Intelligent control method and system for shielded data cable processing

Abstract

The invention relates to the technical field of cable processing and production, in particular to an intelligent control method and system for shielded data cable processing, and the method comprises the steps: coating a cable core with a shielding material through a coating and drying mechanism; recording a cable core in a preset length range extending outwards from an outlet position of a first processing pipe of a coating and drying mechanism at the current sampling moment as a to-be-detected cable section, acquiring temperature data of different positions on the surface of the to-be-detected cable section, forming a temperature distribution sequence, and determining the temperature distribution sequence according to the temperature data; the coating thickness of each direction at the current sampling moment is obtained; and determining a first evaluation value, a second evaluation value and an adjustment coefficient at the current sampling moment, obtaining the adjusted traction speed at the next sampling moment, and controlling the processing process of the shielded data cable. According to the invention, by adjusting the pulling speed during cable core processing in real time, the coating uniformity and the curing effect of the shielding layer on the surface of the cable are improved, and the anti-interference capability of the shielding type data cable is improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of cable processing, in particular to an intelligent control method and system for processing of a shielded data cable. BACKGROUND

[0002] In a complex electromagnetic interference environment, the data signal transmitted by a traditional data cable is prone to distortion. Although distortion self-correction can be achieved through data coding, when the overall interference distortion is large, it is difficult to effectively recover the data through data coding, and optimization needs to be performed on the cable itself. Therefore, a shielded data cable is provided with a conductive shielding layer on the original data cable to reduce signal transmission loss and external electromagnetic interference.

[0003] When the shielding layer is prepared by a coating and drying process, the speed at which the cable is pulled by the coating and drying mechanism directly affects the quality of the coated shielding layer. If the pulling speed is unreasonable, the flow leveling time of the shielding material will be insufficient, resulting in uneven coating thickness and affecting the stability of the electromagnetic shielding effectiveness. In addition, due to the characteristics of the shielding material such as graphene, when the shielding layer material is not fully mixed and the radiation heating is uneven in different areas on the surface of the cable, the drying and solidification processes of the shielding material in different areas on the surface of the cable core are different. This non-uniform solidification can cause local material accumulation and micro-cracks in the shielding layer, resulting in poor solidification effect on the surface of the cable and affecting the anti-interference ability of the shielded data cable to external signals. SUMMARY

[0004] To solve the above technical problems, an intelligent control method and system for processing of a shielded data cable are provided to solve the existing problems.

[0005] The technical problem of the application is solved by providing an intelligent control method and system for processing of a shielded data cable, which includes the following steps: In a first aspect, the application provides an intelligent control method for processing of a shielded data cable, which includes the following steps: After the cable core is coated with shielding material by the coating and drying mechanism, the cable core within a preset length range extending outward from the first processing pipe outlet position of the coating and drying mechanism at the current sampling time is recorded as a to-be-measured cable segment. The temperature data of different positions on the surface of the to-be-measured cable segment are obtained by an infrared thermal imager to form a temperature distribution sequence, and the coating thickness of each orientation at the current sampling time is obtained. The temperatures in the temperature distribution sequence are linearly fitted, the deviation of the linear fitting is analyzed, and the difference between the local change trend of all temperatures and the slope of the fitted straight line is analyzed to determine a first evaluation value at the current sampling time. obtaining a thickness distribution sequence based on the measured coating thickness of the to-be-tested cable segment at the first processing pipe outlet position at the current sampling time; calculating a second evaluation value at the current sampling time by the difference between the change trend of adjacent elements in the thickness distribution sequence and the change trend of adjacent elements in the temperature distribution sequence; determining an adjustment coefficient at the current sampling time based on the dispersion of the coating thickness in different directions at the current sampling time and the first evaluation value and the second evaluation value, adjusting the pulling speed of the smearing and drying mechanism in real time to obtain an adjusted pulling speed at the next sampling time, and controlling the processing process of the shielded data cable.

[0006] Preferably, the temperature distribution sequence is obtained by deploying an infrared thermal imager above the first processing pipe outlet, and obtaining an imaging thermal map of the surface of the to-be-tested cable segment at the current sampling time by the infrared thermal imager; selecting temperature data at different positions along the length direction of the cable core in the imaging thermal map, and arranging the temperature data in descending order according to the distance from the first processing pipe outlet to form the temperature distribution sequence at the current sampling time.

