Method for automatic adjustment of the filling level of a liquid stick pack

Abstract

The application discloses a kind of automatic adjustment methods of liquid strip package filling quantity, comprising the following steps: S1, deviation mean and judging state stability are obtained, and the actual mass of liquid strip package is weighed using weighing conveyor, and deviation mean and judging state stability are calculated according to the actual mass of liquid strip package;S2, adjustment weight is calculated according to deviation mean and state stability judging result;S3, adjustment amount of filling pump up and down movement operating parameter is calculated according to adjustment weight, and is applied to filling pump, to realize automatic adjustment filling quantity.Compared with prior art, the weight of liquid strip package can be obtained online by using the method of the application, the deviation and state stability are obtained by weight information conversion, and the adjustment amount of filling pump up and down movement operating parameter is obtained after the information is processed, which is applied to the filling pump to realize online real-time automatic adjustment of filling quantity.The intelligent degree of liquid strip package packaging production line is improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of liquid bag packing, and particularly relates to an automatic adjustment method for the filling amount of a liquid bag. BACKGROUND

[0002] When liquid bag packing is performed by using a bagging machine, the filling amount of liquid in each packing bag needs to be controlled.

[0003] When the filling amount needs to be adjusted, the existing bagging machine adopts a method of manually adjusting the parameters of the up-down movement of a filling pump.

[0004] The existing technology has the following deficiencies: the manual adjustment of the filling amount is prone to misoperation, and if there is an error in the setting, the filling accuracy is affected; and in the production process, the filling amount cannot be automatically adjusted in real time when the filling amount deviates, and the degree of intelligence is low. SUMMARY

[0005] (I) Technical problem to be solved

[0006] Therefore, the present application provides an automatic adjustment method for the filling amount of a liquid bag to solve the technical problems of the existing manual adjustment method for the filling amount of a bagging machine, which is prone to misoperation, has low accuracy, and has a low degree of intelligence.

[0007] (II) Technical scheme

[0008] To solve the above technical problems, the present application provides an automatic adjustment method for the filling amount of a liquid bag, which is applied to a bagging machine, and the bagging machine comprises a weighing conveyor and a filling pump; the automatic adjustment method for the filling amount of a liquid bag comprises the following steps:

[0009] S1, obtaining a deviation mean value and judging state stability, weighing the actual mass of a liquid bag by using the weighing conveyor, and calculating a deviation mean value and judging state stability according to the actual mass of the liquid bag;

[0010] S2, calculating an adjustment weight according to the deviation mean value and the judgment result of state stability;

[0011] S3, calculating the adjustment amount of the running parameters of the up-down movement of the filling pump according to the adjustment weight, and applying the adjustment amount to the filling pump to automatically adjust the filling amount.

[0012] Preferably, the method for obtaining the average deviation in step S1 is: detecting the actual mass of each liquid strip package passing through the weighing conveyor on line to obtain an actual single package deviation value, and writing the actual single package deviation value into the average deviation sample only when the actual single package deviation value is less than the allowed single package deviation value; increasing a feedback sample number corresponding to each actual single package deviation value added into the average deviation sample; and obtaining the average deviation by averaging all the actual single package deviation values in the average deviation sample when the cumulative feedback sample number is greater than a preset feedback sample number.

[0013] Preferably, the method for judging the state stability in step S1 is: continuously obtaining a preset sample number of actual single package deviation values, writing the actual single package deviation values into the stability sample, and judging the state stability; when all the actual single package deviation values are within the range of the allowed single package deviation value, the current state is determined to be a stable state; and when there is an actual single package deviation value outside the range of the allowed single package deviation value, the current state is determined to be an unstable state.

[0014] Preferably, the method for calculating the adjusted weight in step S2 is: B = AK1 in the stable state, where B is the adjusted weight, A is the average deviation, and K1 is a stable state adjustment ratio, 0 < K1 < 1; and B = AK2 in the unstable state, where K2 is an unstable state adjustment ratio, 0 < K2 < 1, and K2 > K1.

[0015] Preferably, the method for calculating the adjustment amount of the filling pump up-down movement operating parameter according to the adjusted weight in step S3 is: according to the adjusted weight, converting an adjusted volume in combination with the density of the substance in the liquid strip package, and obtaining the adjustment amount of the filling pump up-down movement operating parameter in combination with the cross-sectional area of the filling pump.

[0016] Preferably, in step S3, the adjusted volume = the adjusted weight / density of the substance in the liquid strip package; and the adjustment amount of the filling pump up-down movement operating parameter = the adjusted volume / cross-sectional area of the filling pump.

[0017] Preferably, the stability sample in step S1 includes the average deviation sample.

[0018] Preferably, K1 = 0.2-0.4, and K2 = 0.6-0.8.

[0019] Preferably, in step S1, the actual single package deviation value is obtained by subtracting the actual mass of the liquid strip package from the standard mass of the liquid strip package.

[0020] Preferably, the strip packaging machine is a single-column strip packaging machine or a multi-column strip packaging machine, and the sample selection is performed on the same column in the strip packaging machine when obtaining the average deviation and judging the state stability.

[0021] (Three) beneficial effects

[0022] Compared with the prior art, the automatic adjustment method of the liquid strip package filling amount has the following advantages:

[0023] Compared with the prior art, the method of the present application can obtain the weight of the liquid strip package online, convert the deviation and state stability through the weight information, and obtain the adjustment amount of the filling pump up and down movement operation parameter after processing the information, and apply the adjustment amount to the filling pump to realize online real-time automatic adjustment of the filling amount. The method of the present application avoids manual adjustment of the filling amount, thus avoiding misoperation and other problems, and can automatically adjust the filling amount in real time, improving the intelligent degree of the liquid strip package packaging production line. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creating laborious work.

[0025] Figure 1 The flowchart of the automatic adjustment method of the liquid strip package filling amount of the present application. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned purposes, features and advantages of the present application more apparent and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the drawings. In the following description, many specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the scope of the present application, so the present application is not limited to the specific implementation disclosed below.

[0027] The specific embodiments of the present application will be described below with reference to the drawings. Figure 1 The automatic adjustment method of the liquid strip package filling amount of the present application will be further described.

[0028] The present application discloses an automatic adjustment method of liquid strip package filling amount, applied to a strip packaging machine, the strip packaging machine comprising a weighing conveyor and a filling pump; the automatic adjustment method of the liquid strip package filling amount comprises the following steps:

[0029] S1, obtaining the deviation mean value and judging the state stability, using the weighing conveyor to weigh the actual mass of the liquid strip package, and calculating the deviation mean value and judging the state stability according to the actual mass of the liquid strip package.

[0030] S2, calculating the adjustment weight according to the deviation mean value and the state stability judgment result.

[0031] S3, calculating the adjustment amount of the filling pump up and down movement operation parameter according to the adjusted weight, and applying the adjustment amount to the filling pump to realize automatic adjustment of the filling amount.

[0032] In the embodiment, the two operation steps of obtaining the deviation mean and judging the state stability are not in sequence. The present application obtains the weight of multiple continuous liquid strip packages in real time, converts the weight information to obtain the deviation amount and the state stability, processes the information to obtain the adjustment amount of the filling pump up and down movement operation parameter, applies the adjustment amount to the filling pump to realize real-time automatic adjustment of the filling amount.

[0033] The method of the present application avoids manual setting of the adjustment amount, thereby avoiding the problems such as misoperation caused by manual setting, and can realize real-time automatic adjustment of the filling amount, thereby improving the intelligent degree of the liquid strip package packaging line.

[0034] According to the specific embodiment of the present application, the method for obtaining the deviation mean in step S1 is: obtaining the actual mass of each liquid strip package passing through the weighing conveyor in real time to obtain the actual single package deviation value, and writing the actual single package deviation value into the deviation mean calculation sample only when the actual single package deviation value is less than the single package allowable deviation value. When one actual single package deviation value is added to the deviation mean calculation sample, one feedback sample number is added correspondingly. When the cumulative feedback sample number is greater than the preset feedback collection number, the average of the actual single package deviation values in all deviation mean calculation samples is calculated to obtain the deviation mean.

[0035] In the embodiment, the abnormal liquid strip packages caused by unstable equipment are removed by screening the liquid strip packages detected in real time, that is, when the single package allowable deviation value is exceeded, the sample cannot be used to calculate the deviation mean. In this way, the influence of unstable equipment on the deviation mean is avoided, and the calculation accuracy of the deviation mean is ensured. When the deviation mean is calculated, the sum of the actual single package deviation values in all deviation mean calculation samples is divided by the number of the actual single package deviation values in all deviation mean calculation samples, and the deviation mean is obtained.

[0036] It should be noted that when the actual single package deviation value is greater than or equal to the single package allowable deviation value, the equipment normally displays the weight, and the actual single package deviation value is not written into the deviation mean calculation sample, and does not affect the feedback sample number.

[0037] According to the specific embodiment of the present application, the method for judging the state stability in step S1 is: writing the actual single package deviation values of a preset sample number into the stability calculation sample and judging, when all the actual single package deviation values are within the range of the single package allowable deviation value, the current state is determined to be a stable state, and when one actual single package deviation value is outside the range of the single package allowable deviation value, the current state is determined to be an unstable state.

[0038] More specifically, the method for calculating the adjustment weight in step S2 is: in a stable state, B=AK1, wherein B is the adjustment weight, A is the mean deviation, K1 is a stable state adjustment ratio, 0

[0039] More specifically, K1=0.2-0.4, K2=0.6-0.8. Preferably, K1=0.3, K2=0.7.

[0040] In the embodiment, the stable state refers to that when the weight is continuously stable within the stable range set value (single package allowable deviation value), the current state is determined as the stable state. The unstable state refers to that when the weight value exceeds the upper and lower limits of the unstable weight (one single package actual deviation value is outside the single package allowable deviation value range), the current column is determined as the unstable state.

[0041] It should be noted that in the present application, each time the liquid strip package filling amount is adjusted, the sample is selected from the same column of the strip packaging machine. In the calculation of the adjustment weight, a different proportion coefficient is respectively given according to whether the column is in a stable state or in an unstable state, and the adjustment proportion coefficient of the unstable state is larger than that of the stable state. In this way, the influence of stability on the adjustment amount is considered, and a relatively large adjustment weight can be calculated in the case of poor stability, and a relatively small adjustment weight can be calculated in the case of good stability. After adjusting the adjustment amount of the filling pump up and down movement operating parameter according to the adjustment weight, the actual mass of the liquid strip package can be more close to the standard mass of the liquid strip package.

[0042] According to the specific embodiment of the present application, the method for calculating the adjustment amount of the filling pump up and down movement operating parameter according to the adjustment weight in step S3 is: according to the adjustment weight, the adjustment volume is converted combined with the density of the substance in the liquid strip package, and then the adjustment amount of the filling pump up and down movement operating parameter is obtained combined with the cross-sectional area of the filling pump.

[0043] More specifically, in step S3: adjustment volume=adjustment weight / density of the substance in the liquid strip package; adjustment amount of the filling pump up and down movement operating parameter=adjustment volume / cross-sectional area of the filling pump.

[0044] In the embodiment, through the above algorithm, the filling volume is automatically adjusted through the physical relationship of weight, density and volume through the program, and the filling precision and the stability of the production line are improved.

[0045] According to the specific embodiment of the present application, the stability sample in step S1 includes the mean deviation sample.

[0046] In the embodiment, during implementation, the single-bag actual deviation values of the preset sample quantity are continuously acquired, written into the stability seeking sample and judged, and the data with the single-bag actual deviation value greater than the single-bag allowable deviation value is removed from the stability seeking sample as the deviation mean seeking sample. In this way, the data for judging stability and obtaining the deviation mean can be guaranteed to be data of the same period, and the accuracy of the algorithm is improved.

[0047] According to the embodiment of the present application, in step S1, the single-bag actual deviation value is obtained by subtracting the liquid strip actual mass from the liquid strip standard mass.

[0048] According to the embodiment of the present application, the strip packaging machine is a single-column strip packaging machine or a multi-column strip packaging machine, and during the deviation mean acquisition and the state stability judgment, the sample is selected for the same column in the strip packaging machine.

