Cable eccentricity detection system and method and computer equipment

Abstract

The invention provides a cable eccentricity detection system and method and computer equipment. The cable eccentricity detection system comprises a first detection device, a second detection device, coating equipment and a control device. The first detection device is used for detecting the first length of the first connecting line and the first included angle between the first connecting line and the preset vertical plane / the preset horizontal plane. The control device is used for determining the circle center position of the cable core based on the first lengths, the first included angles and the first spacing distances of the plurality of first connecting lines. The second detection device is used for detecting the second length of the second connecting line and a second included angle between the second connecting line and the preset vertical plane / the preset horizontal plane. And the control device is used for determining the circle center position of the cable bus based on the second lengths, the second included angles and the second spacing distances of the plurality of second connecting lines. And the control device is also used for determining the eccentricity rate of the cable bus based on the circle center position of the cable core and the circle center position of the cable bus. Therefore, online detection of the eccentricity rate of the cable is realized.

Description

Technical Field

[0001] The present application relates to the field of cables, and in particular to a cable eccentricity detection system, method and computer device. Background Art

[0002] In cable production, cable eccentricity is an important factor affecting cable quality. For example, in composite cables such as aluminum-clad steel cables, cable eccentricity will increase the risk of wire breakage during the drawing deformation process due to uneven stress distribution; in communication cables, cable eccentricity will also affect data transmission quality.

[0003] Currently, after the cable is coated, the thickness and eccentricity of the cable are detected. In this way, the cable production situation cannot be monitored in real time. If the cable eccentricity is unqualified, it cannot be adjusted in time, resulting in material waste and reduced production efficiency. Summary of the Invention

[0004] In order to solve the problems in the prior art, the present application provides a cable eccentricity detection system, method and computer device to realize the online detection of the cable eccentricity rate.

[0005] The present application provides a cable eccentricity detection system, which includes a first detection device, a second detection device, a coating device and a control device; the first detection device, the coating device and the second detection device are arranged in sequence along the transmission direction of the cable; there is a first distance between the first detection device and the transmission axis of the cable; there is a second distance between the second detection device and the transmission axis of the cable; the coating device is used to coat the cable core to form a cable busbar;

[0006] The connection line between the first detection device and the surface of the cable core is the first connection line, and the intersection point of the first connection line and the surface of the cable core is the first detection point; the first connection line is perpendicular to the tangent line of the first detection point; the first detection device is used to detect the first length of the first connection line and the first angle between the first connection line and a preset vertical plane / preset horizontal plane; the first detection points include multiple ones, and multiple first detection points are all located in a first plane, and the first plane is perpendicular to the transmission direction of the cable; the control device is used to determine the center position of the cable core based on the first lengths, first angles of multiple first connection lines and the first distance.

[0007] The connection line between the second detection device and the surface of the cable busbar is the second connection line, and the intersection point of the second connection line and the surface of the cable busbar is the second detection point; the second connection line is perpendicular to the tangent line at the second detection point; the second detection device is used to detect the second length of the second connection line and the second angle between the second connection line and the preset vertical plane / the preset horizontal plane; there are multiple second detection points, and multiple second detection points are all located in the second plane, and the second plane is perpendicular to the transmission direction of the cable; the control device is used to determine the center position of the cable busbar based on the second lengths, second angles of multiple second connection lines and the second interval distance;

[0008] The control device is further used to determine the eccentricity of the cable busbar based on the center position of the cable core and the center position of the cable busbar.

[0009] In one embodiment, the first detection device includes a distance detection device and an inclination detection device;

[0010] The connection line between the distance detection device and the surface of the cable core is the first connection line; the intersection point of the first connection line and the surface of the cable core is the first detection point; the distance detection device is used to detect the first length of the first connection line, and the inclination detection device is used to detect the first angle between each first connection line and the preset vertical plane / the preset horizontal plane;

[0011] The distance detection device and the inclination detection device can rotate relative to the cable to form multiple first connection lines and multiple first detection points at multiple different positions;

[0012] The control device is used to determine the coordinates of the corresponding first detection point according to the first length, first angle of each first connection line and the first interval distance; and, determine the center coordinates of the cable core based on the coordinates of multiple first detection points.

[0013] In one embodiment, the first detection device includes multiple position detection devices; multiple position detection devices are all located in the first plane and are arranged around the transmission path of the cable; there is the first interval distance between multiple position detection devices and the transmission axis of the cable; there is a preset angle between adjacent two position detection devices;

[0014] The connection line between the position detection device and the surface of the cable core is the first connection line; the intersection point of the first connection line and the surface of the cable core is the first detection point;

[0015] The first detection device is used to detect the first length of the first connection line and the first included angle between the first connection line and the preset vertical plane / the preset horizontal plane;

[0016] The control device is used to determine the coordinates of the corresponding first detection point based on the first length, the first included angle of each first connection line and the first interval distance; and determine the center coordinates of the cable core based on the coordinates of multiple first detection points.

[0017] In one embodiment, the position detection device includes a distance sensor and an inclination sensor;

[0018] The distance sensor is used to detect the first length of the first connection line between the surface of the cable core and the position detection device; the inclination sensor is used to detect the first included angle between the first connection line and the preset vertical plane / the preset horizontal plane.

