72results about "Volume flow measuring devices" patented technology

The application discloses a vortex frequency extraction and moisture phase separation flow measurement method combined with disturbance wave frequency characteristics, including a conductance ring sensor and a vortex flowmeter, comprising: a pressure sensor, a conductance ring sensor, a vortex flowmeter, a temperature sensor, an excitation electrode, a measurement electrode, a vortex generator, a piezoelectric probe, temperature, pressure and vortex signals s(t) are collected by a collection card, liquid film fluctuation signals δ(t) are collected by a high-speed AD-DA module and an FPGA, the conductance ring sensor 2 is used for dynamically monitoring the change of the liquid film thickness of the pipe wall, and then the fluctuation frequency, i.e., the disturbance wave frequency, is extracted, the vortex flowmeter is used for dynamically monitoring the vortex frequency, the relationship between the disturbance wave frequency characteristics and the vortex stability is utilized, and the extraction precision of the moisture two-phase vortex characteristic frequency is improved. The application utilizes liquid film fluctuation frequency information to extract the vortex frequency and correct over-reading, does not need to calibrate the liquid film thickness, has low requirements on the medium conductivity, and has a wide range of measurement medium.

A flow sensor configured to sense a flow rate of a fluid. The flow sensor includes a first nozzle and a second nozzle. The first nozzle is configured to receive a first portion of a fluid flowing within a flow path and develop a first differential pressure. The second nozzle is configured to receive a second portion of the fluid flowing within the flow path and develop a second differential pressure. Control circuitry is configured to determine the flow rate using at least one of the first differential or the second differential pressure.

The invention discloses a municipal pipe network inflow detection method and device, and relates to the field of municipal pipe network devices. A municipal pipe network inflow detection method comprises the steps that firstly, flow limiters are installed in an upstream pipe network and a downstream pipe network of a municipal pipe network, and at the moment, water in the municipal pipe network flows through the flow limiters; 2, electrifying and starting a current limiter; 3, detecting the liquid flow of an inlet and an outlet in the pipe network through a flow limiter, and recording data of a sunny day and a rainy day respectively; 4, according to the liquid level values of the inlet and the outlet of the flow limiter in the to-be-monitored pipe network in the sunny day, calculating the liquid level difference of the structure of the flow limiter in the to-be-monitored pipe network in the sunny day; impurities accumulated at the bottom of the flow limiter are effectively removed by expanding the settled impurities through the expansion air bag, directionally blowing through the air injection plate and cooperating with filter screen interception and knocking cleaning, the problem that liquid flowing is affected by impurity blockage is avoided, the liquid level detection stability is guaranteed, and manual regular cleaning is not needed.

A fluid measurement system is configured to measure fluid consumption of a vehicle. The fluid measurement system includes a housing coupled to the vehicle and including a supply inlet, a supply outlet, a return inlet, and a return outlet. The system includes a flow rate measurement module having a plurality of flow meters disposed within the housing, including a supply flow meter configured to measure a supply flow rate and disposed between the supply inlet and the supply outlet; and a return flow meter configured to measure a return flow rate and disposed between the return inlet and the return outlet; and a processor configured to calculate, based on the supply flow rate and the return flow rate, a fluid consumption rate, and transmit the fluid consumption rate.

This invention provides flow path sensing for a flow therapy device, which includes a sensing chamber for measuring the flow rate of gas supplied to a patient. The sensing chamber may be located after a blower and / or a mixer. The sensing chamber may include an ultrasonic transducer, a temperature sensor, a heated temperature sensing element, and / or a gas concentration sensor. The gas flow path used in conjunction with the sensor system prevents the generation of undesirable vortices in the gas flow that could cause anomalies in flow measurement.

The application discloses a kind of hydropower station multi-point water taking measurement systems, it is related to hydropower station water taking measurement and hydraulic transient signal processing technical field, to each water taking branch according to round to exert codebook micro water hammer excitation carrying water taking branch identification and round identification and output reference template, obtains transient observation signal in pre-set observation position and obtains candidate event based on reference template and outputs verification pass event and verification fail event;Impulse response is updated in calibration window and generates water taking branch uncertainty index;Verification pass event generates physical consistency token quantity and generates write budget;Calculate congestion risk index and generate event priority and only allow to write minimum event frame in conservative mode;Virtual continuous page type real extraction buffer pool unit executes page type real extraction mapping to form writable window;Event frame settlement unit generates event frame;Measurement calculation and output unit outputs water taking branch instantaneous flow, water taking branch water taking and measurement confidence index.

