Method and system for detecting chain deviation of a tobacco cutter and storage medium

Abstract

The application provides a tobacco cutting machine chain deviation detection method and system and a storage medium, and belongs to the tobacco processing technical field, and is used for solving the monitoring problem of chain deviation. The application provides a tobacco cutting machine chain deviation detection method, which respectively acquires initial distances between A, B and C three point positions and a chain, establishes a calibration triangle, and acquires a calibration barycenter of the calibration triangle; and acquires sampling distances between the A, B and C three point positions and the chain, establishes a sampling triangle, and acquires a sampling barycenter of the sampling triangle; establishes a plane vector with the calibration barycenter as a starting point and the sampling barycenter as a terminal point; judges whether the chain deviates according to a mode of the sampling distance and the plane vector; if it is judged that the chain deviates, the type of the chain deviation is determined according to the position of the sampling barycenter in a reference coordinate system. The chain deviation condition can be accurately judged, and the method has the advantages of good real-time performance and high accuracy, and provides a basis for the maintenance and adjustment of the chain.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of tobacco processing, and particularly relates to a tobacco cutter chain deviation detection method and system and a storage medium. BACKGROUND

[0002] Tobacco cutting is an important link in the tobacco processing process. The tobacco is transported to the knife door position by the upper and lower two chains of the tobacco cutter, and is cut into qualified tobacco by the knife roller body uniformly provided with a cutter through rotation. The chain is driven to rotate by the front and rear drive rollers, and whether the chain runs smoothly is one of the important factors affecting whether the cutting width can meet the standard. However, with the long-term use of the tobacco cutter, the chain is prone to deviation. Once the chain deviates, it will affect the conveying effect of the tobacco material, and in severe cases, it will cause the chain and the side plate to gnaw each other, causing damage to the equipment. If it is not found in time, it will cause the equipment to stop and affect production. Since the chain is a non-consumable product, it has been checked for deviation only when the maintenance personnel regularly maintain the chain, so there may be a situation that the chain deviation is not checked in time or is not accurately judged. SUMMARY

[0003] Therefore, the technical problem to be solved by the present application is to provide a tobacco cutter chain deviation detection method and system and a storage medium, which can monitor the running state of the chain at any time and monitor the deviation phenomenon, thereby providing a basis for maintenance personnel to maintain as early as possible.

[0004] In a first aspect, the present application provides a tobacco cutter chain deviation detection method, comprising the following steps:

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

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

[0007] The calibration triangle is established with the three initial coordinate points as the vertices, and the calibration barycenter O (X0, Y0) of the calibration triangle is obtained;

[0008] The sampling distances X1', Y2' and X3' between the A, B and C points and the chain are periodically obtained;

[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] A sampling triangle is established with the three sampling coordinate points as vertices, and a sampling barycenter O'(X c , Y c ) of the sampling triangle is obtained.

[0011] A plane vector OO' is established with the calibration barycenter O(X0, Y0) as a starting point and the sampling barycenter O'(X c , Y c ) as a terminal point, and a modulus of the plane vector OO' is obtained.

[0012] A reference coordinate system is established with the calibration barycenter O(X0, Y0) as an origin, and a position of the sampling barycenter O'(X c , Y c ) in the reference coordinate system is obtained.

[0013] Whether the chain is deviated is judged according to the sampling distances X1', Y2', X3', the modulus of the plane vector OO', and if it is judged that the chain is deviated, a deviation type of the chain is determined according to the position of the sampling barycenter O'(X c , Y c ) in the reference coordinate system.

[0014] Optionally, the calibration barycenter O of the calibration triangle has coordinates (X0, Y0), wherein:

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

[0016] Y0 = Y2 / 3 (2)

[0017] Optionally, the sampling barycenter O' of the sampling triangle has coordinates (X c , Y c ), wherein:

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

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

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

[0021]

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

[0023] A reference coordinate system is established with the calibration barycenter O(X0, Y0) as an origin;

[0024] Using the horizontal and vertical axes of the reference coordinate system as boundaries, the reference coordinate system is divided into the first to fourth reference quadrants;

[0025] By comparing X c With X o The numerical value of Y C With Y o The magnitude of the value determines the sampling centroid O'(X). c Y c The position of the reference coordinate system.

[0026] Optionally, the chain sequencer is judged to have deviated based on the sampling distances X1', Y2', X3', and the magnitude of the plane vector OO'; including:

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

[0028] Set a threshold for the modulus of the planar vector OO'. When the actual value of the modulus of the planar vector OO' is greater than the threshold, it is determined that the chain has deviated.

