JP2012117278A - Water gate control system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a problem that, in a case of cooperatively managing agricultural water by a plurality of farmers in a water area along a branch line of a trunk line of an agricultural irrigation channel/river, all intake of the agricultural water is stopped if, for example, the agricultural water consumed by any of the farmers who cooperatively manages the agricultural water exceeds a contracted amount because water consumption is decided by a contract between a management of agricultural water who manages the trunk line and a consumer who manages the branch line.SOLUTION: A water gate control system is capable of controlling an opening of a water gate in each water area, so that water consumption does not exceed contracted water consumption contracted with an agricultural water managing association, by detecting fluctuation of the water consumption generated in any of demand area systems with a flow rate monitoring and controlling device installed on a water gate in a water area of agricultural irrigation channel.

Description

  The present invention is a sluice gate control that opens and closes a sluice gate so that agricultural water taken from the main line can be appropriately supplied to subordinate areas in the branch and branch areas connected to the main channel of the agricultural waterway or river Related to system technology.

  Conventionally, large-scale consumers such as agricultural water operate multiple areas (demand areas) on agricultural waterways and river trunks and downstream branch lines / branches, and the water intake in the demand area is the agricultural water management association. The contracted water intake is monitored so that it does not exceed the contracted water intake. ing.

  In other words, many of the sluice gates in the demand area system are monitored independently, but as shown in the system diagram of FIG. 12, considering the effective use of agricultural water, etc. May be used jointly for monitoring. In the example of this figure, the 0th demand area 10 on the trunk line is managed by an agricultural water management association, etc., and the first demand area 11 on the branch line, the second demand area 12 on the branch line, and the third demand. The area 13, the fourth demand area 14,..., The nth demand area 1 n are demand areas managed by large consumers.

  In the 1st demand area 11 which is a branch line, the agricultural water of the flow volume WD is received collectively from the 0th demand area 10 through the sluice gate SW0 of the trunk line, and then the second demand area 12 through the sluice gate of the branch line. , The third demand area 13, the fourth demand area 14,..., The nth demand area 1 n is supplied with the agricultural water having the flow rate WD received by the demand area 1. .

  The second demand area 12 is connected to the branch line of the first demand area 11 and is supplied as the flow rate W2 of the second demand area 12 through the sluice gate SW1-0. The third demand area 13 is connected to the branch line of the first demand area 11, and is supplied as the flow rate W3 of the third demand area 13 through the sluice gate SW1-1. The 4th demand area 14 is connected with the branch line of the 1st demand area 11, and is supplied as flow volume W4 of the 4th demand area 14 through sluice gate SW1-2. Similarly, the nth demand area 1n is connected to the branch line of the first demand area 11, and is supplied as a flow rate Wn of the nth demand area 1n through the sluice gate SW1-n.

  Here, as for the 2nd demand area 12, the 3rd demand area 13, the 4th demand area 14, ..., the nth demand area 1n as a result, all from the 1st demand area 11 and agricultural water Since the supply is received, it is necessary to perform the monitoring control so that the flow rate WD from the 0th demand area 10 which is the main line to the first demand area 11 is within the contracted water intake amount. Specifically, when the flow rate reaches the contracted water intake amount, the main sluice gate SW0 located between the 0th demand area 10 and the first demand area 11 is closed by the agricultural water management association or the like. The monitoring control of the main sluice gate SW0 can be set so that a large-sized consumer who manages the first demand area 11 performs it.

  However, since the agricultural water is jointly managed as described above, the amount of water taken into the first demand area 11 that receives the flow WD from the agricultural water management association, etc. is the amount of water supplied to the second demand area 12, the third The amount of water supplied to the demand area 13, the amount of water supplied to the fourth demand area 14, ..., the amount of water supplied to the nth demand area 1n is also included. Therefore, even if the amount of water used in the first demand area 11 contracted with the agricultural water management association exceeds the contracted water intake amount, the amount of water supplied to the second demand area 12, the third demand area 13, etc. It may be caused by.

  Therefore, in order for the first demand area 11 to grasp the amount of water used more appropriately, not only the amount of water used in the first demand area 11 but also the second demand area 12 to which the agricultural water is supplied. , The amount of water used in the third demand area 13, the amount of water used in the fourth demand area 14, ..., the amount of water used in the nth demand area 1n must be constantly monitored.

  However, the amount of water used in each demand area is not only the amount of water (flow rate) received from the upper demand area, but also the “variation of stored water” in its own demand area. It is not possible to accurately grasp the amount of water used in each demand area simply by measuring.

  Therefore, in some cases, without sufficiently using agricultural water in the first demand area 1, there is a problem that the sluice gate of the trunk line for communication with the agricultural water management association is closed due to violation of the contracted water intake. It was.

  From the above, in order to perform efficient control of the sluice gate, a technology relating to an automatic sluice control method and its device (Patent Document 1), a technology relating to a water level control method and a water level control support method (Patent Document 2), etc. have been proposed. ing.

Japanese Patent Laid-Open No. 02-167912 JP 2004-293199 A

  In the automatic sluice control method and apparatus of Patent Document 1, a small amount of power is generated by a water flow branched from the upstream of the sluice gate, the power is stored in a secondary battery, and the stored power is controlled to open and close the sluice. The system is supplied to the equipment to monitor the required state of the water flow, and the opening and closing of the sluice is automated by controlling the opening and closing of the sluice.

  However, it is a mechanism that diverts a small amount of water from the upstream of the sluice and flows it downstream, generates electricity with a small-scale hydroelectric generator, and opens and closes the sluice gate. There is a problem that the generated power cannot be sufficiently secured by the automatic control method without taking the amount into account.

