Self-adaptive control system for feeding of weightlessness metering scale and control method of self-adaptive control system

Abstract

The invention discloses a weightlessness metering scale material supplementing self-adaptive control system and a control method thereof, and the method comprises the steps: collecting material weight data on a weightlessness metering scale, the speed of a feeding motor, a feeding flow setting value and a feeding real-time flow value through a data collection unit, and storing the data in a data storage unit; the data analysis and optimization unit performs analysis according to the data in the data storage unit and generates a relation curve of the material weight data of the weightlessness metering scale in the material supplementing process and the speed of a feeding motor, and the weightlessness metering scale control unit controls the weightlessness metering scale to be fed according to the relation curve and the target parameter data. And a control instruction is generated and sent to the output control unit to control the speed of a feeding motor and the opening and closing of a feeding valve, and feeding control and flow PID control are performed on the weightlessness metering scale, so that the feeding flow of the weightlessness metering scale is stabilized at a feeding flow set value. The technical problem that due to the fact that an existing weightlessness metering scale supplements materials at a constant speed, the actual feeding mass flow fluctuation in the material supplementation process is large, and the metering precision of the weightlessness metering scale is affected is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of metering equipment, and in particular to a weight-loss metering scale feeding adaptive control system and a control method thereof. Background Art

[0002] Loss-in-weight scales are automatic weighing devices that achieve high-precision, continuous quantitative feeding through dynamic weighing. Existing loss-in-weight scales use a volumetric measurement method during the refill process, maintaining a constant feed motor speed. When material characteristics are affected by the level of the material within the scale, maintaining a constant feed speed can lead to significant fluctuations in the actual feed mass flow rate, impacting the scale's accuracy. Summary of the Invention

[0003] The present invention provides an adaptive feeding control system and a control method for a loss-in-weight scale, which are used to solve the technical problem that the existing loss-in-weight scale feeds at a constant speed, resulting in large fluctuations in the mass flow rate of the actual feed during the feeding process, thereby affecting the metering accuracy of the loss-in-weight scale.

[0004] In view of this, the first aspect of the present invention provides a loss-in-weight scale feeding adaptive control system, comprising a data acquisition unit, a data storage unit, a loss-in-weight scale control unit, a data analysis and optimization unit, and an output control unit;

[0005] A data acquisition unit is used to collect material weight data, feeding motor speed, feeding flow setting value and feeding real-time flow value on the loss-in-weight measuring scale, and send the material weight data, feeding motor speed, feeding flow setting value and feeding real-time flow value to the data storage unit;

[0006] A data storage unit is used to store target parameter data of the loss-in-weight scale, the target parameter data including material weight data, feeding motor speed, feeding flow setting value and feeding real-time flow value;

[0007] A data analysis and optimization unit is used to analyze the target parameter data of the data storage unit, generate a relationship curve between the material weight data and the feeding motor speed of the loss-in-weight scale during the feeding process, and send the relationship curve to the loss-in-weight scale control unit;

[0008] The loss-in-weight scale control unit is used to perform feeding control and flow PID control on the loss-in-weight scale according to the relationship curve and target parameter data, so that the feeding flow of the loss-in-weight scale is stable at the feeding flow setting value;

[0009] The output control unit is used to control the feeding motor speed and the feeding valve switch according to the control instructions of the loss-in-weight dosing scale control unit.

[0010] Optionally, the loss-in-weight scale control unit is further used to:

[0011] According to the feeding flow setting value and the real-time feeding flow value, the feeding flow deviation alarm control is performed on the loss-in-weight weighing scale.

[0012] Optionally, the data storage unit is further used to store the relationship curve.

[0013] Optionally, the data analysis and optimization unit is further configured to:

[0014] After the loss-in-weight metering scale completes a loss-in-weight metering cycle, the target parameter data of the most recent loss-in-weight metering cycle is preprocessed, and the relationship curve between the material weight data and the feeding motor speed of the loss-in-weight metering scale during the feeding process is refitted.

[0015] Optionally, the relationship curve is a linear function of the feeding motor speed with respect to the material weight data.

[0016] The second aspect of the present invention provides a control method for the weight loss metering feed adaptive control system according to any one of the first aspects of the present invention, comprising the following steps:

[0017] S1. Collect target parameter data of the loss-in-weight scale, including the material weight data on the loss-in-weight scale, the feeding motor speed, the feeding flow setting value, and the feeding real-time flow value;

[0018] S2. Analyze the target parameter data and generate a relationship curve between the material weight data and the feeding motor speed of the loss-in-weight scale during the feeding process;

[0019] S3. Generate control instructions based on the relationship curve and target parameter data to control the feeding motor speed and feeding valve switch, perform feeding control and flow PID control on the loss-in-weight scale, so that the feeding flow of the loss-in-weight scale is stable at the feeding flow setting value.

