System and method for controlling and stabilizing optical fiber excess length of multi-core Mini optical cable

Abstract

The invention relates to the field of optical fiber excess length control, in particular to a multi-core Mini optical cable optical fiber excess length control and stabilization system and method. Comprising an excess length control module and an excess length stabilizing module, the excess length control module is used for adjusting the excess length, and the excess length stabilizing module is used for keeping the excess length stable. The excess length control module can control the excess length relative length of the optical fiber in the sheath according to the number of winding turns through a branching guide wheel set composed of an excess length wheel and a plurality of guide wheels, the effect of controlling the excess length of the optical fiber is achieved, and after the relative excess length of the optical fiber is controlled, the excess length stabilizing module is additionally arranged on the optical cable take-up equipment, so that the optical fiber take-up efficiency is improved. By means of the module, the optical cable is collected into the reel in a stable take-up state so that take-up can be continuously kept in the state that the excess length of the optical fiber is stable, and in addition, the excess length stabilizing module can further release stress borne by the optical fiber in the production process. And the excess length of the optical fiber is further stably controlled, so that the qualified rate of cabled products is improved.

Description

Background Art

[0002] Multi-core mini optical cable is a kind of optical cable designed for high-density wiring environment. It is characterized by small size, light weight, and can support multiple optical fibers to transmit data simultaneously. This type of optical cable is very suitable for use in places with limited space, such as inside data centers, between server racks, or integrated wiring in buildings.

[0003] When multi-core Mini optical cables are produced, the optical fibers inside the cables are of a loose tube structure and occupy a relatively large space. Each bare optical fiber has a certain amount of space to move in the loose tube. If the excess length of the optical fiber is too long, the optical fiber will be naturally bent. In the subsequent preparation process, the bare optical fibers will cross and squeeze each other due to the action of mechanical force, which will lead to obvious additional attenuation values ​​for the optical fibers after cabling. If the excess length of the optical fiber is too short, the optical fiber will be subjected to tensile stress, resulting in increased optical fiber loss or even damage.

[0004] Therefore, how to reduce the additional attenuation of optical fiber is an important issue in the production of optical cables. The production line of multi-core mini optical cables in the existing technology cannot better control the excess length of optical fibers during the production process, resulting in a low qualified rate of finished products. Summary of the invention

[0005] In view of this, the present invention provides a multi-core Mini optical cable optical fiber excess length control and stabilization system and method, which at least partially solves the problems existing in the prior art.

[0006] According to one aspect of the present invention, a multi-core Mini optical cable optical fiber excess length control and stabilization system is provided, comprising: an excess length control module and an excess length stabilization module, the excess length control module is arranged at a cable skin cooling and shaping station of a multi-core Mini optical cable production line, and is used to adjust the excess length, and the excess length stabilization module is used to be arranged at a packaging and winding station of a multi-core Mini optical cable production line, and is used to keep the excess length stable.

[0007] The excess length control module includes: an excess length wheel, a line dividing guide wheel group, a cooling water device and a first bracket.

[0008] The excess length wheel, the branching guide wheel group and the cooling water device are all arranged on the first bracket, the excess length wheel and the branching guide wheel group are arranged in parallel and aligned, the multi-core Mini optical cable is wound on the integral winding formed by the excess length wheel and the branching guide wheel group, and the water outlet of the cooling water device faces the excess length wheel, which is used to cool the multi-core Mini optical cable wound on the excess length wheel. The branching guide wheel group includes at least one branching guide wheel.

[0009] The excess length stabilization module includes: a wire take-up reel, a first guide wheel, a second guide wheel, a third guide wheel, a fourth guide wheel and a second bracket.

[0010] The second bracket is sleeved on the outside of the take-up reel, and the second bracket reciprocates along the rotation axis of the take-up reel. The first guide wheel, the second guide wheel, the third guide wheel and the fourth guide wheel are all rotatably arranged on the second bracket, and the first guide wheel, the second guide wheel, the third guide wheel and the fourth guide wheel are respectively located at multiple different positions on the periphery of the take-up reel, and are used to form a wire loop with an equivalent diameter greater than the diameter of the take-up reel. After the multi-core Mini optical cable passes through the wire loop formed by the first guide wheel, the second guide wheel, the third guide wheel and the fourth guide wheel, it is wound on the take-up reel.

[0011] Furthermore, the cable skin cooling and shaping station includes a first cooling water tank and a second cooling water tank. The first cooling water trough and the second cooling water trough are arranged at intervals, the excess length control module is arranged between the first cooling water trough and the second cooling water trough, and the cooling water temperature in the first cooling water trough is greater than or equal to the cooling water temperature in the second cooling water trough.

[0012] Furthermore, both side walls of the excess length wheel are provided with annular walls protruding outwards to form a groove with the circumferential wall of the excess length wheel.

[0013] Furthermore, a plurality of wire grooves are arranged in parallel on the circumferential outer wall of the wire dividing guide wheel.

