Intelligent control method for carbon fiber precursor production

Abstract

The invention relates to the technical field of carbon fiber detection, and discloses an intelligent control method for carbon fiber precursor production, comprising: obtaining fixed data of target carbon fibers, fixing carbon fibers to be detected, forming broken wire detection data, and adjusting the degree of fixation of the carbon fibers by a clamping module. The intelligent control method for carbon fiber precursor production simultaneously performs broken wire detection on a plurality of carbon fibers, determines whether the carbon fibers are loose according to the fixed positions of the carbon fibers during detection, and automatically adjusts the fixation of the carbon fibers, so that when broken wire detection is performed on a plurality of carbon fibers at the same time, the forces are balanced as much as possible, and according to the broken wire conditions of the carbon fibers, extracts data with similar or even consistent processes and results as much as possible, so that the data realization process reduces differences, thereby making the detection data results more accurate and reducing errors in data such as the use parameters of the actual object.

Description

Technical Field

[0001] The invention relates to the technical field of carbon fiber detection, and in particular to an intelligent control method for carbon fiber precursor production. Background Art

[0002] Carbon fiber is a high-performance material with the advantages of light weight, high strength, corrosion resistance, fatigue resistance, good electrical and thermal conductivity, etc. It is widely used in aerospace, automotive sports equipment, ships and other fields. Carbon fiber precursor is the basis of carbon fiber materials. Its quality and production efficiency directly affect the quality and production cost of carbon fiber products. Therefore, the development of a reliable and efficient carbon fiber precursor production line control system is crucial to the development of the carbon fiber industry. Traditional carbon fiber precursor detection methods mainly include visual inspection and manual measurement;

[0003] With the development of technology, more and more sensors are being used in detection. For example, artificial intelligence (AI) technology, especially machine learning and deep learning technology, has made significant progress in the field of fault detection and predictive maintenance in recent years. AI can process a large amount of data from sensors and extract useful information from them. Through training models, AI can identify normal and abnormal patterns, accurately detect broken wires, reduce dependence on manual inspections, and improve the accuracy and efficiency of detection. Modern AI-based broken wire detection systems usually include: data acquisition systems, data processing units, and alarm and reporting systems to process and analyze data in real time based on sensor data, issue alarms in a timely manner, and generate detection reports to help maintenance personnel make decisions;

[0004] The existing intelligent control method for carbon fiber precursor production cannot detect broken wires of multiple carbon fibers at the same time, and cannot judge whether the carbon fibers are loose based on the fixed position of the carbon fibers during detection, which makes the detection data inaccurate, and cannot adjust the fixing of the carbon fibers, so that when multiple carbon fibers are detected for broken wires at the same time, the force is uneven, which affects the accuracy of the detection data, and cannot extract data with similar or even consistent processes and results as much as possible based on the broken wire conditions of the carbon fibers, which makes the data realization process different, resulting in inaccurate results, and ultimately affecting the accuracy of data such as the actual usage parameters. Its practicality has certain limitations. Summary of the invention

[0005] The present invention provides an intelligent control method for producing carbon fiber precursor, which is used to promote solving the problems mentioned in the background technology.

[0006] The present invention provides the following technical solution: an intelligent control method for producing carbon fiber precursor, comprising:

[0007] Detection equipment: including acquisition module, clamping module, detection module and adjustment module;

[0008] Acquisition module: used to obtain fixed data of target carbon fiber;

[0009] Clamping module: comprising a first clamping plate and a second clamping plate, used to fix the carbon fiber to be tested;

[0010] Detection module: Through the broken wire detection strategy, the broken wire detection data is formed, and the tensile force corresponding to the broken wire of the carbon fiber is detected;

[0011] Adjustment module: adjust the degree of fixation of the clamping module on the carbon fiber being tested through equipment adjustment strategy;

[0012] The fixed data of the target carbon fiber is obtained as follows:

[0013] Obtain the center points of both ends of the target carbon fiber, which are respectively defined as the first center point and the second center point;

[0014] Connect the first center point and the second center point to form a long side line;

[0015] Obtain the plane where the first center point of the target carbon fiber is located, and define it as the determination surface;

[0016] Obtaining the profile of the determination surface of the target carbon fiber, which is defined as the determination profile;

[0017] Take the first center point as the origin and draw a straight line on the judgment surface as the judgment line;

[0018] Extract two intersection points of the determination line and the determination contour, and define them as the first intersection point and the second intersection point respectively;

[0019] Connect the first intersection point and the second intersection point to form a target straight line;

[0020] Get the length of the target straight line and set it as the target length.

