KR101306637B1 - Measuring apparatus and method the same - Google Patents

Abstract

The present invention relates to an automatic weighing apparatus and a method, wherein each element data according to a target weight, a measuring speed, and a tolerance, i.e., the strength of vibration, the time of vibration, the stop position of the loan feeder and the ejection feeder, and the brake position Provides an automatic weighing device and method that can control the metering and metering speed by storing the data about the metering operation based on the initially stored element data and then updating the element data according to the operation data. The purpose is.

Description

Automatic weighing apparatus and method {Measuring apparatus and method the same}

The present invention relates to an automatic weighing apparatus and method, and more particularly, to an automatic weighing apparatus and method for automatically and accurately metering and quantitatively discharging raw materials conveyed by vibration.

In order to subdivide raw materials such as grains and powders in an accurate amount, an automatic weighing apparatus as shown in FIG. 1 is used. FIG. 1 (a) is a front view and FIG. 1 (b) is a side view.

The automatic metering device is provided with a hopper 110 on the upper portion of the frame 100, a certain amount of raw material is discharged through the feed feeder 120 according to the opening degree of the shutter 111 from the hopper 110 ( 130 and the loan feeder 140 is supplied.

The ejection feeder 130 transfers a small amount of raw material, and the loan feeder 140 transfers a large amount of raw material, while the feed feeder 120 vibrates by the feed feeder vibration unit 121 of a cylindrical shape. The raw material is simultaneously supplied to the dissipation feeder 130 and the loan feeder 140, and the dissipation feeder 130 transfers the raw materials little by little to the weighing bucket 150 by the small vibration of the dissipation feeder vibration unit 131, and the loan feeder. 140 is a large vibration of the loan feeder vibration unit 141 is to transfer a large amount of raw material toward the metering bucket 150.

Therefore, when a certain amount of raw material is input to the weighing bucket 150, and the weight detected by the load cell 151 reaches the target weight, the weighing bucket driver 160 opens the weighing bucket 150 to discharge the raw material. Discharge to the work table 180 through the).

Therefore, the raw material is put into the packaging material placed on the work table 180 to quantitatively measure.

The weighing process for discharging quantitatively by vibrating control of the ejection feeder 130 and the loan feeder 140 is shown in FIG. 2.

2 (a) is a control graph of the loan feeder 140, and FIG. 2 (b) is a control graph of the ejection feeder 130, for example, with a target weight of 1000 g.

Initially, the amplitude of loan loaner 140 starts at 90% and continues until 300g is weighed, and gradually decreases the amplitude in the interval of 300g to 500g to have 60% amplitude, and then loan loaner 140 at 500g. When the brake is applied to 900g, the amplitude reaches 40%, and then the loan feeder 140 is stopped so that a large amount of raw materials are quickly transferred to the weighing bucket 150.

At the same time, the dissipation feeder 130 starts at 80% of the amplitude and continues until 300g is weighed, and gradually reduces the amplitude in the interval of 300g to 500g to have 70% amplitude, and then dissipates the feeder 130 at 500g. When the brake is applied to 1000g, the amplitude reaches 30%, and then the ejection feeder 130 is stopped so that the raw material is precisely transferred to the weighing bucket 150 to approach the target weight.

In order to quantitatively measure the raw materials by this process, the most important factors are the opening degree of the shutter 111, the vibration intensity, the vibration time, the stop time difference between the loan feeder 140 and the ejection feeder 130, and the position at which the brake is performed. do.

However, in the related art, the user inputs and sets these elements directly, which is very cumbersome and causes a large amount of weighing error when the setting is not made correctly.

That is, there is a hassle to set the vibration strength, the vibration time, the stop time difference between the loan feeder and the ejection feeder, and the break point.

In addition, when the characteristics of raw materials change, that is, the characteristics of grains such as grains and flours such as wheat flour are very different from each other, it is very difficult for a user to judge the characteristics and input a set value, which also causes a measurement error. Becomes

In addition, when a change in the vibration force occurs due to a change in power supply, this also causes a measurement error, and there is a problem that a measurement error is inevitably caused by many internal and external factors.

Finally, there is a problem that it is difficult to predict the productivity because the weighing value and the weighing time are changed by various factors described above.

Therefore, in order to solve the conventional problems, the present invention relates to each element data according to the target weight, the measuring speed, and the tolerance, that is, the strength of the vibration, the time of the vibration, the stop of the loan feeder and the discharge feeder, and the position at which the brake is performed. Provides an automatic weighing device and method that can control the metering and metering speed by storing the data about the metering operation based on the initially stored element data and then updating the element data according to the operation data. The purpose is.

Automatic weighing apparatus of the present invention for achieving the above object,

In the automatic weighing device, the raw material discharged from the hopper by the feed feeder and shutter opening degree is transferred to the weighing bucket and weighed by the draining feeder and the loan feeder.

