Method and device for correcting influence of sediment concentration on precision of open channel flow measurement and storage medium

Abstract

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.

Description

TECHNICAL FIELD

[0001] The present disclosure belongs to the technical field of water measurement, and particularly relates to a method and device for correcting the influence of sediment concentration on the accuracy of open channel flow measurement and a storage medium. BACKGROUND

[0002] Open channel flow measurement (also known as flow measurement) is one of the important tasks in the water conservancy industry, and achieving accurate measurement of open channel flow has been one of the goals pursued by relevant workers. With the continuous development of measurement technology, a series of high-precision and automated flow measurement devices have emerged, greatly improving the accuracy and automation level of open channel flow measurement.

[0003] However, the flow measurement algorithms of flow measurement devices are usually calibrated and established under clear water conditions. The presence of sediment in sediment-laden water flow not only changes the physical and flow characteristics of the water flow, thereby causing the sediment-laden water flow to differ from the clear water flow and affecting the effectiveness and accuracy of the flow measurement algorithm, but also can have adverse effects on the measurement of the flow measurement device itself, thereby reducing the flow measurement accuracy. Therefore, it is necessary to quantitatively study the influence of sediment concentration on the flow measurement accuracy of the flow measurement device and propose a correction method to correct the influence of sediment concentration to improve the accuracy of the device in sediment-laden water flow measurement. However, there is still a lack of research related to this. Existing research mainly focuses on the flow measurement accuracy of the device under clear water conditions, and only in recent years has begun to focus on the potential impact of sediment (or impurities in water) on device flow measurement.

[0004] Overall, existing research on the influence of sediment concentration on the measurement accuracy of flow measurement devices mainly focuses on full-pipe flow in pipe flow, while there is a lack of research on open channel flow, which is more common in the water conservancy industry. Compared with full-pipe flow in pipe flow, the presence of free water surface in open channel flow makes open channel flow measurement more complex than pipe flow: the flow area of full-pipe flow in pipe flow is constant, while the flow area of open channel flow with free water surface changes with the change in water surface height, increasing the uncertainty of flow measurement accuracy and making the mechanism of the influence of sediment concentration on flow measurement accuracy more complex.

[0005] It is worth noting that whether it is full-pipe flow in pipe flow or more complex open channel flow with free water surface, existing research is still limited to quantitatively evaluating the influence of sediment concentration on flow measurement accuracy, and has not yet involved methods for correcting the influence of sediment concentration on flow measurement accuracy. Compared with quantitatively evaluating the influence of sediment concentration on flow measurement accuracy, methods for correcting the influence of sediment concentration on flow measurement accuracy are more practical and helpful in improving the accuracy and adaptability of flow measurement devices in sediment-laden water flow measurement. SUMMARY

[0006] The present disclosure aims to at least partially solve one of the technical problems in the related art.

[0007] To this end, the method for correcting the influence of sediment concentration on the flow measurement accuracy of the open channel provided by the first aspect of the present disclosure fills the gap in the existing research, thereby improving the accuracy and adaptability of the open channel flow measurement device in sediment-laden water flow measurement. The method has the advantages of simple operation, easy application, and good popularization and application prospect.

[0008] To achieve the above object, the first aspect of the present disclosure adopts the following technical solution:

[0009] The method for correcting the influence of sediment concentration on the flow measurement accuracy of the open channel provided by the first aspect of the present disclosure comprises:

[0010] For a given sediment particle size, the flow of the reference flow measurement device and the open channel flow measurement device to be detected is measured synchronously under different flow conditions, and the parameters of the flow conditions include at least the sediment concentration. The flow measurement accuracy of the reference flow measurement device is less affected by the sediment concentration than the open channel flow measurement device.

[0011] The flow measurement value of the reference flow measurement device is approximated as the true value, and the flow measurement value of the open channel flow measurement device is divided to calculate the flow correction coefficient of the open channel flow measurement device under different flow conditions.

[0012] The function expression of the flow correction coefficient is fitted with the parameters of the flow conditions as the independent variables.

[0013] In flow practice, the parameters of the flow conditions of the water body to be measured are substituted into the function expression of the flow correction coefficient to obtain the flow correction coefficient under the practical flow conditions. The flow measurement value of the open channel flow measurement device is multiplied by the flow correction coefficient under the practical flow conditions to obtain the flow correction value of the open channel flow measurement device.

[0014] In some embodiments, the parameters of the flow conditions also include the water depth.

