Tobacco cutter row chain deviation detection method and system and storage medium

Abstract

The invention provides a tobacco cutter row chain deviation detection method and system and a storage medium, belongs to the technical field of tobacco processing, and is used for solving the monitoring problem of row chain deviation. The invention provides a tobacco cutter row chain deviation detection method, which comprises the following steps of: respectively acquiring initial distances between three point positions A, B and C and a row chain, establishing a calibration triangle, and acquiring a calibration gravity center of the calibration triangle; sampling distances between the A, B and C point locations and the row chain are obtained, a sampling triangle is established, and the sampling gravity center of the sampling triangle is obtained; establishing a plane vector by taking the calibration gravity center as a starting point and the sampling gravity center as an end point; judging whether the row chain deviates or not according to the sampling distance and the model of the plane vector; if it is judged that the row chain deviates, the deviation type of the row chain is determined according to the position of the sampling gravity center in the reference coordinate system. The method can accurately judge the deviation condition of the row chain, has the advantages of good real-time performance and high accuracy, and provides a basis for maintenance and adjustment of the row chain.

Description

Technical Field

[0001] The invention belongs to the technical field of tobacco processing, and in particular relates to a method, system and storage medium for detecting chain deviation of a shredder. Background Art

[0002] Tobacco shredding is an important part of tobacco processing. Tobacco is transported to the knife entrance by the upper and lower chains of the shredder, and the knife roller body with cutters evenly arranged rotates to cut the tobacco into qualified shreds. The chain is driven by the front and rear drive rollers to make a rotary motion. Whether the chain runs smoothly is one of the important factors affecting whether the shred width can meet the standard. However, with the long-term use of the shredder, the chain will inevitably deviate. Once the chain deviates, it will affect the conveying effect of tobacco materials at the least, and in severe cases, it will cause the chain and the side plate to gnaw each other, causing equipment damage. If it is not discovered in time, it may cause equipment shutdown and affect production. Since the chain is a non-consumable item, maintenance personnel have long checked whether it is deviated during regular chain maintenance. Therefore, there will be situations where the chain deviation is not checked in time or the judgment is inaccurate. Summary of the invention

[0003] Therefore, the technical problem to be solved by the present invention is to provide a method, system and storage medium for detecting chain deviation of a wire cutting machine, which can monitor the chain operation status at any time and monitor the deviation phenomenon, providing a basis for maintenance personnel to perform maintenance as soon as possible.

[0004] In a first aspect, the present invention provides a method for detecting deviation of a chain of a wire cutting machine, comprising the following steps:

[0005] The initial distances X1, Y2, and X3 between the three points A, B, and C and the row chain are obtained respectively; wherein, the two points A and B are located on the left and right sides of the running direction of the row chain respectively, and the point C and the point A are located on the same side of the row chain and there is a gap between the point C and the point A in the running direction of the row chain;

[0006] Convert the initial distances X1, Y2, and X3 into a plane rectangular coordinate system to form three initial coordinate points (X1, 0), (0, Y2), and (-X3, 0);

[0007] Using the three initial coordinate points as vertices, a calibration triangle is established, and the calibration center of gravity O(X0, Y0) of the calibration triangle is obtained;

[0008] Periodically obtain the sampling distances X1', Y2', and X3' between the three points A, B, and C and the row chain;

[0009] The sampling distances X1', Y2', and X3' are converted into a plane rectangular coordinate system to form three sampling coordinate points (X1', 0), (0, Y2'), and (-X3', 0);

[0010] Take the three sampling coordinate points as vertices, establish a sampling triangle, and obtain the sampling center of gravity O'(X c , Y c );

[0011] Take the calibration center O(X0, Y0) as the starting point and the sampling center O'(X c , Y c ) as the end point, establish the plane vector OO', and obtain the modulus of the plane vector OO';

[0012] Take the calibration center of gravity O(X0, Y0) as the origin, establish the reference coordinate system, and obtain the sampling center of gravity O'(X c , Y c )’s position in the reference coordinate system;

[0013] Determine whether the chain is deviating based on the sampling distances X1', Y2', X3', and the modulus of the plane vector OO'; if the chain is deviating, c , Y c )’s position in the reference coordinate system determines the type of chain deviation.