[0029] Optionally, if it is determined that the chain has deviated, then based on the sampling centroid O'(X) c Y c Determine the type of chain deviation by its position in the reference coordinate system; including:

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

[0031] For each type of deviation, the sampled centroid O' is obtained when the extreme deviation occurs. 极限 Position in the reference coordinate system;

[0032] For each type of deviation, obtain the plane vector OO' when the extreme deviation occurs. 极限 The modulus: |OO' 极限 | 左平 、|OO' 极限 | 右平 、|OO' 极限 | 左斜 、|OO' 极限 | 右斜 ;

[0033] Based on the sampling centroid O'(X) c Y c Determine the type of chain deviation by its position in the reference coordinate system, and compare the magnitude of the plane vector OO' with the plane vector OO' corresponding to the type of deviation. 极限 The model is used to determine whether the chain has exceeded the deviation limit.

[0034] In a second aspect, the present application provides a tobacco cutter chain deviation detection system, comprising: a detection module, a conversion module, a control module and a human-computer interaction module; the detection module is configured to obtain initial distances X1, Y2 and X3 between three point positions A, B and C and a chain, and periodically obtain sampling distances X1', Y2' and X3' between the three point positions A, B and C and the chain; the conversion module is configured to convert the distance signals obtained by the detection module into electrical signals and input the electrical signals into the control module; the control module is configured to process the electrical signals and calculate whether the chain deviates and determine a deviation type; the human-computer interaction module is connected to the control module; and the human-computer interaction module is configured to display a calculation result of the control module.

[0035] Optionally, the detection module comprises 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 arranged on left and right sides of a running direction of the chain; the third eddy current sensor is located on the same side of the first eddy current sensor and has a spacing from the first eddy current sensor in the running direction of the chain.

[0036] In a third aspect, the present application provides a storage medium having a computer program stored thereon, wherein the computer program is executed by a processor to implement the tobacco cutter chain deviation detection method.

[0037] Advantages

[0038] The tobacco cutter chain deviation detection method, system and storage medium provided by the present application can monitor a running state of the chain in real time, accurately determine a deviation state of the chain, have good real-time performance and high accuracy, and provide a basis for maintenance and adjustment of the chain. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 A flowchart of a tobacco cutter chain deviation detection method according to an embodiment of the present application;

[0040] Figure 2 A flowchart of a tobacco cutter chain deviation detection method according to another embodiment of the present application;

[0041] Figure 3 A flowchart of a tobacco cutter chain deviation detection method according to still another embodiment of the present application;

[0042] Figure 4 A flowchart of a tobacco cutter chain deviation detection method according to yet another embodiment of the present application;

[0043] Figure 5 A schematic diagram of a reference coordinate system according to an embodiment of the present application;

[0044] Figure 6 A, B, C three point position distribution schematic diagram of an embodiment provided by the application;

[0045] Figure 7 The schematic diagram of the row chain running to the left parallel;

[0046] Figure 8 The schematic diagram of the row chain running to the right parallel;

[0047] Figure 9 The schematic diagram of the row chain running to the left inclined;

[0048] Figure 10 The schematic diagram of the row chain running to the left inclined;

[0049] Figure 11 The flow chart for obtaining the modulus of the plane vector OO' and obtaining the position of the sampling barycenter O'(X c , Y c ) in the reference coordinate system;

[0050] Figure 12 The flow chart for judging whether the row chain is running to the left inclined;

[0051] Figure 13 The schematic diagram of the row chain running to the left inclined;

[0052] Figure 14 The schematic diagram of the man-machine interaction module displaying the calculation result of an embodiment provided by the application. DETAILED DESCRIPTION

[0053] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0054] In addition, the terms "first", "second" are only for description purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0055] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0056] The preferred embodiments of the present application 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 application, and are not used to limit the present application.

[0057] In a first aspect, the present embodiment provides a cutting machine chain running deviation detection method. Figure 1 A flow chart of the cutting machine chain running deviation detection method provided by the present embodiment.

[0058] As shown in Figure 1 , the cutting machine chain running deviation detection method of the present embodiment includes the following steps:

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

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

[0061] For example, referring to Figure 6 , the A, B two points are located on both sides of the front drive roller of the chain, and the C point is located on one side of the rear driven roller of the chain and on the same side of the A point.

