A risk monitoring system for urban pipe networks

Abstract

The present invention relates to the technical field of pipe network monitoring, and in particular to a risk monitoring system for an urban pipe network, comprising a delivery collection unit, a discharge collection unit, a data collection unit, a model building unit, a risk assessment unit and an instruction transmission unit, for obtaining the delivery flow of water flow at each position in the pipe network, obtaining the discharge flow at each discharge outlet of the pipe network, determining a risk assessment value for a single area through a risk assessment model according to the acquired parameters, and determining whether the pipe network has a risk according to the risk assessment value. When it is determined that the pipe network has a risk, a corresponding instruction is generated based on the determined cause, and the risk assessment model is optimized and the opening of each valve in the pipeline is determined according to the instruction, thereby improving the monitoring efficiency of the pipe network.

Description

Technical Field

[0001] The present invention relates to the technical field of pipe network monitoring, and in particular to a risk monitoring system for urban pipe networks. Background Art

[0002] The urban pipeline network is the "lifeline" of a city's operation. Because the pipeline network is laid underground and is hidden, when a failure or emergency occurs, it is difficult to handle and takes a long time to handle.

[0003] Therefore, it is very important to provide accurate and real-time early warning of risks in urban pipeline networks in order to avoid emergencies or save processing time.

[0004] Chinese Patent Publication No.: CN116402346A, discloses a risk warning method, system, equipment and storage medium based on urban pipe network, including: based on the basic information of drainage pipe network, data parameter collection, establishment of BIM model; through the Internet of Things sensor detection data, the state data of drainage pipe network is collected, and it is associated with the BIM model in real time, wherein the state data includes: operating environment data, meteorological environment data; according to the time period of historical alarm events, the state data of drainage pipe network when the historical alarm events occur is extracted, and the state data of drainage pipe network is extracted as alarm conditions according to the historical alarm events, and associated with the BIM model; according to the alarm conditions in the BIM model, combined with the current state data of drainage pipe network, it is judged whether to issue an alarm; it can be seen that the above technical scheme has the following problems: it does not take into account the investigation of abnormal pipeline nodes, which affects the monitoring efficiency of the pipe network. Summary of the invention

[0005] To this end, the present invention provides a city pipe network risk monitoring system to overcome the problem in the prior art that abnormal pipe nodes are not checked, which affects the monitoring efficiency of the pipe network.

[0006] To achieve the above object, the present invention provides a city pipe network risk monitoring system, comprising:

[0007] The transport and collection unit includes a plurality of node flow collectors arranged at corresponding positions of the pipe network to respectively detect the transport flow of water flow at corresponding pipes;

[0008] The discharge collection unit includes a plurality of discharge flow detectors arranged at corresponding discharge outlets of the pipe network to respectively detect the discharge flow of water flow at each discharge outlet;

[0009] A data collection unit, which is connected to the transport collection unit and the emission collection unit, respectively, for respectively acquiring a number of the transport flows collected by the transport collection unit and a number of the emission flows collected by the emission flow detector;

[0010] A model building unit, which is connected to the data collection unit, and is used to receive the delivery flow and the discharge flow acquired by the data collection unit, and substitute the delivery flow and the discharge flow into its pre-stored risk assessment model to generate a risk assessment value for the pipe network;

[0011] a risk assessment unit connected to the model building unit, for determining whether the pipeline network has a risk based on the risk assessment value output by the model building unit, and, if it is determined that the pipeline network has a risk, generating corresponding instructions based on the determined reasons, the instructions including an assessment value benchmark adjustment instruction, a pipeline location troubleshooting instruction, a model optimization instruction, and a node adjustment instruction;

[0012] An instruction transmission unit is respectively connected to the pipeline network, the model building unit and the risk assessment unit, and is used to transmit the instructions output by the risk assessment unit to the corresponding unit so that the corresponding unit performs corresponding operations, including determining an evaluation value benchmark, locating a faulty pipeline, optimizing the risk assessment model and determining the opening of each valve in the pipeline.

[0013] Furthermore, the risk assessment model pre-stored in the model building unit is as follows:

[0014]

[0015] Among them, R is the risk assessment value, W is the average rainfall in the area where the pipeline network is located within the preset period, S is the area of ​​the area where the pipeline network is located, G is the average drainage of the buildings connected to the pipeline network within the preset period, α is the first weight coefficient, 0<α<1, Qa is the average value of the discharge flow, which is the average value of the discharge flow, β is the second weight coefficient, 0<β<1 and α+β=1, qa is the average value of the delivery flow, which is the average value of each of the delivery flows.

[0016] Furthermore, the risk assessment unit is used to determine whether the pipeline network has risks within the preset period based on the risk evaluation value obtained by the model building unit, wherein:

[0017] If the risk evaluation value is less than or equal to a first preset evaluation value set in the risk evaluation unit, the risk evaluation unit determines that there is no risk in the pipeline network within the preset period, and determines whether there is a risk in the pipeline network within the next preset period based on the risk evaluation value obtained by the model building unit according to the data collected by the data collection unit within the next preset period;

[0018] If the risk assessment value is greater than the first preset assessment value and less than or equal to the second preset assessment value set in the risk assessment unit, the risk assessment unit determines whether there is a risk in the pipeline network within the preset period based on the historical average value of the transport flow rate obtained by the data collection unit;

[0019] If the risk evaluation value is greater than the second preset evaluation value, the risk assessment unit determines that the pipeline network has a risk within the preset period, and determines the type of risk existing in the pipeline network based on the obtained risk evaluation value.

