690results 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.

The present invention provides a low-cost, non-invasive device (100) for measuring flow and leakage detection of fluids within closed conduits. The invention utilizes affordable a Micro-Electro Mechanical System (MEMS) based Inertial Measurement Units (IMUs) sensor (102) in the device to non-invasively measure fluid flow and leakage of fluids which exhibit turbulence or flow-induced-vibrations within a conduit. This device fin directly estimates flow rate or velocity based on the concept of Reynolds number in fluid dynamics. Further, this device is easy to install on pipes of all dimensions, requires minimal calibration, has no moving parts in contact with the fluid, can be integrated with Geographic Information System (GIS) software, and possesses advanced metering infrastructure to support remote reading and automated bill generation.

The invention provides a mass flow meter control method and system, a storage medium and electronic equipment, and relates to the technical field of flow monitoring. According to the technical scheme provided by the invention, the relation comparison table of the environment information and the fluid state information is established by collecting the historical data of the first multiple measurement nodes in the pipeline, and the target gas-liquid proportion is calculated by combining the current environment information and the fluid state information; and then matching the calculated target gas-liquid proportion with a preset gas-liquid proportion interval, selecting a corresponding correction weight, and establishing a corresponding relationship between gas-liquid proportion change and measurement correction. And finally, the correction weight is applied to the adjustment of the initial mass flow data, the influence of the gas-liquid proportion change on the measurement result is effectively compensated by establishing a complete data association and correction mechanism, the limitation of a single working condition calibration or simple compensation mode in the related technology is overcome, the mass flow of the fluid can be accurately measured, and the measurement accuracy is improved. And the measurement precision of the mass flow meter under a complex working condition is obviously improved.

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.

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.

A meter electronics (20) for selecting a measurement correction method is provided. The meter electronics (20) comprises an interface (501) configured to communicatively couple to a sensor assembly (10) and receive sensor signals from the sensor assembly (10) and a processing system (502) communicatively coupled to the interface (501). The processing system (502) is configured to store two or more measurement correction methods, wherein the two or more measurement correction methods compensate for multiphase effects of a multiphase fluid in the sensor assembly, determine one or more process parameter values, and select one of the two or more measurement correction methods based on the one or more process parameter values.

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.

The invention relates to a vibronic module (VM) of a modular measuring system, comprising: - a measuring tube module (MM) having a first and second measuring tube (31, 32); - an exciter magnet (22) on one of the at least two measuring tubes (31, 32), which is configured to cause the measuring tube module (MM) to oscillate when it is exposed to a time-varying magnetic field; - at least one sensor magnet (24) which is at least indirectly connected to one of the at least two measuring tubes (31, 32); - a process connection (PA), which is connected to the measuring tube module (MM), wherein the process connection (PA) comprises an inlet channel (101) for introducing the medium to be measured into the first measuring tube (31), an intermediate channel (103) that connects an outlet (A1) of the first measuring tube (31) to an inlet (E2) of the second measuring tube (32), and an outlet channel (102) for discharging the medium from the vibronic module (VM), wherein the process connection (PA) is formed in several parts and comprises an inlet part (ET) and a main part (HT), wherein the main part (HT) has a first recess (HV1), which together with a first recess (EV1) of the inlet part (ET) forms a partial section of the inlet channel (101), wherein the main part (MT) has a second recess (HV2), which together with a second recess (EV2) of the inlet part (ET) forms a partial section of the intermediate channel (103).

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.

The invention relates to a sensor (10) of a Coriolis meter (1) for measuring the mass flow or the density of a medium flowing through a pipe, said sensor comprising: at least one measuring tube (11) for conducting the medium, each having an inlet (11.1) and an outlet (11.2); at least one exciter (12) for exciting measuring tube oscillations; at least two sensors (13) for detecting measuring tube oscillations; a support body (14) for holding the measuring tube; characterised in that the sensor has an RFID temperature sensor (15) which is designed to determine a temperature of the measuring tube, the sensor having an RF transceiver (16) which is designed to read out the temperature sensor.

The invention relates to a vibronic module (VM) of a modular measuring system, comprising: - a measuring tube module (MM) with a first and second measuring tube (31, 32); - an excitation magnet (22) on one of the at least two measuring tubes (31, 32), which is designed to cause the measuring tube module (MM) to oscillate when it is exposed to a time-varying magnetic field, - at least one sensor magnet (24) is at least indirectly connected to one of the at least two measuring tubes (31, 32), - a process connection (PA) which is connected to the measuring tube module (MM), wherein the process connection (PA) comprises an inlet channel (101) for introducing the measuring medium into the first measuring tube (31), an intermediate channel (103) which connects an outlet (A1) of the first measuring tube (31) to an inlet (E2) of the second measuring tube (32), and an outlet channel (102) for discharging the measuring medium from the vibronic module (VM), wherein the process connection (PA) is designed in several parts and comprises an inlet part (ET) and a main part (HT), wherein the main part (HT) has a first recess (HV1), which together with a first recess (EV1) of the inlet part (ET) forms a partial section of the inlet channel (101), wherein the main part (HT) has a second recess (HV2), which together with a second recess (EV2) of the inlet part (ET) forms a partial section of the intermediate channel (103) form.

