Oxford fabric density laser detection device and method

Abstract

The invention discloses an Oxford fabric density laser detection device and method, and belongs to the field of Oxford fabric detection. The Oxford fabric density laser detection device comprises a top plate and further comprises a movable frame sliding on the top plate, and the bottom of the movable frame is slidably connected with two sliding blocks; the vertical plate is fixedly connected to the bottom of the moving frame, a mounting plate is arranged at the bottom of the vertical plate, a laser transmitter is arranged in the middle of the mounting plate, and signal receiving cameras are obliquely arranged on the two sides of the mounting plate; fixing blocks are arranged on the two sides of the sliding block, connecting blocks are slidably connected to the bottoms of the fixing blocks, supporting plates are arranged at the bottoms of the connecting blocks, and flattening rollers are rotatably connected to the supporting plates; according to the method, dislocation, overlapping or bending deformation of warp and weft yarns in the oxford fabric can be avoided, so that the wave crest form can be accurately reflected, a system can better identify and improve the detection accuracy, and the judgment reliability and the density calculation stability are improved.

Description

Technical Field

[0001] This invention relates to the field of Oxford cloth testing technology, and more particularly to a laser testing device and method for Oxford cloth fabric density. Background Technology

[0002] Oxford cloth, a tightly woven and durable textile, is widely used in bags, outdoor equipment, automotive interiors, and other fields. Its warp and weft yarn density is a core indicator that determines the product's mechanical properties, appearance, texture, and compliance with specifications. Currently, non-contact density testing technology based on laser scattering and imaging has gradually replaced traditional manual yarn counting and microscope testing due to its advantages such as fast testing speed, high accuracy, and non-destructive testing, becoming the mainstream technology for Oxford cloth density testing.

[0003] However, in the practical application of existing laser detection technology, the Oxford cloth sample is usually placed directly on the area to be detected. This often results in the Oxford cloth sample not being fully flattened, which is a key bottleneck affecting the accuracy and stability of the detection. Specifically, this manifests as follows: Unlaid Oxford cloth may have wrinkles, curls, or uneven tension, causing misalignment, overlap, or bending deformation of warp and weft yarns. When irradiated with laser, the originally regular uneven structure of the yarn is disrupted, and the periodic peak and trough morphology of the reflected light signal becomes disordered. The system cannot accurately identify the boundaries of individual yarns, easily misjudging overlapping yarns at wrinkles as single yarns, or omitting yarns that overlap due to bending. Ultimately, this results in a large deviation between the density detection data and the true value, making it unreliable as a basis for product qualification. At the same time, the uneven surface causes multiple reflections and scattering of the laser, introducing a large amount of noise signal, further reducing the contrast between the yarns and gaps, and significantly decreasing the repeatability and stability of density calculation. In view of this, the present invention is proposed. Summary of the Invention

[0004] The purpose of this invention is to address the problems existing in the present invention by providing a laser detection device and method for the density of Oxford cloth fabric.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A laser density detection device for Oxford cloth fabric includes a top plate and further includes: A movable frame is slidably mounted on the top plate, and two sliders are slidably connected to the bottom of the movable frame; A vertical plate is fixedly connected to the bottom of the mobile frame. A mounting plate is provided at the bottom of the vertical plate. A laser emitter is provided in the middle of the mounting plate. Signal receiving cameras that are inclined and cooperate with the laser emitter are provided on both sides of the mounting plate. Fixed blocks are provided on both sides of the slider, and a connecting block is slidably connected to the bottom of the fixed block. A support plate is provided at the bottom of the connecting block, and a flattening roller is rotatably connected to the support plate.

[0006] Preferably, the bottom of the movable frame is fixedly provided with three sets of support ears, a threaded rod is rotatably connected between the middle set of support ears, and a limit rod is provided between the two sets of support ears on both sides. The threads at both ends of the threaded rod have opposite directions, and the two sliders are respectively threaded to the two ends of the threaded rod.

