A basalt fiber drawing control method, system, equipment and medium

Abstract

The present invention discloses a basalt fiber drawing control method, system, equipment and medium, which relates to the technical field of control systems, including: setting a preset time period, obtaining the current moment and historical moments, obtaining a historical drawing diameter data sequence, and obtaining a stability index; if the stability index exceeds a preset threshold, obtaining a historical melt viscosity data sequence, obtaining the viscosity change direction, and obtaining the drawing diameter change direction; if the diameter change direction is decreasing, obtaining a minimum viscosity value, forming a first pretreatment reference viscosity value, obtaining a melt viscosity value to be monitored, and if the melt viscosity value to be monitored is less than the first pretreatment reference viscosity value, reducing the temperature of the leak plate; if the diameter change direction is increasing, obtaining a maximum viscosity value, forming a second pretreatment reference viscosity value, obtaining a melt viscosity value to be monitored, and if the melt viscosity value to be monitored is greater than the second pretreatment reference viscosity value, increasing the temperature of the leak plate. The present invention has the advantages of improving drawing quality, optimizing energy efficiency and precise control.

Description

Technical Field

[0001] The present invention relates to the technical field of control systems, and in particular to a basalt fiber drawing control method, system, equipment and medium. Background Art

[0002] In the continuous drawing production process of basalt fiber, dynamic fluctuations in melt viscosity and failure to control drawing diameter are the core technical bottlenecks in this field.

[0003] Specifically, due to differences in mineral composition and high-temperature reactivity, basalt melt has an extremely short window (typically only a few minutes) for its initial viscosity to reach the critical viscosity for wire breakage. Existing methods, based on feedback control based on current instantaneous viscosity or hysteresis diameter detection, overlap the viscosity monitoring period (minimum observable period) with the process response time (the delay from temperature adjustment to viscosity stabilization). This results in the melt exceeding the allowable limit viscosity by the time control commands are issued, frequently leading to wire breakage or diameter deviations. Furthermore, fluctuations in melt viscosity are amplified by the drawing process, resulting in relatively large diameter deviations. However, existing methods only passively adjust the temperature when the diameter actually exceeds the limit, failing to proactively intervene in impending diameter instability. More importantly, existing methods find it difficult to balance control sensitivity and stability. Tightening the temperature adjustment threshold and performing continuous temperature fine-tuning will not only increase energy waste, but also induce oscillatory quality fluctuations due to back-and-forth compensation. If the control threshold is relaxed, the broken wire rate will increase. Especially in the production of small-size fibers, existing methods cannot meet the requirements of predicting trends in advance before the melt viscosity reaches the dangerous threshold, nor can they establish a dynamic quantitative relationship between the viscosity safety control boundary and the real-time fluctuation direction, drawing speed and allowable diameter, and they cannot initiate precise intervention only when the production system enters a metastable state. Summary of the Invention

[0004] Because existing methods cannot adapt to the dynamic changes in production conditions, it is difficult to quantify the time-varying correlation between temperature and viscosity in real time. In particular, when the viscosity suddenly changes, if the temperature event segment that induces the change cannot be quickly locked and the real-time delay value cannot be calculated, the temperature compensation action will be disconnected from the viscosity change demand, and the flow control will lag behind the change in the melt state, resulting in a surge in the broken wire rate and deterioration of fiber quality. To address these problems, the present invention provides a basalt fiber drawing control method, system, equipment and medium.

[0005] A basalt fiber drawing control method includes: setting a preset time period according to the basalt fiber, obtaining the current moment and the historical moment before the current moment, obtaining a historical drawing diameter data sequence within the preset time period before the historical moment, and obtaining a stability index based on the historical drawing diameter data sequence; if the stability index exceeds a preset threshold, obtaining a historical melt viscosity data sequence within the preset time period before the historical moment, and obtaining a viscosity change direction based on the historical melt viscosity data sequence, and obtaining a drawing diameter change direction based on the viscosity change direction; if the diameter change direction is downward, obtaining a minimum viscosity value based on the drawing drawing speed and the minimum allowable diameter. value, and amplify the minimum viscosity value according to the stability index to form a first pretreatment reference viscosity value, and obtain the viscosity value of the melt to be monitored at the current moment. If the viscosity value of the melt to be monitored is less than the first pretreatment reference viscosity value, start to reduce the temperature of the leak plate for the melt to pass through; if the diameter change direction is increasing, obtain the maximum viscosity value according to the drawing speed and the maximum allowable diameter of the wire drawing, and reduce the maximum viscosity value according to the stability index to form a second pretreatment reference viscosity value, and obtain the viscosity value of the melt to be monitored at the current moment. If the viscosity value of the melt to be monitored is greater than the second pretreatment reference viscosity value, start to increase the temperature of the leak plate for the melt to pass through.

[0006] Optionally, obtaining the viscosity change direction based on the historical melt viscosity data sequence includes: subtracting the previous adjacent melt viscosity value from each melt viscosity value in the historical melt viscosity data sequence to obtain a change; adding the changes in the historical melt viscosity data sequence in sequence to obtain a total change, if the total change is greater than zero, the obtained viscosity change direction is increasing, and if the total change is not greater than zero, the obtained viscosity change direction is decreasing.

[0007] Optionally, obtaining the minimum viscosity value based on the drawing speed and the minimum allowable diameter of the wire drawing includes: obtaining a flow calculation value based on the drawing speed and the minimum allowable diameter of the wire drawing; obtaining a mapping relationship between flow and viscosity, and obtaining the minimum viscosity value based on the flow calculation value and the mapping relationship.