[0020] Furthermore, the risk assessment unit is further used to determine whether the pipeline network has a risk within the preset period based on the average value of the discharge flow and a variance value of a preset number of historical average values ​​of discharge flow, wherein:

[0021] If the variance value is less than or equal to the preset variance value set in the risk assessment unit, the risk assessment unit determines that there is no risk in the pipe network within the preset period, and determines that the reason why the risk evaluation value is greater than the first preset evaluation value is that there are individual differences in precipitation and / or drainage in the area where the pipe network is located, and the risk assessment unit determines the first preset evaluation value and the second preset evaluation value according to the obtained variance value;

[0022] If the variance value is greater than the preset variance value, the risk assessment unit determines that there is a risk in the pipeline network within the preset period and the risk type is a pipeline failure in the pipeline network. The risk assessment unit issues a pipeline location and troubleshooting instruction, and determines the pipeline node where the failure occurs based on each of the transport flows, wherein the failure types include node blockage and node leakage.

[0023] Further, the risk assessment unit is further used to determine an adjustment method for the first preset evaluation value and the second preset evaluation value based on the variance difference value, wherein the variance difference value is a difference between the preset variance value and the variance value:

[0024] If the variance difference is less than or equal to a first preset variance difference set in the risk assessment unit, the risk assessment unit generates an evaluation value benchmark adjustment instruction to adjust the first preset evaluation value and the second preset evaluation value to corresponding values ​​using a first standard adjustment coefficient;

[0025] If the variance difference value is greater than the first preset variance difference value and less than or equal to a second preset variance difference value set in the risk assessment unit, the risk assessment unit generates an evaluation value benchmark adjustment instruction to adjust the first preset evaluation value and the second preset evaluation value to corresponding values ​​using a second standard adjustment coefficient;

[0026] If the variance difference is greater than the second preset variance difference, the risk assessment unit generates an evaluation value reference adjustment instruction to adjust the first preset evaluation value and the second preset evaluation value to corresponding values ​​using a third standard adjustment coefficient.

[0027] Further, the risk assessment unit determines the risk type of the pipe network based on the evaluation value difference, wherein the evaluation value difference is the difference between the risk evaluation value and the second preset evaluation value:

[0028] If the evaluation value difference is less than or equal to a first preset evaluation difference set by the risk assessment unit, the risk assessment unit determines that the risk type of the pipeline network is a pipeline failure in the pipeline network, and the risk assessment unit issues a pipeline location inspection instruction, and determines the fault node in the pipeline network based on each of the transport flows;

[0029] If the evaluation value difference is greater than the first preset evaluation value difference and less than or equal to the second preset evaluation value difference set by the risk assessment unit, the risk assessment unit determines that the risk type existing in the pipeline network is that the selection of the weight coefficient in the risk assessment model does not meet the standard, and the risk assessment unit sends a model optimization to the model building unit through the instruction transmission unit so that the model building unit determines each of the weight coefficients based on the obtained evaluation value difference;

[0030] If the evaluation value difference is greater than the second preset evaluation value difference, the risk assessment unit determines that the risk type of the pipeline network is a special situation that causes the water flow to be discharged in the pipeline network to be greater than the pipeline network load, and the risk assessment unit sends a node adjustment instruction to the pipeline network through the instruction transmission unit so that the pipeline network determines the opening of the valve at each node based on the discharge flow average value and the delivery flow average value.

[0031] Furthermore, the risk assessment unit is further used to determine whether a single node in the pipe network is a faulty node based on a transport flow difference, wherein the transport flow difference is an absolute value of a difference between the transport flow corresponding to the node and the transport flow average value:

[0032] If the transport flow difference is less than or equal to a preset transport flow difference set in the risk assessment unit, the risk assessment unit determines that the node is a non-faulty node;

[0033] If the delivery flow difference is greater than the preset delivery flow difference, the risk assessment unit determines that the node is a faulty node, marks the node and issues a maintenance notification for the node.

[0034] Furthermore, the model building unit is further used to determine an adjustment method for the second weight coefficient based on the evaluation difference ratio, wherein the evaluation difference ratio is a ratio of the evaluation value difference to the first preset evaluation difference:

[0035] If the evaluation difference ratio is less than or equal to a first preset evaluation difference ratio set in the risk assessment unit, the model building unit uses a first weight correction coefficient to correct the second weight coefficient to a corresponding value;

[0036] If the evaluation difference ratio is greater than the first preset evaluation difference ratio and less than or equal to the second preset evaluation difference ratio set in the risk assessment unit, the model building unit uses the second weight correction coefficient to correct the second weight coefficient to a corresponding value;

[0037] If the evaluation difference ratio is greater than the second preset evaluation difference ratio, the model building unit uses a third weight correction coefficient to correct the second weight coefficient to a corresponding value.