[0007] Preferably, the coating thickness at each direction at the current sampling time is obtained by deploying a laser sensor at each direction at the first processing pipe outlet, and obtaining the coating thickness at each direction on the cross section of the cable core at the first processing pipe outlet at the current sampling time by the laser sensor at each direction.

[0008] Preferably, the first evaluation value at the current sampling time is determined by: linearly fitting all elements in the temperature distribution sequence, calculating the slope of the fitting straight line and the fitting error; obtaining the maximum value and the minimum value of all elements in the temperature distribution sequence; selecting the maximum maximum value and the minimum minimum value in the temperature distribution sequence; calculating the relative change rate by the change rate between the maximum maximum value and the minimum minimum value; calculating the difference between the relative change rate and the slope, denoted as trend difference; the first evaluation value is the product of the fitting error and the trend difference.

[0009] Preferably, the relative change rate is calculated by: calculating the difference between the maximum maximum value and the minimum minimum value, denoted as relative temperature difference; the difference between the position number corresponding to the maximum maximum value and the position number corresponding to the minimum minimum value in the temperature distribution sequence is denoted as sequence number difference; The relative change rate is the ratio of the relative temperature difference to the sequence number difference.

[0010] Preferably, the process of obtaining the thickness distribution sequence is: Select the position of the laser sensor that is in the same position as the infrared thermal imager and record it as the main position; All coating thicknesses measured at the main position when the cable section to be measured passes through the first processing tube outlet before the current sampling moment are combined in chronological order to form a thickness distribution sequence at the current sampling moment.

[0011] Preferably, the calculating of the second evaluation value at the current sampling moment includes: Normalizing all elements in the thickness distribution sequence and the temperature distribution sequence respectively, and recording the ratio between each element in the normalized thickness distribution sequence and its previous element as the relative thickness ratio; Calculating the product of each element in the normalized temperature distribution sequence and a preset attenuation coefficient, and recording the ratio of the product to the previous element of each element in the normalized temperature distribution sequence as a relative temperature ratio; The sum of all differences between the relative thickness ratios and the relative temperature ratios is used as a second evaluation value at a current sampling moment.

[0012] Preferably, determining the adjustment coefficient of the current sampling moment includes: Calculating a cumulative sum of the first evaluation value and the second evaluation value; The adjustment coefficient is a normalized result of the product of the discrete degree of the coating thickness in all directions at the current sampling moment and the cumulative sum.

[0013] Preferably, Adjusted pulling speed at each sampling moment The calculation formula is: ,in, To preset the initial pulling speed, For the The adjustment coefficient of each sampling moment, is the preset adjustment amount.

[0014] In the second aspect, an embodiment of the present application also provides an intelligent control system for shielded data cable processing, comprising a memory, a processor, and a computer program stored in the memory and running on the processor. When the processor executes the computer program, the steps of the intelligent control method for shielded data cable processing described in any one of the above items are implemented.

[0015] This application has at least the following beneficial effects: The application determines the first evaluation value of the current sampling time by analyzing the temperature change trend of the coated and dried and cured cable core, which has the beneficial effect of considering the cooling process of the cable core after being pulled out of the outlet of the first processing pipe, analyzing the linear attenuation trend of the temperature at different positions on the surface of the pulled-out cable to be measured, reflecting the nonlinear fluctuation of the radiation temperature distribution on the surface of the cable core outside the outlet of the first processing pipe, and the difference in heat radiation, to evaluate the unevenness of the shielding layer material coating on the surface of the cable core. Secondly, the thickness distribution sequence is obtained, and the second evaluation value of the current sampling time is calculated, which has the beneficial effect of reflecting the curing difference of the cable core in the drying and curing process by the change trend of the coating thickness at adjacent positions on the surface of the cable to be measured and the attenuation change trend of the radiation temperature at adjacent positions, to evaluate the overall curing effect of the shielding layer on the surface of the cable core. The adjustment coefficient of the current sampling time is determined, the pulling speed of the coating and drying mechanism is adjusted in real time, and the adjusted pulling speed of the next sampling time is obtained, and the shielding type data cable processing process is controlled, which has the beneficial effect of adjusting the pulling speed of the coating and drying mechanism in real time according to the overall coating and curing effect of the coating and drying mechanism on the shielding layer on the surface of the cable core, dynamically controlling the pulling speed, prolonging the residence time of the cable core in the first processing pipe, improving the coating uniformity and curing effect of the shielding layer on the surface of the cable core, and improving the anti-interference ability of the shielding type data cable. BRIEF DESCRIPTION OF DRAWINGS

[0016] The intelligent control method for shielding type data cable processing provided by the embodiment of the application will be further described in detail below with reference to the accompanying drawings.

