Control device, method and packing system for a material conveying device

Abstract

The present disclosure provides a control device, a method and a boxing system of a material conveying device, relating to the field of automation technology, the material conveying device comprising a first conveying device configured to operate to convey material to a packaging box, the method comprising, in a first mode: in the case that a difference between a target weight of the material in the packaging box and a measured weight is less than or equal to a first preset value, performing a first control, the first control being used to make the first conveying device continuously operate for a first duration and stop operating for a second duration after the first duration; and in the case that the difference within the second duration is greater than a second preset value, repeatedly performing the first control until the difference within the second duration is less than or equal to the second preset value.

Description

Technical Field

[0001] This disclosure relates to the field of automation control technology, and in particular to a control device, method and packing system for a material conveying device. Background Technology

[0002] Currently, material conveying devices can be used to transport materials to packaging boxes to achieve automated material packing.

[0003] In related technologies, in order to improve the accuracy of automated material packing and minimize the deviation between the actual weight and the target weight of the material in the packaging box after automated packing, the material conveying device can be controlled in the following way.

[0004] First, when the weight of the remaining material to be packed (i.e., the difference between the target weight of the material in the packaging box and the real-time measured weight) is large, the material conveying device is controlled to convey the material to the packaging box at a high operating speed to ensure the efficiency of automated material packing.

[0005] Then, when the weight of the remaining materials to be packed is small, the material conveying device is controlled to convey the materials to the packaging box at a low operating speed until the real-time measured weight of the materials in the packaging box reaches the target weight, and the automated packing ends. Summary of the Invention

[0006] However, the inventors noted that the accuracy of automated material packing in the relevant technologies is still low; that is, the actual weight of the material in the packaging box after automated packing still deviates significantly from the target weight.

[0007] Analysis revealed two main issues: First, the real-time weight measurement of materials within the packaging box fluctuates in the short period immediately following the material's entry into the box from the material conveyor. Second, the materials on the material conveyor are typically distributed at varying heights rather than uniformly, resulting in fluctuations in the weight of materials entering the packaging box per unit time.

[0008] Based on the above two phenomena, although the relevant technologies have controlled the material conveying device to operate at a lower speed when the weight of the remaining material to be packed is small, the accuracy of automated material packing is still low because the automated packing is triggered to end directly based on the real-time measured weight reaching the target weight.

[0009] In view of this, the present disclosure proposes the following solution to improve the accuracy of automated material packing.

[0010] According to one aspect of the present disclosure, a control method for a material conveying device is provided, the material conveying device including a first conveying device configured to operate to convey material to a packaging box, the method comprising, in a first mode: if the difference between a target weight and a measured weight of the material in the packaging box is less than or equal to a first preset value, executing a first control, the first control being configured to cause the first conveying device to continuously operate for a first duration and then stop operating for a second duration; and if the difference during the second duration is greater than a second preset value, repeating the first control until the difference during the second duration is less than or equal to the second preset value.

[0011] In some embodiments, the method further includes, in the first mode, performing a second control before the first control until the difference is less than or equal to the first preset value, wherein the second control is used to keep the first conveying device running continuously.

[0012] In some embodiments, the second control includes a first sub-control and a second sub-control following the first sub-control; and the first conveying device operates at a lower speed during the second sub-control than during the first sub-control.

[0013] In some embodiments, the material conveying device further includes a second conveying device configured to operate to convey material to the first conveying device; the method further includes, in the first mode: during the second sub-control, controlling the operating speed of the second conveying device to decrease to a preset speed.

[0014] In some embodiments, the preset speed is equal to 0.

[0015] In some embodiments, if the difference at the end of the second duration is greater than a second preset value, the first control is repeated until the difference at the end of the second duration is less than or equal to the second preset value.

[0016] In some embodiments, the second preset value is equal to 0.

[0017] In some embodiments, the method further includes, in a second mode, executing a third control until the difference is less than or equal to the second preset value, the third control being used to keep the first conveying device running continuously, wherein the third control includes a third sub-control and a fourth sub-control following the third sub-control, and the operating speed of the first conveying device during the fourth sub-control is less than the operating speed during the third sub-control; wherein the first mode is enabled when the required packing accuracy is greater than or equal to a preset accuracy, and the second mode is enabled when the packing accuracy is less than the preset accuracy.

[0018] According to another aspect of the present disclosure, a control device for a material conveying apparatus is provided, comprising: a module configured to perform the control method for the material conveying apparatus described in any of the above embodiments.

