JPH0687208B2 - Gate automatic control device - Google Patents

Description

The present invention relates to a gate operation for keeping a water level of a dam, a weir or the like constant.

[Conventional technology]

FIG. 5, FIG. 6, FIG. 7, FIG. 8, FIG. 9 and FIG. 9 are diagrams showing a conventional automatic gate control device disclosed in, for example, Japanese Patent Publication No. 4844232.

FIG. 5 is a block diagram of the entire gate automatic control device,
(1) is a gate, (2) is a motor for opening and closing the gate, (3) is a gear for reducing the rotation of the motor (2),
(4) is an opening transmitter that changes the rotation of the gear (3) into an opening signal, (5) is a float that follows changes in the water surface, and (6) responds to vertical movement of the float to generate a water level signal. Water level transmitters, (7) and (8) are opening signals, communication lines that transmit water level signals from the dam site to the control station, (9) is an opening receiver, (10) is a water receiver, (11) is a constant water level control circuit which inputs a water level signal from this water level receiver and outputs a predetermined opening signal P ₀ , and (12) is this opening signal P ₀ and the actual opening signal P _0.
Is a comparison circuit for generating an operation signal for opening and closing the gate (1) to the motor (2) by comparing

Next, the operation will be described. A gate (1) on the dam side, a motor (2) for opening and closing the gate (1), a gate opening transmitter (4) for detecting the opening of the motor (2) through a reduction gear (3), A float (5) provided on the water surface and a water level transmitter (6) that responds to vertical movement of the float (5) are provided. The signals from the opening transmitter (4) and the water level transmitter (6) are transmitted to the control station via the communication lines (7) and (8). The control station is provided with an opening receiver (9) and a water level receiver (10) to receive these signals. The output of the water level receiver (10) is converted into a predetermined opening signal P ₀ by the constant water level control circuit (11). The opening signal P ₀ and the actual opening signal P given by the opening receiver (9) are compared with each other by the comparison circuit (12).
And when P> P ₀ , a close (down) signal is obtained, and when P <P ₀ , an open (up) signal is obtained, which drives the motor (2) and opens and closes the gate (1). . At this time, if the gate opening from the reference plane is P, the current water level is H, the desired water level is H ₀ , and the water level deviation is ΔH (= H−H ₀ ),
For example, the relationship between ΔH and the discharge Q ₀ (or P ₀ ) may be given as shown in FIG. 7 when the water level rises and as shown in FIG. 8 when the water level falls. A graph of this table is shown in FIG. When the water level is falling, the gate is not operated with a small change in water level by shifting one step from the rising.

FIG. 6 is a float chart of a program in the automatic gate control device. This program is for example 1
It shall be activated every second. First, input the water level data (step 14) and calculate the water level deviation ΔH (step 1).
5) On the other hand, a change in the water level data one second before and the water level data input this time is detected (step 17), and rising (step
If 18) determining the discharge amount Q ₀₁ corresponding to the water level difference △ H in the 7 Figure table T _B (step 38). Water level deviation at the table T _C of Figure 8 if descending (Step 19) △
The discharge amount Q ₀₂ corresponding to H is obtained (step 39). Q ₀₁ or seek opening signal P ₀ at discharge amount Q ₀ and the opening degree of the correspondence table from Q ₀₂ (step 30), and outputs the opening signal P ₀ (step
31) The program ends. If neither rising nor falling, the program ends without doing anything.

[Problems to be solved by the invention]

The conventional automatic gate control device is configured as described above, the discharge amount Q ₀ is a discrete value, and there is a difference from the actual inflow amount Q i, and the water level rises and falls after a certain period of time. ,
Along with that, there was a problem that the gate repeatedly opened and closed.

The present invention has been made to solve the above problems, and an object of the present invention is to obtain an automatic gate control device that can reduce the frequency of the above-mentioned repeated operations.

[Means for solving problems]

The automatic gate control device according to the present invention, when the gate moves up (falls) and moves down (rises), the discharge flow rate at the time of rise, the rising time, and the discharge flow rate at the time of fall and the falling time are converted into the water history. The discharge amount Q ₀ is calculated based on this.

[Action]

The automatic gate control device according to the present invention calculates the discharge amount Q ₀ based on the water history and finely controls the gate opening amount so that the gate opening amount corresponds to the discharge amount Q ₀ .

Example of Invention

An embodiment of the present invention will be described below with reference to the drawings. First
(A) and (B) are flowcharts of a program executed by the automatic gate control device of the present invention. FIG. 2 is a water condition history table used in the program of FIG.
FIG. 3 is a water condition history table based on zero actual operation.
The figure is a graph showing the relationship between the water level deviation ΔH and the discharge rate Q corresponding to FIG. An example of the operation of the invention will be described with reference to FIGS.