[0015] In some embodiments, the sediment concentration level involved in the synchronous measurement is not less than 3 levels and covers the sediment concentration range of the flow practice, and the water depth level involved in the synchronous measurement is not less than 3 levels and covers the water depth range of the flow practice.

[0016] In some embodiments, when considering multiple parameters of the flow conditions as independent variables at the same time, the function expression of the flow correction coefficient is expressed in the form of the product of the polynomial functions of the independent variables in sequence.

[0017] In some embodiments, when only considering the sediment concentration as the independent variable, the function expression of the flow correction coefficient is expressed in the form of the polynomial function of the sediment concentration.

[0018] In some embodiments, the sediment particle size used in the synchronization ratio measurement should be the same or close to the sediment particle size in the flow measurement practice.

[0019] In some embodiments, the reference flow measurement device adopts a pipe electromagnetic flowmeter.

[0020] The method for correcting the influence of sediment concentration on the accuracy of open channel flow measurement provided by the first aspect of the embodiments of the present disclosure has the following characteristics and beneficial effects:

[0021] 1. Simple operation: only 3 levels of sediment concentration and 3 levels of water depth are needed to carry out the flow synchronization ratio measurement to fit the expression of the flow correction coefficient.

[0022] 2. Easy to apply: based on the sediment concentration and water depth of the flow measurement conditions, even only the sediment concentration, the flow measurement value can be corrected.

[0023] 3. The method can effectively improve the accuracy and adaptability of the open channel flow measurement device in the flow measurement of sediment-laden water, and has good application prospect.

[0024] Additional aspects and advantages of the present application will be partially given in the following description, partially will become obvious from the following description, or will be understood by the practice of the present application.

[0025] The device for correcting the influence of sediment concentration on the accuracy of open channel flow measurement provided by the second aspect of the embodiments of the present disclosure comprises:

[0026] The first module is configured to perform flow synchronization ratio measurement on the reference flow measurement device and the open channel flow measurement device to be detected under different flow measurement conditions for a given sediment particle size, wherein the parameters of the flow measurement conditions at least include sediment concentration, and the flow measurement accuracy of the reference flow measurement device is less affected by the sediment concentration than the open channel flow measurement device.

[0027] The second module is configured to approximate the flow measurement value of the reference flow measurement device as the true value of flow, divide the flow measurement value of the open channel flow measurement device, and calculate the flow correction coefficient of the open channel flow measurement device under different flow measurement conditions.

[0028] The third module is configured to fit the function expression of the flow correction coefficient with the parameters of the flow measurement conditions as the independent variable.

[0029] The fourth module is configured to substitute the parameters of the flow measurement conditions of the water body to be detected into the function expression of the flow correction coefficient to obtain the flow correction coefficient under the practical flow measurement conditions, multiply the flow measurement value of the open channel flow measurement device by the flow correction coefficient under the practical flow measurement conditions, and obtain the flow correction value of the open channel flow measurement device.

[0030] In some embodiments, the parameters of the flow measurement conditions further include water depth.

[0031] A computer readable storage medium is provided in the third aspect of the present disclosure, and the computer readable storage medium stores computer instructions for causing the computer to execute the method for correcting the influence of sediment concentration on the flow measurement accuracy of an open channel according to any one of the first aspect of the present disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is a flowchart of the method for correcting the influence of sediment concentration on the flow measurement accuracy of an open channel according to the first aspect of the present disclosure.

[0033] Figure 2 is a schematic diagram of the change of the flow correction coefficient of a certain open channel flow measurement device with sediment concentration according to the present disclosure.

[0034] Figure 3 is a schematic diagram of the comparison of the flow measurement errors before and after correction of a certain open channel flow measurement device according to the present disclosure.

[0035] Figure 4 is a schematic diagram of the structure of an electronic device according to the third aspect of the present disclosure. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application.

[0037] On the contrary, the present application covers any alternative, modification, equivalent method and solution defined by the claims, which is within the spirit and scope of the present application. Further, in order to make the public better understand the present application, some specific details are described in the following detailed description of the present application. The present application can also be completely understood without the description of these details by those skilled in the art.

[0038] As shown in Figure 1 the method for correcting the influence of sediment concentration on the flow measurement accuracy of an open channel according to the first aspect of the present disclosure includes the following steps:

[0039] (1) For a given sediment particle size, the flow of a reference flow measurement device and a to-be-tested open channel flow measurement device is synchronously measured under different flow conditions, and the parameters of the flow conditions include at least sediment concentration S. The flow measurement accuracy of the reference flow measurement device is less affected by sediment concentration than that of the open channel flow measurement device.

