阅读说明：本技术 一种激光通信用光学天线防尘机构 (Optical antenna dustproof mechanism for laser communication ) 是由 李小明 张天硕 张家齐 白杨杨 孟立新 于 2019-09-25 设计创作，主要内容包括：一种激光通信用光学天线防尘机构,应用于激光通信光端机,为了有效防止卫星发射时外部杂质侵入激光通信系统光学天线,其包括防尘组件的一端与旋转轴连接,防尘组件与定位组件一端销孔连接；定位组件另一端与光学天线的安装基板固连；旋转轴与安装基板固连,旋转轴上安装扭簧,尼龙缓冲件一端与安装基板固连,光学天线通过转台固定在安装基板上,遮光罩一端安装在光学天线的前端,另一端沿转台俯仰轴转动方向上设计为圆弧形状,其圆弧中心与转台的回转中心重合；当卫星发射时,转台固定到锁紧位置不动,防尘盖处于防尘位置,此时防尘组件位于遮光罩前方,完全遮盖住遮光罩的通光口径,能够防止污染物进入遮光罩后端的光学天线。(A laser communication optical antenna dustproof mechanism is applied to a laser communication optical transmitter and receiver, and aims to effectively prevent external impurities from invading into an optical antenna of a laser communication system when a satellite transmits, wherein one end of a dustproof assembly is connected with a rotating shaft, and the dustproof assembly is connected with a pin hole at one end of a positioning assembly; the other end of the positioning component is fixedly connected with a mounting substrate of the optical antenna; the rotary shaft is fixedly connected with the mounting substrate, a torsion spring is mounted on the rotary shaft, one end of the nylon buffer piece is fixedly connected with the mounting substrate, the optical antenna is fixed on the mounting substrate through the rotary table, one end of the light shield is mounted at the front end of the optical antenna, the other end of the light shield is designed to be in an arc shape along the rotation direction of the pitching shaft of the rotary table, and the arc center of the light shield is superposed with the rotation center of the rotary table; when the satellite transmits, the rotary table is fixed to the locking position and is fixed, the dustproof cover is located at the dustproof position, the dustproof assembly is located in front of the light shield, the light-passing aperture of the light shield is completely covered, and pollutants can be prevented from entering the optical antenna at the rear end of the light shield.)

1. The dustproof mechanism of the optical antenna for laser communication is characterized by comprising a dustproof assembly (1), a positioning assembly (2), a rotating shaft (3), a torsion spring (4), a nylon buffer piece (5) and a light shield (6); one end of the dustproof component (1) is connected with the rotating shaft (3), and the dustproof component (1) can rotate around the rotating shaft (3); the dustproof component (1) is connected with a pin hole at one end of the positioning component (2); the other end of the positioning component (2) is fixedly connected with a mounting substrate (9) of the optical antenna; the rotating shaft (3) is fixedly connected with the mounting base plate (9), the torsion spring (4) is mounted on the rotating shaft (3), when the dustproof assembly (1) is located at a dustproof position, the torsion spring (4) has restoring torque, and when the dustproof assembly (1) is located at a collection position, the restoring force of the torsion spring (4) is zero; one end of the nylon buffer piece (5) is fixedly connected with the mounting substrate (9), when the dustproof cover (1) is in a collection state, the other end of the nylon buffer piece (5) is just contacted with the dustproof assembly (1), on one hand, the dustproof assembly (1) is positioned, and simultaneously, the buffering effect is achieved when the dustproof assembly (1) is collected;

the optical antenna (7) is fixed on the mounting substrate (9) through the rotary table (8), and the rotary table (8) can drive the optical antenna (7) to rotate in two dimensions;

one end of the light shield (6) is arranged at the front end of the optical antenna (7), the other end of the light shield is designed to be in an arc shape along the rotating direction of the pitching shaft of the turntable (8), and the arc center of the light shield is superposed with the rotating center of the turntable (8); the dustproof assembly (1) is in an arc shape, and the arc parameters of the dustproof assembly are consistent with those of the light shield (6); when the satellite launches, revolving stage (8) are fixed to the locking position motionless, and shield (1) is in dustproof position, and dustproof subassembly (1) is located lens hood (6) the place ahead this moment, covers the logical light bore of lens hood (6) completely, can prevent that the pollutant from getting into optical antenna (7) at lens hood (6) rear end.

