Method and device for determining the coefficient of electrical conversion to water for agricultural irrigation

Abstract

This invention provides a method and apparatus for determining the electro-hydraulic coefficient in agricultural irrigation, relating to the field of agricultural irrigation technology. The invention analyzes how the equivalent flow velocity of water is affected by various factors, including the roughness of the pipe interior, the water level and pressure at the pumping end, and the potential energy difference. These factors all affect pumping efficiency. Furthermore, the more air bubbles in the water, the lower the pumping efficiency. Pumping efficiency affects the accuracy of the electro-hydraulic coefficient calculation. The invention collects relevant resistance parameters, pumping pipe parameters, and grayscale images of water samples, and performs correlation analysis to generate a comprehensive resistance coefficient, a kinetic resistance coefficient, and a water flow bubble coefficient reflecting the bubble content. Further analysis generates an electro-hydraulic coefficient accuracy assessment index reflecting the accuracy of the method for calculating the electro-hydraulic coefficient using pump parameters, and outputs the accuracy level of determining the electro-hydraulic coefficient for agricultural irrigation.

Description

Technical Field

[0001] This invention relates to the field of agricultural irrigation technology, specifically to a method and apparatus for determining the electro-water conversion factor in agricultural irrigation. Background Technology

[0002] "Electricity-to-water conversion" is an innovative agricultural irrigation management method that estimates irrigation water consumption primarily by measuring the electricity consumption of water pumps. The core of this method lies in studying the relationship between electricity consumption and water extraction, establishing a hydroelectricity-to-water conversion coefficient. This coefficient allows for the accurate conversion of electrical energy consumption into actual water extraction. Specifically, when a water pump is running, its electricity consumption and pumping volume exhibit a certain proportional relationship. Through in-depth analysis of this relationship, a hydroelectricity-to-water conversion coefficient applicable to specific irrigation equipment and water sources can be determined. Water consumption can then be calculated from electricity consumption. This method improves the scientific rigor and accuracy of irrigation and effectively avoids water waste caused by human error.

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

[0004] The information disclosed in the background section is only intended to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0005] The purpose of this invention is to provide a method and apparatus for determining the electro-water conversion factor in agricultural irrigation, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] The method for determining the electro-water conversion factor in agricultural irrigation includes the following steps:

[0008] S1. Water is pumped out and transported to the irrigation area for irrigation, and resistance parameters are collected during the irrigation process. The resistance parameters include fluid pressure, fluid velocity in the pumping pipe, and pumping height.

[0009] S2. Perform correlation analysis on the resistance parameters to generate the pressure resistance coefficient. Kinetic energy dissipation coefficient Furthermore, a correlation analysis was conducted on the pressure resistance coefficient, kinetic energy resistance coefficient, and pumping height to generate a comprehensive resistance coefficient. The overall resistance coefficient is a coefficient used to reflect the amount of energy required to draw fluid from the pumping end of the pumping pipe to the pump.

[0010] S3. Collect pumping pipe parameters, including the pumping pipe diameter and the pumping pipe inner wall roughness.

[0011] S4. Perform a correlation analysis on the diameter of the pumping pipe and the fluid velocity inside the pumping pipe to generate the friction loss coefficient. A coefficient used to reflect the amount of energy required to overcome the roughness of the pipe wall in order to draw fluid from the pumping end of the pipe to the pump.

[0012] S5. During operation, collect N grayscale photos of the water sample, observe and analyze the grayscale photos, and generate the water flow bubble coefficient. The water flow bubble coefficient is used to reflect the bubble content coefficient in the extracted water.

[0013] S6, regarding the friction loss coefficient Overall resistance coefficient Water flow bubble coefficient Correlation analysis was performed to generate the accuracy evaluation index YXZ of the electro-water conversion coefficient. The accuracy evaluation index YXZ of the electro-water conversion coefficient is used to reflect the accuracy of the electro-water conversion coefficient method calculated by pump parameters.

[0014] S7. The accuracy evaluation index YXZ based on the electro-water conversion coefficient will be compared with the threshold. The comparison is performed to output the accuracy level of agricultural irrigation based on the electricity-to-water conversion coefficient.

