Broken yarn self-repairing system of circular knitting machine and circular knitting machine

Abstract

The embodiment of the invention provides a circular knitting machine broken yarn self-repairing system and a circular knitting machine, the system comprises a broken yarn detection module, the broken yarn detection module comprises optical fiber sensors and MEMS accelerometers, the optical fiber sensors and the MEMS accelerometers are distributed on the inner side and the outer side of a needle cylinder in a crossed mode, the optical fiber sensors are embedded in the inner wall of the needle cylinder, the distance between every two adjacent optical fiber sensors is L, and the distance between every two adjacent optical fiber sensors is L; the MEMS accelerometer is arranged on the outer wall of the needle cylinder, the projection of the MEMS accelerometer in the direction perpendicular to the outer wall of the needle cylinder falls between the adjacent optical fiber sensors, and the optical fiber sensors and the MEMS accelerometer form a broken yarn position coordinate system; the broken yarn capturing module is used for capturing broken yarns; the intelligent yarn threading module is used for threading the broken yarn captured by the broken yarn capturing module into a yarn guide, the system can rapidly repair the broken yarn, the tedious process of manual repair is avoided, and the working efficiency of the circular knitting machine is improved.

Description

Technical Field

[0001] The present application relates to the field of textiles, and in particular to a yarn break self-repair system for a circular knitting machine and a circular knitting machine. Background Art

[0002] In the field of knitting production, circular knitting machines have become the core equipment for large-scale production of knitted fabrics with their efficient and continuous production capabilities, and are widely used in many industries such as clothing, home textiles, and industrial textiles. During the operation of circular knitting machines, the stable supply of yarn and continuous weaving are the key to ensuring product quality and production efficiency.

[0003] At present, the industry research focuses mainly on the prevention of yarn breakage. However, in actual production, yarn breakage is difficult to avoid. Once the yarn breakage problem occurs, it will bring many negative impacts on production. On the one hand, yarn breakage will cause defects in the fabric being woven, such as holes, missing needles, etc. These defective products not only affect product quality, but also cause waste of raw materials. On the other hand, the staff needs to spend time and energy to stop the machine to find the location of the yarn breakage and repair it, which will undoubtedly reduce production efficiency and increase production costs.

[0004] Therefore, developing a system that can achieve self-repair of broken yarn is of great practical significance for improving the production efficiency of circular knitting machines, reducing costs and improving product quality. Summary of the invention

[0005] The present application provides a yarn break self-repair system for a circular knitting machine and a circular knitting machine. The system uses an optical fiber sensor and a MEMS accelerometer to determine the position of the broken yarn, captures the broken yarn through a broken yarn capture module, and an intelligent yarn threading module threads the broken yarn into a yarn guide, thereby avoiding the tedious process of manual repair and improving the working efficiency of the circular knitting machine.

[0006] In a first aspect, a yarn break self-repair system for a circular knitting machine is provided, the system comprising: a yarn break detection module, the yarn break detection module comprising an optical fiber sensor and a MEMS accelerometer cross-distributed on both sides of a syringe, the optical fiber sensor is embedded in the inner wall of the syringe, the distance between adjacent optical fiber sensors is L, the MEMS accelerometer is arranged on the outer wall of the syringe, the projection of the MEMS accelerometer in a direction perpendicular to the outer wall of the syringe falls between adjacent optical fiber sensors, and the optical fiber sensor and the MEMS accelerometer form a yarn break position coordinate system; a yarn break capture module, the yarn break capture module is used to capture the broken yarn; and an intelligent yarn threading module, the intelligent yarn threading module is used to thread the broken yarn captured by the yarn break capture module into a yarn guide.

[0007] It should be understood that the system distributes optical fiber sensors and MEMS accelerometers crosswise on the inner and outer sides of the needle cylinder. The inner wall optical fiber sensor detects the yarn state by detecting the change in light intensity when the yarn breaks, and the outer wall MEMS accelerometer is used to capture the mechanical vibration caused by the broken yarn, thereby reducing the detection blind area. In addition, a three-dimensional spatial encoding coordinate system is formed by cross-distribution, which can quickly determine the position of the broken yarn and improve the working efficiency of the circular knitting machine.

[0008] In combination with the first aspect, in certain implementations of the first aspect, the interval L between adjacent optical fiber sensors is in the range of [8, 12] cm.

[0009] It should be understood that when the spacing between optical fiber sensors is too small, the number of sensors will increase and the cost will rise; when the spacing between optical fiber sensors is too large, the detection blind area will expand.

[0010] In combination with the first aspect, in certain implementations of the first aspect, the distance between the optical fiber sensor and the inner wall of the syringe is d, the range of d is 0.1 mm to 0.3 mm, and the light spot coverage range of the optical fiber sensor is 1.1 to 1.3 times the yarn diameter.

[0011] It should be understood that the distance between the optical fiber sensor and the inner wall of the needle cylinder can be adjusted within a certain range, so as to adapt to irregular yarns. The optical fiber sensor's light spot covers 1.1 to 1.3 times the yarn diameter, which can ensure detection accuracy.

