Full-automatic friction testing device for billiard table cloth

Abstract

The invention relates to the technical field of billiard table cloth testing, in particular to a full-automatic friction testing device for billiard table cloth, which comprises a bearing table plate, a cloth tightening mechanism, a transverse sliding rail, a sliding table, an industrial camera, a range finder and a controller. The frame-shaped groove is formed in the bearing table plate and is in embedded type pressing fit with the cloth tightening mechanism, it is ensured that the to-be-tested billiard table cloth can be flatly and compactly fixed, the cylinder is arranged to drive the tested billiard balls to roll on the billiard table cloth, the simulation friction test of the billiard table cloth is achieved, and the test efficiency is improved. The friction test is closer to the actual use condition of the billiard table cloth, meanwhile, real-time detection data collection of the industrial camera and the distance measuring instrument and automatic judgment of the controller are introduced, full-automatic billiard table cloth friction test is achieved, the friction test efficiency is greatly improved, and the test cost is reduced. And the accuracy of a test result is improved through a simulation type friction test.

Description

Technical Field

[0001] This invention relates to the field of billiard table cloth testing technology, and in particular to a fully automatic friction testing device for billiard table cloths. Background Technology

[0002] Billiard table cloth, also known as billiard mat, is typically green velvet and is the special surface covering material for billiard tables. Its main material is wool or a wool blend, and it uses a precise weaving process to create a uniform pile structure that directly affects the rolling speed, spin, and final landing point of the billiard ball. During production, a wool-nylon blend is usually used, and the fabric undergoes double-sided thickening treatment. A dense pile is created through dense weaving of warp and weft yarns, and a reverse-pile process is used to unify the fiber direction, ensuring the stability of the ball's rolling trajectory while enhancing the abrasion resistance of the billiard table cloth. However, during the use of billiard table cloth, as the number of times the billiard ball rubs against it increases, the pile structure of the billiard table cloth is gradually worn away, making it impossible to ensure the stability of the ball's rolling trajectory. Therefore, friction tests are necessary to determine the service life of the billiard table cloth and to provide accurate data for improving the weaving process.

[0003] Currently, friction testing of billiard table cloths is mainly divided into usage testing and the Martindale abrasion resistance test. Usage testing involves installing the billiard table cloth on a billiard table and conducting normal billiard play. The lifespan and abrasion resistance of the cloth are estimated based on the change in the surface friction coefficient before and after the test. Martindale abrasion resistance testing involves cutting the billiard table cloth into test discs and fixing them on a specialized machine for friction testing under a constant pressure. The friction method of Martindale abrasion resistance testing differs significantly from the friction method of billiard play, resulting in a large deviation between the test results and the actual usage of the billiard table cloth. While usage testing is closer to the actual usage of the billiard table cloth in terms of friction method, it is time-consuming and affected by the tester's hitting habits and the accuracy of the calculated surface friction coefficient change. This often leads to significant differences in results for the same billiard table cloth, making it impossible to obtain accurate friction test data. Summary of the Invention

[0004] To address this issue, the present invention provides a fully automatic friction testing device for billiard table cloths, which solves the problem of inaccurate friction testing due to significant differences between existing billiard table cloth friction tests and actual use of billiard table cloths.

[0005] To achieve the above objectives, the present invention provides a fully automatic friction testing device for billiard table cloths, comprising a support tabletop, a cloth stretching mechanism, and a sliding table; The support tabletop has a frame-shaped groove, and a horizontal slide rail is provided on one side of the support tabletop. The cloth stretching mechanism includes a cloth pressing frame and several cloth pullers. The cloth pressing frame has the same shape as the frame-shaped groove and can press the billiard table cloth laid in the frame-shaped groove into the frame-shaped groove and fix it. Each cloth puller is set around the frame-shaped groove on the support table plate and is used to stretch the billiard table cloth laid in the frame-shaped groove by rotating the rubber roller. The slide table is set on a horizontal slide rail and can move horizontally back and forth on the horizontal slide rail. A cylindrical tube is set on the slide table to hold the test billiard ball. The cylindrical tube extends into the frame-shaped groove area through an extension plate. The horizontal movement of the slide table causes the test billiard ball inside the cylindrical tube to roll on the billiard table cloth to perform friction test.