[0014] Furthermore, the multi-core Mini optical cable is introduced into the take-up reel in a tangential direction.

[0015] Furthermore, the multi-core Mini optical cable has a loose tube structure, and the duty cycle is greater than a preset duty cycle threshold.

[0016] According to another aspect of the present invention, a method for controlling and stabilizing excess length of a multi-core Mini optical cable is provided, which is used to determine the water outlet temperature and flow rate of a cooling water device in a multi-core Mini optical cable excess length control and stabilization system.

[0017] The excess length control and stabilization methods include: Obtain the production feature data set corresponding to the target multi-core Mini optical cable. The production feature data set includes the number of optical fiber cores, optical fiber model, optical fiber outer diameter, cable air ratio, optical fiber pay-off tension, cable sheath material, ratio of mold inner hole diameter to cable diameter, temperature of the optical cable when it enters the excess length control module, number of turns of the optical cable on the excess length wheel, temperature of the optical cable when it enters the excess length stabilization module, take-up reel shaft diameter, and equivalent diameter of the wire ring.

[0018] The production feature data set is input into the target prediction model to generate the outlet water temperature and flow rate of the cooling water device corresponding to the target multi-core Mini optical cable.

[0019] The target prediction model is generated according to the following steps: Based on historical production data, multiple initial training data sets are obtained, and the feature dimensions in the initial training data sets are the same as the feature dimensions in the production feature data sets. The sample labels corresponding to the initial training data sets are the outlet water temperature and flow rate of the cooling water device.

[0020] Each feature dimension is normalized according to the data corresponding to each feature dimension in all initial training data sets.

[0021] Obtain the correlation coefficient between each characteristic dimension and the optical fiber attenuation value.

[0022] The correlation coefficient of each feature dimension is used as the adjustment weight to adjust the normalized value to generate the target training data set.

[0023] According to the optical fiber attenuation value of the multi-core Mini optical cable produced corresponding to each target training data set, the target training data set is divided into a positive sample set and a negative sample set.

[0024] The initial prediction model is trained using the positive sample set and the negative sample set to generate the target prediction model. The initial prediction model is a model suitable for regression tasks.

[0025] Furthermore, each feature dimension is normalized according to the data corresponding to each feature dimension in all initial training data sets, including: The normalization process meets the following conditions: X g =(XX min ) / (X max -X min ).

[0026] Among them, X g is the normalized value corresponding to X, X max and X min are respectively the maximum and minimum values ​​in the feature dimension to which the value X to be normalized belongs.

[0027] Furthermore, the correlation coefficient between each characteristic dimension and the optical fiber attenuation value is obtained, including: Obtain the Pearson correlation coefficient between each characteristic dimension and the fiber attenuation value.

[0028] Based on all Pearson correlation coefficients, the adjustment weight of each characteristic dimension and the fiber attenuation value is generated. The correlation coefficient meets the following conditions: .

[0029] Among them, P i is the correlation coefficient between the i-th characteristic dimension and the fiber attenuation value, K i P iThe corresponding adjustment weights, n is the number of feature dimensions in the initial training data set, i=1, 2…n.

[0030] Furthermore, the initial prediction model is a fully connected neural network or a decision tree or a random forest.

[0031] The technical solution of the present invention has at least the following beneficial effects: Usually, after the optical fiber comes out of the pay-off wheel, a certain tension is applied to it. After passing through the sheath mold, the outside of the optical fiber will be wrapped with a sheath. However, since the sheath (i.e., cable skin) is extruded through the mold, there is generally no tension on the sheath. In this state, the length of the optical fiber will basically remain less than the length of the sheath, which is the negative excess length (excess length = (optical fiber length-sheath length) / sheath length). However, when the cable passes through the subsequent cooling station, the sheath will shrink to a certain extent, which will cause the length of the optical fiber to be greater than the sheath length, which is the positive excess length. And because the shrinkage of the sheath is uncontrollable, the amplitude of the excess length will usually increase, and then exceed the normal excess length range. In actual use, the positive excess length will easily cause the optical fiber to bend in the sheath, thereby increasing the attenuation value of the optical fiber. In addition, the sheath will shrink to a certain extent after the take-up is completed, so if the excess length of the newly prepared optical cable is in a small negative state, it may become a positive excess length again during the subsequent sheath shrinkage process. Therefore, in order to prevent the subsequent occurrence of positive excess length, the excess length of the optical cable just prepared needs to be controlled in a relatively larger negative excess length state to achieve lower optical fiber attenuation performance.

