Electronic yarn guide device winding fault detection method

Abstract

The application discloses a winding fault detection method of an electronic yarn guide device and belongs to the technical field of electronic yarn guide device fault detection. The winding speed of a winding motor is obtained by analyzing production requirements. The yarn drum diameter is calculated based on the winding speed and the yarn guide motor speed. The yarn drum diameter is detected in real time. When it is detected that the yarn drum diameter no longer changes or becomes smaller in a certain time period, winding fault may occur. The time period is further analyzed. The deviation angle between the yarn between the yarn guide and the yarn drum and the horizontal plane where the yarn guide is located is detected. If the deviation angle deviates from the normal range, it can be judged that the electronic yarn guide device has winding fault. The scheme can realize winding fault detection based on the detection data of the sensor of the electronic yarn guide device itself without increasing detection sensors, thereby greatly reducing detection cost.

Description

Technical Field

[0001] This invention relates to the field of fault detection technology for electronic yarn guide devices, and more specifically, to a method for detecting winding faults in electronic yarn guide devices. Background Technology

[0002] The yarn bobbin (also known as doffing) is the first step in the pre-weaving preparation process. The primary task of the yarn bobbin process is to connect the bobbins (or skeins) into a large-capacity bobbin for warping, winding, twisting, weft winding, and dyeing. It can also serve as a weft bobbin for shuttleless looms and a bobbin for knitting. During the yarn guiding process, there is a very low probability of a winding failure, where the yarn does not wind onto the bobbin but instead winds onto the connecting rod that connects the winding motor to the bobbin. In this case, the winding motor is very likely to jam, causing a malfunction of the entire electronic yarn guiding device. Currently, the method for detecting this failure is to install a detection sensor on the connecting rod at each spindle position to detect whether the yarn is winding onto the connecting rod. However, this solution requires an additional detection sensor for each spindle position, and an electronic yarn guiding device has a large number of spindles; installing a detection sensor on each spindle position is expensive and costly.

[0003] Chinese Patent, Publication No. CN110004573A, Publication Date: July 12, 2019, discloses a yarn fault detection method and device based on vibration data. The method includes: allowing the yarn to be tested to pass through an elastic body during movement; determining the fault state of the yarn to be tested using the vibration data of the elastic body; firstly, collecting training vibration data, grouping it using a sliding window method, extracting training feature vectors for each group, and training a machine learning classifier using the training dataset composed of training feature vectors with fault state labels; then determining the fault state of the yarn to be tested using the detected vibration data and the trained machine learning classifier. However, this method uses a large number of sensors for fault detection, making it impossible to perform fault detection based on the sensors built into the electronic yarn guide device itself, resulting in high detection costs. Summary of the Invention

[0004] This invention addresses the high cost of detecting winding faults in existing electronic yarn guide devices, which require additional detection equipment. It proposes a method for detecting winding faults in electronic yarn guide devices. By analyzing production requirements, the winding speed of the winding motor is obtained. Based on the winding speed and the guiding speed of the yarn guide motor, the yarn bobbin diameter is calculated. Real-time monitoring of the yarn bobbin diameter reveals that a winding fault may have occurred if the diameter stops changing or decreases within a certain time period. Further analysis of this time period detects the deviation angle between the yarn and the horizontal plane where the yarn guide is located. If the deviation angle deviates from the normal range, a winding fault in the electronic yarn guide device can be identified. This solution can detect winding faults using data from the sensors built into the electronic yarn guide device itself without adding additional detection sensors, significantly reducing detection costs.

[0005] In a first aspect, one technical solution provided in this embodiment of the invention is: a method for detecting winding faults in an electronic yarn guiding device, applicable to an electronic yarn guiding device, wherein the electronic yarn guiding device includes: A winding motor is used to wind yarn to form a yarn bobbin; A yarn guide makes a periodic reciprocating motion to accurately guide the yarn into the yarn bobbin; A yarn guide motor is used to transport yarn to the yarn guide. A single-spindle control system is used to control the corresponding electronic yarn guiding device according to the spindle position code; Includes the following steps: S1. Obtain the product parameters of the yarn bobbin based on production needs, and obtain the winding speed of the winding motor and the motion cycle of the yarn guide based on the product parameters. S2. Detect the yarn transmission speed and obtain the yarn bobbin diameter based on the transmission speed, the motion cycle of the yarn guide and the winding speed. S3. Collect the yarn bobbin diameter at the same time interval T and construct the yarn bobbin diameter change region in the time domain; divide the yarn bobbin diameter change region based on the collection points to obtain the segmented sub-regions, and obtain the yarn bobbin diameter difference collected by the collection points at the upper and lower boundaries of each segmented sub-region. If the difference is less than or equal to 0, the segmented sub-region is taken as the target segmented sub-region. S4. Detect the deviation angle between the yarn between the yarn guide and the yarn bobbin and the horizontal plane where the yarn guide is located in the target segmented sub-region. If the deviation angle is less than or equal to the preset threshold, it is determined that a winding fault has occurred, and an alarm signal is sent.

