Nep detection mechanism for carding machine

Abstract

The utility model provides a nep detection mechanism for a carding machine, which comprises a housing part, a transmission part and a visual detection part, the housing part is arranged between a cylinder and a doffer of the carding machine, the transmission part is arranged in the housing part, the transmission part is provided with a linear module, a coupler and a servo motor which are connected in sequence, and the linear module is connected with the coupler. The visual detection part is installed on a moving platform of the linear module, and an arranged camera is driven by the linear module to shoot through a rectangular observation hole of the housing part. According to the nep detection mechanism for the carding machine, on the basis that the structure of the carding machine is not changed, the lens of the detection camera passes through the gap between the cylinder and the doffer to shoot passing cotton flow, and then shot pictures are analyzed through a background analysis system to judge whether neps exist or not.

Description

Technical Field

[0001] The utility model relates to a detection mechanism, in particular to a neps detection mechanism for a carding machine. Background Art

[0002] A carding machine opens, combs, and removes impurities from the cotton (fiber) roll sent by the previous process or the oiled cotton (chemical fiber) layer supplied by the cotton box, making all the curly cotton loops evenly mixed and becoming single fibers in a basically straight state. During this process, broken seeds, impurities, and short lint left over from the cotton cleaning process are removed, and then a cotton sliver of a certain specification is formed and stored in a cotton cylinder for use in the drawing process.

[0003] The quality of the final product of the carding machine, i.e., the cotton sliver, is an important indicator for evaluating the quality performance of the carding machine. Among them, the number of neps in the cotton sliver is one of the most important evaluation criteria for the quality of the cotton sliver. In the prior art, for the quality inspection of carded semi-finished products (roving), most manufacturers use the traditional visual inspection method to detect the nep and impurity content of semi-finished products and finished products in each textile process. Such an inspection method cannot fully and accurately reflect the number of neps.

[0004] Some carding machines (patent number: CN202310167952) are equipped with a detection mechanism for detecting the accumulation amount of defective cotton fibers on the cleaning roller. By detecting the accumulation amount of defective cotton fibers, the number of neps is judged. This detection method determines the number of neps generated by detecting the factor that generates neps, i.e., defective cotton fibers, rather than directly detecting the state of the textile in the carding machine. Therefore, it is only an indirect detection and cannot directly explain the number of neps. In recent years, with the development of computer vision technology, computer vision has also been applied to the work of detecting the quality of the carding web. The related patent CN201711335147 uses this method. However, the detection system of this utility model detects the finished cotton sliver, so it can only detect the state of the surface of the finished cotton sliver and cannot detect the internal situation of the cotton sliver. Moreover, this detection system is independent of the carding machine, with a complex structure, and requires separate installation and debugging, which is not convenient for textile factories to use. Summary of the Utility Model

[0005] The utility model provides a neps detection mechanism for a carding machine, which is used to solve many problems in the prior detection equipment regarding the detection of neps in a carding machine, such as complex structure, inconvenient application, and insufficiently direct and comprehensive detection. The technical solution is as follows:

[0006] A neps detection mechanism for a carding machine, comprising a housing component, a transmission component, and a vision detection component. The housing component is installed between the cylinder and the doffer of the carding machine, and the transmission component is installed inside. The transmission component is provided with a linear module, a coupling, and a servo motor connected in sequence. The vision detection component is installed on the moving platform of the linear module, and the set camera is driven by the linear module and takes pictures through the rectangular observation hole of the housing component.

[0007] The housing component includes a fixed housing and a glass plate. Both ends of the fixed housing are fixedly connected to the housing of the carding machine, and it is provided with a rectangular observation hole, and the glass plate is pasted inside the rectangular observation hole.

[0008] Both ends of the linear module are fixedly installed inside the fixed housing, and the servo motor is installed inside the fixed housing. The rotating shaft is connected to the input shaft of the linear module through a coupling.

