Yarn thickness detection sensor

Abstract

The utility model relates to the technical field of textile engineering, in particular to a yarn thickness detection sensor. The device comprises a frame body, the top of the frame body is fixedly connected with a fixing frame, the inner wall of the fixing frame is fixedly connected with a pressure sensor, the surface of the pressure sensor extends out of the inner wall of the fixing frame, the bottom of the frame body is fixedly connected with a supporting frame, and the inner wall of the frame body is provided with a yarn measuring assembly. A tension assembly is arranged on the inner wall of the fixing frame. Through cooperative work of the laser range finder and the pressure sensor, the diameter of the yarn can be accurately calculated by measuring the distance difference between light rays and the positions of the yarn and the pressure sensor, the requirement for high-precision detection of the diameter of the yarn in the production process is effectively met, and even if light signal interference caused by yarn density difference exists, the yarn diameter can be accurately detected. The device can still reduce the influence of density on a measurement result to a certain extent through a stable measurement principle.

Description

Technical Field

[0001] This utility model relates to the field of textile engineering technology, and more specifically, to a yarn thickness detection sensor. Background Technology

[0002] In textile production, the consistency of yarn thickness has a significant impact on product quality and production efficiency. From a quality perspective, uneven yarn thickness can lead to defects in fabrics, such as color variations and uneven textures. High-end fabrics have extremely high requirements for yarn thickness precision; even slight deviations can significantly reduce product grade and price. In terms of production efficiency, yarns of inconsistent thickness can easily cause jamming and breakage during textile machinery operation. Frequent downtime for maintenance not only wastes working hours but also increases equipment wear and tear and production costs. With yarn thickness sensors, yarn thickness can be monitored in real time. Once a deviation occurs, the system can adjust production parameters promptly, ensuring stable yarn quality, improving production efficiency, and reducing defect rates and equipment failures. Therefore, it plays an indispensable role in the textile industry.

[0003] Existing yarn sensors typically use a laser emitting device to emit a parallel and uniformly energetic laser beam when detecting yarn thickness. The sensitivity of the photodetector is adjusted to accurately capture even the slightest changes in light signal. A conveying device slowly guides the yarn into the laser beam scanning area at a constant speed. As the yarn passes through the laser beam, it blocks the beam. The photodetector, located opposite the laser emitting device, receives the light signal that is not blocked by the yarn. During the period when the yarn blocks the laser beam, the light intensity received by the photodetector decreases accordingly. A timing device in the detection system is activated simultaneously to accurately record the time from when the yarn begins to block the laser beam until it completely leaves the laser beam scanning area. This blocking time is used to calculate the yarn diameter.

[0004] However, when existing yarn sensors detect yarn, the yarn density will have a certain impact on the detection process. From the perspective of light signal obstruction, if the yarn density is higher, the difficulty of light penetration increases. Even for yarns of the same diameter, due to the dense internal fiber arrangement, the absorption and scattering of the laser beam are enhanced. The intensity of the unobstructed light signal received by the photodetector will be weaker than that in the case of low-density yarn. This may cause the detection system to misjudge that the yarn diameter is larger. Utility Model Content

[0005] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a yarn thickness detection sensor.

[0006] To achieve the above objectives, this utility model provides a yarn thickness detection sensor, including a frame body, a fixed frame fixedly connected to the top of the frame body, a pressure sensor fixedly connected to the inner wall of the fixed frame, the surface of the pressure sensor extending out of the inner wall of the fixed frame, a support frame fixedly connected to the bottom of the frame body, a yarn measuring component provided on the inner wall of the frame body, and a tension component provided on the inner wall of the fixed frame.

[0007] The yarn measuring component includes a protective frame fixedly connected to the inner wall of the frame body, and a laser rangefinder is fixedly connected to the inner wall of the protective frame.

[0008] As a further improvement to this technical solution, the laser rangefinder and the pressure sensor are located on the same horizontal line.

[0009] As a further improvement to this technical solution, a display screen is fixedly connected to the surface of the main frame, and the display screen is electrically connected to the laser rangefinder.

[0010] As a further improvement to this technical solution, the tension assembly includes two fixing plates fixedly connected to the inner wall of the fixing frame, and the two fixing plates are symmetrically distributed at both ends of the fixing frame;

[0011] The surface of the fixing plate is provided with a second thread hole.

[0012] As a further improvement to this technical solution, a connecting rod is fixedly connected to the top of the frame body, and a connecting plate is fixedly connected to the end of the connecting rod. A first through hole is opened on the surface of the connecting plate.

[0013] The connecting rods are two symmetrically distributed at the top of the main frame body;

[0014] The connecting plate is located above the fixing plate.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] This yarn thickness detection sensor, through the coordinated operation of a laser rangefinder and a pressure sensor, accurately calculates the yarn diameter by utilizing the distance difference between the measured light reaching the yarn and the pressure sensor. This effectively meets the high-precision yarn diameter detection requirements in the production process. Even when faced with light signal interference caused by differences in yarn density, the device can still reduce the impact of density on the measurement results to a certain extent through a stable measurement principle. At the same time, the tension component ensures that the yarn maintains tension throughout its continuous movement, preventing the yarn from deviating from the predetermined position due to slack or bending, thus ensuring the stability of the yarn throughout the entire detection process. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the yarn measuring component of this utility model;

[0019] Figure 3 This is an enlarged structural diagram of point A in this utility model;

[0020] Figure 4 This is a schematic diagram of the main frame structure of this utility model;

[0021] Figure 5 This is a schematic diagram of the laser rangefinder of this utility model.

