Detection system and detection method for circular knitting machine needle cylinder

Abstract

The invention relates to the technical field of circular knitting machine needle cylinder detection, and discloses a detection system and method for a circular knitting machine needle cylinder, and the system comprises an acquisition module which is used for collecting a needle groove image of the circular knitting machine needle cylinder, resistance data of resistance detection, and temperature data and vibration data of operation; the processing module is used for processing the needle groove image and determining the size and the wear degree of the needle groove; a corresponding insertion sheet is selected for resistance detection; the wear degree is adjusted according to the resistance data to obtain the final wear degree; the resistance detection module is used for carrying out resistance detection on the needle groove according to the insert selected by the processing module; and the judgment module is used for judging whether each needle groove in the circular knitting machine needle cylinder is qualified or not according to the final wear degree, the temperature data and the vibration data. According to the invention, multi-aspect detection is carried out on the needle cylinder of the circular knitting machine, the detection efficiency and accuracy are improved, and a scientific basis is provided for preventive maintenance of equipment.

Description

Technical Field

[0001] The invention relates to the technical field of circular knitting machine needle cylinder detection, and in particular to a detection system and a detection method for a circular knitting machine needle cylinder. Background Art

[0002] As an important part of knitting equipment, the quality of the circular knitting machine needle cylinder directly affects the production efficiency and product quality of knitted products. However, traditional methods are mostly implemented manually, such as using a vernier caliper to detect the width and depth of the needle groove of the circular knitting machine needle cylinder or using clockwise to feel the smoothness of the needle groove of the circular knitting machine needle cylinder. This detection method often has problems such as low detection efficiency and insufficient accuracy, and cannot meet the requirements of modern production for high efficiency and high quality. Therefore, it is of great practical significance to develop an efficient and accurate circular knitting machine needle cylinder detection system and detection method. Summary of the invention

[0003] The purpose of the present invention is to provide a detection system and method for a large circular knitting machine needle cylinder, so as to solve the problems that traditional detection methods often have low detection efficiency and insufficient accuracy, and cannot meet the requirements of modern production for high efficiency and high quality.

[0004] The present invention provides a detection system for a needle cylinder of a large circular knitting machine, the system comprising: An acquisition module, used for acquiring the needle groove image of the circular knitting machine needle cylinder and the resistance data when performing needle groove resistance detection, and the acquisition module is also used for acquiring the temperature data and vibration data of the circular knitting machine needle cylinder during operation; A processing module is connected to the acquisition module, and is used to process the needle groove image to determine the size and wear degree of each needle groove in the needle cylinder of the large circular knitting machine; select a corresponding insert according to the size of each needle groove to perform resistance detection; and adjust the wear degree according to the resistance data to obtain a final wear degree; A resistance detection module, connected to the acquisition module and the processing module, and used for controlling the insert sheet to be inserted into the needle groove of the needle cylinder of the large circular knitting machine according to the insert sheet selected by the processing module, so as to perform resistance detection on the needle groove; A determination module is connected to the processing module, and is used to determine whether each needle groove in the needle cylinder of the large circular knitting machine is qualified according to the final wear degree, temperature data and vibration data.

[0005] Preferably, the processing module is used to process the needle groove image to determine the size of each needle groove in the needle cylinder of the circular knitting machine, including: grayscale the needle groove image to convert the needle groove image into a grayscale image; Performing binarization processing on the grayscale image to convert the grayscale image into a binary image; Detecting the binary image to determine the boundary of the needle groove in the binary image; The size of the needle groove is obtained according to the determined needle groove boundary.

[0006] Preferably, the processing module is used to process the needle groove image to determine the wear degree of each needle groove in the needle cylinder of the circular knitting machine, including: Acquire a standard needle slot image, where the standard needle slot image is an image of a needle slot that is not put into use; Comparing the needle groove image with the standard needle groove image to determine a difference image, wherein the difference image is determined according to the RGB value of each pixel in the needle groove image and the RGB value of the standard needle groove image; Determine the wear degree of each needle groove in the needle cylinder of the circular knitting machine according to the difference image; Wherein, the wear degree is calculated according to the following formula: , M represents the degree of wear, m represents the length of the difference image in pixels, and n represents the width of the difference image in pixels. , , represents the red, green, and blue values ​​of the m-th pixel in the x-th row in the difference image, and C represents the influencing factor of wear.

