156results about "Volume flow measuring devices" patented technology

The invention discloses a multi-phase flow measurement monitoring method and system based on a pipeline, and belongs to the technical field of fluid measurement, and the method comprises the steps: obtaining an actual flow velocity value and a dual-mode sensing signal of a fluid in the pipeline; acquiring historical working condition data, dynamically adjusting the sampling frequency of the bimodal sensing signal, generating an optimized sensing sampling signal, and performing time-frequency domain combined noise reduction processing to generate edge end preprocessing data; performing multi-step prediction on the edge end preprocessing data by using a time sequence prediction model to generate a dynamic compensation coefficient; according to the dynamic compensation coefficient and the actual flow velocity value, a multiphase flow value is obtained through calculation, and an abnormal event early warning signal is generated according to the multiphase flow value. Resistance type and ultrasonic dual-mode signal fusion, time-frequency domain combined noise reduction and cloud edge collaborative dynamic compensation technologies are adopted, high-precision real-time monitoring of multiphase flow can be achieved, abnormal early warning and adjusting operation are intelligently triggered based on flow fluctuation, and pipeline operation safety and measurement reliability are comprehensively improved.

Disclosed are a maize on-demand fertilization control system and a soil nitrogen soft measurement method. Sensors transmit real-time data to a control unit, which calculates soil nitrogen content using an optimized BP neural network model. Based on maize's nitrogen demand, the system adjusts fertilization amounts using solenoid valves, achieving precise, cost-effective fertilization.

The invention belongs to the technical field of flow metering, and discloses a flow metering method, system and device based on the Internet of Things, and the method comprises the steps of monitoring data collection and transmission, monitoring data preprocessing, initial volume flow analysis, mass flow analysis and flow monitoring data display. The system comprises a monitoring data collection and transmission module, a monitoring data preprocessing module, an initial volume flow analysis module, a mass flow analysis module and a flow monitoring data display module. Multi-dimensional data acquisition is carried out by comprehensively using ultrasonic waves and a differential pressure type flow sensor, working condition identification is carried out by combining data acquisition nodes of the internet of things and a convolutional neural network, the volume flow is calculated according to a fusion weight matrix, and the mass flow is converted according to a mass flow calculation model. The mass flow rate of the natural gas can be measured at high precision under different working conditions, and the problem that the measurement precision is limited in a full working condition range in a traditional mode is solved.

The compressor air inlet pressure stabilizing device comprises a compressor, and the compressor is provided with an air inlet; the compressor air inlet pressure stabilizing device is characterized by further comprising an air inlet pipeline, a regulation and control assembly, a Venturi tube, a first flow monitor, a second flow monitor and a central control module; the air outlet end of the air inlet pipeline is communicated with the air inlet; the regulation and control assembly is arranged on the air inlet pipeline and located at the air inlet. The regulation and control assembly has a degree of freedom of moving in the radial direction of the air inlet pipeline and is used for opening and closing the air inlet; the venturi tube is coaxially arranged in the gas inlet pipeline; the first flow monitor is arranged at the air inlet end of the air inlet pipeline; the second flow monitor is arranged between the regulation and control assembly and the air inlet; the central control module is electrically connected with the first flow monitor, the second flow monitor and a power source of the regulation and control assembly. The method has the technical effects of automatically adjusting the air pressure before entering the compressor and prolonging the service life of the compressor.

The embodiment of the invention provides a substance measuring device and a substance measuring method, the substance measuring device comprises a pressure difference forming pipe, and the apertures of at least two positions in the pressure difference forming pipe are different; the pressure sensor is arranged at the upstream of the pressure difference forming pipe and is used for detecting pressure data in the pressure difference forming pipe; the temperature sensor is arranged on the pressure difference forming pipe and is used for detecting temperature data of a multiphase object to be detected; the microwave resonance sensor is connected with the pressure difference forming pipe, the microwave resonance sensor comprises a channel, and the channel is communicated with the pressure difference forming pipe and used for collecting resonance data caused by the multiphase matter to be measured; and the pressure difference sensor is arranged on the pressure difference forming pipe and is used for detecting the pressure difference of at least two positions of the pressure difference forming pipe.

The present invention discloses a dual-circulation intelligent water meter with dual meter heads and dual meter cores, which relates to the technical field of water meters, including a water meter body, and also including an inlet pipe and a return pipe respectively arranged on the water meter body, and two meter cores arranged in the water meter body, wherein the two meter cores are respectively an inlet meter core arranged in the inlet pipe and a return water meter core arranged in the return pipe. The dual-circulation intelligent water meter with dual meter heads of the present invention forms dual metering units and dual-pipeline differential metering by arranging two meter cores in the water meter body, which not only meets the need for accurate metering, but also solves the need for flowing living water for direct drinking water. At the same time, by setting the installation components, the efficiency of the meter core installation is improved and it is ensured that the force of each installation point of the meter core is uniform during the installation process.

