A high-precision batching control system

Abstract

The invention discloses a high-precision batching control system, comprising the following steps: step one: idle state, in which the steady state of weight is judged; step two: start delay, when there is a start weighing signal, the weighing device starts to act after a delay period, and whether it is in a steady state is continuously judged during this period; the batching control system realizes high-precision weighing by fast and slow feeding of the weighing device, can dynamically adjust the lead time for accurate weighing to avoid over-tolerance, and can weigh more accurately by judging the steady state of the material. The weight can be judged more accurately for the steady state judgment to avoid the weighing error caused by the instability of the weighing bucket, and the fast feeding speed can be adjusted in time for the calculation of the weighing flow to avoid over-tolerance caused by the instability of the material flow, and the lead time can be dynamically corrected and the lead time value can be dynamically adjusted to avoid the weighing error caused by the excessive or too small lead time again during the next batching.

Description

Technical Field

[0001] The invention relates to the technical field of high-precision batching control systems, in particular to a high-precision batching control system. Background Art

[0002] At present, most of the batching control procedures are implemented through fast / slow feeding. Fast feeding saves weighing time and speeds up the weighing cycle; slow feeding achieves precise weighing and ensures weighing accuracy.

[0003] The existing weighing technology can basically meet the material weighing under general conditions, but it will have certain defects for some industries with high precision requirements. For example, the steady state of the material should be judged before adding and after weighing to ensure that the current weight is an actual effective weight. For the judgment of material fluidity, the flow rate of the material is tracked by the weight change during the feeding process to judge the fluidity of the material. If the flow rate is too low, the alarm can be issued in time to notify the operator to make a timely judgment to avoid material shortage or motor failure. At the same time, for some materials with poor fluidity and uneven feeding, we can set two speeds in the fast feeding stage, and switch to a slow ratio through real-time flow updates to avoid exceeding the target value in the fast feeding stage. For the correction of the advance amount, the difference between the target value and the actual value at the end of the weighing is used to correct the advance amount, so that the actual value is closer to the target value at the next weighing, avoiding the need for inching due to the actual value not reaching the target value, which invisibly increases the weighing time and avoids the phenomenon of over-tolerance caused by the actual value being greater than the target value, providing weighing accuracy. Summary of the invention

[0004] The object of the present invention is to provide a high-precision batching control system to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a high-precision batching control system, comprising the following steps:

[0006] Step 1: Idle state, in which the steady state of weight is determined;

[0007] Step 2: Start delay. When there is a start weighing signal, the weighing equipment will start to operate after a delay period. During this period, it will continue to judge whether it is in a steady state.

[0008] Step 3: Initialization, when the start delay is reached, the initialization value begins, and the batching status and time are updated;

[0009] Step 4: Record the starting weight and calculate the total target value, interact with the instrument, and set the tare command;

[0010] Step 5: Start fast feeding, output fast feeding command and record fast feeding time;

[0011] Step 6: Start slow feeding, output slow feeding command and record slow feeding time. When the actual weight is greater than or equal to the slow feeding target value, and the filter delay is continuously turned off, the shutdown delay is entered. If there is a low flow alarm during feeding and the lead amount is less than the negative tolerance and the current weight is greater than or equal to the minimum net weight target value, the lead amount calculation is set to cancel and enter the weight judgment;

[0012] Step 7: Shutdown delay;

[0013] Step 8: Inching mode, slow feeding mode;

[0014] Step 9: Calculate the advance amount. If the advance amount calculation is canceled, directly enter the weight judgment. Otherwise, enter the advance amount calculation. After the calculation is completed, enter the weight judgment.

[0015] Step 10: Weight judgment. When the difference between the actual value and the target value is less than the negative deviation or greater than the positive deviation, an out-of-tolerance alarm is output and the operator is waiting for input. When the operator completes the input, the weighing is completed.

[0016] Preferably, in step 1, if the weight continues to fluctuate, a corresponding alarm will be generated.

[0017] Preferably, in step 5, when the actual weight is greater than or equal to the fast feeding target value, and the fast feeding filtering delay is continued, the slow feeding is entered.

