A data extraction and automatic modeling method and system for water supply and drainage drawings

Abstract

The present application relates to the field of data processing technology, and specifically to a method and system for data extraction and automatic modeling of water supply and drainage drawings. The method includes: obtaining the connectivity of the pipeline, internal information and water flow of the main pipeline; obtaining the upstream and downstream water flow diversion degree according to the height ratio and radius of the diversion pipeline corresponding to the upstream pipeline and downstream pipeline connected to the secondary pipeline and the upstream and downstream pipelines, and obtaining the estimated water flow of the secondary pipeline in combination with the water flow of the upstream and downstream pipelines; obtaining the connected pipelines of the pipeline, obtaining the water flow acceptance of the pipeline based on the water flow of the connected pipeline, and obtaining the water flow trend consistency of the pipeline according to the specification characteristics of all connected pipelines corresponding to the pipeline; combining the estimated water flow value and the water flow trend consistency to obtain the water flow pressure expression of the pipeline; marking it in the model to complete the final modeling. The present application displays the water flow pressure status of each pipeline, which is helpful for the improvement and optimization of the model.

Description

Technical Field

[0001] The present application relates to the technical field of data processing, and in particular to a method and system for data extraction and automatic modeling of water supply and drainage drawings. Background Art

[0002] Water supply and sewerage models are key tools for water planning and management. They help engineers and decision makers understand the dynamic behavior of the system, evaluate the impact of different scenarios, and perform risk assessment and emergency management.

[0003] In the data extraction and automatic construction of drainage drawings, the water supply and drainage models currently constructed are more static 3D models, which are mainly used for visualization and display purposes to accurately display the 3D form of the water supply and drainage system. In this case, in the water supply and drainage analysis model of the relevant area, due to the lack of intuitive analysis and prediction of the pressure conditions of the pipelines caused by the water flow, the degree of influence of the real-time water flow conditions of the pipelines in the relevant area on the internal conditions of the pipelines is unclear, and it is impossible to determine which pipelines are most affected, which in turn affects the adjustment and optimization of the water supply and drainage system. Summary of the invention

[0004] In order to solve the technical problem of incomplete display inside the model, this application provides a data extraction and automatic modeling method and system for water supply and drainage drawings. The technical solutions adopted are as follows:

[0005] In the first aspect, the present application proposes a method for data extraction and automatic modeling of water supply and drainage drawings, the method comprising the following steps:

[0006] Obtain the connectivity and internal information of the pipeline according to the water supply and drainage drawings, divide the pipeline into main pipeline and secondary pipeline according to whether the pipeline is equipped with sensors, and obtain the water flow of the main pipeline; the internal information of the pipeline includes radius, height, slope and water flow direction;

[0007] Any secondary pipe is recorded as the secondary pipe to be analyzed, and the main pipe is selected as the upstream pipe and the downstream pipe in the upstream and downstream of the secondary pipe to be analyzed; and several diversion pipes corresponding to the upstream and downstream pipes are obtained according to the water flow direction; the height ratio of the diversion pipe to the upstream pipe is forwardly integrated with the radius of the diversion pipe to obtain the upstream water diversion degree of the diversion pipe; the height ratio of the downstream pipe to the diversion pipe is forwardly integrated with the radius of the diversion pipe to obtain the downstream water diversion degree of the diversion pipe; the upstream water diversion degree and the downstream water diversion degree of the secondary pipe to be analyzed are normalized to obtain the upstream water flow ratio and the downstream water flow ratio of the secondary pipe to be analyzed; according to the upstream water flow ratio and the downstream water flow ratio of the secondary pipe to be analyzed and the water flow of the upstream pipe and the downstream pipe, the water flow estimate of the secondary pipe to be analyzed is obtained;

[0008] The estimated water flow of the main pipeline and the water flow of the secondary pipeline are collectively referred to as the water flow of the pipeline; the connected pipelines of the pipeline are determined according to the connectivity of the pipeline; the water flow acceptance of the pipeline is obtained according to the mean and standard deviation of the water flow of all the connected pipelines corresponding to the pipeline; the water flow trend consistency of all the connected pipelines corresponding to the pipeline is obtained according to the differences between the radius, height and slope of all the connected pipelines corresponding to the pipeline; the water flow pressure performance of the pipeline is obtained according to the water flow acceptance of the pipeline and the water flow trend consistency of all the corresponding connected pipelines;

[0009] The model is constructed through water supply and drainage drawings, and the water flow pressure performance is presented in the model to complete the final modeling.

