JP2864864B2 - Water distribution network display - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system for controlling water distribution facilities for water supply and, more particularly, to an apparatus for performing distribution network analysis and displaying the analysis result.

[0002]

2. Description of the Related Art In a control system of a water distribution system for water supply,
Pipe network analysis is performed to recognize the hydraulic trend of the distribution pipe network. In general, in this pipe network analysis, a method is adopted in which the nodes are appropriately set in the distribution pipe network to model the distribution pipe network, and a flow formula such as the Hesen-Williams equation or a nodal equation is solved to obtain the flow between the nodes. No. 2-264308). The result of the pipe network analysis is usually output to an operator on a CRT display or the like by a man-machine interface. At the time of this output, various measures have been taken in consideration of legibility, such as displaying the distribution pipe network model in various colors or displaying it in various data lists.

[0003]

Generally, in a water distribution control system, it is important to control the amount and pressure of water in a distribution area. However, in a conventional water distribution control system, in the case of a water distribution system having a plurality of reservoirs and water sources (including a groundwater intake system in addition to a surface water purification system in a water treatment plant), the water volume and water pressure at each node are Although it can be recognized from the network analysis data, it was not possible to immediately recognize how the distribution volume from each distribution source was distributed in the distribution area. For this reason, for example, when optimizing the energy level (head) of a distribution source, pipe network analysis is performed by changing the pressure setting value of the distribution source by trial and error until an appropriate amount of water and water pressure are obtained in the entire distribution area. There were problems such as the necessity of repeated complicated work.

SUMMARY OF THE INVENTION [0004] In view of the above-mentioned problems, an object of the present invention is to provide a technique for easily determining an effective water distribution area of each water distribution source in a water distribution control system.

[0005]

FIG. 1 shows the configuration of the present invention. In order to achieve the above object, the present invention comprises a pipe network model display means 1 for displaying a pipe network model constructed of nodes and an inflow / outflow link between the nodes constructed in the pipe network analysis. A water distribution pipe network display device for displaying pipe network analysis data together by means 1 is provided with the following means.

[0006] 1. Flow rate component calculating means 2 for calculating a component of a flow rate at each node for each distribution source. This flow component calculating means 2
Has the following means.

(1) Node selection means 3 for sequentially selecting nodes downstream from a water distribution source.

(2) A total inflow component calculating means 4 for superimposing a component of the inflow from the previous node to the pending node on a distribution source basis to obtain a distribution component of the total inflow at the pending node.

(3) Outflow component calculating means 5 for multiplying the distribution source component of the total inflow by the distribution ratio to obtain the distribution source component of the outflow at the node of concern.

(4) Effective component discriminating means 6 for discriminating an active component from any one of the components of the distribution source of the inflow, the total inflow, and the outflow.

2. Zone setting display means 7 for setting an effective water distribution area of each water distribution source based on the components of each water distribution source, and displaying the effective water distribution area on the pipe network model display means 1.

[0012]

In the present invention, calculations are performed sequentially from the water distribution source side to the downstream side, and the component of the flow rate at each node is determined for each water distribution source. In other words, the distribution volume of each distribution source is first obtained from the pipe network analysis data, and for the subsequent nodes, the total inflow at the concerned node is superimposed by superimposing the components of the outflow from the previous node to the pending node by distribution source. Determine the quantity of each distribution source component. Then, by multiplying the distribution ratio determined from the pipe network analysis data by the distribution source component of the total inflow, the distribution source component of the outflow from the point of concern to the downstream side is obtained. By grasping the flow components at each node in this way, it is possible to appropriately set and display the effective water distribution area of each water distribution source.

In the above calculation, the flow rate (inflow amount,
If the active ingredient is discriminated from the distribution source components (total inflow or outflow) based on an appropriate standard, the generation of trace components can be suppressed, especially in the calculation of the downstream nodes, and the effective distribution area of the effective distribution area can be suppressed. Setting is possible.

[0014]

Embodiments of the present invention will be described below. FIG. 2 schematically shows the system configuration of the water distribution network display device according to this embodiment. The distribution pipe network analysis system 8 performs pipe network analysis using a preset pipe network model.
This distribution network analysis system 8 includes a pipe network model file 9 storing pipe network model data and a pipe network analysis data file 10 storing pipe network analysis data. The man-machine interface 11 is for performing pipe network model display and other input / output processing. The man-machine interface 11 includes an input device such as a mouse 12 and a keyboard 13 or an output device such as a CRT (cathode ray tube) 14. 15 is an input / output interface, 16
Is a memory, and 17 is an MPU (microprocessor unit). The memory 16 stores the distribution network display processing and other procedures.

