A speckle-spotting device

Abstract

This application provides a speckle pattern fabrication device, relating to the field of deformation measurement technology. The device includes a support base, a transmission component, a drive component, a moving component, and an inkjet component. The transmission component, drive component, and moving component are all mounted on the support base. The support base provides a support platform for the speckle pattern fabrication device, improving the stability of each part of the device. The transmission component moves the workpiece along a preset transmission path, improving the automation level of the device. The moving component, drive component, and inkjet component control the movement path of the inkjet component, improving the accuracy and quality of the speckle pattern fabrication process. By setting the inkjet end of the inkjet component as a flexible element, the inkjet component can be adapted to workpieces with curved surfaces, improving the versatility of the device.

Description

Technical Field

[0001] This application relates to the technical field of deformation measurement, and more particularly to a speckle pattern making apparatus. Background Technology

[0002] Digital Image Correlation (DIC), also known as digital speckle correlation, is a method that uses two digital images of a sample before and after deformation to obtain deformation information of the region of interest through correlation calculations.

[0003] The Digital Image Correlation (DIC) method calculates speckle patterns based on the displacement of the speckle on the sample surface. Therefore, the quality of the speckle on the tested sample surface directly affects the accuracy of the measurement and analysis. High-quality speckle fabrication requires high contrast, randomness, anisotropy, and stability. Existing techniques commonly use speckle fabrication methods such as painting, stencil spraying, roller brushing, and applying transfer stickers to the sample surface. Painting is quick and convenient, suitable for small-sized samples; roller brushing and stencil spraying can be adapted to samples of different sizes, producing repeatable speckle patterns; transfer stickers utilize speckle generation tools provided by software systems, where the sample size and camera parameters are input, and the system automatically generates a standard speckle pattern.

[0004] However, existing speckle fabrication devices suffer from poor speckle production results and are not suitable for curved surface specimens. Summary of the Invention

[0005] This application provides a speckle pattern making apparatus, which improves the quality of speckle pattern making on the surface of a workpiece and realizes speckle pattern making on the surface of a workpiece with a curved surface.

[0006] This application provides a speckle-making apparatus for creating speckles on the surface of a workpiece. The speckle-making apparatus includes a support base, a transmission component, a driving component, a moving component, and an inkjet component.

[0007] The transmission component, drive component, and moving component are all mounted on the support base. The transmission component is used to place the workpiece and drive the workpiece to move along a preset transmission path. The inkjet component is connected to the moving component, and the inkjet end of the inkjet component faces the transmission component. The inkjet end of the inkjet component is a flexible spring.

[0008] The drive unit is connected to the moving component and is used to drive the inkjet unit to move toward or away from the transmission component.

[0009] In the above-mentioned speckle fabrication apparatus, optionally, the inkjet assembly includes an inkjet tube and an inkjet head, the inkjet tube and the inkjet head are connected to each other, the inkjet tube is connected to the moving assembly, the inkjet head faces the transmission assembly, and the inkjet head forms the inkjet end of the inkjet assembly.

[0010] In the above-mentioned speckle generation device, optionally, the inkjet assembly also includes an ink reservoir, an ink supply tube, and an ink valve. The ink inlet end of the inkjet tube is connected to the ink outlet end of the ink reservoir through the ink supply tube, and the ink valve is disposed on the ink supply tube.

[0011] In the above-mentioned speckle fabrication apparatus, optionally, a moving component is disposed on top of the transmission component. The moving component includes a moving frame, a gear and a rack. The driving end of the driving component is connected to the gear, the gear and the rack mesh with each other, the rack is connected to the moving frame, and the moving frame is connected to the inkjet tube.

[0012] When the drive unit drives the gear to rotate in the first direction, the rack moves downward. The rack drives the inkjet tube to descend downward through the moving frame, and then the inkjet head descends downward.

[0013] When the drive unit drives the gear to rotate in the second direction, the rack moves upward, and the rack drives the inkjet tube to rise upward through the moving frame, which in turn raises the inkjet head.

[0014] The first direction is opposite to the second direction.

[0015] In the above-mentioned speckle production device, optionally, the movable frame includes a vertical frame and a horizontal frame, with at least one vertical frame, at least one vertical frame is disposed on one side of the transmission component, and the bottom of the vertical frame is connected to the support base.

[0016] The first end of the horizontal frame is slidably connected to the vertical frame; the second end of the horizontal frame is connected to the rack; and an inkjet tube is installed in the middle section of the horizontal frame.

[0017] Optionally, the above-mentioned speckle pattern making device may also include a torque sensor and a controller, and the driving component includes a drive motor, with the first end of the torque sensor connected to the drive motor and the second end of the torque sensor connected to a gear.

[0018] Both the torque sensor and the drive motor are electrically connected to the controller.