[0019] In one embodiment, the first detection device includes a plurality of distance sensors; the plurality of distance sensors are located in a first plane and are arranged around the transmission path of the cable; each distance sensor has a first included angle with the preset vertical plane / the preset horizontal plane;

[0020] The connection line between the distance sensor and the surface of the cable core is the first connection line; the intersection point of the first connection line and the surface of the cable core is the first detection point;

[0021] The distance sensor is used to detect the first length of the first connection line;

[0022] The control device is used to determine the coordinates of the corresponding first detection point based on each first length, the first included angle and the first interval distance; and determine the center coordinates of the cable core based on multiple first detection points.

[0023] In one embodiment, the structure of the second detection device is the same as the structure of the first detection device, and both the first detection point and the second detection point include three, or both the first detection point and the second detection point include four.

[0024] The present application also proposes a cable eccentricity detection method, which is applied to a cable eccentricity detection system. The cable eccentricity detection system includes a coating device; the coating device is used to coat the cable core to form a cable bus. The cable eccentricity detection method includes:

[0025] Obtain the position information of multiple first detection points on the surface of the cable core; the multiple first detection points are all located in a first plane, and the first plane is perpendicular to the transmission direction of the cable;

[0026] Determine the center position of the cable core based on the position information of multiple said first detection points;

[0027] Obtain the position information of multiple second detection points on the surface of the cable busbar; multiple said second detection points are all located in a second plane, and the second plane is perpendicular to the transmission direction of the cable;

[0028] Determine the center position of the cable busbar based on the position information of multiple said second detection points;

[0029] Determine the eccentricity of the cable busbar based on the center position of the cable core and the center position of the cable busbar.

[0030] In one embodiment, the position information includes coordinates, and determining the center position of the cable core based on the position information of multiple said first detection points includes:

[0031] Calculate the center coordinates and radius of the cable core based on the coordinates of multiple said first detection points;

[0032] Determining the center position of the cable busbar based on the position information of multiple said second detection points includes:

[0033] Calculate the center coordinates and radius of the cable busbar based on the coordinates of multiple said second detection points.

[0034] In one embodiment, the cable eccentricity detection method further includes:

[0035] If the eccentricity is greater than a preset eccentricity, adjust the control parameters of the coating device; the control parameters include one or more of rotational speed, temperature, and pressure.

[0036] This application also proposes a computer device, including:

[0037] A memory with a computer program stored thereon;

[0038] A processor for executing the computer program in the memory to implement the above-mentioned cable eccentricity detection method.

[0039] This application detects and determines the positions of multiple first detection points on the surface of the cable core through a first detection device, and then determines the dot position of the cable core according to the positions of the multiple first detection points. The positions of multiple second detection points on the surface of the cable busbar are detected and determined through a second detection device, and then the dot position of the cable busbar is determined according to the positions of the multiple second detection points. The control device can determine the eccentricity of the cable based on the two dot positions, realizing the on-line detection of the cable eccentricity. Further, the control device can also adjust the parameters of the coating device in a timely manner according to the on-line detected eccentricity. Description of the Drawings

[0040] Figure 1 This is a schematic structural diagram of an embodiment of the cable eccentricity detection system of the present application.

[0041] Figure 2 This is a schematic structural diagram of an embodiment of the first detection device of the present application.

[0042] Figure 3 This is a schematic structural diagram of another embodiment of the first detection device of the present application.

[0043] Figure 4 This is a schematic structural diagram of yet another embodiment of the first detection device of the present application.

[0044] Figure 5 This is a schematic structural diagram of yet another embodiment of the first detection device of the present application.

[0045] Figure 6 This is a schematic structural diagram of yet another embodiment of the first detection device of the present application.

[0046] Figure 7 This is a schematic structural diagram of yet another embodiment of the first detection device of the present application.

[0047] Figure 8 This is a flowchart of an embodiment of the cable eccentricity detection method of the present application.

[0048] Figure 9 This is a flowchart of an embodiment of determining the center position of the present application.

[0049] Figure 10 This is a flowchart of another embodiment of the cable eccentricity detection method of the present application.

[0050] Description of main component symbols:

[0051] Cable eccentricity detection system 100

[0052] First detection device 110

[0053] Second detection device 120

[0054] Coating device 130

[0055] Control device 140

[0056] Cable core 210

[0057] Cable bus bar 220

[0058] Distance detection device 111

[0059] Inclination detection device 112

[0060] Position detection device 113

[0061] Distance sensor 114

[0062] Preset vertical plane Y

[0063] Preset horizontal plane X

[0064] First detection point 115

[0065] The following specific embodiments will further illustrate the present application in conjunction with the above-mentioned drawings. Specific embodiments

[0066] The following description will refer to the drawings to more fully describe the content of the present application. The exemplary embodiments of the present application are shown in the drawings. However, the present application can be implemented in many different forms and should not be construed as limited to the exemplary embodiments set forth herein. These exemplary embodiments are provided to make the present application thorough and complete, and to fully convey the scope of the present application to those skilled in the art. Similar reference numerals denote the same or similar components.

