Winding fault detection method for electronic yarn guide device

Abstract

The invention discloses a winding fault detection method for an electronic yarn guide device, and belongs to the technical field of fault detection of electronic yarn guide devices.The winding speed of a winding motor is obtained by analyzing production requirements, the diameter of a yarn drum is calculated based on the winding speed and the yarn guide speed of the yarn guide motor, and the winding fault of the electronic yarn guide device is detected in real time. When it is detected that the diameter of the yarn drum does not change or become smaller within a certain time period, namely a winding fault possibly occurs, the time period is further analyzed, the deviation angle formed by the yarn between the yarn guide and the yarn drum and the horizontal plane where the yarn guide is located is detected, and if the deviation angle deviates from the normal range, it can be judged that the winding fault occurs to the electronic yarn guide device. According to the scheme, on the basis that a detection sensor is not added, the winding fault can be detected through detection data of the sensor of the electronic yarn guide device, and the detection cost is greatly reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic yarn guide device fault detection, and in particular to a method for detecting winding faults of an electronic yarn guide device. Background Art

[0002] The yarn bobbin (also known as yarn dropping) is the first process of the pre-weaving preparation project. The task of the yarn bobbin process is first to connect the tube yarn (or hank yarn) to form a large-capacity bobbin for warping, reeling, twisting, weft winding, dyeing, and can also be used as the weft bobbin of the shuttleless loom and the bobbin for knitting. In the process of yarn guiding, there is a very low probability of winding failure, that is, when winding the yarn, the yarn is not wound around the yarn bobbin, but is wound around the connecting rod used to connect the winding motor to the yarn bobbin. In this case, the winding motor is very likely to get stuck and cause the failure of the entire electronic yarn guiding device. The current detection method for this fault is to install a detection sensor on the connecting rod of each spindle position to detect whether the yarn is wound around the connecting rod. However, this solution requires an additional detection sensor for each spindle position, and an electronic yarn guiding device is provided with a large number of spindle positions. It is expensive to install a detection sensor on each spindle position, and the cost is too high.

[0003] Chinese patent, publication number: CN110004573A, publication date: July 12, 2019, discloses a yarn fault detection method and device based on vibration data, the method comprising: allowing the yarn to be detected to pass through an elastic body during movement; using the vibration data of the elastic body to determine the fault state of the yarn to be detected: firstly, collecting training vibration data, grouping them using a sliding window method, extracting training feature vectors for each group, and training a machine learning classifier using a training data set consisting of training feature vectors with fault state labels; then using the detection vibration data and the trained machine learning classifier to determine the fault state of the yarn to be detected, but the fault detection uses a large number of sensors, and cannot perform fault detection based on the sensors provided by the electronic yarn guide device itself, and the detection cost is high. Summary of the invention

[0004] In view of the problem that winding fault detection of existing electronic yarn guide devices requires additional installation of detection devices, which leads to high fault detection cost, the present invention proposes a winding fault detection method for an electronic yarn guide device, by analyzing production needs, the winding speed of the winding motor is obtained, the diameter of the yarn bobbin is calculated based on the winding speed and the guiding speed of the yarn guide motor, and the yarn bobbin diameter is detected in real time. When it is detected that the yarn bobbin diameter does not change or becomes smaller in a certain time period, it means that a winding fault may have occurred. The time period is further analyzed to detect the deviation angle formed by the yarn between the yarn guide and the yarn bobbin and the horizontal plane where the yarn guide is located. If the deviation angle deviates from the normal range, it can be determined that a winding fault has occurred in the electronic yarn guide device. This scheme can detect winding faults by using the detection data of the sensor provided by the electronic yarn guide device itself without adding detection sensors, thereby greatly reducing the detection cost.