[0017] Figure 1 The step flow chart of the intelligent control method for shielding type data cable processing provided by the embodiment of the application is shown in the figure. Figure 2 The outlet schematic diagram of the first processing pipe provided by the embodiment of the application is shown in the figure. Figure 3 The step flow chart of the acquisition method of the first evaluation value of the current sampling time provided by the embodiment of the application is shown in the figure. Figure 4 The step flow chart of the acquisition method of the second evaluation value of the current sampling time provided by the embodiment of the application is shown in the figure. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme and advantages of the application more clear and understandable, the intelligent control method and system for shielding type data cable processing provided by the application will be further described in detail below with reference to the accompanying drawings and implementation examples. It should be understood that the specific embodiments described herein are only used to explain the application and do not limit the application.

[0019] Unless otherwise defined, all 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.

[0020] Please refer to Figure 1 , which shows a step flow chart of an intelligent control method for processing a shielded data cable according to an embodiment of the present application. The method comprises the following steps: Step 1, after the cable core is coated with shielding material by the coating and drying mechanism, the cable core within the preset length range extending outward from the first processing pipe outlet position of the coating and drying mechanism at the current sampling time is recorded as the to-be-tested cable segment. The temperature data of different positions on the surface of the to-be-tested cable segment is obtained by an infrared thermal imager to form a temperature distribution sequence, and the coating thickness of each orientation at the current sampling time is obtained.

[0021] Since graphene has high specific surface area, electrical conductivity, thermal conductivity, good mechanical properties, and excellent electromagnetic shielding characteristics, graphene is used as the shielding layer material in the present embodiment. During the preparation of the shielded data cable, the cable core is first formed into a suitable gauge number by an extruder, and the graphene material is placed in the coating and drying mechanism through heat treatment. When the cable core passes through the first processing pipe of the coating and drying mechanism, the surface of the cable core is coated with graphene and dried and cured, and gradually cools down outside the outlet of the first processing pipe to form a graphene shielding layer. Then, the multiple coated cable cores are twisted by a twisting device, and after secondary graphene coating in the second processing pipe, they are subjected to insulation layer extrusion by an insulation layer extruder, and finally a shielded cable with a twisted structure is obtained.

[0022] During the preparation of the cable, the coating and drying mechanism generally coats the cable core with a graphene insulation layer at a fixed pulling coating rate. However, due to the size of the graphene insulation layer itself, the surface energy, and the graphene precipitation, the uniformity of the graphene insulation layer coated on the cable core is often poor, which reduces the anti-interference ability of the shielded cable to external electromagnetic signals.

[0023] It should be noted that since copper has high electrical conductivity, it can effectively reduce resistance loss during signal transmission, reduce signal attenuation, and ensure signal integrity and transmission efficiency. To improve the transmission capacity of the cable core, the core material used in the present embodiment is copper core with a copper purity of more than 99.5% to reduce signal attenuation during transmission. In order to improve the mechanical and signal shielding performance of the shielding layer, the content ratio of the shielding layer material mainly includes 65-75% of base resin, 6-10% of graphene, 10-15% of carbon black, and 1-2% of auxiliary condition agent.

[0024] In the embodiment, the base resin can be selected from ethylene-vinyl acetate copolymer, fluorinated ethylene propylene copolymer FEP, etc., the graphene is selected from graphene material with purity greater than 95% after modification, the conductive carbon black is high-structure carbon black, and the auxiliary additive is vinyl silane coupling agent.

[0025] The prepared shielding layer material is placed in the material receiving bin of the coating and drying mechanism, the raw materials are fully mixed by ultrasonic oscillation treatment in the bin body, the bin body is pressurized to 50Kpa~60Kpa, and the temperature is controlled to be above 100℃, so that the shielding layer material is fully mixed and softened to form high-temperature material, and then the high-temperature material is coated on the surface of the cable core in the first processing pipe by pulling and rotary coating and pulled out.

