A production line control method and system for superconducting enameled wire

Abstract

The application belongs to the field of wire processing, and provides a superconducting enameled wire production line control method and system. When the superconducting enameled wire production line is working, paint coating data and detection data of the superconducting enameled wire production line are collected. Whether the paint coating data has tension fluctuation is judged in real time. If yes, the superconducting enameled wire production line is controlled to stop or the equipment operation parameters of the superconducting enameled wire production line are adjusted. Otherwise, the superconducting enameled wire production line continues to run. The tension fluctuation of the wire can be dynamically monitored under the process requirement of the superconducting wire under low tension, the insignificant tension fluctuation can be identified, the production line is controlled to avoid affecting the paint film quality, so that the tension of the enameled wire is stabilized, and the tension fluctuation rate is inhibited.

Description

Technical Field

[0001] This invention belongs to the field of wire processing technology, specifically relating to a production line control method and system for superconducting enameled wire. Background Technology

[0002] In the fabrication process of superconducting enameled wires, tension fluctuations caused by excessive or insufficient tension can lead to problems. This is especially true for superconducting wires such as niobium-titanium (NbTi), where improper tension control can damage the superconducting core, introduce defects, or cause the enamel film to crack / peel, thus affecting superconducting performance and mechanical reliability. During the coating process on the production line, excessive tension can stretch the wire (especially NbTi / Cu composite wires, which have limited ductility), causing the coating to be "thinned" or even discontinuous; insufficient tension can cause wrinkles and enamel buildup, resulting in localized thick films. NbTi wires are typically multi-core composite structures (NbTi wires embedded in a copper substrate), and uneven tension can easily cause the core wires to shift or break, preventing uniform enamel coating. During the curing / drying process, the constraints created by tension fluctuations can limit enamel film shrinkage and introduce residual tensile stress; large tension fluctuations can easily lead to debonding of the enamel film at the wire interface or cracking of the enamel layer. NbTi superconducting wires are sensitive to mechanical stress—if the tensile stress within the coating is transmitted to the NbTi superconducting core (critical strain is typically <1%), it may induce microcracks and central failure, significantly reducing the critical current density.

[0003] In the production line of superconducting enameled wire, constant tension winding (usually a few Newtons to tens of Newtons), low-temperature curing, and high-adhesion polyimide or polyester varnish are commonly used in industry for the winding and unwinding of enameled wire, and tension fluctuations are strictly controlled. However, if the tension fluctuations change too quickly, it will cause rheological imbalance of the varnish during the coating process, directly affecting the consistency of the thickness of each varnish film. In order to avoid tension fluctuations, the tension needs to be controlled within a range that allows the wire varnish film to be stable. Existing technologies generally use PID control or feedforward feedback control to adjust the unwinding speed of the winding machine, thereby stabilizing the tension of the enameled wire and suppressing the tension fluctuation rate. For example, in the reference: Zhao Kaijie. Research on tension control system of enameled wire for winding machine [D]. Zhejiang University [2026-06-06], feedforward feedback control significantly reduced tension fluctuations. Under experimental conditions, the tension fluctuations of feedforward feedback control decreased by 80%.

[0004] However, due to the unique characteristics of superconducting wire materials such as NbTi, which are composite wires with brittle superconducting phases dispersed in a ductile copper matrix, their overall plasticity is poor, especially after multiple drawing processes. If the tension of coated superconducting wire materials exceeds 100–300 MPa (depending on the wire diameter and heat treatment state), it may cause plastic deformation, core wire breakage, or interface delamination. Therefore, under low tension, superconducting wires are almost relaxed. Disturbances such as guide roller friction, airflow disturbance, and slight changes in roll diameter account for a large proportion of the tension itself. The small corrections of the PID output are usually canceled out by dead zones, friction, or hysteresis. It is difficult to forcibly stabilize tension fluctuations through ordinary PID control or feedforward feedback control. At low tension, the material elastic deformation accounts for a high proportion and nonlinearity is significant (such as stick-slip effect and coating-substrate interface slippage). Traditional models based on the constant stiffness assumption fail, and feedforward models are inaccurate. The feedforward term is not only ineffective but also introduces additional disturbances. The differential term of the PID is sensitive to high-frequency noise (vibration is more likely to excite high-frequency modes at low tension), and the integral term is prone to saturation under continuous small errors. At high speeds, the fixed-parameter PID cannot balance rapid suppression and stability, especially without real-time roll diameter / speed co-compensation. Summary of the Invention

[0005] The purpose of this invention is to propose a production line control method and system for superconducting enameled wires, so as to solve one or more technical problems existing in the prior art, and at least provide a beneficial option or create conditions.