[0007] Preferably, the processing module is used to adjust the wear degree according to the resistance data to obtain the final wear degree, including: A number of resistance value ranges are set, each of which corresponds to a unique adjustment coefficient. The corresponding adjustment coefficient is determined according to the resistance value range in which the resistance data is located, and the wear degree is adjusted according to the adjustment coefficient to obtain a final wear degree.

[0008] Preferably, the determination module is used to determine whether each needle groove in the needle cylinder of the circular knitting machine is qualified according to the final wear degree, temperature data and vibration data, including: Pre-set wear threshold; Comparing the final wear degree with the wear degree threshold, and determining whether the needle groove of the needle cylinder of the circular knitting machine is qualified according to the comparison result; If the needle groove of the needle cylinder of the large circular knitting machine is unqualified, the needle groove is marked as a needle groove to be repaired.

[0009] Preferably, the determination module is used to determine whether each needle groove in the needle cylinder of the circular knitting machine is qualified according to the final wear degree, temperature data and vibration data, and also includes: The vibration data includes vibration frequency and vibration amplitude; Pre-set temperature threshold, vibration frequency threshold and vibration amplitude threshold; The temperature data is compared with the temperature threshold, the vibration frequency is compared with the vibration frequency threshold, and the vibration amplitude is compared with the vibration amplitude threshold, and whether the needle slot is qualified is determined according to the comparison result.

[0010] Preferably, the determination module is used to determine whether each needle groove in the needle cylinder of the circular knitting machine is qualified according to the final wear degree, temperature data and vibration data, and also includes: Determine the temperature change rate, vibration frequency change rate and vibration amplitude change rate of the temperature data at time t relative to time t-1; Presetting a temperature change rate threshold, a vibration frequency change rate threshold, and a vibration amplitude change rate threshold; The temperature change rate is compared with the temperature change rate threshold, the vibration frequency change rate is compared with the vibration frequency change rate threshold, and the vibration amplitude change rate is compared with the vibration amplitude change rate threshold, and whether the needle slot secondary determination is qualified is determined based on the comparison results.

[0011] Preferably, after the determination module calibrates the needle slot as a needle slot to be repaired, the method further includes: Determine the position information of the needle slot to be repaired; The maintenance information of the needle slot is sent to the management machine of the needle cylinder of the large circular knitting machine, and the maintenance information includes the position information of the needle slot to be repaired.

[0012] The present invention also discloses a detection method for a circular knitting machine needle cylinder, which is applied to the above-mentioned detection system for a circular knitting machine needle cylinder. The method comprises: Collect the needle groove image of the circular knitting machine needle cylinder and the temperature and vibration data of the circular knitting machine needle cylinder during operation; Processing the needle groove image, determining the size and wear of each needle groove in the needle cylinder of the circular knitting machine, and selecting a corresponding insert according to the size of each needle groove to perform resistance detection; Collecting resistance data when testing the resistance of the needle groove of the needle cylinder of the large circular knitting machine, adjusting the wear degree according to the resistance data, and obtaining a final wear degree; Whether each needle groove in the needle cylinder of the circular knitting machine is qualified is determined based on the final wear degree, temperature data and vibration data.

[0013] Compared with the prior art, the beneficial effect of the present invention is that the present invention can detect the needle cylinder of the large circular knitting machine from multiple aspects by collecting needle groove images, temperature data and vibration data, ensuring a comprehensive understanding of its condition. It not only improves the efficiency and accuracy of the detection, but also provides a scientific basis for the preventive maintenance of the equipment, greatly reduces the production losses caused by equipment problems, and has a high practical value. The present invention can more accurately evaluate the condition of the needle groove and improve the reliability of the detection results by processing the needle groove image and detecting the resistance, combined with the comprehensive judgment of temperature and vibration data. The present invention also provides a resistance detection module, which can select the corresponding insert for resistance detection according to the size of each needle groove, so that the detection is more targeted and can more accurately evaluate the wear of each needle groove. Through strict detection and secondary judgment, the present invention ensures that each needle groove in the needle cylinder of the large circular knitting machine meets the quality requirements, thereby improving the overall quality and stability of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0015] Figure 1 It is a functional block diagram of a detection system for a needle cylinder of a circular knitting machine according to the present invention; Figure 2 The present invention is a schematic flow chart of a method for detecting a needle cylinder of a large circular knitting machine. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0017] like Figure 1 As shown, the present invention provides a detection system for a large circular knitting machine needle cylinder, the system comprising: The acquisition module is used to acquire the needle groove image of the circular knitting machine needle cylinder and the resistance data when performing needle groove resistance detection. The acquisition module is also used to acquire the temperature data and vibration data of the circular knitting machine needle cylinder during operation.