[0021] As an intelligent control method for producing carbon fiber precursor according to the present invention, the broken wire detection strategy includes a fixed step, specifically:

[0022] Set the number of tests;

[0023] Respectively obtain the placement areas of the first clamp and the second clamp, and define them as the first target area and the second target area;

[0024] Obtaining a first sideline and a second sideline of a first splint;

[0025] Obtain fixed data of target carbon fiber;

[0026] Get the interval distance;

[0027] Set the placement distance;

[0028] After the target carbon fibers corresponding to the detected number are evenly placed in the first target area and the second target area according to the interval distance, the first clamping plate and the second clamping plate clamp the target carbon fibers;

[0029] Among them, the long sides of all target carbon fibers are parallel to the second side of the first plywood, the distance between the first center point of all target carbon fibers and the first side of the first plywood is the placement distance, and the long sides of all target carbon fibers are longer than the distance between the first plywood and the second plywood.

[0030] As an intelligent control method for producing carbon fiber precursor according to the present invention, the obtaining interval distance is specifically:

[0031] Obtaining a first edge line of a first splint;

[0032] Get the number of tests;

[0033] Get the length of the first edge line and set it as the judgment length;

[0034] Get the target length;

[0035] Set the starting distance;

[0036] Calculate the interval distance: interval distance = [(judgment length - 2 × starting distance) - (detection number × target length)] ÷ (detection number - 1).

[0037] As an intelligent control method for producing carbon fiber precursor according to the present invention, the broken wire detection strategy further includes a detection step, specifically:

[0038] The direction from the first clamping plate to the second clamping plate is identified as the target moving direction;

[0039] Get the number of tests;

[0040] Calculate the number of detections, number of detections = number of detections × 60%;

[0041] Obtaining the center points of the first splint and the second splint respectively, and setting them as the first analysis point and the second analysis point respectively;

[0042] connecting the first analysis point and the second analysis point to form an analysis center line;

[0043] Set the initial offset distance;

[0044] Taking the analysis center line as the starting position, the initial offset distance is offset to both sides thereof to form a first offset line and a second offset line;

[0045] The range between the first offset line and the second offset line is identified as the analysis range;

[0046] Obtain the number of target carbon fibers within the analysis range, which is defined as the analysis number;

[0047] If the number of analyses > the number of detections, reduce the initial offset distance until the number of analyses = the number of detections;

[0048] If the number of analyses is less than the number of detections, increase the initial offset distance until the number of analyses = the number of detections;

[0049] If the analysis quantity = the detection quantity, the equipment adjustment strategy is executed until it is determined that the clamping module is not loose;

[0050] The detection device controls the first clamping plate to be fixed;

[0051] The detection device controls the second clamping plate to move in the target moving direction until all target carbon fibers within the analysis range are broken;

[0052] The tension applied by the second splint was recorded.

[0053] As an intelligent control method for producing carbon fiber precursor according to the present invention, the equipment adjustment strategy is specifically as follows:

[0054] Set the initial clamping force;

[0055] Set fixed clamping force;

[0056] The detection device controls the first clamping plate to clamp one side of the target carbon fiber with a fixed clamping force;

[0057] The detection device controls the second clamping plate to clamp the other side of the target carbon fiber with an initial clamping force;

[0058] Get the initial intersection point and the moving intersection point;

[0059] If the moving intersection point = the initial intersection point, it is determined that the target carbon fiber has been clamped;

[0060] If the moving intersection point ≠ the initial intersection point, it is determined that the target carbon fiber is not clamped;

[0061] Get the number of tests;

[0062] The number of clamped target carbon fibers is obtained and is defined as the clamping number;

[0063] If the clamping quantity ≠ the detection quantity, the clamping adjustment strategy is executed until the clamping quantity = the detection quantity;

[0064] If the clamping quantity = the detection quantity, the looseness determination strategy is executed.

[0065] As an intelligent control method for producing carbon fiber precursor according to the present invention, the obtaining of the initial intersection point and the moving intersection point is specifically as follows:

[0066] Obtaining the third side line of the second splint;

[0067] For each target carbon fiber, the intersection point with the third edge line is extracted and determined as the initial intersection point;

[0068] Set the unit distance;

[0069] The detection device controls the second clamping plate to move a unit distance in the target moving direction;

[0070] The intersection points of each target carbon fiber with the third edge line are extracted again and are defined as moving intersection points.