[0010] In the above scheme, this application calculates the estimated water flow data of each pipeline, and then uses the estimated water flow data of the pipeline to analyze the water flow pressure performance caused by the water circulation between the pipelines, so as to intuitively display the water flow pressure load performance of each pipeline in the model constructed by the water supply and drainage drawings. In this way, the water supply and drainage model not only displays the 3D form of the system, but also can simulate the water flow dynamics and system behavior, which helps to better optimize and adjust the design of the water supply and drainage drawings.

[0011] In one embodiment, the method of selecting a main pipeline as the upstream pipeline and the downstream pipeline in the upstream and downstream of the secondary pipeline to be analyzed, and obtaining a plurality of branch pipelines corresponding to the upstream and downstream pipelines according to the flow direction of water is:

[0012] For the secondary pipeline to be analyzed, the upstream and downstream main pipelines closest to the secondary pipeline to be analyzed are recorded as the upstream pipeline and the downstream pipeline respectively;

[0013] All pipes connected to each upstream pipe in the direction of water flow are recorded as its branch pipes;

[0014] All pipes connected to each downstream pipe with water flow in the opposite direction are recorded as diversion pipes.

[0015] In one embodiment, the method of forwardly integrating the height ratio of the diversion pipe to the upstream pipe with the radius of the diversion pipe to obtain the upstream water diversion degree of the diversion pipe is:

[0016] The product of the ratio of the height of the upstream pipe to the height of the diversion pipe and the radius of the diversion pipe is taken as the upstream water diversion degree of the diversion pipe.

[0017] In one embodiment, the method of forwardly fusing the height ratio of the downstream pipeline and the diversion pipeline with the radius of the diversion pipeline to obtain the downstream water flow diversion degree of the diversion pipeline is:

[0018] The product of the ratio of the height of the diversion pipe to the height of the downstream pipe and the radius of the diversion pipe is taken as the downstream water diversion degree of the diversion pipe.

[0019] In one embodiment, the method for obtaining the estimated water flow value of the secondary pipeline to be analyzed according to the upstream water flow ratio and the downstream water flow ratio of the secondary pipeline to be analyzed and the water flow of the upstream pipeline and the downstream pipeline is:

[0020] , represents the proportion of upstream water flow in the secondary pipeline to be analyzed, represents the water flow in the upstream pipe, represents the proportion of downstream water flow in the secondary pipeline to be analyzed, represents the water flow in the downstream pipe, represents the linear normalization function, Represents the estimated water flow rate of the secondary pipe to be analyzed.

[0021] In one embodiment, the method for determining the connected pipes of a pipe according to the connectivity of the pipes is:

[0022] Any pipe is recorded as the current pipe, and the pipes directly connected to the current pipe and connected to the direction of the water flow in the current pipe are recorded as connected pipes.

[0023] In one embodiment, the method for obtaining the water flow acceptance degree of a pipeline according to the mean and standard deviation of the water flow of all connected pipelines corresponding to the pipeline is:

[0024] The mean and standard deviation of the water flow of all connected pipelines corresponding to the current pipeline are calculated, and the ratio of the mean and the standard deviation is used as the water flow acceptance of the current pipeline.