[0005] In a first aspect, a technical solution provided in an embodiment of the present invention is: a method for detecting winding faults of an electronic yarn guide device, applicable to an electronic yarn guide device, wherein the electronic yarn guide device comprises: A winding motor, used for winding the yarn to form a yarn bobbin; The yarn guide performs periodic reciprocating motion to accurately introduce the yarn into the bobbin; A yarn guide motor, used for transferring the yarn into the yarn guide; Single spindle control system, used to control the corresponding electronic yarn guide device according to the spindle position code; The following steps are involved: S1. Obtain product parameters of the yarn bobbin based on production requirements, and obtain the winding speed of the winding motor and the movement cycle of the yarn guide based on the product parameters; S2, detecting the transmission speed of the yarn, and obtaining the diameter of the yarn bobbin based on the transmission speed, the movement cycle of the yarn guide and the winding speed; S3, collecting the diameter of the yarn tube at the same time interval T, and constructing the diameter change area of ​​the yarn tube diameter in the time domain; segmenting the diameter change area based on the collection points to obtain segmented sub-areas, obtaining the difference in the yarn tube diameter collected by the collection points at the upper and lower boundaries of each segmented sub-area, and if the difference is less than or equal to 0, the segmented sub-area is used as the target segmented sub-area; S4. Detecting 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-area. If the deviation angle is less than or equal to a preset threshold, it is determined that a winding fault occurs and an alarm signal is sent.

[0006] In this scheme, in order to realize winding fault detection with the 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 demand before producing the yarn tube, and the distance between the yarn and the center of the yarn tube at each moment can be obtained by analyzing the winding speed and the transmission speed of the yarn, and then the diameter of the yarn tube can be obtained by analyzing the distance between the yarn and the center of the yarn tube at each moment according to the movement cycle of the yarn guide. During the winding process of the yarn tube, the diameter of the yarn tube will inevitably increase with time. Therefore, if a winding fault occurs, the diameter of the yarn tube calculated by the yarn transmission speed will inevitably be affected. If the yarn is wound around the connecting rod between the winding motor and the yarn tube, and the thickness of the connecting rod is much smaller than the diameter of the yarn tube When the yarn is wound onto the connecting rod, the detected yarn tube diameter will be significantly smaller than that on the yarn tube. At this time, it can be preliminarily determined that a winding fault has occurred, but further analysis is needed to determine the fault. If the yarn is wound onto the yarn tube normally, the deviation angle formed by the yarn between the yarn guide and the yarn tube and the horizontal plane where the yarn guide is located will fluctuate within a smaller range. If a winding fault occurs, the yarn guide cannot correctly transmit the yarn to the yarn tube during movement, and the yarn is wound onto the connecting rod. As the yarn guide moves away from the yarn tube, the deviation angle will become smaller and smaller, which is obviously beyond the normal deviation angle range. Therefore, combined with the change in the yarn tube diameter, it can be determined that a winding fault has occurred. No additional detection device needs to be added to complete fault detection, which greatly reduces the detection cost.

[0007] Preferably, in S2, the transmission speed of the yarn is detected, and the diameter of the yarn tube is obtained based on the transmission speed, the movement cycle of the yarn guide and the winding speed, including the following steps: Obtaining a yarn guide speed of a yarn guide motor, and obtaining a transmission speed of the yarn based on the yarn guide speed; In each cycle of the yarn guide's reciprocating motion, the winding speed and the transmission speed at each moment are obtained; Based on the winding speed and transmission speed at each moment, the distance between the yarn tube surface and the yarn tube center at each moment is obtained, and the average value of the distance between the yarn tube surface and the yarn tube center at each moment is calculated to obtain the yarn tube diameter.

[0008] In this scheme, in order to detect the diameter of the yarn bobbin and ensure that the detected diameter of the yarn bobbin is the diameter of each area of ​​the entire yarn bobbin rather than the diameter of a certain part, when detecting the diameter of the yarn bobbin, a complete reciprocating motion cycle of the yarn guide is taken, and the radius of a circle of the yarn bobbin corresponding to the position of the yarn guide at each moment is calculated within this motion cycle. The radius at each moment is averaged to obtain the overall diameter of the yarn bobbin, which can prevent the situation where the diameter of a certain area is larger or smaller when detecting the diameter of the yarn bobbin and use it as the detected diameter data, thereby improving the reliability of the detection data, improving the detection accuracy, and providing a data basis for subsequent winding fault detection, so that the fault detection results are true and reliable, and the probability of detection errors is reduced.

