205results about "Indirect mass flowmeters" patented technology

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.

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 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.

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 application discloses a kind of power-based air compressor flow measurement method and measuring device, the power-based flow calculation formula of the present application replaces measuring device to obtain air compressor operating flow, improves the measurement accuracy, effectively reduces the measurement cost, avoids the problems such as high installation and use condition requirement, large measurement error and additional pressure loss when using differential pressure flow measuring device;And can efficiently and quickly obtain air compressor operating flow, when operating condition changes, still can obtain flow result at any time, eliminates the debugging adaptation process of flow measurement device, and the measurement result is more accurate.

A method for monitoring a gas system comprises determining a fuel mass flow rate requirement of a consumer system (e.g., fuel cell system comprising a fuel cell assembly), closing a first valve device in order to interrupt a gas feed from a tank into a high-pressure pipe system connecting the tank to the consumer system, capturing a pressure curve in the high-pressure pipe system while the first valve device is closed, in particular by means of a pressure sensor, determining a theoretical actual mass flow rate in the high-pressure pipe system on the basis of the captured pressure curve, comparing the theoretical actual mass flow rate in the high-pressure pipe system with the determined fuel mass flow rate requirement of the consumer system, and generating an error signal by means of a control device if the theoretical actual mass flow rate deviates from the fuel mass flow rate requirement by more than a threshold value.

The invention discloses a dynamic material flow monitoring method and system for cut tobaccos, and the method comprises the steps: uniformly arranging measuring electrodes on the inner wall of a cut tobacco conveying pipeline for secondary winnowing, so as to construct an electrode array for electrostatic charge detection; forming a polar plate corresponding to the capacitor by the measuring electrode and a set shielding electrode; the capacitance value of the capacitor is obtained through the electrostatic charges of the pipe wall, and the capacitance value correspondingly changes along with the distribution concentration of tobacco shreds in the tobacco shred conveying pipeline; obtaining the capacitance value change of the capacitor in real time, and obtaining a distribution image of tobacco shreds in the tobacco shred conveying pipeline by using an image reconstruction algorithm; and calculating the volume ratio of the tobacco shreds according to the distribution image, and further calculating the tobacco shred flow and the tobacco shred blanking mass according to the volume ratio and the tobacco shred flow velocity. According to the invention, the accuracy and convenience of dynamic flow monitoring of the secondary winnowing tobacco shreds can be improved.

The invention discloses an oil-gas-water mixed transportation metering device which comprises a main mounting pipe, one end of the main mounting pipe is provided with a first flow guide cover through a bolt, the input end of the first flow guide cover is communicated with an input pipe, and the other end of the input pipe is provided with a straight pipe type Coriolis mass flow meter through a bolt. The input end of the straight pipe type Coriolis mass flowmeter is communicated with a communicating pipe; liquid flows in the main installation pipe, the fluid model is calculated and measured through a plurality of optical measurement sensors with contrast light and without contrast light sources in the first installation pipe, and light diffraction, reflection and other conditions are collected through a transparent window of an embedded quartz window. The total mass flow rate and the branch mass flow rate are respectively measured by matching with system calculation integration, the overall accuracy is improved, the structural size is small, the application range is wide, use in various scenes is facilitated, and the overall use effect is improved.

The utility model discloses a directional wind and snow flow collecting device which comprises a plurality of stacked snow storage boxes. A snow inlet box is arranged on one side of each snow storage box; the snow inlet box is communicated with the corresponding snow storage box; the snow storage box and the snow inlet box are connected through a clamping mechanism; the upper and lower adjacent snow storage boxes are connected through a plug-in mechanism; an air inlet is formed in one side of each snow inlet box, and an air discharging opening is formed in the other side of each snow inlet box. The wind and snow flow in the range of 0-1m or higher can be collected, and the wind and snow flow distribution along the height can be measured; the collecting device is divided into the snow inlet boxes and the snow storage boxes, the snow inlet boxes and the snow storage boxes on the lower three layers are slightly larger due to the fact that the snow flow on the lower portion is large, the snow storage boxes on the upper portion are relatively slightly smaller, and the snow flow on the four uppermost layers is small, and the snow storage boxes are also small. The snow inlet box and the snow storage box which are different in size and specification are adopted, specific samples of the wind and snow flows at different positions can be obtained, and therefore the distribution characteristics of the wind and snow flows are analyzed, and the defects in the aspect of scientific research are overcome.

