Optical equipment two-degree-of-freedom adjusting platform suitable for interior of wind tunnel test section

Abstract

The invention relates to the technical field of wind tunnel test equipment, in particular to an optical equipment two-degree-of-freedom adjusting platform suitable for the interior of a wind tunnel test section, which comprises a mounting seat, a course deviation adjusting part, a pitching direction adjusting part and a thermal protective cover. The course deviation adjusting part is connected with the mounting base and can rotate relative to the mounting base when course deviation adjustment is needed. The pitching direction adjusting part is connected with the course deviation adjusting part and rotates along with the course deviation adjusting part. The thermal protection cover is used for placing optical equipment and comprises a protection shell, an optical window and a sealing cover, the optical window and the sealing cover are arranged at the front end and the rear end of the protection shell respectively, a wire passing hole is formed in the sealing cover, the thermal protection cover is connected with the pitching direction adjusting part, and the pitching angle of the thermal protection cover can be adjusted through the pitching direction adjusting part. The platform can be suitable for a test environment in a hypersonic wind tunnel test section, meets the anti-scour requirement of equipment, and can meet the requirements for fixation of optical equipment for illumination, shooting and the like and rapid adjustment of the equipment in the course deviation direction and the pitching direction.

Description

Technical Field

[0001] The invention relates to the technical field of wind tunnel test equipment, and in particular to a double-degree-of-freedom adjustment platform for optical equipment inside a wind tunnel test section. Background Art

[0002] Non-contact optical measurement can obtain higher temporal and spatial resolution and is widely used in wind tunnel testing technology. However, in hypersonic wind tunnels, due to the low vacuum, high-temperature inflow, and strong scouring vibration, it is difficult to place general shooting and lighting equipment in the test section. Generally, lighting or shooting is carried out from the outside of the test section through observation windows above or on the side of the tunnel. However, with the change of spatial scale and flow field density, the accuracy of the measurement results will be reduced. Therefore, placing lighting or test equipment inside the test section to obtain test data with higher temporal and spatial resolution has become an urgent need for technicians engaged in wind tunnel testing. Summary of the invention

[0003] The purpose of the present invention is to provide a dual-degree-of-freedom adjustment platform for optical equipment suitable for use in a wind tunnel test section.

[0004] In order to achieve the above object, the present invention provides a dual-degree-of-freedom adjustment platform for optical equipment in a wind tunnel test section, comprising:

[0005] A mounting base, used for connection with the wind tunnel test section;

[0006] The yaw direction adjustment part is connected to the mounting seat and can rotate relative to the mounting seat when the yaw direction adjustment is required;

[0007] The pitch adjustment part is connected to the yaw adjustment part and rotates with the yaw adjustment part;

[0008] The heat shield is used to place optical equipment. The heat shield includes a protective shell, an optical window arranged at the front end of the protective shell, and a sealing cover arranged at the rear end of the protective shell. The sealing cover is provided with a wire hole. The heat shield is connected to a pitch adjustment part, and the pitch angle of the heat shield can be adjusted through the pitch adjustment part.

[0009] Optionally, the yaw direction adjustment unit includes a rotating disk, a first locking screw and a first adjusting screw, the rotating disk is provided with a first locking through hole and a plurality of first arc-shaped slideways, the plurality of first arc-shaped slideways surround the first locking through hole and are concentric with the first locking through hole;

[0010] The mounting seat is provided with a first locking screw hole and a plurality of first connecting screw holes, the first locking screw hole is coaxially arranged with the first locking through hole, and the plurality of first connecting screw holes are respectively arranged corresponding to each first arc-shaped slideway;

[0011] The first locking screw passes through the first locking through hole and is threadedly connected with the first locking screw hole. The first adjusting screw passes through the first arc-shaped slideway and is threadedly connected with the corresponding first connecting screw hole.

[0012] Optionally, the yaw direction adjustment unit includes a rotating disk, a first locking screw and a plurality of first adjustment screws, the rotating disk is provided with a first locking through hole and a first annular slideway surrounding the first locking through hole, and the first annular slideway is concentrically arranged with the first locking through hole;

[0013] The mounting seat is provided with a first locking screw hole and a plurality of first connecting screw holes, the first locking screw hole is coaxially arranged with the first locking through hole, and the plurality of first connecting screw holes are evenly spaced and distributed in the circumferential direction and are arranged corresponding to the first annular slideway;

[0014] The first locking screw passes through the first locking through hole and is threadedly connected with the first locking screw hole. The first adjusting screw passes through the first annular slideway and is threadedly connected with the corresponding first connecting screw hole.