[0009] Preferably, in S3, collecting the yarn tube diameters at the same time interval T and constructing the yarn tube diameter change region in the time domain includes the following steps: A Cartesian coordinate system is constructed with time as the horizontal axis and the yarn bobbin diameter as the vertical axis, and the area constructed by the yarn bobbin diameter in the time dimension is the yarn bobbin diameter change area.

[0010] In this scheme, in order to facilitate the analysis of the change of yarn bobbin diameter, a Cartesian coordinate system with time as the horizontal axis and the yarn bobbin diameter as the vertical axis is constructed. The yarn bobbin diameter detected in real time is used to construct a bobbin diameter change area in the time dimension, and the relationship between the bobbin diameter change and the time change is analyzed. According to the sampling time, the yarn bobbin diameter data is collected in the bobbin diameter change area at each same time interval T, which facilitates the subsequent analysis and comparison of the collected data, making the analysis of the bobbin diameter more convenient and intuitive.

[0011] Preferably, in S3, the bobbin diameter change area is segmented based on the collection points to obtain segmented sub-areas, and the difference in bobbin diameters collected by the collection points at the upper and lower boundaries of each segmented sub-area is obtained. If the difference is less than or equal to 0, the segmented sub-area is used as the target segmented sub-area, including the following steps: Obtain the time at which the collection point is located, and number the collection point based on the time of the collection point; The barrel diameter change area is segmented based on the time instants of the adjacent numbered acquisition points to obtain segmented sub-areas; The difference in yarn bobbin diameters collected by the upstream and downstream collection points with adjacent numbers in the segmented sub-region is obtained. If the difference is less than or equal to 0, the segmented sub-region is used as the target segmented sub-region, and the target segmented sub-region is marked by the number of the collection point.

[0012] In this scheme, in order to conduct a preliminary analysis of the winding failure of the electronic yarn guide device, it is first necessary to determine whether abnormal data appears in the process of producing the yarn tube. If the electronic yarn guide device operates normally, the diameter of the yarn tube will gradually increase during the yarn guiding process. Therefore, in order to cooperate with the yarn tube and ensure a certain yarn density, the yarn guiding speed of the yarn guide motor will gradually increase, and the yarn guiding speed of the yarn guide motor is equal to the transmission speed of the yarn. If a winding failure occurs, that is, the yarn cannot be normally wound onto the yarn tube. If the yarn is wound onto the connecting rod, the thickness of the connecting rod is obviously smaller than the diameter of the yarn tube. Therefore, during the operation of the electronic yarn guide device, In order to ensure the yarn density, the yarn guiding speed of the yarn guiding motor will be adjusted according to the thickness of the connecting rod, that is, the yarn guiding speed will slow down, and the yarn transmission speed will also slow down. At this time, the yarn tube diameter detected according to the yarn transmission speed will be significantly smaller than the tube diameter detected last time. Therefore, if the yarn tube diameter detected by two adjacent detection points is smaller than the detection point at the last moment, there is a high probability that a fault has occurred in the time period between the two detection points. Further judgment is needed to determine whether it is a winding fault. The fault detection can be completed by using the sensor provided by the electronic yarn guiding device, which is very convenient and consumes less resources, and the detection cost is not high.

[0013] Preferably, in S4, the deviation angle formed by the yarn between the yarn guide and the yarn tube and the horizontal plane where the yarn guide is located in the target segmented sub-area is detected. If the deviation angle is less than or equal to a preset threshold, it is determined that a winding fault occurs, and an alarm signal is sent, including the following steps: Real-time detection of the deviation angle between the yarn between the yarn guide and the yarn tube and the horizontal plane where the yarn guide is located, and construction of the angle change area of ​​the deviation angle in the time domain; The deviation angle within the angle change area where the target segmentation sub-area is located is obtained. If the deviation angle is less than or equal to the preset threshold, it is determined that a winding fault has occurred. The detected information is integrated to generate an operation log and an alarm signal is sent.