[0038] Furthermore, the pipe network is also used to determine the adjustment mode for each valve based on the discharge flow ratio, wherein the discharge flow ratio is the ratio of the average discharge flow to the average delivery flow:

[0039] If the discharge flow rate ratio is less than or equal to a first preset flow rate discharge ratio set in the risk assessment unit, the pipe network uses a first preset opening adjustment coefficient to adjust the opening of each valve to a corresponding value;

[0040] If the discharge flow rate ratio is greater than the first preset flow rate discharge ratio and less than or equal to the second preset flow rate discharge ratio set in the risk assessment unit, the pipe network uses the second preset opening adjustment coefficient to adjust the opening of each valve to a corresponding value;

[0041] If the discharge flow ratio is greater than the second preset flow discharge ratio, the pipe network uses a third preset opening adjustment coefficient to adjust the opening of each valve to a corresponding value.

[0042] Compared with the prior art, the beneficial effects of the present invention lie in obtaining the water flow rate of each position in the pipeline network, obtaining the discharge flow rate at each discharge outlet of the pipeline network, determining the risk assessment value for a single area through a risk assessment model based on the acquired parameters, and determining whether the pipeline network is at risk based on the risk assessment value. When it is determined that the pipeline network is at risk, corresponding instructions are generated based on the determined reasons, and the risk assessment model is optimized and the opening of each valve in the pipeline is determined based on the instructions, thereby improving the monitoring efficiency of the pipeline network.

[0043] Furthermore, the present invention determines the risk evaluation value through the risk assessment model to determine the specific situation of the pipeline network in the area to predict the situation of the pipeline network. In the actual operation of the pipeline network, the pipeline network may be blocked or damaged, which leads to abnormal drainage in the area. In order to ensure stable drainage, the pipeline network is given a risk warning. However, in the process of monitoring the pipeline network, problems such as the model cannot be adapted to different regions and the abnormal pipeline network is inaccurately located will occur. The present invention preliminarily determines the specific situation of the pipeline network through the calculated risk evaluation value, determines the specific precipitation situation through the average rainfall in the area where the pipeline network is located within a preset period and the area occupied by the pipeline network, determines the building drainage situation through the average drainage of the buildings connected to the pipeline network within a preset period, and determines the drainage situation through the discharge flow The specific discharge situation at the corresponding discharge outlet of the pipeline network is determined by the average value of the volume flow, and the delivery situation of each node of the pipeline network is determined by the average value of the transmission flow. The specific situation of the pipeline network is predicted by the above-obtained parameters. When the average rainfall and building drainage are too much, the pipeline network is at risk of being unable to bear the load. When the average discharge flow and the average transmission flow are too small, the pipeline network is at risk of unsmooth discharge and abnormal discharge. The risk situation of the specific pipeline network is determined by the relationship between the average rainfall and building drainage and the discharge flow and transmission flow. The risk situation of the pipeline network is comprehensively predicted according to the operation of the pipeline network and the specific conditions of the corresponding region. The corresponding risk assessment model is used to calculate and determine each area one by one, which effectively improves the accuracy of pipeline network monitoring and further improves the monitoring efficiency of the pipeline network.

[0044] Further, a risk evaluation value is determined based on each acquired data through a risk assessment model to determine the specific situation of the risk according to the risk evaluation value. When the risk evaluation value is less than or equal to a first preset evaluation value, the pipeline network operates stably. When the risk evaluation value is greater than the first preset evaluation value and less than or equal to a second preset evaluation value, there is a possibility of risk in the pipeline network. Whether there is a risk in the pipeline network cannot be determined only by the risk evaluation value. The historical transport flow average value is further determined to comprehensively determine whether there is a risk in the pipeline network by combining the discharge flow average value and the variance value of the preset number of historical discharge flow average values; when the variance value is less than or equal to the preset variance value, The discharge flow is stable. In this case, the pipeline network operates stably. Because there are individual differences in precipitation and / or drainage in the area where the pipeline network is located, the evaluation standards for a single area are inaccurate. At this time, the evaluation standards are adjusted to effectively improve the pertinence of pipeline risk prediction for each area. When the variance value is greater than the preset variance value, the pipeline network's water transportation has an abnormal change amplitude, and the risk assessment value is too large at this time. The variance value and risk assessment value are used to comprehensively determine that the pipeline in the pipeline network has a fault, and the faulty pipeline node is determined according to each delivery flow rate. While effectively improving the accuracy of pipeline network monitoring, the monitoring efficiency of the pipeline network is further improved.