[0006] A production line control method for superconducting enameled wire is provided, which is applied to a superconducting enameled wire production line, wherein the superconducting enameled wire production line includes a wire feeding device, a forming device, an annealing device, a coating device, an inspection device, and a winding device arranged in sequence.

[0007] According to one aspect of the present invention, a production line control method for superconducting enameled wire is provided, the production line control method for superconducting enameled wire comprising the following steps:

[0008] While working on the superconducting enameled wire production line, collect coating data and testing data of the superconducting enameled wire production line; The system can detect tension fluctuations in the coating data in real time. If so, it can control the superconducting enameled wire production line to stop or adjust the equipment operating parameters of the superconducting enameled wire production line; otherwise, the superconducting enameled wire production line continues to operate.

[0009] The coating data includes the tension of the coated wire, the speed of the coated wire, the temperature of the coating liquid, the ambient temperature of the coating environment, the baking temperature, the baking time, and the cross-sectional dimensions of the wire after each coating. The test data includes the cross-sectional dimensions of the finished wire, the number of pinholes, the location of the pinholes, the number of surface bumps and depressions, and the location of surface bumps and depressions. In the production line of superconducting enameled wires, especially during the high-temperature baking and curing process of the coating, fluctuations in tension can lead to thermal stress coupling, exacerbating the risk of coating film cracking or delamination. To avoid the aforementioned problems caused by tension fluctuations in the wire under the low tension required by superconducting wire materials, the specific method is as follows: Furthermore, the method for real-time determination of whether tension fluctuations occur in the paint coating data includes the following steps: The tension of the painted wire collected during the test period (i.e., the records) is arranged into a sequential dataset ZL according to the time of collection; the mean value of the tension of the painted wire in the sequential dataset ZL is denoted as the average tension. In the sequential dataset ZL, values ​​greater than the average tension are selected and recorded as strong tension values. Each strong tension value is then evaluated sequentially. If a strong tension value is less than the previous value PEAK in ZL, and PEAK is greater than the previous value PEAK in ZL, then these strong tension values ​​are marked as peak inflection points. (That is, PEAK is the local peak of the fluctuation, and the peak inflection point is the position where the value first decreases after the local peak, that is, the first inflection point value when the value falls back from the peak of the fluctuation). In the sequential dataset ZL, values ​​less than the average tension are selected and recorded as weak tension values. Each weak tension value is then evaluated sequentially. If a weak tension value is greater than its preceding value in ZL (Valley), and Valley is less than Valley's preceding value in ZL, these weak tension values ​​are marked as valley inflection points. (That is, Valley represents a local trough in the fluctuation, and the valley inflection point is the position of the first increase in value after the local trough, i.e., the first inflection point value rising from the trough of the fluctuation). The maximum value among all peak inflection points is the peak maximum inflection point value; the minimum value among all valley inflection points is the valley minimum inflection point value. In the sequential dataset ZL, the time interval from the acquisition time of the peak maximum inflection point to the acquisition time of the value before the trough inflection point is denoted as the tension reduction period. In the sequential dataset ZL, the time interval from the acquisition time of the minimum inflection point of the trough to the acquisition time of the value before the peak inflection point is denoted as the tension increase period; (wherein, the peak inflection point and the trough inflection point represent the inflection point value of the tension change at the limit state of tension fluctuation in the tension of the coated wire, and the tension decrease period and the tension increase period represent the time interval of the smooth recovery process after the tension fluctuation reaches the limit state, respectively. The tension values ​​in these two periods are decreasing and increasing respectively (due to the inertia in the recovery process after the tension reaches the fluctuation limit, this period is likely to be a continuous increasing or decreasing relationship. Using this inertia to generate the time interval, it is easy to determine whether the tension fluctuation of the previous time window will affect the paint film). It is the recovery process after the tension generates the limit fluctuation. In this process, due to the influence of the previous fluctuation peak and fluctuation trough, the paint film of the wire coating is rheologically unbalanced during the coating process, which directly affects the consistency of the thickness of each paint film. Moreover, the tension generating the limit fluctuation before the tension decrease period and the tension increase period is likely to cause the number of pinholes or surface irregularities in the paint film to show an increasing trend). If the number of pinholes or surface irregularities exceeds the set threshold during periods of decreased or increased tension, it is determined that tension fluctuation has occurred in the detection data.