[0006] In this solution, to detect winding faults using the built-in sensors of the electronic yarn guide device, the winding speed of the winding motor in the electronic yarn guide device is obtained by determining the production requirements before the yarn bobbin is produced. By analyzing the winding speed and the yarn transmission speed, the distance between the yarn and the center of the yarn bobbin at each moment can be obtained. Then, by analyzing the distance between the yarn and the center of the yarn bobbin at each moment based on the movement cycle of the yarn guide, the diameter of the yarn bobbin can be obtained. Since the diameter of the yarn bobbin inevitably increases over time during the winding process, if a winding fault occurs, the diameter of the yarn bobbin calculated based on the yarn transmission speed will inevitably be affected. If the yarn winds onto the connecting rod between the winding motor and the yarn bobbin, and the thickness of the connecting rod is much smaller than the diameter of the yarn bobbin... When the yarn winds onto the connecting rod, the detected diameter of the yarn bobbin will be significantly smaller than when it is on the bobbin. At this point, it can be preliminarily judged that a winding fault has occurred. However, further analysis is needed to confirm the fault. If the yarn winds onto the bobbin normally, the deviation angle between the yarn and the horizontal plane where the yarn guide is located will fluctuate within a small range. If a winding fault occurs, the yarn guide cannot correctly transmit the yarn to the bobbin when it moves, and the yarn is wound onto the connecting rod. As the yarn guide moves away from the bobbin, the deviation angle will become smaller and smaller, which is significantly beyond the normal deviation angle range. Therefore, combined with the change in the bobbin diameter, it can be determined that a winding fault has occurred. Fault detection can be completed without the need for additional detection devices, which greatly reduces the detection cost.

[0007] Preferably, in step S2, the yarn transmission speed is detected, and the yarn bobbin diameter is obtained based on the transmission speed, the motion cycle of the yarn guide, and the winding speed, including the following steps: Obtain the yarn guiding speed of the yarn guiding motor, and obtain the yarn transmission speed based on the yarn guiding speed; Within one cycle of each round trip movement of the yarn guide, the winding speed and transmission speed at each moment are obtained; Based on the winding speed and transmission speed at each moment, the distance between the surface of the yarn bobbin and the center of the yarn bobbin at each moment is obtained, and the average value of the distance between the surface of the yarn bobbin and the center of the yarn bobbin at each moment is calculated to obtain the yarn bobbin diameter.

[0008] In this scheme, to detect the diameter of the yarn bobbin and ensure that the detected diameter represents the diameter of all regions of the entire bobbin rather than just a portion, a complete round-trip motion cycle of the yarn guide is taken when detecting the diameter. Within this cycle, the radius of the yarn bobbin at each position of the yarn guide is calculated, and the average of these radii is used to obtain the overall diameter of the yarn bobbin. This prevents the detection of the diameter from being mistakenly taken as the diameter of a certain region due to its larger or smaller size, thereby improving the reliability and accuracy of the detection data. It also provides a data foundation for subsequent winding fault detection, ensuring that the fault detection results are accurate and reliable, and reducing the probability of detection errors.

[0009] Preferably, in S3, the yarn bobbin diameter is collected at the same time interval T, and the yarn bobbin diameter variation region in the time domain is constructed, including the following steps: Construct a Cartesian coordinate system with time as the horizontal axis and yarn bobbin diameter as the vertical axis, and define the region of yarn bobbin diameter variation along the time dimension as the region of diameter variation.

[0010] In this scheme, to facilitate the analysis of changes in yarn bobbin diameter, a Cartesian coordinate system with time as the horizontal axis and yarn bobbin diameter as the vertical axis is constructed. The real-time detected yarn bobbin diameter is used to construct a diameter variation region in the time dimension. The relationship between diameter variation and time variation is analyzed. Based on the sampling time, yarn bobbin diameter data is collected in the diameter variation region at each identical time interval T. This facilitates subsequent analysis and comparison of the collected data, making the analysis of bobbin diameter more convenient and intuitive.

