JPS5864996A - Method of automatically supplying liquid - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic liquid dispensing method for automatically dispensing a predetermined amount of liquid, such as whiskey, into a container or bottle, such as a whiskey bottle.

A method is known in which a container is placed on the soil of a weight scale, such as a load cell, and a predetermined amount of liquid is supplied into the container while being weighed.

At that time, although the liquid is continuously supplied to the container,
The signal from the weighing scale is emitted at regular intervals (e.g., one-fourth of a second) to convert an analog signal into a digital signal, and therefore the liquid dispensed during that time interval will have an error and will not match the given amount. This results in a fraction. In order to reduce this error, it is possible to reduce the amount of clouding of the supply liquid per unit time, or to shorten the measurement time. However, in the former case, it takes time to supply the liquid, and in the latter case, even if it is possible in theory, it becomes costly and is not suitable in practice.

Furthermore, liquid supply is usually controlled by an on-off valve provided above the container, but even if the on-off valve is closed, the amount of liquid falling between the on-off valve and the container will still result in an error.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an automatic liquid supply method that allows accurate measurement even if the measurement time of the weighing scale is long, and that can also correct the amount of liquid that falls from the hs when the on-off valve is closed.

According to the present invention, the difference between the time measured by the weight needle and the measured time is divided into a plurality of times, and the time to close the on-off valve is calculated based on the instantaneous discharge bottle at that time, thereby achieving an accurate predetermined value. Even if the on-off valve is closed and the amount of liquid from the on-off valve to the container is corrected, X will occur.

The present invention will be described in detail below with reference to the drawings.

FIG. 1 shows an example of an automatic liquid supply device for carrying out the invention, and the base includes a liquid supply tank 2 and a control unit 0113.
In the illustrated embodiment, whiskey is stored in the liquid supply tank 2, and a load cell is used as the weighing scale 4. A pump 6 driven by a Gt motor 5 is provided in the liquid supply tank 2, and this pump 6 pumps liquid, that is, whiskey, from the liquid supply tank 2 and supplies it to the liquid supply pipe 7.

This liquid supply pipe 7 extends above the weight scale 4, and an on-off valve 8 is attached to its tip. The control 113N is provided with a numeric keypad 9 for setting the amount of liquid to be supplied, a display meter 10 for displaying the amount of liquid to be supplied, and a liquid injection button 11. lil total 4
A container, that is, a whiskey bottle B is placed on top of the
A funnel 12 is inserted into its mouth.

This control panel 3 has a built-in circuit shown in FIG.
Embodiments of the present invention will be described below with reference to FIGS. 2 and 3.

Assuming that the bottle B is placed on the load cell 4 as shown in Figure 1, the load cell 4 outputs an analog signal corresponding to its II old weight, for example, 600 g, and the output is converted to 600 g by the analog-to-digital converter 20.
is converted into a digital weight signal, the weight signal is sent to the first arithmetic circuit 21, and 600 g is displayed on the display meter 10. Here, the III signal from the converter 20 is constant! I
It is assumed that l@e is output every quarter second. That is, the time required for the vertical conversion by the converter 20 is approximately 1/4 second. Therefore, if you want to supply electric (e.g. 3001) whiskey to bottle B, press numeric keypad 9 to r3.
Press J, rOJ, "0". A signal from the numeric keypad or setting button 9 is sent to the second calculation circuit 22 for correction, and at the same time a correction signal is sent from the correction value storage circuit 23.

This correction value storage circuit 23 stores the falling liquid cloud from the on-off valve 8 to the funnel 12, and for the sake of clarity of explanation, it is assumed that the value is 109. Therefore, the second calculation circuit 22 for correction calculates [setting value - correction value = setting amount], and calculates ``290 (IJ to the setting circuit 24
[2Hgj is set here.

Next, press the liquid injection button 11. Then, the tare memory circuit 25 stores the weight of the tare, that is, the weight of the bottle B container 12 [600 g
J is memorized, and the arithmetic circuit 21 calculates "total weight - tare and liquid volume", that is, "00", and the display meter 10 displays zero. Further, when the liquid injection button 11 is pressed, an activation signal is input to the valve motor control circuit 30, the on-off valve 8 is opened, and the motor 5 is activated. The liquid, ie the whiskey, is therefore supplied to bottle B.

Since the weight signal from the converter 20 is transmitted every 1/4 second, the first arithmetic circuit 21 calculates the weight signal from the converter 20 every 1/4 second (250m5eC1).
] is calculated as [total weight - one tare filled liquid -], and the liquid weight in bottle B is output. (The amount of fluid supplied every quarter of a second actually changes slightly, but to make the explanation easier to understand, it is 8g.
shall be. ) This output signal is sent to the display meter 10 and the third one for subtraction.
and a fourth arithmetic circuit 27 for instantaneous ejection setting. The third arithmetic circuit 26 converts the value (290g) set by the setting circuit 24 into the first arithmetic circuit 2.
The amount of liquid injected, which is the output signal of 1, is subtracted. That is, "set amount - injection amount = remaining injection liquid -" is output. The fourth arithmetic circuit 27 calculates the instantaneous discharge ff1r8÷1o=o,rg every fraction of the time interval at which the output signal from the converter 20 is generated, for example, every tenth or one-fortieth second. .