[0026] Since the cable core is coated in the first processing pipe, the coating and drying mechanism pulls the cable core out of the outlet position of the first processing pipe and cools outside the outlet of the first processing pipe. Therefore, in order to determine the coating state of the shielding layer of the cable core, an infrared thermal imager is arranged above the outlet position of the first processing pipe, the cable core within a preset length range extending outward from the outlet position of the first processing pipe at the current sampling time is recorded as the to-be-tested cable segment corresponding to the current sampling time, an imaging thermal map of the surface of the to-be-tested cable segment is obtained by the infrared thermal imager, temperature data at different positions along the length direction of the cable core in the imaging thermal map at the current sampling time is selected, and the temperature data is arranged in descending order according to the distance from the outlet of the first processing pipe to form a temperature distribution sequence. In the embodiment, the preset length range is 50cm, and the sampling time interval of the infrared thermal imager is 1s. As other implementation manners, the implementer can set them according to actual conditions.

[0027] It should be noted that the transverse axis of the imaging thermal map represents the length direction of the cable core, and the longitudinal axis represents the circumference direction of the cable core. The center position of the longitudinal axis is selected, and the temperature at different positions along the transverse axis is selected from the center position. Since the pulling speed of the coating and drying mechanism is constant and known, the sampling time interval is also fixed. Therefore, the distance of the cable core moved between adjacent two sampling times can be obtained. Therefore, the temperature at different positions on the surface of the to-be-tested cable segment along the length direction of the cable core is obtained from the imaging thermal map according to the distance between adjacent two positions.

[0028] It should be noted that, for the convenience of understanding, the outlet schematic diagram of the first processing pipe provided in the embodiment is as shown in Figure 2 , wherein, Figure 2 1 represents the first processing pipe of the coating and drying mechanism, 2 represents the outlet position of the first processing pipe, 3 is the infrared thermal imager, 4 is the cable core, and 5 is the to-be-tested cable segment. Therefore, it is assumed that Figure 2A represents the coating and curing process at the tth sampling time, B represents the coating and curing process at the t+1th sampling time, as the cable core is pulled out of the first processing tube outlet position by the pulling and rotating mechanism, the cable core becomes longer and longer, the black part of the cable core in A represents the cable to be measured at the tth sampling time, and the black part of the cable core in B represents the cable to be measured at the t+1th sampling time, therefore, the infrared thermal imager obtains an imaging thermal map at each sampling time, thereby obtaining the temperature distribution sequence at each sampling time.

[0029] Meanwhile, since the cross section of the cable core is circular, the laser sensor is arranged at multiple azimuths at the first processing tube outlet, the cross section of the cable core at the first processing tube outlet at the current sampling time, and the coating thickness of the shielding layer at different azimuths is measured along the cross section, thereby obtaining the coating thickness at different azimuths at the current sampling time. In this embodiment, the laser sensor is arranged at four azimuths of up, down, left and right at the first processing tube outlet, and the coating thickness of the shielding layer at four azimuths along the circumferential direction of the cable core surface is measured, as other embodiments, the implementer can set it according to the actual situation.

[0030] Wherein, the sampling time interval of the laser sensor is 1s, as other embodiments, the implementer can set it according to the actual situation, therefore, the temperature distribution sequence corresponding to the current sampling time of the cable core is obtained, and the coating thickness at different azimuths at the current sampling time is obtained.

[0031] Thus, the temperature distribution sequence corresponding to the current sampling time is obtained, and the coating thickness at different azimuths at the current sampling time is obtained.

[0032] Step 2, linear fitting is performed on all temperatures in the temperature distribution sequence, the deviation of linear fitting is analyzed, and the difference between the local change trend of all temperatures and the slope of the fitting straight line is analyzed, to determine the first evaluation value at the current sampling time.