[0006] Furthermore, the frame-shaped groove is set as a rectangle, and the grooves on both long sides of the rectangle extend outwards, and the upper edge of the frame-shaped groove is chamfered.

[0007] Furthermore, the cross-sectional width of the pressing frame is smaller than the cross-sectional width of the frame-shaped groove, and the cross-sectional thickness of the pressing frame is greater than the cross-sectional depth of the frame-shaped groove.

[0008] Furthermore, one side of the pressing frame is connected to the surface of the supporting table via several hinges, and the other side of the pressing frame is provided with several locking rings, each of which can be matched and engaged with several locking latches provided on the supporting table.

[0009] Furthermore, the fabric spreader includes a base plate, a drive motor, a rotating bracket, and a rubber roller; The base plate is connected to the supporting table plate by bolts. The rotating bracket consists of two symmetrically arranged rotating arms. One end of the rotating arm is hinged to the base plate, and the other end is hinged to the rotating shaft at the end of the rubber roller. A telescopic rod is also provided on one side of the rotating arm. One end of the telescopic rod is hinged to the rotating arm, and the other end is hinged to the base plate. The drive motor is mounted on the base plate between the two rotating arms. A transmission gear is also mounted on the shaft at one end of the rubber roller. The transmission gear meshes with the drive gear on one side of the drive motor, and the drive motor drives the rubber roller to rotate.

[0010] Furthermore, the slide table includes a square plate, a base plate, an extension plate, and a cylindrical tube; The bottom of the square plate is connected to the transverse slide rail. The support platform is set on the square plate, and the extension plate is slidably set on the support platform. The extension plate can move horizontally and longitudinally relative to the support platform. The cylindrical tube is set at the front end of the extension plate, and both sides of the cylindrical tube are open.

[0011] Furthermore, the cylindrical tube extends above the frame-shaped groove area through the extension plate. The bottom of the cylindrical tube is suspended and does not contact the supporting table. The distance from the bottom surface of the cylindrical tube to the supporting table is less than the radius of the test ball, and the inner diameter of the cylindrical tube is greater than the diameter of the test ball.

[0012] Furthermore, it also includes an industrial camera and a rangefinder, both of which are mounted on the outside of the cylindrical tube; Industrial cameras are used to acquire image data of the billiard tablecloth in real time; rangefinders are used to acquire distance data from the rangefinder's own position to the billiard tablecloth in real time.

[0013] Furthermore, it also includes a controller, which is connected to an industrial camera and a rangefinder respectively, to obtain the real-time color value of the billiard table cloth based on the image data collected by the industrial camera, and to calculate the real-time difference distance based on the distance data collected by the rangefinder. Among them, the real-time difference distance is the absolute value of the difference between the real-time distance from the rangefinder to the billiard table cloth and the distance from the rangefinder to the billiard table cloth before the friction test begins.

[0014] Furthermore, the controller can control the movement speed and start / stop of the slide table on the transverse slide rail; The controller can be set with a final color value and a maximum difference distance. The controller can stop the slide from moving when the real-time color value is less than or equal to the final color value or when the real-time difference distance is greater than the maximum difference distance, thus completing the test.

[0015] Compared with existing technologies, the advantages of this invention are as follows: by creating a frame-shaped groove on the support plate and embedding it with the cloth-stretching mechanism, the billiard cloth to be tested is ensured to be fixed flat and tightly. The cloth-stretching mechanism also facilitates the installation and unloading of the billiard cloth. By setting a slide table to move on a transverse slide rail and using a cylindrical tube to drive the test ball to roll on the billiard cloth, a simulated friction test of the billiard cloth is achieved, making the friction test closer to the actual use of the billiard cloth. Furthermore, the movement speed of the slide table on the transverse slide rail can be set, allowing the slide table to simulate various striking methods based on different movement speeds. Moreover, by introducing real-time detection with an industrial camera and rangefinder, and automatic judgment by the controller, not only is the efficiency of the friction test greatly improved, but also a simulated use-type billiard cloth friction test is achieved, improving the accuracy of the test results. Attached Figure Description

[0016] Figure 1 This is a top view of the fully automatic friction testing device for billiard table cloths in this embodiment; Figure 2 This is a side cross-sectional view of the fully automatic friction testing device for billiard table cloths in this embodiment; Figure 3 This is a top view of the fabric spreader in this embodiment; Figure 4 This is a side view of the fabric spreader in this embodiment.