[0015] Furthermore, in S1, the fluid pressure P is the water pressure at the pumping end of the pumping pipe, which is obtained by measuring a pressure gauge; the fluid velocity v is the water flow velocity in the pumping pipe during pumping, which is obtained by measuring 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.

[0016] Furthermore, a correlation analysis was performed on the fluid pressure P to generate the pressure dissipation coefficient. The formula used is: ;

[0017] in, To determine the density of the water being pumped, For gravitational acceleration, pressure loss coefficient A coefficient used to reflect the magnitude of the potential energy due to pressure that needs to be overcome to draw water from the pumping end of the pump pipe to the pump.

[0018] Correlation analysis was performed on the fluid velocity v to generate the kinetic energy dissipation coefficient. The formula used is:

[0019] ;

[0020] Among them, the kinetic energy dissipation coefficient A coefficient used to reflect the magnitude of the kinetic energy due to the flow velocity that needs to be overcome to draw water from the pumping end of the pumping pipe to the pump.

[0021] A correlation analysis was conducted on the pressure resistance coefficient, kinetic energy resistance coefficient, and pumping height to generate a comprehensive resistance coefficient. The formula used is:

[0022] ;

[0023] in, As the flow rate weighting factor, As a pressure weighting factor, Overall resistance coefficient A coefficient used to reflect the amount of energy required to draw water from the pumping end of the pump pipe to the pump.

[0024] Furthermore, in step S3, the roughness of the inner wall of the pumping pipe is collected, including the average roughness. The maximum roughness Rz, and the average roughness of the pipe inner wall are measured using a stylus-type roughness measuring instrument. And the maximum roughness Rz.

[0025] Furthermore, regarding the diameter of the water pumping pipe... Flow velocity of fluid in the pumping pipe Correlation analysis was performed to generate the friction loss coefficient. The formula used is:

[0026] ;

[0027] 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 upon which the value of is based is:

[0028] ;

[0029] in, Roughness coefficient , The Reynolds number is calculated using the following formula: , This refers to the viscosity of the fluid, specifically the viscosity of the water being pumped through the pump pipe. The velocity of the 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 extracted water.

[0030] Further, in step S5, N grayscale photos of the water sample in the pumping area are taken by a camera. The pixel resolution of each grayscale photo is 1920x1080. Each grayscale photo is observed, and the... The number of bubble pixels in the grayscale photo of Zhang water sample is: The number of pixels and bubble pixels in the grayscale image of the water sample. Correlation analysis was performed to generate the water flow bubble coefficient. The formula used is:

[0031] ;

[0032] Water flow bubble coefficient A coefficient used to reflect the bubble content in the extracted water.

[0033] Furthermore, regarding the friction loss coefficient Overall resistance coefficient Water flow bubble coefficient Correlation analysis was performed to generate the YXZ index, which is used to evaluate the accuracy of the electro-water conversion coefficient. The formula used is as follows:

[0034] ;

[0035] The YXZ index, used to evaluate the accuracy of the electro-water conversion factor method, is used to reflect the accuracy of the electro-water conversion factor method calculated using pump parameters.

[0036] Furthermore, the accuracy evaluation index YXZ of the electro-water conversion coefficient will be compared with the threshold. Compare and set thresholds. ,when At that time, the accuracy level of the output agricultural irrigation based on the electro-water conversion coefficient was level two, and the calculation based on the water pump parameters based on the electro-water conversion coefficient was inaccurate; when At that time, the output of agricultural irrigation is based on the accuracy level of the electro-water conversion coefficient, which is level one, and the calculation of water pump parameters is based on the accuracy of the electro-water conversion coefficient.

[0037] The present invention also proposes an apparatus for determining the electro-water conversion factor of agricultural irrigation, used to perform a method for determining the electro-water conversion factor of agricultural irrigation, comprising:

[0038] The resistance parameter acquisition module is used to acquire resistance parameters;

[0039] The resistance coefficient analysis module is used to perform correlation analysis on resistance parameters and generate pressure resistance coefficients. Kinetic energy dissipation coefficient Furthermore, a correlation analysis was conducted on the pressure resistance coefficient, kinetic energy resistance coefficient, and pumping height to generate a comprehensive resistance coefficient. ;

[0040] Pumping pipe parameter acquisition module, used to acquire pumping pipe parameters;

[0041] The friction loss coefficient analysis module is used to perform correlation analysis on the diameter of the pumping pipe and the fluid velocity inside the pumping pipe to generate the friction loss coefficient.