[0022] The meanings of the labels in the diagram are as follows:

[0023] 1. Main frame; 10. Fixing frame; 11. Support frame; 12. Pressure sensor;

[0024] 2. Yarn measuring assembly; 21. Protective frame; 22. Laser rangefinder; 23. Display screen;

[0025] 3. Tension assembly; 31. Connecting rod; 32. Connecting plate; 320. First threading hole; 33. Fixing plate; 330. Second threading hole. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Example

[0028] Please see Figures 1-5 As shown, this embodiment provides a yarn thickness detection sensor, including a frame body 1, a fixing frame 10 fixedly connected to the top of the frame body 1, a pressure sensor 12 fixedly connected to the inner wall of the fixing frame 10, the surface of the pressure sensor 12 extending out of the inner wall of the fixing frame 10, a support frame 11 fixedly connected to the bottom of the frame body 1, a yarn measuring component 2 provided on the inner wall of the frame body 1, and a tension component 3 provided on the inner wall of the fixing frame 10.

[0029] The yarn measuring component 2 includes a protective frame 21 fixedly connected to the inner wall of the frame body 1, and a laser rangefinder 22 fixedly connected to the inner wall of the protective frame 21;

[0030] First, the yarn is passed through the tension assembly 3 to the inner wall of the fixing frame 10. At this time, the tension assembly 3 can keep the yarn under tension. As the yarn continues to pass through the fixing frame 10, it will come into contact with the pressure sensor 12 that extends out of the inner wall of the fixing frame 10. At this time, the pressure sensor 12 senses that the yarn is passing by. Then, the laser rangefinder 22 will work to emit a laser to measure the distance to the pressure sensor 12. However, since the yarn passes through the surface of the pressure sensor 12, the light emitted by the laser rangefinder 22 will be blocked by the yarn, so that the laser rangefinder 22 can only measure the distance to the yarn. Based on the distance from the laser rangefinder 22 to the pressure sensor 12, the diameter of the yarn can be calculated.

[0031] The laser rangefinder 22 emits a laser and measures the distance from it to the surface of the pressure sensor 12, which is recorded as L1.

[0032] When the yarn passes by, the laser is blocked by the yarn, and the laser rangefinder 22 can only measure the distance to the surface of the yarn, which is recorded as L2.

[0033] The yarn diameter D is calculated using the following formula:

[0034] D = L1 - L2.

[0035] The improvement in this embodiment is as follows:

[0036] Considering that existing yarn sensors can affect the detection process due to yarn density, from the perspective of light signal obstruction, a higher yarn density makes it more difficult for light to penetrate. Even for yarns of the same diameter, the denser internal fiber arrangement enhances the absorption and scattering of the laser beam, resulting in a weaker intensity of the unobstructed light signal received by the photodetector compared to low-density yarn. This could lead to the detection system misjudging the yarn diameter as larger. Therefore, by using the coordinated operation of the laser rangefinder 22 and the pressure sensor 12, the distance difference between the measured light reaching the yarn and the pressure sensor 12 can be used to accurately calculate the yarn diameter, effectively meeting the high-precision detection requirements for yarn diameter in the production process. Even when faced with light signal interference caused by differences in yarn density, the device can still reduce the impact of density on the measurement results to a certain extent through a stable measurement principle. At the same time, the tension component 3 ensures that the yarn maintains tension during continuous movement, preventing the yarn from deviating from the predetermined position due to slack or bending, thus ensuring the stability of the yarn throughout the entire detection process.

[0037] To ensure that the light emitted by the laser rangefinder 22 is blocked by the yarn on the surface of the pressure sensor 12, the laser rangefinder 22 and the pressure sensor 12 are positioned on the same horizontal line. By mounting the laser rangefinder 22 and the pressure sensor 12 on the same horizontal line, the light emitted by the laser rangefinder 22 will be precisely blocked by the yarn on the surface of the pressure sensor 12. Please refer to [reference needed]. Figure 5 The direction the arrow points.

[0038] In order for the laser rangefinder 22 to display the diameter of the yarn, a display screen 23 is fixedly connected to the surface of the frame body 1. The display screen 23 is electrically connected to the laser rangefinder 22, and a stable electrical connection is established between the display screen 23 and the laser rangefinder 22. After the laser rangefinder 22 completes the measurement of the yarn diameter according to the predetermined workflow, it will transmit the measurement data to the display screen 23 in real time. The display screen 23 then analyzes and displays the data, and the operator can clearly obtain the specific value of the yarn diameter at a glance.