[0040] (2) The flow measurement value of the reference flow measurement device is approximated as the true value of flow Q r , and divided by the flow measurement value Q mCalculate the flow correction factor K for the open channel flow measurement device under different flow measurement conditions. c =Q r / Q m ;

[0041] (3) Using the parameters of the flow measurement conditions as independent variables, the functional expression of the flow correction coefficient is obtained by fitting.

[0042] (4) In flow measurement practice, substitute the parameters of the flow measurement conditions of the water body to be measured into the function expression of the flow correction coefficient. Calculate the flow correction factor under practical flow measurement conditions. The measured flow rate Q of the open channel flow measurement equipment to be tested mp Multiply by the flow correction factor under actual flow measurement conditions The flow correction value of the open channel flow measurement equipment can then be obtained.

[0043] In some embodiments, the parameters of the flow measurement conditions also include water depth.

[0044] In some embodiments, the simultaneous comparative measurement involves a sediment concentration level of not less than 3 and covers the sediment concentration range of the flow measurement practice, and the simultaneous comparative measurement involves a water depth level of not less than 3 and covers the water depth range of the flow measurement practice.

[0045] In some embodiments, a functional expression for the flow correction coefficient is obtained by fitting. When multiple parameters of the flow measurement conditions (such as sediment concentration S and water depth H) are considered as independent variables, the functional expression of the flow correction coefficient is as follows: Expressed as a product of independent variable polynomial functions (e.g.) ).

[0046] In some embodiments, a functional expression for the flow correction coefficient is obtained by fitting. When the flow correction coefficient is insensitive to other flow measurement parameters besides sediment concentration, and only sediment concentration is considered as the independent variable, the functional expression of the flow correction coefficient is... Expressed as a polynomial function of sediment content

[0047] In some embodiments, the sediment particle size used in the synchronous comparison should be the same as or close to the sediment particle size in the flow measurement practice to ensure the application effect of the established flow correction function expression.

[0048] In some embodiments, the reference flow measurement device is a pipeline electromagnetic flowmeter.

[0049] The specific steps of a particular embodiment of this disclosure are described below:

[0050] (1) Using the well-known pipeline electromagnetic flowmeter, whose flow measurement accuracy is not easily affected by sediment, as the benchmark flow measurement device, a synchronous flow ratio test was carried out on the open channel flow measurement device of the embodiment with 4 levels of sediment content and 5 levels of water depth, totaling 20 data points.

[0051] (2) The flow measurement value of the pipeline electromagnetic flowmeter, a reference flow measurement device, is taken as the true flow value Q. r Divide by the flow measurement value Q of the open channel flow measurement equipment m Obtain the flow correction coefficient K of the open channel flow measurement equipment under different sediment concentrations and water depths. c =Q r / Q m There are a total of 20 data points.

[0052] (3) Flow correction coefficient K in the example c Since it is not sensitive to water depth, K can be fitted using only the sediment content S as the independent variable. c Regarding the functional expression for the sediment concentration S, fitting can be performed using a first-order, second-order (or higher-order) function, or other forms of function. After testing, a second-order function is sufficient to meet the requirements. For the sake of simplicity, a second-order function is ultimately used for fitting. In the formula k s1 k s2 and k s3 The coefficients for each term are given, and the unit of sediment content S is kg / m³. 3 The functional expression for the flow correction coefficient obtained by fitting in this embodiment is: See details Figure 2 .

[0053] (4) In flow measurement practice, for the open channel flow measurement equipment in the example, the sediment content of the water body to be measured is substituted into the data. The expression is used to obtain the flow correction factor under the flow measurement condition. Multiply by the measured flow rate Q of the open channel flow measurement device in this embodiment. mp You can then obtain the flow correction value.

[0054] To test The correction effect is achieved by substituting the sand content S value into the equation. The expression yields the flow correction coefficient for the corresponding sediment concentration. The coefficient is used to measure the original flow rate Q. m The corrected value is obtained by making the correction. The flow correction value Q c With the true value of traffic Q r Compare and calculate the corrected flow measurement deviation. and the deviation from the flow measurement before correction A comparison was made, and the results can be found in [link to comparison].Figure 3 It can be seen that the flow measurement deviation δQ before correction is relatively large (up to ±12%), and shows a clear trend of increasing with increasing sediment content. The correction, the corrected flow measurement deviation δQ c The flow rate correction coefficient decreased significantly (within ±4%), and with the increase of sediment content, the flow rate measurement deviation no longer showed a trend change, indicating that the fitted flow rate correction coefficient was effective. The correction effect is good, effectively improving the flow measurement accuracy of the equipment under sediment-laden conditions and eliminating the trend influence of sediment concentration on flow measurement accuracy. The verification of the correction effect fully demonstrates the effectiveness of the method proposed in this embodiment for correcting the influence of sediment concentration on the flow measurement accuracy of open channels, even in the expression of the flow correction coefficient function. It can still provide a good correction effect even without considering water depth variables.

