Method and device for determining coefficient of converting electricity into water in agricultural irrigation

Abstract

The invention provides a method and a device for determining a coefficient of converting electricity into water for agricultural irrigation, relates to the technical field of agricultural irrigation, and aims to analyze that the equivalent flow velocity of water flow is influenced by various factors including pipeline internal roughness, water level pressure of a water pumping end and potential energy difference which can influence the water pumping efficiency, and the more bubbles in water are, the lower the water pumping efficiency is. The water pumping efficiency can influence the calculation accuracy of the electric water conversion coefficient, related resistance consumption parameters, water pumping pipe parameters and a water sample gray scale picture are collected and subjected to correlation analysis, and a comprehensive resistance consumption coefficient, a kinetic energy resistance consumption coefficient and a water flow bubble coefficient used for reflecting the bubble content are generated; after further analysis, generating an electricity-to-water coefficient accuracy evaluation index for reflecting the accuracy degree of the method for calculating the electricity-to-water coefficient through the water pump parameters, and outputting the electricity-to-water coefficient for agricultural irrigation to determine the accuracy level.

Description

Technical Field

[0001] The present invention relates to the technical field of agricultural irrigation, and in particular to a method and device for determining an electricity-to-water coefficient for agricultural irrigation. Background Art

[0002] "Electricity-to-water conversion" is an innovative agricultural irrigation management method that primarily estimates irrigation water usage by measuring the electricity consumption of water pumps. The core of this method lies in studying the relationship between electricity consumption and water withdrawal, establishing a water-to-electricity conversion coefficient that accurately converts electricity consumption into actual water withdrawal. Specifically, when a water pump is operating, electricity consumption and water withdrawal exhibit a certain proportional relationship. Through in-depth analysis of this relationship, a water-to-electricity conversion coefficient suitable for specific irrigation equipment and water sources can be determined. Water consumption can then be calculated based on electricity consumption. This method improves the scientific and accurate nature of irrigation and effectively avoids water waste due to human error.

[0003] The electricity-to-water coefficient is the ratio of electricity consumption to water pumping volume. Since electricity consumption is the product of power and time, and water pumping volume is the product of pumping speed and time, the electricity-to-water coefficient is determined as the ratio of pump power to pumping speed. However, when the water pump is pumping water, the equivalent flow rate of the water is affected by various factors, including the roughness of the pipe interior, the water level pressure at the pumping end, and the potential energy difference. These factors will affect the pumping efficiency. At the same time, the more bubbles in the water, the lower the pumping efficiency. The pumping efficiency will affect the accuracy of the calculation using the electricity-to-water coefficient.

[0004] The above information disclosed in this Background section is only for enhancement of understanding of the background of the present disclosure and therefore it may contain information that does not form the prior art that is already known to a person of ordinary skill in the art. Summary of the Invention

[0005] The purpose of the present invention is to provide a method and device for determining the electricity-to-water coefficient for agricultural irrigation, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions: The method for determining the electricity-to-water coefficient for agricultural irrigation includes the following steps: S1. Pumping water through a water pump and delivering it to the irrigation area for irrigation, and collecting resistance parameters during the irrigation process, wherein the resistance parameters include fluid pressure, fluid flow rate in the pumping pipe, and pumping height; S2. Perform correlation analysis on resistance parameters to generate pressure resistance coefficient , kinetic energy resistance coefficient , and conduct correlation analysis on pressure resistance coefficient, kinetic energy resistance coefficient and pumping height to generate comprehensive resistance coefficient The comprehensive resistance coefficient is used to reflect the energy required to pump the fluid from the pumping end of the pumping pipe to the water pump. S3, collecting water pumping pipe parameters, wherein the water pumping pipe parameters include the diameter of the water pumping pipe and the roughness of the inner wall of the water pumping pipe; S4. Conduct correlation analysis on the diameter of the pumping pipe and the flow rate of the fluid in the pumping pipe to generate the friction coefficient. A coefficient used to reflect the energy required to overcome the roughness of the inner wall of the pipe to pump the fluid from the pumping end of the pumping pipe to the water pump; S5. During operation, collect N grayscale photos of water samples, observe and analyze the grayscale photos of water samples, and generate water flow bubble coefficients. , the water flow bubble coefficient is used to reflect the bubble content coefficient in the extracted water body; S6, friction coefficient , comprehensive resistance coefficient , water bubble coefficient Perform correlation analysis to generate an accuracy evaluation index YXZ for the electricity-to-water coefficient. The accuracy evaluation index YXZ for the electricity-to-water coefficient is used to reflect the accuracy of the method for calculating the electricity-to-water coefficient through water pump parameters. S7, the accuracy evaluation index YXZ of the electric water deduction coefficient and the threshold Compare and output the accuracy level of agricultural irrigation electricity-to-water coefficient.