[0018] A processing module is connected to the acquisition module, and is used to process the needle groove image to determine the size and wear of each needle groove in the needle cylinder of the large circular knitting machine; select a corresponding insert according to the size of each needle groove to perform resistance detection; and adjust the wear according to the resistance data to obtain a final wear.

[0019] The resistance detection module is connected to the acquisition module and the processing module. The resistance detection module is used to control the insertion of the insert into the needle groove of the needle cylinder of the large circular knitting machine according to the insert selected by the processing module, and perform resistance detection on the needle groove.

[0020] A determination module is connected to the processing module, and is used to determine whether each needle groove in the needle cylinder of the large circular knitting machine is qualified according to the final wear degree, temperature data and vibration data.

[0021] In this embodiment, the present invention mainly provides a detection system for a large circular knitting machine needle cylinder, which has a high level of intelligence and automation and can comprehensively detect and evaluate various performance indicators of the large circular knitting machine needle cylinder. The system mainly includes the following parts: The acquisition module, the main function of this module is to collect various data of the circular knitting machine needle cylinder. First, it can obtain the needle groove image of the circular knitting machine needle cylinder through image acquisition technology, so that the system can have an intuitive understanding of the condition of the needle groove. Secondly, it can also collect resistance data during the resistance detection process, which is crucial for evaluating the wear condition of the needle groove. In addition, it can also collect temperature data and vibration data in real time during the operation of the needle cylinder, which can help the system better understand the operation condition of the needle cylinder.

[0022] Processing module, the main function of this module is to process the collected data to determine the size and wear of each needle groove in the needle cylinder of the large circular knitting machine. First, it can process the needle groove image to obtain more accurate size information. Then, according to the size of each needle groove, it can intelligently select the corresponding insert for resistance detection. Finally, according to the resistance data, it can adjust the wear degree to obtain the final wear degree.

[0023] The resistance detection module, the main function of this module is to control the insertion of the plug into the needle slot of the large circular knitting machine needle cylinder according to the plug selected by the processing module, and to detect the resistance of the needle slot. In this application, the use of the plug for resistance detection belongs to the existing method. A force sensor is set on the resistance detection module, and the resistance of the needle slot in the large circular knitting machine needle cylinder is determined by detecting the force of inserting the plug into the needle slot (when the plug is used for resistance detection, the plug is connected to the force sensor, and the force when the plug is inserted can be detected by the force sensor to determine the resistance received). In this way, more accurate resistance data can be obtained through actual operation for further analysis and processing by the processing module.

[0024] The main function of the judgment module is to judge whether each needle groove in the needle cylinder of the large circular knitting machine is qualified according to the final wear degree. If the needle groove is judged to be qualified, a secondary judgment is required based on the temperature data and vibration data. If the secondary judgment is also qualified, then it can be determined that the needle groove detection is qualified.

[0025] In general, the detection system provided by the present invention can comprehensively, accurately and efficiently detect the needle cylinder of the large circular knitting machine, improve production efficiency, reduce production costs, and has high practical value and promotion value.

[0026] Preferably, the processing module is used to process the needle groove image to determine the size of each needle groove in the needle cylinder of the large circular knitting machine, including: grayscale processing the needle groove image to convert the needle groove image into a grayscale image; binarization processing the grayscale image to convert the grayscale image into a binary image; detecting the binary image to determine the boundary of the needle groove in the binary image; and obtaining the size of the needle groove based on the determined needle groove boundary.

[0027] In this embodiment, the processing module determines the specific size of each needle groove in the needle cylinder of the large circular knitting machine. It includes: graying the original needle groove image, that is, converting the image from color mode to gray mode. Doing so can reduce the complexity of the image data, while retaining the most critical light and dark information in the image, which is helpful for subsequent processing steps. Next, the grayed image is binarized, that is, the gray value of each pixel in the image is set to 0 or 255, thereby converting the image into black and white. This step is to better highlight the needle groove part in the image so that it is easier to be identified in the subsequent detection steps. Then, the boundary detection is performed on the binarized image to determine the specific position of the needle groove in the image. This step is to identify and mark the outline of the needle groove through a series of algorithm operations, so as to obtain the boundary of the needle groove. Finally, according to the detected needle groove boundary, the specific size of the needle groove, such as length, width, etc., can be calculated. In general, through this series of image processing operations, the size of each needle groove in the needle cylinder of the large circular knitting machine can be effectively determined, thereby improving production efficiency and product quality.

