458results 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.

A method for determining variables influencing a total zero point error of a Coriolis mass flow meter comprises: exciting a vibration of a bending vibration mode; measuring a first total zero point error T at a flow of zero; ascertaining a first damping value D of the vibration of the bending vibration mode; measuring an exciter-independent zero point error I during a decaying vibration of the bending vibration mode at a flow of zero; ascertaining a first exciter-dependent contribution E to the first total zero point error T based on the first total zero point error T and based on the exciter-independent zero point error I; and ascertaining a sensitivity factor S for the bending vibration mode based on the first exciter-dependent contribution E to the total zero point error T and based on the first damping value D.

The invention relates to the technical field of grouting engineering, in particular to a hidden engineering grouting engineering quantity metering system and method based on the Internet of Things, the system is composed of a flow measuring device, an Internet of Things transmission module and an intelligent construction site platform, and data collected by the flow measuring device is uploaded to the intelligent construction site platform through the Internet of Things transmission module; the Coriolis flowmeter tool is matched with other fixing structures, a flow measuring device and a grouting opening can be fixed, meanwhile, the Internet of Things and an intelligent construction site platform are fused, a grouting amount dynamic calculation model is constructed, real-time data verification and error correction are supported, video monitoring and data warning functions are integrated in a hidden engineering special module, and the construction efficiency is improved. And full-life-cycle management and control of the grouting process are realized.

The invention relates to a Coriolis flow measuring device (1) for determining a mass flow rate, a medium density and / or a medium viscosity of a fluid measurement medium, in particular a liquid, in a process line, comprising:-a measuring system (10), the measuring system (10) having a measuring line (11) for conveying the measurement medium, the measuring line (11) being arranged in the process line (11); the measuring system (10) has at least one measuring tube (12); -a calibration system (20), the calibration system (20) having a calibration line (21), separate from the measuring line (11), for conveying a calibration medium, the calibration system (20) comprising at least one calibration tube (22); -a (combined) exciter system (30) for exciting mechanical oscillations of both the measurement system and the calibration system; -a (combined) sensor system (40) for detecting mechanical oscillations of both the measurement system and the calibration system, in which the exciter system (30) and the sensor system (40) are each connected, in particular in a detachable manner, to the measurement system (10) and to the calibration system (20), in particular to the measurement system (10) and the calibration system (20). The exciter system (30) and the sensor system (40) are preferably detachably connected to the measurement system (10) and the calibration system (20); and measurement and calibration electronics (50), where the measurement and calibration electronics (50) are electrically connected to both the exciter system (30) and the sensor system (40) and are configured to oscillate both the measurement tube (12) and the calibration tube (22) by means of the exciter system (30) and to determine oscillations of the measurement tube (12) and the calibration tube (22) by means of the sensor system (40), where the measurement and calibration electronics (50) are electrically connected to both the exciter system (30) and the sensor system (40). The measurement and calibration electronics (50) are configured to determine at least one calibration variable of an integral system formed by the measurement system (10) and the calibration system (20), based on oscillations of both the measurement system (10) and the calibration system (20) conveying the calibration medium, as determined by the sensor system (40), and wherein the measurement system (10) and the calibration system (20) are coupled to the sensor system (40), the measurement and calibration electronics (50) are configured to determine a mass flow rate, a medium density and / or a medium viscosity of a measurement medium conveyed in the measurement system (10) as a function of at least one calibration variable and / or a variable derived therefrom.

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.

The invention relates to a modular Coriolis flow meter (1) for determining a process variable of a flowable medium, comprising: a measuring tube module (M1), the invention relates to a device for measuring a medium, comprising: a measuring tube (3a, 3b), in particular a metal, for conducting the medium, a main exciter assembly (23) arranged on the measuring tube (3a, 3b), a main sensor assembly (24a, 24b) arranged on the measuring tube (3a, 3b), and a measuring tube module identifier (28) having identification information; -a carrier module (M2) comprising: a container (11) in which the carrier module (M2) is arranged; measuring tube module (M1) can be arranged in a mechanically fixed manner in a first installation position or a second installation position in a releasable connection and can also be released again, or measuring tube module (M1) can be arranged in a mechanically fixed manner in a first installation position or a second installation position in a releasable connection and can also be released again the second mounting position is different from the first mounting position; an electronics chamber (30) in which evaluation electronics (ME) for determining a process variable are arranged; a secondary exciter assembly (13) that supplements the primary exciter assembly (23); and a secondary sensor assembly (14) that supplements the primary sensor assembly (24); an installation position identification device (19) configured to identify the measuring tube module identifier (28) in order to determine the identification information and to ascertain the current installation position on the basis thereof, the evaluation electronics (ME) being configured to determine the process variable depending on the identified current installation position.

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.

