A shock-absorbing light sensor suitable for use with a drone

Abstract

The utility model discloses a shock attenuation type light sensor suitable for unmanned plane use belongs to unmanned plane use light sensor field, including light sensor main part, the fixed support of U shape sets at the top of light sensor main part, this shock attenuation type light sensor fixed support suitable for unmanned plane use is fastened with light sensor main part through the connecting bolt of left and right ends and is screwed, and the fixed peg of cooperation roof forms the up and down two -way positioning structure, and the sensor main part is stabilized and clamped, can be compatible with the installation demand of multiple model unmanned plane, has improved the versatility of sensor, through the combination shock attenuation structure of first buffer spring and second buffer spring, forms three -dimensional shock attenuation combination, when generating vibration, the buffer rod drives the up and down displacement of movable plate, and first buffer spring respectively through the stretch and compression absorption vibration energy, and simultaneously, second buffer spring synchronous deformation auxiliary buffering make vibration transmission rate reduce greatly, effectively avoid the phenomenon of light sense displacement.

Description

Technical Field

[0001] This utility model belongs to the field of light sensor technology for drones, specifically relating to a shock-absorbing light sensor suitable for use in drones. Background Technology

[0002] With the rapid development of drone technology, it has been widely used in various fields such as aerial photography, surveying, and inspection. As the core component for drones to acquire ambient light information, the accuracy of the light sensor directly affects the stability and reliability of drone operations. However, during flight, especially in complex terrain or adverse weather conditions, drones experience significant vibrations. These vibrations are directly transmitted to the photosensitive element inside the light sensor, causing displacement or jitter, which in turn affects the accuracy of light signal acquisition and leads to distorted detection data.

[0003] In the existing technology, some UAV optical sensors have simple shock-absorbing structures, such as a single rubber pad, but the shock-absorbing effect is limited and cannot effectively cope with the multi-directional, high-frequency vibrations generated during UAV flight, thus affecting the sensing effect of the optical sensor. Utility Model Content

[0004] The purpose of this invention is to provide a shock-absorbing optical sensor suitable for use in drones, in order to solve the problem mentioned in the background art that although some optical sensors for drones have simple shock-absorbing structures, such as a single rubber pad, the shock-absorbing effect is limited and cannot effectively cope with the multi-directional, high-frequency vibrations generated during drone flight, thus affecting the sensing effect of the optical sensor.

[0005] To achieve the above objectives, this utility model provides the following technical solution: including a light sensor body;

[0006] A U-shaped mounting bracket is positioned above the main body of the light sensor. Two connecting bolts for fixing the mounting bracket are threaded onto both the left and right ends of the mounting bracket, and the tail ends of the connecting bolts are threaded to the main body of the light sensor.

[0007] Two support cylinders are fixedly installed on the upper surface of the fixed frame. A sealing plate for sealing the inside of the support cylinder is fixedly installed inside the fixed frame. A buffer rod is slidably installed through the sealing plate. A movable plate is fixedly installed at the bottom end of the buffer rod.

[0008] The buffer rod is fitted with a first buffer spring whose two ends are fixedly connected to the sealing plate and the movable plate, respectively. Two second buffer springs are fixedly installed on the inner bottom surface of the support cylinder, and the top of the second buffer spring is fixedly connected to the movable plate.

[0009] The top plate is fixedly installed on the top of the two buffer rods. Two fixing bolts for positioning and fixing the main body of the light sensor are threaded on both the left and right ends of the top plate. A damper is installed on the inner bottom surface of the support cylinder, and the top of the damper is in contact with the movable plate.

[0010] The damper is located between the two second buffer springs.

[0011] Using the above solution, the mounting bracket is threadedly fastened to the main body of the photosensitive sensor via connecting bolts at both ends. Together with the fixing bolts on the top plate, it forms a bidirectional positioning structure that stably clamps the main body of the sensor. This design is compatible with the installation requirements of various drone models, improving the sensor's versatility. Through the combined shock absorption structure of the first and second buffer springs, a three-dimensional shock absorption combination is formed. When vibration occurs, the buffer rod drives the movable plate to move up and down. The first buffer spring absorbs vibration energy through stretching and compression, while the second buffer spring deforms synchronously to assist in buffering, significantly reducing the vibration transmission rate and effectively preventing the photosensitive sensor from experiencing displacement of the photosensitive element and signal acquisition distortion due to vibration.

