A dosing system for a dosing apparatus for quantitative packaging and a method for continuous dosing control

Abstract

The application discloses a kind of quantitative packaging equipment feed system and continuous feed control method, the system includes: material storage bin, material feeder, discharge control valve, quantitative packaging bag, weighing sensor, weighing metering module, weighing control module;The material storage bin connects material feeder, material feeder is connected below discharge control valve, discharge control valve is equipped with quantitative packaging bag below, quantitative packaging bag connects weighing sensor, weighing sensor connects weighing metering module, weighing metering module connects weighing controller;The weighing controller is electrically connected with material feeder and discharge control valve respectively;The feeding process of the application is continuous, stable, and the feeding precision is high, the packaging efficiency is high, time is saved.

Description

TECHNICAL FIELD

[0001] The present application relates to a quantitative packaging system and a feeding control method, in particular to a quantitative packaging equipment feeding system and a continuous feeding control method. BACKGROUND

[0002] The quantitative packaging is usually controlled by a three-stage, non-continuous and linear feeding method. After each feeding stage, the weighing system controller compares the weighing result with the target value set in the stage, and then controls the feeding in the next stage according to the comparison result. This method has the problems of time-consuming and low packaging efficiency. With the increasing demand of customers for packaging efficiency, this feeding control method cannot meet the needs of customers, and a feeding control method is urgently needed to meet the growing market demand. SUMMARY

[0003] The purpose of the present application is to provide a quantitative packaging equipment feeding system and a continuous feeding control method to solve the problems of time-consuming and low packaging efficiency.

[0004] Technical scheme: The quantitative packaging equipment feeding system and the continuous feeding control method, the system comprises: a material storage bin, a material feeder, a discharging control valve, a quantitative packaging bag, a weighing sensor, a weighing metering module, a weighing control module; the material storage bin is connected with the material feeder, the material feeder is connected with the discharging control valve below, the discharging control valve below is provided with the quantitative packaging bag, the quantitative packaging bag is connected with the weighing sensor, the weighing sensor is connected with the weighing metering module, and the weighing metering module is connected with the weighing controller; the weighing controller is electrically connected with the material feeder and the discharging control valve respectively.

[0005] Further, the feeding control method comprises the following steps:

[0006] (1) The weighing controller calculates the mass, speed and acceleration in the quantitative packaging bag according to the input quantitative packaging setting parameters and plans the running parameters of the motor of the feeder; wherein the setting parameters include: quantitative packaging mass, total duration of quantitative packaging time; the running parameters include: material feeder motor speed, material feeder motor acceleration, speed change turning point;

[0007] (2) The output mass of the feeder is characterized by a quintic polynomial time function, the output mass speed of the feeder at each time point in the feeding process is characterized by a quartic polynomial time function, and the output mass acceleration of the feeder at each time point in the feeding process is characterized by a cubic polynomial time function;

[0008] (3) Calculate the feeding control parameters of the feeder;

[0009] (4) Calculate the motor control parameters of the feeder, that is, the planning data of the feeder.

[0010] Further, the step (1) quantitative packaging bag mass, speed, acceleration calculation method as follows:

[0011]

[0012]

[0013]

[0014] Wherein, is the mass of the material in the quantitative packaging bag at this stage, is the speed of the material mass increase in the quantitative packaging bag at this stage, is the acceleration of the material mass increase in the quantitative packaging bag at this stage, is the jerk of the material mass increase in the quantitative packaging bag at this stage, is the feeding time at this stage.

