94 results about "Discharge measurements" patented technology

The invention is suitable for the technical field of water environment monitoring, and provides an in-situ monitoring device for a surface water-underground water conversion relation and flux, and the device comprises a control platform which is located on a water bank and comprises a power supply module, a data processing module and a flow measurement module; the probe is located under the surface water surface and used for collecting data, one end of the probe is sharp and inserted into a riverbed, and the other end of the probe is exposed in the surface water; and the probe is connected with the control platform. According to the invention, the number and positions of the probes embedded into the riverbed can be adjusted according to different monitoring requirements, and the surface water-underground water conversion relation and flux at different depths of the profile can be monitored continuously in real time; a power supply mode and a data storage or data transmission module can be selected according to actual application conditions, so that the continuous observation capability of the instrument is improved; the requirement for the installation environment is low, and automatic data collection is achieved; the accuracy of the measured conclusion is high; and the equipment damage condition and the data reliability in the monitoring process can be checked.

The invention provides a channel flow inversion method, and relates to the technical field of hydrology, water resources and hydraulic engineering, and the method comprises the steps: debugging a calculation case through computational fluid mechanics software OpenFOAM; using scripts to copy and modify the calculated case river channel parameters in batches; calling computational fluid mechanics software OpenFOAM in a script mode to solve all calculation cases in batches, and calculating a simulation structure to construct a data set; constructing a deep learning model based on the data set; training the deep learning model; and reading section time-average flow velocity distribution from the flow velocity distribution cloud picture, and performing channel flow inversion by using the trained deep learning model. The open channel flow measuring method solves the problems that an existing open channel flow measuring method is low in precision, high in cost, limited in application range and the like, and rapid and accurate measurement of the open channel flow is achieved.

The invention relates to the technical field of flow measurement, in particular to a device for measuring and calculating average flow of river and canal sections in any shapes, which comprises a ship, a sonar device mounted on the ship and a flow velocity and water head measuring device, and the sonar device and the flow velocity and water head measuring device are both communicated with a data processing device. The flow velocity and water head measuring device is a Pitot tube, and the Pitot tube comprises an underwater protection tube wall, a pressure measuring tube water head measuring tube connected to the underwater protection tube wall through a first connector, and a full water head measuring tube connected to the underwater protection tube wall through a second connector and extending into the underwater protection tube wall. And the data processing device is connected with a data display module. According to the method, the representativeness and the accuracy of flow measurement data in actual engineering and hydraulic calculation can be improved.

The invention provides a U-shaped channel flow measurement method, system and device, and relates to the technical field of flow measurement, and the method comprises the steps: collecting channel parameters and water body parameters, calculating a flow influence index, a flow stability index and a water quality influence index, and calculating the area of a flowing cross section according to the water level and channel width data; and constructing a flow prediction model based on deep learning, inputting the area of the flowing cross section at the current moment, the flow influence index, the flow stability index and the water quality influence index into the flow prediction model, outputting predicted channel flow data by the model, comparing the flow data with a preset flow threshold value, and judging whether the flow is abnormal or not. According to the scheme, the flow condition of the U-shaped channel can be evaluated and predicted in real time, the flow monitoring efficiency of the U-shaped channel is improved, and agricultural production safety is guaranteed.

The invention discloses equipment and a method for measuring the river flow of a runoff type hydropower station, the influence of media such as silt on flow velocity measurement is weakened through an active measurement mode of pumping back flushing, meanwhile, the slope of the river is introduced into the flow velocity measurement process to obtain the real flow velocity of the river, and the real flow velocity of the river is calculated on the basis of the real flow velocity. The average speed of the river is obtained; then, a river channel section function is constructed to obtain the river channel average section area between the reservoir area starting point and the measuring point, and therefore the influence of river channel irregularity on flow measurement can be reduced; finally, according to the average speed and the average section area, the real flow of the river channel can be obtained. Therefore, the influence of factors such as non-uniform instantaneous flow velocity, river channel gradient and irregular river channel on flow measurement is solved, so that the accuracy of natural flow velocity measurement and flow measurement of the river channel of the runoff type hydropower station is improved; therefore, the method is very suitable for large-scale application and popularization.