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.

Coriolis mass flowmeter and / or density meter (100) comprising: at least two measuring tubes (110) which are bent in the rest position, wherein the measuring tubes (110) have measuring tube center lines which run in pairs mirror-symmetrically to a first mirror plane (Syz) which extends between the measuring tubes (110), wherein the measuring tube center lines each run mirror-symmetrically to a second mirror plane (Sxy) which extends perpendicular to the first mirror plane (Syz); at least one excitation arrangement (140) and at least one sensor arrangement (142); a collector (120) on the inlet side and an outlet side, wherein the measuring tubes (110) are fluidically combined with one of the collectors (120) on the inlet side and the outlet side; a support body (124) which rigidly connects the inlet-side collector (120) and the outlet-side collector (120); and at least one plate-shaped coupler (132, 134) on the inlet side and the outlet side, wherein the measuring tubes (110) are connected to one another in pairs by means of the couplers (132, 134) in order to form an oscillator, wherein the couplers (132, 134) are arranged symmetrically to the first mirror plane (Syz) and in pairs symmetrically to the second mirror plane (Sxy), wherein the excitation arrangement (140) is designed to excite a bending vibration mode between the two measuring tubes (110) of the respective oscillator, wherein the sensor arrangement (142) is adapted to detect oscillations of the respective oscillator, wherein the measuring tube center lines of the measuring tubes (110) of at least one oscillator between the second mirror plane (Sxy) and the collectors (120) each have a first bent section (114), a second bent section (118) and a straight section (116) arranged between the bent sections (114, 118), to which the two bent sections (114, 118) adjoin, wherein the first bent section (114) and the second bent section (118) are bent in opposite directions, wherein the second bent section (118) is arranged on the side of the straight section (116) facing away from the second mirror plane (Sxy), wherein the projection of the measuring tube center line between the intersection point with the second mirror plane (Sxy) and the transition between the straight section (116) and the second bent section (118) onto the second mirror plane (Sxy) Arch height (h) defined,wherein twice the distance between the second mirror plane (Sxy) and the measuring tube center line at the transition between the straight section (116) and the second curved section (118) defines an arc width (w), wherein the quotient of the arc height (h) divided by the arc width (w) defines a relative arc height (h, r ) which is not less than 0.65, where the relative arch height (h r ) is not more than 1.0, wherein the first curved sections (114) between the second mirror plane (Sxy) and the straight section (116) each have a plurality of stiffening bodies (151, 152, 153, 154) which surround the respective measuring tube (110) in a ring shape, wherein at least one of the couplers (132, 134) on the inlet side and the outlet side has a tuning opening surrounded by a closed edge between the measuring tubes (110) connected by the coupler (132, 134) for influencing the oscillation properties of the respective oscillator, wherein the tuning opening in the first mirror plane (Syz) has an extension of at least 70% of the diameter of the measuring tubes (110).

A Coriolis flowmeter (5) is provided, which includes flow conduits (103A, 103B) having a driver (104) and pick-off sensors (105, 105') connected thereto. Meter electronics (20) is configured to drive the driver (104) to vibrate the flow conduits (103A, 103B) and receive signals from the pick-off sensors (105, 105'). The meter electronics (20) acquires the voltages of both pick-off sensors (105, 105') and determines PO RATIO and determines whether PO RATIO is within a predetermined PO LIMIT It is configured to determine whether it is inside. PO RATIO If PO is outside the predetermined PO LIMIT the presence of an external magnetic field is indicated.

The present invention discloses a vibrating tube densitometer for small mass flow measurement, which comprises a housing, a flange, a bracket, a vibrating tube assembly and a wiring sealing structure; the measuring tube includes an input pipeline, an output pipeline, a fluid flow tube, a flow equalizing tube and an accelerating tube, the flow equalizing tube includes a shunt inlet, a shunt outlet and a spiral tube, and a plurality of alternately connected first passages and second passages are arranged inside the accelerating tube. The liquid containing trace gas is first shunted through the flow equalizing tube to form small bubbles. Due to gravity, most of the liquid flows from the lower passage of the first passage to the second passage, and the bubbles in the fluid will float up, and a small part of the bubbles will adhere to the upper wall and stay in the first passage. After the fluid enters the second passage, a small amount of fluid passes through the upper passage of the second passage and causes the floating bubbles to stay. After multiple operations, the gas will not be discharged with the liquid, so that only the liquid part without gas is metered, thereby improving the metering accuracy.

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.

The invention discloses a method and device for mass flow measurement, and the method for mass flow measurement comprises the steps: measuring the temperature of a flow tube of a mass flow meter when the mass flow meter is in a working state; setting a zero point for the mass flow meter based on the temperature measured in the working state; determining one or more temperature interval demarcation points based on the measured temperatures; dividing a plurality of temperature intervals based on the temperature interval demarcation points; setting a small flow cut-off value of the mass flow for each temperature interval in the plurality of temperature intervals; and obtaining the measured mass flow based on the set small flow cut value of the mass flow.