[0012] In the above scheme, it should be noted that the driving element can be a hydraulic rod or an electric push rod, and the driving element is electrically connected to an external power source.

[0013] In a preferred embodiment, the optical sensor body has slots on both the front and rear sides, and a card plate is provided in the slot to position the fixing frame. The card plate is fixedly connected to the fixing frame.

[0014] Using the above solution, the slots on the front and rear sides of the light sensor body and the mounting plate of the fixing frame form a concave-convex fit. When installing the fixing frame, the mounting plate can be embedded in the slot to quickly complete the positioning of the fixing frame, avoiding the offset or misalignment of the fixing frame during the installation process. There is no need to repeatedly calibrate the position of the connecting bolt and the threaded hole, thus improving the installation efficiency.

[0015] In a preferred embodiment, a telescopic rod is provided inside the second buffer spring to fill the interior of the second buffer spring. The telescopic rod is fixedly installed inside the support cylinder, and the telescopic shaft of the telescopic rod is fixedly connected to the movable plate.

[0016] By adopting the above solution, the telescopic rod is filled inside the second buffer spring, which can limit the lateral deformation of the spring and prevent the spring from failing due to high-frequency vibration during the flight of the UAV, such as bending or knotting. This ensures that the first buffer spring always extends and retracts along the axial direction, maintains stable shock absorption performance, and extends the service life of the shock absorption components.

[0017] In a preferred embodiment, a driving element is provided above the front side of the light sensor body, a support plate is fixedly mounted on the upper surface of the driving element, and a cleaning brush for cleaning dust from the lens of the light sensor body is detachably mounted at the end of the output shaft of the driving element through a fixing assembly.

[0018] Using the above solution, the driving element drives the cleaning brush to clean the lens of the light sensor body regularly or as needed. This can effectively remove impurities such as dust and water vapor condensation from the lens surface, avoid detection errors caused by impurities blocking the light signal, and solve the problem of manually cleaning the lens when the drone is operating at high altitude.

[0019] In a preferred embodiment, the fixing component includes a mounting cylinder, which is fixedly mounted on the upper surface of the cleaning brush. The output shaft of the drive element extends into the mounting cylinder. Both the output shaft of the drive element and the mounting cylinder have interconnected through holes. A fixing rod for fixing the mounting cylinder is provided in the through hole.

[0020] Using the above solution, the nested fit between the mounting cylinder and the output shaft of the drive element, along with the positioning structure of the through hole and the fixing rod, enables quick installation and removal of the cleaning brush. The entire replacement process does not require special tools and can be completed by ordinary operators in a short time, greatly improving maintenance efficiency. The fixing rod passes through the through hole of the output shaft of the drive element and the mounting cylinder, forming a radial locking structure, which can effectively resist the vibration and centrifugal force during drone flight, preventing the cleaning brush from loosening or shifting during operation, ensuring the fit between the cleaning brush and the lens surface, and guaranteeing the cleaning effect.

[0021] In a preferred embodiment, a fixing plate is fixedly installed between the two support cylinders, and two telescopic rods are fixedly installed on the front side of the fixing plate to provide telescopic support for the support plate. The support plate is fixedly installed at the ends of the telescopic shafts of the two telescopic rods.

[0022] By adopting the above solution, by setting up the second telescopic rod, the function of the second telescopic rod is to facilitate the movement of the support plate to drive the drive element and the cleaning brush to retract away from the front side of the light sensor body when using the cleaning brush, thereby avoiding the cleaning brush from affecting the operation of the light sensor body.

[0023] In a preferred embodiment, a wedge-shaped groove is provided on the front side of the upper surface of the transverse portion of the fixing frame, and a wedge-shaped plate matching the wedge-shaped groove is installed on the lower surface of the cleaning brush.

[0024] By adopting the above solution, the wedge groove and the wedge plate work together to temporarily fix the cleaning brush to the fixed frame when using the cleaning brush. This avoids the phenomenon of the drive component and the cleaning brush wobbling back and forth, thus improving the stability and firmness of the drive component and the cleaning brush.