[0071] As an intelligent control method for producing carbon fiber precursor according to the present invention, the clamping adjustment strategy is specifically as follows:

[0072] Set the unit clamping force;

[0073] Obtaining fixed clamping force and initial clamping force;

[0074] Calculate and adjust the clamping force, adjusted clamping force = initial clamping force + unit clamping force;

[0075] The detection device controls the first clamping plate to clamp one side of the target carbon fiber with a fixed clamping force;

[0076] The detection device controls the second clamping plate to adjust the clamping force to clamp the other side of the target carbon fiber;

[0077] Get the initial intersection point and the moving intersection point;

[0078] Get the detection quantity and clamping quantity;

[0079] If the clamping quantity ≠ the detection quantity, the adjusted clamping force is updated to the initial clamping force, and the clamping adjustment strategy is repeatedly executed until the clamping quantity = the detection quantity;

[0080] If the clamping quantity = the detection quantity, the looseness determination strategy is executed.

[0081] As an intelligent control method for producing carbon fiber precursor according to the present invention, the looseness determination strategy is specifically as follows:

[0082] The adjustment module includes a wind control device;

[0083] S1. The midpoint of the long side line is determined as the determination midpoint;

[0084] For each target carbon fiber, the vertical distance between the determination midpoint and the analysis midline is obtained and defined as the initial distance;

[0085] S2, set the initial wind speed;

[0086] S3, the wind control device outputs wind force to the target carbon fiber with the initial wind force;

[0087] S4, again obtaining the vertical distance between the determination midpoint and the analysis midline for each target carbon fiber, and setting it as the moving distance;

[0088] S5. If the moving distance = the initial distance, obtain the unit wind force;

[0089] If the moving distance ≠ the initial distance, the loose adjustment strategy is executed;

[0090] S6. Calculate the adjusted wind force, where the adjusted wind force = initial wind force + unit wind force;

[0091] S7, a wind control device to adjust the wind force to output the wind force to the target carbon fiber;

[0092] S8, obtaining the ultimate wind force;

[0093] S9. If the adjusted wind force = the limit wind force, it is determined that the clamping module is not loose;

[0094] If the adjusted wind force ≠ the limit wind force, steps S4-S9 are repeated until the adjusted wind force = the limit wind force.

[0095] As an intelligent control method for producing carbon fiber precursor according to the present invention, the loose adjustment strategy is specifically:

[0096] Obtain the adjusted clamping force, fixed clamping force and unit clamping force;

[0097] Calculate the wind holding force, wind holding force = adjusted holding force + unit holding force;

[0098] The detection device controls the first clamping plate to clamp one side of the target carbon fiber with a fixed clamping force;

[0099] The detection device controls the second clamping plate to clamp the other side of the target carbon fiber with a wind clamping force;

[0100] Execute steps S1-S4;

[0101] If the moving distance ≠ the initial distance, the wind clamping force is updated to the adjustment clamping force, and the loosening adjustment strategy is repeated until the moving distance = the initial distance;

[0102] If the moving distance = the initial distance, the unit wind force is obtained and steps S6-S9 are executed.

[0103] The present invention has the following beneficial effects:

[0104] 1. The intelligent control method for producing carbon fiber precursor is used to detect broken fibers of multiple carbon fibers at the same time. By obtaining the position of each carbon fiber on the clamping plate, the first clamping plate clamps one end of the carbon fiber to keep it fixed, and the second clamping plate clamps the other end of the carbon fiber to move. If the position marked between the carbon fiber and the third edge line changes, it means that there is sliding between the second clamping plate and the carbon fiber, which means that the second clamping plate does not clamp the carbon fiber. At this time, the clamping force of the second clamping plate is automatically adjusted to clamp the carbon fiber, so that the detected data is more accurate and the error of data such as the actual use parameters is reduced.

[0105] 2. The intelligent control method for the production of carbon fiber precursor determines whether the carbon fiber is shaking by controlling the wind force blowing the carbon fiber. If the distance between the judgment midpoint and the analysis midline of the carbon fiber changes in the presence of wind, it means that the carbon fiber is not clamped. At this time, there will be a certain error in the detected data. The clamping force of the second clamping plate on the carbon fiber is automatically adjusted until all the detected carbon fibers are clamped. When multiple carbon fibers are detected for broken wires at the same time, the force is as balanced as possible, thereby making the detected data more accurate and reducing the error of data such as the actual usage parameters.