[0007] Furthermore, a motor is provided on one of the support ears in the middle group, the threaded rod is provided at the output end of the motor, and a support rod is provided on the outer wall of the slider, the support rod being slidably connected to the limiting rod.

[0008] Furthermore, the fixing block is fixedly installed at the end of the support rod away from the slider, and the bottom of the fixing block is provided with an insert block, and the bottom of the insert block is provided with a sliding plate, which is slidably connected inside the connecting block.

[0009] Furthermore, two guide posts are fixedly installed inside the connecting block, the slide plate is slidably connected to the guide posts, and springs are connected between the upper and lower ends of the slide plate and the upper and lower inner walls of the connecting block, respectively. The springs are sleeved on the outer wall of the guide posts, and multiple thin rods are fixedly connected to the connecting block, and the thin rods are slidably inserted into the fixed block.

[0010] Preferably, the connecting block is provided with an extension plate, the extension plate is provided with a connecting shaft, the connecting shaft is rotatably connected with an inclined plate, the inclined plate is fixedly provided with an inclined block, and the inclined block is provided with a pressure plate.

[0011] Furthermore, a limiting block is slidably connected inside the inclined block, and multiple elastic elements are provided between the limiting block and the inner wall of the inclined block. A pressure switch is fixedly installed on the inner wall of the limiting block, and a heating plate is provided inside the pressure plate. The pressure switch is electrically connected to the heating plate.

[0012] Preferably, the laser emitter has multiple linearly distributed components, and the signal receiving camera has two sets, which are respectively arranged on both sides of the laser emitter, with each set of signal receiving cameras having multiple linearly distributed components.

[0013] Preferably, the top plate is provided with a cylinder, the movable frame is located at the output end of the cylinder, and multiple horizontal plates are fixedly provided on the outer wall of the top plate, with supporting legs at the bottom of the horizontal plates.

[0014] A laser method for detecting the density of Oxford cloth fabric comprises the following steps: Step 1: Place the prepared Oxford cloth fabric under the device; Step 2: Control the moving frame to move downwards so that the flattening roller comes into contact with the Oxford cloth fabric; Step 3: Continue to control the moving frame to move downwards, so that pressure is generated between the flattening roller and the Oxford cloth fabric; Step 4: Control the two sliders to move away from each other simultaneously, thereby moving the two pressing rollers away from each other to flatten the Oxford cloth fabric. Step 5: Activate the laser emitter to emit a stable and uniform linear laser beam onto the flat surface of the Oxford cloth. The laser beam is reflected by the cloth to form an optical signal with alternating bright and dark periods. The signal receiving camera will collect the reflected light signal in real time and convert the optical image into an electrical signal and a digital image. The control system in the external control panel uses an image processing algorithm to identify the number of bright and dark periods and finally calculate the number of yarns per unit length, i.e., the fabric density.

[0015] Compared with the prior art, the present invention provides a laser detection device and method for the density of Oxford cloth fabric, which has the following beneficial effects: 1. This Oxford cloth fabric density laser detection device utilizes the periodic uneven structure formed by the interlacing of warp and weft yarns in Oxford cloth. The raised yarns reflect light strongly, while the recessed areas between the yarns reflect light weakly. During operation, the laser emitter is activated to emit a stable and uniform linear laser beam onto the flat surface of the Oxford cloth. The laser beam is reflected by the fabric surface, creating an alternating, periodically changing optical signal. A signal receiving camera collects this reflected light signal in real time, converting the optical image into an electrical signal and a digital image. The control system within the external control panel uses an image processing algorithm to identify the number of light and dark cycles, ultimately calculating the number of yarns per unit length, i.e., the fabric density.

