Speckle manufacturing device for multi-size DICs
Through the speckle production device for multi-size DIC, the displacement of the convex rod and the convex tube is adjusted by rotating the adjustment screw, which solves the problem that the size of the speckle is difficult to control, and achieves high-quality production of the speckle.
Patent Information
- Application Number
- CN202422284703.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-19
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-09-19
AI Technical Summary
It is difficult to produce scattered spots of different sizes in the prior art, spraying methods and speckle stickers are difficult to meet the needs of use in different scenarios, and the quality of speckle is difficult to ensure uniformity and uniformity.
A multi-size DIC speckle production device is designed. By rotating and adjusting the short screw and long screw, the side plates are driven to move on the inner wall of the fixed disk, the displacement of the convex rod, the convex tube and the convex ring is adjusted, forming speckles of different diameters, and the surface is coated with black or white matte paint.
The production of speckle of different field sizes is realized, which simplifies operation, improves the reliability of speckle quality, and avoids uncontrollability caused by manual spraying.
Smart Images
Figure CN223122184U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of DIC non-contact strain field measurement, and particularly relates to a speckle making device for multi-size DIC. Background Technique
[0002] Digital image correlation method (DIC), also known as digital speckle correlation method, is to obtain the deformation information of the region of interest through correlation calculation of two digital images before and after the deformation of the test piece. Its basic principle is to divide the grid of the region of interest in the pre-deformation image, and regard each sub-region as a rigid motion. Then, for each sub-region, through a certain search method, the correlation calculation is carried out according to the pre-defined correlation function, and the region with the maximum cross-correlation coefficient with this sub-region is found in the post-deformation image, that is, the position of this sub-region after deformation, and then the displacement of this sub-region is obtained. By calculating all sub-regions, the deformation information of the whole field can be obtained.
[0003] Since this method has extremely loose requirements for the experimental environment, and has the advantages of full-field measurement, strong anti-interference ability, high measurement accuracy, etc. In practical engineering applications, the size and quality of the speckles on the surface of the test specimen will directly affect the relevant experimental results. Common painting methods and the way of purchasing speckle stickers in advance often cannot meet the usage requirements in different scenarios, and the workload is large. At the same time, the quality of the speckles obtained by painting is difficult to ensure unity and uniformity. In addition, the size of the speckles is not easy to control, which brings inconvenience to the use when dealing with fields of different sizes. Content of the Utility Model
[0004] Aiming at the deficiencies of the existing technology, the utility model provides a speckle making device for multi-size DIC, and the specific technical solutions are as follows:
[0005] The utility model provides a speckle making device for multi-size DIC, which includes a fixed plate with a lidless cuboid box-shaped structure. The bottom surface of the fixed plate is symmetrically provided with mounting holes along its longitudinal axis; a first side plate and a second side plate are slidably sleeved in the fixed plate from the inside out in sequence; through hole one and screw hole one which are axially opposite to one of the mounting holes are horizontally spaced on the first side plate; screw hole two which is axially opposite to through hole one is provided on the second side plate;
[0006] A short screw rod and a long screw rod are respectively inserted through the two mounting holes; the non-threaded section of the short screw rod is rotatably connected to the corresponding mounting hole, and its threaded section is in driving screw connection with the first screw hole; a plurality of convex rods arranged disorderly are vertically and fixedly connected to the outer vertical surface of the first side plate, and the plurality of convex rods are respectively inserted through the second through holes formed in the second side plate with a clearance; the non-threaded section of the long screw rod is rotatably connected to the corresponding mounting hole, its threaded section passes through the first through hole with a clearance, and is in driving screw connection with the second screw hole; a plurality of convex tubes respectively sleeved on the outer parts of the corresponding convex rods with a clearance are vertically and fixedly connected to the outer vertical surface of the second side plate;
[0007] A speckle printing panel is detachably sealed and fitted at the open end of the fixed disk, and a plurality of third through holes respectively inserted through the corresponding convex tubes with a clearance are formed in the speckle printing panel, and a convex ring with the same inner diameter as its outer port is axially fixedly connected to the outer port of the third through hole.
[0008] As a preferred technical solution of the present utility model, a positioning ring with a conical barrel shape is axially screwed at the inner port of the mounting hole, and annular grooves are circumferentially formed on the non-threaded sections of both the long screw rod and the short screw rod, and the annular grooves are rotatably sleeved on the ports of the corresponding positioning rings facing the first side plate.
[0009] As a preferred technical solution of the present utility model, adjusting knobs are axially fixedly connected to the ends of the non-threaded sections of both the long screw rod and the short screw rod extending out of the fixed disk.