[0017] Reference numerals: 1. Supporting table, 101. Frame-shaped groove, 21. Fabric pressing frame, 211. Hinge, 212. Locking ring, 213. Lock, 20. Fabric puller, 201. Base plate, 202. Drive motor, 203. Rotary arm, 204. Rubber roller, 205. Telescopic rod, 206. Transmission gear, 207. Drive gear, 3. Transverse slide rail, 4. Slide table, 401. Square plate, 402. Support platform, 403. Extension plate, 404. Cylindrical tube, 405. Sliding motor, 406. Extension motor, 5. Industrial camera, 6. Rangefinder, 7. Controller, 8. Test table ball. Detailed Implementation

[0018] To make the objectives and advantages of the present invention clearer, the present invention will be further described below with reference to embodiments; it should be understood that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the present invention.

[0019] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0020] It should be noted that in the description of this invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc., which indicate directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and is not intended to indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this invention.

[0021] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0022] Please see Figure 1 and Figure 2 As shown, this embodiment provides a fully automatic friction testing device for billiard table cloth, including a support table plate 1, a cloth stretching mechanism, a transverse slide rail 3, a slide table 4, an industrial camera 5, a rangefinder 6, and a controller 7. A cloth-stretching mechanism is provided on the support table 1 to fix the billiard table cloth to be tested flat on the support table 1. A transverse slide rail 3 is also provided on the support table 1, and a slide table 4 is provided on the transverse slide rail 3. The slide table 4 can move horizontally back and forth on the transverse slide rail 3. The slide table 4 can drive the test billiard ball 8 to roll on the billiard table cloth to be tested by reciprocating on the transverse slide rail 3, so as to carry out the friction test of the billiard table cloth. At the same time, an industrial camera 5 and a rangefinder 6 are also provided on the slide table 4. The industrial camera 5 and the rangefinder 6 can detect the billiard table cloth in real time and transmit the data to the controller 7 for data collection during the friction test process.

[0023] Specifically, the support table 1 is a rectangular plate structure, the horizontal slide rail 3 is set on the edge of one side of the long side of the support table 1, and a frame-shaped groove 101 is opened on the surface of the support table 1, and the upper edge of the frame-shaped groove 101 is chamfered. The cloth stretching mechanism includes a cloth pressing frame 21 and several cloth pullers 20. The cloth pressing frame 21 has the same shape as the frame-shaped groove 101 and can be embedded into the frame-shaped groove 101 of the supporting table board 1. One side of the cloth pressing frame 21 is connected to the surface of the supporting table board 1 by several hinges 211, and the other side of the cloth pressing frame 21 is provided with several locking rings 212. Each locking ring 212 can engage with several locking latches 213 provided on the surface of the supporting table board 1. When the cloth pressing frame 21 is pressed into the frame-shaped groove 101, the locking rings 212 of the cloth pressing frame 21 are engaged by the locking latches 213 to ensure that the cloth pressing frame 21 and the frame-shaped groove 101 are tightly pressed together. The function of the cloth pressing frame 21 is to press the billiard table cloth to be tested into the frame-shaped groove 101 of the supporting table board 1, so that the billiard table cloth to be tested is flat and stable. Therefore, to ensure that the billiard table cloth can be smoothly pressed into the frame-shaped groove 101, the cross-sectional width of the pressing frame 21 is smaller than the cross-sectional width of the frame-shaped groove 101. In order to make the pressure of the pressing frame 21 on the billiard table cloth pressed into the frame-shaped groove 101 more even, the pressing frame 21 should be slightly higher than the plane of the supporting table board 1 after being pressed into the frame-shaped groove 101, so that each hinge 211 and each locking ring 212 can apply pressure to the pressing frame 21. The cross-sectional thickness of the pressing frame 21 is greater than the cross-sectional depth of the frame-shaped groove 101. At the same time, a chamfer is provided at the upper edge of the frame-shaped groove 101, which makes it easier for the billiard table cloth to be pressed into the frame-shaped groove 101 without damaging the billiard table cloth. This avoids the problem of uneven force on the billiard table cloth caused by tearing when the billiard table cloth is pressed into the frame-shaped groove 101. Each cloth puller 20 is installed on the support table plate 1 and distributed on the outer periphery of the frame-shaped groove 101. The cloth puller 20 is equipped with a rubber roller 204. The rotation of the rubber roller 204 is used to pull the billiard table cloth and adjust the billiard table cloth to be flat.