The present disclosure discloses a high precision channel flow measurement device and method based on a principle of multi-point head loss. A flow velocity of a designated position is acquired by using a flow measurement tube; the flow measurement tube is moved in a vertical direction through a convex sliding block and a motion guide pillar to measure the flow velocity at different measurement points on a measurement line; an overall flow measurement part is integrally ascended, that is, the motion guide pillar leaves a water body, in combination with a load bearing telescopic lifting frame; the overall flow measurement part integrally moves left and right in a longitudinal direction through a telescopic guide rod to reach a set position; the overall flow measurement part is integrally descended through the load bearing telescopic lifting frame, that is, the motion guide pillar enters the water body to acquire the flow velocity.

The invention discloses a gas-liquid two-phase flow measurement method based on a bent pipe and an acoustic emission technology, and belongs to the field of gas-liquid two-phase flow measurement. The method comprises the steps that the average liquid holdup HL of two-phase flow in a pipeline is measured, and the instantaneous speed Vc of a gas phase and a liquid phase passing through the 45-degree section of the bent pipe is calculated; identifying a gas-liquid two-phase flow pattern in the pipeline; taking the Vc, the HL, the apparent liquid velocity VSL and the apparent gas velocity VSG as variables, and adopting a dimensional analysis method to propose a correlation between the Vc and the VSL and between the HL and the VSL and between the VSL and the VSG according to different flow patterns; calculating an effective voltage value RMS of the acoustic emission signal, and establishing a correlation between the RMS and the VSL and VSG; fitting parameters in the correlation formula; newly collected Vc, HL and RMS are input into the fitted correlation formula, VSL and VSG are output, and therefore measurement of the gas-liquid two-phase flow is completed. Compared with a single-phase metering method after separation commonly used in the oil and gas industry, the device has the advantages of being simple in structure, low in measurement cost, capable of achieving real-time measurement, non-invasive and the like.

The invention discloses a pipeline flow measurement method and device for a non-full-flow pipeline, and relates to the technical field of pipeline flow measurement, measurement is carried out through a pipeline flow measurement system, and the pipeline flow measurement system comprises a sonar probe which is arranged in the pipeline and floats on the water surface of the pipeline and a Doppler flow meter which is arranged in a water passing area in the pipeline. The method comprises the steps that a target echo signal, detected by a sonar probe, of a water passing area in a pipeline is acquired, and section contour data and section area of the water passing area are determined according to the target echo signal; performing grid division on the water passing area according to the section contour data to obtain a preset number of grid units, and calculating flow velocity distribution of each grid unit through frequency shift detected by a Doppler flow velocity meter; on each grid unit, the corresponding flow velocity value is multiplied by the area of the grid unit according to the flow velocity distribution, and then summation is carried out to obtain the pipeline flow. The problem that in the prior art, the accuracy is low when the pipeline flow of the non-full-flow pipeline is measured is solved.

The embodiment of the invention provides a flow measuring device, method and equipment for a drainage pipeline and a medium, and relates to the technical field of drainage pipelines. The device comprises a first fixing unit, a flow detection unit and a lifting unit, the first fixing unit is fixedly arranged in an inspection well of the drainage pipeline, the flow detection unit and the second fixing unit are both fixedly connected with the first fixing unit, and the bottoms of the flow detection unit and the first fixing unit are located on the same plane; the flow detection unit is used for determining the water flow velocity and the water flow of water in the drainage pipeline. The method comprises the following steps: determining a water body flow velocity and an offset parameter detected by a flow detection unit and a rotation parameter corresponding to a lifting unit; and performing offset compensation processing on the water body flow velocity based on the offset parameter to determine the water body flow of the water body in the drainage pipeline. The precision and stability of flow measurement of the drainage pipeline are improved.

