Fiber forming method and system based on composite conductive fiber spinneret

Abstract

The application discloses a fiber forming method and system based on a composite conductive fiber spinneret, relates to the technical field of fiber spinnerets, and comprises the following steps: setting current collection points in the central area and the edge area of the composite conductive fiber spinneret respectively, configuring an electric conductivity collection point near the outlet of the spinneret, collecting conductive original data in real time, transmitting the collected conductive original data to a control system through a data interaction module, and forming a standard conductive data set through data integrity detection and noise filtering and other preprocessing steps in the control system. Based on the standard conductive data set, the output electric field difference DE is calculated by using an Ohm's law rewriting formula, and the accurate calculation of the electric field difference DE can be realized. Compared with the traditional uniform current distribution mode, the method can ensure the reliability of the data and the accuracy of the electric field difference calculation through multi-point collection and data preprocessing, thereby effectively improving the stability and the fine degree of the electric field control in the fiber forming process.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fiber spinneret, in particular to a fiber forming method and system based on a composite conductive fiber spinneret. BACKGROUND

[0002] With the development of fiber material preparation technology, this field has a wide range of applications in composite materials, functional fibers and intelligent fibers. In polymer material processing, melt spinning technology is a core process that stretches polymer melt into fibers through a spinneret. In the sub-field of melt spinning technology, the fiber forming method based on composite conductive fiber spinneret has become the focus of research in recent years. This method introduces a conductive layer on the spinneret and applies an electric field, so that the fiber structure can be controlled during the forming process, thereby obtaining high-performance products such as core-shell fibers and gradient conductive fibers.

[0003] At present, in the existing fiber forming method, the spinneret is usually controlled in a uniform current distribution mode, that is, the same current density is applied on the entire spinneret. Although this method is simple, it has obvious limitations: because the electric field distribution is uniform in the center and edge areas, the molecular chains of the fiber can only produce overall consistent orientation during the forming process, making it difficult to form differentiated structures in the core-shell area or local area. This directly leads to a single internal structure of the fiber, insufficient functional coupling, and cannot meet the multi-level conductivity, mechanical property gradient or responsiveness requirements for high-performance fibers.

[0004] The main reason for the above-mentioned shortcomings is the single driving mechanism of the electric field, that is, the uniform current distribution fails to form an effective gradient in space. When this deficiency occurs, the fiber lacks driving force differentiation during the forming process, resulting in the molecular chains of the fiber core-shell layer being too close to form a clear core-shell boundary or gradient conductive area. As a result: the overall performance of the fiber tends to be homogeneous, with the electrical conductivity unable to be layered and controlled, the local mechanical performance being insufficiently strengthened, and the optical response being not obvious. Such abnormal effects not only reduce the application expansion of the fiber, but also restrict its popularization and application in intelligent textiles, sensing materials and functional composite fibers. SUMMARY

[0005] In view of the deficiencies of the prior art, the present application provides a fiber forming method and system based on a composite conductive fiber spinneret, which solves the problems mentioned in the background art.

[0006] To achieve the above purpose, the present application is implemented by the following technical scheme:

[0007] S1, a plurality of collection points are arranged around the composite conductive fiber spinneret, and relevant sensors are arranged in the collection points for real-time collection of conductive raw data of the central area; the collected conductive raw data is transmitted to the control system through a data interface, and the conductive raw data is preprocessed in the control system to obtain a standard conductive data set;

[0008] S2, based on the standard conductive data set, the output electric field difference △E is calculated, and the preliminary comparative evaluation based on the electric field difference is carried out, and according to the preliminary comparative evaluation result, the compensation mechanism is triggered;

[0009] S3, in the compensation mechanism, the potential collection point and the optical collection point in the collection point are started, and the potential and optical data are collected in real time, the collected potential and optical data are transmitted to the control system, and the orientation difference △Hf is calculated in the control system;

[0010] S4, in the control system, based on the electric field difference △E and the orientation difference △Hf, the fiber structure forming index X is established, and the fiber structure forming index X is compared with the forming threshold Xth, and the adaptive adjustment mechanism is executed based on the comparison result.

[0011] Preferably, the S1 comprises S11;

[0012] S11, the collection point comprises a current collection point, a conductivity collection point, a potential collection point and an optical collection point; the current collection point and the conductivity collection point are initially started, and the conductive raw data is collected in real time based on the relevant sensors arranged in the current collection point and the conductivity collection point; and the conductive raw data is transmitted to the control system through the data interaction module through a wireless communication protocol;

[0013] The relevant sensors comprise a first current sensor, a second current sensor and a micro electrode probe array;

[0014] The conductive raw data comprises a central area current density Jc, an edge area current density Je and a melt conductivity Rmelt.

[0015] Preferably, the S1 further comprises S12;

[0016] S12, the data interaction module comprises a bidirectional communication unit arranged between the fiber forming equipment and the control system, the bidirectional communication unit adopts a wireless communication protocol, encapsulates and packages the conductive raw data obtained by the current collection point and the conductivity collection point, encodes the data packet, and transmits the data packet to the control system;

[0017] The control system extracts the conductive raw data from the received data packet, and sequentially executes preprocessing on the conductive raw data to obtain a standard conductive data set, and the preprocessing comprises data integrity detection and noise filtering;

[0018] The data integrity detection eliminates packet loss and abnormal delay data by packet checksum and timestamp comparison of the received center zone current density Jc, edge zone current density Je and melt conductivity Rmelt.