[0024] In this embodiment, the pressing frame 21 is welded from 20mm×20mm square steel. The width of the frame-shaped groove 101 is set to 28mm, and the depth is set to 15mm. The pressing frame 21 is connected to the supporting table plate 1 via four hinges 211 on the side near the transverse slide rail 3, allowing the pressing frame 21 to rotate relative to the supporting table plate 1 and lift one side, facilitating the unloading and installation of the billiard table cloth. Three locking rings 212 are welded to the side of the pressing frame 21 away from the transverse slide rail 3. Three locking latches 213 are provided at corresponding positions on the support table 1; in this embodiment, a total of four cloth pullers 20 are provided. One cloth puller 20 is provided on each side of the short side of the cloth pressing frame 21, and two cloth pullers 20 are provided on the locking ring 212 side of the cloth pressing frame 21. No cloth pullers 20 are provided on the hinge 211 side of the cloth pressing frame 21. Since the cloth pressing frame 21 will be pressed into the frame-shaped groove 101 on the hinge 211 side to form a fixed position, there is no need to add cloth pullers 20 to adjust the flatness of the billiard table cloth.

[0025] In this embodiment, the frame of the frame-shaped groove 101 is rectangular, and the grooves on both long sides of the rectangle extend outwards. On the one hand, this prevents the billiard table cloth from piling up at the inner corners of the frame-shaped groove 101 when the pressing frame 21 is fully pressed into the frame-shaped groove 101, thus preventing the pressing frame 21 from being unable to lie flat. On the other hand, it is also suitable for leveling the billiard table cloth in manual mode. When leveling in manual mode, it is not necessary to install the pressing frame 21, the cloth puller 20, and the locking clip 213 on the supporting table plate 1. Simply lay the billiard table cloth flat on the frame-shaped groove 101, press the iron strip into the two long sides of the frame-shaped groove 101, and fix it with bolts.

[0026] Please continue reading. Figure 3 and Figure 4 As shown, specifically, the fabric spreader 20 includes a base plate 201, a drive motor 202, a rotating bracket, and a rubber roller 204. The base plate 201 is connected to the supporting table 1 by bolts. The rotating bracket consists of two symmetrically arranged rotating arms 203. One end of each rotating arm 203 is hinged to the base plate 201, and the other end is hinged to the rotating shaft at the end of the rubber roller 204. A telescopic rod 205 is also provided on one side of each rotating arm 203. One end of the telescopic rod 205 is hinged to the rotating arm 203, and the other end is hinged to the base plate 201. The telescopic rod 205 extends and retracts, causing the rotating arm 203 to rotate, thereby controlling the position of the rubber roller 204. The drive motor 202 is mounted on the base plate 201 and is located between the two symmetrical rotating arms 203 of the rotating bracket. The rubber roller 204 can rotate axially on the rotating bracket. A transmission gear 206 is also mounted on the rotating shaft at one end of the rubber roller 204. The transmission gear 206 meshes with the drive gear 207 on one side of the drive motor 202, thereby driving the rubber roller 204 to rotate through the drive motor 202.

