Drainage port quality-based and flow-dividing management method and system based on digital twinning

Abstract

The invention relates to a digital twinning-based drainage port quality-based and flow-dividing management method and system, and the method comprises the steps: carrying out simulation according to different flow-dividing working conditions of a flow-dividing pool, and constructing a physical model of the flow-dividing pool; collecting an actual working condition data set of the shunting pool; constructing a digital twinborn model, simulating the real-time operation state of the shunting pool by using the digital twinborn model, and calculating the instantaneous flow rate in the shunting pool in combination with the collected actual working condition data set of the shunting pool and the constructed physical model of the shunting pool; according to the calculated instantaneous flow in the flow dividing pool and the collected actual working condition data set of the flow dividing pool, water outlet quality-based flow dividing judgment is conducted, and a water outlet quality-based flow dividing decision result is obtained; and draining according to the decision result of quality-based flow division of the drainage port. According to the method, instantaneity and accuracy of instantaneous flow calculation can be achieved, and the method is slightly influenced by the environment; by combining the instantaneous flow obtained through calculation and the collected data, quality-based flow division judgment is conducted on the water outlet, and sewage and rainwater can be distinguished as much as possible.

Description

Technical Field

[0001] The present invention relates to the technical field of rainwater and sewage diversion and drainage management, and in particular to a drainage outlet quality-based diversion management method and system based on digital twins. Background Art

[0002] Quality-based diversion management is a new urban drainage management technology that collects or discharges domestic sewage, industrial wastewater, primary rainwater and clean rainwater according to their water quality characteristics in a pipe system, in order to realize rainwater resource utilization, avoid pollution of receiving water bodies and improve the operating efficiency of sewage treatment plants.

[0003] In order to solve the problem of separate quality and diversion management of rainwater and sewage, a Chinese utility model patent with patent number ZL202122307312.5 (authorization announcement number CN216405630U) discloses an intelligent separate quality and diversion outlet device, including: a diversion pool, which is provided with an inlet pipe, a rainwater discharge pipe, a rainwater discharge valve, a rainwater discard pipe, a rainwater discard valve, a water quality sensor and / or a liquid level sensor; and an intelligent box, which includes a sunny and rainy day sensor and a controller, and the controller is electrically connected to the sunny and rainy day sensor, the rainwater discharge valve, the rainwater discard valve, the water quality sensor and / or the liquid level sensor.

[0004] Although the above equipment is simple and efficient in the process of discarding initial rainwater, the initial rainwater after discarding is discharged into the municipal sewage network, and the relatively clean rainwater is directly discharged, which can effectively reduce the processing pressure of the municipal rainwater network to collect rainwater and ensure that rainwater is safely and reliably reused. However, the above equipment has the following limitations: Since the above equipment realizes quality and diversion through the water level and water quality judgment of the diversion pool, specifically: when the controller judges that the water level is greater than the water level threshold, it controls the rainwater discharge valve to open and the rainwater discard valve to close; when the controller judges that the water level is less than or equal to the water level threshold, and the water quality is greater than the water quality threshold, it controls the rainwater discard valve to open and the rainwater discharge valve to close. Since the parameters detected by the water quality sensor and the liquid level sensor are single, it is impossible to accurately distinguish between sewage and rainwater, so the quality and diversion accuracy of the equipment is limited. For this reason, it is necessary to further improve the existing technology. Summary of the invention

[0005] The first technical problem to be solved by the present invention is to provide a drainage outlet quality separation and diversion management method based on digital twins, which can distinguish sewage and rainwater as much as possible to improve the accuracy of quality separation and diversion, in response to the above-mentioned existing technology.

[0006] The second technical problem to be solved by the present invention is to provide a system that applies the above-mentioned drainage outlet quality and flow diversion management method based on digital twin.

[0007] The technical solution adopted by the present invention to solve the above-mentioned first technical problem is: a drainage outlet quality and flow management method based on digital twins, characterized in that it includes: Conduct simulation according to different diversion conditions of the diversion pool and build a physical model of the diversion pool; Collect the actual working condition data set of the diversion pool; Build a digital twin model, use the digital twin model to simulate the real-time operating status of the diversion pool, and calculate the instantaneous flow in the diversion pool by combining the actual working condition data set of the collected diversion pool and the physical model of the built diversion pool; Combine the calculated instantaneous flow in the diversion pool and the actual working condition data set collected from the diversion pool to make a judgment on the quality and diversion of the drainage outlet, and obtain the decision result of the quality and diversion of the drainage outlet; Drainage is carried out according to the decision results of the drainage outlet’s quality and flow separation.

[0008] Preferably, the physical model of the diversion pool includes a relationship model between the liquid level of the diversion pool and the pipe cross-sectional area of ​​the diversion pool, a flow rate calculation model and a dynamic water flow behavior model.

