Optical remote sensing camera unlocking support directional damping structure

Abstract

The unlocking support directional buffer structure of an optical remote sensing camera disclosed in the application belongs to the technical field of optical remote sensing, and aims to solve the problem of large impact force transmitted to a satellite and an optical remote sensing camera during unlocking of a support. The application comprises: a support protective cover; a pyrotechnic device located in the support protective cover, the head of the upper end of the pyrotechnic device being smaller in size than the lower end; and a pyrotechnic device locking seat connected through threads at the lower end of the pyrotechnic device; a buffer limiting combination arranged at the upper end of the support protective cover, the inner ring surface of the buffer limiting combination being provided with a buffer limiting tongue, the free end of the buffer tongue away from the buffer limiting body being a flexible structure; a buffer disc arranged at the upper end of the buffer limiting combination through a buffer seat, the inner diameter of the buffer disc being larger than the size of the head of the upper end of the pyrotechnic device and smaller than the size of the lower end, the pyrotechnic device after explosion being guided, buffered, limited and locked through the buffer limiting combination and the buffer disc; and a support cover located at the upper end of the buffer seat.

Description

Technical Field

[0001] This invention belongs to the field of optical remote sensing technology, specifically relating to an directional buffer structure for an unlocking support of an optical remote sensing camera. Background Technology

[0002] Space optical remote sensing cameras are an important tool for humankind to understand the Earth and explore the universe. With the development of human understanding, higher demands are being placed on the imaging quality of these cameras. To obtain clear, high-resolution images, space optical remote sensing cameras need not only excellent optical design and a stable optomechanical structure, but more importantly, they must isolate the satellite from multi-source disturbances after entering orbit. This requires designing an unlocking mount between the satellite and the space optical remote sensing camera, which can be unlocked after orbit insertion to block the transmission path of disturbances.

[0003] The most common and reliable method for unlocking the support is pyrotechnic unlocking. However, with the increasing demands for high-quality imaging in space optical remote sensing cameras, camera apertures and weights are constantly increasing. To ensure a high-strength and high-rigidity connection for the launch section support, large-sized pyrotechnic devices are required. This results in a significant impact during the unlocking process, posing a risk of damage to components and parts on the space optical remote sensing camera and satellite. To ensure the safety of the camera and satellite components, it is necessary to reduce the impact during the unlocking process. Currently, there is no research on mitigating the impact of unlocking supports for space optical remote sensing cameras. Summary of the Invention

[0004] The purpose of this invention is to propose an directional buffer structure for unlocking an optical remote sensing camera, which solves the problem of large impact forces transmitted to the satellite and optical remote sensing camera during the unlocking process of the existing technology.

[0005] To achieve the above objectives, the present invention provides an optical remote sensing camera unlocking support directional buffer structure comprising: Support protective cover; The pyrotechnic device located inside the support protective cover has a head size smaller than its lower size at the upper end. A locking seat for pyrotechnic devices that is threadedly connected to the lower end of the pyrotechnic device; A buffer limiting assembly is installed at the upper end of the support protective cover. A buffer limiting tongue is provided on the inner ring surface of the buffer limiting assembly. The free end of the buffer limiting tongue is a flexible structure. A buffer seat is installed at the upper end of the buffer limit assembly; The buffer disc located in the buffer seat has an inner diameter larger than the head size of the pyrotechnic item and smaller than the lower size. The buffer limiting assembly and the buffer disc guide, buffer, limit and lock the pyrotechnic item after the explosion. And a support cover located at the upper end of the buffer seat, which presses the buffer seat and the buffer limiting assembly onto the support protective cover.

[0006] The buffer disc includes multiple staggered unloading slots that extend from the inner annular surface of the buffer disc to the outer annular surface.

[0007] The outer surface of the buffer disc has multiple protrusions evenly distributed around its circumference, and the outer ring surface of the protrusions is larger than the inner ring surface of the support cover.

[0008] The inner surface structure of the buffer seat corresponds to the outer envelope structure and size of the buffer disc.