[0014] Optionally, the coordinates of the calibration center of gravity O of the calibration triangle are (X0, Y0), where:

[0015] X0=[X1+(-X3)] / 3 (1)

[0016] Y0=Y2 / 3 (2)

[0017] Optionally, the coordinates of the sampling center O' of the sampling triangle are (X c , Y c ),in:

[0018] X c =[X1'+(-X3')] / 3 (3)

[0019] Y c =Y2' / 3 (4)

[0020] Optionally, the magnitude of the plane vector OO' is:

[0021]

[0022] Optionally, a reference coordinate system is established with the calibration center of gravity O(X0, Y0) as the origin, and the sampling center of gravity O'(X c , Y c ) in the reference coordinate system; including:

[0023] Establish a reference coordinate system with the calibrated center of gravity O (X0, Y0) as the origin;

[0024] The reference coordinate system is divided into the first to fourth reference quadrants using the horizontal and vertical axes of the reference coordinate system as dividing lines;

[0025] By comparing X c With X o The value of Y C With Y o The numerical value of the sample is used to determine the sampling center of gravity O'(X c , Y c ) in the reference coordinate system.

[0026] Optionally, judging whether the row chain is deviated according to the sampling distances X1', Y2', X3' and the modulus of the plane vector OO'; including:

[0027] Set the distance thresholds between the three points A, B, and C and the chain. When any sampling distance X1', Y2', or X3' reaches the distance threshold, it is determined that the chain has deviated.

[0028] The modulus threshold of the plane vector OO' is set. When the actual value of the modulus of the plane vector OO' is greater than the modulus threshold, it is determined that the chain has deviated.

[0029] Optionally, if it is determined that the chain is deviated, the sampling center of gravity O'(X c , Y c ) determines the type of deviation of the chain in the reference coordinate system; including:

[0030] Establish all types of deviation of the chain: parallel deviation to the left, parallel deviation to the right, inclined deviation to the left, inclined deviation to the right;

[0031] Get the sampling center of gravity O' when the extreme deviation occurs under each deviation type 极限 Position in the reference coordinate system;

[0032] Get the plane vector OO' when the extreme deviation occurs under each deviation type 极限 Modulus: |OO' 极限 | 左平 、|OO' 极限 | 右平 、|OO' 极限 | 左斜 、|OO' 极限 | 右斜 ;

[0033] According to the sampling center O'(X c , Y c ) in the reference coordinate system to determine the type of deviation of the chain, and compare the magnitude of the plane vector OO' with the plane vector OO' corresponding to the deviation type 极限 The model is used to determine whether the chain exceeds the deviation limit.

[0034] In the second aspect, the present invention provides a wire cutting machine chain deviation detection system, including: a detection module, a conversion module, a control module and a human-computer interaction module; the detection module is used to obtain the initial distances X1, Y2, and X3 between the three points A, B, and C and the chain, and periodically obtain the sampling distances X1', Y2', and X3' between the three points A, B, and C and the chain; the conversion module is used to convert the distance signal obtained by the detection module into an electrical signal, and input it into the control module; the control module can process the electrical signal, and calculate whether the chain is deviated, and determine the type of deviation; the human-computer interaction module is connected to the control module; the human-computer interaction module is used to display the calculation results of the control module.

[0035] Optionally, the detection module includes: a first eddy current sensor, a second eddy current sensor and a third eddy current sensor; the first eddy current sensor and the second eddy current sensor are respectively arranged on the left and right sides of the running direction of the chain row; the third eddy current sensor and the first eddy current sensor are located on the same side of the chain row, and the third eddy current sensor and the first eddy current sensor are spaced apart in the running direction of the chain row.

[0036] In a third aspect, the present invention provides a storage medium having a computer program stored thereon, which implements the above-mentioned method for detecting chain deviation of a wire cutting machine when the computer program is executed by a processor.