[0019] The noise filtering eliminates high-frequency noise interference by using a median filtering method on the center zone current density Jc and the edge zone current density Je.

[0020] Preferably, the S2 comprises S21.

[0021] S21, based on the pre-processed standard conductive data set, uses the modified formula of Ohm's law to calculate the output electric field difference △E, and in the calculation process, the control system performs multi-step verification, which verifies the time sequence consistency of the input standard conductive data set, and the center zone current density Jc and the edge zone current density Je correspond to the same batch of melt conductivity Rmelt.

[0022] Preferably, the S2 comprises S22.

[0023] S22, after the control system obtains the electric field difference △E, it performs preliminary comparative evaluation, which compares the electric field difference △E with the preset electric field threshold Eth, and triggers the compensation mechanism based on the preliminary comparative evaluation result. The specific evaluation content is as follows:

[0024] When the electric field difference △E is greater than or equal to the electric field threshold Eth, the control system determines that the formation condition of the fiber core-shell structure has been met and outputs the execution instruction to enter the direct forming step;

[0025] When the electric field difference △E is less than the electric field threshold Eth, the control system determines that the fiber forming condition is insufficient and automatically triggers the compensation mechanism.

[0026] Preferably, the S3 comprises S31.

[0027] S31, after triggering the compensation mechanism, start the electric potential collection point and the optical collection point, and set a micro electric potential probe array and a polarization interference sensor in the electric potential collection point and the optical collection point, real-time collect the electric potential and optical raw data, and transmit the collected electric potential and optical raw data to the control system through the data interaction module, and then perform dimensionless processing to eliminate the dimensional influence between all parameters in the electric potential and optical raw data, and obtain the electric potential and optical data.

[0028] The electric potential and optical data include local electric potential adjustment amount △Jb, core birefringence △n core and shell birefringence △n shell.

[0029] Preferably, the S3 further comprises S32.

[0030] S32, based on the obtained potential and optical data, the core birefringence Δn core and the shell birefringence Δn shell are compared with the pre-stored full orientation reference birefringence Δn ref, and the local potential adjustment amount ΔJb transmitted by the local potential collection point is combined to calculate and obtain the orientation difference ΔHf, which measures the difference between the molecular chain orientations of the core and the shell.

[0031] Preferably, the S4 comprises S41;

[0032] S41, the electric field difference ΔE is dimensionless, the dimension of the electric field difference ΔE is eliminated, and the orientation difference ΔHf is comprehensively calculated to output the fiber structure forming index X, and the composite effect of the electric field driving force and the molecular chain orientation difference is quantitatively analyzed.

[0033] Preferably, the S4 further comprises S41;

[0034] S41, after obtaining the fiber structure forming index X, the fiber structure forming index X is compared with the preset forming threshold Xth, and an adaptive adjustment mechanism is executed based on the comparison result; the specific comparison content is as follows:

[0035] When the fiber structure forming index X is greater than or equal to the forming threshold Xth, it is determined that the fiber forming process condition is met, and an execution instruction for entering batch production is output;

[0036] When the fiber structure forming index X is less than the forming threshold Xth, the control system triggers the adaptive adjustment mechanism;

[0037] The adaptive adjustment mechanism reduces the edge zone current density Je by 2% through the control system, detects the iterative fiber structure forming index X after the reduction, if it is still insufficient, increases the center zone current density Jc by 1%, detects the iterative fiber structure forming index X again, if it is still insufficient, increases the local potential adjustment amount ΔJb by 0.1V; if it is still insufficient, the iteration is continued from reducing the edge zone current density Je by 2%, and the iteration is ended until the fiber forming process condition is determined to be met.

[0038] The fiber forming system based on the composite conductive fiber spinneret comprises an inductance collection module, an electric field analysis module, an orientation difference analysis module and a forming analysis module.

[0039] The inductance collection module is arranged around the composite conductive fiber spinneret, and related sensors are arranged in the collection points, which are used to collect the conductive raw data of the center zone in real time; the collected conductive raw data is transmitted to the control system through the data interface, and the conductive raw data is preprocessed in the control system to obtain the standard conductive data set.

[0040] The electric field analysis module calculates the output electric field difference DE based on a standard conductive data set, and performs a preliminary comparison and evaluation based on the electric field difference, and triggers a compensation mechanism according to the preliminary comparison and evaluation result;

[0041] The orientation difference analysis module collects the electric potential and optical data in real time by starting the electric potential collection point and the optical collection point in the compensation mechanism, transmits the collected electric potential and optical data to the control system, and calculates the orientation difference DHf in the control system;

[0042] The forming analysis module establishes a fiber structure forming index X based on the electric field difference DE and the orientation difference DHf in the control system, compares the fiber structure forming index X with a forming threshold Xth, and executes an adaptive adjustment mechanism based on the comparison result.

[0043] The present application provides a fiber forming method and system based on a composite conductive fiber spinneret.

