Dot matrix projection calibration device

Abstract

The utility model discloses a dot matrix projection calibration device which comprises a first device shell, a first detachable installation cover is installed at the left end of the first device shell, and an air inlet is formed in the first detachable installation cover. A plurality of air outlets are uniformly formed in the side, away from the first detachable mounting cover, of the outer surface of the first device shell, a first mounting support is fixedly connected to the interior of the first device shell, and a cooling fan is mounted in the center of the first mounting support; and the right end of the first device shell is fixedly connected with a second device shell. By arranging the adjusting motor, the threaded rod and the threaded block, the adjusting motor is started to drive the threaded rod to rotate to indirectly drive the threaded block to move, so that the diffraction grating mechanism moves, the distance between the diffraction grating and the lens is adjusted, the size and strength of a projection point are conveniently changed, and the adjusting convenience is improved.

Description

Technical Field

[0001] This utility model relates to the field of dot matrix projection technology, specifically a dot matrix projection calibration device. Background Technology

[0002] Dot projection is a technology that uses optical principles to project a dot matrix of light spots with a specific pattern onto a target surface. It is widely used in fields such as 3D sensing, structured light systems, and facial recognition. Before dot projection, calibration is required. The calibration device ensures that the projected dot matrix pattern meets the expected requirements. The calibration device mainly performs precise calibration on the dot matrix generated by the dot projector to ensure the accuracy and uniformity of the dot matrix.

[0003] However, existing calibration devices are enclosed and have poor heat dissipation. The internal dot matrix projector generates a high temperature during operation. If the heat cannot be dissipated and the temperature cannot be reduced in time, the dot matrix projector is prone to burnout, reducing the service life of the calibration device. Furthermore, existing calibration devices cannot adjust the distance between the diffraction grating and the lens, making it difficult to change the size and intensity of the projection point. Therefore, a dot matrix projection calibration device is proposed. Utility Model Content

[0004] The purpose of this invention is to provide a dot matrix projection calibration device that can solve the problems of poor heat dissipation and inability to adjust the distance between the diffraction grating and the lens in traditional calibration devices.

[0005] To achieve the above objectives, a dot matrix projection calibration device is provided, including a first device housing, a first detachable mounting cover installed on the left end of the first device housing, an air inlet opened inside the first detachable mounting cover, a plurality of air outlets evenly opened inside the outer surface of the first device housing on the side away from the first detachable mounting cover, a first mounting bracket fixedly connected inside the first device housing, and a cooling fan installed at the center of the first mounting bracket.

[0006] The right end of the first device housing is fixedly connected to the second device housing, and the lower inner surface of the second device housing is fixedly connected to the first housing. The first housing has a threaded groove inside, and an adjustment device is provided inside the threaded groove. The adjustment device includes an adjustment motor, a threaded rod, and a threaded block. A diffraction grating mechanism is provided in the center of the interior of the second device housing, and connecting blocks are fixedly connected to both the upper and lower ends of the diffraction grating mechanism.

[0007] According to the dot matrix projection calibration device, a dustproof net is fixedly connected inside the air inlet, and a protective net is fixedly connected inside the air outlet.

[0008] According to the dot matrix projection calibration device, the output shaft of the adjusting motor is fixedly connected to the threaded rod, and the surface of the threaded rod is connected to the internal thread of the threaded block.

[0009] According to the dot matrix projection calibration device, the inner right end of the threaded groove is mounted and connected to the surface of the adjusting motor, and the surface of the threaded block is slidably connected to the inside of the threaded groove.

[0010] According to the dot matrix projection calibration device, the other end of the threaded rod is fixedly connected to a bearing, and the outer ring of the bearing is fixedly connected to the inner left end of the threaded groove.

[0011] According to the dot matrix projection calibration device, the lower end of the connecting block below is fixedly connected to the upper end of the threaded block, a second outer shell is fixedly connected to the inner upper surface of the second device shell, a sliding groove is opened inside the second outer shell, a slider is slidably connected inside the sliding groove, and the upper end of the connecting block above is fixedly connected to the lower end of the slider.

[0012] According to the dot matrix projection calibration device, a second mounting bracket is fixedly connected inside the housing of the first device. An infrared laser emitter is installed in the center of the second mounting bracket. The infrared laser emitter is located to the right of the cooling fan. Through holes are evenly opened inside the first mounting bracket and the second mounting bracket.

[0013] According to the dot matrix projection calibration device, the outer surface of the left end of the first device housing is threadedly connected to the inner surface of the first removable mounting cover, and the right end of the second device housing is equipped with a second removable mounting cover. A shaping lens is fixedly connected inside the second removable mounting cover, and the outer surface of the right end of the second device housing is threadedly connected to the inner surface of the second removable mounting cover.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. This dot matrix projection calibration device, by setting an air inlet, an air outlet, and a cooling fan, allows the hot air generated inside the calibration device to be discharged from the air outlet by activating the cooling fan, while external cold air enters from the air inlet, thereby cooling the surface of the dot matrix projector and improving the service life of the calibration device.