[0019] According to another aspect of the present disclosure, a control device for a material conveying apparatus is provided, comprising: a memory; and a processor coupled to the memory, configured to execute the control method for the material conveying apparatus described in any of the above embodiments based on instructions stored in the memory.

[0020] According to another aspect of the present disclosure, a packing system is provided, comprising: a control device for the material conveying device described in any of the above embodiments; and the material conveying device.

[0021] According to another aspect of the present disclosure, a computer-readable storage medium is provided, including computer program instructions, wherein when the computer program instructions are executed by a processor, they implement the control method of the material conveying device described in any of the above embodiments.

[0022] According to another aspect of the present disclosure, a computer program product is provided, including a computer program, wherein when the computer program is executed by a processor, it implements the control method of the material conveying device described in any of the above embodiments.

[0023] In this embodiment, if the difference between the target weight and the measured weight of the material in the packaging box is less than or equal to a first preset value, the first conveying device is controlled to run continuously for a first duration and then stop running for a second duration. If the difference during the second duration is greater than the second preset value, the first conveying device is repeatedly controlled to run continuously for the first duration and then stop running for the second duration until the difference during the second duration is less than or equal to the second preset value before the automated packing ends. This improves the accuracy of automated material packing.

[0024] The technical solutions of this disclosure will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1This is a schematic flowchart of a first mode of a control method for a material conveying device according to some embodiments of the present disclosure;

[0027] Figure 2 This is a schematic flowchart of a first mode of a control method for a material conveying device according to other embodiments of the present disclosure;

[0028] Figure 3 This is a schematic flowchart of a first mode of a control method for a material conveying device according to some embodiments of the present disclosure;

[0029] Figure 4 This is a schematic diagram of the structure of the control device of a material conveying apparatus according to some embodiments of the present disclosure;

[0030] Figure 5 This is a schematic diagram of the structure of the control device of a material conveying apparatus according to other embodiments of the present disclosure;

[0031] Figure 6 This is a schematic diagram of the structure of a packing system according to some embodiments of the present disclosure. Detailed Implementation

[0032] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0033] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of this disclosure.

[0034] At the same time, it should be understood that, for ease of description, the dimensions of the various parts shown in the accompanying drawings are not drawn according to actual scale.

[0035] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0036] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0037] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0038] This disclosure provides a control method for a material conveying device. Here, the material conveying device includes a first conveying device configured to operate to convey materials to packaging boxes.

[0039] In some embodiments, the material conveying device includes multiple belt segments connected in sequence, and the first conveying device is the last belt segment (also referred to as the feed belt) along the conveying direction of the multiple belt segments.

[0040] In some embodiments, the material may be, but is not limited to, tobacco.

[0041] The control method for the material conveying device in this disclosure includes a first mode. The following is in conjunction with... Figure 1 The first mode will be explained.

[0042] Figure 1 This is a schematic flowchart of a first mode of a control method for a material conveying device according to some embodiments of the present disclosure.

[0043] like Figure 1 As shown, the first mode includes steps 102 to 104.

[0044] In step 102, if the difference between the target weight and the measured weight of the material in the packaging box is less than or equal to a first preset value, the first control is executed.

[0045] The target weight is the total weight of the materials to be packed, while the measured weight is the real-time measured weight of the materials in the packing box during automated packing.

[0046] If the difference between the target weight and the measured weight of the material in the packaging box is less than or equal to a first preset value, it indicates that the remaining weight of the material to be packed is small. In this case, the first control is executed.

[0047] Here, the first control is used to cause the first conveying device to operate continuously for a first period of time and then stop operating for a second period of time. It can be understood that during the second period of stopped operation, the first conveying device ceases to convey materials to the packaging boxes.

[0048] For example, the first duration is 2 seconds, and the second duration is 1 second. In this case, the first conveyor is controlled to run continuously for 2 seconds to convey materials to the packaging box, and then stop running for 1 second to stop conveying materials to the packaging box.

[0049] In step 104, if the difference within the second time period is greater than the second preset value, the first control is repeated until the difference within the second time period is less than or equal to the second preset value.

[0050] In other words, if the first control has been executed once, it is determined whether to execute the next first control based on whether the difference between the target weight and the measured weight of the material in the packaging box during the second duration of this first control is greater than a second preset value.

