Photoelectric pod three-axis stabilized platform with passive damping

Abstract

The invention relates to a photoelectric pod three-axis stabilized platform with passive damping, which is matched with a photoelectric pod for use and comprises a stabilized platform fixing shaft, a stabilized platform pitching frame, a stabilized platform azimuth frame, a stabilized platform rolling frame, a damping device, a voice coil motor and a photoelectric sensor, the photoelectric pod is provided with a pod outer shell and a shock absorber located on the inner side wall of the pod outer shell, the two ends of the stabilized platform fixing shaft extend in the horizontal direction and are fixedly connected with the shock absorber through adapter parts, the stabilized platform fixing shaft is sleeved with the stabilized platform pitching frame, and the stabilized platform pitching frame is fixedly connected with the shock absorber through adapter parts. The damping device is fixed on the outer side wall of the roll frame of the stabilized platform, the voice coil motor is fixed in the pod outer shell, and the photoelectric sensor is fixed on the outer side wall of the roll frame of the stabilized platform, so that the problem of image roll rotation of the two-axis photoelectric pod can be effectively solved, and the vibration and impact resistance of the stabilized platform is enhanced; and the image stability performance of the photoelectric pod is effectively improved.

Description

Technical Field

[0001] The invention belongs to the technical field of airborne optoelectronic pod equipment, and in particular relates to an optoelectronic pod three-axis stable platform with passive damping. Background Art

[0002] An airborne optoelectronic pod is an optoelectronic device installed on an unmanned aerial vehicle, helicopter or fixed-wing aircraft for observation, search and mapping. The stabilization platform is the core component of the optoelectronic pod, which is used to carry core measurement components such as optoelectronic sensors and gyroscopes. Therefore, the performance of the stabilization platform directly affects the overall performance of the optoelectronic pod and the detection and identification performance of the optoelectronic pod. However, the existing optoelectronic pod stabilization platform generally adopts two axes, which can easily cause the optoelectronic pod video on equipment such as unmanned aerial vehicles to rotate in the roll direction, affecting the stability of the optoelectronic pod display image, and thus the final operator's viewing. Therefore, there is an urgent need for an optoelectronic pod three-axis stabilization platform with passive damping to solve the above problems. Summary of the invention

[0003] The present invention provides an optoelectronic pod three-axis stabilization platform with passive damping, which solves the technical problem that the existing stabilization platform cannot suppress the vibration of the optoelectronic pod image in the rolling direction, thereby effectively reducing the jitter of the optoelectronic pod image, improving the stabilization accuracy of the optoelectronic pod as a whole, and improving the image stabilization performance of the optoelectronic pod.

[0004] In order to achieve the above technical objectives, the specific technical solutions adopted by the present invention are:

[0005] The invention discloses a three-axis stabilization platform of an optoelectronic pod with passive damping, which is used in conjunction with an optoelectronic pod and comprises a stabilization platform fixed axis, a stabilization platform pitch frame, a stabilization platform azimuth frame, a stabilization platform roll frame, a damping device, a voice coil motor and a photoelectric sensor. The optoelectronic pod is provided with a pod outer shell and a shock absorber located on the inner side wall of the pod outer shell. The two ends of the stabilization platform fixed axis extend in the horizontal direction and are fixedly connected to the shock absorber through a switching part. The stabilization platform pitch frame is sleeved on the stabilization platform fixed axis and is connected to the stabilization platform fixed axis through a rolling axis. The stabilization platform azimuth frame is arranged between two stabilization platform pitch frames. The stabilization platform azimuth frame is fixed to the stabilization platform pitch frame through a rolling bearing. The stabilization platform pitch frame and the stabilization platform azimuth frame are both located inside the stabilization platform roll frame. The damping device is fixed to the outer side wall of the stabilization platform roll frame. The voice coil motor is fixed inside the pod outer shell. The photoelectric sensor is fixed to the outer side wall of the stabilization platform roll frame.

[0006] Furthermore, the damping device includes a damping outer shell, a damping vibration isolation rubber and a damping inner shaft, both of which are located inside the damping outer shell. The damping outer shell is fixed to the stable platform roll frame by screws, and the damping device inner shaft is connected to the stable platform azimuth frame by screws.

[0007] Furthermore, the voice coil motor includes a motor stator and a motor rotor, the motor stator is fixed on the outer shell of the pod, and the motor rotor is fixed on the rolling frame of the stable platform through a switching part.

[0008] Furthermore, the photoelectric sensor includes a television sensor, an infrared sensor and a laser sensor. The television sensor is fixedly connected to the upper part of the stable platform rolling frame, and the infrared sensor and the laser sensor are fixedly connected to the lower part of the stable platform rolling frame through a horizontal connecting plate arranged below the stable platform rolling frame.

[0009] Furthermore, the motor stator includes a U-shaped frame and magnetic steel heads located at both ends of the U-shaped frame. The motor stator is connected to the pod outer shell through the U-shaped frame. Both ends of the motor rotor extend between the two magnetic steel heads on the same side, thereby rotating under the restriction of the motor stator.