[0045] Furthermore, the risk type of the pipeline network is determined based on the evaluation value difference. When the evaluation value difference is greater than the second preset evaluation value, the water flow to be discharged in the pipeline network is greater than the pipeline network load. In this case, the opening of the valve at each node is adjusted to ensure the stable operation of each pipeline network. When the evaluation value difference is less than or equal to the first preset evaluation value, a pipeline failure in the pipeline network causes the risk evaluation value to be too large. In this case, the faulty node is checked. When the evaluation value difference is greater than the first preset evaluation value and less than or equal to the second preset evaluation value, the weight coefficient is re-determined to further predict the risk situation of the pipeline network in a single area according to the re-determined risk evaluation value. While determining the early warning model for each area in a targeted manner, the monitoring efficiency of the pipeline network is further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 This is a module block diagram of the urban pipe network risk monitoring system according to an embodiment of the present invention;

[0047] Figure 2 This is a logical decision diagram for determining whether a pipeline network has risks based on risk assessment values ​​in an embodiment of the present invention. DETAILED DESCRIPTION

[0048] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0049] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0050] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0051] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] See also Figure 1 as well as Figure 2 As shown, they are respectively a module block diagram of a risk monitoring system for urban pipe networks according to an embodiment of the present invention, and a logic determination diagram for determining whether a pipe network has risks based on a risk evaluation value; an urban pipe network risk monitoring system according to an embodiment of the present invention comprises:

[0053] The transport and collection unit includes a plurality of node flow collectors arranged at corresponding positions of the pipe network to respectively detect the transport flow of water flow at corresponding pipes;

[0054] The discharge collection unit includes a plurality of discharge flow detectors arranged at corresponding discharge outlets of the pipe network to respectively detect the discharge flow of water flow at each discharge outlet;

[0055] A data collection unit, which is connected to the transport collection unit and the emission collection unit, respectively, for respectively acquiring a number of the transport flows collected by the transport collection unit and a number of the emission flows collected by the emission flow detector;

[0056] A model building unit, which is connected to the data collection unit, and is used to receive the delivery flow and the discharge flow acquired by the data collection unit, and substitute the delivery flow and the discharge flow into its pre-stored risk assessment model to generate a risk assessment value for the pipe network;

[0057] a risk assessment unit connected to the model building unit, for determining whether the pipeline network has a risk based on the risk assessment value output by the model building unit, and, if it is determined that the pipeline network has a risk, generating corresponding instructions based on the determined reasons, the instructions including an assessment value benchmark adjustment instruction, a pipeline location troubleshooting instruction, a model optimization instruction, and a node adjustment instruction;

[0058] An instruction transmission unit is respectively connected to the pipeline network, the model building unit and the risk assessment unit, and is used to transmit the instructions output by the risk assessment unit to the corresponding unit so that the corresponding unit performs corresponding operations, including determining an evaluation value benchmark, locating a faulty pipeline, optimizing the risk assessment model and determining the opening of each valve in the pipeline.

[0059] Specifically, the present invention does not limit the specific structure of the node flow collector and the discharge flow detector, which can optionally be a flow meter or a flow control valve. It can be understood that it is only necessary to obtain the flow of water in the pipeline network. This is a prior art and will not be repeated here.

[0060] Specifically, the present invention does not limit the specific structures of the data collection unit, the model building unit, the risk assessment unit and the instruction transmission unit, which can be logic control components pre-imported into the corresponding program. This is a prior art and will not be repeated here.

[0061] Specifically, the present invention does not limit the specific structure of the valve, and it can be optionally a flow control valve. It can be understood that the area of ​​the corresponding node of the pipe network that allows water to pass can be controlled. This is a prior art and will not be repeated here.

[0062] Specifically, the water flow rate at each location in the pipeline network is obtained, the discharge flow rate at each pipeline network discharge outlet is obtained, and the risk assessment value for a single area is determined through a risk assessment model based on the obtained parameters. Based on the risk assessment value, it is determined whether the pipeline network is at risk. When it is determined that the pipeline network is at risk, corresponding instructions are generated based on the determined reasons, and the risk assessment model is optimized and the opening of each valve in the pipeline is determined based on the instructions, thereby improving the monitoring efficiency of the pipeline network.

[0063] Specifically, the risk assessment model pre-stored in the model building unit is as follows:

[0064]

[0065] Among them, R is the risk assessment value, W is the average rainfall in the area where the pipeline network is located within the preset period, S is the area of ​​the area where the pipeline network is located, G is the average drainage of the buildings connected to the pipeline network within the preset period, α is the first weight coefficient, 0<α<1, Qa is the average value of the discharge flow, which is the average value of the discharge flow, β is the second weight coefficient, 0<β<1 and α+β=1, qa is the average value of the delivery flow, which is the average value of each of the delivery flows.