[0051] It is understood that the second preset value can be any value that is less than the first preset value and not less than 0. In some embodiments, the second preset value can be determined based on the required packing accuracy. As some implementations, the higher the required packing accuracy, the smaller the second preset value. For example, if the required packing accuracy is ±0.5kg, the second preset value can be equal to 0.5kg.

[0052] If the difference between the target weight and the measured weight of the material in the box during the second duration of this first control is greater than a second preset value, it indicates that there is still a certain amount of material to be packed. In this case, the next first control is executed to continue automated packing.

[0053] If the difference between the target weight and the measured weight of the material in the box during the second time period of the first control is not greater than the second preset value, it indicates that the measured weight of the material in the box has basically reached the target weight. In this case, the automated boxing ends.

[0054] Since the first conveying device stops operating during the second time period, the real-time weight measurement of the materials in the packaging box during the second time period is relatively accurate.

[0055] The decision to continue automated packing (i.e., continue executing the first control) or end automated packing is based on whether the difference during the second period of the first conveyor's shutdown is greater than a second preset value, rather than directly based on whether the difference during the operation of the first conveyor is greater than a second preset value. This can improve the accuracy of automated packing of materials.

[0056] In the above embodiments, if the difference between the target weight and the measured weight of the material in the packaging box is less than or equal to a first preset value, the first conveying device is controlled to run continuously for a first duration and then stop running for a second duration. If the difference during the second duration is greater than the second preset value, the first conveying device is repeatedly controlled to run continuously for the first duration and then stop running for the second duration until the difference during the second duration is less than or equal to the second preset value before the automated packing ends. This improves the accuracy of automated material packing.

[0057] In some embodiments, in step 104, if the difference at the end of the second time period is greater than a second preset value, the first control is repeated until the difference at the end of the second time period is less than or equal to the second preset value. Since the measured weight of the material in the packaging box at the end of the second time period is more accurate, deciding whether to continue or end automated packing based on whether the difference from the first conveying device at the end of the second time period is greater than the second preset value can further improve the accuracy of automated packing.

[0058] It is understandable that, since the first conveying device operates cyclically under the first control in a manner of first running continuously and then stopping, the stage of executing the first control can also be called the precise pulse control stage.

[0059] Figure 2 This is a schematic flowchart of a first mode of a control method for a material conveying device according to other embodiments of the present disclosure.

[0060] like Figure 2 As shown, the first mode also includes step 202.

[0061] In step 202, the second control is executed until the difference between the target weight and the measured weight of the material in the packaging box is less than or equal to the first preset value.

[0062] Here, the second control is used to keep the first conveying device running continuously.

[0063] It is understandable that step 202 is executed before step 102. That is, the second control is executed before the first control.

[0064] In the above embodiments, if the difference between the target weight and the measured weight of the material in the packaging box is greater than a first preset value, a second control is executed to keep the first conveying device running continuously until the difference between the target weight and the measured weight of the material in the packaging box is less than or equal to the first preset value, at which point the first control is executed. In this way, the first conveying device can be controlled to run continuously to continuously transport material to the packaging box when the weight of the remaining material to be packed is large, and the first conveying device can be controlled to run and then stop only when the weight of the remaining material to be packed is small. This can improve both the accuracy and efficiency of automated material packing.

[0065] The first mode will be further explained below with reference to some embodiments.

[0066] In some embodiments, the second control includes a first sub-control and a second sub-control following the first sub-control, and the operating speed of the first conveying device during the second sub-control is less than the operating speed during the first sub-control.

[0067] Since the first conveying device rapidly supplies materials to the packaging box at a high operating speed during the first sub-control period, the stage of executing the first sub-control can also be called the rapid feeding stage.

[0068] Since the second sub-control is a transitional stage for stable accuracy between the rapid feeding stage and the precise pulse control stage, the stage in which the second sub-control is executed can also be called the stable accuracy stage.

[0069] In the above embodiments, the first conveying device is first controlled to run at a high speed continuously for a period of time during the first sub-control period, which can further improve the efficiency of automated material packing. Then, during the second sub-control period, the first conveying device is controlled to run at a low speed continuously for a period of time until the difference is less than or equal to a first preset value before the first control is executed. This can avoid the situation where there is too much material in the packaging box and the weight exceeds the target weight due to directly entering the precise pulse control stage from the rapid feeding stage, thereby further improving the accuracy of automated material packing.