[0011] Preferably, in step S3, the area of ​​yarn bobbin diameter variation is divided into sub-regions based on the collection points. The difference in yarn bobbin diameter collected from the collection points at the upper and lower boundaries of each sub-region is obtained. If the difference is less than or equal to 0, the sub-region is taken as the target sub-region. This includes the following steps: Obtain the time of the data collection point and number the data collection points based on the time of the data collection point; The cylinder diameter variation area is divided into sub-regions based on the time of the sampling points with adjacent numbers. Obtain the difference in yarn tube diameter between upstream and downstream sampling points within the segmented sub-region. If the difference is less than or equal to 0, the segmented sub-region is taken as the target segmented sub-region, and the target segmented sub-region is marked by the sampling point number.

[0012] In this solution, to conduct a preliminary analysis of the winding fault in the electronic yarn guide device, it is first necessary to determine whether any abnormal data occurred during the yarn bobbin production process. If the electronic yarn guide device is operating normally, the bobbin diameter will gradually increase during the yarn guiding process. Therefore, in order to match the bobbin and ensure a certain yarn density, the guiding motor speed will also gradually increase, and the guiding motor speed is equal to the yarn transmission speed. If a winding fault occurs, meaning the yarn cannot be wound normally onto the bobbin, and if the yarn winds onto the connecting rod, the connecting rod's thickness is significantly smaller than the bobbin diameter. Therefore, during the operation of the electronic yarn guide device, in order to... To ensure yarn density, the guiding speed of the yarn guiding motor is adjusted according to the thickness of the connecting rod. This means the guiding speed will slow down, and the yarn transmission speed will also slow down. At this time, the yarn bobbin diameter detected based on the yarn transmission speed will be significantly smaller than the previously detected diameter. Therefore, if the yarn bobbin diameter detected at two adjacent detection points is smaller than that at the previous detection point, there is a high probability that a fault has occurred during the time period between these two detection points. Further judgment is needed to determine whether it is a winding fault. Fault detection can be completed using the sensors built into the electronic yarn guiding device, which is very convenient, resource-efficient, and has low detection costs.

[0013] Preferably, in step S4, the deviation angle between the yarn between the yarn guide and the yarn bobbin and the horizontal plane where the yarn guide is located in the target segmented sub-region is detected. If the deviation angle is less than or equal to a preset threshold, an entanglement fault is determined to have occurred, and an alarm signal is sent. This includes the following steps: Real-time detection of the deviation angle between the yarn and the horizontal plane where the yarn guide is located between the yarn guide and the yarn bobbin, and construction of the angle change region of the deviation angle in the time domain; Obtain the deviation angle within the angle change area of ​​the target segmented sub-region. If the deviation angle is less than or equal to a preset threshold, an entanglement fault is determined. The detected information is integrated to generate an operation log and an alarm signal is sent.

[0014] In this solution, to further determine whether a fault is a yarn entanglement fault, the time period during which the abnormal yarn bobbin diameter is detected is processed. The deviation angle between the yarn and the horizontal plane of the yarn guide and the bobbin is detected in real time, and the data is imported into the time domain. A Cartesian coordinate system is constructed with time as the horizontal axis and the deviation angle as the vertical axis. The time domain of the target segmented sub-region is selected, and the change in the deviation angle within this time domain is obtained. When the yarn guide is working normally, theoretically, the deviation angle between the yarn and the horizontal plane of the yarn guide should be 90 degrees. However, in reality, this cannot be maintained indefinitely, but will fluctuate around 90 degrees within the allowable deviation range. If an entanglement fault occurs, the yarn guide cannot guide the yarn onto the bobbin; the yarn can only entangle on the connecting rod. Therefore, the deviation angle will significantly deviate from 90 degrees. When the deviation angle is less than the threshold, it indicates that the yarn cannot be guided into the bobbin. Combined with the change in the bobbin diameter, an entanglement fault can be determined. This allows for further determination of the entanglement fault, prevents incorrect judgments, and improves the accuracy of fault detection.

[0015] Preferably, the alarm signal includes at least the spindle position code, the shutdown control signal, and the time period of the fault occurrence.