[0032] In the present invention, the optical cable is wound on the excess length wheel and the branching guide wheel group. Since the empty space inside the optical cable accounts for a large proportion and the filler is soft, when the optical cable is wound on the overall winding, the optical fiber will move to the side closer to the circumferential surface of the excess length wheel and the branching wheel, while the outer side of the sliding sleeve is on the side farther away from the circumferential surface of the excess length wheel and the branching wheel group. Therefore, according to the runway effect (the length of the inner circle is shorter than the length of the outer circle), it can be known that in the excess length control module, compared with the optical fiber, the sheath will be subject to the force that limits its contraction, thereby further reducing the retraction of the sheath. The excess length value generated between the sheath and the optical fiber can be controlled by the number of turns of the optical cable, and the excess length can be controlled in a reasonable negative value range, so as to achieve the control of the excess length change caused by the shrinkage of the sheath during the cooling process.

[0033] At the same time, by providing a cooling water device, the cooling and shaping of the sheath can be further accelerated, the shrinkage of the sheath can be reduced, and the effect of controlling the change of the excess length can be achieved at the same time. In addition, the cold-short length of the optical cable can be increased, and the length of the cooling water tank in the prior art can be reduced.

[0034] Thirdly, in the excess length stabilization module, by setting the first guide wheel, the second guide wheel, the third guide wheel and the fourth guide wheel on the outside of the take-up reel, a wire loop with a larger equivalent diameter is formed before the optical cable is wound into the take-up reel. Therefore, during the take-up process, the optical cable first passes through the wire loop and then winds onto the reel. Since the excess length of the optical fiber in the optical cable is locked in advance due to the restriction of the wire loop, the excess length of the optical fiber will not change due to the increase in the diameter of the winding coil during the subsequent winding process. This structural setting is similar to the effect of a stop valve in a water pipe, so as to further stabilize the excess length of the optical fiber and improve the qualified rate of the product after the cable is formed. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1 This is a partial structural diagram of an existing multi-core Mini optical cable production line.

[0037] Figure 2 This is a schematic diagram of the structure of the excess length control module in an embodiment of the present application at a cable sheath cooling and shaping station of a multi-core Mini optical cable production line.

[0038] Figure 3 Schematic diagram of the structure of the excess length control module in one embodiment of the present application.

[0039] Figure 4 Schematic diagram of the structure of the excess length stabilization module in one embodiment of the present application.

[0040] Figure 5 This is an experimental diagram showing the excess length of optical fibers of the prepared optical cables when preparing optical cables of the same specification in one embodiment of the present application, where a portion of the optical cables passes through the excess length control module in the present embodiment, and the other portion does not pass through the excess length control module in the present embodiment, and the subsequent other preparation steps are kept the same; Figure 6 It is a flow chart of a method for controlling and stabilizing excess length of optical fibers in a multi-core Mini optical cable in another embodiment of the present application.

[0041] Reference numerals 1. Pay-off module; 2. Sheath preparation module; 3. Cooling module; 31. First cooling water trough; 32. Second cooling water trough; 4. Excess length control module; 41. Excess length wheel; 42. Branching guide wheel; 43. Cooling water device; 44. First bracket; 45. Annular wall; 5. Take-up module; 51. Second bracket; 52. First guide wheel; 53. Second guide wheel; 54. Third guide wheel; 55. Fourth guide wheel; 56. Take-up reel; 6. Optical cable. DETAILED DESCRIPTION

[0042] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0043] It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict. Moreover, all other embodiments obtained by ordinary technicians in the field without creative work based on the embodiments in the present disclosure are within the scope of protection of the present disclosure.

[0044] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein may be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on the present disclosure, it should be understood by those skilled in the art that an aspect described herein may be implemented independently of any other aspect, and two or more of these aspects may be combined in various ways. For example, any number of aspects described herein may be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein may be used to implement this device and / or practice this method.

[0045] As an embodiment of the present invention, Figures 1 to 5 As shown, a multi-core Mini optical cable optical fiber excess length control and stabilization system is provided, including: an excess length control module 4 and an excess length stabilization module. The excess length control module 4 is arranged at the cable skin cooling and shaping station of the multi-core Mini optical cable production line to adjust the excess length. The excess length stabilization module is used to be arranged at the packaging and winding station of the multi-core Mini optical cable production line to keep the excess length stable.

[0046] Specifically, Figure 1 and Figure 2 As shown, the multi-core Mini optical cable includes a pay-off module 1, a sheath preparation module 2, a cooling module 3 and a take-up module 5. The pay-off module 1 is used to pay out the optical fiber and coat the outer side of the optical fiber with a protective layer (usually aramid yarn), the sheath preparation module 2 is used to extrude the outer sheath of the optical cable 6 and attach it to the outer side of the protective layer, and the cooling module 3 is used to cold-shape the extruded outer sheath by water cooling. The take-up module 5 is used to roll up and pack the prepared optical cable 6.

[0047] In this embodiment, the excess length control module 4 is arranged in the cable skin cooling and shaping station of the multi-core Mini optical cable production line, such as Figure 2 As shown, the excess length control module 4 includes: an excess length wheel 41 , a line dividing guide wheel group, a cooling water device 43 and a first bracket 44 .