[0066] Specifically, the present invention determines the risk evaluation value through a risk assessment model to determine the specific conditions of the pipeline network in the area to predict the conditions of the pipeline network. During the actual operation of the pipeline network, the pipeline network may be blocked or damaged, which leads to abnormal drainage in the area. In order to ensure stable drainage, a risk warning is issued for the pipeline network. However, in the process of monitoring the pipeline network, problems such as the model cannot be adapted to different regions and the abnormal pipeline network is inaccurately located will occur. The present invention preliminarily determines the specific conditions of the pipeline network through the calculated risk evaluation value, determines the specific precipitation conditions through the average rainfall in the area where the pipeline network is located within a preset period and the area occupied by the pipeline network, determines the drainage conditions of the buildings connected to the pipeline network within a preset period through the average drainage of the buildings, and determines the drainage conditions of the buildings through the discharge flow. The specific discharge situation at the corresponding discharge outlet of the pipeline network is determined by the average value of the volume flow, and the delivery situation of each node of the pipeline network is determined by the average value of the transmission flow. The specific situation of the pipeline network is predicted by the above-obtained parameters. When the average rainfall and building drainage are too much, the pipeline network is at risk of being unable to bear the load. When the average discharge flow and the average transmission flow are too small, the pipeline network is at risk of unsmooth discharge and abnormal discharge. The risk situation of the specific pipeline network is determined by the relationship between the average rainfall and building drainage and the discharge flow and transmission flow. The risk situation of the pipeline network is comprehensively predicted according to the operation of the pipeline network and the specific conditions of the corresponding region. The corresponding risk assessment model is used to calculate and determine each area one by one, which effectively improves the accuracy of pipeline network monitoring and further improves the monitoring efficiency of the pipeline network.

[0067] Specifically, the risk assessment unit is used to determine whether the pipeline network has risks within the preset period based on the risk evaluation value obtained by the model building unit, wherein:

[0068] If the risk evaluation value is less than or equal to a first preset evaluation value set in the risk evaluation unit, the risk evaluation unit determines that there is no risk in the pipeline network within the preset period, and determines whether there is a risk in the pipeline network within the next preset period based on the risk evaluation value obtained by the model building unit according to the data collected by the data collection unit within the next preset period;

[0069] If the risk assessment value is greater than the first preset assessment value and less than or equal to the second preset assessment value set in the risk assessment unit, the risk assessment unit determines whether there is a risk in the pipeline network within the preset period based on the historical average value of the transport flow rate obtained by the data collection unit;

[0070] If the risk evaluation value is greater than the second preset evaluation value, the risk assessment unit determines that the pipeline network has a risk within the preset period, and determines the type of risk existing in the pipeline network based on the obtained risk evaluation value.

[0071] Specifically, the first preset evaluation value R1 is selected in the interval [0.94W0, 0.96W0], the second preset evaluation value R2 is selected in the interval [1.21W0, 1.32W0], and W0 is the average value of the historical risk evaluation values ​​obtained.

[0072] Specifically, the risk assessment unit is further used to determine whether the pipeline network has a risk within the preset period based on the average value of the discharge flow and the variance value of a preset number of historical average values ​​of the discharge flow, wherein:

[0073] If the variance value is less than or equal to the preset variance value set in the risk assessment unit, the risk assessment unit determines that there is no risk in the pipe network within the preset period, and determines that the reason why the risk evaluation value is greater than the first preset evaluation value is that there are individual differences in precipitation and / or drainage in the area where the pipe network is located, and the risk assessment unit determines the first preset evaluation value and the second preset evaluation value according to the obtained variance value;

[0074] If the variance value is greater than the preset variance value, the risk assessment unit determines that there is a risk in the pipeline network within the preset period and the risk type is a pipeline failure in the pipeline network. The risk assessment unit issues a pipeline location and troubleshooting instruction, and determines the pipeline node where the failure occurs based on each of the transport flows, wherein the failure types include node blockage and node leakage.

[0075] Specifically, the preset variance value is selected within the interval [0.18D, 0.2D], where D is the average value of the historical discharge flow.

[0076] Specifically, a risk assessment value is determined based on each acquired data through a risk assessment model to determine the specific risk situation according to the risk assessment value. When the risk assessment value is less than or equal to a first preset assessment value, the pipeline network operates stably. When the risk assessment value is greater than the first preset assessment value and less than or equal to a second preset assessment value, the pipeline network may be at risk. Whether the pipeline network is at risk cannot be determined only by the risk assessment value. The historical transport flow average is further determined to comprehensively determine whether the pipeline network is at risk by combining the discharge flow average and the variance value of a preset number of historical discharge flow averages. When the variance value is less than or equal to the preset variance value, The discharge flow is stable. In this case, the pipeline network operates stably. Because there are individual differences in precipitation and / or drainage in the area where the pipeline network is located, the evaluation standards for a single area are inaccurate. At this time, the evaluation standards are adjusted to effectively improve the pertinence of pipeline risk prediction for each area. When the variance value is greater than the preset variance value, the pipeline network's water transportation has an abnormal change amplitude, and the risk assessment value is too large at this time. The variance value and risk assessment value are used to comprehensively determine that the pipeline in the pipeline network has a fault, and the faulty pipeline node is determined according to each delivery flow rate. While effectively improving the accuracy of pipeline network monitoring, the monitoring efficiency of the pipeline network is further improved.

