Automatic alignment mechanism for searching Mark point through micro-area visual system

Abstract

The utility model provides an automatic alignment mechanism for searching Mark points through a micro-area visual system, and relates to the technical field of visual alignment mechanisms. The automatic alignment mechanism for finding the Mark point through the micro-area visual system comprises a machine shell assembly, wherein the machine shell assembly comprises a bearing plate; the camera supporting assembly is arranged on the bearing plate; the movable sliding table is arranged on the camera supporting assembly; the visual device comprises a camera, the camera is arranged on the movable sliding table, and the movable sliding table is used for adjusting the height position of the camera; the displacement recognition assembly comprises a displacement meter and a mounting seat, the mounting seat is arranged on the bearing plate, and the displacement meter is arranged on the mounting seat and used for detecting the distance between a detected sample and the displacement meter. According to the invention, the micro-area visual range of the camera can be conveniently adjusted.

Description

Technical Field

[0001] The present application relates to the technical field of visual alignment mechanisms, and in particular to an automatic alignment mechanism for finding mark points through a micro-area visual system. Background Art

[0002] Mark points, also called reference points or position identification points, are positioning points used to guide automatic placement machines to place components in circuit board design. Their main function is to serve as common measurable points for all steps in surface mount technology, helping SMT equipment to accurately locate components on PCB boards. Mark points usually include a solid circular marking point and an open area corresponding to it.

[0003] In the solder paste printing and lamination industry, high-precision repeated alignment is often required. In the relevant technology, a visual automatic alignment mechanism is generally used for repeated alignment. The visual automatic alignment mechanism includes a camera, and a recognition module is arranged inside the camera. The shooting range of the camera is called the micro-area visual range, and the camera and the recognition module are called the micro-area visual system. An alignment platform is arranged below the camera, and the alignment platform is used to place the sample to be tested. The alignment platform can move in three-dimensional space, that is, the alignment platform can adjust the position of the sample to be tested in the X-axis, Y-axis and Z-axis coordinates. After the alignment platform adjusts the sample to be tested, the camera takes an image of the sample to be tested and identifies the position identification point. Finally, the position of the sample to be tested is corrected so that the sample to be tested falls within the allowable error range relative to the reference position.

[0004] However, the position of the camera in the related art is relatively fixed, which makes it difficult to adjust the micro-area visual range of the camera and has poor applicability. In addition, when the alignment platform adjusts the position of the sample to be tested, the height of the sample to be tested is likely to be mismatched with the height of the camera, which in turn causes the image taken by the camera to be unclear, affecting the recognition accuracy. Utility Model Content

[0005] In order to facilitate the adjustment of the micro-area visual range of the camera, the present application provides an automatic alignment mechanism for finding Mark points through a micro-area visual system.

[0006] The present application provides an automatic alignment mechanism for finding Mark points through a micro-area visual system, which adopts the following technical solutions:

[0007] An automatic alignment mechanism for finding mark points through a micro-area visual system, comprising:

[0008] A housing assembly, the housing assembly comprising a load-bearing plate;

[0009] A camera support assembly, wherein the camera support assembly is disposed on the carrying plate;

[0010] A movable slide, wherein the movable slide is arranged on the camera support assembly;

[0011] A visual device, the visual device comprising a camera, the camera is arranged on the movable slide, and the movable slide is used to adjust the height position of the camera;

[0012] The displacement identification component includes a displacement meter and a mounting seat, wherein the mounting seat is arranged on the bearing plate, the displacement meter is arranged on the mounting seat, and the displacement meter is used to detect the height of the sample being measured.

[0013] By adopting the above technical solution, when the alignment platform adjusts the position of the sample to be tested, the displacement meter can detect and feedback the height of the sample to be tested, so that the sample to be tested can be at the correct height, improving the clarity of the camera shooting. The mobile slide can adjust the height of the camera, so that it is easy to adjust the micro-area visual range of the camera. The camera captures the image of the sample to be tested, and by finding the position identification point on the sample to be tested, the coordinate difference between the position identification point and the measured point can be calculated, thereby accurately identifying the measured point of the sample to be tested.

[0014] Optionally, the visual device further comprises:

[0015] A telecentric lens, wherein the telecentric lens is arranged on the camera;

[0016] A support base is connected to the supporting plate, the support base is provided with a visual window, the telecentric mirror faces the visual window; the camera takes pictures of the sample to be tested through the telecentric mirror and the visual window in turn.