[0010] As a preferred technical solution of the present utility model, the long screw rod and the short screw rod have the same shape but different sizes; the long screw rod includes a lower rod body provided with a threaded section, a limiting rod is axially fixedly connected to the top end of the lower rod body, an upper rod body is axially sleeved and fitted on the limiting rod, and the upper rod body has the same outer diameter as the lower rod body, and the annular groove is formed between the two; the adjusting knob is axially fixedly connected to the top end of the upper rod body, and the adjusting knob is a hollow cylindrical structure, and a fastening bolt for axially screwing with the limiting rod is arranged inside it.
[0011] As a preferred technical solution of the present utility model, the thicknesses of both the first side plate and the second side plate are 1 cm, and the distance between the two is 2 cm.
[0012] As a preferred technical solution of the present utility model, the diameter of the convex rod is 2 mm and the length is 7 cm; the diameter of the convex tube is 3 mm and the length is 4 cm; the diameter of the convex ring is 4 mm and the length is 0.5 cm.
[0013] As a preferred technical solution of the present utility model, the thickness of the speckle printing panel is 1 cm.
[0014] As a preferred technical solution of the present utility model, the materials of the convex rod, the convex tube, the convex ring and the speckle printing panel are all polymethyl methacrylate.
[0015] As a preferred technical solution of the present utility model, the materials of the fixed disk, the first side plate, the second side plate and the positioning ring are all carbon steel; the materials of the short screw and the long screw are both stainless steel.
[0016] The beneficial effects of the present utility model are as follows:
[0017] The present utility model can produce speckles with different diameters, so as to meet the needs of different field of view sizes; the concentrically arranged convex rods, convex tubes and convex rings form multi-level concentric circular convex points, and the densely and disorderly arranged multiple concentric circular convex points form a speckle size adjuster. In this way, according to the size of the shooting field of view, by rotating and adjusting the short screw to drive the first side plate to reciprocate on the inner wall of the fixed disk, and by rotating and adjusting the long screw to drive the second side plate to reciprocate on the inner wall of the fixed disk, the displacement of the convex rod and the convex tube protruding from the convex ring can be adjusted, so as to obtain convex points with different diameters, and a black or white matte paint for speckle printing is applied to the surface of the convex points with this diameter. In this way, the demand for different sizes of speckles in different fields of view can be met. The production of speckles is convenient, fast, simple and easy to use, and the quality of the produced speckles is reliable, avoiding the uncontrollability of the speckle quality caused by manual spraying. Description of the Drawings
[0018] Figure 1 Shows the exploded structural schematic diagram (one) of the present utility model;
[0019] Figure 2 Shows the exploded structural schematic diagram (two) of the present utility model;
[0020] Figure 3 Shows the exploded structural schematic diagram (three) of the present utility model;
[0021] Figure 4 Shows the exploded structural schematic diagram (four) of the present utility model;
[0022] Figure 5 Shows the structural schematic diagram of the second side plate in the present utility model;
[0023] Figure 6 Shows the assembled structural schematic diagram of the present utility model;
[0024] Figure 7 Shows the structural schematic diagram of the long screw in the present utility model;
[0025] Figure 8 Shows the exploded structural schematic diagram of the long screw in the present utility model.
[0026] As shown in the figure: 1. Fixed disk; 11. Mounting hole; 2. First side plate; 21. Convex rod; 22. First through hole; 23. First screw hole; 3. Second side plate; 31. Convex tube; 32. Second through hole; 33. Second screw hole; 4. Short screw; 5. Long screw; 51. Lower rod body; 511. Limit rod; 52. Upper rod body; 521. Fastening bolt; 6. Speckle printing panel; 61. Convex ring; 62. Third through hole; 7. Positioning ring; 8. Ring groove; 9. Adjusting knob. Specific embodiments
[0027] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below in conjunction with embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.
[0028] Embodiment 1
[0029] To solve the technical problems in the background art, a speckle making device for multi-size DIC is given as follows:
[0030] Combined with Figures 1 to 6 As shown, a speckle making device for multi-size DIC includes a fixed disk 1 with a lidless cuboid box-like structure. Mounting holes 11 are symmetrically opened on the bottom surface of the fixed disk 1 along its longitudinal axis. Inside the fixed disk 1, a first side plate 2 and a second side plate 3 are slidably sleeved in sequence from the inside out. Through holes 22 and screw holes 23 that are axially opposite to one of the mounting holes 11 are horizontally spaced on the first side plate 2. A second screw hole 33 axially opposite to the through hole 22 is opened on the second side plate 3.