[0014] In this scheme, in order to further determine whether the fault is a yarn winding fault, the time period in which the abnormal diameter of the yarn tube is detected is processed, and the deviation angle formed by the yarn between the yarn guide and the yarn tube and the horizontal plane where the yarn guide is located is detected in real time. The data is imported into the time domain, and a Cartesian coordinate system with time as the horizontal axis and the deviation angle as the vertical axis is constructed. The time domain where the target segmentation sub-area is located is selected to obtain the change of the deviation angle in the time domain. When the yarn guide is working normally, theoretically, the deviation angle formed by the yarn between the yarn guide and the yarn tube and the horizontal plane where the yarn guide is located should be 90 degrees. However, it is actually impossible to maintain it all the time, but it will fluctuate around 90 degrees within the allowable deviation range. If a winding fault occurs, the yarn guide cannot guide the yarn into the yarn tube, and the yarn can only be wound around the connecting rod. Therefore, the deviation angle will obviously deviate from 90 degrees, and when it is less than the threshold value of the deviation angle, it means that the yarn cannot be introduced into the yarn tube. Combined with the change in the diameter of the yarn tube, it can be judged that a winding fault has occurred, and the winding fault can be further judged to prevent wrong judgments and improve the accuracy of fault detection.

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

[0016] In this scheme, in order to promptly deal with the electronic yarn guide device where the yarn winding fault occurs, when the device is found to have a winding fault, not only an alarm is sounded to remind the staff that a fault has occurred, but also a corresponding alarm signal is generated based on the detected information to assist the staff to promptly lock the faulty electronic yarn guide device, wherein the locking can be performed through the spindle position coding. One spindle position controls one electronic yarn guide device, and the spindle position coding and the electronic yarn guide device have a one-to-one correspondence, which can facilitate the staff to quickly lock the faulty device and deal with it in time; at the same time, the device is shut down in time when a fault occurs to prevent the winding motor or the yarn guide motor from getting stuck and causing damage to the equipment, thereby increasing economic losses and causing safety hazards.

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

[0018] In this scheme, in order to determine some operating parameters of equipment such as the winding motor, yarn guide motor and yarn guide, the operating parameters of the above equipment can be inferred through some data in the product parameters. For example, the winding motor can maintain a uniform rotation during the yarn guiding process, the motion range of the yarn guide is the target height of the yarn bobbin, and the rotation speed of the yarn guide motor determines the yarn density, etc. Some required data in fault detection can be inferred, 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 cone diameter range in the product parameters. The larger the yarn cone diameter, the longer the time interval T.

[0020] In this scheme, since the diameter of the yarn bobbin gradually increases with the change of production time, and the larger the diameter of the yarn bobbin, the smaller the change of the diameter within a certain time range, when selecting the time interval T, in order to prevent the difference in the diameters of the yarn bobbins collected before and after the collection point from being too small to be difficult to identify, the yarn bobbin diameter range is divided into three ranges: small diameter, medium diameter and large diameter. The time interval T is subject to feedback from the detected yarn bobbin diameter and is adjusted according to the range in which the yarn bobbin diameter is. Selecting the appropriate time interval T for collecting yarn bobbins can effectively prevent the yarn bobbin from changing significantly due to the time interval T being too small, thereby affecting the accuracy of fault detection.

[0021] Beneficial effects of the present invention: The present invention obtains the diameter of the yarn bobbin based on the winding speed of the winding motor and the yarn guiding speed of the yarn guiding motor, collects the diameter of the yarn bobbin at a certain time interval, analyzes the collected yarn bobbin diameter to obtain the time period when the fault occurs, and then analyzes the deviation angle in the time period to determine whether a winding fault occurs. Fault detection can be completed by using the sensor provided by 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 invention content is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings. The drawings are only for the purpose of illustrating preferred embodiments and are not to be considered as limiting the present invention. Also, the same reference symbols are used throughout the drawings to represent the same parts.