[0007] Furthermore, in S1, the fluid pressure P is the water pressure at the pumping end of the pumping pipe, which is obtained by measuring with a pressure gauge; the fluid flow rate v is the water flow rate in the pumping pipe during pumping, which is obtained by measuring with a flow meter; and the pumping height H is the vertical height difference between the pumping end of the pumping pipe and the water pump.

[0008] Furthermore, the fluid pressure P is subjected to correlation analysis to generate the pressure resistance coefficient , based on the formula: ; in, is the density of the pumped water, is the acceleration due to gravity, the pressure resistance coefficient A coefficient used to reflect the potential energy that needs to be overcome due to pressure when pumping water from the pumping end of the pumping pipe to the water pump; Perform correlation analysis on the fluid velocity v to generate the kinetic energy loss coefficient , based on the formula: ; Among them, the kinetic energy resistance coefficient A coefficient used to reflect the amount of kinetic energy that needs to be overcome due to the flow velocity when pumping water from the pumping end of the pumping pipe to the water pump; Perform correlation analysis on pressure resistance coefficient, kinetic energy resistance coefficient and pumping height to generate comprehensive resistance coefficient , based on the formula: ; in, is the flow velocity weight factor, is the pressure weight factor, , comprehensive resistance coefficient A coefficient used to reflect the amount of energy required to pump water from the pumping end of the pump pipe to the water pump.

[0009] Furthermore, in said S3, the roughness of the inner wall of the water pumping pipe including the average roughness is collected. and the maximum roughness Rz, and the average roughness of the inner wall of the pipe is measured by a stylus roughness measuring instrument and the maximum roughness Rz.

[0010] Furthermore, the diameter of the water pump pipe , fluid flow rate in the pumping pipe Perform correlation analysis to generate friction coefficient , based on the formula: ; Where L is the length of the pumping pipe, The friction coefficient factor is used to reflect the roughness of the inside of the pumping pipe. The formula for determining the value of is: ; in, is the roughness coefficient, , is the Reynolds number, and the calculation formula is: , is the fluid viscosity, that is, the viscosity of the water extracted by the pump, is the flow rate of water in the water area where the pumping end of the pumping pipe is located, The Reynolds number is used to reflect the flow state of the pumped water.

[0011] Furthermore, in said S5, a camera is used to take N grayscale photos of water samples in the pumping area, the pixel points of the water sample grayscale photos are 1920x1080, and each water sample grayscale photo is observed, wherein the first The number of bubble pixels in the grayscale photo of the water sample is , the number of pixels and bubble pixels in the water sample grayscale photo Perform correlation analysis to generate water flow bubble coefficient , based on the formula: ; Water bubble coefficient Used to reflect the bubble content coefficient in the extracted water body.

[0012] Furthermore, the friction coefficient , comprehensive resistance coefficient , water bubble coefficient Correlation analysis is performed to generate the accuracy evaluation index YXZ based on the electricity-to-water coefficient, based on the following formula: ; The accuracy evaluation index YXZ of the electricity-to-water coefficient is used to reflect the accuracy of the method for calculating the electricity-to-water coefficient based on water pump parameters.

[0013] Furthermore, the accuracy of the electric water deduction coefficient evaluation index YXZ and the threshold Compare, threshold ,when When the accuracy level of the output electricity-to-water coefficient for agricultural irrigation is level 2, the electricity-to-water coefficient calculated by the water pump parameters is inaccurate; when When the output agricultural irrigation is at level one, the accuracy level of the electricity-to-water coefficient is calculated through water pump parameters and the electricity-to-water coefficient is accurate.