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

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

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

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

[0066] Specifically, in the plane rectangular coordinate system, the coordinates of the three vertices of the calibration triangle are known, and the coordinates of the calibration barycenter can be obtained by the arithmetic mean method.

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

[0068] Specifically, the sampling period can be set according to actual use requirements, and the present embodiment does not make too many limitations thereon. For example, the sampling period is 5s.

[0069] S5. Convert the sampling distances X1', Y2', X3' to the plane 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 of the X-axis, the sampling coordinate point (0, Y2') is located on the positive half of the Y-axis, and the sampling coordinate point (-X3', 0) is located on the negative half of the X-axis.

[0071] S6. Establish a sampling triangle with the three sampling coordinate points as vertices, and obtain the sampling barycenter O' (X c , Y c ) of the sampling triangle;

[0072] Specifically, in the plane rectangular coordinate system, the coordinates of the three vertices of the sampling triangle are known, and the coordinates of the sampling barycenter can be obtained by the arithmetic mean method.

[0073] S7. Establish a plane vector OO' with the calibration barycenter O (X0, Y0) as the starting point and the sampling barycenter O' (X c , Y c ) as the ending point, and obtain the modulus of the plane vector OO';

[0074] Specifically, the modulus of the plane vector OO' is the distance between the calibration barycenter O (X0, Y0) and the sampling barycenter O' (X c , Y c ), and thus can be used as an important parameter for judging whether the chain is deviated.

[0075] S8. Establish a reference coordinate system with the calibrated barycenter O (X0, Y0) as the origin, and obtain the position of the sampling barycenter O' (X c , Y c ) in the reference coordinate system;

[0076] Specifically, Figure 5 A schematic diagram of a reference coordinate system provided by the embodiment is shown in FIG. 4. The reference coordinate system has the calibrated barycenter O (X0, Y0) as the origin, and according to the relative position relationship between the calibrated barycenter O (X0, Y0) and the sampling barycenter O' (X c , Y c ), the position coordinates of the sampling barycenter O' (X c , Y c ) in the reference coordinate system can be obtained.

[0077] S9. Determine whether the chain is running off according to the sampling distances X1', Y2', X3' and the modulus of the plane vector OO'; if it is determined that the chain is running off, determine the running-off type of the chain according to the position of the sampling barycenter O' (X c , Y c ) in the reference coordinate system.

[0078] Specifically, after determining the running-off type of the chain according to the position of the sampling barycenter O' (X c , Y c ) in the reference coordinate system, the maintenance personnel can correct and adjust the chain.

[0079] The chain running-off detection method of the tobacco cutter provided by the embodiment can monitor the running state of the chain in real time, and accurately determine the running-off state of the chain, which 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 calibrated barycenter O of the calibration triangle are (X0, Y0), wherein:

[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), and the coordinates of the calibrated barycenter can be obtained according to 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 centroid 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 planar vector OO' is:

[0093]

[0094] Specifically, the coordinates of the calibration centroid O are (X0, Y0), and the coordinates of the sampling centroid O' are (X0, Y0). c Y c Therefore, the magnitude of the planar vector OO' is

[0095] Figure 2 A flowchart illustrating another method for detecting chain misalignment in a shredder provided in this embodiment. In some embodiments, such as... Figure 2 As shown in Figure S8, a reference coordinate system is established with the calibration centroid O (X0, Y0) as the origin, and the sampling centroid O' (X0, Y0) is obtained. c Y c The position of the object in the reference coordinate system; including:

[0096] Establish a reference coordinate system with the calibration centroid O (X0, Y0) as the origin;

[0097] Using the horizontal and vertical axes of the reference coordinate system as boundaries, the reference coordinate system is divided into the first to fourth reference quadrants;

[0098] By comparing X c With X o The numerical value of Y C With Y o The magnitude of the value determines the sampling centroid O'(X). c Yc ) the position in the reference coordinate system.

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

[0100] Table I

[0101]

[0102] Figure 3 A flow chart of another chain running deviation detection method of the tobacco cutting machine is provided in this embodiment. In some embodiments, as shown in Figure 3 , the "determining whether the chain is running deviation according to the sampling distances X1', Y2', X3', and the modulus of the plane vector OO'" in step S9 includes:

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

[0104] Specifically, the distance threshold between the three points A, B, and C and the chain respectively includes the maximum distance value and the minimum distance value between each point and the chain. When the distance between any of the three points A, B, and C and the chain is between the maximum distance value and the minimum distance value corresponding to the point, it is considered that the chain has not run deviation. When the distance between any of the three points A, B, and C and the chain is less than the minimum distance value corresponding to the point, it is considered that the chain has run deviation and is close to the point. When the distance between any of the three points A, B, and C and the chain is greater than the maximum distance value corresponding to the point, it is considered that the chain has run deviation and is away from the point.

