Water flow rate determination and comparison measurement method and system considering test error, medium and equipment

Abstract

The invention discloses a test error-considered water flow rate calibration and comparison method, system, medium and equipment. The method comprises the following steps: acquiring actually-measured water flow data measured by a standard hydrological instrument in a river and actually-measured virtual water flow data measured by a hydrological instrument to be measured in the river; establishing a standard water level water flow curve between the river water level and the actually measured water flow data and a virtual water level water flow curve between the river water level and the actually measured virtual water flow data based on a curve relation fitting method; according to the standard water level water flow curve and the virtual water level water flow curve, whether the hydrological instrument to be detected meets the production and use requirements or not is judged. On the basis of the data processing flow, a standard water level-water flow curve and a virtual water level-water flow curve are constructed through curve relation fitting on the basis of measured data, and whether the hydrological instrument to be measured meets the production and use requirements or not is judged according to the consistency of the standard water level-water flow curve and the virtual water level-water flow curve.

Description

Technical Field

[0001] This invention relates to the field of hydrological instrument calibration technology, and in particular to a method, system, medium, and equipment for measuring water flow rate considering measurement errors. Background Technology

[0002] Accurate acquisition of river cross-sectional flow is fundamental to flood control scheduling, water resource management, and ecological regulation. This is typically achieved by establishing a water level-flow curve, allowing for continuous monitoring of water level as a substitute for flow rate. To obtain a "baseline" flow rate for curve construction, standard hydrological measurement equipment with traceable origins is commonly used, such as current meter cross-sectional integration and multiple measurements at the cross-section using a vessel-mounted or moving-boat ADCP. These methods, when operated according to regulations, offer high accuracy and have long been used as a reference.

[0003] In recent years, with the advancement of digital twin watersheds and smart hydrology, multi-source, non-contact, or low-maintenance online monitoring methods have developed rapidly. Examples include surface velocity inversion based on video image processing, surface velocity radar, and various "virtual flow measurement" devices that estimate flow rate in conjunction with water level. These devices typically output "flow rate / velocity calculated from a model," and their values ​​depend on coefficients, extrapolation models, and on-site installation conditions. They exhibit deviations and uncertainties from standard test results, requiring on-site verification and evaluation before deployment.

[0004] Currently, the acceptance testing of hydrological instruments (especially "virtual flow measurement" equipment) before commissioning largely relies on: 1. Parallel comparison with standard equipment: comparing the output flow / velocity of the two devices at the same time under several water level conditions, and calculating the average deviation and standard deviation. 2. Correction coefficients with a small number of measuring points: adjusting the equipment coefficients through a limited number of measurements to ensure that the deviations under certain operating conditions meet the standards.

[0005] However, the above approach has the following shortcomings: parallel comparison measurements can only obtain discrete points under limited operating conditions, which is difficult to cover the full range from low water to flood, resulting in high extrapolation risk; at the same time, simply comparing time series point values ​​is difficult to reflect the consistency of the overall relationship between "water level - flow rate / velocity", and it is impossible to intuitively see the systematic deviation of the hydrological instrument under test in different water level sections; when the water situation changes significantly, the different measurement durations of the two instruments cause the water situation changes to lead to asynchronous flow rate (velocity) and cause deviation, and both flow measurement instruments have random measurement errors.

[0006] Therefore, there is an urgent need for a solution that uses measured data and curve relationships to fit and construct standard water level-flow (flow rate / velocity) curves and "virtual" water level-flow (flow rate / velocity) curves respectively, and determines whether the hydrological instrument under test meets the requirements for commissioning and use based on the consistency of the two curves. Summary of the Invention

[0007] This invention provides a method, system, medium, and equipment for measuring water flow rate considering measurement errors. Based on measured data, a standard water level-flow curve and a "virtual" water level-flow curve are constructed by fitting curve relationships, and the consistency between the two is used to determine whether the hydrological instrument under test meets the requirements for commissioning and use. Firstly, a method for determining the flow rate by a fixed ratio, taking into account measurement errors, is provided, including: Acquire measured flow data from standard hydrological instruments in rivers, and measured virtual flow data from hydrological instruments under test in rivers; A standard water level-flow curve and a virtual water level-flow curve are established between the river water level and the measured water flow data based on the curve relationship fitting method. Based on the standard water level flow curve and the virtual water level flow curve, determine whether the hydrological instrument to be measured meets the requirements for commissioning and use.