An input unit for inputting a weighing target weight value and a tolerance value of a raw material and a weighing frequency per unit time from a user;

A set value storage unit that stores and stores the initial strength of the feeder's vibration strength, the brake strength and the brake position, and the stop position according to the target weight value and the tolerance value, and the number of weighings per unit time. ;

A processor for controlling the dispensing feeder and the loaning feeder based on the initial operation data stored in the set value storage unit, and updating the initial operation data according to the accumulated tolerance value and the number of times of measurement per unit time;

A load cell which provides the processor with a weight value transferred to the weighing bucket;

And a timer for providing information on the metering time to the processor.

According to the present invention, when the user inputs only the weighing target weight value and the tolerance value of the raw material, and the number of weighings per unit time, automatic weighing is performed, so that the user does not have to input a lot of element data as in the prior art, and the setting is very simple. Become.

In addition, even if the user does not know the characteristics of the raw material automatically performs a quantitative weighing and the desired number of times of measurement to increase productivity.

Even if external or internal factors occur, there is an effect that the quantitative weighing is automatically performed in response to the adaptive.

1 is a view showing the structure of a general automatic weighing apparatus.
Figure 2 is a graph showing the raw material transfer state by the metering device of FIG.
Figure 3 is a control block diagram of the automatic weighing apparatus applied in the present invention.

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

First, as an important control element for quantitatively conveying the raw material to the weighing bucket 150 at a desired speed as shown in FIG. 1, the opening degree of the shutter 111, the intensity of vibration of the feed feeder 121, the ejection feeder ( The brake is applied to the ejection feeder 130 and the loan feeder 140 according to the strength and time of the vibration of the 130 and the loan feeder 140, the stop time difference between the ejection feeder 130 and the loan feeder 140, and the transfer amount of the raw materials. It's time to start working.

An initial set value according to the control element is stored in advance in the set value storage unit 220. As an example, the target weight of the raw material is 1000 g, the number of weighings per minute is 10, and the tolerance of the target weight is ± 3 g. If so, the initial setting values as shown in the following table 1 are stored in a table form, and various initial setting values according to the target weight, the number of weighings per minute, and the tolerance are stored.

One Target weight 1000 g 2 Weighing Per Minute 10 times 3 Tolerance ± 3 g 4 Loan Fender Stop Position 880 g 5 Loan Feeder Brake Position 650g 6 Vibration Strength of Feeder 90% 7 Shutter opening 80% 8 Primary Vibration Strength of Loan Feeder 90% 9 Second vibration strength of loan feeder 60% 10 Third vibration strength of loan feeder 40% 11 Primary Vibration Intensity 80% 12 Primary Vibration Intensity 70% 13 Primary Vibration Intensity 30%

Here, the first vibration intensity section of the loan feeder and ejection feeder is a section for maintaining the initial vibration intensity, as shown in Figure 2, the second vibration intensity section is a vibration reduction section to the brake position after the first vibration is completed, 3 The differential vibration intensity section is a vibration reduction section from the brake position to the stop position.

Therefore, when the user sets the target weight, the number of counts per minute, and the tolerance through the input unit 210, the processor 200 reads the setting value for the input value from the setting value storage unit 220 and performs automatic weighing operation. The processor 200 opens the shutter 111 by the initial setting value stored in the setting value storage unit 220 as shown in Table 1, and then controls the supply feeder vibration unit 121 to supply the supply feeder 120. By vibrating the raw material discharged from the hopper 110 is supplied to the discharging feeder 130 and the loan feeder 140.

Thereafter, the ejection feeder 130 and the loan feeder 140 also control the initial setting values stored in the setting value storage unit 220 to transfer the raw materials to the weighing bucket 150, and the processor 200 load cell. When the weight measured by 151 becomes the target weight, the weighing bucket driving unit 160 is controlled to discharge the weighed raw material.

At the same time, the initial primary weighed time is input from the timer 230 to temporarily store the measured weight data and time in the set value storage unit 220.

This weighing process is repeated a predetermined number of times (for example, three times), and the average value is calculated after accumulating the weighing error data and the weighing count data per unit time.

For example, if three weighing values are 1002.7g, 996.5g and 1001.2g, and the speeds are 5.7 seconds, 5.8 seconds and 5.8 seconds respectively, the cumulative weighing average value is 1000.13g and the cumulative weighing average speed is 5.76 seconds and 6 seconds. Since the metering is set within 10 minutes per minute, once weighing should be within 6 seconds, the processor 200 performs the metering operation with the initial setting value stored in the setting value storage unit 220.

On the other hand, if the cumulative weighing average value exceeds or falls below the tolerance and the cumulative weighing average speed exceeds 6 seconds, the processor 200 may vibrate the vibration of the loan feeder 140, the vibration strength of the ejection feeder 130, and the loan. By controlling the brake position of the feeder 140, the stop position of the loan feeder 140, the opening degree of the shutter 111, and the vibration intensity of the supply feeder 120, the cumulative weighing average value and the cumulative weighing average speed are within the target range. To listen.