[0067] The terms used herein are for the purpose of describing specific exemplary embodiments only and are not intended to limit the present application. As used herein, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include the plural forms as well. In addition, when used herein, "comprising" and / or "including" and / or "having", integers, steps, operations, components and / or components, but do not exclude the presence or addition of one or more other features, regions, integers, steps, operations, components and / or their groups.

[0068] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. In addition, unless clearly defined in the text, terms such as those defined in a general dictionary should be construed as having a meaning consistent with their meaning in the relevant art and the content of this application, and will not be construed as idealized or overly formal meanings.

[0069] The following content will describe the exemplary embodiments in conjunction with the drawings. It should be noted that the components depicted in the reference drawings are not necessarily shown to scale; and the same or similar components will be given the same or similar reference numerals or similar technical terms.

[0070] In cable production, cable eccentricity is an important factor affecting cable quality. For example, in composite cables such as aluminum-clad steel cables, cable eccentricity can lead to a risk of wire breakage during the cable drawing and deformation process due to uneven stress distribution. Cable eccentricity may also affect data transmission quality. The non-contact detection processes of related technologies, such as eddy current thickness measurement, measure the thickness of the non-conductive layer on the surface of the conductive substrate and are not applicable to the on-line detection of aluminum-clad steel cables. Another example is magnetic thickness measurement, which is for the detection of two substrate and coating materials with significantly different magnetic flux rates and is also not applicable to the on-line detection of aluminum-clad steel cables.

[0071] The cable eccentricity detection system, method and computer device according to the embodiments of the present application can realize the on-line detection of composite cables such as aluminum-clad steel cables, accurately measure the eccentricity rate of composite cables such as aluminum-clad steel cables, and then facilitate adjusting the parameters of the coating equipment in a timely manner according to the eccentricity rate detected on-line during the cable production process, improving the quality of the cables.

[0072] Referring to Figure 1 , the present application provides a cable eccentricity detection system 100. The cable eccentricity detection system 100 includes a first detection device 110, a second detection device 120, a coating device 130 and a control device 140. The first detection device 110, the coating device 130 and the second detection device 120 are arranged in sequence along the transmission direction of the cable. There is a first spacing distance between the first detection device 110 and the transmission axis of the cable. There is a second spacing distance between the second detection device 120 and the transmission axis of the cable. The coating device 130 is used to coat the cable core 210 to form a cable bus 220. Among them, the control device 140 can be implemented by a chip with control functions such as a microprocessor or a signal processor.

[0073] The connection line between the first detection device 110 and the surface of the cable core 210 is the first connection line, and the intersection point of the first connection line and the surface of the cable core 210 is the first detection point 115; the first connection line is perpendicular to the tangent line of the first detection point 115; the first detection device 110 is used to detect the first length of the first connection line and the first angle between the first connection line and the preset vertical plane / preset horizontal plane X; the number of the first detection points 115 is multiple. For example, the number of the first detection points 115 can be three, four or more than four. Multiple first detection points 115 are all located in the first plane, and the first plane is perpendicular to the transmission direction of the cable; the control device 140 is used to determine the center position of the cable core 210 based on the first lengths, first angles of multiple first connection lines and the first interval distance. Wherein, the preset vertical plane Y can be the plane where the gravity direction is located, and the preset horizontal plane X is perpendicular to the preset vertical plane Y. The preset vertical plane / preset horizontal plane X can be determined by a level, a theodolite, a laser plummet, etc.

[0074] The connection line between the second detection device 120 and the surface of the cable bus 220 is the second connection line, and the intersection point of the second connection line and the surface of the cable bus 220 is the second detection point; the second connection line is perpendicular to the tangent line of the second detection point; the second detection device 120 is used to detect the second length of the second connection line and the second angle between the second connection line and the preset vertical plane / preset horizontal plane X; the number of the second detection points is multiple. For example, the number of the second detection points can be three, four or more than four. Multiple second detection points are all located in the second plane, and the second plane is perpendicular to the transmission direction of the cable; the control device 140 is used to determine the center position of the cable bus 220 based on the second lengths, second angles of multiple second connection lines and the second interval distance.

[0075] The control device 140 is further used to determine the eccentricity of the cable bus 220 based on the center position of the cable core 210 and the center position of the cable bus 220.

[0076] In this embodiment, the cable can be a composite material wire, a communication cable, etc. For example, the cable is an aluminum-clad steel cable. The aluminum-clad steel cable adopts the continuous extrusion coating technology. After the steel wire core enters the coating device 130, an aluminum layer is coated on the steel wire core to form an aluminum-clad steel busbar.

[0077] During the continuous extrusion coating process, due to reasons such as die wear and process control fluctuations, the aluminum-clad steel busbar will be eccentric. The eccentricity of the aluminum-clad steel busbar means that the thickness of the aluminum cladding layer is uneven, which will lead to problems such as an increased risk of wire breakage due to uneven stress distribution during the drawing deformation process and uneven corrosion resistance distribution of the aluminum-clad steel.

[0078] Therefore, in this embodiment, the first detection device 110 can determine the positions of multiple detection points on the steel wire core before cladding, and determine the center position of the steel wire core according to the positions of the multiple detection points. Similarly, the second detection device 120 can determine the positions of multiple detection points on the aluminum-clad steel busbar after cladding, and then determine the center position of the aluminum-clad steel busbar. In this way, the eccentricity of the aluminum-clad steel busbar can be determined according to the two center positions.