[0025] In one embodiment, the method for obtaining the consistency of water flow trends of all connected pipes corresponding to the pipe according to the differences among the radius, height, and slope of all connected pipes corresponding to the pipe is:

[0026] Record the height, radius, and slope of the pipe as specification features;

[0027] , represents the parameter value of the gth specification feature of the i-th connected pipeline, represents the maximum value of the parameter value of the g-th specification feature in all connected pipelines, represents the number of specification features, Indicates the number of connected pipelines corresponding to the current pipeline, Indicates the consistency of water flow trends of all connected pipes corresponding to the current pipe.

[0028] In one embodiment, the method for obtaining the water flow pressure performance of the pipeline according to the water flow receiving degree of the pipeline and the consistency of the water flow trend of all the connected pipelines is:

[0029] The product of the water flow acceptance of the pipeline and the consistency of the water flow trends of all the connected pipelines corresponding to the pipeline is recorded as the water flow pressure performance of the pipeline.

[0030] In the second aspect, an embodiment of the present application also provides a data extraction and automatic modeling system for water supply and drainage drawings, comprising a memory, a processor, and a computer program stored in the memory and running on the processor, wherein when the processor executes the computer program, the steps of any one of the above-mentioned methods for data extraction and automatic modeling of water supply and drainage drawings are implemented.

[0031] The beneficial effects of this application are:

[0032] This application calculates the estimated water flow data of each pipeline, and then uses the estimated water flow data of the pipeline to analyze the water flow pressure performance caused by the water circulation between the pipelines, so as to intuitively display the water flow pressure load performance of each pipeline in the model constructed by the water supply and drainage drawings. In this way, the water supply and drainage model not only displays the 3D form of the system, but also simulates the water flow dynamics and system behavior, which helps to better optimize and adjust the design of the water supply and drainage drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions and advantages in the embodiments of the present application or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0034] Figure 1 A flow chart of a method for data extraction and automatic modeling of water supply and drainage drawings provided in one embodiment of the present application. DETAILED DESCRIPTION

[0035] In order to further explain the technical means and effects adopted by the present application to achieve the predetermined invention purpose, the following is a detailed description of the data extraction and automatic modeling method and system of a water supply and drainage drawing proposed in the present application, its specific implementation method, structure, features and effects, in combination with the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "another embodiment" does not necessarily refer to the same embodiment. In addition, specific features, structures or characteristics in one or more embodiments may be combined in any suitable form.

[0036] Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0037] An embodiment of a method for data extraction and automatic modeling of water supply and drainage drawings:

[0038] The specific scheme of the data extraction and automatic modeling method of water supply and drainage drawings provided by the present application is described in detail below with reference to the accompanying drawings.

[0039] See also Figure 1 , which shows a flow chart of a method for data extraction and automatic modeling of a water supply and drainage drawing provided by an embodiment of the present application, the method comprising the following steps:

[0040] Step S001, obtaining the connectivity status, internal information and water flow of the main pipeline.

[0041] Based on the water supply and drainage drawings, the distribution of each pipe and the internal information of each pipe can be obtained.

[0042] In a water supply and drainage system, water volume sensors will be arranged in some of the pipes. The water flow in the pipes can be detected by the water volume sensors. The water volume sensors will only be arranged in the main pipes. The pipes where the water volume sensors are arranged are recorded as the main pipes, and the pipes where the water volume sensors are not arranged are recorded as the secondary pipes.

[0043] The distribution of each pipeline refers to the connectivity between different pipelines, that is, the pipeline distribution can be used to obtain which pipelines each pipeline is connected to; the internal information of each pipeline includes radius, height, slope, and water flow direction. The water flow of the main pipeline is obtained through the water flow sensor.

[0044] At this point, the connectivity of the pipeline, internal information, and water flow in the main pipeline have been obtained.

[0045] Step S002, based on the secondary pipeline, the upstream and downstream pipelines are screened, and the upstream and downstream water flow diversion degrees are obtained based on the height ratios of all diversion pipelines of the upstream and downstream pipelines to the upstream and downstream pipelines and the radius of the diversion pipelines, and the water flow estimation value of the secondary pipeline is obtained in combination with the water flow of the upstream and downstream pipelines.

