A size detection device

Abstract

The utility model discloses a size detection device, include: support, top is equipped with image acquisition subassembly, support frame is located in the shooting range of image acquisition subassembly for placing the article of measurement, light source subassembly is located in the outer periphery of article of measurement for projecting light to article of measurement, drive subassembly is cooperated with light source subassembly for driving light source subassembly removes to make light source subassembly along the outer periphery of article of measurement, in multiple directions to article of measurement projects light. The utility model discloses with drive subassembly changes the position of light source subassembly relative to article of measurement, makes the outer periphery of article of measurement can obtain the vertical illumination of light source, makes the outer periphery size of article of measurement obtains high accuracy detection, utilizes the abutment of cam and movable part, realizes the continuous lifting or falling of light source subassembly, makes the arc surface of article of measurement obtain the continuous detection, and the continuity of detection is guaranteed, and the detection accuracy is higher.

Description

Technical Field

[0001] This utility model belongs to the field of industrial visual inspection technology, and in particular relates to a size inspection device. Background Technology

[0002] Chinese patent CN211527262U discloses a "Curved Screen Mobile Phone Glass Arc Dimension Detection Device", which includes a positioning fixture, an arc height measuring device, and an arc width measuring device. The positioning fixture includes a base for placing the mobile phone glass and a side baffle for abutting one side of the mobile phone glass. The arc height measuring device includes a first driving component perpendicular to the base, a height measuring component driven by the first driving component, and a first limiting component for limiting the descent height of the first driving component. The height measuring component includes several sets of first height gauges corresponding to the top surfaces of the two side edges of the mobile phone glass. The arc width measuring device is located on the opposite side of the side baffle and includes a second driving component, a width measuring component driven by the second driving component, and a second limiting component for limiting the translational distance of the second driving component. The width measuring component includes several sets of second height gauges corresponding to the outer edge of the mobile phone glass. After the positioning fixture positions the mobile phone glass, the height measuring component simultaneously measures the height of the curved parts on both sides of the mobile phone glass at multiple points, while the width measuring component simultaneously measures the width of the curved parts of the mobile phone glass at multiple points. The measurement accuracy and efficiency are very high, enabling full inspection of the curved parts of the curved screen. However, its structure is relatively complex, and it can only detect the error in the forming dimensions of the curved screen glass, but cannot obtain the accurate shape of the curved screen glass.

[0003] In the field of industrial vision inspection, especially in the field of transparent object size inspection, phase deflection imaging systems are generally used to output images. However, for transparent objects with curved structures, when inspecting the curved surface, the zero plane position of the camera cannot always be in close contact with the plane where the curved surface curve is located, which affects the imaging quality of the curved surface and cannot guarantee high-precision size inspection. Utility Model Content

[0004] To overcome the shortcomings of the prior art, this utility model provides a size detection device, which uses a driving component to change the position of the light source component to project light onto different positions of the object to be tested, thereby achieving high-precision detection of the object to be tested. The structure is simplified and can be adapted to objects to be tested of different sizes.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a size detection device, comprising:

[0006] The stand has an image acquisition component at the top;

[0007] A support frame, located within the imaging range of the image acquisition component, is used to place the item to be tested;

[0008] A light source assembly is located on the outer periphery of the object to be tested and is used to project light onto the object to be tested;

[0009] A driving component, in conjunction with the light source component, is used to drive the light source component to move so that the light source component projects light onto the test object along the outer periphery in multiple directions.

[0010] Furthermore, the drive assembly includes a power source, a cam connected to the power source, and a movable component that abuts against the cam. The movable component cooperates with the light source assembly, and the cam has a trajectory line for driving the light source assembly to move up and down.

[0011] Furthermore, the object to be tested is transparent glass with an arc-shaped surface in the thickness direction, and the travel of the cam trajectory line driving the light source assembly to move up and down is greater than or equal to the thickness of the part where the arc-shaped surface is located.