[0079] Specifically, referring to Figure 2 , the first detection device 110 can be arranged facing the cable transmission axis, so that the first connection line between it and the first detection point 115 on the surface of the steel wire core is perpendicular to the tangent of the first detection point 115, so that the first detection device 110, the first detection point 115 and the cable transmission axis are basically on a straight line. That is to say, the first connection line and the first interval distance are basically on a straight line. In this way, based on the first interval distance and the first length of the first connection line, the distance between the cable transmission axis and the first detection point 115 can be determined.

[0080] The first detection device 110 can detect the first included angle between the current position and the preset vertical plane / preset horizontal plane X. Taking the cable transmission axis as the origin, the preset vertical plane as the y-axis, and the preset horizontal plane X as the x-axis. Given the distance between the first detection point 115 and the origin, and the included angle between the connection line between the first detection point 115 and the origin and the x-axis / y-axis, according to the Pythagorean theorem and trigonometric function formulas, the distance of the first detection point 115 from the x-axis and the distance from the y-axis can be calculated, that is, the coordinates of the first detection point 115:

[0081]

[0082] l1 + l2 = L,

[0083] where l1 is the distance between the first detection point 115 and the origin, l2 is the first length, and L is the first interval distance. Substituting the first angle θ, the first length l2, and the first interval distance L into the formula, the coordinates (x, y) of the first detection point 115 can be obtained.

[0084] Taking three for both the first detection point 115 and the second detection point as an example, in this way, the coordinates of three first detection points 115 on the surface of the steel wire core can be determined respectively.

[0085] The cross-section of the cable is usually circular. According to the principle of determining a circle by three points, substituting the coordinates (x1, y1), (x2, y2), (x3, y3) of the three first detection points 115 into the following formula to determine the center coordinates (h, k) and radius r of the cross-section of the steel wire core:

[0086]

[0087]

[0088] Similarly, the second lengths and second included angles of the three second connecting lines are detected by the second detecting device 120, and the center coordinates (h1, k1) and the radius r1 of the aluminum-clad steel busbar can be obtained through the above method.

[0089] After that, calculate the distance between the two centers

[0090]

[0091] Taking the case where both the first detection point 115 and the second detection point include four, in this way, the coordinates of the four first detection points 115 on the surface of the steel wire core can be determined respectively.

[0092] It can be understood that due to manufacturing process deviations, project requirements, etc., the cross-section of the cable may be circular or elliptical. By using four or more first detection points 115 and second detection points, the eccentricity detection requirements for circular or elliptical cable cross-sections can be met. Compared with the case where three first detection points 115 and three second detection points cannot accurately apply to elliptical cable cross-sections, it has stronger detection ability. Taking the case where the first detection point 115 includes four, assume the equation of the cross-section of the steel wire core is:

[0093] (x - a) 2 +(y - b) 2 =r 2 , where (a, b) are the center coordinates of the steel wire core and r is the radius. Expanding the above equation gives x 2 - 2ax + a 2 + y 2 - 2by + b 2 =r 2 . Let A = -2a, B = -2b, C = a 2 + b 2 - r 2 , then the equation can be written as x 2 + y 2 + Ax + By + C = 0.

[0094] Substituting the coordinates (x i , y i ) of each first detection point 115 into the equation, we can get x i 2 + y i 2 + Ax i + By i + C = 0, which forms a system of linear equations. Where i = 1, 2, 3, 4.

[0095] Using the least squares method, the goal is to minimize the sum of the squares of the errors to the minimum. By taking the partial derivatives of S with respect to A, B, and C respectively and setting the partial derivatives to 0, a system of linear equations is obtained:

[0096]

[0097] By solving this system of linear equations, the values of A, B, and C can be obtained, and then the center coordinates (a, b) and radius r of the steel wire core can be obtained.

[0098] Similarly, by detecting the second length and the second included angle of the second connection line through the second detection device 120 and calculating through the above method, the center coordinates (a1, b1) and radius r1 of the aluminum-clad steel busbar can be obtained.

[0099] After that, calculate the distance between the two centers

[0100]

[0101] If the calculated eccentricity is greater than the preset eccentricity, the control device 140 can adjust the eccentricity of the aluminum-clad steel busbar by adjusting the parameters of the coating device 130. For example, if the preset eccentricity is 30%, and the actually calculated eccentricity is 38% - 45%, the control device 140 can adjust the eccentricity of the aluminum-clad steel cable produced subsequently by increasing the rotation speed of the extrusion wheel of the coating device 130, increasing the coating pressure of the coating device 130, increasing the temperature inside the coating device 130, etc. In this way, the on-line detection and real-time adjustment of the eccentricity during the cable production process are realized.

[0102] In this application, the first detection device 110 is used to detect and determine the positions of a plurality of first detection points 115 on the surface of the cable core 210, and then the center point position of the cable core 210 is determined according to the positions of the plurality of first detection points 115. The second detection device 120 is used to detect and determine the positions of a plurality of second detection points on the surface of the cable busbar 220, and then the center point position of the cable busbar 220 is determined according to the positions of the plurality of second detection points. The control device can determine the eccentricity of the cable according to the two center point positions, realizing the on-line detection of the cable eccentricity. Further, the control device can also adjust the parameters of the coating device 130 in a timely manner according to the on-line detected eccentricity.