[0014] The present invention also provides a device for determining the electricity-to-water coefficient for agricultural irrigation, which is used to execute a method for determining the electricity-to-water coefficient for agricultural irrigation, comprising: Resistance and loss parameter acquisition module, used to collect resistance and loss parameters; Resistance coefficient analysis module, used to perform correlation analysis on resistance parameters and generate pressure resistance coefficient , kinetic energy resistance coefficient , and conduct correlation analysis on pressure resistance coefficient, kinetic energy resistance coefficient and pumping height to generate comprehensive resistance coefficient ; The water pumping pipe parameter collection module is used to collect water pumping pipe parameters; The friction coefficient analysis module is used to perform correlation analysis on the diameter of the water pumping pipe and the flow rate of the fluid in the water pumping pipe to generate the friction coefficient; Water sample analysis module, used to collect N grayscale photos of water samples, observe and analyze the grayscale photos of water samples, and generate water flow bubble coefficient ; Comprehensive analysis module for friction loss coefficient , comprehensive resistance coefficient , water bubble coefficient Perform correlation analysis to generate the accuracy evaluation index YXZ of the electric water deduction coefficient, and compare the accuracy evaluation index YXZ with the threshold value. Compare and output the accuracy level of agricultural irrigation electricity-to-water coefficient.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention combines the calculation method of the electric water deduction coefficient to analyze that when the water pump is pumping water, the equivalent flow rate of the water flow is affected by various factors, including the roughness of the internal pipe, the water level pressure at the pumping end, and the potential energy difference, which will affect the pumping efficiency. At the same time, the more bubbles there are in the water, the lower the pumping efficiency will be, and the pumping efficiency will affect the accuracy of the calculation of the electric water deduction coefficient. Therefore, relevant resistance parameters, pumping pipe parameters, and water sample grayscale photos are collected and correlation analysis is performed to generate a comprehensive resistance coefficient for reflecting the amount of energy that needs to be overcome to pump the fluid from the pumping end of the pumping pipe to the water pump, a kinetic energy resistance coefficient for reflecting the amount of kinetic energy due to the flow velocity that needs to be overcome to pump the water flow from the pumping end of the pumping pipe to the water pump, and a water bubble coefficient for reflecting the bubble content. After further analysis, an electric water deduction coefficient accuracy evaluation index is generated to reflect the accuracy of the method for calculating the electric water deduction coefficient through water pump parameters, and the accuracy level determined by the electric water deduction coefficient for agricultural irrigation is output. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of the overall method flow of the present invention; Figure 2 This is a schematic diagram of the overall system flow of the present invention; Figure 3 This is a fitting curve diagram of the comprehensive resistance coefficient-accuracy evaluation index of the present invention; Figure 4 This is a fitting curve diagram of the friction coefficient-accuracy evaluation index of the present invention; Figure 5 This is a fitting curve diagram of the water flow bubble coefficient-accuracy evaluation index of the present invention. DETAILED DESCRIPTION

[0017] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to specific embodiments.

[0018] It should be noted that, unless otherwise defined, the technical or scientific terms used in the present invention should have the usual meanings understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative position relationships. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0019] Example: See also Figure 1 , the present invention provides a technical solution: Agricultural irrigation uses a method to determine the electricity-to-water coefficient, which is the ratio of power consumption to water pumping volume. Since power consumption is the product of power and time, and water pumping volume is the product of pumping speed and time, the electricity-to-water coefficient is determined as the ratio of pump power to pumping speed. However, when the water pump is pumping water, the equivalent flow rate of the water flow is affected by various factors, including the roughness of the pipe interior, the water level pressure at the pumping end, and the potential energy difference. These factors will affect the pumping efficiency. At the same time, the more bubbles in the water, the lower the pumping efficiency. The pumping efficiency will affect the accuracy of the calculation of the electricity-to-water coefficient. The present invention collects relevant data and analyzes it. The specific steps include: S1: To analyze the impact of water level pressure and potential energy difference at the pumping end on the calculation of electricity-to-water conversion, water is pumped by a water pump and transported to the irrigation area for irrigation. During the irrigation process, resistance parameters are collected. The resistance parameters include fluid pressure, fluid flow rate in the pumping pipe, and pumping height. The pumping end is the end of the pumping pipe away from the water pump. S2: Perform correlation analysis on resistance parameters to generate pressure resistance coefficient , kinetic energy resistance coefficient , and conduct correlation analysis on pressure resistance coefficient, kinetic energy resistance coefficient and pumping height to generate comprehensive resistance coefficient The comprehensive resistance coefficient is used to reflect the energy required to pump the fluid from the pumping end of the pumping pipe to the water pump. The fluid pressure P is the water pressure at the pumping end of the pumping pipe, which is measured by a pressure gauge. The fluid flow velocity v is the water flow velocity in the pumping pipe during pumping, which is measured by a flow meter. The pumping height H is the vertical height difference between the pumping end of the pumping pipe and the water pump.