  In the water level control method and the water level control support method of Patent Document 2, the water gate gate operation of the river is operated to control the water level immediately upstream of the sluice gate, and the operation operation of the gate is instructed to support the water level control upstream of the sluice gate. Technology has been proposed.

  However, in the method of controlling the water level upstream of the sluice gate by opening and closing the gate that can open and close the river sluice gate, the water level measurement step for measuring the water level by the water level measuring means for measuring the water level immediately upstream of the sluice gate, and the measured water level in advance A reference trajectory setting process that gives the water level history as a reference trajectory until the target water level is reached when the target water level is deviated from the target water level, and an error between the reference trajectory and the predicted water level for the predetermined section in the future and the gate opening that is the operation amount. An evaluation function setting step for determining an evaluation function related to degree, an optimization calculation step for calculating a gate opening from a current time at which the evaluation function is minimized to a predicted time in the future, and a current out of the gate opening It will be realized by the gate operation process that opens and closes the gate using only the gate opening, but in the restriction setting of the operation amount and the dead zone setting of the target water level, It is difficult to achieve sufficient water suppression effect when.

  Patent Document 2 is a technique for controlling the “flow rate” of the sluice gate in order to achieve the target water level, and the sluice gate so that the sum of “amount of water used” in a plurality of demand area systems does not exceed a predetermined value. There is no indication of how to adjust the flow rate.

  The present invention has been made in view of such circumstances, and by calculating the actual amount of water used per unit time in each demand area system, the sluice gates of each demand area system should not exceed a predetermined amount of water. It aims at providing the sluice gate control system which can control an opening degree.

  In the sluice gate control system of the present invention, the lower water channel that receives a predetermined amount of water from the upper water channel is composed of a plurality of sections partitioned by one or more sluice gates, and the numerical value of the predetermined water amount is stored. Connected to each other through a network, and the opening and closing of the sluice gate according to a control signal transmitted from the computer. A sluice gate control system that adjusts the amount of water supplied to the plurality of compartments by changing the opening of the device, wherein the calculator includes the amount of water supply per unit time at the start of water supply to the plurality of compartments. A reference value that defines a ratio and opening degree data that defines the opening degree of the sluice gate opening and closing device corresponding to the water supply amount are retained, and the predetermined water amount is allocated based on the reference value Thus, a water supply amount setting value that is a water supply amount per unit time to the plurality of sections is calculated, and the sluice gate opening / closing device is controlled based on the water supply amount setting value and the opening degree data. A gate adjusting means for transmitting a signal via a network, a data storage means for receiving the water level measured by the water level gauge and storing it in association with the measured time, detecting the end of the unit time, By adding the increase / decrease value of the water storage amount calculated from the water level at the start and the water level at the end of the unit time measured by the data storage means to the water supply amount setting value in time, The data calculation means for calculating the actual amount of water used that is the amount of water used per unit time, the water supply amount setting value for the completed unit time, and the actual amount of water used for the unit time are compared, Setting value updating means for updating the reference value to the actual used water amount when it is determined that the amount of water used is large, and the data calculation means is based on the reference value updated by the setting value updating means. The water supply amount setting value in the unit time next to the unit time that has ended is calculated.

  Here, “water channel” refers to rivers, agricultural water, and the like, and “higher water channel” refers to water channels managed by public organizations such as the agricultural water management association. The “lower channel” composed of “a plurality of sections” refers to a form in which, for example, a plurality of agricultural workers or the like jointly manage under a large-scale consumer. The “predetermined water intake” includes, for example, the water intake determined by a contract between an agricultural water management association and a large customer (hereinafter referred to as “contracted water intake”).

  According to the present invention, the contract water intake is equally supplied within the operation time, and if there is a difference in the actual water usage compared to the actual water supply in a certain time zone, it continues next. Since the quick adjustment is performed so that the water supply amount becomes appropriate from the time zone, the contracted water intake amount can be used efficiently.

  Further, in the sluice gate control system of the present invention, the data calculation means stores the calculated actual water usage amount in association with a unit time in the computer, and the reference value at the start of water supply is stored in the past. It is calculated based on the actual amount of water used.

  Here, “the reference value is calculated based on the stored actual use water amount” refers to a case where, for example, the most recent (previous day) actual use water amount is acquired and used as the reference value. In addition, the actual use water volume on the same day of the previous year or the actual use water volume on the day that approximates the weather, temperature, etc. may be used.

  According to the present invention, since the reference value serving as a reference for water supply on the day is determined based on the actual amount of water used before that day, it is possible to operate with high accuracy from the beginning of the operation on the day.

  According to the sluice gate control system of the present invention, a single arithmetic control device opens and closes the sluice gates of a plurality of demand area systems to control the amount of water supply (flow rate) to the lower demand areas, Use the predetermined water volume (contracted water intake) determined as an agricultural water management association, etc. efficiently by updating the set value of the water supply volume at the end of the unit time according to the actual amount of water used in the demand area. Can do.

It is a figure which shows the demand area system | strain to which the sluice gate control system 1 of this embodiment is applied. It is a functional block diagram of the sluice gate control system 1 of this embodiment. It is a structural example of the water level table 541 with which the arithmetic control apparatus 51 of the sluice gate control system 1 of this embodiment is equipped. It is a structural example of the performance use water quantity table 542 with which the arithmetic and control unit 51 of the sluice gate control system 1 of this embodiment is equipped. It is a structural example of the water supply amount setting value table 543 with which the arithmetic control apparatus 51 of the sluice gate control system 1 of this embodiment is equipped. It is a flowchart of the gate adjustment means 524 in the sluice gate control system 1 of this embodiment. It is a flowchart of the data storage means 521 and the data calculating means 522 in the sluice gate control system 1 of this embodiment. It is a flowchart of the setting value update means 523 in the sluice gate control system 1 of this embodiment. It is the figure which showed the control theory of the sluice gate control system 1 of this embodiment. It is a time chart figure of the prediction target value in the sluice gate control system 1 of the modification of this embodiment. It is a time chart figure explaining operation in sluice gate control system 1 of this embodiment. It is a figure explaining the structure of the demand area system | strain in the conventional sluice gate control system 1. FIG.