[0012] Furthermore, the drive assembly also includes a fixed frame, through which the movable part passes and cooperates with the light source assembly. The fixed frame is provided with a guide sleeve, and the light source assembly is provided with a guide post that extends into the guide sleeve and can move horizontally within the guide sleeve.

[0013] Furthermore, the light source assembly includes a connecting frame, a light source, and a light-blocking component. The connecting frame is provided with a slot, which has an opening facing the object to be tested. The light source is disposed in the slot, and the light-blocking component is disposed in the opening of the slot to adjust the size of the opening.

[0014] Furthermore, the light-blocking component includes a first light-blocking plate and a second light-blocking plate disposed on both sides of the card slot opening. The first light-blocking plate and / or the second light-blocking plate are provided with a travel groove along the height direction, and the connecting frame is provided with a limiting protrusion that can extend into the travel groove.

[0015] Furthermore, the connecting frame is L-shaped, and its length in both directions is greater than the size of the object to be tested.

[0016] Furthermore, the power source includes a stepper motor, a driving wheel that rotates under the drive of the stepper motor, and a driven wheel that meshes with the driving wheel. The central shaft of the driven wheel passes through the vertical plate and is connected to the cam. The vertical plate is connected to the fixed frame.

[0017] Furthermore, the bracket has a slide rail, and the image acquisition component includes an industrial camera and a slider connected to the industrial camera, the slider being able to translate along the slide rail.

[0018] The beneficial effects of this utility model are as follows: By using a driving component to change the position of the light source component relative to the object under test, the outer periphery of the object under test can be vertically illuminated by the light source, enabling high-precision detection of the outer periphery dimensions of the object under test; by utilizing the contact between the cam and the moving part, the light source component can be continuously raised or lowered, allowing continuous detection of the curved surface of the object under test, ensuring the continuity of detection and higher accuracy; different cams can be replaced according to the shape and size of the object under test, not only ensuring detection accuracy but also improving adaptability; the cooperation of the guide sleeve and guide column enables the linear lifting and lowering of the light source component, making the vertical projection of light onto the curved surface of the object under test more controllable and the detection results more accurate. Attached Figure Description

[0019] Figure 1 A perspective view showing the size detection device provided by this utility model and the item to be tested in combination.

[0020] Figure 2 A perspective view showing a portion of the dimension detection device provided by this utility model in conjunction with the object to be measured.

[0021] Figure 3 Partial three-dimensional view of the dimension detection device provided by this utility model Figure 1 .

[0022] Figure 4 Partial three-dimensional view of the dimension detection device provided by this utility model Figure 2 .

[0023] Figure 5 A partial cross-sectional view of the dimension detection device provided by this utility model.

[0024] Figure 6 A partial schematic diagram of the size detection device and the object to be measured provided by this utility model. Figure 1 .

[0025] Figure 7 A partial schematic diagram of the size detection device and the object to be measured provided by this utility model. Figure 2 .

[0026] Figure 8 A side view of the dimension detection device provided by this utility model.

[0027] Figure 9 Schematic diagram of the mating part of the cam and moving part provided by this utility model Figure 1 .

[0028] Figure 10 Schematic diagram of the mating part of the cam and moving part provided by this utility model Figure 2 .

[0029] Figure 11A perspective view of the cam provided by this utility model.

[0030] Among them, 1-bracket, 11-slide rail, 2-image acquisition component, 21-industrial camera, 22-slider, 3-support bracket, 4-item to be measured, 41-arc surface, 5-light source component, 51-connecting bracket, 511-limiting protrusion, 52-light source, 53-light blocking component, 531-first light blocking plate, 532-second light blocking plate, 533-stroke groove, 54-slot, 541-opening, 55-guide column, 6-drive component, 61-power source, 611-stepper motor, 612-drive wheel, 613-driven wheel, 614-central shaft, 62-cam, 63-moving component, 64-fixed bracket, 641-guide sleeve, 65-vertical plate. Detailed Implementation

[0031] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort should fall within the scope of protection of the present invention.

