Unmanned aerial vehicle camera multi-dimensional shock absorption anti-shake mounting bracket

Abstract

This invention discloses a multi-dimensional vibration reduction and image stabilization mounting bracket for a drone camera, belonging to the field of image stabilization bracket technology. It includes a connecting plate, with a mounting plate connected to the bottom of the connecting plate via four sets of damping shock-absorbing balls. A microcontroller is located above the mounting plate. Below the mounting plate, a first rotating block is rotatably connected to a first brushless motor via a first connecting arm. The first rotating block is connected to a second motor housing via an L-shaped second connecting arm. The second motor housing is rotatably connected to a fixed bracket via the second brushless motor. An inertial measurement unit and a gyroscope sensor are integrated on the fixed bracket. The advantages are: the microcontroller receives sensor data and controls the dual motors to achieve dual-axis active image stabilization compensation for yaw and pitch. Combined with the multi-dimensional passive vibration absorption of the damping shock-absorbing balls, it forms a two-stage composite image stabilization system of "passive isolation + dual-axis active compensation," effectively coping with complex flight disturbances.

Description

Technical Field

[0001] This invention relates to the field of image stabilization bracket technology, specifically to a multi-dimensional shock absorption and image stabilization mounting bracket for drone cameras. Background Technology

[0002] Drone photography refers to the technology and practice of using unmanned aerial vehicles (UAVs) as aerial platforms, equipped with cameras or video recording equipment, to acquire dynamic images or still photos from an aerial perspective. However, during the flight of a UAV, vibrations from the fuselage motors and airflow disturbances are directly transmitted to the camera equipment, causing image shaking and blurry images.

[0003] For example, Chinese Patent (CN218949527U) discloses a surveying drone with camera image stabilization. Addressing the issue that existing surveying drones cannot compensate for minor camera shake caused by the drone during surveying tasks, resulting in volatile images, the present invention proposes the following solution: It includes a drone body, two support frames, a stabilizer, an adjuster, a camera, and a connecting assembly. Both support frames are fixedly mounted on the bottom of the drone body. The stabilizer is positioned between the two support frames, and its bottom has a fixing groove. The adjuster is rotatably mounted within the fixing groove, and its bottom has an installation groove. This invention's surveying drone can compensate for minor camera shake caused by the drone during surveying tasks, resulting in more stable image capture.

[0004] Existing technologies use stabilizers and adjusters to stabilize cameras, but their vibration reduction methods are relatively simple, mainly relying on the rotation adjustment of mechanical structures to counteract shaking, lacking multi-stage vibration reduction and active sensing compensation mechanisms. During drone flight, high-frequency vibrations and low-frequency shaking coexist, and passive adjustment of a single structure is insufficient to achieve comprehensive, multi-frequency vibration suppression. Especially in high-altitude wind disturbances and complex airflow environments, image stability remains difficult to guarantee. To address these issues, a multi-dimensional vibration reduction and image stabilization mounting bracket for drone cameras is proposed. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a multi-dimensional vibration reduction and image stabilization mounting bracket for drone cameras. This solves the problem that current methods primarily rely on the rotational adjustment of mechanical structures to counteract shaking, lacking multi-level vibration reduction and active sensing compensation mechanisms. During drone flight, high-frequency vibrations and low-frequency shaking coexist. Passive adjustment using a single structure is insufficient to achieve comprehensive, multi-frequency vibration suppression, especially in high-altitude wind disturbances and complex airflow environments, where image stability remains difficult to guarantee.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a multi-dimensional vibration reduction and anti-shake mounting bracket for a drone camera, comprising a connecting plate, wherein damping shock-absorbing balls are fixedly connected to the four corners of the bottom of the connecting plate, and a mounting plate with a concave center is fixedly connected to the bottom of the four sets of damping shock-absorbing balls; a microcontroller is fixedly mounted on the top of the mounting plate, and a first connecting arm is fixedly connected to the rear bottom of the microcontroller, wherein a first brushless motor is mounted on the first connecting arm, and a first rotating block is connected to the output end of the first brushless motor to drive the first rotating block to rotate; an L-shaped second connecting arm is fixedly connected to the right side of the first rotating block, and a second motor housing is fixedly connected to the front side of the second connecting arm, wherein a second brushless motor is mounted on the second motor housing, and a fixed bracket is rotatably connected to the output end of the second brushless motor to drive the fixed bracket to rotate; an inertial measurement unit and a gyroscope sensor for detecting attitude changes are fixedly mounted on the fixed bracket; the microcontroller is electrically connected to the inertial measurement unit, the gyroscope sensor, the first brushless motor, and the second brushless motor respectively, and is used to control the two sets of brushless motors to perform active anti-shake compensation according to the received attitude change data.