An object of the present invention is to provide a flow velocity measuring system in which a sensor is not in contact with water and which can measure a flow velocity of water with a simple configuration. Another object of the present invention is to provide a novel flow rate measurement system capable of measuring a flow rate of water based on the flow velocity.SOLUTION: The flow velocity measuring system includes a drainage pipe, a distance sensor, and a measuring unit, the drainage pipe being capable of discharging water from a water discharge port in a horizontal direction, the distance sensor being disposed at an arbitrary position facing the water discharge port at a horizontal distance D and a vertical distance Y from the water discharge port and being capable of detecting a horizontal distance Xo from the water discharge port to water, the measurement means is capable of measuring the flow velocity Vo of the water discharged from the water discharge port from Xo, D, Y, and the gravitational acceleration g.SELECTED DRAWING: Figure 1

The utility model belongs to the technical field of open channel flow measuring devices, and particularly relates to an automatic flow measuring device for a Parshall measuring weir, which comprises a Parshall groove. A throat section is arranged in the middle of the Parshall groove, a water level plate is arranged in the throat section, a water level gauge is arranged on the inner wall of the water level plate, guide rails are fixedly installed on the two sides of the water level plate, floating devices are slidably connected to the surfaces of the guide rails, and a fixing block is fixedly installed at the top of the throat section. The bottom of the fixing block is movably provided with a camera device, the top of the fixing block is fixedly provided with a supporting column, the top of the supporting column is fixedly connected with a solar panel, through the arrangement of the floating device, the position of the floating device can be automatically adjusted according to the change of the water level, and when the water level rises, the floating device also rises; therefore, the actual water level change condition can be reflected more accurately.

The invention provides a self-adaptive dual-mode flow metering device and method for a riverway ecological water replenishing recharge well, and relates to the technical field of hydrological monitoring. The device monitors the water level in the well in real time by arranging a second water level sensor, and a control unit intelligently judges whether the current recharge working condition is a water falling working condition or a full pipe flow working condition according to the water level information; further, a volume method or a flow velocity method is autonomously selected for flow measurement, and continuous, accurate and automatic monitoring of the flow under the full-working-condition operation condition of the recharge well is achieved; under the water drop working condition, the electric on-off valve is closed to accumulate water flow in the cylindrical measuring cylinder, and the average flow is calculated based on the water level in the cylinder measured by the first water level sensor; under the full pipe flow working condition, the valve is kept open, and the instantaneous flow is calculated based on the section average flow velocity measured by the Doppler flow meter; and due to automatic switching of the two modes, the reliability and adaptability of flow monitoring of the recharge well in a complex dynamic environment are remarkably improved.

This water meter comprises: a flow rate measurement unit for measuring the flow rate of water; a pattern information acquisition unit for acquiring use pattern information that is information indicating a usage flow rate of water for each time band on the basis of a measurement result obtained by the flow rate measurement unit; a zero time band information acquisition unit for acquiring, as zero time band information, information pertaining to a time band in which the flow rate becomes zero on each day constituting a prescribed period on the basis of the use pattern information; a zero continuation period information acquisition unit for acquiring, as zero continuation period information, information pertaining to a time band in which the flow rate becomes zero over all days in the prescribed period from the acquired zero time band information; a determination unit that determines a water leakage assessment time band on a day on the basis of the zero continuation period information; and a discernment unit that identifies whether the flow rate measured by the flow rate measurement unit in the water leakage assessment time band is zero, and discerns that there is water leakage in cases where the flow rate is not zero.

The present application relates to sewage treatment technical field, specifically to a kind of weir gate water flow measurement method.The method measures the liquid level before weir gate, flow rate, the opening height of weir gate and the flow rate after water flow through weir gate, by measuring these more accurate data, avoid the flow rate of directly measuring weir gate water flow in traditional measurement, due to the existence of liquid level collapse and flow rate fluctuation, inaccurate condition, and these accurate data are calculated, more accurate measurement results can be obtained.The method of the present application overcomes the limitation that the traditional flow measurement must be straight inlet channel, can be applied to the application scene that water flow inlet channel has no straight pipe section and water flow changes greatly, has wide application range, compared with traditional measurement method, measurement error is reduced from about 20% to about 5%, greatly improves the precision of measurement, has important guiding significance for subsequent process control and reagent dosage in sewage treatment process.