[0009] The buffer limiting assembly includes multiple buffer limiting bodies arranged coaxially, and multiple buffer limiting tongues are arranged on the inner annular surface of each buffer limiting body. The buffer limiting tongues of two adjacent buffer limiting bodies are staggered.

[0010] Multiple buffer limit tongues are evenly distributed circumferentially on the inner annular surface of each buffer limit body.

[0011] The circumference of the free ends of the multiple buffer limiting tongues of each buffer limiting body is larger than the head size of the pyrotechnic device but smaller than the maximum diameter of the pyrotechnic device.

[0012] A limiting platform corresponding to the protrusion of the buffer disc is provided on the upper end of the inner ring surface of a buffer limiting body that contacts the buffer disc.

[0013] The buffer seat and buffer limiting assembly are pressed onto the support protective cover by the support cover. Specifically, the fixing screws pass through the support cover, buffer seat and buffer limiting assembly in sequence and are fixedly connected to the support protective cover.

[0014] The beneficial effects of this invention are as follows: In the directional buffer structure of the unlocking support for an optical remote sensing camera, the pyrotechnic device is installed on the pyrotechnic locking seat via threads. During unlocking, the pyrotechnic device breaks off from the root of the thread. Due to the explosive separation impact, the parts other than the threaded section move instantaneously with high acceleration away from the installation interface. The buffer seat is designed with an internal structure according to the outer envelope shape and size of the buffer disc, and the buffer disc is placed inside the buffer seat. The buffer limiting assembly achieves a good buffer limiting effect through multi-level buffer limiting, with adjacent buffer limiting tongues arranged alternately. After the pyrotechnic device explodes and separates, it sequentially enters the buffer limiting assembly and the buffer disc. The buffer limiting tongue inside the buffer limiting assembly guides it, ensuring the certainty of its movement direction. The staggered unloading grooves of the buffer disc and the tongue of the buffer limiting assembly absorb most of the energy of the explosion impact, significantly reducing the impact transmitted to the satellite and optical remote sensing camera during the unlocking instant, thus ensuring the safety of the equipment on the satellite and camera. Due to the deformation of the pyrotechnic device after the explosion impact and the partial rebound after deformation, the staggered buffer limiting tongue of the buffer limiting assembly embeds the pyrotechnic device in the buffer limiting assembly. At the same time, in conjunction with the buffer disc, it restricts the impact flight path of the pyrotechnic device after unlocking and ultimately captures it, ensuring that there are no free-moving foreign objects in the support after unlocking. Attached Figure Description

[0015] Figure 1 This is a cross-sectional view of the overall structure of the optical remote sensing camera unlocking support directional buffer structure according to the present invention; Figure 2 This is a schematic diagram of the buffer limiting assembly structure in the directional buffer structure of the unlocking support of an optical remote sensing camera according to the present invention; Figure 3 This is a schematic diagram of the buffer disc structure in the directional buffer structure of the unlocking support of an optical remote sensing camera according to the present invention; Among them: 1. Buffer disc, 101. Unloading groove, 102. Protrusion, 2. Buffer limit assembly, 201. Buffer limit tongue, 202. Limiting platform, 3. Pyrotechnic locking seat, 4. Fixing screw, 5. Support cover, 6. Buffer seat, 7. Pyrotechnic, 8. Support protective cover. Detailed Implementation

[0016] The embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0017] See Figures 1-3 The optical remote sensing camera unlocking support directional buffer structure of the present invention includes: Support protective cover 8; The pyrotechnic device 7 is located inside the support protective cover 8, and the size of the head at the upper end of the pyrotechnic device 7 is smaller than the size of the lower end. The lower end of the pyrotechnic item 7 is connected to the pyrotechnic item locking seat 3 by a thread; A buffer limiting assembly 2 is provided on the upper end of the support protective cover 8. A buffer limiting tongue 201 is provided on the inner ring surface of the buffer limiting assembly 2. The free end of the buffer limiting tongue 201 away from the buffer limiting body is a flexible structure. A buffer seat 6 is installed at the upper end of the buffer limit assembly 2; The buffer disc 1 located in the buffer seat 6 has an inner diameter larger than the head size of the pyrotechnic 7 and smaller than the lower size. The buffer limiting assembly 2 and the buffer disc 1 guide, buffer, limit and lock the pyrotechnic 7 after the explosion. And the support cover 5 located at the upper end of the buffer seat 6, which presses the buffer seat 6 and the buffer limiting assembly 2 onto the support protective cover 8.