[0106] 3. The intelligent control method for the production of carbon fiber precursor determines the number of detections when all detected carbon fibers are clamped. When the carbon fibers are laid flat and stretched at the same time, they are affected by the environment and tension, so that the force on each carbon fiber is different. Therefore, a partial area distributed in the middle is selected as the analysis range to ensure that there are carbon fibers on both sides of each carbon fiber in the analysis range, so that each carbon fiber is basically subjected to the same wind force when the wind blows. The second clamping plate is used to move in the target moving direction until all target carbon fibers in the analysis range are broken. At this time, the tension used by the second clamping plate is recorded. According to the broken wire situation of the carbon fiber, data with similar or even consistent processes and results are extracted as much as possible, so that the data realization process reduces differences, thereby making the results more accurate and reducing errors in data such as the actual usage parameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0107] Figure 1 This is a block diagram of the intelligent control method for producing carbon fiber precursor of the present invention;

[0108] Figure 2 It is a schematic diagram of the detection device of the present invention;

[0109] Figure 3 It is a schematic diagram of the first target area and the second target area of ​​the present invention. DETAILED DESCRIPTION

[0110] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0111] Embodiment 1, an intelligent control method for producing carbon fiber precursor, see Figure 1-Figure 3 ,include:

[0112] Detection equipment: including acquisition module, clamping module, detection module and adjustment module;

[0113] Acquisition module: used to obtain fixed data of target carbon fiber;

[0114] Clamping module: including a first clamping plate and a second clamping plate, used to fix the carbon fiber to be tested, such as Figure 2 As shown;

[0115] Detection module: Through the broken wire detection strategy, the broken wire detection data is formed, and the tensile force corresponding to the broken wire of the carbon fiber is detected;

[0116] Adjustment module: adjust the degree of fixation of the clamping module on the carbon fiber being tested through equipment adjustment strategy;

[0117] The fixed data of the target carbon fiber is obtained as follows:

[0118] Obtain the center points of both ends of the target carbon fiber and set them as the first center point and the second center point respectively. Figure 2 As shown;

[0119] Connect the first center point and the second center point to form a long side line, such as Figure 3 As shown;

[0120] Get the plane where the first center point of the target carbon fiber is located and set it as the judgment surface, such as Figure 2 As shown;

[0121] The contour of the determination surface of the target carbon fiber is obtained and is defined as the determination contour, such as Figure 2 As shown;

[0122] Take the first center point as the origin and draw a straight line on the judgment surface as the judgment line;

[0123] Extract the two intersection points of the judgment line and the judgment contour, and define them as the first intersection point and the second intersection point respectively, such as Figure 2 As shown;

[0124] Connect the first intersection point and the second intersection point to form a target straight line, such as Figure 2 As shown;

[0125] Get the length of the target straight line and set it as the target length.

[0126] Through the above module, multiple carbon fibers are detected for broken wires at the same time. According to the fixed position of the carbon fibers during detection, it is judged whether the carbon fibers are loose, so that the detected data is more accurate, and the fixing of the carbon fibers is automatically adjusted so that when multiple carbon fibers are detected for broken wires at the same time, the forces are balanced as much as possible, so that the detected data is more accurate. According to the broken wire situation of the carbon fibers, data with similar or even consistent processes and results are extracted as much as possible, so that the data realization process reduces the difference, so that the results are more accurate and the errors of data such as the use parameters of the actual objects are reduced;

[0127] Among them, to determine whether the carbon fiber is loose, the fixed position and fixation of the carbon fiber are captured by AI visual detection technology, and a model is generated. According to the specific detection process, the position points that need to be analyzed are marked in the image, and the target detection algorithm is optimized based on YOLO. The feature picture set of the carbon fiber position is collected, and the corresponding detection method and adjustment method are established, and the method is embedded in the edge AI computing device;

[0128] Among them, the YOLO-MODO (carbon fiber state event detection model) detection mechanism sets up the camera at a fixed position in the target detection area, collects the video stream files of the state events of the carbon fiber fibers in the first target area and the second target area as the original data set, manually annotates the state event data set, and uses the annotation results for the training of the YOLO-MODO detection model to obtain the basic version of the model. Combined with the TensorRT optimizer, the model reasoning acceleration is completed, and the RTSP protocol video stream is connected to detect the state events using the YOLO-MODO detection method to determine in real time whether the state events occur. If a change in the position of the carbon fiber fibers is detected, that is, the second splint does not clamp the carbon fiber fibers, the clamping force of the second splint is adjusted, and the detection video and state event images are saved to the specified storage location for later model iteration. The saved detection video and state event images may have false alarm or missed alarm problems. The stored data set is regularly matched with the scene ledger records based on temporal features to find false alarm or missed alarm video data sets for continuous iterative learning of the model, and the optimized detection model is updated to the detection terminal device;