[0012] In combination with the first aspect, in certain implementations of the first aspect, the height of the MEMS accelerometer above the outer wall of the syringe is h, and h is 1 / 8 to 1 / 6 of the diameter of the syringe.

[0013] It should be understood that placing the MEMS accelerometer a proper distance above the outer wall of the needle cylinder can improve the efficiency of vibration signal transmission and also avoid interference with other components of the circular knitting machine.

[0014] In combination with the first aspect, in certain implementations of the first aspect, the optical fiber sensor is connected to the syringe via a piezoelectric ceramic micro-displacement stage, and can automatically adjust the distance d between the optical fiber sensor and the inner wall of the syringe according to the yarn count, with an adjustment accuracy of ±0.05mm.

[0015] In combination with the first aspect, in certain implementations of the first aspect, the broken yarn capture module includes: a micro negative pressure nozzle, which is used to absorb the broken yarn; and a flexible conveying pipe, which is connected to the micro negative pressure nozzle, and is used to convey the broken yarn to the intelligent yarn threading module.

[0016] In combination with the first aspect, in some implementations of the first aspect, the intelligent yarn threading module includes a yarn threading robot arm, which is used to thread the broken yarn into the yarn guide.

[0017] It should be understood that the yarn guide is a key component of the circular knitting machine. It can accurately guide the yarn so that it can enter the weaving area smoothly and steadily according to the established trajectory and requirements during the operation of the circular knitting machine. It provides a basic guarantee for the circular knitting machine to efficiently and stably weave various high-quality knitted fabrics, and plays an indispensable role in the entire knitting production process.

[0018] In combination with the first aspect, in some implementations of the first aspect, the system further includes a human-computer interaction terminal, and the human-computer interaction terminal displays a real-time broken yarn repair status.

[0019] In a second aspect, a circular knitting machine is provided, wherein the circular knitting machine is integrated with a yarn break self-repair system according to any implementation method of the first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic structural diagram of a self-repair system for a circular knitting machine provided in an embodiment of the present application.

[0021] Figure 2 A schematic diagram of the distribution of an optical fiber sensor and a MEMS accelerometer provided in an embodiment of the present application.

[0022] Figure 3 A side schematic diagram of the distribution of an optical fiber sensor and a MEMS accelerometer provided in an embodiment of the present application.

[0023] Figure 4 A schematic diagram of the structure of a broken yarn capturing module provided in an embodiment of the present application. DETAILED DESCRIPTION

[0024] The terms used in the following embodiments are only for the purpose of describing specific embodiments and are not intended to be limiting of the present application. As used in the specification and appended claims of the present application, the singular expressions "one", "a kind of", "", "above", "the" and "this" are intended to also include expressions such as "one or more", unless there is a clear contrary indication in the context. It should also be understood that in the following embodiments of the present application, "at least one", "one or more" refer to one, two or more. The term "and / or" is used to describe the association relationship of associated objects, indicating that three relationships may exist; for example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the objects associated before and after are in an "or" relationship.

[0025] References to "one embodiment" or "some embodiments" etc. described in this specification mean that a particular feature, structure or characteristic described in conjunction with the embodiment is included in one or more embodiments of the present application. Thus, the phrases "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear at different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0026] In the field of knitting production, circular knitting machines have become the core equipment for large-scale production of knitted fabrics with their efficient and continuous production capabilities, and are widely used in many industries such as clothing, home textiles, and industrial textiles. During the operation of circular knitting machines, the stable supply of yarn and continuous weaving are the key to ensuring product quality and production efficiency.

[0027] The embodiments of the present application provide a yarn break self-repair system for a circular knitting machine and a circular knitting machine, which can quickly determine the yarn break position and automatically complete the yarn break repair, thereby improving the working efficiency.

[0028] Figure 1 The present application provides a yarn break self-repair system for a circular knitting machine. In some examples, the system includes: a yarn break detection module 1, the yarn break detection module 1 includes an optical fiber sensor 11 and a MEMS accelerometer 12 cross-distributed on both sides of a needle cylinder 2;

[0029] A broken yarn capturing module 3, the broken yarn capturing module 3 is used to capture broken yarn;

[0030] An intelligent yarn threading module 4, which is used to thread the broken yarn captured by the broken yarn capturing module into the yarn guide;

[0031] The human-machine interaction terminal 5 displays the real-time broken yarn repair status.

[0032] In a possible implementation, the staff can check whether the circular knitting machine has yarn breakage through the human-machine interaction terminal 5. If the circular knitting machine has yarn breakage, the staff can further query the repair status.

[0033] Figure 2 and Figure 3It is a distribution diagram and side distribution diagram of a fiber optic sensor and a MEMS accelerometer provided in an embodiment of the present application. In some examples, the broken yarn detection module includes a fiber optic sensor and a MEMS accelerometer cross-distributed on both sides of the inner and outer sides of the syringe, the fiber optic sensor is embedded in the inner wall of the syringe, the spacing between adjacent fiber optic sensors is L, the MEMS accelerometer is arranged on the outer wall of the syringe, the projection of the MEMS accelerometer in a direction perpendicular to the outer wall of the syringe falls between adjacent fiber optic sensors, and the fiber optic sensor and the MEMS accelerometer form a broken yarn position coordinate system.