Hereinafter, an embodiment of a sluice gate control system 1 according to the present invention will be described with reference to the drawings.
The sluice gate control system 1 according to the present embodiment shown in FIG. 1 is used to supply agricultural water for branch lines and branch lines of a system connected to agricultural waterways and river trunks to a large number of agricultural workers. For example, the sluice gates installed on the branch lines / branches of the system are collectively controlled by, for example, an arithmetic control device provided by a large-scale customer, so that each branch line / branch line can be controlled. Manage agricultural water supply. FIG. 1 shows an example applied to the same system as that shown in FIG.

  The sluice gate control system 1 of this embodiment includes a water level detector 111 installed on the downstream side of the sluice gate SW0-0 of the 0th demand area (main line area) 10, and a first demand area (branch area) 11 Sluice gates SW1-0 to 1-n, water level detectors 112 to 11n installed downstream of sluice gates SW1-0 to 1-n, and water levels for monitoring the water levels detected by water level detectors 111 to 11n The monitoring control devices 1DM to nDM and the arithmetic control device 51 connected to the water level monitoring control devices 1DM to nDM via the network 21 are configured.

  The arithmetic and control unit 51 calculates the amount of water supply required for the lower demand area and calculates the opening of the sluice gate so that the flow rate of the sluice gate toward the lower demand area becomes the calculated water supply amount. The sluice gates SW1-0 to 1-n are connected via the network 21, and the calculated opening degree data is transmitted to the sluice gates SW1-0 to 1-n as a signal for controlling the opening / closing operation.

  The sluice gates SW1-0 to 1-n are based on a signal for controlling the opening / closing operation transmitted from the arithmetic and control unit 51. By adjusting the gate opening, the water supply amount (flow rate) calculated by the arithmetic and control unit 51 is realized.

  In this embodiment, the sluice gate SW0-0, the water level detector 110, and the water level monitoring control device 0DM in the 0th demand area (main line area) 10 are managed by an agricultural water management association or the like. In an agricultural water management association or the like, water is supplied from the 0th demand area (main line area) 10 managed by itself to the first demand area (branch area) 11 through the sluice gate SW0-0. In agricultural water management associations, etc., the flow rate of the sluice gate SW0-0 is measured, and when the total value exceeds the contracted water intake per day, the sluice gate SW0-0 is closed and the first demand area ( Water supply to the branch line area) 11 is terminated. In the present embodiment, the contracted water intake amount with the agricultural water management association is distributed equally to the operation time in the demand area.

  Moreover, in the example shown in FIG. 1, although a water level detector, a water level monitoring control apparatus, etc. are not installed in the sluice gates SW2-n in the area of each branch line area 12-1n, it is configured to be installed. May be.

  Here, the arithmetic control device 51 is, for example, an electronic computer or a personal computer, a programmable controller or the like installed under a large-volume consumer, and an arithmetic processing device 52 that performs various arithmetic processing and an external process input. An input device 53-1 for receiving, an output device 53-2 for receiving an output signal from the arithmetic processing device 52 and outputting it to an external process, and the like.

  The input device 53-1 is periodically transmitted from the water level monitoring control devices 1DM, 2DM, 3DM,..., NDM installed at the sluice gates of the demand areas 10, 11, 12, 13, 14,. The transmitted water level data of each demand area is received via the network 21 and transmitted to the arithmetic processing unit 52.

  The output device 53-2 sends a signal for controlling the opening / closing operation of the sluice gates SW1-0 to 1-n in each demand area generated by the arithmetic processing unit 52 via the network 21 to the sluice gates SW1-0 in each demand area. To 1-n switchgear.

FIG. 2 is a functional block diagram of the sluice gate control system 1 of the present embodiment.
In the arithmetic processing unit 52 constituting the sluice gate control system 1 of the present embodiment, the water level data of each demand area received by the input device 53-1, and the sluice gates SW1-0 SW0-0 transmitted by the output device 53-2. 1-n open / close control history data, etc., data storage means 521, data calculation means 522 for calculating actual values of water usage in each demand area from data stored in the data storage means 521, each demand over time Data calculated by the set value updating means 523, the data calculating means 522, and the set value updating means 523 for changing the set value of the water supply amount to the area are controlled for the opening / closing devices of the sluice gates SW1-0 to 1-n in each demand area. Gate adjustment means 524 for transmitting as a signal to be transmitted.

  The storage device 54 included in the arithmetic control device 51 of the present embodiment stores various data necessary for controlling the sluice gates SW1-0 to 1-n.

  First, an outline of data held by the storage device 54 will be described. The water supply amount set value table 543 (FIG. 5) is preliminarily provided with “contracted water intake” data determined by a contract between a large-scale consumer and the agricultural water management association. “Contracted water intake” means the amount of agricultural water per day that the demand area system managed by large customers can take from the 0th demand area (main area) 10 managed by the agricultural water management association, etc. Meaning, it is input from an input device 53-1 such as a keyboard provided in the arithmetic control device 51.

  Here, the agricultural water corresponding to the “contracted water intake” per day is the first that is managed directly by large consumers from the 0th demand area (main line area) 10 managed by the agricultural water management association or the like. All water is taken into the demand area (branch area) 11 via the sluice gate SW0-0. In the present embodiment, the “contracted water intake” per day is distributed equally to the operating time of the demand area system, and the flow rate (water intake) is measured at the sluice gates SW0-0. It is carried out by the agricultural water management association that manages it. That is, when the “contracted water intake” is exceeded due to the passage of operation time, the sluice gate SW0-0 is closed by the agricultural water management association or the like.