[0008] Optionally, stability indicators obtained based on historical wire drawing diameter data series include: ;in, is a stability indicator, is the number of collection time nodes in the historical wire drawing diameter data series, is the wire drawing diameter value corresponding to the i+1th acquisition time node in the historical wire drawing diameter data sequence, is the wire drawing diameter value corresponding to the i-th acquisition time node in the historical wire drawing diameter data sequence, is the standard wire drawing diameter variation.

[0009] Optionally, the minimum viscosity value is amplified according to the stability index to form a first pre-processed reference viscosity value expressed as: ;in, is the first pretreatment reference viscosity value, is a stability indicator, is the minimum viscosity.

[0010] Optionally, the maximum viscosity value is reduced according to the stability index to form a second pre-processed reference viscosity value expressed as: ;in, is the second pre-processing reference viscosity value, is a stability indicator, The maximum viscosity.

[0011] A basalt fiber drawing control system is also provided, which includes: an acquisition module for setting a preset time period according to the basalt fiber, and acquiring the current moment and the historical moment before the current moment, and acquiring a historical drawing diameter data sequence within the preset time period before the historical moment, and acquiring a stability index based on the historical drawing diameter data sequence; a data processing module for acquiring a historical melt viscosity data sequence within the preset time period before the historical moment when the stability index exceeds a preset threshold, and acquiring a viscosity change direction based on the historical melt viscosity data sequence, and acquiring a drawing diameter change direction based on the viscosity change direction; a first control module for, when the diameter change direction is downward, processing the drawing diameter according to the drawing speed and the maximum drawing speed; The minimum viscosity value is obtained based on the minimum allowable diameter, and the minimum viscosity value is amplified according to the stability index to form a first pretreatment reference viscosity value, and the viscosity value of the melt to be monitored at the current moment is obtained. If the viscosity value of the melt to be monitored is less than the first pretreatment reference viscosity value, the temperature of the leak plate for the melt to pass through is started to be reduced; the second control module is used to obtain the maximum viscosity value based on the drawing speed and the maximum allowable diameter of the wire drawing when the diameter change direction is increasing, and reduce the maximum viscosity value according to the stability index to form a second pretreatment reference viscosity value, and obtain the viscosity value of the melt to be monitored at the current moment. If the viscosity value of the melt to be monitored is greater than the second pretreatment reference viscosity value, the temperature of the leak plate for the melt to pass through is started to be increased.

[0012] Optionally, the data processing module is also used to: obtain a change by subtracting the previous adjacent melt viscosity value from each melt viscosity value in the historical melt viscosity data sequence; add the changes in the historical melt viscosity data sequence in sequence and obtain a total change. If the total change is greater than zero, the direction of the viscosity change obtained is increasing; if the total change is not greater than zero, the direction of the viscosity change obtained is decreasing.

[0013] An electronic device is also provided, comprising: a memory storing a computer program; and a processor for executing the computer program in the memory to implement the above-mentioned basalt fiber drawing control method.

[0014] Also provided is a non-transitory computer-readable storage medium having a computer program stored thereon, which implements the above-mentioned basalt fiber drawing control method when executed by a processor.

[0015] The beneficial effects of the present invention are embodied in:

[0016] In the entire basalt fiber drawing control method, first, a dynamic historical window and intelligent screening mechanism (triggered by stability indicator thresholds) based on melt characteristics adaptively are used to significantly reduce the frequency of ineffective interventions while ensuring timely control. Deep analysis is activated only when the system enters a metastable state (such as a surge in diameter sequence fluctuations), avoiding the temperature oscillation and energy waste caused by traditional continuous fine-tuning while significantly reducing computing power load. Furthermore, through the coupling and decoupling of viscosity and diameter change directions and the reconstruction of bidirectional preprocessing safety boundaries, the hysteresis control dilemma is overcome. To prevent fiber breakage (viscosity reduction), the stability indicator is used to dynamically amplify the minimum viscosity value to generate a high-level warning line. This allows for predictive cooling and viscosity increase 2-3 minutes before the viscosity falls below the danger threshold, completely eliminating the high-frequency fiber breakage risk in small fiber diameter production. To prevent out-of-tolerance (viscosity increase), the maximum viscosity value is compressed to form a sensitive threshold, triggering temperature increase and viscosity reduction before the viscosity exceeds the process tolerance limit, eliminating the risk of diameter exceeding the standard for high-viscosity melts. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly describes the drawings required for the specific embodiments or the description of the prior art. Similar elements or parts are generally identified by similar reference numerals throughout the drawings. Elements or parts in the drawings are not necessarily drawn to scale.

[0018] Figure 1 Schematic diagram of the process of the basalt fiber drawing control method of the present invention;

[0019] Figure 2 This is a schematic diagram of a portion of the flow chart of S2 of the basalt fiber drawing control method of the present invention;

[0020] Figure 3 Schematic diagram of the steps of the basalt fiber drawing control method of the present invention;

[0021] Figure 4 This is a schematic diagram of a portion of step S2 in the basalt fiber drawing control method of the present invention;

[0022] Figure 5This is a schematic diagram of a portion of step S3 in the basalt fiber drawing control method of the present invention;

[0023] Figure 6 The present invention is a block diagram of an electronic device according to an embodiment of the present invention.

[0024] Reference numerals:

[0025] 700 - electronic device, 701 - processor, 702 - memory, 703 - multimedia component, 704 - I / O interface, 705 - communication component. DETAILED DESCRIPTION

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are intended to fall within the scope of protection of the present invention.

[0028] It should be noted that similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings. In addition, the terms "first," "second," etc. are used only to distinguish the descriptions and are not to be understood as indicating or implying relative importance.

