Raw material position correction system and method

Abstract

The invention provides a raw material position correction system and method. The invention provides a raw material position correction system. The raw material position correction system comprises a detection unit, a control unit and an execution unit, the detection unit is used for detecting the edge position of a raw material every preset time to obtain edge position values, so that a plurality of continuous edge position values form an edge position value set, an intermediate value of the edge position values in the edge position value set is obtained, and the intermediate value is output to the control unit; the control unit is used for receiving the intermediate value and judging whether to send a deviation correction instruction to the execution unit or not according to an absolute value of a difference value between the intermediate value and the reference edge position value and a preset threshold value; and the execution unit is used for executing a corresponding deviation correction action on the raw materials after receiving the deviation correction instruction. According to the raw material position deviation rectifying system, the deviation rectifying efficiency can be improved, and the reject ratio of finished products can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of deviation correction systems, and in particular to a raw material position deviation correction system and method. Background Art

[0002] When raw materials are wound or stacked to make neat finished products during the production process, a correction system is usually required to correct the position of the raw materials. The main process of this correction includes identifying the position deviation through the sensor in the detection link of the correction system, notifying the control mechanism, and the control mechanism issuing instructions to perform correction actions, so that the position of the raw materials is not deviated after they reach the designated area. When a protruding label appears in the raw material, the sensor will mistakenly believe that the material has a position deviation, thereby notifying the control mechanism to issue an execution instruction to perform a correction action, which will cause the raw materials with labels to be uneven after being made into finished products, resulting in defective products. The existing correction method requires targeted processing of the raw materials before they pass through the correction system, and additional sensors need to be added to the correction system to identify the labeled raw materials, which reduces the correction efficiency. In addition, when a large section of raw materials with labels is offset, the correction operation cannot be performed on the section of raw materials, resulting in a high defect rate of finished products. Summary of the invention

[0003] The object of the present invention is to provide a raw material position correction system and method to solve the technical problems of low correction efficiency and high defective rate of finished products in the prior art.

[0004] The technical solution of the present invention is as follows: a raw material position correction system is provided, including a detection unit, a control unit and an execution unit;

[0005] The detection unit is used to detect the edge position of the raw material at a preset time interval to obtain an edge position value, so that a plurality of consecutive edge position values ​​form an edge position value set, obtain an intermediate value of the edge position values ​​in the edge position value set, and output the intermediate value to the control unit;

[0006] The control unit is used to receive the intermediate value, and determine whether to send a correction instruction to the execution unit according to an absolute value of a difference between the intermediate value and the reference edge position value and a preset threshold value;

[0007] The execution unit is used to perform corresponding correction actions on the raw material after receiving the correction instruction.

[0008] Furthermore, the detection unit is also used to, after outputting the intermediate value to the control unit, remove the earliest detected edge position value in the edge position value set, add the latest detected edge position value to the edge position value set, re-obtain the intermediate value of the edge position values ​​in the edge position value set, and output the updated intermediate value; the control unit is also used to, after determining whether to send a correction instruction to the execution unit, re-determine whether to send a correction instruction to the execution unit based on the absolute value of the difference between the updated intermediate value and the reference edge position value and a preset threshold.

[0009] Furthermore, the detection unit is also used to sort all edge position values ​​in the edge position value set according to size to obtain a sorted edge position value set. If the number of edge position values ​​in the edge position value set is an odd number, the middle edge position value of the sorted edge position value set is used as the middle value of the edge position values ​​in the edge position value set.

[0010] Furthermore, the detection unit is also used to, if the number of edge position values ​​in the edge position value set is an even number, use the average of the two edge position values ​​in the middle of the sorted edge position value set as the middle value of the edge position values ​​in the edge position value set.

[0011] Further, the control unit determines whether to send a correction instruction to the execution unit according to the absolute value of the difference between the intermediate value and the reference edge position value and a preset threshold value, including:

[0012] If the absolute value of the difference between the intermediate value and the reference edge position value is greater than a preset threshold, a correction instruction is sent to the execution unit; otherwise, no correction instruction is sent to the execution unit.

[0013] Another technical solution of the present invention is as follows, providing a method for correcting the position of a raw material, comprising:

[0014] Detecting the edge position of the raw material at preset intervals to obtain an edge position value, so that a plurality of consecutive edge position values ​​form an edge position value set, obtaining an intermediate value of the edge position values ​​in the edge position value set, and outputting the intermediate value;

[0015] receiving the intermediate value, and determining whether to send a correction instruction according to an absolute value of a difference between the intermediate value and the reference edge position value and a preset threshold;

[0016] After receiving the deviation correction instruction, a corresponding deviation correction action is performed on the raw material.