[0018] The buffer disc 1 includes a plurality of staggered unloading slots 101, which extend from the inner annular surface to the outer annular surface of the buffer disc 1.

[0019] The buffer disc 1 has multiple protrusions 102 evenly distributed around its outer circumference, and the outer ring surface of the protrusions 102 is larger than the inner ring surface of the support cover 5.

[0020] The central hole of the buffer disc 1 is larger than the head of the pyrotechnic 7 but smaller than its maximum diameter. After the pyrotechnic 7 detonates, it is limited by the buffer limiting assembly 2, and its head passes through the central hole of the buffer disc 1, preventing it from passing through other parts. The staggered unloading slots 101 of the buffer disc 1 absorb most of the impact energy from the detonation of the pyrotechnic 7, ensuring the safety of the equipment on the satellite and the optical remote sensing camera. The unloading slots 101 of the buffer disc 1 can be distributed in one or more groups, and their layout can be customized according to space and requirements.

[0021] The inner surface structure of the buffer seat 6 corresponds to the outer envelope structure and size of the buffer disc 1.

[0022] The buffer limiting assembly 2 includes multiple buffer limiting bodies arranged coaxially. Each buffer limiting body has multiple buffer limiting tongues 201 arranged on its inner annular surface. The buffer limiting tongues 201 of adjacent buffer limiting bodies are staggered.

[0023] Each buffer limiting tongue 201 can be arranged in various combinations. In this embodiment, multiple buffer limiting tongues 201 are evenly distributed around the inner annular surface of each buffer limiting body.

[0024] The circumferential dimension of the free ends of the multiple buffer limiting tongues 201 of each buffer limiting body is larger than the head dimension of the pyrotechnic 7, but smaller than the maximum diameter of the pyrotechnic 7.

[0025] In this embodiment, the buffer limiting assembly 2 includes two buffer limiting bodies to form a secondary buffer limiting. The buffer limiting tongues 201 of the lower primary buffer limiting body and the upper secondary buffer limiting body are arranged alternately. The spacing between the buffer limiting tongues 201 of the same level is greater than the head diameter of the pyrotechnic 7 and less than the maximum diameter of the lower part of the pyrotechnic 7. In this way, when the pyrotechnic 7 detonates, the thin end of the buffer limiting tongue 201 will deform in the same direction as the impact force, which can limit the movement path of the part of the pyrotechnic 7 that flies out of the structure and absorb part of the impact energy. In addition, after the impact, the buffer limiting tongue 201 will have some deformation rebound, thereby limiting the reverse movement of the part of the pyrotechnic 7 that flies out of the structure and fixing it.

[0026] A limiting platform 202 corresponding to the protrusion 102 of the buffer disc 1 is provided on the upper end of the inner ring surface of a buffer limiting body that contacts the buffer disc 1, thereby restricting axial movement.

[0027] The buffer seat 6 and the buffer limiting assembly 2 are pressed onto the support protective cover 8 by the support cover 5. Specifically, the fixing screw 4 passes through the support cover 5, the buffer seat 6 and the buffer limiting assembly 2 in sequence and is fixedly connected to the support protective cover 8.