[0024] Figure 1 This is a flow chart of a method for detecting winding faults of an electronic yarn guide device according to the present invention; Figure 2 It is a schematic diagram of the electronic yarn guiding device of the present invention. DETAILED DESCRIPTION

[0025] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific implementation method described herein is only an optimal embodiment of the present invention, which is only used to explain the present invention and does not limit the scope of protection of the present invention. All other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present 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 flow charts. Although the flow charts describe the operations (or steps) as sequential processes, many of the operations (or steps) therein can be implemented in parallel, concurrently, or simultaneously. In addition, the order of the operations can be rearranged. The process can be terminated when its operation is completed, but can also have additional steps not included in the drawings; the process can correspond to a method, function, procedure, subroutine, subprogram, etc.

[0027] Example: Figure 1 As shown, the existing electronic yarn guide device winding fault detection requires additional installation of a detection device, which leads to a high fault detection cost. This embodiment provides an electronic yarn guide device winding fault detection method, including the following steps: S1: Obtain product parameters of the yarn bobbin based on production requirements, and obtain the winding speed of the winding motor and the movement period of the yarn guide based on the product parameters.

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

[0029] In this embodiment, the transmission speed of the yarn is detected, and the diameter of the yarn tube is obtained based on the transmission speed, the movement cycle of the yarn guide and the winding speed, including the following steps: Obtaining a yarn guide speed V0 of a yarn guide motor, and obtaining a yarn transmission speed V=V0 based on the yarn guide speed V0; In each cycle T0 of the yarn guide's reciprocating motion, obtain the winding speed V at each moment. t and transmission speed V; Based on the winding speed V at each moment t and the transmission speed V, obtain the distance D between the yarn tube surface and the yarn tube center at each moment t , D t =V / V t , for each moment, the distance D between the yarn tube surface and the yarn tube center t Calculate the average value to obtain the yarn cone diameter D.

[0030] In order to detect the diameter of the yarn bobbin and ensure that the detected diameter of the yarn bobbin is the diameter of each area of ​​the entire yarn bobbin rather than the diameter of a certain part, this embodiment takes a complete reciprocating motion cycle of the yarn guide when detecting the diameter of the yarn bobbin, and calculates the radius of a circle of the yarn bobbin at the corresponding position of the yarn guide at each moment in this motion cycle, and averages the radius at each moment to obtain the overall diameter of the yarn bobbin, which can prevent the situation where the diameter of a certain area is larger or smaller when detecting the diameter of the yarn bobbin and use it as the detected diameter data, thereby improving the reliability of the detection data, improving the detection accuracy, and providing a data basis for subsequent winding fault detection, so that the fault detection result is true and reliable, and the probability of detection errors is reduced.

[0031] S3: Collect the diameter of the yarn bobbin at the same time interval T, and construct the diameter change area of ​​the yarn bobbin in the time domain; segment the diameter change area based on the collection points to obtain segmented sub-areas, and obtain the difference in the yarn bobbin diameter collected by the collection points at the upper and lower boundaries of each segmented sub-area. If the difference is less than or equal to 0, the segmented sub-area is used as the target segmented sub-area.

[0032] In this embodiment, collecting the yarn tube diameters at the same time interval T and constructing the yarn tube diameter change area in the time domain includes the following steps: A Cartesian coordinate system is constructed with time as the horizontal axis and the yarn bobbin diameter as the vertical axis, and the area constructed by the yarn bobbin diameter in the time dimension is the yarn bobbin diameter change area.

[0033] In order to facilitate the analysis of changes in the diameter of the yarn bobbin, this embodiment constructs a Cartesian coordinate system with time as the horizontal axis and the diameter of the yarn bobbin as the vertical axis. The yarn bobbin diameter detected in real time is used to construct a diameter change area in the time dimension, and the relationship between the diameter change and the time change is analyzed. According to the sampling time, the yarn bobbin diameter data is collected in the diameter change area at each same time interval T, which facilitates the subsequent analysis and comparison of the collected data, making the analysis of the diameter more convenient and intuitive.