[0077] Specifically, the risk assessment unit is further used to determine an adjustment method for the first preset evaluation value and the second preset evaluation value based on the variance difference value, wherein the variance difference value is the difference between the preset variance value and the variance value:

[0078] If the variance difference is less than or equal to a first preset variance difference set in the risk assessment unit, the risk assessment unit generates an evaluation value benchmark adjustment instruction to adjust the first preset evaluation value and the second preset evaluation value to corresponding values ​​using a first standard adjustment coefficient;

[0079] If the variance difference value is greater than the first preset variance difference value and less than or equal to a second preset variance difference value set in the risk assessment unit, the risk assessment unit generates an evaluation value benchmark adjustment instruction to adjust the first preset evaluation value and the second preset evaluation value to corresponding values ​​using a second standard adjustment coefficient;

[0080] If the variance difference is greater than the second preset variance difference, the risk assessment unit generates an evaluation value reference adjustment instruction to adjust the first preset evaluation value and the second preset evaluation value to corresponding values ​​using a third standard adjustment coefficient.

[0081] Specifically, the first preset variance difference value is selected within the interval [0.05D, 0.06D], the second preset variance difference value is selected within the interval [0.08D, 0.09D], the first standard adjustment coefficient is 1.27, the second standard adjustment coefficient is 1.20, and the third standard adjustment coefficient is 1.11.

[0082] Specifically, the risk assessment unit determines the risk type of the pipe network based on the evaluation value difference, wherein the evaluation value difference is the difference between the risk evaluation value and the second preset evaluation value:

[0083] If the evaluation value difference is less than or equal to a first preset evaluation difference set by the risk assessment unit, the risk assessment unit determines that the risk type of the pipeline network is a pipeline failure in the pipeline network, and the risk assessment unit issues a pipeline location inspection instruction, and determines the fault node in the pipeline network based on each of the transport flows;

[0084] If the evaluation value difference is greater than the first preset evaluation value difference and less than or equal to the second preset evaluation value difference set by the risk assessment unit, the risk assessment unit determines that the risk type existing in the pipeline network is that the selection of the weight coefficient in the risk assessment model does not meet the standard, and the risk assessment unit sends a model optimization to the model building unit through the instruction transmission unit so that the model building unit determines each of the weight coefficients based on the obtained evaluation value difference;

[0085] If the evaluation value difference is greater than the second preset evaluation value difference, the risk assessment unit determines that the risk type of the pipeline network is a special situation that causes the water flow to be discharged in the pipeline network to be greater than the pipeline network load, and the risk assessment unit sends a node adjustment instruction to the pipeline network through the instruction transmission unit so that the pipeline network determines the opening of the valve at each node based on the discharge flow average value and the delivery flow average value.

[0086] Specifically, the first preset evaluation difference is selected within the interval [0.18W0, 0.23W0], and the second preset evaluation difference is selected within the interval [0.6W0, 0.8W0].

[0087] Specifically, the risk type of the pipeline network is determined based on the evaluation value difference. When the evaluation value difference is greater than the second preset evaluation value, the water flow to be discharged in the pipeline network is greater than the pipeline network load. In this case, the opening of the valve at each node is adjusted to ensure the stable operation of each pipeline network. When the evaluation value difference is less than or equal to the first preset evaluation value, a pipeline failure in the pipeline network causes the risk evaluation value to be too large. In this case, the faulty node is checked. When the evaluation value difference is greater than the first preset evaluation value and less than or equal to the second preset evaluation value, the weight coefficient is re-determined to further predict the risk situation of the pipeline network in a single area according to the re-determined risk evaluation value. While determining the early warning model for each area in a targeted manner, the monitoring efficiency of the pipeline network is further improved.

[0088] Specifically, the risk assessment unit is further used to determine whether a single node in the pipe network is a faulty node based on the transport flow difference, wherein the transport flow difference is the absolute value of the difference between the transport flow corresponding to the node and the transport flow average value:

[0089] If the transport flow difference is less than or equal to a preset transport flow difference set in the risk assessment unit, the risk assessment unit determines that the node is a non-faulty node;

[0090] If the delivery flow difference is greater than the preset delivery flow difference, the risk assessment unit determines that the node is a faulty node, marks the node and issues a maintenance notification for the node.

[0091] Specifically, the first preset delivery flow rate difference is selected within the interval [0.21qa, 0.26qa].

[0092] Specifically, the model building unit is further used to determine an adjustment method for the second weight coefficient based on the evaluation difference ratio, wherein the evaluation difference ratio is a ratio of the evaluation value difference to the first preset evaluation difference:

[0093] If the evaluation difference ratio is less than or equal to a first preset evaluation difference ratio set in the risk assessment unit, the model building unit uses a first weight correction coefficient to correct the second weight coefficient to a corresponding value;

[0094] If the evaluation difference ratio is greater than the first preset evaluation difference ratio and less than or equal to the second preset evaluation difference ratio set in the risk assessment unit, the model building unit uses the second weight correction coefficient to correct the second weight coefficient to a corresponding value;

[0095] If the evaluation difference ratio is greater than the second preset evaluation difference ratio, the model building unit uses a third weight correction coefficient to correct the second weight coefficient to a corresponding value.

[0096] Specifically, the first preset evaluation difference ratio is selected within the interval [0.31, 0.32], the second preset evaluation difference ratio is selected within the interval [0.52, 0.53], the first weight correction coefficient is 0.9, the second weight correction coefficient is 0.86, and the third weight correction coefficient is 0.81.