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

[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 and minimum values, the chain arrangement is considered to be on track. When the actual value of the modulus of the plane vector OO' is greater than the maximum value or less than the minimum value, the chain arrangement is considered to have deviated.

[0107] Figure 4 A flowchart illustrating another method for detecting chain misalignment in a shredder provided in this embodiment. In some embodiments, such as... Figure 4 As shown, in step S9, "If it is determined that the chain has deviated, then according to the sampling centroid O'(X)..." c Y c The position in the reference coordinate system determines the type of chain deviation; including:

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

[0109] Specifically, Figure 7 This is a schematic diagram showing the chain deviating to the left in a parallel direction; Figure 8 This is a schematic diagram showing the chain deviating to the right in a parallel direction; Figure 9 This is a schematic diagram showing the chain tilting and veering to the left. Figure 10 This is a diagram illustrating a chain misalignment that tilts to the left. The above four types of misalignment completely cover the various situations that can occur with a chain misalignment.

[0110] S94. For each type of deviation, obtain the sampled centroid O' when extreme deviation occurs. 极限 Position in the reference coordinate system;

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

[0112] S96. Based on the sampling centroid O'(X) c Y c Determine the type of chain deviation by its position in the reference coordinate system, and compare the magnitude of the plane vector OO' with the plane vector OO' corresponding to the type of deviation. 极限 The model is used to determine whether the chain has exceeded the deviation limit.

[0113] Specifically, assuming the chain does not deviate from its course, the distances between points A, B, and C and the chain are X1, Y2, and X3, respectively. The coordinates of the center of gravity O are (X0, Y0), where X0 = [X1 + (-X3)] / 3 and Y0 = Y2 / 3.

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

[0115] (1) When veering to the left parallel, such as Figure 7 As shown, relative to X1, Y2, and X3, X1' and X3' decrease, while Y2' increases. Since X1' and X3' decrease by the same amount, their difference remains unchanged. Therefore, X c =X0, Y c >Y0, i.e., sampling centroid O'(X) c Y c It lies on the axis between the first and second reference quadrants of the reference coordinate system.

[0116] (2) When veering to the right parallel, such as Figure 8 As shown, relative to X1, Y2, and X3, X1' and X3' increase, while Y2' decreases. Since X1' and X3' increase by the same amount, their difference remains unchanged. Therefore, X c =X0, Y c <Y0, i.e., sampling centroid O'(X) c Y c It lies on the axis between the third and fourth reference quadrants of the reference coordinate system.

[0117] (3) When the vehicle veers to the left, such as Figure 9 As shown, relative to X1, Y2, and X3, X1' decreases, X3' increases, and Y2' increases. Therefore, X c <X0, Y c >Y0, i.e., sampling centroid O'(X) c Y c It is located in the second reference quadrant of the reference coordinate system.

[0118] (4) When the car veers to the right, such as Figure 10 As shown, relative to X1, Y2, and X3, X1' increases, X3' decreases, and Y2' decreases. Therefore, Xc >X0, Y c <Y0, i.e., sampling centroid O'(X) c Y c It is located in the fourth reference quadrant of the reference coordinate system.

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

[0120] Secondly, this embodiment provides a chain misalignment detection system for a shredder. Figure 13 This is a schematic diagram of a chain misalignment detection system for a shredder provided in this embodiment.

[0121] like Figure 13 As shown, the chain misalignment detection system for the shredder in this embodiment includes: a detection module, a conversion module, a control module, and a human-machine interaction module. The detection module is used to acquire the initial distances X1, Y2, and X3 between three points A, B, and C and the chain, and to periodically acquire 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 signals acquired by the detection module into electrical signals and input them into the control module. The control module can process the electrical signals, calculate whether the chain is misaligned, and determine the type of misalignment. The human-machine interaction module is connected to the control module and is used to display the calculation results of the control module.

