Intelligent maintenance method for municipal greening plant irrigation system

Abstract

The invention relates to the technical field of irrigation system maintenance, in particular to an intelligent maintenance method for a municipal greening plant irrigation system, which comprises the following steps: acquiring flow data and pressure data; correcting the pressure data at each detection moment according to the flow data at each detection time period to obtain corrected pressure at each detection moment; according to the amplitude and change of the corrected pressure intensity at each detection moment, obtaining the scouring water flow speed at each scouring moment; according to the flushing water flow speed at each flushing moment, the damage degree of the pipeline at each flushing moment is obtained in combination with the time interval between the adjacent flushing moments; the pipeline is replaced according to the damage degree of the pipeline. The blocking degree of the pipeline is analyzed to wash the pipeline according to the change of the flow speed and the pressure intensity at the water dropper, and the damage condition of the pipeline is further evaluated according to the washing effect, so that the pipeline is replaced in time, the irrigation efficiency is improved, and the growth environment of green plants is optimized.

Description

Technical Field

[0001] The present invention relates to the technical field of irrigation system maintenance, and particularly relates to an intelligent maintenance method for a municipal greening plant irrigation system. Background Art

[0002] Irrigation of urban green plants by drip irrigation is a comprehensive solution for efficient resource utilization, healthy management of green plants, and environmental protection. It can not only save water and reduce operating costs, but also improve the greening effect through precise irrigation. To adapt to the layout of green plant planting in the city and ensure the water pressure balance in the drip irrigation system, the pipelines in the drip irrigation system are always tortuous and complex, so the pipelines in the drip irrigation system are prone to blockage.

[0003] To avoid blockage of the pipelines in the drip irrigation system, the traditional method is to periodically increase the water flow velocity in the pipelines for flushing. However, flushing the inside of the pipelines at fixed time intervals does not actually consider the real blockage situation inside the pipelines, that is, flushing the pipeline blockage by increasing the water flow velocity at fixed times lacks pertinence, which will cause waste of resources and is not conducive to the long-term operation and maintenance of the pipelines. Summary of the Invention

[0004] The present invention provides an intelligent maintenance method for a municipal greening plant irrigation system to solve the existing problem: the method of flushing the inside of the pipeline at a fixed time interval to prevent pipeline blockage is not conducive to the long-term operation and maintenance of the pipeline.

[0005] The intelligent maintenance method for a municipal greening plant irrigation system of the present invention adopts the following technical solutions:

[0006] It includes the following steps:

[0007] Obtain the pressure data at each detection moment and the flow data at each detection time period;

[0008] According to the flow data at each detection time period, correct the pressure data at each detection moment to obtain the corrected pressure at each detection moment;

[0009] According to the amplitude and change of the corrected pressure at each detection moment, obtain the necessity of flushing at each detection moment; according to the necessity of flushing at each detection moment, screen out several flushing moments; according to the difference in the corrected pressure between adjacent flushing moments, obtain the flushing water flow velocity at each flushing moment;

[0010] According to the flushing water flow velocity at each flushing moment, combined with the time interval between adjacent flushing moments, obtain the damage degree of the pipeline at each flushing moment; replace the pipeline according to the damage degree of the pipeline.

[0011] Preferably, the method for obtaining the pressure data at each detection moment and the flow rate data at each detection time period specifically includes:

[0012] Install pressure sensors at each drip irrigation orifice of the drip irrigation pipeline and install pressure sensors at each branch pipe; preset a collection time interval α. When using the drip irrigation pipeline to irrigate municipal greening plants, make the pressure sensors detect the pressure data at each drip irrigation orifice every α seconds to obtain the pressure data at each detection moment; according to the flow rate sensors at each branch pipe, collect the flow rate data of each branch pipe within α seconds to obtain the flow rate data at each detection time period.

[0013] Preferably, the method for correcting the pressure data at each detection moment according to the flow rate data at each detection time period to obtain the corrected pressure at each detection moment specifically includes:

[0014] For the i-th detection moment, according to the pressure data at all drip heads at the i-th and the (i - 1)-th detection moments; combined with the flow rate data at all branch pipes at all detection time periods, obtain the corrected pressure at the i-th detection moment. The specific calculation formula is:

[0015] Q i =P i +|P i -P i-1 |×MAX(C i -C i-1 )

[0016] In the formula, Q i represents the corrected pressure at the i-th detection moment; P i represents the average value of the pressure data at all drip heads at the i-th detection moment; P i-1 represents the average value of the pressure data at all drip heads at the i-th detection moment; C i represents the average value of the flow rate data collected by all flow rate sensors during the detection time period from the (i - 1)-th detection moment to the i-th detection moment; C i-1 represents the average value of the flow rate data collected by all flow rate sensors during the detection time period from the (i - 2)-th detection moment to the (i - 1)-th detection moment; MAX() represents the maximum value normalization function; || represents the absolute value function.