[0029] like Figure 1 、 Figure 2 and Figure 3 As shown, a basalt fiber drawing control method is provided, comprising:

[0030] S1. Setting a preset time period according to the basalt fiber, obtaining the current moment and a historical moment before the current moment, obtaining a historical drawing diameter data sequence within the preset time period before the historical moment, and obtaining a stability index based on the historical drawing diameter data sequence;

[0031] S2. If the stability index exceeds a preset threshold, a historical melt viscosity data sequence within a preset time period before the historical moment is obtained, and a viscosity change direction is obtained based on the historical melt viscosity data sequence, and a wire drawing diameter change direction is obtained based on the viscosity change direction;

[0032] S3. If the diameter change direction is downward, a minimum viscosity value is obtained based on the drawing speed and the minimum allowable diameter of the wire drawing, and the minimum viscosity value is amplified according to the stability index to form a first pre-processing reference viscosity value. The viscosity value of the melt to be monitored at the current moment is obtained. If the viscosity value of the melt to be monitored is less than the first pre-processing reference viscosity value, the temperature of the bushing for the melt to pass through is started to be reduced;

[0033] S4. If the direction of diameter change is increasing, the maximum viscosity value is obtained according to the drawing speed and the maximum allowable diameter of the wire drawing, and the maximum viscosity value is reduced according to the stability index to form a second pretreatment reference viscosity value, and the viscosity value of the melt to be monitored at the current moment is obtained. If the viscosity value of the melt to be monitored is greater than the second pretreatment reference viscosity value, the temperature of the leak plate for the melt to pass through is started to be increased.

[0034] In this embodiment, it should be noted that S1 is the start-up and screening link of the entire control logic, and its core purpose is to determine whether it is necessary to start the subsequent precise control process. It mainly constructs an indicator that can sensitively reflect the current production stability. To this end, a reasonable preset time period is first set. The selection of this preset time period is not arbitrary, but is based on the physical effects and change rate of the basalt melt. Specifically, it changes according to the changes in the adaptation of raw material characteristics. The mineral composition of different batches of basalt ore (such as differences in FeO / MgO content) will lead to differences in the rate of change of melt viscosity; highly active mineral melts (with more drastic viscosity changes) require a shorter preset time period to capture mutation signals more quickly (such as shortening the window from 10 minutes to 6 minutes); for compositionally stable melts, the time period can be appropriately extended (such as to 15 minutes) to avoid frequent response interference. Furthermore, based on changes in target fiber diameter constraints, when producing ultrafine fibers (diameter <7μm), the tolerance for diameter is extremely narrow (±0.5μm), so the time period needs to be shortened to improve monitoring sensitivity. However, when producing coarse-diameter fibers (>15μm), the tolerance is larger (±2μm), so the time period can be extended to balance system stability. Furthermore, based on changes in production process stages, short-term, high-frequency monitoring (e.g., a 5-minute window) is used during the initial furnace startup (when the melt is not fully homogenized). During steady-state production, a longer time period (e.g., 20 minutes) is used to reduce ineffective control actions.

[0035] Furthermore, the end of the preset time period (historical moment) must meet two conditions: the observed historical data (especially diameter data) must be of practical guiding significance for predicting current and near-future conditions (if the interval is too long, the historical data will not be fresh enough, and the prediction will be inaccurate); and it must also capture at least one complete cycle of the melt's small, inherent viscosity fluctuations (otherwise, it will be easily affected by transient noise and fail to reflect the true trend). More importantly, the time interval from this selected historical moment to the present must be strictly shorter than the minimum time required for the melt to reach an unacceptable, dangerous viscosity (resulting in wire breakage or diameter deviation) after it begins to deteriorate (viscosity begins to move towards a critical value). Only data series acquired during the preset time period before this historical moment can capture trends with early warning significance while also providing the necessary response buffer for subsequent control measures.

[0036] Furthermore, after determining a meaningful historical time period and its starting point, S1 acquires a series of historical wire drawing diameter values ​​within that time period. These diameter values ​​themselves, and how they change, are direct indicators of the melt state (particularly its viscosity stability). S1's core computational task is to calculate a "stability index" based on this historical diameter sequence. This index quantifies the severity of diameter fluctuations over the past period (essentially, the ratio of the average rate of change to a certain allowable baseline value). Higher values ​​indicate more severe and unstable diameter fluctuations over the past period, indicating a "metastable state" and accumulating quality risks.

[0037] In S2, only when the calculated stability index exceeds the safety line of the preset threshold (i.e., it is judged to be in a significant metastable state) will the S2, S3, or S4 control stages, which require more computing power but are more accurate, be entered. The preset threshold is manually set to mark the intermediate state between normal and unstable, namely metastable. If the index does not exceed the limit, it indicates that the recent operation is relatively stable, and the complex closed-loop control can be temporarily suspended to avoid unnecessary interference and resource consumption. For example, during the continuous production of a certain fiber specification, this index is calculated periodically. If the diameter series fluctuates significantly within the recently selected valid historical window (for example, the diameter changes from being very stable and almost unchanged to experiencing increasingly frequent fluctuations), indicating that the melt viscosity may begin to show an abnormal trend of fluctuation, S1 will output a high index signal (exceeding the threshold), triggering subsequent more precise viscosity trend analysis and preventive temperature control actions.