[0034] In this embodiment, the bobbin diameter change area is segmented based on the collection points to obtain segmented sub-areas, and the difference in bobbin diameters collected by the collection points at the upper and lower boundaries of each segmented sub-area is obtained. If the difference is less than or equal to 0, the segmented sub-area is used as the target segmented sub-area, including the following steps: Obtain the time at which the collection point is located, and number the collection point based on the time of the collection point; The barrel diameter change area is segmented based on the time instants of the adjacent numbered acquisition points to obtain segmented sub-areas; Get the difference D of the yarn tube diameter collected by the upstream collection point i+1 and the downstream collection point i with adjacent numbers in the segmentation sub-area i+1 -D iIf the difference is less than or equal to 0, the segmentation sub-region is used as the target segmentation sub-region, and the target segmentation sub-region is marked by the number of the acquisition point.

[0035] In order to conduct a preliminary analysis of the winding failure of the electronic yarn guide device in this embodiment, it is first necessary to determine whether abnormal data appears in the process of producing the yarn tube. If the electronic yarn guide device operates normally, the diameter of the yarn tube will gradually increase during the yarn guiding process. Therefore, in order to match the yarn tube and ensure a certain yarn density, the yarn guiding speed of the yarn guide motor will also gradually increase, and the yarn guiding speed of the yarn guide motor is equal to the transmission speed of the yarn. If a winding failure occurs, that is, the yarn cannot be normally wound onto the yarn tube. If the yarn is wound onto the connecting rod, the thickness of the connecting rod is obviously smaller than the diameter of the yarn tube. Therefore, during the operation of the electronic yarn guide device, in order to To ensure the yarn density, the yarn guiding speed of the yarn guiding motor will be adjusted according to the thickness of the connecting rod, that is, the yarn guiding speed will slow down, and the yarn transmission speed will also slow down. At this time, the yarn tube diameter detected according to the yarn transmission speed will be significantly smaller than the tube diameter detected last time. Therefore, if the yarn tube diameter detected by two adjacent detection points is smaller than the detection point at the last moment, there is a high probability that a fault has occurred in the time period between the two detection points. Further judgment is needed to determine whether it is a winding fault. The fault detection can be completed by using the sensor provided by the electronic yarn guiding device, which is very convenient and consumes less resources, and the detection cost is not high.

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

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

[0038] In order to further determine whether the fault is a yarn winding fault, the present embodiment processes the time period in which the abnormal diameter of the yarn tube is detected, and detects the deviation angle formed by the yarn between the yarn guide and the yarn tube and the horizontal plane where the yarn guide is located in real time, imports the data into the time domain, constructs a Cartesian coordinate system with time as the horizontal axis and the deviation angle as the vertical axis, selects the time domain where the target segmentation sub-area is located, and obtains the change of the deviation angle in the time domain. When the yarn guide is working normally, theoretically, the deviation angle formed by the yarn between the yarn guide and the yarn tube and the horizontal plane where the yarn guide is located should be 90 degrees. However, in practice, it is not possible to maintain it all the time. It will fluctuate around 90 degrees within the allowable deviation range. For example, the actual deviation angle should fluctuate between 70-90 degrees. If a winding fault occurs, the yarn guide cannot guide the yarn into the yarn tube, and the yarn can only be wound around the connecting rod. Therefore, the deviation angle will obviously deviate from 90 degrees, or even 30 degrees. In this case, 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 introduced into the yarn tube. Combined with the change in the diameter of the yarn tube, it can be determined that a winding fault has occurred. The winding fault can be further judged to prevent wrong judgments and improve the accuracy of fault detection.

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

[0040] In order to promptly handle the electronic yarn guide device with yarn winding failure, the present embodiment not only sends an alarm to remind the staff of the failure when the device is found to have winding failure, but also generates a corresponding alarm signal based on the detected information to assist the staff to promptly lock the failed electronic yarn guide device, wherein the locking can be performed through the spindle position coding, where one spindle position controls one electronic yarn guide device, and the spindle position coding and the electronic yarn guide device have a one-to-one correspondence, which can facilitate the staff to quickly lock the failed device and handle it in time; at the same time, when a failure occurs, the device is shut down in time to prevent the winding motor or the yarn guide motor from getting stuck and causing damage to the equipment, thereby increasing economic losses and causing safety hazards.