[0042] The water sample analysis module is used to acquire N grayscale photos of water samples, observe and analyze these photos, and generate a water flow bubble coefficient. ;

[0043] The comprehensive analysis module is used to analyze the friction loss coefficient. Overall resistance coefficient Water flow bubble coefficient Correlation analysis was performed to generate the accuracy evaluation index YXZ based on the electro-water conversion coefficient, and the accuracy evaluation index YXZ based on the electro-water conversion coefficient was compared with a threshold. The comparison is performed to output the accuracy level of agricultural irrigation based on the electricity-to-water conversion coefficient.

[0044] Compared with the prior art, the beneficial effects of the present invention are:

[0045] This invention analyzes the effects of various factors on the equivalent flow velocity of a water pump during pumping, including the roughness of the pipe interior, the water level and pressure at the pumping end, and the potential energy difference. These factors all affect pumping efficiency. Furthermore, the more air bubbles in the water, the lower the pumping efficiency. Since pumping efficiency affects the accuracy of the electro-hydrometric coefficient calculation, relevant resistance parameters, pumping pipe parameters, and water sample grayscale images are collected and correlation analysis is performed. This generates a comprehensive resistance coefficient reflecting the energy required to draw fluid from the pumping end to the pump, a kinetic energy resistance coefficient reflecting the kinetic energy due to flow velocity, and a water bubble coefficient reflecting the air bubble content. Further analysis generates an electro-hydrometric coefficient accuracy assessment index reflecting the accuracy of the electro-hydrometric coefficient calculation method based on pump parameters, and outputs the accuracy level for agricultural irrigation determined by the electro-hydrometric coefficient. Attached Figure Description

[0046] Figure 1 This is a schematic diagram of the overall method flow of the present invention;

[0047] Figure 2 This is a schematic diagram of the overall system flow of the present invention;

[0048] Figure 3 This is a fitting curve of the comprehensive resistance coefficient and accuracy evaluation index of the present invention;

[0049] Figure 4 This is a fitting curve of the friction loss coefficient and accuracy evaluation index of the present invention;

[0050] Figure 5 This is a fitting curve of the water flow bubble coefficient-accuracy evaluation index of the present invention. Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments.

[0052] It should be noted that, unless otherwise defined, the technical or scientific terms used in this invention should have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0053] Example:

[0054] Please see Figure 1 The present invention provides a technical solution:

[0055] Agricultural irrigation uses an electro-hydraulic conversion factor, which is the ratio of power consumption to water volume. Since power consumption is the product of power and time, and water volume is the product of pumping speed and time, the electro-hydraulic conversion factor is used to determine the ratio of pump power to pumping speed. However, during pumping, the equivalent flow velocity is affected by various factors, including the roughness of the pipe interior, water level and pressure at the pumping end, and potential energy difference. These factors all affect pumping efficiency. Furthermore, the more air bubbles in the water, the lower the pumping efficiency. Pumping efficiency affects the accuracy of the electro-hydraulic conversion factor calculation. This invention analyzes relevant data, and the specific steps include:

[0056] S1: In order to analyze the influence of water level pressure and potential energy difference at the pumping end on the calculation of electric water, water is pumped out 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 velocity in the pumping pipe, and pumping height. The pumping end is the end of the pumping pipe away from the water pump.

[0057] S2: Perform correlation analysis on the resistance parameters to generate the pressure resistance coefficient. Kinetic energy dissipation coefficient Furthermore, a correlation analysis was conducted on the pressure resistance coefficient, kinetic energy resistance coefficient, and pumping height to generate a comprehensive resistance coefficient. The overall resistance coefficient is a coefficient used to reflect the amount of energy required to draw fluid from the pumping end of the pumping pipe to the pump.