[0009] The vision detection component includes a camera, a camera connecting plate, a lighting source, a camera adjustment block, and a camera adjustment screw. The camera is installed on the camera adjustment block and is adjusted by the camera adjustment screw. The camera adjustment block is installed on the camera connecting plate, and lighting sources are installed on both the left and right sides of the camera on the camera connecting plate.

[0010] The camera connecting plate includes a first connecting plate, a second connecting plate, a third connecting plate, and a fourth connecting plate. The bottoms of the first connecting plate and the second connecting plate are connected, and there is an angle between them. The first connecting plate is connected to the sliding platform on the linear module.

[0011] The left and right sides of the second connecting plate are respectively connected to the third connecting plate and the fourth connecting plate. The second connecting plate is provided with a camera adjustment block, and both the third connecting plate and the fourth connecting plate are provided with lighting sources.

[0012] The camera adopts a area array CCD camera, and the lighting source adopts an LED light source.

[0013] The rotation speed of the servo motor is related to the width of the cotton flow on the carding machine. When the vision detection component on the linear module makes a reciprocating motion according to the rotation speed of the servo motor, a complete cotton flow photo can be taken.

[0014] The cotton knot detection mechanism for the carding machine is installed on the outer shell of the carding machine, between the cylinder and the doffer. The detection mechanism mainly includes equipment such as a detection camera and a motor for driving the translation of the detection camera. The lens of the detection camera passes through the gap between the cylinder and the doffer to take pictures of the passing cotton flow, and then analyzes the taken pictures through the background analysis system to determine whether there are cotton knots. Due to the large width of the carding machine and the limited visual range of the detection camera, the lens of the detection camera needs to move back and forth continuously to take pictures in order to capture all the passing cotton flow. The analysis system is integrated in the upper computer of the carding machine control system and does not need to be set up separately. The detection mechanism of the present utility model is installed on the carding machine and is controlled and analyzed through the upper computer control system of the carding machine itself.

[0015] The beneficial effects of the present utility model are as follows: Without changing the structure of the carding machine, by adding an independent module for cotton knot detection, the on-line detection and evaluation of cotton knots in the carding machine are realized. The independent module directly takes pictures of the cotton flow state through a CCD detection camera and calculates the number of cotton knots. It makes a real-time evaluation of the quality of the sliver produced by the carding machine, can timely guide the operators to intervene in the production work of the carding machine, and reduce the number of cotton knots in the sliver. After measurement, after installing the detection mechanism of the present utility model, the number of cotton knots generated by the carding machine is reduced by 30-40% compared with that before installation. Description of the Drawings

[0016] Figure 1 is a schematic diagram of the installation position of the cotton knot detection mechanism for the carding machine;

[0017] Figure 2 is a schematic diagram of the structure of the cotton knot detection mechanism for the carding machine;

[0018] Figure 3 is a schematic diagram of the structure of the housing component;

[0019] Figure 4 is a schematic diagram of the structure of the transmission component;

[0020] Figure 5 is a schematic diagram of the structure of the visual detection component. Detailed Embodiments

[0021] As Figure 1 shown, the carding machine includes a cotton box 100, a feed roller 101, a licker-in 102, a cylinder 103, a doffer 104 and a sliver can 106 connected in sequence. Among them, the outer sides of the cotton box 100, the feed roller 101, the licker-in 102, the cylinder 103 and the doffer 104 are provided with an outer shell 105.

[0022] The nep detection mechanism 110 for a carding machine is installed on the wallboard of the carding machine housing 105, between the cylinder 103 and the doffer 104. The detection camera it is equipped with faces the gap between the cylinder and the doffer, and the camera passes through the gap to photograph the cotton flow passing above.

[0023] As Figure 2 As shown, the nep detection mechanism 110 for a carding machine includes a housing component 1, a transmission component 2, and a vision detection component 3. The housing component 1 is rectangular, and the housing component 1 is fixedly connected to the corresponding mounting holes of the carding machine housing 105 through the fixing holes at its left and right ends; the transmission component 2 is installed inside the housing component 1, and the left and right sides of the transmission component 2 are connected to the housing component 1 through screw holes; the vision detection component 3 is fixed on the transmission component 2.