[0044] (1) The method sets current collection points in the center and edge regions of the composite conductive fiber spinneret, and configures conductivity collection points near the spinneret outlet, collects conductive raw data in real time, and transmits the collected conductive raw data to the control system through the data interaction module, After the preprocessing steps such as data integrity detection and noise filtering in the control system, a standard conductive data set is formed. Based on the standard conductive data set, the Ohm's law is used to rewrite the formula to calculate the output electric field difference DE, which can realize the accurate calculation of the electric field difference DE. Compared with the traditional uniform current distribution method, this method ensures the reliability of the data and the accuracy of the electric field difference calculation through multi-point collection and data preprocessing, thereby effectively improving the stability and refinement of the electric field control in the fiber forming process.

[0045] (2) After the electric field difference DE is calculated, the control system compares it with the preset electric field threshold Eth, and if the electric field difference DE is not sufficient to support the stable formation of the fiber core-shell structure, the compensation mechanism is automatically triggered, and the electric potential collection point and the optical collection point at the spinneret outlet are started. The micro-potential probe array configured in the electric potential collection point can monitor the local potential adjustment amount Jb in real time, and the polarization interference sensor configured in the optical collection point can obtain the core birefringence ncore and the shell birefringence nshell in real time. By transmitting the collected data to the control system and performing dimensionless processing, and comparing with the full-orientation reference birefringence nref, combined with the local potential adjustment amount Jb, the orientation difference DHf is calculated. This step can realize the reinforcement compensation of molecular chain orientation through potential adjustment and optical feedback in the case of insufficient electric field difference, improve the problem that the orientation difference between the fiber core and shell is not obvious, and make the fiber forming process have self-correcting ability.

[0046] (3) The method obtains the fiber structure forming index X by dimensionless comprehensive calculation of the electric field difference DE and the orientation difference DHf through the control system after obtaining the electric field difference DE and the orientation difference DHf, and compares the fiber structure forming index X with the forming threshold Xth. If the fiber structure forming index X is greater than or equal to the forming threshold Xth, the method directly enters batch production; if the fiber structure forming index X is less than the forming threshold Xth, the method triggers an adaptive adjustment mechanism. The adaptive adjustment mechanism automatically reduces the edge zone current density Je by 2% through the control system, and if it is still insufficient, the center zone current density Jc is increased by 1%, and if it is still insufficient, the local potential adjustment amount AJb is increased by 0.1 V, and closed-loop optimization is achieved in multiple rounds of iteration. The mechanism can dynamically correct the current distribution and local potential to ensure that the fiber structure forming index X stably reaches the threshold Xth, thereby significantly improving the consistency and yield of batch fiber forming. Compared with the existing method which only relies on single current control, the present method realizes the adaptability and high repeatability of the process through the composite control logic of "electric field difference + orientation difference + index threshold comparison". BRIEF DESCRIPTION OF DRAWINGS

[0047] Figure 1 The figure is a schematic diagram of the fiber forming method based on the composite conductive fiber spinneret of the present application.

[0048] Figure 2 The figure is a schematic diagram of the fiber forming system flow based on the composite conductive fiber spinneret of the present application.

[0049] Figure 3 The figure is a schematic diagram of the point layout structure. DETAILED DESCRIPTION

[0050] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0051] Embodiment 1

[0052] Please refer to Figure 1 and Figure 3 The present application provides a fiber forming method based on a composite conductive fiber spinneret. To achieve the above purpose, the present application is implemented by the following technical solutions: comprising the following steps:

[0053] S1, a plurality of collection points are arranged around the composite conductive fiber spinneret, and relevant sensors are arranged in the collection points for real-time collection of conductive raw data of the center zone; the collected conductive raw data is transmitted to the control system through a data interface, and the conductive raw data is preprocessed in the control system to obtain a standard conductive data set;

[0054] S2, based on the standard conductive data set, calculating the output electric field difference DE, and performing a preliminary comparative evaluation based on the electric field difference, triggering a compensation mechanism according to the preliminary comparative evaluation result;

[0055] S3, in the compensation mechanism, starting the potential acquisition point and the optical acquisition point in the acquisition point, collecting the potential and optical data in real time, transmitting the collected potential and optical data to the control system, and calculating the orientation difference DHf in the control system;

[0056] S4, in the control system, based on the electric field difference DE and the orientation difference DHf, establishing a fiber structure forming index X, and comparing the fiber structure forming index X with a forming threshold Xth, and executing an adaptive adjustment mechanism based on the comparison result.