[0027] Specifically, the slide table 4 includes a square plate 401, a support platform 402, an extension plate 403, and a cylindrical tube 404. The bottom of the square plate 401 is connected to the transverse slide rail 3. A sliding motor 405 is provided on one side of the transverse slide rail 3. The sliding motor 405 is used to drive the square plate 401 to move horizontally on the transverse slide rail 3. A traditional linear sliding module is adopted, and either screw drive or belt drive can be used, depending on the actual situation. A support platform 402 is provided on the square plate 401, and an extension plate 403 is slidably provided on the support platform 402. The extension plate 403 extends above the frame-shaped groove 101 area supporting the table board 1. An extension motor 406 is also provided on one side of the support platform 402. The extension motor 406 is used to drive the extension plate 403 to move horizontally and longitudinally on the support platform 402 to adjust the test position of the billiard table cloth. The extension plate 403 and the support platform 402 are slidably connected. In this embodiment, the extension plate 403 is electrically controlled to achieve extension and retraction. It can also be manually pulled out, depending on the actual situation. In this embodiment, the extension plate 403 is provided with a sliding groove. A fixing pin passes through the sliding groove to fix the extension plate 403 to the support platform 402. A rack is provided at the bottom of the extension plate 403, and a protruding gear is provided on the support platform 402. The protruding gear meshes with the rack at the bottom of the extension plate 403. The extension motor 406 controls the protruding gear to rotate forward or backward to achieve the extension and retraction of the extension plate 403.

[0028] A cylindrical tube 404 is positioned at the front end of the extension plate 403. Both sides of the cylindrical tube 404 are open. The top of the cylindrical tube 404 is connected to the front end of the extension plate 403, and the bottom of the cylindrical tube 404 is suspended and does not contact the supporting table plate 1. The distance from the bottom surface of the cylindrical tube 404 to the supporting table plate 1 is less than the radius of the test ball 8. The inner diameter of the cylindrical tube 404 is greater than the diameter of the test ball 8, ensuring that the test ball 8 rolls freely along the tablecloth plane under the action of the cylindrical tube 404. In this embodiment, in order to facilitate the control of the rolling direction of the test ball 8, the inner diameter of the cylindrical tube 404 cannot be set too long. In this embodiment, the inner diameter of the cylindrical tube 404 is set to 112% of the diameter of the test ball 8.

[0029] In this embodiment, an industrial camera 5 and a rangefinder 6 are also provided on the outer side of the cylindrical tube 404. The industrial camera 5 is used to detect the image data of the billiard table cloth in real time and transmit the data to the controller 7. The controller 7 determines whether the friction test of the billiard table cloth is completed by color comparison. The rangefinder 6 is used to detect the real-time distance from the position of the rangefinder 6 to the surface of the billiard table cloth and transmit the data to the controller 7. During the process of fixing the billiard table cloth on the machine, the controller 7 uses the real-time distance data detected by the rangefinder 6 to help determine the flatness of the billiard table cloth. During the friction test of the billiard table cloth, the controller 7 uses the real-time distance data detected by the rangefinder 6 to determine whether the billiard table cloth is loose or bulging.

[0030] In this embodiment, the process of fixing the billiard table cloth on the machine is as follows: Open the latches 213 on one side of the cloth-pressing frame 21 to separate the latches 213 from the locking rings 212; lift the cloth-pressing frame 21 so that it rotates via the hinges 211; place the cloth-pressing frame 21 against the transverse slide rail 3; take the billiard table cloth to be tested and lay it on the surface of the supporting table board 1, ensuring the cloth covers the frame-shaped groove 101; gently push the cloth towards the hinges 211 on one side of the cloth-pressing frame 21, so that one side of the cloth abuts against the base of each hinge 211; lower the cloth-pressing frame 21 without pressing, allowing it to press down by its own weight; at this time, the rangefinder 6 on the outside of the cylindrical tube 404 of the slide table 4 detects and scans the real-time distance data of the billiard table cloth within the frame-shaped groove 101. The slide table 4 moves horizontally on the transverse slide rail 3 and the extension plate 403 moves horizontally on the support platform 402. The controller 7 generates a planar height map of the billiard table cloth based on the real-time distance data scanned by the rangefinder 6, which is displayed on the monitor of the controller 7. According to the planar height map of the billiard table cloth, small uneven areas of the billiard table cloth can be easily found. By controlling the corresponding cloth puller 20, the telescopic rod 205 is retracted, and the rubber roller 204 is lowered, so that the rubber roller 204 presses the billiard table cloth onto the support table plate 1. The drive motor 202 is started, so that the rubber roller 204 rotates and the billiard table cloth is evenly and slowly flattened by friction. After the flatness adjustment of the billiard table cloth is completed, the locking ring 212 of the cloth pressing frame 21 is pressed down, so that the cloth pressing frame 21 is inserted into the frame-shaped groove 101, and the locking lock 213 is engaged with the locking ring 212, thus completing the mounting and fixing of the billiard table cloth.