[0020] Optionally, after step S1, the following steps are further included:

[0021] S4. Based on the feeding flow setting value and the real-time feeding flow value, the feeding flow deviation alarm control is performed on the loss-in-weight weighing scale.

[0022] Optionally, after step S2, the following steps are further included:

[0023] S5. Storage relationship curve.

[0024] Optionally, after step S3, the following steps are further included:

[0025] S6. After the loss-in-weight metering scale completes a loss-in-weight metering cycle, the target parameter data of the most recent loss-in-weight metering cycle is preprocessed, and a relationship curve between the material weight data and the feeding motor speed of the loss-in-weight metering scale during the feeding process is refitted.

[0026] Optionally, the relationship curve is a linear function of the feeding motor speed with respect to the material weight data.

[0027] From the above technical solutions, it can be seen that the adaptive control system and control method of the weight loss metering scale feeding provided by the present invention have the following advantages:

[0028] The present invention provides an adaptive feeding control system and a control method for a loss-in-weight scale. A data acquisition unit collects material weight data, a feeding motor speed, a feeding flow setting value, and a real-time feeding flow value on the loss-in-weight scale and stores them in a data storage unit. A data analysis and optimization unit analyzes the data in the data storage unit to generate a relationship curve between the material weight data and the feeding motor speed of the loss-in-weight scale during the feeding process. The loss-in-weight scale control unit generates control instructions to an output control unit based on the relationship curve and target parameter data to control the feeding motor speed and the feeding valve switch, and performs feeding control and flow PID control on the loss-in-weight scale, so that the feeding flow of the loss-in-weight scale is stabilized at the feeding flow setting value. Adaptive adjustment of the feeding speed is achieved during the feeding process of the loss-in-weight scale, which greatly reduces the influence of changes in material properties on the accuracy of volume measurement and improves the accuracy of mass flow during the feeding process. This solves the technical problem that, in existing loss-in-weight scales, feeding at a constant speed causes large fluctuations in the mass flow of the actual feeding during the feeding process, thereby affecting the measurement accuracy of the loss-in-weight scale. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying any creative work.

[0030] Figure 1 This is a schematic structural diagram of a loss-in-weight scale feeding adaptive control system (including a loss-in-weight scale) provided in an embodiment of the present invention;

[0031] Figure 2 The present invention provides a flow chart of a control method for a weight loss metering feed adaptive control system. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0033] For easier understanding, see Figure 1 The present invention provides an embodiment of a loss-in-weight dosing scale feeding adaptive control system, comprising a data acquisition unit, a data storage unit, a loss-in-weight dosing scale control unit, a data analysis and optimization unit, and an output control unit.

[0034] The data acquisition unit is used to collect the material weight data, feeding motor speed, feeding flow setting value and feeding real-time flow value on the loss-in-weight measuring scale, and send the material weight data, feeding motor speed, feeding flow setting value and feeding real-time flow value to the data storage unit.

[0035] The data storage unit is used to store the target parameter data of the loss-in-weight scale, which includes material weight data, feeding motor speed, feeding flow setting value and feeding real-time flow value.

[0036] The data analysis and optimization unit is used to analyze the target parameter data of the data storage unit, generate a relationship curve between the material weight data and the feeding motor speed of the loss-in-weight scale during the feeding process, and send the relationship curve to the loss-in-weight scale control unit.

[0037] The loss-in-weight scale control unit is used to perform feeding control and flow PID control on the loss-in-weight scale according to the relationship curve and target parameter data, so that the feeding flow of the loss-in-weight scale is stabilized at the feeding flow setting value.

[0038] The output control unit is used to control the feeding motor speed and the feeding valve switch according to the control instructions of the loss-in-weight dosing scale control unit.