[0038] Furthermore, when the stability index exceeds the specified value (indicating fluctuations in the historical diameter sequence), S2 immediately focuses on the core internal factor, melt viscosity, and performs a dual core task: It retraces the viscosity history and, based on the dynamically preset time period determined by S1 (adapted to the fiber characteristics), retrieves melt viscosity data for the exact same time window as the historical diameter sequence. This is key to ensuring the traceability of the causal relationship between viscosity and diameter changes (since diameter fluctuations are simply the outward manifestation of viscosity changes). It then identifies the direction of viscosity evolution. Microscopic fluctuations in the viscosity data sequence contain trend information. S2 must accurately identify whether the overall viscosity within this time window is continuously increasing or decreasing. This directional judgment directly determines the subsequent temperature control strategy (triggering S3 or S4).

[0039] Furthermore, viscosity direction analysis utilizes a differential accumulation method, a design that balances noise immunity and trend sensitivity. Adjacent points are differentially measured to capture microscopic changes, calculating the viscosity difference between each time point and the previous point in the viscosity sequence. If the viscosity at the subsequent point is higher than the previous point, it is recorded as a positive increment; if it is lower, it is recorded as a negative increment. This differential processing can amplify continuous changes and suppress random detection noise (such as single-point instrument error). The cumulative value determines the macro trend, and all differential increments are superimposed to form the total change. If the total is significantly greater than zero (positive increments dominate), it indicates that the viscosity has continued to rise within the window period, and the output is "increasing diameter change direction." If the total is less than or equal to zero (negative increments dominate or are balanced), it is determined to be "decreasing diameter change direction." This logic can filter out occasional reverse fluctuations (such as a single short-term viscosity drop), ensuring that the direction judgment reflects the true main trend.

[0040] In S3, it is carried out when the direction of diameter change is downward, in order to prevent the risk of broken wires due to the continuous decrease in viscosity. The core is to build a pretreatment reference value (the first pretreatment reference viscosity value) that is earlier than the actual viscosity danger threshold to achieve early warning intervention. Specifically, first, based on the principle of fluid continuity, the process parameters are converted into physical constraints. The minimum allowable diameter (critical diameter for broken wire) and the current drawing speed jointly determine the minimum theoretical flow rate of the melt flowing through the leak plate (to avoid breaking the fiber due to insufficient feeding). The volume flow calculation formula in the existing technology is used. Calculated, where is the flow rate, D is the wire drawing diameter, and V is the drawing speed. Furthermore, combining the viscosity-flow rate mapping (derived from the process database), the minimum viscosity value required to guarantee this minimum flow rate is reversely calculated (if the actual viscosity falls below this value, the wire will inevitably break). This minimum viscosity value is a theoretical minimum safety line, and S3 dynamically amplifies it using a stability index. The higher the stability index (the more unstable), the larger the amplification factor (e.g., 2x to 3x), forming a more stringent first pretreatment reference viscosity value. The lower the index value (the more moderate the fluctuation), the more conservative the amplification (e.g., a minimum of 2x) is used to avoid oversensitivity.

[0041] Furthermore, early warning and control based on pretreatment values ​​are implemented. Specifically, the current real-time viscosity monitoring (the melt viscosity value to be monitored) is compared with the first pretreatment reference viscosity value, and predictive temperature control is implemented. As long as the current viscosity falls below the first pretreatment reference viscosity value (even if it is still above the minimum viscosity value), it is determined to be on the verge of loss of control and requires immediate intervention. Intervention measures include targeted temperature adjustment; cooling, by lowering the temperature of the bushing (reducing heat input), actively increases the melt viscosity and curbs its further decline; and restores the viscosity to a safe range (≥ the first pretreatment reference viscosity value), fundamentally avoiding wire breakage or scrap caused by diameter drop below the lower limit. In short, by establishing a dynamic safety buffer zone and targeted cooling intervention, S3 advances the wire breakage prevention point from the actual viscosity drop below the lower limit to before the viscosity approaches the theoretical critical point. This time window mitigates process delays and reduces the wire breakage rate, especially in high-fluctuation and small-diameter scenarios.

[0042] In S4, the system is implemented when the diameter changes in an upward direction to prevent the risk of exceeding the specified diameter due to a continuous increase in viscosity. This system achieves precise, early intervention by reconstructing the safety margin in reverse. Specifically, the maximum theoretical melt flow rate through the bushing is determined based on the maximum allowable diameter (quality limit) and the current drafting speed (to prevent excessive flow from causing excessive fiber coarsening). This is also calculated using the existing volume flow rate formula. Then, based on the viscosity-flow rate mapping, the maximum viscosity value required to achieve this maximum flow rate is inferred (if the actual viscosity exceeds this value, the diameter will exceed the specified tolerance). This maximum viscosity value is then compressed to form a second pre-processed reference viscosity value. This maximum viscosity value serves as the theoretical upper limit, and S4 dynamically compresses this value using a stability index. Higher stability index values ​​(greater instability) result in a greater compression ratio (e.g., 0.5x to 0.3x), creating a more stringent second pre-processed reference viscosity value (equivalent to providing a buffer zone before the critical upper limit). Lower index values ​​(minimal fluctuations) employ a conservative compression strategy (e.g., a minimum of 0.5x) to prevent false triggering.

[0043] Furthermore, predictive intervention based on compression thresholds is achieved. Specifically, the current real-time viscosity is compared with the second pretreatment reference viscosity value, and active regulation is performed; when the current viscosity is higher than the pretreatment value after compression (even if it is still lower than the theoretical maximum viscosity), it is determined that there is a trend of exceeding the diameter standard, and immediate intervention is required; the temperature of the leak plate is increased, and the heat input is increased to reduce the melt viscosity (viscosity is negatively correlated with temperature), inhibiting the thickening of the fibers; and the viscosity is brought back to a safe range (≤ the second pretreatment reference viscosity value) to avoid product degradation caused by the diameter exceeding the upper limit. In summary, S4 advances the diameter control node from the actual viscosity exceeding the upper limit to before the viscosity approaches the process tolerance threshold by constructing a compression-type early warning boundary and directional temperature increase intervention, especially in high-viscosity, large-diameter scenarios to solve batch quality defects caused by lagging control.