[0031] In this embodiment, the friction test process of the billiard table cloth is as follows: After the billiard table cloth is fixed on the machine, the extension plate 403 is extended or retracted according to the test position, so that the cylindrical tube 404 is directly above the test position of the billiard table cloth. The test billiard ball 8 is put into the cylindrical tube 404. The moving speed of the slide table 4 on the transverse slide rail 3 is set, and the sliding motor 405 is started, so that the cylindrical tube 404 of the slide table 4 drives the test billiard ball 8 to move back and forth transversely on the billiard table cloth to start the friction test. The final color value Sf and the maximum difference distance La are set in the controller 7. The industrial camera 5 is activated to detect the image data of the billiard table cloth in real time and obtain the real-time color value Se. The rangefinder 6 is activated to detect the distance Ls of the billiard table cloth plane in real time, and the real-time difference distance Le is calculated by the controller 7, Le=|Ls-Lc|, where Lc is the distance from the rangefinder 6 to the billiard table cloth plane before the friction test starts. Controller 7 compares the real-time color value Se with the final color value Sf in real time. If the real-time color value Se > the final color value Sf, the controller 7 determines that the friction test is proceeding normally. If the real-time color value Se ≤ the final color value Sf, the controller 7 determines that the billiard table cloth has reached the set value, turns off the sliding motor 405, and records the number of times the slide table 4 moves back and forth as the test result output. At the same time, controller 7 will also compare the real-time difference distance Le with the maximum difference distance La in real time. If the real-time difference distance Le ≤ the maximum difference distance La, the controller 7 determines that the friction test is proceeding normally. If the real-time difference distance Le > the maximum difference distance La, the controller 7 determines that the billiard table cloth has a defect, shuts down the sliding motor 405, and records the number of times the slide table 4 moves back and forth as the test result output.

[0032] In this embodiment, the surface color of the billiard table cloth gradually lightens after being rubbed by billiard balls, eventually leaving a white mark. The degree of friction of the billiard table cloth is determined by the real-time color value of the cloth, achieving automated friction-based stop control. It should be noted that this embodiment uses an industrial camera 5 to acquire the color value of the billiard table cloth, requiring stable and unchanging light in the test environment. The color value is represented using standard RGB values. By determining the real-time difference distance, it is possible to effectively identify wrinkles and bulges caused by excessive stretching of the billiard table cloth during the friction test, improving the accuracy of the billiard table cloth friction test.

[0033] In summary, the fully automatic friction testing device for billiard table cloths in this embodiment ensures that the billiard table cloth to be tested is fixed flat and tightly by opening a frame-shaped groove 101 on the supporting table plate 1 and embedding it with the cloth stretching mechanism. The cloth stretching mechanism also facilitates the installation and unloading of the billiard table cloth. By setting the slide table 4 to move on the transverse slide rail 3 and setting the cylindrical tube 404 to drive the test billiard ball 8 to roll on the billiard table cloth, a simulated friction test of the billiard table cloth is achieved, making the friction test closer to the actual use of the billiard table cloth. Furthermore, the movement speed of the slide table 4 on the transverse slide rail 3 can be set, allowing the slide table 4 to simulate various hitting methods according to different movement speeds. Moreover, by introducing real-time detection from the industrial camera 5 and the rangefinder 6, and automatic judgment from the controller 7, a fully automatic billiard table cloth friction test is achieved. This fully automatic friction testing device for billiard table cloths in this embodiment not only greatly improves the efficiency of friction testing but also realizes a simulated use type of billiard table cloth friction test, improving the accuracy of the test results.

[0034] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of the present invention.

