JPH0442277B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a water supply amount control device that controls the amount of water supplied to a water storage tank.

[Conventional technology]

This type of conventional water supply amount control device will be explained with reference to the schematic structural diagram of FIG.

In the figure, 1 is a water storage tank, 2 is an electric valve that limits water supply, and 3 is a flow meter that detects the amount of water supply.

Next, the operation will be explained. Water is supplied to the water storage tank 1 by opening an electric valve 2, and the amount of water supplied is measured by a flow meter 3. Water supply is completed by closing the electric valve 3 when the required water supply amount is reached.

[Problem that the invention seeks to solve]

As described above, the conventional water supply amount control device uses the flow meter 3 to limit the amount of water supplied by the electric valve 2, so a highly accurate flow meter is required to accurately measure the amount of water supplied. There were problems such as the mechanism being complicated and expensive.

This invention was made to solve the above-mentioned problems, and by managing the amount of water supplied over time and correcting errors in the amount of water supplied using a position sensor, it is possible to accurately determine the amount of water supplied with a simple configuration. The purpose is to obtain a controllable water supply amount control device.

[Means for solving problems]

The water supply amount control device according to the present invention includes an electric valve for controlling water supply, a water supply amount setting means for setting the water supply amount, an arithmetic means for calculating the water supply time, a timer means for counting the water supply time, and an electric valve. The apparatus is provided with a control means for controlling the water storage tank, a position sensor attached to a predetermined position on the side surface of the water storage tank, and a water supply amount correction means for correcting the water supply amount based on the output of this position sensor.

[Effect]

The water supply amount control means in this invention calculates the water supply time by the calculation means based on the water supply amount set by the water supply amount setting means, and based on the result, the water supply amount is controlled by the electric valve control means while checking the time by the timer means. The valve is controlled so that the water supply amount correcting means corrects the water supply amount based on the output from the position sensor when the water supply amount reaches a desired water amount.

〔Example〕

Hereinafter, a water supply amount control device according to the present invention will be explained.

FIG. 1 is an overall configuration diagram of an embodiment according to the present invention, and numerals 1 and 2 are the same as the conventional device described above.

4 is a flow rate adjustment valve that adjusts the flow rate, 5a, 5b,
5c is a position sensor attached to a predetermined position on the side wall of the water storage tank 1; 6 is a water supply amount setting means for setting the water supply amount; and 7 is a calculation for calculating the water supply time based on the water supply amount set by the water supply amount setting means 6. 8 is a timer means for limiting the water supply time based on the calculation result of the calculation means 7; 9 is an electric valve control means for controlling the electric valve to open while the timer means 8 is in operation; 10 is the position sensor. This is a water supply amount correction means that instructs the calculation means 7 to correct the water supply amount based on the output signals from 5a, 5b, and 5c.

FIG. 2 is a circuit diagram showing the electrical connections of the embodiment of FIG. 1.

In the figure, 11 is a microcomputer in the control circuit, including a CPU 12, a memory 13, and a timer 1.
4, an input circuit 15, an output circuit 16, an analog multiplexer 17, and an A/D converter 18. 19 is an electric valve control circuit, which includes a resistor 20, a transistor 21, a relay RL, and a normally open contact RL of the relay RL.
formed from. The relay RL is connected via a transistor 21 between the positive terminal +V and the GND terminal, and the transistor 21 is connected to the output circuit 16 via a resistor 20. The normally open rl is connected in series to the electric valve 2 and the electrode 22.

23 is a resistor connected in series with the variable resistor 6' for setting the water supply amount, 24, 25, 26 are resistors connected in series with the position sensors 5a, 5b, 5c, and these detection signals are The signal is input to an analog multiplexer 17 in the computer 11.

Next, the operation of the above embodiment will be explained with reference to FIG.

Figure 3 shows memory 1 of microcomputer 11.
3 is an operation flowchart showing the water supply control stored in FIG.

First, at the same time as the start, water supply amount confirmation in step 27 shown in FIG. 3 starts. Here, the set water supply amount is assumed to be V(l). Next step 2
8, calculate the water supply time t. For water supply, flow rate adjustment valve 1
4 is fixed, but as the amount of water supplied increases, the water supply rate decreases.