2. The optical antenna dustproof mechanism for laser communication according to claim 1, wherein the dustproof assembly (1) comprises a cover plate (1-1), a rubber pad (1-2), a buckle plate (1-3), a support rod (1-4), a dustproof positioning pin hole (1-5), a rotating shaft (1-6) and a locking positioning pin hole (1-7); the buckle plate (1-3) is arranged at the lower half part of the cover plate (1-1) and is of an integrated structure; the rubber pad (1-2) is arranged on the upper edge of the pinch plate (1-3); the support rod (1-4) is of an L-shaped structure, and one end of the support rod is fixedly connected with the cover plate (1-1); the support rods (1-4) are provided with rotating shafts (1-6), and the rotating shafts (1-6) are sleeved on the rotating shaft (3) and can rotate around the rotating shaft (3); the support rods (1-4) are respectively provided with dustproof positioning pin holes (1-5) and locking positioning pin holes (1-7).

3. The optical antenna dustproof mechanism for laser communication according to claim 2, wherein the positioning component (2) is composed of a support plate (2-1), a pin body (2-2), a spring (2-3), a memory alloy wire (2-4) and a heating component (2-5); the supporting plate (2-1) is fixedly connected with the mounting base plate (9), one end of the pin body (2-2) is designed to be of a conical structure and can slide back and forth in a positioning hole of the supporting plate (2-1), when the dustproof cover (1) is respectively positioned at a dustproof position and a collection position, the dustproof positioning pin hole (1-5) and the locking positioning pin hole (1-7) are positioned at the same position, and the two positioning pin holes are of conical structures and can be matched with the pin body (2-2); the positioning hole of the supporting plate (2-1) is designed into a step hole type, and plays a role in guiding the pin body (2-2); one end of the spring (2-3) is fixedly connected with the pin body (2-2), and the other end of the spring is fixedly connected with the supporting plate (2-1) to provide forward restoring force for the pin body (2-2); one end of the memory alloy wire (2-4) is fixedly connected with the pin body (2-2), the other end of the memory alloy wire is fixedly connected with the supporting plate (2-1), the memory alloy wire (2-4) is externally coated with the heating component (2-5), after the heating component (2-5) heats the memory alloy wire (2-4), the memory alloy wire (2-4) contracts, and the pin body (2-2) is pulled to slide backwards; after the heating assembly (2-5) stops heating, the temperature of the memory alloy wire (2-4) is reduced, and the pin body (2-2) slides forwards under the pushing of the spring (2-3) to return to the locking position.

4. The optical antenna dustproof mechanism for laser communication according to claim 2, wherein the light shield (6) is composed of a dustproof buckle plate (6-1) and a cover body (6-2), the dustproof buckle plate (6-1) and the cover body (6-2) are of an integral structure, the dustproof buckle plate (6-1) and the buckle plate (1-3) of the dustproof assembly (1) can be matched with each other, the width of the dustproof buckle plate (6-1) is equal to the total width of the cover plate (1-1) and the buckle plate (1-3), and a rubber gasket (1-2) is arranged between a connecting gap at the edge of the cover plate (1-1) and the dustproof buckle plate (6-1), so that impurities are effectively prevented from entering the light shield (6); the shape of the cover body (6-2) is consistent with the arc parameters of the cover plate (1-1) of the dustproof assembly (1).

Technical Field

The invention is applied to a laser communication optical transmitter and receiver, and relates to an optical antenna dustproof mechanism for laser communication.

