A two-stage quantitative packaging continuous feeding control method

Abstract

This invention discloses a two-stage quantitative packaging continuous feeding control method, comprising two continuous stages: rapid feeding and precise feeding; wherein, the rapid feeding stage is a linear feeding stage, and the precise feeding stage is a non-linear feeding stage, and the two stages are connected without time difference; the feeding process of this invention is continuous, stable, and fast, resulting in high packaging efficiency and packaging accuracy.

Description

Technical Field

[0001] This invention relates to a quantitative packaging feeding control method, and more particularly to a two-stage quantitative packaging continuous feeding control method. Background Technology

[0002] Currently, quantitative packaging often adopts a three-stage, discontinuous, linear feeding control method. After each feeding stage, the weighing system controller compares the weighing result with the target value set for that stage, and then controls the feeding for the next stage based on the comparison result. This method suffers from serious time consumption, low packaging accuracy, and low packaging efficiency. As customers' requirements for packaging efficiency continue to increase, this feeding control method can no longer meet their needs, and there is an urgent need for a feeding control method to meet the ever-expanding market demand. Summary of the Invention

[0003] Purpose of the invention: The purpose of this invention is to provide a two-stage quantitative packaging continuous feeding control method. By dividing the feeding process into two continuous stages, rapid feeding and fine feeding, the feeding process can be continuous, stable, and executed quickly, thereby improving packaging accuracy and efficiency.

[0004] Technical Solution: This invention provides a two-stage quantitative packaging continuous feeding control method, comprising two continuous stages: rapid feeding and precise feeding; wherein the rapid feeding stage is a linear feeding stage, and the precise feeding stage is a non-linear feeding stage, and the two stages are connected without time difference; including the following steps:

[0005] (1) The weighing controller sets the quantitative packaging parameters according to the input parameters and plans the operating parameters of the feeder motor; it calculates the mass, speed and acceleration inside the quantitative packaging bag; the setting parameters include: quantitative packaging mass and total quantitative packaging time; the operating parameters include: feeder motor speed, feeder motor acceleration and speed change inflection point.

[0006] (2) The output quality of the feeder is characterized by a quintic polynomial time function, the output quality velocity of the feeder at each time point during the feeding process is characterized by a quartic polynomial time function, and the output quality acceleration of the feeder at each time point during the feeding process is characterized by a cubic polynomial time function.

[0007] (3) Calculate the feeding control parameters of the feeder;

[0008] (4) Calculate the motor control parameters of the feeder, i.e. the planning data of the feeder.

[0009] Furthermore, the formulas for calculating the mass and speed inside the quantitative packaging bag during the rapid feeding stage of step (1) are as follows:

[0010]

[0011]

[0012] in, v0 is the initial velocity of the increase in mass of the material inside the packaging bag during this stage, v1 is the velocity of the increase in mass of the material inside the packaging bag during this stage, and acceleration a1 = 0. This refers to the feeding time during this stage;

[0013] The formulas for calculating the mass, velocity, and acceleration inside the quantitative packaging bag during the fine feeding stage are as follows:

[0014]

[0015]

[0016]

[0017] in, This refers to the quality of the materials inside the pre-packaged bags at this stage. It is the rate at which the mass of the material inside the pre-packaged bag increases during this stage. This represents the acceleration of the increase in the mass of the material within the pre-packaged bag during this stage. This is the acceleration factor for the increase in the mass of the material inside the pre-packaged bag during this stage. This is the feeding time for this stage, and m1 is the material mass accumulated in the quantitative packaging bag during the rapid feeding stage.

[0018] Furthermore, the calculation methods for output mass, output mass velocity, and output mass acceleration in step (2) are as follows:

[0019] M(t) = k0 + k1t + k2t 2 +k3t3+k4t 4 +k5t 5

[0020] v M (t)=k1+2k2t+3k3t 2 +4k4t 3 +5k5t 4

[0021] a M (t)=2k2+63t+12k4t 2 +20k5t 3

[0022] Where t is time, M(t) represents output quality, and v M (t) represents the velocity and a at each time point during the feeding process. M(t) represents the acceleration at each time point during the feeding process, and k1, k2, k3, k4, and k5 are constant coefficients of each order.

[0023] Furthermore, the calculation method for step (3) is as follows: Let the fine feeding time be t3, and the feeding constraints of the feeder be:

[0024] Quality constraints:

[0025] M(0) = m1, M(t3) = M0

[0026] Speed ​​constraints:

[0027] v M (0) = v1, v M (t3)=0

[0028] Acceleration constraints:

[0029]

[0030] Where M(0) represents the feeder output mass at the beginning, v M (0) represents the feeder output mass velocity at the beginning of the feeding process, a M (0) represents the feeder output mass acceleration at the beginning of the feeding process; M(t3) represents the output mass at time t3, v M (t3) represents the feeder output mass velocity at time t3 during the feeding process, a M (t3) represents the feeder output mass acceleration at time t3 during the feeding process.