[0032] like Figure 1 As shown, a size detection device includes a bracket 1, a support frame 3 for placing an object 4 to be measured, a light source assembly 5 disposed on the outer periphery of the object 4, and a driving assembly 6. An image acquisition assembly 2 is disposed on the top of the bracket 1, and the support frame 3 is located within the imaging range of the image acquisition assembly 2. The light source assembly 5 is used to project light onto the surface of the object 4 to be measured, and the surface of the object 4 reflects the light to the image acquisition assembly 2.

[0033] The driving component 6 cooperates with the light source component 5 to drive the light source component 5 to move, so that the light source component 5 projects light onto the test object 4 in multiple directions along the outer periphery of the test object 4. The light on the test object 4 is reflected to the image acquisition component 2, and the reflectivity of the surface of the test object 4 is derived using existing technology, thereby obtaining its curvature.

[0034] In this embodiment, the object to be tested 4 is a transparent glass, which is rectangular with a horizontal top and bottom surface and an arc-shaped surface 41 on the side in the thickness direction. The light source component 5 moves up and down in the vertical direction and projects light onto the arc-shaped surface 41 of the object to be tested 4 in multiple height directions. After the light is reflected to the image acquisition component 2, the curvature of the arc-shaped surface 41 is obtained using existing technology. Finally, the image is fitted to achieve high-precision detection of the arc-shaped surface 41 of the object to be tested 4.

[0035] The driving component 6 drives the light source component 5 to reciprocate up and down. It includes a power source 61, a cam 62 connected to the power source 61, and a movable component 63 that abuts against the cam 62. The movable component 63 cooperates with the light source component 5. The cam 62 has a trajectory line for driving the light source component 5 to move up and down. Thus, the power source 61 drives the cam 62 to rotate, which in turn drives the movable component 63 to reciprocate up and down, realizing the reciprocating up and down motion of the light source component 5.

[0036] like Figure 11 As shown, the outer wall of the cam 62 has a spiral protrusion structure. During the rotation of the cam 62 around its rotation center, different parts of its outer wall abut against the moving part 63, driving the moving part 63 to reciprocate up and down. To ensure that the entire thickness direction of the curved surface 41 of the object to be measured 4 can be detected, the trajectory line of the cam 62 drives the light source assembly 5 to move up and down with a stroke greater than or equal to the thickness of the portion containing the curved surface 41. For example... Figure 9 As shown, when the lowest point of cam 62 abuts against movable part 63, the distance between the rotation center of cam 62 and the bottom end of movable part 63 is H1, as follows. Figure 10 As shown, when the highest point of cam 62 abuts against movable part 63, the distance between the rotation center of cam 62 and the bottom end of movable part 63 is H2. Figure 6 As shown, the thickness of the item 4 to be tested is D, then H2-H1 must be greater than or equal to D.

[0037] To ensure the vertical translation of the light source assembly 5, the drive assembly 6 also includes a fixed frame 64. The movable member 63 passes through the fixed frame 64 and engages with the light source assembly 5; this engagement can be a fixed connection. A guide sleeve 641 is provided on the fixed frame 64, and the light source assembly 5 is provided with a guide post 55. The guide post 55 extends into the guide sleeve 641 and can translate within the guide sleeve 641. The sliding engagement between the vertically extending guide post 55 and the guide sleeve 641 ensures the vertical translation of the light source assembly 5. In this embodiment, there are two guide posts 55, located on opposite sides of the movable member 63.

[0038] like Figures 2-5 As shown, the light source assembly 5 includes a connecting frame 51, a light source 52, and a light-blocking component 53. In order to detect the arc surface 41 of the test item 4 in the length and width directions, the connecting frame 51 is L-shaped, and its length in both directions is greater than the size of the test item 4, so that the entire arc surface 41 in the length and width directions of the test item 4 can be completely detected.