In this embodiment, processing for displaying an effective water distribution area for each water distribution source is added to the water distribution pipe network display processing.
In this process, first, the components of the flow rate at each node are determined for each distribution source, and the effective distribution area of each distribution source is set based on the determined components.

Here, the flow rate component calculation processing for obtaining the flow rate component for each water distribution source will be described. FIG. 3 shows an outline of the flow rate component calculation processing. First, with reference to the pipe network model file 9 and the pipe network analysis data file 10 of the distribution pipe network analysis system 8, the number n (up to 20) of distribution reservoirs (distribution sources) is set (S1), and the number of distribution reservoirs is determined. setting the water distribution amount q ₁ ~q _n (S2). Then, the nodes to be subjected to the flow component calculation are sequentially selected from the side closer to the reservoir (S3).

Here, the relationship between the inflow and outflow of the nodes in the pipe network model will be described. As shown in FIG. 4, A is an appropriate node in the pipe network model, Q _{I1 to} Q _Im are inflows, Q _{O1 to} Q _Ol are outflows, and q is a nodal outflow. Total inflow (inflow Q _I1 ~
When the Q sum of _Im) and Q _I, the Q _I is represented by formula (1).

[0018]

(Equation 1)

The components for each reservoir at each of the inflows Q _{I1 to} Q _Im can be expressed by the following equation (2) using the water distributions q _{1 to} q _n . Here, k _ij is a component coefficient indicating the content of the reservoir-specific component q _i in the inflow amount Q _Ij .

[0020]

(Equation 2)

Therefore, the components of each reservoir in the total inflow Q _I are expressed by the following equation (3).

[0022]

(Equation 3)

Assuming that the coefficients k ₁₁ ... K _ij ... K _nm are known as a result of the component calculation for each reservoir at the preceding stage, the water distribution amounts q _{1 to} q _n and the inflow amounts Q _{I1 to} Q _Im are determined by the pipe network. because it is known from the analysis data, component coefficient is obtained showing the components of the total inflow Q _I.

Based on this, the MPU 17 refers to the calculation result of the flow rate component at the node located in front of the selected node, and obtains the component coefficient of each inflow at the pending node (S4). And calculating a component coefficient k ₁ to k _n of the total inflow Q _I by accumulating the component coefficient of each inflow (S
5).

Next, components k ₁ · q _{1 for each} reservoir in the total inflow Q _I.
Discriminating the active ingredient from the _{~k n · q n (S6)} . In this processing, for example, _if the largest one is selected from the reservoir-specific components k ₁ · q _{1 to} k _n · q _n and the selected component is k _p · q _p , k _p · q _p / C ( (C is a constant) as a threshold to determine the magnitudes of the components k ₁ · q _{1 to} k _n · q _n for each reservoir. A component larger than the threshold value is set as an effective component, and a component coefficient smaller than the threshold value is set to 0.

Thereafter, the MPU ₁₇ calculates the component coefficients k _{Oi1 to} k _{Oin of the} outflow amounts Q _{O1 to} Q _Ol using the discriminated effective components of the total inflow amount (S7). That is, active ingredient _{k 1 '· q 1 ~k n} ' · q n, and the sum | Q _I '| When, distributing reservoir by components of any runoff Q _Oi in pending nodes in (4) I get it. However, | Q _Oi | runoff obtained from the pipe network analysis data, k _Oi1 ~k _Oin is a component coefficient runoff Q _Oi.

[0027]

(Equation 4)

In this way, the flow component calculation is performed for each node (S3, 8). When the calculation is completed for all the nodes (S8: No), an inflow component table is created (S9). This table indicates which reservoir-specific component the inflow at each node has. That is, the inflow water at an arbitrary node is represented by f (q ₁ , q ₂ , q ₃ ...
q _n ), and q _where the corresponding component coefficient k satisfies k> 0 (or k> C ₁ (C ₁ is a threshold value)) is defined as an element of the f-expression.