[0028] Preferably, the processing module is used to process the needle groove image to determine the wear degree of each needle groove in the needle cylinder of the large circular knitting machine, including: obtaining a standard needle groove image; comparing the needle groove image with the standard needle groove image to determine a difference image, wherein the difference image is determined according to the RGB value of each pixel in the needle groove image and the RGB value of the standard needle groove image; determining the wear degree of each needle groove in the needle cylinder of the large circular knitting machine according to the difference image; Wherein, the wear degree is calculated according to the following formula: , M represents the degree of wear, m represents the length of the difference image in pixels, and n represents the width of the difference image in pixels. , , represents the red, green, and blue values ​​of the m-th pixel in the x-th row in the difference image, and C represents the influencing factor of wear.

[0029] Preferably, the standard needle slot image is a needle slot image of a needle slot that is not in use.

[0030] In this embodiment, the processing module mainly performs a series of processing operations on the needle groove image in order to accurately determine the degree of wear of each needle groove in the needle cylinder of the large circular knitting machine. First, a standard needle groove image is obtained, which refers to those needle groove images that have not been used as a reference. Next, the needle groove image to be processed is compared with the standard needle groove image, and through this comparison, a difference image can be determined. The generation of this difference image is based on the comparison of the RGB value of each pixel in the needle groove image and the RGB value of the corresponding pixel of the standard needle groove image. Finally, the degree of wear of each needle groove in the needle cylinder of the large circular knitting machine is judged based on this difference image. In this way, the wear of the needle groove can be quantitatively analyzed, thereby providing a basis for the maintenance and replacement of the equipment.

[0031] It can be understood that each pixel in the difference image is determined according to the following formula: ; ; ; in, , , Represents the red, green, and blue values ​​of the m-th pixel in the x-th row of the needle slot image. , , Represents the red, green, and blue values ​​of the m-th pixel in the x-th row of the standard needle slot image.

[0032] Preferably, the processing module is used to adjust the degree of wear according to the resistance data to obtain the final degree of wear, including: setting a number of resistance value ranges, each resistance value range corresponds to a unique adjustment coefficient, determining the corresponding adjustment coefficient according to the resistance value range in which the resistance data is located, and adjusting the degree of wear according to the adjustment coefficient to obtain the final degree of wear.

[0033] It is understandable that when the wear degree is adjusted according to the resistance data to obtain the final wear degree, it includes: presetting a first resistance value, a second resistance value and a third resistance value, wherein the first resistance value, the second resistance value and the third resistance value increase in sequence; selecting a corresponding adjustment coefficient according to the relationship between the resistance data and the first resistance value, the second resistance value and the third resistance value, adjusting the wear degree M to obtain the final wear degree; if the resistance data is less than the first resistance value, selecting the first adjustment coefficient a1 to adjust the wear degree M to obtain a final wear degree of M×a1; if the resistance data is greater than or equal to the first resistance value, the first adjustment coefficient a1 is selected to adjust the wear degree M to obtain a final wear degree of M×a1; first resistance value, and the resistance data is less than the second resistance value, then the second adjustment coefficient a2 is selected to adjust the wear degree M, and the final wear degree is M×a2; if the resistance data is greater than or equal to the second resistance value, and the resistance data is less than the third resistance value, then the third adjustment coefficient a3 is selected to adjust the wear degree M, and the final wear degree is M×a3; if the resistance data is greater than or equal to the third resistance value, then the fourth adjustment coefficient a4 is selected to adjust the wear degree M, and the final wear degree is M×a4; wherein, 1.0<a1<a2<a3<a4<1.2.

[0034] In this embodiment, during the operation of the circular knitting machine, the needle groove of the needle cylinder is constantly subjected to the up and down impact of the knitting needle and the friction of the yarn and the fabric. These long-term mechanical actions will cause the original smooth surface to gradually become rough, and may cause wear or collision marks. This wear not only affects the smoothness of the needle groove, but also may cause the fabric quality and production efficiency to decrease. At this time, when the insert is used for detection, the resistance will increase. When the needle groove is not worn, the insert can fit the smooth surface in the needle groove, so the resistance felt is small. When the needle groove is worn due to long-term use and mechanical wear, its internal surface will become rough and uneven, which causes the friction force of the insert to increase when inserted, thereby increasing the resistance. Therefore, the present application adjusts the wear degree by determining the relationship between the resistance data and the first resistance value, the second resistance value and the third resistance value, and then determining the corresponding adjustment coefficient.