[0044] In summary, the entire basalt fiber drawing control method utilizes a dynamic history window and intelligent screening mechanism (triggered by a stability indicator threshold) based on melt characteristics adaptation. This significantly reduces the frequency of ineffective interventions while ensuring timely control. Deep analysis is activated only when the system enters a metastable state (e.g., when diameter sequence fluctuations surge), avoiding the temperature oscillation and energy waste caused by traditional continuous fine-tuning while significantly reducing computing power. Furthermore, through the coupling and decoupling of viscosity and diameter change directions and the reconstruction of a bidirectional preprocessing safety boundary, the system overcomes the hysteresis control dilemma. To prevent fiber breakage (viscosity reduction), the stability indicator dynamically amplifies the minimum viscosity value to generate a high-level warning line. This allows for predictive cooling and viscosity increase 2-3 minutes before the viscosity falls below the danger threshold, completely eliminating the high-frequency fiber breakage risk in small-diameter production. To prevent out-of-tolerance (viscosity increase), the maximum viscosity value is compressed to form a sensitive threshold, triggering temperature increase and viscosity reduction before the viscosity exceeds the process tolerance limit, eliminating the risk of diameter exceeding the specification for high-viscosity melts.

[0045] like Figure 1 、 Figure 2 and Figure 4 As shown, in one embodiment, obtaining the viscosity change direction according to the historical melt viscosity data sequence in S2 includes:

[0046] S21. Subtracting the previous adjacent melt viscosity value from each melt viscosity value in the historical melt viscosity data sequence to obtain a change;

[0047] S22. Add the changes in the historical melt viscosity data sequence in sequence to obtain a total change. If the total change is greater than zero, the direction of the viscosity change is increasing; if the total change is not greater than zero, the direction of the viscosity change is decreasing.

[0048] In this embodiment, it should be noted that in S21, the continuous historical viscosity data is converted into a quantifiable and analyzable instantaneous change sequence. For each viscosity measurement within a preset time period, the algebraic difference between the viscosity value at the previous adjacent time point is calculated: if the current value is higher than the previous value, the difference is positive (indicating an upward trend in viscosity); if it is lower than the previous value, the difference is negative (indicating a downward trend). This physical significance lies in: capturing the true trend of changes in adjacent nodes. For example, when the viscosity increases from 100 units to 105 units, the difference is +5, clearly indicating a short-term increase. It also eliminates absolute magnitude interference. Regardless of the viscosity baseline at 1000 units or 2000 units, a difference of +5 indicates the same increase in strength, preventing a high base value from masking weak fluctuations. It also amplifies continuous change signals. Three consecutive differences of +3 (viscosity: 100 → 103 → 106 → 109) will form a cumulative trend signal of +9, while a single sudden change of +9 (such as 100 → 109) is identified as an isolated event, which may be just detection noise.

[0049] In S22, algebraic accumulation and summation are performed on the above-mentioned difference sequence, which is essentially to quantify the net displacement of viscosity over the entire time period: if the sum is significantly greater than zero, it indicates that positive increments dominate and the viscosity has a continuous upward momentum (for example, the sequence [+2, -1, +5, -1] accumulates to 5>0, which determines the upward direction); if the sum is less than or equal to zero, it indicates that negative increments dominate or the positive and negative values ​​cancel each other out, and the viscosity is stable or decreasing (for example, the sequence [+1, -3, +2, -4] accumulates to -4≤0, which determines the downward direction). Noise resistance is enhanced. Accidental single-point fluctuations (such as +5 or -5 caused by instrument errors) will be diluted by the opposite changes of other points (for example, the accumulation of [+5, -1, -1, -1] is +2>0, which is still judged to be rising). Trend inertia is identified. Sustained weak rises (such as 6 +0.5) accumulate to +3>0, which can be effectively captured to avoid missing small slow-changing trends. The average value trap is avoided. Oscillating sequences with the same mean (such as [+5, -5, +5, -5]) accumulate to 0 and are not mistakenly judged as an upward trend.

[0050] like Figure 1 and Figure 5 As shown, in one embodiment, obtaining the minimum viscosity value according to the drawing speed and the minimum allowable diameter of the wire drawing in S3 includes:

[0051] S31, obtaining a flow calculation value according to the drawing speed and the minimum allowable diameter of the wire drawing;

[0052] S32: Obtain a mapping relationship between flow rate and viscosity, and obtain a minimum viscosity value according to the flow rate calculation value and the mapping relationship.

[0053] In this embodiment, it should be noted that in S31, the operating parameters of the wire drawing process are converted into key physical constraint values ​​(melt flow rate), and its execution logic is closely linked to the principle of fluid continuity. The input parameters are directional selected, and the minimum allowable diameter (the lower limit of the critical diameter to prevent wire breakage) and the current real-time drawing speed are clearly used as the calculation basis. According to the product relationship between the fiber cross-sectional area and the drawing speed, a melt flow rate theoretical model is established. The minimum allowable diameter determines the minimum cross-sectional area of ​​the fiber (the smaller the diameter, the smaller the cross-sectional area), and the current drawing speed determines the fiber drawing length per unit time; the combination of the two gives the minimum theoretical melt flow rate to ensure fiber continuity; that is, the volume flow rate calculation formula ,in, is the flow rate, D is the wire drawing diameter, and V is the drawing speed.