[0007] Preferably, a first mounting groove is provided at the bottom of the first connecting arm, and a first brushless motor that drives the first rotating block to rotate is fixedly installed inside the first mounting groove.

[0008] Preferably, a second mounting slot is provided on the left side of the second motor housing, and a second brushless motor that drives the fixed bracket to rotate is fixedly installed inside the second mounting slot.

[0009] Preferably, a magnetic sensor is fixedly installed at the bottom of the fixed bracket on the left side of the inertial measurement unit, and an acceleration sensor is fixedly installed at the bottom of the fixed bracket on the rear side of the inertial measurement unit.

[0010] Preferably, the camera body is fixedly mounted on the upper middle part of the fixed bracket by screws.

[0011] Preferably, a microcontroller is fixedly mounted on the upper center of the mounting plate, and the microcontroller is connected to a magnetic sensor, an inertial measurement unit, a gyroscope sensor and an accelerometer sensor via wires.

[0012] Preferably, the connecting plate has at least four sets of screw holes for connecting with the drone, the damping shock absorber ball has a hollow structure, and the damping shock absorber ball is filled with damping liquid.

[0013] Compared with the prior art, the advantages of this invention are as follows: This invention uses hollow damping shock absorbers filled with damping fluid, fixedly connected to the four corners of the bottom of the connecting plate, with the lower end fixedly connected to the mounting plate. During flight, high-frequency vibrations generated by the fuselage are transmitted to the connecting plate. The four corner damping shock absorbers absorb the vertical, lateral, and torsional vibrations through their internal damping fluid, dissipating the vibration energy within the damping fluid. This effectively blocks the transmission path of vibration from the connecting plate to the camera mechanism below, completing the first layer of passive damping. An inertial measurement unit, gyroscope sensor, accelerometer, and magnetometer are integrated at the bottom of the fixed bracket. During flight, the four types of sensors simultaneously collect multi-dimensional disturbance data such as the camera's pitch / roll / yaw three-axis angular velocity, attitude tilt changes, instantaneous acceleration jitter, and geomagnetic field deviation, and transmit this data in real time to the microcontroller on the mounting plate for fusion calculation. After calculating the current attitude offset of the camera based on the sensor data, the microcontroller outputs control signals to the first brushless motor in the first mounting slot and the second brushless motor in the second mounting slot, respectively. The first brushless motor drives the first rotating block to rotate around the vertical axis, causing the L-shaped second connecting arm to deflect as a whole, thus completing the reverse correction of the camera's yaw direction. The second brushless motor drives the second motor housing to rotate around the horizontal axis, causing the fixed bracket and camera body to complete the reverse angle correction of the pitch direction. The dual motors work together to achieve dual-axis active image stabilization compensation for yaw and pitch, combined with the passive isolation of high-frequency and roll vibrations by damping shock absorbers, forming a two-stage composite image stabilization system of "passive isolation + active compensation". Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the structure from another perspective of the present invention; Figure 3 This is an exploded view of the structure at the first and second connecting arms in this invention.

[0015] The numbers on the map are: 1. Connecting plate; 2. Screw holes; 3. Damping shock absorber ball; 4. Mounting plate; 5. First connecting arm; 6. First mounting slot; 7. First brushless motor; 8. First rotating block; 9. Second connecting arm; 10. Second motor housing; 11. Second mounting slot; 12. Second brushless motor; 13. Fixed bracket; 14. Magnetic sensor; 15. Inertial measurement unit; 16. Gyroscope sensor; 17. Camera body; 18. Microcontroller; 19. Accelerometer. Detailed Implementation