[0035] It is understandable that, assuming there is a needle groove of a large circular knitting machine needle cylinder, its initial wear degree M=0.5. The collected resistance data is 0.8, which is less than the first resistance value 1, then the first adjustment coefficient a1=1.1 is selected, and the final wear degree after adjustment is 0.5×1.1=0.55. Assuming there is another needle groove, the wear degree M=0.6, the resistance data is 1.5, which is greater than or equal to the first resistance value 1 and less than the second resistance value 2, then the second adjustment coefficient a2=1.05 is selected, and the final wear degree after adjustment is 0.6×1.05=0.63.

[0036] Preferably, the determination module is used to determine whether each needle groove in the needle cylinder of the large circular knitting machine is qualified according to the final wear degree, including: presetting a wear degree threshold; comparing the final wear degree with the wear degree threshold, and determining whether the needle groove of the needle cylinder of the large circular knitting machine is qualified according to the comparison result; if the final wear degree is less than the wear degree threshold, then the needle groove of the needle cylinder of the large circular knitting machine is determined to be qualified; if the final wear degree is greater than or equal to the wear degree threshold, then the needle groove of the needle cylinder of the large circular knitting machine is determined to be unqualified, and the needle groove is marked as a needle groove to be repaired.

[0037] It is understandable that the judgment module is designed to evaluate whether each needle groove in the needle cylinder of the large circular knitting machine is qualified or not, and its working principle is to make judgments based on the preset wear threshold. In the actual operation process, the module will compare the final wear of each needle groove with the set wear threshold in detail. Through this comparison process, the judgment module can determine whether the quality of each needle groove meets the specified standard based on the comparison results of the wear. Specifically, if the final wear of a needle groove is lower than the wear threshold, the judgment module will determine that the quality of the needle groove is qualified; conversely, if the final wear of a needle groove is equal to or exceeds the wear threshold, the judgment module will determine that the quality of the needle groove does not meet the qualified standard. In this case, the judgment module will further operate and mark the unqualified needle groove as a needle groove to be repaired, so as to facilitate subsequent maintenance and repair work. Such a mechanism ensures the efficiency and stability of the use of the needle cylinder of the large circular knitting machine. Timely repair and maintenance can prevent equipment failures caused by excessive wear, thereby ensuring the continuity of the production process and the stability of product quality.

[0038] It can be seen that the efficiency and accuracy of needle groove quality assessment are significantly improved through automated wear detection and judgment. Compared with the traditional manual detection method, the automated judgment module can complete the wear evaluation of a large number of needle grooves in a short time, while avoiding the influence of human factors on the test results, making the evaluation results more objective and reliable. And it realizes real-time monitoring and early warning of needle groove wear. When the wear of the needle groove approaches or exceeds the threshold, the judgment module will immediately calibrate, so that the staff can find the problem in time and repair it. This timely maintenance and care can effectively prevent equipment failure caused by excessive wear of the needle groove, thereby ensuring the continuity of the production process and the stability of product quality. At the same time, it also improves the service life of the equipment and reduces the maintenance cost. Through timely repair and maintenance, the wear degree of the needle groove is effectively controlled, thereby extending the service life of the equipment. At the same time, due to the timely discovery and handling of problems, downtime losses and product quality problems caused by equipment failure are avoided, thereby reducing maintenance costs and production costs.

[0039] Preferably, the determination module is used for making a secondary determination on the needle slot according to the temperature data and the vibration data when determining that the needle slot is qualified, including: the vibration data includes a vibration frequency and a vibration amplitude; presetting a temperature threshold, a vibration frequency threshold and a vibration amplitude threshold; comparing the temperature data with the temperature threshold, comparing the vibration frequency with the vibration frequency threshold, and comparing the vibration amplitude with the vibration amplitude threshold, and determining whether the needle slot is secondary determined to be qualified based on the comparison result; if the temperature data is less than the temperature threshold, and the vibration frequency is less than the vibration frequency threshold, and the vibration amplitude is less than the vibration amplitude threshold, then determining that the needle slot secondary determination is initially qualified.