[0070] In some embodiments, if the difference between the target weight and the measured weight of the material in the packaging box is less than or equal to a third preset value, the operating speed of the first conveying device can be reduced to switch from the first sub-control to the second sub-control.

[0071] To facilitate understanding, the following will be combined with... Figure 3 Please provide an explanation. Figure 3 This is a schematic flowchart of a first mode of a control method for a material conveying device according to some embodiments of the present disclosure.

[0072] like Figure 3 As shown, the first mode includes four stages: rapid feeding stage 301, stable accuracy stage 302, precise pulse control stage 303, and automated packing end stage 304.

[0073] First, automated packing begins, entering the rapid feeding stage 301.

[0074] During the rapid feeding phase 301, the first sub-control is executed to control the first conveying device to operate at a constant first speed.

[0075] As one implementation, the first speed can be the maximum speed at which the first conveyor can operate to further improve the efficiency of automated material packing. For example, the first conveyor can be controlled to operate at its maximum speed by controlling the motor of the first conveyor to operate at its maximum frequency. The maximum frequency of the motor could be, for example, 50 Hz.

[0076] Then, if the weight of the remaining material to be packed is less than or equal to a third preset value, the system enters the stabilization accuracy stage 302. The third preset value may be, for example, 1.5 kilograms.

[0077] In the stabilization accuracy stage 302, the second sub-control is executed to control the first conveying device to operate at a constant second speed.

[0078] It is understandable that the second speed is less than the first speed. As one implementation, the first conveyor can be controlled to change from operating at a constant first speed to operating at a constant second speed by reducing the operating frequency of the motor of the first conveyor (e.g., from 50 Hz to 5 Hz).

[0079] Then, if the weight of the remaining material to be packed is less than or equal to a first preset value, the system enters the precise pulse control stage 303. The first preset value may be, for example, 0.5 kg.

[0080] In the precise pulse control stage 303, the first control is executed to control the first conveying device to run continuously for a first duration and then stop running for a second duration.

[0081] In some implementations, the operating speed of the first conveying device during a first duration is equal to its operating speed (i.e., the second speed) during a second sub-control period.

[0082] If, within the second time period, the weight of the remaining material to be packed is measured to be greater than the second preset value, the first control is executed again to maintain the precise pulse control stage 303. The second preset value can be, for example, equal to 0.

[0083] Conversely, if the weight of the remaining materials to be packed is less than or equal to the second preset value within the second time period, the automated packing end stage 304 will begin.

[0084] At the end of the automated packing phase 304, the first conveying device can be controlled to remain stopped until the next automated packing begins.

[0085] In some embodiments, the material conveying device further includes a second conveying device configured to operate to convey material to the first conveying device. For example, the material conveying device includes multiple belt segments connected in sequence, the first conveying device being the last belt segment along the conveying direction of the multiple belt segments, and the second conveying device being one or more belt segments preceding the first conveying device. For example, the second conveying device may be all the belt segments preceding the first conveying device.

[0086] In these embodiments, in the first mode, the operating speed of the second conveying device can also be reduced to a preset speed during the second sub-control period.

[0087] It should be understood that after the operating speed of the second conveyor is reduced to the preset speed, the operating speed of the second conveyor will remain at the preset speed until the automated packing stage is completed.

[0088] After the stable accuracy phase 302 corresponding to the second sub-control is completed, the first conveying device enters the precise pulse control phase 303. During the precise pulse control phase 303, the first conveying device will intermittently stop operating. In this case, if the second conveying device continues to operate at its previous speed and conveys material to the first conveying device, this can easily lead to material accumulation and blockage on the first conveying device during the precise pulse control phase 303.

[0089] In the above embodiments, by controlling the operating speed of the second conveying device to be reduced to a preset speed in advance during the second sub-control period before the first control begins, the possibility of material accumulation and blockage on the first conveying device can be reduced.

[0090] As one implementation, the preset speed is equal to 0, that is, during the second sub-control period, the operating speed of the second conveying device is reduced to 0 (i.e., stopped). In this way, the possibility of material accumulation and blockage on the first conveying device can be further reduced.

[0091] As one implementation method, the operating speed of the second conveying device can be reduced to 0 at the end of a period of time after the start of the stable accuracy stage 302 corresponding to the second sub-control.

[0092] For example, this period could be 2 seconds. In this case, the operating speed of the second conveying device is controlled to decrease to 0 only after a 2-second delay from entering the stable accuracy stage 302.

