A device for measuring the density of packaged yarn.

Abstract

This application relates to a device for measuring the density of yarn packages. The device includes a main body, a weighing mechanism, an imaging component, and a calculation mechanism. The weighing mechanism, the imaging component, and the calculation mechanism are all mounted on the main body, and the weighing mechanism and the imaging component are both connected to the calculation mechanism. This application improves measurement accuracy.

Description

Technical Field

[0001] This application relates to the technical field of measuring equipment, and in particular to a device for measuring the density of yarn packages. Background Technology

[0002] Package yarn density is an important yarn quality monitoring indicator in the yarn production process. It is related to the winding machine speed, yarn tension, and yarn type. The stability of package yarn density directly affects the quality and stability of fabric production in downstream weaving mills.

[0003] Due to limitations in yarn production processes, packaged yarn cannot be formed into a standard shape that is easy to measure and calculate in terms of volume, such as a standard cylinder or cube. The main shapes of packaged yarn on the market are cylindrical, conical, and three-section conical, all of which share the common characteristic that their cross-section can be approximated as a circle.

[0004] Current measurement methods involve manually approximating the yarn package as a standard cone or cylinder to calculate its volume, then manually measuring its mass using a balance, and finally calculating the yarn package density. This manual measurement method is prone to inaccuracies. Utility Model Content

[0005] To improve the accuracy of measurements, this application provides a device for measuring the density of yarn packages.

[0006] This application provides a device for measuring the density of yarn packages, which adopts the following technical solution: A device for measuring the density of yarn packages includes a main body, a weighing mechanism, an imaging component, and a calculation mechanism. The weighing mechanism, the imaging component, and the calculation mechanism are all mounted on the main body, and the weighing mechanism and the imaging component are all connected to the calculation mechanism.

[0007] By adopting the above technical solution, the yarn tube is placed on a weighing mechanism to obtain its mass, and the image of the yarn tube captured by the imaging component is processed by the computing mechanism to obtain its volume. Then, the yarn tube with the packaged yarn is placed on the weighing mechanism to obtain its mass, and the image of the packaged yarn is captured by the imaging component and processed by the computing mechanism to obtain its volume. Then, the computing mechanism can obtain the mass and volume of the packaged yarn, thus obtaining the density of the packaged yarn. The measuring device provided in this application can conveniently and quickly measure the density of packaged yarn and improve the accuracy of the measurement.

[0008] Optionally, a measuring cavity is formed within the main body, and both the computing mechanism and the imaging component are disposed within the measuring cavity. A cover plate covering the measuring cavity is disposed on the main body.

[0009] By adopting the above technical solution, when the yarn package is being measured, the cover plate covers the measuring chamber, thereby reducing the phenomenon of dust entering the measuring chamber and affecting the measurement accuracy, thus improving the accuracy of the test.

[0010] Optionally, the weighing mechanism includes a weighing sensor and a weighing tray. The weighing sensor is disposed on the main body and located inside the measuring cavity, and the weighing sensor is connected to the computing mechanism. The weighing tray is disposed on the weighing sensor.

[0011] By adopting the above technical solution, the yarn tube is placed on the weighing tray, and the weighing sensor will sense the weight of the yarn tube; the weighing mechanism is simple in structure and easy to operate.

[0012] Optionally, the weighing tray is provided with an adaptation bracket, the adaptation bracket including a fixed column and a spring piece, the fixed column being disposed on the weighing tray; multiple spring pieces are provided, and multiple spring pieces are disposed on the fixed column.

[0013] By adopting the above technical solution, the yarn tube to which the yarn package is attached is placed on the appropriate support. The spring plate deforms and presses against the inner wall of the yarn tube, thereby fixing the yarn package to which the yarn package is attached, improving the stability of the yarn package on the weighing tray, and also facilitating the subsequent shooting of the shooting components.

[0014] Optionally, one or more imaging components are provided, and the imaging component includes a camera, which is disposed on the side wall of the measuring cavity and connected to the computing mechanism.

[0015] By adopting the above technical solution, the camera of the shooting component outputs the captured image to the computing mechanism, which then modifies it into the desired image.

[0016] Optionally, when there are multiple imaging components, the cameras of the multiple imaging components are arranged at different positions on the sidewall of the measurement cavity.

[0017] By adopting the above technical solution, cameras located in different positions can make the images obtained by the computing mechanism more accurate.

[0018] Optionally, a light source illumination component is provided inside the measuring cavity, and the imaging component is located on the side of the weighing mechanism away from the light source illumination component.

[0019] By adopting the above technical solution, the light source illumination component emits light that cannot penetrate the yarn package, thus allowing the imaging component to better extract the image of the yarn package.