[0040] If the temperature data is greater than the temperature threshold, it is determined that the needle slot secondary judgment is unqualified; if the vibration frequency is greater than the vibration frequency threshold, it is determined that the needle slot secondary judgment is unqualified; if the vibration amplitude is greater than the vibration amplitude threshold, it is determined that the needle slot secondary judgment is unqualified.

[0041] In this embodiment, the main function of the determination module is to further evaluate the needle slot using the temperature data and vibration data after determining whether the needle slot meets the qualified standard. This evaluation process includes comprehensive consideration of vibration data (including vibration frequency and vibration amplitude). In order to perform this evaluation, a series of thresholds need to be pre-set, including temperature threshold, vibration frequency threshold and vibration amplitude threshold. In specific operation, the temperature data is compared with the preset temperature threshold, the vibration frequency is compared with the vibration frequency threshold, and the vibration amplitude is compared with the vibration amplitude threshold. Through these comparison results, it can be determined whether the needle slot meets the qualified standard of the secondary evaluation. If any temperature data exceeds the set temperature threshold, then it can be determined that the needle slot is unqualified in the secondary evaluation. Similarly, if the vibration frequency exceeds the vibration frequency threshold, or the vibration amplitude exceeds the vibration amplitude threshold, it is also determined that the needle slot is unqualified in the secondary evaluation. On the contrary, if all temperature data, vibration frequency and vibration amplitude are within the corresponding threshold range, then it can be determined that the needle slot is qualified in the secondary evaluation. After completing these determinations, if the needle slot is determined to be qualified in the secondary evaluation, it will continue to maintain the original evaluation state. However, if the needle slot is judged to be unqualified in the second assessment, it needs to be marked as a needle slot for repair so that appropriate repair measures can be taken to ensure that it can meet the prescribed usage standards. Overall, this process is designed to ensure the safety and reliability of the needle slot, thereby improving the performance of the overall equipment.

[0042] Preferably, the determination module is used to determine that the needle slot secondary determination is initially qualified, and further includes: determining the temperature change rate, vibration frequency change rate and vibration amplitude change rate of the temperature data at time t relative to time t-1; presetting the temperature change rate threshold, vibration frequency change rate threshold and vibration amplitude change rate threshold; comparing the temperature change rate with the temperature change rate threshold, comparing the vibration frequency change rate with the vibration frequency change rate threshold, comparing the vibration amplitude change rate with the vibration amplitude change rate threshold, and determining whether the needle slot secondary determination is qualified based on the comparison result. If the temperature change rate is less than the temperature change rate threshold, and the vibration frequency change rate is less than the vibration frequency change rate threshold, and the vibration amplitude change rate is less than the vibration amplitude change rate threshold, then it is determined that the needle slot secondary determination is qualified.

[0043] In this embodiment, the determination module further includes a series of activities on the basis of confirming that the needle slot secondary judgment is initially qualified. First, the module will determine the temperature change rate, vibration frequency change rate and vibration amplitude change rate of the temperature data of the needle slot between time t and the previous time t-1. The changes in these three indicators are important bases for judging the state of the needle slot. Next, the determination module will pre-set a series of thresholds, namely, the temperature change rate threshold, the vibration frequency change rate threshold and the vibration amplitude change rate threshold. The setting of these thresholds is based on the understanding of the normal working state of the needle slot and the accumulation of empirical data, and they will serve as a benchmark for judging whether the needle slot is qualified. Then, the determination module will compare the measured temperature change rate, vibration frequency change rate and vibration amplitude change rate with the corresponding thresholds respectively. This step is to determine whether the changes in these three indicators exceed the normal range, so as to evaluate whether there are potential problems with the needle slot. Finally, if the temperature change rate is less than the preset temperature change rate threshold, and the vibration frequency change rate is also less than the preset vibration frequency change rate threshold, and the vibration amplitude change rate is also less than the preset vibration amplitude change rate threshold, then the determination module will conclude that the needle slot secondary judgment is qualified. This means that the needle slot has maintained stability and reliability during operation without any abnormalities. Such a determination is of great significance for ensuring the normal operation of the needle slot and preventing potential failures.

[0044] Preferably, after the determination module calibrates the needle slot as a needle slot to be repaired, it also includes: determining the location information of the needle slot to be repaired; sending the maintenance information of the needle slot to the management machine of the large circular knitting machine needle cylinder, the maintenance information including the location information of the needle slot to be repaired.