[0016] In this solution, to promptly address electronic yarn guiding devices that experience yarn entanglement malfunctions, upon detecting such a fault, the system not only issues an alarm to alert staff but also generates a corresponding alarm signal based on the detected information. This signal helps staff quickly pinpoint the faulty electronic yarn guiding device. This pinpointing can be achieved through spindle coding; one spindle controls one electronic yarn guiding device, and the spindle code has a one-to-one correspondence with the device, allowing staff to quickly locate and address the faulty device. Simultaneously, the system must be shut down immediately upon malfunction to prevent the winding or guiding motor from jamming, causing equipment damage, increased economic losses, and safety hazards.

[0017] Preferably, the product parameters include at least the yarn type, target bobbin height, target bobbin diameter, yarn density, and production process.

[0018] In this solution, in order to determine some operating parameters of equipment such as winding motor, yarn guiding motor and yarn guide, the operating parameters of the above equipment can be deduced from some data in the product parameters. For example, the winding motor can maintain a constant speed of rotation during the yarn guiding process, the range of motion of the yarn guide is the target height of the yarn bobbin, and the rotation speed of the yarn guiding motor determines the yarn density, etc. Some data needed in fault detection can be deduced, which can reduce the use of sensors and reduce detection costs.

[0019] Preferably, the time interval T is determined based on the production process, yarn type, and yarn bobbin diameter range in the product parameters; the larger the yarn bobbin diameter, the longer the time interval T.

[0020] In this scheme, since the diameter of the yarn bobbin gradually increases with production time, and the larger the yarn bobbin diameter, the smaller the change in diameter within a certain time range, the yarn bobbin diameter range is divided into three ranges—small diameter, medium diameter, and large diameter—to prevent the difference in yarn bobbin diameter between the sampling points from being too small to be easily identified. The time interval T is adjusted according to the feedback of the detected yarn bobbin diameter based on which range the yarn bobbin diameter falls into. Selecting an appropriate time interval T for sampling the yarn bobbin can effectively prevent the yarn bobbin change from being too small due to the time interval T being too small, thus affecting the accuracy of fault detection.

[0021] The beneficial effects of this invention are as follows: This invention obtains the yarn bobbin diameter based on the winding speed of the winding motor and the guiding speed of the yarn guiding motor. The yarn bobbin diameter is collected at certain time intervals, and the collected yarn bobbin diameter is analyzed to obtain the time period in which the fault occurred. Then, the deviation angle in the time period is analyzed to determine whether an entanglement fault has occurred. Fault detection can be completed using only the sensor built into the electronic yarn guiding device itself, without the need to add additional sensors. The detection process is simple and the cost is low.

[0022] The above description of the invention is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0023] Other features, objects, and advantages of the invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings. The drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings.

[0024] Figure 1 This is a flowchart of a method for detecting winding faults in an electronic yarn guiding device according to the present invention; Figure 2 This is a schematic diagram of the electronic yarn guide device of the present invention. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only one preferred embodiment of this invention and are only used to explain this invention. They do not limit the scope of protection of this invention. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0026] Before discussing the exemplary embodiments in more detail, it should be mentioned that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although the flowcharts describe the operations (or steps) as sequential processes, many of the operations (or steps) can be performed in parallel, concurrently, or simultaneously. Furthermore, the order of the operations can be rearranged. The process can be terminated when its operation is completed, but it may also have additional steps not included in the figures; the process may correspond to a method, function, procedure, subroutine, subroutine, etc.

[0027] Example: Figure 1 As shown, existing electronic yarn guide devices require additional detection equipment for winding fault detection, resulting in high fault detection costs. This embodiment provides a method for detecting winding faults in electronic yarn guide devices, including the following steps: S1: Obtain the product parameters of the yarn bobbin based on production needs, and obtain the winding speed of the winding motor and the motion cycle of the yarn guide based on the product parameters.

[0028] S2: Detects the yarn transmission speed and obtains the yarn bobbin diameter based on the transmission speed, the movement cycle of the yarn guide, and the winding speed.