[0046] The water supply and drainage drawings can clearly reflect the distribution and connectivity of pipelines, and involve the differences in size specifications between pipelines, so that there are different pressure manifestations between water flow in the pipelines. In particular, for a certain pipeline, it may be connected to multiple pipelines. When a large amount of water from multiple pipelines connected to it flows into the pipeline at the same time, this will bring a significant load on the water pressure of the pipeline.

[0047] Since the water flow sensor is only installed in the main pipe, it is impossible to obtain the water flow in the secondary pipe. The main pipe is an important water flow point and the water volume is relatively concentrated here. Therefore, the water flow in each pipe can be estimated based on the connectivity between the pipes.

[0048] For each secondary pipeline, the upstream and downstream main pipelines closest to it are obtained through the inflow and outflow directions of the water flow in the secondary pipeline, and the secondary pipeline is analyzed through the water flow of the main pipeline.

[0049] For the secondary pipeline to be analyzed, the upstream and downstream main pipelines closest to it are recorded as the upstream pipeline and the downstream pipeline respectively. Since the main pipeline will connect multiple secondary pipelines, each upstream and downstream pipeline will correspond to several secondary pipelines. All pipelines connected to the direction of the water flow of each upstream pipeline are recorded as diversion pipelines, and all pipelines connected to the opposite direction of the water flow of each downstream pipeline are recorded as diversion pipelines, where the diversion pipelines include the secondary pipeline to be analyzed.

[0050] For upstream and downstream pipes, they connect multiple pipes for diversion, so the laying height and pipe size specifications of these pipes will affect the degree of water flow they receive. For diversion pipes, the lower their laying height is relative to the corresponding upstream pipe, the more water tends to flow into them under the action of gravity; the higher the downstream pipe is, the more water tends to flow out of it under the action of gravity. At the same time, in this process, the larger the radius of the pipe size, the more water will flow in and out.

[0051] For the upstream pipeline, the upstream water diversion degree of each diversion pipeline is obtained according to the height ratio of each diversion pipeline to the upstream pipeline and the radius of the diversion pipeline.

[0052] The expression of the upstream water diversion degree of each diversion pipe is:

[0053] , represents the radius of the mth branch pipe, represents the height of the mth branch pipe, represents the height of the upstream pipe, It represents the upstream water diversion degree of the mth diversion pipe.

[0054] Among them, the larger the radius of the diversion pipe, the greater the water flow into the diversion pipe; the greater the height difference between the diversion pipe and the upstream pipe, the more water flow from the upstream pipe flows into the diversion pipe through the action of gravitational potential energy; therefore, the greater the upstream water diversion degree.

[0055] The upstream water flow diversion degrees of all diversion pipes corresponding to the upstream pipe are obtained, and the ratio of the upstream water flow diversion degree of the secondary pipe to be analyzed to the sum of the upstream water flow diversion degrees of all diversion pipes is taken as the upstream water flow ratio of the secondary pipe to be analyzed.

[0056] For the downstream pipeline, the downstream water diversion degree of each diversion pipeline is obtained according to the height ratio of each diversion pipeline to the downstream pipeline and the radius of the diversion pipeline.

[0057] The expression of the downstream water diversion degree of each diversion pipe is:

[0058] , represents the radius of the nth branch pipe, represents the height of the nth branch pipe, represents the height of the downstream pipe, Indicates the downstream water diversion degree of the nth diversion pipe.

[0059] Among them, the larger the radius of the diversion pipe, the greater the water flow into the diversion pipe; the greater the height difference between the diversion pipe and the downstream pipe, the more water flow from the diversion pipe flows into the downstream pipe through the action of gravitational potential energy; therefore, the greater the downstream water diversion degree.

[0060] The downstream water flow diversion degrees of all diversion pipes corresponding to the downstream pipes are obtained, and the ratio of the downstream water flow diversion degree of the secondary pipe to be analyzed to the sum of the downstream water flow diversion degrees of all diversion pipes is taken as the downstream water flow ratio of the secondary pipe to be analyzed.