[0033] In the coating and drying mechanism, the cable core passes through a first processing tube, where a high-temperature material made from a graphene mixture is applied to the cable core surface via a pulling and spin coating process. Ideally, during coating, the shielding material is evenly applied to the cable core surface. Therefore, after the cable core is pulled out of the first processing tube outlet and gradually cools, locations farther from the first processing tube outlet radiate lower temperatures due to a relatively longer cooling time, while locations closer to the first processing tube outlet radiate higher temperatures due to a relatively shorter cooling time. Ideally, the temperature distribution sequence exhibits a linear decay trend. However, in actual processing, uneven coating of the shielding layer on the cable core surface, such as areas where the coating is too thick or too thin, can lead to uneven heat distribution. This results in greater heat accumulation and slower radiation in thicker areas, while less heat accumulation and faster radiation in thinner areas, disrupting the original linear decay trend.

[0034] Based on the above analysis, the first evaluation value is calculated by analyzing the linear attenuation trend characteristics of all elements in the temperature distribution sequence. The flowchart of the method for obtaining the first evaluation value at the current sampling moment provided in the embodiment of the present application is as follows: Figure 3 As shown, specifically: Performing linear fitting on all elements in the temperature distribution sequence, and calculating the slope of the fitting line and the fitting error; In this embodiment, the least squares method is used for linear fitting, wherein the least squares method is a well-known technology and will not be described in detail here. Secondly, the fitting error is measured by calculating the mean absolute error, wherein the mean absolute error refers to the average value of the absolute error between the fitted value and the actual value. The calculation of the mean absolute error is a well-known technology and will not be described in detail here.

[0035] It should be noted that the calculation formula for the mean absolute error is: ,in, is the mean absolute error, is the first elements, The first The fitted values ​​corresponding to the elements, is the number of all elements in the temperature distribution sequence.

[0036] Obtaining the maximum and minimum values ​​of all elements in the temperature distribution sequence; In this embodiment, the AMPD (Automatic multiscale-based peak detection) algorithm is used to obtain the maximum value and the minimum value. The AMPD algorithm is a well-known technology and will not be described in detail here.

[0037] selecting a maximum maximum value and a minimum minimum value in the temperature distribution sequence; calculating a difference between the maximum maximum value and the minimum minimum value, denoted as a relative temperature difference; In this embodiment, the difference between the maximum maximum value and the minimum minimum value is calculated, denoted as a relative temperature difference.

[0038] the difference between the position sequence number corresponding to the maximum maximum value and the position sequence number corresponding to the minimum minimum value in the temperature distribution sequence is denoted as a sequence number difference; In this embodiment, the difference between the position sequence number corresponding to the maximum maximum value and the position sequence number corresponding to the minimum minimum value in the temperature distribution sequence is denoted as a sequence number difference.

[0039] the ratio of the relative temperature difference to the sequence number difference is denoted as a relative change rate; calculating a difference between the relative change rate and the slope, denoted as a trend difference; In this embodiment, the absolute value of the difference between the relative change rate and the slope is calculated, denoted as a trend difference.

[0040] the product of the fitting error and the trend difference is taken as a first evaluation value at the current sampling time; It should be noted that if the shielding layer material on the surface of the cable core can be uniformly coated, the change trend of the temperature distribution sequence is linear, the smaller the fitting error is, and the closer the relative change rate is to the slope, the smaller the first evaluation value is, and vice versa. The first evaluation value is larger, indicating that the radiation temperature distribution on the surface of the cable core outside the outlet of the first processing pipe appears nonlinear fluctuation, causing the radiation of the overall heat to appear difference, reflecting that the shielding layer material is not uniformly coated on the surface of the cable core.

[0041] At this point, the first evaluation value at the current sampling time is obtained.

[0042] Step 3, based on the measured coating thickness of the cable to be measured at the current sampling time when passing through the outlet position of the first processing pipe, a thickness distribution sequence is obtained; by the difference between the change trend of adjacent elements in the thickness distribution sequence at the current sampling time and the change trend of adjacent elements in the temperature distribution sequence, a second evaluation value at the current sampling time is calculated.

[0043] Further, if the shielding layer material is uniformly coated on the surface of the cable core, and the cable core is pulled by the coating and drying mechanism, the surface of the cable core will be damaged, resulting in poor curing effect of the shielding layer on the surface of the cable core under uniform coating. In addition, the mixing of the shielding layer material in different areas of the surface of the cable core is not sufficient, and the heating by radiation is not uniform, resulting in inconsistent curing rate in different areas of the surface of the cable core. Therefore, even if the shielding layer on the surface of the cable core is relatively uniform, the curing difference of the shielding layer in the curing process will also cause a large deviation in temperature distribution.