[0016] 2. This Oxford cloth fabric density laser detection device, by controlling the downward movement of the moving frame, can drive the flattening rollers and flattening plates to come into contact with the Oxford cloth fabric. Then, by controlling the threaded rod, it causes the sliders connected to both ends to move away from each other, thereby driving the two sets of flattening rollers and two sets of flattening plates to move away from each other. Through the dual action of the flattening rollers and flattening plates, the flattening effect of the Oxford cloth fabric is improved, avoiding misalignment, overlap, or bending deformation of the warp and weft yarns inside the Oxford cloth. This allows the laser emitter to irradiate better, accurately reflect the peak shape, and enable the system to better identify, improve the accuracy of detection, enhance the reliability of judgment, and improve the stability of density calculation.

[0017] 3. In this Oxford cloth fabric density laser detection device, when the flattening roller comes into contact with the Oxford cloth fabric, the pressure plate also comes into contact with the Oxford cloth fabric. At the same time, under the action of the limiting block, the pressure switch is also pressed, which causes the pressure switch to send a signal to heat the heating plate. This allows the heated pressure plate to heat the Oxford cloth fabric, thereby better flattening the Oxford cloth fabric, softening the Oxford cloth fibers, eliminating wrinkles and internal stress, making it easier to flatten. At the same time, after flattening, the fabric surface is flat, the yarn arrangement is regular, and the laser detection is more accurate. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a laser density detection device for Oxford cloth fabric proposed in this invention. Figure 1 ; Figure 2 This is a schematic diagram of the structure of a laser density detection device for Oxford cloth fabric proposed in this invention. Figure 2 ; Figure 3 This is a schematic diagram of the bottom structure of a laser density detection device for Oxford cloth fabric proposed in this invention; Figure 4 This is a schematic diagram of the moving frame in the laser density detection device for Oxford cloth fabric proposed in this invention; Figure 5 This is a schematic diagram of the structure of the bottom of the movable frame in a laser density detection device for Oxford cloth fabric proposed in this invention; Figure 6 This is a schematic diagram of the laser transmitter and signal receiving camera in a laser density detection device for Oxford cloth fabric proposed in this invention. Figure 7 This is a schematic diagram of the pressing roller and pressing plate in the laser density detection device for Oxford cloth fabric proposed in this invention; Figure 8 This is a cross-sectional schematic diagram of the inclined block in a laser density detection device for Oxford cloth fabric proposed in this invention.

[0019] In the diagram: 1. Top plate; 101. Horizontal plate; 102. Support leg; 103. Cylinder; 2. Moving frame; 201. Support ear; 202. Motor; 203. Threaded rod; 204. Limiting rod; 205. Vertical plate; 206. Mounting plate; 207. Laser emitter; 208. Signal receiving camera; 3. Slider; 301. Support rod; 302. Fixing block; 303. Insertion block; 304. Slide plate; 305. Connecting block; 306. Support plate; 307. Flattening roller; 308. Guide column; 309. Spring; 310. Thin rod; 4. Extending plate; 401. Connecting shaft; 402. Inclined plate; 403. Inclined block; 404. Pressing plate; 405. Limiting block; 406. Elastic element; 407. Pressure switch; 408. Heating plate. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0021] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0022] Example 1: Refer to Figures 1-8 A laser density detection device for Oxford cloth fabric includes a top plate 1, a movable frame 2 slidably mounted on the top plate 1, two sliders 3 slidably connected to the bottom of the movable frame 2, and a vertical plate 205 fixedly connected to the bottom of the movable frame 2. The bottom of the vertical plate 205 is provided with a mounting plate 206, a laser emitter 207 is provided in the middle of the mounting plate 206, and signal receiving cameras 208 inclined and cooperating with the laser emitter 207 are provided on both sides of the mounting plate 206. Fixing blocks 302 are provided on both sides of the sliders 3, connecting blocks 305 are slidably connected to the bottom of the fixing blocks 302, a support plate 306 is provided at the bottom of the connecting blocks 305, and a flattening roller 307 is rotatably connected to the support plate 306.