[0031] A short screw 4 and a long screw 5 are respectively inserted through the two mounting holes 11. The non-threaded section of the short screw 4 is rotatably connected to the corresponding mounting hole 11, and its threaded section is threadedly connected to the screw hole 23 in a driving manner. A plurality of convex rods 21 arranged disorderly are vertically fixed on the outer vertical surface of the first side plate 2, and the plurality of convex rods 21 are respectively inserted through the through holes 32 on the second side plate 3 with a clearance. The non-threaded section of the long screw 5 is rotatably connected to the corresponding mounting hole 11, and its threaded section passes through the through hole 22 with a clearance and is threadedly connected to the screw hole 33 in a driving manner. A plurality of convex tubes 31 respectively sleeved on the outside of the corresponding convex rods 21 with a clearance are vertically fixed on the outer vertical surface of the second side plate 3.
[0032] A speckle printing panel 6 is detachably sealed and fitted at the open end of the fixed disk 1, and a plurality of through holes 62 respectively inserted through the corresponding convex tubes 31 with a clearance are opened on the speckle printing panel 6. A convex ring 61 with the same inner diameter as the through hole 62 is axially fixed at the outer port of the through hole 62.
[0033] By adopting the above technical solution, the speckle making device can produce speckles with different diameters, thus meeting the requirements of different field of view sizes; the concentrically arranged convex rods 21, convex tubes 31 and convex rings 61 form multi-level concentric circular convex points, and the densely and disorderly arranged multiple concentric circular convex points form a speckle size adjuster. In this way, according to the size of the shooting field of view, by rotating and adjusting the short screw rod 4, the first side plate 2 can be driven to reciprocate on the inner wall of the fixed disk 1, and by rotating and adjusting the long screw rod 5, the second side plate 3 can be driven to reciprocate on the inner wall of the fixed disk 1, so as to adjust the displacement of the convex rod 21 and the convex tube 31 protruding from the convex ring 61, and then obtain convex points with different diameters, and apply black or white matte paint for speckle printing on the surface of the convex points with such diameters. In this way, it can meet the requirements of different field of views for different sizes of speckles. The production of speckles is convenient, fast, simple and easy to use, and the quality of the produced speckles is reliable, avoiding the uncontrollability of the speckle quality caused by manual spraying.
[0034] Among them, DIC, also known as digital speckle correlation method, needs to track and calculate the random texture on the surface of the specimen. Therefore, the surface of the specimen must have enough random texture; this random texture is what we often call speckle, and the disorder of the speckle is mainly for the algorithm to identify, track and calculate the image sub-regions; therefore, the speckle size adjuster composed of densely and disorderly arranged multiple concentric circular convex points can make the printed speckle have disorder.
[0035] Preferably, the thicknesses of the first side plate 2 and the second side plate 3 are both 1 cm, and the distance between them is 2 cm; the diameter of the convex rod 21 is 2 mm and the length is 7 cm; the diameter of the convex tube 31 is 3 mm and the length is 4 cm; the diameter of the convex ring 61 is 4 mm and the length is 0.5 cm; the thickness of the speckle printing panel 6 is 1 cm.
[0036] By adopting the above technical solution, the thicknesses of the first side plate 2 and the second side plate 3 are both 1 cm. Such a thickness design not only ensures the strength of the side plates, but also avoids increasing the weight and complexity of the device due to excessive thickness; at the same time, the distance between them is 2 cm, which provides enough adjustment space for the convex rod 21 and the convex tube 31, and also ensures the stability of the device during the adjustment process.
[0037] The diameter of the convex rod 21 is 2 mm and the length is 7 cm. Such a design enables the convex rod 21 to smoothly pass through the through hole 32 on the second side plate 3. By rotating the short screw rod 4 and the long screw rod 5, the relative positions of the first side plate 2 and the second side plate 3 can be accurately adjusted, and then the displacement of the convex rod 21 and the convex tube 31 protruding from the convex ring 61 can be controlled, realizing the precise adjustment of the speckle size.
[0038] The diameter of the convex tube 31 is 3 mm. Such a design enables the convex tube 31 to be sleeved outside the convex rod 21 with a gap, ensuring the stability of the convex rod 21 during the adjustment process. At the same time, the diameter of the convex ring 61 is 4 mm and the length is 0.5 cm. Its design is used to ensure the stability of the convex tube 31 during the adjustment process. The thickness of the speckle printing panel 6 is 1 cm, which not only ensures its stiffness, but also its detachable design facilitates replacement and cleaning.
