Broken needle positioning method and system for knitting machine

Abstract

The invention discloses a broken needle positioning method and system for a knitting machine, and the method comprises the steps: obtaining the state information of a knitting needle on the knitting machine, judging whether the broken needle appears or not, and transmitting a stopping instruction when the broken needle state of the knitting needle is obtained; after the stop instruction is sent out, an inching instruction is sent out to control a knitting needle on the knitting machine to operate at a low speed; according to operation of the knitting needle, pulse width information of the knitting needle is obtained in time; calculating the ratio information of the pulse width of the current knitting needle to the pulse width of the previous knitting needle, and if the ratio information is greater than a preset threshold value Y, determining that the position is a broken needle position. The problem that the position of a broken needle is difficult to accurately determine for replacement after the needle of an existing knitting machine is broken is solved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of knitting machines, and in particular to a broken needle positioning method system for knitting machines. Background Art

[0002] Circular knitting machines, scientifically known as circular weft knitting machines, have developed rapidly due to their multiple loop-forming systems, high speed, high output, fast pattern changes, good fabric quality, fewer processes, and strong product adaptability. Knitting needles are a major loop-forming component on knitting machines, used to weave yarn into coils and string the coils together to form knitted fabrics. The structure and shape of the knitting needles affect the knitting loop-forming process, the productivity of the knitting machine, and the quality of the product, and are an important basis for the design of knitting machines. Therefore, on existing knitting machines, knitting needle detectors are set to monitor in real time whether the knitting needles are broken or damaged.

[0003] Nowadays, there are a large number of knitting needles installed on knitting machines. Some knitting machines have thousands of knitting needles installed on their needle cylinders. Although the broken needles can be detected by the needle detector, the knitting machine runs too fast. When the needle detector detects the broken needle, when this information is transmitted to the server to start the stop command, the broken needle has moved to other positions, making it difficult for the staff to accurately determine the position of the broken needle, and thus difficult to quickly and accurately replace the broken needle. Summary of the invention

[0004] The purpose of the present invention is to provide a broken needle positioning method system for a knitting machine, which solves the problem that it is difficult to accurately determine the position of the broken needle for replacement after the broken needle occurs in the existing knitting machine.

[0005] To achieve the above-mentioned purpose, the first aspect of the present disclosure provides a broken needle positioning method for a knitting machine, comprising: Acquire the status information of the knitting needles on the knitting machine to determine whether the needles are broken, so as to issue a stop command when the status of the knitting needles being broken is acquired; After issuing a stop command, issue an inching command to control the knitting needles on the knitting machine to run slowly; According to the operation of the knitting needle, the pulse width information of the knitting needle is obtained instantly; The ratio information of the current knitting needle pulse width and the previous knitting needle pulse width is calculated. If the ratio information is greater than a preset threshold value Y, it is determined that this position is a broken needle position.

[0006] In some embodiments, the preset threshold Y is greater than 1.

[0007] In some embodiments, the preset threshold value Y=1+A; Here, A is a constant greater than 0.5 and less than 1.

[0008] In some embodiments, the positioning method further includes: After the broken needle position is determined, the knitting needles on the knitting machine continue to run slowly, and the current accumulated number of knitting needles is obtained in real time; According to the preset number of stop needles, the difference information between the preset number of stop needles and the accumulated number of knitting needles is determined, so as to issue a stop instruction according to the difference information, so that the broken needle stops at a specified position.

[0009] In some embodiments, when the difference information between the preset number of stop needles and the accumulated number of knitting needles is 0, a stop instruction is issued; If not, the knitting needles on the knitting machine continue to be controlled to run at a slow speed.

[0010] In some embodiments, the cumulative number of knitting needles=the number of knitting needles+1; The number of knitting needles is the number of pulses obtained by real-time operation of the knitting needles after the broken needle position is determined.

[0011] A second aspect of the present disclosure provides a broken needle positioning system for a knitting machine, which is used to implement the broken needle positioning method for a knitting machine according to any one of the above embodiments, comprising: A monitoring module, used for monitoring the status of knitting needles on the knitting machine and obtaining status information of the knitting needles on the knitting machine; A control module, used for controlling the operation of the knitting machine, so as to control the knitting machine to run normally, stop or jog according to the acquired state information of the knitting needles; An acquisition module is used to acquire the pulse width of the knitting needle when the knitting needle is running slowly under the inching instruction; The calculation module is used to calculate the ratio information of the current knitting needle pulse width and the previous knitting needle pulse width.