[0029] In this embodiment, the yarn transmission speed is detected, and the yarn bobbin diameter is obtained based on the transmission speed, the motion cycle of the yarn guide, and the winding speed, including the following steps: Obtain the yarn guiding speed V0 of the yarn guiding motor, and obtain the yarn transmission speed V = V0 based on the yarn guiding speed V0; Within one cycle T0 of each round-trip motion of the yarn guide, the winding speed V at each moment is obtained. t and transmission speed V; Based on the winding speed V at each moment t Given the transmission speed V, obtain the distance D between the surface of the yarn bobbin and the center of the yarn bobbin at each moment. t D t =V / V t For each moment, the distance D between the surface of the yarn bobbin and the center of the yarn bobbin t Calculate the average value to obtain the yarn bobbin diameter D.

[0030] In this embodiment, to detect the diameter of the yarn bobbin and ensure that the detected diameter represents the diameter of all regions of the yarn bobbin rather than just a portion, a complete round-trip motion cycle of the yarn guide is taken during the diameter detection. Within this cycle, the radius of one circumference of the yarn bobbin at the corresponding position of the yarn guide at each moment is calculated. The average of these radii at each moment yields the overall diameter of the yarn bobbin. This prevents the detection of the yarn bobbin diameter from being mistakenly taken as the detected diameter due to the larger or smaller diameter of a certain region, thereby improving the reliability and accuracy of the detection data. This provides a data foundation for subsequent winding fault detection, ensuring that the fault detection results are accurate and reliable, and reducing the probability of detection errors.

[0031] S3: Collect yarn bobbin diameter at the same time interval T and construct the yarn bobbin diameter variation region in the time domain; divide the yarn bobbin diameter variation region based on the collection points to obtain segmented sub-regions, obtain the yarn bobbin diameter difference collected by the collection points at the upper and lower boundaries of each segmented sub-region, and if the difference is less than or equal to 0, then the segmented sub-region is taken as the target segmented sub-region.

[0032] In this embodiment, the yarn bobbin diameter is collected at the same time interval T, and the yarn bobbin diameter variation region in the time domain is constructed, including the following steps: Construct a Cartesian coordinate system with time as the horizontal axis and yarn bobbin diameter as the vertical axis, and define the region of yarn bobbin diameter variation along the time dimension as the region of diameter variation.

[0033] To facilitate the analysis of changes in yarn bobbin diameter, this embodiment constructs a Cartesian coordinate system with time as the horizontal axis and yarn bobbin diameter as the vertical axis. The real-time detected yarn bobbin diameter is used to construct a diameter variation region along the time dimension. The relationship between diameter variation and time variation is analyzed. Based on the sampling time, yarn bobbin diameter data is collected in the diameter variation region at each identical time interval T. This facilitates subsequent analysis and comparison of the collected data, making the analysis of bobbin diameter more convenient and intuitive.

[0034] In this embodiment, the area of ​​yarn bobbin diameter variation is divided into sub-regions based on the collection points. The difference in yarn bobbin diameter collected by the collection points at the upper and lower boundaries of each sub-region is obtained. If the difference is less than or equal to 0, the sub-region is taken as the target sub-region. The steps include the following: Obtain the time of the data collection point and number the data collection points based on the time of the data collection point; The cylinder diameter variation area is divided into sub-regions based on the time of the sampling points with adjacent numbers. Obtain the difference D between the yarn tube diameters collected by the upstream sampling point i+1 and the downstream sampling point i within the segmented sub-region. i+1 -D iIf the difference is less than or equal to 0, the segmented sub-region is taken as the target segmented sub-region, and the target segmented sub-region is marked by the number of the collection point.

[0035] In this embodiment, to conduct a preliminary analysis of the winding fault in the electronic yarn guide device, it is first necessary to determine whether any abnormal data occurred during the yarn bobbin production process. If the electronic yarn guide device is operating normally, the bobbin diameter will gradually increase during the yarn guiding process. Therefore, in order to match the bobbin and ensure a certain yarn density, the guiding speed of the guiding motor will also gradually increase, and the guiding speed of the guiding motor is equal to the yarn transmission speed. If a winding fault occurs, that is, the yarn cannot be wound normally onto the bobbin, and if the yarn is wound onto the connecting rod, the thickness of the connecting rod is significantly smaller than the bobbin diameter. Therefore, during the operation of the electronic yarn guide device, in order to... To ensure yarn density, the guiding speed of the yarn guiding motor is adjusted according to the thickness of the connecting rod. This means the guiding speed will slow down, and the yarn transmission speed will also slow down. At this time, the yarn bobbin diameter detected based on the yarn transmission speed will be significantly smaller than the previously detected diameter. Therefore, if the yarn bobbin diameter detected at two adjacent detection points is smaller than that at the previous detection point, there is a high probability that a fault has occurred during the time period between these two detection points. Further judgment is needed to determine whether it is a winding fault. Fault detection can be completed using the sensors built into the electronic yarn guiding device, which is very convenient, resource-efficient, and has low detection costs.