[0097] Specifically, the pipe network is further used to determine the adjustment mode for each valve based on the discharge flow ratio, wherein the discharge flow ratio is the ratio of the average discharge flow to the average delivery flow:

[0098] If the discharge flow rate ratio is less than or equal to a first preset flow rate discharge ratio set in the risk assessment unit, the pipe network uses a first preset opening adjustment coefficient to adjust the opening of each valve to a corresponding value;

[0099] If the discharge flow rate ratio is greater than the first preset flow rate discharge ratio and less than or equal to the second preset flow rate discharge ratio set in the risk assessment unit, the pipe network uses the second preset opening adjustment coefficient to adjust the opening of each valve to a corresponding value;

[0100] If the discharge flow ratio is greater than the second preset flow discharge ratio, the pipe network uses a third preset opening adjustment coefficient to adjust the opening of each valve to a corresponding value.

[0101] Specifically, the first preset flow emission ratio is selected within the interval [1.11F0, 1.17F0], the second preset flow emission ratio is selected within the interval [1.28F0, 1.32F0], F0 is the average value of each flow emission ratio when each risk assessment value in the historical data is less than or equal to the first preset assessment value, the first preset opening adjustment coefficient is 1.32, the second preset opening adjustment coefficient is 1.25, and the third preset opening adjustment coefficient is 1.11.

[0102] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

[0103] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A city pipe network risk monitoring system, characterized in that: include: The transport and collection unit includes a plurality of node flow collectors arranged at corresponding positions of the pipe network to respectively detect the transport flow of water flow at corresponding pipes; The discharge collection unit includes a plurality of discharge flow detectors arranged at corresponding discharge outlets of the pipe network to respectively detect the discharge flow of water flow at each discharge outlet; A data collection unit, which is connected to the transport collection unit and the emission collection unit, respectively, for respectively acquiring a number of the transport flows collected by the transport collection unit and a number of the emission flows collected by the emission flow detector; A model building unit, which is connected to the data collection unit, and is used to receive the delivery flow and the discharge flow acquired by the data collection unit, and substitute the delivery flow and the discharge flow into its pre-stored risk assessment model to generate a risk assessment value for the pipe network; a risk assessment unit connected to the model building unit, for determining whether the pipeline network has a risk based on the risk assessment value output by the model building unit, and, if it is determined that the pipeline network has a risk, generating corresponding instructions based on the determined reasons, the instructions including an assessment value benchmark adjustment instruction, a pipeline location troubleshooting instruction, a model optimization instruction, and a node adjustment instruction; An instruction transmission unit, which is respectively connected to the pipeline network, the model building unit and the risk assessment unit, and is used to transmit the instructions output by the risk assessment unit to the corresponding unit so that the corresponding unit performs corresponding operations, including determining the evaluation value benchmark, locating the faulty pipeline, optimizing the risk assessment model and determining the opening of each valve in the pipeline; The risk assessment model pre-stored in the model building unit is as follows: Wherein, R is the risk assessment value, W is the average rainfall in the area where the pipe network is located within a preset period, S is the area of ​​the area where the pipe network is located, G is the average drainage volume of the buildings connected to the pipe network within a preset period, α is the first weight coefficient, 0<α<1, Qa is the average value of the discharge flow, which is the average value of the discharge flow, β is the second weight coefficient, 0<β<1 and α+β=1, qa is the average value of the delivery flow, which is the average value of each of the delivery flows; The risk assessment unit is used to determine whether the pipeline network has risks within the preset period based on the risk evaluation value obtained by the model building unit, wherein: If the risk evaluation value is less than or equal to a first preset evaluation value set in the risk evaluation unit, the risk evaluation unit determines that there is no risk in the pipeline network within the preset period, and determines whether there is a risk in the pipeline network within the next preset period based on the risk evaluation value obtained by the model building unit according to the data collected by the data collection unit within the next preset period; If the risk assessment value is greater than the first preset assessment value and less than or equal to the second preset assessment value set in the risk assessment unit, the risk assessment unit determines whether there is a risk in the pipeline network within the preset period based on the historical average value of the transport flow rate acquired by the data acquisition unit; If the risk evaluation value is greater than the second preset evaluation value, the risk assessment unit determines that the pipeline network has a risk within the preset period, and determines the type of risk existing in the pipeline network based on the obtained risk evaluation value.

2. The urban pipe network risk monitoring system according to claim 1 is characterized in that: The risk assessment unit is further used to determine whether the pipeline network has a risk within the preset period based on the average value of the discharge flow and the variance value of a preset number of historical average values ​​of the discharge flow, wherein: If the variance value is less than or equal to the preset variance value set in the risk assessment unit, the risk assessment unit determines that there is no risk in the pipe network within the preset period, and determines that the reason why the risk evaluation value is greater than the first preset evaluation value is that there are individual differences in precipitation and / or drainage in the area where the pipe network is located, and the risk assessment unit determines the first preset evaluation value and the second preset evaluation value according to the obtained variance value; If the variance value is greater than the preset variance value, the risk assessment unit determines that there is a risk in the pipeline network within the preset period and the risk type is a pipeline failure in the pipeline network. The risk assessment unit issues a pipeline location and troubleshooting instruction, and determines the pipeline node where the failure occurs based on each of the transport flows, wherein the failure types include node blockage and node leakage.