[0009] Furthermore, in the present invention, the actual operating data of the diversion pool includes conductivity, flow rate, liquid level of the diversion pool and whether there is precipitation.

[0010] Furthermore, in the present invention, the specific process of judging the quality and flow of the drainage outlet is as follows: Substitute the calculated instantaneous flow in the diversion pool and the actual working condition data set collected from the diversion pool into the following calculation formula to obtain the rain probability ; Among them, the probability of rain The calculation formula is: ; in, , and are weights, ∈(0,1), ∈(0,1), ∈(0,1), and + + =1; R is 0 or 1. When there is no precipitation, R is 0; when there is precipitation, R is 1; and are conductivity weights, is the real-time conductivity, is the reference value of the electrical conductivity of rainwater, is the reference value of sewage conductivity, is the instantaneous flow rate in the diversion pool, is the basic water volume threshold; The sewage probability is calculated according to the following formula ; Among them, the probability of sewage The calculation formula is: ; Determine the probability of rain Is it greater than a preset value? If so, it is determined that the decision result of the current drainage outlet separation and diversion is mainly rainwater; if not, it is determined that the decision result of the current drainage outlet separation and diversion is mainly sewage.

[0011] The technical solution adopted by the present invention to solve the above second technical problem is: a drainage outlet quality-dividing and flow-dividing management system based on digital twins, which is used to implement the drainage outlet quality-dividing and flow-dividing management method based on digital twins as mentioned above, characterized in that the drainage outlet quality-dividing and flow-dividing management system based on digital twins includes: A model building module, used to build a physical model of the diversion pool; A data acquisition module, used to collect actual working condition data of the diversion pool; A simulation operation module is connected to the model construction module and the data acquisition module, the simulation operation module receives the physical model of the diversion pool constructed by the model construction module and the actual working condition data set of the diversion pool collected by the data acquisition module, and constructs a digital twin model, uses the digital twin model to simulate the real-time operating status of the diversion pool, and calculates the instantaneous flow in the diversion pool in combination with the actual working condition data set of the diversion pool collected and the physical model of the diversion pool that has been constructed; A decision module is connected to the simulation operation module and the data acquisition module. The decision module receives the instantaneous flow in the diversion pool calculated by the simulation operation module and the actual working condition data set of the diversion pool collected by the data acquisition module, and makes a judgment on the quality and diversion of the drainage outlet in combination with the instantaneous flow in the diversion pool calculated and the actual working condition data set of the diversion pool collected, so as to obtain a decision result on the quality and diversion of the drainage outlet; The control execution module is connected to the decision module. The control execution module receives the decision result of the decision module and uses the decision result of the decision module as a control input to control drainage.

[0012] Preferably, the data acquisition module includes a conductivity sensor for collecting conductivity, a flow rate sensor for collecting flow rate, a level sensor for collecting the liquid level of the diversion pool, and a rain and snow sensor for collecting whether there is precipitation.

[0013] Compared with the prior art, the advantages of the present invention are: on the one hand, the drainage outlet quality separation and diversion management method of the invention patent application constructs a physical model of the diversion pool and collects a set of actual working condition data of the diversion pool, and then constructs a digital twin model to simulate the real-time operation status of the diversion pool, and combines the collected actual working condition data set of the diversion pool and the physical model of the diversion pool to calculate the instantaneous flow in the diversion pool, realizing the combination of the physical model of the diversion pool with the simulation, achieving the dynamic calculation of the flow in the diversion pool based on the multi-index data of the diversion pool, and realizing the real-time and accuracy of the dynamic instantaneous flow calculation, and being less affected by the environment; on the other hand, the drainage outlet quality separation and diversion judgment is performed by combining the instantaneous flow in the diversion pool calculated and the actual working condition data set of the diversion pool collected, so as to judge the source of the mixed drainage and distinguish sewage and rainwater as much as possible. Therefore, the quality separation and diversion management method has high quality separation and diversion accuracy, good real-time performance, and is less affected by the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a flow chart of a drainage outlet quality and flow diversion management method based on digital twin in an embodiment of the present invention; Figure 2 It is a schematic diagram of a drainage outlet quality and flow diversion management system based on digital twin in an embodiment of the present invention. DETAILED DESCRIPTION

[0015] The present invention is further described in detail below with reference to the accompanying drawings.