[0039] The connecting bracket 51 has a slot 54, which has an opening 541 facing the object to be tested 4. A light source 52 is disposed within the slot 54. In this embodiment, the light source 52 is an LED light strip, which projects light onto the curved surface 41 of the object to be tested 4 through the opening 541. Figure 6As shown, when the lowest point of cam 62 abuts against movable part 63, the light from light source 52 projected vertically onto the object under test 4 is flush with or below the bottom surface of the object under test 4. Figure 7 As shown, when the highest point of the cam 62 abuts against the movable part 63, the light from the light source 52 is perpendicularly projected onto the test object 4, and is either flush with or above the top surface of the test object 4. This ensures that the entire curved surface 41 of the test object 4 is illuminated by light during the up-and-down movement of the light source 52.

[0040] To adjust the concentrated illumination surface of the light source 52, a light-blocking component 53 is provided at the opening 541 of the slot 54. This light-blocking component 53 is used to adjust the size of the opening 541. Specifically, as shown... Figure 3 , Figure 4 , Figure 8 As shown, the light-blocking component 53 includes a first light-blocking plate 531 and a second light-blocking plate 532 disposed on the upper and lower sides of the opening 541 of the slot 54. Figure 5 As shown, the first light-shielding plate 531 has a travel groove 533 along its height direction. The connecting frame 51, located above the opening 541 of the slot 54, has a limiting protrusion 511 that can extend into the travel groove 533 of the first light-shielding plate 531. The second light-shielding plate 532 also has a travel groove 533 along its height direction. The connecting frame 51, located below the opening 541 of the slot 54, has a limiting protrusion 511 that can extend into the travel groove 533 of the second light-shielding plate 532. By moving and locking the limiting protrusion 511 within the travel groove 533, the up-and-down movement of the first light-shielding plate 531 and the second light-shielding plate 532 can be adjusted, thereby adjusting the size of the opening 541. Of course, the travel groove 533 can also be provided only on the first light-shielding plate 531 or only on the second light-shielding plate 532; there is no specific limitation. The loosening and locking structure of the limiting protrusion 511 and the travel groove 533 is achievable with existing technology and will not be described in detail.

[0041] like Figure 3 , Figure 5 As shown, the power source 61 includes a stepper motor 611, a drive wheel 612 that rotates under the drive of the stepper motor 611, and a driven wheel 613 that meshes with the drive wheel 612. The central shaft 614 of the driven wheel 613 passes through the vertical plate 65 and is connected to the cam 62. The vertical plate 65 is fixedly connected to the fixed frame 64, thereby providing a stable support for the fixed frame 64 and making the rotation of the cam 62 more stable.

[0042] The structure of the support frame 3 is not limited. In this embodiment, it consists of two columns and a horizontal tray connected to the columns, with the item to be tested 4 placed on the horizontal tray. The support 1 has a slide rail 11 extending laterally. The image acquisition component 2 includes an industrial camera 21 and a slider 22 connected to the industrial camera 21. The slider 22 can translate along the slide rail 11, thereby moving throughout the entire width of the item to be tested 4, allowing for more complete acquisition of information about the surface of the item to be tested 4.

[0043] This utility model's dimension inspection device is particularly suitable for dimension inspection of 2.5D curved transparent glass. Its working process is as follows: The stepper motor 611 is started to drive the driving wheel 612 to rotate, which in turn drives the driven wheel 613 to rotate, achieving a certain deceleration. Simultaneously, the cam 62 rotates, and the movable part 63, which abuts against the outer wall of the cam 62, reciprocates up and down, realizing the reciprocating movement of the light source assembly 5. This changes the position of the light source 52 directly shining on the curved surface 41 of the object to be measured 4. In other words, it changes the brightest position on the curved surface 41 of the object to be measured 4. At this time, the direction of the light reflected from the curved surface 41 also changes. The light source 52 starts illuminating from the bottom end of the curved surface 41 of the object to be measured 4, utilizing the light source assembly 5 to... The upward movement causes the brightest part of the curved surface 41 to change. At the same time, the industrial camera 21 takes pictures of the test object 4 at a certain frequency to extract the brightest part of the captured image. The cam 62 rotates to the highest point and abuts against the moving part 63. The light source 52 can illuminate the top of the curved surface 41 of the test object 4. The captured image obtained by the industrial camera 21 in this process can be fitted into an image. Based on the relationship between the temporal spatial light source and the surface normal vector of the test object 4, the cam 62 is used to conform to the curved surface 41, and the motion temporal trajectory is fitted into the image with high precision. Based on the change of the image gray value, the high-precision detection of the curved surface 41 is achieved, realizing the purpose of defect inspection. The specific fitting method is the existing technology and will not be described in detail.