[0129] The camera RTSP protocol video stream is connected to the edge AI computing device. When the device is powered on, it automatically executes the model detection script and starts detection. If a change in the position of the carbon fiber wire is detected, that is, the second plywood does not clamp the carbon fiber wire, the clamping force of the second plywood is adjusted. The detection model continues to run until no state events are detected and the position of the carbon fiber wire has not changed. The second plywood is controlled to move until the carbon fiber wire breaks, and relevant data is recorded. The model is kept running continuously throughout the whole process. In order to ensure the continuity of the script operation and prevent interruptions in the execution process, a model detection script daemon is added. When the model operation cannot be detected, the startup program is triggered to ensure the stability of the detection model operation.

[0130] Embodiment 2: This embodiment is an improvement made on the basis of embodiment 1. The intelligent control method for producing carbon fiber precursor is as follows: Figure 3 The broken wire detection strategy includes fixed steps, specifically:

[0131] Set the number of tests, which is 5;

[0132] The placement areas of the first splint and the second splint are obtained respectively and defined as the first target area and the second target area, such as Figure 3 As shown;

[0133] Get the first edge line and the second edge line of the first splint, such as Figure 3 As shown;

[0134] Obtain fixed data of target carbon fiber;

[0135] Get the interval distance;

[0136] Set the placement distance, the placement distance is 2 cm;

[0137] After the target carbon fibers corresponding to the detected number are evenly placed in the first target area and the second target area according to the interval distance, the first clamping plate and the second clamping plate clamp the target carbon fibers, such as Figure 3 As shown;

[0138] Among them, the long sides of all target carbon fibers are parallel to the second side of the first plywood, the distance between the first center point of all target carbon fibers and the first side of the first plywood is the placement distance, and the long sides of all target carbon fibers are longer than the distance between the first plywood and the second plywood. Figure 3 shown.

[0139] The acquisition interval distance is specifically:

[0140] Get the first edge of the first splint, such as Figure 3 As shown;

[0141] Get the number of tests;

[0142] Get the length of the first edge line and set it as the judgment length;

[0143] Get the target length, such as Figure 3 As shown;

[0144] Set a starting distance, which is the distance between the outermost target carbon fiber and the second edge line of the first splint, such as the starting distance is 1 cm. Figure 3 As shown;

[0145] Calculate the interval distance, interval distance = [(determination length - 2 × starting distance) - (detection number × target length)] ÷ (detection number - 1), such as Figure 3 shown.

[0146] This embodiment also provides that the broken wire detection strategy further includes a detection step, specifically:

[0147] The direction from the first clamping plate to the second clamping plate is identified as the target moving direction;

[0148] Get the number of tests;

[0149] Calculate the number of detections, number of detections = number of detections × 60%;

[0150] The center points of the first splint and the second splint are obtained respectively and are defined as the first analysis point and the second analysis point respectively, such as Figure 3 As shown;

[0151] Connect the first analysis point and the second analysis point to form the analysis center line, such as Figure 3 As shown;

[0152] Setting an initial offset distance, wherein the initial offset distance is 0.5 cm;

[0153] Taking the analysis center line as the starting position, the initial offset distance is offset to both sides to form the first offset line and the second offset line, such as Figure 3 As shown;

[0154] The range between the first offset line and the second offset line is identified as the analysis range;

[0155] Obtain the number of target carbon fibers within the analysis range, which is defined as the analysis number;

[0156] If the number of analyses > the number of detections, reduce the initial offset distance until the number of analyses = the number of detections;

[0157] If the number of analyses is less than the number of detections, increase the initial offset distance until the number of analyses = the number of detections;

[0158] If the analysis quantity = the detection quantity, the equipment adjustment strategy is executed until it is determined that the clamping module is not loose;

[0159] The detection device controls the first clamping plate to be fixed;

[0160] The detection device controls the second clamping plate to move in the target moving direction until all target carbon fibers within the analysis range are broken;

[0161] The tension applied by the second splint was recorded.