[0012] In some embodiments, the positioning device further comprises: The accumulation module is used to obtain the current accumulated number of knitting needles; The counting module is used to determine the difference information between the preset number of stop needles and the accumulated number of knitting needles according to the preset number of stop needles, so as to issue a stop instruction according to the difference information so that the broken needle stops at a specified position.

[0013] By adopting the above technical solution, when a broken needle is detected by the knitting needle detector, the above method can be used to effectively find the position of the broken needle and accurately locate the broken needle, so that the staff can accurately determine the position of the broken needle and quickly and accurately replace the broken needle to continue the subsequent knitting work.

[0014] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide further understanding of the present disclosure and constitute a part of the specification. They are used to explain the present disclosure together with the following detailed description, but do not constitute a limitation of the present disclosure.

[0016] In the attached picture: Figure 1 It is a schematic flow chart of a broken needle positioning method for a knitting machine provided by the present invention; Figure 2 It is a further schematic diagram of the process of the broken needle positioning method for a knitting machine provided by the present invention; Figure 3 It is a logic diagram of the broken needle positioning method for a knitting machine provided by the present invention; Figure 4 The invention is a block diagram of a broken needle positioning system for a knitting machine. DETAILED DESCRIPTION

[0017] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0018] The present invention provides a method for positioning a broken needle for a knitting machine. Figure 1 and Figure 3 As shown, the broken needle positioning method for a knitting machine includes the following steps.

[0019] S10, obtaining the status information of the knitting needles on the knitting machine, and determining whether the needles are broken, so as to issue a stop instruction when the status of the knitting needles being broken is obtained.

[0020] In step S10, the knitting needle detector can be used to monitor the running knitting needles in real time. When a broken needle occurs, the knitting needle detector can upload this information to the terminal or server in real time, so that a stop command can be issued in time and the presence of a broken needle can be determined.

[0021] S20, after issuing a stop command, an inching command is issued to control the knitting needles on the knitting machine to run slowly.

[0022] In step S20, a jog command is issued, and after the knitting needles on the knitting machine run slowly, the running speed of the knitting needles is relatively slowed down, which is convenient for accurately measuring the pulse width information of each knitting needle and also avoids the broken needle from moving quickly to other positions after the broken needle position is measured subsequently.

[0023] S30, according to the operation of the knitting needle, the pulse width information of the knitting needle is instantly obtained.

[0024] In step S30, a sensor may be used to detect the knitting needle pulse width information, for example, a photoelectric sensor may be used for monitoring. Specifically, the photoelectric sensor may be used to detect the time when two adjacent knitting needles pass through the position of the photoelectric sensor, thereby obtaining the knitting needle pulse width information. Of course, other sensors may also be used to detect the knitting needle pulse width information, as long as the knitting needle can be detected in real time, such as using an image sensor to determine the time when the knitting needle passes through the image sensor in the form of taking an image.

[0025] S40, calculating the ratio information of the current knitting needle pulse width and the previous knitting needle pulse width, and if the ratio information is greater than a preset threshold value Y, determining that this position is a broken needle position.

[0026] In step S40, when there is no needle breakage, the pulse width information of the knitting needle is consistent. When a needle breakage occurs, the photoelectric sensor will not detect the information of the broken needle, and continue to detect the next knitting needle, so that the knitting needle pulse width information at this time is large. In this way, if the ratio information of the current knitting needle pulse width and the previous knitting needle pulse width is greater than the preset threshold value Y, it means that there must be a broken needle at this position, so as to finally determine the position of the broken needle. If the ratio information is not greater than the preset threshold value Y, continue to repeat the above steps.

[0027] Among them, the above preset threshold Y is greater than 1.

[0028] Since the photoelectric sensor will not detect the information of the broken needle when a broken needle occurs, the needle pulse width information at this time is large. In this way, when the ratio of the current needle pulse width to the previous needle pulse width is greater than 1, it can be proved that a broken needle exists at this position.

[0029] Furthermore, the above preset threshold Y=1+A.

[0030] In the formula, A is a constant greater than 0.5 and less than 1.