[0044] When the thickness of the object to be measured 4 changes, the cam 62 can be replaced. A cam 62 with a trajectory line suitable for the thickness of the object to be measured 4 can be selected. The operation is simple and the adaptability is higher.

[0045] The above specific embodiments are used to explain and illustrate the present utility model, and are not intended to limit the present utility model. Any modifications and changes made to the present utility model within the spirit and scope of the claims shall fall within the protection scope of the present utility model.

Claims

1. A size detection device, characterized in that, include: The bracket (1) has an image acquisition component (2) on top; The support frame (3) is located within the shooting range of the image acquisition component (2) and is used to place the item to be tested (4). A light source assembly (5) is located on the outer periphery of the object to be tested (4) and is used to project light onto the object to be tested (4); The driving component (6), in cooperation with the light source component (5), is used to drive the light source component (5) to move so that the light source component (5) projects light onto the test item (4) in multiple directions along the outer periphery of the test item (4).

2. The size detection device according to claim 1, characterized in that: The drive assembly (6) includes a power source (61), a cam (62) connected to the power source (61), and a movable part (63) abutting against the cam (62). The movable part (63) cooperates with the light source assembly (5). The cam (62) has a trajectory line for driving the light source assembly (5) to move up and down.

3. The size detection device according to claim 2, characterized in that: The test item (4) is transparent glass with an arc-shaped surface (41) in the thickness direction. The trajectory of the cam (62) drives the light source assembly (5) to move up and down with a stroke greater than or equal to the thickness of the part where the arc-shaped surface (41) is located.

4. The size detection device according to claim 2, characterized in that: The drive assembly (6) also includes a fixed frame (64), the movable part (63) passes through the fixed frame (64) and cooperates with the light source assembly (5). The fixed frame (64) is provided with a guide sleeve (641), and the light source assembly (5) is provided with a guide post (55). The guide post (55) extends into the guide sleeve (641) and can move within the guide sleeve (641).

5. The size detection device according to claim 1, characterized in that: The light source assembly (5) includes a connecting frame (51), a light source (52), and a light blocking member (53). The connecting frame (51) is provided with a slot (54), which has an opening (541) facing the object to be tested (4). The light source (52) is located in the slot (54), and the light blocking member (53) is located in the opening (541) of the slot (54) to adjust the size of the opening (541).

6. The size detection device according to claim 5, characterized in that: The light-blocking component (53) includes a first light-blocking plate (531) and a second light-blocking plate (532) disposed on both sides of the opening (541) of the slot (54). The first light-blocking plate (531) and / or the second light-blocking plate (532) are provided with a travel groove (533) along the height direction. The connecting frame (51) is provided with a limiting protrusion (511) that can extend into the travel groove (533).

7. The size detection device according to claim 5, characterized in that: The connecting frame (51) is L-shaped, and its length in both directions is greater than the size of the item to be tested (4).

8. The size detection device according to claim 4, characterized in that: The power source (61) includes a stepper motor (611), a drive wheel (612) that rotates under the drive of the stepper motor (611), and a driven wheel (613) that meshes with the drive wheel (612). The central shaft (614) of the driven wheel (613) passes through the vertical plate (65) and is connected to the cam (62). The vertical plate (65) is connected to the fixed frame (64).

9. The size detection device according to claim 1, characterized in that: The bracket (1) has a slide rail (11), and the image acquisition component (2) includes an industrial camera (21) and a slider (22) connected to the industrial camera (21), the slider (22) being able to translate along the slide rail (11).

Images