[0162] Embodiment 3: This embodiment is an improvement made on the basis of Embodiment 2. In this embodiment, the device adjustment strategy is specifically as follows:

[0163] Setting an initial clamping force, wherein the initial clamping force is a manually set default clamping force, such as an initial clamping force of 5N;

[0164] Set a fixed clamping force, where the fixed clamping force is the maximum clamping force of the device, such as a fixed clamping force of 10N;

[0165] The detection device controls the first clamping plate to clamp one side of the target carbon fiber with a fixed clamping force;

[0166] The detection device controls the second clamping plate to clamp the other side of the target carbon fiber with an initial clamping force;

[0167] Get the initial intersection point and the moving intersection point;

[0168] If the moving intersection point = the initial intersection point, it is determined that the target carbon fiber has been clamped;

[0169] If the moving intersection point ≠ the initial intersection point, it is determined that the target carbon fiber is not clamped;

[0170] Get the number of tests;

[0171] The number of clamped target carbon fibers is obtained and is defined as the clamping number;

[0172] If the clamping quantity ≠ the detection quantity, the clamping adjustment strategy is executed until the clamping quantity = the detection quantity;

[0173] If the clamping quantity = the detection quantity, the looseness determination strategy is executed.

[0174] The obtaining of the initial intersection point and the moving intersection point is specifically as follows:

[0175] Obtaining the third side line of the second splint;

[0176] For each target carbon fiber, extract its intersection with the third edge line and set it as the initial intersection point, such as Figure 3 As shown;

[0177] Set a unit distance, where the unit distance is 1 mm;

[0178] The detection device controls the second clamping plate to move a unit distance in the target moving direction;

[0179] Again, extract the intersection point between each target carbon fiber and the third edge line and define it as the moving intersection point, such as Figure 3 shown.

[0180] This embodiment also provides that the clamping adjustment strategy is specifically:

[0181] Set the unit clamping force, the unit clamping force is 1N;

[0182] Obtaining fixed clamping force and initial clamping force;

[0183] Calculate and adjust the clamping force, adjusted clamping force = initial clamping force + unit clamping force;

[0184] The detection device controls the first clamping plate to clamp one side of the target carbon fiber with a fixed clamping force;

[0185] The detection device controls the second clamping plate to adjust the clamping force to clamp the other side of the target carbon fiber;

[0186] Get the initial intersection point and the moving intersection point;

[0187] Get the detection quantity and clamping quantity;

[0188] If the clamping quantity ≠ the detection quantity, the adjusted clamping force is updated to the initial clamping force, and the clamping adjustment strategy is repeatedly executed until the clamping quantity = the detection quantity;

[0189] If the clamping quantity = the detection quantity, the looseness determination strategy is executed.

[0190] This embodiment also provides that the looseness determination strategy is specifically:

[0191] The adjustment module includes a wind control device;

[0192] S1. Set the midpoint of the long side line as the determination midpoint, such as Figure 3 As shown;

[0193] For each target carbon fiber, the vertical distance between the determination midpoint and the analysis midline is obtained and defined as the initial distance, such as Figure 3 As shown;

[0194] S2. Setting an initial wind force, wherein the initial wind force is the minimum wind force that can be output by the wind control device;

[0195] S3, the wind control device outputs wind force to the target carbon fiber with the initial wind force;

[0196] S4. For each target carbon fiber, the vertical distance between the determination midpoint and the analysis midline is obtained again, and is defined as the moving distance. Figure 3 As shown;

[0197] S5. If the moving distance = the initial distance, obtain the unit wind force, where the unit wind force is the wind direction remains unchanged and the wind speed is 1;

[0198] If the moving distance ≠ the initial distance, the loose adjustment strategy is executed;

[0199] S6. Calculate the adjusted wind force, where the adjusted wind force = initial wind force + unit wind force;

[0200] S7, a wind control device to adjust the wind force to output the wind force to the target carbon fiber;

[0201] S8, obtaining a limit wind force, where the limit wind force is the maximum wind force that can be output by the wind control device;

[0202] S9. If the adjusted wind force = the limit wind force, it is determined that the clamping module is not loose;

[0203] If the adjusted wind force ≠ the limit wind force, steps S4-S9 are repeated until the adjusted wind force = the limit wind force.