[0015] Optionally, a plurality of connecting rods are provided at intervals on the lower side of the turntable, and the pitch adjustment part is connected to the turntable via the plurality of connecting rods.

[0016] Optionally, the pitch adjustment part includes a bottom plate, two baffles and two rotating plates, and the bottom plate is connected to the connecting rod;

[0017] The baffle is provided with a second locking through hole and a plurality of second arc-shaped slideways, the plurality of second arc-shaped slideways surround the second locking through hole and are concentric with the second locking through hole, and the two baffles are arranged in parallel and spaced apart and fixedly mounted on the bottom plate at one end;

[0018] The rotating plate is provided with a second locking screw hole and a plurality of second connecting screw holes, the plurality of second connecting screw holes are evenly distributed around the second locking screw hole, and the two rotating plates are arranged in parallel and spaced apart and fixed at one end to the protective housing;

[0019] The two rotating plates are located between the two baffles, the second locking through hole on each baffle is coaxial with the second locking screw hole on the adjacent rotating plate, the multiple second arc-shaped slides on the baffle are respectively arranged corresponding to the multiple second connecting screw holes on the adjacent rotating plates, the second locking screw passes through the second locking through hole and is threadedly connected to the second locking screw hole, and the second adjustment screw passes through the second arc-shaped slide and is threadedly connected to the corresponding second connecting screw hole.

[0020] Optionally, the pitch adjustment part includes a bottom plate, two baffles and two rotating plates, and the bottom plate is connected to the connecting rod;

[0021] The baffle is provided with a second locking through hole and a second annular slideway surrounding the second locking through hole, the second annular slideway is arranged concentrically with the second locking through hole, and the two baffles are arranged in parallel and spaced apart and fixedly mounted on the bottom plate at one end;

[0022] The rotating plate is provided with a second locking screw hole and a plurality of second connecting screw holes, the plurality of second connecting screw holes are evenly distributed around the second locking screw hole, and the two rotating plates are arranged in parallel and spaced apart and fixed at one end to the protective housing;

[0023] The two rotating plates are located between the two baffles, the second locking through hole on each baffle is coaxial with the second locking screw hole on the adjacent rotating plate, the multiple second connecting screw holes on the rotating plate are arranged corresponding to the second annular slides on the adjacent baffles, the second locking screw passes through the second locking through hole and is threadedly connected to the second locking screw hole, and the second adjusting screw passes through the second annular slide and is threadedly connected to the corresponding second connecting screw hole.

[0024] Optionally, the lengths of the multiple connecting rods are different, and the connecting rods have an inclined end surface at one end away from the mounting seat, the inclined end surfaces of the ends of the connecting rods are located on the same plane, and there is an angle between the plane and the mounting seat. The pitch adjustment part is connected to the inclined end surfaces of the multiple connecting rods, so that when the center line of the heat protection cover in the front-to-back direction is parallel to the plane, the optical window faces the direction of the model to be tested.

[0025] Optionally, the inclined end surfaces of the plurality of connecting rods are connected to a connecting plate, and the pitch adjustment portion is connected to the plurality of connecting rods via the connecting plate.

[0026] Optionally, the pitch adjustment portion is detachably connected to the connecting plate via screws.

[0027] Optionally, the sealing cover is further provided with an air inlet hole and an air outlet hole, the air inlet hole is used to be connected to a cold air source, and the air outlet hole is used to be connected to an air extraction pump.

[0028] The above technical solution of the present invention has the following advantages:

[0029] The present invention provides a dual-degree-of-freedom adjustment platform for optical equipment inside a wind tunnel test section, comprising a mounting seat, a yaw adjustment portion, a pitch adjustment portion and a heat shield. The yaw adjustment portion is connected to the mounting seat and can rotate relative to the mounting seat when yaw adjustment is required. After the adjustment is completed, the yaw adjustment portion and the mounting seat can be relatively fixed. The pitch adjustment portion is connected to the yaw adjustment portion and rotates with the yaw adjustment portion. The heat shield is used to place optical equipment. Among them, the heat shield includes a protective shell, an optical window arranged at the front end of the protective shell, and a sealing cover arranged at the rear end of the protective shell, and the sealing cover is provided with a wire hole, and the heat shield is connected to the pitch adjustment portion, and the pitch angle of the heat shield can be adjusted through the pitch adjustment portion, thereby realizing the pitch angle adjustment of the internal optical equipment. The adjustment platform can be used in the test environment within the hypersonic wind tunnel test section, meet the anti-scouring requirements of the equipment, and can meet the requirements of rapid fixation of optical equipment such as lighting and shooting, as well as rapid adjustment of the yaw and pitch directions of the equipment. At the same time, the adjustment platform itself has a miniaturized structure, which is easy to adjust and has strong popularization. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings of the present invention are provided for illustrative purposes only, and the proportions and quantities of the components in the drawings may not necessarily be consistent with the actual products.

[0031] Figure 1 It is a structural schematic diagram of a dual-degree-of-freedom adjustment platform for optical equipment suitable for use in a wind tunnel test section in an embodiment of the present invention;

[0032] Figure 2 is a schematic structural diagram of a mounting base in an embodiment of the present invention;

[0033] Figure 3 It is a structural schematic diagram of a turntable and a connecting rod in an embodiment of the present invention;

[0034] Figure 4 is a structural schematic diagram of a connecting plate in an embodiment of the present invention;

[0035] Figure 5 is a structural schematic diagram of a bottom plate and a baffle in an embodiment of the present invention;

[0036] Figure 6 is a schematic structural diagram of a protective cover in an embodiment of the present invention;

[0037] Figure 7 It is a structural schematic diagram of an optical device dual-degree-of-freedom adjustment platform installed inside a wind tunnel in an embodiment of the present invention.

[0038] In the figure:

[0039] 1: Mounting seat;

[0040] 11: First locking screw hole;

[0041] 12: first connecting screw hole;

[0042] 2: Yaw adjustment unit;

[0043] 21: Turntable;

[0044] 211: first locking via hole;

[0045] 212: first curved slide;

[0046] 22: first locking screw;

[0047] 23: first adjusting screw;

[0048] 24: connecting rod;

[0049] 25: connecting plate;

[0050] 3: Pitch adjustment unit;

[0051] 31: bottom plate;

[0052] 32: baffle;

[0053] 321: second locking via hole;

[0054] 322: second curved slide;

[0055] 33: rotating plate;

[0056] 331: second locking screw hole;

[0057] 332: second connecting screw hole;

[0058] 34: second locking screw;

[0059] 35: second adjusting screw;

[0060] 4: Heat protection shield;

[0061] 41: protective shell;

[0062] 42: Sealing cover;

[0063] 421: cable hole;

[0064] 422: air intake;

[0065] 423: vent;

[0066] 5: test section;

[0067] 6: Nozzle;

[0068] 7: Diffuser;

[0069] 8: Model to be tested. DETAILED DESCRIPTION

[0070] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0071] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0072] Furthermore, in the description of the present invention, unless otherwise specified, “plurality” means two or more.

[0073] In the description of the present invention, the terms “first”, “second” and “third” are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0074] Embodiment 1

[0075] like Figure 1 As shown, the optical device dual-degree-of-freedom adjustment platform suitable for use in a wind tunnel test section provided in an embodiment of the present invention comprises a mounting seat 1, a yaw adjustment portion 2, a pitch adjustment portion 3 and a heat shield 4. The mounting seat 1 is used to connect to the wind tunnel test section, and can be fixed by welding, or connected by screws or bolts, or connected to the wind tunnel test section by a slide rail. This is not limited in this embodiment.

[0076] The yaw direction adjusting part 2 is connected to the mounting seat 1, and can rotate relative to the mounting seat 1 when the yaw direction adjustment is required. After the adjustment is completed, the yaw direction adjusting part 2 and the mounting seat 1 can be relatively fixed.

[0077] The pitch adjustment unit 3 is connected to the yaw adjustment unit 2 and rotates along with the yaw adjustment unit 2 .

[0078] The heat shield 4 is used to place optical equipment. The heat shield 4 includes a protective shell 41, an optical window arranged at the front end of the protective shell 41, and a sealing cover 42 arranged at the rear end of the protective shell 41. The sealing cover 42 is provided with a wire hole 421. The heat shield 4 is connected to the pitch adjustment part 3. The pitch angle of the heat shield 4 can be adjusted through the pitch adjustment part 3, thereby realizing the pitch angle adjustment of the internal optical equipment. It should be noted that the connection between the sealing cover 42 and the protective shell 41 can adopt existing technology, such as threaded connection, flange connection, screw fastening, quick release lock, etc., which is not limited here.