[0048] The excess length wheel 41, the line dividing guide wheel group and the cooling water device 43 are all arranged on the first bracket 44. The excess length wheel 41 is arranged parallel and aligned with the line dividing guide wheel group. The multi-core Mini optical cable is wound on the integral winding formed by the excess length wheel 41 and the line dividing guide wheel group. The water outlet of the cooling water device 43 faces the excess length wheel 41, and is used to cool the multi-core Mini optical cable wound on the excess length wheel 41. The line dividing guide wheel group includes at least one line dividing guide wheel 42; specifically, the number and position of the line dividing guide wheels 42 included in the line dividing guide wheel group can be set according to actual conditions.

[0049] In this embodiment, the optical cable 6 is wound on the excess length wheel 41 and the branching guide wheel assembly. Since the multi-core Mini optical cable belongs to a loose sleeve structure, the empty space inside the optical cable 6 is relatively large and the filler is soft, so when the optical cable 6 is wound on the overall winding, the optical fiber will move to the side closer to the circumference of the excess length wheel 41 and the branching guide wheel 42, while the outer side of the sliding sleeve is located on the side farther away from the circumference of the excess length wheel 41 and the branching guide wheel 42. Therefore, according to the runway effect (the length of the inner circle is shorter than the length of the outer circle), it can be known that in the excess length control module, the excess length value generated between the sheath and the optical fiber is controlled by the number of turns of the optical cable 6, so as to achieve the control of the excess length change caused by the shrinkage of the sheath during the cooling process.

[0050] In this embodiment, if Figure 2 As shown, the cable skin cooling and shaping station (ie, the cooling module 3 ) includes a first cooling water tank 31 and a second cooling water tank 32 .

[0051] The first cooling water tank 31 and the second cooling water tank 32 are arranged at intervals, the excess length control module 4 is arranged between the first cooling water tank 31 and the second cooling water tank 32, and the cooling water temperature in the first cooling water tank 31 is greater than or equal to the cooling water temperature in the second cooling water tank 32. Specifically, the cooling water temperature can be adjusted and set according to actual conditions, such as the cooling water temperature in the first cooling water tank 31 can be 35°C, and the cooling water temperature in the second cooling water tank 32 can be 25°C.

[0052] In addition, if Figure 3As shown, both side walls of the excess length wheel 41 are provided with an annular wall 45 protruding outward to enclose a groove with the circumferential wall of the excess length wheel 41. The groove can prevent the cooling water from flowing sideways, and then flow along the circumferential wall to improve the cooling effect. The water temperature of the cooling water device 43 in this embodiment can be adjusted according to actual conditions, such as 35°C. By providing the cooling water device 43, the cooling and shaping of the jacket can be further accelerated, the shrinkage of the jacket can be reduced, and the effect of controlling the change of the excess length can be achieved at the same time.

[0053] At the same time, a plurality of wire grooves are arranged in parallel on the circumferential outer wall of the wire distribution guide wheel. Thus, the optical cable 6 can be wound more turns on the overall winding as needed, so as to increase the influence range of the runway effect according to actual needs, and then adjust and control the excess length. In addition, the cold-shortage length of the optical cable 6 can be increased, the length of the cooling water tank in the prior art can be reduced, and the space occupied by the site can be reduced.

[0054] Specifically, in this embodiment, when preparing an optical cable 6 of the same specification (optical fiber tension is 200g, aramid fiber in the optical cable 6 is 3x1100, outer diameter of the optical cable 6 is 3.0mm, and wall thickness is 0.7mm), a part of it passes through the excess length control module 4 in this embodiment, and the other part does not pass through the excess length control module 4 in this embodiment, and the other subsequent preparation steps are kept the same, and the optical fiber excess length of the prepared optical cable 6 is measured. Specifically, the optical fiber excess length is shown as follows: Figure 5 Specifically, according to Figure 5 From the comparison results in , it can be seen that the more turns the optical cable 6 is wound around the excess length wheel 41, the smaller the excess length of the optical fiber is, and after using the excess length control module 4, the excess length of the optical fiber is more stable, and the excess length can be controlled at a more reasonable negative value by changing the number of turns of winding as needed. Therefore, in the multi-core Mini optical cable manufacturing process, the excess length wheel 41 of the multi-wheel group can be designed according to the production line conditions to control the excess length of the optical fiber and improve the additional attenuation of the optical fiber.

[0055] Again, in this embodiment, the existing take-up module 5 is replaced by the excess length stabilization module in this embodiment. Specifically, the excess length stabilization module includes: a take-up reel 56, a first guide wheel 52, a second guide wheel 53, a third guide wheel 54, a fourth guide wheel 55 and a second bracket 51.