[0008] In some embodiments, determining whether the hydrological instrument under test meets the requirements for commissioning and use based on the standard water level flow curve and the virtual water level flow curve includes: Based on the standard water level flow curve and the virtual water level flow curve, the calibration flow coefficient at different river water levels is calculated, and a water level coefficient curve between the river water level and the calibration flow coefficient is established based on the curve relationship fitting method. The online flow data of the hydrological instrument under different river water levels are calculated based on the virtual water level flow curve and the water level coefficient curve, and the online water level flow curve between the river water level and the online flow data is established based on the curve relationship fitting method. Based on the data corresponding to the standard water level flow curve and the online water level flow curve according to a certain gradient of the river water level, and based on the search results, it is determined whether the hydrological instrument to be measured meets the requirements for commissioning and use.

[0009] In some embodiments, the method for calculating the calibration flow coefficient at different river water levels based on the standard water level flow curve and the virtual water level flow curve is shown in the following formula:

[0010] In the formula, K River water level i The corresponding calibration flow coefficient; A ci To determine the river water level in the standard water level flow curve i The corresponding water flow data is below; A si To represent the river water level in the virtual water level flow curve i The corresponding water flow data is below.

[0011] In some embodiments, the method for calculating the online flow data of the hydrological instrument under different river water levels based on the virtual water level flow curve and the water level coefficient curve is shown in the following formula:

[0012] In the formula, A represents the value of the hydrological instrument being measured at the river water level. i The online water flow data below; K i For the river water level in the water level coefficient curve i The corresponding calibration flow coefficient; A si To represent the river water level in the virtual water level flow curve i The corresponding water flow data is below.

[0013] In some embodiments, the step of searching for data corresponding to the standard water level flow curve and the online water level flow curve based on a certain gradient of river water level, and determining whether the hydrological instrument to be measured meets the requirements for commissioning and use based on the search results, includes: Based on searching the standard flow data in the standard water level flow curve at the same water level according to a certain gradient, and the online flow data in the online water level flow curve; Calculate the comparison error between the obtained online water flow data and the standard water flow data; If the measurement error is within the preset range, the hydrological instrument under test is deemed to meet the requirements for commissioning and use.

[0014] In some embodiments, the calculation of the online flow data relative to standard flow data, if the comparison error is within a preset range, determines that the hydrological instrument meets the requirements for commissioning and use, including: Multiple sets of standard water flow data and online water flow data at different water levels were obtained. Calculate the mean error between multiple sets of standard flow data and online flow data; The standard deviation is calculated based on the mean error, and the random uncertainty is calculated based on the standard deviation. If the mean error is less than or equal to the error threshold and the random uncertainty is less than or equal to the uncertainty threshold, then the hydrological instrument under test is determined to meet the requirements for commissioning and use.

[0015] In some embodiments, the curve relationship fitting method includes graphical methods and curve fitting methods.

[0016] Secondly, a water flow rate ratio measurement system that takes into account measurement errors is provided, including: The data acquisition module is used to acquire measured flow data in rivers from standard hydrological instruments and measured virtual flow data in rivers from hydrological instruments under test. A curve establishment module, communicatively connected to the data acquisition module, is used to establish a standard water level-flow curve between the river water level and the measured flow data, and a virtual water level-flow curve between the river water level and the measured virtual flow data, based on a curve relationship fitting method; and, The judgment module is connected in communication with the curve establishment module and is used to determine whether the hydrological instrument under test meets the requirements for commissioning and use based on the standard water level flow curve and the virtual water level flow curve.