[0045] The present invention also discloses a method for detecting a needle cylinder of a large circular knitting machine, such as Figure 2 As shown, the detection system for the needle cylinder of the circular knitting machine is applied to the above-mentioned method, and the method includes: S1, collecting the needle groove image of the circular knitting machine needle cylinder and the temperature data and vibration data of the circular knitting machine needle cylinder during operation.

[0046] S2, processing the needle groove image, determining the size and wear degree of each needle groove in the needle cylinder of the large circular knitting machine, and selecting a corresponding insert according to the size of each needle groove to perform resistance detection.

[0047] S3, collecting resistance data when testing the resistance of the needle groove of the needle cylinder of the large circular knitting machine, adjusting the wear degree according to the resistance data, and obtaining the final wear degree.

[0048] S4, judging whether each needle groove in the needle cylinder of the circular knitting machine is qualified according to the final wear degree, temperature data and vibration data.

[0049] It can be seen that by collecting the needle groove image of the large circular knitting machine needle cylinder and the temperature data and vibration data during operation, the working state of the needle cylinder can be comprehensively and accurately evaluated. In particular, in step S2, the size and wear of the needle groove are determined by image processing technology, and the corresponding insert is selected for resistance detection. This innovative method not only improves the accuracy of the detection, but also improves the detection efficiency. In step S3, the wear degree is adjusted using resistance data to further ensure the accuracy of the wear degree assessment. This feedback adjustment mechanism based on actual operating data makes the test results closer to the actual working conditions and improves the reliability of the test. In step S4, the needle groove is further evaluated through the final wear, temperature and vibration data to ensure the comprehensiveness and accuracy of the test results. This judgment method effectively avoids the misjudgment caused by single data and further improves the accuracy of the detection.

[0050] The detection method of the present invention has a high level of automation and intelligence, can realize fast and accurate detection of the needle cylinder of the large circular knitting machine, and greatly improves the production efficiency. Secondly, by collecting a variety of data, the detection method realizes a comprehensive evaluation of the working state of the needle cylinder, and provides strong data support for subsequent maintenance and servicing. Finally, the detection method is also scalable and customizable, and can be adjusted and optimized accordingly according to different detection requirements to meet the different needs of different users. In summary, the detection method for the needle cylinder of the large circular knitting machine of the present invention not only has a high degree of accuracy and reliability, but also has a high level of automation and intelligence, which provides strong technical support for the production of the textile industry.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solution of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the present invention.

[0052] The system provided in the above embodiment is only illustrated by the division of the above functional modules. In practical applications, the above functions can be assigned to different functional modules as needed, that is, the modules or steps in the embodiments of the present invention can be decomposed or combined. For example, the modules in the above embodiment can be combined into one module, or further divided into multiple sub-modules to complete all or part of the functions described above. The names of the modules and steps involved in the embodiments of the present invention are only for distinguishing the modules or steps, and are not regarded as improper limitations of the present invention.

[0053] Those skilled in the art should be able to appreciate that the modules and method steps of each example described in conjunction with the embodiments disclosed herein can be implemented with electronic hardware, computer software or a combination of the two, and the programs corresponding to the software modules and method steps can be placed in random access memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disks, removable disks, CD-ROMs, or any other form of storage medium known in the technical field. In order to clearly illustrate the interchangeability of electronic hardware and software, the composition and steps of each example have been generally described in the above description according to the function. Whether these functions are performed in electronic hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present invention.

Claims

1. A detection system for a large circular knitting machine needle cylinder, characterized in that: include: An acquisition module, used for acquiring the needle groove image of the circular knitting machine needle cylinder and the resistance data when performing needle groove resistance detection, and the acquisition module is also used for acquiring the temperature data and vibration data of the circular knitting machine needle cylinder during operation; A processing module is connected to the acquisition module, and is used to process the needle groove image to determine the size and wear degree of each needle groove in the needle cylinder of the large circular knitting machine; select a corresponding insert according to the size of each needle groove to perform resistance detection; and adjust the wear degree according to the resistance data to obtain a final wear degree; A resistance detection module, connected to the acquisition module and the processing module, and used for controlling the insert sheet to be inserted into the needle groove of the needle cylinder of the large circular knitting machine according to the insert sheet selected by the processing module, so as to perform resistance detection on the needle groove; A determination module connected to the processing module, the determination module is used to determine whether each needle groove in the needle cylinder of the large circular knitting machine is qualified according to the final wear degree, temperature data and vibration data; The processing module is used to process the needle groove image to determine the wear degree of each needle groove in the needle cylinder of the circular knitting machine, including: Acquire standard needle slot images; Comparing the needle groove image with the standard needle groove image to determine a difference image, wherein the difference image is determined according to the RGB value of each pixel in the needle groove image and the RGB value of the standard needle groove image; The wear degree of each needle groove in the needle cylinder of the circular knitting machine is determined according to the difference image.