[0056] like Figure 4As shown, the second bracket 51 is sleeved on the outside of the take-up reel 56, and the second bracket 51 reciprocates along the rotation axis of the take-up reel 56. The first guide wheel 52, the second guide wheel 53, the third guide wheel 54 and the fourth guide wheel 55 are all rotatably arranged on the second bracket 51, and the first guide wheel 52, the second guide wheel 53, the third guide wheel 54 and the fourth guide wheel 55 are respectively located at multiple different positions on the periphery of the take-up reel 56, and are used to form a wire loop with an equivalent diameter greater than the diameter of the take-up reel 56. After passing through the wire loop formed by the first guide wheel 52, the second guide wheel 53, the third guide wheel 54 and the fourth guide wheel 55, the multi-core Mini optical cable is wound on the take-up reel 56.

[0057] In this embodiment, the second bracket 51 can be set as a ring frame of various shapes, such as a circle and a polygon, etc. In this embodiment, it is specifically set as a square, and the number of guide wheels can also be set more practically. Its main function is to form a wire ring with a larger equivalent diameter on the outside of the take-up reel 56 (specifically a reel) through multiple guide wheels. Specifically, the equivalent diameter is usually recommended to be greater than 10 cm.

[0058] By forming a wire loop of a larger equivalent diameter on the outside of the take-up reel 56, the optical cable 6 can pass through the wire loop before being wound onto the reel during the take-up process. Since the wire loop is locked in advance to limit the excess length of the optical fiber in the optical cable 6, the excess length of the optical fiber will not change due to the increase in the diameter of the winding reel during the subsequent winding and winding process. This structural setting is similar to the effect of a stop valve in a water pipe, which can further stably control the excess length of the optical fiber and improve the qualified rate of the product after cabling.

[0059] In addition, compared with the existing production device that directly takes up the wire through the take-up reel 56, a wire ring is installed on the outside of the take-up reel 56, and the optical cable 6 can be taken into the reel in a stable take-up state through the wire ring. At the same time, compared with the problem that the optical fiber bending radius is affected when the optical cable 6 is added during the take-up process of the existing reel, the excess length stabilization module in this embodiment can increase the bending radius of the optical fiber when taking up the wire, and continue to take up the wire in a stable state. In addition, the excess length stabilization module can further release the stress on the optical fiber.

[0060] Preferably, the multi-core Mini optical cable is introduced into the take-up reel 56 in a tangential direction. Figure 3 As shown, specifically, in this embodiment, the multi-core Mini optical cable can be introduced into the take-up reel 56 at an angle of 45° to the horizontal direction.

[0061] The existing take-up device does not use an excess length stabilizing module. During the take-up process of the optical cable 6, the optical cable 6 is ideally always horizontally and tangentially received in the reel. However, during the take-up process, as the optical cable 6 is gradually taken up, the bending radius of the optical cable 6 changes from large to small, and the optical fiber will also bend accordingly in the sheath. In the present embodiment, the excess length stabilizing module uses a 45° angle to guide the take-up reel, so that during the take-up process of the optical cable 6, the bending radius of the optical cable 6 can be kept within a relatively stable range when it is received in the reel, so as to further stabilize the excess length of the optical fiber in the sheath, and at the same time reduce the stress effect on the optical fiber caused by the increase in the take-up angle during the take-up process.

[0062] In this embodiment, the excess length control module 4 and the excess length stabilization module together constitute an excess length control and stabilization system. The excess length control module 4 can control the relative length of the excess length of the optical fiber in the sheath through the excess length wheel 41 and the branching guide wheel, so as to control the excess length of the optical fiber. After controlling the relative excess length of the optical fiber, the optical cable 6 is equipped with an excess length stabilization module on the winding device. Through this module, the optical cable 6 is put into the reel in a stable winding state, so as to continuously keep the optical fiber in a stable state for winding. In addition, the excess length stabilization module can further release the stress on the optical fiber.

[0063] According to another aspect of the present invention, Figure 6 As shown, a method for controlling and stabilizing excess length of a multi-core Mini optical cable is provided, which is used to determine the outlet water temperature and flow rate of a cooling water device 43 in a multi-core Mini optical cable excess length control and stabilization system.

[0064] The excess length control and stabilization methods include: S100: Obtain a production feature data set corresponding to the target multi-core Mini optical cable. The production feature data set includes the number of optical fiber cores, the optical fiber model, the outer diameter of the optical fiber part, the empty ratio of the optical cable 6, the pay-off tension of the optical fiber, the cable sheath material, the ratio of the mold inner hole diameter to the diameter of the optical cable 6, the temperature of the optical cable 6 when entering the excess length control module 4, the number of winding turns of the optical cable 6 on the excess length wheel 41, the temperature of the optical cable 6 when entering the excess length stabilization module, the diameter of the shaft barrel of the take-up reel 56, and the equivalent diameter of the wire loop.

[0065] S200: Input the production feature data set into the target prediction model to generate the outlet water temperature and flow rate of the cooling water device 43 corresponding to the target multi-core Mini optical cable.