[0017] Preferably, the method for obtaining the necessity of flushing at each detection moment according to the amplitude and change of the corrected pressure at each detection moment specifically includes:

[0018] Preset an initial flushing speed γ, take the first detection moment as the first flushing moment, and set the water flow speed in the pipeline to γ meters per second to flush the pipeline;

[0019] Starting from the second detection moment, all detection moments from the second detection moment to the previous flushing moment are recorded as the flushing evaluation time period of the second detection moment. According to the corrected pressure at the detection moments in the flushing evaluation time period of the second detection moment, the necessity of flushing at the second detection moment is obtained.

[0020] Preferably, the obtaining of the necessity of flushing at the second detection moment includes the following specific calculation formula:

[0021]

[0022] In the formula, W2 represents the necessity of flushing at the second detection moment; n2 represents the number of detection moments in the flushing evaluation time period of the second detection moment; Q' 2,u represents the corrected pressure at the u-th detection moment in the flushing evaluation time period of the second detection moment; Q' 2,u-1 represents the corrected pressure at the (u - 1)-th detection moment in the flushing evaluation time period of the second detection moment; Q2 represents the corrected pressure at the second detection moment; MAX() represents the maximum normalization function.

[0023] Preferably, the screening of several flushing moments according to the necessity of flushing at each detection moment includes the following specific method:

[0024] Preset a flushing necessity threshold ε; for any detection moment, if the necessity of flushing at the detection moment is less than or equal to ε, the pipeline is not flushed. If the necessity of flushing at the detection moment is greater than ε, the pipeline is flushed, and the detection moment is recorded as a flushing moment; several flushing moments are obtained.

[0025] Preferably, the obtaining of the flushing water flow velocity at each flushing moment according to the difference in the corrected pressure between adjacent flushing moments includes the following specific method:

[0026] For the v-th flushing moment, according to the difference in the corrected pressure between the v-th flushing moment and the (v - 1)-th flushing moment, the flushing water flow velocity at the (v - 1)-th flushing moment is adjusted to obtain the flushing water flow velocity at the v-th flushing moment.

[0027] Preferably, the obtaining of the flushing water flow velocity at the v-th flushing moment includes the following specific calculation formula:

[0028] V v =V v-1 ×{1+tanh[MAXQ” v -Q” v-1}

[0029] In the formula, V v represents the flushing water flow velocity at the v-th flushing moment; V v-1Denote the scouring water flow velocity at the (v - 1)-th scouring moment; Q” v-1 Denote the corrected pressure at the (v - 1)-th scouring moment; Q” v Denote the corrected pressure at the v-th scouring moment; MAX() denotes the maximum normalization function; tanh[] denotes the hyperbolic tangent function.

[0030] Preferably, obtaining the damage degree of the pipeline at each scouring moment by combining the scouring water flow velocity at each scouring moment with the time interval between adjacent scouring moments includes the following specific method:

[0031] For the v-th scouring moment, obtain the damage degree of the pipeline at the v-th scouring moment according to the time interval between the v-th scouring moment and the (v - 1)-th scouring moment, and the scouring water flow velocity at the v-th scouring moment. The specific calculation formula is:

[0032]

[0033] In the formula, E v Denote the damage degree of the pipeline at the v-th scouring moment; W' v Denote the necessity of scouring at the v-th scouring moment; t v Denote the time interval between the v-th scouring moment and the (v - 1)-th scouring moment; V' denotes the maximum water flow velocity allowed in the pipeline of the irrigation system; V v Denote the scouring water flow velocity at the v-th scouring moment; sigmoid() denotes the sigmoid function.

[0034] Preferably, replacing the pipeline according to the damage degree of the pipeline includes the following specific method:

[0035] Preset a damage degree threshold τ; for the v-th scouring moment; if the damage degree of the pipeline at the v-th scouring moment is greater than or equal to τ, immediately replace the pipeline in the irrigation system.