[0054] In S32, based on the melt rheological properties database, the flow rate value is reverse-mapped to the viscosity control boundary. First, a flow rate-viscosity mapping table is retrieved from the process database. This mapping is constructed through three steps: dynamic process modeling, industrial data integration, and experimental calibration. Currently, established mapping tables for different basalt sources (such as high-calcium and high-silicon types) are available. Furthermore, using the minimum flow rate calculated in S31 as input, the viscosity required to maintain that flow rate is searched in the mapping table and used as the minimum viscosity value.

[0055] It should also be noted that the processing flow for obtaining the maximum viscosity value based on the drawing speed and the maximum allowable diameter of the wire drawing in S4 is the same as that for obtaining the minimum viscosity value based on the drawing speed and the minimum allowable diameter of the wire drawing in S3, except that the minimum allowable diameter is calculated in S3, while the maximum allowable diameter is calculated in S4.

[0056] In one embodiment, obtaining the stability index according to the historical wire drawing diameter data sequence in S1 includes:

[0057] ;in,

[0058] is a stability indicator, is the number of collection time nodes in the historical wire drawing diameter data series, is the wire drawing diameter value corresponding to the i+1th acquisition time node in the historical wire drawing diameter data sequence, is the wire drawing diameter value corresponding to the i-th acquisition time node in the historical wire drawing diameter data sequence, is the standard wire drawing diameter variation.

[0059] In this embodiment, it should be noted that in the numerator of the entire expression, Sum the differences of adjacent points and calculate the instantaneous change of each adjacent node in the historical diameter series; directly capture the microscopic transient behavior of the diameter (such as a jump of 0.5μm, an increase of 0.3μm), rather than the overall mean (the mean will mask the instantaneous risk). Further, then through Normalization is performed before taking the absolute value. The average change in the sum of differences is obtained to eliminate interference from the number of data points m (e.g., a 5-minute window contains 30 points versus a 20-minute window contains 120 points). This also makes the fluctuation intensity of windows of different lengths comparable (e.g., the high-frequency jumps in short windows and the slow-changing drifts in long windows are dimensionally consistent). Furthermore, taking the absolute value ignores the direction of fluctuation (up / down), focusing on the amplitude. Regardless of whether the diameter exceeds tolerance or the risk of wire breakage decreases, any deviation from the stable state will trigger a warning, meeting the core definition of a "metastable state."

[0060] Furthermore, in the denominator of the entire expression, the standard wire drawing diameter change is used. , which is dynamically anchored by the process benchmark and is not a fixed value, but is dynamically adjusted according to the current fiber specifications produced: for ultra-fine fibers (such as 7μm±0.5μm), Set to 0.2μm (strict standard); for coarse fibers (such as 18μm±2μm): Set to 3μm (loose benchmark). Use the denominator to convert the average fluctuation range into a relative deviation rate. For example, if the average fluctuation of microfiber is 0.2μm, , (equal to threshold 1); the same 0.2 μm fluctuation in coarse fibers (Far below threshold 1.) Adaptive stability assessment for different operating conditions avoids missing small fluctuations in fibers with small tolerances (e.g., 0.2μm is a serious risk for 7μm fibers, but is tolerable for 18μm fibers).

[0061] In one embodiment, in S3, the minimum viscosity value is amplified according to the stability index to form a first pre-processed reference viscosity value represented as:

[0062] ;in,

[0063] is the first pretreatment reference viscosity value, is a stability indicator, is the minimum viscosity.

[0064] In this embodiment, it should be noted that, in the entire expression, The constant 2 in the formula is the preset minimum amplification factor, even if the stability index Lower (such as =1.2, indicating slight fluctuations), it is still necessary to maintain a safety buffer zone of 2 times the minimum viscosity; this design forces the minimum warning advance to prevent wire breakage due to lack of timely intervention under low fluctuation conditions. ),when When directly using As a magnification factor; for instability Positively correlated with required safety margin: High Scenes (such as ), the amplification factor is 3.5 times, and a wider buffer zone is set before the minimum viscosity value (the higher the risk, the earlier the intervention); critical Scenes (such as ): The coefficient is taken as 2.2 times to balance sensitivity and over-control risk.

[0065] In summary, the expression achieves a balance between predictability and adaptability; this expression is designed by forcing the lower limit and dynamic upper limit coefficients to set the theoretical viscosity lower limit Converted into a pre-processing value for real-time risk matching, the mandatory lower limit ensures that the first pre-processing reference viscosity value exceeds the minimum viscosity value by more than 2 times, solving the contradiction that the response speed is not enough to cover the deterioration speed; dynamic coupling Achieve more advanced adaptive control for more unstable interventions; finally, anchor the control by physical boundaries ( ) Ensure that scale-up operations remain within fluid mechanics constraints. This creates a buffer period during critical time periods, completely avoiding batch wire breakage caused by delays in traditional control.

[0066] In one embodiment, in S4, the maximum viscosity value is reduced according to the stability index and a second pre-processed reference viscosity value is formed, which is expressed as:

[0067] ;in,

[0068] is the second pre-processing reference viscosity value, is a stability indicator, The maximum viscosity.

[0069] In this embodiment, it should be noted that, in the entire expression, A two-way restriction is built; first, the upper limit is compressed by 1 / 2 to ensure that the maximum compression ratio does not exceed 0.5 times, to prevent extreme scenarios (such as Very small) leading to too strict threshold (e.g. More than 0.5), to avoid frequent temperature fluctuations. Further, Compression driven for stability; high Scenes (such as ), , then take 0.25 times compression (stricter warning line); low Scenes (such as ), , but limited by the min function, take 0.5 times compression (conservative defense). In summary, The higher it is (the more unstable the system), the smaller the compression ratio (such as 0.25 times), that is, the closer the warning line is to the current viscosity, and the earlier intervention in the rising viscosity trend can be achieved.