The invention relates to a device (1) comprising: a pipe (10); a Coriolis mass flowmeter (20) for measuring the mass flow of a medium flowing through the pipe; wherein a first pressure sensor (31) is attached in or on an inlet side portion of the pipe and a second pressure sensor (32) is attached in or on an outlet side portion of the pipe, and / or wherein a pressure difference sensor (33) is configured to detect a pressure difference between the inlet side portion of the pipe and the outlet side portion of the pipe, wherein the pressure sensors and / or the pressure difference sensor are configured to measure the medium pressure and to determine for each determination of the pressure difference a volume flow rate of the medium through the pipe; wherein a first monitoring sensor (41) is attached in or on the inlet side portion of the pipe and a second monitoring sensor (42) is attached in or on the outlet side portion of the pipe, wherein the monitoring sensors are configured to monitor a measurement variable different from the medium pressure in order to identify a static medium state.

A gas-liquid two-phase mass flow metering device based on critical flow mainly comprises an inlet straight pipe, a reducing pipe, a throat pipe, an expansion pipe, an outlet straight pipe, a temperature sensor, a pressure sensor, a differential pressure sensor, an ultrasonic transmitting probe, an ultrasonic receiving probe and the like. A swirler is arranged in the inlet straight pipe and used for adjusting the flow pattern, and the throat part is used for accelerating gas and liquid to form gas-liquid two-phase critical flow. The flow velocity of the gas-liquid mixture in the throat pipe is ingeniously obtained by measuring ultrasonic propagation, and then simultaneous measurement of the gas flow and the liquid flow is achieved in combination with a throttling equation. The method is not affected by factors such as pipeline gas-liquid phase flow patterns, radioactive measurement methods such as gamma rays are not adopted, and the method has the advantages of being low in operation cost, convenient to operate, high in measurement precision and the like.

The invention discloses an intelligent identification metering method and an automatic calibration method for multi-source signal fusion of optical identification and a vibration probe. An automatic charging device, a stirring barrel, an environmental noise simulation device, a test pipeline, the vibration probe, an optical sensor, a data acquisition instrument, an upper computer and a slurry pump are included. The automatic charging device is installed in front of the stirring barrel, materials can conveniently enter the system, the environment noise simulation device simulates environment vibration, the probe is placed in the testing pipeline and transmits data to the upper computer through the data acquisition instrument, and the slurry pump is connected between the stirring barrel and the testing pipeline. The electromagnetic flowmeter solves the limitation of a traditional electromagnetic flowmeter, and is suitable for complex working conditions in the fields of mining industry, metallurgy and the like.

This application relates to a compressor intake pressure stabilizing device, including a compressor with an intake port; characterized in that the compressor intake pressure stabilizing device further includes an intake pipe, a regulating component, a venturi tube, a first flow monitor, a second flow monitor, and a central control module; the outlet end of the intake pipe is connected to the intake port; the regulating component is disposed on the intake pipe and located at the intake port; the regulating component has a degree of freedom to move radially along the intake pipe for opening and closing the intake port; the venturi tube is coaxially disposed within the intake pipe; the first flow monitor is disposed at the intake end of the intake pipe; the second flow monitor is disposed between the regulating component and the intake port; the central control module is electrically connected to the power sources of the first flow monitor, the second flow monitor, and the regulating component respectively; this application has the technical effect of automatically adjusting the air pressure before entering the compressor and improving the service life of the compressor.

The invention discloses a mud concentration determining system and method for a dredging construction pipeline and a storage medium. In the system, a signal acquisition device is used for acquiring the side wall voltage and clear water conductivity of a first mud discharge pipe when a mud conveying device conveys clear water, the side wall voltage and mud temperature of a second mud discharge pipe when mud is conveyed, and the cooling water conductivity and cooling water temperature of cooling water in a mud pump cooling device; transmitting the acquired data to a signal processing device; the signal processing equipment is used for determining the conductivity of carrier liquid in the slurry according to the temperature of the slurry, the temperature of the cooling water and the conductivity of the cooling water; the signal processing equipment is used for determining the mud conductivity according to the carrier liquid conductivity in the mud, the clear water conductivity, the first mud discharge pipe side wall voltage and the second mud discharge pipe side wall voltage; and the signal processing equipment is used for determining the slurry concentration of the slurry discharge pipe when the slurry conveying equipment conveys the slurry based on the conductivity of the carrier liquid in the slurry and the conductivity of the slurry. The practicability and the precision of determining the slurry concentration are improved.

