Visual axis jitter suppression device for photoelectric equipment

Abstract

The embodiment of the invention provides a visual axis jitter suppression device for photoelectric equipment. The device comprises a base 1; the bottom of the mass block 2 is connected with the left sliding block 5 and the right sliding block 5; the sliding block 5 and the guide rail 6 form a linear motion pair so as to ensure that the mass block 2 can only do linear reciprocating motion along the direction of the guide rail 6; the end part of the mass block 2 is connected with the shock absorber 4 through the connecting rod 3; the shock absorber 4 is fixed on the rear cover 8; an upper cover 7, a rear cover 8 and a threaded cover 9 are arranged, the rear cover 8 is provided with a fabrication hole, and the threaded cover 9 is adopted for sealing; and the fixed bracket 10 is used for fixedly connecting the photoelectric equipment 11. The visual axis jitter suppression device is conformal with the photoelectric equipment through parameter design in a limited space; according to the visual axis jitter suppression device, the visual axis jitter of the photoelectric equipment can be suppressed by designing the inherent frequency of a mass block-shock absorber system to be equal to the shafting modal frequency.

Description

Technical Field

[0001] The present application relates to the technical field of optical axis stability, and in particular to a device for suppressing optical axis jitter of optoelectronic equipment, which is suitable for suppressing optical axis jitter of optoelectronic equipment on airborne, vehicle-mounted, ship-mounted and other platforms. Background Art

[0002] For search and tracking optoelectronic equipment, line of sight stability is one of the important performance indicators to ensure clear imaging. The mechanical vibration of the carrier platform of the optoelectronic equipment will excite the mode of the axis system, causing the deformation of the optomechanical structure, thus causing the optical axis to shake. Especially for optoelectronic equipment using the Kude optical path, since the azimuth axis system is a cantilever beam structure, the stiffness of the azimuth axis system cannot reach a high value, and the optical axis shakes during the movement of the carrier platform, resulting in unclear imaging.

[0003] At present, the main methods to improve the stiffness of the Kude optical path shaft system are to use large bearings or shaft system materials with high specific stiffness, increase the stiffness of the bearings or shaft system structural parts, thereby increasing the stiffness of the shaft system. However, the use of large bearings will greatly increase the weight of the optoelectronic equipment and cannot meet the requirements of lightweight optoelectronic equipment. The use of shaft system materials with high specific stiffness will only increase the stiffness of the shaft system to a limited extent and will greatly increase the cost, which is not conducive to mass production of products.

[0004] Since the optoelectronic equipment adopts Kude optical path, its azimuth axis system is a cantilever beam structure, so the stiffness of the azimuth axis system cannot reach a high value. During the movement of the carrier platform, the mechanical vibration generated by the carrier platform excites the low-order modes of the axis system, causing the deformation of the optomechanical structure and the optical axis jitter, resulting in unclear imaging. Summary of the invention

[0005] In order to reduce or suppress the optical axis jitter of the optoelectronic device during the movement of the carrier platform, the embodiment of the present invention fully considers the spatial layout and appearance characteristics of the optoelectronic device, and designs a visual axis jitter suppression device that conforms to the optoelectronic device. The working principle and installation method of the visual axis jitter suppression device are given.

[0006] The present invention provides a device for suppressing visual axis jitter of an optoelectronic device, comprising:

[0007] Base 1;

[0008] A mass block 2, wherein the bottom of the mass block 2 is connected to four left and right sliders 5;

[0009] The guide rail 6, the slider 5 and the guide rail 6 form a linear motion pair to ensure that the mass block 2 can only perform linear reciprocating motion along the direction of the guide rail 6;

[0010] A connecting rod 3, through which the end of the mass block 2 is connected to the shock absorber 4;

[0011] The shock absorber 4 is fixed on the rear cover 8;

[0012] An upper cover 7, a rear cover 8 and a threaded cover 9, wherein a process hole is designed at the rear cover 8 and the threaded cover 9 is used for sealing;

[0013] The fixing bracket 10 is used for fixing and connecting the optoelectronic device 11 .

[0014] In some embodiments, the linear motion pair between the slider 5 and the guide rail 6 includes balls or rollers to reduce friction and improve motion accuracy.