[0017] By adopting the above technical solution, the camera can take pictures of the sample under test through the telecentric lens and the visible window in sequence, which can improve the imaging quality.

[0018] Optionally, a coaxial light source is provided in the visual window, and the coaxial light source is used to illuminate the sample to be tested.

[0019] By adopting the above technical solution, the coaxial light source can illuminate the sample to be tested, increase the amount of light entering the camera, and thus improve the clarity of the shooting.

[0020] Optionally, the displacement identification component further includes:

[0021] A fixing seat connected to the mounting seat;

[0022] A mounting block is detachably connected to the fixing seat, and the mounting block and the fixing seat clamp the displacement meter.

[0023] By adopting the above technical solution, the fixing seat is connected to the mounting seat, and then the mounting block is detachably connected to the fixing seat. The mounting block and the fixing seat can clamp the displacement meter, which is convenient for installing or removing the displacement meter.

[0024] Optionally, the camera support assembly includes:

[0025] A supporting end plate, the supporting end plate being connected to the bearing plate;

[0026] A connecting frame plate is connected to the supporting end plate, and the movable slide is arranged in the connecting frame plate.

[0027] By adopting the above technical solution, the supporting end plate can provide supporting force for the connecting frame plate, the connecting frame plate can provide supporting force for the movable slide, and the connecting frame plate can protect the movable slide and the camera.

[0028] Optionally, the camera support assembly further includes a support frame, wherein the support frame is connected to the bearing plate, and the support frame is connected to the support end plate.

[0029] By adopting the above technical solution, the support frame can provide supporting force for the support end plate, and the support frame can improve the structural strength of the support end.

[0030] Optionally, the movable slide comprises:

[0031] A base block, the base block being connected to the connecting frame plate;

[0032] A sliding block, the sliding block is slidably connected to the base block, and the camera is arranged on the sliding block;

[0033] A rack, the rack being arranged on the base block;

[0034] A rotating rod, the rotating rod being rotatably connected to the sliding block;

[0035] A gear is coaxially connected to the rotating rod and meshes with the rack.

[0036] By adopting the above technical solution, when the rotating rod is rotated, the gear can be driven to rotate. Since the gear is engaged with the rack, the sliding block can slide relative to the base block, so that the sliding block drives the camera to move up and down, thereby adjusting the micro-area visual range of the camera.

[0037] Optionally, the movable slide further includes:

[0038] An adjusting knob, the adjusting knob being coaxially connected to the rotating rod;

[0039] A locking knob is threadedly connected to the sliding block, and an end of the locking knob can abut against the rotating rod.

[0040] By adopting the above technical solution, turning the adjustment knob can easily drive the rotating rod to rotate. When the sliding platform adjusts the camera to a suitable position, the locking knob is turned, and the end of the locking knob abuts against the rotating rod, thereby locking the rotating rod to fix the height of the camera.

[0041] Optionally, the housing assembly includes a protective cover, and the protective cover includes a camera protective cover and a visual positioning protective cover;

[0042] The camera protective cover and the visual positioning protective outer cover are both connected to the carrying plate, the camera protective cover is arranged on the outside of the camera, and the visual positioning protective outer cover is arranged on the outside of the displacement identification component.

[0043] By adopting the above technical solution, the camera protection cover can protect the camera, and the visual positioning protection cover can protect the displacement recognition component.

[0044] Optionally, the housing assembly further includes:

[0045] A cable shield connected to the bearing plate;

[0046] A cable cover is connected to the cable shield, both the cable shield and the cable cover are provided with channels, and the channel of the cable shield is communicated with the channel of the cable cover.

[0047] By adopting the above technical solution, the cable of the camera can pass through the channel of the cable shield and the channel of the cable outer cover in sequence, so that the cable of the camera is electrically connected with the external cable to transmit power and signals.

