CN110426084B - Unfull pipe integrated flow measurement device and method - Google Patents
Unfull pipe integrated flow measurement device and method Download PDFInfo
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- CN110426084B CN110426084B CN201910549976.7A CN201910549976A CN110426084B CN 110426084 B CN110426084 B CN 110426084B CN 201910549976 A CN201910549976 A CN 201910549976A CN 110426084 B CN110426084 B CN 110426084B
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- 238000005259 measurement Methods 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims abstract description 26
- 239000007788 liquid Substances 0.000 claims abstract description 77
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 49
- 238000012937 correction Methods 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 4
- 238000012795 verification Methods 0.000 claims description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 3
- 229910052744 lithium Inorganic materials 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 238000013461 design Methods 0.000 claims description 2
- 230000001681 protective effect Effects 0.000 claims 2
- 230000010354 integration Effects 0.000 abstract description 6
- 238000012544 monitoring process Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- QVFWZNCVPCJQOP-UHFFFAOYSA-N chloralodol Chemical compound CC(O)(C)CC(C)OC(O)C(Cl)(Cl)Cl QVFWZNCVPCJQOP-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000013049 sediment Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/002—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow wherein the flow is in an open channel
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/26—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
- G01F23/263—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
- G01F23/296—Acoustic waves
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Electromagnetism (AREA)
- Thermal Sciences (AREA)
- Acoustics & Sound (AREA)
- Measuring Volume Flow (AREA)
Abstract
本发明涉及明渠测流技术领域，特别涉及一种不满管一体化测流装置及方法，该装置包括流量测量模块、液位测量模块、装置箱体和控制器，所述流量测量模块设置于所述装置箱体两侧，用于测量所述装置箱体内水流的流速值信号，所述液位测量模块设置在所述装置箱体出水口处，用于测量装置箱体内水流的液位值信号，所述控制器分别与流量测量模块、液位测量模块连接，用于根据获取的流速值信号、液位值信号来计算经过箱体的水流流量。本发明的目的在于提供一种不满管一体化测流装置及方法，以解决现有明渠测流设备只能满管测流或非满管流测量不准确、功能单一、集成度低的问题。
The present invention relates to the technical field of open channel flow measurement, and in particular to a non-full pipe integrated flow measurement device and method, the device comprising a flow measurement module, a liquid level measurement module, a device box and a controller, the flow measurement module is arranged on both sides of the device box, and is used to measure the flow velocity value signal of the water flow in the device box, the liquid level measurement module is arranged at the water outlet of the device box, and is used to measure the liquid level value signal of the water flow in the device box, the controller is respectively connected to the flow measurement module and the liquid level measurement module, and is used to calculate the water flow rate passing through the box according to the acquired flow velocity value signal and liquid level value signal. The purpose of the present invention is to provide a non-full pipe integrated flow measurement device and method, so as to solve the problems that the existing open channel flow measurement equipment can only measure the flow of the full pipe or the non-full pipe flow measurement is inaccurate, has a single function and a low integration.
Description
Technical Field
The invention relates to the technical field of open channel flow measurement, in particular to a non-full pipe integrated flow measurement device and method.
Background
The open channel flow monitoring data are important parameters in actual production and life, in the prior art, the functions of equipment applied to the automatic monitoring control of the open channel are too single, the integration level is low, the measurement accuracy is low, the completion of one project can be simply measured by matching with a plurality of equipment, so that the project cost is increased, the installation and the debugging are very complicated, a large amount of space is occupied in deployment, the accessories are more, the maintenance is very inconvenient, and in addition, the installation of excessive equipment can also bring the problems of complex system wiring and reliability in use.
Therefore, in order to solve the above-mentioned problems, it is necessary to provide a flow measurement device and method with a small flow rate, which can measure the flow rate of an open channel, accurately measure the liquid level of the open channel, and improve the measurement accuracy of a small flow rate.
Disclosure of Invention
The invention aims to provide a full-pipe integrated flow measurement device and method, which are used for solving the problems that the existing open channel flow measurement equipment can only be used for full-pipe flow measurement, and is single in function and low in integration level.