[0020] Perform correlation analysis on fluid pressure P to generate pressure resistance coefficient , based on the formula: ; in, is the density of the pumped water, is the acceleration due to gravity, the pressure resistance coefficient The coefficient used to reflect the potential energy that needs to be overcome due to pressure when pumping water from the pumping end of the pumping pipe to the water pump, the pressure resistance coefficient The larger the value is, the greater the impact on the pumping efficiency is. Perform correlation analysis on the fluid velocity v to generate the kinetic energy loss coefficient , based on the formula: ; Among them, the kinetic energy resistance coefficient A coefficient used to reflect the kinetic energy that needs to be overcome due to the flow velocity when pumping water from the pumping end of the pumping pipe to the water pump. The kinetic energy of water is proportional to the square of the flow velocity. The greater the flow velocity, the greater the kinetic energy. This means that fast-flowing fluids have higher energy performance and the water pump needs to overcome more resistance; kinetic energy resistance coefficient The larger the value is, the greater the impact on the pumping efficiency is. Perform correlation analysis on pressure resistance coefficient, kinetic energy resistance coefficient and pumping height to generate comprehensive resistance coefficient , based on the formula: ; Kinetic energy resistance coefficient The larger the value is, the greater the impact on the pumping efficiency is. The larger the value of , the higher the impact on the pumping efficiency during pumping. The larger the value of the pumping height H, the higher the impact on the pumping efficiency during pumping. The comprehensive kinetic energy resistance coefficient , pressure resistance coefficient , pumping height H is analyzed to generate a comprehensive resistance coefficient , comprehensive resistance coefficient A coefficient used to reflect the energy required to pump water from the pumping end of the pumping pipe to the water pump, where: is the flow rate weight factor, which is used to reflect the contribution of the water flow velocity in the pipe to the loss during pumping. The pressure weight factor is used to reflect the contribution of the pressure difference that needs to be overcome during pumping to the loss. , the greater the fluid flow velocity v, the greater the flow velocity weight factor.

[0021] S3: Collecting water pumping pipe parameters, including the diameter of the water pumping pipe and the roughness of the inner wall of the water pumping pipe; Collect the roughness of the inner wall of the water pump pipe, including the average roughness and the maximum roughness Rz, and the average roughness of the inner wall of the pipe is measured by a stylus roughness measuring instrument Specifically, place the stylus at the measuring point on the inner wall of the pipe, ensuring that the stylus is perpendicular to the inner wall of the pipe; start the instrument, and the stylus will rotate and move along the inner wall to record the surface fluctuation data; the difference between the maximum and minimum values ​​of the fluctuation data is the maximum roughness Rz, and the average roughness is obtained by subtracting the minimum value from all the data and averaging them. .

[0022] S4: In order to analyze the influence of the roughness of the pumping pipe on the pumping efficiency, the correlation analysis of the pumping pipe diameter and the fluid flow rate in the pumping pipe is carried out to generate the friction loss coefficient. A coefficient used to reflect the energy required to overcome the roughness of the inner wall of the pipe to pump the fluid from the pumping end of the pumping pipe to the water pump; Diameter of the water pipe , fluid flow rate in the pumping pipe Perform correlation analysis to generate friction coefficient , based on the formula: ; Where L is the length of the pumping pipe, The friction coefficient factor is used to reflect the roughness of the inside of the pumping pipe. The formula for determining the value of is: ; in, is the roughness coefficient, , is the Reynolds number, and the calculation formula is: , is the fluid viscosity, that is, the viscosity of the water extracted by the pump, is the flow rate of water in the water area where the pumping end of the pumping pipe is located, Reynolds number is used to reflect the flow state of the pumped water. Friction coefficient The larger the value is, the greater the impact on the pumping efficiency is. S5: In order to determine the bubble content in the water body, N grayscale photos of the water sample are collected during operation, and the grayscale photos of the water sample are observed and analyzed to generate the water flow bubble coefficient. , the water flow bubble coefficient is used to reflect the bubble content coefficient in the extracted water body; N grayscale photos of water samples in the pumping area are taken by a camera, and the pixel points of the water sample grayscale photos are 1920x1080. Each water sample grayscale photo is observed, wherein the N water sample grayscale photos taken are sorted, and i is used as the index of the serial number, and the value of i is 1, 2, 3, ..., N, and the first The number of pixels occupied by bubbles in the grayscale photo of the water sample is , the number of pixels and bubble pixels in the water sample grayscale photo Perform correlation analysis to generate water flow bubble coefficient , based on the formula: ; Water bubble coefficient It is used to reflect the bubble content coefficient in the extracted water body. If there are bubbles in the water, it will affect the fluidity of the water flow when the water pump is pumping water, and reduce the pumping speed. The more bubbles there are, the greater the impact on the accuracy of the electric water deduction coefficient assessment.

