626results about "Indirect mass flowmeters" patented technology

The invention belongs to the technical field of flowmeter verification, and discloses a two-phase flow analysis system and method based on a differential pressure flowmeter and an electromagnetic flowmeter. The method comprises the steps that a differential pressure flow meter and an electromagnetic flow meter are arranged on adjacent sections of a pipeline, the electromagnetic flow meter collects voltage signals and analyzes the voltage signals to obtain liquid phase volume flow, and liquid phase mass flow is obtained by combining temperature correction; the differential pressure flowmeter calculates the gas density by using an ideal gas law according to the temperature and the pressure; inputting multi-sensor time sequence data into the weight optimization model, and optimizing the volume gas content and the total mass flow rate; baseline parameters are calibrated during full-pipe single-phase flow to obtain zero drift, and real-time temperature and pressure dynamic correction are combined, so that the metering precision and the working condition adaptability are improved; the problem of verification deviation of a traditional flowmeter is solved, high precision and high reliability of complex gas-liquid two-phase flow metering are achieved, and efficient and reliable technical support is provided for two-phase flow precise metering and process control in the fields of chemical engineering, energy and the like.

A fluid transfer system component for internally measuring fluid density in real- time. The component may be a flange comprising a base having a first face and a second face, a primary fluid passageway extending through the base from the first face to the second face, a secondary fluid passageway extending through the base from the first face to the second face, and an outside wall, a portion of which is configured to operably engage with a measuring device and comprises a third opening. The primary fluid passageway may have a non-circular cross-section allowing the secondary fluid passageway to be parallel to the primary fluid passageway. The third opening may be in fluid communication with the secondary fluid passageway allowing the measurement device to measure fluid data such as fluid density via the secondary fluid passageway.

The invention provides a flow control method and a mass flow controller, and the method comprises the steps: obtaining the current environment temperature of the mass flow controller, and determining a temperature sensitivity coefficient according to the current environment temperature; a control parameter corresponding to the current environment temperature is obtained according to the temperature sensitivity coefficient and a preset control parameter, and the opening degree of a control valve is adjusted according to the fluid flow value detected by a flow sensor based on the control parameter, so that the fluid flow value approaches the flow set value. The temperature sensitivity coefficient is determined according to the temperature of the current environment where the mass flow controller is located, so that the control parameters in the process of feeding back and adjusting the fluid flow according to the flow set value are changed in real time, and the control valve adjusting quantity change caused by temperature change can be compensated; therefore, the problems of overshoot and delay caused by too large or too small adjusting amount are avoided, the adaptive capacity of the mass flow controller to different environment temperatures is improved, and the precision and stability of the mass flow controller for controlling fluid flow are guaranteed.

A metering method based on gas volume fraction fitting for wet natural gas is provided. The method includes fitting relationships between a gas Froude number and Venturi differential pressure and Venturi pressure loss with known data to obtain a gas Froude number calculation formula; dividing the known data according to a size of the gas Froude number; fitting relationships between a gas volume fraction and the Venturi differential pressure and the Venturi pressure loss in sections to obtain a piecewise gas volume fraction calculation formula under different gas Froude numbers; and acquiring, on the basis of the gas Froude number calculation formula and the piecewise gas volume fraction calculation formula, some necessary real-time data to calculate a real-time flow rate of the wet gas. The method avoids the use of a ray flow meter. The advantages of the method include accurate metering, small errors and no radioactive pollution.

A system comprising one or more processing circuits to detect an operation of a cold planer, receive a plurality of information corresponding to the cold planer, identify a first status of the cold planer, identify a second status of the cold planer, combine a first set of information and a second set of information to create a fused set of information, and generate a mass flow rate of the material on the conveyor belt based on the fused set of information.

Described herein is a modular device for dispensing and / or monitoring dispensing of a lubricant. A first coupling end is attachable to a source of lubrication. A second coupling end is attachable to a lubrication receiver. A control module is arranged between the first coupling end and the second coupling end. The control module includes a flow measuring device in fluid communication between the first end coupling and the second end coupling. The control module is configured to enable and / or monitoring dispensing of the lubricant. The modular device is configured to be operated remotely.