The present invention discloses a flow measurement method and system under complex water flow conditions, the method comprising the following steps: according to the flow measurement section position, determine the three-dimensional hydrodynamic model modeling area and the model inlet and outlet positions and verification positions, and establish a three-dimensional hydrodynamic model; use image recognition technology to obtain the water level, surface velocity and boundary section flow data of the boundary section and the verification position; perform parameter calibration and verification on the established three-dimensional hydrodynamic model; use the three-dimensional hydrodynamic model for simulation to obtain the flow of the measurement section; use the measurement section flow as output to construct an LSTM artificial intelligence model and a model training set and a test set, train the LSTM model algorithm, use the trained LSTM model for rapid calculation, and obtain real-time flow measurement data. The present invention solves the problems of no stable corresponding relationship between water level and flow under complex water flow conditions, inaccurate estimation of cross-sectional area using a single water level value for non-planar water surfaces, and provides a rapid calculation method for flow.

To provide a flow rate measurement device capable of accurately grasping the flow rate of fluid used for cleaning the interior of a fluid pipe, and improving the management and operation of the fluid use amount.SOLUTION: A flow rate measurement device 1 for measuring the flow rate of fluid discharged from a nozzle 62 (discharge port) of a fire hydrant 60 as a flow channel constitution member, includes at least: a connection part 11 which is connected to the nozzle 62; and an extension pipe part 12 which communicates with the connection part 11 and extends substantially vertically upward. A measurement device 14 as a measurement unit to measure the flow rate of the internal fluid is provided in a specific region E1 of the extension pipe part 12 where the internal fluid forms the steady flow.SELECTED DRAWING: Figure 1

An irregular river channel cross-section flow measurement device and method, comprising a computer, a signal receiver, a left support and a right support. The left support and the right support are respectively arranged on the left and right sides of the river channel. A cable is provided between the left support and the right support, and the cable is perpendicular to the river water flow direction. A rotary connection seat for fixedly installing a sonic depth finder is fixedly arranged on the cable, or a movable pulley assembly for fixedly connecting a sonic depth finder and a radar speedometer is slidably arranged on the cable. The sonic depth finder and the radar speedometer transmit signals to the signal receiver through wireless communication, and the signal receiver is communicatively connected to the computer. The principle of the present invention is scientific and the operation is convenient. By using the rotary connection seat in cooperation with the sonic depth finder, the small-scale concave and convex conditions of the river channel cross-section can be better understood, and the river channel cross-section can be correctly simulated according to the angle and distance, and the test data is more accurate.

This invention discloses a device and method for measuring river flow in a run-of-river hydropower station. The invention employs an active measurement method using pumping backflush to reduce the influence of sediment and other media on flow velocity measurement. Simultaneously, it incorporates river slope into the flow velocity measurement process to obtain the true river velocity, and based on this, derives the river's average velocity. Then, by constructing a river cross-sectional function, the average cross-sectional area of ​​the river from the reservoir's starting point to the measurement point is obtained, thus reducing the impact of river irregularities on flow measurement. Finally, based on the average velocity and average cross-sectional area, the true river flow can be calculated. Therefore, this invention solves the problems of uneven instantaneous flow velocity, river slope, and river irregularities on flow measurement, thereby improving the accuracy of natural flow velocity and flow measurement in run-of-river hydropower stations. Therefore, it is highly suitable for large-scale application and promotion.

This application relates to an adaptive correction method and system for flow measurement parameters in approximate standard open channels. The method constructs a basic flow model based on the target channel design parameters, and calculates the theoretical basic flow based on water depth and water level difference. Under different operating conditions, water depth, water level difference, and corresponding high-precision reference flow are collected to obtain the theoretical basic flow. The channel is then divided into several water depth intervals according to the water depth range, and a dynamic correction function for each interval is fitted based on the calibration data of each interval. During operation, real-time water depth and water level difference are collected, and the real-time theoretical basic flow is obtained using the basic flow model. Then, the target interval is selected according to the current water depth, and the corresponding dynamic correction function is called for correction to obtain the actual flow, which is then output. This application effectively reduces the system deviation between the theoretical model and actual operating conditions without increasing the complexity of hardware, achieving high-precision flow measurement under different water depths and water level differences, and improving the accuracy and applicability of flow measurement.