[0010] Alternatively, if the number of pinholes or surface irregularities exceeds the number before the tension reduction period or the tension increase period after the tension reduction period, then the test data is judged to have experienced tension fluctuation.

[0011] Since tension fluctuations are highly likely to occur suddenly, like pulsed peaks or troughs, and if the tension fluctuations are consistently small, consisting of insignificant discrete small fluctuations, these small wavebands superimposed, the methods described above cannot identify this situation, easily overlooking the impact of this problem on the paint film. To solve this problem, this invention proposes a method for identifying such tension fluctuations, specifically: Furthermore, specific methods for real-time determination of whether tension fluctuations occur in the paint coating data include: The tension of the painted wire collected during the test period is arranged into a sequential dataset ZL according to the time of collection; the mean value of the tension of the painted wire in the sequential dataset ZL is denoted as the average tension. In the sequential dataset ZL, values ​​greater than the average tension are selected and recorded as strong tension values. Each strong tension value is judged in turn. If a strong tension value is less than the previous value PEAK in ZL, and PEAK is greater than the previous value PEAK in ZL, then these strong tension values ​​are marked as peak inflection points. In the sequential dataset ZL, values ​​less than the average tension are selected and recorded as weak tension values. Each weak tension value is judged in turn. If a weak tension value is greater than the previous value Valley in ZL, and Valley is less than the previous value Valley in ZL, then these weak tension values ​​are marked as valley inflection points. The maximum value among all peak inflection points is the peak maximum inflection point value; the minimum value among all valley inflection points is the valley minimum inflection point value. The number of peak inflection points is recorded as the number of strong fluctuations; the number of trough inflection points is recorded as the number of weak fluctuations; the average value of each peak inflection point is used as the benchmark peak value; the sum of the differences between each peak inflection point greater than the benchmark peak value and the benchmark peak value is used as the fluctuation peak superposition value. The average of each valley inflection point is taken as the benchmark valley value; the sum of the differences between the benchmark valley value and each valley inflection point that is less than the benchmark valley value is taken as the fluctuation valley superposition value. If the number of strong fluctuations is greater than the number of weak fluctuations, and the maximum inflection point value of the wave peak is greater than or equal to the superposition value of the wave peaks, then it is determined that the detected data has experienced tension fluctuations. If the number of strong fluctuations is less than the number of weak fluctuations, and the sum of the fluctuation troughs is greater than or equal to the minimum inflection point value of the trough, then it is determined that the detected data has experienced tension fluctuations.

[0012] Among them, the peak fluctuation superposition value is the superposition value of the difference between the larger tension peak value when the tension increases to a local peak and the reference peak value. The valley fluctuation superposition value is the superposition value of the difference between the reference peak value and the smaller tension peak value when the tension decreases to a local trough value. They represent the superposition value of discrete peak fluctuations and discrete valley fluctuations in the test cycle, respectively. They can reflect the insignificant strong and weak fluctuations of tension over a period of time. By comparing with the peak maximum inflection point value and the valley fluctuation superposition value, insignificant tension fluctuations can be identified, thereby controlling the production line to avoid affecting the quality of the paint film.

[0013] The wire feeding equipment receives circular wires, while the forming equipment extrudes these circular wires into flat wires or even smaller diameter circular wires, increasing their length. By obtaining the position of the joints between two adjacent superconducting wires, it is possible to determine whether the joint is located within the superconducting enameled wire production line and the specific process in which it occurs. Furthermore, by combining this information with assessments of abnormal processes, the control methods for the equipment operation of the superconducting enameled wire production line can be adjusted to minimize waste while ensuring the length of the superconducting wire.

[0014] Specifically, both the painting data and the test data have corresponding threshold ranges, which are the range between the minimum and maximum values.

[0015] It should be noted that when at least one of the process data exceeds the threshold range, indicating an abnormal process, the equipment or controller will issue an abnormal alarm, manually adjust the equipment operating parameters of the production line, and have the controller record the abnormal conductor length range.

[0016] The wire is an alloy superconducting material, and the alloy superconducting material is composed of niobium-based alloys (such as niobium-titanium alloys, niobium-zirconium alloys, etc.); preferably, the alloy superconducting material is a niobium-titanium alloy.

[0017] Furthermore, the wire specification is set at Φ1.500mm.

[0018] Furthermore, the winding device includes a winding spool and a laser detector. The laser detector is used for monitoring the position of the wire at the end of the spool, that is, detecting whether the wire has reached the end of the winding spool.

