319results 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 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.

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.

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 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.

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 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 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.

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.

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.

The utility model discloses a capillary tube flow detection device which comprises a gas source connector, a pressure reducing valve, a thermal type gas mass flow meter and a capillary tube connector which are sequentially connected to the outlet end of the gas source connector through a gas conveying pipe in the flowing direction of gas flow, and a controller. The controller is electrically connected with the thermal gas mass flow meter; compared with the prior art, the thermal gas mass flow meter is adopted to detect and collect flow data, on one hand, the thermal gas mass flow meter is small in size, the size of the whole detection device can be reduced, movement of equipment is facilitated, and detection convenience is improved; on the other hand, the test data of the thermal gas mass flow meter is not influenced by the environment temperature and pressure, the consistency of the data can be well kept, and therefore the precision and reliability of data detection are improved.

The invention discloses an online monitoring device for the quantity of slivers removed by a cigarette making machine, which relates to the technical field of tobacco machinery and comprises a sliver collection unit, a data detection unit and a data processing unit. The sliver collecting unit comprises a hopper which is arranged below an outlet of a vibration groove of the cigarette making machine, and the inner wall of the hopper is provided with an inclined stress surface; the data detection unit comprises a force detector arranged below a stress surface, and the force detector is connected with the outer wall of the hopper through a transmission plate; and the data processing unit is electrically connected with the force detector and is used for processing the detection signal and calculating to obtain instantaneous mass flow. In the using process, the free falling body sliver is dynamically metered in an online, real-time and non-contact mode, the technical problem that real-time precise monitoring cannot be achieved through a traditional method is solved, the method has the advantages of being high in measurement precision, high in response speed, good in reliability, easy to integrate and the like, and reliable data support is provided for cigarette production process optimization and quality control.

Methods and systems for managing characterization of wells using data acquisitions tools are disclosed. The data acquisition tools may be positioned in portions of wells. While positioned in the wells, the data acquisition tools may be measured. The measurements may be ingested into models and may provide, as output, inferred conditions in the portions of the wells. The models may be created using simulation systems. The simulation systems may allow for conditions that may be present in wells to be simulated, and data acquisition tools to be exposed to the simulated conditions. While exposed to the simulated conditions, the data acquisition tools may be measured to establish associations that may be used to infer conditions that may be present in wells.

The invention provides a high vacuum flow testing device for an energy-saving pump, and the device comprises a vacuum testing cover, a vacuum pressure gauge, a thermal gas mass flowmeter, a gas inlet pipe, an operation watching mechanism, and a locking mechanism which is used for assisting the position movement of the operation watching mechanism and the fixation after the movement. The bottom end of the vacuum testing cover is provided with a special-shaped connector, the bottom end of the special-shaped connector is provided with an air inlet seat, and the side surface of the top end of the vacuum testing cover is fixedly sleeved with a first limiting ring and a second limiting ring which are arranged in parallel. Sealing rings are arranged at a plurality of key connecting parts of the device, and clean and standard sealing surface treatment is matched, so that external gas leakage interference can be effectively avoided, the stability of a vacuum environment is ensured, the test precision is improved, and the data reliability is guaranteed; the prompt area visually displays operation steps and matters needing attention, and operators can conveniently look up the operation steps and matters at any time.

The invention discloses a flow measurement method and device for hydrogen-containing mixed gas based on thermal conductivity, and belongs to a flow measurement technology for hydrogen-containing mixed gas. According to the method, firstly, zero gas is adopted for calibration and reference so as to obtain hydrogen mass flowmeter data under the condition that hydrogen is not contained, and hydrogen mass flowmeter data under different flows are obtained by adjusting a float flowmeter; then acquiring data under different hydrogen contents and different flows by adopting hydrogen-containing mixed gases with different volumes, a hydrogen float flowmeter and a hydrogen mass flowmeter, synchronously recording gas path temperature and pressure in a measurement process, and fitting to obtain a slope and concentration relationship through volume-mass flow relationship curves of gases with different concentrations; and finally, deducing a volume flow calculation formula of the mixed hydrogen by utilizing the compensated parameters such as the density and the heat conductivity of the mixed gas and combining hydrogen density and mass flow data in a standard state. According to the invention, a reliable calibration basis is provided for the flow measurement of the hydrogen mixed gas.

A system for measuring the difference between a property of a first target and a property of a second target, the system comprising a first member and a second member, wherein the first member comprises a first pattern, and the speed of rotation of the first member is configured to be based on the property of the first target; and the second member comprises a second pattern wherein, the speed of rotation of the second member is configured to be based on the property of the second target, further wherein the first and second pattern are angularly-varying and are configured to generate an interference pattern by their interaction when the first and second members have a relative difference in their rotational speeds, the interference pattern being indicative of the magnitude of this difference.

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.

A method for determining a flux of anode gas from an anode subsystem of a fuel cell system (10), wherein the method comprises: - Defining a time period to determine the flow; - Performing a measurement of the pressure in the anode subsystem at a variety of predetermined time intervals during the time period; - Calculating the slope of a pressure line representing the changes in pressure in the anode subsystem over time using pressure measurements; and - Determining the flux of anode gas from the anode subsystem using the slope of the pressure line, wherein determining the flux of anode gas from the anode subsystem using the slope of the pressure line includes determining whether the pressure line fits a straight line within a predetermined threshold, and if the pressure line fits a straight line within the predetermined threshold, the calculated slope is determined to be valid.