[0023] In this embodiment, during use, the Oxford cloth fabric to be tested is first placed under the entire device. The movable frame 2 is then moved downwards on the top plate 1, causing the bottom flattening roller 307 to first contact the Oxford cloth fabric. The movable frame 2 continues to move downwards, applying pressure to the Oxford cloth fabric with the flattening roller 307. At this point, the connecting block 305 slides against the fixed block 302. Then, the two sliders 3 are moved, causing them to move away from each other simultaneously. This, in turn, causes the fixed block 302 and the connecting block 305 to move away from each other, resulting in the bottom flattening roller 307 moving to both sides, thus flattening the Oxford cloth fabric and improving the accuracy of subsequent testing results. During testing, because Oxford cloth has a periodic uneven structure formed by the interlacing of warp and weft yarns, the raised yarns reflect light strongly, while the recessed areas between the yarns reflect light weakly. During operation, the laser emitter 207 is activated to emit a stable and uniform linear laser beam onto the flat surface of the Oxford cloth. The laser beam is reflected by the fabric surface, forming an alternating, periodically changing optical signal. The signal receiving camera 208 then collects this reflected light signal in real time, converting the optical image into an electrical signal and a digital image. The control system within the external control panel uses an image processing algorithm to identify the number of bright and dark cycles, ultimately calculating the number of yarns per unit length, i.e., the fabric density. The working principle of the light emitter 207 is to emit a monochromatic laser beam with good collimation. When the laser shines on the fabric surface, it forms a regular light intensity distribution by utilizing the micro-undulation structure of the yarn. Its function is to provide a stable, high-contrast illumination source to highlight the differences between the yarn and the gaps. The working principle of the signal receiving camera 208 is that the camera lens focuses on the detection area of ​​the Oxford cloth and receives the laser reflected light. The image sensor converts the light signal into pixel electrical signals to form a grayscale image. The image output by the camera is a set of regular bright and dark stripes, corresponding to the yarn arrangement pattern. Specifically, the laser emitter 207 and the signal receiving camera 208 can be products that are currently available on the market.

[0024] Example 2: Refer to Figures 1-8 A laser density detection device for Oxford cloth fabric includes a top plate 1, a movable frame 2 slidably mounted on the top plate 1, two sliders 3 slidably connected to the bottom of the movable frame 2, and a vertical plate 205 fixedly connected to the bottom of the movable frame 2. The bottom of the vertical plate 205 has a mounting plate 206, a laser emitter 207 is located in the middle of the mounting plate 206, and signal receiving cameras 208 inclined and cooperating with the laser emitter 207 are located on both sides of the mounting plate 206. Fixing blocks 302 are provided on both sides of the sliders 3. A connecting block 305 is slidably connected to the bottom of the fixed block 302. A support plate 306 is provided at the bottom of the connecting block 305. A flattening roller 307 is rotatably connected to the support plate 306. Furthermore, three sets of support ears 201 are fixedly provided at the bottom of the movable frame 2. A threaded rod 203 is rotatably connected between the middle set of support ears 201. A limit rod 204 is provided between the two sets of support ears 201 on both sides. The threads at both ends of the threaded rod 203 have opposite directions. Two sliders 3 are threadedly connected to both ends of the threaded rod 203.

[0025] A motor 202 is provided on one of the support ears 201 in the middle group, and a threaded rod 203 is provided at the output end of the motor 202. A support rod 301 is provided on the outer wall of the slider 3, and the support rod 301 is slidably connected to the limit rod 204.

[0026] In this embodiment, during operation, the motor 202 is started, driving the threaded rod 203 at its output end to rotate. When the threaded rod 203 rotates, it can drive the slider 3 threadedly connected to it to move. Since the threads at both ends of the threaded rod 203 have opposite directions of rotation, and the two sliders 3 are respectively threadedly connected to the threads with opposite directions of rotation at both ends, the two sliders 3 can move closer or further away from each other at the same time. When flattening the Oxford cloth, the first step is to control the moving frame 2 to move downward so that the flattening roller 307 tightly presses the Oxford cloth fabric. Then, the motor 202 is started to drive the threaded rod 203 to rotate, thereby causing the two sliders 3 to move further away from each other at the same time. Under the action of the support rod 301, the fixing block 302 and the connecting block 305, the flattening roller 307 is driven to move further away from each other at the same time, thereby flattening the Oxford cloth fabric. Then, the density can be detected by the laser emitter 207 and the signal receiving camera 208.