In order to achieve the above purpose, the technical scheme of the invention is as follows:
The utility model provides a not full pipe integration current measuring device, includes flow measurement module, liquid level measurement module, device box and controller, flow measurement module set up in device box both sides are used for measuring the velocity of flow value signal of the interior rivers of device box, liquid level measurement module sets up device box delivery port department is used for measuring the liquid level value signal of the interior rivers of device box, the controller is connected with flow measurement module, liquid level measurement module respectively for calculate the rivers flow through the box according to velocity of flow value signal, the liquid level value signal that obtains.
Preferably, the flow measurement module comprises a transducer mounting plate and a transducer, wherein the transducer mounting plate is arranged at one end of two side plates of the device box body, and the transducer is embedded in the transducer mounting plate.
Preferably, the transducers are close to the bottom end of the transducer mounting plate in a dense arrangement mode, and the transducers are close to the top end of the transducer mounting plate in a sparse arrangement mode.
Preferably, the liquid level measurement module comprises an ultrasonic ranging sensor module and a capacitive liquid level sensor module, and the controller is connected with the current measuring sensor module, the ultrasonic ranging sensor module and the capacitive liquid level sensor module through 485 buses.
Preferably, the device box body is a square box body, a water inlet pouring sheet and a water outlet pouring sheet are arranged in front and back, and a fishbone water passing port is arranged on the pouring sheet.
A measurement and control method of a non-full pipe integrated flow measurement and control device comprises the following steps:
Installing the non-full pipe integrated flow measuring device in an open channel to be measured;
Judging whether the collection is needed or not by judging whether the flow rate or the water state exists or not, and switching the controller in a low-power consumption mode and an awakening mode;
Judging the conditions of small flow and siltation, and comprehensively processing the signals of the transducers so as to monitor the flow velocity value of the liquid flow of the tank body of the device in real time;
The controller records and processes the acquired flow velocity value and liquid level value signals, and then uploads data to the cloud end through the wireless communication module.
Preferably, the method further comprises the following steps:
The controller collects flow data in real time and stores the flow data in time under the condition of water flow, and then reports the flow data once in T1 time, and the controller reports the flow data once in T2 time under the condition of no water flow in a low-power consumption mode;
And the fitting relation Q=H.W.V of the liquid level, the flow rate and the flow rate arranged in the controller is H, H is the liquid level height, W is the width, V is the average flow rate of the cross section, and when the controller reads the liquid level and the flow rate value, the real-time flow rate is calculated through the fitting relation.
Preferably, the calculating the real-time flow through the fitting relation further comprises the steps of making a fitting curve into 3 sections of linear verification, wherein Y=A (X-B), X represents the measured linear velocity, Y is the fitted cross-sectional surface velocity, A, B is a coefficient;
under different speeds V1, V2 and V3, A1\B1, A2\B2 and A3\B3 are corresponding, and different fitting formulas are selected in different speed areas ([ 0, V1], [ V1, V2], [ V2 and V3 ]), so that speed correction is achieved;
preferably, the correction of the liquid level further comprises zero calibration and full scale calibration of the two liquid levels, the liquid level area [ Hmin, hmax ] is obtained through the signal condition of the flow measuring sensor, meanwhile, the non-contact liquid level H1 and the contact liquid level H2 are measured, whether the liquid level is normal or not is judged, and the final liquid level H value is determined.
Compared with the prior art, the invention has the following advantages:
1. The intelligent reporting method is adopted, the acquisition frequency is quickened and the reporting interval time is shortened under the condition of water flow, and the acquisition frequency is reduced or the reporting interval time is not acquired and is increased under the condition of no water flow.
2. According to the invention, the transducer mounting plates are arranged on two sides of the device box body, and the transducers are arranged on the transducer mounting plates, so that the accuracy of flow measurement under low liquid level and low flow is improved by adopting a low-density high-sparse arrangement mode.
3. The invention integrates liquid level measurement and flow velocity measurement to form an integrated flow measuring device, and has the characteristics of small occupied volume, convenient installation and disassembly, long service life and the like.