[0025] In a preferred embodiment, a rubber pad is installed on the upper surface of the top plate, and guide grooves are provided on both the left and right sides of the inner wall of the support cylinder. A guide plate for guiding the movement trajectory of the movable plate is slidably installed in the guide groove, and the guide plate is fixedly connected to the movable plate.

[0026] Using the above solution, the rubber pad can form a buffer layer between the sensor and the drone mounting surface. On the one hand, it absorbs the high-frequency vibration transmitted from the drone body to the sensor, achieving secondary shock absorption. On the other hand, it can reduce friction noise between the sensor and the body, while avoiding scratches caused by direct contact between the metal top plate and the body. The sliding cooperation between the guide plate and the guide groove restricts the displacement trajectory of the movable plate, ensuring that the movable plate only moves up and down along the axial direction.

[0027] Compared with the prior art, the beneficial effects of this utility model are:

[0028] This shock-absorbing photosensitive sensor mounting bracket for use with drones is fastened to the photosensitive sensor body by connecting bolts at both ends and threads. Together with the fixing bolts on the top plate, it forms a bidirectional positioning structure that stably clamps the sensor body. It is compatible with the installation requirements of various drone models, improving the versatility of the sensor. Through the combination of the first and second buffer springs, a three-dimensional shock-absorbing combination is formed. When vibration occurs, the buffer rod drives the movable plate to move up and down. The first buffer spring absorbs vibration energy through stretching and compression, while the second buffer spring deforms synchronously to assist in buffering, which greatly reduces the vibration transmission rate and effectively avoids the problem of photosensitive element displacement and signal acquisition distortion caused by vibration of the photosensitive sensor body.

[0029] The shock-absorbing light sensor rubber pad for use in drones can form a buffer layer between the sensor and the drone mounting surface. On the one hand, it absorbs the high-frequency vibration transmitted from the drone body to the sensor, achieving secondary shock absorption. On the other hand, it can reduce friction noise between the sensor and the body, while avoiding scratches caused by direct contact between the metal top plate and the body. The sliding fit between the guide plate and the guide groove restricts the displacement trajectory of the movable plate, ensuring that the movable plate only moves up and down along the axial direction. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of this utility model;

[0031] Figure 2 This is a schematic diagram of the main cross-sectional structure of the support cylinder of this utility model;

[0032] Figure 3 This is a schematic diagram of the main cross-sectional structure of the mounting cylinder of this utility model.

[0033] In the diagram: 1. Main body of the light sensor; 2. Fixing frame; 3. Connecting bolt; 4. Support cylinder; 5. Buffer rod; 6. Top plate; 7. Fixing bolt; 8. Sealing plate; 9. First buffer spring; 10. Movable plate; 11. Second buffer spring; 12. Telescopic rod one; 13. Guide plate; 14. Fixing plate; 15. Support plate; 16. Drive element; 17. Cleaning brush; 18. Mounting cylinder; 19. Fixing rod; 20. Telescopic rod two; 21. Rubber pad; 22. Clamping plate; 23. Wedge plate; 24. Damper. Detailed Implementation

[0034] Please see Figure 1-3 This utility model provides a shock-absorbing optical sensor suitable for use in drones, including an optical sensor body 1;

[0035] A U-shaped mounting bracket 2 is set above the main body 1 of the light sensor. Two connecting bolts 3 are threaded on both the left and right ends of the mounting bracket 2 to fix the mounting bracket 2. The tail end of the connecting bolt 3 is threaded to the main body 1 of the light sensor.

[0036] Two support cylinders 4 are fixedly installed on the upper surface of the fixed frame 2. A sealing plate 8 is fixedly installed inside the fixed frame 2 to seal the inside of the support cylinder 4. A buffer rod 5 is slidably installed through the sealing plate 8. A movable plate 10 is fixedly installed at the bottom end of the buffer rod 5.

[0037] Among them, the buffer rod 5 is fitted with a first buffer spring 9 whose two ends are fixedly connected to the sealing plate 8 and the movable plate 10 respectively, and two second buffer springs 11 are fixedly installed on the inner bottom surface of the support cylinder 4. The top end of the second buffer spring 11 is fixedly connected to the movable plate 10.