[0061] For each pipeline, if there is only one pipeline connected upstream and downstream, the water flow rate flowing into the pipeline and the water flow rate flowing out of the pipeline are consistent. However, in the above analysis process, the influence of pipeline specifications on the water flow direction when the pipeline is connected to multiple pipelines is taken into account. Therefore, the more consistent the inflow and outflow of water are, the more accurate the inferential analysis of the above process is.

[0062] For each secondary pipeline to be analyzed, the average of its inflow and outflow water flows is taken as the water flow reference value of the secondary pipeline to be analyzed. The water flow reference value is expanded based on the consistency between the inflow and outflow water flows to obtain the estimated water flow value of the secondary pipeline to be analyzed. The expression is:

[0063] , represents the proportion of upstream water flow in the secondary pipeline to be analyzed, represents the water flow in the upstream pipe, represents the proportion of downstream water flow in the secondary pipeline to be analyzed, represents the water flow in the downstream pipe, represents the linear normalization function, Represents the estimated water flow rate of the secondary pipe to be analyzed.

[0064] At this point, the estimated water flow rate of the secondary pipeline to be analyzed is obtained.

[0065] Step S003, determine the connected pipes of the pipe according to the connectivity of the pipe, obtain the water flow acceptance of the pipe according to the mean and standard deviation of the water flow of all connected pipes; obtain the water flow trend consistency of the pipe according to the difference between the specification characteristics of all connected pipes; obtain the water flow pressure performance of the pipe based on the water flow acceptance and the water flow trend consistency.

[0066] Get the estimated water flow of all secondary pipes in the water supply and drainage system, and refer to the estimated water flow of the secondary pipes and the water flow of the main pipe as the water flow of the pipe. Record any pipe as the current pipe, and record the pipes directly connected to the current pipe and connected in the direction of the water flow of the current pipe as connected pipes; therefore, analysis can be performed based on each pipe and each connected pipe into which the water flows. When each connected pipe reaches the current pipe at a high water flow rate at the same time, the current pipe faces excessive water flow load pressure.

[0067] The water flow acceptance degree of the current pipeline is calculated based on the water flow of all the connected pipelines of the current pipeline. The expression is:

[0068] , Represents the average water flow of all connected pipes corresponding to the current pipe, represents the water flow of the i-th connected pipe corresponding to the current pipe, Indicates the number of connected pipelines corresponding to the current pipeline, Indicates the standard deviation of the water flow of all connected pipes corresponding to the current pipe, Indicates the water flow receiving degree of the current pipeline.

[0069] The greater the water flow receiving degree of the current pipeline, the greater the water flow pressure received by the current pipeline from the connected pipeline.

[0070] The above definition only defines the overall water flow rate. Even if the water flow rate is higher, it does not mean that it will bring high-load water flow pressure to the current pipeline. It is also necessary to pay attention to whether the water in each connected pipeline reaches the current pipeline at the same time. This can be achieved by analyzing the internal information between the connected pipelines. The closer the internal information is, that is, when the radius, length, height and other specification characteristics between the connected pipelines are close, it means that the water flow is affected by the above pipeline characteristics, which will cause the water flow in the connected pipelines to maintain a relatively consistent flow trend, that is, each connected pipeline will be more likely to reach the location of the current pipeline at the same time.

[0071] For the current pipeline, the consistency of the water flow trend of all connected pipelines corresponding to the current pipeline is obtained based on the difference in specification characteristics between the connected pipelines. The expression is:

[0072] , represents the parameter value of the gth specification feature of the i-th connected pipeline, represents the maximum value of the parameter value of the g-th specification feature in all connected pipelines, represents the number of specification features, Indicates the number of connected pipelines corresponding to the current pipeline, Indicates the consistency of water flow trends of all connected pipes corresponding to the current pipe.

[0073] The greater the consistency of the water flow trend, the greater the pressure the current pipeline is subjected to from the water flow in the connected pipelines.