[0039] It should be noted that, in the embodiment of the present invention, Figure 1Where WI is the material weight on the loss-in-weight scale, M1 is the stirring motor, M2 is the feeding motor, M3 is the refilling motor, S1 is the feeding valve, and S2 is the refilling valve. The data acquisition unit collects the material weight data, feeding motor speed, feeding flow setting value, and real-time feeding flow value on the loss-in-weight scale. The material weight data, feeding motor speed, feeding flow setting value, and real-time feeding flow value on the loss-in-weight scale are sent to the data storage unit for storage. Therefore, the data storage unit stores historical data on the material weight data, feeding motor speed, feeding flow setting value, and real-time feeding flow value on the loss-in-weight scale during the loss-in-weight measurement process. The data analysis and optimization unit can call the internal data of the data storage unit, perform data analysis on the material weight data, feeding motor speed, feeding flow setting value, and real-time feeding flow value historical data in the data storage unit, and fit the relationship curve between the material weight data and the feeding motor speed of the loss-in-weight scale during the refilling process, and send the relationship curve to the loss-in-weight scale control unit. Based on the relationship curve and target parameter data, the control unit of the loss-in-weight scale generates corresponding control instructions to the output control unit, instructing it to control the feed motor speed and feed valve switch status, thereby implementing refill control and proportional-integral-derivative flow control (PID) for the scale, ensuring that the feed flow rate of the scale remains stable at the set feed flow rate. During operation, the control system sets upper and lower limits for the material weight on the scale. After the scale is refilled to the upper limit, the scale begins metering. During metering, the control system calculates the current feed flow rate based on the scale's weight loss, performs PID control on the feed flow rate, and adjusts the feed motor speed to maintain the current feed flow rate at the set feed flow rate. When the material weight on the scale reaches the lower limit, refilling begins. Since the material weight on the loss-in-weight scale increases during the refilling process, the feeding flow rate cannot be calculated based on the material weight. Therefore, it is necessary to switch to volumetric metering mode, lock the output speed of the feeding motor, and add material to the loss-in-weight scale at the same time. The next measurement can be performed after the weight of the loss-in-weight scale returns to the upper limit of the material weight.

[0040] In one embodiment, the loss-in-weight scale control unit is further configured to provide a feed flow deviation alarm for the loss-in-weight scale based on the feed flow setting value and the real-time feed flow value. When the real-time feed flow value deviates from the feed flow setting value by more than a threshold, the loss-in-weight scale control unit issues a feed flow deviation alarm, allowing personnel to promptly take corrective action and adjust the deviation.

[0041] In one embodiment, the data storage unit is further used to store a relationship curve. After the data analysis and optimization unit generates a relationship curve between the material weight data of the loss-in-weight scale and the feeding motor speed during the feeding process, the relationship curve is stored in the data storage unit.

[0042] In one embodiment, the data analysis and optimization unit is also used to pre-process the target parameter data of the most recent loss-in-weight metering cycle after the loss-in-weight metering scale completes a loss-in-weight metering cycle, and re-fit the relationship curve between the material weight data of the loss-in-weight metering scale during the feeding process and the feeding motor speed. After each loss-in-weight metering, before starting the feeding, the data analysis and optimization unit will analyze the most recent target parameter data, eliminate abnormal data, and re-fit the relationship curve between the material weight data of the loss-in-weight metering scale during the feeding process and the feeding motor speed. The relationship curve between the material weight data of the loss-in-weight metering scale during the feeding process and the feeding motor speed is fitted according to a linear function y=kx+b, where y is the feeding motor speed, x is the material weight of the loss-in-weight metering scale, and k and b are constant coefficients. The data analysis and optimization unit caches k and b, and the number of cached samples can be set according to actual conditions. The corrected k and b are calculated by the weighted arithmetic mean method, and finally output according to the corrected linear function.

[0043] The present invention provides an adaptive feeding control system for a loss-in-weight scale. A data acquisition unit collects material weight data, a feeding motor speed, a feeding flow setting value, and a real-time feeding flow value on the loss-in-weight scale and stores them in a data storage unit. A data analysis and optimization unit analyzes the data in the data storage unit to generate a relationship curve between the material weight data and the feeding motor speed of the loss-in-weight scale during the feeding process. The loss-in-weight scale control unit generates control instructions to an output control unit based on the relationship curve and target parameter data to control the feeding motor speed and the feeding valve switch, and performs feeding control and flow PID control on the loss-in-weight scale, so that the feeding flow of the loss-in-weight scale is stabilized at the feeding flow setting value. Adaptive adjustment of the feeding speed is achieved during the feeding process of the loss-in-weight scale, which greatly reduces the influence of changes in material properties on the accuracy of volume measurement and improves the accuracy of mass flow during the feeding process. This solves the technical problem that the existing loss-in-weight scale feeds at a constant speed, which causes large fluctuations in the mass flow of the actual feeding during the feeding process and affects the measurement accuracy of the loss-in-weight scale.

[0044] For easier understanding, see Figure 2 The present invention provides a control method for a weight loss metering feed adaptive control system. The control method is applied to the weight loss metering feed adaptive control system provided by the present invention. The control method comprises the following steps:

[0045] Step S1, collecting target parameter data of the loss-in-weight scale, the target parameter data including the material weight data on the loss-in-weight scale, the feeding motor speed, the feeding flow setting value and the feeding real-time flow value.

[0046] Step S2: Analyze the target parameter data to generate a relationship curve between the material weight data and the feeding motor speed of the loss-in-weight scale during the feeding process.

[0047] Step S3: Generate control instructions based on the relationship curve and target parameter data to control the feeding motor speed and feeding valve switch, perform feeding control and flow PID control on the loss-in-weight scale, so that the feeding flow of the loss-in-weight scale is stable at the feeding flow setting value.