The present invention provides a machine tool 1000 for machining a workpiece using a machining fluid. The machine tool 1000 comprises a workspace 1 for machining a workpiece, at least one fluid consumption unit 2 capable of supplying a machining fluid for workpiece machining to the workspace 1, a hydraulic system 3 that supplies the machining fluid to at least one fluid consumption unit 2, and a control device 4 for controlling the machine tool. The hydraulic system 3 comprises a pump 32 for transporting the machining fluid, an inlet 35 through which the machining fluid transported by the pump 32 is guided to at least one fluid consumption unit 2, a first measuring unit 351a and a second measuring unit 351b assigned to the inlet, and a flow rate measuring device 351. These are each configured to detect the flow rate of the machining fluid in the inlet 35. In this example, the control device 4 is configured to control the machine tool 1000 based on a first measured value detected by the first measuring unit 351a and / or a second measured value of the flow rate of the machining fluid passing through the inlet 35 detected by the second measuring unit 351b.

The subject matter of this specification can be embodied in, among other things, a fluid flow measurement apparatus includes an inlet configured to flow a dynamic fluid flow, an outlet configured to flow the dynamic fluid flow, a first fluid conduit fluidically connected between the inlet and the outlet, configured with a first predetermined geometry, and configured to flow a first portion of the dynamic fluid flow, a second fluid conduit fluidically connected between the inlet and the outlet, configured with a second predetermined geometry, and configured to flow a second portion of the dynamic fluid flow, and a first flow meter configured to measure the second portion of the dynamic fluid flow.

The invention relates to a flow meter (100) for determining a flow rate of a fluid in a medium conduit (200), comprising: - a sensor base (101) comprising an obstruction body (102) and a sensor main body (103), - an electronics unit (300) and - a signal interface (400), wherein - the obstruction body (102) is arranged essentially upstream of the sensor main body (103) in a flow direction, - the sensor main body (103) comprises a support body piece (110) and a substrate assembly (111) having at least one ceramic substrate (108, 109), and - a gas flow meter - sensor unit (104) and a vortex counter - sensor unit (105) are arranged on the substrate assembly (111).

A system for measuring the flow rate of a fluid medium includes an input line of a fluid medium, elements for measuring the flow rate of the fluid medium in transit which are interposed between the input line and the output line, and an electronic unit functionally associated with the elements for measuring.The elements for measuring include at least two connecting lines arranged in parallel between the input line and the output line, and a flowmeter in fluid communication with each one of the connecting lines. A corresponding interval of measurable flow rate values stored in the electronic unit is associated with each flowmeter.

The invention discloses an intelligent high-precision flow measuring device for experiments in the technical field of fluid experiments, which comprises an experiment table and a nesting structure, the nesting structure comprises a circular bottom plate, the bottom plate is provided with a small cylinder, a middle cylinder and a large cylinder which are nested in sequence, a small-flow water receiver is formed between the small cylinder and the circular bottom plate, and the small-flow water receiver is connected with the middle cylinder. A medium-flow water receiver is formed between the medium cylinder and the bottom plate, a large-flow water receiver is formed between the large cylinder and the bottom plate, the small-flow water receiver is provided with a first water level sensor in the height direction of the small-flow water receiver, and the medium-flow water receiver is provided with a second water level sensor in the height direction of the medium-flow water receiver. The large-flow water receiver is provided with a third water level sensor in the height direction of the large-flow water receiver, the experiment table is provided with a data processing unit, and the data processing unit is electrically connected with the first water level sensor, the second water level sensor and the third water level sensor through data transmission lines and is responsible for processing sensor signals and storing data. Experiment operation steps can be simplified, and the influence of vibration of the experiment table on results is reduced.

A flow sensor configured to sense a flow rate of a fluid. The flow sensor includes a first nozzle and a second nozzle. The first nozzle is configured to receive a first portion of a fluid flowing within a flow path and develop a first differential pressure. The second nozzle is configured to receive a second portion of the fluid flowing within the flow path and develop a second differential pressure. Control circuitry is configured to determine the flow rate using at least one of the first differential or the second differential pressure.