[0017] Thirdly, embodiments of the present invention provide a computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the water flow rate ratio measurement method considering the test error as described above.

[0018] Fourthly, embodiments of the present invention provide an electronic device, including a storage medium, a processor, and a computer program stored in the storage medium and executable on the processor, wherein the processor, when executing the computer program, implements the water flow rate ratio measurement method considering the test error as described above.

[0019] Compared with existing technologies, the advantages of this invention are as follows: It acquires measured flow data from a standard hydrological instrument in a river, and measured virtual flow data from a hydrological instrument under test in the river; it establishes a standard water level-flow curve between the river water level and the measured flow data, and a virtual water level-flow curve between the river water level and the measured virtual flow data, based on a curve fitting method; and it determines whether the hydrological instrument under test meets the requirements for commissioning and use based on the standard water level-flow curve and the virtual water level-flow curve. Based on the above data processing flow, this invention constructs a standard water level-flow curve and a "virtual" water level-flow curve based on measured data and curve fitting, and determines whether the hydrological instrument under test meets the requirements for commissioning and use based on the consistency of the two curves. Attached Figure Description

[0020] Figure 1 This is a flowchart illustrating a method for measuring water flow rate by a fixed ratio, taking into account measurement errors, according to the present invention. Figure 2 This is a schematic diagram of the standard water level flow curve and the virtual water level flow curve of the present invention; Figure 3 This is a schematic diagram of the water level coefficient curve of the present invention; Figure 4 This is a schematic diagram of the water level coefficient curve of the present invention and a schematic diagram of the traditional calibration method for calculating the k value; Figure 5This is a schematic diagram of the online water level and flow curve of the present invention; Figure 6 This is a large-section view of the actual measurement site of the present invention. Detailed Implementation

[0021] Referring now to specific embodiments of the invention, examples of which are illustrated in the accompanying drawings. Although the invention will be described in conjunction with specific embodiments, it will be understood that it is not intended to limit the invention to the described embodiments. Rather, it is intended to cover variations, modifications, and equivalents included within the spirit and scope of the invention as defined by the appended claims. It should be noted that the method steps described herein can be implemented by any functional block or functional arrangement, and any functional block or functional arrangement can be implemented as a physical entity or a logical entity, or a combination of both.

[0022] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] Note: The examples described below are merely specific examples and are not intended to limit the embodiments of the present invention to the specific steps, values, conditions, data, order, etc. Those skilled in the art can utilize the concept of the present invention to construct more embodiments not mentioned herein by reading this specification.

[0024] Please see Figure 1 The present invention provides a flowchart of a method for determining the flow rate by considering measurement error. The method of the present invention includes: It should be noted that, as can be seen from the accompanying drawings, the water flow in the following text refers to the flow rate or velocity.

[0025] Step S100: Obtain the measured water flow data in the river from the standard hydrological instrument and the measured virtual water flow data in the river from the hydrological instrument under test; Standard hydrological instruments can be current meters or mobile ADCPs. Flow rates should be measured more than 30 times in a river using a current meter or mobile ADCP, with the measurements evenly distributed across water level levels, and performed when the flow is relatively stable. The measured flow rate Qc and velocity Vc are then compared using the current meter or mobile ADCP.

[0026] The obtained virtual flow data is the "flow-water level" data points obtained by inverting the video footage from the camera image using the video flow measurement method. It is called "virtual" because it is calculated from the image, in contrast to traditional direct flow measurement (ADCP, current meter cross-sectional integration).

[0027] Step S200: Based on the curve relationship fitting method, establish the standard water level-flow curve between the river water level and the measured flow data, and the virtual water level-flow curve between the river water level and the measured virtual flow data. See the curve diagrams below. Figure 2 As shown.