3. The urban pipe network risk monitoring system according to claim 2 is characterized in that: The risk assessment unit is further configured to determine an adjustment method for the first preset evaluation value and the second preset evaluation value based on the variance difference value, wherein the variance difference value is a difference between the preset variance value and the variance value: If the variance difference is less than or equal to a first preset variance difference set in the risk assessment unit, the risk assessment unit generates an evaluation value benchmark adjustment instruction to adjust the first preset evaluation value and the second preset evaluation value to corresponding values ​​using a first standard adjustment coefficient; If the variance difference value is greater than the first preset variance difference value and less than or equal to a second preset variance difference value set in the risk assessment unit, the risk assessment unit generates an evaluation value benchmark adjustment instruction to adjust the first preset evaluation value and the second preset evaluation value to corresponding values ​​using a second standard adjustment coefficient; If the variance difference is greater than the second preset variance difference, the risk assessment unit generates an evaluation value reference adjustment instruction to adjust the first preset evaluation value and the second preset evaluation value to corresponding values ​​using a third standard adjustment coefficient.

4. The urban pipe network risk monitoring system according to claim 3 is characterized in that: The risk assessment unit determines the risk type of the pipe network based on the evaluation value difference, wherein the evaluation value difference is the difference between the risk evaluation value and the second preset evaluation value: If the evaluation value difference is less than or equal to a first preset evaluation value difference set by the risk assessment unit, the risk assessment unit determines that the risk type of the pipeline network is a pipeline failure in the pipeline network, and the risk assessment unit issues a pipeline location inspection instruction, and determines the fault node in the pipeline network based on each of the transport flows; If the evaluation value difference is greater than the first preset evaluation value difference and less than or equal to the second preset evaluation value difference set by the risk assessment unit, the risk assessment unit determines that the risk type existing in the pipeline network is that the selection of the weight coefficient in the risk assessment model does not meet the standard, and the risk assessment unit sends a model optimization to the model building unit through the instruction transmission unit so that the model building unit determines each of the weight coefficients based on the obtained evaluation value difference; If the evaluation value difference is greater than the second preset evaluation value difference, the risk assessment unit determines that the risk type of the pipeline network is a special situation that causes the water flow to be discharged in the pipeline network to be greater than the pipeline network load, and the risk assessment unit sends a node adjustment instruction to the pipeline network through the instruction transmission unit so that the pipeline network determines the opening of the valve at each node based on the discharge flow average value and the delivery flow average value.

5. The urban pipe network risk monitoring system according to claim 4 is characterized in that: The risk assessment unit is further used to determine whether a single node in the pipe network is a faulty node based on a transport flow difference, wherein the transport flow difference is an absolute value of a difference between the transport flow corresponding to the node and the transport flow average value: If the transport flow difference is less than or equal to a preset transport flow difference set in the risk assessment unit, the risk assessment unit determines that the node is a non-faulty node; If the delivery flow difference is greater than the preset delivery flow difference, the risk assessment unit determines that the node is a faulty node, marks the node and issues a maintenance notification for the node.

6. The urban pipe network risk monitoring system according to claim 5 is characterized in that: The model building unit is further used to determine an adjustment method for the second weight coefficient based on the evaluation difference ratio, wherein the evaluation difference ratio is a ratio of the evaluation value difference to the first preset evaluation difference: If the evaluation difference ratio is less than or equal to a first preset evaluation difference ratio set in the risk assessment unit, the model building unit uses a first weight correction coefficient to correct the second weight coefficient to a corresponding value; If the evaluation difference ratio is greater than the first preset evaluation difference ratio and less than or equal to the second preset evaluation difference ratio set in the risk assessment unit, the model building unit uses the second weight correction coefficient to correct the second weight coefficient to a corresponding value; If the evaluation difference ratio is greater than the second preset evaluation difference ratio, the model building unit uses a third weight correction coefficient to correct the second weight coefficient to a corresponding value.

7. The urban pipe network risk monitoring system according to claim 6 is characterized in that: The pipe network is also used to determine the adjustment mode for each valve based on the discharge flow ratio, wherein the discharge flow ratio is the ratio of the average discharge flow to the average delivery flow: If the discharge flow ratio is less than or equal to a first preset discharge flow ratio set in the risk assessment unit, the pipe network uses a first preset opening adjustment coefficient to adjust the opening of each valve to a corresponding value; If the discharge flow ratio is greater than the first preset flow discharge ratio and less than or equal to the second preset discharge flow ratio set in the risk assessment unit, the pipe network uses the second preset opening adjustment coefficient to adjust the opening of each valve to a corresponding value; If the discharge flow ratio is greater than the second preset flow discharge ratio, the pipe network uses a third preset opening adjustment coefficient to adjust the opening of each valve to a corresponding value.

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