This program is, for example, driven every second. First, when the gate operation is in progress (step 13), it ends immediately. When the gate operation is not in progress, the water level data H is input (step 14) and the water level deviation ΔH used in steps (38) and (39) described later is calculated. The reference water level H ₀ should be registered in advance. Next, in order to calculate the rising time or the falling time, the counter C is incremented by one (step 16), the previous water level is compared with the water level H input this time (step 17), and the water level is rising or falling. It is detected (steps 18 and 20). If neither, exit the program. If the water level is rising (falling), the fact that the water level is rising (falling) is detected.
Register (Fo) in the water history table Ta (step
19,21)). The value of the counter C at this time is also stored in the water condition history table Ta, and the stored counter C is cleared to 0 (step 22). Next, it is determined whether or not the fine adjustment flag is present (step 23). The fine adjustment flag is used to continuously discharge the discharge amount Q ₀ before the change even when the water level changes up and down (step 32). When there is no fine adjustment flag, the water level rise flag Fu in the water history table Ta,
And the water level lowering flag F _D is searched (step 24), the steps (25) and (34) are judged, and the water level has rotated for one cycle. → rising → falling → falling is detected, and rising time tu, from the counter value in the water history table
The fall time T _D is calculated (steps 26 and 35), and the discharge flow rate Q ₀ is calculated by the formula shown in step 27 or 36. This formula is a calculation of the discharge amount based on the water history obtained from the fact that the difference between the inflow amount Qi and the discharge amount Q ₀ is inversely proportional to the rising or falling time. When the discharge amount Q ₀ is calculated in this way, a fine adjustment flag is set (step 28). This is for obtaining Q ₀ by the equation shown in step 32 when the next water level change is detected. Both of the judgments in steps 25 and 34
In the case of NO, the discharge flow rate Q ₀ is calculated from the table T _B when rising and the table T _C when descending as usual (step
38, 39).

Next, in step (29), the discharge flow rate Q ₀ is registered in the water condition history table Ta for subsequent control, and the opening degree signal P ₀ is obtained from the discharge flow rate Q _{0 in} the correspondence table of the opening degree signal (step 30 ), And the opening signal P ₀ is output (step 31).

It should be noted that in the above embodiment, the discharge flow rate Q ₀ is the value obtained by the equation in step (27) or (36) and is used as it is. However, in the equation of step (27), Q ′ ₀ = Q ₀ + α, (step with Q _{'0 =} O 0 -α when equation 36) can be a more stable operation.

Further, although the above embodiment has been described as being realized by a computer program, each functional unit may be realized by hardware, and the same effect as that of the above embodiment is obtained.

〔The invention's effect〕

According to the invention, as described above, discharge amount during increase in water level, rise time, and discharge amount during descent, from the lowered time seeking discharge amount Q ₀ which is based on water況履history, this discharge amount Q ₀ Since the gate is operated by the corresponding opening signal P ₀ , the frequency of operation of the gate is reduced, the discharge amount Q ₀ water level H is stable, and it is preferable from the viewpoint of the life of the device such as the gate and the motor. can get.

[Brief description of drawings]

1 (A) and (B) are flowcharts of programs in the automatic gate control apparatus according to an embodiment of the present invention, FIG. 2 is a water condition history table used for automatic gate control in the present invention, and FIG. 3 is in the present invention. A water condition history table according to one operation example of automatic gate control, FIG. 4 is a graph showing a relationship between water level deviation ΔH and discharge amount Q according to one operation example of water level control according to the present invention, and FIG. 5 is an automatic gate control device. FIG. 6 is an overall block diagram, FIG. 6 is a flowchart of a program in a conventional automatic gate control device, and FIG. 7 is a table showing the relationship between the water level deviation ΔH and the discharge Q during rising,
FIG. 8 is a table showing the relationship between the water level deviation ΔH and the discharge amount Q during the descent, and FIG. 9 is a graph of the tables of FIGS. 7 and 8. (1) is a gate, (2) is a motor, (3) is a gear,
(4) is an opening transmitter, (5) is a float, (6) is a water level transmitter, (7) and (8) are communication lines, (9) is an opening receiver, and (10) is a water level receiver. Measuring instrument, (11) is a constant water level control circuit,
(12) is a comparison circuit. In the drawings, the same reference numerals indicate the same or corresponding parts.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-50-114842 (JP, A) JP-A-57-69401 (JP, A) JP-A-57-69422 (JP, A) JP-A-58- 29017 (JP, A) JP 59-57302 (JP, A) Actually opened 48-103794 (JP, U) Actually opened 55-155309 (JP, U) JP-B 56-1647 (JP, B2)

Claims (1)

[Claims] 1. A water level transmitter for detecting a water level, a water level deviation detecting means for detecting a water level deviation between a water level detected by the water level transmitter and a reference water level, and a water level rising from a history of the water level detected by the water level transmitter. Or a rising / falling detection means for detecting whether the water level is falling, and a discharge amount according to the above-mentioned water level deviation is calculated according to the detection result of the rising / falling detection means, and the discharge amount is calculated. In a gate automatic control device having means for controlling the gate opening such that the deviation between the gate opening corresponding to the current gate opening and the current gate opening becomes zero, the water level rises and falls from the detection history of the rising and falling detection means. When it is detected that the discharge is repeated, the discharge amount based on the water history is calculated from the ascending discharge amount, the ascending time, the descending discharge amount, and the descending time, and the gate opening corresponding to the calculated discharge amount is calculated. The current game Gate automatic control apparatus characterized by deviation of the bets opening provided with a means for controlling the gate opening as becomes zero.