The present invention relates to the technical field of liquid material metering, and in particular to a high-precision liquid material metering device, comprising a variable frequency pump and a support frame, wherein the outlet end of the variable frequency pump is connected to one end of a connecting pipe, the other end of the connecting pipe is connected to the upper end of a weighing bucket, a flow meter is installed on the connecting pipe, the support frame is an inverted U-shape, a weighing sensor is fixedly installed on the lower end of a cross bar of the support frame, the lower end of the weighing sensor is connected to the upper end of the weighing bucket, a first valve is also installed on the connecting pipe, and the first valve is located between the flow meter and the weighing bucket. By comparing and feedback the digital display curve of the flow meter and weighing the weight of the liquid material flowing per unit time through secondary reduction, the influence of the performance parameters of the variable frequency pump can be completely avoided, and the process of human intervention in adjusting the motor speed is reduced, and the system automatically enters and adjusts the speed in real time to ensure the accuracy of the liquid material.

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.

The invention discloses an oil and gas well multiphase flow metering system based on edge calculation. Comprising a multi-parameter collaborative acquisition and dynamic adaptation module, an improved electrical tomography data reconstruction and feature extraction module, a slug flow form identification and dynamic parameter analysis module, a multi-phase flow mass flow dynamic modeling and parameter coupling module, an edge end real-time calculation and data compression encoding module and a remote data interaction and storage module. According to the system, through cooperation of multiple modules, parameters such as pressure and temperature are collected, a dielectric distribution image is reconstructed through an improved model, characteristic quantity is extracted, a slug flow stage is recognized, parameters are calculated, a mapping relation is constructed, coupling influences are processed, operation coding is completed by means of edge calculation, and data storage and transmission are achieved. According to the system, the defects that in the prior art, model parameter adjustment is incomplete, and real-time performance is poor due to dependence on cloud computing are overcome, and accurate and efficient metering of multiphase flow is achieved.

The invention provides a multiphase flow metering automatic control method and device, a medium and a program product, and is applied to an automatic control system of a multiphase flow metering device.The method comprises the steps that metering data from a mass flow meter, a gas flow meter and a liquid level meter are obtained, time synchronization processing and unification processing are conducted on the metering data, and a standardized data set is generated; based on the standardized data set, characteristic parameters representing the multiphase flow state are extracted, and a state parameter set used for describing the current flow state is generated; when at least one index in the state parameter set meets an abnormal judgment condition, an abnormal flow state is judged, and a corrected liquid level value is generated; and based on the deviation value between the corrected liquid level value and the reference liquid level, a feedback control signal is calculated, and the opening degree of the valve is dynamically adjusted, so that the liquid level of the fluid in the outlet pipeline is automatically maintained within the preset height range. According to the automatic adjusting mechanism, the liquid level in the outlet pipeline can be automatically adjusted within the preset height range, and stable output of the liquid phase is achieved.

The present invention describes a gas volume and flow measurement device 1 comprising a flow cell compartment 2 with a definite and predefined 5 inner geometric volume, the flow cell compartment 2 having one gas accumulating end 3 and one lifting end 4 and having a pivoting element 5 enabling the flow cell compartment 2 to pivot upwards to release the gas contained therein and then downwards again to its initial position and operating by liquid displacement and according to the leverage effect, wherein said gas flow measurement device 1 also comprises a bubble counter unit 6.

The invention belongs to the field of oil-gas exploration, particularly relates to a gas-liquid two-phase metering method, system and equipment based on a fusion algorithm, and aims to solve the problem that gas-liquid two phases are difficult to meter. The method comprises the following steps: collecting original data in a target pipeline as input data through a multi-sensor module; converting the input data through an A / D converter to obtain digital input data; filtering and denoising the digital input data to obtain preprocessed input data; performing feature extraction on the preprocessed input data to obtain a sensor measurement value; performing fusion calculation on the sensor measurement values through a multi-source data fusion algorithm to obtain an initial flow value; based on a sensor measurement value, an initial flow value is corrected through a gas-liquid two-phase proportion measured by a precession vortex sensor and a high-precision matrix data iterative transmission algorithm between differential pressure flowmeters, and a corrected two-phase flow value is obtained.