[0036] The beneficial effects of the technical solution of the present invention are as follows: By analyzing the pressure data at each detection moment and the flow data at each detection time period, the present application corrects the pressure at each detection moment to obtain the corrected pressure at each detection moment, thereby avoiding the interference of the water flow velocity in the pipe on the collected pressure information; further, by analyzing and excluding the pressure information interfered by the water flow velocity in the pipe, evaluating the actual blockage situation inside the pipeline, adaptively setting the scouring moment, it can clean the blocked area more efficiently, save water resources and energy, reduce the wear and damage of the system; finally, based on the data at the scouring moment, analyzing the damage degree of the pipeline, and replacing the pipeline in time to improve the irrigation efficiency and optimize the growth environment of the green plants. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0038] Figure 1 It is a flowchart of the steps of an intelligent maintenance method for a municipal greening plant irrigation system according to the present invention;

[0039] Figure 2 It is a flowchart for flushing and replacing the pipeline. Detailed implementation manners

[0040] In order to further elaborate on the technical means and effects adopted by the present invention to achieve the intended invention purpose, the following, in combination with the drawings and preferred embodiments, will detail the specific implementation manners, structures, features, and effects of an intelligent maintenance method for a municipal greening plant irrigation system according to the present invention. In the following description, different "one embodiment" or "another embodiment" do not necessarily refer to the same embodiment. In addition, the specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs.

[0042] The following will specifically describe the specific solution of an intelligent maintenance method for a municipal greening plant irrigation system provided by the present invention with reference to the drawings.

[0043] Please refer to Figure 1 , which shows a flowchart of the steps of an intelligent maintenance method for a municipal greening plant irrigation system provided by an embodiment of the present invention. The method includes the following steps:

[0044] Step S001: Obtain the pressure data at each detection moment and the flow rate data in each detection time period.

[0045] It should be noted that, as an intelligent maintenance method for a municipal greening plant irrigation system, this embodiment specifically maintains and repairs the system for irrigating municipal green plants, avoids blockage of the pipelines in the irrigation system, and further analyzes the damage degree of the pipelines in the irrigation system, and timely replaces the pipelines in the irrigation system, so as to optimize the growth environment of green plants with irrigation efficiency.

[0046] It should be further noted that the system for irrigating municipal green plants in this embodiment is composed of a head hub, pipelines, drippers, sensors, and a central processor.

[0047] The head hub includes, but is not limited to: water pumps, fertilizer tanks, filters, control and measurement instruments; its functions are to pump water, apply fertilizer, and filter, and send a certain amount of water into the main pipe at a certain pressure;

[0048] The pipeline includes, but is not limited to: main pipes, branch pipes, capillary pipes, and necessary regulating equipment; its function is to evenly transport the pressurized water to the drippers;

[0049] The function of the dripper is to make the water flow drop into the soil in the form of drops when passing through tiny pores. The dripper is usually placed on the soil surface or can also be buried shallowly under the soil;

[0050] The sensor is to install a pressure sensor at the dripper to collect the pressure information at the dripper during drip irrigation, and install a flow sensor at each branch pipe to collect the flow information at the branch pipe during drip irrigation;

[0051] The function of the central processor is to adjust the scouring water flow velocity of the drip irrigation pipeline by analyzing the flow information and pressure information at the dripper during drip irrigation.

[0052] Specifically, install a pressure sensor at each drip irrigation port of the drip irrigation pipeline and install a pressure sensor at each branch pipe; preset a collection time interval α, and the specific value of α can be set by yourself according to the actual situation. There is no hard requirement in this embodiment. In this embodiment, α = 30 is described. When using the drip irrigation pipeline to irrigate municipal greening plants, make the pressure sensor detect the pressure data at each drip irrigation port every α seconds, and obtain the pressure data at each detection moment; according to the flow sensor at each branch pipe, collect the flow data of each branch pipe within α seconds, and obtain the flow data at each detection time period.

[0053] Step S002: Correct the pressure data at each detection moment according to the flow data at each detection time period to obtain the corrected pressure at each detection moment.

[0054] It should be noted that as a method for intelligent maintenance of a municipal greening plant irrigation system in this embodiment, it analyzes and judges the blockage condition of the pipeline in the irrigation system through the pressure information at each dripper; water will seep out from the branch pipes for irrigation, resulting in a reduction in the water volume in the branch pipes, while the main pipe will supply water to the branch pipes, forming water flow, and the volume of the flowing water body is constantly changing, resulting in the pressure information collected at the dripper not being able to represent the real pressure information in the irrigation system. Therefore, in order to more accurately analyze the blockage condition of the pipeline through the pressure information, it is necessary to correct the pressure information affected by the flow rate; the greater the water flow rate in the pipeline of the irrigation system, the smaller the collected pressure will be.