[0028] The steps of the optical remote sensing camera unlocking support directional buffer structure of the present invention are as follows: 1) The buffer limiting assembly 2 in this embodiment includes two levels. The secondary buffer limiting is placed above the primary buffer limiting to ensure that the mounting holes are aligned. The buffer limiting tongues 201 of both buffer limiting bodies are located below, forming the buffer limiting assembly 2. 2) Install the pyrotechnic item 7 onto the pyrotechnic item locking seat 3; 3) Install the support protective cover 8 on the support; 4) Place the buffer limit assembly 2 on the support protective cover 8, align the holes, and position the buffer limit tongue 201 below; 5) Place the buffer disc 1 on the buffer limiting assembly 2, with the limiting platform 202 of the buffer limiting assembly 2 aligned with the protrusion 102 on the side of the buffer disc 1. 6) Place the buffer seat 6 onto the buffer disc 1, aligning the hole in the buffer seat 6 with the buffer limiting assembly 2; 7) Place the support cover 5 on the buffer seat 6, aligning the holes; 8) Secure the support cover 5, buffer seat 6 and buffer limit assembly 2 to the support protective cover 8 using fixing screws 4.

Claims

1. A directional buffer structure for an unlocking support of an optical remote sensing camera, characterized in that, include: Support protective cover (8); The pyrotechnic device (7) located inside the support protective cover (8) has a head size at the upper end that is smaller than the lower end size; The lower end of the pyrotechnic item (7) is connected to the pyrotechnic item locking seat (3) by a thread; A buffer limiting assembly (2) is provided on the upper end of the support protective cover (8). A buffer limiting tongue (201) is provided on the inner ring surface of the buffer limiting assembly (2). The free end of the buffer limiting tongue (201) is a flexible structure. A buffer seat (6) is set at the upper end of the buffer limit assembly (2). The buffer disc (1) located in the buffer seat (6) has an inner diameter larger than the head size of the pyrotechnic item (7) and smaller than the lower size. The buffer limiting assembly (2) and the buffer disc (1) guide, buffer, limit and lock the pyrotechnic item (7) after the explosion. The buffer disc (1) includes multiple unloading grooves (101) that are staggered and extend from the inner ring surface of the buffer disc (1) to the outer ring surface. And the support cover (5) located at the upper end of the buffer seat (6), through the support cover (5) pressing the buffer seat (6) and the buffer limiting assembly (2) onto the support protective cover (8); The buffer limiting assembly (2) includes multiple buffer limiting bodies arranged coaxially. Each buffer limiting body has multiple buffer limiting tongues (201) arranged on its inner annular surface. The buffer limiting tongues (201) of two adjacent buffer limiting bodies are staggered.

2. The optical remote sensing camera unlocking support directional buffer structure according to claim 1, characterized in that, The buffer disc (1) has multiple protrusions (102) evenly distributed around its outer surface. The outer ring surface of the protrusions (102) is larger than the inner ring surface of the support cover (5).

3. The optical remote sensing camera unlocking support directional buffer structure according to claim 2, characterized in that, The inner surface structure of the buffer seat (6) corresponds to the outer envelope structure and size of the buffer disc (1).

4. The optical remote sensing camera unlocking support directional buffer structure according to claim 1, characterized in that, Multiple buffer limiting tongues (201) are evenly distributed circumferentially on the inner annular surface of each buffer limiting body.

5. The optical remote sensing camera unlocking support directional buffer structure according to claim 4, characterized in that, The circumference of the free ends of the multiple buffer limiting tongues (201) of each buffer limiting body is larger than the head size of the pyrotechnic (7) and smaller than the maximum diameter of the pyrotechnic (7).

6. The optical remote sensing camera unlocking support directional buffer structure according to claim 1, characterized in that, A limiting platform (202) corresponding to the protrusion (102) of the buffer disc (1) is provided on the upper end of the inner ring surface of a buffer limiting body that contacts the buffer disc (1).

7. The optical remote sensing camera unlocking support directional buffer structure according to claim 1, characterized in that, The buffer seat (6) and the buffer limiting assembly (2) are pressed onto the support cover (8) by the support cover (5). Specifically, the fixing screw (4) passes through the support cover (5), the buffer seat (6) and the buffer limiting assembly (2) in sequence and is fixedly connected to the support cover (8).

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