[0093] By reducing the operating speed of the second conveyor to 0 only at the end of a certain period after the start of the second sub-control, rather than reducing it to 0 at the very beginning of the second sub-control, the first conveyor can continue to supply material for a period of time after the start of the stabilization phase 302. This further reduces the possibility of material accumulation and blockage on the first conveyor, while also preventing situations where the material on the first conveyor is insufficient to reach the target weight in the packaging box, thus ensuring the smooth completion of automated box packing.

[0094] In some embodiments, the control method for the material conveying device further includes a second mode.

[0095] In the second mode, a third control is executed to keep the first conveying device running until the difference is less than or equal to a second preset value.

[0096] Here, the third control includes a third sub-control and a fourth sub-control following the third sub-control, and the operating speed of the first conveying device during the fourth sub-control is less than the operating speed during the third sub-control.

[0097] The third control is similar to the second control; for details, please refer to the previous explanation of the second control, which will not be repeated here.

[0098] In other words, the second mode includes a rapid feeding stage, a stable accuracy stage, and an automated packing completion stage, but does not include a precise pulse control stage.

[0099] In these embodiments, the first mode is activated when the required packing accuracy is greater than or equal to a preset accuracy, and the second mode is activated when the required packing accuracy is less than the preset accuracy.

[0100] In the above embodiments, the first mode, which includes the first control, is activated only when a high packing accuracy is required, while the second mode, which does not include the first control, is activated when a lower packing accuracy is required. This can reduce processing pressure while meeting different packing accuracy requirements.

[0101] By performing automated packing tests on both the first and second modes, the results are shown in Tables 1 and 2 below. Table 1 shows the test results for the second mode, and Table 2 shows the test results for the first mode.

[0102] Table 1

[0103]

[0104]

[0105] Table 2

[0106]

[0107] As can be seen from Tables 1 and 2 above, the accuracy of automated packing in the second mode fluctuates between approximately 93.5% and 97.5%, while the accuracy of automated packing in the first mode is basically stable at 100%. In this case, if the required packing accuracy is less than 93.5%, the second mode can be used; conversely, if the required packing accuracy is greater than or equal to 93.5%, the first mode can be used.

[0108] This disclosure also provides a control device for a material conveying apparatus.

[0109] In some embodiments, the control device of the material conveying device includes a module configured to perform the control method of the material conveying device of any of the above embodiments.

[0110] In other embodiments, the control device of the material conveying device includes a memory and a processor coupled to the memory, the processor being configured to execute the control method of the material conveying device of any of the above embodiments based on instructions stored in the memory.

[0111] The following is combined Figure 4 and Figure 5 The control device of a material conveying apparatus according to some embodiments of the present disclosure will be described.

[0112] Figure 4 This is a schematic diagram of the structure of the control device of a material conveying apparatus according to some embodiments of the present disclosure.

[0113] like Figure 4 As shown, the control device 400 of the material conveying device includes an execution module 401.

[0114] The execution module 401 is configured to perform the first control when the difference between the target weight and the measured weight of the material in the packaging box is less than or equal to a first preset value.

[0115] Here, the first control is used to make the first conveying device run continuously for a first duration and then stop running for a second duration after running continuously for the first duration.

[0116] The execution module 401 is also configured to repeatedly execute the first control if the difference within the second time period is greater than the second preset value, until the difference within the second time period is less than or equal to the second preset value.

[0117] In other words, the execution module 401 can be configured to perform operations related to the precise pulsation control phase.

[0118] It should be understood that the control device 400 may also include various other modules (e.g., modules configured to perform operations related to the rapid feeding phase and operations related to the stabilization accuracy phase) to perform the control method of the material conveying device of any of the above embodiments.

[0119] Figure 5 This is a schematic diagram of the structure of the control device of a material conveying apparatus according to other embodiments of the present disclosure.

[0120] like Figure 5 As shown, the control device 500 includes a memory 501 and a processor 502 coupled to the memory 501. The processor 502 is configured to execute the control method of any of the above embodiments based on instructions stored in the memory 501.

[0121] The memory 501 may include, for example, system memory, fixed non-volatile storage media, etc. The system memory may store, for example, an operating system, application programs, a boot loader, and other programs.

[0122] The control device 500 may also include an input / output interface 503, a network interface 504, and a storage interface 505. These interfaces, such as the input / output interface 503, network interface 504, and storage interface 505, and the memory 501 and processor 502, can be connected via, for example, a bus 506. The input / output interface 503 provides a connection interface for input / output devices such as a monitor, mouse, keyboard, and touchscreen. The network interface 504 provides a connection interface for various networked devices. The storage interface 505 provides a connection interface for external storage devices such as SD cards and USB flash drives.