[0058] Fluid pressure P is the water pressure at the pumping end of the pumping pipe, which is measured by a pressure gauge. Fluid velocity v is the water flow velocity in the pumping pipe during pumping, which is measured by a flow meter. Pumping height H is the vertical height difference between the pumping end of the pumping pipe and the water pump.

[0059] Correlation analysis was performed on the fluid pressure P to generate the pressure loss coefficient. The formula used is: ;

[0060] in, To determine the density of the water being pumped, For gravitational acceleration, pressure loss coefficient The pressure resistance coefficient is a coefficient used to reflect the magnitude of the potential energy required to draw water from the pumping end of the pipe to the pump. The larger the value, the greater the impact on pumping efficiency.

[0061] Correlation analysis was performed on the fluid velocity v to generate the kinetic energy dissipation coefficient. The formula used is:

[0062] ;

[0063] Among them, the kinetic energy dissipation coefficient The coefficient used to reflect the kinetic energy of water flow that needs to be overcome due to its velocity when drawing water from the pump end of the pipe to the pump. The kinetic energy is directly proportional to the square of the flow velocity; the higher the velocity, the greater the kinetic energy. This means that fast-flowing fluids have higher energy content, and the pump needs to overcome more resistance. (Kinetic energy loss coefficient) The larger the value, the greater the impact on pumping efficiency.

[0064] A correlation analysis was conducted on the pressure resistance coefficient, kinetic energy resistance coefficient, and pumping height to generate a comprehensive resistance coefficient. The formula used is:

[0065] ;

[0066] Kinetic energy dissipation coefficient The larger the value, the greater the impact on pumping efficiency during pumping; the pressure resistance coefficient. The larger the value of H, the greater the impact on pumping efficiency. Similarly, the larger the value of H (pumping height), the greater the impact on pumping efficiency. (This is related to the overall kinetic energy loss coefficient.) Pressure resistance coefficient The pumping height H is analyzed to generate a comprehensive resistance coefficient. Overall resistance coefficient A coefficient used to reflect the amount of energy required to draw water from the pumping end of the pump pipe to the pump, wherein, The velocity weighting factor reflects the degree to which the water flow velocity in the pipe contributes to the water loss during pumping. This is the pressure weighting factor, which reflects the extent to which the pressure difference that needs to be overcome during pumping contributes to the losses. The greater the fluid velocity v, the greater the velocity weighting factor.

[0067] S3: Collect pumping pipe parameters, including the pumping pipe diameter and the pumping pipe inner wall roughness;

[0068] The roughness of the inner wall of the pumping pipe is collected, including the average roughness. The maximum roughness Rz, and the average roughness of the pipe inner wall are measured using a stylus-type roughness measuring instrument. And the maximum roughness Rz. Specifically, place the stylus at the measurement point on the inner wall of the pipe, ensuring the stylus is perpendicular to the inner wall; start the instrument, and the stylus will rotate and move along the inner wall, recording the surface fluctuation data; the difference between the maximum and minimum values ​​of the fluctuation data is the maximum roughness Rz. Subtracting the minimum value from all data and then averaging the results gives the average roughness. .

[0069] S4: To analyze the impact of the roughness inside the pumping pipe on the pumping efficiency, a correlation analysis was performed on the pipe diameter and the fluid velocity inside the pipe to generate the friction loss coefficient. A coefficient used to reflect the amount of energy required to overcome the roughness of the pipe wall in order to draw fluid from the pumping end of the pipe to the pump.

[0070] For the diameter of the water pumping pipe Flow velocity of fluid in the pumping pipe Correlation analysis was performed to generate the friction loss coefficient. The formula used is:

[0071] ;

[0072] 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 upon which the value of is based is:

[0073] ;

[0074] in, Roughness coefficient , The Reynolds number is calculated using the following formula: , This refers to the viscosity of the fluid, specifically the viscosity of the water being pumped through the pump pipe. The velocity of the water in the water area where the pumping end of the pumping pipe is located. The Reynolds number reflects the flow state of the pumped water. Frictional resistance coefficient. The larger the value, the greater the impact on pumping efficiency.