[0020] Optionally, the main body is provided with a fixing mechanism connected to the cover plate. The fixing mechanism includes a first fixing block, a second fixing block, and a fixing component. The first fixing block is disposed on the main body and has a placement groove. The second fixing block is disposed on the cover plate and can engage with the placement groove. The fixing component is disposed on the first fixing block and connected to the second fixing block.

[0021] By adopting the above technical solution, when the cover plate is rotated and covers the measuring cavity, the second fixing block on the cover plate is located in the placement groove of the first fixing block. Then, the fixing component is used to fix the second fixing block on the first fixing block, thereby fixing the second fixing block on the first fixing block. The cover plate is stably set on the main body and covers the measuring cavity.

[0022] Optionally, the fixing component includes a fixing rod and a spring. The first fixing block has a through hole communicating with the placement groove, and the fixing rod is slidably disposed in the through hole. The second fixing block has a fixing groove that engages with the fixing rod. One end of the spring is connected to the fixing rod and the other end is connected to the first fixing block.

[0023] By adopting the above technical solution, before the second fixing block enters the placement groove, the fixing rod is pulled so that one end of the fixing rod is not located in the placement groove, and the spring will deform; after the second fixing block enters the placement groove of the first fixing block, the fixing rod is released, and the force of the spring restoring its elastic deformation will drive the fixing rod to move, so that the fixing rod is engaged with the fixing groove on the second fixing block; the fixed component structure is simple and easy to operate.

[0024] In summary, this application includes at least one of the following beneficial technical effects: 1. The measuring device provided in this application can conveniently and quickly measure the density of yarn packages and improve the accuracy of the measurement; 2. When measuring the yarn package, the cover plate covers the measuring chamber to reduce the amount of dust entering the measuring chamber and affecting the measurement accuracy, thereby improving the accuracy of the test. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the yarn density measuring device in the embodiments of this application; Figure 2 This is a schematic diagram of the weighing mechanism in the embodiments of this application; Figure 3 for Figure 1 Enlarged view of 'a' in the middle; Figure 4 This is a schematic diagram of the structure of the adaptable stent in the embodiments of this application; Figure 5This is a schematic diagram of the checkerboard structure used for image distortion correction in the embodiments of this application. Figure 6 This is a schematic diagram of the boundary of the object under test being segmented into a cylinder according to a one-pixel height in an embodiment of this application; Figure 7 This is a stitched image of the complete boundary of the yarn tube obtained by the computing mechanism in the embodiments of this application; Figure 8 This is a stitched image of the complete boundary of the yarn tube and the yarn package obtained by the computing mechanism in the embodiments of this application.

[0026] Reference numerals: 1. Main body; 11. Measuring cavity; 12. Receiving cavity; 2. Weighing mechanism; 21. Weighing sensor; 22. Weighing tray; 3. Imaging assembly; 4. Calculation mechanism; 5. Cover plate; 6. Adaptive bracket; 61. Fixing column; 62. Spring; 7. Light source illumination assembly; 8. Fixing mechanism; 81. First fixing block; 82. Second fixing block; 83. Fixing assembly; 831. Fixing rod; 832. Spring; 91. Yarn bobbin; 92. Yarn tube; 93. Boundary of the object to be measured. Detailed Implementation

[0027] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail.

[0028] This application discloses a device for measuring the density of yarn packages.

[0029] refer to Figure 1 and Figure 2 A device for measuring the density of yarn packages includes a main body 1, on which a measuring cavity 11 and a receiving cavity 12 are provided.

[0030] The main body 1 is provided with a cover plate 5 that covers the measuring cavity 11. refer to Figure 1 and Figure 3 The main body 1 is provided with a fixing mechanism 8 connected to the cover plate 5. The fixing mechanism 8 includes a first fixing block 81 fixedly connected to the main body 1. The first fixing block 81 has a placement groove and a through hole communicating with the placement groove. One end of the cover is hinged to the main body 1 and the other end is integrally provided with a second fixing block 82. The second fixing block 82 can be located in the placement groove of the first fixing block 81. The second fixing block 82 has a fixing groove. The first fixing block 81 is provided with a fixing component 83. The fixing component 83 includes a fixing rod 831 slidably connected in the through hole of the first fixing block 81. The fixing rod 831 can be engaged with the fixing groove on the second fixing block 82. A spring 832 is sleeved on the fixing rod 831. One end of the spring 832 is connected to the fixing rod 831 and the other end is connected to the first fixing block 81.