[0037] Beneficial Effects

[0038] The wire cutting machine chain deviation detection method, system and storage medium provided by the present invention can monitor the running status of the chain in real time and accurately judge the deviation condition of the chain, and has the advantages of good real-time performance and high accuracy, providing a basis for the maintenance and adjustment of the chain. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 A flow chart of a method for detecting chain deviation of a wire cutting machine according to an embodiment of the present invention;

[0040] Figure 2 A flow chart of a method for detecting chain deviation of a wire cutting machine according to another embodiment of the present invention;

[0041] Figure 3 A flow chart of a method for detecting chain deviation of a wire cutting machine according to another embodiment of the present invention;

[0042] Figure 4 A flow chart of a method for detecting chain deviation of a wire cutting machine according to another embodiment of the present invention;

[0043] Figure 5 A schematic diagram of a reference coordinate system of an embodiment provided by the present invention;

[0044] Figure 6 A schematic diagram of the distribution of three points A, B and C of an embodiment provided by the present invention;

[0045] Figure 7 This is a schematic diagram of the chain running parallel to the left;

[0046] Figure 8 This is a schematic diagram of the chain running parallel to the right;

[0047] Fig. 9 This is a schematic diagram of the chain shifting to the left;

[0048] Fig.10 This is a schematic diagram of the chain shifting to the left;

[0049] Fig.11 To obtain the modulus of the plane vector OO' and the sampling center of gravity O'(X c , Y c ) in a reference coordinate system;

[0050] Fig.12 A flow chart to determine whether the chain is deviating;

[0051] Fig.13 A schematic diagram of a chain deviation detection system for a wire cutting machine according to an embodiment of the present invention;

[0052] Fig.14 A schematic diagram of a human-computer interaction module displaying calculation results according to an embodiment of the present invention. DETAILED DESCRIPTION

[0053] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" 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, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0054] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0055] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0056] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0057] In a first aspect, this embodiment provides a method for detecting chain deviation of a wire cutting machine. Figure 1 A flow chart of a method for detecting chain deviation of a wire cutting machine provided in this embodiment.

[0058] like Figure 1 As shown, the wire cutting machine chain deviation detection method of this embodiment includes the following steps:

[0059] S1. Obtain the initial distances X1, Y2, and X3 between the three points A, B, and C and the row chain respectively; wherein the two points A and B are located on the left and right sides of the running direction of the row chain respectively, and the point C and the point A are located on the same side of the row chain and there is a gap between the point C and the point A in the running direction of the row chain;

[0060] Specifically, Figure 6 A schematic diagram of the distribution of three points A, B, and C provided in this embodiment. In some examples, such as Figure 6 As shown, points A and B are located on the left and right sides of the running direction of the chain and close to the front end of the chain. Point C is located on the same side of the chain as point A and close to the rear end of the chain.

[0061] For example, see Figure 6 Points A and B are located on both sides of the front driving roller of the chain respectively, and point C is located on one side of the rear driven roller of the chain and is on the same side of the chain as point A.

[0062] The initial distances X1, Y2, and X3 are the distances between the three points A, B, and C and the chain arrangement when the chain arrangement does not deviate.

[0063] S2. Convert the initial distances X1, Y2, and X3 into a plane rectangular coordinate system to form three initial coordinate points (X1, 0), (0, Y2), and (-X3, 0);

[0064] Specifically, in the plane rectangular coordinate system, the initial coordinate point (X1, 0) is located on the positive half axis of the X axis, the initial coordinate point (0, Y2) is located on the positive half axis of the Y axis, and the initial coordinate point (-X3, 0) is located on the negative half axis of the X axis.

[0065] S3. Establish a calibration triangle with the three initial coordinate points as vertices, and obtain the calibration center of gravity O (X0, Y0) of the calibration triangle;

[0066] Specifically, in a plane rectangular coordinate system, given the coordinates of the three vertices of the calibration triangle, the coordinates of the calibration centroid can be calculated by arithmetic mean method.

[0067] S4. Periodically obtain the sampling distances X1', Y2', and X3' between the three points A, B, and C and the row chain;

[0068] Specifically, the sampling period can be set according to actual use requirements, and this embodiment does not impose too many restrictions on this. For example, the sampling period is 5s.

[0069] S5. Convert the sampling distances X1', Y2', and X3' into a rectangular coordinate system to form three sampling coordinate points (X1', 0), (0, Y2'), and (-X3', 0);

[0070] Specifically, in the plane rectangular coordinate system, the sampling coordinate point (X1', 0) is located on the positive half axis of the X axis, the sampling coordinate point (0, Y2') is located on the positive half axis of the Y axis, and the sampling coordinate point (-X3', 0) is located on the negative half axis of the X axis.