[0074] Therefore, the water flow pressure of the current pipeline is obtained according to the water flow receiving degree of the current pipeline and the consistency of the water flow trend of all connected pipelines corresponding to the current pipeline. The expression is:

[0075] , Indicates the water flow receiving degree of the current pipeline, Indicates the consistency of water flow trends in all connected pipes corresponding to the current pipe. Indicates the current water flow pressure in the pipeline.

[0076] After obtaining the water flow pressure of each pipeline, the water flow pressure of all pipelines is normalized, and the normalized water flow pressure is recorded as the water flow pressure performance of the pipeline.

[0077] At this point, the water flow pressure performance of each pipeline has been obtained.

[0078] Step S004, constructing a water supply and drainage model, presenting the water flow pressure performance in the model, and completing the final modeling.

[0079] Based on the existing water supply and drainage model construction, the features in the water supply and drainage drawings are identified through its learning algorithm, and intelligent extraction is performed and the existing BIM software is used to build a 3D model based on the water supply and drainage drawings. At the same time, the water flow pressure performance of each pipe calculated above is presented in the model, so that the three-dimensional model of the water supply and drainage system can be intuitively displayed, and the pressure status of the pipe under the current design can be observed in real time, which helps the staff to find the shortcomings of the current water supply and drainage system design, so as to help them better improve and upgrade the design of the water supply and drainage drawings in the current area.

[0080] Based on the same inventive concept as the above method, an embodiment of the present invention also provides a data extraction and automatic modeling system for water supply and drainage drawings, including a memory, a processor, and a computer program stored in the memory and running on the processor, and when the processor executes the computer program, it implements the steps of any one of the above-mentioned methods for data extraction and automatic modeling of water supply and drainage drawings.

[0081] It should be noted that the above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

[0082] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

Claims

1. A method for data extraction and automatic modeling of water supply and drainage drawings, characterized in that: The method comprises the following steps: Obtain the connectivity and internal information of the pipeline according to the water supply and drainage drawings, divide the pipeline into main pipeline and secondary pipeline according to whether the pipeline is equipped with sensors, and obtain the water flow of the main pipeline; the internal information of the pipeline includes radius, height, slope and water flow direction; Any secondary pipe is recorded as the secondary pipe to be analyzed, and the main pipe is selected as the upstream pipe and the downstream pipe in the upstream and downstream of the secondary pipe to be analyzed; and several diversion pipes corresponding to the upstream and downstream pipes are obtained according to the water flow direction; the height ratio of the diversion pipe to the upstream pipe is forwardly integrated with the radius of the diversion pipe to obtain the upstream water diversion degree of the diversion pipe; the height ratio of the downstream pipe to the diversion pipe is forwardly integrated with the radius of the diversion pipe to obtain the downstream water diversion degree of the diversion pipe; the upstream water diversion degree and the downstream water diversion degree of the secondary pipe to be analyzed are normalized to obtain the upstream water flow ratio and the downstream water flow ratio of the secondary pipe to be analyzed; according to the upstream water flow ratio and the downstream water flow ratio of the secondary pipe to be analyzed and the water flow of the upstream pipe and the downstream pipe, the water flow estimate of the secondary pipe to be analyzed is obtained; The estimated water flow of the main pipeline and the water flow of the secondary pipeline are collectively referred to as the water flow of the pipeline; the connected pipelines of the pipeline are determined according to the connectivity of the pipeline; the water flow acceptance of the pipeline is obtained according to the mean and standard deviation of the water flow of all the connected pipelines corresponding to the pipeline; the water flow trend consistency of all the connected pipelines corresponding to the pipeline is obtained according to the differences between the radius, height and slope of all the connected pipelines corresponding to the pipeline; the product of the water flow acceptance of the pipeline and the water flow trend consistency of all the corresponding connected pipelines is used as the water flow pressure performance of the pipeline; The model is constructed through water supply and drainage drawings, and the water flow pressure performance is presented in the model to complete the final modeling.