[0018] Preferably, in the shutdown delay in step seven, the delay is to wait for the material to completely fall into the weighing bucket, and the weight is determined after the weighing bucket is in a stable state and the delay time is up.

[0019] Preferably, in step 7, when the current weight is less than the fast feeding target value, the fast feeding stage is re-entered. Otherwise, when the current weight is less than the slow feeding target value, the slow feeding is continued. Otherwise, when the current weight is less than the minimum net weight target value, the inching is entered. Otherwise, the advance amount calculation is entered.

[0020] Preferably, in step eight, when the inching time or the current weight is greater than or equal to the minimum net weight target value, the shutdown delay is entered.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention realizes high-precision weighing by fast and slow feeding of the weighing equipment, can dynamically adjust the advance amount for precise weighing, avoid over-tolerance, and can weigh more accurately by judging the steady state of the material. The judgment of the steady state can more accurately judge the weight and avoid the weighing error caused by the instability of the weighing bucket. For the calculation of the weighing flow rate, the speed of fast feeding can be adjusted in time to avoid over-tolerance caused by unstable material flow. The advance amount can be dynamically corrected and the advance amount value can be dynamically adjusted to avoid the weighing error caused by excessive or too small advance amount again during the next batching. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the flow chart structure of the present invention. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in 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 creative work are within the scope of protection of the present invention.

[0024] See also Figure 1 The present invention provides a technical solution: a high-precision batching control system, comprising the following steps:

[0025] Step 1: Idle state, in which the steady state of weight is determined;

[0026] Step 2: Start delay. When there is a start weighing signal, the weighing equipment will start to operate after a delay period. During this period, it will continue to judge whether it is in a steady state.

[0027] Step 3: Initialization, when the start delay is reached, the initialization value begins, and the batching status and time are updated;

[0028] Step 4: Record the starting weight and calculate the total target value, interact with the instrument, and set the tare command;

[0029] Step 5: Start fast feeding, output fast feeding command and record fast feeding time;

[0030] Step 6: Start slow feeding, output slow feeding command and record slow feeding time. When the actual weight is greater than or equal to the slow feeding target value, and the filter delay is continuously turned off, the shutdown delay is entered. If there is a low flow alarm during feeding and the lead amount is less than the negative tolerance and the current weight is greater than or equal to the minimum net weight target value, the lead amount calculation is set to cancel and enter the weight judgment;

[0031] Step 7: Shutdown delay;

[0032] Step 8: Inching mode, slow feeding mode;

[0033] Step 9: Calculate the advance amount. If the advance amount calculation is canceled, directly enter the weight judgment. Otherwise, enter the advance amount calculation. After the calculation is completed, enter the weight judgment.

[0034] Step 10: Weight judgment. When the difference between the actual value and the target value is less than the negative deviation or greater than the positive deviation, an out-of-tolerance alarm is output and the operator is waiting for input. When the operator completes the input, the weighing is completed.

[0035] In the step 1, if the weight fluctuates continuously, a corresponding alarm will be generated, which is convenient for understanding the steady state of the weight in the idle state. If it fluctuates continuously, an alarm will be generated to remind personnel that the weight fluctuates continuously.

[0036] In the step 5, when the actual weight is greater than or equal to the fast feeding target value and the fast feeding filtering delay is continued, the slow feeding is entered.

[0037] In the shutdown delay in step seven, the delay is to wait for the material to completely fall into the weighing bucket, and the weight is determined after the weighing bucket is in a stable state and the delay time is up.

[0038] In step 7, when the current weight is less than the fast feeding target value, the fast feeding stage is re-entered. Otherwise, when the current weight is less than the slow feeding target value, the slow feeding is continued. Otherwise, when the current weight is less than the minimum net weight target value, the inching is entered. Otherwise, the advance amount calculation is entered.

[0039] In the step eight, when the inching time or the current weight is greater than or equal to the minimum net weight target value, the shutdown delay is entered.