[0028] The established standard water level and flow curves and virtual water level and flow curves are both obtained based on measured data points and then using graphical and curve fitting methods. The relationship line is required to pass through the center of the measured data point group to eliminate measurement errors.

[0029] When establishing a curve relationship, the shape and initial value are usually obtained first using a graphical method, and then the parameters and uncertainty are obtained using a fitting method.

[0030] Graphical method: The measured points are plotted according to appropriate coordinates, and the points are "reasonably connected" with a smooth curve under the premise of satisfying physical constraints.

[0031] Curve fitting method: Select a functional form or non-parametric method, use numerical optimization to minimize the deviation between the curve and the measured points, and give the parameters and uncertainty.

[0032] Therefore, based on the cross-sectional shape characteristics of the site (see details...), Figure 6 (As shown) Determine the initial parameters, segment positions, and overall shape; then use constrained regression to accurately determine the parameters and quantify the uncertainty.

[0033] Step S300: Based on the standard water level flow curve and the virtual water level flow curve, determine whether the hydrological instrument to be measured meets the requirements for commissioning and use, including: S310, Based on the standard water level flow curve and the virtual water level flow curve, calculate the calibration flow coefficient under different river water levels, and establish the water level coefficient curve between the river water level and the calibration flow coefficient based on the curve relationship fitting method; The method for calculating the calibration flow coefficient at different river water levels based on the standard water level flow curve and the virtual water level flow curve is shown in the following formula:

[0034] In the formula, K River water level i The corresponding calibration flow coefficient; A ci To determine the river water level in the standard water level flow curve i The corresponding water flow data is below; A si To represent the river water level in the virtual water level flow curve i The corresponding water flow data is below.

[0035] Specifically, in this embodiment, since the flow rate measured by the current meter is Qc and the flow velocity measured by the mobile ADCP is Vc, if the measured flow rate Qc is selected, the hydrological instrument under test will measure a virtual flow rate Qs. Therefore, the flow coefficient is calibrated using the following formula:

[0036] If the measured flow velocity Vc is selected, the imaginary flow velocity Vs measured by the hydrological instrument will be used. Therefore, the flow coefficient can be calculated using the following formula:

[0037] Finally, a water level coefficient curve between the river water level and the calibrated flow coefficient is established based on the curve fitting method. (See details...) Figure 3 and Figure 4 As shown, the fitting process is as follows: Based on the above formula, the k values ​​for different water levels are calculated. A water level coefficient curve is then established between the river water level and the calibrated flow coefficient using a curve fitting method. If the cross-sectional shape varies significantly and the water level coefficient distribution is not singular, a polynomial piecewise fitting method can be used to establish the Z-k relationship curve. The specific segment locations can be determined based on cross-sectional data. Figure 2 As shown, the station cross-section is a complex cross-section. When the water level is between 2.9m and 4.0m, a floodplain exists, increasing the river width. Segmented fitting was performed at 2.38m, 2.91m, and 3.50m, dividing the river into four sections. Figure 3 It can be seen that the Z-k relationship of the polynomial fitting in each segment is good, and R 2 Between 0.999 and 1.00, the k values ​​for different water levels were calculated using the fitted polynomial formula. The k values ​​calculated using the conventional calibration method, the k values ​​calculated using the calibration method considering test errors, and the Z-k relationship curve obtained from the piecewise fitting of the polynomial were plotted on the same graph. Figure 4 As shown in the figure, the k-values ​​calculated by the conventional calibration method are relatively scattered. The polynomial piecewise fitting curve basically coincides with the k-values ​​calculated by the calibration method considering test error, and passes well through the center of the k-value point group calculated by the conventional calibration method.

[0038] S320, calculate the online flow data of the hydrological instrument under different river water levels based on the virtual water level flow curve and the water level coefficient curve, and establish the online water level flow curve between the river water level and the online flow data based on the curve relationship fitting method; The method for calculating the online flow data of the hydrological instrument under different river water levels based on the virtual water level flow curve and the water level coefficient curve is shown in the following formula:

[0039] In the formula, A represents the online water flow data of the hydrological instrument under different river water levels;K i For the river water level in the water level coefficient curve i The corresponding calibration flow coefficient; A si To represent the river water level in the virtual water level flow curve i The corresponding water flow data is below.