4. The invention transmits the acquired flow velocity value and liquid level value signals to the controller, wherein the fitting relation Q=H.W.V of the liquid level, the flow velocity and the flow rate arranged in the controller, H is the liquid level height, W is the width, V is the average flow velocity of the cross section, and when the controller reads the liquid level and the flow velocity values, the real-time flow is calculated through the fitting relation, so that a full-scale flow measurement mode is formed, and the method is accurate and reliable.
5. According to the invention, the liquid level measuring module is arranged in the water pouring sheet cavity of the water outlet of the square box body, and the water pouring sheet is provided with the fishbone water passing opening, so that the anti-blocking capacity is improved.
Drawings
FIG. 1 is a block diagram of a non-full pipe integrated flow measuring device in the present invention;
FIG. 2 is a layout view of a transducer of the integrated flow measuring device of FIG. 1;
FIG. 3 is an electrical connection diagram of the integrated flow measuring device of FIG. 1;
reference numerals illustrate:
1-water inlet backflow sheet, 2-square box, 3-flow measurement module, 4-transducer, 5-liquid level measurement module, 6-water outlet pouring sheet cavity, 7-water outlet pouring sheet, 8-controller, 9-transparent protection cover.
Detailed Description
The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiment is a module embodiment of the present invention, but not all embodiments, and all other embodiments obtained by those skilled in the art without making any inventive effort based on the embodiments in the present invention are included in the scope of protection of the present invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
As shown in FIG. 1, the embodiment provides an integrated flow measuring device of a non-full pipe, which comprises a water inlet backflow sheet 1, a square box body 2, a flow measuring module 3, a transducer 4, a liquid level measuring module 5, a water outlet pouring sheet cavity 6, a water outlet pouring sheet 7, a controller 8 and a transparent protection cover 9, wherein the water inlet backflow sheet 1 is fixedly connected with the front end of the square box body 2 through screws and is used for enabling water flow to stably flow into the square box body 2, the water outlet pouring sheet 7 is fixed at the rear end of the square box body 2 through screws, the water outlet pouring sheet 7 is provided with a pouring fishbone water gap for preventing sediment accumulation, the liquid level measuring module 5 is arranged in the water outlet pouring sheet cavity 6, the liquid level measuring module 5 adopts a contact type capacitance liquid level measuring method and a non-contact type ultrasonic measuring method for redundancy design, the combination measurement is adopted, the two sides of a notch on the inner side of the square box body 2 are nested with a plurality of transducers through screws and are used for enabling water flow to stably flow to flow into the square box body 2, the square protection cover 4 is mounted on a mounting plate through screws, a clamping hole is formed in the top end of the square box body 2 and is provided with a controller 8 and is used for preventing sediment accumulation, and the controller 8 is used for preventing the liquid level measuring module 8 from being damaged, and the controller 8 is used for controlling the flow measuring module from being used for collecting and being damaged.
As shown in fig. 2, in the integrated flow measuring device with a pipe, disclosed in the embodiment, a plurality of layers of transducers 4 are arranged on the transducer mounting plate, the arrangement intervals of the transducers 4 are different, wherein the interval L0 is equal to or less than L1 is equal to or less than L2 is equal to or less than L3 is equal to or less than L5 is equal to or less than L6, the interval near the bottom is smaller than the interval near the top, and the transducers 4 can improve the accuracy of small flow measurement in a low-density and high-sparse arrangement mode.
As shown in FIG. 3, in the discontinuous pipe integrated flow measuring device disclosed in the embodiment, the controller is connected with a solar panel, a lithium battery, the controller, a flow measuring sensor module, an ultrasonic ranging sensor module, a capacitance liquid level sensor module, a wireless communication module and a GPRS module, the controller is connected with the flow measuring sensor module, the ultrasonic ranging sensor module and the capacitance liquid level sensor module through 485 buses, a controllable power supply is adopted to supply power to each module to play a role of reducing power consumption, the solar panel and the lithium battery are connected with the controller to supply power to the controller, the controller is integrated with the wireless module and the GPRS module, and the wireless module adopts a Lora wireless scheme and can realize a remote wireless monitoring function by transmitting equipment data through Lora or GPRS.