[0019] In the above-mentioned speckle production device, optionally, the transmission component includes a belt, rollers and a transmission motor, the belt surrounds the opposite sides of the support surface of the support base; there are two rollers, which are arranged at opposite ends of the support base along a third direction, and the transmission motor is configured to drive the rollers to rotate, thereby driving the belt to rotate.

[0020] The third direction is parallel to the extension direction of the preset transmission path.

[0021] In the above-mentioned speckle fabrication device, optionally, the inkjet head has an inkjet cavity that is connected to the inkjet tube, and the outer peripheral wall of the inkjet head is provided with a protrusion and a hole that is connected to the inkjet cavity.

[0022] And / or, the cross-section of the inkjet head along the direction perpendicular to the preset transmission path is circular; along the direction closer to the support surface, the area of ​​the cross-section of the inkjet head gradually decreases.

[0023] In the above-mentioned speckle-forming device, optionally, the crossbeam includes a first crossbeam section and a second crossbeam section, the first crossbeam section and the second crossbeam section are arranged opposite to each other along a third direction and surround each other to form a transverse connecting area.

[0024] The middle section of the inkjet tube has a groove that engages with the transverse connecting area.

[0025] Optionally, the above-mentioned speckle pattern making device may also include a support horizontal plate, a support vertical plate, and a support block, all of which are mounted on a support base. There are two support vertical plates, which are arranged opposite each other along a third direction. The two ends of the support horizontal plate are respectively connected to the two support vertical plates. The drive motor and the support block are sequentially mounted on the horizontal plate support surface of the support horizontal plate, and the torque sensor is mounted on the support block.

[0026] This application provides a speckle pattern making apparatus, which includes a support base, a transmission component, a drive component, a moving component, and an inkjet component. The transmission component, drive component, and moving component are all mounted on the support base. The support base provides a support platform for the speckle pattern making apparatus, improving the stability of each part of the apparatus. The transmission component moves the workpiece along a preset transmission path, improving the automation level of the speckle pattern making apparatus. The moving component, drive component, and inkjet component are connected, and the drive component drives the inkjet component to move towards or away from the transmission component, thereby creating speckles on the workpiece surface. The drive component, by moving the inkjet component towards or away from the transmission component, controls the movement path of the inkjet component, improving the accuracy and quality of the speckle pattern making process. By setting the inkjet end of the inkjet component as a flexible element, the inkjet component can be adapted to workpieces with curved surfaces, improving the versatility of the speckle pattern making apparatus. Attached Figure Description

[0027] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0028] Figure 1 This is a schematic diagram of the speckle-forming apparatus provided in the embodiments of this application;

[0029] Figure 2 A schematic diagram of the support base, transmission component, and moving component of the speckle generation apparatus provided in the embodiments of this application;

[0030] Figure 3 A schematic diagram of the drive unit, torque sensor, and moving component of the speckle fabrication apparatus provided in the embodiments of this application;

[0031] Figure 4 A schematic diagram of the supporting horizontal plate, supporting vertical plate, and supporting block of the speckle generation device provided in the embodiments of this application;

[0032] Figure 5 A first-view structural schematic diagram of the inkjet assembly of the speckle fabrication apparatus provided in an embodiment of this application;

[0033] Figure 6 A second-view structural schematic diagram of the inkjet assembly of the speckle fabrication apparatus provided in an embodiment of this application;

[0034] Figure 7 Structural diagram of an alternative structure for the speckle generation apparatus provided in the embodiments of this application. Figure 1 ;

[0035] Figure 8 Structural diagram of an alternative structure for the speckle generation apparatus provided in the embodiments of this application. Figure 2 ;

[0036] Figure 9 This is a schematic diagram of the electrical connections of the speckle-making apparatus provided in an embodiment of this application.

[0037] Explanation of reference numerals in the attached figures:

[0038] 100: Support base;

[0039] 200: Conveyor assembly; 210: Belt; 220: Roller;

[0040] 300: Drive components;

[0041] 400: Moving component; 410: Moving frame; 411: Horizontal frame; 411a: Lateral connection area; 411b: Fastening hole; 412: Vertical frame; 412a: Slide groove; 412b: Roller; 420: Gear; 430: Rack;

[0042] 500: Inkjet assembly; 510: Inkjet tube; 520: Inkjet head; 521: Protrusion; 522: Hole; 530: Ink reservoir; 540: Ink supply tube; 550: Ink valve;

[0043] 600: Torque sensor; 700: Controller;

[0044] 800: Supporting horizontal plate; 810: Supporting vertical plate; 820: Supporting block;

[0045] 900: pressure head; 1000: flat key.

