JPS6350273B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an automatic pouring device for automatically dispensing a predetermined amount of liquid, such as whiskey, into a container or bottle, such as a whiskey bottle.

[Prior art] A container is placed on a weighing scale, such as a load cell,
A technique for supplying a predetermined amount of liquid into a container while measuring it is known.

At that time, although the liquid is continuously supplied to the container, the injection is usually controlled by an on-off valve installed above the container, and even when the on-off valve is closed,
The amount of liquid falling between the on-off valve and the container is an error.

A quantitative correction device that uses a flow meter to correct the amount of liquid that drips after closing a valve is generally known, and is described, for example, in Japanese Patent Publication No. 18898/1983. In this known technique, the amount of dripping liquid is first counted, and the next time, that amount is subtracted and a valve closing signal is output. In this way, the measurement technique using a flowmeter always has a value of 1.
Since the flow rate per pulse is measured as correct,
In the case of a small amount of dripping, the number of pulses does not necessarily indicate the correct amount of liquid due to an error in the flow rate per pulse due to the instrumental error of the flowmeter, that is, the magnitude of the flow rate.

Furthermore, for example, Japanese Patent Application Laid-Open No. 84297/1984 discloses a technique in which a previously set setting value is corrected based on a measured shipment amount in order to ship a fixed amount of powder or fluid. However, this known technique does not require correction to the amount of liquid dripping, and is not suitable for determining a relatively accurate amount of liquid, such as in a whiskey bottle, for example.

[Object of the Invention] Therefore, the object of the present invention is to provide an automatic pouring system which is completely unaffected by instrumental errors and can always correctly correct the amount of liquid dripping, and which is particularly suitable for pouring liquid into, for example, a whiskey bottle. To provide liquid equipment.

[Structure of the Invention] According to the automatic liquid injection device according to the present invention, a weight scale on which a liquid container is placed, a liquid injection pipe connected to a liquid storage tank via a pump and having an on-off valve at its tip. ,
A liquid injection amount setting means for setting the liquid injection amount, a liquid injection start button, a storage means for storing the liquid injection amount set by the liquid injection amount setting means, a storage means for storing the tare weight of the container, and a weight A display meter that displays the value obtained by subtracting the tare from the weight signal of the scale, a storage means that stores the amount of dripping liquid that drips into the container after the on-off valve closes as a correction amount, and a weight signal from the scale is set. A valve control means that closes the on-off valve when the value obtained by adding the tare weight to the injected liquid amount and subtracting the memorized correction amount, and a value obtained by subtracting the memorized tare weight from the weight signal after a certain period of time after the on-off valve closes. and the set injection volume, and if the set injection volume is smaller, the difference is added to the stored correction amount, and if the set injection volume is larger, the difference is and a control means for subtracting the amount of the dripping liquid from the stored correction amount, and the correction amount of the dripping liquid amount is updated every time the liquid supply operation is performed.

[Description of the effects of the invention] Since the present invention directly measures weight, there is no instrumental error that causes a difference in the flow rate per pulse between high and low flow rates as with a flow meter, and the accuracy is always accurate. You can find the value. In particular, in the case of a flow meter, expansion and contraction occur due to temperature differences, but with a weight meter, there is no need for temperature correction. Since the entire amount of liquid injected is measured and injected until the set value is reached, the measurement work is accurate.

In addition, in the present invention, the amount of liquid dripping after a certain period of time is calculated, the difference between the final injection amount and the set amount is determined, and the next correction amount is corrected based on that difference. Even if the amount of dripping liquid changes after the valve is closed, the correct amount of liquid can be determined next time. Therefore, even if the viscosity of the liquid to be handled differs, the correction amount is corrected, so an accurate liquid amount can be determined.

[Principle of the Invention] The principle of the present invention can be explained using a mathematical formula as follows.

Now, if the set value is Q0, the liquid volume is a, and the final injection volume is Q1, the difference between the set volume and the final injection volume after a certain period of time after closing the on-off valve is Q0 - Q1. Let this be b.

The first valve closing signal is issued when Q0-a, but the next valve closing signal is issued when Q-(a+b). Since the amount of dripping liquid is constantly corrected in this way, the amount of injected liquid that is extremely close to the set value can be obtained.