[0024] As Figure 3 As shown, the housing component 1 includes a fixed shell 4, a glass plate 5, and an end cover 6. The fixed shell 4 is rectangular, and a rectangular observation hole (not shown in the figure) is opened on one of its faces, and the rectangular observation hole exactly corresponds to the position of the camera in the vision detection component 3. The glass plate 5 is pasted on the inner side of the rectangular observation hole to ensure the sealing of the entire nep detection structure. Screw holes are opened on the other planes of the outer side of the fixed shell 4, corresponding to the round holes on the end cover 6, and the two are connected and fixed by screws. The end cover 6 is in the shape of a flat plate, and the function of the end cover 6 is also to ensure the sealing of the overall structure and prevent sundries such as cotton fluffs in the air from entering the nep detection mechanism during the operation of the carding machine and affecting the detection. A sealing gasket is added between the fixed shell 4 and the end cover 6 during installation to ensure the sealing of the equipment of the present invention.

[0025] The housing component 1 has the following uses: (1) fixing the nep detection structure to the carding machine; (2) placing and fixing the transmission component 2 and the vision detection component 3 on the transmission component 2; (3) sealing and protecting the transmission component 2 and the vision detection component 3 from the influence of the environment.

[0026] As Figure 4 As shown, the transmission component 2 includes a linear module 7, a coupling 8, and a servo motor 9. The servo motor 9 is installed on the fixed shell 4, the rotating shaft of the servo motor 9 is connected to the coupling 8, and the other end of the coupling 8 is connected to the input shaft of the linear module 7. The left and right sides of the linear module 7 are connected to the housing component 1 through screw holes, and the moving platform on the linear module 7 is connected to the vision detection component 3.

[0027] The selection of the servo motor 9 is related to the width of the cotton flow on the carding machine. The appropriate rotation speed ensures that the vision detection component 3 on the linear module 7 can reciprocate at an appropriate speed and take a complete photo of the cotton flow through the rectangular observation hole.

[0028] As Figure 5 shown, the visual detection component 3 includes a camera 10, a camera connecting plate 11, a lighting source 12, a camera adjustment block 13, and a camera adjustment screw 14. The camera connecting plate 11 includes a first connecting plate, a second connecting plate, a third connecting plate, and a fourth connecting plate. The bottoms of the first connecting plate and the second connecting plate are connected, and there is an included angle between them. The first connecting plate is connected to the sliding platform on the linear module 7.

[0029] The left and right sides of the second connecting plate are respectively connected to the third connecting plate and the fourth connecting plate. The camera adjustment block 13 is provided on the second connecting plate. The camera 10 is fixed on the camera adjustment block 13. The camera 10 is a key component of the visual detection component and uses a area array CCD camera. By turning the camera adjustment screw 14, the shooting area of the camera can be finely adjusted to ensure that the positions of the images taken twice can be accurately spliced. The third connecting plate and the fourth connecting plate are both provided with lighting sources 12. The two groups of lighting sources 12 are pasted in pairs at the corresponding positions on both sides of the camera 10. The light source is an LED light source.

[0030] The working process of the nep detection mechanism provided by the present utility model is described below:

[0031] The present utility model is pre-assembled inside the carding machine, and the fixed shell 4 is connected and fixed to the wallboards on both sides of the carding machine housing 105. The lens of the camera 10 faces the observation hole on the fixed shell 4 and directly looks at the gap between the doffer and the cylinder of the carding machine, and can directly observe the cotton flow above the gap. The detection mechanism is controlled through the upper computer interface of the carding machine. When the nep detection mechanism starts to work, the servo motor 9 starts to be powered on and runs, drives the linear module 7 to move through the coupling 8, and the synchronous belt on the linear module 7 drives the visual detection component 3 fixed on the sliding platform of the linear module to move. When it runs to the set point 1, the motor stops, and the camera 10 takes a picture of the observed cotton flow. After taking the picture, the motor rotates in the reverse direction and comes to the set point 2 on the other side, and the motor also stops, and the camera 10 takes a picture. The pictures taken twice just cover the complete cotton flow width area. The above actions are repeated. Since the setting of the motor speed corresponds to the cotton flow velocity, it is ensured that the pictures taken twice at the same location can be completely spliced and corresponding before and after. By repeating this way, a complete cotton flow picture is ensured. The pictures taken by the camera are transmitted back to the detection and analysis system of the upper computer of the carding machine in real time. The analysis system analyzes the taken pictures at the same time, discriminates the positions and quantities of neps, and makes statistics. Through the real-time statistics of the nep quantity, the upper computer discriminates the production quality of the carding machine. When the nep quantity per unit time exceeds the set range, the upper computer gives an alarm, reminding the operator that there are more neps in the sliver produced by the carding machine at this time, and the residual cotton fibers on the cleaning roller should be removed in time or the mechanical structure should be appropriately adjusted to reduce the appearance of neps.

[0032] The beneficial effects of the present utility model are as follows: On the basis of not changing the structure of the carding machine, through adding an independent module for neps detection, the on-line detection and evaluation of neps in the carding machine are realized. The independent module directly photographs the state of the cotton stream through a CCD detection camera and calculates the number of neps. A real-time evaluation is made on the quality of the sliver produced by the carding machine, which can timely guide the operators to intervene in the production work of the carding machine and reduce the number of neps in the sliver. After measurement, after installing the detection mechanism of the present utility model, the number of neps generated by the carding machine is reduced by 30-40% compared with that before installation.

Claims

1. A nep detection mechanism for a carding machine, characterized in that: It includes a cover part, a transmission part and a visual detection part. The cover part is installed between the cylinder and the doffer of the cotton carding machine, and the transmission part is installed inside. The transmission part is provided with a linear module, a coupling and a servo motor connected in sequence. The visual detection part is installed on a moving platform of the linear module. The camera is driven by the linear module and takes pictures through the rectangular observation hole of the cover part.

2. The nep detection mechanism for a carding machine according to claim 1, characterized in that: The cover shell component comprises a fixed shell and a glass plate. Both ends of the fixed shell are fixedly connected to the outer shell of the cotton carding machine and are provided with a rectangular observation hole. The inner side of the rectangular observation hole is pasted with a glass plate.

3. The nep detection mechanism for a carding machine according to claim 2, characterized in that: Both ends of the linear module are fixedly mounted inside the fixed shell, the servo motor is mounted inside the fixed shell, and the rotating shaft is connected to the input shaft of the linear module through a coupling.

4. The nep detection mechanism for a carding machine according to claim 1, characterized in that: The visual detection component includes a camera, a camera connecting plate, an illumination light source, a camera adjustment block and a camera adjustment screw. The camera is installed on the camera adjustment block, and the camera is adjusted by the camera adjustment screw. The camera adjustment block is installed on the camera connecting plate, and illumination light sources installed on the camera connecting plate are arranged on the left and right sides of the camera.

5. The nep detection mechanism for a carding machine according to claim 4, characterized in that: The camera connecting plate includes a first connecting plate, a second connecting plate, a third connecting plate and a fourth connecting plate. The bottoms of the first connecting plate and the second connecting plate are connected, and there is an angle between them. The first connecting plate is connected to the sliding platform on the linear module.

6. The nep detection mechanism for a carding machine according to claim 5, characterized in that: The left and right sides of the second connecting plate are respectively connected to the third connecting plate and the fourth connecting plate, the second connecting plate is provided with a camera adjustment block, and the third connecting plate and the fourth connecting plate are both provided with an illumination light source.

7. The nep detection mechanism for a carding machine according to claim 6, characterized in that: The camera is a CCD camera, and the lighting source is an LED light source.

8. The nep detection mechanism for a carding machine according to claim 1, characterized in that: The rotation speed of the servo motor is related to the cotton flow width on the carding machine, and the visual detection component on the linear module can take a complete cotton flow photo when making reciprocating motion according to the rotation speed of the servo motor.

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