[0010] Furthermore, the azimuth frame of the stable platform is sleeved on the pitch frame of the stable platform, the roll frame of the stable platform is sleeved on the azimuth frame of the stable platform, and the pitch frame of the stable platform is laterally distributed inside the roll frame of the stable platform along the left-right direction.

[0011] The principle of the present invention is to use the optoelectronic pod as a task execution device, and the stable platform is its core component, so as to carry a variety of sensors, gyroscopes, and positioning modules. The design of the stable platform directly determines the overall performance of the optoelectronic pod. The optoelectronic pod stable platform structure with passive damping can effectively solve the image rolling problem of the two-axis optoelectronic pod. At the same time, the damping axis system effectively isolates part of the airborne impact vibration, effectively improves the stability performance of the optoelectronic pod stable platform and the image stabilization accuracy of the optoelectronic pod, and can be widely used in various types of optoelectronic pods.

[0012] By adopting the above technical solution, the present invention can also bring the following beneficial effects:

[0013] 1. The present invention provides an optoelectronic pod three-axis stabilization platform with passive damping, which improves the stabilization effect of the optoelectronic pod on the roll axis system. The system increases the degree of freedom of the roll axis system, and can effectively offset the deflection of the image in the roll direction when the optoelectronic pod rolls, thereby increasing the stability of the system image.

[0014] 2. The present invention mentions an optoelectronic pod three-axis stable platform with passive damping. A damping device is adopted to optimize the passive vibration isolation and impact resistance of the stable platform. The damping device is provided with a rubber damping module, which can effectively absorb the vibration impact of the platform and effectively improve the vibration isolation and impact resistance of the stable platform. By setting three directional axis systems, the three axis systems are orthogonal to each other, the module is compact, and the volume occupies a small volume, which effectively improves the space utilization of the stable platform. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a structural schematic diagram of a three-axis stable platform of an optoelectronic pod with passive damping of the present invention;

[0017] Figure 2 Schematic diagram of the positional relationship between the motor stator and the motor rotor inside the voice coil motor in this embodiment;

[0018] Figure 3 is a schematic diagram of the connection structure between the pitch frame of the stabilizing platform and the fixed axis of the stabilizing platform in this embodiment;

[0019] Figure 4 is a schematic structural diagram of the damping device in this embodiment;

[0020] Among them: 1. pod outer shell; 2. motor stator; 3. photoelectric sensor; 4. stable platform shaft system; 5. shock absorber; 6. motor rotor; 7. stable platform fixed shaft; 8. stable platform pitch frame; 9. stable platform roll frame; 10. damping device; 11. stable platform azimuth frame; 12. damping outer shell; 13. damping vibration isolation rubber; 14. damping inner shaft. DETAILED DESCRIPTION

[0021] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0022] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0023] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on the present invention, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects described herein can be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this device and / or practice this method.

[0024] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention. The drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0025] Additionally, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the aspects described may be practiced without these specific details.

[0026] Example 1

[0027] In one embodiment of the present invention, see Figures 1 to 4A three-axis stable platform for an optoelectronic pod with passive damping is used in conjunction with an optoelectronic pod, comprising a stable platform fixed axis 7, a stable platform pitch frame 8, a stable platform azimuth frame 11, a stable platform roll frame 9, a damping device 10, a voice coil motor and a photoelectric sensor 3. The optoelectronic pod is provided with a pod outer shell 1 and a shock absorber 5 located on the inner side wall of the pod outer shell 1. Both ends of the stable platform fixed axis 7 extend in the horizontal direction and are fixedly connected to the shock absorber 5 through a transfer part. The stable platform pitch frame 8 is sleeved on the stable platform fixed axis 7. The stable platform azimuth frame 11 is arranged between the two stable platform pitch frames 8, and the stable platform azimuth frame 11 is fixed on the stable platform pitch frame 8 through a rolling bearing. The stable platform pitch frame 8 and the stable platform azimuth frame 11 are both located inside the stable platform roll frame 9, the damping device 10 is fixed on the outer wall of the stable platform roll frame 9, the voice coil motor is fixed inside the pod outer shell 1, and the photoelectric sensor 3 is fixed on the outer wall of the stable platform roll frame 9.

[0028] The stabilizing platform azimuth frame 11 is sleeved on the stabilizing platform pitch frame 8 , the stabilizing platform roll frame 9 is sleeved on the stabilizing platform azimuth frame 11 , and the stabilizing platform pitch frame 8 is laterally distributed inside the stabilizing platform roll frame 9 along the left-right direction.

[0029] The damping device 10 includes a damping outer shell 12, a damping vibration isolation rubber 13 and a damping inner shaft 14. The damping vibration isolation rubber 13 and the damping inner shaft 14 are both located inside the damping outer shell 12. The damping outer shell 12 is fixed to the stable platform roll frame 9 by screws, and the inner shaft of the damping device 10 is connected to the stable platform azimuth frame 11 by screws.

