449results 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.

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.

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 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.

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.

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.

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.

The present invention relates to the technical field of grain flow monitoring, and provides a grain flow monitoring device and a measuring method. The grain flow monitoring device comprises: a shell, a weighing sensor and a measuring support plate; a flow channel for grain flow is formed in the shell; the flow channel has a buffer section and a measuring section that are interconnected, the measuring section is inclined relative to the horizontal direction, the inlet of the buffer section is used to communicate with the discharge port of the elevator, and the inlet axis of the buffer section is parallel to the axis of the discharge port of the elevator; the first end of the weighing sensor is fixedly connected to the bottom surface of the buffer section, and the second end of the weighing sensor is fixedly connected to the bottom surface of the measuring support plate; the bottom surface of the measuring section is provided with a notch, the measuring support plate is arranged at the notch, and the top surface of the measuring support plate is coplanar with the bottom surface of the buffer section. The present invention reduces the flow rate of the grain through the buffer section and then smoothly enters the measuring section, reduces the interference of unstable factors such as splashing and bumping, and improves the accuracy and reliability of the measurement.

A fluid flows through a flowmeter system including a first conduit, a U-bend, and a second conduit. Various differential pressures of the fluid flowing through the flowmeter system are measured. The differential pressures of the fluid are measured by various pressure sensors (for example, differential pressure sensors) installed on the flowmeter system. Rheology of the fluid is characterized by performing calculations using the measured differential pressures of the fluid and relative positions of the pressure sensors throughout the flowmeter system.

The present invention discloses a thermal mass flowmeter probe, which includes a hollow outer shell, a heating element with temperature detection function and a temperature detection element; the heating element is arranged at the lower end inside the outer shell, and its lower end face is in the same plane as the lower end face of the outer shell and is axially perpendicular to the outer shell; the temperature detection element is arranged inside the outer shell and is thermally isolated from the heating element. Compared with the prior art, the heating element in the thermal mass flowmeter probe of the present invention is arranged at the lower end inside the outer shell and the lower end face is axially perpendicular to the connecting shaft of the thermal mass flowmeter. Therefore, while the heating element is well protected, it can also have good thermal contact with the fluid, thereby improving the measurement accuracy of the thermal mass flowmeter probe. In addition, the heating element and the temperature detection element are thermally isolated, reducing the influence of the heating element on the temperature detection element, making the measurement of the fluid temperature more accurate, and thus the flow measurement more accurate.

The invention discloses a scraper conveyor coal flow and coal quantity detection method based on a composite intelligent camera, and relates to the technical field of coal mining, and the coal flow and coal quantity detection method comprises the steps of equipment installation and calibration, image acquisition and processing, coal flow feature extraction, coal quantity calculation and result output, result verification and algorithm optimization. The coal flow quantity monitoring system has the advantages that comprehensive, real-time and intelligent monitoring of the coal flow quantity of the scraper conveyor is realized by integrating the composite intelligent camera, the light supplementing lamp, the illumination intensity sensor and the coal quality detection means, the coal quality change can be found in time by detecting the coal quality every other week, the coal density is re-evaluated according to the change, and the coal flow quantity can be accurately detected. According to the comprehensive intelligent monitoring and coal quality adaptability optimization strategy, the coal quantity detection precision is improved, the adaptability and reliability of the system are enhanced, and more accurate data support is provided for coal mine production.

Mass flow controller (MFC) devices capable of self-verification and methods of providing for self-verifying mass flow control are provided. An 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 element 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 toggling between flow-based feedback control and pressure-based feedback control. In flow-based feedback control, a flow is monitored based on a rate of decay of pressure in the chamber as detected by the first pressure sensor upon closure of the upstream control valve. In pressure-based feedback control, a pressure upstream of the pressure drop element, as detected by the second pressure sensor, is monitored.

Mass flow control (MFC) devices capable of reporting inlet pressure and methods of reporting inlet pressure are provided. A mass flow controller (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 sensor that detects fluid pressure in the chamber. The MFC further includes a controller configured to control actuation of the upstream valve. The controller is configured to toggle between two modes of reporting a measured inlet pressure. In a first mode, the controller reports a measured inlet pressure based on a reading from the pressure sensor and storing the reading to a buffer when the upstream valve is open. In a second mode, the controller reports the measured inlet pressure based on the reading stored to the buffer when the upstream valve is closed.

The present disclosure provides systems and methods for determining, in real-time, emissions savings. The systems and methods are configured to determine emissions savings achieved by converting natural gas-powered pneumatic control systems to compressed instrument air systems. An amount of methane and / or carbon emissions savings is determined by calculating, in real-time, the amount of compressed air used by a pneumatic system and converting the amount of compressed air into an equivalent amount of methane and / or carbon emissions that would have been emitted into the atmosphere had the pneumatic system been operated by natural gas and / or electric power.

Mass flow control (MFC) devices capable of reporting inlet pressure and methods of reporting inlet pressure are provided. A mass flow controller (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 sensor that detects fluid pressure in the chamber. The MFC further includes a controller configured to control actuation of the upstream valve. The controller is configured to toggle between two modes of reporting a measured inlet pressure. In a first mode, the controller reports a measured inlet pressure based on a reading from the pressure sensor and storing the reading to a buffer when the upstream valve is open. In a second mode, the controller reports the measured inlet pressure based on the reading stored to the buffer when the upstream valve is closed.

The invention relates to the technical field of fluid flow, particle concentration and size testing, and provides a power system flow state measuring method, and a measuring device comprises a metering pipe body, a cylindrical streaming piece, a protective shell and a processing terminal; the cylindrical flow-around piece is arranged in the metering pipe body; the protective shell is arranged on the outer wall surface of the metering pipe body, the pressure sensor and the frequency sensor are arranged in the protective shell, and the detection end of the frequency sensor is located at the downstream of the cylindrical streaming piece; the pressure sensor and the frequency sensor are electrically connected with the processing terminal; a skin part is arranged on the cylinder surface of the cylindrical streaming piece in the incoming flow direction, a plurality of sensing units used for sensing the impact force of the fixed particles are uniformly arranged on the skin part, and the skin part is electrically connected with the pressure sensor. The impact times and average impact force of the particles in the medium to be measured are measured through the skin part and the pressure sensing part, and the concentration and the size of the particles in the medium to be measured are effectively measured in cooperation with data measured by the frequency sensor.