[0057] In this embodiment, the method ensures the real-time collection and cleaning of the center zone current density Jc, the edge zone current density Je and the melt electrical conductivity Rmelt through the collection point layout of S1 and the original data preprocessing. The reason for this setting is that if there is noise or delay in the collected signal, it will directly lead to distortion of the electric field difference calculation and cause judgment errors, ultimately resulting in uneven structure of the fiber forming. Through data integrity detection and filter preprocessing, the data can be ensured to be real and effective at the source, and a stable foundation is established for subsequent calculation; in the calculation and preliminary evaluation of S2 electric field difference △E, the difference is solved by using the Ohm's law formula, and the physical meaning is to quantify the difference of electric field driving force between the center zone and the edge zone. If there is no such comparison, the fiber core-shell structure will be blurred due to insufficient electric field difference, resulting in functional performance failure. The purpose of setting the electric field threshold Eth is to establish a clear "passing line" for the process, ensuring that only under the condition of reaching the minimum electric field difference is allowed to enter the forming; in the potential and optical feedback under the compensation mechanism of S3, the increase of potential collection points and optical collection points is to cope with the situation of insufficient △E. Because in the actual melt injection, local disturbance or temperature fluctuation will cause electric field adjustment failure, at this time, if the core birefringence Δncore, shell birefringence Δnshell and local potential adjustment amount ΔJb are not introduced, the molecular chain orientation will lack driving force, and the fiber will have insufficient orientation difference. Through this compensation step, the orientation difference △Hf can be strengthened at the micro-molecular level, so that the internal structure of the fiber is clear and controllable; finally, in the comparison and adaptive adjustment of the fiber structure forming index X of S4, the combination of electric field difference △E and orientation difference △Hf is to unify the electric field action and molecular chain response, otherwise it is difficult to reflect the real forming state of the fiber only by single electric field difference. Comparing the fiber structure forming index X with the forming threshold Xth can dynamically judge whether the process requirements are met, and through the gradual adjustment of Je, Jc and ΔJb, the closed-loop optimization is realized. This way avoids the problems of "overcompensation" or "insufficient adjustment", so that the forming conditions are always in the best window, and finally the core-shell clarity, conductive gradient controllability and batch production consistency of the fiber are improved.

[0058] Embodiment 2

[0059] See Figure 1 and Figure 3 , in particular: S1 includes S11;

[0060] S11, the collection points include current collection points, electrical conductivity collection points, potential collection points and optical collection points; the current collection points and the electrical conductivity collection points are initially started, and based on the related sensors arranged in the current collection points and the electrical conductivity collection points, the conductive original data is collected in real time; and through the data interaction module, the conductive original data is transmitted to the control system through a wireless communication protocol;

[0061] The related sensors include a first current sensor, a second current sensor, and a micro-electrode probe array;

[0062] The conductive raw data includes a center zone current density Jc, an edge zone current density Je, and a melt electrical conductivity Rmelt;

[0063] The current collection points collect the center zone current density Jc and the edge zone current density Je in real time and keep synchronous updating through the first current sensor arranged in the center zone conductive layer inside the composite conductive fiber spinneret and the second current sensor arranged in the edge zone conductive layer inside the composite conductive fiber spinneret.

[0064] The electrical conductivity collection point is configured near the spinneret outlet and is provided with a micro-electrode probe array, the micro-electrode probe array is in contact with the melt to measure the melt electrical conductivity Rmelt, and the signals collected from multiple points are transmitted to the control system through the data interaction module.

[0065] S1 further includes S12;

[0066] S12, the data interaction module includes a bidirectional communication unit arranged between the fiber forming equipment and the control system, the bidirectional communication unit adopts a wireless communication protocol, encapsulates, packages and encodes the conductive raw data obtained by the current collection point and the electrical conductivity collection point, obtains a data packet, and transmits the data packet to the control system;

[0067] The control system extracts the conductive raw data by unpacking the received data packet, and sequentially performs preprocessing on the conductive raw data to obtain a standard conductive data set, the preprocessing includes data integrity detection and noise filtering;

[0068] The data integrity detection performs data packet verification and timestamp comparison on the received center zone current density Jc, edge zone current density Je and melt electrical conductivity Rmelt, and eliminates packet loss and abnormal delay data;

[0069] The noise filtering eliminates high-frequency noise interference by using a median filtering method on the center zone current density Jc and the edge zone current density Je, so as to ensure the stability of the collected center zone current density Jc and the edge zone current density Je.

[0070] In this embodiment, the method realizes the synchronous collection of the current density Jc of the center area and the current density Je of the edge area by embedding the first current sensor and the second current sensor in the center area and the edge area of the composite conductive fiber spinneret respectively in the layout of the S11 current collection point. The reason for such arrangement is that if the current collection at the two places is not synchronized, data deviation will occur, leading to the distortion of the electric field difference calculation and ultimately causing the misjudgment of the fiber core-shell structure. Through real-time synchronous updating, the spatial consistency and temporal consistency of the data are ensured, and the true reflection of the electric field distribution gradient is guaranteed in the physical sense. In the configuration of the S11 conductivity collection point, the micro electrode probe array is arranged near the spinneret outlet to directly contact the melt for measuring the melt conductivity Rmelt. The reason for selecting the spinneret position is that if the collection is carried out at a position far from the spinneret, the melt temperature and the shear rate will be out of synchronization, which will cause the conductivity measurement deviation and ultimately affect the judgment of the electric field strength. Through the arrangement close to the spinneret, the real conductivity value at the instant of fiber formation can be obtained, and the physical meaning is that the material electrical parameters are highly consistent with the actual spinning process, thereby enhancing the calculation accuracy. In the S12 data interaction and preprocessing, the conductive raw data is wirelessly transmitted to the control system by using the bidirectional communication unit, and data integrity detection and median filter preprocessing are carried out. The purpose of this design is to avoid false judgment caused by packet loss or high-frequency noise interference. If this processing link is missing, even if the front-end sensor collection is accurate, the reliability will be lost due to signal distortion. By excluding abnormal data through data packet verification and suppressing transient interference through filtering, it can be ensured that all the effective data are input into the control system. The physical meaning is that the inevitable fluctuations under real working conditions are converted into stable and reliable calculation basis, and finally the output result of the electric field difference ΔE is stable and reliable.