[0031] When setting knitting needles in the needle cylinder of a knitting machine, the knitting needles may not be arranged evenly. Therefore, when there is no broken needle, the ratio information of the current knitting needle pulse width to the previous knitting needle pulse width may be slightly greater than 1, and even the ratio information may reach 1.1 or 1.2, but the ratio information will not be too large. Therefore, after the above-mentioned preset threshold value Y is set to this range and when the ratio information is greater than the preset threshold value Y, it is sufficient to indicate that there is a broken needle at this position.

[0032] In some embodiments, in combination Figure 2 and Figure 3 As shown, the above-mentioned broken needle positioning method for a knitting machine also includes the following steps.

[0033] S50, after the broken needle position is determined, the knitting needles on the knitting machine continue to run at a slow speed, and the current accumulated number of knitting needles is obtained in real time.

[0034] In step S50, the cumulative number of knitting needles is the cumulative number of knitting needles obtained by accumulating and calculating from 0 after the broken needle position is determined.

[0035] Among them, the cumulative number of knitting needles = the number of knitting needles + 1.

[0036] Wherein, the number of knitting needles is the number of pulses obtained by real-time operation of the knitting needles after the broken needle position is determined.

[0037] Specifically, after the broken needle position is determined by the pulse width information, the number of knitting needles is calculated. In this way, when the broken needle position is determined, the number of knitting needles is 0. Thereafter, each time a knitting needle is passed, the number of knitting needles is increased by one. Then, the corresponding number of knitting needles is increased by one to obtain the cumulative number of knitting needles.

[0038] It should be noted that a separate sensor can be used to count the number of knitting needles, such as setting a separate sensor on the knitting machine to detect the number of knitting needles passing through, such as setting a separate photoelectric sensor, or image sensor, so as to monitor the number of knitting needles passing through the photoelectric sensor or image sensor, and each time a knitting needle passes through the sensor, it can be counted accordingly. In addition, the above-mentioned sensor for detecting the pulse width of the knitting needles can also be used to count the knitting needles, so that the knitting needles can be counted and the cumulative number of knitting needles can be obtained. The specific method of calculating the number of knitting needles can be set according to needs.

[0039] S60, according to the preset number of stop needles, determining the difference information between the preset number of stop needles and the accumulated number of knitting needles, and issuing a stop instruction according to the difference information, so that the broken needle stops at a designated position.

[0040] In step S60, a needle gate is provided on the needle cylinder of the knitting machine where the knitting needles are installed, so that the knitting needles are set at the position of the needle gate. Accordingly, the sensor for detecting the knitting needles in the above step S50 is set to other positions of the knitting machine, with a certain interval from the position of the needle gate to avoid affecting the installation of the knitting needles. In this way, the sensor can be aligned with one of the knitting needles in the needle cylinder to detect the state of the knitting needles when the knitting machine is running. The above-mentioned preset stop needle number is the number of needles from the sensor to the needle gate, that is, the number of needles required for one of the knitting needles to move from the sensor to the needle gate. In this way, when the sensor is used to detect a broken needle, the number of knitting needles at this moment is 0, and the corresponding cumulative number of knitting needles is 1. After the preset stop needle number is subtracted from the cumulative pointer number, the position of the broken needle from the needle gate can be determined according to the difference obtained to accurately determine the position of the knitting needle.

[0041] Furthermore, when the difference between the preset number of stop needles and the accumulated number of knitting needles is 0, a stop command is issued; if not, the knitting needles on the knitting machine continue to be controlled to run at a slow speed.

[0042] In this way, when the difference information between the preset stop needle number and the cumulative knitting needle number is 0, it means that the detected broken needle has moved to the position of the needle gate. If the knitting machine is stopped at this time, it is convenient for the staff to replace the broken needle. For example, the preset stop needle number is 20, that is, the number of needles from the sensor to the needle gate is 20. In this way, when the broken needle is detected by detecting the pulse width, the number of knitting needles is 0 at this time. After that, the number of knitting needles increases by one for each needle. In this way, after 19 needles are run, the broken needle is only one needle away from the needle gate. Therefore, the cumulative number of knitting needles is obtained as the number of knitting needles + 1. After the difference information between the preset stop needle number and the cumulative number of knitting needles is 0, it can be determined that the broken needle has moved to the needle gate.