[0015] In some embodiments, the connecting rod 3 has an adjustable length to accommodate the mass block 2 and the shock absorber 4 of different sizes.

[0016] In some embodiments, the shock absorber 4 is a hydraulic shock absorber or a pneumatic shock absorber to provide adjustable damping characteristics.

[0017] In some embodiments, the shock absorber 4 includes a built-in sensor for monitoring the working status of the shock absorber and providing feedback.

[0018] In some embodiments, the fixing bracket 10 includes a plurality of adjustment holes to allow the optoelectronic device 11 to be fixed at different positions.

[0019] In some embodiments, the upper cover 7 and the rear cover 8 are made of lightweight and high-strength materials to reduce the overall weight and improve structural stability.

[0020] In some embodiments, the threaded cover 9 includes a sealing ring to provide sealing performance.

[0021] The beneficial effects of the above embodiments include:

[0022] The line-of-sight jitter suppression device is designed to be conformal with the optoelectronic device in a limited space through parameter design; the line-of-sight jitter suppression device can suppress the line-of-sight jitter of the optoelectronic device by designing the natural frequency of the mass block-shock absorber system to be equal to the modal frequency of the shaft system. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings illustrate generally, by way of example and not limitation, various embodiments discussed herein.

[0024] Figure 1 is a cross-sectional view of a visual axis jitter suppression device according to an embodiment of the present invention;

[0025] Figure 2 A diagram of a visual axis jitter suppression device according to an embodiment of the present invention;

[0026] Figure 3This is an installation diagram of a visual axis jitter suppression device according to an embodiment of the present invention.

[0027] Explanation of symbols:

[0028] 1-base; 2-mass block; 3-connecting rod; 4-shock absorber; 5-slider; 6-guide rail; 7-upper cover; 8-rear cover; 9-threaded cover; 10-fixed bracket; 11-photoelectric device. DETAILED DESCRIPTION

[0029] In order to enable a more detailed understanding of the features and technical contents of the embodiments of the present application, the implementation of the embodiments of the present application is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present application.

[0030] In the embodiments of the present application, it should be noted that, unless otherwise specified and limited, the term "connection" should be understood in a broad sense. For example, it can be an electrical connection or a connection between two components. It can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances.

[0031] It should be noted that the terms "first\second\third" involved in the embodiments of the present application are only used to distinguish similar objects, and do not represent a specific order for the objects. It is understandable that the specific order or sequence of "first\second\third" can be interchanged where permitted. It should be understood that the objects distinguished by "first\second\third" can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0032] The embodiment of the present invention provides a device for suppressing visual axis jitter of an optoelectronic device, such as Figures 1 to 3 As shown, the device includes a base 1, a mass block 2, a slider 5, a guide rail 6, a connecting rod 3, a shock absorber 4, an upper cover 7, a rear cover 8, a threaded cover 9, a fixed bracket 10, etc. The bottom of the mass block is connected to four left and right sliders, and the sliders and the guide rails on both sides form a linear motion pair to ensure that the mass block can only perform linear reciprocating motion along the guide rail under the action of external force. The end of the mass block is connected to the shock absorber through a connecting rod. The shock absorber is fixed on the rear cover. In order to facilitate the assembly of the shock absorber and the connecting rod, a process hole is designed at the rear cover position and sealed with a threaded cover. The shock absorber forms a single-degree-of-freedom spring oscillator through the connecting rod and the mass block, and the natural frequency of the spring oscillator is designed to be equal to the modal frequency of the optoelectronic device shaft system. When the optoelectronic device 11 is excited in the front-to-back direction of the carrier platform, the shaft system mode is excited. Since the natural frequency of the mass block-shock absorber system is equal to the shaft system modal frequency, most of the vibration energy of the shaft system will be transferred to the mass block-shock absorber system and dissipated by the damping of the shock absorber. The deformation of the corresponding mode of the shaft system is reduced, and the jitter of the visual axis is suppressed.

[0033] The embodiment of the present invention provides a device for suppressing visual axis jitter of an optoelectronic device, such as Figures 1 to 3 As shown, the device comprises:

[0034] Base 1.

[0035] The mass block 2 has a bottom connected to four left and right sliding blocks 5.