The invention relates to the technical field of two-phase flow mass flow rate measurement, in particular to a gas-solid two-phase flow mass flow rate measurement device and method based on scattered light imaging. The measuring device comprises an orthogonal laser light source module used for outputting two laser beams which are orthogonal to each other and coincide with the cross section and the longitudinal section of a gas-solid two-phase flow field; the different-magnification scattered light capturing module is used for capturing a longitudinal section conventional-resolution image sequence and a longitudinal section high-resolution image sequence of a longitudinal section visual angle illuminated by the laser beam coinciding with the longitudinal section of the gas-solid two-phase flow field; the cross section scattered light capturing module is used for capturing a cross section conventional resolution image sequence of a cross section visual angle illuminated by the laser beam coinciding with the cross section of the gas-solid two-phase flow field; and the image processing module is used for receiving and processing the longitudinal section conventional resolution image sequence, the longitudinal section high resolution image sequence and the cross section conventional resolution image sequence to obtain the solid phase mass flow rate of the gas-solid two-phase flow.

The invention provides an integrated light quantum mixed-phase flow meter and a mixed-phase fluid measurement method, relates to the technical field of industrial mixed-phase fluid measurement, and aims to solve the problem that an existing underwater flow meter is poor in measurement accuracy of a mixed-phase fluid medium in a deep-sea oil and gas well. The integrated light quantum mixed-phase flow meter comprises a flow meter body, a fluid metering channel penetrates through the center of the flow meter body, and the integrated light quantum mixed-phase flow meter is applied to a deep-sea oil-gas well. The flowmeter main body is a sealed cylinder, and two groups of electric connectors are arranged at the top of the flowmeter main body; the fluid metering channel comprises an inlet pipe section and a middle measuring pipe section, and the middle measuring pipe section is provided with an inner throttling body of a spindle structure; a plurality of sets of measuring systems are integrated on the flowmeter main body, and each set of measuring system is arranged between the fluid metering channel and a shell of the flowmeter main body and is used for measuring the flow of each phase medium in the mixed-phase fluid flowing through the inner-section fluid; a sealing partition plate is arranged on the side, away from the fluid metering channel, of each measuring system and used for isolating seawater.

Compositions and methods are provided for a system in which liquid carbon dioxide, or a mixture of liquid and gaseous carbon dioxide, is converted to solid carbon dioxide by exiting an orifice at a sufficient pressure drop, e.g., for delivery of carbon dioxide to a concrete mixture in a mixer.

A flow measurement apparatus can include a main flow passage, a bypass flow passage having an inlet and an outlet connected with the main flow passage, a mass flowmeter connected in the bypass flow passage between the inlet and the outlet, and a flow restrictor connected in the bypass flow passage between the inlet and the outlet. A method can include connecting the flow measurement apparatus, so that a fluid flow in the well also flows through the flow measurement apparatus, and determining at least one rheological parameter of a non-Newtonian fluid, based on an output of the flow measurement apparatus.

The invention provides a micro liquid flow dynamic weighing device. The micro liquid flow dynamic weighing device comprises a flow source, a liquid inlet pipe, a weighing container and a weighing module, the flow source outputs a liquid medium to the weighing container through the liquid inlet pipe; the weighing container is arranged on the weighing module; the device is characterized in that the weighing container is of an inner-outer double-cylinder structure, the liquid inlet pipe end is arranged in an inner cylinder, and the inner cylinder is filled with liquid in advance and is in a full cylinder state; after weighing is started, the flow source outputs a liquid medium to the inner cylinder through the liquid inlet pipe, and preset liquid in the inner cylinder overflows to the outer cylinder; and the weighing module reads the weight of the entering liquid. In the measuring process, the height of the liquid level contacted with the liquid inlet pipe is not changed, so that the influence of buoyancy correction, pressure fluctuation, surface tension change and the like caused by the change of the height of the liquid level is reduced, and the dynamic weighing accuracy is improved.

A mass flow controller and a flow control method therefor. The method comprises: receiving the value of a set flow point (S110); acquiring a measured value of the gas inlet pressure of a mass flow controller under an actual operation condition (S120); and on the basis of a first preset relational expression between the value of the set flow point that is calibrated when the gas inlet pressure is a standard pressure value and a driving parameter of a regulation valve of the mass flow controller, obtaining a standard value of the driving parameter that corresponds to the value of the set flow point, and on the basis of a comparative relationship between the measured value and the standard pressure value, selectively performing pressure compensation on the standard value of the driving parameter to obtain a selective compensation output value of the driving parameter and accordingly control the regulation valve, so as to adjust the opening degree of the regulation valve to an opening degree corresponding to the selective compensation output value of the driving parameter (S130). By using the method, a mass flow controller exhibits high consistency in response time under different set flow points and different gas inlet pressures, and has a fast response speed, thereby improving the control accuracy of the mass flow controller.