[0122] Specifically, the control module obtains the magnitude of the plane vector OO' and the sampling centroid O'(X). c Y c The process of determining the position in the reference coordinate system is as follows: Figure 11The 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 a calibration barycenter is calculated, i.e., the calibration is completed. According to the sampling command, sampling is performed at the three point positions A, B and C to obtain three sampling distances X1', Y2' and X3'. 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 a sampling barycenter is calculated. The modulus of the plane vector formed by the calibration barycenter and the sampling barycenter is calculated. A reference coordinate system with the calibration barycenter as the origin is established, and the first to fourth reference quadrants are divided. The coordinate size relationship between the calibration barycenter and the sampling barycenter is calculated to obtain the position of the sampling barycenter in the reference coordinate system.

[0123] The flow of the control module calculating whether the row chain is deviated is as shown in Figure 12 The result of the row chain deviation is given by two layers of calculation. The first layer of primary deviation calculation sets threshold values of the three values X1, Y2 and X3. When the actually detected distances are greater than the corresponding threshold values, it is indicated that the row chain has approached or moved away from the point position, and the row chain can be directly judged to be deviated in the direction. A threshold value of the modulus of the vector OO' is set. When the modulus of the actual vector OO' calculated by the system is greater than the threshold value of the vector modulus, the system judges that the row chain has been deviated. Then, the second layer of calculation, i.e., the complex deviation calculation, is performed. The positional relationship between the coordinates of the point O' and the coordinates of the point O is calculated, and is corresponded to Table 1 to obtain the position of O' in the reference coordinate system, and then the deviation type is confirmed.

[0124] The calculation result displayed by the human-computer interaction module is as shown in Figure 14 The detection result of the row chain deviation is displayed in the upper computer system in the form of a plane rectangular coordinate system, and deviation prompt information is also given. A plane rectangular coordinate system with the calibration barycenter O as the origin is established in the upper computer system, and the calibration barycenter O is displayed in the coordinate system. The coordinates of the sampling barycenter O' are taken as variables and are 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 and second eddy current sensors are respectively arranged on the left and right sides of the row chain running direction. The third eddy current sensor is located on the same side of the row chain as the first eddy current sensor, and the third eddy current sensor and the first eddy current sensor have a spacing in the row chain running direction.

[0126] As shown in 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. A and B positions), and the third eddy current sensor is installed on one side of the rear driven roller of the chain (i.e. C position) to detect the distance between the three positions and the chain. The first to third eddy current sensors of the embodiment are installed on the side plate of the chain and flush with the inner side surface of the side plate. The first to third eddy current sensor installation positions are consistent with the height of the chain, and the side edges of the chain can be monitored.

[0127] In a third aspect, the embodiment provides a storage medium having a computer program stored thereon, and the computer program is executed by a processor to implement the cutting machine chain deviation detection method.

[0128] It can be understood that the technical solutions of the 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 U disk, a mobile hard disk, etc.), and includes a plurality of instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute the method described in each embodiment scenario of the present application.

[0129] Those skilled in the art can understand that the above advantageous modes can be freely combined and superimposed without conflict.

[0130] The above is only a preferred embodiment of the present application, and is not intended to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application. The above is only a preferred embodiment of the present application, and is not intended to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for detecting chain misalignment in a shredder, characterized in that, The method comprises the following steps: Respectively acquire initial distances X1, Y2, X3 between three point positions A, B, C and the chain; wherein, the two points A and B are respectively located on the left and right sides of the running direction of the chain, and the point C is located on the same side of the point A and has a spacing in the running direction of the chain; Convert the initial distances X1, Y2, X3 into a plane rectangular coordinate system to form three initial coordinate points (X1, 0), (0, Y2), (-X3, 0); Take the three initial coordinate points as vertices to establish a calibration triangle and acquire a calibration barycenter O (X0, Y0) of the calibration triangle; Periodically acquire sampling distances X1', Y2', X3' between the three point positions A, B, C and the chain; Convert the sampling distances X1', Y2', X3' into the plane rectangular coordinate system to form three sampling coordinate points (X1', 0), (0, Y2'), (-X3', 0); A sampling triangle is established with the three sampling coordinate points as vertices, and a sampling barycenter O'(X c , Y c ) of the sampling triangle is obtained. A plane vector OO' is established with the calibrated barycenter O (X0, Y0) as a starting point and the sampling barycenter O' (X c , Y c ) as an ending point, and a module of the plane vector OO' is obtained. establish a reference coordinate system with the calibrated barycenter O (X0, Y0) as an origin, and acquire a position of the sampling barycenter O' (X c 、 Y c ) in the reference coordinate system; According to the sampling distance X1', Y2', X3', the modulus of the plane vector OO' to determine whether the row chain is running off; if it is determined that the row chain is running off, the position of the sampling center of gravity O' (X c , Y c ) in the reference coordinate system is determined to determine the running off type of the row chain.