[0123] Figure 6 This is a schematic diagram of the structure of a packing system according to some embodiments of the present disclosure.

[0124] like Figure 6 As shown, the packing system includes a control device 601 (e.g., a control device 400 / 500) of the material conveying device of any of the above embodiments, and a material conveying device 602 of any of the above embodiments.

[0125] The packing system of this disclosure can be, but is not limited to, a packing machine or similar equipment.

[0126] This disclosure also provides a computer-readable storage medium including computer program instructions that, when executed by a processor, implement the control method of any of the above embodiments.

[0127] This disclosure also provides a computer program product, including a computer program that, when executed by a processor, implements the control method of any of the above embodiments.

[0128] The embodiments of this disclosure have now been described in detail. To avoid obscuring the concept of this disclosure, some details known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

[0129] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to mutually. For the apparatus and system embodiments, since they largely correspond to the method embodiments, the descriptions are relatively simple; relevant parts can be referred to the descriptions of the method embodiments.

[0130] Those skilled in the art will understand that embodiments of this disclosure can be provided as methods, systems, or computer program products. Therefore, this disclosure can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this disclosure can take the form of a computer program product embodied on one or more computer-usable non-transitory storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0131] This disclosure is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this disclosure. It should be understood that the functions specified in one or more flowchart illustrations and / or one or more blocks in a block diagram can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate functions for implementing the functions in the flowchart illustrations. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0132] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0133] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0134] While specific embodiments of this disclosure have been described in detail by way of examples, those skilled in the art should understand that the examples are for illustrative purposes only and not intended to limit the scope of this disclosure. Those skilled in the art should understand that modifications can be made to the above embodiments or equivalent substitutions can be made to some technical features without departing from the scope and spirit of this disclosure. The scope of this disclosure is defined by the appended claims.

Claims

1. A control method for a material conveying device, the material conveying device comprising a first conveying device configured to operate to convey material to a packaging box and a second conveying device configured to operate to convey material to the first conveying device, the method comprising, in a first mode: If the difference between the target weight and the measured weight of the material in the packaging box is less than or equal to a first preset value, a first control is executed. The first control is used to make the first conveying device run continuously for a first duration and stop running for a second duration after running continuously for the first duration. If the difference during the second time period of stopping the feeding of materials to the packaging box is greater than the second preset value, the first control is repeated until the difference during the second time period is less than or equal to the second preset value. Before the first control, a second control is executed until the difference is less than or equal to the first preset value. The second control is used to keep the first conveying device running continuously. The second control includes a first sub-control and a second sub-control following the first sub-control. The operating speed of the first conveying device during the second sub-control is less than the operating speed during the first sub-control. At the end of a certain period after the second sub-control begins, the operating speed of the second conveying device is reduced to a preset speed.

2. The method according to claim 1, wherein, The preset speed is equal to 0.

3. The method according to any one of claims 1-2, wherein, If the difference at the end of the second duration is greater than the second preset value, the first control is repeated until the difference at the end of the second duration is less than or equal to the second preset value.

4. The method according to any one of claims 1-2, wherein, The second preset value is equal to 0.

5. The method according to any one of claims 1-2, further comprising a second mode: The third control is executed until the difference is less than or equal to the second preset value. The third control is used to keep the first conveying device running continuously. The third control includes a third sub-control and a fourth sub-control following the third sub-control, and the operating speed of the first conveying device during the fourth sub-control is less than the operating speed during the third sub-control. The first mode is activated when the required packing accuracy is greater than or equal to the preset accuracy, and the second mode is activated when the packing accuracy is less than the preset accuracy.

6. A control device for a material conveying apparatus, comprising: A module configured to perform the control method of the material conveying device according to any one of claims 1-5.

7. A control device for a material conveying apparatus, comprising: Memory; as well as A processor coupled to the memory is configured to execute the control method of the material conveying device according to any one of claims 1-5 based on instructions stored in the memory.

8. A packing system, comprising: Control device for the material conveying device as described in claim 6 or 7; and The material conveying device.

9. A computer-readable storage medium comprising computer program instructions, wherein, When the computer program instructions are executed by the processor, they implement the control method of the material conveying device according to any one of claims 1-5.

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