[0048] In summary, the present application includes at least one of the following beneficial effects:

[0049] 1. When the alignment platform adjusts the position of the sample to be tested, the displacement meter can detect and feedback the height of the sample to be tested, so that the sample to be tested can be at the correct height, improving the clarity of the camera shooting;

[0050] 2. When the rotating rod is rotated, the gear can be driven to rotate. Since the gear is meshed with the rack, the sliding block can slide relative to the base block, so that the sliding block drives the camera to move up and down, thereby adjusting the micro-area visual range of the camera;

[0051] 3. The camera can take pictures of the sample under test through the telecentric lens and the visible window in turn. The coaxial light source can illuminate the sample under test, increase the amount of light entering the camera, and thus improve the clarity of the shooting. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 It is a schematic diagram of the overall structure of the automatic alignment mechanism of an embodiment of the present application;

[0053] Figure 2 is a schematic diagram of the structure of the automatic alignment mechanism of the embodiment of the present application after the protective cover is removed;

[0054] Figure 3 is a bottom-up structural schematic diagram of the automatic alignment mechanism of an embodiment of the present application;

[0055] Figure 4 It is a structural schematic diagram of a mobile slide in an embodiment of the present application;

[0056] Figure 5 It is a schematic diagram showing the internal structure of the mobile slide according to an embodiment of the present application.

[0057] Explanation of the reference numerals: 1. housing assembly; 11. protective cover; 111. camera protective cover; 112. visual positioning protective cover; 12. load-bearing plate; 121. wiring trough; 13. cable cover; 14. cable cover; 2. camera support assembly; 21. support frame; 22. support end plate; 23. connecting frame plate; 231. side plate; 232. support vertical plate; 3. movable slide; 31. base block; 32. sliding block; 33. rack; 34. adjustment knob; 35. rotating rod; 36. gear; 37. locking knob; 4. visual device; 41. camera; 42. camera mounting plate; 43. telecentric mirror; 44. support base; 45. coaxial light source; 5. displacement identification assembly; 51. displacement meter; 52. mounting seat; 53. fixing seat; 54. mounting block. DETAILED DESCRIPTION

[0058] The following is combined with Figure 1-5 This application is described in further detail.

[0059] The embodiment of the present application provides an automatic alignment mechanism for finding mark points through a micro-area visual system.

[0060] refer to Figure 1 and Figure 2The automatic alignment mechanism for finding the Mark point through the micro-area visual system includes a housing component 1, which includes a bearing plate 12, a cable shield 13 and a cable outer cover 14. The cable shield 13 and the cable outer cover 14 are both fixedly connected to the bearing plate 12. The cable shield 13 and the cable outer cover 14 are both provided with a channel for the cable to pass through, and the channels of the cable shield 13 and the cable outer cover 14 are connected. A wiring groove 121 is provided on the top of the bearing plate 12, and the wiring groove 121 is connected with the channel of the cable shield 13. The cables of the present application pass through the wiring groove 121, the channel in the cable shield 13 and the channel in the cable outer cover 14 in sequence and can be connected to external cables to realize power and signal transmission.

[0061] refer to Figure 2 and Figure 3 , a camera support assembly 2 is arranged on the carrier plate 12, and the camera support assembly 2 includes a support frame 21, a support end plate 22 and a connection frame plate 23. The support frame 21 is fixedly connected to the carrier plate 12, and the support frame 21 is perpendicular to the carrier plate 12. The support end plate 22 is fixedly connected to the carrier plate 12, the support end plate 22 is horizontally arranged, and the support end plate 22 is fixedly connected to the support frame 21. The connection frame plate 23 includes a side plate 231 and a support vertical plate 232, two side plates 231 are arranged, the two side plates 231 are arranged at intervals, the two side plates 231 are fixedly connected to the carrier plate 12, and the support vertical plates 232 are fixedly connected to the two side plates 231 respectively. The two side plates 231 and the support vertical plates 232 are fixedly connected to the support end plates 22, and the two side plates 231, the support vertical plates 232 and the carrier plate 12 are surrounded to form a receiving space.

[0062] refer to Figure 2 and Figure 4 A movable slide 3 is arranged in the accommodating space of the connecting frame plate 23, and the displacement slide includes a base block 31 and a sliding block 32. The base block 31 is fixedly connected to the supporting vertical plate 232, and the sliding block 32 is slidably connected to the base block 31. The sliding direction of the sliding block 32 and the base block 31 is a vertical direction.