[0019] Furthermore, the length of the wire between the outlet end of the wire feeding device and the outlet end of the coating device is the online processing length, and the process in which the midpoint of the online processing length is located is the midpoint process; Furthermore, the method for controlling the shutdown of the superconducting enameled wire production line is as follows: when the coating data exceeds the threshold range, if two adjacent superconducting wire connectors are located at or after the midpoint process, the superconducting enameled wire production line is shut down; if two adjacent superconducting wire connectors are located before the midpoint process, the equipment operating parameters of the superconducting enameled wire production line are adjusted; if the process data does not recover to the threshold range after the two superconducting wire connectors have reached the midpoint process, the superconducting enameled wire production line is shut down.

[0020] Furthermore, the specific method for controlling and adjusting the equipment operating parameters of the superconducting enameled wire production line is as follows: At each set time threshold, gradually reduce the tension of the coated wire by 2%-10% until the number of pinholes or surface irregularities on the wire's coating film decreases compared to the previous set time threshold. Then, at each set time threshold, gradually increase the tension of the coated wire by 2%-10% until the initial tension of the coated wire is reached.

[0021] The set time threshold is 30 to 120 seconds.

[0022] Furthermore, the specific method for controlling and adjusting the equipment operating parameters of the superconducting enameled wire production line is as follows: The coating speed is gradually reduced by 2%-10% every set time threshold until the number of pinholes or surface irregularities on the coating film decreases compared to the previous set time threshold. Then, the coating speed is gradually increased by 2%-10% every set time threshold until the initial coating speed is reached.

[0023] Principle: A servo motor with real-time feedback is used to reduce the speed of the coating wire, allowing the wire to remain in the coating mold / felt for a longer time. This gives the paint more time to "level" and "round" (the surface tension transforms the olive-shaped paint layer into a round shape), preventing paint film damage and uneven thickness. At high speeds, minute fluctuations in tension quickly translate into drastic changes in paint film thickness; at low speeds, this dynamic response is buffered, improving paint film uniformity.

[0024] Furthermore, the specific method for controlling and adjusting the equipment operating parameters of the superconducting enameled wire production line is as follows: Gradually increase the paint temperature by 5%-10% every set time threshold until the number of pinholes or surface bumps on the wire's paint film decreases compared to the previous set time threshold. Then, gradually decrease the paint temperature by 5%-10% every set time threshold until the initial paint temperature is restored.

[0025] Principle: The temperature of the paint directly affects its viscosity and surface tension, which in turn affects the paint film's ability to follow the movement of the substrate (wire) and its leveling ability. Gradually increasing the paint temperature appropriately can reduce the paint viscosity. Lower viscosity allows the paint film to flow and level more quickly after application, thus masking minor unevenness on the substrate surface caused by tension fluctuations and reducing the number of surface bumps. It also helps the solvent evaporate slowly, reducing the formation of pinholes due to the rupture of internal bubbles caused by tension fluctuations. If the temperature rises too quickly, the paint film surface will rapidly form a skin, preventing the internal solvent or gas from escaping. The minor deformations caused by tension fluctuations will be "frozen" in the paint film, resulting in unevenness. Sufficient time should be allowed for stress release and leveling of the paint film before it reaches its glass transition temperature; therefore, the paint temperature needs to be gradually increased.

[0026] A control system for a superconducting enameled wire production line, employing the aforementioned control method for a superconducting enameled wire production line; the control system includes a data acquisition module, a processing module, an instruction issuing module, and a storage module; The data acquisition module is used to collect coating data and testing data of the superconducting enameled wire production line when it is working. The processing module is used to determine in real time whether tension fluctuations occur in the coating data. If so, it controls the superconducting enameled wire production line to stop or adjusts the equipment operating parameters of the superconducting enameled wire production line; otherwise, the superconducting enameled wire production line continues to operate and generates control commands. The instruction sending module is used to send control instructions to the pay-off equipment, forming equipment, annealing equipment, coating equipment, testing equipment and / or winding equipment; The storage module is used to create and store processing files, which include incoming material number, processing time, equipment number, operator employee number, painting data, and testing data.