A measuring system includes a vibration-type transducer and electrically coupled measuring system electronics unit for controlling the transducer and evaluating vibration measurement signals provided by the transducer. The exciter arrangement has a vibration exciter which is positioned and aligned such that a drive offset is no more than 0.5% of the tube length. The measuring system electronics are configured to supply electrical power to the vibration exciter by means of an electrical drive signal having a temporally variable electrical current and to provide the drive signal at least intermittently with a sinusoidal second useful current having a second AC frequency, in order to monitor a quality of the measured substance based upon a corresponding second useful signal component of at least one of the vibration measurement signals.

The invention discloses a Coriolis flowmeter signal processing method based on adaptive unscented Kalman filter (UKF) and sliding discrete time Fourier transform (SDTFT), and belongs to the field of Coriolis flowmeter signal processing. The method comprises the following steps: firstly, preprocessing a signal by using a band-pass filter; secondly, extracting a signal frequency by adopting zero-cross detection; furthermore, the frequency obtained by zero-cross detection is taken as the reference frequency, and the phase difference of the two paths of signals is extracted in real time by adopting an SDTFT algorithm considering negative frequency correction; and finally, introducing an adaptive process noise covariance adjustment mechanism based on a phase difference change rate, and constructing an adaptive UKF to carry out error correction on the frequency and the phase difference. According to the invention, the accuracy and real-time performance of signal processing of the Coriolis flowmeter under the conditions of strong interference and sudden phase change can be improved.

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.

The utility model provides a mass flow meter which comprises a housing and a flow meter body arranged in the housing, and two groups of pipelines which are connected with the flow meter body and used for liquid inlet and outlet are fixed on the housing through a thermal bridge structure; the heat bridge structure seals the space between the outer wall of the pipeline and the housing, and the heat bridge structure extends in a reciprocating mode in the axial direction of the pipeline so as to prolong a heat transfer path between the pipeline and the housing; according to the mass flow meter, the thermal bridge structure is connected between the outer wall of the pipeline and the housing in a sealed mode, and the pipeline in the housing and the flow meter body can be isolated from the external environment; besides, the heat bridge structure extends in a reciprocating mode in the axial direction of the pipeline, a heat transfer path between the housing and the pipeline can be increased, the phenomenon that low-temperature liquid in the pipeline is gasified due to heat transferred by the housing can be reduced, and the measuring precision of the flowmeter is improved; and meanwhile, the frosting of the housing can be reduced.

The utility model belongs to the field of metering, and relates to a single-tube self-vibration type Coriolis flowmeter which comprises a shell, a measuring tube, a vibration swing arm and a measuring assembly. The measuring tube is arranged in the shell; the vibration swing arm is arranged on the measuring tube and synchronously vibrates along with the measuring tube; the measuring assembly is arranged in the shell and measures the amplitude of the vibration swing arm. The utility model provides the single-tube self-vibrating Coriolis flowmeter which is low in pipeline stress deformation and high in measurement precision.

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.

A meter electronics (20) for detecting an orientation and compensating a measurement based on the detected orientation is provided. The meter electronics (20) comprises an interface (401) configured to communicatively couple to a sensor assembly (10) and a processing system (402). The processing system (402) is configured to detect an orientation of the sensor assembly (10) based on one or more sensor signals provided by the sensor assembly (10).

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 linear excitation for a Coriolis mass flow meter. The invention relates to an excitation device for exciting oscillations, comprising: a fixable part; a movable portion configured to move relative to the fixable portion; a connection portion, wherein the movable portion is connected to the fixable portion via the connection portion; a piezoelectric element fixedly mounted to the fixable portion; and a connecting element mechanically connecting the piezoelectric element and the movable part. Furthermore, a Coriolis flow meter is disclosed, the Coriolis flow meter comprising: a measuring tube; at least one sensor configured to detect a movement of the measurement tube; and an excitation device configured to excite oscillation of the measuring tube.

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.

The invention discloses a signal processing method, module and control system for a Coriolis flowmeter, and the signal processing method comprises the steps: initializing a group of whale individuals, and the positions of the whale individuals comprise a proportionality coefficient and an integral coefficient which are randomly selected in a preset range; and constructing a target fitness function. And iteratively updating the position of the whale individual based on the whale algorithm by taking the minimum fitness value as a target. And after iteration is completed, selecting the position of the whale individual with the minimum fitness value as an optimal coefficient and outputting the optimal coefficient. Based on the signal processing method, the module and the control system for the Coriolis flowmeter, the vibration amplitude control of the Coriolis flowmeter is effectively optimized, the deviation of the signal is reduced, the accuracy of the signal is improved and the measurement precision of the mass flow rate is further improved by adopting the self-adaptive adjustment and PI control strategy based on the whale algorithm.