[0031] Furthermore, the calculation method for step (4) is as follows: Since the relationship coefficient N between the motor speed and the unloading speed of feeders with different structural forms is the corresponding feeder motor speed function, it is:

[0032] Rapid feeding stage:

[0033] Fine feeding stage:

[0034] The acceleration of the feeder motor is:

[0035] Rapid feeding stage:

[0036] Fine feeding stage:

[0037] in, This indicates the speed of the feeder motor. This indicates the acceleration of the feeder motor.

[0038] Furthermore, during the rapid feeding stage, the feeding equipment operates at full speed and uniform speed, causing the accumulated amount of material inside the packaging bag to increase linearly and at a uniform rate.

[0039] Furthermore, the initial state of the precise feeding stage is the end state of the rapid feeding stage, including feeding quality, feeding speed, and feeding acceleration.

[0040] Furthermore, the precise feeding stage is as follows: the feeding controller needs to determine that when the rapid feeding stage ends, the accumulated amount of material in the packaging bag has reached 90% of the set feeding amount, and the remaining 10% of the feeding amount enters precise control.

[0041] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: the feeding process of the present invention is continuous and stable, the execution is rapid, and the packaging efficiency and packaging accuracy are high. Attached Figure Description

[0042] Figure 1 This is a cumulative mass curve of the materials inside the packaging bag of the present invention;

[0043] Figure 2 This is a curve showing the cumulative mass rate of materials inside the packaging bag of this invention.

[0044] Figure 3 This is a graph showing the cumulative acceleration of the mass of the material inside the packaging bag of this invention. Detailed Implementation

[0045] The technical solution of the present invention will be further described below with reference to the accompanying drawings.

[0046] like Figure 1-3 As shown, an embodiment of the present invention provides a two-stage quantitative packaging continuous feeding control method, comprising two continuous stages: rapid feeding and precise feeding; wherein, the rapid feeding stage is a linear feeding stage, and the precise feeding stage is a non-linear feeding stage, and the two stages are connected without time difference; including the following steps:

[0047] (1) The weighing controller sets the quantitative packaging parameters according to the input parameters and plans the operating parameters of the feeder motor; it calculates the mass, speed, and acceleration inside the quantitative packaging bag; wherein, the set parameters include: quantitative packaging mass and total quantitative packaging time; the operating parameters include: feeder motor speed, feeder motor acceleration, and speed change inflection point; the calculation formulas for the mass and speed inside the quantitative packaging bag during the rapid feeding stage are as follows:

[0048]

[0049]

[0050] in, v0 is the initial velocity of the increase in mass of the material inside the packaging bag during this stage, v1 is the velocity of the increase in mass of the material inside the packaging bag during this stage, and acceleration a1 = 0. This refers to the feeding time during this stage;

[0051] The formulas for calculating the mass, velocity, and acceleration inside the quantitative packaging bag during the fine feeding stage are as follows:

[0052]

[0053]

[0054]

[0055] in, This refers to the quality of the materials inside the pre-packaged bags at this stage. It is the rate at which the mass of the material inside the pre-packaged bag increases during this stage. This represents the acceleration of the increase in the mass of the material within the pre-packaged bag during this stage. This is the acceleration factor for the increase in the mass of the material inside the pre-packaged bag during this stage. This is the feeding time for this stage, and m1 is the material mass accumulated in the quantitative packaging bag during the rapid feeding stage.

[0056] (2) The output mass of the feeder is characterized by a quintic polynomial time function, the output mass velocity of the feeder at each time point during the feeding process is characterized by a quartic polynomial time function, and the output mass acceleration of the feeder at each time point during the feeding process is characterized by a cubic polynomial time function; the calculation method is as follows:

[0057] M(t) = k0 + k l t+k2t 2 +k3t 3 +k4t 4 +k5t 5

[0058] v M (t)=k1+2k2t+3k3t 2 +4k4t 3 +5k5t 4

[0059] a M (t)=2k2+6k3t+12k4t 2 -20k5t 3

[0060] Where t is time, M(t) represents output quality, and v M (t) represents the velocity and a at each time point during the feeding process. M(t) represents the acceleration at each time point during the feeding process, and k1, k2, k3, k4, and k5 are constant coefficients of each order.

[0061] (3) Calculate the feeding control parameters of the feeder; the calculation method is as follows: assuming the fine feeding time is t3, and the feeder feeding constraints are as follows:

[0062] Quality constraints:

[0063] M(0) = m1, M(t3) = M0

[0064] Speed ​​constraints:

[0065] v M (0) = v1, v M (t3)=0

[0066] Acceleration constraints:

[0067] a M (0) = 0, a M (t3)=0

[0068] Where M(0) represents the feeder output mass at the beginning, v M (0) represents the feeder output mass velocity at the beginning of the feeding process, a M (0) represents the feeder output mass acceleration at the beginning of the feeding process; M(t3) represents the output mass at time t3, v M (t3) represents the feeder output mass velocity at time t3 during the feeding process, a M (t3) represents the feeder output mass acceleration at time t3 during the feeding process.