[0055] Preferably, in a specific embodiment of the present invention, for the i-th detection moment, based on the pressure data at all drip heads at the i-th and (i - 1)-th detection moments; combined with the flow rate data at all branch pipes in all detection time periods, the corrected pressure at the i-th detection moment is obtained, and its specific calculation formula is:

[0056] Q i =P i +|P i -P i-1 |×MAX(C i -C i-1 )

[0057] In the formula, Q i represents the corrected pressure at the i-th detection moment; P i represents the average value of the pressure data at all drip heads at the i-th detection moment; P i-1 represents the average value of the pressure data at all drip heads at the i-th detection moment; C i represents the average value of the flow rate data collected by all flow sensors in the detection time period from the (i - 1)-th detection moment to the i-th detection moment; C i-1 represents the average value of the flow rate data collected by all flow sensors in the detection time period from the (i - 2)-th detection moment to the (i - 1)-th detection moment; MAX() represents the maximum value normalization function, and its specific normalization range is (C i -C i-1 ) at all detection moments; || represents the absolute value function.

[0058] Similarly, the corrected pressure at each detection moment is obtained.

[0059] It should be noted that as the water flow rate in the pipeline increases, the pressure collected at the drip head will be on the low side. Therefore, when the increase value of the water flow rate in the adjacent detection time period is larger, the collected pressure data should be increased more, so as to avoid the interference of the water flow rate on the collected pressure information and obtain the corrected pressure; and the corrected pressure represents the pressure information after excluding the interference of the water flow velocity in the pipe; the larger the value of C i -C i-1 , it indicates that the rising amplitude of the water flow rate in the branch pipeline is higher at this time, which in turn causes the pressure data collected at the drip head to be smaller than the true pressure. Therefore, it is more necessary to increase the pressure data collected at the drip head to avoid the influence of the water flow velocity in the pipe on the pressure information.

[0060] Thus, the corrected pressure at each detection moment.

[0061] Step S003: Obtain the necessity of scouring at each detection moment according to the amplitude and variation of the corrected pressure at each detection moment; screen a number of scouring moments according to the necessity of scouring at each detection moment; obtain the scouring water flow velocity at each scouring moment according to the difference in the corrected pressure between adjacent scouring moments.

[0062] It should be noted that since the method of scouring the inside of the pipeline at fixed time intervals does not actually consider the real blockage situation inside the pipeline, that is, increasing the water flow velocity at fixed time to clean the pipeline blockage lacks pertinence, which will cause waste of resources and is not conducive to the long-term operation and maintenance of the pipeline; therefore, in this embodiment, by analyzing and excluding the pressure information after the interference of the water body flow velocity in the pipeline, the real blockage situation inside the pipeline is evaluated, and the scouring moment is adaptively set, which can clean the blocked area more efficiently, save water resources and energy, and reduce the wear and damage of the system. By adjusting the flow velocity in real time, it can flexibly respond to different blockage situations, avoid ineffective scouring, and reduce the operation cost.

[0063] Preferably, in a specific embodiment of the present invention, an initial scouring speed γ is preset. The specific value of γ can be set according to the specific actual situation, and this embodiment does not make a rigid requirement. In this embodiment, γ = 2 is described; the first detection moment is used as the first scouring moment, and the water flow velocity in the pipeline is set to γ meters per second to scour the pipeline;

[0064] Starting from the second detection moment, all detection moments from the second detection moment to the previous scouring moment (including the second detection moment and the previous scouring moment) are recorded as the scouring evaluation time period of the second detection moment. According to the corrected pressure of the detection moments in the scouring evaluation time period of the second detection moment, obtain the necessity of scouring at the second detection moment. The specific calculation formula is:

[0065]

[0066] In the formula, W2 represents the necessity of scouring at the second detection moment; n2 represents the number of detection moments in the scouring evaluation time period of the second detection moment; Q' 2,u represents the corrected pressure of the u-th detection moment in the scouring evaluation time period of the second detection moment; Q' 2,u-1 represents the corrected pressure of the (u - 1)-th detection moment in the scouring evaluation time period of the second detection moment; Q2 represents the corrected pressure of the second detection moment; MAX() represents the maximum normalization function, and its normalization range is the corrected pressure of all detection moments.