[0040] Specifically, in the idle state, the steady state of the weight will be judged. If the weight continues to fluctuate, a corresponding alarm will be generated; start delay, when there is a start weighing signal, the weighing equipment will start to operate after a delay, and during this period of time it will continue to judge whether it is in a steady state; initialization, when the start delay is over, the initialization value will be started, and the batching status and time will be updated; the starting weight will be recorded and the total target value will be calculated, and the interaction with the instrument will be set to the tare command; start fast feeding, output the fast feeding command and record the fast feeding time. When the actual weight is greater than or equal to the fast feeding target value, and the fast feeding is continuous If there is a filter delay, slow feeding will begin, slow feeding will be started, slow feeding command will be output and slow feeding time will be recorded. When the actual weight is greater than or equal to the slow feeding target value and the filter delay is continuously turned off, the shutdown delay will be entered; if there is a low flow alarm during re-feeding and the advance amount is less than the negative tolerance and the current weight is greater than or equal to the minimum net weight target value, the advance amount calculation will be canceled and weight judgment will be entered; shutdown delay, the delay is to wait for the material to fall completely into the weighing bucket, and the weight will be judged after the weighing bucket is in a stable state and the delay time is up. When the current weight is less than the fast feeding target value, the fast feeding stage will be re-entered. Otherwise, when the current weight is less than the slow feeding target value, continue to feed slowly; otherwise, when the current weight is less than the minimum net weight target value, enter the inching mode; otherwise, enter the lead calculation, inching mode, slow feeding mode, when the inching time or the current weight is greater than or equal to the minimum net weight target value, enter the shutdown delay; lead calculation, if the lead calculation is canceled, enter the weight judgment directly, otherwise enter the lead calculation, after the calculation is completed, enter the weight judgment; weight judgment, when the difference between the actual value and the target value is less than the negative deviation or greater than the positive deviation, an out-of-tolerance alarm is output, waiting for the operator to enter the command, and when the operator completes the input, the weighing is completed.

[0041] In the description of the present invention, it is necessary to understand that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0042] In addition, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first", "second", "third" and "fourth" may explicitly or implicitly include at least one of such features.

[0043] In the present invention, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0044] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-precision batching control system, It is characterized in that The steps include: Step 1: Idle state, in which the steady state of weight is determined; Step 2: Start delay. When there is a start weighing signal, the weighing equipment will start to operate after a delay period. During this period, it will continue to judge whether it is in a steady state. Step 3: Initialization, when the start delay is reached, the initialization value begins, and the batching status and time are updated; Step 4: Record the starting weight and calculate the total target value, interact with the instrument, and set the tare command; Step 5: Start fast feeding, output fast feeding command and record fast feeding time; Step 6: Start slow feeding, output slow feeding command and record slow feeding time; When the actual weight is greater than or equal to the slow feeding target value, and the filter delay is continuously turned off, the shutdown delay is entered; if there is a low flow alarm during the feeding period and the advance amount is less than the negative tolerance and the current weight is greater than or equal to the minimum net weight target value, the advance amount calculation is set to cancel and the weight judgment is entered; Step 7: Shutdown delay; Step 8: Inching mode, slow feeding mode; Step 9: Calculate the advance amount. If the advance amount calculation is canceled, directly enter the weight judgment. Otherwise, enter the advance amount calculation. After the calculation is completed, enter the weight judgment. Step 10: Weight judgment: when the difference between the actual value and the target value is less than the negative deviation or greater than the positive deviation, an out-of-tolerance alarm is output and the operator is waiting for input. When the operator completes the input, the weighing is completed. In step 1, if the weight continues to fluctuate, a corresponding alarm will be generated; In the step 5, when the actual weight is greater than or equal to the fast feeding target value and the fast feeding filtering delay is continued, the slow feeding is started; In the shutdown delay in step 7, the delay is to wait for the material to fall completely into the weighing bucket, and the weight is determined after the weighing bucket is in a stable state and the delay time is up; In step seven, when the current weight is less than the fast feeding target value, the fast feeding stage is re-entered; otherwise, when the current weight is less than the slow feeding target value, the slow feeding is continued; otherwise, when the current weight is less than the minimum net weight target value, the inching is entered; otherwise, the advance amount calculation is entered.

2. A high-precision batching control system according to claim 1, Features: In the step eight, when the inching time or the current weight is greater than or equal to the minimum net weight target value, the shutdown delay is entered.

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