[0027] Reference Figures 4-8 The fixing block 302 is fixedly installed at the end of the support rod 301 away from the slider 3. The bottom of the fixing block 302 is provided with an insert block 303, and the bottom of the insert block 303 is provided with a slide plate 304. The slide plate 304 is slidably connected in the connecting block 305.

[0028] Reference Figures 4-8 Two guide posts 308 are fixedly installed inside the connecting block 305. The slide plate 304 is slidably connected to the guide posts 308. Springs 309 are connected between the upper and lower ends of the slide plate 304 and the upper and lower inner walls of the connecting block 305, respectively. The springs 309 are sleeved on the outer wall of the guide posts 308. Multiple thin rods 310 are fixedly connected to the connecting block 305. The thin rods 310 are slidably inserted into the fixed block 302.

[0029] In this embodiment, when the movable frame 2 moves downward, the flattening roller 307 first contacts the Oxford cloth fabric. Then, as the movable frame 2 continues to move downward, a sliding connection is formed between the fixed block 302 and the connecting block 305. Specifically, the insert block 303 and the slide plate 304 move downward within the connecting block 305. At the same time, the guide post 308 limits the movement of the slide plate 304, making its movement more stable. Simultaneously, when the slide plate 304 moves downward, it also presses the spring 309 at the bottom of the slide plate 304 and stretches the spring 309 at the top of the slide plate 304. Under the action of the two springs 309, a certain amount of buffering and pressure is provided for the movement of the slide plate 304. When the movable frame 2 moves upward to reset, the two springs 309 also enable the slide plate 304 to drive the insert block 303 and the fixed block 302 to automatically reset.

[0030] Example 3: Refer to Figures 1-8A laser density detection device for Oxford cloth fabric includes a top plate 1, a movable frame 2 slidably mounted on the top plate 1, two sliders 3 slidably connected to the bottom of the movable frame 2, and a vertical plate 205 fixedly connected to the bottom of the movable frame 2. The bottom of the vertical plate 205 has a mounting plate 206, a laser emitter 207 is located in the middle of the mounting plate 206, and signal receiving cameras 208 inclined and cooperating with the laser emitter 207 are located on both sides of the mounting plate 206. Fixing blocks 302 are provided on both sides of the sliders 3, connecting blocks 305 are slidably connected to the bottom of the fixing blocks 302, a support plate 306 is provided at the bottom of the connecting blocks 305, and a flattening roller 307 is rotatably connected to the support plate 306. Furthermore, the connecting blocks 305 have an extension plate 4, a connecting shaft 401 is provided on the extension plate 4, an inclined plate 402 is rotatably connected to the connecting shaft 401, an inclined block 403 is fixedly mounted on the inclined plate 402, and a pressing plate 404 is provided on the inclined block 403.

[0031] A limiting block 405 is slidably connected inside the inclined block 403. Multiple elastic elements 406 are provided between the limiting block 405 and the inner wall of the inclined block 403. A pressure switch 407 is fixedly installed on the inner wall of the limiting block 405. A heating plate 408 is provided inside the pressure plate 404. The pressure switch 407 is electrically connected to the heating plate 408.