[0031] The operator first pulls the fixing rod 831 so that one end of the fixing rod 831 is no longer located in the placement groove of the first fixing block 81, and the spring 832 will deform; then rotate the cover plate 5 so that the cover plate 5 covers the measuring cavity 11 of the main body 1, and the second fixing block 82 is located in the placement groove of the first fixing block 81; then release the fixing rod 831, and the force of the spring 832 restoring its elastic deformation drives the fixing rod 831 to move, so that the fixing rod 831 engages with the fixing groove on the second fixing block 82, thereby fixing the second fixing block 82 on the first fixing block 81, and the cover plate 5 is firmly set on the main body 1 and covers the measuring cavity 11.

[0032] refer to Figure 2 and Figure 4 91 refers to the yarn wound on the yarn tube 92.

[0033] A weighing mechanism 2 is installed inside the measuring cavity 11 of the main body 1. The weighing mechanism 2 includes a weighing sensor 21 fixedly connected to the main body 1 and located inside the measuring cavity 11. A weighing tray 22 is fixed to the weighing sensor 21. An adaptation bracket 6 is provided on the weighing tray 22. The adaptation bracket 6 includes a fixed column 61 fixed to the center of the tray. Three spring pieces 62 are evenly connected to the peripheral wall of the fixed column 61. The width of the spring pieces 62 is between 5-50 mm, and the height is between 10-100 mm. They can support yarn tubes 92 with an inner diameter of 30-120 mm. The material of the spring pieces 62 can be a highly elastic material such as nickel-titanium, tin-copper, or stainless steel.

[0034] When the yarn tube 92 is placed on the weighing tray 22, all three spring pieces 62 will abut against the inner wall of the yarn tube 92. The three spring pieces 62 will deform, and the force of the spring pieces 62 restoring their elastic deformation will fix the yarn tube 92.

[0035] refer to Figure 2 A light source illumination assembly 7 is provided on the side wall of the measuring cavity 11 away from the receiving cavity 12. The light source illumination assembly 7 includes a surface light source, the size of which is larger than the size of the yarn package 91. Two shooting assemblies 3 are provided on the side wall of the measuring cavity 11 near the receiving cavity 12. The shooting assembly 3 includes a camera. The two cameras are located on the same side wall of the receiving cavity, and the two cameras are arranged vertically on the side wall of the receiving cavity. The weighing tray 22 is located between the surface light source and the two cameras, so that the surface light source can provide back lighting for the yarn package 91 located on the weighing tray 22.

[0036] refer to Figure 1 and Figure 2The main body 1 houses a computing mechanism 4 within its accommodating cavity 12. This computing mechanism 4 includes a computer operating system and associated electronic components. A touchscreen connected to the computer operating system is mounted on the main body 1, allowing testers to set and adjust parameters via the touchscreen. The computing mechanism 4 can be understood as a central processing unit (CPU), capable of processing images and data. The CPU is existing technology and will not be elaborated upon here. Two cameras and a weighing sensor 21 located within the measuring cavity 11 are electrically connected to the computing mechanism 4.

[0037] The implementation principle of the device for measuring the density of yarn packages in this application embodiment is as follows: (Refer to...) Figure 5 First, a checkerboard pattern is used to correct image distortion and obtain key parameters for converting image size to physical size. Specifically, a checkerboard template is placed above the center of the weighing tray 22 and perpendicular to two cameras, allowing the cameras to capture images of the template. The computing mechanism obtains these images. The computing mechanism calculates the pixel distance L between two diagonal points (A, B) in the captured image, where L represents the straight-line distance between the two diagonal points (A, B) in the captured image. The actual distance between points A and B on the checkerboard template is known or can be measured using a micrometer or similar tool. The key parameter for converting image size to physical size, C, is obtained by dividing the distance between points A and B by L.

[0038] refer to Figure 6 , Figure 7 and Figure 8 The object to be tested is placed on the weighing tray 22, and the computing mechanism 4 obtains the mass of the object through the weighing sensor 21. Images of the object acquired by the two cameras are transmitted to the computing mechanism 4. The computing mechanism 4 performs distortion correction on the image data from the two cameras and stitches the two camera images into a complete image. The complete image represents the entire outline of the object. The computing mechanism 4 automatically calculates the boundary 93 of the object from the complete image using a pre-trained deep learning model or a traditional image segmentation algorithm. The computing mechanism 4 divides the object into n cylinders according to a one-pixel height based on the boundary 93 of the object. The actual height H of each pixel is C*1; the actual width D of each cylinder is the image width multiplied by C; and the volume V of each cylinder is calculated as V = π(D / 2). 2 H, then add the volumes of the n cylinders to obtain the measured volume of the object to be measured. Perform multiple measurements on the object to obtain multiple measured volumes, and calculate the average of these multiple measured volumes to obtain the true volume of the object to be measured.