[0023] S6: Friction coefficient , comprehensive resistance coefficient , water bubble coefficient Perform correlation analysis to generate an accuracy evaluation index YXZ for the electricity-to-water coefficient. The accuracy evaluation index YXZ for the electricity-to-water coefficient is used to reflect the accuracy of the method for calculating the electricity-to-water coefficient through water pump parameters. Friction coefficient , comprehensive resistance coefficient , water bubble coefficient Correlation analysis is performed to generate the accuracy evaluation index YXZ based on the electricity-to-water coefficient, based on the following formula: ; Comprehensive resistance coefficient , friction coefficient The larger the value, the greater the resistance to be overcome when pumping water, and the greater the impact on the accuracy of the water-dissipation coefficient. The larger it is, the more bubbles there are. When the water pump pumps water, it will affect the fluidity of the water flow and reduce the pumping speed. The greater the impact on the accuracy evaluation of the electric water deduction coefficient. The electric water deduction coefficient accuracy evaluation index YXZ is used to reflect the accuracy of the method for calculating the electric water deduction coefficient through water pump parameters.

[0024] Table 1: Experimental statistical data of friction loss coefficient, comprehensive loss coefficient and water bubble coefficient

[0025] Reference Figure 3-Figure 5 , which are the fitting curves of comprehensive resistance coefficient, friction resistance coefficient and water flow bubble coefficient to accuracy evaluation index. From the figure, it can be concluded that the larger the values ​​of comprehensive resistance coefficient and friction resistance coefficient are, the larger the accuracy evaluation index of electric deduction coefficient is; the larger the water flow bubble coefficient is, the larger the accuracy evaluation index of electric deduction coefficient is, and they are all positively correlated.

[0026] S7: The accuracy evaluation index YXZ and the threshold value of the electric water deduction coefficient Compare and output the accuracy level of agricultural irrigation electricity-to-water coefficient.

[0027] The accuracy evaluation index YXZ and the threshold value of the electric water deduction coefficient will be used Compare, threshold ,when When the accuracy level of the output electricity-to-water coefficient for agricultural irrigation is level 2, the electricity-to-water coefficient calculated by the water pump parameters is inaccurate, and the ratio between power consumption and water pumping volume cannot be used to calculate the electricity-to-water coefficient; when When the output electricity-to-water coefficient of agricultural irrigation is at level one, the electricity-to-water coefficient can be calculated accurately through the water pump parameters. The electricity-to-water coefficient can be calculated by using the ratio between power consumption and water pumping volume.

[0028] See also Figure 2 The present invention also proposes a device for determining the electricity-to-water coefficient for agricultural irrigation, which is used to execute a method for determining the electricity-to-water coefficient for agricultural irrigation, comprising: Resistance and loss parameter acquisition module, used to collect resistance and loss parameters; Resistance coefficient analysis module, used to perform correlation analysis on resistance parameters and generate pressure resistance coefficient , kinetic energy resistance coefficient , and conduct correlation analysis on pressure resistance coefficient, kinetic energy resistance coefficient and pumping height to generate comprehensive resistance coefficient ; The water pumping pipe parameter collection module is used to collect water pumping pipe parameters; The friction coefficient analysis module is used to perform correlation analysis on the diameter of the water pumping pipe and the flow rate of the fluid in the water pumping pipe to generate the friction coefficient; Water sample analysis module, used to collect N grayscale photos of water samples, observe and analyze the grayscale photos of water samples, and generate water flow bubble coefficient ; Comprehensive analysis module for friction loss coefficient , comprehensive resistance coefficient , water bubble coefficient Perform correlation analysis to generate the accuracy evaluation index YXZ of the electric water deduction coefficient, and compare the accuracy evaluation index YXZ with the threshold value. Compare and output the accuracy level of agricultural irrigation electricity-to-water coefficient.