[0070] Compared with the relatively symmetrical design of S3: S3 has anti-breaking wire, The larger it is, the higher the coefficient is, and the higher the warning line is (preemptive defense against viscosity drop); S4 prevents out-of-tolerance, The larger it is, the lower the compression ratio is and the lower the warning line is (preemptive defense against viscosity increase).

[0071] A basalt fiber drawing control system is also provided, which includes:

[0072] An acquisition module is used to set a preset time period according to the basalt fiber, obtain the current moment and the historical moment before the current moment, obtain the historical drawing diameter data sequence within the preset time period before the historical moment, and obtain the stability index based on the historical drawing diameter data sequence;

[0073] A data processing module is used to obtain a historical melt viscosity data sequence within a preset time period before a historical moment when the stability index exceeds a preset threshold, and obtain a viscosity change direction based on the historical melt viscosity data sequence, and obtain a wire drawing diameter change direction based on the viscosity change direction;

[0074] a first control module configured to obtain a minimum viscosity value based on the drawing speed and the minimum allowable diameter of the wire drawing when the diameter change direction is downward, amplify the minimum viscosity value based on the stability index to form a first pre-processing reference viscosity value, obtain the viscosity value of the melt to be monitored at the current moment, and start to reduce the temperature of the bushing for the melt to pass through if the viscosity value of the melt to be monitored is less than the first pre-processing reference viscosity value;

[0075] The second control module is used to obtain the maximum viscosity value according to the drawing speed and the maximum allowable diameter of the wire drawing when the diameter change direction is increasing, and to reduce the maximum viscosity value according to the stability index to form a second pretreatment reference viscosity value, and to obtain the viscosity value of the melt to be monitored at the current moment. If the viscosity value of the melt to be monitored is greater than the second pretreatment reference viscosity value, the temperature of the leakage plate for the melt to pass through is started to be increased.

[0076] In one embodiment, the data processing module is further used to: subtract the previous adjacent melt viscosity value from each melt viscosity value in the historical melt viscosity data sequence to obtain a change; add the changes in the historical melt viscosity data sequence in sequence to obtain a total change, if the total change is greater than zero, the direction of the viscosity change obtained is increasing, if the total change is not greater than zero, the direction of the viscosity change obtained is decreasing.

[0077] In this embodiment, it should be noted that, regarding the above-mentioned basalt fiber drawing control system, the specific manner of performing operations therein has been described in detail in the embodiment of the basalt fiber drawing control method, and will not be elaborated here.

[0078] Figure 6 FIG. 1 is a block diagram of an electronic device for a basalt fiber drawing control method according to an exemplary embodiment. Figure 6 As shown, the electronic device 700 may include: a processor 701 , a memory 702 , and may further include one or more of a multimedia component 703 , an I / O interface 704 (input / output interface), and a communication component 705 .

[0079] The processor 701 is used to control the overall operation of the electronic device 700 to complete all or part of the steps in the above-mentioned basalt fiber drawing control method. The memory 702 is used to store various types of data to support the operation of the electronic device 700. This data may include, for example, instructions for any application or method operating on the electronic device 700, as well as application-related data such as contact information, sent and received messages, images, audio, video, etc. The memory 702 can be implemented by any type of volatile or non-volatile storage device, or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk. The multimedia component 703 may include a screen and an audio component. The screen may be, for example, a touch screen, and the audio component is used to output and / or input audio signals. For example, the audio component may include a microphone for receiving external audio signals. The received audio signals may be further stored in the memory 702 or transmitted via the communication component 705. The audio component also includes at least one speaker for outputting audio signals. The I / O interface 704 provides an interface between the processor 701 and other interface modules, which may include a keyboard, a mouse, buttons, etc. These buttons may be virtual or physical buttons. The communication component 705 is used for wired or wireless communication between the electronic device 700 and other devices. Wireless communication, such as Wi-Fi, Bluetooth, Near Field Communication (NFC), 2G, 3G, 4G, NB-IOT, eMTC, or other 5G networks, or a combination thereof, is not limited here. Accordingly, the communication component 705 may include a Wi-Fi module, a Bluetooth module, an NFC module, etc.

[0080] In an exemplary embodiment, the electronic device 700 can be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to execute the above-mentioned basalt fiber drawing control method.

[0081] In another exemplary embodiment, a computer-readable storage medium including program instructions is further provided. When executed by a processor, the program instructions implement the steps of the above-mentioned basalt fiber drawing control method. For example, the computer-readable storage medium may be the aforementioned memory 702 including the program instructions. The program instructions may be executed by the processor 701 of the electronic device 700 to implement the above-mentioned basalt fiber drawing control method.

[0082] In another exemplary embodiment, a computer program product is further provided. The computer program product includes a computer program executable by a programmable device, and the computer program has a code portion for executing the above-mentioned basalt fiber drawing control method when executed by the programmable device.

[0083] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details of the above embodiments. Within the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the scope of protection of the present disclosure.

[0084] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0085] In addition, the various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

[0086] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and description of the present invention.