[0046] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0047] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0048] The inventors of this application discovered during their research that Digital Image Correlation (DIC), also known as Digital Speckle Correlation, is a method that applies a random pattern called a speckle pattern to the surface of a sample through coating or other methods. It measures strain / displacement by analyzing and calculating the pattern of the sample before and after deformation, and then visualizes the result. Unlike traditional strain gauge measurements, deformation and displacement in DIC are derived through image analysis, allowing for non-contact observation of sample deformation. DIC is a three-dimensional, non-contact optical measurement method for measuring the contour, displacement, vibration, and strain of any material object. This method can be used for various tests, including static and dynamic applications involving tension, torsion, bending, and combined loading.

[0049] In existing technologies, digital image correlation (DIC) calculations are based on the displacement of speckle patterns on the sample surface. Therefore, the speckle quality on the tested sample surface directly affects the accuracy of measurement and analysis. High-quality speckle fabrication requires high contrast, randomness, anisotropy, and stability. Currently, commonly used speckle fabrication methods include spraying, stencil coating, roller brushing, and applying transfer stickers to the sample surface.

[0050] However, while spray painting is quick and convenient, it is only suitable for small-sized samples, and the speckle pattern produced by spray painting is of poor quality. Roller brushes and stencils can be used for samples of different sizes, but the speckle patterns produced by roller brushes and stencils are repetitive. Transfer printing uses a speckle generation tool provided by a software system; by inputting the sample size and camera parameters, the system automatically generates a standard speckle pattern. This method produces ideal speckle quality, but it is not suitable for high-temperature applications and requires high precision in the transfer technology. Furthermore, the above speckle generation methods are only applicable to flat sample surfaces. Therefore, existing speckle generation devices suffer from poor speckle generation results and cannot generate speckles on curved sample surfaces.

[0051] In view of this, this application provides a speckle-making device, which includes a support base, a transmission component, a drive component, a moving component, and an inkjet component. The transmission component, drive component, and moving component are all mounted on the support base. The support base provides a support platform for the speckle-making device, improving the stability of each part of the device. The transmission component moves the workpiece along a preset transmission path, improving the automation level of the speckle-making device. The moving component, drive component, and inkjet component are connected, and the drive component drives the inkjet component to move towards or away from the transmission component, thereby creating speckles on the workpiece surface. The drive component, by moving the inkjet component towards or away from the transmission component, controls the movement path of the inkjet component, improving the accuracy and quality of the speckle-making process. By setting the inkjet end of the inkjet component as a flexible element, the inkjet component can be adapted to workpieces with curved surfaces, improving the versatility of the speckle-making device.

[0052] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0053] Reference Figure 1 As shown, this application provides a speckle-making apparatus for creating speckles on the surface of a workpiece. The speckle-making apparatus includes a support base 100, a transmission component 200, a driving component 300, a moving component 400, and an inkjet component 500.

[0054] The transmission component 200, the driving component 300, and the moving component 400 are all mounted on the support base 100. The transmission component 200 is used to place the workpiece and drive the workpiece to move along a preset transmission path. The inkjet component 500 is connected to the moving component 400, and the inkjet end of the inkjet component 500 faces the transmission component 200. The inkjet end of the inkjet component 500 is a flexible spring.

[0055] The drive unit 300 is connected to the moving component 400 and is used to drive the inkjet component 500 to move toward or away from the transmission component 200 via the moving component 400.

[0056] For example, refer to Figure 1 As shown, in the process of creating speckle patterns on the workpiece surface, the workpiece is first placed on the transfer component 200. Then, the transfer component 200 moves the workpiece along a preset transfer path until the workpiece is at a preset position. At this point, the transfer component 200 is turned off. The preset transfer path is referenced... Figure 1 In the direction indicated by x. The driving component 300 drives the inkjet assembly 500 to move closer to the transmission assembly 200 via the moving component 400. When the inkjet tip of the inkjet assembly 500 contacts the surface of the workpiece, the inkjet assembly 500 contacts the workpiece surface and sprays ink to create speckle patterns on the workpiece surface. After the inkjet assembly 500 completes the creation of speckle patterns on the workpiece surface, the driving component 300 drives the inkjet assembly 500 to move away from the transmission assembly 200 via the moving component 400, and the inkjet assembly 500 leaves the workpiece surface. At this time, the transmission assembly 200 is activated, and the transmission assembly 200 continues to move the workpiece along a preset transmission path.

[0057] The preset position is the location for creating speckle patterns on the workpiece.

[0058] By setting up the transmission component 200, during the process of creating speckle patterns on the workpiece surface, the workpiece only needs to be placed on the transmission component 200, avoiding the time-consuming and laborious problem of manually moving the workpiece, improving the automation level of the speckle creation device, increasing work efficiency, and preventing damage to the workpiece surface during manual workpiece movement. By setting up the driving component 300 and the moving component 400, the driving component 300 drives the inkjet component 500 to move away from or towards the transmission component 200 through the moving component 400, controlling the movement path of the inkjet component 500, avoiding excessive or insufficient contact between the inkjet component 500 and the workpiece surface, improving the accuracy of the speckle creation device, and thus improving the quality of the speckle pattern on the workpiece surface. By setting the inkjet end of the inkjet component 500 as a flexible element, the inkjet component 500 can be adapted to workpieces with different surface shapes. The inkjet component 500 can be used to create speckle patterns on workpieces with flat surfaces, and it can also be used to create speckle patterns on workpieces with curved surfaces, improving the versatility of the speckle creation device and improving the speckle creation quality of workpieces with curved surfaces.