[0067] Similarly, obtain the necessity of scouring at each detection moment.

[0068] It should be noted that It represents the pressure change after excluding the interference of water flow velocity. When the larger the value of is, it indicates that the pressure at the drip emitter in the irrigation system is higher, that is, the situation of blockage accumulation is more likely to occur; and when the corrected pressure at the second detection moment is larger, it indicates that the blockage of the drip irrigation by the blockage at this moment is stronger, and it is more necessary to flush the pipeline to remove the blockage. Therefore, it can be used as a basis to judge whether to flush the pipeline at the detection moment.

[0069] Specifically, a flushing necessity threshold ε is preset. The specific value of ε can be set according to the actual situation by itself, and there is no hard requirement in this embodiment. In this embodiment, it is described with ε = 0.8; for any detection moment, if the flushing necessity at the detection moment is less than or equal to ε, the pipeline is not flushed. If the flushing necessity at the detection moment is greater than ε, the pipeline is flushed, and the detection moment is recorded as the flushing moment; several flushing moments are obtained.

[0070] It should be further noted that when flushing the pipeline, if the water flow velocity is simply adjusted to the maximum for flushing, a large amount of water resources will be wasted, and at the same time, the operation burden of the irrigation system will be increased, which is not conducive to the long-term operation and maintenance of the irrigation system; therefore, in this embodiment, the actual pressure information in the pipeline is analyzed to evaluate the blockage degree of the pipeline, and the water flow velocity for flushing the pipeline is adaptively set accordingly.

[0071] Preferably, in a specific embodiment of the present invention, for the v-th flushing moment, according to the difference in the corrected pressure between the v-th flushing moment and the (v - 1)-th flushing moment, the flushing water flow velocity at the (v - 1)-th flushing moment is adjusted as the flushing water flow velocity at the v-th flushing moment, and its specific calculation formula is:

[0072] V v =V v-1 ×{1+tanh[MAX(Q” v -Q” v-1 )]}

[0073] In the formula, V v represents the flushing water flow velocity at the v-th flushing moment; V v-1 represents the flushing water flow velocity at the (v - 1)-th flushing moment; Q” v-1 represents the corrected pressure at the (v - 1)-th flushing moment; Q” v represents the corrected pressure at the v-th flushing moment; MAX() represents the maximum value normalization function, and its normalization range is (Q” v -Q” v-1 ) for all flushing moments; tanh[] represents the hyperbolic tangent function, which is used in this embodiment to normalize MAX(Q” v -Q” v-1) The value mapping is set within the range of [-1, 1].

[0074] It should be noted that for two adjacent scouring times, when the corrected pressure at the latter scouring time is much greater than that at the previous scouring time, it indicates that the degree of blockage of the pipeline corresponding to the latter scouring time is greater, and a greater water flow scouring speed is required to scour the pipeline; otherwise, the pipeline is scoured at a smaller scouring speed.

[0075] Thus, the scouring water flow speed at the scouring time is obtained.

[0076] Step S004: According to the scouring water flow speed at each scouring time and in combination with the time interval between adjacent scouring times, obtain the degree of damage to the pipeline at each scouring time; replace the pipeline according to the degree of damage to the pipeline.

[0077] It should be noted that scouring with water flow can prevent pipeline blockage in the drip irrigation system to a certain extent. Mineral deposits, rust and other stubborn blockages will gradually accumulate inside the pipeline over time, and these stubborn blockages are difficult to remove by water flow scouring. Therefore, to avoid pipeline blockage, the degree of damage to the pipeline is evaluated based on the scouring water flow speed at the scouring time obtained through step S003, the time interval between adjacent scouring times, and the necessity of scouring at the scouring time, and then the pipeline is replaced and maintained in a timely manner, thereby improving irrigation efficiency and optimizing the growth environment of green plants.

[0078] Preferably, in a specific embodiment of the present invention, for the v-th scouring time, according to the time interval between the v-th scouring time and the (v - 1)-th scouring time, and the scouring water flow speed at the v-th scouring time, obtain the degree of damage to the pipeline at the v-th scouring time, and its specific calculation formula is:

[0079]

[0080] In the formula, E v represents the degree of damage to the pipeline at the v-th scouring time; W' v represents the necessity of scouring at the v-th scouring time; t v represents the time interval between the v-th scouring time and the (v - 1)-th scouring time; V' represents the maximum water flow speed allowed in the pipeline of the irrigation system; V v represents the scouring water flow speed at the v-th scouring time; sigmoid() represents the sigmoid function, which is used for normalization processing in this embodiment.