  The “contracted water intake” per day taken into the first demand area (branch area) 11 is used as agricultural water in the first demand area (branch area) 11 that is directly managed by large consumers. In addition, since it is used as agricultural water in the second to n demand areas, which are the branch line areas downstream of the first demand area (branch area) 11, each demand from the first demand area (branch area) 11 Water is supplied to the area. That is, the “contracted water intake” per day is the amount of water used in the first demand area (branch area) 11 and the amount of water supplied to the second to nth demand areas which are downstream branch areas. It is the sum.

  Here, the case where the first demand area (branch line area) 11 directly managed by a large-scale consumer receives agricultural water from the upstream zero demand area (main line area) 10 is referred to as “intake”. A case where the first demand area (branch line area) 11 delivers agricultural water to the second to nth demand areas, which are downstream branch line areas, will be described as “water supply”. In addition, since the “water intake” and “water supply (amount of water supply)” indicating the amount of “water intake” and “water supply” are specifically determined by the “opening” of the gate, Are sometimes described as “flow rate”.

  Next, in the sluice gate control system 1 of the present embodiment, in order for each demand area system to perform farm work, water intake from the 0th demand area (main area) 10 to the first demand area (branch area) 11 The operation time that requires water supply to the second to nth demand areas, which are the downstream branch line areas, is determined in advance in the “unit time” of the water supply amount setting value table 543 (FIG. 5). It is input from an input device 53-1 such as a keyboard provided in the control device 51.

  Here, the “contracted water intake amount” is distributed equally to the operation time (in this embodiment, in units of 30 minutes) and stored as “total water supply amount per unit time” in the water supply amount setting value table 543 (FIG. 5). Is done. Furthermore, the “total water supply per unit time” for each unit time is the total amount of water that can be supplied in the corresponding unit time in all demand areas managed by large consumers. This is used as a basis for calculating the amount of water supplied per unit time ("water supply amount setting value of each demand area" in the water supply amount setting value table 543 (FIG. 5)).

  In the sluice gate control system 1 of the present embodiment, in order to effectively use the “contracted water intake” in the first demand area (branch line area) 11 and the second to n demand areas which are downstream branch line areas, Record the actual amount of water used per unit time (actual water usage) in each demand area, and compare the water consumption (flow rate) of the sluice gate with the recorded actual water usage. Set the water supply amount (flow rate) of the sluice gate.

  In addition, in order to perform the sluice gate control system 1 of this embodiment first, the setting initial value of the amount of water supply in the 1st demand area (branch line area) 11 and the 2nd to nth demand areas which are downstream branch line areas Are stored in advance in the “water supply amount setting value calculation table” of the water supply amount setting value table 543 (FIG. 5). Here, the “water supply amount setting initial value” is calculated in proportion to, for example, the size of agricultural land in each demand area by an operator. The calculated “water supply amount setting initial value” is input from an input device 53-1 such as a keyboard provided in the arithmetic and control unit 51.

  Next, the “water level table 541” (FIG. 3), the “actual use water amount table 542” (FIG. 4), and the “water supply amount set value table 543” (FIG. 5) included in the storage device 54 of the arithmetic control device 51 of this embodiment. ) Will be described. Here, the configuration will be mainly described, and the data flow will be described later.

  In the “water level table 541” shown in FIG. 3, the input device 53-1 receives from the water level monitoring control devices 1 to nDM for each predetermined time in each demand area (in the example of FIG. The data of “water level” at every hour on the hour and 30 minutes per hour within the operation time which is the end) is held. Here, the “water level” is numerical data representing the height from the reference plane. In addition, the corresponding demand area is provided with “flow rate” data necessary for receiving a predetermined water supply amount from the upper water area, and the sluice gate SW1-0-1- A “gate opening degree defining table” that prescribes the opening degree of n and the like is held in advance.

  The “actual use water amount table 542” illustrated in FIG. 4 holds data such as “actual use water amount” that is the actual use water amount per unit time in each demand area. In addition, a “water storage table” that stores in advance data such as the “water area” for each water level in each demand area and the “water level difference” is provided.

  In the “water supply amount setting value table 543” shown in FIG. 5, as described above, each demand area holds data on the amount of agricultural water (contracted water intake) that can be taken in one day, and in each demand area, Data such as “water supply amount setting value of each demand area” which is a water supply amount setting value per unit time is also retained.

  In addition, a “water supply amount set value calculation table” is stored in advance that stores initial setting values and the like of the water supply amount for each demand area, which is necessary when the sluice gate control system 1 of the present embodiment is first executed. In this figure, the “water supply amount initial setting value” is shown as a percentage, but it may be “water supply amount” or the like.

[Gate adjustment means 524]
FIG. 6 shows a flow in which the sluice gate control system 1 of the present embodiment is first activated and the “water supply amount set value” is calculated by the gate adjustment unit 524.

  First, the gate adjustment means 524 is activated when the timer provided in the arithmetic control device 51 detects the start of the first “unit time” (S301), and the “contract” held in the “water supply amount setting value table 543” (FIG. 5). The number of water intake data and the number of “unit hours” is acquired (S302), and the value obtained by dividing “contracted water intake” by the number of data of “unit time” (S303), the “water supply amount per unit time” Recorded in “Total” (S304).

  Next, the gate adjustment unit 524 uses the first numerical value of “total water supply amount per unit time” included in the “water supply amount setting value table 543” (FIG. 5) as the “water supply amount setting value calculation table” (FIG. 5). The amount of water supplied to each demand area is calculated by allocating at the ratio for each demand area in the “water supply amount setting initial value” (S305), and the “water supply in each demand area” in the first “unit time” It is recorded as “amount set value” (S306).