[0039] Preferably, the materials of the convex rod 21, convex tube 31, convex ring 61 and speckle printing panel 6 are all polymethyl methacrylate. The materials of the fixed disk 1, the first side plate 2, the second side plate 3 and the positioning ring 7 are all carbon steel; the materials of the short screw 4 and the long screw 5 are all stainless steel.
[0040] By adopting the above technical solutions, the convex rod 21, convex tube 31, convex ring 61 and speckle printing panel 6 are made of polymethyl methacrylate, which not only has a light weight, good hardness, but also has a good transparent effect, facilitating observation during the operation process. The fixed disk 1, the first side plate 2, the second side plate 3 and the positioning ring 7 made of carbon steel can ensure the overall structure of the device is stable, capable of withstanding certain mechanical stresses and external force impacts, and extending the service life of the device. Stainless steel also has excellent strength and durability, which is suitable for the short screw 4 and the long screw 5 that need to be adjusted and used frequently.
[0041] Embodiment 2
[0042] Combined with Figures 1 to 4 and Figure 7 、 Figure 8 As shown, on the basis of the above embodiment, the following content is further given in this embodiment:
[0043] In this embodiment, as Figure 1 、 Figure 3 、 Figure 4 and Figure 7 As shown, at the inner port of the mounting hole 11, a positioning ring 7 with a conical structure is axially screwed, and annular grooves 8 are circumferentially formed on the non-threaded sections of both the long screw 5 and the short screw 4. The annular grooves 8 are rotatably sleeved with the ports of the corresponding positioning ring 7 facing the first side plate 2.
[0044] By adopting the above technical solution, the positioning ring 7 is axially screwed at the inner port of the mounting hole 11, providing precise axial positioning for the non-threaded sections of the short screw 4 and the long screw 5. This design ensures that the short screw 4 and the long screw 5 will not affect the relative position between the first side plate 2 and the second side plate 3 due to axial movement during rotation, thus guaranteeing the accuracy and stability of the speckle pattern on the speckle printing panel 6. At the same time, the conical cylinder structure of the positioning ring 7 can generate a certain radial supporting force when the short screw 4 and the long screw 5 rotate, helping to prevent the short screw 4 and the long screw 5 from tilting or shifting when subjected to lateral forces, further improving the stability and reliability of the device.
[0045] The design of the annular groove 8 allows the non-threaded sections of the short screw 4 and the long screw 5 to be rotatably sleeved with the port of the positioning ring 7. This structure enables the short screw 4 and the long screw 5 to slide smoothly during rotation, reducing the friction and resistance during rotation. This not only improves the convenience of operation but also reduces the wear caused by friction, extending the service life of the short screw 4 and the long screw 5.
[0046] As Figures 2 to 4 and Figure 7 and Figure 8 shown, the non-threaded sections of both the long screw 5 and the short screw 4 extend out of the end of the fixed disk 1 and are axially fixed with an adjusting knob 9.
[0047] By adopting the above technical solution, the provided adjusting knob 9 facilitates manual grasping and rotation of the long screw 5 and the short screw 4.
[0048] As Figure 3 , Figure 4 and Figure 7 and Figure 8 shown, the long screw 5 and the short screw 4 have the same shape but different sizes; the long screw 5 includes a lower rod body 51 provided with a threaded section, the top of the lower rod body 51 is axially fixed with a limiting rod 511, an upper rod body 52 is axially sleeved and fitted on the limiting rod 511, and the upper rod body 52 has the same outer diameter as the lower rod body 51, and the annular groove 8 is formed between them; the top of the upper rod body 52 is axially fixed with the adjusting knob 9, and the adjusting knob 9 is a hollow cylindrical structure, and a fastening bolt 521 for axially screwing with the limiting rod 511 is arranged inside it.
[0049] By adopting the above technical solution, the long screw rod 5 and the short screw rod 4 have the same shape but different dimensions; both the long screw rod 5 and the short screw rod 4 can adopt a split structure design, making their disassembly and installation simple and fast; when replacement or maintenance is required, the user only needs to loosen the fastening bolt 521, and then the adjusting knob 9 and the upper rod body 52 can be removed from the limiting rod 511, and then the lower rod body 51 can also be removed from the positioning ring 7. Similarly, during installation, only the components need to be assembled in sequence and fixed with the fastening bolt 521; this design improves the maintenance efficiency and flexibility of the device.
