JPS6280713A - Water level control device - Google Patents

Abstract

PURPOSE:To prevent influence due to disturbance such as the partial water level vibration of a water surface or the partial change of the water level and to make control appropriate by arranging a water level estimating device for checking whether a measured value is included within a fixed changing width or not, accumulating the measured value and estimating the water level on the basis of the accumulated value. CONSTITUTION:A water level is measured, the measured value is transmitted to the water level estimating device 5 through a signal line 6 and a forecasting value of the water level is calculated by the device 5. The obtained forecasting value is transmitted to a gate control device 7 through the signal line 6 and the device 7 calculates a gate controlled variable corresponding to the obtained water level forecasting value and transmits a gate control output signal to a gate estimating device 8 through a signal line 9. The device 8 drives a gate opening/closing motor to open/close the gate and control the water level at a fixed value.

Description

[Detailed Description of the Invention] [Industrial Application Meter] The present invention relates to a water level control device that is combined with a water level measuring device and controls the water level by opening and closing a gate based on the data.

[Conventional technology]

FIG. 3 is an explanatory diagram of a water level control device combined with a water level measuring device shown in, for example, Japanese Patent Application No. 59-239367. In the figure, (1) shows the water level measuring device installed on the water surface (A). Outer box, (2) is a float provided inside the outer box (1), (3) is a conversion device attached to the top of the outer box (1), and (4) is a float (2) and a conversion device (3). ), (7) is a gate control device that controls the opening and closing of the gate based on the water level value obtained from converter (3), and (6) is a signal that transmits a signal from converter (3) to gate control device (7). This is a signal line for In addition, (8) is a gate drive device that receives the output from the gate control device and drives a motor for opening and closing the gate, and (9) is a signal that receives a signal from the gate control device (7) to the gate drive device (8). Signal line to transmit (10)
is a gate.

The conventional water level control device is configured as described above, and when controlling the water level, the outer box of the water level measuring device (
1) Install. When the water level at the measurement point changes, flow 1-
+2) fluctuates up and down, the spring (4) expands and contracts in accordance with this, and the pressure change caused by this expansion and contraction is applied to the converter (3).
) is converted to the measured water level and the water level minus value is obtained. This water level value is transmitted to the gate control device (7), and it is determined whether or not gate control is required to cope with the water level change. When gate control is required, a signal is transmitted to the gate drive device (8) via the signal line (9), and the motor for opening and closing the gate is driven to control the water level at a constant value.

[Problem that the invention seeks to solve]

Conventional water level control devices such as those described above use water level values measured at one point, so water level vibrations due to excessive disturbance of a part of the water surface due to discharge of stored water, etc., or partial water level changes due to waves caused by wind force. Since the water level is directly measured as a water level, highly accurate measurement values cannot be obtained, which may lead to control hunting in some cases.Also, since the data is an instantaneous value, the water level may be rising or falling. However, there are problems in that it is difficult to keep the water level constant unless continuous measurements are taken and controls are carried out each time the water level changes.

The present invention has been made to solve these problems, and it eliminates water level vibrations, water level changes, etc. that occur locally on the water surface, obtains a highly accurate water level, and uses this water level to estimate the predicted water level. By setting this predicted water level as the target of control, the number of gate controls can be reduced.
The purpose is to obtain a Bakaro water level control device that optimizes gate control.

[Means for solving problems]

The water level control device according to the present invention includes a water level measuring device including a float, a spring that expands and contracts as the float moves up and down, and a conversion device that converts pressure changes caused by the expansion and contraction of the spring into a water level value; A motor is driven by the output of the gate control device, with a water level estimation device that calculates the predicted water level based on the water level value measured by the measurement device, and a gate control device that controls the opening and closing of the gate using the output of this water level estimation device. The water level is controlled by operating the gate drive device to open and close the gate.

[Effect]

In this invention, the water level is predicted based on the measured value, so even if a partial water level vibration -1 water level change occurs on the water surface,
Since the influence can be prevented and the range of control can be predicted in advance, the number of times of control can be reduced and appropriate control can be performed, resulting in a highly accurate water level control device.

〔Example〕

FIG. 1 is an explanatory diagram showing one embodiment of the present invention.