Claims

1. A basalt fiber drawing control method, characterized in that: include: A preset time period is set according to the basalt fiber, and the current moment and the historical moment before the current moment are obtained, and a historical drawing diameter data sequence within the preset time period before the historical moment is obtained, and a stability index is obtained based on the historical drawing diameter data sequence; If the stability index exceeds a preset threshold, a historical melt viscosity data sequence within a preset time period before the historical moment is obtained, and a viscosity change direction is obtained based on the historical melt viscosity data sequence, and a wire drawing diameter change direction is obtained based on the viscosity change direction; If the diameter change direction is downward, the minimum viscosity value is obtained according to the drawing speed and the minimum allowable diameter of the wire drawing, and the minimum viscosity value is amplified according to the stability index to form a first pre-processing reference viscosity value, and the viscosity value of the melt to be monitored at the current moment is obtained. If the viscosity value of the melt to be monitored is less than the first pre-processing reference viscosity value, the temperature of the bushing for the melt to pass through is started to be reduced; If the diameter change direction is increasing, the maximum viscosity value is obtained according to the drawing speed and the maximum allowable diameter of the wire drawing, and the maximum viscosity value is reduced according to the stability index to form a second pretreatment reference viscosity value, and the viscosity value of the melt to be monitored at the current moment is obtained. If the viscosity value of the melt to be monitored is greater than the second pretreatment reference viscosity value, the temperature of the bushing for the melt to pass through is started to be increased; Wherein, obtaining the minimum / maximum value of viscosity according to the drawing speed and the minimum / maximum allowable diameter of the wire drawing includes: obtaining a flow calculation value according to the drawing speed and the minimum / maximum allowable diameter of the wire drawing; obtaining a mapping relationship between flow and viscosity, and obtaining the minimum / maximum value of viscosity according to the flow calculation value and the mapping relationship; The first pre-treatment reference viscosity value is expressed as: ;in, is the first pretreatment reference viscosity value, is a stability indicator, is the minimum viscosity; The second pre-processed reference viscosity value is expressed as: ;in, is the second pre-processing reference viscosity value, is a stability indicator, The maximum viscosity.

2. The basalt fiber drawing control method according to claim 1, characterized in that: The method of obtaining the viscosity change direction according to the historical melt viscosity data sequence includes: The change is obtained by subtracting the previous adjacent melt viscosity value from each melt viscosity value in the historical melt viscosity data sequence; The changes in the historical melt viscosity data sequence are sequentially added to obtain a total change. If the total change is greater than zero, the direction of the viscosity change is increasing; if the total change is not greater than zero, the direction of the viscosity change is decreasing.

3. The basalt fiber drawing control method according to claim 1, characterized in that: The obtaining of stability indicators based on the historical wire drawing diameter data sequence includes: ;in, is a stability indicator, is the number of collection time nodes in the historical wire drawing diameter data series, is the wire drawing diameter value corresponding to the i+1th acquisition time node in the historical wire drawing diameter data sequence, is the wire drawing diameter value corresponding to the i-th acquisition time node in the historical wire drawing diameter data sequence, is the standard wire drawing diameter variation.

4. A basalt fiber drawing control system, characterized in that: The system comprises: An acquisition module is used to set a preset time period according to the basalt fiber, obtain the current moment and the historical moment before the current moment, obtain the historical drawing diameter data sequence within the preset time period before the historical moment, and obtain the stability index based on the historical drawing diameter data sequence; A data processing module is used to obtain a historical melt viscosity data sequence within a preset time period before a historical moment when the stability index exceeds a preset threshold, and obtain a viscosity change direction based on the historical melt viscosity data sequence, and obtain a wire drawing diameter change direction based on the viscosity change direction; a first control module configured to obtain a minimum viscosity value based on the drawing speed and the minimum allowable diameter of the wire drawing when the diameter change direction is downward, amplify the minimum viscosity value based on the stability index to form a first pre-processing reference viscosity value, obtain the viscosity value of the melt to be monitored at the current moment, and start to reduce the temperature of the bushing for the melt to pass through if the viscosity value of the melt to be monitored is less than the first pre-processing reference viscosity value; a second control module, configured to obtain a maximum viscosity value according to the drawing speed and the maximum allowable diameter of the wire drawing when the diameter change direction is increasing, reduce the maximum viscosity value according to the stability index and form a second pre-processing reference viscosity value, and obtain the viscosity value of the melt to be monitored at the current moment; if the viscosity value of the melt to be monitored is greater than the second pre-processing reference viscosity value, start to increase the temperature of the bushing for the melt to pass through; Wherein, obtaining the minimum / maximum viscosity value according to the drawing speed and the minimum allowable diameter of the wire drawing includes: obtaining a flow calculation value according to the drawing speed and the minimum / maximum allowable diameter of the wire drawing; obtaining a mapping relationship between the flow rate and the viscosity, and obtaining the minimum / maximum viscosity value according to the flow calculation value and the mapping relationship; The first pre-treatment reference viscosity value is expressed as: ;in, is the first pretreatment reference viscosity value, is a stability indicator, is the minimum viscosity; The second pre-processed reference viscosity value is expressed as: ;in, is the second pre-processing reference viscosity value, is a stability indicator, The maximum viscosity.

5. The basalt fiber drawing control system according to claim 4, characterized in that: The data processing module is further configured to: The change is obtained by subtracting the previous adjacent melt viscosity value from each melt viscosity value in the historical melt viscosity data sequence; The changes in the historical melt viscosity data sequence are sequentially added to obtain a total change. If the total change is greater than zero, the direction of the viscosity change is increasing; if the total change is not greater than zero, the direction of the viscosity change is decreasing.

6. An electronic device, characterized in that: include: a memory having a computer program stored thereon; A processor, configured to execute the computer program in the memory to implement the basalt fiber drawing control method according to any one of claims 1 to 3.

7. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the basalt fiber drawing control method described in any one of claims 1 to 3 is implemented.

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