[0075] S5: To determine the size and content of air bubbles in the water, N grayscale photos of the water sample are collected during the operation. These photos are then observed and analyzed to generate a water flow bubble coefficient. The water flow bubble coefficient reflects the bubble content in the extracted water. N grayscale photos of the water sample in the pumping area are taken using a camera. Each grayscale photo has a pixel resolution of 1920x1080. Each photo is observed. The N photos are sorted and indexed using i, where i can be 1, 2, 3, ..., N. 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 grayscale image of the water sample. Correlation analysis was performed to generate the water flow bubble coefficient. The formula used is:

[0076] ;

[0077] Water flow bubble coefficient The coefficient is used to reflect the bubble content in the extracted water. If there are bubbles in the water, the water pump will affect the flow of water and reduce the pumping speed. The more bubbles there are, the greater the impact on the accuracy of the electro-water conversion coefficient assessment.

[0078] S6: Friction resistance coefficient Overall resistance coefficient Water flow bubble coefficient Correlation analysis was performed to generate the accuracy evaluation index YXZ of the electro-water conversion coefficient. The accuracy evaluation index YXZ of the electro-water conversion coefficient is used to reflect the accuracy of the electro-water conversion coefficient method calculated by pump parameters.

[0079] Regarding the friction loss coefficient Overall resistance coefficient Water flow bubble coefficient Correlation analysis was performed to generate the YXZ index, which is used to evaluate the accuracy of the electro-water conversion coefficient. The formula used is as follows:

[0080] ;

[0081] Overall resistance coefficient Frictional resistance coefficient All these reflect the magnitude of the resistance overcoming coefficient. The larger the value, the greater the resistance that needs to be overcome during pumping, and the greater the impact on the accuracy of the electro-water conversion coefficient assessment. (Water flow bubble coefficient) The larger the value, the more bubbles there are. When the water pump is pumping water, it will affect the flow of water and reduce the pumping speed. The greater the impact on the accuracy assessment of the electro-water conversion factor, the more accurate the electro-water conversion factor assessment index YXZ is used to reflect the accuracy of the electro-water conversion factor method calculated from water pump parameters.

[0082] Table 1: Experimental Statistical Data of Friction Loss Coefficient, Overall Loss Coefficient, and Water Bubble Coefficient

[0083]

[0084] Reference Figures 3-5 These are the fitting curves of the comprehensive resistance coefficient, frictional resistance coefficient, and water flow bubble coefficient to the accuracy evaluation index. From the graphs, it can be seen that the larger the values ​​of the comprehensive resistance coefficient and frictional resistance coefficient, the larger the accuracy evaluation index of the electro-water conversion coefficient, and the larger the water flow bubble coefficient, the larger the accuracy evaluation index of the electro-water conversion coefficient. All of these are positively correlated.

[0085] S7: The accuracy evaluation index YXZ and threshold will be based on the electro-water conversion coefficient. The comparison is performed to output the accuracy level of agricultural irrigation based on the electricity-to-water conversion coefficient.

[0086] The accuracy evaluation index YXZ and threshold will be based on the electro-water conversion coefficient. Compare and set thresholds. ,when At that time, the accuracy level of the electricity-to-water conversion factor for agricultural irrigation output was level two. Calculations based on pump parameters using the electricity-to-water conversion factor were inaccurate, and the ratio of power consumption to pumping volume could not be used to calculate the electricity-to-water conversion factor. When the output of agricultural irrigation is based on the accuracy level of the electricity-to-water conversion factor, and the accuracy is calculated by the water pump parameters based on the electricity-to-water conversion factor, the ratio between power consumption and water pumping volume can be used to calculate the electricity-to-water conversion factor.

[0087] Please see Figure 2 The present invention also proposes an apparatus for determining the electric-to-water conversion factor for agricultural irrigation, used to perform a method for determining the electric-to-water conversion factor for agricultural irrigation, comprising:

[0088] The resistance parameter acquisition module is used to acquire resistance parameters;

[0089] The resistance coefficient analysis module is used to perform correlation analysis on resistance parameters and generate pressure resistance coefficients. Kinetic energy dissipation coefficient Furthermore, a correlation analysis was conducted on the pressure resistance coefficient, kinetic energy resistance coefficient, and pumping height to generate a comprehensive resistance coefficient. ;

[0090] Pumping pipe parameter acquisition module, used to acquire pumping pipe parameters;

[0091] The friction loss coefficient analysis module is used to perform correlation analysis on the diameter of the pumping pipe and the fluid velocity inside the pumping pipe to generate the friction loss coefficient.