When the flow component calculation processing is completed, the flow proceeds to the area setting processing. FIG. 5 shows an outline of the area setting processing. In this process, first, a reservoir is arbitrarily selected (S1). Then, referring to the flow rate component table described above, the boundary of the effective water distribution area corresponding to the selected reservoir is detected (S2).
FIG. 6 shows an example of setting a water distribution area. In the figure, circles indicate nodes, and particularly double circles indicate reservoir nodes. As shown in the figure, the detection of the area boundary is performed by tracing a node serving as the boundary of the effective water distribution area. For tracking this node, for example, a method of drawing a 0 ° horizontal line from the pending node, rotating this horizontal line counterclockwise, and determining whether or not the node hitting this horizontal line belongs to the effective water distribution area is used. Can be. When the first node belonging to the effective water distribution area is detected, the node is stored as a node serving as a boundary of the effective water distribution area, and the next node is tracked based on the node. Wherein the determination of whether it belongs to the effective distribution zone, for example if it is assumed that distribution of the distributing reservoir of interest is represented by q _1, whether contains q ₁ to the elements of the above f formula May be used as a reference. In this way, the boundary of the effective water distribution area is tracked until returning to the start point (S3), and when returning to the start point, the area inside the boundary is registered as an effective water distribution area (S4). This area setting process is executed for all the reservoirs (S5).

The MPU 17 displays the effective water distribution area set by the above procedure on the CRT 14 or the like. At this time, for example, a method such as color display is used as shown in FIG. In the illustrated example, a reservoir-display color collation table is displayed together with the model pipe network diagram, and when a reservoir for which an effective water distribution area is to be displayed is designated, an area corresponding to the effective distribution area on the model pipe network diagram is displayed. Is displayed with a predetermined shading. Even if a plurality of overlapping effective distribution areas are specified, the hatching may be displayed in an overlapping manner.

By displaying such an effective water distribution area, the effective water distribution area of each distribution reservoir can be grasped at a glance, which is extremely effective, for example, in optimizing the pressure setting of the distribution reservoir. For example, looking at the effective distribution area display screen according to the present embodiment, the distribution reservoir affecting the problematic area is narrowed down, and the energy level (head) of the narrowed distribution reservoir is changed arbitrarily to the distribution network analysis system 8. The tuning of the pressure set value can be performed by a method such as performing a pipe network analysis, and this type of work, which has conventionally largely depended on the intuition and experience of the operator, is simplified.

Further, in this embodiment, a mode for incorporating a program related to zone setting display into the man-machine interface 11 of the water distribution network analysis system 8 is adopted. However, the present invention is not limited to this mode. It is also possible to adopt a mode in which a program relating to area setting is incorporated in the main body of the network analysis system 8 to set an effective water distribution area, and the data is given to the man-machine interface 11 and displayed as appropriate.

[0033]

As described above, according to the present invention,
Since the effective distribution area of each distribution source is set and displayed as appropriate,
The operator can easily recognize the distribution of water distribution from the distribution source. Therefore, it is possible to easily understand the relationship between the energy level (head) of each distribution source and the water volume / pressure in each distribution area, etc.
Conventionally, the work of optimizing the set value of the water distribution pressure, which has been a complicated work depending on the intuition and experience of the operator, is simplified.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of the present invention.

FIG. 2 is a block diagram schematically showing a man-machine interface in the water distribution network analysis system according to one embodiment of the present invention.

FIG. 3 is a flowchart showing an outline of a flow rate component calculation process in the embodiment.

FIG. 4 is an explanatory diagram showing a relationship between inflow and outflow amounts of nodes in a pipe network model.

FIG. 5 is a flowchart showing an outline of an effective water distribution area setting process.

FIG. 6 is an explanatory diagram showing an example of setting an effective water distribution area.

FIG. 7 is an explanatory diagram showing a display example of an effective water distribution area.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Pipe network model display means 2 ... Flow rate component calculation means 3 ... Node selection means 4 ... Total inflow amount component calculation means 5 ... Outflow amount component calculation means 6 ... Effective component discrimination means 7 ... Zone setting display means

Claims (2)

(57) [Claims] 1. A pipe network model display means for displaying a pipe network model composed of nodes and inflow / outflow links between the nodes constructed in analyzing a water distribution pipe network, and the pipe network model display means combines pipe network analysis data. A flow rate component calculating means for calculating a distribution source component of a flow rate at each node, an effective distribution area of each distribution source based on the distribution source component, and setting the effective distribution area to the pipe network. A flow rate component calculating means for sequentially selecting nodes from the water distribution source toward the downstream; and a distribution of inflow from the preceding node to the pending node. A total inflow component calculating means for superposing the water source component to obtain a distribution source component of the total inflow at the pending node; and a distribution source component of the outflow at the pending node by multiplying the effective component by the distribution ratio. Water distribution network display apparatus, wherein those having a runoff component calculation means that. 2. The method according to claim 1, wherein the flow rate component calculating means includes an active ingredient discriminating means for discriminating an active ingredient from any one of the components of the distribution source, such as the inflow amount, the total inflow amount, and the outflow amount. A water distribution network display device according to claim 1.