[0081] It should be noted that the larger the value of, the more it indicates that the pipeline needs to be scoured again within a short time after scouring, that is, it indicates that the method of scouring the pipeline is not sufficient to clean the blockage in the pipeline. At the same time The larger the value, the closer the scouring flow velocity is to the maximum water flow velocity allowed in the pipeline of the irrigation system, indicating that the cleaning intensity at this time is closer to the maximum cleaning intensity. Therefore, E v The larger the value indicates that there is still no good cleaning effect when cleaning the pipeline close to the maximum cleaning intensity. Therefore, the pipeline in the irrigation system should be replaced at this time.

[0082] Specifically, a damage degree threshold τ is preset. The specific value of τ can be set according to the actual situation and is not rigidly required in this embodiment. In this embodiment, τ = 0.85 is described. For the v-th scouring moment; if the damage degree of the pipeline at the v-th scouring moment is greater than or equal to τ, the pipeline in the irrigation system should be replaced immediately. If the damage degree of the pipeline at the v-th scouring moment is less than τ, the pipeline should continue to be cleaned by scouring.

[0083] It should be noted that in this embodiment, by analyzing the pressure data at each detection moment and the flow data at each detection time period, the real pressure situation inside the pipeline is obtained to evaluate the real blockage situation inside the pipeline, so as to clean the blocked area, reducing the operation burden of the irrigation system while saving water resources and energy. Finally, based on the data at the scouring moment, the damage degree of the pipeline is analyzed and the pipeline is replaced in time to maintain the municipal green plant irrigation system, thereby improving the irrigation efficiency and optimizing the growth environment of the green plants.

[0084] The flowchart of scouring and replacing the pipeline in this embodiment is as Figure 2 shown Figure 2 and is the flowchart of scouring and replacing the pipeline.

[0085] So far, this embodiment is completed.

[0086] The above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An intelligent maintenance method for a municipal greening plant irrigation system, characterized in that: The method comprises the following steps: Obtain the pressure data at each detection moment and the flow data at each detection time period; Correct the pressure data at each detection moment according to the flow data at each detection time period to obtain the corrected pressure at each detection moment; According to the amplitude and change of the corrected pressure at each detection moment, the necessity of flushing at each detection moment is obtained; according to the necessity of flushing at each detection moment, several flushing moments are screened; according to the difference in the corrected pressure at adjacent flushing moments, the flushing water flow velocity at each flushing moment is obtained; According to the flushing water flow velocity at each flushing moment and the time interval between adjacent flushing moments, the damage degree of the pipeline at each flushing moment is obtained; the pipeline is replaced according to the damage degree of the pipeline.

2. According to claim 1, a method for intelligent maintenance of municipal greening plant irrigation system is characterized in that: The specific method of obtaining the pressure data at each detection moment and the flow data at each detection time period includes: A pressure sensor is installed at each drip irrigation outlet of the drip irrigation pipeline, and a pressure sensor is installed at each branch pipe; A collection time interval α is preset. When drip irrigation pipes are used to irrigate municipal green plants, the pressure sensor is used to detect the pressure data at each drip irrigation port every α seconds to obtain the pressure data at each detection moment; the flow sensor at each branch pipe collects the flow data of each branch pipe within α seconds to obtain the flow data in each detection time period.

3. According to claim 1, a method for intelligent maintenance of municipal greening plant irrigation system is characterized in that: The method of correcting the pressure data at each detection moment according to the flow data at each detection time period to obtain the corrected pressure at each detection moment includes: For the i-th detection time, according to the pressure data at all drippers at the i-th and i-1-th detection times; combined with the flow data at all branches in all detection time periods, the corrected pressure at the i-th detection time is obtained. The specific calculation formula is: Q i =P i +|P i -P i-1 |×MAX(C i -C i-1 ) In the formula, Q i represents the corrected pressure at the i-th detection moment; P i represents the mean value of the pressure data at all drippers at the i-th detection time; P i-1 represents the mean value of the pressure data at all drippers at the i-th detection time; C i represents the mean value of the flow data collected by all flow sensors in the detection time period from the i-1th detection time to the i-th detection time; C i-1 It represents the mean value of the flow data collected by all flow sensors in the detection time period from the i-2th detection time to the i-1th detection time; MAX() represents the maximum value normalization function; || represents the absolute value function.