[0038] The top plate 6 is fixedly installed on the top of the two buffer rods 5. Two fixing bolts 7 for positioning and fixing the light sensor body 1 are threaded on both the left and right ends of the top plate 6. A damper 24 is installed on the inner bottom surface of the support cylinder 4. The top of the damper 24 is in contact with the movable plate 10.

[0039] The damper 24 is located between the two second buffer springs 11. The fixing frame 2 is threadedly fastened to the photosensitive sensor body 1 by the connecting bolts 3 at both ends. Together with the fixing bolts 7 of the top plate 6, it forms a bidirectional positioning structure to stably clamp the sensor body. It is compatible with the installation requirements of various types of UAVs, which improves the versatility of the sensor. Through the combined shock absorption structure of the first buffer spring 9 and the second buffer spring 11, a three-dimensional shock absorption combination is formed. When vibration occurs, the buffer rod 5 drives the movable plate 10 to move up and down. The first buffer spring 9 absorbs vibration energy through stretching and compression respectively. At the same time, the second buffer spring 11 deforms synchronously to assist in buffering, which greatly reduces the vibration transmission rate and effectively avoids the problem of photosensitive element displacement and signal acquisition distortion caused by vibration in the photosensitive sensor body 1.

[0040] The photosensitive sensor body 1 has slots on both the front and rear sides. A locking plate 22 is installed in the slot to position the fixing frame 2. The locking plate 22 is fixedly connected to the fixing frame 2. The slots on the front and rear sides of the photosensitive sensor body 1 and the locking plate 22 of the fixing frame 2 form a concave-convex fit. When installing the fixing frame 2, the locking plate 22 can be inserted into the slot to quickly position the fixing frame 2, avoiding the fixing frame 2 from shifting or misaligning during the installation process. There is no need to repeatedly calibrate the position of the connecting bolt 3 and the threaded hole, thus improving the installation efficiency.

[0041] The second buffer spring 11 is equipped with a telescopic rod 12 that fills the interior of the second buffer spring 11. The telescopic rod 12 is fixedly installed inside the support cylinder 4. The telescopic shaft of the telescopic rod 12 is fixedly connected to the movable plate 10. The telescopic rod 12 fills the interior of the second buffer spring 11, which can limit the lateral deformation of the spring and prevent the spring from bending or knotting due to high-frequency vibration during the flight of the UAV. This ensures that the first buffer spring 9 always extends and contracts along the axial direction, maintains stable shock absorption performance, and extends the service life of the shock absorption component.

[0042] A drive element 16 is provided on the upper front side of the light sensor body 1. A support plate 15 is fixedly installed on the upper surface of the drive element 16. A cleaning brush 17 for cleaning dust from the lens of the light sensor body 1 is detachably installed at the end of the output shaft of the drive element 16 through a fixing component. The drive element 16 drives the cleaning brush 17 to clean the lens of the light sensor body 1 periodically or as needed. This can effectively remove impurities such as dust and water vapor condensation from the lens surface, avoid detection errors caused by impurities blocking the light signal, and solve the problem of manually cleaning the lens when the drone is operating at high altitude.

[0043] The fixing assembly includes a mounting cylinder 18, which is fixedly mounted on the upper surface of the cleaning brush 17. The output shaft of the drive element 16 extends into the mounting cylinder 18. Both the output shaft of the drive element 16 and the mounting cylinder 18 have interconnected through holes. A fixing rod 19 for fixing the mounting cylinder 18 is provided in the through hole. The nested fit between the mounting cylinder 18 and the output shaft of the drive element 16, along with the positioning structure of the through hole and the fixing rod 19, enables quick installation and removal of the cleaning brush 17. The entire replacement process does not require special tools and can be completed by ordinary operators in a short time, greatly improving maintenance efficiency. The fixing rod 19 passes through the through hole of the output shaft of the drive element 16 and the mounting cylinder 18, forming a radial locking structure, which can effectively resist the vibration and centrifugal force during the flight of the drone, prevent the cleaning brush 17 from loosening or shifting during operation, ensure the fit between the cleaning brush 17 and the lens surface, and guarantee the cleaning effect.