[0029] The above formulas are all dimensionless and numerical calculations. The formulas are obtained by collecting a large amount of data and performing software simulation to obtain the most recent real situation. The preset parameters in the formulas are set by technicians in this field according to actual conditions.

[0030] The above embodiments can be implemented in whole or in part by software, hardware, firmware, or any other combination thereof. When implemented using software, the above embodiments can be implemented in whole or in part in the form of a computer program product. Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed by hardware or software depends on the specific application and design constraints of the technical solution.

[0031] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, and may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment as needed.

[0032] The above is only a specific implementation method of the present application, but the scope of protection of the present application is not limited thereto. Any technician familiar with this technical field can easily think of changes or replacements within the technical scope disclosed in this application, which should be covered by the scope of protection of the present application.

Claims

1. A method for determining the electricity-to-water coefficient for agricultural irrigation, characterized in that: The specific steps include: S1. Pumping water through a water pump and delivering it to the irrigation area for irrigation, and collecting resistance parameters during the irrigation process, wherein the resistance parameters include fluid pressure, fluid flow rate in the pumping pipe, and pumping height; S2. Perform a correlation analysis on the resistance parameters to generate a pressure resistance coefficient and a kinetic energy resistance coefficient. Perform a correlation analysis on the pressure resistance coefficient, the kinetic energy resistance coefficient, and the pumping height to generate a comprehensive resistance coefficient. The comprehensive resistance coefficient is used to reflect the energy required to pump the fluid from the pumping end of the pumping pipe to the water pump. S3, collecting water pumping pipe parameters, wherein the water pumping pipe parameters include the diameter of the water pumping pipe and the roughness of the inner wall of the water pumping pipe; S4. Perform a correlation analysis on the diameter of the pumping pipe and the flow rate of the fluid in the pumping pipe to generate a friction coefficient. The friction coefficient is used to reflect the energy required to overcome the roughness of the inner wall of the pipe to pump the fluid from the pumping end of the pumping pipe to the water pump. S5. During operation, N grayscale photos of water samples are collected, and the grayscale photos of water samples are observed and analyzed to generate a water flow bubble coefficient, which is used to reflect the bubble content coefficient in the extracted water body; S6. Perform correlation analysis on the friction loss coefficient, the comprehensive loss coefficient, and the water bubble coefficient to generate an accuracy evaluation index YXZ for the electricity-to-water coefficient. The electricity-to-water coefficient accuracy evaluation index YXZ is used to reflect the accuracy of the method for calculating the electricity-to-water coefficient based on water pump parameters. S7. Compare the accuracy evaluation index YXZ of the electricity-to-water coefficient with the threshold value, and output the accuracy level of the electricity-to-water coefficient for agricultural irrigation.

2. The method for determining the electricity-to-water coefficient for agricultural irrigation according to claim 1, wherein: In S1, the fluid pressure P is the water pressure at the pumping end of the pumping pipe, which is measured by a pressure gauge; the fluid flow rate v is the water flow rate in the pumping pipe during pumping, which is measured by a flow meter; and the pumping height H is the vertical height difference between the pumping end of the pumping pipe and the water pump.

3. The method for determining the electricity-to-water coefficient for agricultural irrigation according to claim 2, wherein: Perform correlation analysis on fluid pressure P to generate pressure resistance coefficient , based on the formula: ; in, is the density of the pumped water, is the acceleration due to gravity, the pressure resistance coefficient A coefficient used to reflect the potential energy that needs to be overcome due to pressure when pumping water from the pumping end of the pumping pipe to the water pump; Perform correlation analysis on the fluid velocity v to generate the kinetic energy loss coefficient , based on the formula: ； Among them, the kinetic energy resistance coefficient A coefficient used to reflect the amount of kinetic energy that needs to be overcome due to the flow velocity when pumping water from the pumping end of the pumping pipe to the water pump; Perform correlation analysis on pressure resistance coefficient, kinetic energy resistance coefficient and pumping height to generate comprehensive resistance coefficient , based on the formula: ； in, is the flow velocity weight factor, is the pressure weight factor, , comprehensive resistance coefficient A coefficient used to reflect the amount of energy required to pump water from the pumping end of the pump pipe to the water pump.