[0040] Specifically, in this embodiment, since the flow rate Qc is measured by the current meter and the velocity Vc is measured by the mobile ADCP, if the virtual flow rate Qs is selected, the water level of the same river is calculated according to the water level classification. i The corresponding flow data - virtual flow rate Qs, and calibration flow coefficients are as follows. K i Therefore, the position of the hydrological instrument under test at the river water level can be obtained. i The online water flow data is as follows:

[0041] If a virtual flow velocity Vs is selected, the water level of the same river can be calculated according to the water level classification. i The corresponding flow data - virtual velocity Vs, and calibration flow coefficients. K i Therefore, the position of the hydrological instrument under test at the river water level can be obtained. i The online water flow data is as follows:

[0042] Then, based on the curve fitting method, an online water level-flow curve is established between the river water level and the online flow data. See details... Figure 5 As shown.

[0043] S330, based on a certain gradient in the river water level, searches for the data corresponding to the standard water level-flow curve and the online water level-flow curve, and determines whether the hydrological instrument to be measured meets the requirements for commissioning and use based on the search results, including: S331, based on searching the standard flow data in the standard water level flow curve at the same water level and the online flow data in the online water level flow curve according to a certain gradient of the river water level; S332, calculate the comparison error between the online water flow data obtained from the search and the standard water flow data; S333, if the comparison error result is within the preset range, the hydrological instrument under test is determined to meet the requirements for commissioning and use, including: Multiple sets of standard water flow data and online water flow data at different water levels were obtained. The mean error between multiple sets of standard flow data and online flow data is calculated as follows:

[0044] The standard deviation is calculated based on the mean error, and the random uncertainty is calculated based on the standard deviation; the random uncertainty is the uncertainty assessed from the fluctuations of repeated measurements using statistical methods.

[0045] The formula for calculating the standard deviation s is as follows:

[0046] The formula for calculating uA is as follows:

[0047] If the mean error is less than or equal to the error threshold and the random uncertainty is less than or equal to the uncertainty threshold, then the hydrological instrument under test is determined to meet the requirements for commissioning and use.

[0048] Specifically, if the mean error and random uncertainty meet the requirements for comparative testing of test methods in the "Specification for River Flow Measurement" (GB 50179-2015), that is, the random uncertainty of comparative testing should not exceed 6%, and the uncertainty under poor comparative testing conditions should not exceed 7%; the mean error should not exceed ±1%, and the uncertainty under poor comparative testing conditions should not exceed ±2%; if the standard requirements are met, the hydrological instrument under test is deemed to meet the requirements for commissioning and use.

[0049] Furthermore, this invention also provides a water flow rate ratio measurement system that considers measurement errors, including: The data acquisition module is used to acquire measured flow data in rivers from standard hydrological instruments and measured virtual flow data in rivers from hydrological instruments under test. A curve establishment module, communicatively connected to the data acquisition module, is used to establish a standard water level-flow curve between the river water level and the measured flow data, and a virtual water level-flow curve between the river water level and the measured virtual flow data, based on a curve relationship fitting method; and, The judgment module is connected in communication with the curve establishment module and is used to determine whether the hydrological instrument under test meets the requirements for commissioning and use based on the standard water level flow curve and the virtual water level flow curve.