A computer-implemented method for determining a mass flow rate (m) is provided. Verd ) of a gas flowing through a compression system (1) of a fuel cell (2) of a motor vehicle (100). The method comprises providing (S1) a drive power (P EM,Ab ) of an electric machine (12) of the compaction system (1); a determination (S2) of a compaction power (P Verd ), with which the compression system (1) compresses the gas, based on the output power (P EM,Ab ) using a first calculation model (200); and a determination (S3) of the mass flow rate (m Verd ) based on the compaction power (P Verd ) using a second calculation model (300).

A measuring device for metering a fluid. The measuring device includes a container with the fluid, a fluid inlet which is fluidically connected to the container, a fluid outlet which is fluidically connectable with a metering point, a metering line which connects the fluid inlet with the fluid outlet, a delivery pump arranged in the metering line, a density sensor arranged in the metering line, a flow meter arranged in the metering line, and a recirculation line which is arranged to branch off from the metering line downstream of the flow meter and to open into the container. The flow meter is arranged in a measuring unit housing which is arranged at a distance from a pump unit housing in which at least the delivery pump is arranged. The pump unit housing is detachably connected to the measuring unit housing via a connection portion of the metering line.

A method and apparatus (e.g., a controller of a respiratory treatment device) generates a signal indicative of an estimate of a gas flow rate from the device. The respiratory treatment device may include a motor-operated blower. The method may include receiving at the controller signals generated by a set of sensors, including pressure and frequency measurements (e.g., speed) of the motor. The controller may be configured to calculate an entrained air density function and generate the estimated signal based on a function of the pressure and frequency measurements and the entrained air density function. The entrained air density function may apply signals from additional sensors (e.g., ambient pressure, gas temperature, and ambient relative humidity) to calculate air density. Control action of the treatment device may then be based on the estimated signal, which may be applied to assess the accuracy of signals from flow sensors.

A method includes insonifying, using at least one transducer, a vessel using first ultrasound energy of a first frequency, receiving, using the at least one transducer, a first analogue signal obtained using the first ultrasound energy, determining, using processing circuitry, a first material property of the vessel based on a first frequency response signature of the first analogue signal, insonifying, using the at least one transducer, a fluid in the vessel using second ultrasound energy of a second frequency lower than the first frequency, the second ultrasound energy creating cavitation of bubbles in the fluid to be measured, receiving a second analogue signal obtained using the second ultrasound energy and energy created by the cavitation of the bubbles in the fluid, and identifying a second material property of the fluid based on the first material property and a second frequency response signature of the second analogue signal.

Embodiments of the present invention disclose a method and apparatus for determining a parameter relationship of a control valve, a device, a system and a medium. The method comprises: determining an actual value of a mechanical structure parameter and an actual value of a controlled pressure difference parameter of a pressure independent control valve; inputting the actual value of the mechanical structure parameter and the actual value of the controlled pressure difference parameter into a calibration model, the calibration model being adapted to determine a correlation between a flow rate parameter and a pressure difference parameter of the pressure independent control valve on the basis of the mechanical structure parameter and the controlled pressure difference parameter; and receiving the correlation between the flow rate parameter and the pressure difference parameter from the calibration model. The correlation between the flow rate parameter and the pressure difference parameter of the pressure independent control valve is determined by using a variety of models such as an artificial intelligence model, so that the soft sensing and precise control of the flow rate can be achieved without installing a flow meter, thereby reducing equipment costs and installation expenses. Moreover, lightweight processing is performed on a flow model to facilitate on-site deployment and application.