[0044] A fixed plate 14 is fixedly installed between the two support cylinders 4. Two telescopic rods 20 for telescopic support of the support plate 15 are fixedly installed on the front side of the fixed plate 14. The support plate 15 is fixedly installed at the ends of the telescopic shafts of the two telescopic rods 20. By setting the telescopic rods 20, the support plate 15 can be moved to drive the drive element 16 and the cleaning brush 17 to retract away from the front side of the light sensor body 1 when the cleaning brush 17 is used, thereby avoiding the cleaning brush 17 from affecting the operation of the light sensor body 1.

[0045] A wedge-shaped groove is provided on the front side of the upper surface of the horizontal part of the fixing frame 2. A wedge plate 23 matching the wedge-shaped groove is installed on the lower surface of the cleaning brush 17. By utilizing the cooperation between the wedge-shaped groove and the wedge plate 23, the cleaning brush 17 can be temporarily fixed on the fixing frame 2 when using the cleaning brush 17, thereby avoiding the phenomenon of back-and-forth shaking of the drive element 16 and the cleaning brush 17, and improving the stability and firmness of the drive element 16 and the cleaning brush 17.

[0046] A rubber pad 21 is installed on the upper surface of the top plate 6. Guide grooves are provided on both the left and right sides of the inner wall of the support cylinder 4. A guide plate 13 is slidably installed in the guide groove to guide the movement trajectory of the movable plate 10. The guide plate 13 is fixedly connected to the movable plate 10. The rubber pad 21 can form a buffer layer between the sensor and the drone mounting surface. On the one hand, it absorbs the high-frequency vibration transmitted from the drone body to the sensor to achieve secondary shock absorption. On the other hand, it can reduce the friction noise between the sensor and the body. At the same time, it avoids scratches caused by direct contact between the metal top plate 6 and the body. The sliding cooperation between the guide plate 13 and the guide groove restricts the displacement trajectory of the movable plate 10, ensuring that the movable plate 10 only moves up and down along the axial direction.

[0047] When using

[0048] First, align the U-shaped opening of the mounting bracket 2 downwards with the light sensor body 1, so that the clamping plate 22 connected to the mounting bracket 2 is inserted into the clamping slots on the front and rear sides of the light sensor body 1, thus completing the pre-positioning of the mounting bracket 2 and the light sensor body 1 and avoiding installation misalignment. Then, tighten the connecting bolts 3 at both ends of the mounting bracket 2 so that the tail end of the connecting bolt 3 is threadedly fastened to the light sensor body 1, thereby achieving a rigid connection between the mounting bracket 2 and the light sensor body 1.

[0049] After the sensor is assembled, the entire device is connected to the drone mounting surface by the fixing bolts 7 at both ends of the top plate 6. The rubber pad 21 on the upper surface of the top plate 6 forms a buffer contact during this process, which not only enhances the installation friction to prevent loosening, but also initially isolates the high-frequency vibration transmitted by the drone body.

[0050] Vibration reduction: When the UAV generates vertical vibration, the vibration energy is transmitted to the buffer rod 5 through the top plate 6. The buffer rod 5 moves downward along the sliding hole of the sealing plate 8 inside the support cylinder 4, causing the movable plate 10 to move downward synchronously. At this time, the first buffer spring 9 is compressed and absorbs part of the vibration energy through deformation. At the same time, the second buffer spring 11 on the bottom surface inside the support cylinder 4 is squeezed and deformed synchronously by the movable plate 10, further consuming the vertical vibration energy. The telescopic rod 12 inside the second buffer spring 11 restricts the lateral displacement of the spring during this process, ensuring that the spring deforms axially and avoiding spring failure.

[0051] When impurities adhere to the lens surface of the light sensor body 1, the support plate 15 is moved forward. The support plate 15 moves to extend the telescopic rod 20, which drives the drive element 16 and the cleaning plate to move. At this time, the movement of the cleaning plate causes the wedge plate 23 to move out of the wedge groove, which can then trigger the drive element 16 to work. The output shaft of the drive element 16 drives the cleaning brush 17 to slide back and forth along the lens surface to clean the impurities. After cleaning is completed, the cleaning brush 17 can be reset.

[0052] When the cleaning brush 17 is worn and needs to be replaced, the mounting cylinder 18 and the fixing rod 19 inside the through hole of the output shaft of the drive element 16 can be pulled out, and the cleaning brush 17 can be removed directly to complete the replacement. There is no need to disassemble the drive element 16, which simplifies the maintenance process. When installing a new cleaning brush 17, simply put the mounting cylinder 18 into the output shaft of the drive element 16, align it with the through hole and insert the fixing rod 19 to complete the fixation, ensuring that the cleaning mechanism can quickly resume operation.