[0071] S6. Using the three sampling coordinate points as vertices, establish a sampling triangle and obtain the sampling center of gravity O'(X c , Y c );

[0072] Specifically, in a plane rectangular coordinate system, given the coordinates of the three vertices of the sampling triangle, the coordinates of the sampling centroid can be calculated by arithmetic averaging.

[0073] S7. Take the calibration center O(X0, Y0) as the starting point and the sampling center O'(X c , Y c ) as the end point, establish the plane vector OO', and obtain the modulus of the plane vector OO';

[0074] Specifically, the modulus of the plane vector OO' is the difference between the calibration center of gravity O(X0, Y0) and the sampling center of gravity O'(X c , Y c ), so it can be used as an important parameter to determine whether the chain is deviating.

[0075] S8. Take the calibration center of gravity O(X0, Y0) as the origin, establish a reference coordinate system, and obtain the sampling center of gravity O'(X c , Y c )’s position in the reference coordinate system;

[0076] Specifically, Figure 5 Schematic diagram of a reference coordinate system provided in this embodiment. The reference coordinate system takes the calibration center of gravity O(X0, Y0) as the origin, and is based on the calibration center of gravity O(X0, Y0) and the sampling center of gravity O'(X c , Y c ) can obtain the sampling center of gravity O'(X c , Y c )’s position coordinates in the reference coordinate system.

[0077] S9. Determine whether the row chain is deviated according to the sampling distance X1', Y2', X3', and the modulus of the plane vector OO'; if the row chain is deviated, then c , Y c )’s position in the reference coordinate system determines the type of chain deviation.

[0078] Specifically, according to the sampling center of gravity O'(X c , Y c ) After the type of deviation of the chain is determined by the position in the reference coordinate system, it is convenient for maintenance personnel to calibrate and adjust the chain.

[0079] The wire cutting machine chain deviation detection method of this embodiment can monitor the running status of the chain in real time and accurately judge the deviation of the chain, has the advantages of good real-time performance and high accuracy, and provides a basis for the maintenance and adjustment of the chain.

[0080] In some embodiments, the coordinates of the calibration center of gravity O of the calibration triangle are (X0, Y0), where:

[0081] X0=[X1+(-X3)] / 3 (1)

[0082] Y0=Y2 / 3 (2)

[0083] Specifically, the coordinates of the three vertices of the calibration triangle are (X1, 0), (0, Y2), and (-X3, 0). The coordinates of the calibration center of gravity can be obtained by the arithmetic mean method:

[0084] X0=[X1+0+(-X3)] / 3=[X1+(-X3)] / 3;

[0085] Y0=(0+Y2+0) / 3=Y2 / 3.

[0086] In some embodiments, the coordinates of the sampling center O' of the sampling triangle are (X c , Y c ),in:

[0087] X c =[X1'+(-X3')] / 3 (3)

[0088] Y c =Y2' / 3 (4)

[0089] Specifically, the coordinates of the three vertices of the sampling triangle are (X1', 0), (0, Y2'), and (-X3', 0). The coordinates of the sampling centroid can be calculated using the arithmetic mean method:

[0090] X c =[X1'+0+(-X3')] / 3=[X1'+(-X3')] / 3;

[0091] Y c =(0+Y2'+0) / 3=Y2' / 3.

[0092] In some embodiments, the magnitude of the plane vector OO' is:

[0093]

[0094] Specifically, the coordinates of the calibration center of gravity O are (X0, Y0), and the coordinates of the sampling center of gravity O' are (X c , Y c ), so the magnitude of the plane vector OO' is

[0095] Figure 2 A flowchart of another method for detecting chain deviation of a wire cutting machine provided in this embodiment. Figure 2 As shown, S8. Take the calibration center of gravity O(X0, Y0) as the origin, establish a reference coordinate system, and obtain the sampling center of gravity O'(X c , Y c ) in the reference coordinate system; including:

[0096] Establish a reference coordinate system with the calibrated center of gravity O (X0, Y0) as the origin;

[0097] The reference coordinate system is divided into the first to fourth reference quadrants using the horizontal and vertical axes of the reference coordinate system as dividing lines;

[0098] By comparing X c With X o The value of Y C With Y o The numerical value of the sample is used to determine the sampling center of gravity O'(X c , Yc ) in the reference coordinate system.