[0016] 2. This dot matrix projection calibration device, by setting up an adjustment motor, a threaded rod, and a threaded block, drives the threaded rod to rotate by starting the adjustment motor, which in turn drives the threaded block to move, thereby moving the diffraction grating mechanism. This allows for adjustment of the distance between the diffraction grating and the lens, making it convenient to change the size and intensity of the projection point and improving the ease of adjustment.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0019] Figure 1 This is a perspective view of a dot matrix projection calibration device according to the present invention;

[0020] Figure 2 This is a schematic diagram of the internal structure of a dot matrix projection calibration device according to the present invention;

[0021] Figure 3 For the present utility model Figure 2 Enlarged view of point A in the middle;

[0022] Figure 4 For the present utility model Figure 2 Enlarged diagram of point B in the middle.

[0023] In the figure: 1. First device housing; 2. First removable mounting cover; 3. Air inlet; 3001. Dustproof net; 4. Air outlet; 4001. Protective net; 5. First mounting bracket; 6. Cooling fan; 7. Second device housing; 8. First housing; 9. Threaded groove; 10. Adjustment device; 101. Adjustment motor; 102. Threaded rod; 103. Threaded block; 11. Bearing; 12. Diffraction grating mechanism; 13. Connecting block; 14. Second housing; 15. Slide groove; 16. Slider; 17. Second mounting bracket; 18. Infrared laser emitter; 19. Through hole; 20. Second removable mounting cover; 21. Shaping lens. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1-4This utility model provides a technical solution: a dot matrix projection calibration device, including a first device housing 1, a first detachable mounting cover 2 installed on the left end of the first device housing 1, an air inlet 3 opened inside the first detachable mounting cover 2, and a plurality of air outlets 4 evenly opened inside the outer surface of the first device housing 1 away from the first detachable mounting cover 2. A first mounting bracket 5 is fixedly connected inside the first device housing 1, and a cooling fan 6 is installed in the center of the first mounting bracket 5. By setting the air inlet 3, the air outlets 4, and the cooling fan 6, the hot air generated inside the calibration device is discharged from the air outlets 4 by activating the cooling fan 6, while the external cold air enters from the air inlet 3, thereby cooling the surface of the dot matrix projector and improving the service life of the calibration device.

[0026] A second device housing 7 is fixedly connected to the right end of the first device housing 1. A first housing 8 is fixedly connected to the lower inner surface of the second device housing 7. A threaded groove 9 is provided inside the first housing 8. An adjustment device 10 is provided inside the threaded groove 9. The adjustment device 10 includes an adjustment motor 101, a threaded rod 102, and a threaded block 103. A diffraction grating mechanism 12 is provided at the center of the interior of the second device housing 7. Connecting blocks 13 are fixedly connected to the upper and lower ends of the diffraction grating mechanism 12. By setting the adjustment motor 101, threaded rod 102, and threaded block 103, the adjustment motor 101 drives the threaded rod 102 to rotate, indirectly driving the threaded block 103 to move, thereby moving the diffraction grating mechanism 12. This allows for adjustment of the distance between the diffraction grating and the lens, facilitating changes in the size and intensity of the projection point and improving adjustment convenience.

[0027] A dustproof net 3001 is fixedly connected inside the air inlet 3, and a protective net 4001 is fixedly connected inside the air outlet 4. By setting the dustproof net 3001, external dust is blocked from entering the interior of the calibration device, preventing blockage of the calibration device. The protective net 4001 can prevent external impurities from entering the interior of the calibration device through the air outlet 4, avoiding blockage of the calibration device and improving the service life of the calibration device.

[0028] The output shaft of the regulating motor 101 is fixedly connected to the threaded rod 102. The surface of the threaded rod 102 is threadedly connected to the inside of the threaded block 103. The right end of the inside of the threaded groove 9 is installed and connected to the surface of the regulating motor 101. The surface of the threaded block 103 is slidably connected to the inside of the threaded groove 9. The other end of the threaded rod 102 is fixedly connected to a bearing 11. The outer ring of the bearing 11 is fixedly connected to the left end of the inside of the threaded groove 9.

[0029] The lower end of the lower connecting block 13 is fixedly connected to the upper end of the threaded block 103. The upper surface of the inner surface of the second device housing 7 is fixedly connected to the second housing 14. The inner surface of the second housing 14 is provided with a sliding groove 15. The sliding block 16 is slidably connected inside the sliding groove 15. The upper end of the upper connecting block 13 is fixedly connected to the lower end of the sliding block 16. By setting the sliding block 16 to slide inside the sliding groove 15, the range of motion of the diffraction grating mechanism 12 is limited, preventing the diffraction grating mechanism 12 from shaking up and down when it moves, thus improving the stability of adjusting the distance between the diffraction grating and the lens.