The invention relates to a method for measuring flow integrally without filling pipes, which comprises the following steps:
The method comprises the steps of fixing a square box body at a certain position of an open channel, installing all parts including a controller, judging the flow and the sedimentation condition by a bottom transducer, comprehensively processing transducer signals, monitoring the flow velocity value of the liquid of the square box body in real time, transmitting the collected flow velocity value and liquid level value signals to the controller by a liquid level measuring module, calculating real-time flow in the controller through a formula, judging whether the flow velocity or the water condition exists by the controller, judging whether the collection is needed or not by the controller, and accordingly switching the controller between a low-power consumption mode and a wake-up mode to save power consumption, collecting flow data in real time by the controller in the wake-up mode under the water condition, storing the flow data in time, and reporting the data once in time by T1, for example for 1h-3h, reporting the data once in time by the controller in the time of T2 under the no water condition, for example for 6-10h, and saving power consumption.
Further, in the method for measuring flow with integration of a fluid level and a method for obtaining flow disclosed in the embodiments, the method for obtaining the fluid level and the method for obtaining the flow are disclosed. For example, the method comprises the steps of carrying out 3-section linear verification on a fitting curve aiming at actual conditions, wherein Y=A (X-B), Y represents measured linear velocity, Y represents fitted cross-sectional surface velocity, at different velocities V1, V2 and V3, A1\B1, A2\B2 and A3\B3 are corresponding, and by selecting different fitting formulas in different velocity areas ([ 0, V1], [ V1, V2], [ V2, V3 ]) to achieve velocity correction, carrying out zero calibration and full range calibration on two liquid levels to ensure accuracy and precision of independent measurement, but carrying out data integration and mutual verification by adopting two ways and a flow measuring sensor due to unstable fluctuation of water flow in the application site, obtaining a liquid level approximate area [ Hmin, hmax ] through the signal condition of the flow measuring sensor, simultaneously measuring non-contact H1 and a liquid level H2, judging whether the liquid level and the liquid level value can be obtained by analyzing the liquid level value of [ H1, H2 ], [ H=H 2] and the liquid level value of the cross section H+Hmax ] through software, and the like.
It should be noted that the above embodiments are merely for illustrating the technical solution of the present invention, and not for limiting the same, and although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the technical solution described in the above embodiments may be modified or all technical features of the modules may be equivalently replaced, and the modification or replacement does not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the present invention.
Claims (3)
1. The integrated flow measuring device is characterized by comprising a flow measuring module, a liquid level measuring module, a device box body and a controller, wherein the flow measuring module is arranged on two sides of the device box body and is used for measuring flow velocity value signals of water flow in the device box body, the liquid level measuring module is arranged at a water outlet of the device box body and is used for measuring liquid level value signals of the water flow in the device box body, and the controller is respectively connected with the flow measuring module and the liquid level measuring module and is used for calculating the flow rate of the water flow passing through the box body according to the acquired flow velocity value signals and the liquid level value signals;
The flow measurement module comprises a transducer mounting plate and a transducer, wherein the transducer mounting plate is arranged at one end of two side plates of the device box body, and the transducer is embedded in the transducer mounting plate;
The transducers are close to the bottom end of the transducer mounting plate in a dense arrangement mode, and the transducers are close to the top end of the transducer mounting plate in a sparse arrangement mode;
The energy converter mounting plate is provided with a plurality of layers of energy converters, the arrangement intervals of the energy converters are different, wherein the interval L0 is more than or equal to L1, less than or equal to L2, less than or equal to L3, less than or equal to L4, less than or equal to L5 and less than or equal to L6, and the interval near the bottom is smaller than the interval near the top;
Wherein a plurality of transducer mounting plates are nested at two sides of a groove opening at the inner side of the device box body through screws, the transducers are mounted on the mounting plates through screws, the top end of the device box body is provided with a square hole groove, the controller is installed through a buckle, and the controller is respectively and electrically connected with the flow measurement module and the liquid level measurement module;
The liquid level measurement module comprises an ultrasonic ranging sensor module and a capacitance liquid level sensor module, and the controller is connected with the current measuring sensor module, the ultrasonic ranging sensor module and the capacitance liquid level sensor module through 485 buses;
The liquid level measuring module adopts a contact type capacitance liquid level measuring method and a non-contact type ultrasonic measuring method for redundant design and combined measurement;
The controller is connected with the solar panel, the lithium battery, the controller, the current measuring sensor module, the ultrasonic ranging sensor module, the capacitive liquid level sensor module, the wireless communication module and the GPRS module, and is connected with the current measuring sensor module, the ultrasonic ranging sensor module and the capacitive liquid level sensor module through 485 buses and adopts a controllable power supply to supply power to the modules;
The device box body is a square box body, a water inlet pouring sheet and a water outlet pouring sheet are arranged in front and back, and a fishbone water inlet is arranged on the pouring sheet;
The non-full pipe integrated flow measuring device further comprises a water outlet pouring sheet cavity and a transparent protective cover, wherein the transparent protective cover is arranged outside the controller;
The water inlet backflow piece is fixedly connected with the front end of the device box body through screws, the water outlet pouring piece is fixed at the rear end of the device box body through screws, a fishbone water pouring port is formed in the water outlet pouring piece, and the liquid level measuring module is arranged in a cavity of the water outlet pouring piece.