[0027] The beneficial effects of the present invention are as follows: The present invention provides a production line control method for superconducting enameled wires, which can dynamically monitor the tension fluctuation of the wire under the process requirements of superconducting wires under low tension, identify insignificant tension fluctuations, and thus control the production line to avoid affecting the quality of the enamel film, thereby stabilizing the tension of the enameled wire and suppressing the tension fluctuation rate. Attached Figure Description

[0028] The above and other features of the present invention will become more apparent from the detailed description of the embodiments shown in conjunction with the accompanying drawings. In the accompanying drawings, the same reference numerals denote the same or similar elements. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without any creative effort. In the drawings: Figure 1 The diagram shows a flowchart of a production line control method for superconducting enameled wire. Detailed Implementation

[0029] The following will provide a clear and complete description of the concept, specific structure, and technical effects of the present invention in conjunction with the embodiments and accompanying drawings, so as to fully understand the purpose, solution, and effects of the present invention. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0030] like Figure 1 The diagram shows a flowchart of a production line control method for superconducting enameled wire. The following section will discuss this method in conjunction with... Figure 1 This invention describes a production line control method for superconducting enameled wire according to an embodiment of the present invention, the method comprising the following steps: A production line control method for superconducting enameled wire is provided, which is applied to a superconducting enameled wire production line, wherein the superconducting enameled wire production line includes a wire feeding device, a forming device, an annealing device, a coating device, an inspection device, and a winding device arranged in sequence.

[0031] A method for controlling a production line of superconducting enameled wire, the method comprising the following steps: While working on the superconducting enameled wire production line, collect coating data and testing data of the superconducting enameled wire production line; The system can detect tension fluctuations in the coating data in real time. If so, it can control the superconducting enameled wire production line to stop or adjust the equipment operating parameters of the superconducting enameled wire production line; otherwise, the superconducting enameled wire production line continues to operate.

[0032] The coating data includes the tension of the coated wire, the speed of the coated wire, the temperature of the coating liquid, the ambient temperature of the coating environment, the baking temperature, the baking time, and the cross-sectional dimensions of the wire after each coating. The test data includes the cross-sectional dimensions of the finished wire, the number of pinholes, the location of the pinholes, the number of surface bumps and depressions, and the location of surface bumps and depressions. In the production line of superconducting enameled wires, especially during the high-temperature baking and curing process of the coating, fluctuations in tension can lead to thermal stress coupling, exacerbating the risk of coating film cracking or delamination. To avoid the aforementioned problems caused by tension fluctuations in the wire under the low tension required by superconducting wire materials, the specific method is as follows: Furthermore, the method for real-time determination of whether tension fluctuations occur in the paint coating data includes the following steps: The tension of the painted wire collected during the test period is arranged into a sequential dataset ZL according to the time of collection; the mean value of the tension of the painted wire in the sequential dataset ZL is denoted as the average tension. In the sequential dataset ZL, values ​​greater than the average tension are selected and recorded as strong tension values. Each strong tension value is judged in turn. If a strong tension value is less than the previous value PEAK in ZL, and PEAK is greater than the previous value PEAK in ZL, then these strong tension values ​​are marked as peak inflection points. In the sequential dataset ZL, values ​​less than the average tension are selected and recorded as weak tension values. Each weak tension value is judged in turn. If a weak tension value is greater than the previous value Valley in ZL, and Valley is less than the previous value Valley in ZL, then these weak tension values ​​are marked as valley inflection points. The maximum value among all peak inflection points is the peak maximum inflection point value; the minimum value among all valley inflection points is the valley minimum inflection point value. In the sequential dataset ZL, the time interval from the acquisition time of the peak maximum inflection point to the acquisition time of the value before the trough inflection point is denoted as the tension reduction period. In the sequential dataset ZL, the time interval from the acquisition time of the minimum inflection point of the trough to the acquisition time of the value before the peak inflection point is denoted as the tension increase period. If the number of pinholes or surface irregularities exceeds the set threshold during periods of decreased or increased tension, it is determined that tension fluctuation has occurred in the detection data.

[0033] Alternatively, if the number of pinholes or surface irregularities exceeds the number before the tension reduction period or the tension increase period after the tension reduction period, then the test data is judged to have experienced tension fluctuation.