[0036] S4: Detect the deviation angle between the yarn between the yarn guide and the yarn bobbin and the horizontal plane where the yarn guide is located in the target segmented sub-region. If the deviation angle is less than or equal to the preset threshold, it is determined that a winding fault has occurred and an alarm signal is sent.

[0037] In this embodiment, the deviation angle between the yarn between the yarn guide and the yarn bobbin and the horizontal plane where the yarn guide is located in the target segmented sub-region is detected. If the deviation angle is less than or equal to a preset threshold, an entanglement fault is determined to have occurred, and an alarm signal is sent. The process includes the following steps: Real-time detection of the deviation angle between the yarn and the horizontal plane where the yarn guide is located between the yarn guide and the yarn bobbin, and construction of the angle change region of the deviation angle in the time domain; Obtain the deviation angle within the angle change area of ​​the target segmented sub-region. If the deviation angle is less than or equal to a preset threshold, an entanglement fault is determined. The preset threshold includes, but is not limited to, 70 degrees. When the deviation angle is less than or equal to 70 degrees, an entanglement fault is determined. The detected information is integrated to generate an operation log and an alarm signal is sent.

[0038] In this embodiment, to further determine whether the fault is a yarn entanglement fault, the time period in which the abnormal yarn bobbin diameter was detected is processed. The deviation angle between the yarn and the horizontal plane where the yarn guide is located is detected in real time and imported into the time domain. A Cartesian coordinate system is constructed with time as the horizontal axis and the deviation angle as the vertical axis. The time domain containing the target segmented sub-region is selected, and the change of the deviation angle in this time domain is obtained. Theoretically, when the yarn guide is working normally, the deviation angle between the yarn and the horizontal plane where the yarn guide is located should be 90 degrees. However, in reality, this cannot be maintained indefinitely. The deviation angle will fluctuate around 90 degrees within the allowable deviation range. For example, the actual deviation angle should fluctuate between 70 and 90 degrees. However, if a winding fault occurs, the yarn guide cannot guide the yarn onto the yarn bobbin. The yarn can only wind around the connecting rod, so the deviation angle will deviate significantly from 90 degrees, or even reach 30 degrees. This situation occurs when the yarn guide is pulling the yarn but the yarn cannot move according to the yarn guide. When the deviation angle is less than the threshold, it means that the yarn cannot be guided into the yarn bobbin. Combined with the change in the yarn bobbin diameter, it can be determined that a winding fault has occurred. This can further determine the winding fault, prevent incorrect judgments, and improve the accuracy of fault detection.

[0039] In this embodiment, the alarm signal includes at least the spindle position code, the shutdown control signal, and the time period during which the fault occurred.

[0040] In this embodiment, to promptly address yarn entanglement malfunctions in the electronic yarn guiding device, upon detecting such a fault, not only should an alarm be triggered to alert personnel, but a corresponding alarm signal should also be generated based on the detected information to assist personnel in quickly locating the faulty electronic yarn guiding device. This locating can be achieved through spindle coding; one spindle controls one electronic yarn guiding device, and there is a one-to-one correspondence between the spindle code and the electronic yarn guiding device, allowing personnel to quickly locate the faulty device and address it promptly. Simultaneously, the device should be shut down immediately upon malfunction to prevent the winding motor or yarn guiding motor from jamming, causing equipment damage, increased economic losses, and safety hazards.

[0041] In this embodiment, the product parameters include at least the yarn type, target bobbin height, target bobbin diameter, yarn density, and production process.

[0042] In this embodiment, some operating parameters of equipment such as winding motors, yarn guiding motors, and yarn guides are determined. The operating parameters of the above-mentioned equipment can be deduced from some data in the product parameters. For example, the winding motor can maintain a constant speed of rotation during the yarn guiding process, the range of motion of the yarn guide is the target height of the yarn bobbin, and the rotation speed of the yarn guiding motor determines the yarn density, etc. Some data needed in fault detection can be deduced, which can reduce the use of sensors and reduce detection costs.