[0099] Specifically, the reference coordinate system is Figure 5 The first to fourth reference quadrants are divided as shown in Figure 5 As shown, the first reference quadrant, the second reference quadrant, the third reference quadrant, and the fourth reference quadrant. c , Y c ) is located in one of the reference quadrants, or on the coordinate axis. By comparing X c With X o The value of Y C With Y o The numerical value of the sample is used to determine the sampling center of gravity O'(X c , Y c ) The position results are as follows:

[0100] Table 1

[0101]

[0102] Figure 3 A flowchart of another method for detecting chain deviation of a wire cutting machine provided in this embodiment. Figure 3 As shown, the step S9 of "determining whether the row chain is deviated according to the sampling distances X1', Y2', X3', and the modulus of the plane vector OO'" includes:

[0103] S91. Set the distance thresholds between the three points A, B, and C and the chain respectively. When any sampling distance X1', Y2', or X3' reaches the distance threshold, it is determined that the chain has deviated;

[0104] Specifically, the distance thresholds between the three points A, B, and C and the row of chains include the maximum distance value and the minimum distance value between each point and the row of chains. When the distance between any one of the three points A, B, and C and the row of chains is between the maximum distance value and the minimum distance value corresponding to the point, it is considered that the row of chains has not deviated. When the distance between any one of the three points A, B, and C and the row of chains is less than the minimum distance value corresponding to the point, it is considered that the row of chains has deviated and is approaching the point. When the distance between any one of the three points A, B, and C and the row of chains is greater than the maximum distance value corresponding to the point, it is considered that the row of chains has deviated and is moving away from the point.

[0105] S92. Set a modulus threshold of the plane vector OO'. When the actual value of the modulus of the plane vector OO' is greater than the modulus threshold, it is determined that the chain has deviated.

[0106] Specifically, the modulus threshold of the plane vector OO' includes a maximum value and a minimum value. When the actual value of the modulus of the plane vector OO' is between the maximum value and the minimum value, it is considered that the row chain has not deviated. When the actual value of the modulus of the plane vector OO' is greater than the maximum value or less than the minimum value, it is considered that the row chain has deviated.

[0107] Figure 4 A flowchart of another method for detecting chain deviation of a wire cutting machine provided in this embodiment. Figure 4 As shown, in step S9, if it is determined that the chain is deviated, then according to the sampling center of gravity O'(X c , Y c ) in the reference coordinate system to determine the type of deviation of the chain; ", including:

[0108] S93. Establish all deviation types of the chain: parallel deviation to the left, parallel deviation to the right, inclined deviation to the left, inclined deviation to the right;

[0109] Specifically, Figure 7 This is a schematic diagram of the chain running parallel to the left; Figure 8 This is a schematic diagram of the chain running parallel to the right; Fig. 9 This is a schematic diagram of the chain shifting to the left; Fig.10 The diagram is a diagram of the chain shifting to the left. The above four types of deviation completely cover the deviation of the chain.

[0110] S94. Obtain the sampling center of gravity O' when the extreme deviation occurs under each deviation type 极限 Position in the reference coordinate system;

[0111] S95. Obtain the plane vector OO' when the extreme deviation occurs under each deviation type 极限 Modulus: |OO' 极限 | 左平 、|OO' 极限 | 右平 、|OO' 极限 | 左斜 、|OO' 极限 | 右斜 ;

[0112] S96. According to the sampling center O'(X c , Y c ) in the reference coordinate system to determine the type of deviation of the chain, and compare the magnitude of the plane vector OO' with the plane vector OO' corresponding to the deviation type 极限 The model is used to determine whether the chain exceeds the deviation limit.

[0113] Specifically, when the chain is not deviated, the distances between the three points A, B, and C and the chain are X1, Y2, and X3 respectively, and the coordinates of the calibrated center of gravity O are (X0, Y0), where X0 = [X1 + (-X3)] / 3, and Y0 = Y2 / 3.