[0071] Embodiment 3

[0072] Please refer to Figure 1 , specifically: S2 includes S21;

[0073] S21, based on the preprocessed standard conductive data set, the rewritten formula of Ohm's law is used for calculation output electric field difference ΔE, and in the calculation process, the control system performs multi-step verification. The standard conductive data set is verified for time sequence consistency, and the center area current density Jc and the edge area current density Je correspond to the same batch of melt conductivity Rmelt.

[0074] The specific calculation formula of the electric field difference ΔE is: ΔE = (Jc-Je) / Rmelt.

[0075] The relationship between the electric field intensity and the current density is derived from Ohm's law. In the fiber forming process of the composite conductive fiber spinneret, the current density Jc in the center region and the current density Je in the edge region are different, which will cause the difference in the electric field distribution. The formula for calculating the electric field difference △E is constructed on the basis of Ohm's law. According to Ohm's law, the difference between the electric field intensity Ec in the center region and the electric field intensity Ee in the edge region is combined and improved; the greater the △E, the more obvious the difference in the electric field between the center and the edge of the spinneret, thereby enhancing the difference in the orientation of the molecular chain in the radial direction; if the △E is too small, the fiber core-shell structure is difficult to form.

[0076] The dimensional consistency analysis is as follows: the units of Jc and Je are A / cm. 2 The unit of Rmelt is A / (V·cm); after substitution: A / cm 2 A / (V·cm)=V / cm, which is reasonable in dimension.

[0077] S2 includes S22;

[0078] S22, after the control system obtains the electric field difference △E, a preliminary comparison and evaluation is performed. The preliminary comparison and evaluation is performed by preliminarily comparing and evaluating the electric field difference △E with a preset electric field threshold Eth, and triggering a compensation mechanism based on the preliminary comparison and evaluation result. The specific evaluation content is as follows:

[0079] When the electric field difference △E≥the electric field threshold Eth, the control system determines that the formation condition of the fiber core-shell structure has been met and outputs an execution instruction for entering the direct forming step;

[0080] When the electric field difference △E<the electric field threshold Eth, the control system determines that the fiber forming condition is insufficient and automatically triggers the compensation mechanism.

[0081] The electric field threshold Eth is set by combining experimental calibration and process simulation, that is, in multiple batches of fiber forming experiments, by adjusting the center region current density Jc and the edge region current density Je and recording the molecular chain orientation and the core-shell structure clarity of the corresponding fiber, the minimum electric field difference required to ensure stable fiber structure forming is counted, and the minimum electric field difference is defined as the electric field threshold Eth.

[0082] In this embodiment, the method avoids the problem of "cross-batch data mismatch" by checking the time sequence consistency of the center zone current density Jc and the edge zone current density Je corresponding to the melt conductivity Rmelt of the same batch in the calculation of the electric field difference DE. If Jc, Je and Rmelt are not collected in the same time period, it will lead to the virtuality of the calculated electric field difference DE, and finally affect the forming judgment. The purpose of such implementation is to ensure the timeliness and pairing of input data, and the physical meaning is to ensure that the difference DE of the electric field distribution truly reflects the actual working condition, thereby improving the judgment accuracy of the core-shell structure forming condition. In the application of the Ohm's law rewriting formula, the current density and the melt conductivity are combined to derive the electric field difference DE, which aims to convert the complex electric field distribution problem into a directly calculable parameter form. If it directly depends on the traditional electric field measurement, not only is the equipment expensive, but also it cannot provide real-time feedback; through this formula, the difference between the center and edge electric field intensity of the spinneret can be quickly obtained, and the physical meaning is to provide an index for the quantitative driving force of the molecular chain radial orientation, thereby improving the prediction accuracy of the forming trend. In the comparison of the electric field difference and the electric field threshold Eth, a clear electric field threshold Eth is set instead of relying on fuzzy experience judgment, in order to avoid the situation that the electric field difference is insufficient but mistakenly considered as qualified in the actual process. For example, if DE is too small but compensation is not triggered, it will lead to the collapse of the shell layer or the blurring of the core-shell interface, affecting the product quality. By directly comparing DE and Eth, the compensation mechanism can be triggered early in the process to avoid waste due to insufficient conditions. The physical meaning is to control the forming stability through quantitative criteria to improve the clarity of the core-shell structure of the fiber and the batch consistency.

[0083] Embodiment 4

[0084] Please refer to Figure 1 Figure 3 Specifically, S3 includes S31;

[0085] S31, after triggering the compensation mechanism, starting the potential acquisition point and the optical acquisition point, and setting a micro potential probe array and a polarization interference sensor in the potential acquisition point and the optical acquisition point, real-time acquisition of potential and optical raw data, and transmission of the acquired potential and optical raw data to the control system by the data interaction module, and then performing dimensionless processing to eliminate the dimensional influence between all parameters in the potential and optical raw data, obtaining potential and optical data;

[0086] The potential and optical data include local potential adjustment amount AJb, core birefringence Ancore and shell birefringence Anshell.

[0087] The potential acquisition point is set at the spinneret outlet and uses a micro potential probe array to monitor the local potential adjustment amount AJb in real time.