[0016] In the description of this invention, it should be noted that the terms "front", "up", "down", "left", "right", "vertical", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0017] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0018] Reference Figure 1 - Figure 3 As shown, a multi-dimensional vibration reduction and anti-shake mounting bracket for a drone camera includes a connecting plate 1. Damping shock absorbers 3 are fixedly connected to the four corners of the bottom of the connecting plate 1. A mounting plate 4 with a concave center is fixedly connected to the bottom of the four sets of damping shock absorbers 3. A first connecting arm 5 is fixedly connected to the rear bottom of the mounting plate 4. A first rotating block 8 is rotatably connected to the front bottom of the first connecting arm 5. An L-shaped second connecting arm 9 is fixedly connected to the right side of the first rotating block 8. A second motor housing 10 is fixedly connected to the front of the second connecting arm 9. A fixed bracket 13 is rotatably connected to the left side of the second motor housing 10. An inertial measurement unit 15 is fixedly installed at the center of the bottom of the fixed bracket 13. A gyroscope sensor 16 is fixedly installed at the right bottom of the fixed bracket 13. The damping shock absorbers 3 are positioned between the connecting plate 1 and the mounting plate 4, enabling vertical and multi-directional vibration buffering, reducing the transmission of drone flight vibrations to the downward camera structure, and achieving primary vibration reduction. The camera exhibits excellent image stabilization. A recessed mounting plate 4 supports the lower gimbal rotation structure, optimizing the structural layout and enhancing overall compactness. A first connecting arm 5 supports the first-stage rotation adjustment structure, providing structural support for pitch angle adjustment. A first rotating block 8 can rotate relative to the first connecting arm 5, enabling first-dimensional angle adjustment of the camera mechanism. An L-shaped second connecting arm 9 connects to the second-stage rotation structure, allowing for angle adjustment dimension switching and avoiding structural motion interference. A second motor housing 10 serves as the connecting base for second-dimensional rotation adjustment, working in conjunction with the corresponding power structure to achieve multi-angle attitude adjustment. A fixed bracket 13 serves as the supporting and fixing structure for the camera body 17, ensuring stable camera installation. An inertial measurement unit 15 is used to detect real-time attitude deviation and tilt change data of the camera bracket. A gyroscope sensor 16 is used to collect real-time angular velocity and attitude deflection data of the device, providing accurate data support for subsequent attitude correction and image stabilization compensation. Mechanical limiting structures are provided at the rotational connection points of the first connecting arm 5 and the first rotating block 8, and at the rotational connection points of the second motor housing 10 and the fixed bracket 13, to prevent motor overload or wire entanglement.

[0019] Reference Figure 3 As shown, a first mounting groove 6 is provided at the bottom of the first connecting arm 5. A first brushless motor 7 that drives the first rotating block 8 to rotate is fixedly installed inside the first mounting groove 6. The first mounting groove 6 provides an embedded installation space for the first brushless motor 7, effectively reducing the space occupied by the structure and improving the overall structure. As the power component for the first-dimensional attitude adjustment, the first brushless motor 7 can precisely drive the first rotating block 8 to rotate at an angle, realize the attitude fine adjustment of the camera yaw direction (yaw axis), and counteract the horizontal swaying disturbance of the drone's nose.

[0020] Reference Figure 3 As shown, a second mounting slot 11 is provided on the left side of the second motor housing 10. The second brushless motor 12, which drives the fixed bracket 13 to rotate, is fixedly installed inside the second mounting slot 11. The second mounting slot 11 provides a fixed mounting point for the second brushless motor 12, ensuring that the power component is installed firmly and preventing loosening. The second brushless motor 12 serves as the power source for the second-dimensional attitude adjustment. It can drive the fixed bracket 13 to rotate relative to the second motor housing 10, thereby realizing the adjustment of the camera's pitch direction (pitch axis) angle. Combined with the first-dimensional yaw adjustment, it completes dual-axis attitude correction and significantly improves the anti-shake adjustment range.

[0021] Reference Figure 2 As shown, a magnetic sensor 14 is fixedly installed at the bottom of the fixed bracket 13 on the left side of the inertial measurement unit 15, and an accelerometer 19 is fixedly installed at the bottom of the fixed bracket 13 on the rear side of the inertial measurement unit 15. The magnetic sensor 14 can detect changes in the ambient magnetic field and the orientation deviation of the bracket in real time, assisting in orientation calibration and improving shooting stability. The accelerometer 19 is used to collect the acceleration data of the bracket's motion, accurately capturing the attitude anomalies caused by the drone's flight turbulence and sudden vibrations, providing data support for instantaneous image stabilization compensation. The multi-sensor distributed collaborative detection is adopted to form a redundant architecture at the physical level, which can collect the bracket's attitude data from all directions. This design effectively resists the complex electromagnetic interference generated by the drone's motors, eliminates the detection data deviation of a single integrated module, and significantly improves the accuracy of image stabilization compensation under complex working conditions.

[0022] Reference Figure 1 As shown, the camera body 17 is fixedly installed on the upper middle part of the fixed bracket 13 by screws. The fixed bracket 13 provides a stable mounting surface for the camera body 17. The screw fixing method is convenient to install and remove and the connection is reliable. It can effectively prevent the camera body 17 from loosening or shifting due to flight vibration and ensure the installation stability of the shooting equipment.