[0015] Further, the step (2) output mass, output mass speed, output mass acceleration calculation method as follows:

[0016] M(t) = k0 + k1t + k2t 2 + k3t 3 + k4t 4 + k5t 5

[0017] v M (t) = k1 + 2k2t + 3k3t 2 + 4k4t 3 + 5k5t 4

[0018] a M (t) = 2k2 + 6k3t + 12k4t 2 + 20k5t 3

[0019] Wherein, t is time, M(t) represents the output mass, v M (t) represents the speed at each time point during the feeding process and a M (t) represents the acceleration at each time point during the feeding process, k1, k2, k3, k4, k5 are the constant coefficients of each order;

[0020] Further, the step (3) calculation method as follows: let the precision feeding time be t1, and the feeding machine feeding constraint condition:

[0021] Mass constraint:

[0022] M(0) = 0, M(t1) = M0;

[0023] Velocity constraint:

[0024] v M (0) = 0, v M (t1) = M0;

[0025] Acceleration constraint:

[0026] a M (0) = 0, a M (t1) = M0;

[0027] Wherein, M(0) represents the feeder output mass at the beginning, v M (0) represents the feeder output mass velocity at the beginning in the feeding process, a M (0) represents the feeder output mass acceleration at the beginning in the feeding process; M(t1) represents the output mass at t1, v M (t1) represents the feeder output mass velocity at t1 in the feeding process, a M (t1) represents the feeder output mass acceleration at t1 in the feeding process.

[0028] Further, the step (4) calculation method is as follows: the relationship coefficient between the speed of the motor of the feeder of different structure forms and the discharging speed of the feeder is defined as N, and the corresponding speed function of the motor of the feeder is:

[0029]

[0030] The acceleration of the motor of the feeder is,

[0031]

[0032] Wherein, represents the motor speed at t in the feeding process, represents the motor acceleration at t in the feeding process, represents the motor jerk at t in the feeding process.

[0033] Further, the material feeder comprises one or a combination of a screw feeder, a vane feeder.

[0034] Beneficial effects: compared with the prior art, the present application has the following remarkable advantages: the feeding process is continuous and stable, the feeding precision is high, the packaging efficiency is high, and the time is saved BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 The present application is a schematic diagram.

[0036] Figure 2A material mass accumulation curve in a packaging bag of the present application.

[0037] Figure 3 A material mass accumulation speed curve in a packaging bag of the present application.

[0038] Figure 4 A material mass accumulation acceleration curve in a packaging bag of the present application. DETAILED DESCRIPTION

[0039] The technical solutions of the present application are further described below in combination with the drawings.

[0040] As shown in the drawings, the present application provides a dosing packaging equipment feeding system, which comprises a material storage bin, a material feeder, a discharging control valve, a dosing packaging bag, a weighing sensor, a weighing metering module, and a weighing controller. Figures 1-4 The material storage bin is connected to the material feeder, the material feeder is connected to the discharging control valve below, the dosing packaging bag is arranged below the discharging control valve, the dosing packaging bag is connected to the weighing sensor, the weighing sensor is connected to the weighing metering module, and the weighing metering module is connected to the weighing controller.

[0041] The weighing sensor measures the weight of the dosing packaging bag in real time and transmits the measurement results to the weighing metering module in real time. The weighing metering module converts the mass analog signal of the dosing packaging bag collected by the weighing sensor into an electrical signal and sends it to the weighing controller.

[0042] The material feeder comprises one or a combination of a screw feeder and a vane feeder.

[0043] The feeding control method comprises the following steps:

[0044] (1) The weighing controller calculates the mass, speed, and acceleration in the dosing packaging bag according to the input dosing packaging set parameters and the planned running parameters of the motor of the feeder. The set parameters include the dosing packaging mass and the total duration of the dosing packaging time. The running parameters include the motor speed of the material feeder, the motor acceleration of the material feeder, and the speed change turning point.

[0045] The calculation method of the mass, speed, and acceleration in the dosing packaging bag is as follows:

[0046]

[0047]

[0048]

[0049] wherein, M is the mass of the material in the dosing bag at the stage, v is the speed of the mass increase of the material in the dosing bag at the stage, a is the acceleration of the mass increase of the material in the dosing bag at the stage, j is the jerk of the mass increase of the material in the dosing bag at the stage, t is the time length of the dosing at the stage.