[0088] The optical collection point detects the birefringence of the core layer and the birefringence of the shell layer before the fiber is formed in real time by being arranged at the outlet of the spinneret and using a polarization interference sensor.

[0089] S3 also includes S32;

[0090] S32, based on the acquired potential and optical data, compares the birefringence of the core layer and the birefringence of the shell layer with the pre-stored full orientation reference birefringence, and combines the local potential adjustment amount ΔJb transmitted by the local potential collection point to calculate and acquire the orientation difference ΔHf, which measures the difference in molecular chain orientation between the core layer and the shell layer;

[0091] The specific calculation formula of the orientation difference ΔHf is: In the formula, Δnref represents the full orientation reference birefringence, and k represents the coupling coefficient, which is dimensionless and ranges from 0 to 1.

[0092] The source of the formula: The formula is derived from the birefringence principle and the electric field and optical coupling principle. The birefringence principle: In optical physics, the orientation of the molecular chain of the material will cause optical anisotropy, thereby forming the phenomenon of birefringence. The electric field and optical coupling principle: According to polymer physics, an external electric field has a driving effect on the orientation of the molecular chain of the melt; the potential control parameter Δφ changes the arrangement state of the molecular chain, thereby affecting the birefringence difference.

[0093] Derivation logic of the formula: The difference between the birefringence of the core layer and the birefringence of the shell layer defines the birefringence difference between the core layer and the shell layer, which represents the optical difference in the orientation of the core-shell layer molecular chain.

[0094] Introducing the full orientation reference birefringence Δnref normalizes the birefringence difference, eliminating the influence of the intrinsic refractive index difference of different batches of melt materials; considering the electric field compensation effect: when the electric field difference ΔE is insufficient, the local potential adjustment amount ΔJb is used for correction, and the coupling term k·ΔJb is established to finally obtain the orientation difference formula.

[0095] Dimension consistency analysis: The potential and optical data are both dimensionless data, and k is also dimensionless, so the output orientation difference ΔHf is dimensionless data.

[0096] In the design of S31 in this embodiment, the reason for simultaneously arranging the micro-potential probe array and the polarization interference sensor at the outlet of the spinneret is that this position is closest to the initial forming area of the fiber, and can capture the changes in the local potential distribution and the molecular chain orientation in real time. If the sensor is arranged too far away, it will cause signal delay or distortion, making the control feedback lag, and thus missing the compensation window. The purpose of this implementation is to "front-load" the electric field regulation and the detection of the molecular chain response. The physical meaning is to directly monitor the flow field and the optical characteristics at the source of the forming, and to ensure that the data obtained through subsequent calculations are highly consistent with the actual working conditions. In the calculation of the orientation difference AHf in S32, the difference between the birefringence of the core layer and the birefringence of the shell layer is introduced into the full-orientation reference birefringence nref, which is to eliminate the differences in intrinsic refractive index between different batches of materials. If no normalization processing is performed, different batches of materials will produce reference shifts due to differences in molecular weight distribution, resulting in misjudgment of AHf. Real-time comparison of ncore, nshell and nref, combined with the compensation of the local potential regulation amount AJb, can ensure that the orientation difference calculation is closer to the molecular chain orientation state under the actual electric field driving, and the physical meaning is to accurately reveal the coupling relationship between "electric field-molecular chain orientation-optical response". The beneficial effects of this design are: avoiding the distortion of the orientation difference caused by signal delay and differences between batches of materials, and realizing the rapid and accurate quantification of the orientation difference of the core-shell molecular chains. Finally, the sensitivity and reliability of the electric field compensation mechanism are improved, so that the fiber can still maintain a clear core-shell structure and stable mechanical properties under compensation conditions.

[0097] Embodiment 5

[0098] See Figure 1 , specifically: S4 includes S41;

[0099] S41, the electric field difference AE is dimensionless, the dimension of the electric field difference AE is eliminated, and the orientation difference AHf is calculated comprehensively, and the fiber structure forming index X is output, the composite effect of the electric field driving force and the molecular chain orientation difference is quantitatively analyzed, and the fiber structure forming index X is calculated as X = AE AHf; The physical meaning of the formula is used to quantitatively represent the composite effect of "electric field driving force x molecular chain response".

[0100] S4 also includes S41;

[0101] S41, after obtaining the fiber structure forming index X, compare it with the preset forming threshold Xth, and execute the adaptive adjustment mechanism based on the comparison result; The specific comparison content is as follows:

[0102] When the fiber structure forming index X is greater than or equal to the forming threshold Xth, it is determined that the fiber forming process condition is met, and the execution instruction of entering batch production is output;

[0103] When the fiber structure forming index X is less than the forming threshold Xth, the control system triggers an adaptive adjustment mechanism;

[0104] The adaptive adjustment mechanism reduces the edge zone current density Je by 2% through the control system, detects the iterative fiber structure forming index X after the reduction, if it is still insufficient, increases the center zone current density Jc by 1%, detects the iterative fiber structure forming index X again, if it is still insufficient, increases the local potential adjustment amount △Jb by 0.1V, if it is still insufficient, continues to iterate from reducing the edge zone current density Je by 2%, and ends the iteration until it is determined that the fiber forming process conditions meet.