[0044] Secondly, in the coating process of the cable shielding layer, the infrared thermal imager can only observe the temperature distribution data of the cable surface in a certain range, and the temperature below the cable cannot be observed. The coating thickness measured by the laser sensor on the same specific surface as the infrared thermal imager is collected, the difference change of the coating thickness and the temperature attenuation of adjacent elements in the temperature distribution sequence are analyzed, and a second evaluation value is calculated. The flow chart of the method for obtaining the second evaluation value at the current sampling time provided by the embodiment of the present application is shown in Figure 4 Select the position of the laser sensor in the same direction as the infrared thermal imager, denoted as the main direction. All coating thicknesses measured on the main direction by the cable to be measured passing through the outlet of the first processing pipe before the current sampling time are arranged in time sequence to form a thickness distribution sequence at the current sampling time. It should be noted that the coating thickness of the position on the surface of the cable to be measured farther from the outlet of the first processing pipe is measured earlier, so the different elements in the thickness distribution sequence are arranged in ascending order in time sequence, and the first element is farther from the outlet of the first processing pipe. The first element in the temperature distribution sequence is also farther from the outlet of the first processing pipe, so the position order of the elements in the thickness distribution sequence and the temperature distribution sequence is consistent.

[0045] All elements in the thickness distribution sequence and the temperature distribution sequence are normalized, and the ratio between each element and its previous element in the normalized thickness distribution sequence is denoted as the relative thickness ratio. In this embodiment, the maximum and minimum value normalization method is used for normalization, and the maximum and minimum value normalization method is a known technology, which will not be described here. As other embodiments, the implementer can use other methods of prior art, such as Z-score standardization method, and the present embodiment does not make special limitation.

[0046] ​The product of each element in the normalized temperature distribution sequence and the preset attenuation coefficient is calculated, and the ratio between the product and the previous element of each element in the normalized temperature distribution sequence is recorded as a relative temperature ratio. In the embodiment, according to the material properties of the cable core, the heat attenuation of the cable core under a single sampling time interval is analyzed by simulating the shielding material coating process of the cable core, and the attenuation coefficient is obtained. In the embodiment, the preset attenuation coefficient is 0.98, and the heat attenuation of the cable core under a single sampling time interval is 2%. As an alternative, the implementer can set it according to the actual situation.

[0047] The sum of the differences between all the relative thickness ratios and the relative temperature ratios is taken as the second evaluation value at the current sampling time. In the embodiment, the cumulative sum of the absolute values of the differences between all the relative thickness ratios and the relative temperature ratios is taken as the second evaluation value at the current sampling time.

[0048] It should be noted that when the coating thickness of the shielding layer on the cable to be measured is relatively uniform, the relative thickness ratio is close to 1. At the same time, after the shielding layer is attenuated by air, the temperature attenuation time interval of the adjacent positions on the cable to be measured is a unit of sampling time. Therefore, the heat of the cable core under a unit sampling time interval should only be affected by attenuation, i.e. affected by the preset attenuation coefficient. After considering the heat attenuation, the relative temperature ratio should be closer to 1, and the second evaluation value should be smaller, indicating that the overall curing condition is better. On the contrary, since the second evaluation value is larger, it indicates that there is a curing difference on the surface of the cable to be measured, and the overall curing condition is poor.

[0049] At this point, the second evaluation value at the current sampling time is obtained.

[0050] Step 4, based on the dispersion of the coating thickness in different directions at the current sampling time, and the first evaluation value and the second evaluation value, an adjustment coefficient at the current sampling time is determined, and the pulling speed of the coating and drying mechanism is adjusted in real time to obtain an adjusted pulling speed at the next sampling time, and the shielding type data cable processing process is controlled.