[0050] In summary, the main advantages of this invention are as follows: The calibration comparison method of the system uses the ratio of the measured flow rate Qc or velocity Vc (measured by a current meter or ADCP) obtained by synchronous flow measurement at different water levels and time periods, and the virtual flow rate Qs or virtual velocity Vs measured by the hydrological instrument under test as the calibration index. However, in actual station measurement work, the following two problems often exist in the calibration comparison method: (1) The observation time of current meter measurement and mobile ADCP is generally long, while the time required for new instruments and equipment, especially non-contact surface velocity measurement, is shorter. For example, for small rivers with a width of about 100m, the velocity measurement time of mechanical rotor current meter or ADCP is usually more than half an hour, while the spatiotemporal image velocity measurement technology only needs to shoot tens of seconds of water flow video to complete the surface velocity measurement. Therefore, the non-contact flow measurement period is significantly shorter than the station cableway flow measurement period. The two are not completely synchronized in time, and the measured flow rate and velocity are mostly the average value of the test period. The time asynchrony will cause the test results to be inconsistent; (2) The influence of test error during the test process is not considered. Any instrument or equipment test may have testing errors. If the testing errors of two instruments are one positive and the other negative, it will lead to an increase in calibration error.

[0051] The flow rate calibration method proposed in this invention, compared with traditional methods, fully considers the impact of asynchronous testing time and random testing errors during calibration calibration, and greatly improves the accuracy and efficiency of calibration calibration.

[0052] Specifically, this embodiment corresponds one-to-one with the above method embodiments. The functions of each module have been described in detail in the corresponding method embodiments, so they will not be repeated here.

[0053] Based on the same inventive concept, embodiments of this application also provide a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements all or part of the method steps of the above method.

[0054] The present invention can implement all or part of the processes in the above methods, or it can be accomplished by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when the computer program is executed by a processor, it can implement the steps of the various method embodiments described above. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. The computer-readable medium can include: any entity or device capable of carrying computer program code, recording media, USB flash drives, portable hard drives, magnetic disks, optical disks, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signals, telecommunication signals, and software distribution media, etc. It should be noted that the content contained in the computer-readable medium can be appropriately added or removed according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, the computer-readable medium does not include electrical carrier signals and telecommunication signals.

[0055] Based on the same inventive concept, embodiments of this application also provide an electronic device, including a memory and a processor. The memory stores a computer program that runs on the processor. When the processor executes the computer program, it implements all or part of the method steps described above.

[0056] The processor can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor can be a microprocessor or any conventional processor. The processor is the control center of the computer device, connecting all parts of the computer device through various interfaces and lines.

[0057] Memory can be used to store computer programs and / or modules. The processor performs various functions of the computer device by running or executing the computer programs and / or modules stored in the memory, and by accessing data stored in the memory. Memory can primarily include a program storage area and a data storage area. The program storage area can store the operating system and at least one application program required for a function (e.g., sound playback, image playback, etc.); the data storage area can store data created based on the use of the mobile phone (e.g., audio data, video data, etc.). Furthermore, memory can include high-speed random access memory, and can also include non-volatile memory, such as hard disks, RAM, plug-in hard disks, SmartMedia Cards (SMC), Secure Digital (SD) cards, Flash Cards, at least one disk storage device, flash memory device, or other volatile solid-state storage devices.

[0058] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, servers, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage and optical storage) containing computer-usable program code.

[0059] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), servers, and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0060] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0061] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0062] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A method for measuring water flow rate by ratio considering measurement error, characterized in that, include: Acquire measured flow data from standard hydrological instruments in rivers, and measured virtual flow data from hydrological instruments under test in rivers; A standard water level-flow curve and a virtual water level-flow curve are established between the river water level and the measured water flow data based on the curve relationship fitting method. Based on the standard water level flow curve and the virtual water level flow curve, determine whether the hydrological instrument to be measured meets the requirements for commissioning and use.