[0017] Furthermore, after outputting the intermediate value, it also includes removing the earliest detected edge position value in the edge position value set, adding the latest detected edge position value to the edge position value set, re-obtaining the intermediate value of the edge position values ​​in the edge position value set, and outputting the updated intermediate value; after determining whether to send a correction instruction, it also includes re-determining whether to send a correction instruction based on the absolute value of the difference between the updated intermediate value and the benchmark edge position value and a preset threshold.

[0018] Further, obtaining the middle value of the edge position value in the edge position value set includes:

[0019] All edge position values ​​in the edge position value set are sorted according to size to obtain a sorted edge position value set; if the number of edge position values ​​in the edge position value set is an odd number, the middle edge position value of the sorted edge position value set is used as the middle value of the edge position values ​​in the edge position value set.

[0020] Furthermore, the raw material position correction method also includes, if the number of edge position values ​​in the edge position value set is an even number, taking the average of the two edge position values ​​in the middle of the sorted edge position value set as the middle value of the edge position values ​​in the edge position value set.

[0021] Further, judging whether to send a deviation correction instruction according to the absolute value of the difference between the intermediate value and the reference edge position value and a preset threshold value includes:

[0022] If the absolute value of the difference between the intermediate value and the reference edge position value is greater than a preset threshold, a correction instruction is sent; otherwise, no correction instruction is sent.

[0023] The beneficial effects of the present invention are as follows: the detection unit is used to detect the edge position of the raw material at preset time intervals to obtain the edge position value, so that a plurality of consecutive edge position values ​​form an edge position value set, obtain the intermediate value of the edge position values ​​in the edge position value set, and output the intermediate value to the control unit; the control unit is used to receive the intermediate value, and judge whether to send a correction instruction to the execution unit according to the absolute value of the difference between the intermediate value and the reference edge position value and a preset threshold; the execution unit is used to perform corresponding correction actions on the raw material after receiving the correction instruction; the above technical scheme does not require targeted processing of the raw material before it passes through the correction system, thereby improving the correction efficiency. When a large section of raw material with a label is positionally offset, the correction operation can still be performed on the raw material, thereby reducing the defective rate of the finished product. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A first structural schematic diagram of a raw material position correction system provided by an embodiment of the present invention;

[0025] Figure 2 A second structural schematic diagram of the raw material position correction system provided by an embodiment of the present invention;

[0026] Figure 3 A third structural schematic diagram of the raw material position correction system provided by an embodiment of the present invention;

[0027] Figure 4 A schematic diagram of an edge position value detected by a detection unit provided in an embodiment of the present invention;

[0028] Figure 5 A schematic flow chart of a method for correcting raw material position provided in an embodiment of the present invention.

[0029] Reference numerals: 10 - control unit; 21 - execution unit; 22 - first connection cable; 31 - detection unit; 32 - second connection cable; 41 - raw material; 42 - label. DETAILED DESCRIPTION

[0030] 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.

[0031] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0032] Figure 1 1 is a first structural diagram of the raw material position correction system of the embodiment of the present invention. It should be noted that if there is substantially the same result, the raw material position correction system of the present invention is not based on Figure 1 The structure shown is limited. Figure 1 As shown, the raw material position correction system includes a detection unit 31, a control unit 10 and an execution unit 21;

[0033] The detection unit 31 is used to detect the edge position of the raw material 41 at a preset time interval to obtain an edge position value, so that a plurality of consecutive edge position values ​​form an edge position value set, obtain an intermediate value of the edge position values ​​in the edge position value set, and output the intermediate value to the control unit 10;

[0034] The control unit 10 is used to receive the intermediate value, and determine whether to send a correction instruction to the execution unit 21 according to the absolute value of the difference between the intermediate value and the reference edge position value and a preset threshold value;

[0035] The execution unit 21 is used to perform a corresponding correction action on the raw material 41 after receiving the correction instruction.

[0036] In a specific embodiment, the corresponding correction action is performed on the raw material 41, which can be a correction action of a corresponding displacement amount is performed on the raw material 41. A second structural diagram of the raw material position correction system is shown in FIG. Figure 2 As shown, Figure 2 is a top view of the raw material position correction system, and a third structural schematic diagram of the raw material position correction system, such as Figure 3 As shown, Figure 3 This is the front view of the raw material position correction system; Figure 2 and Figure 3 The system includes a control unit 10, an execution unit 21, a first connection cable 22, a detection unit 31, a second connection cable 32, a raw material 41, and a label 42 of the raw material 41. Figure 2 and Figure 3 The middle arrow indicates the conveying direction of the raw material 41 , and the conveying direction of the raw material 41 may be from left to right.