  The gate adjusting means 524 divides the “water supply amount setting value of each demand area” in the first unit time for each demand area by the fraction of unit time (30 minutes), thereby obtaining a predetermined water supply amount from the upper water area. The “flow rate” per minute to be received is calculated (S307), and recorded in the “flow rate per unit time” of the “water level table 541” (FIG. 3) (S308).

  Next, the gate adjusting means 524 acquires “gate opening” data corresponding to the “flow rate” of each demand area from the “gate opening regulation table” (FIG. 3) of the water level table 541 (S309). Then, a signal for controlling the switchgear in the sluice gates SW1-0 to 1-n in each demand area is transmitted, and the process ends (S310).

  The open / close devices of the sluice gates SW1-0 to 1-n in each demand area perform the open / close operation of the sluice gates SW1-0 to 1-n in accordance with the received control signals, respectively, from the upper demand area to the lower demand area. Then, water supply with the set water supply amount is started.

  In the present example, each of the sluice gates SW1-0 to 1-n has a “gate opening degree definition table” and corresponds to “flow rate” in order to realize a predetermined “water supply amount” (flow rate). The “gate opening degree” is defined, but when the sluice gates SW1-0 to 1-n themselves have a gate opening / closing function for realizing a predetermined “water supply amount” (flow rate), such a function is required. May be used.

  In addition, since the operating hours of each demand area are the same, “total water supply per unit time” is simply a value obtained by dividing “contracted water intake” by the number of data in “unit time”. It is possible to set different numerical values for each unit time by reflecting the driving situation.

  For example, when there is a sufficient amount of water stored in the first demand area 11 that is a branch line area, the temporarily increased water supply amount is not covered by the water stored in the first demand area 11. It can also be set to be within the range of.

[Data storage means 521, data calculation means 522]
Next, in FIG. 7, the flow of storing the data in the “water level table 541” (FIG. 3) by the data storage unit 521 and the data calculation of the “actual use water amount table 542” (FIG. 4) by the data calculation unit 522 are performed. The flow to be performed is shown.

  First, the data storage means 521 is activated when the timer provided in the arithmetic control device 51 detects the end of the unit time (S101), and the water level data transmitted from the water level monitoring control devices 1 to nDM is stored in the “water level table 541” ( After recording in FIG. 3) (S102), the data calculation means 522 is activated and the process is terminated (S103).

  The data calculation means 522 acquires the water level data input to the “water level table 541” (FIG. 3), and the “unit time” in the “unit time” of the “actual use water volume table 542” (FIG. 4) ends. Input the “water level” and the “water level at the start” in the next “unit time” (S104), and calculate the “fluctuated water storage” at the start and end of the storage in the corresponding demand area. (S105). Specifically, in the sluice gate control system 1 of the present embodiment, the water amount corresponding to the difference between the “water level at the start” and the “water level at the end” of the “unit time” is set as the “water level” of the “water storage table”. The total value is calculated by obtaining from “the amount of difference water”.

Next, the data calculation means 522 records the total amount of water calculated from the “water level difference water amount” in the “fluctuated water storage amount” (FIG. 4) of the corresponding “unit time” (S106).
The data calculation means 522 integrates the “water supply amount per unit time” included in the “water level table 541” (FIG. 3) and the fraction of unit time (30 minutes), and the result is obtained as the “actual use water amount table 542” ( It is recorded in “Total amount of water supply per unit time” in FIG. 4) (S107).

  In the present embodiment, since the opening degree of the sluice gates SW1-0 to 1-n can be calculated so that the calculated water supply amount is obtained, such a value is provided in the “water supply amount setting value table 543” (FIG. 5). It is good also as a water supply amount setting value of each demand area ". Further, the data recording means 521 can obtain more accurate values by acquiring the history data of the flow rate (water supply amount) actually measured by the sluice gates SW1-0 to 1-n.

  Next, the data calculation means 522 adds the “total amount of water supply per unit time” and the “fluctuated water storage amount” (S108), and the corresponding “unit time” in the “actual use water amount table 542” (FIG. 4). ”And“ actual water usage ”, the set value update unit 523 is activated to end the process (S109).

  Here, “actual water use” is the amount of water received in unit time (total amount of supply per unit time) plus the increase / decrease value of the amount of water stored in the corresponding demand area. It shows the amount of agricultural water actually used in time.

  In addition, about the 1st demand area 11 which is a branch line area, since water supply is not received from the 0th demand area 10 which an agricultural water management association etc. manage except collective water intake, “Amount” becomes “Actual water consumption” as it is.

[Set value update means 523]
Next, FIG. 8 shows a flow of updating the “water supply amount setting value” (FIG. 5) in the “water supply amount setting value table 543” by the setting value update unit 523.

  First, the set value update unit 523 activated in S108 of FIG. 7 refers to the data of “actual use water amount” of each demand area in the “unit time” completed in the “actual use water amount table 542” (FIG. 4). (S201). Next, the set value update means 523 refers to the data of “water supply amount setting value of each demand area” of the corresponding “unit time” in the “water supply amount setting value table 543” (FIG. 5) (S202). Then, a comparison determination is made between the data of “actual water use amount” and the data of “water supply amount setting value of each demand area” (S203).

  As a result of the determination, only when it is determined that the “actual water use amount” data is larger (“YES” in S204), the set value update means 523 determines in the “water supply amount set value calculation table” (FIG. 5). The “actual water usage” data is stored in the “reference value of the water supply amount setting value” in the corresponding demand area (S205).