[0059] As one possible implementation, the transmission assembly 200 includes a belt 210, rollers 220 and a transmission motor. The belt 210 is disposed on opposite sides of the support surface of the support base 100. There are two rollers 220, which are disposed at opposite ends of the support base 100 along a third direction. The transmission motor is configured to drive the rollers 220 to rotate, thereby driving the belt 210 to rotate.

[0060] The third direction is parallel to the extension direction of the preset transmission path.

[0061] For example, refer to Figure 2 As shown, the support base 100 can be a table, and two rollers 220 are arranged at opposite ends of the table along a third direction, wherein the third direction is parallel to the extension direction of the preset transmission path, and the third direction is referenced. Figure 2 The direction is shown in the middle x. There are two rollers 220, one is a drive roller and the other is a driven roller. The drive roller is connected to the transmission motor. The belt 210 is sleeved on the support surface of the rollers 220 and the table.

[0062] During the operation of the transmission component 200, the transmission motor rotates, which drives the drive roller to rotate, and the drive roller drives the belt 210 to rotate. Consequently, the workpiece placed above the belt 210 moves along a preset transmission path. By setting up the belt 210 and roller 220, during the process of creating speckle patterns on the workpiece surface, the workpiece only needs to be placed on the belt 210, avoiding the time-consuming and laborious problem of manually moving the workpiece. This improves the automation level of the speckle pattern making device, increases work efficiency, and avoids damage to the workpiece surface during manual workpiece movement.

[0063] In some embodiments, the transmission component 200 may also be a belt conveyor, wherein the plane on which the belt 210 of the belt conveyor is located and the plane on which the support surface of the support base 100 is located are on the same horizontal plane.

[0064] As one feasible implementation method, refer to Figure 1 , Figure 5 and Figure 6 As shown, the inkjet assembly 500 includes an inkjet tube 510 and an inkjet head 520, which are connected to each other. The inkjet tube 510 is connected to the moving assembly 400, and the inkjet head 520 faces the transmission assembly 200, forming the inkjet end of the inkjet assembly 500.

[0065] For example, during the process of creating speckle patterns on a workpiece surface, when the drive component 300 moves the inkjet tube 510 towards the belt 210 via the moving component 400, the inkjet head 520 connected to the inkjet tube 510 also moves towards the belt 210, that is, the inkjet head 520 approaches the surface of the workpiece. When the inkjet head 520 contacts the workpiece surface, it sprays ink onto the workpiece surface to create speckle patterns.

[0066] As one feasible implementation method, refer to Figures 1 to 3 As shown, the moving component 400 is disposed on top of the transmission component 200. The moving component 400 includes a moving frame 410, a gear 420 and a rack 430. The driving end of the driving member 300 is connected to the gear 420. The gear 420 and the rack 430 mesh with each other. The rack 430 is connected to the moving frame 410. The moving frame 410 is connected to the inkjet tube 510.

[0067] When the drive unit 300 drives the gear 420 to rotate in the first direction, the rack 430 moves downward, and the rack 430 drives the inkjet tube 510 to descend downward through the moving frame 410, thereby causing the inkjet head 520 to descend downward.

[0068] When the drive unit 300 drives the gear 420 to rotate in the second direction, the rack 430 moves upward. The rack 430 drives the inkjet tube 510 to rise upward through the moving frame 410, which in turn causes the inkjet head 520 to rise upward. The first direction and the second direction are opposite.

[0069] For example, refer to Figure 1 and Figure 3 As shown, during the speckle pattern fabrication process in the speckle fabrication device, the transmission component 200 is initially in operation. When the belt 210 transports the workpiece directly below the inkjet head 520, the drive component 300 is activated, and the transmission component 200 is deactivated. The drive component 300 drives the gear 420 to rotate in a first direction, for example, clockwise. This causes the rack 430, which meshes with the gear 420, to move downwards. Consequently, the rack 430 drives the moving frame 410 to move closer to the belt 210, i.e., closer to the workpiece surface. The inkjet head 520 descends and comes into contact with the workpiece surface, thus achieving speckle pattern fabrication on the workpiece surface.