A container for pressurized fluid, in particular a gas cylinder, having a given internal volume, having a fluid distribution valve having a member for selecting the flow rate, which can be manipulated by a user, a position sensor configured to detect the position of the member for adjusting flow rate, and an electronic device having a means for measuring pressure and temperature, a microprocessor-based data processing means that are configured to calculate a remaining fluid on the basis of pressure and temperature measurements, of the position of the member for selecting the flow rate and of the internal volume of the container, a timer, and display means for displaying an updated remaining fluid.

A measurement system for determining a physical parameter of a pipe-fluid system includes a pair of confining elements configured to decrease surface vibration deformations at an outer surface of each end of the pipe-fluid system; wherein each confining element comprise a supporting frame configured to be detachably mounted on a pipe of the pipe-fluid system; and a fixation element configured to be detachably mounted for mechanically coupling the supporting frame with an outer surface of the pipe; an excitation system, configured to generate a mechanical vibration spectrum at a surface of the pipe-fluid system; and a vibration measurement device configured to be mechanically coupled to an outer surface of the pipe-fluid system, and configured to provide a mechanical vibration spectrum of the pipe-fluid system.

On board an aircraft, a method is perform in which the following steps are implemented in the following order: measuring a first density value, a first dielectric constant value and a first temperature value of the fuel at a first time, measuring a second density value, a second dielectric constant value and a second temperature value of the fuel, determining parameters of a function for calculating a density from a temperature or a dielectric constant, measuring a volume flow rate value and at least one of a third temperature value and a third dielectric constant value of the fuel in a fuel injection duct in the engine, and determining a density value of the fuel and a mass flow rate of the fuel in the injection line.

Compositions and methods are provided for a system in which liquid carbon dioxide, or a mixture of liquid and gaseous carbon dioxide, is converted to solid carbon dioxide by exiting an orifice at a sufficient pressure drop, e.g., for delivery of carbon dioxide to a concrete mixture in a mixer.

The invention discloses a powder fuel mass flow rate online measuring device and method based on laser modulation, and belongs to the technical field of laser spectrum application. The semiconductor laser and the solid laser are vertically arranged, and a chopper, a first beam splitter, a beam combiner, a second beam splitter and a weak light signal detection system are arranged on a laser transmission path of the semiconductor laser; laser output by the solid laser passes through the structured light modulation and shaping system and then is combined with laser of the semiconductor laser through the beam combiner; the power meter is matched with the first beam splitter; and the high-speed CMOS camera is matched with the second beam splitter. The method comprises the following steps: setting up and debugging the device; optical signal processing; powder fuel particle density and flow velocity are measured synchronously; and calibrating an online measuring device, establishing a calibration relationship between the density and the flow velocity of the powder fuel particles and the mass flow rate, and obtaining instantaneous flow rate information of the powder fuel in real time. According to the invention, the signal-to-noise ratio of the detection signal is improved, and the real-time high-precision measurement of the mass flow rate under the high-speed dense gas-solid two-phase background is realized.

A method for determining an optimal sensor set includes identifying a set of possible faults of a thermal hydraulic system and a set of diagnostic objectives. The method also includes obtaining descriptions of sensor sets, which includes: receiving a first description of a first sensor set, and generating, based on the first description, a second description of a second sensor set. The method further includes, for each sensor set: determining a diagnostic capability of the sensor set, and calculating a score of the particular sensor set based on the particular description and the diagnostic capability, wherein a score of a sensor set is increased by a monetary cost of the sensor set and decreased by the sensor set meeting a diagnostic objective. The method also includes identifying the optimal sensor set that has a lowest score of the sensor sets, and displaying an indication of the optimal sensor set.

A system for measuring the flow rate in a microfluidic pipe having n pressure sensors arranged in series on a pipe and measuring the pressure Pi of the liquid passing through same. These sensors being separated from one another by pipe portions Ri. Each pipe portion having a hydraulic resistance Rhi, thus making it possible to measure the pressure variations or head loss ΔPi between two consecutive sensors of the liquid flowing successively through these hydraulic resistances. The comparison between the estimated flow rates Di=ΔPi / Ri, making it possible to determine the fouling of the microfluidic pipe.