[0103] Refer to Figure 3, in one embodiment, the first detection device 110 includes a distance detection device 111 and an inclination detection device 112. The line connecting the distance detection device 111 and the surface of the cable core 210 is the first connection line; the intersection point of the first connection line and the surface of the cable core 210 is the first detection point 115; the distance detection device 111 is used to detect the first length of the first connection line, and the inclination detection device 112 is used to detect the first angle between each first connection line and the preset vertical plane / the preset horizontal plane X. The distance detection device 111 and the inclination detection device 112 can rotate relative to the cable to form multiple first connection lines and multiple first detection points 115 at multiple different positions. The control device 140 is used to determine the coordinates of the corresponding first detection point 115 according to the first length, the first angle of each first connection line, and the first interval distance; and, based on the coordinates of multiple first detection points 115, determine the center coordinates of the cable core 210.

[0104] In this embodiment, the distance detection device 111 can be implemented by a laser rangefinder, an optoelectronic sensor, etc. For example, the distance detection device 111 is a laser rangefinder. The emission direction of the laser rangefinder is set to face the cable transmission axis, so that the laser rangefinder, the first detection point 115, and the cable transmission axis are basically on a straight line. The laser rangefinder emits a laser pulse, and after the laser pulse hits the surface of the cable core 210 and is reflected back and received by the laser rangefinder, the distance between the laser rangefinder and the surface of the cable core 210, that is, the distance of the first connection line, can be calculated by measuring the time required for the light pulse to travel back and forth once. The inclination detection device 112 can be implemented by an inclination sensor. The inclination detection device 112 can be arranged close to the distance detection device 111 to accurately detect the first angle.

[0105] The distance detection device 111 and the inclination detection device 112 can be arranged on a rotating mechanism, and the rotating mechanism drives the distance detection device 111 and the inclination detection device 112 to rotate around the transmission axis to detect the cable core 210 at different positions to form multiple first detection points 115.

[0106] Refer to Figure 4, in one embodiment, the first detection device 110 may include four position detection devices 113; the four position detection devices 113 are all located in the first plane and are arranged around the transmission path of the cable; there is the first interval distance between each of the four position detection devices 113 and the transmission axis of the cable; there is a preset angle between two adjacent position detection devices 113. The connection line between the position detection device 113 and the surface of the cable core 210 is the first connection line; the intersection point of the first connection line and the surface of the cable core 210 is the first detection point 115. The first detection device 110 is used to detect the first length of the first connection line and the first angle between the first connection line and the preset vertical plane / the preset horizontal plane X. The control device 140 is used to determine the coordinates of the corresponding first detection point 115 based on the first length, the first angle of each first connection line, and the first interval distance; and to determine the center coordinates of the cable core 210 based on the coordinates of the four first detection points 115.

[0107] In this embodiment, four position detection devices 113 located in the first plane can be provided corresponding to four different positions of the cable core 210. The four position detection devices 113 respectively detect four first distances and the corresponding four first angles, so as to determine the positions of the four first detection points 115. The positions of the position detection devices 113 can also be adjusted according to actual applications.

[0108] In one embodiment, the position detection device 113 includes a distance sensor 114 and an inclination sensor. The distance sensor 114 is used to detect the first length of the first connection line between the surface of the cable core 210 and the position detection device 113; the inclination sensor is used to detect the first angle between the first connection line and the preset vertical plane / the preset horizontal plane X. Among them, the distance sensor 114 can be a laser rangefinder, a photoelectric sensor, etc.

[0109] In one embodiment, the structure of the second detection device 120 is the same as that of the first detection device 110. In this application, the structure of the second detection device 120 can refer to the structure of the first detection device 110 and will not be elaborated here.

[0110] In one embodiment, the first detection device 110 includes four distance sensors 114; the four distance sensors 114 are located in a first plane and are arranged around the transmission path of the cable; each distance sensor 114 has a first included angle with the preset vertical plane / the preset horizontal plane X. The connection line between the distance sensor 114 and the surface of the cable core 210 is the first connection line; the intersection point of the first connection line and the surface of the cable core 210 is the first detection point 115. The distance sensor 114 is used to detect the first length of the first connection line. The control device 140 is used to determine the coordinates of the corresponding first detection point 115 based on each first length, first included angle, and the first interval distance; and, determine the center coordinates of the cable core 210 based on the four first detection points 115.

[0111] In this embodiment, each distance sensor 114 can be first arranged in the first plane at a fixed first included angle with the preset vertical plane / the preset horizontal plane X. After that, only by detecting the first distance of the first connection line, it can be calculated with the known first included angle and first interval distance to determine the center position of the core cable. Among them, the fixed first included angle can be set to an angle convenient for calculation to simplify the calculation process.