2. The method for determining the water flow rate by taking into account measurement errors as described in claim 1, characterized in that, The step of determining whether the hydrological instrument under test meets the requirements for commissioning and use based on the standard water level flow curve and the virtual water level flow curve includes: Based on the standard water level flow curve and the virtual water level flow curve, the calibration flow coefficient at different river water levels is calculated, and a water level coefficient curve between the river water level and the calibration flow coefficient is established based on the curve relationship fitting method. The online flow data of the hydrological instrument under different river water levels are calculated based on the virtual water level flow curve and the water level coefficient curve, and the online water level flow curve between the river water level and the online flow data is established based on the curve relationship fitting method. Based on the data corresponding to the standard water level flow curve and the online water level flow curve according to a certain gradient of the river water level, and based on the search results, it is determined whether the hydrological instrument to be measured meets the requirements for commissioning and use.

3. The method for determining the water flow rate by taking into account measurement errors as described in claim 2, characterized in that, The method for calculating the calibration flow coefficient at different river water levels based on the standard water level flow curve and the virtual water level flow curve is shown in the following formula: In the formula, K River water level i The corresponding calibration flow coefficient; A ci To determine the river water level in the standard water level flow curve i The corresponding water flow data is below; A si To represent the river water level in the virtual water level flow curve i The corresponding water flow data is below.

4. The method for determining the water flow rate by taking into account measurement errors as described in claim 2, characterized in that, The method for calculating the online flow data of the hydrological instrument under different river water levels based on the virtual water level flow curve and the water level coefficient curve is shown in the following formula: In the formula, A represents the value of the hydrological instrument being measured at the river water level. i The online water flow data below; K i For the river water level in the water level coefficient curve i The corresponding calibration flow coefficient; A si To represent the river water level in the virtual water level flow curve i The corresponding water flow data is below.

5. The method for determining the water flow rate by taking into account measurement errors as described in claim 2, characterized in that, The process of finding the data corresponding to the standard water level flow curve and the online water level flow curve based on a certain gradient of river water level, and determining whether the hydrological instrument to be measured meets the requirements for commissioning and use based on the search results, includes: Based on searching the standard flow data in the standard water level flow curve at the same water level according to a certain gradient, and the online flow data in the online water level flow curve; Calculate the comparison error between the obtained online water flow data and the standard water flow data; If the measurement error is within the preset range, the hydrological instrument under test is deemed to meet the requirements for commissioning and use.

6. The method for determining the water flow rate by taking into account measurement errors as described in claim 5, characterized in that, The calculation of the online flow data relative to the standard flow data determines the accuracy of the comparison error. If the comparison error is within a preset range, the hydrological instrument is deemed to meet the requirements for commissioning and use, including: Multiple sets of standard water flow data and online water flow data at different water levels were obtained. Calculate the mean error between multiple sets of standard flow data and online flow data; The standard deviation is calculated based on the mean error, and the random uncertainty is calculated based on the standard deviation. If the mean error is less than or equal to the error threshold and the random uncertainty is less than or equal to the uncertainty threshold, then the hydrological instrument under test is determined to meet the requirements for commissioning and use.

7. The method for determining the water flow rate by taking into account measurement errors as described in any one of claims 1 to 2, characterized in that, The curve relationship fitting method includes the graphical method and the curve fitting method.

8. A water flow rate ratio measurement system that takes into account measurement error, characterized in that, include: The data acquisition module is used to acquire measured flow data in rivers from standard hydrological instruments and measured virtual flow data in rivers from hydrological instruments under test. The curve establishment module is communicatively connected to the data acquisition module and is used to establish a standard water level-flow curve between the river water level and the measured water flow data, and a virtual water level-flow curve between the river water level and the measured virtual water flow data, based on the curve relationship fitting method. The judgment module is connected in communication with the curve establishment module and is used to determine whether the hydrological instrument under test meets the requirements for commissioning and use based on the standard water level flow curve and the virtual water level flow curve.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the method for determining the water flow rate ratio considering the test error as described in any one of claims 1 to 7.

10. An electronic device comprising a storage medium, a processor, and a computer program stored in the storage medium and executable on the processor, characterized in that, When the processor runs the computer program, it implements the method for determining the water flow rate ratio considering the test error as described in any one of claims 1 to 7.

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