[0051] Furthermore, the larger the first evaluation value is, the more it indicates that the shielding layer on the surface of the cable core has uneven coating thickness. The high pulling speed may cause unstable feeding of the extruder, resulting in fluctuations in the coating thickness of the shielding layer, and it is necessary to reduce the pulling speed of the coating and drying mechanism; secondly, the larger the second evaluation value is, the more it indicates that the shielding layer on the surface of the cable core has local curing differences, and it is necessary to extend the residence time of the cable core in the heating zone to allow the shielding layer material to be fully heated and cured, and reduce the performance differences caused by curing differences. It is necessary to increase the drying time inside the first processing tube, and the pulling speed of the coating and drying mechanism should be reduced. Therefore, the larger the first evaluation value and the second evaluation value are, the poorer the overall coating and curing effect of the coating and drying mechanism, and it is necessary to reduce the pulling speed of the coating and drying mechanism to improve the coating uniformity and curing effect of the shielding layer on the surface of the cable core.

[0052] Based on the above analysis, an adjustment coefficient is determined based on the first evaluation value and the second evaluation value, specifically: Calculating the cumulative sum of the first evaluation value and the second evaluation value; calculating the normalized result of the product of the discrete degree of the coating thickness in all directions at the current sampling moment and the cumulative sum as the adjustment coefficient at the current sampling moment; In this embodiment, the degree of discreteness is measured by calculating the variance of the coating thickness in all directions at the current sampling moment. As other implementation methods, the implementer may adopt other methods of the prior art, such as standard deviation, etc., and this embodiment does not impose any special restrictions on this. Secondly, the sigmoid function is used for normalization processing, wherein the sigmoid function is a well-known technology and will not be repeated here. As other implementation methods, the implementer may adopt other methods of the prior art, such as softmax function, tanh function, etc., and this embodiment does not impose any special restrictions on this.

[0053] Then, based on the adjustment coefficient, the pulling speed at the next sampling moment is adjusted, specifically: in, For the The adjusted pulling speed at each sampling moment, To preset the initial pulling speed, For the The adjustment coefficient of each sampling moment, is the preset adjustment amount; In this embodiment, the initial pulling speed is preset The value is m / min, preset adjustment The value is 5, and the purpose of setting is to control the adjustment range of the pulling speed. As other embodiments, the implementer can set it according to the actual situation, and the embodiment does not specially limit it.

[0054] Therefore, by dynamically adjusting the pulling speed at different sampling moments, the cable core surface is uniformly coated and dried and cured by the coating and drying mechanism, and the anti-interference ability of the shielding data cable is improved.

[0055] Based on the same inventive concept as the above method, the embodiment of the present application also provides an intelligent control system for shielding data cable processing, which comprises a memory, a processor, and a computer program stored in the memory and running on the processor. When the processor executes the computer program, the steps of any one of the above-mentioned methods are implemented.

[0056] It should be understood that, although Figure 1 The steps in the flowchart are displayed in sequence according to the direction of the arrow, but these steps are not necessarily executed in sequence according to the direction of the arrow. Unless otherwise stated herein, the execution of these steps has no strict sequence limitation, and these steps can be executed in other orders. Moreover, Figure 1 At least part of the steps in the above embodiment can include multiple sub-steps or multiple stages, which are not necessarily executed at the same time, but can be executed at different times, and the execution order of these sub-steps or stages is not necessarily sequential, but can be executed alternately or alternately with at least part of other steps or sub-steps or stages of other steps.

[0057] The technical features of the above embodiments can be combined in any way. In order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, but as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the present application.

[0058] The above embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it should not be understood as a limitation of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, therefore, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present application, all within the protection scope of the technical scheme of the present application.

Claims

1. An intelligent control method for shielded data cable processing, characterized in that: The method comprises the following steps: After the cable core is coated with the shielding material by the coating and drying mechanism, the cable core within a preset length extending outward from the outlet position of the first processing tube of the coating and drying mechanism at the current sampling moment is recorded as the cable section to be tested. The temperature data of different positions on the surface of the cable section to be tested is obtained by an infrared thermal imager to form a temperature distribution sequence, and the coating thickness at each position at the current sampling moment is obtained; Perform a linear fit on all temperatures in the temperature distribution sequence, analyze the deviation of the linear fit, and the difference between the local change trend of all temperatures and the slope of the fitted line, and determine the first evaluation value at the current sampling moment; Obtaining a thickness distribution sequence based on the coating thickness measured at the current sampling moment when the cable section to be tested passes through the exit position of the first processing tube; Calculate the second evaluation value at the current sampling moment based on the difference between the change trend of adjacent elements in the thickness distribution sequence and the change trend of adjacent elements in the temperature distribution sequence at the current sampling moment; Based on the discrete situation of the coating thickness in different directions at the current sampling moment, as well as the first evaluation value and the second evaluation value, the adjustment coefficient of the current sampling moment is determined, and the pulling speed of the coating and drying mechanism is adjusted in real time to obtain the adjusted pulling speed at the next sampling moment, and the shielded data cable processing process is controlled.