The utility model discloses an X-ray static CT online coal quality detection system, the system comprises an electronic belt scale, a multi-point source light machine, a multilayer detector, a data acquisition card and a computer, the electronic belt scale is installed below a conveyor belt and is used for weighing coal flow on the conveyor belt; the multi-point source light machine emits X-rays to coal flow on the conveying belt on the conveying belt, and the multi-layer detector receives the X-rays penetrating through the coal flow below the conveying belt; the data acquisition card is in communication connection with the electronic belt scale, the multi-point source light machine, the multi-layer detector and the computer and is used for sending data of the electronic belt scale, the multi-point source light machine and the multi-layer detector to the computer; and the computer performs online coal quality detection according to the received data.

Measurement accuracy and control precision can be affected by many factors, including contaminants in the liquid and irregularities in the flow path.SOLUTION: The fluid system includes a capillary tube, first and second temperature sensors, first and second pressure sensors, and a processor coupled to the sensors. The processor is configured to execute instructions to determine an output using the sensor data and using fluid parameter data received via an interface coupled to the processor. The processor is coupled to a controller in fluid communication with the capillary tube.SELECTED DRAWING: Figure 1

Methods and apparatus, such as a controller of a respiratory therapy device, generate a signal representing an estimate of flow rate of gas flow from the device. The respiratory therapy device may include a motor-operated blower. The method may include receiving in the controller, signals generated by a set of sensors, including measures of pressure and frequency (e.g., speed) of the motor. The controller may be configured to compute an entrained air density function and generate the estimate signal based on a function of the measures of pressure and frequency, and the entrained air density function. The entrained air density function may apply signals from additional sensors, such as atmospheric pressure, gas temperature, and ambient relative humidity, to compute atmospheric density. Control operations of the therapy device may then be based on the estimated signal, which may be applied to assess accuracy of a signal from a flow sensor.

The application discloses a device and method for gas-water separation and flow metering under high temperature and high pressure, which comprises a dryer assembly, a high-pressure-resistant container, a pressure gauge and a timer; wherein the dryer assembly is arranged in multiple and is arranged in parallel, the parallel dryer assembly is connected with the high-pressure-resistant container, a drying agent is arranged in the dryer assembly, and the high-pressure-resistant container is provided with the pressure gauge; before gas-water separation, the high-pressure-resistant container is inflated until a preset pressure is reached. The device and method can separate gas and water under high temperature and high pressure and accurately meter the flow of the gas phase and the water phase.

Methods and apparatuses, such as a controller of a respiratory treatment device, generate a signal representing an estimate of flow of air from the device. The respiratory treatment device can include a motor-operated blower. The method can include receiving, in the controller, signals generated by a set of sensors including measurements of pressure and frequency (e.g., speed) of the motor. The controller can be configured to calculate an entrained air density function and generate the estimate signal based on a function of the measurements of pressure and frequency and the entrained air density function. The entrained air density function can apply signals from additional sensors, such as atmospheric pressure, gas temperature, and ambient relative humidity, to calculate air density. Control operations of the treatment device can then be based on the estimated signal, which can be used to estimate accuracy of signals from flow sensors.

To remove the dead volume in the sensor assembly of a mass flow controller.SOLUTION: A sensor assembly 16 of a mass flow controller includes: a first reservoir 22 coupled to a first pressure transducer 18 and communicating with a sampling flow path 64; a second reservoir 24 coupled to a second pressure transducer 20, communicating with the first reservoir 22 via a flow-through path 26, and further communicating with another sampling flow path 66; and a restrictor 68 disposed in the flow-through path 26 so as to face the first and second pressure transducers 18 and 20.SELECTED DRAWING: Figure 2A

The invention belongs to the technical field of metering, and particularly relates to a three-phase online metering device and a metering method. A three-phase on-line metering device comprises a base, two identical metering tanks and a control unit are arranged above the base, liquid inlet valves are connected between the top side faces of the two metering tanks respectively, liquid outlet valves are connected between the bottom side faces of the two metering tanks respectively, the liquid outlet valves are connected with liquid outlet pipelines, water content analyzers are arranged on the liquid outlet pipelines, and gas phase pipelines are arranged at the tops of the metering tanks. A gas phase flowmeter is arranged on the gas phase pipeline, a first pressure transmitter is further arranged on the upper portion of the metering tank, a second pressure transmitter is further arranged on the lower portion of the metering tank, the control unit comprises a PLC and a display screen, and the PLC is electrically connected with the liquid outlet valve, the liquid inlet valve, the first pressure transmitter, the second pressure transmitter, the water content analyzer and the gas phase flowmeter. According to the invention, through alternate continuous measurement of double-tank metering, accurate metering of oil, gas and water in a single-well oil transportation line with small liquid amount, high water content and unstable gas amount is realized.

The present invention provides a power regulation circuit and regulation method, and a constant-power thermal mass flowmeter. The circuit first detects the voltage across a temperature sensor and the voltage across a linear element, then calculates the actual power of the temperature sensor based on the voltage across the temperature sensor and the voltage across the linear element. An intermediate voltage is then determined based on the voltage across the temperature sensor and the voltage across the linear element, and the intermediate voltage is compared with an externally input threshold voltage to determine the current flow state of the intermediate medium and the current power state of the driving power. A driving power is then selected based on the current flow state of the intermediate medium and the current power state of the driving power, and power regulation is performed based on the driving power and the actual power of the temperature sensor, outputting a constant power to the temperature sensor. The present invention can perform power regulation to maintain a constant power level for the temperature sensor and maintain the original reliability of the temperature sensor even at high temperatures.