[0070] After the speckle pattern is created on the workpiece surface, the drive unit 300 drives the gear 420 to rotate in the second direction, for example, counterclockwise. This causes the rack 430, which meshes with the gear 420, to move upward. In turn, the rack 430 drives the moving frame 410 to move away from the belt 210, i.e. away from the workpiece surface. The inkjet head 520 rises upward. At this time, the transmission assembly 200 is in working condition, and the workpiece is transmitted to the designated position under the drive of the belt 210.

[0071] In this way, the drive component 300 drives the moving frame 410 to move through the gear 420 and rack 430, so as to control the moving path of the inkjet head 520, accurately control the contact area between the inkjet head 520 and the workpiece surface, and ensure the accuracy and clarity of the speckle.

[0072] As one feasible implementation method, refer to Figure 3 and Figure 9 As shown, the speckle generation device also includes a torque sensor 600 and a controller 700. The drive unit 300 includes a drive motor. The first end of the torque sensor 600 is connected to the drive motor, and the second end of the torque sensor 600 is connected to the gear 420.

[0073] The torque sensor 600 and the drive motor are both electrically connected to the controller 700.

[0074] For example, during the speckle pattern fabrication process on the workpiece surface by the speckle fabrication device, when the belt 210 transports the workpiece to directly below the inkjet head 520, the drive motor starts. At this time, the drive motor is in the first working position. The drive motor drives the torque sensor 600, which in turn drives the gear 420 to rotate clockwise. The rack 430 meshing with the gear 420 moves downward. In this way, the rack 430 drives the moving frame 410 to move closer to the belt 210, that is, closer to the workpiece surface. The inkjet head 520 descends and comes into contact with the workpiece surface to achieve speckle pattern fabrication.

[0075] After the speckle pattern on the workpiece surface is created, the drive motor is in the second working position. The drive motor drives the torque sensor 600, which drives the gear 420 to rotate counterclockwise. The rack 430 meshing with the gear 420 moves upward. In this way, the rack 430 drives the moving frame 410 to move away from the belt 210, that is, away from the workpiece surface. The inkjet head 520 rises, and the workpiece continues to move along the preset transmission path under the drive of the transmission component 200.

[0076] For example, refer to Figure 3 As shown, the speckle pattern making apparatus also includes at least two flat keys 1000. The flat key 1000 is a key that transmits torque by pressing against the sides of the keyway using its two sides as working surfaces. The position of the flat key 1000 is shown in the reference diagram. Figure 3Enlarged view of area c. The torque sensor 600 and the drive motor are connected by a key 1000. The drive motor has a drive groove, and the side of the torque sensor 600 connected to the drive motor has a first transmission groove. At least a portion of the key 1000 is located in the drive groove, and at least a portion of the key 1000 is located in the first transmission groove. The torque sensor 600 and the gear 420 are connected by a key 1000. The gear 420 has a gear groove, and the side of the torque sensor 600 connected to the gear 420 has a second transmission groove. At least a portion of the key 1000 is located in the gear groove, and at least a portion of the key 1000 is located in the second transmission groove. The key 1000 connection offers advantages such as easy assembly and disassembly and good centering. By using the key 1000, the installation efficiency of the speckle generation device is improved, as are the transmission efficiency between the drive component 300 and the torque sensor 600, and between the torque sensor 600 and the gear 420.

[0077] As one feasible implementation method, refer to Figure 4 As shown, the speckle generation device also includes a support horizontal plate 800, a support vertical plate 810, and a support block 820. The support horizontal plate 800, the support vertical plate 810, and the support block 820 are all mounted on the support base 100. There are two support vertical plates 810, which are arranged opposite each other along a third direction. The two ends of the support horizontal plate 800 are respectively connected to the two support vertical plates 810. The drive motor and the support block 820 are sequentially mounted on the horizontal plate support surface of the support horizontal plate 800, and the torque sensor 600 is mounted on the support block 820.

[0078] For example, the bottoms of the two vertical support plates 810 are welded to the support base 100, and the two ends of the horizontal support plate 800 are welded to the tops of the two vertical support plates 810 respectively. The drive motor and the support block 820 are sequentially arranged on the horizontal support surface of the horizontal support plate 800, and the torque sensor 600 is arranged above the support block 820. This ensures that the drive motor and the torque sensor 600 are at the same height, which is beneficial for power transmission. At the same time, it can provide a support point for the torque sensor 600 and improve the running stability of the torque sensor 600.

[0079] As one possible implementation, the mobile frame 410 includes a vertical frame 412 and a horizontal frame 411. There is at least one vertical frame 412, which is disposed on one side of the transmission assembly 200, and the bottom of the vertical frame 412 is connected to the support base 100.

[0080] The first end of the horizontal frame 411 is slidably connected to the vertical frame 412; the second end of the horizontal frame 411 is connected to the rack 430; and an inkjet tube 510 is provided in the middle section of the horizontal frame 411.