Claims

1. A shock-absorbing optical sensor suitable for use in drones, characterized in that: Including the main body of the light sensor (1); A U-shaped mounting bracket (2) is set above the light sensor body (1). Two connecting bolts (3) for fixing the mounting bracket (2) are threaded on both the left and right ends of the mounting bracket (2). The tail end of the connecting bolt (3) is threaded to the light sensor body (1). Two support cylinders (4) are fixedly installed on the upper surface of the fixed frame (2). A sealing plate (8) for sealing the inside of the support cylinder (4) is fixedly installed inside the fixed frame (2). A buffer rod (5) is slidably installed through the sealing plate (8). A movable plate (10) is fixedly installed at the bottom end of the buffer rod (5). Among them, the buffer rod (5) is fitted with a first buffer spring (9) whose two ends are fixedly connected to the sealing plate (8) and the movable plate (10) respectively, and two second buffer springs (11) are fixedly installed on the inner bottom surface of the support cylinder (4). The top end of the second buffer spring (11) is fixedly connected to the movable plate (10). The top plate (6) is fixedly installed on the top of the two buffer rods (5). Two fixing bolts (7) for positioning and fixing the light sensor body (1) are threaded on both the left and right ends of the top plate (6). A damper (24) is installed on the inner bottom surface of the support cylinder (4). The top of the damper (24) is in contact with the movable plate (10). The damper (24) is located between the two second buffer springs (11).

2. The shock-absorbing optical sensor suitable for use in UAVs according to claim 1, characterized in that: The light sensor body (1) has slots on both the front and rear sides. The slots are equipped with a card plate (22) for positioning the fixed frame (2). The card plate (22) is fixedly connected to the fixed frame (2).

3. The shock-absorbing optical sensor suitable for use in UAVs according to claim 1, characterized in that: The second buffer spring (11) is provided with a telescopic rod (12) for filling the interior of the second buffer spring (11). The telescopic rod (12) is fixedly installed in the support cylinder (4), and the telescopic shaft of the telescopic rod (12) is fixedly connected to the movable plate (10).

4. The shock-absorbing optical sensor suitable for use in UAVs according to claim 1, characterized in that: A drive element (16) is provided on the upper front side of the light sensor body (1). A support plate (15) is fixedly installed on the upper surface of the drive element (16). A cleaning brush (17) for cleaning dust from the lens of the light sensor body (1) is detachably installed at the end of the output shaft of the drive element (16) through a fixing assembly.

5. The shock-absorbing optical sensor suitable for use in UAVs according to claim 4, characterized in that: The fixing assembly includes a mounting cylinder (18), which is fixedly mounted on the upper surface of the cleaning brush (17). The output shaft of the driving element (16) extends into the mounting cylinder (18). Both the output shaft of the driving element (16) and the mounting cylinder (18) are provided with interconnected through holes. The same fixing rod (19) for fixing the mounting cylinder (18) is provided in the through holes.

6. The shock-absorbing optical sensor suitable for use in UAVs according to claim 4, characterized in that: A fixing plate (14) is fixedly installed between the two support cylinders (4). Two telescopic rods (20) for telescopic support of the support plate (15) are fixedly installed on the front side of the fixing plate (14). The support plate (15) is fixedly installed at the end of the telescopic shaft of the two telescopic rods (20).

7. The shock-absorbing optical sensor suitable for use in UAVs according to claim 4, characterized in that: The front side of the upper surface of the horizontal part of the fixing frame (2) is provided with a wedge-shaped groove, and the lower surface of the cleaning brush (17) is equipped with a wedge plate (23) that matches the wedge-shaped groove.

8. The shock-absorbing optical sensor suitable for use in UAVs according to claim 1, characterized in that: A rubber pad (21) is installed on the upper surface of the top plate (6). Guide grooves are provided on both the left and right sides of the inner wall of the support cylinder (4). A guide plate (13) for guiding the movement trajectory of the movable plate (10) is slidably installed in the guide groove. The guide plate (13) is fixedly connected to the movable plate (10).

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