A mass flow meter includes a flow pathway through the mass flow meter, wherein the flow pathway comprises a first cavity and a second cavity. The mass flow meter also includes a laminar flow element adjacent to the first cavity and the second cavity, wherein the first cavity is upstream of the laminar flow element and the second cavity is downstream of the laminar flow element. A pressure transducer is positioned in at least one of the first cavity or the second cavity, wherein the pressure transducer includes at least one diaphragm and measures linear and non-linear responses of the at least one diaphragm to a first pressure to determine a voltage signal indicative of a pressure. The mass flow meter converts the pressure reading obtained from the pressure transducer into a signal indicative of a mass flow rate through the laminar flow element.

The utility model provides a primary air powder concentration measuring device and a heat supply system, and belongs to the technical field of concentration measurement, and the device comprises an electrostatic loading system which is used for carrying out charge loading treatment on electrostatic ions on the surfaces of all pulverized coal particles when a power plant is in a low load state, so that all the electrostatic ions reach a saturated state; each electric charge quantity measuring sensor is used for measuring the total electric charge quantity of the static ions reaching the saturation state; each signal detection sensor is used for detecting charges generated when the static ions reaching the saturation state flow through and generating electric signals; and the controller is used for calculating the pulverized coal mass flow according to the electric signal generated by the signal detection sensor, and calculating the primary pulverized coal concentration in the pulverized coal pipeline according to the total charge quantity of the electrostatic ions and the pulverized coal mass flow. According to the scheme, the primary air powder concentration can be accurately measured under the condition of low load of the power plant.

The invention relates to a method for determining a simulated current mass flow (m_IV), in particular as a substitute for a current mass flow (m_IM) that cannot be measured in a field / production vehicle, in a coolant circuit (10) for heating / cooling a component (20) to be heated / cooled, the method comprising the steps of: receiving pressure data (D_P), wherein the pressure data (D_P) comprise a first pressure (p1) in the coolant circuit (10) and a second pressure (p2) in the coolant circuit (10), wherein the first pressure (p1) is provided from a first pressure-measuring point and the second pressure (p2) is provided from a second pressure-measuring point, or the pressure data (D_P) comprise a pressure differential (Δp) in the coolant circuit (10), wherein the pressure differential (Δp) between the first pressure-measuring point and the second pressure-measuring point is provided; wherein the first pressure-measuring point is upstream of the second pressure-measuring point and wherein the first pressure-measuring point and the second pressure-measuring point are in the same coolant path of the coolant circuit (10); determining the simulated current mass flow (m_IV) of the coolant with the aid of a mathematical model (M) which is suitable for determining the current mass flow based on the pressure data (D_P).

A multi-phase flow metering system has a hardware module for receiving a multi-phase flow comprising a plurality of phases, a measurement module having one or more sensors coupled to the hardware module for measuring data regarding characteristics of the multi-phase flow, a data acquisition (DAQ) module functionally for gathering the measured data from the measurement module, and a processing unit for using an artificial intelligence (AI) model for estimating at least flow rates of the plurality of phases of the multi-phase flow based on the measured data gathered by the DAQ module.

The invention discloses a CEMS-based direct carbon emission monitoring system and method, and the system releases tracer gas at the upstream of a flue gas emission flow through a tracer standard gas unit, collects a flue gas sample through a downstream collection unit, monitors the concentration of the tracer standard gas in the sample through a concentration analysis unit, and combines the flue gas flow obtained by a flow monitoring unit to monitor the concentration of the tracer standard gas in the sample. And calculating a flow control coefficient so as to accurately calculate the carbon dioxide emission. The method is based on a mass flow balance method, the moisture-containing standard gas is creatively used, the concentration of CO2 under the wet flue gas condition can be directly and accurately measured, and the accuracy and efficiency of carbon emission monitoring are improved.

A metering method based on converted slip ratio fitting for wet natural gas is provided. The method includes fitting relationships between a gas Froude number and Venturi differential pressure and Venturi pressure loss with known data to obtain a gas Froude number calculation formula; dividing the known data according to a size of the gas Froude number, and performing piecewise fitting to obtain a piecewise converted slip ratio calculation formula under different gas Froude numbers; performing fitting on the dryness fraction and the converted slip ratio calculation formula; and acquiring, on the basis of the gas Froude number calculation formula, the converted slip ratio calculation formula, an overrated factor calculation formula and a dryness fraction calculation formula, some necessary real-time data to calculate a real-time flow rate of the wet gas. The method avoids using a ray flow meter and has advantages that include accurate metering and no radioactive pollution.