[0081] In some embodiments, refer to Figure 1As shown, there is one vertical frame 412, which is positioned near the belt 210 to avoid affecting the rotation of the belt 210. The bottom of the vertical frame 412 is connected to the support base 100 to improve the stability of the moving frame 410 when it drives the inkjet tube 510. The vertical frame 412 has a groove 412a, the position of which is referenced... Figure 2 In the enlarged view of region a, the end of the horizontal frame 411 can be connected to the groove 412a of the vertical frame 412 via the roller 412b. As the rack 430 drives the horizontal frame 411 to move up or down, both ends of the horizontal frame 411 slide in the groove 412a of the vertical frame 412, which improves the sliding stability of the horizontal frame 411.

[0082] In other embodiments, there are two uprights 412, along a fourth direction, the fourth direction being referenced. Figure 2 In the direction shown by y, two vertical frames 412 are respectively arranged on opposite sides of the belt 210 to avoid affecting the rotation of the belt 210. The bottoms of the two vertical frames 412 are connected to the support base 100 to improve the stability of the moving frame 410 when it drives the inkjet tube 510. The vertical frame 412 has a sliding groove 412a. The two ends of the horizontal frame 411 can be connected to the sliding groove 412a of the vertical frame 412 through rollers 412b. At least one end of the horizontal frame 411 passes through the sliding groove 412a and is connected to the rack 430. When the rack 430 drives the horizontal frame 411 to move up or down, the two ends of the horizontal frame 411 slide in the sliding groove 412a of the vertical frame 412, which improves the sliding stability of the horizontal frame 411, improves the stability of the movement of the inkjet tube 510, and improves the stability of the speckle production process.

[0083] For example, when there are two vertical supports, the speckle fabrication apparatus also includes an infrared transmitter and an infrared receiver, both of which are electrically connected to the controller 700. The infrared transmitter can be mounted on one vertical support 412, and the infrared receiver can be mounted on the other vertical support 412. When the workpiece moves directly under the inkjet head 520, the infrared transmitter cannot transmit a signal to the infrared receiver due to the obstruction of the workpiece. The infrared receiver transmits this signal to the controller 700, and the controller 700 controls the transmission component 200 to shut down. The workpiece remains directly under the inkjet head 520, waiting to be speckled.

[0084] As one possible implementation, the crossbeam 411 includes a first crossbeam section and a second crossbeam section, which are arranged opposite to each other along a third direction and surround each other to form a transverse connection area 411a.

[0085] The inkjet tube 510 has a groove in the middle section, which engages with the transverse connecting area 411a.

[0086] For example, the speckle-forming device also includes screws, and fastening holes 411b are provided in the middle sections of both the first and second crossbeam sections. The positions of the fastening holes 411b are as follows: Figure 2 The enlarged view of area b shows that after the groove in the middle section of the inkjet tube 510 is engaged with the transverse connecting area 411a, the screw connects the middle section of the inkjet tube 510 and the transverse frame 411 through the fastening hole 411b. By providing a groove in the middle section of the inkjet tube 510 and connecting the transverse frame 411 and the inkjet tube 510 with screws, the connection strength between the inkjet tube 510 and the transverse frame 411 is improved, preventing the inkjet tube 510 from accidentally falling off.

[0087] As one possible implementation, the inkjet assembly 500 also includes an ink reservoir 530, an ink supply tube 540, and an ink valve 550. The ink inlet end of the inkjet tube 510 is connected to the ink outlet end of the ink reservoir 530 through the ink supply tube 540, and the ink valve 550 is disposed on the ink supply tube 540.

[0088] For example, ink reservoir 530 can be an ink tank, and the liquid stored in the ink tank can be ink.

[0089] For example, during the speckle pattern fabrication process on the workpiece surface by the speckle pattern fabrication device, when the belt 210 transports the workpiece directly below the inkjet head 520, the infrared receiver cannot receive the signal from the infrared transmitter. The infrared receiver transmits the signal loss information to the controller 700, and the controller 700 controls the drive motor to enter the first working mode. At this time, the drive motor is in the first working position, and the drive motor drives the torque sensor 600. In turn, the torque sensor 600 drives the gear 420 to rotate clockwise, and the rack 430 meshing with the gear 420 moves downward. In this way, the rack 430 drives the horizontal frame 411 to slide in the slide groove 412a of the vertical frame 412. The inkjet tube 510 connected to the horizontal frame 411 moves closer to the belt 210, that is, closer to the workpiece surface, and the inkjet head 520 moves towards the workpiece surface.

[0090] When the inkjet head 520 comes into contact with the surface of the workpiece, the torque sensor 600 reaches the preset value. The torque sensor 600 transmits the torque signal to the controller 700, which controls the speed of the drive motor. At the same time, the controller 700 controls the ink valve 550 to open, so that ink enters the ink inlet end of the inkjet tube 510 from the ink storage unit 530 through the ink supply tube 540. Then, the ink overflows from the inkjet head 520, forming a speckled pattern on the surface of the workpiece.