[0055] The apparatus for correcting the influence of sediment concentration on the accuracy of open channel flow measurement provided in the second aspect of this disclosure includes:

[0056] The first module is used to synchronously compare the flow rates of a benchmark flow measurement device and a flow measurement device in an open channel under different flow measurement conditions for a given sediment particle size. The parameters of the flow measurement conditions include at least the sediment content. The flow measurement accuracy of the benchmark flow measurement device is less affected by the sediment content than that of the open channel flow measurement device.

[0057] The second module is used to approximate the flow measurement value of the reference flow measurement device as the true flow value, divide it by the flow measurement value of the open channel flow measurement device, and calculate the flow correction coefficient of the open channel flow measurement device under different flow measurement conditions.

[0058] The third module is used to fit a functional expression for the flow correction coefficient using the parameters of the flow measurement conditions as independent variables.

[0059] The fourth module is used to substitute the parameters of the flow measurement conditions of the water body to be measured into the function expression of the flow correction coefficient to obtain the flow correction coefficient under the actual flow measurement conditions, and multiply the measured flow value of the open channel flow measurement device by the flow correction coefficient under the actual flow measurement conditions to obtain the flow correction value of the open channel flow measurement device.

[0060] In some embodiments, the parameters of the flow measurement conditions may also include water depth.

[0061] To implement the above embodiments, this disclosure also proposes a computer-readable storage medium storing a computer program that is executed by a processor to perform the method for correcting the flow measurement accuracy of an open channel flow measurement device provided in the first aspect of this disclosure.

[0062] The following is for reference. Figure 4FIG. 1 shows a structural diagram of an electronic device according to an embodiment of the present disclosure. The electronic device shown in FIG. 1 is merely an example and should not impose any limitation on the function and use range of the embodiments of the present disclosure. Figure 4 The electronic device shown in FIG. 1 is merely an example and should not impose any limitation on the function and use range of the embodiments of the present disclosure.

[0063] As shown in FIG. 1, the electronic device can include a processing device (e.g., a central processing unit, a graphic processing unit, etc.) 101, which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 102 or a program loaded from a storage device 108 into a random access memory (RAM) 103. In the RAM 103, various programs and data required for the operation of the electronic device are also stored. The processing device 101, the ROM 102, and the RAM 103 are connected to each other through a bus 104. An input / output (I / O) interface 105 is also connected to the bus 104. Figure 4

[0064] Generally, the following devices can be connected to the I / O interface 105: input devices 106 including, for example, a touch screen, a touch pad, a keyboard, a mouse, a camera, a microphone, etc.; output devices 107 including, for example, a liquid crystal display (LCD), a speaker, a vibrator, etc.; storage devices 108 including, for example, a magnetic tape, a hard disk, etc.; and communication devices 109. The communication devices 109 can allow the electronic device to communicate with other devices wirelessly or by wire to exchange data. Although Figure 4 The electronic device shown in FIG. 1 has various devices, but it should be understood that all the devices shown are not required to be implemented or possessed. More or fewer devices can be alternatively implemented or possessed.

[0065] In particular, according to the embodiments of the present disclosure, the processes described above with reference to the flowcharts can be implemented as a computer software program. For example, the embodiments include a computer program product including a computer program carried on a computer readable medium, the computer program containing program codes for executing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network through the communication devices 109, or installed from the storage devices 108, or installed from the ROM 102. When the computer program is executed by the processing device 101, the above-mentioned functions defined in the methods of the embodiments of the present disclosure are performed.