That is, the weight signal when the valve is closed is [set amount + tare - correction amount], and the weight signal after a certain period of time after the valve is closed is [injection amount + tare].

[Examples] Examples of the present invention will be described below with reference to the drawings.

FIG. 1 shows an example of an automatic quantitative liquid injection device embodying the present invention, in which a base 1 has a liquid supply tank 2.
A control panel 3 and a weight scale 4 are provided. In the illustrated embodiment, whiskey is stored in a liquid supply tank 2, and a load cell is used as the weight scale 4. The liquid supply tank 2 is provided with a pump 6 driven by a motor 5, and the pump 6 is adapted to draw up liquid, that is, whiskey, from the liquid supply tank 2 and supply it to a 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 panel 3 includes 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 pump 11.
is provided. A container, ie, a whiskey bottle B, is placed on top of the weight scale 4, and a funnel 12 is inserted into its mouth.

The control panel 3 has a built-in circuit shown in FIG. 2, and the mode of operation of the present invention will be described below with reference to FIG.

Assuming that the bottle B is placed on the load cell 4 as shown in FIG. is converted into a digital weight signal, the weight signal is sent to the first arithmetic circuit 21, and 600g is displayed on the display meter 10. Here, the weight signal from the converter 20 is transmitted for a certain period of time, e.g.
It is assumed that it is output every minute of a second. That is,
The time required for converter 20 to convert the weight is approximately one-fourth of a second. Therefore, if you want to supply a certain amount Q, for example 300g of whiskey, to bottle B, press "3", "0", "0" on the numeric keypad 9. The signal from the numeric keypad, ie, the setting button 9, is sent to the memory circuit 22, where the designated amount, 300 g, is stored. The signal from this storage circuit 22 is sent to a second arithmetic circuit 23 and a third arithmetic circuit 24.
Now, in the second calculation circuit 23, as will be described later, when the on-off valve 8 was closed during the previous liquid injection operation,
The amount of water dripping from the opening/closing valve 8 onto the funnel 12, for example, 10 g, has already been calculated, and the signal is sent to the correction value storage circuit 25 and stored therein. Third
is the correction value from the set value in the arithmetic circuit 24 of
10g is subtracted, and the correction amount (300g -
10g=290g) is output to the comparison circuit 26.

Next, press the liquid injection button 11. Then, the tare, that is, the weight "600 g" of the bottle B binding funnel 12 is stored in the tare storage circuit 27, and the first arithmetic circuit 21
In this case, "total weight - tare = amount of liquid injected", that is, immediately before the start of liquid injection, "0 g" is calculated and the display meter 10 displays zero. At the same time, the valve motor control circuit 28 activation signal is input from the liquid injection button 11, the on-off valve 8 is opened, and the motor 5 is activated. Liquid, ie 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 total weight - tare weight every time the weight signal is transmitted from the converter 20 [1/4 second (250 msec)]. = liquid injection amount'' and outputs the weight of the liquid in bottle B. (Although the amount of liquid injected every quarter of a second actually changes slightly, it is assumed to be 8 g to make the explanation easier to understand.) This output signal is sent to the display meter 10 and the comparison circuit 26.
The comparison circuit 26 compares the value (290 g) calculated by the arithmetic circuit 24 with the amount of liquid injected, which is the output signal of the first arithmetic circuit 21 .

Now, in the comparison circuit 26, the signal from the first arithmetic circuit 21, that is, the weight signal of container B, and the signal obtained by subtracting the correction value from the third arithmetic circuit 24, that is, 290g, are compared, and both signals match. At times, the comparator circuit 26 sends an off signal, ie, a stop signal to the motor valve control circuit 28. the result,
The motor 5 is stopped and the on-off valve 8 is closed.