[0043] In this embodiment, the time interval T is determined based on the production process, yarn type, and yarn bobbin diameter range in the product parameters. The larger the yarn bobbin diameter, the longer the time interval T.

[0044] In this embodiment, since the diameter of the yarn bobbin gradually increases with production time, and the larger the yarn bobbin diameter, the smaller the change in diameter within a certain time range, the yarn bobbin diameter range is divided into three ranges—small, medium, and large—to prevent the difference in yarn bobbin diameter between the sampling points from being too small to be easily identified. This range may include, but is not limited to, 120≤D<165mm for small diameter, 165≤D<210mm for medium diameter, and 210≤D≤250mm for large diameter. The time interval T is adjusted based on the feedback from the detected yarn bobbin diameter and the range in which the yarn bobbin diameter falls. Selecting an appropriate time interval T for sampling the yarn bobbin can effectively prevent the yarn bobbin change from being too small due to an excessively small time interval T, thus affecting the accuracy of fault detection.

[0045] This embodiment applies to electronic yarn guiding devices, such as... Figure 2 As shown, it includes: a winding motor for winding yarn to form a yarn bobbin; A yarn guide makes a periodic reciprocating motion to accurately guide the yarn into the yarn bobbin; A yarn guide motor is used to transport yarn to the yarn guide. The single-spindle control system is used to control the corresponding electronic yarn guide device according to the spindle position code.

[0046] In this embodiment, to achieve winding fault detection using the built-in detection sensor of the electronic yarn guide device, the winding speed of the winding motor in the electronic yarn guide device is obtained by determining the production requirements before the yarn bobbin is produced. By analyzing the winding speed and the yarn transmission speed, the distance between the yarn and the center of the yarn bobbin at each moment can be obtained. Then, by analyzing the distance between the yarn and the center of the yarn bobbin at each moment according to the movement cycle of the yarn guide, the diameter of the yarn bobbin can be obtained. Since the diameter of the yarn bobbin will inevitably gradually increase over time during the winding process, if a winding fault occurs, the diameter of the yarn bobbin calculated by the yarn transmission speed will inevitably be affected. If the yarn winds onto the connecting rod between the winding motor and the yarn bobbin, and the thickness of the connecting rod is much smaller than the diameter of the yarn bobbin... When the yarn winds onto the connecting rod, the detected diameter of the yarn bobbin will be significantly smaller than when it is on the bobbin. At this point, it can be preliminarily judged that a winding fault has occurred. However, further analysis is needed to confirm the fault. If the yarn winds onto the bobbin normally, the deviation angle between the yarn and the horizontal plane where the yarn guide is located will fluctuate within a small range. If a winding fault occurs, the yarn guide cannot correctly transmit the yarn to the bobbin when it moves, and the yarn is wound onto the connecting rod. As the yarn guide moves away from the bobbin, the deviation angle will become smaller and smaller, which is significantly beyond the normal deviation angle range. Therefore, combined with the change in the bobbin diameter, it can be determined that a winding fault has occurred. Fault detection can be completed without the need for additional detection devices, which greatly reduces the detection cost.

[0047] As can be seen from the above embodiments, it has at least the following substantial effects: This invention obtains the yarn bobbin diameter based on the winding speed of the winding motor and the guiding speed of the yarn guiding motor. The yarn bobbin diameter is collected at certain time intervals, and the collected yarn bobbin diameter is analyzed to obtain the time period of the fault. Then, the deviation angle in the time period is analyzed to determine whether the winding fault has occurred. The fault detection can be completed using the sensor built into the electronic yarn guiding device itself, without the need to add additional sensors. The detection process is simple and the cost is low.

[0048] The specific embodiments described above are preferred embodiments of the electronic yarn guiding device winding fault detection method of the present invention, and are not intended to limit the specific scope of the present invention. The scope of the present invention includes but is not limited to the specific embodiments described above. All equivalent changes made in accordance with the shape and structure of the present invention are within the protection scope of the present invention.

