internal evaporation prevention cover; an external evaporation prevention assembly; a weighing balance; a liquid collection container; a packing assembly provided inside the liquid collection container, made of a low water absorption material, breathable, and having a containment cavity for containing the liquid to be measured between its lower end and the bottom of the liquid collection container; a capillary receiving tube having a liquid receiving port and a liquid discharge port at its upper and lower ends, respectively, with its lower end extending vertically through the packing assembly into the containment cavity and its upper end curving horizontally through the internal evaporation prevention cover; and a discharge tube installed horizontally, with its outlet passing through the external evaporation prevention assembly and aligned horizontally with the liquid receiving port, and maintaining a first interval, thereby drawing the liquid discharged from the outlet into the liquid receiving port at intervals.

The invention discloses an oil-gas-water mixed transportation metering device which comprises a main mounting pipe, one end of the main mounting pipe is provided with a first flow guide cover through a bolt, the input end of the first flow guide cover is communicated with an input pipe, and the other end of the input pipe is provided with a straight pipe type Coriolis mass flow meter through a bolt. The input end of the straight pipe type Coriolis mass flowmeter is communicated with a communicating pipe; liquid flows in the main installation pipe, the fluid model is calculated and measured through a plurality of optical measurement sensors with contrast light and without contrast light sources in the first installation pipe, and light diffraction, reflection and other conditions are collected through a transparent window of an embedded quartz window. The total mass flow rate and the branch mass flow rate are respectively measured by matching with system calculation integration, the overall accuracy is improved, the structural size is small, the application range is wide, use in various scenes is facilitated, and the overall use effect is improved.

The invention relates to a modular Coriolis flowmeter (1) for determining a process variable of a flowable medium, comprising: - a measuring tube module (M1), comprising a more particularly metal measuring tube (3a, 3b) for guiding the medium, a primary exciter component (23) which is arranged on the measuring tube (3a, 3b), a primary sensor component (24a, 24b) which is arranged on the measuring tube (3a, 3b), and a measuring tube module identifier (28) which has identification information; - a carrier module (M2), comprising a receptacle (11) in which the measuring tube module (M1) can be arranged or is arranged with a releasable connection in a first installation position or in a second installation position, which differs from the first installation position, in a mechanically fixed manner and yet able to be released again, an electronics chamber (30) in which evaluation electronics (ME) for determining the process variable are arranged, a secondary exciter component (13) which complements the primary exciter component (23) and a secondary sensor component (14) which complements the primary sensor component (24); - an installation position recognition device (19) which is configured to recognise the measuring tube module identifier (28), to determine the identification information and based on this to ascertain a current installation position, wherein the evaluation electronics (ME) are configured to determine the process variable depending on the recognised current installation position.

An electromagnetic transducer (17) for symmetric oscillations of a symmetrically oscillatory device (1) is provided. The electromagnetic transducer (17) comprises a first electromagnetic transducer portion having a first electromagnetic transducer portion center of mass (CM17a) and a second electromagnetic transducer portion having a second electromagnetic transducer portion center of mass (CM17b). The first electromagnetic transducer portion and the second electromagnetic transducer portion are symmetrically balanced.

In some implementations, a method is disclosed that may include operating the Coriolis meter on a process fluid where the process fluid may include a liquid continuous process fluid with particles. The method may include measuring a measured speed of sound of the process fluid, deriving a first correlation input parameter from the measured speed of sound the process fluid, determining at least one correlation output parameter utilizing an optimized Coriolis correction correlation between the correlation output parameter and the first correlation input parameter and at least a second correlation input parameter. Also, the method may include where the optimized Coriolis correction correlation is determined utilizing a training data set which relates the correlation input parameters to the correlation output parameters at a plurality of operating conditions and correcting the at least one measured Coriolis output parameter utilizing the at least one correlation output parameter.

The present invention relates to a modular measuring device (2), comprising: - a measuring tube module (4), wherein the measuring tube module (4) includes a fixing device (35); - an oscillation exciter (7); - at least one oscillation sensor (8); - a support module (16) including a base (23), wherein the measuring tube module (4) can be arranged in the base (23) of the support module (16), wherein the support module (16) includes a fixing device (34), wherein the fixing device (34) includes a shaft (100) implemented at least segmentally and eccentrically, wherein the fixing device (34), in particular the shaft (100), is adapted to clamp the measuring tube module (4) in the base (23) via the fixing device (35) and to mechanically detachably connect the measuring tube module (4) to the support module (16).