  On the other hand, as a result of the determination, if it is determined that the “actual water use amount” data is smaller or the same (“NO” in S204), the “reference value of the water supply amount setting value” is not updated. That is, since the “reference value of the water supply amount setting value” of the corresponding demand area stores the data of the “water supply amount setting value of each demand area” in the previous unit time, the numerical value is not changed as it is.

  When the “reference value of the water supply amount set value” is stored, the set value updating means 523 calculates the composition ratio of each demand area from the sum of the “reference value of the water supply amount set value” of all the demand areas. (S206), the "total water supply per unit time" of the "unit time" following the corresponding "unit time" is multiplied by the composition ratio of each demand area (S207), and the "water supply amount set value" The calculated numerical value is stored in the “unit time” corresponding to the “water supply amount setting value of each demand area” in the “calculation table” (FIG. 5) (S208).

  Next, by dividing the “water supply amount setting value for each demand area” for each demand area by the unit time (30 minutes), the “water supply amount” (flow rate) per minute for receiving water from the upper water area, respectively. The calculated value is stored in the “water level table 541” (FIG. 3), and the gate adjusting means 524 is activated to end the process (S209).

  Thereafter, the gate adjusting unit 524 performs the processes of S309 to 311 shown in FIG. Specifically, data of “gate opening” corresponding to “flow rate” of each demand area is acquired from the “gate opening regulation table” (FIG. 3) of the water level table 541 (S309), and each demand area A signal for controlling the switchgear in the sluice gates SW1-0 to 1-n is transmitted and the process is terminated (S310).

  In this embodiment, the unit time is “30 minutes”, but can be arbitrarily set according to the application. In addition, although the calculation of the target water usage per time zone is performed uniformly, it can be managed more finely by setting each time zone of each demand area individually.

  In FIG. 6, when the sluice gate control system 1 according to the present embodiment is first activated, the “water supply amount initial setting value” provided in advance in the “water supply amount setting value calculation table” is used to obtain the initial unit time. Although it was decided to calculate the “water supply amount setting value for each demand area” (FIGS. 5 and 6), in the second and subsequent activations, for example, the “reference value of the water supply amount setting value” for the last unit time of the previous day The composition ratio of each demand area is calculated from the sum of the above, and the value obtained by dividing the "total water supply per unit time" in the first unit time of the next day by the composition ratio is It can also be set to the “demand area water supply amount set value”. Thereby, since it can be set as the numerical value according to the latest driving | operation performance, it can be set as distribution of agricultural water with higher precision.

  FIG. 9 shows the control principle of the sluice gate control system 1 after the water supply amount set value (target water use amount) is set based on the contracted water intake amount described above (FIGS. 5 and 6). The water level monitoring control device 1DM in the first demand area 1 and the respective water level monitoring control devices 2DM, 3DM, 4DM,..., NDM are monitored so as to be within the range of the water supply amount set value (target water usage amount). Performed (FIGS. 3, 4, and 7). Here, the “water supply amount setting value” will be described using the term “target water consumption” from the meaning of “target value” of the water usage. In addition, the update of the water supply amount set value (target water usage amount) has been described above and will not be described here.

First, “LPD” is a “demand water consumption judgment line” that serves as a criterion for determining whether or not the demand for water consumption (hereinafter referred to as “demand water usage”) is within the range of contracted water intake. Yes, “PT” is the total amount of actual used water up to now (hereinafter referred to as “cumulative used water”), “P” is the predicted amount of water used, and “t” is the time limit (time) up to the present time. The predicted water consumption (P) is
P = PT + ΔPT (T−t) (1)
It is represented by

However, ΔPT is the total amount of accumulated water used in the time limit (time) “t”. Therefore, the adjusted usage water amount (PC) for controlling the usage water amount value to the target usage water amount (PD) level within the time difference (T−t) is shown below.
PC = (P-PD) (2)

  From (2), if adjusted water usage (PC)> 0, P> PD and the predicted water usage (P) is larger than the target water usage (PD), so that the expected water usage exceeds the contracted water intake. By judging, the sluice gate is opened and closed compared to the amount of water that can be saved when the sluice gate is closed.

  According to the control principle of the method for adjusting the demand water usage mentioned above, the opening and closing of the sluice gate is based solely on the contracted water intake with the agricultural water management association, etc., and if the actual water usage exceeds the target water usage, This will close the sluice gates of the branch and branch lines.

  For this reason, in the sluice gate control system 1 of the present embodiment, after the target water usage per unit time for each demand area system is set, the target water usage and actual results are obtained depending on weather conditions such as bank breakage, rainfall, and sunshine. It is characterized in that adjustment is performed when there is a difference between the amount of water used. The adjustment method will be described below.

  In addition, the sluice gate control system 1 of embodiment described by this figure does not use agricultural water in the 1st demand area (branch line area) 11, but is all the agricultural water in a downstream branch area. Water is supplied to the second to nth demand areas.

  In the sluice gate control system 1 of the present embodiment, the arithmetic processing unit 52 includes a set value update unit 523, and automatically updates the target water usage amount for each preset demand area based on the data of the actual water usage amount in each demand area. can do.

  That is, the set value update means 523 is the sum of the actual use water amount per unit time of each demand area stored by the data calculation means 522 and the target use water amount per unit time in each preset demand area. If the total value of the actual usage water amount is determined to be larger, the target usage water amount per unit time is calculated again thereafter, and the water supply amount setting value table 543 (FIG. 5) is obtained. Update the retained value. Next, the gate control means 524 outputs a signal for controlling the opening degree of the sluice gate according to the result to the output device 53-2.

  As described above, in the area of the branch line (first demand area 11) that is directly connected to the main line of the agricultural waterway, the amount of water intake by the contract with the agricultural water management association is fixedly set. On the other hand, the amount of water used in the second demand area 12, the amount of water used in the third demand area 13, the amount of water used in the fourth demand area 14, ..., the amount of water used in the nth demand area 1n is described above. The target water consumption is set and monitored with the contracted water intake set in one demand area 11 as the upper limit.