[0050] Working principle and usage process of the present utility model:
[0051] When the present utility model is in use, according to the requirement of different speckle sizes for different fields of view, manually rotate the adjusting knob 9 to drive the short screw rod 4 and the long screw rod 5 to rotate, so that the first side plate 2 and the second side plate 3 reciprocate on the inner wall of the fixed disk 1, thereby adjusting the displacement of the convex rod 21 and the convex tube 31 protruding from the convex ring 61, and then obtaining convex points with different diameters, and applying black or white matte paint on the surface of the convex points with this diameter, then the speckle printing can be carried out.
[0052] The above are only the preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.
Claims
1. A speckle making device for multi - size DIC, characterized in that: It includes a fixed plate (1) in the shape of an uncovered rectangular box structure. Mounting holes (11) are symmetrically opened along the longitudinal axis of the bottom surface of the fixed plate (1); a first side plate (2) and a second side plate (3) are slidably sleeved in the fixed plate (1) in sequence from the inside out; through holes one (22) and threaded holes one (23) which are axially opposite to one of the mounting holes (11) are transversely spaced on the first side plate (2); a threaded hole two (33) which is axially opposite to the through hole one (22) is opened on the second side plate (3). A short screw rod (4) and a long screw rod (5) are respectively inserted through the two mounting holes (11); the non-threaded section of the short screw rod (4) is rotatably connected to the corresponding mounting hole (11), and its threaded section is in threaded transmission connection with the threaded hole one (23); a plurality of convex rods (21) arranged disorderly are vertically fixed on the outer vertical surface of the first side plate (2), and the plurality of convex rods (21) are respectively inserted through the through holes two (32) opened on the second side plate (3) with a clearance; the non-threaded section of the long screw rod (5) is rotatably connected to the corresponding mounting hole (11), its threaded section passes through the through hole one (22) with a clearance, and is in threaded transmission connection with the threaded hole two (33); a plurality of convex tubes (31) which are respectively sleeved on the outside of the corresponding convex rods (21) with a clearance are vertically fixed on the outer vertical surface of the second side plate (3). A speckle printing panel (6) is detachably sealed and fitted at the open mouth of the fixed plate (1), and a plurality of through holes three (62) which are respectively inserted through the corresponding convex tubes (31) with a clearance are opened on the speckle printing panel (6), and a convex ring (61) with the same inner diameter as the through hole three (62) is axially fixed at the outer port of the through hole three (62).
2. The speckle making device for multi-size DIC according to claim 1, characterized in that: A positioning ring (7) in a conical cylinder shape is axially screwed at the inner port of the mounting hole (11), and annular grooves (8) are circumferentially opened on the non-threaded sections of both the long screw rod (5) and the short screw rod (4), and the annular grooves (8) are rotatably sleeved on the ports of the corresponding positioning rings (7) facing the first side plate (2).
3. A speckle making device for multi-size DIC according to claim 2, characterized in that: Adjusting knobs (9) are axially fixed at the ends of the non-threaded sections of the long screw rod (5) and the short screw rod (4) extending out of the fixed plate (1).
4. A speckle making device for multi-size DIC according to claim 3, characterized in that: The long screw rod (5) and the short screw rod (4) have the same shape but different sizes; the long screw rod (5) includes a lower rod body (51) provided with a threaded section, a limiting rod (511) is axially fixed at the top of the lower rod body (51), an upper rod body (52) is axially sleeved on the limiting rod (511), and the upper rod body (52) has the same outer diameter as the lower rod body (51), and the annular groove (8) is formed between the two; the adjusting knob (9) is axially fixed at the top of the upper rod body (52), and the adjusting knob (9) is in a hollow cylindrical structure, and a fastening bolt (521) for axially screwing with the limiting rod (511) is arranged inside it.
5. A speckle making device for multi-size DIC according to claim 1, characterized in that: The thicknesses of both the first side plate (2) and the second side plate (3) are 1 cm, and the distance between them is 2 cm.
6. A speckle making device for multi-size DIC according to claim 5, characterized in that: The diameter of the convex rod (21) is 2 mm and the length is 7 cm; the diameter of the convex tube (31) is 3 mm and the length is 4 cm; the diameter of the convex ring (61) is 4 mm and the length is 0.5 cm.
7. A speckle making device for multi-size DIC according to claim 6, characterized in that: The thickness of the speckle printing panel (6) is 1 cm.
8. A speckle making device for multi-size DIC according to claim 7, characterized in that: The materials of the convex rod (21), the convex tube (31), the convex ring (61) and the speckle printing panel (6) are all polymethyl methacrylate.
9. A speckle making device for multi-size DIC according to claim 2, characterized in that: The materials of the fixed disk (1), the first side plate (2), the second side plate (3) and the positioning ring (7) are all carbon steel; the materials of the short screw (4) and the long screw (5) are all stainless steel.