A transducer assembly (300) for a vibrating meter having meter electronics (20) is provided. The transducer assembly (300) comprises a keeper portion (401) comprising a keeper plate (402). A magnet portion (301) comprises a coil bobbin (305) and a coil (309) wound around the coil bobbin (305). A magnet (313) is coupled to the coil bobbin (305). The keeper plate (402) is prevented from contacting the coil bobbin (305).

A measuring device for metering a fluid. The measuring device includes a container with the fluid, a fluid inlet which is fluidically connected to the container, a fluid outlet which is fluidically connectable with a metering point, a metering line which connects the fluid inlet with the fluid outlet, a delivery pump arranged in the metering line, a density sensor arranged in the metering line, a flow meter arranged in the metering line, and a recirculation line which is arranged to branch off from the metering line downstream of the flow meter and to open into the container. The flow meter is arranged in a measuring unit housing which is arranged at a distance from a pump unit housing in which at least the delivery pump is arranged. The pump unit housing is detachably connected to the measuring unit housing via a connection portion of the metering line.

A flowmeter is provided that includes a sensor assembly (10) and a meter electronics (20). The flowmeter further has one or more flow tubes (130, 130’) and a drive mechanism (180) coupled to the flow tubes (130, 130’) and oriented to induce a drive mode vibration therein. A pair of pickoff sensors (170L, 170R) is coupled to the flow tubes (130, 130’), and is configured to measure a vibrational response induced by the drive mechanism (180). At least one strain gage (200A, 200B) is coupled to the sensor assembly (10), and configured to detect a strain in the sensor assembly (10). The meter electronics (20) is connected to the drive mechanism (180) and the strain gage (200A, 200B) in series. The meter electronics (20) is configured to detect frequencies at which changes in strain are occurring.

The utility model provides a mass flow meter capable of resisting installation deviation. The mass flow meter capable of resisting installation deviation comprises a flow meter body, two floating connecting pipes and two elastic pre-tightening mechanisms. Body connecting pipes are arranged at the two ends of the flowmeter body respectively, convex spherical sealing faces are formed on the outer walls of the body connecting pipes, concave spherical sealing faces are formed on the inner walls of the floating connecting pipes, and the convex spherical sealing faces and the concave spherical sealing faces are attached to form a spherical sealing pair. The elastic pre-tightening mechanism is used for applying axial pre-tightening force towards the body connecting pipe to the floating connecting pipe so as to maintain the sealing performance of the spherical sealing pair. When an external pipeline has angle deviation or slight radial dislocation, the floating connecting pipe can freely and finely adjust the posture around the sphere center of the spherical sealing pair, automatic compensation of the angle deviation and the slight radial dislocation of the pipeline in the installation process is achieved, and mechanical stress generated by the deviation is prevented from being transmitted to a vibration pipe of the flowmeter body. The metering precision problems such as zero drift and abnormal measurement are solved fundamentally, and the long-term metering stability and reliability of the flowmeter are improved remarkably.

Disclosed is a Coriolis flowmeter comprising a plurality of measurement areas. The Coriolis flowmeter comprises a flow tube and a flow transmitter. The flow tube comprises at least a first measurement area and a second measurement area. A first driving device and a first measurement device are mounted in the first measurement area, and a second driving device and a second measurement device are mounted in the second measurement area. The first measurement device and the second measurement device are both connected to the flow transmitter so as to transmit measurement values of the first measurement device and the second measurement device to the flow transmitter. The first measurement area uses the Coriolis principle to measure at least one of the mass flow and the density of an internal medium, and the second measurement area and the first measurement area both measure the mass flow and / or the density of the internal medium. Compared with the prior art, in the present invention, measurement values of a same parameter of a medium in a flow tube in two measurement areas are compared, so that a measurement result can be verified online, and a high-precision real-time diagnosis method based on sensor design is provided, thereby avoiding production interruption caused by regular calibration of the Coriolis flowmeter.