Background

With the development of spatial information acquisition and sensing technology, the amount of information required to be transmitted by a satellite increases exponentially, and laser communication has the advantages of high communication rate, large information capacity and the like, and becomes an important satellite communication means. The optical performance of the laser communication optical transceiver, which is a core unit of the space laser communication technology, directly affects the laser communication capability. The laser communication optical transceiver is generally installed outside a satellite body, an optical window of a main optical antenna is opened, a rocket fairing is separated in the launching process, and generated pollutants such as debris and the like easily enter the optical antenna and are attached to the surface of an optical lens. When laser is reflected, the laser emitted by the host is reflected backwards and directly reflected back to the optical system under the influence of the attached pollutants, and then is received by the host receiving system together with communication laser emitted by the opposite party, which causes the reduction of the isolation of the optical system of the laser communication terminal, the reduction of the signal-to-noise ratio of the communication light received by the receiving system and emitted by the opposite party, the reduction of the communication performance and even the serious influence on the service life of the system. In order to improve the communication efficiency of a space laser communication system and ensure the isolation of an optical system, the invention provides a dustproof mechanism of an optical antenna for laser communication according to the working characteristics of a laser communication optical transceiver, so that the optical antenna is effectively prevented from being polluted in the transmitting process.

Disclosure of Invention

The invention provides a dustproof mechanism for an optical antenna for laser communication, which aims to effectively prevent external impurities from invading the optical antenna of a laser communication system when a satellite is launched.

The technical scheme of the invention is as follows:

a laser communication optical antenna dustproof mechanism is characterized by comprising a dustproof assembly, a positioning assembly, a rotating shaft, a torsion spring, a nylon buffer piece and a light shield; one end of the dustproof assembly is connected with the rotating shaft, and the dustproof assembly can rotate around the rotating shaft; the dustproof component is connected with a pin hole at one end of the positioning component; the other end of the positioning component is fixedly connected with a mounting substrate of the optical antenna; the rotating shaft is fixedly connected with the mounting base plate, a torsion spring is mounted on the rotating shaft, when the dustproof assembly is located at a dustproof position, the torsion spring has restoring torque, and when the dustproof assembly is located at a collection position, the restoring force of the torsion spring is zero; one end of the nylon buffer piece is fixedly connected with the mounting substrate, and when the dustproof cover is in a collection state, the other end of the nylon buffer piece is just contacted with the dustproof assembly, so that the dustproof assembly is positioned, and meanwhile, the buffering effect is achieved when the dustproof assembly is collected; the optical antenna is fixed on the mounting substrate through the rotary table, and the rotary table can drive the optical antenna to rotate in two dimensions; one end of the light shield is arranged at the front end of the optical antenna, the other end of the light shield is designed to be in an arc shape along the rotating direction of the turntable pitching shaft, and the arc center of the light shield is superposed with the rotating center of the turntable; the dustproof assembly is in an arc shape, and the arc parameters of the dustproof assembly are consistent with those of the lens hood; when the satellite transmits, the rotary table is fixed to the locking position and is fixed, the dustproof cover is located at the dustproof position, the dustproof assembly is located in front of the light shield, the light-passing aperture of the light shield is completely covered, and pollutants can be prevented from entering the optical antenna at the rear end of the light shield.

The invention has the beneficial effects that:

1. the invention adopts the dustproof assembly to protect the optical system in the satellite transmitting stage, and can effectively prevent the optical antenna from being polluted in the satellite transmitting process.

2. The dustproof assembly and the light shield are both designed in an arc shape, the dustproof buckle plate of the light shield can completely cover the dustproof cover, and the rubber pad in the dustproof assembly plays a better sealing role.

3. The positioning assembly can realize automatic positioning through the interaction among the spring, the memory alloy wire and the heating assembly.

4. The nylon buffer piece can not only prevent the dust-proof component and the mounting substrate from rigidly colliding, but also play a role in buffering, and also play a role in positioning the dust-proof component, thereby being beneficial to the accurate matching of the pin holes in the collection position.

5. After the satellite is launched, the dustproof mechanism is folded, so that the normal work of the laser communication terminal is not influenced, and the outer envelope size of the system is not additionally increased. The dustproof mechanism is simple and light in structure, easy to process and widely applicable to dustproof of the optical antenna.