[0035] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A fully automatic friction testing device for billiard table cloths, characterized in that, This includes the supporting tabletop, the fabric-stretching mechanism, and the sliding table; A frame-shaped groove is provided on the surface of the support table, and a transverse slide rail is provided on one side of the support table. The fabric stretching mechanism includes a fabric pressing frame and several fabric pullers. The fabric pressing frame has the same shape as the frame-shaped groove and can press the billiard table cloth laid in the frame-shaped groove into the frame-shaped groove for fixation. Each of the fabric pullers is arranged around the frame-shaped groove on the support table plate and is used to flatten the billiard table cloth laid in the frame-shaped groove by rotating the rubber roller. The slide table is mounted on the transverse slide rail and can move horizontally back and forth on the transverse slide rail. The slide table is provided with a cylindrical tube that can hold the test billiard ball. The cylindrical tube extends into the frame-shaped groove area through an extension plate. The horizontal movement of the slide table causes the test billiard ball inside the cylindrical tube to roll on the billiard table cloth to perform friction testing.

2. The fully automatic friction testing device for billiard table cloths according to claim 1, characterized in that, The frame-shaped groove is rectangular, and the grooves on both long sides of the rectangle extend outward. The upper edge of the frame-shaped groove is chamfered.

3. The fully automatic friction testing device for billiard table cloths according to claim 1, characterized in that, The cross-sectional width of the pressing frame is smaller than the cross-sectional width of the frame-shaped groove, and the cross-sectional thickness of the pressing frame is greater than the cross-sectional depth of the frame-shaped groove.

4. The fully automatic friction testing device for billiard table cloth according to claim 1, characterized in that, One side of the pressing frame is connected to the surface of the supporting table via several hinges, and the other side of the pressing frame is provided with several locking rings, each of which can be matched and engaged with several locking latches provided on the supporting table.

5. The fully automatic friction testing device for billiard table cloths according to claim 1, characterized in that, The fabric spreader includes a base plate, a drive motor, a rotating bracket, and the rubber roller; The base plate is connected to the supporting table plate by bolts. The rotating bracket consists of two symmetrically arranged rotating arms. One end of the rotating arm is hinged to the base plate, and the other end is hinged to the rotating shaft at the end of the rubber roller. A telescopic rod is also provided on one side of the rotating arm. One end of the telescopic rod is hinged to the rotating arm, and the other end is hinged to the base plate. The drive motor is mounted on the base plate between the two rotating arms. A transmission gear is also mounted on the rotating shaft at one end of the rubber roller. The transmission gear meshes with the drive gear on one side of the drive motor, thereby driving the rubber roller to rotate.

6. The fully automatic friction testing device for billiard table cloths according to claim 1, characterized in that, The slide table includes a square plate, a support platform, the extension plate, and the cylindrical tube; The bottom of the square plate is connected to the transverse slide rail, the support platform is set on the square plate, the extension plate is slidably set on the support platform, the extension plate can move horizontally and longitudinally relative to the support platform, the cylindrical tube is set at the front end of the extension plate, and both sides of the cylindrical tube are open.

7. The fully automatic friction testing device for billiard table cloths according to claim 6, characterized in that, The cylindrical tube extends through the extension plate to the area above the frame-shaped groove. The bottom of the cylindrical tube is suspended and does not contact the supporting table. The distance from the bottom surface of the cylindrical tube to the supporting table is less than the radius of the test ball, and the inner diameter of the cylindrical tube is greater than the diameter of the test ball.

8. The fully automatic friction testing device for billiard table cloth according to claim 1, characterized in that, It also includes an industrial camera and a rangefinder, both of which are mounted on the outside of the cylindrical tube; The industrial camera is used to acquire image data of the billiard tablecloth in real time; the rangefinder is used to acquire distance data from the rangefinder's own position to the billiard tablecloth in real time.

9. The fully automatic friction testing device for billiard table cloth according to claim 8, characterized in that, It also includes a controller, which is connected to the industrial camera and the rangefinder respectively, and is used to obtain the real-time color value of the billiard table cloth based on the image data collected by the industrial camera, and to calculate the real-time difference distance based on the distance data collected by the rangefinder. The real-time difference distance is the absolute value of the difference between the real-time distance from the rangefinder to the billiard table and the distance from the rangefinder to the billiard table before the friction test begins.

10. The fully automatic friction testing device for billiard table cloth according to claim 9, characterized in that, The controller can control the movement speed and start / stop of the slide table on the transverse slide rail; The controller can set the final color value and the maximum difference distance. The controller can control the slide to stop moving when the real-time color value is less than or equal to the final color value or when the real-time difference distance is greater than the maximum difference distance, thus completing the test.

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