To provide a flowmeter capable of reliably mounting a flow measurement unit whose mounting direction is prescribed in the prescribed direction.SOLUTION: A flowmeter includes: a flow measurement unit 10 which has a measurement channel section 11 through which a fluid to be measured flows and measures the flow rate of the fluid flowing through the measurement channel section 11; a gasket 30 which is attached to the downstream side of the flow of the fluid to be measured around the flow measurement unit 10 and is not attached to the upstream side of the flow of the fluid; and an internal machine case 50 which is attached from the outside with the flow measurement unit 10 on which the gasket 30 is attached, and which flows the fluid to be measured flowing through the measurement channel section 11 of the flow measurement unit 10 and relays the fluid to a discharge path which discharges the fluid.SELECTED DRAWING: Figure 2

The invention discloses an automatic flow measurement method and system for a straight opening section of a trunk canal, and belongs to the field of big data analysis and mining, and the method comprises the following steps: constructing a uniformity index, and selecting a flow velocity calculation method according to an index value; monitoring the sand content dynamic correction roughness in real time, and iteratively calculating the correction flow velocity; the method comprises the following steps of: calculating initial flow rate according to a corrected flow rate and a real-time section area by combining and analyzing a spiral flow risk, checking and verifying, correcting an influence value by superposing a spiral flow correction coefficient, and outputting final corrected flow rate. High precision and intelligentization of main canal flow velocity and flow measurement are achieved, spiral flow parameters are associated with a first factor of uniformity, spiral flow risks are judged through double standards, possible deviation caused by single parameter judgment is reduced, meanwhile, manual intervention is reduced, flow measurement efficiency and stability are improved, and a solid foundation is laid for subsequent analysis and system optimization.

This application relates to the field of flow measurement technology, specifically to a bridge-type flow measurement method, device, and system based on real-time water level triggering. The method includes: acquiring the water level at a flow monitoring point in real time and determining whether a measurement command is triggered; when triggered, acquiring echo signals from multiple measurements; based on the significance of local peaks, signal strength, irregularity, bandwidth in the frequency domain, and high-frequency energy attenuation of the echo signals from each measurement, and combined with the difference between the frequency of the echo signals and the frequency of the transmitted signals, constructing usable coefficients for each measurement; thereby filtering usable signals from all echo signals after the current measurement command is triggered, and calculating the river flow at the flow monitoring point at the time the measurement command is triggered. This application improves the accuracy of river flow measurement by filtering echo signals containing more river flow information from all measurement echo signals.

The application provides a sensor-based water level and flow data processing method and system, relates to the technical field of hydrological monitoring data processing, integrates water level data, flow velocity profile data, acoustic echo feature data and water turbidity data, determines that the water body is in a high turbidity state when the water turbidity is continuously higher than a preset threshold and the water level and flow velocity change amplitude is low, deeply analyzes the acoustic echo feature data, and generates a reliability score of the flow velocity data of each depth layer in the flow velocity profile. The reliability score is used for weighted processing of the flow velocity data, low reliability data is corrected or replaced, and finally the cross-section average flow velocity is calculated based on the weighted processed flow velocity data, and the instantaneous flow is obtained by combining the cross-section area. The application overcomes the defects of data processing logic modularization and lack of cross-sensor data cross-validation in the prior art, and significantly improves the flow measurement accuracy and reliability of the hydrological monitoring system under complex water quality conditions.

The invention discloses a water conservancy project flow intelligent measuring method, and belongs to the technical field of water conservancy projects. A hydraulic engineering flow intelligent measuring method comprises the following steps that S1, flow measuring equipment abuts against the end of a pipeline, and the flow measuring equipment and the central axis of the pipeline are located on the same axis; s2, the flow measuring equipment is assembled at the end of the pipeline, and the joint of the flow measuring equipment and the pipeline is sealed; s3, measuring the amount of water flowing at the end part of the pipeline by using an intelligent flow meter in the flow measurement equipment; the flow measuring device can be stably installed at the end of the pipeline, it is guaranteed that the joint of the pipeline port and the flow measuring device is sealed, and the accuracy of the flow measuring result is improved.