[0092] The water sample analysis module is used to acquire N grayscale photos of water samples, observe and analyze these photos, and generate a water flow bubble coefficient. ;

[0093] The comprehensive analysis module is used to analyze the friction loss coefficient. Overall resistance coefficient Water flow bubble coefficient Correlation analysis was performed to generate the accuracy evaluation index YXZ based on the electro-water conversion coefficient, and the accuracy evaluation index YXZ based on the electro-water conversion coefficient was compared with a threshold. The comparison is performed to output the accuracy level of agricultural irrigation based on the electricity-to-water conversion coefficient.

[0094] The above formulas are all dimensionless calculations. The formulas are derived from software simulations based on a large amount of collected data to obtain the most recent real-world results. The preset parameters in the formulas are set by those skilled in the art according to the actual situation.

[0095] The above embodiments can be implemented, in whole or in part, by software, hardware, firmware, or any other combination thereof. When implemented in software, the above embodiments can be implemented, in whole or in part, as a computer program product. Those skilled in the art will recognize that the units and algorithm steps of the various examples 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 implemented in hardware or software depends on the specific application and design constraints of the technical solution.

[0096] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment, depending on actual needs.

[0097] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application.

Claims

1. A method for determining the electro-water conversion factor in agricultural irrigation, characterized in that, The specific steps include: S1. Water is pumped out and transported to the irrigation area for irrigation, and resistance parameters are collected during the irrigation process. The resistance parameters include fluid pressure, fluid velocity in the pumping pipe, and pumping height. S2. Perform correlation analysis on the resistance parameters to generate pressure resistance coefficient and kinetic energy resistance coefficient. Perform 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 amount of energy required to draw fluid from the pumping end of the pumping pipe to the pump. S3. Collect pumping pipe parameters, including the pumping pipe diameter and the pumping pipe inner wall roughness. S4. Perform a correlation analysis on the diameter of the pumping pipe and the fluid velocity inside the pumping pipe to generate a friction loss coefficient. The friction loss coefficient is used to reflect the amount of energy required to overcome the roughness of the inner wall of the pipe in order to pump the fluid from the pumping end of the pumping pipe to the pump. S5. During operation, N grayscale photos of the water sample are collected. 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. S6. Conduct correlation analysis on the friction loss coefficient, comprehensive loss coefficient, and water flow bubble coefficient to generate the electro-water conversion coefficient accuracy evaluation index YXZ. The electro-water conversion coefficient accuracy evaluation index YXZ is used to reflect the accuracy of the electro-water conversion coefficient method calculated through water pump parameters. S7. Compare the accuracy evaluation index YXZ of the electro-water conversion coefficient with the threshold, and output the accuracy level of agricultural irrigation in terms of the electro-water conversion coefficient.

2. The method for determining the electro-water conversion factor for agricultural irrigation according to claim 1, characterized in that: 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 velocity v is the water flow velocity 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 electro-water conversion factor for agricultural irrigation according to claim 2, characterized in that: Correlation analysis was performed on the fluid pressure P to generate the pressure loss coefficient. The formula used is: ; in, To determine the density of the water being pumped, For gravitational acceleration, pressure loss coefficient A coefficient used to reflect the magnitude of the potential energy due to pressure that needs to be overcome to draw water from the pumping end of the pump pipe to the pump. Correlation analysis was performed on the fluid velocity v to generate the kinetic energy dissipation coefficient. The formula used is: ； Among them, the kinetic energy dissipation coefficient A coefficient used to reflect the magnitude of the kinetic energy due to the flow velocity that needs to be overcome to draw water from the pumping end of the pumping pipe to the pump. A correlation analysis was conducted on the pressure resistance coefficient, kinetic energy resistance coefficient, and pumping height to generate a comprehensive resistance coefficient. The formula used is: ； in, As the flow rate weighting factor, As a pressure weighting factor, Overall resistance coefficient A coefficient used to reflect the amount of energy required to draw water from the pumping end of the pump pipe to the pump.