[0114] When the chain is deviated, the sampling distances between the three points A, B, and C and the chain are X1', Y2', and X3' respectively, and the coordinates of the sampling center of gravity O' are (X c , Y c ), where X c =[X1'+(-X3')] / 3, Y c =Y2' / 3When X0 and X c Equal, Y0 and Y c When they are equal, the sampling center of gravity O' coincides with the calibration center of gravity O.

[0115] (1) When the vehicle is running parallel to the left, Figure 7 As shown in the figure, relative to X1, Y2, and X3, X1' and X3' decrease, while Y2' increases. Since X1' and X3' decrease by the same amount, the difference between them remains unchanged. c =X0,Y c >Y0, that is, the sampling center O'(X c , Y c ) is located on the axis between the first and second reference quadrants of the reference coordinate system.

[0116] (2) When the vehicle is running parallel to the right, Figure 8 As shown in the figure, relative to X1, Y2, and X3, X1' and X3' increase, while Y2' decreases. Since X1' and X3' increase by the same amount, the difference between them remains unchanged. c =X0,Y c <Y0, that is, the sampling center O'(X c , Y c ) is located on the axis between the third and fourth reference quadrants of the reference coordinate system.

[0117] (3) When the vehicle is tilted to the left, Fig. 9 As shown, relative to X1, Y2, and X3, X1' decreases, X3' increases, and Y2' increases. c <X0, Y c >Y0, that is, the sampling center O'(X c , Y c ) is located in the second reference quadrant of the reference coordinate system.

[0118] (4) When the vehicle is tilted to the right, Fig.10 As shown in the figure, relative to X1, Y2, and X3, X1' increases, X3' decreases, and Y2' decreases.c >X0,Y c <Y0, that is, the sampling center O'(X c , Y c ) is located in the fourth reference quadrant of the reference coordinate system.

[0119] In summary, when the sampling center O'(X c , Y c ) is located on the axis between the first and second reference quadrants, the deviation type of the chain is parallel deviation to the left; when the sampling center of gravity O'(X c , Y c ) is located on the axis between the third and fourth reference quadrants, the deviation type of the chain is parallel deviation to the right; when the sampling center of gravity O'(X c , Y c ) is located in the second reference quadrant, the deviation type of the chain is leftward deviation; when the sampling center of gravity O'(X c , Y c ) is in the fourth reference quadrant, the deviation type of the chain is rightward deviation.

[0120] In a second aspect, this embodiment provides a chain deviation detection system for a wire cutting machine. Fig.13 A schematic diagram of a chain deviation detection system for a wire cutting machine provided in this embodiment.

[0121] like Fig.13 As shown, the wire cutting machine chain deviation detection system of this embodiment includes: a detection module, a conversion module, a control module and a human-computer interaction module; the detection module is used to obtain the initial distances X1, Y2, X3 between the three points A, B, C and the chain, and periodically obtain the sampling distances X1', Y2', X3' between the three points A, B, C and the chain; the conversion module is used to convert the distance signal obtained by the detection module into an electrical signal, and input it into the control module; the control module can process the electrical signal, and calculate whether the chain is deviated, and determine the type of deviation; the human-computer interaction module is connected to the control module; the human-computer interaction module is used to display the calculation results of the control module.

[0122] Specifically, the control module obtains the modulus of the plane vector OO' and obtains the sampling center of gravity O'(X c , Y c ) in the reference coordinate system. Fig.11As shown. According to the calibration command, sampling is performed at the three points A, B, and C to obtain three initial distances X1, Y2, and X3. The data of the three initial distances are converted into three initial coordinate points in the plane rectangular coordinate system. A calibration triangle is established with the three initial coordinate points as vertices, and the calibration center of gravity is calculated, and the calibration is completed. According to the sampling command, sampling is performed at the three points A, B, and C to obtain three sampling distances X1', Y2', and X3'. The data of the three sampling distances are converted into three sampling coordinate points in the plane rectangular coordinate system. A sampling triangle is established with the three sampling coordinate points as vertices, and the sampling center of gravity is calculated. Calculate the modulus of the plane vector formed by the calibration center of gravity and the sampling center of gravity. Establish a reference coordinate system with the calibration center of gravity as the origin, and divide it into the first to fourth reference quadrants. Calculate the coordinate size relationship between the calibration center of gravity and the sampling center of gravity, and obtain the position of the sampling center of gravity in the reference coordinate system.