Claims

1. A method for detecting winding faults in an electronic yarn guide device, applicable to electronic yarn guide devices, wherein the electronic yarn guide device comprises: A winding motor is used to wind yarn to form a yarn bobbin; A yarn guide makes a periodic reciprocating motion to accurately guide the yarn into the yarn bobbin; A yarn guide motor is used to transport yarn to the yarn guide. A single-spindle control system is used to control the corresponding electronic yarn guiding device according to the spindle position code; Its characteristics include the following steps: S1. Obtain the product parameters of the yarn bobbin based on production needs, and obtain the winding speed of the winding motor and the motion cycle of the yarn guide based on the product parameters. S2. Detect the yarn transmission speed and obtain the yarn bobbin diameter based on the transmission speed, the motion cycle of the yarn guide and the winding speed. S3. Collect the yarn bobbin diameter at the same time interval T and construct the yarn bobbin diameter change region in the time domain; divide the yarn bobbin diameter change region based on the collection points to obtain the segmented sub-regions, and obtain the yarn bobbin diameter difference collected by the collection points at the upper and lower boundaries of each segmented sub-region. If the difference is less than or equal to 0, the segmented sub-region is taken as the target segmented sub-region. S4. Detect the deviation angle between the yarn between the yarn guide and the yarn bobbin and the horizontal plane where the yarn guide is located in the target segmented sub-region. If the deviation angle is less than or equal to the preset threshold, it is determined that a winding fault has occurred and an alarm signal is sent. In step S2, the yarn transmission speed is detected, and the yarn bobbin diameter is obtained based on the transmission speed, the motion cycle of the yarn guide, and the winding speed. This includes the following steps: Obtain the yarn guiding speed of the yarn guiding motor, and obtain the yarn transmission speed based on the yarn guiding speed; Within one cycle of each round trip movement of the yarn guide, the winding speed and transmission speed at each moment are obtained; Based on the winding speed and transmission speed at each moment, the distance between the surface of the yarn bobbin and the center of the yarn bobbin at each moment is obtained, and the average value of the distance between the surface of the yarn bobbin and the center of the yarn bobbin at each moment is calculated to obtain the yarn bobbin diameter.

2. The method for detecting winding faults in an electronic yarn guiding device according to claim 1, characterized in that: In S3, the yarn bobbin diameter is collected at the same time interval T, and the yarn bobbin diameter variation region in the time domain is constructed, including the following steps: Construct a Cartesian coordinate system with time as the horizontal axis and yarn bobbin diameter as the vertical axis, and define the region of yarn bobbin diameter variation along the time dimension as the region of diameter variation.

3. The method for detecting winding faults in an electronic yarn guiding device according to claim 1, characterized in that: In S3, the area of ​​yarn bobbin diameter variation is divided into sub-regions based on the collection points. The difference in yarn bobbin diameter between the collection points at the upper and lower boundaries of each sub-region is obtained. If the difference is less than or equal to 0, the sub-region is taken as the target sub-region. The process includes the following steps: Obtain the time of the data collection point and number the data collection points based on the time of the data collection point; The cylinder diameter variation area is divided into sub-regions based on the time of the sampling points with adjacent numbers. Obtain the difference in yarn tube diameter between upstream and downstream sampling points within the segmented sub-region. If the difference is less than or equal to 0, the segmented sub-region is taken as the target segmented sub-region, and the target segmented sub-region is marked by the sampling point number.

4. The method for detecting winding faults in an electronic yarn guiding device according to claim 1, characterized in that: In S4, the deviation angle between the yarn between the yarn guide and the yarn bobbin and the horizontal plane where the yarn guide is located in the target segmented sub-region is detected. If the deviation angle is less than or equal to a preset threshold, an entanglement fault is determined to have occurred, and an alarm signal is sent. This includes the following steps: Real-time detection of the deviation angle between the yarn and the horizontal plane where the yarn guide is located between the yarn guide and the yarn bobbin, and construction of the angle change region of the deviation angle in the time domain; Obtain the deviation angle within the angle change area of ​​the target segmented sub-region. If the deviation angle is less than or equal to a preset threshold, an entanglement fault is determined. The detected information is integrated to generate an operation log and an alarm signal is sent.

5. A method for detecting winding faults in an electronic yarn guiding device according to claim 1 or 4, characterized in that: The alarm signal includes at least the spindle position code, the shutdown control signal, and the time period in which the fault occurred.

6. The method for detecting winding faults in an electronic yarn guiding device according to claim 1, characterized in that: The product parameters include at least the yarn type, target bobbin height, target bobbin diameter, yarn density, and production process.

7. The method for detecting winding faults in an electronic yarn guiding device according to claim 1, characterized in that: The time interval T is determined based on the production process, yarn type, and yarn bobbin diameter range in the product parameters. The larger the yarn bobbin diameter, the longer the time interval T.

Images