[0034] In one embodiment of the present invention, the specific method for determining in real time whether tension fluctuations occur in the coating data includes: The tension of the painted wire collected during the test period is arranged into a sequential dataset ZL according to the time of collection; the mean value of the tension of the painted wire in the sequential dataset ZL is denoted as the average tension. In the sequential dataset ZL, values ​​greater than the average tension are selected and recorded as strong tension values. Each strong tension value is judged in turn. If a strong tension value is less than the previous value PEAK in ZL, and PEAK is greater than the previous value PEAK in ZL, then these strong tension values ​​are marked as peak inflection points. In the sequential dataset ZL, values ​​less than the average tension are selected and recorded as weak tension values. Each weak tension value is judged in turn. If a weak tension value is greater than the previous value Valley in ZL, and Valley is less than the previous value Valley in ZL, then these weak tension values ​​are marked as valley inflection points. The maximum value among all peak inflection points is the peak maximum inflection point value; the minimum value among all valley inflection points is the valley minimum inflection point value. The number of peak inflection points is recorded as the number of strong fluctuations; the number of trough inflection points is recorded as the number of weak fluctuations; the average value of each peak inflection point is used as the benchmark peak value; the sum of the differences between each peak inflection point greater than the benchmark peak value and the benchmark peak value is used as the fluctuation peak superposition value. The average of each valley inflection point is taken as the benchmark valley value; the sum of the differences between the benchmark valley value and each valley inflection point that is less than the benchmark valley value is taken as the fluctuation valley superposition value. If the number of strong fluctuations is greater than the number of weak fluctuations, and the maximum inflection point value of the wave peak is greater than or equal to the superposition value of the wave peaks, then it is determined that the detected data has experienced tension fluctuations. If the number of strong fluctuations is less than the number of weak fluctuations, and the sum of the fluctuation troughs is greater than or equal to the minimum inflection point value of the trough, then it is determined that the detected data has experienced tension fluctuations.

[0035] The wire feeding equipment receives circular wires, while the forming equipment extrudes these circular wires into flat wires or even smaller diameter circular wires, increasing their length. By obtaining the position of the joints between two adjacent superconducting wires, it is possible to determine whether the joint is located within the superconducting enameled wire production line and the specific process in which it occurs. Furthermore, by combining this information with assessments of abnormal processes, the control methods for the equipment operation of the superconducting enameled wire production line can be adjusted to minimize waste while ensuring the length of the superconducting wire.

[0036] Specifically, both the painting data and the test data have corresponding threshold ranges, which are the range between the minimum and maximum values.

[0037] It should be noted that when at least one of the process data exceeds the threshold range, indicating an abnormal process, the equipment or controller will issue an abnormal alarm, manually adjust the equipment operating parameters of the production line, and have the controller record the abnormal conductor length range.

[0038] The wire is an alloy superconducting material, and the alloy superconducting material is composed of niobium-based alloys (such as niobium-titanium alloys, niobium-zirconium alloys, etc.); preferably, the alloy superconducting material is a niobium-titanium alloy.

[0039] Furthermore, the wire specification is set at Φ1.500mm.

[0040] Furthermore, the winding device includes a winding spool and a laser detector. The laser detector is used for monitoring the position of the wire at the end of the spool, that is, detecting whether the wire has reached the end of the winding spool.

[0041] Furthermore, the length of the wire between the outlet end of the wire feeding device and the outlet end of the coating device is the online processing length, and the process in which the midpoint of the online processing length is located is the midpoint process; In one embodiment of the present invention, the method for controlling the shutdown of the superconducting enameled wire production line is as follows: when the coating data exceeds the threshold range, if two adjacent superconducting wire connectors are located at or after the midpoint process, the superconducting enameled wire production line is shut down; if two adjacent superconducting wire connectors are located before the midpoint process, the equipment operating parameters of the superconducting enameled wire production line are adjusted; if the process data does not recover to the threshold range after the two superconducting wire connectors have reached the midpoint process, the superconducting enameled wire production line is shut down.

[0042] In one embodiment of the present invention, the method for controlling and adjusting the equipment operating parameters of the superconducting enameled wire production line is specifically as follows: The tension of the coated wire is gradually reduced by 2% every set time threshold until the number of pinholes or surface irregularities on the wire's coating film decreases compared to the previous set time threshold. Then, the tension of the coated wire is gradually increased by 2% every set time threshold until the initial tension of the coated wire is reached.

[0043] The set time threshold is 30 seconds.

[0044] In one embodiment of the present invention, the method for controlling and adjusting the equipment operating parameters of the superconducting enameled wire production line is specifically as follows: The coating speed is gradually reduced by 2% every set time threshold until the number of pinholes or surface bumps on the coating film of the wire decreases compared to the previous set time threshold. Then, the coating speed is gradually increased by 2% every set time threshold until the initial coating speed is reached.

[0045] In one embodiment of the present invention, the method for controlling and adjusting the equipment operating parameters of the superconducting enameled wire production line is specifically as follows: The paint temperature is gradually increased by 5% every set time threshold until the number of pinholes or surface bumps on the wire's paint film decreases compared to the previous set time threshold. Then, the paint temperature is gradually decreased by 5% every set time threshold until the initial paint temperature is restored.