  It should be noted that the target water usage amount in the first demand area 11 is automatically updated by the arithmetic processing unit 52 every time prediction control is completed for a certain unit time. A time chart for such automatic update of the target value will be specifically described with reference to FIG.

  FIG. 10A shows the amount of water used every 30 minutes in the second demand area 12. (B) is the amount of water used every 30 minutes in the third demand area 13. (C) is the amount of water used every 30 minutes in the nth demand area 1n.

At the start of predictive control, the data calculation means 522 uses the target value in unit time from 0 minutes to 30 minutes, and the target water usage (Σ1), which is the target water usage PD of the entire system equipment, in unit time (6 in this example). Is set to the contracted water intake W _1-1 for the unit time of the first demand area 11 obtained by dividing by the above, so that the contract water intake W _1-1 is not exceeded by the gate adjusting means 524. Adjust the opening of the sluice gate. And in 30 minutes at the end, water consumption _{W 2-1} of the second demand area 12, water consumption _W 3-1 of the third demand areas 13,..., Water consumption _{W n} demand area 1n of the n _When it is ₋₁ , the second water usage amount Σ2 from 30 minutes to 60 minutes is determined as follows.

That is, the set value updating means 523 has the same target unit water consumption Σ1 (= contracted water intake W _{1-1 for} the unit time of the first demand area 11) in the previous unit time and the second in the same unit time. The total amount ΣW _{k−1 (k = 2, 3,..., N) of the} amount of water used in each nth demand area is compared. The state to be compared is shown in FIG.
When Σ1 <ΣW _k−1 , the target water usage amount Σ2 is updated to the total value ΣW _k−1 (Σ2 = ΣW _k−1 ). On the other hand, when Σ1> ΣW _k−1 , the target water consumption amount Σ2 is not updated and Σ2 = Σ1.

Similarly, the target water usage amount Σ3 in the third unit time from 60 minutes to 90 minutes is the same unit time as the target water usage amount Σ2 in the second unit time immediately before (Σ2 = ΣW _{k−1 in the second} ). The total value ΣW _{k−2 of the} amount of water used is compared.

As shown in FIG. 10, in the case of Σ2> ΣW _k−2 , the target water consumption Σ3 is not updated and Σ2 = Σ3. On the other hand, when Σ2 <ΣW _k−2 , the target water usage amount Σ3 is updated to the above value. That is, Σ3 = ΣW _k−2 .

The target water consumption amount Σ4 in the fourth unit time from 90 minutes to 120 minutes is the same method, and the target water consumption amount Σ3 and the total value ΣW _k-3 are compared. When Σ3 <ΣW _k-3 , The amount of water used Σ4 is updated to the above total value. That is, Σ4 = ΣW _k−3 .

Further, for the target water consumption amount Σ5 in the fifth unit time from 120 minutes to 150 minutes, the target water consumption amount Σ5 and the total value ΣW _k-4 are compared with each other, and when Σ4 <ΣW _k-4 , Then, the target water usage amount Σ4 is updated to the total value. That is, Σ5 = ΣW _k−4 .

As described above, the set value update unit 523 has the target usage water amount ΣM in an arbitrary unit time in the first demand area 11 and the target usage water amount ΣM-1 in the previous unit time and the unit usage time in the unit time. compared to the total value of the target water consumption ΣW _{k- (M-1),} the sum ΣW _{k- (M-1)} is updated to the sum value when the target amount of water used? M-1 greater than the equal Will not be updated.

FIG. 11 illustrates an operation in which the first to nth demand areas 11 to 1n are operated and the set value update unit 523 performs the prediction control.
The demand usage water amount determination line LPD is a demand usage water amount determination line in which the target usage water amount PD is uniformly used in each unit time from 0 to 150 minutes. Further, the demand water usage determination lines LPD-2, LPD-4, and LPD-5 are respectively unit times corresponding to the usage water amounts Σ2, Σ4, and Σ5 set in the second, fourth, and fifth unit times, respectively. It is a demand usage water quantity judgment line when it is supposed to continue from to the end.

Specifically, each of the demand water usage determination lines LPD-2, LPD-4, and LPD-5 is set to the total value of each target value in each unit time that is smaller than the self at the start time of the corresponding unit time. The self target value is added, and the drawing is made so as to pass the water usage amount and the target water usage amount PD at the final time.
The target water consumption amount Σ3 for the third unit time is omitted because it is equal to the target water consumption amount Σ2 for the second unit time.

  Therefore, in each unit time, the set value update unit 523 may control so that the accumulated water usage does not exceed the demand water usage determination curves LPD-2, LPD-4, and LPD-5 corresponding to the corresponding unit time. .

Specifically, the predictive control is started, and even if the accumulated water usage exceeds the demand usage water usage determination line LPD in the first unit time, the closing signal is not sent to the sluice gate in each demand area. However, when the second unit time starting from 30 minutes is started, the accumulated usage amount exceeds the demand usage amount judgment line LPD-2 obtained from the target usage amount Σ2 corresponding to the second unit time. A closing signal is sent from the output device 53-2 to the sluice gate opening and closing devices of the demand areas L1, L2, L3,..., Ln at the time when the second unit time is started.
When the opening / closing device of the sluice gate in the demand area is closed, the increase rate of the accumulated water consumption decreases and becomes less than the demand water usage judgment line LPD-2.

  Next, in the 4th unit time from 90 minutes to 120 minutes, it determines using the demand usage water amount determination line LPD-4 with respect to target usage water amount (SIGMA) 4. When the accumulated water usage exceeds the demand water usage judgment line LPD-4 at point b in the fourth unit time, a closing signal is sent to the gate gate opening / closing device for each operating demand area.