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

[0042] In order to determine some operating parameters of equipment such as the winding motor, the yarn guide motor and the yarn guide, this embodiment can infer the operating parameters of the above-mentioned equipment through some data in the product parameters. For example, the winding motor can maintain a uniform rotation during the yarn guiding process, the movement range of the yarn guide is the target height of the yarn bobbin, and the rotation speed of the yarn guide motor determines the yarn density, etc. Some required data in fault detection can be inferred, which can reduce the use of sensors and reduce the detection cost.

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

[0044] In this embodiment, since the diameter of the yarn bobbin gradually increases with the change of production time, and the larger the diameter of the yarn bobbin, the smaller the change of the diameter within a certain time range, therefore, when selecting the time interval T, in order to prevent the difference in the diameters of the yarn bobbins collected before and after the collection point from being too small to be difficult to identify, the yarn bobbin diameter range is divided into three ranges: small diameter, medium diameter and large diameter, which may include but are 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 subject to feedback from the detected yarn bobbin diameter and is adjusted according to the range of the yarn bobbin diameter. Selecting a suitable time interval T for collecting yarn bobbins can effectively prevent the yarn bobbin from changing obviously due to the time interval T being too small, thereby affecting the accuracy of fault detection.

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

[0046] In order to realize winding fault detection with the detection sensor of the electronic yarn guide device, the present embodiment obtains the winding speed of the winding motor in the electronic yarn guide device by determining the production demand before producing the yarn tube, and obtains the distance between the yarn and the center of the yarn tube at each moment by analyzing the winding speed and the transmission speed of the yarn, and then obtains the diameter of the yarn tube by analyzing the distance between the yarn and the center of the yarn tube at each moment according to the movement cycle of the yarn guide. During the winding process of the yarn tube, the diameter of the yarn tube will inevitably increase gradually with time. Therefore, if a winding fault occurs, the diameter of the yarn tube calculated by the yarn transmission speed will inevitably be affected. If the yarn is wound around the connecting rod between the winding motor and the yarn tube, and the thickness of the connecting rod is much smaller than the diameter of the yarn tube When the yarn is wound onto the connecting rod, the detected yarn tube diameter will be significantly smaller than that on the yarn tube. At this time, it can be preliminarily determined that a winding fault has occurred, but further analysis is needed to determine the fault. If the yarn is wound onto the yarn tube normally, the deviation angle formed by the yarn between the yarn guide and the yarn tube and the horizontal plane where the yarn guide is located will fluctuate within a smaller range. If a winding fault occurs, the yarn guide cannot correctly transmit the yarn to the yarn tube during movement, and the yarn is wound onto the connecting rod. As the yarn guide moves away from the yarn tube, the deviation angle will become smaller and smaller, which is obviously beyond the normal deviation angle range. Therefore, combined with the change in the yarn tube diameter, it can be determined that a winding fault has occurred. No additional detection device needs to be added to complete fault detection, which greatly reduces the detection cost.

[0047] It can be seen from the above embodiments that at least the following substantial effects are achieved: The present invention obtains the diameter of the yarn bobbin based on the winding speed of the winding motor and the yarn guiding speed of the yarn guiding motor, collects the diameter of the yarn bobbin at a certain time interval, analyzes the collected yarn bobbin diameter to obtain the time period when the fault occurs, and then analyzes the deviation angle in the time period to determine whether a winding fault occurs. Fault detection can be completed by using the sensor provided by 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 implementation described above is a preferred implementation of a winding fault detection method for an electronic yarn guide device of the present invention, and is not intended to limit the specific implementation scope of the present invention. The scope of the present invention includes but is not limited to this specific implementation. 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 of an electronic yarn guide device, applicable to an electronic yarn guide device, the electronic yarn guide device comprising: A winding motor, used for winding the yarn to form a yarn bobbin; The yarn guide performs periodic reciprocating motion to accurately introduce the yarn into the bobbin; A yarn guide motor, used for transferring the yarn into the yarn guide; Single spindle control system, used to control the corresponding electronic yarn guide device according to the spindle position code; It is characterized by comprising the following steps: S1. Obtain product parameters of the yarn bobbin based on production requirements, and obtain the winding speed of the winding motor and the movement cycle of the yarn guide based on the product parameters; S2, detecting the transmission speed of the yarn, and obtaining the diameter of the yarn tube based on the transmission speed, the movement cycle of the yarn guide and the winding speed; S3, collecting the diameter of the yarn tube at the same time interval T, and constructing the diameter change area of ​​the yarn tube diameter in the time domain; segmenting the diameter change area based on the collection points to obtain segmented sub-areas, obtaining the difference in the yarn tube diameter collected by the collection points at the upper and lower boundaries of each segmented sub-area, and if the difference is less than or equal to 0, the segmented sub-area is used as the target segmented sub-area; S4. Detecting 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-area. If the deviation angle is less than or equal to a preset threshold, it is determined that a winding fault occurs and an alarm signal is sent.