[0046] In one embodiment of the present invention, a production line control system for superconducting enameled wire is provided, which applies the above-described control method for a superconducting enameled wire production line; the control system includes a data acquisition module, a processing module, an instruction issuing module, and a storage module; The data acquisition module is used to collect coating data and testing data of the superconducting enameled wire production line when it is working. The processing module is used to determine in real time whether tension fluctuations occur in the coating data. If so, it controls the superconducting enameled wire production line to stop or adjusts the equipment operating parameters of the superconducting enameled wire production line; otherwise, the superconducting enameled wire production line continues to operate and generates control commands. The instruction sending module is used to send control instructions to the pay-off equipment, forming equipment, annealing equipment, coating equipment, testing equipment and / or winding equipment; The storage module is used to create and store processing files, which include incoming material number, processing time, equipment number, operator employee number, painting data, and testing data.

[0047] Specifically, the data acquisition module is used to implement the control methods of the superconducting enameled wire production line. The data acquisition module is connected to the wire feeding equipment, forming equipment, annealing equipment, coating equipment, testing equipment, and winding equipment. The data acquisition module, processing module, instruction issuing module, and storage module are interconnected to achieve data transmission.

[0048] Although the invention has been described in considerable detail and particularly with regard to several of the described embodiments, it is not intended to limit itself to any of these details or embodiments or any particular embodiment, thereby effectively covering the intended scope of the invention. Furthermore, the invention has been described above with respect to embodiments foreseeable by the inventors in order to provide a useful description, and non-substantial modifications to the invention that have not yet been foreseen may still represent equivalent modifications.

[0049] In the description of this specification, references to terms such as "embodiment," "example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0050] The contents not described in detail in this specification are common knowledge to those skilled in the art.

Claims

1. A production line control method for superconducting enameled wire, characterized in that, The method includes the following steps: While working on the superconducting enameled wire production line, collect coating data and testing data of the superconducting enameled wire production line; The system can detect tension fluctuations in the coating data in real time. If so, it can control the superconducting enameled wire production line to stop or adjust the equipment operating parameters of the superconducting enameled wire production line; otherwise, the superconducting enameled wire production line continues to operate.

2. The production line control method for superconducting enameled wire according to claim 1, characterized in that, The method for real-time determination of whether tension fluctuations occur in paint coating data includes the following steps: The tension of the painted wire collected during the test period is arranged into a sequential dataset ZL according to the time of collection; the mean value of the tension of the painted wire in the sequential dataset ZL is denoted as the average tension. In the sequential dataset ZL, values ​​greater than the average tension are selected and recorded as strong tension values. Each strong tension value is judged in turn. If a strong tension value is less than the previous value PEAK in ZL, and PEAK is greater than the previous value PEAK in ZL, then these strong tension values ​​are marked as peak inflection points. In the sequential dataset ZL, values ​​less than the average tension are selected and recorded as weak tension values. Each weak tension value is then evaluated sequentially. If a weak tension value is greater than its preceding value in ZL (Valley), and Valley is less than Valley's preceding value in ZL, these weak tension values ​​are marked as trough inflection points. The maximum value among the peak inflection points is recorded as the peak maximum inflection point value. The minimum value among the trough inflection points is recorded as the trough minimum inflection point value. The time interval from the acquisition time of the peak maximum inflection point value to the acquisition time of the preceding value in the sequential dataset ZL is recorded as the tension reduction period. In the sequential dataset ZL, the time interval from the acquisition time of the minimum inflection point of the trough to the acquisition time of the value before the peak inflection point is denoted as the tension increase period. If the number of pinholes or surface irregularities exceeds the number before the tension reduction or tension increase period, then the test data indicates that tension fluctuation has occurred.