[0066] The target prediction model is generated according to the following steps: S201: Based on historical production data, multiple initial training data sets are obtained, wherein the feature dimensions in the initial training data sets are the same as the feature dimensions in the production feature data sets. The sample labels corresponding to the initial training data sets are the outlet water temperature and flow rate of the cooling water device 43 .

[0067] S202: Normalize each feature dimension according to the data corresponding to each feature dimension in all initial training data sets.

[0068] Specifically, the normalization process in S202 satisfies the following conditions: X g =(XX min ) / (X max -X min ).

[0069] Among them, X g is the normalized value corresponding to X, X max and X min are respectively the maximum and minimum values ​​in the feature dimension to which the value X to be normalized belongs.

[0070] In this step, each feature dimension is normalized separately to avoid the deviation of attention during model training due to different value ranges of different feature dimensions. In addition, for some feature dimensions that only represent types (such as fiber model and cable sheath material), the qualities can be replaced with attribute parameters related to the fiber attenuation value. For example, the fiber model can use the bending resistance or maximum attenuation coefficient of the fiber, and the cable sheath material can use its shrinkage rate during cold shaping.

[0071] S203: Obtain the correlation coefficient between each characteristic dimension and the optical fiber attenuation value.

[0072] Specifically, S203 includes: S213: Obtain the Pearson correlation coefficient between each characteristic dimension and the optical fiber attenuation value.

[0073] Specifically, the Pearson correlation coefficient may be calculated using a feature data set corresponding to each feature dimension formed by the historical data and a data set of optical fiber attenuation values ​​formed by the historical data to obtain the corresponding Pearson correlation coefficient.

[0074] S223: Generate adjustment weights for each feature dimension and optical fiber attenuation value based on all Pearson correlation coefficients. The correlation coefficients satisfy the following conditions: .

[0075] Among them, P i is the correlation coefficient between the i-th characteristic dimension and the fiber attenuation value, K i P i The corresponding adjustment weights, n is the number of feature dimensions in the initial training data set, i=1, 2…n.

[0076] Before model training, a weight is assigned to each feature based on the importance between each feature dimension and the result to explicitly adjust its importance, which can guide the model to more effectively capture the impact of each feature and thus improve the model's prediction accuracy.

[0077] S204: Using the correlation coefficient of each feature dimension as an adjustment weight, the normalized value is adjusted to generate a target training data set.

[0078] S205: According to the optical fiber attenuation value of the multi-core Mini optical cable produced corresponding to each target training data set, the target training data set is divided into a positive sample set and a negative sample set.

[0079] S206: Use the positive sample set and the negative sample set to train the initial prediction model to generate a target prediction model. The initial prediction model is a model suitable for regression tasks. Specifically, the initial prediction model can be a fully connected neural network, a decision tree, or a random forest.

[0080] In this embodiment, historical data can be used to generate positive and negative training sample sets to train the model, so that the model can generate water outlet temperature and flow rate of the cooling water device 43 in the excess length control module 4 that are more suitable for the current production of the optical cable 6, so as to further ensure that the optical cable 6 prepared under this parameter has a smaller optical fiber attenuation value, so as to improve the qualified rate of the optical cable 6.

[0081] In addition, although the steps of the method in the present disclosure are described in a specific order in the drawings, this does not require or imply that the steps must be performed in this specific order, or that all the steps shown must be performed to achieve the desired results. Additionally or alternatively, some steps may be omitted, multiple steps may be combined into one step, and / or one step may be decomposed into multiple steps, etc.

[0082] Through the description of the above implementation, it is easy for those skilled in the art to understand that the example implementation described here can be implemented by software, or by combining software with necessary hardware. Therefore, the technical solution according to the implementation of the present disclosure can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.) or on a network, and includes several instructions to enable a computing device (which can be a personal computer, a server, a mobile terminal, or a network device, etc.) to execute the method according to the implementation of the present disclosure.

[0083] In an exemplary embodiment of the present disclosure, an electronic device capable of implementing the above method is also provided.

[0084] It will be appreciated by those skilled in the art that various aspects of the present invention may be implemented as a system, method or program product. Therefore, various aspects of the present invention may be specifically implemented in the following forms, namely: a complete hardware implementation, a complete software implementation (including firmware, microcode, etc.), or a combination of hardware and software, which may be collectively referred to herein as a "circuit", "module" or "system".

[0085] The electronic device according to this embodiment of the present invention is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present invention.

[0086] The electronic device is presented in the form of a general-purpose computing device. The components of the electronic device may include, but are not limited to: the at least one processor mentioned above, the at least one storage device mentioned above, and a bus connecting different system components (including storage devices and processors).

[0087] The storage stores program codes, which can be executed by the processor, so that the processor executes the steps according to various exemplary embodiments of the present invention described in the above “Exemplary Method” section of this specification.