[0112] For example, referring to Figure 5 , the first included angle can be set to 45°. The included angle between two adjacent distance sensors 114 is 90°, and the first included angle between each distance sensor 114 and the preset vertical plane and the preset horizontal plane X is 45°. In this way, in the coordinate system with the cable transmission axis as the origin, the preset vertical plane as the y-axis, and the preset horizontal plane X as the x-axis, the absolute value of the x-axis coordinate of the first detection point 115 is equal to the absolute value of the y-axis coordinate, which is convenient for calculation. In addition, the first included angle can also be set to 30°, 60°, etc.

[0113] Referring to Figure 6, in one embodiment, the first detection device 110 may include three position detection devices 113; the three position detection devices 113 are all located in the first plane and are arranged around the transmission path of the cable; there is the first spacing distance between each of the three position detection devices 113 and the transmission axis of the cable; there is a preset included angle between two adjacent position detection devices 113. The line connecting the position detection device 113 and the surface of the cable core 210 is the first connection line; the intersection point of the first connection line and the surface of the cable core 210 is the first detection point 115. The first detection device 110 is used to detect the first length of the first connection line and the first included angle between the first connection line and the preset vertical plane / the preset horizontal plane X. The control device 140 is used to determine the coordinates of the corresponding first detection point 115 based on the first length, the first included angle of each first connection line, and the first spacing distance; and to determine the center coordinates of the cable core 210 based on the coordinates of the three first detection points 115.

[0114] In this embodiment, three position detection devices 113 located in the first plane can be provided corresponding to three different positions of the cable core 210. The three position detection devices 113 respectively detect three first distances and the corresponding three first included angles, so as to determine the positions of the three first detection points 115. The positions of the position detection devices 113 can also be adjusted according to actual applications.

[0115] In one embodiment, the position detection device 113 includes a distance sensor 114 and an inclination sensor. The distance sensor 114 is used to detect the first length of the first connection line between the surface of the cable core 210 and the position detection device 113; the inclination sensor is used to detect the first included angle between the first connection line and the preset vertical plane / the preset horizontal plane X. Among them, the distance sensor 114 can be a laser rangefinder, a photoelectric sensor, etc.

[0116] In one embodiment, the structure of the second detection device 120 is the same as that of the first detection device 110. In this application, the structure of the second detection device 120 can refer to the structure of the first detection device 110 and will not be elaborated here.

[0117] In one embodiment, the first detection device 110 includes three distance sensors 114; the three distance sensors 114 are located in a first plane and are arranged around the transmission path of the cable; each distance sensor 114 has a first included angle with the preset vertical plane / the preset horizontal plane X. The connection line between the distance sensor 114 and the surface of the cable core 210 is the first connection line; the intersection point of the first connection line and the surface of the cable core 210 is the first detection point 115. The distance sensor 114 is used to detect the first length of the first connection line. The control device 140 is used to determine the coordinates of the corresponding first detection point 115 based on each first length, first included angle, and the first interval distance; and, determine the center coordinates of the cable core 210 based on the three first detection points 115.

[0118] In this embodiment, each distance sensor 114 can be first arranged in the first plane at a fixed first included angle with the preset vertical plane / the preset horizontal plane X. After that, only by detecting the first distance of the first connection line, it can be calculated with the known first included angle and first interval distance to determine the center position of the core cable. Among them, the fixed first included angle can be set to an angle convenient for calculation to simplify the calculation process.

[0119] For example, referring to Figure 7 , the first included angle can be set to 45°. The included angle between two adjacent distance sensors 114 is 90°, and the first included angle between each distance sensor 114 and the preset vertical plane and the preset horizontal plane X is 45°. In this way, in a coordinate system with the cable transmission axis as the origin, the preset vertical plane as the y-axis, and the preset horizontal plane X as the x-axis, the absolute value of the x-axis coordinate of the first detection point 115 is equal to the absolute value of the y-axis coordinate, which is convenient for calculation. In addition, the first included angle can also be set to 30°, 60°, etc.

[0120] Referring to Figure 8 , the present application also proposes a cable eccentricity detection method, which is applied to the cable eccentricity detection system 100. The cable eccentricity detection method includes:

[0121] S1: Obtain the position information of a plurality of first detection points 115 on the surface of the cable core 210; the plurality of first detection points 115 are all located in a first plane, and the first plane is perpendicular to the transmission direction of the cable.

[0122] S2: Determine the center position of the cable core 210 based on the position information of the plurality of first detection points 115.

[0123] S3: Obtain the position information of multiple second detection points on the surface of the cable busbar 220; multiple said second detection points are all located in a second plane, and the second plane is perpendicular to the transmission direction of the cable;

[0124] S4: Determine the center position of the cable busbar 220 based on the position information of multiple said second detection points.

[0125] S5: Determine the eccentricity of the cable busbar 220 based on the center position of the cable core 210 and the center position of the cable busbar 220.

[0126] In this embodiment, the cable can be a composite material wire, a communication cable, etc. For example, the cable is an aluminum-clad steel cable. The aluminum-clad steel cable adopts the continuous extrusion coating technology. After the steel wire core enters the coating device 130, an aluminum layer is coated on the steel wire core to form an aluminum-clad steel busbar.

[0127] In this embodiment, both the first detection point 115 and the second detection point may include three, or both include four or more than four.