[0037] In some embodiments, the detection unit 31 is also used to sort all edge position values ​​in the edge position value set according to size to obtain a sorted edge position value set. If the number of edge position values ​​in the edge position value set is an odd number, the middle edge position value of the sorted edge position value set is used as the middle value of the edge position values ​​in the edge position value set.

[0038] In a specific embodiment, all edge position values ​​in the edge position value set are sorted according to size to obtain a sorted edge position value set. Without loss of generality, the size of the edge position value set is set to N, that is, the edge position value set may include N edge position values. When N is an odd number, the middle value is the edge position value ranked at the (N+1) / 2th position in the sorted edge position value set.

[0039] In some embodiments, the detection unit 31 is also used to, if the number of edge position values ​​in the edge position value set is an even number, use the average of the two edge position values ​​in the middle of the sorted edge position value set as the middle value of the edge position values ​​in the edge position value set.

[0040] In a specific embodiment, when the size N of the edge position value set is an even number, the average of the two edge position values ​​in the middle of the sorted edge position value set, that is, the value obtained by adding the edge position value at the N / 2th position and the edge position value at the N / 2+1th position and dividing by 2, is used as the middle value.

[0041] In some embodiments, the detection unit 31 is also used to, after outputting the intermediate value to the control unit 10, remove the earliest detected edge position value in the edge position value set, add the latest detected edge position value to the edge position value set, re-obtain the intermediate value of the edge position values ​​in the edge position value set, and output the updated intermediate value; the control unit 10 is also used to, after determining whether to send a correction instruction to the execution unit 21, re-determine whether to send a correction instruction to the execution unit 21 based on the absolute value of the difference between the updated intermediate value and the reference edge position value and a preset threshold.

[0042] In a specific embodiment, the edge position value detected the most recently may be the edge position value corresponding to the next detection time of the latest detection time (detection cycle) in the original edge position value set. Figure 4 As shown, Figure 4 Among them, v1~v11 can be the edge position values ​​detected by the detection unit 31 in the first 11 detection cycles (detection moments) when the raw material 41 passes through the detection unit 31; v12~v16 can be the edge position values ​​detected by the detection unit 31 in the middle 5 cycles when the label 42 of the raw material 41 passes through the detection range of the detection unit 31; v17~v27 can be the edge position values ​​detected by the detection unit 31 in the last 11 detection cycles when the raw material 41 passes through the detection unit 31.

[0043] In a specific embodiment, without loss of generality, the size N of the edge position value set is set to 11, then the initial edge position value set includes edge position values ​​v1 to v11, the edge position values ​​v1 to v11 are sorted to obtain a sorted edge position value set, the edge position value at the middle position in the sorted edge position value set is output to the control unit 10 as the middle value, and then the edge position value v1 can be moved out of the edge position value set. When the tag 42 enters the detection range of the detection unit 31, the instant edge position value (the latest detected edge position) is v12. At this time, the values ​​existing in the edge position value set are v2 to v12, and they are sorted. , the value of the middle position will be generated in v2~v11. After the middle value is output, v2 is moved out of the edge position value set; when the immediate edge position value is v13, at this time, the values ​​in the edge position value set are v3~v13, which are sorted, and the middle value is generated in v3~v11. After the middle value is output, v3 is moved out of the edge position value set; and so on, when the immediate edge position value is v16, the values ​​in the edge position value set are v6~v16. They are sorted, and the middle value is generated in v6~v11. After the middle value is output, v6 is moved out of the edge position value set; after the label 42 passes the detection unit 31, the immediate edge position value is v 17, at this time, the values ​​in the edge position value set are v7~v17, and they are sorted. The middle values ​​are generated in v7, v8, v9, v10, v11, and v17. After the middle value is output, v7 is removed from the edge position value set; when the immediate edge position value is v18, the values ​​in the edge position value set are v8~v18, and they are sorted. The middle values ​​are generated in v8, v9, v10, v11, v17, and v18. After the middle value is output, v8 is removed from the edge position value set; and so on, when the immediate edge position value is v26, the values ​​in the edge position value set are v16~v26, and they are sorted. The middle values ​​are generated in v17, v1 8, v19, v20, v21, v22, v23, v24, v25, and v26 are generated, and after the intermediate value is output, v16 is moved out of the edge position value set; during the entire period when the label 42 passes through the detection unit 31, the edge position value (v12, v13, v14, v15, and v16) corresponding to the label 42 enters the edge position value set and is completely moved out of the edge position value set, and the output intermediate value does not include any edge position value (v12, v13, v14, v15, and v16) of the label 42, that is, the edge position value of the label 42 is filtered out, so that the correction action will not be performed incorrectly due to the protrusion of the label 42. It should be noted that the appropriate edge position value set size needs to be set according to the size (width) of the label 42. The larger the size of the label 42, the larger the size of the edge position value set should be.