A self-validated mass flow control (MFC) apparatus and a method of providing self-validated mass flow control are provided. The MFC includes a chamber configured to receive a fluid, an upstream valve disposed upstream of the chamber, and a downstream control valve disposed downstream of the chamber. The MFC further includes a pressure drop assembly disposed downstream of the downstream control valve, and first and second pressure sensors. A controller of the MFC is configured to control actuation of the downstream control valve by switching between a flow-based feedback control and a pressure-based feedback control. In the flow-based feedback control, the flow is monitored based on a rate of pressure decay in the chamber detected by the first pressure sensor when the upstream control valve is closed. In pressure-based feedback control, the pressure upstream of the pressure drop assembly detected by the second pressure sensor is monitored.

The invention discloses a measuring device and method for calibrating gas mass flow, and belongs to the technical field of flow measurement. The device comprises a gas inlet pipe provided with a pressure regulating valve; the stagnation container is communicated with the air inlet pipe; the plurality of sonic nozzles are respectively arranged on the stagnation container, and each sonic nozzle is provided with an upstream end communicated with the stagnation container and a downstream end communicated with the collection container; a collection container; the exhaust pipe is communicated with the collecting container; the pressure measuring piece I, the temperature measuring piece I and the humidity measuring piece are connected to the stagnation container; and the second pressure measuring piece is connected to the collection container. The calibration method comprises the following steps: opening the pressure regulating valve and regulating until each sonic nozzle is in a critical flow state; and after the measured data is stable, collecting and calculating the standard flow. According to the gas mass flow metering device, the field gas source can be directly utilized, measurement can be conveniently and rapidly carried out, the field calibration problem of the gas mass flow metering device can be solved, it is guaranteed that the flow value of the gas mass flow metering device is accurate, and meanwhile the gas mass flow metering device can be used under the laboratory condition.

The invention discloses a capacitive sensor, device and method for double-sleeve particle conveying detection, the capacitive flow sensor comprises an outer sleeve, a tubular excitation electrode, a first detection electrode and a second detection electrode, the tubular excitation electrode is arranged on the inner side of the outer sleeve, and the first detection electrode is arranged on the outer sleeve; the tubular excitation electrode is used for being connected with an excitation source to generate an excitation signal; the first detection electrode and the second detection electrode are arranged at different positions in the axial direction of the outer sleeve through an isolating ring; the first detection electrode and the second detection electrode are used for respectively acquiring detection signals of the excitation signals acting on powder particles, so that the special structure of the ash conveying double sleeve can be well adapted, and the technical bottleneck that a traditional sensor cannot be applied to the ash conveying double sleeve is effectively solved; and a solution is provided for accurately measuring the flow in the ash conveying double sleeve.

The invention belongs to the technical field of gas field water flow meter measurement, and particularly discloses a two-phase flow measuring device and method resistant to oil and gas field water corrosion. The device is used for measuring gas field water in a pipeline and is matched with a flow totalizer. Comprising a first differential pressure flowmeter used for measuring the mass flow of gas in a pipeline, a second differential pressure flowmeter used for measuring the mass flow of liquid in the pipeline, a temperature sensor used for measuring the temperature of the gas in the pipeline, and a liquid level differential pressure transmitter used for measuring the liquid level in the pipeline. The temperature sensor, the first differential pressure flow meter, the second differential pressure flow meter and the liquid level differential pressure transmitter are respectively connected with the flow totalizer. According to the invention, the problems of gas and liquid two-phase flow measurement, accurate sulfur-containing gas field water measurement and the like can be solved under the condition that gas field water components contain corrosive (especially sulfur-containing components), non-full pipe flow and liquid phase flow velocity.

A system for removing dead volume in a sensor assembly of a mass flow controller is presented. The system comprises a valve assembly communicable coupled to the sensor assembly. The valve assembly is in fluid communication with fluid in a primary flow path and the sensor assembly is in fluid communication with fluid in the primary flow path. The sensor assembly comprises a pressure transducer having a first reservoir and another pressure transducer having a second reservoir. The first reservoir has a port in fluid communication with fluid in a sampled flow path. The second reservoir is coupled to a second pressure transducer and is fluidly coupled to the first reservoir through a flow through path. The second reservoir also includes another port for communicating the flow of fluid from the flow through path to another flow path. A flow rate restrictor is disposed in the flow through path.