[0050] (2) The output mass of the feeder is represented by a quintic polynomial time function, the speed of the output mass of the feeder at each time point in the dosing process is represented by a quartic polynomial time function, and the acceleration of the output mass of the feeder at each time point in the dosing process is represented by a cubic polynomial time function; the formulas are as follows:

[0051] M(t) = k0 + k1t + k2t 2 + k3t 3 + k4t 4 + k5t 5

[0052] v M (t) = k1 + 2k2t + 3k3t 2 + 4k4t 3 + 5k5t 4

[0053] a M (t) = 2k2 + 6k3t + 12k4t 2 + 20k5t 3

[0054] wherein, t is time, M(t) represents the output mass, v M (t) represents the speed at each time point in the dosing process, and a M (t) represents the acceleration at each time point in the dosing process, k1, k2, k3, k4, and k5 are constant coefficients of each order;

[0055] (3) The dosing control parameters of the feeder are calculated; the formulas are as follows:

[0056] Let the fine dosing time be t1, and the feeder dosing constraint condition be:

[0057] Mass constraint:

[0058] M(0) = 0, M(t1) = M0;

[0059] Speed constraint:

[0060] v M (0) = 0, vM (t1) = 0;

[0061] Acceleration constraint:

[0062] a M (0) = 0, a M (t1) = 0;

[0063] wherein M(0) represents the output mass of the feeder at the beginning, v M (0) represents the output mass speed of the feeder at the beginning during the feeding process, a M (0) represents the output mass acceleration of the feeder at the beginning during the feeding process; M(t1) represents the output mass at t1, v M (t1) represents the output mass speed of the feeder at t1 during the feeding process, a M (t1) represents the output mass acceleration of the feeder at t1 during the feeding process.

[0064] (4) calculating the motor control parameters of the feeder, i.e. the planning data of the feeder; the calculation method is as follows: the relationship coefficient between the rotating speed of the motor of the feeder with different structural forms and the discharge speed of the feeder is defined as N, then the rotating speed function of the corresponding motor of the feeder is:

[0065]

[0066] The acceleration of the motor of the feeder is,

[0067]

[0068] wherein, represents the motor speed at t during the feeding process, represents the motor acceleration at t during the feeding process, represents the motor jerk at t during the feeding process.

Claims

1. A feeding system for quantitative packaging equipment, characterized in that, include: The system includes a material storage bin, a material feeder, a discharge control valve, a pre-packaged bag, a load cell, a weighing module, and a weighing control module. The material storage bin is connected to the material feeder. Below the material feeder is the discharge control valve. Below the discharge control valve is a pre-packaged bag connected to the load cell. The load cell is connected to the weighing module, which is connected to a weighing controller. The weighing controller is electrically connected to both the material feeder and the discharge control valve, and is used to execute the following continuous feeding control method, including the following steps: (1) The weighing controller sets the parameters according to the input quantitative packaging settings 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 calculation methods for the mass, speed, and acceleration inside the quantitative packaging bag 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 refers to the feeding time during this stage; (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 methods for output mass, output mass velocity, and output mass acceleration are as follows: M(t)=k0+k1t+k2t 2 +k3t 3 +k4t 4 +k5t 5 v M (t)=k1+2k2t+3k3t 2 +4k4t 3 +5k5t 4 a M (t)=2k2+6k3t+12k4t 2 +20k5t 3 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) Calculate the feeding control parameters of the feeder; the calculation method is as follows: Let the feeding time of the precision feeding system be t1, and the feeding constraints of the feeder be: Quality constraints: M(0) = 0, M(t1) = M0; Speed ​​constraints: v M (0)=0,v M (t1)=0; Acceleration constraints: from M (0)=0,a M (t1)=0; 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(t1) represents the output mass at time t1, v M (t1) represents the feeder output mass velocity at time t1 during the feeding process, a M (t1) represents the feeder output mass acceleration at time t1 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: Define the relationship coefficient between the motor speed of the feeder with different structural forms and the unloading speed of the feeder as N, then the corresponding motor speed function of the feeder is: The acceleration of the feeder motor is, in, This represents the motor speed at time t during the feeding process. This represents the motor acceleration at time t during the feeding process. This represents the motor jerk at time t during the feeding process.

2. The feeding system for a quantitative packaging equipment according to claim 1, characterized in that, Material feeders include one or a combination of screw feeders and impeller feeders.

Images