That is, 0.8 g is injected for each count.

Assume that after a certain period of time has elapsed after performing the liquid injection operation in this manner, the current amount of liquid injection is 180 g. At that time, as described above, the third arithmetic circuit 26 outputs r290-180=
A signal indicating ll0J is sent to the fifth operator circuit 28 for division and to the counter 29 for subtraction. This fifth
The arithmetic circuit 28 calculates the residual value from the third arithmetic circuit 26.
a11i! l is divided by the time discharge value of the fourth arithmetic circuit 27.

In other words, [110÷o, s= 137.5J is calculated.

Then, the fifth arithmetic circuit 28 sends 11r'138J, which is obtained by rounding up the value of F, to the counter 29 as a counter set signal, and sets the value r138J. The counter 29 is a circuit that subtracts a set value by 1 every 1/140 second of the measurement time of the instantaneous discharge amount, and when the value reaches zero, the valve motor control circuit 30 is instructed to close the valve and start the motor. It outputs a stop signal. counter 29
The value j 138J set for
'' is subtracted, and when it becomes ``128'' after 1/4 second, new weight data is issued by the converter 20, and a new value is output from the arithmetic circuit 28 to the counter 29, and the value is reset. . This operation is repeated one after another.

In FIG. 3, the vertical axis shows the amount of liquid injected, and the horizontal axis shows time. If a constant injection of 8 g is continued every quarter of a second, then at current time t2, Q2 = 16Q, and at time tn-i, Qn -1 = 2809r, then at time in, Qn -288g, and the injection work can still be continued. Then, at time 1, when a signal indicating that Qn-288g is issued from the first arithmetic circuit 21, the third arithmetic circuit 26 outputs [290-288=
2 When the haiku name J appears, the fifth arithmetic circuit 28 calculates [2÷0.
8-2.5J will be recorded. Then, the fifth arithmetic circuit 28 outputs and sets "3" to the counter 29, and the counter 29 subtracts "1" every 1/40 second. When the set value of the counter 29 becomes "0", a close signal is sent to the valve motor control circuit 30, the on-off valve 8 closes and the motor 5 stops, and when the liquid drips from the valve 8, the weight is set. The value becomes Q, and the liquid supply operation ends. The difference between the weight when the on-off valve 8 closes and the final weight is the weight of the dripping liquid, that is, the value stored in the correction value storage circuit 23, and this value is, for example, the previous value or the average of several times. It is only necessary to correct the value and store it in the circuit 23.

As described above, according to the present invention, the instantaneous discharge of the supplied liquid (i.e., the discharge amount at fixed time intervals) is measured, and the liquid supply is stopped at the set level based on the instantaneous discharge amount. Accurate values can be obtained even if the time interval between transmitting weight signals is long. Furthermore, even if the instantaneous discharge amount changes, the calculation is performed in accordance with that value, so there is little error. Furthermore, since the amount of liquid injected into the container from the on-off valve is corrected in advance when the on-off valve closes, highly accurate liquid supply is possible.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an automatic liquid supply device implementing the present invention;
FIG. 2 is a block diagram showing a control circuit implementing the present invention;
FIG. 3 is a graph showing the correspondence of liquid supply to implement the present invention. 4...Load cell 5...Motor
8...Open/close valve 9...Numeric keypad
10... Display meter 11... Liquid injection button 20... Analog-digital converter
21...First arithmetic circuit 22...
・Second calculation circuit 23... Correction value storage circuit 24... Setting circuit 25... Tare storage circuit 26... 9- Third calculation circuit 27...Fourth arithmetic circuit
28...Fifth arithmetic circuit 29...
・Counter 30...Valve, motor control circuit 10-

Claims (2)

[Claims] (1) In an automatic liquid supply method in which a set amount of liquid is supplied to a container while measuring the container and the heavy chain of the liquid to be supplied using a weighing scale that outputs a measured weight signal at a fixed time ti@, the output signal from the weighing scale is Calculate the instantaneous amount of fluid supplied, calculate the time for the set amount to be supplied based on the instantaneous amount of fluid supplied, and close the on-off valve at the calculated time to measure the weight using the weighing scale. An automatic liquid supply method characterized in that liquid supply is stopped at intervals finer than the output interval of the signal. (2) The automatic liquid supply method according to claim 1, wherein the amount of liquid supply that will fall when the on-off valve is closed is determined in advance, and the amount of liquid supply that will fall is subtracted from the set amount.