4. The method for determining the electro-water conversion factor for agricultural irrigation according to claim 3, characterized in that: In step S3, the roughness of the inner wall of the pumping pipe is collected, including the average roughness. The maximum roughness Rz, and the average roughness of the pipe inner wall are measured using a stylus-type roughness measuring instrument. And the maximum roughness Rz.

5. The method for determining the electro-water conversion factor for agricultural irrigation according to claim 4, characterized in that: For the diameter of the water pumping pipe Flow velocity of fluid in the pumping pipe Correlation analysis was performed to generate the friction loss coefficient. The formula used is: ； 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 upon which the value of is based is: ； in, Roughness coefficient , The Reynolds number is calculated using the following formula: , This refers to the viscosity of the fluid, specifically the viscosity of the water being pumped through the pump pipe. The velocity of the water in the area where the pumping pipe is located. The Reynolds number is used to reflect the flow state of the extracted water.

6. The method for determining the electro-water conversion factor for agricultural irrigation according to claim 1, characterized in that: In step S5, N grayscale photos of water samples from the pumping area are taken using a camera. Each grayscale photo has a pixel resolution of 1920x1080. Each grayscale photo is then observed. The first... The number of bubble pixels in the grayscale photo of Zhang water sample is: The number of pixels and bubble pixels in the grayscale image of the water sample. Correlation analysis was performed to generate the water flow bubble coefficient. The formula used is: ； Water flow bubble coefficient A coefficient used to reflect the bubble content in the extracted water.

7. The method for determining the electro-water conversion factor for agricultural irrigation according to claim 1, characterized in that: Regarding the friction loss coefficient Overall resistance coefficient Water flow bubble coefficient Correlation analysis was performed to generate the YXZ index, which is used to evaluate the accuracy of the electro-water conversion coefficient. The formula used is as follows: ； The YXZ index, used to evaluate the accuracy of the electro-water conversion factor method, is used to reflect the accuracy of the electro-water conversion factor method calculated using pump parameters.

8. The method for determining the electro-water conversion factor for agricultural irrigation according to claim 1, characterized in that: The accuracy evaluation index YXZ and threshold will be based on the electro-water conversion coefficient. Compare and set thresholds. ,when At that time, the accuracy level of the output agricultural irrigation based on the electro-water conversion coefficient was level two, and the calculation based on the water pump parameters based on the electro-water conversion coefficient was inaccurate; when At that time, the output of agricultural irrigation is based on the accuracy level of the electro-water conversion coefficient, which is level one, and the calculation of water pump parameters is based on the accuracy of the electro-water conversion coefficient.

9. An apparatus for determining the electro-water conversion factor for agricultural irrigation, used to perform the method for determining the electro-water conversion factor for agricultural irrigation as described in claim 1, characterized in that, include: The resistance parameter acquisition module is used to acquire resistance parameters; The resistance coefficient analysis module is used to perform correlation analysis on resistance parameters and generate pressure resistance coefficients. Kinetic energy dissipation coefficient Furthermore, a correlation analysis was conducted on the pressure resistance coefficient, kinetic energy resistance coefficient, and pumping height to generate a comprehensive resistance coefficient. ; Pumping pipe parameter acquisition module, used to acquire pumping pipe parameters; The friction loss coefficient analysis module is used to perform correlation analysis on the diameter of the pumping pipe and the fluid velocity inside the pumping pipe to generate the friction loss coefficient. The water sample analysis module is used to acquire N grayscale photos of water samples, observe and analyze these photos, and generate a water flow bubble coefficient. ; The comprehensive analysis module is used to analyze the friction loss coefficient. Overall resistance coefficient Water flow bubble coefficient Correlation analysis was performed to generate the accuracy evaluation index YXZ based on the electro-water conversion coefficient, and the accuracy evaluation index YXZ based on the electro-water conversion coefficient was compared with a threshold. The comparison is performed to output the accuracy level of agricultural irrigation based on the electricity-to-water conversion coefficient.

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