2. The intelligent control method for processing shielded data cables according to claim 1, characterized in that: The process of obtaining the temperature distribution sequence is as follows: an infrared thermal imager is deployed above the outlet of the first processing tube, and an imaging thermal image of the surface of the cable section to be tested at the current sampling moment is obtained by the infrared thermal imager; temperature data at different positions along the length direction of the cable core in the imaging thermal image are selected and arranged in descending order according to the distance from the outlet of the first processing tube to form a temperature distribution sequence at the current sampling moment.

3. The intelligent control method for processing shielded data cables according to claim 1, characterized in that: The method of obtaining the coating thickness at each position at the current sampling moment includes: deploying a laser sensor at each position at the outlet of the first processing tube, and obtaining the coating thickness at each position on the cross section of the cable core at the outlet of the first processing tube at the current sampling moment through the laser sensor at each position.

4. The intelligent control method for processing shielded data cables according to claim 1, characterized in that: Determining the first evaluation value at the current sampling moment includes: Performing linear fitting on all elements in the temperature distribution sequence, and calculating the slope of the fitting line and the fitting error; Obtaining the maximum and minimum values ​​of all elements in the temperature distribution sequence; selecting the largest maximum value and the smallest minimum value in the temperature distribution sequence; Calculate the relative rate of change based on the rate of change between the maximum value and the minimum value; Calculate the difference between the relative rate of change and the slope, and record it as the trend difference; The first evaluation value is the product of the fitting error and the trend difference.

5. The intelligent control method for processing shielded data cables according to claim 4, characterized in that: The calculation of the relative rate of change comprises: Calculate the difference between the maximum value and the minimum value, and record it as the relative temperature difference; The difference between the position number corresponding to the maximum maximum value and the position number corresponding to the minimum minimum value in the temperature distribution sequence is recorded as the sequence number difference; The relative change rate is the ratio of the relative temperature difference to the sequence number difference.

6. The intelligent control method for processing shielded data cables according to claim 3, characterized in that: The process of obtaining the thickness distribution sequence is as follows: Select the position of the laser sensor that is in the same position as the infrared thermal imager and record it as the main position; All coating thicknesses measured at the main position when the cable section to be measured passes through the first processing tube outlet before the current sampling moment are combined in chronological order to form a thickness distribution sequence at the current sampling moment.

7. The intelligent control method for processing shielded data cables according to claim 1, characterized in that: The calculating the second evaluation value at the current sampling moment includes: Normalizing all elements in the thickness distribution sequence and the temperature distribution sequence respectively, and recording the ratio between each element in the normalized thickness distribution sequence and its previous element as the relative thickness ratio; Calculating the product of each element in the normalized temperature distribution sequence and a preset attenuation coefficient, and recording the ratio of the product to the previous element of each element in the normalized temperature distribution sequence as a relative temperature ratio; The sum of all differences between the relative thickness ratios and the relative temperature ratios is used as a second evaluation value at a current sampling moment.

8. The intelligent control method for processing shielded data cables according to claim 1, characterized in that: Determining the adjustment coefficient of the current sampling moment includes: Calculating a cumulative sum of the first evaluation value and the second evaluation value; The adjustment coefficient is a normalized result of the product of the discrete degree of the coating thickness in all directions at the current sampling moment and the cumulative sum.

9. The intelligent control method for processing shielded data cables according to claim 1, characterized in that: No. Adjusted pulling speed at each sampling moment The calculation formula is: ,in, To preset the initial pulling speed, For the The adjustment coefficient of each sampling moment, is the preset adjustment amount.

10. An intelligent control system for shielded data cable processing, comprising a memory, a processor, and a computer program stored in the memory and running on the processor, characterized in that: When the processor executes the computer program, the processor implements the steps of the intelligent control method for processing a shielded data cable as described in any one of claims 1 to 9.

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