[0123] The control module calculates whether the chain is deviated. Fig.12 As shown. The result of the chain deviation is given by two levels of calculation. The first level of primary deviation calculation sets the thresholds of the three values ​​of X1, Y2, and X3. When the actual detected distance is greater than the corresponding threshold, it means that the chain has approached or moved away from the point, and it can be directly judged that the chain has deviated in this direction; set the threshold of the vector OO' modulus. When the modulus of the actual vector OO' calculated by the system is greater than the vector modulus threshold, the system judges that the chain has deviated. Then the second level of calculation, that is, the complex deviation calculation, is performed to calculate the positional relationship between the coordinates of point O' and the coordinates of point O, and correspond to Table 1 to obtain the position of O' in the reference coordinate system, and then confirm the deviation type.

[0124] The calculation results displayed in the human-computer interaction module are as follows: Fig.14 As shown. The detection result of the chain deviation is displayed in the upper computer system in the form of a plane rectangular coordinate system, and a deviation prompt message is given at the same time. A plane rectangular coordinate system with the calibrated center of gravity O as the origin is established in the upper computer system, and the calibrated center of gravity O is displayed in the coordinate system, and the coordinates of the sampling center of gravity O' are used as variables and displayed in the coordinate system.

[0125] In some embodiments, the detection module includes: a first eddy current sensor, a second eddy current sensor and a third eddy current sensor; the first eddy current sensor and the second eddy current sensor are respectively arranged on the left and right sides of the running direction of the chain row; the third eddy current sensor and the first eddy current sensor are located on the same side of the chain row, and the third eddy current sensor and the first eddy current sensor are spaced apart in the running direction of the chain row.

[0126] like Figure 6As shown, the first eddy current sensor and the second eddy current sensor are respectively installed on both sides of the front driving roller of the chain (i.e., point A and B), and the third eddy current sensor is installed on one side of the rear driven roller of the chain (i.e., point C), so as to detect the distances between the three points and the chain respectively. The first to third eddy current sensors of this embodiment are installed on the side plate of the chain and are flush with the inner plate surface of the side plate. The installation position of the first to third eddy current sensors is consistent with the height of the chain, so as to monitor the side edge of the chain.

[0127] In a third aspect, the present embodiment provides a storage medium on which a computer program is stored. When the computer program is executed by a processor, the above-mentioned method for detecting chain deviation of a wire cutting machine is implemented.

[0128] It can be understood that the technical solution of this embodiment can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.), and includes a number of instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each implementation scenario of this application.

[0129] It is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0130] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention. The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention, and these improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. A method for detecting chain deviation of a wire cutting machine, characterized in that: The method comprises the following steps: The initial distances X1, Y2, and X3 between the three points A, B, and C and the row chain are obtained respectively; wherein the two points A and B are located on the left and right sides of the running direction of the row chain respectively, and the point C and the point A are located on the same side of the row chain and there is a gap between the point C and the point A in the running direction of the row chain; Convert the initial distances X1, Y2, and X3 into a plane rectangular coordinate system to form three initial coordinate points (X1, 0), (0, Y2), and (-X3, 0); Establish a calibration triangle with the three initial coordinate points as vertices, and obtain the calibration center of gravity O (X0, Y0) of the calibration triangle; Periodically obtain sampling distances X1', Y2', X3' between the three points A, B, C and the row chain; The sampling distances X1', Y2', and X3' are converted into the plane rectangular coordinate system to form three sampling coordinate points (X1', 0), (0, Y2'), and (-X3', 0); A sampling triangle is established with the three sampling coordinate points as vertices, and the sampling center of gravity O'(X c , Y c ); Taking the calibration center of gravity O(X0, Y0) as the starting point and the sampling center of gravity O'(X c , Y c ) as the end point, establish a plane vector OO', and obtain the modulus of the plane vector OO'; With the calibration center of gravity O(X0, Y0) as the origin, a reference coordinate system is established, and the sampling center of gravity O'(X c , Y c ) in the reference coordinate system; Determine whether the row chain is deviated according to the sampling distances X1', Y2', X3' and the modulus of the plane vector OO'; if it is determined that the row chain is deviated, then c , Y c ) in the reference coordinate system to determine the type of deviation of the chain.