The present specification relates to the technical field of two-phase flow measurement, and particularly relates to a gas-liquid two-phase flow measurement method and device, computer equipment and a storage medium. The method comprises obtaining a measured volume flow, a measured mass flow and a measured density corresponding to a gas-liquid two-phase flow to be measured by a measurement device; collecting and calculating a first accurate density corresponding to a target liquid, and calculating a second accurate density corresponding to a target gas based on a gas pressure, a gas temperature and the target gas; substituting the measured volume flow, the measured mass flow, the measured density, the first accurate density and the second accurate density into a fitting formula to obtain fitting data; and processing the first accurate density, the second accurate density, the measured volume flow, the fitting data and the measured mass flow by using a mass separation formula to obtain a target gas mass flow and a target liquid mass flow corresponding to the target gas and the target liquid respectively, so that the mass flow of each phase can be determined conveniently and accurately.

The invention discloses a vibration probe type solid-liquid two-phase flow meter and a measuring method, a specially-made probe sensor is arranged in a pipeline to detect the frequency spectrum characteristics of vibration signals generated by collision of solid particles, and a calibration model is combined to synchronously obtain the fluid flow speed and the solid concentration. The device breaks through the limitation of a traditional electromagnetic flowmeter on the solid content and the particle size, has the advantages of being wide in measuring range, low in maintenance cost, high in anti-interference performance and the like, and is suitable for measuring high-concentration solid-liquid two-phase flow of mine tailings, building mud and the like.

The present application provides an asymmetric H-shaped two-phase metering system, which comprises: an asymmetric H-shaped device with an inlet end higher than an outlet end for realizing gas-liquid separation; a data acquisition and detection module arranged on the asymmetric H-shaped device for acquiring cyclone signal, water cut data, pressure difference data, gas data and liquid data; a metering module in communication with the asymmetric H-shaped device and the detection module for realizing online real-time metering of gas-liquid two-phase according to flow state combined with gas volume calculation model and / or gas-liquid two-phase calculation model. The present application realizes secondary separation metering of gas-liquid by using simple "H-shaped" structure, and has advantages of simple structure, low cost, small occupation, wide application range and the like. A multi-condition gas and liquid multi-factor comprehensive identification method of cyclone signal, pressure difference and water cut is proposed, which improves the accuracy of fluid determination. The signals of various sensors are used to respectively solve, correct and calculate the two-phase flow, which improves the accuracy of flow determination.

Systems and methods for sensing flow through a tube are disclosed The flow sensor comprises one or more heaters formed by one or more first electrically conductive thin-film traces and one or more temperature sensors formed by one or more second electrically conductive thin-film traces. The one or more heaters and the one or more temperature sensors may be provided on a flexible polymer substrate, and the flow sensor may be configured to be connectable to an outer surface of the tube such that the flexible polymer substrate conforms to the outer surface of the tube. At least one of the heaters and / or at least one of the temperature sensos may be arranged to cover a substantial part of a circumference of the medical infusion tube, e.g., at least 10 %, at least 25 %, at least 50 %, or at least 90 % of the circumference of the tube.

This invention discloses a system and method for calculating the exhaust characteristics of a low-pressure cylinder, comprising a boiler, a regenerative system, a feedwater pump turbine, a condensate pump, a condensate flow measurement device, a high-pressure cylinder, an intermediate-pressure cylinder, and a low-pressure cylinder. The regenerative system includes a high-pressure heater system and a low-pressure heater system. This invention eliminates the need for extending the expansion line. Using condensate flow as a reference, by installing drain flow measurement devices for low-pressure heaters 7 and 8, the drain flow rates entering low-pressure heater 8 and the condenser are measured. The difference between these two flow rates is the extraction steam flow rate of low-pressure heater 8. Combined with heat balance calculations for low-pressure heaters 5 and 6, the extraction steam flow rate of low-pressure heater 7 can be obtained. This allows for convenient and accurate calculation of the low-pressure cylinder exhaust flow rate and enthalpy, among other characteristic parameters.