[0063] refer to Figure 4 and Figure 5The displacement slide also includes a rack 33, an adjusting knob 34, a rotating rod 35, a gear 36 and a locking knob 37. The rack 33 is vertically arranged, and the rack 33 is fixedly connected to the base block 31. The rotating rod 35 is horizontally arranged, and the rotating rod 35 is rotatably connected to the sliding block 32. The gear 36 is sleeved on the rotating rod 35 and fixedly connected to the rotating rod 35, and the gear 36 is meshed with the rack 33. The adjusting knob 34 is located on the outer side of the sliding block 32, and the adjusting knob 34 is coaxial with the end of the rotating rod 35 and fixedly connected. When the adjusting knob 34 is turned, the gear 36 can be driven to rotate, and since the gear 36 is meshed with the rack 33, the sliding block 32 and the base block 31 can move relative to each other. The locking knob 37 is threadedly connected to the sliding block 32, and the end of the locking knob 37 can abut against the rotating rod 35. When the locking knob 37 is turned and pressed against the rotating rod 35 , the rotation of the rotating rod 35 can be restricted, thereby locking the movement of the sliding block 32 .

[0064] refer to Figure 2 and Figure 3 , a visual device 4 is provided on the sliding block 32, and the visual device 4 includes a camera 41, a camera mounting plate 42, a telecentric mirror 43 and a support base 44. The camera mounting plate 42 is fixedly connected to the sliding block 32, and the camera 41 is fixedly connected to the camera mounting plate 42. One end of the telecentric mirror 43 is fixedly connected to the camera 41, and the support base 44 is fixedly connected to the carrier plate 12. The support base 44 is provided with a visual window, and the end of the telecentric mirror 43 away from the camera 41 is located in the visual window. The visual window is coaxial with the telecentric mirror 43, and light can pass through the telecentric mirror 43 into the camera 41, so that the camera 41 can take pictures of the sample under test below through the visual window. The shooting range of the camera 41 is called the micro-area visual range.

[0065] refer to Figure 3 The visual device 4 also includes a coaxial light source 45, which is fixedly connected to the visual window of the support base 44. The coaxial light source 45 can emit light to illuminate the sample to be tested, thereby increasing the amount of light entering the camera 41 and thus improving the clarity of the shooting.

[0066] refer to Figure 2 and Figure 3 , a displacement identification component 5 is provided on the bearing plate 12, and the displacement identification component 5 includes a displacement meter 51, a mounting seat 52, a fixing seat 53 and a mounting block 54. The mounting seat 52 is fixedly connected to the bearing plate 12, the fixing seat 53 is detachably connected to the mounting seat 52 by bolts, the mounting block 54 is detachably connected to the fixing seat 53 by bolts, and the displacement meter 51 is clamped between the fixing seat 53 and the mounting block 54. A window is provided on the support base 44, and the displacement meter 51 specifically adopts a distance sensor, which can detect the height coordinate of the sample under test, that is, the Z-axis coordinate, through the window.

[0067] refer to Figure 1and Figure 2 The protective cover 11 includes a camera protective cover 111 and a visual positioning protective outer cover 112. The camera protective cover 111 and the visual positioning protective outer cover 112 are both shells. The camera protective cover 111 is fixedly connected to the upper side of the carrier plate 12, and the camera protective cover 111 is arranged on the outside of the camera support component 2, the movable slide 3 and the camera 41. The visual positioning protective outer cover 112 is fixedly connected to the lower side of the carrier plate 12, and the visual positioning protective outer cover 112 is arranged on the outside of the displacement recognition component 5.

[0068] The implementation principle of the automatic alignment mechanism for finding the Mark point through the micro-area visual system of the present application is as follows: the mobile slide 3 can adjust the height of the camera 41, so as to facilitate the adjustment of the micro-area visual range of the camera 41. When the alignment platform adjusts the position of the sample to be measured, the displacement meter 51 can detect and feedback the height of the sample to be measured, so that the sample to be measured can be at the correct height, improving the clarity of the camera 41. The camera 41 captures the image of the sample to be measured, and by finding the position identification point on the sample to be measured, the coordinate difference from the position identification point to the measured point can be calculated. Through the above two automatic alignments, the measured point of the sample to be measured can be accurately identified.