[0016] like Figure 1 As shown, the drainage outlet quality and flow management method based on digital twin in this embodiment includes: Simulating different diversion conditions of the diversion pool to construct a physical model of the diversion pool; the physical model of the diversion pool includes a relationship model between the liquid level of the diversion pool and the pipe cross-sectional area of ​​the diversion pool, a flow rate calculation model and a dynamic water flow behavior model; Collecting a set of actual working condition data of the diversion pool; in this embodiment, the actual working condition data of the diversion pool includes conductivity, flow rate, liquid level of the diversion pool, and whether there is precipitation; Build a digital twin model, use the digital twin model to simulate the real-time operating status of the diversion pool, and calculate the instantaneous flow in the diversion pool by combining the actual working condition data set of the collected diversion pool and the physical model of the built diversion pool; Combine the calculated instantaneous flow in the diversion pool and the actual working condition data set collected from the diversion pool to make a judgment on the quality and diversion of the drainage outlet, and obtain the decision result of the quality and diversion of the drainage outlet; In this embodiment, the specific process of judging the quality and flow of the drainage outlet is as follows: Substitute the calculated instantaneous flow in the diversion pool and the actual working condition data set collected from the diversion pool into the following calculation formula to obtain the rain probability ; Among them, the probability of rain The calculation formula is: ; in, , and are weights, ∈(0,1), ∈(0,1), ∈(0,1), and + + =1; R is 0 or 1. When there is no precipitation, R is 0; when there is precipitation, R is 1; and are conductivity weights, is the real-time conductivity, is the reference value of the electrical conductivity of rainwater, is the reference value of sewage conductivity, is the instantaneous flow rate in the diversion pool, is the basic water volume threshold; In this embodiment Normal instantaneous flow when there is no rainfall, determined based on historical statistics , and The value can be adjusted according to the application scenario, for example, in areas with heavy rainfall, increase ; When the sewage conductivity fluctuates greatly, increase ; When the water volume changes significantly, increase ; The sewage probability is calculated according to the following formula ; Among them, the probability of sewage The calculation formula is: ; Determine the probability of rain Is it greater than a preset value? If so, it is determined that the decision result of the current drainage outlet separation and diversion is mainly rainwater; if not, it is determined that the decision result of the current drainage outlet separation and diversion is mainly sewage; Drainage is carried out according to the decision results of the drainage outlet’s quality and flow separation.

[0017] Due to the different working conditions of the diversion pool, the calculation formulas used to calculate the instantaneous flow in the diversion pool are also different. The calculation formulas used to calculate the instantaneous flow in the flow pool in this embodiment all adopt the existing technology. In order to facilitate the understanding of the method in the present invention, the following two specific cases are used in this embodiment for illustration: Case 1: Calculate the instantaneous flow rate Q based on the measured flow velocity and liquid level height and the geometric shape of the pipeline; Assumptions: Flow rate :1.5 m / s Liquid level : 0.5 m Pipe diameter : 1.0 m Pipe shape: round pipe Calculation of pipe cross-sectional area: When the liquid level Smaller than the pipe diameter , the cross-sectional area can be calculated by the following formula: Pipe radius ; Center Angle (radian): ; Partial circle area

[0018] Partially filled cross-sectional area

[0019] Instantaneous flow rate in the diversion pool

[0020] The instantaneous flow calculation formula in this case 1 is calculated by combining the relationship model between the liquid level of the diversion pool and the pipe cross-sectional area of ​​the diversion pool and the collected flow velocity to obtain the instantaneous flow; Case 2: Flow calculation based on Manning's formula Applicable types: rainwater, sewage drainage channels or natural water channels, with complete and accurate pipe section data; If it is other cross-section (such as circular or trapezoidal), the wet cross-sectional area and wet perimeter should be calculated separately and then entered into the formula; Detailed explanation of formula application and calculation process: Assumptions: A rectangular channel for rainwater drainage with the following parameters: Channel bottom width : 2m water depth : 1 m The channel bottom material is concrete, and the Manning coefficient : 0.015 Hydraulic slope : 0.002 Calculation process: Wet cross-sectional area calculate:

[0021] Wet perimeter calculate:

[0022] Hydraulic radius ; Calculate instantaneous flow rate according to Manning's formula

[0023] The instantaneous flow rate of the channel under current conditions is ; The instantaneous flow calculation formula in this case 2 combines the velocity calculation model (i.e. the Manning formula mentioned above) and the collected liquid level (i.e. the liquid level in the diversion tank) to calculate and obtain the instantaneous flow; like Figure 2 As shown, this embodiment also involves a drainage outlet quality-dividing and flow-dividing management system based on digital twins, which is used to implement the above-mentioned drainage outlet quality-dividing and flow-dividing management method based on digital twins. The drainage outlet quality-dividing and flow-dividing management system based on digital twins includes: A model building module, used to build a physical model of the diversion pool; A data acquisition module is used to collect actual working condition data of the diversion pool; A simulation operation module is connected to the model construction module and the data acquisition module, the simulation operation module receives the physical model of the diversion pool constructed by the model construction module and the actual working condition data set of the diversion pool collected by the data acquisition module, and constructs a digital twin model, uses the digital twin model to simulate the real-time operating status of the diversion pool, and calculates the instantaneous flow in the diversion pool in combination with the actual working condition data set of the diversion pool collected and the physical model of the diversion pool that has been constructed; A decision module is connected to the simulation operation module and the data acquisition module. The decision module receives the instantaneous flow in the diversion pool calculated by the simulation operation module and the actual working condition data set of the diversion pool collected by the data acquisition module, and makes a judgment on the quality and diversion of the drainage outlet in combination with the instantaneous flow in the diversion pool calculated and the actual working condition data set of the diversion pool collected, so as to obtain a decision result on the quality and diversion of the drainage outlet; The control execution module is connected to the decision module. The control execution module receives the decision result of the decision module and uses the decision result of the decision module as a control input to control drainage.