[0091] To prevent ink from staining the workpiece surface, the controller 700 controls the opening time of the ink valve 550, which can be controlled between 3s and 8s, for example, 5s. After the ink valve 550 has been open for 5s, the speckle pattern on the workpiece surface is completed, and the controller 700 controls the ink valve 550 to close. At this time, the controller 700 drives the motor to enter the second working mode. In this mode, the drive motor is in the second working position, and the drive motor drives the torque sensor 600. The torque sensor 600 then drives the gear 420 to rotate counterclockwise. The rack 430, which meshes with the gear 420, moves upward. In this way, the rack 430 drives the horizontal frame 411 to slide upward in the groove 412a of the vertical frame 412. The inkjet tube 510 connected to the horizontal frame 411 moves away from the belt 210, that is, away from the workpiece surface, so that the inkjet head 520 no longer comes into contact with the workpiece surface. At this time, the workpiece continues to move along the preset transmission path under the drive of the belt 210, and the next workpiece is transmitted to the area directly below the inkjet head 520. This cycle is repeated to achieve the mass production of speckles on the workpiece surface.

[0092] For example, ink valve 550 can be a solenoid valve.

[0093] For example, when the speckle-making device is making speckles on the surface of the workpiece, the drive motor is first in the first working position. The drive motor drives the torque sensor 600, and then the torque sensor 600 drives the gear 420 to rotate in the clockwise direction. The rack 430 meshing with the gear 420 moves downward. In this way, the rack 430 drives the horizontal frame 411 to slide in the slide groove 412a of the vertical frame 412. The inkjet tube 510 connected to the horizontal frame 411 moves closer to the belt 210, that is, closer to the workpiece surface. The inkjet head 520 moves towards the workpiece surface. When the inkjet head 520 contacts the surface of the workpiece, the drive motor continues to drive the torque sensor 600. The torque sensor 600 drives the gear 420 to rotate clockwise, and the rack 430, which meshes with the gear 420, moves downward. The rack 430 then drives the crossbeam 411 to continue moving downward. In other words, under the action of the drive motor, the torque sensor 600, the gear 420, and the rack 430, the crossbeam 411 can provide downward pressure to the inkjet head 520, so that the inkjet head 520 can adapt to curved surface samples of a certain size range under pressure. The pressure is calculated using the following formula:

[0094]

[0095] Where F represents pressure, P refers to the torque value output by torque sensor 600, and r is the radius of gear 420.

[0096] As one feasible implementation, the inkjet head 520 has an inkjet cavity that is connected to the inkjet tube 510. The outer peripheral wall of the inkjet head 520 is provided with a protrusion 521 and a hole 522 that is connected to the inkjet cavity.

[0097] In some embodiments, the cross-section of the inkjet head 520 along the direction perpendicular to the preset transmission path is circular; the area of ​​the cross-section of the inkjet head 520 gradually decreases along the direction close to the support surface.

[0098] For example, the inkjet tube 510 can be a colloid tube with a colloid tube flow channel inside; the inkjet head 520 can be a curved colloid head with an inkjet cavity, wherein the colloid tube flow channel and the inkjet cavity are connected, and the hole 522 on the surface of the curved colloid head is connected to the inkjet cavity. In this way, when ink enters the colloid tube flow channel, the ink flows from the colloid tube flow channel to the inkjet cavity, and then the ink is ejected from the hole 522.

[0099] By setting the inkjet head 520 as a curved colloid, the curved colloid acts on the workpiece with a curved surface under the pressure transmitted from the drive motor to the crossbeam 411 via the torque sensor 600, gear 420, and rack 430, thus creating speckle patterns on the surface of the workpiece and improving the versatility of the speckle creation device. The curved colloid can be pad printing silicone, which possesses a certain degree of hardness and flexibility, can adapt to curved surfaces within a certain range, and has the advantages of durability and clear printed patterns, thereby improving the quality of speckle patterns produced by the speckle creation device.

[0100] For example, by setting the cross-section of the inkjet head 520 along the direction perpendicular to the preset transmission path to be circular, and setting the area of ​​the cross-section of the inkjet head 520 to gradually decrease along the direction close to the support surface, the contact area between the inkjet head 520 and the surface of the curved workpiece can be increased, thereby improving the speckle effect on the workpiece surface.

[0101] In some embodiments, refer to Figure 7 and Figure 8 As shown, the speckle pattern making device can be configured as a simple handheld version to adapt to speckle pattern making on curved workpiece surfaces within a certain size range, improving the convenience of the speckle pattern making device. The simple handheld speckle pattern making device includes an inkjet head 520, an inkjet tube 510, and a pressure head 900. The inkjet tube 510 has an inkjet channel, and the pressure head is located in the inkjet channel. The inkjet head 520 has the same structure as the inkjet head 520 mentioned in the above embodiment, so it will not be described again here. During the operation of the simple handheld speckle pattern making device, ink fills the inkjet channel. When the inkjet head 520 contacts the workpiece surface, the pressure head is manually pressed, and the ink flows from the inkjet channel to the inkjet cavity of the inkjet head 520, and then flows from the hole 522 to the workpiece surface to achieve speckle pattern making.