[0069] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An automatic alignment mechanism for finding Mark points through a micro-area visual system, characterized in that: include: A casing assembly (1), the casing assembly (1) comprising a bearing plate (12); A camera support assembly (2), wherein the camera support assembly (2) is arranged on the carrying plate (12); A movable slide (3), wherein the movable slide (3) is arranged on the camera support assembly (2); A visual device (4), the visual device (4) comprising a camera (41), the camera (41) being arranged on the movable slide (3), the movable slide (3) being used to adjust the height position of the camera (41); A displacement identification component (5), the displacement identification component (5) comprising a displacement meter (51) and a mounting seat (52), the mounting seat (52) being arranged on the supporting plate (12), the displacement meter (51) being arranged on the mounting seat (52), and the displacement meter (51) being used to detect the height of a sample being measured.

2. The automatic alignment mechanism for finding Mark points through a micro-area visual system according to claim 1, characterized in that: The visual device (4) further comprises: A telecentric lens (43), wherein the telecentric lens (43) is arranged on the camera (41); A support base (44), the support base (44) being connected to the carrier plate (12), the support base (44) being provided with a visual window, the telecentric mirror (43) facing the visual window; and the camera (41) taking pictures of the sample to be tested through the telecentric mirror (43) and the visual window in sequence.

3. The automatic alignment mechanism for finding Mark points through a micro-area visual system according to claim 2, characterized in that: A coaxial light source (45) is arranged in the visible window, and the coaxial light source (45) is used to illuminate the sample to be tested.

4. The automatic alignment mechanism for finding Mark points through a micro-area visual system according to claim 1, characterized in that: The displacement identification component (5) further comprises: A fixing seat (53), the fixing seat (53) being connected to the mounting seat (52); A mounting block (54), the mounting block (54) being detachably connected to the fixing seat (53), and the mounting block (54) and the fixing seat (53) clamping the displacement meter (51).

5. The automatic alignment mechanism for finding Mark points through a micro-area visual system according to claim 1, characterized in that: The camera support assembly (2) comprises: A supporting end plate (22), the supporting end plate (22) being connected to the bearing plate (12); A connecting frame plate (23), wherein the connecting frame plate (23) is connected to the supporting end plate (22), and the movable slide (3) is arranged in the connecting frame plate (23).

6. The automatic alignment mechanism for finding Mark points through a micro-area visual system according to claim 5, characterized in that: The camera support assembly (2) further comprises a support frame (21), wherein the support frame (21) is connected to the bearing plate (12), and the support frame (21) is connected to the support end plate (22).

7. The automatic alignment mechanism for finding Mark points through a micro-area visual system according to claim 5, characterized in that: The movable slide (3) comprises: A base block (31), the base block (31) being connected to the connecting frame plate (23); A sliding block (32), the sliding block (32) being slidably connected to the base block (31), and the camera (41) being arranged on the sliding block (32); A rack (33), wherein the rack (33) is arranged on the base block (31); A rotating rod (35), the rotating rod (35) being rotatably connected to the sliding block (32); A gear (36), the gear (36) is coaxially connected to the rotating rod (35), and the gear (36) is meshed with the rack (33).

8. The automatic alignment mechanism for finding Mark points through a micro-area visual system according to claim 7, characterized in that: The movable slide (3) further comprises: an adjusting knob (34), the adjusting knob (34) being coaxially connected to the rotating rod (35); A locking knob (37), the locking knob (37) being threadedly connected to the sliding block (32), and an end of the locking knob (37) being capable of abutting against the rotating rod (35).

9. The automatic alignment mechanism for finding Mark points through a micro-area visual system according to claim 1, characterized in that: The housing assembly (1) comprises a protective cover (11), wherein the protective cover (11) comprises a camera protective cover (111) and a visual positioning protective outer cover (112); The camera protection cover (111) and the visual positioning protection outer cover (112) are both connected to the carrier plate (12); the camera protection cover (111) is disposed on the outside of the camera (41); and the visual positioning protection outer cover (112) is disposed on the outside of the displacement identification component (5).

10. The automatic alignment mechanism for finding Mark points through a micro-area visual system according to claim 1, characterized in that: The housing assembly (1) further comprises: A cable shield (13), the cable shield (13) being connected to the bearing plate (12); A cable outer cover (14), the cable outer cover (14) being connected to the cable protective cover (13), the cable protective cover (13) and the cable outer cover (14) both being provided with a channel, the channel of the cable protective cover (13) being in communication with the channel of the cable outer cover (14).

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