[0066] ​It should be noted that the computer-readable medium described above can be a computer-readable signal medium or a computer-readable storage medium or any combination thereof. The computer-readable storage medium can be, for example but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus or device, or any suitable combination of the foregoing. More specific examples of the computer-readable storage medium can include, but are not limited to, an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or Flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the disclosure, the computer-readable storage medium can be any tangible medium that contains or stores a program used by or in connection with an instruction execution system, apparatus or device. In the disclosure, the computer-readable signal medium can include a data signal propagated in baseband or as part of a carrier wave, in which a computer-readable program code is carried. Such a propagated data signal can take any of a variety of forms, including but not limited to electro-magnetic, optical, or any suitable combination thereof. The computer-readable signal medium can also be any computer-readable medium that is not a storage medium and that can communicate, propagate or transport a program for use by or in connection with an instruction execution system, apparatus or device. The program code contained in the computer-readable medium can be transmitted using any suitable medium, including but not limited to wire, cable, optical fiber, RF, etc., or any suitable combination of the foregoing.

[0067] The computer-readable medium described above can be included in the electronic device described above; or can exist separately from the electronic device and be not assembled into the electronic device.

[0068] The computer readable medium carries one or more programs when the one or more programs are executed by the electronic device, so that the electronic device: for a given sediment particle size, under different flow conditions, the flow of the reference flow measuring device and the open channel flow measuring device to be detected is synchronized and compared, the parameters of the flow conditions include at least sediment concentration, and the flow measuring accuracy of the reference flow measuring device is less affected by the sediment concentration than the open channel flow measuring device; the flow measurement value of the reference flow measuring device is approximated as the true value, and the flow measurement value of the open channel flow measuring device is divided to calculate the flow correction coefficient of the open channel flow measuring device under different flow conditions; the parameters of the flow conditions are used as independent variables to fit the function expression of the flow correction coefficient; in flow practice, the parameters of the flow conditions of the water body to be measured are substituted into the function expression of the flow correction coefficient to obtain the flow correction coefficient under the practical flow conditions, and the flow measurement value of the open channel flow measuring device is multiplied by the flow correction coefficient under the practical flow conditions to obtain the flow correction value of the open channel flow measuring device.

[0069] Computer program code for carrying out operations of the present disclosure can be written in one or more programming languages or combinations of languages including object oriented programming languages such as Java, Smalltalk, C++, Python, and conventional procedural programming languages such as "C" or similar programming languages. The program code can execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the latter scenario, the remote computer can be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or the connection can be made to an external computer (for example, through the Internet using an Internet Service Provider).

[0070] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples without contradiction.

[0071] Moreover, the terms "first", "second", "third", etc. are used herein only to describe different instances, and do not imply or suggest relative importance or a number of indicated technical features. Thus, features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality" is at least two, for example, two, three, etc., unless otherwise explicitly and specifically limited.

[0072] Any process or method descriptions or blocks in flow charts herein, and elsewhere, can be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps in the process. Alternate implementations are included within the scope of the preferred embodiments of the present application in which additional functionality can be added or some functionality can be removed, by, for example, adding one or more steps performing a similar or reciprocal function, by adding one or more steps performing the same functions, by adding one or more steps performing an alternative or parallel function, by adding one or more steps performing one or more additional functions, or by adding one or more steps performing a different function altogether.

[0073] Logic and / or steps represented in flow charts herein, and elsewhere, can be embodied in computer-readable media, for execution by an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. In this context, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. The computer-readable medium can be a machine-readable storage device (e.g., magnetic, optical, or other) a machine-readable storage diskette (e.g., floppy disk, optical disk, or other), a machine-readable memory (e.g., random access memory, read-only memory, programmable read-only memory, flash memory, or other), a machine-readable propagated signal, and the like, for example. Specific examples (a non-exhaustive list) of the computer-readable medium include the following: a portable computer diskette (magnetic, optical, or other), a RAM, a ROM, an EPROM, a FLASH memory card, a portable CD ROM, digital tape, computer memory, volatile or non-volatile memory, a data cable, a wireless signal, and the like, for example. Of course, the computer-readable medium can even be paper or the like, because the program can be printed thereon, for example.

[0074] It should be understood that parts of the present application can be realized in hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be realized as software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if realized in hardware, and as in another embodiment, any one or a combination of the following technologies known in the art can be used: discrete logic circuitry having logic gates for implementing logic functions on data signals, application specific integrated circuits having appropriate combinational logic gates, programmable gate arrays (PGA), field programmable gate arrays (FPGA), etc.

[0075] Those skilled in the art of the present technology can understand that all or part of the steps carried out by the above-mentioned embodiments can be completed by a program instructing the relevant hardware, and the developed program can be stored in a computer readable storage medium. When the program is executed, it includes one or a combination of the steps of the method embodiments.