The invention relates to the technical field of hydrological survey, and discloses a sediment flow monitoring device for hydrological survey, which comprises a shell, a water inlet and a water outlet are respectively formed in the left end and the right end of the shell, and a first flow sensor, a first filtering mechanism and a second flow sensor are sequentially arranged in the shell from left to right; the first filtering mechanism comprises a first filtering plate and a cleaning assembly which are arranged in the shell, and a filtering cylinder and a centrifugal weighing assembly are arranged on the lower side of the first filtering plate; according to the sediment flow monitoring device for hydrological survey, sediment adhering to the filter plate can be cleaned up into the filter cylinder through cooperation of the scraper and the air injection device, then weighing is conducted after centrifugation, the accuracy of the measurement result can be improved, a two-stage filter structure is arranged, data of the flow of small-particle-size sediment and the flow of large-particle-size sediment can be obtained, and the accuracy of the measurement result is improved. Richer experimental data are provided for hydrological survey, and water flow impact is used as power to block objects such as gravels in a water body outside the device, so that the measurement result is prevented from being influenced.

The present invention relates to a liquid-solid two-phase flow measurement method of acoustic-electric dual-mode sensor fusion, which is used to realize non-disturbance measurement of liquid-solid two-phase flow in a horizontal measurement pipeline. The sensors adopted include a dual-section resistance tomography sensor and a pulse wave ultrasonic Doppler sensor. The dual-section resistance tomography sensor is used to obtain the distribution of liquid-solid two-phase media in the pipeline and the flow velocity measurement of the bottom particle layer. The pulse wave ultrasonic Doppler sensor is used to obtain discrete phase flow velocity profile information. The flow velocity profile information measured under different flow states is converted into liquid-solid two-phase flow through interpolation-type integration.

The invention belongs to the technical field of gas-liquid two-phase oil and gas exploitation, particularly relates to a gas-liquid two-phase measuring device and method with temperature and pressure correction, and aims to solve the problem that a method in the prior art cannot meet the requirements for precision, reliability and cost performance at the same time. The invention discloses a gas-liquid two-phase measuring device and method with temperature and pressure correction. The device comprises a vortex precession flowmeter, an orifice plate flowmeter, a pressure transmitter and a temperature transmitter. The method comprises the following steps: calculating the correction density of a gas phase object under a working condition by combining a gas phase state equation; based on the overall volume flow and the volume flow of the gas phase object, the volume flow of the liquid phase object in the working state is calculated; further calculating the mass flow rate of the gas phase object under the working condition; further calculating the standard volume flow of the gas phase object under the standard working condition by combining the law of conservation of mass; and finally, calculating the accumulated volume flow of the gas-liquid two-phase object. The invention provides the metering device and the metering method which are good in stability and high in metering precision.

The utility model discloses a flow measuring device which comprises a first flow meter, a second flow meter and a flow monitoring device which are arranged in a pipeline, the measuring range of the first flow meter is larger than that of the second flow meter, the flow monitoring device is used for detecting the flow in the pipeline, and a preset value is set in the flow monitoring device. The preset value is smaller than the measuring range of the first flowmeter; the flow monitoring device has two states, when the actual flow in the pipeline is larger than a preset value, the flow monitoring device is in the first state, and when the actual flow in the pipeline is smaller than the preset value, the flow monitoring device is in the second state. The medium flow can be respectively and accurately measured regardless of the size of the medium flow, the phenomena of flow measurement errors and distortion are eliminated, energy measurement is more accurate, and cost analysis is specific and easy to control.

A system includes a conduit, a multiphase fluid, and a measurement unit. A multiphase fluid is disposed within the conduit. The measurement unit is connected to the conduit and includes a cylindrical structure, a first magnet, a second magnet, a first coil, and a second coil. The cylindrical structure is submerged in the multiphase fluid and has a first end and a second end. A first magnet is connected to a first end of the cylindrical structure and a second magnet is connected to a second end of the cylindrical structure. The first coil is wound on the outer peripheral surface of the pipe, and the position of the first coil corresponds to the position of the first magnet arranged in the hole. The second coil is wound on the outer peripheral surface of the pipe, and the position of the second coil corresponds to the position of the second magnet arranged in the hole.

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

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 an oil-gas-water three-phase flow measuring device and method based on a uniform-speed tube vortex street and a microwave antenna, and relates to the technical field of three-phase flow detection. The device comprises a bluff body, a pressure difference transmitter, a power divider and a microwave signal source, the bluff body is vertically placed at the central position in a target pipeline, two cavities, namely a high-pressure cavity and a low-pressure cavity, are formed in the bluff body, the high-pressure cavity and the low-pressure cavity are both connected with the pressure difference transmitter, one end of the bluff body is connected with a power divider, and the power divider is further connected with a microwave signal source; the high-pressure cavity is arranged on the incident flow surface of the bluff body, and the incident flow surface is the front side surface of the bluff body; the low-pressure cavity is arranged on the back flow surface of the bluff body; and the back flow surface is the rear side surface of the bluff body. The gas content and the water content of the oil-gas-water three-phase mass flow can be measured while the oil-gas-water three-phase mass flow is accurately calculated, the manufacturing cost of the measuring device is reduced, and the structure of the device is optimized.