[0204] The loose adjustment strategy is specifically as follows:

[0205] Obtain the adjusted clamping force, fixed clamping force and unit clamping force;

[0206] Calculate the wind holding force, wind holding force = adjusted holding force + unit holding force;

[0207] The detection device controls the first clamping plate to clamp one side of the target carbon fiber with a fixed clamping force;

[0208] The detection device controls the second clamping plate to clamp the other side of the target carbon fiber with a wind clamping force;

[0209] Execute steps S1-S4;

[0210] If the moving distance ≠ the initial distance, the wind clamping force is updated to the adjustment clamping force, and the loosening adjustment strategy is repeated until the moving distance = the initial distance;

[0211] If the moving distance = the initial distance, the unit wind force is obtained and steps S6-S9 are executed.

[0212] In this embodiment, multiple carbon fibers are detected for broken wires at the same time, and whether the carbon fibers are loose is determined based on the fixed positions of the carbon fibers during detection, thereby making the detected data more accurate, and automatically adjusting the fixing conditions of the carbon fibers so that when multiple carbon fibers are detected for broken wires at the same time, the forces are as balanced as possible, thereby making the detected data more accurate, and according to the broken wire conditions of the carbon fibers, data with similar or even consistent processes and results are extracted as much as possible, so that the differences in the data realization process are reduced, thereby making the results more accurate and reducing the errors in data such as the usage parameters of the actual object.

[0213] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0214] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An intelligent control method for producing carbon fiber precursor, characterized in that: include: Detection equipment: including acquisition module, clamping module, detection module and adjustment module; Acquisition module: used to obtain fixed data of target carbon fiber; Clamping module: comprising a first clamping plate and a second clamping plate, used to fix the carbon fiber to be tested; Detection module: Through the broken wire detection strategy, the broken wire detection data is formed, and the tensile force corresponding to the broken wire of the carbon fiber is detected; Adjustment module: adjust the degree of fixation of the clamping module on the carbon fiber being tested through equipment adjustment strategy; The fixed data of the target carbon fiber is obtained as follows: Obtain the center points of both ends of the target carbon fiber, which are respectively defined as the first center point and the second center point; Connect the first center point and the second center point to form a long side line; Obtain the plane where the first center point of the target carbon fiber is located, and define it as the determination surface; Obtaining the profile of the determination surface of the target carbon fiber, which is defined as the determination profile; Take the first center point as the origin and draw a straight line on the judgment surface as the judgment line; Extract two intersection points of the determination line and the determination contour, and define them as the first intersection point and the second intersection point respectively; Connect the first intersection point and the second intersection point to form a target straight line; Get the length of the target straight line and set it as the target length.

2. The intelligent control method for producing carbon fiber precursor according to claim 1, characterized in that: The broken wire detection strategy includes fixed steps, specifically: Set the number of tests; Respectively obtain the placement areas of the first clamp and the second clamp, and define them as the first target area and the second target area; Obtaining a first sideline and a second sideline of a first splint; Obtain fixed data of target carbon fiber; Get the interval distance; Set the placement distance; After the target carbon fibers corresponding to the detected number are evenly placed in the first target area and the second target area according to the interval distance, the first clamping plate and the second clamping plate clamp the target carbon fibers; Among them, the long sides of all target carbon fibers are parallel to the second side of the first plywood, the distance between the first center point of all target carbon fibers and the first side of the first plywood is the placement distance, and the long sides of all target carbon fibers are longer than the distance between the first plywood and the second plywood.

3. The intelligent control method for producing carbon fiber precursor according to claim 2, characterized in that: The obtaining interval distance is specifically: Obtaining a first edge line of a first splint; Get the number of tests; Get the length of the first edge line and set it as the judgment length; Get the target length; Set the starting distance; Calculate the interval distance: interval distance = [(judgment length - 2 × starting distance) - (detection number × target length)] ÷ (detection number - 1).

4. The intelligent control method for producing carbon fiber precursor according to claim 2, characterized in that: The broken wire detection strategy also includes a detection step, specifically: The direction from the first clamping plate to the second clamping plate is identified as the target moving direction; Get the number of tests; Calculate the number of detections, number of detections = number of detections × 60%; Obtaining the center points of the first clamping plate and the second clamping plate respectively, and setting them as the first analysis point and the second analysis point respectively; connecting the first analysis point and the second analysis point to form an analysis center line; Set the initial offset distance; Taking the analysis center line as the starting position, the initial offset distance is offset to both sides thereof to form a first offset line and a second offset line; The range between the first offset line and the second offset line is identified as the analysis range; Obtain the number of target carbon fibers within the analysis range, which is defined as the analysis number; If the number of analyses > the number of detections, reduce the initial offset distance until the number of analyses = the number of detections; If the number of analyses is less than the number of detections, increase the initial offset distance until the number of analyses = the number of detections; If the analysis quantity = the detection quantity, the equipment adjustment strategy is executed until it is determined that the clamping module is not loose; The detection device controls the first clamping plate to be fixed; The detection device controls the second clamping plate to move in the target moving direction until all target carbon fibers within the analysis range are broken; The tension applied by the second splint was recorded.