Drawings

Fig. 1 is a schematic view of the entire structure of a dust-proof mechanism of an optical antenna for laser communication according to the present invention. The figure is taken as an abstract figure of the specification.

Fig. 2 is a schematic structural diagram of the dust-proof assembly according to the present invention.

FIG. 3 is a schematic view of the positioning assembly according to the present invention.

Fig. 4 is a schematic view of the structure of the light shield according to the present invention.

Detailed Description

The invention is described in detail below with reference to the accompanying drawings:

the utility model provides an optical antenna dustproof mechanism for laser communication, its includes dustproof subassembly 1, locating component 2, rotation axis 3, torsional spring 4, nylon buffer 5 and lens hood 6. One end of the dustproof assembly 1 is connected with the rotating shaft 3, and the dustproof assembly 1 can rotate around the rotating shaft 3. The dustproof component 1 is connected with one end of the positioning component 2 through a pin hole. The other end of the positioning component 2 is fixedly connected with a mounting substrate 9 of the optical antenna. The rotating shaft 3 is fixedly connected with the mounting base plate 9, the torsion spring 4 is mounted on the rotating shaft 3, when the dustproof assembly 1 is located at the dustproof position, the torsion spring 4 has restoring torque, and when the dustproof assembly 1 is located at the collection position, the restoring force of the torsion spring 4 is zero. One end of the nylon buffer piece 5 is fixedly connected with the mounting substrate 9, when the dustproof cover 1 is in a collection state, the other end of the nylon buffer piece 5 just contacts with the dustproof assembly 1, on one hand, the dustproof assembly 1 is positioned, and meanwhile, the nylon buffer piece plays a role in buffering when the dustproof assembly 1 is collected.

The optical antenna 7 is fixed on the mounting substrate 9 through the turntable 8, and the turntable 8 can drive the optical antenna 7 to rotate in two dimensions.

One end of the light shield 6 is installed at the front end of the optical antenna 7, and the other end of the light shield is designed to be in an arc shape along the rotating direction of the pitching shaft of the turntable 8, and the arc center of the light shield coincides with the rotating center of the turntable 8. The dustproof assembly 1 is also designed to be in a circular arc shape, and the circular arc parameters of the dustproof assembly are consistent with those of the light shield 6. When the satellite launches, revolving stage 8 is fixed to the locking position motionless, and shield 1 is in dustproof position, and dustproof subassembly 1 is located lens hood 6 the place ahead this moment, covers the logical light bore of lens hood 6 completely, can prevent that the pollutant from getting into optical antenna 7 at lens hood 6 rear end.

The dustproof assembly 1 consists of a cover plate 1-1, a rubber pad 1-2, a buckle plate 1-3, a support rod 1-4, a dustproof positioning pin hole 1-5, a rotating shaft 1-6 and a locking positioning pin hole 1-7; the buckle plate 1-3 is arranged at the lower half part of the cover plate 1-1, and the buckle plate and the cover plate are of an integral structure; the rubber pad 1-2 is arranged on the upper edge of the pinch plate 1-3; the support rod 1-4 is of an L-shaped structure, and one end of the support rod is fixedly connected with the cover plate 1-1. The support rods 1-4 are provided with rotating shafts 1-6, and the rotating shafts 1-6 are sleeved on the rotating shaft 3 and can rotate around the rotating shaft 3. The support rods 1-4 are respectively provided with dustproof positioning pin holes 1-5 and locking positioning pin holes 1-7 which are of conical structures, and when the dustproof cover 1 is respectively positioned at a dustproof position and a storage position, the dustproof positioning pin holes 1-5 and the locking positioning pin holes 1-7 are positioned at the same positions and can be matched with the pin bodies 2-2.