[0036] The guide rail 6 , the slider 5 and the guide rail 6 form a linear motion pair to ensure that the mass block 2 can only perform linear reciprocating motion along the direction of the guide rail 6 .

[0037] Connecting rod 3, the end of mass block 2 is connected to shock absorber 4 through connecting rod 3.

[0038] The shock absorber 4 is fixed on the rear cover 8.

[0039] The upper cover 7, the rear cover 8 and the threaded cover 9. The rear cover 8 is designed with a process hole and is sealed with the threaded cover 9.

[0040] The fixing bracket 10 is used for fixing and connecting the optoelectronic device 11 .

[0041] In some embodiments, the linear motion pair between the slider 5 and the guide rail 6 includes balls or rollers to reduce friction and improve motion accuracy.

[0042] In some embodiments, the connecting rod 3 has an adjustable length to accommodate masses 2 and shock absorbers 4 of different sizes.

[0043] In some embodiments, the shock absorber 4 is a hydraulic shock absorber or a pneumatic shock absorber to provide adjustable damping characteristics.

[0044] In some embodiments, the shock absorber 4 includes a built-in sensor for monitoring the operating status of the shock absorber and providing feedback.

[0045] In some embodiments, the fixing bracket 10 includes a plurality of adjustment holes to allow the optoelectronic device 11 to be fixed at different positions.

[0046] In some embodiments, the upper cover 7 and the rear cover 8 are made of lightweight and high-strength materials to reduce the overall weight and improve structural stability.

[0047] In some embodiments, the threaded cap 9 includes a sealing ring to provide sealing performance.

[0048] The optical axis jitter suppression device of the optoelectronic device in the above-mentioned embodiment is conformal to the optoelectronic device through parameter design within a limited space; the optical axis jitter suppression device can suppress the optical axis jitter of the optoelectronic device by designing the natural frequency of the mass block-shock absorber system to be equal to the modal frequency of the axis system.

[0049] The technical solutions described in the embodiments of the present application can be combined arbitrarily without conflict.

[0050] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A device for suppressing visual axis jitter of an optoelectronic device, characterized in that: include: Base (1); A mass block (2), wherein the bottom of the mass block (2) is connected to four left and right sliding blocks (5); A guide rail (6), wherein the slider (5) and the guide rail (6) form a linear motion pair to ensure that the mass block (2) can only perform linear reciprocating motion along the direction of the guide rail (6); A connecting rod (3), wherein the end of the mass block (2) is connected to the shock absorber (4) via the connecting rod (3); The shock absorber (4) is fixed on the rear cover (8); An upper cover (7), the rear cover (8) and a threaded cover (9), wherein a process hole is designed at the rear cover (8) and the threaded cover (9) is used for sealing; The fixing bracket (10) is used for fixing and connecting the optoelectronic device (11).

2. The optical axis jitter suppression device of the optoelectronic device according to claim 1, characterized in that: The linear motion pair between the slider (5) and the guide rail (6) includes balls or rollers to reduce friction and improve motion accuracy.

3. The device for suppressing visual axis jitter of optoelectronic equipment according to claim 2, characterized in that: The connecting rod (3) has an adjustable length to accommodate the mass blocks (2) and the shock absorbers (4) of different sizes.

4. The device for suppressing visual axis jitter of an optoelectronic device according to any one of claims 1 to 3, characterized in that: The shock absorber (4) is a hydraulic shock absorber or a pneumatic shock absorber to provide adjustable damping characteristics.

5. The device for suppressing visual axis jitter of optoelectronic equipment according to claim 4, characterized in that: The shock absorber (4) includes a built-in sensor for monitoring the operating status of the shock absorber and providing feedback.

6. The device for suppressing visual axis jitter of optoelectronic equipment according to claim 1, characterized in that: The fixing bracket (10) comprises a plurality of adjustment holes to allow the optoelectronic device (11) to be fixed at different positions.

7. The device for suppressing visual axis jitter of optoelectronic equipment according to claim 1, characterized in that: The upper cover (7) and the rear cover (8) are made of lightweight and high-strength materials to reduce the overall weight and improve structural stability.

8. The device for suppressing visual axis jitter of optoelectronic equipment according to claim 1, characterized in that: The threaded cover (9) comprises a sealing ring to provide sealing performance.

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