4. According to claim 1, a municipal greening plant irrigation system intelligent maintenance method is characterized in that: The method of obtaining the necessity of flushing at each detection moment according to the amplitude and change of the corrected pressure at each detection moment includes: An initial flushing speed γ is preset, the first detection moment is taken as the first flushing moment, and the water flow speed in the pipeline is set to γ ​​meters per second to flush the pipeline; Starting from the second detection moment, all detection moments from the second detection moment to the previous flushing moment are recorded as the flushing evaluation time period of the second detection moment, and the necessity of flushing at the second detection moment is obtained according to the corrected pressure at the detection moment in the flushing evaluation time period of the second detection moment.

5. According to claim 4, a method for intelligent maintenance of municipal greening plant irrigation system is characterized in that: The specific calculation formula for obtaining the necessity of flushing at the second detection moment is: Where W2 represents the necessity of flushing at the second detection moment; n2 represents the number of detection moments in the flushing evaluation period at the second detection moment; Q' 2,u represents the corrected pressure at the uth detection time in the flushing evaluation period of the second detection time; Q' 2,u-1 represents the corrected pressure at the u-1th detection moment in the flushing evaluation time period of the second detection moment; Q2 represents the corrected pressure at the second detection moment; MAX() represents the maximum value normalization function.

6. According to claim 1, a method for intelligent maintenance of municipal greening plant irrigation system, characterized in that: The method of screening and obtaining a number of flushing moments according to the necessity of flushing at each detection moment includes: A flushing necessity threshold ε is preset; for any detection moment, if the flushing necessity at the detection moment is less than or equal to ε, the pipeline is not flushed; if the flushing necessity at the detection moment is greater than ε, the pipeline is flushed and the detection moment is recorded as the flushing moment; a number of flushing moments are obtained.

7. The intelligent maintenance method of a municipal greening plant irrigation system according to claim 4, characterized in that: The specific method of obtaining the flushing water flow velocity at each flushing moment according to the difference in corrected pressures at adjacent flushing moments is as follows: For the vth flushing moment, according to the difference in corrected pressure between the vth flushing moment and the v-1th flushing moment, the flushing water flow velocity at the v-1th flushing moment is adjusted to obtain the flushing water flow velocity at the vth flushing moment.

8. The intelligent maintenance method of a municipal greening plant irrigation system according to claim 7, characterized in that: The specific calculation formula for obtaining the flushing water flow velocity at the vth flushing moment is: V v =V v-1 ×{1+tanh[MAX(Q″ v -Q″ v-1 )]} Where V v represents the flushing water velocity at the vth flushing moment; V v-1 Indicates the flushing water flow velocity at the v-1th flushing moment; Q" v-1 Indicates the corrected pressure at the v-1th flushing moment; Q" v represents the corrected pressure at the vth flushing moment; MAX( ) represents the maximum value normalization function; tanh[ ] represents the hyperbolic tangent function.

9. The intelligent maintenance method of a municipal greening plant irrigation system according to claim 1, characterized in that: The method of obtaining the damage degree of the pipeline at each flushing moment according to the flushing water flow velocity at each flushing moment and the time interval between adjacent flushing moments includes the following specific methods: For the vth flushing moment, according to the time interval between the vth flushing moment and the v-1th flushing moment, and the flushing water flow velocity at the vth flushing moment, the damage degree of the pipeline at the vth flushing moment is obtained. The specific calculation formula is: In the formula, E v Indicates the damage degree of the pipeline at the vth flushing moment; W' v represents the necessity of flushing at the vth flushing moment; t v represents the time interval between the vth flushing moment and the v-1th flushing moment; V' represents the maximum water flow velocity allowed in the pipe of the irrigation system; V v represents the flushing water flow velocity at the vth flushing moment; sigmoid() represents the sigmoid function.

10. The intelligent maintenance method of municipal greening plant irrigation system according to claim 1, characterized in that: The specific method of replacing the pipeline according to the degree of damage of the pipeline includes: A damage threshold τ is preset; for the vth flushing moment; if the damage degree of the pipeline at the vth flushing moment is greater than or equal to τ, the pipeline in the irrigation system is immediately replaced.

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