[0043] Based on the same technical concept, the present disclosure also provides a broken needle positioning system for a knitting machine, which is used to implement the broken needle positioning method for a knitting machine involved in the above-mentioned embodiment, such as Figure 4 As shown, the positioning device includes a monitoring module 210, which is used to monitor the state of the knitting needles on the knitting machine to obtain the state information of the knitting needles on the knitting machine; a control module 220, which is used to control the operation of the knitting machine, so as to control the normal operation, stop or jog operation of the knitting machine according to the obtained state information of the knitting needles; an acquisition module 230, which is used to obtain the pulse width of the knitting needles when the knitting needles are running slowly under the jog instruction; and a calculation module 240, which is used to calculate the ratio information of the current knitting needle pulse width to the previous knitting needle pulse width.

[0044] The calculation module 240 is further configured to calculate the ratio information of the current knitting needle pulse width to the previous knitting needle pulse width. If the ratio information is greater than a preset threshold value Y, the position is determined to be a broken needle position, and the preset threshold value Y=1+A.

[0045] Here, A is a constant greater than 0.5 and less than 1.

[0046] Furthermore, the above-mentioned broken needle positioning system for a knitting machine also includes an accumulation module 250, which is used to obtain the current accumulated number of knitting needles; a counting module 260, which is used to determine the difference information between the preset number of stop needles and the accumulated number of knitting needles according to the preset number of stop needles, so as to issue a stop instruction according to the difference information, so that the broken needle stops at a specified position.

[0047] By utilizing the above modules, the broken needle positioning method for a knitting machine in the above embodiments can be effectively implemented.

[0048] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0049] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0050] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A method for positioning a broken needle for a knitting machine, characterized in that: include: Acquire the status information of the knitting needles on the knitting machine to determine whether the needles are broken, so as to issue a stop command when the status of the knitting needles being broken is acquired; After issuing a stop command, issue an inching command to control the knitting needles on the knitting machine to run slowly; According to the operation of the knitting needle, the pulse width information of the knitting needle is obtained instantly; The ratio information of the current knitting needle pulse width and the previous knitting needle pulse width is calculated. If the ratio information is greater than a preset threshold value Y, it is determined that this position is a broken needle position.

2. The method for positioning a broken needle for a knitting machine according to claim 1, characterized in that: The preset threshold Y is greater than 1.

3. The method for positioning a broken needle for a knitting machine according to claim 2, characterized in that: The preset threshold value Y=1+A; Here, A is a constant greater than 0.5 and less than 1.

4. The method for positioning a broken needle for a knitting machine according to claim 3, characterized in that: The positioning method further includes: After the broken needle position is determined, the knitting needles on the knitting machine continue to run slowly, and the current accumulated number of knitting needles is obtained in real time; According to the preset number of stop needles, the difference information between the preset number of stop needles and the accumulated number of knitting needles is determined, so as to issue a stop instruction according to the difference information, so that the broken needle stops at a specified position.

5. The method for positioning a broken needle for a knitting machine according to claim 4, characterized in that: When the difference between the preset number of stop needles and the accumulated number of knitting needles is 0, issuing a stop command; If not, the knitting needles on the knitting machine continue to be controlled to run at a slow speed.

6. The method for positioning a broken needle for a knitting machine according to claim 5, characterized in that: The cumulative number of knitting needles = the number of knitting needles + 1; The number of knitting needles is the number of pulses obtained by real-time operation of the knitting needles after the broken needle position is determined.

7. A broken needle positioning system for a knitting machine, used for implementing the broken needle positioning method for a knitting machine as claimed in any one of claims 1 to 6, characterized in that: include: A monitoring module, used for monitoring the status of knitting needles on the knitting machine and obtaining status information of the knitting needles on the knitting machine; A control module, used for controlling the operation of the knitting machine, so as to control the knitting machine to run normally, stop or jog according to the acquired state information of the knitting needles; An acquisition module is used to acquire the pulse width of the knitting needle when the knitting needle is running slowly under the inching instruction; The calculation module is used to calculate the ratio information of the current knitting needle pulse width and the previous knitting needle pulse width.

8. The broken needle positioning system for a knitting machine according to claim 7, characterized in that: The positioning device also includes: The accumulation module is used to obtain the current accumulated number of knitting needles; The counting module is used to determine the difference information between the preset number of stop needles and the accumulated number of knitting needles according to the preset number of stop needles, so as to issue a stop instruction according to the difference information so that the broken needle stops at a specified position.

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