  Similarly, in the 5th unit time from 120 minutes to 150 minutes, it determines using the demand usage water amount determination line LPD-5 with respect to target usage water amount (SIGMA) 5. When the actual usage water volume exceeds the demand usage water volume determination line LPD-5 at the point c in the fifth unit time, a closing signal is sent to the sluice gate opening and closing device for each operating demand area.

  In this way, the amount of water used in each demand area during operation is such that the actual amount of water used for each unit time does not exceed the demand water consumption determination line LPD-M obtained by the target water consumption amount ΣM set in the corresponding unit time. By reducing the value, it is possible to prevent the actual usage water amount from exceeding the target usage water amount PD at the end point of the time limit of the unit time. Specifically, the set value updating means 523 causes the gate adjusting means 524 to send a sluice gate closing signal to each operating demand area so that the corrected target water usage is obtained.

  In addition, the target water usage amount per unit time is not based on a fixed value, but is updated based on the total value of the results in the previous unit time. Accordingly, the sluice gate can be opened and closed at an appropriate timing without delaying in a timely manner.

  Therefore, it is possible to reduce the probability that the accumulated water usage exceeds each demand usage water usage determination line, and it is possible to reduce the probability that the sluice gate that stops the supply to each demand area is forcibly closed.

  In addition, the opening / closing operation of the sluice gate by the gate control means 524 of this embodiment is performed by adjusting the opening degree of the sluice gate at the same ratio according to the fluctuation of the water supply amount set value.

  However, in the arithmetic processing unit 52 of the arithmetic control unit 51, the demand area connected to the sluice gate, the demand area where the sluice gate may be closed urgently, and the demand area which should not be closed should be classified. May be. As a result, the priority for closing the sluice gate can be closed at any time, and it can be classified into demand areas that can be closed in an emergency and demand areas that cannot be closed in an emergency. In this case, the influence on the whole can be minimized.

  Further, in order to reduce the water supply amount to a set value or less, it is preferable to output an alarm from the arithmetic processing unit 52 to each demand area when the sluice gate connected to each demand area is closed.

  In this embodiment, the water supply amount setting value for the entire demand area system is updated based on the total value of the actual used water amount in each demand area. However, a change in the actual used water amount in each demand area is detected. Thus, it is possible to set the sluice gates in the branch / branch area to be opened and closed individually.

Specifically, although there is no change in the total value of the actual use water amount, the set value update unit 523 is activated when an increase or decrease in the actual use water amount exceeding a certain range is detected in an individual demand area. Then, based on the total value of the actual amount of water used per unit time (FIG. 4), the distribution of the water supply amount setting value in each demand area is recalculated (FIG. 5). Here, the set value updating means 523 activates the gate adjusting means 524 to finish the process, and the gate adjusting means 524 determines the sluice gate of each demand area according to the updated water supply amount setting value of each demand area. Generate and send an open / close signal.
Thereby, since the contracted water intake amount can be finely distributed to each demand area, it is possible to more appropriately operate each demand area.

  As described above, according to the sluice gate control system 1 of the present embodiment, the contracted water intake amount can be efficiently used in a water area such as an agricultural waterway that is jointly managed by a plurality of agricultural workers or the like.

DESCRIPTION OF SYMBOLS 1 Sluice gate control system 10 0th demand area 11 1st demand area 12 2nd demand area 13 3rd demand area 14 4th demand area 1n nth demand area 21 Network 51 Arithmetic control device 52 Arithmetic processing Device 53-1 Input device 53-2 Output device 54 Storage devices 110, 111, 112, 113, 114,..., 11n Water level detector 521 Data storage means 522 Data calculation means 523 Set value update means 524 Gate adjustment means 541 Water level table 542 Actual use water volume table 543 Water supply volume setting value table SW0, SW1, SW2, SW3, SW4,..., SWn

Claims (2)

The lower water channel that receives a predetermined amount of water from the upper water channel is composed of a plurality of sections partitioned by one or more sluice gates,
Control transmitted from the computer by connecting a computer in which the numerical value of the predetermined water amount is stored, a water level meter installed in each of the plurality of sections, and a switching device provided in the sluice gate via a network A sluice gate control system that adjusts the amount of water supplied to the plurality of sections by changing the opening of the sluice gate opening and closing device according to a signal,
The calculator includes a reference value that defines a ratio of the amount of water supply per unit time at the start of water supply to the plurality of compartments, and an opening degree that defines the opening degree of the sluice gate opening / closing device corresponding to the water supply amount Hold data,
By allocating the predetermined water amount based on the reference value, a water supply amount setting value that is a water supply amount per unit time to the plurality of sections is calculated, and based on the water supply amount setting value and the opening degree data. Gate adjusting means for transmitting a signal for controlling the sluice gate opening and closing device via a network;
Data storage means for receiving the water level measured by the water level gauge and storing it in association with the measured time;
By detecting the end of the unit time, the water supply amount set value in the unit time is set to the increase / decrease value of the stored water amount calculated from the water level at the start of the unit time and the water level at the end of the unit time measured by the data storage means. A data calculation means for calculating the actual amount of water used, which is the amount of water used in the unit time in the plurality of sections, by adding,
Comparing the set value of the water supply amount in the completed unit time with the actual use water amount in the unit time, and when it is determined that the actual use water amount is large, the reference value is updated to the actual use water amount Setting value updating means;
With
The data calculation means calculates the water supply amount set value in a unit time next to the unit time ended based on the reference value updated by the set value update means. The data calculation means stores the calculated actual use water amount in association with a unit time in the computer,
The sluice gate control system according to claim 1, wherein the reference value at the start of water supply is calculated based on the actual use water amount stored in the past.

Images