[0039] In order for the tension assembly 3 to allow the yarn to pass through the fixing frame 10, it is necessary to further disclose the parts of the tension assembly 3. Therefore, the tension assembly 3 includes two fixing plates 33 fixedly connected to the inner wall of the fixing frame 10, and the two fixing plates 33 are symmetrically distributed at both ends of the fixing frame 10.

[0040] The surface of the fixing plate 33 is provided with a second threading hole 330. First, one end of the yarn is inserted into one of the second threading holes 330. Then, the yarn is continuously pulled to make it pass smoothly through the other second threading hole 330. Next, the end of the yarn is connected to the subsequent textile process. Due to the setting of the fixing plate 33, the yarn can be stably placed in the inner cavity of the fixing frame 10 during continuous movement, thereby ensuring that the yarn can contact the pressure sensor 12 that extends out of the inner wall of the fixing frame 10.

[0041] In order to maintain tension and avoid bending of the yarn during continuous movement, a connecting rod 31 is fixedly connected to the top of the frame body 1, and a connecting plate 32 is fixedly connected to the end of the connecting rod 31. A first threading hole 320 is opened on the surface of the connecting plate 32.

[0042] Connecting rods 31 are two symmetrically distributed on the top of the main frame 1;

[0043] The connecting plate 32 is located above the fixing plate 33. The yarn first enters through the first threading hole 320 on one side. Due to the position of the connecting rod 31 and the connecting plate 32, the yarn is initially stretched at this point, forming a certain pretension. Then, the yarn passes downward through the second threading hole 330 on the lower fixing plate 33. Subsequently, the yarn is continuously pulled to pass through the second threading hole 330 on the other side fixing plate 33, and then upward through the corresponding first threading hole 320. Finally, the end of the yarn is connected to the subsequent weaving process. During the continuous movement of the yarn, the connecting plate 32 and the fixing plate 33 constrain the yarn in the vertical direction through the threading holes. Combined with the supporting effect of the connecting rod 31, the yarn is always kept in a taut state.

[0044] In practical use, the yarn thickness detection sensor of this utility model first inserts the yarn through the first threading hole 320 on one side. Due to the positioning of the connecting rod 31 and the connecting plate 32, the yarn is initially stretched at this point, forming a certain pretension. Then, the yarn passes downward through the second threading hole 330 on the lower fixing plate 33. Subsequently, the yarn is continuously pulled to pass through the second threading hole 330 on the other side fixing plate 33, and then upward through the corresponding first threading hole 320. Finally, the end of the yarn is connected to the subsequent textile process. During this process, the yarn continuously passes through the fixing frame 10 and comes into contact with the pressure sensor 12 extending from the inner wall of the fixing frame 10. At this time, the pressure sensor 12 senses the passing of a yarn. The laser rangefinder 22 will then emit a laser to measure the distance to the pressure sensor 12. However, since the yarn passes over the surface of the pressure sensor 12, the light emitted by the laser rangefinder 22 will be blocked by the yarn, so the laser rangefinder 22 can only measure the distance to the yarn. Based on the distance from the laser rangefinder 22 to the pressure sensor 12, the diameter of the yarn can be calculated. After the laser rangefinder 22 completes the measurement of the yarn diameter according to the predetermined workflow, it will transmit the measurement data to the display screen 23 in real time, and the yarn diameter can be viewed on the display screen 23.

[0045] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A yarn thickness detection sensor, comprising a frame body (1), characterized in that: A fixed frame (10) is fixedly connected to the top of the frame body (1), a pressure sensor (12) is fixedly connected to the inner wall of the fixed frame (10), the surface of the pressure sensor (12) extends out of the inner wall of the fixed frame (10), a support frame (11) is fixedly connected to the bottom of the frame body (1), a yarn measuring component (2) is provided on the inner wall of the frame body (1), and a tension component (3) is provided on the inner wall of the fixed frame (10). The yarn measuring component (2) includes a protective frame (21) fixedly connected to the inner wall of the frame body (1), and a laser rangefinder (22) is fixedly connected to the inner wall of the protective frame (21).

2. The yarn thickness detection sensor according to claim 1, characterized in that: The laser rangefinder (22) and the pressure sensor (12) are located on the same horizontal line.

3. The yarn thickness detection sensor according to claim 1, characterized in that: A display screen (23) is fixedly connected to the surface of the frame body (1), and the display screen (23) is electrically connected to the laser rangefinder (22).

4. The yarn thickness detection sensor according to claim 1, characterized in that: The tension assembly (3) includes two fixing plates (33) fixedly connected to the inner wall of the fixing frame (10), and the two fixing plates (33) are symmetrically distributed at both ends of the fixing frame (10); The surface of the fixing plate (33) is provided with a second wire hole (330).

5. The yarn thickness detection sensor according to claim 4, characterized in that: A connecting rod (31) is fixedly connected to the top of the frame body (1), and a connecting plate (32) is fixedly connected to the end of the connecting rod (31). A first threading hole (320) is opened on the surface of the connecting plate (32). The connecting rods (31) are two symmetrically distributed on the top of the frame body (1); The connecting plate (32) is located above the fixing plate (33).

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