[0030] The voice coil motor includes a motor stator 2 and a motor rotor 6. The motor stator 2 is fixed to the pod outer shell 1, and the motor rotor 6 is fixed to the stable platform roll frame 9 through a switching part.

[0031] The motor stator 2 includes a U-shaped frame and magnetic steel heads located at both ends of the U-shaped frame. The motor stator 2 is connected to the nacelle outer shell 1 through the U-shaped frame. Both ends of the motor rotor 6 extend between the two magnetic steel heads on the same side, thereby rotating under the restriction of the motor stator 2.

[0032] The photoelectric sensor 3 includes a television sensor, an infrared sensor and a laser sensor. The television sensor is fixedly connected to the upper part of the stable platform rolling frame 9, and the infrared sensor and the laser sensor are fixedly connected to the lower part of the stable platform rolling frame 9 through a horizontal connecting plate arranged below the stable platform rolling frame 9.

[0033] The motor rotor 6 moves through the electromagnetic action of the motor stator 2. The movement of the motor rotor 6 drives the movement of the stable platform shaft system 4, and then drives the movement of the photoelectric sensor 3 to achieve observation and detection of the target. The damping device 10 passively reduces the vibration intensity of the system during the movement of the stable platform and increases the stability of the system.

[0034] In conclusion, the present invention can effectively solve the image rolling problem of the two-axis optoelectronic pod, enhance the anti-vibration and impact performance of the stabilizing platform, and effectively improve the image stabilization performance of the optoelectronic pod.

[0035] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A three-axis stable platform of an optoelectronic pod with passive damping, used in conjunction with an optoelectronic pod, characterized in that: The invention comprises a stabilizing platform fixed shaft (7), a stabilizing platform pitch frame (8), a stabilizing platform azimuth frame (11), a stabilizing platform roll frame (9), a damping device (10), a voice coil motor and a photoelectric sensor (3); the photoelectric pod is provided with a pod outer shell (1) and a shock absorber (5) located on the inner side wall of the pod outer shell (1); the two ends of the stabilizing platform fixed shaft (7) extend in the horizontal direction and are fixedly connected to the shock absorber (5) through a transition part; the stabilizing platform pitch frame (8) is sleeved on the stabilizing platform fixed shaft (7) and is connected to the stabilizing platform fixed shaft through a roll shaft. (7) connected, the stabilizing platform azimuth frame (11) is arranged between the two stabilizing platform pitch frames (8), the stabilizing platform azimuth frame (11) is fixed on the stabilizing platform pitch frame (8) through a rolling bearing, the stabilizing platform pitch frame (8) and the stabilizing platform azimuth frame (11) are both located inside the stabilizing platform roll frame (9), the damping device (10) is fixed on the outer wall of the stabilizing platform roll frame (9), the voice coil motor is fixed inside the pod outer shell (1), and the photoelectric sensor (3) is fixed on the outer wall of the stabilizing platform roll frame (9).

2. The optoelectronic pod three-axis stable platform with passive damping as claimed in claim 1, characterized in that: The damping device (10) comprises a damping outer shell (12), a damping vibration isolation rubber (13) and a damping inner shaft (14); the damping vibration isolation rubber (13) and the damping inner shaft (14) are both located inside the damping outer shell (12); the damping outer shell (12) is fixed to the stable platform rolling frame (9) by screws; and the inner shaft of the damping device (10) is connected to the stable platform azimuth frame (11) by screws.

3. The optoelectronic pod three-axis stable platform with passive damping as claimed in claim 2, characterized in that: The voice coil motor comprises a motor stator (2) and a motor rotor (6); the motor stator (2) is fixed on the pod outer shell (1), and the motor rotor (6) is fixed on the stable platform rolling frame (9) via a switching part.

4. The optoelectronic pod three-axis stable platform with passive damping as claimed in claim 3, characterized in that: The photoelectric sensor (3) comprises a television sensor, an infrared sensor and a laser sensor; the television sensor is fixedly connected to the upper portion of the stable platform rolling frame (9); the infrared sensor and the laser sensor are fixedly connected to the lower portion of the stable platform rolling frame (9) via a horizontal connecting plate arranged below the stable platform rolling frame (9).

5. The optoelectronic pod three-axis stable platform with passive damping as claimed in claim 4, characterized in that: The motor stator (2) comprises a U-shaped frame and magnetic steel heads located at both ends of the U-shaped frame. The motor stator (2) is connected to the pod outer shell (1) via the U-shaped frame. The two ends of the motor rotor (6) extend respectively between the two magnetic steel heads on the same side, thereby rotating under the restriction of the motor stator (2).

6. The optoelectronic pod three-axis stable platform with passive damping as claimed in claim 5, characterized in that: The stabilizing platform azimuth frame (11) is sleeved on the stabilizing platform pitch frame (8), the stabilizing platform roll frame (9) is sleeved on the stabilizing platform azimuth frame (11), and the stabilizing platform pitch frame (8) is laterally distributed inside the stabilizing platform roll frame (9) along the left-right direction.

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