[0128] During the continuous extrusion coating process, due to reasons such as die wear and process control fluctuations, the aluminum-clad steel busbar will be eccentric. The eccentricity of the aluminum-clad steel busbar means that the thickness of the aluminum-clad layer is uneven, which will increase the risk of wire breakage due to uneven stress distribution during the drawing deformation process, and problems such as uneven distribution of the corrosion resistance of the aluminum-clad steel.

[0129] Therefore, in this embodiment, the first detection device 110 can be used to determine the positions of multiple detection points on the steel wire core before coating, and the center position of the steel wire core can be determined by fitting according to the positions of multiple detection points. Similarly, the second detection device 120 is used to determine the positions of multiple detection points on the aluminum-clad steel busbar after coating, and then the center position of the aluminum-clad steel busbar is determined. In this way, the eccentricity of the aluminum-clad steel busbar is determined according to the two center positions.

[0130] This application determines the dot position of the cable core 210 through the positions of multiple first detection points 115 on the surface of the cable core 210. The dot position of the cable busbar 220 is determined through the positions of multiple second detection points on the surface of the cable busbar 220. Furthermore, the eccentricity of the cable is determined according to the two dot positions, realizing the on-line detection of the cable eccentricity.

[0131] In one embodiment, the cable eccentricity detection system 100 further includes a first detection device 110 and a second detection device 120. The position information includes coordinates.

[0132] The coordinates of the first detection point 115 can be detected and determined by the first detection device 110. The connection line between the first detection device 110 and the surface of the cable core 210 is the first connection line, and the intersection point of the first connection line and the surface of the cable core 210 is the first detection point 115; the first connection line is perpendicular to the tangent of the first detection point 115; the first detection device 110 can detect the first length of the first connection line and the first angle between the first connection line and the preset vertical plane / preset horizontal plane X. Then, the coordinates of the first detection point 115 are determined according to the first length and the first angle. Similarly, the coordinates of the second detection point can be detected and determined by the second detection device 120.

[0133] The specific steps for calculating the coordinates of the first detection point 115 can refer to the above calculation formula and will not be elaborated here.

[0134] Refer to Figure 9 , step S2 includes:

[0135] S21: Calculate the center coordinates and radius of the cable core 210 based on the coordinates of multiple first detection points 115.

[0136] In this embodiment, the specific steps for calculating the center coordinates of the cable core 210 according to the coordinates of multiple first detection points 115 can refer to the above formula and will not be elaborated here.

[0137] Step S4 includes:

[0138] S41: Calculate the center coordinates and radius of the cable bus 220 based on the coordinates of multiple second detection points.

[0139] In this embodiment, the specific steps for calculating the center coordinates and radius of the cable bus 220 can refer to the calculation steps of the center coordinates of the cable core 210 and will not be elaborated here.

[0140] Refer to Figure 10 , in one embodiment, the cable eccentricity detection method further includes:

[0141] S6: If the eccentricity is greater than the preset eccentricity, adjust the control parameters of the coating device 130; the control parameters include one or more of rotational speed, temperature, and pressure.

[0142] In this embodiment, if the calculated eccentricity is greater than the preset eccentricity, the control device 140 can adjust the eccentricity of the aluminum-clad steel busbar by adjusting the parameters of the coating device 130. For example, if the preset eccentricity is 30% and the actually calculated eccentricity is 38% - 45%, the control device 140 can adjust the eccentricity of the subsequently produced aluminum-clad steel cable by increasing the rotation speed of the extrusion wheel of the coating device 130, increasing the coating pressure of the coating device 130, increasing the temperature inside the coating device 130, etc. In this way, online detection and real-time adjustment of the eccentricity during the cable production process are achieved. If the calculated eccentricity is less than or equal to the preset eccentricity, there is no need to adjust the parameters of the coating device 130.

[0143] This application also proposes a computer device, including:

[0144] A memory storing a computer program thereon;

[0145] A processor for executing the computer program in the memory to implement the above-mentioned cable eccentricity detection method. The content of the cable eccentricity detection method can refer to the above embodiment and will not be elaborated here. The computer device can be a personal computer, an industrial computer, a server, or other devices with data processing and control functions. For example, the computer device can be integrated with the above-mentioned control device 140.

[0146] In the above text, the specific embodiments of this application are described with reference to the accompanying drawings. However, those of ordinary skill in the art can understand that various changes and substitutions can be made to the specific embodiments of this application without departing from the spirit and scope of this application. These changes and substitutions all fall within the scope defined by this application.

Claims

1. A cable eccentricity detection system, characterized in that: The cable eccentricity detection system comprises a first detection device, a second detection device, a coating device and a control device; the first detection device, the coating device and the second detection device are arranged in sequence along the transmission direction of the cable; there is a first spacing distance between the first detection device and the transmission axis of the cable; there is a second spacing distance between the second detection device and the transmission axis of the cable; the coating device is used to coat the cable core to form a cable busbar; The line connecting the first detection device and the surface of the cable core is the first line, and the intersection of the first line and the surface of the cable core is the first detection point; the first line is perpendicular to the tangent of the first detection point; the first detection device is used to detect the first length of the first line, and the first angle between the first line and a preset vertical plane / preset horizontal plane; the first detection points include multiple first detection points, and the multiple first detection points are all located in a first plane, and the first plane is perpendicular to the transmission direction of the cable; the control device is used to determine the center position of the cable core based on the first lengths, first angles and first spacing distances of the multiple first lines; The line connecting the second detection device and the surface of the cable busbar is the second line, and the intersection of the second line and the surface of the cable busbar is the second detection point; the second line is perpendicular to the tangent of the second detection point; the second detection device is used to detect the second length of the second line, and the second angle between the second line and the preset vertical plane / the preset horizontal plane; the second detection point includes a plurality of second detection points, and the plurality of second detection points are all located in the second plane, and the second plane is perpendicular to the transmission direction of the cable; the control device is used to determine the center position of the cable busbar based on the second lengths, the second angles and the second spacing distances of the plurality of second lines; The control device is further used to determine the eccentricity of the cable busbar based on the center position of the cable core and the center position of the cable busbar.