[0034] In a possible implementation, the optical fiber sensor and the MEMS accelerometer are spatially coded and positioned, and the breakpoint coordinates are calculated by triggering the sensor coding (such as the third optical fiber + the fourth MEMS), thereby locating the broken yarn position.

[0035] In some examples, the spacing L between adjacent optical fiber sensors is in the range of [8, 12] cm.

[0036] In some examples, the distance between the optical fiber sensor and the inner wall of the syringe is d, the range of d is 0.1 mm to 0.3 mm, and the light spot coverage range of the optical fiber sensor is 1.1 to 1.3 times the diameter of the yarn.

[0037] In some examples, the height of the MEMS accelerometer above the outer wall of the syringe is h, and h is 1 / 8 to 1 / 6 of the diameter of the syringe.

[0038] In some examples, the fiber sensor is connected to the syringe via a piezoelectric ceramic micro-displacement stage, which can automatically adjust the distance d between the fiber sensor and the inner wall of the syringe according to the yarn count, with an adjustment accuracy of ±0.05mm.

[0039] In a possible implementation, the logic of automatic adjustment includes:

[0040] S1: Input yarn count N m Calculate d as follows:

[0041] d=0.1+0.002×(100-N m ),

[0042] S2: Piezoelectric ceramic response time <10ms, displacement resolution 0.01mm.

[0043] refer to Figure 4 In some examples, the broken yarn capture module includes: a micro negative pressure nozzle, which is used to absorb the broken yarn; a flexible conveying pipe, which is connected to the micro negative pressure nozzle, and is used to convey the broken yarn to the intelligent yarn threading module.

[0044] In some examples, the intelligent yarn threading module includes a yarn threading robot arm, which is used to thread the broken yarn into the yarn guide.

[0045] In some examples, a circular knitting machine is provided, which integrates a yarn breakage self-repairing system according to any of the aforementioned methods.

[0046] The above are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above embodiments. Any equivalent modifications or changes made by ordinary technicians in this field based on the contents disclosed by the present invention should be included in the protection scope recorded in the claims.

Claims

1. A yarn break self-repair system for a circular knitting machine, characterized in that: The system comprises: A yarn break detection module (1), the yarn break detection module (1) comprising an optical fiber sensor (11) and a MEMS accelerometer (12) cross-distributed on both sides of the inner and outer sides of a needle cylinder (2), the optical fiber sensor (11) being embedded in the inner wall of the needle cylinder (2), the spacing between adjacent optical fiber sensors (11) being L, the MEMS accelerometer (12) being arranged on the outer wall of the needle cylinder (11), the projection of the MEMS accelerometer (12) in a direction perpendicular to the outer wall of the needle cylinder (2) falling between adjacent optical fiber sensors (11), and the optical fiber sensor (11) and the MEMS accelerometer (12) forming a yarn break position coordinate system; A broken yarn capturing module (3), wherein the broken yarn capturing module (3) is used to capture the broken yarn; An intelligent yarn threading module (4), the intelligent yarn threading module (4) being used for threading the broken yarn captured by the broken yarn capturing module into a yarn guide.

2. The system according to claim 1, characterized in that The interval L between adjacent optical fiber sensors (11) is in the range of [8, 12] cm.

3. The system according to claim 1, characterized in that The distance between the optical fiber sensor (11) and the inner wall of the needle cylinder (2) is d, and the range of d is 0.1 mm to 0.3 mm. The light spot coverage range of the optical fiber sensor (11) is 1.1 to 1.3 times the diameter of the yarn.

4. The system according to claim 1, characterized in that The height of the MEMS accelerometer (12) above the outer wall of the syringe (2) is h, and h is 1 / 8 to 1 / 6 of the diameter of the syringe (2).

5. The system according to claim 1, characterized in that The optical fiber sensor (11) is connected to the syringe (2) via a piezoelectric ceramic micro-displacement platform (111), and can automatically adjust the distance d between the optical fiber sensor (11) and the inner wall of the syringe (2) according to the yarn count, with an adjustment accuracy of ±0.05 mm.

6. The system according to claim 1, characterized in that The broken yarn capturing module (3) comprises: A micro negative pressure nozzle (31), wherein the micro negative pressure nozzle (31) is used to absorb the broken yarn; A flexible conveying pipe (32), wherein the flexible conveying pipe (32) is connected to the micro negative pressure nozzle (31), and the flexible conveying pipe (32) is used to convey the broken yarn to the intelligent yarn threading module (4).

7. The system according to claim 1, characterized in that The intelligent yarn threading module (4) comprises a yarn threading mechanical arm (41), and the yarn threading mechanical arm (41) is used to thread the broken yarn into the yarn guide.

8. The system according to claim 1, characterized in that The system further comprises a human-machine interaction terminal (5), wherein the human-machine interaction terminal (5) displays a real-time broken yarn repair status.

9. A circular knitting machine, characterized in that: Integrate the yarn breakage self-repairing system as described in any one of claims 1 to 9.

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