[0088] The memory may include readable media in the form of volatile memory, such as random access memory (RAM) and / or cache memory, and may further include read only memory (ROM).

[0089] The storage may also include a program / utility having a set (at least one) of program modules, such program modules including but not limited to: an operating system, one or more application programs, other program modules, and program data, each of which or some combination may include an implementation of a network environment.

[0090] The bus may represent one or more of several types of bus structures including a memory bus or memory controller, a peripheral bus, an accelerated graphics port, a processor, or a local bus using any of a variety of bus architectures.

[0091] The electronic device may also communicate with one or more external devices (e.g., keyboards, pointing devices, Bluetooth devices, etc.), may communicate with one or more devices that enable a user to interact with the electronic device, and / or may communicate with any device that enables the electronic device to communicate with one or more other computing devices (e.g., routers, modems, etc.). This communication may be performed through an input / output (I / O) interface. In addition, the electronic device may also communicate with one or more networks (e.g., local area networks (LANs), wide area networks (WANs), and / or public networks, such as the Internet) through a network adapter. The network adapter communicates with other modules of the electronic device through a bus. It should be understood that, although not shown in the figure, other hardware and / or software modules may be used in conjunction with the electronic device, including but not limited to: microcode, device drivers, redundant processors, external disk drive arrays, RAID systems, tape drives, and data backup storage systems, etc.

[0092] Through the description of the above implementation, it is easy for those skilled in the art to understand that the example implementation described here can be implemented by software, or by software combined with necessary hardware. Therefore, the technical solution according to the implementation of the present disclosure can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.) or on a network, and includes a number of instructions to enable a computing device (which can be a personal computer, a server, a terminal device, or a network device, etc.) to execute the method according to the implementation of the present disclosure.

[0093] In an exemplary embodiment of the present disclosure, a computer-readable storage medium is also provided, on which a program product capable of implementing the above method of the present specification is stored. In some possible implementations, various aspects of the present invention can also be implemented in the form of a program product, which includes a program code, and when the program product is run on a terminal device, the program code is used to enable the terminal device to execute the steps according to various exemplary embodiments of the present invention described in the above "Exemplary Method" section of the present specification.

[0094] The program product may be any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. The readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination thereof. More specific examples (non-exhaustive list) of readable storage media include: an electrical connection with one or more wires, a portable disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof.

[0095] Computer readable signal media may include data signals propagated in baseband or as part of a carrier wave, in which readable program code is carried. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. Readable signal media may also be any readable medium other than a readable storage medium, which may send, propagate, or transmit a program for use by or in conjunction with an instruction execution system, apparatus, or device.

[0096] The program code contained on the readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wired, optical cable, RF, etc., or any suitable combination of the foregoing.

[0097] Program code for performing the operations of the present invention may be written in any combination of one or more programming languages, including object-oriented programming languages ​​such as Java, C++, etc., and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user computing device, partially on the user device, as a separate software package, partially on the user computing device and partially on a remote computing device, or entirely on a remote computing device or server. In the case of a remote computing device, the remote computing device may be connected to the user computing device through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computing device (e.g., via the Internet using an Internet service provider).

[0098] In addition, the above-mentioned figures are only schematic illustrations of the processes included in the method according to an exemplary embodiment of the present invention, and are not intended to be limiting. It is easy to understand that the processes shown in the above-mentioned figures do not indicate or limit the time sequence of these processes. In addition, it is also easy to understand that these processes can be performed synchronously or asynchronously, for example, in multiple modules.

[0099] It should be noted that, although several modules or units of the device for action execution are mentioned in the above detailed description, this division is not mandatory. In fact, according to the embodiments of the present disclosure, the features and functions of two or more modules or units described above can be embodied in one module or unit. On the contrary, the features and functions of one module or unit described above can be further divided into multiple modules or units to be embodied.

[0100] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A multi-core Mini optical cable optical fiber excess length control and stabilization system, characterized in that: include: An excess length control module and an excess length stabilization module. The excess length control module is arranged at the cable skin cooling and shaping station of the multi-core Mini optical cable production line to adjust the excess length. The excess length stabilization module is arranged at the packaging and wire-receiving station of the multi-core Mini optical cable production line to keep the excess length stable. The excess length control module includes: an excess length wheel, a line dividing guide wheel group, a cooling water device and a first bracket; The excess length wheel, the branching guide wheel group and the cooling water device are all arranged on the first bracket, the excess length wheel is arranged parallel and aligned with the branching guide wheel group, the multi-core Mini optical cable is wound on the integral winding formed by the excess length wheel and the branching guide wheel group, the water outlet of the cooling water device faces the excess length wheel, and is used to cool the multi-core Mini optical cable wound on the excess length wheel; the branching guide wheel group includes at least one branching guide wheel; The excess length stabilization module includes: a take-up reel, a first guide wheel, a second guide wheel, a third guide wheel, a fourth guide wheel and a second bracket; The second bracket is sleeved on the outside of the take-up reel, and the second bracket reciprocates along the rotation axis of the take-up reel; the first guide wheel, the second guide wheel, the third guide wheel and the fourth guide wheel are all rotatably arranged on the second bracket, and the first guide wheel, the second guide wheel, the third guide wheel and the fourth guide wheel are respectively located at a plurality of different positions on the periphery of the take-up reel, and are used to form a wire loop with an equivalent diameter larger than the diameter of the take-up reel; the multi-core Mini optical cable is wound on the take-up reel after passing through the wire loop formed by the first guide wheel, the second guide wheel, the third guide wheel and the fourth guide wheel.