[0032] In this embodiment, when the pressing roller 307 contacts the Oxford cloth fabric, the pressing plate 404 also contacts the Oxford cloth fabric. When the moving frame 2 moves downward again, not only will the fixed block 302 and the connecting block 305 slide, but the limiting block 405 on the pressing plate 404 will also slide within the inclined block 403. The elastic element 406 can provide a certain buffer. At the same time, when the limiting block 405 moves, it will also press the pressure switch 407, thereby causing the pressure switch 407 to send a signal to heat the heating plate 408. This allows the heated pressing plate 404 to heat the Oxford cloth fabric, thereby better flattening the Oxford cloth fabric, softening the Oxford cloth fibers, eliminating wrinkles and internal stress, making it easier to flatten. At the same time, after flattening, the fabric surface is flat, the yarn arrangement is neat, and the laser detection is more accurate.

[0033] Furthermore, the inclined plate 402 can rotate on the connecting block 305, which provides space for the movement of the inclined plate 402 and avoids excessive pressure that could cause jamming. In addition, a cover plate is provided on the outer wall of the connecting block 305, which can limit the rotation angle of the inclined plate 402, making it more convenient to use.

[0034] The laser emitter 207 has multiple laser emitters arranged in a linear distribution, and the signal receiving camera 208 has two sets. The two sets of signal receiving cameras 208 are respectively set on both sides of the laser emitter 207. Each set of signal receiving cameras 208 has multiple laser emitters arranged in a linear distribution. By setting multiple sets of laser emitters 207 and multiple sets of signal receiving cameras 208, the detection results can be made more accurate.

[0035] A cylinder 103 is provided on the top plate 1, and a movable frame 2 is provided at the output end of the cylinder 103. Multiple horizontal plates 101 are fixedly provided on the outer wall of the top plate 1. Support legs 102 are provided at the bottom of the horizontal plates 101. The movable frame 2 can be moved by the cylinder 103. The horizontal plates 101 and the support legs 102 can support the entire device and make it easy to place.

[0036] Example 4: A laser method for detecting the density of Oxford cloth fabric, comprising the following steps: Step 1: Place the prepared Oxford cloth fabric under the device; Step 2: Control the moving frame 2 to move downwards so that the flattening roller 307 comes into contact with the Oxford cloth fabric; Step 3: Continue to control the moving frame 2 to move downwards, so that pressure is generated between the flattening roller 307 and the Oxford cloth fabric; Step 4: Control the two sliders 3 to move away from each other simultaneously, thereby driving the two flattening rollers 307 to move away from each other to flatten the Oxford cloth fabric. Step 5: Activate the laser emitter 207 to emit a stable and uniform linear laser beam onto the flat surface of the Oxford cloth. The laser beam is reflected by the cloth to form an optical signal with alternating brightness and darkness and periodic changes. The signal receiving camera 208 will collect the reflected light signal in real time and convert the optical image into an electrical signal and a digital image. The control system in the external control panel identifies the number of brightness and darkness cycles through image processing algorithms and finally calculates the number of yarns per unit length, i.e., the fabric density.

[0037] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A laser detection device for the density of Oxford cloth fabric, comprising a top plate (1), characterized in that, Also includes: A movable frame (2) is slidably mounted on the top plate (1), and two sliders (3) are slidably connected to the bottom of the movable frame (2). A vertical plate (205) is fixedly connected to the bottom of the mobile frame (2). A mounting plate (206) is provided at the bottom of the vertical plate (205). A laser emitter (207) is provided in the middle of the mounting plate (206). Signal receiving cameras (208) are provided on both sides of the mounting plate (206) and are inclined and cooperate with the laser emitter (207). Both sides of the slider (3) are provided with fixing blocks (302), and the bottom of the fixing blocks (302) is slidably connected to a connecting block (305). The bottom of the connecting block (305) is provided with a support plate (306), and a flattening roller (307) is rotatably connected to the support plate (306).

2. The laser detection device for the density of Oxford cloth fabric according to claim 1, characterized in that, The bottom of the movable frame (2) is fixedly provided with three sets of support ears (201). A threaded rod (203) is rotatably connected between the middle set of support ears (201). A limit rod (204) is provided between the two sets of support ears (201) on both sides. The threads at both ends of the threaded rod (203) are opposite in direction. The two sliders (3) are respectively threaded to both ends of the threaded rod (203).