3. The production line control method for superconducting enameled wire according to claim 2, characterized in that, The method for real-time determination of whether tension fluctuations occur in paint coating data will be replaced with: The tension of the painted wire collected during the test period is arranged into a sequential dataset ZL according to the time of collection; the mean value of the tension of the painted wire in the sequential dataset ZL is denoted as the average tension. In the sequential dataset ZL, values ​​greater than the average tension are selected and recorded as strong tension values; Each tensile strength value is judged sequentially. If a tensile strength value is less than the previous value PEAK in ZL, and PEAK is greater than the previous value PEAK in ZL, then these tensile strength values ​​are marked as peak inflection points. In the sequential dataset ZL, values ​​that are less than the average tension are selected and recorded as weak tension values; Each weak tension value is judged sequentially. If a weak tension value is greater than the previous value of the weak tension value in ZL (Valley) and the Valley is less than the previous value of the value Valley in ZL, then these weak tension values ​​are marked as valley inflection points. The maximum value among all peak inflection points is the peak maximum inflection point value; the minimum value among all valley inflection points is the valley minimum inflection point value. The number of peak inflection points is recorded as the number of strong fluctuations; the number of trough inflection points is recorded as the number of weak fluctuations; the average value of each peak inflection point is used as the benchmark peak value; the sum of the differences between each peak inflection point greater than the benchmark peak value and the benchmark peak value is used as the fluctuation peak superposition value. The average of the inflection points of each valley is used as the benchmark valley value; The sum of the differences between the benchmark valley value and the inflection points of all valley values ​​less than the benchmark valley value is the fluctuation valley superposition value; If the number of strong fluctuations is greater than the number of weak fluctuations, and the maximum inflection point value of the wave peak is greater than or equal to the superposition value of the wave peaks, then it is determined that the detected data has experienced tension fluctuations. If the number of strong fluctuations is less than the number of weak fluctuations, and the sum of the fluctuation troughs is greater than or equal to the minimum inflection point value of the trough, then it is determined that the detected data has experienced tension fluctuations.

4. The production line control method for superconducting enameled wire according to claim 1, characterized in that, The coating data includes the tension of the coated wire, the speed of the coated wire, the temperature of the coating liquid, the ambient temperature of the coating environment, the baking temperature, the baking time, and the cross-sectional dimensions of the wire after each coating. The test data includes the cross-sectional dimensions of the finished wire, the number of pinholes, the location of the pinholes, the number of surface bumps, and the location of surface bumps.

5. The production line control method for superconducting enameled wire according to claim 1, characterized in that, The specific method for controlling the shutdown of the superconducting enameled wire production line is as follows: when the coating data exceeds the threshold range, if two adjacent superconducting wire connectors are located at or after the midpoint process, the superconducting enameled wire production line is shut down; if two adjacent superconducting wire connectors are located before the midpoint process, the equipment operating parameters of the superconducting enameled wire production line are adjusted; if the process data does not return to the threshold range after the two superconducting wire connectors have reached the midpoint process, the superconducting enameled wire production line is shut down.

6. The production line control method for superconducting enameled wire according to claim 1, characterized in that, The specific method for controlling and adjusting the equipment operating parameters of the superconducting enameled wire production line is as follows: gradually reduce the tension of the enameled wire by 2%-10% every set time threshold until the number of pinholes or surface irregularities on the wire's enamel film decreases compared to the previous set time threshold. Then, gradually increase the tension of the enameled wire by 2%-10% every set time threshold until the initial tension of the enameled wire is reached.

7. The production line control method for superconducting enameled wire according to claim 6, characterized in that, The method for controlling and adjusting the equipment operating parameters of the superconducting enameled wire production line is replaced with: The coating speed is gradually reduced by 2%-10% every set time threshold until the number of pinholes or surface irregularities on the coating film decreases compared to the previous set time threshold. Then, the coating speed is gradually increased by 2%-10% every set time threshold until the initial coating speed is reached.

8. The production line control method for superconducting enameled wire according to claim 7, characterized in that, The method for controlling and adjusting the equipment operating parameters of the superconducting enameled wire production line is replaced with: Gradually increase the paint temperature by 5%-10% every set time threshold until the number of pinholes or surface bumps on the wire's paint film decreases compared to the previous set time threshold. Then, gradually decrease the paint temperature by 5%-10% every set time threshold until the initial paint temperature is restored.

9. A production line control system for superconducting enameled wire, characterized in that, A production line control method for superconducting enameled wire according to any one of claims 1 to 8; the control system includes a data acquisition module, a processing module, an instruction issuing module, and a storage module; The data acquisition module is used to collect coating data and testing data of the superconducting enameled wire production line when it is working. The processing module is used to determine in real time whether tension fluctuations occur in the coating data. If so, it controls the superconducting enameled wire production line to stop or adjusts the equipment operating parameters of the superconducting enameled wire production line; otherwise, the superconducting enameled wire production line continues to operate and generates control commands. The instruction sending module is used to send control instructions to the pay-off equipment, forming equipment, annealing equipment, coating equipment, testing equipment and / or winding equipment; The storage module is used to create and store processing files, which include incoming material number, processing time, equipment number, operator employee number, painting data, and testing data.

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