[0069] (4) Calculate the motor control parameters of the feeder, i.e., the planning data of the feeder; the calculation method is as follows: Since the relationship coefficient N between the motor speed and the unloading speed of the feeder for different structural forms of feeders is, the corresponding motor speed function of the feeder is:

[0070] Rapid feeding stage:

[0071] Fine feeding stage:

[0072] The acceleration of the feeder motor is:

[0073] Rapid feeding stage:

[0074] Fine feeding stage:

[0075] in, This indicates the speed of the feeder motor. This indicates the acceleration of the feeder motor.

[0076] The rapid feeding stage involves the feeding equipment operating at full and uniform speed, causing the accumulated material in the packaging bag to increase linearly at a uniform rate. The initial state of the precise feeding stage is the end state of the rapid feeding stage, including feeding quality, feeding speed, and feeding acceleration; specifically, the feeding controller needs to determine that at the end of the rapid feeding stage, the accumulated material in the packaging bag has reached 90% of the set feeding amount, and the remaining 10% of the feeding amount enters precise control.

Claims

1. A two-stage ration package continuous feeding control method, characterized by, include: The process involves two consecutive stages: rapid feeding and precise feeding. The rapid feeding stage is linear, while the precise feeding stage is non-linear, and the two stages are connected without time difference. The process includes the following steps: (1) The weighing controller sets the quantitative packaging parameters according to the input parameters and plans the operating parameters of the feeder motor; it calculates the mass, speed, and acceleration inside the quantitative packaging bag; the setting parameters include: quantitative packaging mass and total quantitative packaging time; the operating parameters include: feeder motor speed, feeder motor acceleration, and speed change inflection point; the formulas for calculating the mass and speed inside the quantitative packaging bag during the rapid feeding stage are as follows: in, v0 is the initial velocity of the increase in mass of the material inside the packaging bag during this stage, v1 is the velocity of the increase in mass of the material inside the packaging bag during this stage, and acceleration a1=0. This refers to the feeding time during this stage; The formulas for calculating the mass, velocity, and acceleration inside the quantitative packaging bag during the fine feeding stage are as follows: in, This refers to the quality of the materials inside the pre-packaged bags at this stage. It is the rate at which the mass of the material inside the pre-packaged bag increases during this stage. This represents the acceleration of the increase in the mass of the material within the pre-packaged bag during this stage. This is the acceleration factor for the increase in the mass of the material inside the pre-packaged bag during this stage. This is the feeding time for this stage, and m1 is the material mass accumulated in the quantitative packaging bag during the rapid feeding stage. (2) The output mass of the feeder is represented by a quintic polynomial time function, the output mass velocity of the feeder at each time point during the feeding process is represented by a quartic polynomial time function, and the output mass acceleration of the feeder at each time point during the feeding process is represented by a cubic polynomial time function. The calculation methods for output mass, output mass velocity, and output mass acceleration are as follows: Where t is time, M(t) represents output quality, and v M (t) represents the velocity and a at each time point during the feeding process. M (t) represents the acceleration at each time point during the feeding process, and k1, k2, k3, k4, and k5 are constant coefficients of each order; (3) calculating the feeding control parameters of the feeder; the calculation method is as follows: assuming that the fine feeding time length is , the feeder feeding constraint condition is: Quality constraints: Speed ​​constraints: Acceleration constraints: Where M(0) represents the feeder output mass at the beginning, v M (0) represents the feeder output mass velocity at the beginning of the feeding process, a M (0) represents the feeder output mass acceleration at the beginning of the feeding process; M(t3) represents the output mass at time t3, v M (t3) represents the feeder output mass velocity at time t3 during the feeding process, a M (t3) represents the feeder output mass acceleration at time t3 during the feeding process. (4) Calculate the motor control parameters of the feeder, i.e., the planning data of the feeder; the calculation method is as follows: Since the relationship coefficient N between the motor speed and the unloading speed of the feeder for different structural forms of feeders is, the corresponding motor speed function of the feeder is: Fast dosing phase: Fine dosing stage: The acceleration of the feeder motor is: Fast dosing phase: Fine dosing stage: wherein, represents the motor speed of the feeder, represents the motor acceleration of the feeder.

2. The two-stage ration packaging continuous feeding control method according to claim 1, characterized in that, During the rapid feeding stage, the feeding equipment operates at full speed and uniform speed, causing the accumulated amount of material in the packaging bag to increase linearly and at a uniform rate.

3. The two-stage quantitative packaging continuous feeding control method according to claim 1, characterized in that, The initial state of the precise feeding stage is the end state of the rapid feeding stage, including feeding quality, feeding speed, and feeding acceleration.

4. The two-stage ration packaging continuous feeding control method according to claim 1, characterized in that, The precise feeding stage is as follows: the feeding controller needs to determine that when the rapid feeding stage ends, the accumulated amount of material in the packaging bag has reached 90% of the set feeding amount, and the remaining 10% of the feeding amount enters precise control.

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