[0105] In the embodiment of the method, the electric field difference △E is dimensionless in the embodiment of S41, and is combined with the orientation difference △Hf, and the core purpose is to avoid the direct multiplication of different dimensional physical quantities to cause the distortion of the calculation result. For example, if the △E with unit and the △Hf are directly used, the result obtained will be disturbed by the test scale or the equipment precision, and the real coupling effect during the fiber forming cannot be accurately reflected. Through dimensionless, it is ensured that the fiber structure forming index X calculated only represents the comprehensive effect of the "electric field driving force and the molecular chain orientation difference", and is not affected by the difference of physical units, the physical meaning is clear and convenient for cross-experiment comparison. In the setting of the adaptive adjustment mechanism, the edge zone current density Je is first reduced by 2%, because the edge current often has a greater impact on the uniformity of the electric field distribution, if it is not adjusted first, it is easy to cause the electric field to form an abnormal concentration area at the edge of the spinneret, and then the fiber diameter is uneven. If a single adjustment is insufficient, the center zone current density Jc is increased by 1%, and this order design is to gradually increase the driving force in the center zone, so as to avoid the local overstretching of the fiber caused by a large amount of adjustment at one time. Finally, the fine adjustment of the local potential adjustment amount △Jb (0.1V) is introduced, which plays a fine tuning role and solves the detail deviation caused by the response lag of the molecular chain. The beneficial effect of this embodiment is that the secondary fluctuation problem caused by direct excessive adjustment is avoided, and the coordinated closed-loop optimization of the current and the potential is realized. Through the hierarchical and component adjustment strategy, it is ensured that the fiber structure forming index X can stably approach or exceed the forming threshold Xth, so as to improve the consistency of the fiber core-shell structure and the controllability of batch production.

[0106] Embodiment 6

[0107] Please refer to Figure 1 and Figure 2 , the fiber forming system based on the composite conductive fiber spinneret includes an inductance acquisition module, an electric field analysis module, an orientation difference analysis module, and a forming analysis module;

[0108] The inductance collection module sets a plurality of collection points around the composite conductive fiber spinneret, and sets relevant sensors in the collection points, for real-time collection of conductive raw data of the central area; the collected conductive raw data is transmitted to the control system through a data interface, and the conductive raw data is preprocessed in the control system to obtain a standard conductive data set;

[0109] The electric field analysis module calculates and outputs an electric field difference DE based on the standard conductive data set, and performs preliminary comparative evaluation based on the electric field difference, and triggers a compensation mechanism according to the preliminary comparative evaluation result;

[0110] The orientation difference analysis module starts the electric potential collection point and the optical collection point in the compensation mechanism, and collects electric potential and optical data in real time, and transmits the collected electric potential and optical data to the control system, and calculates an orientation difference DHf in the control system;

[0111] The forming analysis module establishes a fiber structure forming index X based on the electric field difference DE and the orientation difference DHf in the control system, and compares the fiber structure forming index X with a forming threshold Xth, and executes an adaptive adjustment mechanism based on the comparison result.

[0112] Although embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application.

Claims

1. A fiber forming method based on a composite conductive fiber spinneret, characterized by: Comprise the following steps: S1, several collection points are arranged around the composite conductive fiber spinneret, and relevant sensors are arranged in the collection points for real-time collection of conductive raw data of the central area; the collected conductive raw data is transmitted to the control system through a data interface, and the conductive raw data is preprocessed in the control system to obtain a standard conductive data set; S2, based on the standard conductive data set, the output electric field difference △E is calculated, and the preliminary comparison and evaluation based on the electric field difference is carried out, and according to the preliminary comparison and evaluation result, the compensation mechanism is triggered; S3, in the compensation mechanism, the electric potential collection point and the optical collection point in the collection point are started, and the electric potential and optical data are collected in real time, and the collected electric potential and optical data are transmitted to the control system, and the orientation difference △Hf is calculated in the control system; S3 comprises S31; S31, after triggering the compensation mechanism, the electric potential collection point and the optical collection point are started, and a micro electric potential probe array and a polarization interference sensor are arranged in the electric potential collection point and the optical collection point, the electric potential and optical raw data are collected in real time, and the collected electric potential and optical raw data are transmitted to the control system by the data interaction module, and then the dimensionless processing is carried out, the dimension influence between all parameters in the electric potential and optical raw data is eliminated, and the electric potential and optical data are obtained; The electric potential and optical data include local electric potential adjustment amount △Jb, core birefringence △ncore and shell birefringence △nshell; S3 also comprises S32; S32, based on the obtained electric potential and optical data, the core birefringence △ncore and the shell birefringence △nshell are compared with the pre-stored full orientation reference birefringence △nref, and the local electric potential adjustment amount △Jb transmitted by the local electric potential collection point is combined to calculate and obtain the orientation difference △Hf, which measures the difference of the molecular chain orientation of the core and the shell; S4, in the control system, based on the electric field difference △E and the orientation difference △Hf, the fiber structure forming index X is established, and the fiber structure forming index X is compared with the forming threshold Xth, and the adaptive adjustment mechanism is executed based on the comparison result; S4 comprises S41; S41, the electric field difference △E is dimensionless processed to eliminate the dimension of the electric field difference △E, and is comprehensively calculated with the orientation difference △Hf to output the fiber structure forming index X, and the composite effect of the electric field driving force and the molecular chain orientation difference is quantitatively analyzed; S4 also comprises S42; S42, after obtaining the fiber structure forming index X, the fiber structure forming index X is compared with the preset forming threshold Xth, and the adaptive adjustment mechanism is executed based on the comparison result; the specific comparison content is as follows: When the fiber structure forming index X is greater than or equal to the forming threshold Xth, it is determined that the fiber forming process condition is satisfied, and the execution instruction of entering batch production is output; When the fiber structure forming index X is less than the forming threshold Xth, the control system triggers the adaptive adjustment mechanism; The adaptive adjustment mechanism reduces the edge zone current density Je by 2% through the control system, detects the iterative fiber structure forming index X after the reduction, and if it is still insufficient, increases the center zone current density Jc by 1%, detects the iterative fiber structure forming index X again, and if it is still insufficient, increases the local potential adjustment amount △Jb by 0.1V; if it is still insufficient, continue to iterate from reducing the edge zone current density Je by 2% until the fiber forming process conditions are determined to meet and the iteration is ended.