2. The data extraction and automatic modeling method of water supply and drainage drawings according to claim 1 is characterized in that: The method of selecting the main pipeline as the upstream pipeline and the downstream pipeline in the upstream and downstream of the secondary pipeline to be analyzed, and obtaining a plurality of branch pipelines corresponding to the upstream and downstream pipelines according to the flow direction of the water is as follows: For the secondary pipeline to be analyzed, the upstream and downstream main pipelines closest to the secondary pipeline to be analyzed are recorded as the upstream pipeline and the downstream pipeline respectively; All pipes connected to each upstream pipe in the direction of water flow are recorded as its branch pipes; All pipes connected to each downstream pipe with water flow in the opposite direction are recorded as diversion pipes.

3. The data extraction and automatic modeling method of a water supply and drainage drawing according to claim 1, characterized in that: The method of forwardly integrating the height ratio of the diversion pipeline to the upstream pipeline with the radius of the diversion pipeline to obtain the upstream water diversion degree of the diversion pipeline is: The product of the ratio of the height of the upstream pipe to the height of the diversion pipe and the radius of the diversion pipe is taken as the upstream water diversion degree of the diversion pipe.

4. The data extraction and automatic modeling method of water supply and drainage drawings according to claim 1 is characterized in that: The method of forwardly integrating the height ratio of the downstream pipeline and the diversion pipeline with the radius of the diversion pipeline to obtain the diversion degree of the downstream water flow of the diversion pipeline is: The product of the ratio of the height of the diversion pipe to the height of the downstream pipe and the radius of the diversion pipe is taken as the downstream water diversion degree of the diversion pipe.

5. The data extraction and automatic modeling method of water supply and drainage drawings according to claim 1 is characterized in that: The method for obtaining the estimated value of the water flow of the secondary pipeline to be analyzed according to the upstream water flow ratio and the downstream water flow ratio of the secondary pipeline to be analyzed and the water flow of the upstream pipeline and the downstream pipeline is: , represents the proportion of upstream water flow in the secondary pipeline to be analyzed, represents the water flow in the upstream pipe, represents the proportion of downstream water flow in the secondary pipeline to be analyzed, represents the water flow in the downstream pipe, represents the linear normalization function, Represents the estimated water flow rate of the secondary pipe to be analyzed.

6. The data extraction and automatic modeling method of water supply and drainage drawings according to claim 1 is characterized in that: The method for determining the connected pipelines of a pipeline according to the connectivity of the pipeline is: Any pipe is recorded as the current pipe, and the pipes directly connected to the current pipe and connected to the direction of the water flow in the current pipe are recorded as connected pipes.

7. The data extraction and automatic modeling method of water supply and drainage drawings according to claim 6 is characterized in that: The method for obtaining the water flow acceptance of a pipeline according to the mean and standard deviation of the water flow of all connected pipelines corresponding to the pipeline is: The mean and standard deviation of the water flow of all connected pipelines corresponding to the current pipeline are calculated, and the ratio of the mean and the standard deviation is used as the water flow acceptance of the current pipeline.

8. The data extraction and automatic modeling method of water supply and drainage drawings according to claim 6 is characterized in that: The method for obtaining the consistency of water flow trends of all connected pipes corresponding to a pipe according to the differences among the radius, height and slope of all connected pipes corresponding to the pipe is: Record the height, radius, and slope of the pipe as specification features; , represents the parameter value of the gth specification feature of the i-th connected pipeline, represents the maximum value of the parameter value of the g-th specification feature in all connected pipelines, represents the number of specification features, Indicates the number of connected pipelines corresponding to the current pipeline, Indicates the consistency of water flow trends of all connected pipes corresponding to the current pipe.

9. A data extraction and automatic modeling system for water supply and drainage drawings, comprising a memory, a processor, and a computer program stored in the memory and running on the processor, characterized in that: When the processor executes the computer program, the steps of the method for data extraction and automatic modeling of a water supply and drainage drawing as described in any one of claims 1-8 are implemented.

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