The invention discloses a throat-adjustable gas-liquid flow metering device and a use method. The throat-adjustable gas-liquid flow metering device comprises a throttling device, a data processing system, a differential pressure sensor, a pressure guide pipe, a pressure sensor, an upstream pipeline, a temperature sensor, a downstream pipeline and a data acquisition system. Wherein the throat diameter and length of the throttling device can be adjusted, the throttling principle and a deep neural network model are combined, throat structures at different angles are switched through an adjusting hand wheel, pressure, temperature and differential pressure information of different throat structure combinations is obtained, differential pressure signals and the square root ratio of gas-liquid phase density are substituted into a pre-trained prediction model, and a prediction result is obtained. And outputting a prediction result under each throat structure combination so as to realize the measurement of the mass gas content and the total mass flow of the two-phase flow. The measuring range is widened through the variable throat structure combination, the flow measurement precision is improved based on multi-throat combination data fusion, fluid conveying does not need to be interrupted in the flow measurement process, equipment investment is effectively reduced, and wide application prospects are achieved.

The invention discloses a micro-positive pressure anti-explosion flow transmitter and a flow detection method, and relates to the technical field of anti-explosion flow transmitters. The transmitter consists of an upper part, a middle part and a lower part, wherein the lower part comprises a three-way base, a thermal mass flow chip (sealed by ceramic and encapsulated by epoxy resin) and a shell joint cover; the middle part comprises a PCB (integrated operational amplification and signal conversion circuit) in an explosion-proof cavity and a shell cylinder; and the upper part comprises a cable and a brass nickel-plated explosion-proof stuffing box. According to the detection method, based on the thermal mass flow chip, the constant temperature difference principle and the Min's law (P / deltaT = K1 + K2f (qm) K3), the micro-positive pressure (50-500 Pa) gas flow is calculated by detecting the temperature difference and heating current change when gas flows through the chip, a 4-20 mA signal is output to the positive pressure controller, and flow monitoring, gas replacement judgment and fault alarm are achieved. The problem that an existing transmitter cannot detect micro-positive pressure gas is solved, the explosion-proof performance is excellent, and the transmitter can directly work in a dangerous area.

A method of quantifying emissions concentrations emitted from a gas source via a flow path at which a sensor assembly is arranged, the method comprising: obtaining temperature data and pressure data corresponding to a gas emitted by the gas source, obtaining indicia of whether there has been a barometric change at either the gas source or the sensor assembly, adjusting, if there is a barometric change, the pressure data to account for the barometric change, and determining a flow rate of gas emitted by the gas source, a proportion of an emissions present in the gas emitted from the gas source, and a flow rate or volume of the emissions being released based on the pressure data and the temperature data.

The invention relates to the technical field of geothermal energy, discloses a geothermal two-phase flow field measurement method and system based on a tracer agent, and aims at solving the problems that an existing measurement technology is inaccurate, complex and high in cost. The method comprises the steps that a tracer injection subsystem is installed on the upstream of a pipeline, and a sampling subsystem is arranged on a downstream stable turbulence section; after the pipeline is purged and the background value is measured, liquid-phase and gas-phase tracers are injected synchronously; after the sampling section is stably covered by the tracer agent, separating and collecting a gas-liquid sample, and detecting the concentration on site; the net concentration is calculated by combining the background value, the gas-liquid mass flow is calculated according to whether the cross-phase distribution condition exists or not, and the distribution coefficient is corrected by adopting a self-adaptive algorithm during cross-phase distribution. The system comprises an injection subsystem and a sampling subsystem, the injection subsystem comprises double conveying branches, a mixing assembly and an injection probe, and the sampling subsystem comprises a sampling probe and a gas-liquid separator. The device does not need to separate fluid, can be quickly deployed on site, is accurate in measurement, low in cost and environment-friendly, and adapts to complex geothermal working conditions.