The application discloses an outer clamping type ultrasonic flowmeter with bubble detection and flow correction and a measuring method. The upper clamp module bottom and the lower clamp module top are connected through a connecting shaft, the upper clamp module and the lower clamp module are both provided with a limiting groove, the two limiting grooves form a pipeline groove, a liquid pipeline is clamped in the pipeline groove, a first acoustic impedance matching layer is arranged between a first ultrasonic transducer and the liquid pipeline, and a second acoustic impedance matching layer is arranged between a second ultrasonic transducer, a third ultrasonic transducer and the liquid pipeline. The method comprises judging whether there is a bubble according to the signal strength received by the ultrasonic transducer, measuring the liquid speed in the liquid pipeline by using the time difference method or the Doppler method, correcting the error caused by the bubble, and obtaining the correct liquid flow. The ultrasonic flowmeter is suitable for liquid single-phase flow and gas-liquid two-phase flow, compensates the liquid flow under the gas-liquid two-phase flow, and makes the flow measurement result more accurate.

The invention relates to the technical field of water supply system abnormity analysis, in particular to a water supply system abnormity early warning method and device, electronic equipment and a storage medium. Secondly, for each water level data set, water level vectors are sequentially taken out from the water level data set for flow estimation, and a plurality of obtained flow estimation values are constructed into a flow estimation queue; secondly, for each time node, extracting flow estimation values from the plurality of flow estimation queues to construct flow vectors, and constructing an outlier index representing the difference degree of the flow vectors and historical sample flow vectors according to each flow vector; and finally, outputting a water supply abnormity early warning message according to the outlier indexes. According to the method, the flow estimation vectors are constructed based on the water level data, the water supply abnormity degree is determined through the difference degree between the multiple flow estimation vectors and the historical sample flow, the abnormity of the water supply system is analyzed from the data of the two dimensions of time and space, and the result is reliable and accurate.

This application discloses a hydrogen flow measurement device and apparatus. The hydrogen flow measurement device includes a first Coriolis flow meter, a second Coriolis flow meter, a third Coriolis flow meter, a first proportional solenoid valve, a second proportional solenoid valve, and a control unit. The full-scale values ​​of the first, second, and third Coriolis flow meters decrease sequentially. The first end of the first Coriolis flow meter is the flow inlet, and the second end is connected to both the first end of the second Coriolis flow meter and the first end of the first proportional solenoid valve. The second end of the second Coriolis flow meter is connected to both the first end of the third Coriolis flow meter and the first end of the second proportional solenoid valve. The second ends of the first and second proportional solenoid valves, together with the second end of the third Coriolis flow meter, serve as the flow outlet. The signal output terminal of the control unit is connected to the control terminals of each device.

The subject matter of this specification can be embodied in a fluid flow measurement device, among other things, that includes an inlet configured to flow a dynamic fluid flow; an outlet configured to flow the dynamic fluid flow; a first fluid conduit fluidically connected between the inlet and the outlet, configured with a first predetermined geometry, and configured to flow a first portion of the dynamic fluid flow; a second fluid conduit fluidically connected between the inlet and the outlet, configured with a second predetermined geometry, and configured to flow a second portion of the dynamic fluid flow; and a first flow meter configured to measure the second portion of the dynamic fluid flow.

The invention relates to a thermal flow meter (100), wherein the thermal flow meter (100) can be operated in a first measuring mode configured as a temperature difference operation (CTA) and in a second measuring mode configured as a constant current operation (CCA), in particular asynchronously with the first measuring mode. The thermal flow meter (100) is switchable between operation in the first measuring mode (CTA) and operation in the second measuring mode (CCA). Furthermore, the invention relates to a method for operating a measuring point (200) with the thermal flow meter (100).

This application provides a method, apparatus, device, and program product for detecting multiphase flow. The method includes: monitoring the vibration frequency, excitation current, and amplitude parameters of a measuring tube collected by a vibratory flowmeter within a preset time period; fluid flowing through the measuring tube; determining the fluctuation parameters of the measuring tube based on the vibration frequency; determining the damping characteristics of the measuring tube based on the excitation current and amplitude parameters; and determining whether the fluid is a multiphase flow based on the fluctuation parameters and damping characteristics. This method captures fluid characteristics through multi-dimensional parameters such as vibration frequency, excitation current, and amplitude; reflects static properties such as density and composition through fluctuation parameters; and characterizes the dynamic properties of flow resistance through damping characteristics. This improves the comprehensiveness of detection coverage, significantly reduces the false detection rate and false negative rate, and greatly enhances the reliability of multiphase flow detection results.