5. The intelligent control method for producing carbon fiber precursor according to claim 4, characterized in that: The device adjustment strategy is specifically: Set the initial clamping force; Set fixed clamping force; The detection device controls the first clamping plate to clamp one side of the target carbon fiber with a fixed clamping force; The detection device controls the second clamping plate to clamp the other side of the target carbon fiber with an initial clamping force; Get the initial intersection point and the moving intersection point; If the moving intersection point = the initial intersection point, it is determined that the target carbon fiber has been clamped; If the moving intersection point ≠ the initial intersection point, it is determined that the target carbon fiber is not clamped; Get the number of tests; The number of clamped target carbon fibers is obtained and is defined as the clamping number; If the clamping quantity ≠ the detection quantity, the clamping adjustment strategy is executed until the clamping quantity = the detection quantity; If the clamping quantity = the detection quantity, the looseness determination strategy is executed.

6. The intelligent control method for producing carbon fiber precursor according to claim 5, characterized in that: The obtaining of the initial intersection point and the moving intersection point is specifically as follows: Obtaining the third side line of the second splint; For each target carbon fiber, the intersection point with the third edge line is extracted and determined as the initial intersection point; Set the unit distance; The detection device controls the second clamping plate to move a unit distance in the target moving direction; The intersection points of each target carbon fiber with the third edge line are extracted again and are defined as moving intersection points.

7. The intelligent control method for producing carbon fiber precursor according to claim 5, characterized in that: The clamping adjustment strategy is specifically as follows: Set the unit clamping force; Obtaining fixed clamping force and initial clamping force; Calculate and adjust the clamping force, adjusted clamping force = initial clamping force + unit clamping force; The detection device controls the first clamping plate to clamp one side of the target carbon fiber with a fixed clamping force; The detection device controls the second clamping plate to adjust the clamping force to clamp the other side of the target carbon fiber; Get the initial intersection point and the moving intersection point; Get the detection quantity and clamping quantity; If the clamping quantity ≠ the detection quantity, the adjusted clamping force is updated to the initial clamping force, and the clamping adjustment strategy is repeatedly executed until the clamping quantity = the detection quantity; If the clamping quantity = the detection quantity, the looseness determination strategy is executed.

8. The intelligent control method for producing carbon fiber precursor according to claim 7, characterized in that: The looseness determination strategy is specifically as follows: The adjustment module includes a wind control device; S1. The midpoint of the long side line is determined as the determination midpoint; For each target carbon fiber, the vertical distance between the determination midpoint and the analysis midline is obtained and defined as the initial distance; S2, set the initial wind force; S3, the wind control device outputs wind force to the target carbon fiber with the initial wind force; S4, again obtaining the vertical distance between the determination midpoint and the analysis midline for each target carbon fiber, and setting it as the moving distance; S5. If the moving distance = the initial distance, obtain the unit wind force; If the moving distance ≠ the initial distance, the loose adjustment strategy is executed; S6. Calculate the adjusted wind force, where the adjusted wind force = initial wind force + unit wind force; S7, a wind control device to adjust the wind force to output the wind force to the target carbon fiber; S8, obtaining the ultimate wind force; S9. If the adjusted wind force = the limit wind force, it is determined that the clamping module is not loose; If the adjusted wind force ≠ the limit wind force, steps S4-S9 are repeated until the adjusted wind force = the limit wind force.

9. The intelligent control method for producing carbon fiber precursor according to claim 8, characterized in that: The loose adjustment strategy is specifically as follows: Obtain the adjusted clamping force, fixed clamping force and unit clamping force; Calculate the wind holding force, wind holding force = adjusted holding force + unit holding force; The detection device controls the first clamping plate to clamp one side of the target carbon fiber with a fixed clamping force; The detection device controls the second clamping plate to clamp the other side of the target carbon fiber with a wind clamping force; Execute steps S1-S4; If the moving distance ≠ the initial distance, the wind clamping force is updated to the adjustment clamping force, and the loosening adjustment strategy is repeated until the moving distance = the initial distance; If the moving distance = the initial distance, the unit wind force is obtained and steps S6-S9 are executed.

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