[0023] Reference Figure 1As shown, a microcontroller 18 is fixedly installed in the middle of the upper part of the mounting plate 4. The microcontroller 18 is connected to the magnetic sensor 14, the inertial measurement unit 15, the gyroscope sensor 16 and the accelerometer sensor 19 through wires. As the core control unit of the device, the microcontroller 18 can receive attitude, vibration and orientation data collected by each sensor in real time, and perform calculation and analysis on the data. Based on the offset signal, it can precisely control two sets of brushless motors to perform reverse attitude compensation adjustment to counteract the image jitter caused by vibration and attitude offset, and realize intelligent anti-shake and multi-dimensional attitude correction functions. The selection of each sensor and data acquisition are common knowledge in the art, and the compensation algorithm based on the data is a conventional operation that can be understood by those in the art, and will not be described in detail here.

[0024] Reference Figure 1 As shown, the connecting plate 1 has at least four sets of screw holes 2 for connecting with the drone. The damping shock absorber ball 3 is a hollow structure and contains damping fluid. The screw holes 2 provide precise installation points for the assembly and connection between the connecting plate 1 and the drone body, enabling the bracket to be quickly disassembled and fixed, and the assembly is convenient and secure. The hollow damping shock absorber ball 3 with built-in damping fluid has excellent multi-directional damping and vibration absorption performance, which can continuously absorb and consume the high-frequency vibration and low-frequency shaking energy generated by the drone flight, and block the vibration from being transmitted to the camera end, thereby reducing the image shake problem from the source and improving the practicality and stability of the shock absorption and anti-shake system.

[0025] Working principle: The connecting plate 1 is aligned with the mounting points on the UAV fuselage through the multiple sets of screw holes 2 on top, and the connecting plate 1 is rigidly connected to the UAV by tightening screws; the lower ends of the four hollow damping shock-absorbing balls 3 with damping liquid at the bottom corners of the connecting plate 1 are fixed to the recessed mounting plate 4 in the middle, completing the first-stage shock-absorbing base assembly; the camera body 17 is fastened to the middle of the fixed bracket 13 with screws; when the UAV starts up, takes off, and cruises, the high-frequency vibrations brought by the fuselage motor and airflow are directly transmitted to the connecting plate 1; the damping liquid inside the four corner damping shock-absorbing balls 3 absorbs the vertical, horizontal, and torsional multi-dimensional vibration impacts, blocking the transmission of vibration from the connecting plate 1 to the mounting plate 4 and the camera mechanism below, completing the first layer of passive shock absorption, significantly reducing the original vibration amplitude, reducing the load of subsequent active image stabilization compensation, and throughout the flight, multiple sensors at the bottom of the fixed bracket 13 synchronously and continuously collect disturbance signals and monitor them in real time. The data is transmitted to the microcontroller 18: gyroscope sensor 16 collects the angular velocity disturbances of the camera's pitch, roll, and yaw axes; inertial measurement unit 15 synchronously collects attitude tilt angle changes; accelerometer 19 captures instantaneous acceleration jitter caused by airflow impact; magnetometer 14 collects the geomagnetic field offset to assist in correcting the UAV's heading and attitude errors; the microcontroller 18 summarizes all sensor data in real time, calculates the camera's current offset angle and compensation reverse rotation angle, and outputs control signals to the first brushless motor 7 and the second brushless motor 12 based on the calculation; the first brushless motor 7 drives the first rotating block 8 to rotate, causing the L-shaped second connecting arm 9 to deflect as a whole, completing the reverse correction of the camera's yaw dimension (Yaw axis); at the same time, the second brushless motor 12 drives the fixed bracket 13 and the camera body 17 to rotate, completing the reverse angle correction of the pitch dimension (Pitch axis). The dual motors work together to achieve synchronous active attitude adjustment on both axes, while high-frequency fine jitters such as roll (Roll axis) generated during flight are passively absorbed by the damping shock absorption ball 3. Working in tandem, the camera body 17 maintains a stable aerial shooting baseline, outputting clear, shake-free aerial images. Specifically, during continuous drone cruise aerial shooting, the body vibration is passively buffered by the damping shock absorption ball 3, multiple sensors simultaneously collect shake attitude data, the microcontroller 18 calculates compensation amounts in real time, and the first brushless motor 7 and the second brushless motor 12 adjust their attitude in a two-dimensional synchronous reverse direction. The camera body 17 maintains a stable horizontal aerial shooting baseline, completely offsetting the dual disturbances of airflow and motors, outputting clear, shake-free aerial images. Ground operators issue aerial shooting angle adjustment commands, which are transmitted to the microcontroller 18. The microcontroller 18 controls the first brushless motor 7 and the second brushless motor 12 to drive the first rotating block 8 and the second motor housing 10 to deflect at a specified angle, freely switching the camera's pitch, left, right, and surround shooting angles to adapt to different aerial shooting framing needs. The anti-shake compensation is activated simultaneously during the adjustment process, preventing image shake caused by the rotation of the viewing angle.