2. The cable eccentricity detection system according to claim 1, characterized in that: The first detection device includes a distance detection device and an inclination detection device; The line connecting the distance detection device and the surface of the cable core is the first line; the intersection of the first line and the surface of the cable core is the first detection point; The distance detection device is used to detect a first length of the first connecting line, and the inclination detection device is used to detect a first angle between each of the first connecting lines and the preset vertical plane / the preset horizontal plane; The distance detection device and the inclination detection device can rotate relative to the cable to form a plurality of the first connection lines and a plurality of the first detection points at a plurality of different positions; The control device is used to determine the coordinates of the corresponding first detection point according to the first length, the first angle and the first interval distance of each first connecting line; And, the center coordinates of the cable core are determined based on the coordinates of the plurality of first detection points.

3. The cable eccentricity detection system according to claim 1, characterized in that: The first detection device includes a plurality of position detection devices; the plurality of position detection devices are all located in the first plane and are arranged around the transmission path of the cable; the plurality of position detection devices are all spaced from the transmission axis of the cable by the first spacing distance; and there is a preset angle between two adjacent position detection devices; The line connecting the position detection device and the surface of the cable core is the first line; the intersection of the first line and the surface of the cable core is the first detection point; The first detection device is used to detect a first length of the first connecting line and a first angle between the first connecting line and the preset vertical plane / the preset horizontal plane; The control device is used to determine the coordinates of the corresponding first detection point based on the first length, the first angle and the first spacing distance of each first connecting line; and determine the center coordinates of the cable core based on the coordinates of multiple first detection points.

4. The cable eccentricity detection system according to claim 3, characterized in that: The position detection device includes a distance sensor and an inclination sensor; The distance sensor is used to detect a first length of a first connection line between the surface of the cable core and the position detection device; the inclination sensor is used to detect a first angle between the first connection line and the preset vertical plane / the preset horizontal plane.

5. The cable eccentricity detection system according to claim 1, characterized in that: The first detection device includes a plurality of distance sensors; the plurality of distance sensors are located on a first plane and are arranged around the transmission path of the cable; each of the distance sensors has a first angle with the preset vertical plane / the preset horizontal plane; The connecting line between the distance sensor and the surface of the cable core is a first connecting line; the intersection of the first connecting line and the surface of the cable core is a first detection point; The distance sensor is used to detect a first length of the first connecting line; The control device is used to determine the coordinates of the corresponding first detection point based on each first length, the first angle and the first spacing distance; and to determine the center coordinates of the cable core based on multiple first detection points.

6. The cable eccentricity detection system according to any one of claims 1 to 5, characterized in that: The structure of the second detection device is the same as that of the first detection device, and the first detection points and the second detection points both include three, or the first detection points and the second detection points both include four.

7. A cable eccentricity detection method, applied to a cable eccentricity detection system, wherein the cable eccentricity detection system comprises a coating device; The coating device is used to coat the cable core to form a cable busbar; it is characterized in that: The cable eccentricity detection method comprises: Acquire position information of a plurality of first detection points on the surface of the cable core; the plurality of first detection points are all located in a first plane, and the first plane is perpendicular to the transmission direction of the cable; Determine the center position of the cable core based on the position information of the plurality of first detection points; Acquire position information of a plurality of second detection points on the surface of the cable busbar; the plurality of second detection points are all located in a second plane, and the second plane is perpendicular to the transmission direction of the cable; Determine the center position of the cable busbar based on the position information of the plurality of second detection points; The eccentricity of the cable busbar is determined based on the center position of the cable core and the center position of the cable busbar.

8. The cable eccentricity detection method according to claim 7, characterized in that: The position information includes coordinates, and determining the center position of the cable core based on the position information of the plurality of first detection points includes: Calculate the center coordinates and radius of the cable core based on the coordinates of the plurality of first detection points; The determining the center position of the cable busbar based on the position information of the plurality of second detection points comprises: The center coordinates and radius of the cable busbar are calculated based on the coordinates of the plurality of second detection points.

9. The cable eccentricity detection method according to claim 7, characterized in that: The cable eccentricity detection method further comprises: If the eccentricity is greater than a preset eccentricity, the control parameters of the coating device are adjusted; the control parameters include one or more of rotation speed, temperature, and pressure.

10. A computer device, characterized in that: include: a memory having a computer program stored thereon; A processor, configured to execute the computer program in the memory to implement the cable eccentricity detection method according to any one of claims 7 to 9.

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