[0039] Because the height of a single pixel is relatively small, the object under test can be divided into multiple cylinders based on the height of a single pixel.

[0040] First, the yarn tube 92 without yarn is placed on the weighing tray 22, with all three spring clips 62 abutting against the sidewall of the yarn tube 92. Then, the second fixing block 82 is fixed to the first fixing block 81. The computing mechanism 4 obtains the mass of the yarn tube 92 through the weighing sensor 21. Images of the yarn tube 92 obtained by the two cameras are transmitted to the computing mechanism 4, which uses a pre-trained deep learning model to obtain the volume of the yarn tube 92.

[0041] Then, the yarn tube 92 with the yarn wound around it is placed on the weighing tray 22, and all three spring pieces 62 abut against the side wall of the yarn tube 92. Then, the second fixing block 82 is fixed on the first fixing block 81. The computing mechanism 4 obtains the total mass of the yarn tube 92 and the yarn package 91 through the weighing sensor 21. The images obtained by the two cameras are transmitted to the computing mechanism 4, and the computing mechanism 4 uses a pre-trained deep learning model to obtain the total volume of the yarn tube 92 and the yarn package 91.

[0042] The mass of the yarn package 91 is obtained by subtracting the mass of the yarn package 92 from the total mass of the yarn tube 92 and the yarn package 91. The mass of the yarn package 91 is obtained by subtracting the mass of the yarn tube 92 from the total volume of the yarn tube 92 and the yarn package 91. Finally, the density of the yarn package 91 is obtained by dividing the mass of the yarn package 91 by the volume of the yarn package 91.

[0043] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A device for measuring the density of yarn packages, characterized in that, It includes a main body (1), a weighing mechanism (2), a shooting component (3) and a computing mechanism (4). The weighing mechanism (2), the shooting component (3) and the computing mechanism (4) are all disposed on the main body (1), and the weighing mechanism (2) and the shooting component (3) are both connected to the computing mechanism (4).

2. The device for measuring the density of yarn packages according to claim 1, characterized in that, The main body (1) has a measuring cavity (11) formed inside it. The computing mechanism (4) and the shooting component (3) are both located inside the measuring cavity (11). The main body (1) is provided with a cover plate (5) covering the measuring cavity (11).

3. The device for measuring the density of yarn packages according to claim 2, characterized in that, The weighing mechanism (2) includes a weighing sensor (21) and a weighing tray (22). The weighing sensor (21) is disposed on the main body (1) and located in the measuring cavity (11). The weighing sensor (21) is connected to the calculation mechanism (4). The weighing tray (22) is disposed on the weighing sensor (21).

4. The device for measuring the density of yarn packages according to claim 3, characterized in that, The weighing tray (22) is provided with an adaptation bracket (6), which includes a fixed column (61) and a spring piece (62). The fixed column (61) is provided on the weighing tray (22). Multiple spring pieces (62) are provided, and multiple spring pieces (62) are provided on the fixed column (61).

5. The device for measuring the density of yarn packages according to claim 2, characterized in that, The shooting component (3) is provided with one or more cameras, which are disposed on the side wall of the measuring cavity (11) and connected to the computing mechanism (4).

6. The device for measuring the density of yarn packages according to claim 5, characterized in that, When there are multiple shooting components (3), the cameras of the multiple shooting components (3) are set at different positions on the side wall of the measuring cavity (11).

7. The device for measuring the density of yarn packages according to claim 2, characterized in that, The measuring cavity (11) is provided with a light source illumination component (7), and the shooting component (3) is located on the side of the weighing mechanism (2) away from the light source illumination component (7).

8. The device for measuring the density of yarn packages according to claim 2, characterized in that, The main body (1) is provided with a fixing mechanism (8) connected to the cover plate (5). The fixing mechanism (8) includes a first fixing block (81), a second fixing block (82) and a fixing component (83). The first fixing block (81) is provided on the main body (1) and has a placement groove. The second fixing block (82) is provided on the cover plate (5) and can be engaged with the placement groove. The fixing component (83) is provided on the first fixing block (81) and connected to the second fixing block (82).

9. The device for measuring the density of yarn packages according to claim 8, characterized in that, The fixing component (83) includes a fixing rod (831) and a spring (832). The first fixing block (81) has a through hole communicating with the placement groove. The fixing rod (831) is slidably disposed in the through hole. The second fixing block (82) has a fixing groove that engages with the fixing rod (831). One end of the spring (832) is connected to the fixing rod (831) and the other end is connected to the first fixing block (81).

Images