4. The method for determining the electricity-to-water coefficient for agricultural irrigation according to claim 3, wherein: In said S3, the roughness of the inner wall of the water pumping pipe including the average roughness is collected. and the maximum roughness Rz, and the average roughness of the inner wall of the pipe is measured by a stylus roughness measuring instrument and the maximum roughness Rz.

5. The method for determining the electricity-to-water coefficient for agricultural irrigation according to claim 4, wherein: Diameter of the water pipe , fluid flow rate in the pumping pipe Perform correlation analysis to generate friction coefficient , based on the formula: ； Where L is the length of the pumping pipe, The friction coefficient factor is used to reflect the roughness of the inside of the pumping pipe. The formula for determining the value of is: ； in, is the roughness coefficient, , is the Reynolds number, and the calculation formula is: , is the fluid viscosity, that is, the viscosity of the water extracted by the pump, is the flow rate of water in the water area where the pumping pipe is located, The Reynolds number is used to reflect the flow state of the pumped water.

6. The method for determining the electricity-to-water coefficient for agricultural irrigation according to claim 1, wherein: In said S5, a camera is used to take N grayscale photos of water samples in the pumping area, the pixel points of the water sample grayscale photos are 1920x1080, and each water sample grayscale photo is observed, wherein the first The number of bubble pixels in the grayscale photo of the water sample is , the number of pixels and bubble pixels in the water sample grayscale photo Perform correlation analysis to generate water flow bubble coefficient , based on the formula: ； Water bubble coefficient Used to reflect the bubble content coefficient in the extracted water body.

7. The method for determining the electricity-to-water coefficient for agricultural irrigation according to claim 1, wherein: Friction coefficient , comprehensive resistance coefficient , water bubble coefficient Correlation analysis is performed to generate the accuracy evaluation index YXZ based on the electricity-to-water coefficient, based on the following formula: ； The accuracy evaluation index YXZ of the electricity-to-water coefficient is used to reflect the accuracy of the method for calculating the electricity-to-water coefficient based on water pump parameters.

8. The method for determining the electricity-to-water coefficient for agricultural irrigation according to claim 1, wherein: The accuracy evaluation index YXZ and the threshold value of the electric water deduction coefficient will be used Compare, threshold ,when When the accuracy level of the output electricity-to-water coefficient for agricultural irrigation is level 2, the electricity-to-water coefficient calculated by the water pump parameters is inaccurate; when When the output agricultural irrigation is at level one, the accuracy level of the electricity-to-water coefficient is calculated through water pump parameters and the electricity-to-water coefficient is accurate.

9. A device for determining the water-to-electricity conversion coefficient for agricultural irrigation, used to execute the method for determining the water-to-electricity conversion coefficient for agricultural irrigation according to claim 1, characterized in that: include: Resistance and loss parameter acquisition module, used to collect resistance and loss parameters; Resistance coefficient analysis module, used to perform correlation analysis on resistance parameters and generate pressure resistance coefficient , kinetic energy resistance coefficient , and conduct correlation analysis on pressure resistance coefficient, kinetic energy resistance coefficient and pumping height to generate comprehensive resistance coefficient ; The water pumping pipe parameter collection module is used to collect water pumping pipe parameters; The friction coefficient analysis module is used to perform correlation analysis on the diameter of the water pumping pipe and the flow rate of the fluid in the water pumping pipe to generate the friction coefficient; Water sample analysis module, used to collect N grayscale photos of water samples, observe and analyze the grayscale photos of water samples, and generate water flow bubble coefficient ; Comprehensive analysis module for friction loss coefficient , comprehensive resistance coefficient , water bubble coefficient Perform correlation analysis to generate the accuracy evaluation index YXZ of the electric water deduction coefficient, and compare the accuracy evaluation index YXZ with the threshold value. Compare and output the accuracy level of agricultural irrigation electricity-to-water coefficient.

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