[0024] The data acquisition module in this embodiment includes a conductivity sensor for collecting conductivity, a flow rate sensor for collecting flow rate, a liquid level sensor for collecting the liquid level of the diversion pool, and a rain and snow sensor for collecting whether there is precipitation.

[0025] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A drainage outlet quality and flow management method based on digital twins, characterized in that: include: Conduct simulation according to different diversion conditions of the diversion pool and build a physical model of the diversion pool; Collect the actual working condition data set of the diversion pool; Build a digital twin model, use the digital twin model to simulate the real-time operating status of the diversion pool, and calculate the instantaneous flow in the diversion pool by combining the actual working condition data set of the collected diversion pool and the physical model of the built diversion pool; Combine the calculated instantaneous flow in the diversion pool and the actual working condition data set collected from the diversion pool to make a judgment on the quality and diversion of the drainage outlet, and obtain the decision result of the quality and diversion of the drainage outlet; Drainage is carried out according to the decision results of the drainage outlet’s quality and flow separation.

2. The drainage outlet quality and flow management method according to claim 1 is characterized by: The physical model of the diversion pool includes a relationship model between the liquid level of the diversion pool and the pipe cross-sectional area of ​​the diversion pool, a flow rate calculation model and a dynamic water flow behavior model.

3. The drainage outlet quality and flow management method according to claim 2 is characterized by: The actual working condition data of the diversion pool include conductivity, flow rate, liquid level of the diversion pool and whether there is precipitation.

4. The drainage outlet quality and flow management method according to claim 3 is characterized by: The specific process of judging the quality and flow of the drainage outlet is as follows: Substitute the calculated instantaneous flow in the diversion pool and the actual working condition data set collected from the diversion pool into the following calculation formula to obtain the rain probability ; Among them, the probability of rain The calculation formula is: ； in, , and are weights, ∈(0,1), ∈(0,1), ∈(0,1), and + + =1; R is 0 or 1. When there is no precipitation, R is 0; when there is precipitation, R is 1; and are conductivity weights, is the real-time conductivity, is the reference value of the electrical conductivity of rainwater, is the reference value of sewage conductivity, is the instantaneous flow rate in the diversion pool, is the basic water volume threshold; The sewage probability is calculated according to the following formula ; Among them, the probability of sewage The calculation formula is: ； Determine the probability of rain Is it greater than a preset value? If so, it is determined that the decision result of the current drainage outlet separation and diversion is mainly rainwater; if not, it is determined that the decision result of the current drainage outlet separation and diversion is mainly sewage.

5. A drainage outlet quality and flow diversion management system based on digital twins, used to implement the drainage outlet quality and flow diversion management method based on digital twins as described in any one of claims 1 to 4 above, characterized in that: The digital twin-based drainage outlet quality and flow management system includes: A model building module, used to build a physical model of the diversion pool; A data acquisition module, used to collect actual working condition data of the diversion pool; A simulation operation module is connected to the model construction module and the data acquisition module, the simulation operation module receives the physical model of the diversion pool constructed by the model construction module and the actual working condition data set of the diversion pool collected by the data acquisition module, and constructs a digital twin model, uses the digital twin model to simulate the real-time operating status of the diversion pool, and calculates the instantaneous flow in the diversion pool in combination with the actual working condition data set of the diversion pool collected and the physical model of the diversion pool that has been constructed; A decision module is connected to the simulation operation module and the data acquisition module. The decision module receives the instantaneous flow in the diversion pool calculated by the simulation operation module and the actual working condition data set of the diversion pool collected by the data acquisition module, and makes a judgment on the quality and diversion of the drainage outlet in combination with the instantaneous flow in the diversion pool calculated and the actual working condition data set of the diversion pool collected, so as to obtain a decision result on the quality and diversion of the drainage outlet; The control execution module is connected to the decision module. The control execution module receives the decision result of the decision module and uses the decision result of the decision module as a control input to control drainage.

6. The drainage outlet quality and flow separation management system according to claim 5, characterized in that: The data acquisition module includes a conductivity sensor for collecting conductivity, a flow rate sensor for collecting flow rate, a liquid level sensor for collecting the liquid level of the diversion pool, and a rain and snow sensor for collecting whether there is precipitation.

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