The positioning component 2 consists of a supporting plate 2-1, a pin body 2-2, a spring 2-3, a memory alloy wire 2-4 and a heating component 2-5. The supporting plate 2-1 is fixedly connected with the mounting base plate 9, and one end of the pin body 2-2 is designed to be of a conical structure and can slide back and forth in a positioning hole of the supporting plate 2-1. The positioning hole of the supporting plate 2-1 is designed into a step hole type and plays a role in guiding the pin body 2-2. One end of the spring 2-3 is fixedly connected with the pin body 2-2, and the other end of the spring is fixedly connected with the supporting plate 2-1, so that forward restoring force is provided for the pin body 2-2. One end of the memory alloy wire 2-4 is fixedly connected with the pin body 2-2, the other end of the memory alloy wire is fixedly connected with the supporting plate 2-1, the heating component 2-5 is coated outside the memory alloy wire 2-4, after the heating component 2-5 heats the memory alloy wire 2-4, the memory alloy wire 2-4 contracts, and the pin body 2-2 is pulled to slide backwards; after the heating assembly 2-5 stops heating, the temperature of the memory alloy wire 2-4 is reduced, and the pin body 2-2 slides forwards under the pushing of the spring 2-3 and returns to the locking position.

The light shield 6 consists of a dustproof buckle plate 6-1 and a shield body 6-2, and the dustproof buckle plate 6-1 and the shield body 6-2 are of an integral structure. The dustproof buckle 6-1 of the light shield 6 and the buckle 1-3 of the dustproof assembly 1 can be matched with each other, the width of the dustproof buckle 6-1 is equal to the total width of the cover plate 1-1 and the buckle 1-3, a rubber gasket 1-2 is arranged between the connecting gap of the cover plate 1-1 and the edge of the dustproof buckle 6-1, and under the action of the rubber gasket 1-2 of the dustproof assembly 1, a dustproof state with excellent sealing performance can be formed, and impurities can be effectively prevented from entering the light shield 6. The cover body 6-2 of the light shield 6 and the cover plate 1-1 of the dustproof assembly 1 are designed to be consistent in arc parameters.

The specific implementation steps of the system during working are as follows:

step 1: before satellite launching, the dustproof assembly 1 is located at a dustproof position, the rotary table 8 is located at a locking position, the cover plate 1-1 and the buckle plate 1-3 of the dustproof assembly 1 are matched with the dustproof buckle plate 6-1 of the light shield 6 to play a dustproof role, and the pin body 2-2 in the positioning assembly 2 is matched with the conical hole 1-5 of the dustproof positioning pin hole 1-5 in the dustproof assembly 1 to keep the dustproof assembly 1 in a fixed dustproof position;

step 2: after the satellite enters the orbit, the dustproof requirement is not needed, the rotary table 8 is unlocked to drive the light shield 6 to rotate anticlockwise around the pitching direction, and after the light shield 6 rotates out of the structural working envelope space required by the collection of the dustproof assembly 1, the rotary table 8 stops rotating and keeps still;

and step 3: a heating component 2-5 in the positioning component 2 is electrified to heat a memory alloy wire 2-4, the memory alloy wire 2-4 is heated to shrink to drive a pin body 2-2 to move backwards, and the pin body 2-2 is disengaged from a dustproof positioning pin hole 1-5 of the dustproof component 1;

and 4, step 4: the dustproof assembly 1 rotates anticlockwise around the rotating shaft 3 under the action of restoring force of the torsion spring 4, and stops at a collection position after being buffered and positioned by the nylon buffer piece 5;

and 5: heating of the heating assembly 2-5 in the positioning assembly 2 is stopped, the memory alloy wire 2-4 extends after the temperature is reduced, and the pin body 2-2 slides forwards under the pushing force of the spring 2-3, so that the pin body 2-2 returns to the locking position;

step 6: a pin body 2-2 in the positioning component 2 is inserted into a locking positioning pin hole 1-7 of the dustproof cover 1 to form a pin hole matching with the locking positioning pin hole, so that the dustproof component 1 is locked and is ensured to be immovable at a collection position;

at this time, the turntable 8 rotates arbitrarily within the operating range to operate.