[0030] The first device housing 1 has a second mounting bracket 17 fixedly connected inside. An infrared laser emitter 18 is installed in the center of the second mounting bracket 17. The infrared laser emitter 18 is located to the right of the cooling fan 6. The first mounting bracket 5 and the second mounting bracket 17 have through holes 19 evenly distributed inside. The outer surface of the left end of the first device housing 1 is threadedly connected to the inner surface of the first removable mounting cover 2. The right end of the second device housing 7 has a second removable mounting cover 20 installed. A shaping lens 21 is fixedly connected inside the second removable mounting cover 20. The outer surface of the right end of the second device housing 7 is threadedly connected to the inner surface of the second removable mounting cover 20. The infrared laser emitter 18 can be a vertical cavity surface emitter laser, which is a commonly used light source with low power consumption and circular symmetrical beam characteristics, suitable for generating uniform light spots. The diffraction grating mechanism 12 can be a DOE grating. The DOE grating has diffraction or refraction effects and can convert collimated laser into random speckle array or regular array. The shaping lens 21 is mainly used for focusing and collimation to ensure that the dot pattern is clearly imaged on the target surface.

[0031] Working principle: When in use, the power is turned on and the cooling fan 6 is started to dissipate heat inside the calibration device. The hot air generated inside the calibration device is discharged from the air outlet 4, while the cold air outside enters from the air inlet 3 through negative pressure, thereby cooling the surface of the infrared laser emitter 18 and dissipating heat inside the calibration device.

[0032] When adjusting the distance between the diffraction grating and the lens, the adjustment motor 101 is started. The output shaft of the adjustment motor 101 drives the threaded rod 102 to rotate. The surface of the threaded rod 102 drives the threaded block 103 to move. The upper end of the threaded block 103 drives the connecting block 13 to move. The upper end of the connecting block 13 drives the diffraction grating mechanism 12 to move, thereby changing the distance between the diffraction grating mechanism 12 and the shaping lens 21, thus realizing the adjustment of the distance between the diffraction grating and the lens.

[0033] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A dot projection calibration device comprising a first device housing (1), characterized in that, The first device housing (1) is provided with a first detachable mounting cover (2) at the left end. An air inlet (3) is provided inside the first detachable mounting cover (2). Multiple air outlets (4) are evenly provided inside the outer surface of the first device housing (1) on the side away from the first detachable mounting cover (2). A first mounting bracket (5) is fixedly connected inside the first device housing (1). A cooling fan (6) is installed in the center of the first mounting bracket (5). The right end of the first device housing (1) is fixedly connected to the second device housing (7). The lower inner surface of the second device housing (7) is fixedly connected to the first housing (8). The first housing (8) has a threaded groove (9) inside. The threaded groove (9) has an adjustment device (10) inside. The adjustment device (10) includes an adjustment motor (101), a threaded rod (102), and a threaded block (103). The second device housing (7) has a diffraction grating mechanism (12) in the center inside. The upper and lower ends of the diffraction grating mechanism (12) are fixedly connected to connecting blocks (13).

2. A dot projection calibration apparatus as claimed in claim 1, characterized in that: The air inlet (3) is fixedly connected to a dustproof net (3001), and the air outlet (4) is fixedly connected to a protective net (4001).

3. A dot projection calibration apparatus as claimed in claim 1, characterized in that: The output shaft of the regulating motor (101) is fixedly connected to the threaded rod (102), and the surface of the threaded rod (102) is connected to the internal thread of the threaded block (103).

4. The dot projection calibration apparatus of claim 1, wherein: The inner right end of the threaded groove (9) is mounted and connected to the surface of the regulating motor (101), and the surface of the threaded block (103) is slidably connected to the inside of the threaded groove (9).

5. A dot projection calibration apparatus as claimed in claim 1, characterized in that: The other end of the threaded rod (102) is fixedly connected to a bearing (11), and the outer ring of the bearing (11) is fixedly connected to the inner left end of the threaded groove (9).

6. A dot projection calibration apparatus as claimed in claim 1, characterized in that: The lower end of the connecting block (13) is fixedly connected to the upper end of the threaded block (103). The upper inner surface of the second device housing (7) is fixedly connected to the second housing (14). The interior of the second housing (14) is provided with a sliding groove (15). The sliding groove (15) is slidably connected to the sliding block (16). The upper end of the connecting block (13) is fixedly connected to the lower end of the sliding block (16).

7. A dot projection calibration apparatus as claimed in claim 1, characterized in that: The first device housing (1) is fixedly connected to a second mounting bracket (17). An infrared laser emitter (18) is installed in the center of the second mounting bracket (17). The infrared laser emitter (18) is located on the right side of the cooling fan (6). The first mounting bracket (5) and the second mounting bracket (17) are evenly provided with through holes (19).

8. The dot projection calibration apparatus of claim 1, wherein: The outer surface of the left end of the first device housing (1) is threadedly connected to the inner surface of the first removable mounting cover (2). The right end of the second device housing (7) is equipped with a second removable mounting cover (20). A shaping lens (21) is fixedly connected inside the second removable mounting cover (20). The outer surface of the right end of the second device housing (7) is threadedly connected to the inner surface of the second removable mounting cover (20).

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