When an off signal is generated from the comparison circuit 26, the signal is sent to the timer circuit 29, and the timer circuit 29
sends a signal to the second arithmetic circuit 23 after the time required for the liquid to completely fall into the container B after the on-off valve 8 closes, for example, 2 seconds. Next, the second calculation circuit 23 calculates a correction value, that is, a value at which the liquid is poured into the container B after the on-off valve 8 is closed. That is, the signal of the final liquid injection amount after a certain period of time (2 seconds) after the on-off valve 8 closes is input from the first arithmetic circuit 21, and the set value is input from the other memory circuit 22. The arithmetic circuit 23 of No. 2 calculates (set value - injection amount = error). For example, if a signal of 302g is output from the first arithmetic circuit 21, a signal of 300g-302g=-2g is output. This error signal (-2g) is transmitted to the correction value storage circuit 25, and the correction value storage circuit 25 stores [(previous correction value + current error = next correction value) (10g-2
g=8g)] That is, 8g is stored in place of the previous correction value of 10g. Therefore, 8g is stored in the correction value storage circuit 25 and becomes the next correction value.

Therefore, for example, if you set 300g as the setting value for the next injection operation, 300g - 8g = 292
A valve close signal is sent from the comparator circuit 26 at the time of g.
In this way, the previously calculated amount is corrected in the next liquid injection operation. If the amount of liquid injected as a result of the next liquid injection operation is 299 g, the next correction value will be 9 g.

As described above, according to the present invention, when the on-off valve 8 is closed during the previous liquid injection operation, the amount of liquid that falls from the on-off valve 8 into the container B is used as a correction value, and the amount of liquid that is subtracted from the on-off valve 8 is calculated as a correction value. , so relatively correct injection work can be performed.

Referring now to FIG. 3, a preferred embodiment of the funnel 12 according to the present invention will be described.

The above explanation assumes that the same amount of liquid (for example, 300 g) is injected into all bottles B, but when the amount of liquid injected into bottles B is different, for example, in Fig. 3, when it is 50 g and 200 g. Since the distance from the on-off valve 8 to the liquid level is different,
Naturally, the correction values will also be different. Therefore, when carrying out the present invention, as shown in FIG. 3, a baffle plate 30 is provided at the lower end of the funnel 12.
0 is fixed to the main body 33 by a stay 31. An opening 32 through which liquid can fall is formed above the baffle plate 30.

Therefore, when pouring liquid, the liquid falling from the on-off valve 8 hits the baffle plate 30 of the funnel 12, so regardless of the amount of liquid poured into the bottle B, the amount of dripping after the valve is closed is constant. Therefore, the correction value can be kept substantially constant.

[Effects of the Invention] As described above, according to the present invention, when the on-off valve is closed during the previous liquid injection operation, the amount of liquid that falls from the on-off valve is measured, and this value is used as a correction value from the next set value. Since the amount is subtracted, it is possible to substantially perform the correct liquid injection operation.

[Brief explanation of the drawing]

FIG. 1 is a front view of a liquid injection device implementing the present invention;
FIG. 2 is a circuit diagram showing an example of a control circuit for implementing the present invention, and FIG. 3 is a sectional view of a funnel suitable for implementing the present invention. 4...Load cell, 5...Motor, 8...Opening/closing valve, 9
...numeric keypad, 10...display meter, 11...liquid injection button,
20...Analog-digital converter, 21...First
arithmetic circuit, 23... second arithmetic circuit, 24... third arithmetic circuit
25... Correction value storage circuit, 26... Storage circuit, 28... Valve, motor control circuit.

Claims (1)

[Claims] 1. A weighing scale on which a liquid container is placed, a liquid injection pipe connected to a liquid storage tank via a pump and having an on-off valve at its tip, a liquid injection amount setting means for setting the injection amount, A liquid start button, a storage means for storing the liquid injection volume set by the liquid injection volume setting means, a storage means for storing the tare weight of the container, and a display for displaying the value obtained by subtracting the tare from the weight signal of the weighing scale. a storage means that stores the amount of dripping liquid that drips into the container after the on-off valve closes as a correction amount, and a correction amount that is stored by adding the tare weight to the injection amount set by the weight signal from the weighing scale. The valve control means closes the on-off valve when the value obtained by subtracting the tare weight is compared with the value obtained by subtracting the stored tare weight from the weight signal after a certain period of time after the on-off valve closes, and the set liquid injection amount is set. control means that adds the difference to the stored correction amount when the set injection amount is smaller, and subtracts the difference from the stored correction amount when the set injection amount is larger. , an automatic liquid injection device characterized in that the corrected amount of dripping liquid is updated every time a liquid supply operation is performed.