[0076] In addition, each functional unit in each embodiment of the present application can be integrated into one processing module, or each unit can exist physically alone, or two or more units can be integrated into one module. The above-mentioned integrated module can be realized in the form of hardware or in the form of a software functional module. The integrated module, if realized in the form of a software functional module and sold or used as an independent product, can also be stored in a computer readable storage medium.

[0077] The above-mentioned storage medium can be a read-only memory, a magnetic disk or an optical disk, etc. Although the embodiments of the present application have been shown and described above, it should be understood that the above-mentioned embodiments are exemplary and cannot be understood as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above-mentioned embodiments within the scope of the present application.

Claims

1. A method for correcting the influence of sediment concentration on the accuracy of open channel flow measurement, characterized in that, The method comprises the following steps: For a given sediment particle size, synchronous comparison of flow rates is performed between a reference flow measuring device and an open channel flow measuring device to be detected under different flow measuring conditions, parameters of the flow measuring conditions at least including sediment concentration, and the flow measuring accuracy of the reference flow measuring device is less susceptible to the sediment concentration than the open channel flow measuring device; A flow measurement value of the reference flow measuring device is approximated as a true value of flow rate, and the flow measurement value of the reference flow measuring device is divided by a flow measurement value of the open channel flow measuring device to calculate a flow correction coefficient of the open channel flow measuring device under different flow measuring conditions; A function expression of the flow correction coefficient is fitted by taking the parameters of the flow measuring conditions as independent variables; In flow measuring practice, the parameters of the flow measuring conditions of a water body to be detected are substituted into the function expression of the flow correction coefficient to obtain a flow correction coefficient under practical flow measuring conditions, and a flow measurement value of the open channel flow measuring device is multiplied by the flow correction coefficient under the practical flow measuring conditions to obtain a flow correction value of the open channel flow measuring device.

2. The method of claim 1, wherein, The parameters of the flow measuring conditions further include water depth.

3. The method of claim 2, wherein, The synchronous comparison involves a sediment concentration level not less than 3 levels and covers a sediment concentration range of flow measuring practice, and the synchronous comparison involves a water depth level not less than 3 levels and covers a water depth range of flow measuring practice.

4. The method of claim 2, wherein, When multiple parameters of the flow measuring conditions are simultaneously taken as independent variables in fitting the function expression of the flow correction coefficient, the function expression of the flow correction coefficient is expressed in the form of a product of polynomial functions of the independent variables in sequence.

5. The method of claim 1, wherein, When only the sediment concentration is taken as an independent variable in fitting the function expression of the flow correction coefficient, the function expression of the flow correction coefficient is expressed in the form of a polynomial function of the sediment concentration.

6. The method of claim 1, wherein, The sediment particle size used in the synchronous comparison should be the same as or close to the sediment particle size in flow measuring practice.

7. The method of claim 1, wherein, The reference flow measuring device adopts a pipeline electromagnetic flowmeter.

8. A device for correcting the influence of sediment concentration on the accuracy of open channel flow measurement, characterized in that, The method comprises the following steps: A first module is configured to perform synchronous comparison of flow rates between a reference flow measuring device and an open channel flow measuring device to be detected under different flow measuring conditions for a given sediment particle size, parameters of the flow measuring conditions at least including sediment concentration, and the flow measuring accuracy of the reference flow measuring device is less susceptible to the sediment concentration than the open channel flow measuring device; A second module is configured to calculate a flow correction coefficient of the open channel flow measuring device under different flow measuring conditions by dividing a flow measurement value of the reference flow measuring device by a flow measurement value of the open channel flow measuring device, with the flow measurement value of the reference flow measuring device being approximated as a true value of flow rate; A third module is configured to fit a function expression of the flow correction coefficient by taking the parameters of the flow measuring conditions as independent variables; A fourth module is configured to substitute the parameters of the flow measuring conditions of a water body to be detected into the function expression of the flow correction coefficient to obtain a flow correction coefficient under practical flow measuring conditions, and multiply a flow measurement value of the open channel flow measuring device by the flow correction coefficient under the practical flow measuring conditions to obtain a flow correction value of the open channel flow measuring device.

9. The apparatus of claim 8, wherein, The parameters of the flow measuring conditions further include water depth.

10. A computer-readable storage medium, characterized in that, The computer readable storage medium stores computer instructions for causing the computer to execute the method for correcting the influence of sediment concentration on the flow measuring accuracy of an open channel according to any one of claims 1-7.

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