[0044] In some embodiments, the control unit 10 determines whether to send a correction instruction to the execution unit 21 according to the absolute value of the difference between the intermediate value and the reference edge position value and a preset threshold value, including:

[0045] If the absolute value of the difference between the intermediate value and the reference edge position value is greater than a preset threshold, a correction instruction is sent to the execution unit 21 ; otherwise, no correction instruction is sent to the execution unit 21 .

[0046] In a specific embodiment, when the absolute value of the difference between the intermediate value and the reference edge position value is greater than a preset threshold, and the intermediate value is greater than the reference edge position value, it indicates that the raw material 41 is protruding at the position corresponding to the intermediate value; when the absolute value of the difference between the intermediate value and the reference edge position value is greater than the preset threshold, and the intermediate value is less than the reference edge position value, it indicates that the raw material 41 is concave at the position corresponding to the intermediate value.

[0047] The raw material position correction system provided by the embodiment of the present invention, the detection unit 31 is used to detect the edge position of the raw material 41 at preset time intervals to obtain the edge position value, so that a plurality of consecutive edge position values ​​form an edge position value set, obtain the intermediate value of the edge position values ​​in the edge position value set, and output the intermediate value to the control unit 10; the control unit 10 is used to receive the intermediate value, and judge whether to send a correction instruction to the execution unit 21 according to the absolute value of the difference between the intermediate value and the reference edge position value and a preset threshold value; the execution unit 21 is used to perform corresponding correction actions on the raw material 41 after receiving the correction instruction; there is no need to perform targeted processing on the raw material 41 before it passes through the correction system, nor is there any need to add additional sensors to identify the raw material 41 with the label 42, thereby improving the correction efficiency, and when a large section of the raw material 41 with the label 42 is positionally offset, the correction operation can still be performed on the raw material 41, thereby reducing the defective rate of the finished product.

[0048] The embodiment of the present invention provides a method for correcting the position of raw materials, and its flow chart is as follows: Figure 5 As shown, the raw material position correction method includes:

[0049] S501, detecting the edge position of the raw material at a preset time interval to obtain an edge position value, so that a plurality of consecutive edge position values ​​form an edge position value set, obtaining an intermediate value of the edge position values ​​in the edge position value set, and outputting the intermediate value;

[0050] S502, receiving the intermediate value, and determining whether to send a correction instruction according to an absolute value of a difference between the intermediate value and the reference edge position value and a preset threshold;

[0051] S503: After receiving the deviation correction instruction, perform corresponding deviation correction actions on the raw material.

[0052] In some embodiments, after outputting the intermediate value, it also includes removing the earliest detected edge position value in the edge position value set, adding the latest detected edge position value to the edge position value set, re-obtaining the intermediate value of the edge position values ​​in the edge position value set, and outputting the updated intermediate value; after determining whether to send a correction instruction, it also includes re-determining whether to send a correction instruction based on the absolute value of the difference between the updated intermediate value and the benchmark edge position value and a preset threshold.

[0053] In some embodiments, obtaining the middle value of the edge position values ​​in the edge position value set includes:

[0054] All edge position values ​​in the edge position value set are sorted according to size to obtain a sorted edge position value set; if the number of edge position values ​​in the edge position value set is an odd number, the middle edge position value of the sorted edge position value set is used as the middle value of the edge position values ​​in the edge position value set.

[0055] In some embodiments, the raw material position correction method also includes: if the number of edge position values ​​in the edge position value set is an even number, then taking the average of the two edge position values ​​in the middle of the sorted edge position value set as the middle value of the edge position values ​​in the edge position value set.

[0056] In some embodiments, judging whether to send a correction instruction according to the absolute value of the difference between the intermediate value and the reference edge position value and a preset threshold value includes:

[0057] If the absolute value of the difference between the intermediate value and the reference edge position value is greater than a preset threshold, a correction instruction is sent; otherwise, no correction instruction is sent.

[0058] The raw material position correction method provided by the embodiment of the present invention detects the edge position of the raw material at preset time intervals to obtain an edge position value, so that a plurality of consecutive edge position values ​​form an edge position value set, obtains the middle value of the edge position values ​​in the edge position value set, and outputs the middle value; receives the middle value, and determines whether to send a correction instruction based on the absolute value of the difference between the middle value and the reference edge position value and a preset threshold value; after receiving the correction instruction, performs corresponding correction actions on the raw material; there is no need to perform targeted processing on the raw material before it passes through the correction system, nor is there any need to add additional sensors to identify the raw material with a label, thereby improving the correction efficiency. When a large section of the raw material with a label is positionally offset, the correction operation can still be performed on the raw material, thereby reducing the defective rate of the finished product.