In the figure, (1) to (4) are the same as the conventional device described above. (5) is a water level estimation device for predicting the water level based on the measured value transmitted from the conversion device (3); (6)
is the predicted value from the water level estimation device (5) and the gate control device (
The signal line (7) is a gate control device that receives the predicted value calculated by the water level estimation device (5), performs gate control, and has the function of controlling and outputting the predicted water level value. . Furthermore, (8) is the gate control device (7)
(9) is a gate drive device that drives the motor that opens and closes the gate using signals from the gate control device (7) (gate) wAI! A signal line (10) is a gate that transmits a signal to the t+ device (8). Note that (11) is a signal line that transmits a signal from the conversion device (3) to the water level estimation device (5).

In the water level control device configured as described above, the water level is measured in the same manner as a conventional water level measuring device, and the measured value is transmitted to the water level estimation device (5) through the signal cotton (6).
A water level estimation device (5) calculates a predicted value of the water level. The predicted value obtained in this way is transmitted to the gate control device (7) through the signal line (61), and the gate control device (7) calculates the gate control amount corresponding to the transmitted predicted water level value, and converts the gate control output signal into a signal. Through the line (9) the gate drive device (
8). The gate driving device (8) drives the gate opening/closing motor to open and close the gate, and to control the water level at a constant level.

Next, the calculation operation of the predicted water level value by the water level estimating device (5) will be explained based on FIG. 2 and FIG. 3 showing the contents of the water level estimating device (5). Let the water level value obtained by the converter (3) be [(0, H,, H2...H yo. I(., IT,, It, -, -, If, respectively, are times F* jl * Water level value of F-・t, which is stored in the memory section of the water level estimating device (5).The water level value 1[, (i=0.1.2...m) is the water level vibration or partial In order to prevent the influence of water level changes due to external disturbances such as water level fluctuations, the comparator shown in Figure 3 compares the previous value with H+ t(+ -r≦C (C is a constant and is set depending on the situation of the installation location). The gate circuit is opened and read into the memory and stored as data only when the conditions are met.If the conditions are not met, the previous value is adopted.Next, if the prediction start time is set to 1, The slope of the prediction curve between time tk-, is H* Hk-r/tktk-
Therefore, the water level ■1 at time 1k is I
Ik=(1(month-IL-+/1ktl-1) t* +
It is expressed as H*-□.

The above calculations are executed until time t1, the slope of the curve is determined, and time t is reached. Estimate the water level Hn at the time of .

Therefore, from the above calculation 1, t seen from time tk-1. The water level H,1 is H,l-g-tII+Hk-I(
g (the slope from time t to tIl obtained from the calculation result), and this is determined as the predicted water level value.

In the above embodiment, the measured values are transmitted through the signal line (6), but the same effect can be obtained even if the measured values are transmitted wirelessly.

〔Effect of the invention〕

As described above, the present invention has a simple structure in which a water level estimating device is provided that checks whether the measured values of the water level measuring device are within a certain range of change, accumulates them, and estimates the water level based on the measured values. , by avoiding the influence of disturbances such as partial water level vibrations or partial changes in the water level, and by setting the target value of gate control to the predicted value, the number of times of control can be reduced and the control can be optimized. This has the effect of allowing high water level control.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of a water level control device showing an embodiment of the present invention, FIG. 2 is a supplementary diagram explaining the calculation principle of the embodiment,
FIG. 3 is an explanatory diagram showing the contents of a water level estimating device, and FIG. 4 is an explanatory diagram showing a conventional water level control device. In the figure, (1) is the outer box of the water level measurement device, (2) is the float, (3) is the conversion device, (4) is the spring, (5) is the water level estimation device, (61, (91, (11) is the signal line, (7
) is a gate control device, and (8) is a gate drive device. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Claims] A water level measuring device consisting of a float, a spring that expands and contracts as the float moves up and down, and a conversion device that converts pressure changes caused by the expansion and contraction of this spring into water level values; a water level estimation device that calculates a predicted water level; a gate control device that controls opening and closing of the gate using the output of the water level estimation device; a drive device that drives a motor for opening and closing the gate based on the output of the gate control device; A water level control device consisting of: