Intelligent Quantitative Packaging Scale

0 overview

In recent years, with the rapid development of packaging industry, quantitative packaging scale is widely used in grain, oil, feed and other industries.Due to the site of each batch of material characteristics (temperature, humidity, particle size and fluidity, etc.) have some changes, affecting the packaging of many factors, so that the quantitative packaging scale packaging speed can only according to the most adverse environmental conditions, the slower speed of packaging.If the instrument parameters are set according to the current material characteristics to achieve the optimal packaging speed, it can only be applicable to the current material characteristics. After a period of time, the material characteristics and environment change, the actual packaging weight will be out of range or the packaging speed will slow down, affecting the production.One way to solve this problem is that the operator constantly adjusts the instrument parameters according to the change of material characteristics in order to maintain a high packing speed.Because the on-site packing personnel are mostly dispatched workers or temporary workers, the mobility is large, and it is not suitable for constantly operating and controlling the instrument to adjust the parameters.The following is a solution to the problem of improving the packaging speed under the premise of ensuring the packaging accuracy, that is, an intelligent quantitative packaging scale, through the quantitative packaging scale self-learning, self-adaptive way to automatically correct the impact of material characteristics and environmental changes, to achieve the best working state.

2. Intelligent quantitative packaging scale scheme

At present, the mechanical part of quantitative packaging scale generally adopts the way of double bucket weighing alternately to meet the requirements of fast packaging speed. As long as the design structure is reasonable, the influence of mechanical part on packaging speed is not great.The influence of control instrument on packaging speed is relatively large, not the control problem of the instrument itself, but the external environment and material characteristics change instrument can not be caused by intelligent judgment.The following is a brief talk about the personal understanding of the intelligent quantitative packaging scale control instrument control.

The intelligent quantitative packing scale control instrument has introduced the function of self-learning and self-adaptation, so as to adapt to the change of material characteristics and environment.The intelligent quantitative packaging scale control instrument (hereinafter referred to as the "instrument") has two modes: safety mode and intelligent acceleration mode. It can realize the corresponding function by two keys or realize the corresponding function alternately by one key.In the safe mode, the meter is quantitatively controlled according to the most adverse conditions of fast feed advance and slow feed advance.Fast feed advance, slow feed advance set value is larger, the packaging speed is slower, to ensure that the quantitative packaging scale can also guarantee the packaging precision in the most unfavorable circumstances.Although this conservative way ensures the packaging precision, it ignores the packaging speed, that is, the packaging efficiency is low, which is an urgent problem to be solved in enterprises that pay attention to production efficiency.Intelligent acceleration mode is that the instrument can automatically adjust the set value of fast feed and slow feed according to the intelligent control algorithm to achieve the purpose of accurate quantitative and fast packaging.In the intelligent acceleration mode, the first packaging of each weighing hopper (according to the double-bucket quantitative packaging scale for example) instrument works according to the parameters in the safety mode, the instrument records the fast feeding advance amount of each package, the meter value at the end of the fast feeding (the fast feeding door is completely closed, the meter value after the material impact,(the same below), slow feeding advance, weighing final value and the time in the corresponding state (including the time to start feeding) and other parameters.Instrument according to the intelligent control algorithm and the parameters recorded above automatically calculate the current material optimization (relative to the last) fast feed advance, slow feed advance (a certain safety factor, safety factor can be set in the instrument), the next package will be based on the parameters optimized by the instrument for quantitative control.And record the package fast feeding schedule, fast feed at the end of the said value, slow feeding schedule, weighing value of time and the corresponding conditions (including the feeding time to start), parameters, such as the parameters of the instrument based on intelligent control algorithm and record automatically calculated under a pack of fast feeding nc feeding schedule parameters such as slow.By this analogy, the instrument can quickly calculate the best parameters suitable for the current material through self-learning and self-adaptation, and achieve the best packing speed on the premise of ensuring the packaging precision.Such as in case of large out-of-tolerance instrument immediately transferred to re-enter the intelligent state of accelerated mode, namely each weighing hopper packing according to the parameters of the safe mode for the first time, and then calculate the corresponding optimization parameters, later will work into normal intelligent acceleration mode, as the instrument of intelligent computing parameters constantly dynamic correction precision to ensure that the packaging and the best packaging speed.In order to adapt to the changes of different field environment and material characteristics, some parameters should be input according to the field conditions in the intelligent acceleration mode, such as target set value, fast feed advance amount, slow feed advance amount, fast feed advance safety factor, slow feed advance safety factor, slow feed minimum time, etc.In the intelligent control algorithm, the flow of fast feed and slow feed can be calculated by the time in the corresponding state recorded by the instrument (including the time of starting feeding), and the comparison with the normal value can be used to determine whether there is abnormal conditions such as material blocking and lack of material, and the output alarm prompt.At the end of the fast feed recorded by the instrument, the value of the fast feed advance can be adjusted to optimize the packaging speed.In the case of no material blocking or lack of material, if the value of the meter at the end of the fast feed is within the normal range, and the slow feed time exceeds the minimum slow feed time range, the meter can automatically optimize the fast feed advance according to the intelligent control algorithm;In the case of no material blocking or lack of material, the method of adjusting the value of slow feeding advance through the final weighing value recorded by the instrument can ensure the packaging precision.Of course, the above intelligent control algorithm is for reference only, and the specific implementation needs to be further designed by the relevant instrument developers according to the problems on the scene.If the type or specification of packaging material needs to be changed after the change of formula and re-enter the intelligent acceleration mode, the parameters can be automatically calculated by the meter, or the parameters can be manually determined in the safety mode of the corresponding formula for packaging.Generally, intelligent acceleration mode is preferred, and manual parameter determination is only an option.If the material characteristics change greatly or other factors have a great impact on the site, you can choose to work in the safe mode by pressing the button, and the intelligent acceleration mode is prohibited.

3. Intelligent quantitative packaging scale other functions

The intelligent quantitative packing scale can not only achieve the optimal packing speed on the premise of ensuring the packaging precision, but also solve some problems in the actual packaging process by adding other functions.Such as in the packaging process, due to some field production reasons (such as the replacement of flat car, lower conveyor bag and fault maintenance, etc.) need to stop packing for a long time.Because the characteristics of the material in the silo will change after a long time of rest, it is easy to appear out of tolerance if the material is packed according to the previous parameters.After the use of intelligent quantitative packaging scale, although the instrument works in the intelligent acceleration mode, such as stop working over the set pause time (can be set in the instrument parameters), the instrument automatically re-enters the intelligent acceleration mode, to solve the long time stop working bin material characteristics of the change of the impact.

4. Conclusion

It is the development trend of packaging industry to improve the degree of intelligence, reduce the requirements for operators and improve efficiency.The intelligent quantitative packing scale has introduced the function of self-learning and self-adaptation, and can reach the best packing speed on the premise of ensuring the packaging precision, so it has a better development prospect.

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