[0048] In one embodiment, step S1 further includes:

[0049] S4. Based on the feeding flow setting value and the real-time feeding flow value, the feeding flow deviation alarm control is performed on the loss-in-weight weighing scale.

[0050] In one embodiment, step S2 further includes:

[0051] S5. Storage relationship curve.

[0052] In one embodiment, step S3 further includes:

[0053] S6. After the loss-in-weight scale completes a loss-in-weight scale cycle, preprocess the target parameter data of the most recent loss-in-weight scale cycle, and refit the relationship curve between the material weight data and the feeding motor speed during the refilling process of the loss-in-weight scale. The refitted relationship curve is stored.

[0054] In one embodiment, the relationship curve is a linear function of the feed motor speed with respect to the material weight data.

[0055] The working principle of the control method of the loss-in-weight metering scale feeding adaptive control system provided in the present invention has been described in the embodiment of the loss-in-weight metering scale feeding adaptive control system provided in the present invention and will not be repeated here.

[0056] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features thereof can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A weight loss metering feed adaptive control system, characterized in that: It includes data acquisition unit, data storage unit, weight loss measurement scale control unit, data analysis and optimization unit and output control unit; A data acquisition unit is used to collect material weight data, feeding motor speed, feeding flow setting value and feeding real-time flow value on the loss-in-weight measuring scale, and send the material weight data, feeding motor speed, feeding flow setting value and feeding real-time flow value to the data storage unit; A data storage unit is used to store target parameter data of the loss-in-weight scale, the target parameter data including material weight data, feeding motor speed, feeding flow setting value and feeding real-time flow value; A data analysis and optimization unit is used to analyze the target parameter data of the data storage unit, generate a relationship curve between the material weight data and the feeding motor speed of the loss-in-weight scale during the feeding process, and send the relationship curve to the loss-in-weight scale control unit; The loss-in-weight scale control unit is used to perform feeding control and flow PID control on the loss-in-weight scale according to the relationship curve and target parameter data, so that the feeding flow of the loss-in-weight scale is stable at the feeding flow setting value; The output control unit is used to control the feeding motor speed and the feeding valve switch according to the control instructions of the loss-in-weight dosing scale control unit.

2. The weight loss metering feed adaptive control system according to claim 1 is characterized in that: The loss-in-weight scale control unit is also used for: According to the feeding flow setting value and the real-time feeding flow value, the feeding flow deviation alarm control is performed on the loss-in-weight weighing scale.

3. The weight loss metering feed adaptive control system according to claim 1 is characterized in that: The data storage unit is also used to store the relationship curve.

4. The weight loss metering feed adaptive control system according to claim 1 is characterized in that: The data analysis and optimization unit is also used to: After the loss-in-weight metering scale completes a loss-in-weight metering cycle, the target parameter data of the most recent loss-in-weight metering cycle is preprocessed, and the relationship curve between the material weight data and the feeding motor speed of the loss-in-weight metering scale during the feeding process is refitted.

5. The weight loss metering feed adaptive control system according to any one of claims 1 to 4, characterized in that: The relationship curve is a linear function of the feeding motor speed with respect to the material weight data.

6. A control method for a weight-loss metering feed adaptive control system according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1. Collect target parameter data of the loss-in-weight scale, including the material weight data on the loss-in-weight scale, the feeding motor speed, the feeding flow setting value, and the feeding real-time flow value; S2. Analyze the target parameter data and generate a relationship curve between the material weight data and the feeding motor speed of the loss-in-weight scale during the feeding process; S3. Generate control instructions based on the relationship curve and target parameter data to control the feeding motor speed and feeding valve switch, perform feeding control and flow PID control on the loss-in-weight scale, so that the feeding flow of the loss-in-weight scale is stable at the feeding flow setting value.

7. The control method of the weight loss metering feed adaptive control system according to claim 6, characterized in that: After step S1, the following steps are also included: S4. Based on the feeding flow setting value and the real-time feeding flow value, the feeding flow deviation alarm control is performed on the loss-in-weight weighing scale.

8. The control method of the weight loss metering feed adaptive control system according to claim 6, characterized in that: After step S2, the following steps are also included: S5. Storage relationship curve.

9. The control method of the weight loss metering feed adaptive control system according to claim 6, characterized in that: After step S3, the following steps are also included: S6. After the loss-in-weight metering scale completes a loss-in-weight metering cycle, the target parameter data of the most recent loss-in-weight metering cycle is preprocessed, and a relationship curve between the material weight data and the feeding motor speed of the loss-in-weight metering scale during the feeding process is refitted.

10. The control method of the weight loss metering feed adaptive control system according to any one of claims 6 to 9, characterized in that: The relationship curve is a linear function of the feeding motor speed with respect to the material weight data.

Images