2. The method of chain run detection for a shredder chain of claim 1, wherein, The calibration barycenter O of the calibration triangle has coordinates (X0, Y0), wherein: X0 = [X1 + (-X3)] / 3 (1) Y0 = Y2 / 3 (2).

3. The method of chain misalignment detection for a shredder chain as defined in claim 1, wherein, The coordinates of the sampling barycenter O' of the sampling triangle are (X c , Y c ), wherein: X c =[X1’+(-X3’)] / 3 (3) Y c =Y2' / 3(4).

4. The method of chain misalignment detection for a shredder chain of claim 1, wherein, The modulus of the plane vector OO' is: |OO’|= (5).

5. The method of chain misalignment detection for a shredder chain as defined in claim 1, wherein, The method comprises: establishing a reference coordinate system with the calibrated barycenter O (X0, Y0) as the origin, and obtaining the position of the sampling barycenter O' (X c , Y c ) in the reference coordinate system; and determining the sampling barycenter O' (X c , Y c ) according to the position of the sampling barycenter O' (X c , Y c ) in the reference coordinate system. Establish a reference coordinate system with the calibration barycenter O (X0, Y0) as the origin; Divide the reference coordinate system into first to fourth reference quadrants with the horizontal and vertical axes of the reference coordinate system as the boundary lines; By comparing the value of X c with the value of X o , the value of Y C with the value of Y o , the position of the sampling center of gravity O' (X c , Y c ) in the reference coordinate system is determined.

6. The method of chain misalignment detection for a shredder chain of claim 1, wherein, The step of judging whether the chain is deviated according to the sampling distances X1', Y2', X3' and the modulus of the plane vector OO' comprises: Respectively set distance thresholds between the three point positions A, B, C and the chain, and judge that the chain has been deviated when any of the sampling distances X1', Y2', X3' reaches the distance threshold; Set a modulus threshold of the plane vector OO', and judge that the chain has been deviated when the actual value of the modulus of the plane vector OO' is greater than the modulus threshold.

7. The method of chain misalignment detection for a shredder chain as defined in claim 1, wherein, If it is determined that the row chain deviates, determining the deviation type of the row chain according to the position of the sampling gravity center O'(X c , Y c ) in the reference coordinate system; comprising: Establish all types of deviation of the chain: left parallel deviation, right parallel deviation, left inclined deviation, and right inclined deviation; Obtain the sampling center of gravity O' when the limit deviation occurs under each deviation type 极限 Position in the reference coordinate system acquiring a plane vector OO' of each of the deviation types when limit deviation occurs 极限 the modulus of the plane vector OO' 极限 | 左平 the modulus of the plane vector OO' 极限 | 右平 the modulus of the plane vector OO' 极限 | 左斜 the modulus of the plane vector OO' 极限 | 右斜 the modulus of the plane vector OO' According to the position of the sampling center of gravity O' (X c , Y c ) in the reference coordinate system, the deviation type of the row chain is determined, and whether the row chain exceeds the deviation limit is judged by comparing the modulus of the plane vector OO' with the modulus of the plane vector OO' 极限 corresponding to the deviation type.

8. A cut tobacco chain misalignment detection system based on the cut tobacco chain misalignment detection method of any one of claims 1 to 7, characterized in that, Comprise: a detection module, a conversion module, a control module, and a human-computer interaction module; The detection module is used to acquire initial distances X1, Y2, X3 between three point positions A, B, C and the chain, and periodically acquire sampling distances X1', Y2', X3' between the three point positions A, B, C and the chain; The conversion module is used to convert the distance signals acquired by the detection module into electrical signals and input the electrical signals into the control module; The control module can process the electrical signals and calculate whether the chain is deviated and determine the type of deviation; The human-computer interaction module is connected to the control module, and the human-computer interaction module is used to display the calculation results of the control module.

9. The cut tobacco chain misalignment detection system of claim 8, wherein, The detection module comprises 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. The third eddy current sensor is located on the same side of the row chain as the first eddy current sensor, and the third eddy current sensor and the first eddy current sensor have a spacing in the row chain running direction.

10. A storage medium having stored thereon a computer program, characterized in that The computer program, when executed by a processor, implements the method of any one of claims 1-7.

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