2. A method for detecting winding faults of an electronic yarn guide device according to claim 1, characterized in that: In S2, the transmission speed of the yarn is detected, and the diameter of the yarn tube is obtained based on the transmission speed, the movement cycle of the yarn guide and the winding speed, including the following steps: Obtaining a yarn guide speed of a yarn guide motor, and obtaining a transmission speed of the yarn based on the yarn guide speed; In each cycle of the yarn guide's reciprocating motion, the winding speed and the transmission speed at each moment are obtained; Based on the winding speed and transmission speed at each moment, the distance between the yarn tube surface and the yarn tube center at each moment is obtained, and the average value of the distance between the yarn tube surface and the yarn tube center at each moment is calculated to obtain the yarn tube diameter.

3. The method for detecting winding fault of an electronic yarn guide device according to claim 1, characterized in that: In S3, the yarn tube diameters are collected at the same time interval T, and the yarn tube diameter change area in the time domain is constructed, including the following steps: A Cartesian coordinate system is constructed with time as the horizontal axis and the yarn bobbin diameter as the vertical axis, and the area constructed by the yarn bobbin diameter in the time dimension is the yarn bobbin diameter change area.

4. The method for detecting winding fault of an electronic yarn guide device according to claim 1, characterized in that: In S3, the bobbin diameter change area is segmented based on the collection points to obtain segmented sub-areas, and the difference in bobbin diameters collected by the collection points at the upper and lower boundaries of each segmented sub-area is obtained. If the difference is less than or equal to 0, the segmented sub-area is used as the target segmented sub-area, including the following steps: Obtain the time at which the collection point is located, and number the collection point based on the time of the collection point; The barrel diameter change area is segmented based on the time instants of the adjacent numbered acquisition points to obtain segmented sub-areas; The difference in yarn bobbin diameters collected by the upstream and downstream collection points with adjacent numbers in the segmented sub-region is obtained. If the difference is less than or equal to 0, the segmented sub-region is used as the target segmented sub-region, and the target segmented sub-region is marked by the number of the collection point.

5. The method for detecting winding fault of an electronic yarn guide device according to claim 1, characterized in that: In S4, the deviation angle between the yarn between the yarn guide and the yarn tube and the horizontal plane where the yarn guide is located is detected in the target segmented sub-area. If the deviation angle is less than or equal to a preset threshold, it is determined that a winding fault occurs and an alarm signal is sent, including the following steps: Real-time detection of the deviation angle between the yarn between the yarn guide and the yarn tube and the horizontal plane where the yarn guide is located, and construction of the angle change area of ​​the deviation angle in the time domain; The deviation angle within the angle change area where the target segmentation sub-area is located is obtained. If the deviation angle is less than or equal to the preset threshold, it is determined that a winding fault has occurred. The detected information is integrated to generate an operation log and an alarm signal is sent.

6. A method for detecting winding faults of an electronic yarn guide device according to claim 1 or 5, characterized in that: The alarm signal at least includes a spindle position code, a shutdown control signal and a fault occurrence time period.

7. A method for detecting winding faults of an electronic yarn guide device according to claim 1, characterized in that: The product parameters at least include yarn type, yarn tube target height, yarn tube target diameter, yarn density and production process.

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

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