[0059] The technical features of the above embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0060] The above embodiments only express the preferred implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A raw material position correction system, characterized in that: It includes a detection unit, a control unit and an execution unit; The detection unit is used to detect the edge position of the raw material at a preset time interval to obtain an edge position value, so that a plurality of consecutive edge position values ​​form an edge position value set, obtain an intermediate value of the edge position values ​​in the edge position value set, and output the intermediate value to the control unit; The control unit is used to receive the intermediate value, and determine whether to send a correction instruction to the execution unit according to an absolute value of a difference between the intermediate value and the reference edge position value and a preset threshold value; The execution unit is used to perform corresponding correction actions on the raw material after receiving the correction instruction.

2. The raw material position correction system according to claim 1, characterized in that: The detection unit is also used to, after outputting the intermediate value to the control unit, remove the earliest detected edge position value in the edge position value set, add the latest detected edge position value to the edge position value set, re-obtain the intermediate value of the edge position values ​​in the edge position value set, and output the updated intermediate value; the control unit is also used to, after determining whether to send a correction instruction to the execution unit, re-determine whether to send a correction instruction to the execution unit based on the absolute value of the difference between the updated intermediate value and the reference edge position value and a preset threshold.

3. The raw material position correction system according to claim 1, characterized in that: The detection unit is also used to sort all edge position values ​​in the edge position value set according to size to obtain a sorted edge position value set; if the number of edge position values ​​in the edge position value set is an odd number, then the middle edge position value of the sorted edge position value set is used as the middle value of the edge position values ​​in the edge position value set.

4. The raw material position correction system according to claim 1, characterized in that: The detection unit is further configured to, if the number of edge position values ​​in the edge position value set is an even number, use an average of two edge position values ​​in the middle of the sorted edge position value set as a middle value of the edge position values ​​in the edge position value set.

5. The raw material position correction system according to claim 1, characterized in that: The control unit determines whether to send a correction instruction to the execution unit according to the absolute value of the difference between the intermediate value and the reference edge position value and a preset threshold value, including: If the absolute value of the difference between the intermediate value and the reference edge position value is greater than a preset threshold, a correction instruction is sent to the execution unit; otherwise, no correction instruction is sent to the execution unit.

6. A method for correcting the position of raw materials, characterized in that: include: Detecting the edge position of the raw material at preset intervals to obtain an edge position value, so that a plurality of consecutive edge position values ​​form an edge position value set, obtaining an intermediate value of the edge position values ​​in the edge position value set, and outputting the intermediate value; receiving the intermediate value, and determining whether to send a correction instruction according to an absolute value of a difference between the intermediate value and the reference edge position value and a preset threshold; After receiving the deviation correction instruction, a corresponding deviation correction action is performed on the raw material.

7. The method for correcting the position of raw materials according to claim 6, characterized in that: After outputting the intermediate value, the method further includes removing the earliest detected edge position value in the edge position value set, adding the latest detected edge position value to the edge position value set, reacquiring the intermediate value of the edge position values ​​in the edge position value set, and outputting the updated intermediate value; After determining whether to send the correction instruction, the method further includes re-determining whether to send the correction instruction based on the absolute value of the updated difference between the intermediate value and the reference edge position value and a preset threshold.

8. The method for correcting the position of raw materials according to claim 6, characterized in that: Obtaining the middle value of the edge position values ​​in the edge position value set includes: All edge position values ​​in the edge position value set are sorted according to size to obtain a sorted edge position value set; if the number of edge position values ​​in the edge position value set is an odd number, the middle edge position value of the sorted edge position value set is used as the middle value of the edge position values ​​in the edge position value set.

9. The method for correcting the position of raw materials according to claim 8, characterized in that: It also includes that if the number of edge position values ​​in the edge position value set is an even number, an average value of two edge position values ​​in the middle of the sorted edge position value set is used as the middle value of the edge position values ​​in the edge position value set.

10. The method for correcting the position of raw materials according to claim 6, characterized in that: According to the absolute value of the difference between the intermediate value and the reference edge position value and a preset threshold, determining whether to send a correction instruction includes: If the absolute value of the difference between the intermediate value and the reference edge position value is greater than a preset threshold, a correction instruction is sent; otherwise, no correction instruction is sent.

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