[0102] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.

[0103] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A speckle making device, characterized by, The speckle-making device is used to create speckle patterns on the surface of a workpiece. The speckle-making device includes a support base, a transmission component, a drive component, a moving component, and an inkjet component. The transmission component, the driving component, and the moving component are all mounted on the support base. The transmission component is used to place the workpiece and drive the workpiece to move along a preset transmission path. The inkjet component is connected to the moving component, and the inkjet end of the inkjet component faces the transmission component. The inkjet end of the inkjet component is a flexible spring. The driving component is connected to the moving component and is used to drive the inkjet component to move toward or away from the transmission component via the moving component. The inkjet assembly includes an inkjet tube and an inkjet head, the inkjet tube and the inkjet head are connected to each other, the inkjet tube is connected to the moving component, the inkjet head faces the transmission component, and the inkjet head forms the inkjet end of the inkjet assembly. It also includes a torque sensor and a controller, the drive unit includes a drive motor, a first end of the torque sensor is connected to the drive motor, and a second end of the torque sensor is connected to the moving component; Both the torque sensor and the drive motor are electrically connected to the controller. The inkjet assembly also includes an ink reservoir, an ink supply tube, and an ink valve. The ink inlet end of the inkjet tube is connected to the ink outlet end of the ink reservoir, and the ink valve is disposed on the ink supply tube. The controller is configured to open the ink valve when the torque detected by the torque sensor reaches a preset value, and to close the ink valve after the speckle pattern on the workpiece surface is created.

2. The speckle making device according to claim 1, characterized in that The ink inlet end of the inkjet tube is connected to the ink outlet end of the ink supply tube and the ink storage unit.

3. The speckle making device according to claim 1, wherein The moving component is disposed on top of the transmission component. The moving component includes a moving frame, a gear and a rack. The driving end of the driving member is connected to the gear. The gear and the rack mesh with each other. The rack is connected to the moving frame. The moving frame is connected to the inkjet tube. When the driving component drives the gear to rotate in the first direction, the rack moves downward, and the rack drives the inkjet tube to descend downward through the moving frame, thereby causing the inkjet head to descend downward. When the driving component drives the gear to rotate in the second direction, the rack moves upward, and the rack drives the inkjet tube to rise upward through the moving frame, thereby raising the inkjet head upward. The first direction and the second direction are opposite.

4. The speckle making device according to claim 3, wherein The mobile frame includes a vertical frame and a horizontal frame, with at least one vertical frame, at least one of which is disposed on one side of the transmission assembly, and the bottom of the vertical frame is connected to the support base; The first end of the horizontal frame is slidably connected to the vertical frame; the second end of the horizontal frame is connected to the rack; and the inkjet tube is provided in the middle section of the horizontal frame.

5. The speckle making device according to claim 4, wherein The second end of the torque sensor is connected to the gear.

6. The speckle making device according to claim 5, wherein The transmission assembly includes a belt, rollers, and a transmission motor. The belt surrounds opposite sides of the support surface of the support base. There are two rollers, which are arranged at opposite ends of the support base along a third direction. The transmission motor is configured to drive the rollers to rotate, thereby driving the belt to rotate. The direction of the third direction is parallel to the extension direction of the preset transmission path.

7. The speckle making device according to claim 6, wherein The inkjet head has an inkjet cavity, which is connected to the inkjet tube. A protrusion is provided on the outer peripheral wall of the inkjet head, and a hole is provided on the protrusion, which is connected to the inkjet cavity. And / or, the cross-section of the inkjet head along the direction perpendicular to the preset transmission path is circular; the area of ​​the cross-section of the inkjet head gradually decreases along the direction close to the support surface.

8. The speckle making device according to claim 6, wherein The crossbeam includes a first crossbeam section and a second crossbeam section, the first crossbeam section and the second crossbeam section are arranged opposite to each other along the third direction and surround each other to form a transverse connection area; The inkjet tube has a groove in the middle section, and the groove engages with the transverse connecting area.

9. The speckle making device according to claim 6, wherein It also includes a support horizontal plate, a support vertical plate, and a support block, all of which are mounted on the support base. There are two support vertical plates, which are arranged opposite each other along the third direction. The two ends of the support horizontal plate are respectively connected to the two support vertical plates. The drive motor and the support block are sequentially mounted on the horizontal plate support surface of the support horizontal plate, and the torque sensor is mounted on the support block.

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