To this end, if the cumulative weighing average value is out of tolerance or the cumulative weighing average speed does not fall within the target time, the processor 200 determines the amplitude of the supply feeder, the amplitude of the loan feeder, the amplitude of the ejection feeder, the stop position of the loan feeder, and the like. The setting value for the brake position of the loan feeder is corrected by increasing the setting value by a predetermined size (for example, 2% of the amplitude) step by step, and the weighing operation is performed at the corrected value at every corrected step. The weighing operation is repeated a predetermined number of times (three times) with the corrected value at that time.

When the cumulative weighing average value and the cumulative weighing average speed are within the initially set target ranges by the repetitive weighing operation, the set value of the set value storage unit 220 is updated to the corrected set value, and the updated set value is updated. The metering operation is performed.

On the contrary, if the cumulative weighing average value exceeds the tolerance, the processor 200 sets a predetermined value for the amplitude of the feed feeder, the amplitude of the loan feeder, the amplitude of the ejection feeder, the stop position of the loan feeder and the brake position of the loan feeder. (E.g., 2% of amplitude), decrease by step and correct it, and perform weighing operation with the corrected value at every corrected step, and then perform weighing operation with the corrected value at that time when it reaches the set target range (3 Repeat)

In addition, when the cumulative weighing average value and the cumulative weighing average speed are within the initially set target range by repetitive weighing operation, the set value of the set value storage unit 220 is updated to the corrected set value, and the updated set value is updated. The metering operation is performed.

The processor 200 continuously monitors the cumulative weighing average value and the cumulative weighing average speed, and if it is out of the error range, repeats the above process to enter the error range.

As a result, even if external factors such as the type of raw material and the power supply change, the metering operation is performed to follow the value initially set by the user based on the corrected data.

100: frame 110: hopper
111: shutter 120: feed feeder
121: supply feeder vibration unit 130: ejection feeder
131: ejection feeder vibration unit 140: loan feeder
141: loan feeder vibration unit 150: weighing bucket
151: load cell 160: weighing bucket drive unit
170: discharge chute 180: work table
200: processor 210: input unit
220: setting value storage unit 230: timer

Claims (4)

In the automatic weighing device, the raw material discharged from the hopper by the feed feeder and shutter opening degree is transferred to the weighing bucket and weighed by the draining feeder and the loan feeder.
An input unit for inputting a weighing target weight value and a tolerance value of a raw material and a weighing frequency per unit time from a user;
A set value storage unit that stores and stores the initial strength of the feeder's vibration strength, the brake strength and the brake position, and the stop position according to the target weight value and the tolerance value, and the number of weighings per unit time. ;
A processor for controlling the dispensing feeder and the loaning feeder based on the initial operation data stored in the set value storage unit, and updating the initial operation data according to the accumulated tolerance value and the number of times of measurement per unit time;
A load cell which provides the processor with a weight value transferred to the weighing bucket;
And a timer for providing information on the weighing time to the processor.
According to claim 1, wherein the processor according to the accumulated tolerance value and the number of times of measurement per unit time, the amplitude of the supply feeder, the amplitude of the loan feeder, the amplitude of the ejection feeder, the stop position of the loan feeder and the loan feeder set in the set value storage unit An automatic weighing device, configured to incrementally increase or decrease a set value for a brake position of the control unit and store the corrected set value in a set value storage unit to update initial operation data.
The vibration strength of the feeder, the vibration strength of the feeder and the loaner, and the brake position, which are stored in the set value storage unit according to the weighing target weight and tolerance value of the raw material input from the user, and the number of weighings per unit time A first step of selecting initial operation data for the stop position and controlling the ejection feeder and the loan feeder to perform weighing;
The processor accumulates the measurement count data and the measurement error data per unit time generated by performing the measurement of the first process a predetermined number of times, and if the accumulated average value is out of the error range, the amplitude of the supply feeder, the amplitude of the loan feeder, and the output feeder The amplitude, the stop position of the loan feeder, and the brake position of the loan feeder are increased or decreased to control the number of times of measurement data and the measurement error data per unit time within the error range, and the increased or decreased set value is stored in the setting value storage unit. A second process of updating;
And a third step of repeating the second step from the second step based on the set value updated by the second step.
4. The method of claim 3, wherein the updating of the setting value stored in the setting value storing unit in the second process is performed by incrementally increasing or decreasing the initially stored setting value, and operating at the corrected setting value for each step to determine the weighing count data per unit time. If the weighing error data is within the error range, repeat the operation a predetermined number of times with the corrected set value at that time, and if the counting count data and the weighing error data per unit time are within the error range even after the repeated operation with the corrected setting value, Automatic weighing method characterized in that configured to update the set value of the value storage.

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