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 method (200) is used to detect a creep flow in a pipeline (110) by means of two ultrasonic transducers (122, 124) arranged thereon using the transit time difference method; the method (200) comprising the following steps: repeatedly determining (210) primary transit time difference measured values ​​between first transit time measured values ​​of ultrasonic signals that run from the first ultrasonic transducer (122) to the second ultrasonic transducer (124) and second transit time measured values ​​in the opposite direction; determining a transit time difference mean value (220) of the first type based on a tuple of the first type of not fewer than 40, for example not fewer than 80 and in particular not fewer than 160, of the primary transit time difference measured values; comparing (230) the transit time difference mean value with a threshold value;and detecting a creep flow (240) when the first type of transit time difference average exceeds the threshold value, wherein the threshold value is not more than 5 ns, for example not more than 2 ns and in particular not more than 1 ns;

The invention discloses a flowmeter valve fault detection method, device and system, and the method comprises the steps: carrying out the fluid flow velocity measurement and fluid component measurement of a multi-phase fluid generated at a wellhead based on a magnetic resonance flowmeter located on a field branch pipeline, if the magnetic resonance flowmeter fails in fluid flow velocity measurement or fluid component measurement, the magnetic resonance flowmeter is started; if yes, fault detection is carried out on a first valve, a second valve and a third valve based on a first pressure gauge located at a wellhead, a second pressure gauge located on an output pipeline, a fourth valve and a fifth valve which are located on a field branch pipeline, a sixth valve located on a field main pipeline, a temperature and pressure gauge and a pressure release valve; and determining a target valve with a fault and a fault state corresponding to the target valve. Through the technical scheme of the embodiment of the invention, rapid detection of the fault of the flow meter valve is realized, manual participation is reduced, and the fault detection efficiency of the flow meter valve is improved.

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 present invention discloses a metering method for an intelligent water meter, which relates to the technical field of water meter metering. It includes: arranging at least three water flow monitoring units in a target intelligent water meter through a combination method to obtain a monitoring unit set, and the monitoring unit set is used for individual metering and combined metering; through a first acquisition method, obtaining the water consumption segmented data of a target user to obtain segmented data items, and the segmented data items are used for segmenting the water consumption data of the target user. By arranging at least three water flow monitoring units in the target intelligent water meter in the present invention, and through the first acquisition method, obtaining the water consumption segmented data of the target user, and then through a second acquisition method, obtaining the temperature data and humidity data of the monitoring unit set, and matching the monitoring unit set through a matching method to obtain a target water flow monitoring unit, thus achieving an intelligent metering effect of automatically selecting a suitable water flow monitoring unit for metering according to different environments.

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 utility model relates to a cyclone separation type multiphase flow metering device, which belongs to the technical field of gas-liquid separators and comprises a cyclone separator, and a detection device for metering and detecting multiphase flow is arranged on the outer side of the cyclone separator. The detection device comprises a linkage valve controller fixedly connected to the upper side of the cyclone separator, a double-flange differential pressure liquid level meter fixedly connected to the side face of the cyclone separator and a gas differential pressure transmitter fixedly connected to the right end of the upper side of the cyclone separator. According to the cyclone separation type multiphase flow metering device, the gas-liquid outlet valve position is controlled through the linkage valve, then the liquid level of the cyclone separator is controlled, the cyclone separator is in a relatively stable state, the optimal separation effect is achieved, then the liquid flow is metered through the combination of the floating target flowmeter and the double-flange differential pressure transmitter, and the metering efficiency is improved. The gas flow is metered through the gas differential pressure transmitter and the temperature and pressure transmitter.

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 system includes a pipe, a multiphase fluid, and a measurement unit. The multiphase fluid is disposed within the pipe. The measurement unit is connected to the pipe and includes a cylindrical structure, a first magnet, a second magnet, a first coil, and a second coil. The cylindrical structure is submersed in the multiphase fluid and has a first end and a second end. The first magnet is connected to the first end of the cylindrical structure, and the second magnet is connected to the second end of the cylindrical structure. The first coil is wound around the outer circumferential surface of the pipe in a location corresponding to a location of the first magnet disposed within the orifice. The second coil is wound around the outer circumferential surface of the pipe in a location corresponding to a location of the second magnet disposed within the orifice.