2. According to claim 1, a multi-core Mini optical cable optical fiber excess length control and stabilization system is characterized in that: The cable skin cooling and shaping station includes a first cooling water tank and a second cooling water tank. The first cooling water trough and the second cooling water trough are arranged at intervals, the excess length control module is arranged between the first cooling water trough and the second cooling water trough, and the cooling water temperature in the first cooling water trough is greater than or equal to the cooling water temperature in the second cooling water trough.

3. The multi-core Mini optical cable optical fiber excess length control and stabilization system according to claim 1 is characterized in that: Both side walls of the excess length wheel are provided with annular walls protruding outwards to form a groove with the circumferential wall of the excess length wheel.

4. The multi-core Mini optical cable optical fiber excess length control and stabilization system according to claim 3 is characterized in that: A plurality of wire grooves are arranged in parallel on the circumferential outer wall of the wire dividing guide wheel.

5. The multi-core Mini optical cable optical fiber excess length control and stabilization system according to claim 1 is characterized in that: The multi-core Mini optical cable is introduced into the take-up reel in a tangential direction.

6. The multi-core Mini optical cable optical fiber excess length control and stabilization system according to claim 1 is characterized in that: The multi-core Mini optical cable has a loose tube structure, and a duty cycle greater than a preset duty cycle threshold.

7. A method for controlling and stabilizing excess length of optical fiber in a multi-core Mini optical cable, characterized in that: Used to determine the outlet water temperature and flow rate of the cooling water device in the multi-core Mini optical cable optical fiber excess length control and stabilization system as described in any one of claims 1 to 6; The excess length control and stabilization method comprises: Obtain a production feature data set corresponding to the target multi-core Mini optical cable; the production feature data set includes the number of optical fiber cores, optical fiber model, optical fiber outer diameter, cable air ratio, optical fiber pay-off tension, cable sheath material, ratio of mold inner hole diameter to cable diameter, temperature of the optical cable when it enters the excess length control module, number of turns of the optical cable on the excess length wheel, temperature of the optical cable when it enters the excess length stabilization module, take-up reel shaft diameter, and equivalent diameter of the wire loop; Input the production characteristic data set into the target prediction model to generate the outlet water temperature and flow rate of the cooling water device corresponding to the target multi-core Mini optical cable; The target prediction model is generated according to the following steps: According to the historical production data, a plurality of initial training data sets are obtained, wherein the feature dimensions in the initial training data sets are the same as the feature dimensions in the production feature data sets; and the sample labels corresponding to the initial training data sets are the outlet water temperature and flow rate of the cooling water device; Normalize each feature dimension according to the data corresponding to each feature dimension in all initial training data sets; Obtain the correlation coefficient between each characteristic dimension and the optical fiber attenuation value; The correlation coefficient of each feature dimension is used as the adjustment weight to adjust the normalized value to generate the target training data set; According to the optical fiber attenuation value of the multi-core Mini optical cable produced corresponding to each target training data set, the target training data set is divided into a positive sample set and a negative sample set; The initial prediction model is trained using the positive sample set and the negative sample set to generate the target prediction model; the initial prediction model is a model suitable for regression tasks.

8. The method according to claim 7, characterized in that According to the data corresponding to each feature dimension in all initial training data sets, each feature dimension is normalized, including: The normalization process meets the following conditions: X g =(X-X min ) / (X max -X min ); Among them, X g is the normalized value corresponding to X, X max and X min are respectively the maximum and minimum values ​​in the feature dimension to which the value X to be normalized belongs.

9. The method according to claim 7, characterized in that: Get the correlation coefficient between each characteristic dimension and the fiber attenuation value, including: Obtain the Pearson correlation coefficient between each characteristic dimension and the optical fiber attenuation value; According to all Pearson correlation coefficients, the adjustment weight of each characteristic dimension and the optical fiber attenuation value is generated; the correlation coefficient satisfies the following conditions: ； Among them, P i is the correlation coefficient between the i-th characteristic dimension and the fiber attenuation value, K i P i The corresponding adjustment weights, n is the number of feature dimensions in the initial training data set, i=1, 2…n.

10. The method according to claim 7, characterized in that The initial prediction model is a fully connected neural network or a decision tree or a random forest.

Images