[0026] The output shafts of the first brushless motor 7 and the second brushless motor 12 can adopt a D-type shaft structure or be equipped with a flat key, which can be interference-fitted with the connecting holes of the first rotating block 8 and the fixed bracket 13 or locked by a set screw to prevent mechanical slippage when the motor performs anti-shake compensation in frequent forward and reverse rotation.

[0027] All electrical components mentioned in this article are electrically connected to the drone's own DC power supply (such as a lithium battery pack) or an independent external DC power supply. The control circuit can be easily programmed by those skilled in the art using a conventional microcontroller (MCU) and motor drive module to achieve closed-loop PID control. To ensure equipment compatibility, the operating methods used are consistent with the parameters of commercially available aerial photography equipment. This invention primarily protects the mechanical image stabilization structure and the collaborative system of multi-source sensors; therefore, the underlying control code and specific circuit wiring will not be explained in detail.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A multi-dimensional shock absorption and image stabilization mounting bracket for a drone camera, characterized in that: The system includes a connecting plate (1), with damping shock absorbers (3) fixedly connected to the four corners of the bottom of the connecting plate (1). The bottom of each of the four sets of damping shock absorbers (3) is fixedly connected to a mounting plate (4) with a concave center. A microcontroller (18) is fixedly mounted on the top of the mounting plate (4), and a first connecting arm (5) is fixedly connected to its rear bottom. A first brushless motor (7) is mounted on the first connecting arm (5), and the output end of the first brushless motor (7) is connected to a first rotating block (8) to drive the first rotating block (8) to rotate. A second connecting arm (9) in an L-shape is fixedly connected to the right side of the first rotating block (8), and the front side of the second connecting arm (9) is fixedly connected to... A second motor housing (10) is connected to the second motor housing (10), and a second brushless motor (12) is installed on the second motor housing (10). The output end of the second brushless motor (12) is rotatably connected to a fixed bracket (13) to drive the fixed bracket (13) to rotate. An inertial measurement unit (15) and a gyroscope sensor (16) for detecting attitude changes are fixedly installed on the fixed bracket (13). The microcontroller (18) is electrically connected to the inertial measurement unit (15), the gyroscope sensor (16), the first brushless motor (7), and the second brushless motor (12) respectively, and is used to control the two sets of brushless motors to perform active anti-shake compensation according to the received attitude change data.

2. The multi-dimensional shock absorption and image stabilization mounting bracket for a drone camera according to claim 1, characterized in that: The first connecting arm (5) has a first mounting groove (6) at its bottom, and the first brushless motor (7) is embedded and fixedly installed inside the first mounting groove (6).

3. The multi-dimensional shock-absorbing anti-shake mounting bracket for the camera of the UAV according to claim 1, characterized in that: The second motor housing (10) has a second mounting groove (11) on the left side, and the second brushless motor (12) is embedded and fixedly installed inside the second mounting groove (11).

4. The multi-dimensional shock-absorbing anti-shake mounting bracket for the camera of the UAV according to claim 1, characterized in that: A magnetic sensor (14) is fixedly installed on the bottom of the fixed bracket (13) on the left side of the inertial measurement unit (15), and an acceleration sensor (19) is fixedly installed on the bottom of the fixed bracket (13) on the rear side of the inertial measurement unit (15). Both the magnetic sensor (14) and the acceleration sensor (19) are electrically connected to the microcontroller (18).

5. The multi-dimensional shock-absorbing anti-shake mounting bracket for the camera of the UAV according to claim 1, characterized in that: The camera body (17) is fixedly mounted on the upper part of the middle of the fixed bracket (13) by screws.

6. The multi-dimensional shock absorption and image stabilization mounting bracket for a drone camera according to claim 1, characterized in that: The output shafts of the first brushless motor (7) and the second brushless motor (12) are both D-shaped shafts or have flat keys, and are respectively interference-fitted with the connecting holes of the first rotating block (8) and the fixed bracket (13) or locked by set screws.

7. The multi-dimensional shock absorption and image stabilization mounting bracket for a drone camera according to claim 1, characterized in that: The connecting plate (1) has at least four sets of screw holes (2) for connecting with the drone. The damping ball (3) is a hollow structure and is filled with damping liquid.

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