2. The detection system for the needle cylinder of a circular knitting machine according to claim 1, characterized in that: The processing module is used to process the needle groove image to determine the size of each needle groove in the needle cylinder of the circular knitting machine, including: grayscale the needle groove image to convert the needle groove image into a grayscale image; Performing binarization processing on the grayscale image to convert the grayscale image into a binary image; Detecting the binary image to determine the boundary of the needle groove in the binary image; The size of the needle groove is obtained according to the determined needle groove boundary.

3. The detection system for the needle cylinder of a circular knitting machine according to claim 1, characterized in that: The standard needle slot image is an image of a needle slot that is not in use.

4. The detection system for the needle cylinder of a circular knitting machine according to claim 1, characterized in that: The processing module is used to adjust the wear degree according to the resistance data to obtain the final wear degree, including: A number of resistance value ranges are set, each of which corresponds to a unique adjustment coefficient. The corresponding adjustment coefficient is determined according to the resistance value range in which the resistance data is located, and the wear degree is adjusted according to the adjustment coefficient to obtain a final wear degree.

5. The detection system for the needle cylinder of a circular knitting machine according to claim 1, characterized in that: The determination module is used to determine whether each needle groove in the needle cylinder of the circular knitting machine is qualified according to the final wear degree, temperature data and vibration data, and includes: Pre-set wear threshold; Comparing the final wear degree with the wear degree threshold, and determining whether the needle groove of the needle cylinder of the circular knitting machine is qualified according to the comparison result; If the needle groove of the needle cylinder of the large circular knitting machine is unqualified, the needle groove is marked as a needle groove to be repaired.

6. The detection system for the needle cylinder of a circular knitting machine according to claim 5, characterized in that: The determination module is used to determine whether each needle groove in the needle cylinder of the circular knitting machine is qualified according to the final wear degree, temperature data and vibration data, and also includes: The vibration data includes vibration frequency and vibration amplitude; Pre-set temperature threshold, vibration frequency threshold and vibration amplitude threshold; The temperature data is compared with the temperature threshold, the vibration frequency is compared with the vibration frequency threshold, and the vibration amplitude is compared with the vibration amplitude threshold, and whether the needle slot is qualified is determined according to the comparison result.

7. The detection system for the needle cylinder of a circular knitting machine according to claim 6, characterized in that: The determination module is used to determine whether each needle groove in the needle cylinder of the circular knitting machine is qualified according to the final wear degree, temperature data and vibration data, and also includes: Determine the temperature change rate, vibration frequency change rate and vibration amplitude change rate of the temperature data at time t relative to time t-1; Presetting a temperature change rate threshold, a vibration frequency change rate threshold, and a vibration amplitude change rate threshold; The temperature change rate is compared with the temperature change rate threshold, the vibration frequency change rate is compared with the vibration frequency change rate threshold, and the vibration amplitude change rate is compared with the vibration amplitude change rate threshold, and whether the needle slot secondary determination is qualified is determined based on the comparison results.

8. The detection system for the needle cylinder of a circular knitting machine according to claim 5, characterized in that: When the determination module calibrates the needle slot as a needle slot to be repaired, the method further includes: Determine the position information of the needle slot to be repaired; The maintenance information of the needle slot is sent to the management machine of the needle cylinder of the large circular knitting machine, and the maintenance information includes the position information of the needle slot to be repaired.

9. A method for detecting a circular knitting machine needle cylinder, applied to the detection system for a circular knitting machine needle cylinder as claimed in any one of claims 1 to 8, characterized in that: The method comprises: Collect the needle groove image of the circular knitting machine needle cylinder and the temperature and vibration data of the circular knitting machine needle cylinder during operation; Processing the needle groove image, determining the size and wear of each needle groove in the needle cylinder of the circular knitting machine, and selecting a corresponding insert according to the size of each needle groove to perform resistance detection; Collecting resistance data when testing the resistance of the needle groove of the needle cylinder of the large circular knitting machine, adjusting the wear degree according to the resistance data, and obtaining a final wear degree; Whether each needle groove in the needle cylinder of the circular knitting machine is qualified is determined based on the final wear degree, temperature data and vibration data.

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