2. The composite conductive fiber spinneret-based fiber forming method according to claim 1, characterized by: The S1 includes S11; S11, the collection point includes a current collection point, a conductivity collection point, a potential collection point and an optical collection point; the current collection point and the conductivity collection point are initially started, and based on the related sensors arranged in the current collection point and the conductivity collection point, the conductive raw data is collected in real time; and through the data interaction module, the conductive raw data is transmitted to the control system through a wireless communication protocol; The related sensors include a first current sensor, a second current sensor and a micro electrode probe array; The conductive raw data includes a center zone current density Jc, an edge zone current density Je and a melt conductivity Rmelt.

3. The fiber forming method based on the composite conductive fiber spinneret according to claim 2, characterized by: The S1 also includes S12; S12, the data interaction module includes a bidirectional communication unit arranged between the fiber forming equipment and the control system, the bidirectional communication unit adopts a wireless communication protocol, encapsulates and packages the conductive raw data obtained by the current collection point and the conductivity collection point, encodes the data packet, and transmits the data packet to the control system; The control system extracts the conductive raw data by unpacking the received data packet, and sequentially executes preprocessing on the conductive raw data to obtain a standard conductive data set, the preprocessing including data integrity detection and noise filtering; The data integrity detection performs packet verification and timestamp comparison on the received center zone current density Jc, edge zone current density Je and melt conductivity Rmelt to eliminate packet loss and abnormal delay data; The noise filtering eliminates high-frequency noise interference by using a median filtering method on the center zone current density Jc and the edge zone current density Je.

4. The fiber forming method based on the composite conductive fiber spinneret according to claim 3, characterized by: The S2 includes S21; S21, based on the preprocessed standard conductive data set, the output electric field difference △E is calculated, and in the calculation process, the control system performs multi-step verification, which verifies the time sequence consistency of the input standard conductive data set, and the center zone current density Jc and the edge zone current density Je correspond to the same batch of melt conductivity Rmelt. The specific calculation formula of the electric field difference △E is: △E= (Jc-Je) / Rmelt; wherein the units of the center zone current density Jc and the edge zone current density Je are A / cm 2 ; the units of the melt conductivity Rmelt are A / (V cm); after substitution: A / cm 2 A / (V cm) = V / cm.

5. The composite conductive fiber spinneret-based fiber forming method according to claim 4, characterized by: The S2 includes S22; S22, after the control system obtains the electric field difference △E, a preliminary comparison evaluation is performed, which compares the electric field difference △E with the preset electric field threshold Eth, and triggers the compensation mechanism based on the preliminary comparison evaluation result, and the specific evaluation content is as follows: When the electric field difference △E is greater than or equal to the electric field threshold Eth, the control system determines that the formation condition of the fiber core-shell structure has been met and outputs an execution instruction to enter the direct forming step. When the electric field difference △E is less than the electric field threshold Eth, the control system determines that the fiber forming condition is insufficient and automatically triggers the compensation mechanism.

6. A fiber forming system based on a composite conductive fiber spinneret, applied to the fiber forming method based on a composite conductive fiber spinneret according to any one of claims 1 to 5, characterized in that: The system comprises an inductance acquisition module, an electric field analysis module, an orientation difference analysis module and a forming analysis module. The inductance acquisition module is arranged with a plurality of acquisition points around the composite conductive fiber spinneret, and relevant sensors are arranged in the acquisition points to acquire the conductive raw data of the central area in real time; the acquired conductive raw data is transmitted to the control system through a data interface, and the conductive raw data is preprocessed in the control system to obtain a standard conductive data set; The electric field analysis module calculates and outputs the electric field difference △E based on the standard conductive data set, and preliminarily compares and evaluates based on the electric field difference; according to the preliminary comparison and evaluation result, the compensation mechanism is triggered; The orientation difference analysis module starts the electric potential acquisition point and the optical acquisition point in the acquisition point in the compensation mechanism, acquires the electric potential and optical data in real time, transmits the acquired electric potential and optical data to the control system, and calculates the orientation difference △Hf in the control system; The forming analysis module establishes the fiber structure forming index X based on the electric field difference △E and the orientation difference △Hf in the control system, compares the fiber structure forming index X with the forming threshold Xth, and executes the adaptive adjustment mechanism based on the comparison result.

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