The invention discloses a water conservancy flood control pipeline flow measurement method based on image recognition and multi-source perception. According to the method, an intelligent data fusion algorithm is adopted, the problems of overflowing area errors and uneven flow velocity distribution caused by sedimentation are dynamically corrected, and the precision, reliability and environmental adaptability of flow measurement of the drainage pipeline under the complex working condition are remarkably improved. In the whole measurement process, no personnel need to enter the pipeline, and effective technical equipment is provided for urban flood control and intelligent management of a drainage pipe network.

The invention discloses a river flow measurement method based on satellite-borne SAR along-track interference, and relates to the technical field of river flow measurement. Comprising the following steps: S1, selecting a straight and along-track vertical river reach of a to-be-measured river as a flow measurement area, and obtaining a satellite-borne SAR along-track interference image of the flow measurement area, the cross section terrain of the flow measurement area and the water level; s2, calculating an interference phase of a river measurement area according to the satellite-borne SAR along-track interference image in the S1, and performing inversion calculation by using the interference phase of the river measurement area to obtain a river surface flow velocity of a flow measurement area; and S3, determining flow velocities of different areas on the cross section of the flow measurement area according to a cross section vertical flow velocity distribution rule on the basis of the cross section terrain and water level of the flow measurement area obtained in S1 and the surface flow velocity of the flow measurement area obtained in S2, and calculating the cross section flow of the flow measurement area so as to obtain the flow of the to-be-measured river. According to the invention, large-range, long-period and all-weather river flow measurement can be realized.

The method, device and storage medium for correcting the influence of sediment concentration on open channel flow measurement accuracy provided by the present disclosure comprise: synchronously measuring the flow of a reference flow measurement device and an open channel flow measurement device to be detected under different flow measurement conditions, wherein the parameters of the flow measurement conditions at least include the sediment concentration; taking the flow measurement value of the reference flow measurement device as the true value, dividing the flow measurement value of the open channel flow measurement device to calculate the flow correction coefficient of the open channel flow measurement device under different flow measurement conditions; taking the parameters of the flow measurement conditions as the independent variable to obtain a function expression of the flow correction coefficient; substituting the parameters of the flow measurement conditions of the water body to be detected into the function expression to obtain the flow correction coefficient under the actual flow measurement conditions, and multiplying the flow measurement value of the open channel flow measurement device by the flow correction coefficient to obtain the flow correction value of the open channel flow measurement device. The present disclosure weakens the trend influence of the sediment concentration on the flow measurement accuracy of the device, and improves the adaptability of the device in the flow measurement of the sediment-laden water flow.

The invention relates to the technical field of riverway water level monitoring, in particular to a riverway flow direction and flow monitoring device and a monitoring method thereof.The monitoring device comprises a connecting part, a flow direction monitoring mechanism and a flow measuring mechanism, one end of the connecting part is installed on a dam of a riverway, and the flow direction monitoring mechanism and the flow measuring mechanism are both installed at the other end of the connecting part; the flow measuring mechanism is located under the flow direction monitoring mechanism, the flow direction monitoring mechanism is in sliding connection with the connecting part, the flow measuring mechanism is connected with the connecting part, the flow direction monitoring mechanism comprises a guiding part, a supporting part and two suspension balls, the guiding part is in sliding connection with the other end of the connecting part, the supporting part is installed on the guiding part, and the two suspension balls are arranged on the supporting part. The two suspension balls are located on the two sides of the supporting part correspondingly, and the suspension balls are slidably connected with the guiding part. The flow direction of the river channel is monitored through the flow direction monitoring mechanism, the flow of the flow measurement section of the river channel is monitored through the flow measurement mechanism, and the monitoring efficiency of the flow direction and the flow of the river channel can be improved.