2. The wire cutting machine chain deviation detection method according to claim 1 is characterized in that: The coordinates of the calibration center of gravity O of the calibration triangle are (X0, Y0), where: X0=[X1+(-X3)] / 3 (1) Y0=Y2 / 3 (2).

3. The method for detecting chain deviation of a wire cutting machine according to claim 1, characterized in that: The coordinates of the sampling center of gravity O' of the sampling triangle are (X c , Y c ),in: X c =[X1’+(-X3’)] / 3 (3) Y c =Y2' / 3 (4).

4. The method for detecting chain deviation of a wire cutting machine according to claim 1, characterized in that: The magnitude of the plane vector OO' is:

5. The method for detecting chain deviation of a wire cutting machine according to claim 1, characterized in that: The reference coordinate system is established with the calibration center of gravity O(X0, Y0) as the origin, and the sampling center of gravity O'(X c , Y c ) in the reference coordinate system; including: Establish a reference coordinate system with the calibrated center of gravity O (X0, Y0) as the origin; Dividing the reference coordinate system into first to fourth reference quadrants using the horizontal axis and the vertical axis of the reference coordinate system as dividing lines; By comparing X c With X o The value of Y C With Y o The numerical value of the sampling center O'(X c , Y c ) in the reference coordinate system.

6. The method for detecting chain deviation of a wire cutting machine according to claim 1, characterized in that: The method of judging whether the row of chains is deviated according to the sampling distances X1', Y2', X3' and the modulus of the plane vector OO' comprises: The distance thresholds between the three points A, B, and C and the chain are respectively set. When any of the sampling distances X1', Y2', and X3' reaches the distance threshold, it is determined that the chain has deviated. A modulus threshold of the plane vector OO' is set, and when the actual value of the modulus of the plane vector OO' is greater than the modulus threshold, it is determined that the chain has deviated.

7. The method for detecting chain deviation of a wire cutting machine according to claim 1, characterized in that: If it is determined that the row of chains is deviated, then according to the sampling center of gravity O'(X c , Y c ) determines the deviation type of the chain arrangement according to the position of the chain arrangement in the reference coordinate system; comprising: Establish all deviation types of the chain: parallel deviation to the left, parallel deviation to the right, inclined deviation to the left, inclined deviation to the right; Get the sampling center of gravity O' when the extreme deviation occurs under each deviation type 极限 a position in said reference coordinate system; Get the plane vector OO' when the extreme deviation occurs under each deviation type 极限 Modulus: |OO' 极限 | 左平 、|OO' 极限 | 右平 、|OO' 极限 | 左斜 、|OO' 极限 | 右斜 ; According to the sampling center of gravity O'(X c , Y c ) determines the deviation type of the chain in the reference coordinate system, and compares the magnitude of the plane vector OO' with the plane vector OO' corresponding to the deviation type. 极限 The module determines whether the chain exceeds the deviation limit.

8. A wire cutting machine chain deviation detection system, characterized in that: include: Detection module, conversion module, control module and human-computer interaction module; The detection module is used to obtain the initial distances X1, Y2, X3 between the three points A, B, C and the row chain, and periodically obtain the sampling distances X1', Y2', X3' between the three points A, B, C and the row chain; The conversion module is used to convert the distance signal obtained by the detection module into an electrical signal and input it into the control module; The control module can process the electrical signal, calculate whether the chain is deviated, and determine the type of deviation; The human-computer interaction module is connected to the control module; the human-computer interaction module is used to display the calculation results of the control module.

9. The wire cutting machine chain deviation detection system according to claim 8, characterized in that: The detection module includes: a first eddy current sensor, a second eddy current sensor and a third eddy current sensor; The first eddy current sensor and the second eddy current sensor are respectively arranged on the left and right sides of the running direction of the row of chains; The third eddy current sensor and the first eddy current sensor are located on the same side of the row of chains, and there is a gap between the third eddy current sensor and the first eddy current sensor in a running direction of the row of chains.

10. A storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method according to any one of claims 1 to 7 is implemented.

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