2. A method of measuring and controlling a fluid-measuring device integrated with a fluid-measuring pipe according to claim 1, comprising the steps of:
Installing the non-full pipe integrated flow measuring device in an open channel to be measured;
Judging whether the collection is needed or not by judging whether the flow rate or the water state exists or not, and switching the controller in a low-power consumption mode and an awakening mode;
Judging the conditions of small flow and siltation, and comprehensively processing the signals of the transducers so as to monitor the flow velocity value of the liquid flow of the tank body of the device in real time;
the fitting relation Q=H.W.V of the liquid level, the flow rate and the flow rate adopted by the controller, H is the liquid level height, W is the width, V is the average flow rate of the cross section, Q is the flow rate, and when the controller reads the liquid level and the flow rate values, the real-time flow rate is calculated through the fitting relation;
The real-time flow is calculated through the fitting relation, and further comprises the steps of making a fitting curve into 3 sections of linear verification, wherein Y=A (X-B), X represents the measured linear velocity, Y is the fitted cross-section surface velocity, and A, B is a coefficient;
under different speeds V1, V2 and V3, A1\B1, A2\B2 and A3\B3 are corresponding, and different fitting formulas are selected in different speed areas ([ 0, V1], [ V1, V2], [ V2 and V3 ]), so that speed correction is achieved;
the correction of the liquid level further comprises zero point calibration and full range calibration of the two liquid levels, a liquid level area [ Hmin, hmax ] is obtained through the signal condition of the flow measurement sensor, meanwhile, a non-contact liquid level H1 and a contact liquid level H2 are measured, whether the liquid level is normal or not is judged, and a final liquid level H value is determined;
finally, obtaining flow through Q=H;
The controller records and processes the acquired flow velocity value and liquid level value signals, and then uploads data to the cloud end through the wireless communication module.
3. The measurement and control method of the non-full pipe integrated flow measurement and control device according to claim 2, further comprising the steps of:
The controller collects flow data in real time in an awake mode under the condition of water flow, stores the flow data in time and reports the flow data once in T1 time, and reports the flow data once in T2 time in a low-power consumption mode under the condition of no water flow.
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| CN110987126A (en) * | 2019-12-27 | 2020-04-10 | 武汉新烽光电股份有限公司 | A pipeline flow measurement method, system and storage medium thereof |
| CN112539788A (en) * | 2020-12-15 | 2021-03-23 | 宁夏回族自治区水利科学研究院 | Full channel wide flowmeter |
| CN112683360A (en) * | 2020-12-22 | 2021-04-20 | 苏州简管家物联技术有限公司 | Method for switching working modes of liquid level detection equipment |
| CN113063469A (en) * | 2021-04-22 | 2021-07-02 | 汇中仪表股份有限公司 | Open channel ultrasonic flowmeter |
| CN113670391B (en) * | 2021-09-22 | 2024-02-09 | 北京奥特美克科技股份有限公司 | Intelligent flow measurement system and demodulation method for river channel and open channel |
| CN115290146B (en) * | 2022-10-09 | 2022-12-06 | 承德华文水利工程有限公司 | Remote online monitoring method for water resource monitoring |
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