If the water supply rate from the flow rate regulating valve 4 is υe (l/min) when there is no remaining water in the water storage tank 1, the water supply time t is calculated as t=V/υe (min). Next, in step 29, the electric valve 2 is opened, water supply is started, and at the same time a water supply timer is started.

As described above, as the water supply rate υe changes as the water supply amount to the water storage tank 1 increases, the water supply amount is then corrected at an arbitrary water supply amount.

That is, the position sensors 5a, 5b, and 5c attached to predetermined positions on the side wall surface of the water storage tank 1 perform correction at the position of the arbitrary water supply amount to improve the accuracy of the water supply amount. Here, full water is assumed to be 300, and 100, 200
An example of correction at the position will be explained.

The amount of water supplied is expressed as V _q = υe × t _q (l), where t _q (min) is the time elapsed since water supply started.

Next, in step 30, it is determined whether _Vq is greater than or equal to 300 or less than 300, based on the detection signal of the position sensor 5a. If it is less than 300, step 31 is executed; if it is 300 or more, step 42 is executed.

In step 31, it is determined whether the water supply amount has already reached 200 or more, and if it has reached it, then step 41 is executed, and if it has not reached it,
Execute step 32. This is a judgment of water supply amount of 200.

Whether the water supply amount has reached the position 200 of the position sensor 5b is detected based on the output signal of the position sensor 5b. If you have reached 200, step 3
In step 6, the water supply amount is corrected, and the water supply amount V _q =200.

If it is less than 200 in step 32, then in step 33 it is determined whether the water supply amount has already reached 100. If it has reached 100, then step 41 is executed, and if it has not reached it, step 41 is executed. Execute 34. This is a judgment of water supply amount of 100.

Whether the water supply amount has reached the position 100 of the position sensor 5c is detected by the output signal of the position sensor 5c. If the number has not reached 100, then step 41 is executed. If it reaches 100,
Next, in step 35, correction of the water supply amount begins, and V _q
=100.

Next, in step 37, the water supply amount determined in step 35 or 36 is subtracted from the set water supply amount V() confirmed in step 27, and the water supply amount is reset.

That is, VQ=V- _Vq .

Next, in step 38, the water supply time t' is set to reset the water supply time t calculated in step 28.
Calculate by t′=VQ#/υe.

Next, in step 40, the water supply timer is restarted. Next, in step 41, it is determined whether the water supply timer has reached the water supply time t', and if it has not reached the water supply time t', then step 30 is executed, and if it has reached it, the water supply is stopped in step 42. Control ends.

〔Effect of the invention〕

As described above, according to the present invention, the amount of water supplied is controlled by an electric valve and the amount of water supplied is managed by time, and errors in the amount of water supplied are detected and corrected by a position sensor attached to a predetermined position on the side wall of the tank. Therefore, the amount of water to be supplied can be obtained with high precision, and it can be provided at low cost with a simple device.

[Brief explanation of drawings]

Fig. 1 is an overall configuration diagram showing an embodiment of the present invention, Fig. 2 is a main electric circuit diagram, Fig. 3 is a flowchart showing the operation, and Fig. 4 is a schematic configuration showing a conventional water supply amount control device. It is a diagram. In the figure, 1 is a water storage tank, 2 is an electric valve, and 5
Reference numerals a, 5b, and 5c are position sensors, 6 is a water supply amount setting means, 7 is a calculation means, 8 is a timer means, 9 is an electric valve control means, and 10 is a water supply amount correction means. still,
The same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Claims] 1. An electric valve for controlling the water supply, a water supply amount setting means for setting the water supply amount, a calculation means for calculating the water supply time based on the water supply amount set by the water supply amount setting means, and a water supply amount calculated by the calculation means. a timer means for counting water supply time; an electric valve control means for controlling the electric valve to open while the timer means is in operation; and a position sensor attached to a predetermined position on a side surface of a water storage tank for storing water supply; After water supply starts, the actual amount of water supplied to the water storage tank is detected based on the output of each position sensor, the amount of water supplied from the start of water supply is corrected based on the detection signal, and this is output to the calculation means to determine the water supply time. A water supply amount control device comprising: water supply amount correction means for instructing recalculation of the water supply amount.