3. The laser detection device for the density of Oxford cloth fabric according to claim 2, characterized in that, A motor (202) is provided on one of the support ears (201) in the middle group. The threaded rod (203) is provided at the output end of the motor (202). A support rod (301) is provided on the outer wall of the slider (3). The support rod (301) is slidably connected to the limiting rod (204).

4. The laser density detection device for Oxford cloth fabric according to claim 3, characterized in that, The fixing block (302) is fixedly installed at one end of the support rod (301) away from the slider (3). The bottom of the fixing block (302) is provided with an insert block (303), and the bottom of the insert block (303) is provided with a sliding plate (304). The sliding plate (304) is slidably connected in the connecting block (305).

5. The laser detection device for the density of Oxford cloth fabric according to claim 4, characterized in that, Two guide posts (308) are fixedly installed inside the connecting block (305). The sliding plate (304) is slidably connected to the guide posts (308). Springs (309) are connected between the upper and lower ends of the sliding plate (304) and the upper and lower inner walls of the connecting block (305), respectively. The springs (309) are sleeved on the outer wall of the guide posts (308). Multiple thin rods (310) are fixedly connected to the connecting block (305). The thin rods (310) are slidably inserted into the fixed block (302).

6. The laser density detection device for Oxford cloth fabric according to claim 1, characterized in that, The connecting block (305) is provided with an extension plate (4), the extension plate (4) is provided with a connecting shaft (401), the connecting shaft (401) is rotatably connected with an inclined plate (402), the inclined plate (402) is fixedly provided with an inclined block (403), and the inclined block (403) is provided with a pressure plate (404).

7. The Oxford cloth fabric density laser detection device according to claim 6, characterized in that, A limiting block (405) is slidably connected inside the inclined block (403). Multiple elastic elements (406) are provided between the limiting block (405) and the inner wall of the inclined block (403). A pressure switch (407) is fixedly provided on the inner wall of the limiting block (405). A heating plate (408) is provided inside the pressure plate (404). The pressure switch (407) is electrically connected to the heating plate (408).

8. The laser detection device for the density of Oxford cloth fabric according to claim 1, characterized in that, The laser emitter (207) has multiple linearly distributed components, and the signal receiving camera (208) has two sets, which are respectively set on both sides of the laser emitter (207). Each set of signal receiving cameras (208) has multiple linearly distributed components.

9. The laser detection device for the density of Oxford cloth fabric according to claim 1, characterized in that, The top plate (1) is provided with a cylinder (103), the movable frame (2) is located at the output end of the cylinder (103), and multiple horizontal plates (101) are fixedly provided on the outer wall of the top plate (1). The bottom of the horizontal plate (101) is provided with a support leg (102).

10. A laser method for detecting the density of Oxford cloth fabric, comprising the laser detection device for Oxford cloth fabric density as described in any one of claims 1-9, characterized in that, Follow these steps: Step 1: Place the prepared Oxford cloth fabric under the device; Step 2: Control the moving frame (2) to move downwards so that the flattening roller (307) comes into contact with the Oxford cloth fabric; Step 3: Continue to control the moving frame (2) to move downwards, so that pressure is generated between the flattening roller (307) and the Oxford cloth fabric; Step 4: Control the two sliders (3) to move away from each other at the same time, thereby driving the two pressing rollers (307) to move away from each other to flatten the Oxford cloth fabric; Step 5: Activate the laser emitter (207) to emit a stable and uniform linear laser beam onto the flat surface of the Oxford cloth. The laser beam is reflected by the cloth to form an optical signal with alternating brightness and periodic changes. The signal receiving camera (208) will collect the reflected light signal in real time and convert the optical image into an electrical signal and a digital image. The control system in the external control panel identifies the number of brightness and darkness cycles through image processing algorithms and finally calculates the number of yarns per unit length, i.e., the fabric density.

Images