[0049] In the embodiment, during implementation, the single-bag actual deviation values of the preset sample quantity are continuously acquired, written into the stability seeking sample and judged, and the data with the single-bag actual deviation value greater than the single-bag allowable deviation value is removed from the stability seeking sample as the deviation mean seeking sample. In this way, the data for judging stability and obtaining the deviation mean can be guaranteed to be data of the same period, and the accuracy of the algorithm is improved.

[0050] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication inside two elements, or it can be "driven connection", that is, through various suitable ways such as belt drive, gear drive or chain wheel drive, power connection. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

Claims

1. An automatic adjustment method for the filling amount of liquid strip packages, applied to a strip package machine, the strip package machine comprising a weighing conveyor and a filling pump; characterized in that, The automatic adjustment method for the liquid strip filling amount includes the following steps: S1, obtain the mean deviation and determine the stability of the state, use the weighing conveyor to weigh the actual mass of the liquid strip, and calculate the mean deviation and determine the stability of the state based on the actual mass of the liquid strip; S2, calculate the adjustment weight based on the mean deviation and the state stability judgment result. The state stability includes a stable state and an unstable state. The method for calculating the adjustment weight is as follows: In a stable state, B = AK1, where B is the adjustment weight, A is the mean deviation, K1 is the stable state adjustment ratio, and 0 < K1 < 1; In an unstable state, B = AK2, where K2 is the unstable state adjustment ratio, and 0 < K2 < 1, and K2 > K1. S3, calculate the adjustment amount of the up-and-down movement operating parameters of the filling pump based on the adjusted weight, and apply it to the filling pump to realize automatic adjustment of the filling amount; The method for obtaining the mean deviation in step S1 is as follows: the actual mass of each liquid strip package passing through the weighing conveyor is detected online to obtain the actual deviation value of a single package. If and only if the actual deviation value of a single package is less than the allowable deviation value of a single package, the actual deviation value of the single package is written into the deviation mean calculation sample. For each additional actual deviation value of a single package in the deviation mean calculation sample, a corresponding feedback sample number is added. When the cumulative number of feedback samples is greater than the preset number of feedback collections, the average of the actual deviation values ​​of the single packages in all deviation mean calculation samples is calculated to obtain the mean deviation. The method for determining the stability of the state in step S1 is as follows: continuously obtain a preset number of single-package actual deviation values, write them into the stability calculation samples, and make a judgment. When all single-package actual deviation values ​​are within the range of the single-package allowable deviation value, the current state is considered to be a stable state. When there is a single-package actual deviation value outside the range of the single-package allowable deviation value, the current state is considered to be an unstable state.

2. The automatic adjustment method for the filling amount of liquid strips according to claim 1, characterized in that, The method for calculating the adjustment amount of the up-and-down movement parameters of the filling pump in step S3 based on the adjusted weight is as follows: based on the adjusted weight, combined with the density of the substance in the liquid strip, the adjusted volume is calculated, and then combined with the cross-sectional area of ​​the filling pump, the adjustment amount of the up-and-down movement parameters of the filling pump is obtained.

3. The automatic adjustment method for the filling amount of liquid strips according to claim 2, characterized in that, In step S3: Adjusted volume = Adjusted weight / Density of the substance in the liquid strip package; Adjustment amount of the up-and-down movement parameters of the filling pump = Adjusted volume / Cross-sectional area of ​​the filling pump.

4. The automatic adjustment method for the filling amount of liquid strips according to claim 3, characterized in that, The stability calculation sample in step S1 includes the deviation mean calculation sample.

5. The method for automatically adjusting the filling amount of liquid strips according to claim 4, characterized in that, K1 = 0.2-0.4, K2 = 0.6-0.

8.

6. The method for automatically adjusting the filling amount of liquid strips according to claim 5, characterized in that, In step S1, the difference between the actual mass of the liquid strip package and the standard mass of the liquid strip package is calculated to obtain the actual deviation value of a single package.

7. The method for automatically adjusting the filling amount of liquid strips according to claim 6, characterized in that, The strip packaging machine can be a single-column strip packaging machine or a multi-column strip packaging machine. When obtaining the average deviation and judging the stability of the state, the sample is selected from the same column of the strip packaging machine.

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