[0079] The dual-degree-of-freedom adjustment platform for optical equipment in a wind tunnel test section provided in this embodiment can be adapted to the test environment in a hypersonic wind tunnel test section, meet the anti-scouring and ventilation requirements of the equipment, and can meet the requirements for rapid fixation of optical equipment such as lighting and photography, as well as rapid adjustment of the yaw and pitch directions of the equipment. At the same time, the adjustment platform itself is a miniaturized structure with a simple structure, convenient adjustment, and strong scalability.

[0080] In one example, see Figure 1 to Figure 3 As shown, the yaw direction adjustment unit 2 includes a rotating disk 21, a first locking screw 22 and a first adjusting screw 23. The rotating disk 21 is provided with a first locking through hole 211 and a plurality of first arc-shaped slideways 212. The plurality of first arc-shaped slideways 212 surround the first locking through hole 211 and are concentric with the first locking through hole 211. The number of the first arc-shaped slideways 212 can be two, three, four, etc., which is not limited here. The curvature and length of the first arc-shaped slideway 212 can be set according to the range of the yaw direction to be adjusted, which is not limited here.

[0081] The mounting base 1 is provided with a first locking screw hole 11 and a plurality of first connecting screw holes 12. When the turntable 21 is connected to the mounting base 1, the first locking screw hole 11 is coaxially arranged with the first locking through hole 211, and the number of the first connecting screw holes 12 is the same as the number of the first arc-shaped slideways 212, and each of the first connecting screw holes 12 is arranged corresponding to one of the first arc-shaped slideways 212.

[0082] The first locking screw 22 passes through the first locking through hole 211 and is threadedly connected to the first locking screw hole 11. The first adjusting screw 23 passes through the first arc-shaped slideway 212 and is threadedly connected to the corresponding first connecting screw hole 12, so as to realize the connection and fixation between the turntable 21 and the mounting seat 1. When the angle needs to be adjusted, the first locking screw 22 is slightly loosened, and then each first adjusting screw 23 is loosened, and the turntable 21 can be rotated relative to the mounting seat 1. After rotating to the required angle, the first locking screw 22 and each first adjusting screw 23 are tightened in sequence to fix the yaw angle. The first locking screw 22 mainly plays a fixing role to prevent the turntable 21 from falling during the adjustment process. The yaw adjustment part 2 is easy to adjust and has a simple structure.

[0083] For some examples, see Figure 1 and Figure 3 As shown, a plurality of connecting rods 24 are provided at intervals on the lower side of the turntable 21, and the pitch adjustment part 3 is connected to the turntable 21 through the plurality of connecting rods 24. The connecting rods 24 are mainly used to adjust the position of the optical device in the radial direction of the test section, and the specific length can be set according to needs and is not limited here.

[0084] For some examples, see Figure 1 , Figure 5 and Figure 6 As shown, the pitch adjustment part 3 includes a bottom plate 31 , two baffles 32 and two rotating plates 33 , and the bottom plate 31 is connected to the connecting rod 24 .

[0085] The baffle plate 32 is provided with a second locking hole 321 and a plurality of second arc-shaped slideways 322 . The plurality of second arc-shaped slideways 322 surround the second locking hole 321 and are concentric with the second locking hole 321 . The two baffle plates 32 are arranged in parallel and spaced apart and fixedly mounted on the bottom plate 31 at one end.

[0086] The rotating plate 33 is provided with a second locking screw hole 331 and a plurality of second connecting screw holes 332 . The plurality of second connecting screw holes 332 are evenly distributed around the second locking screw hole 331 . The two rotating plates 33 are arranged in parallel and spaced apart and fixed at one end to the protective shell 41 .

[0087] The two rotating plates 33 are located between the two baffles 32, and the second locking through hole 321 on each baffle 32 is coaxial with the second locking screw hole 331 on the adjacent rotating plate 33. The multiple second arc-shaped slideways 322 on the baffle 32 are respectively arranged corresponding to the multiple second connecting screw holes 332 on the adjacent rotating plates 33. The second locking screw 34 passes through the second locking through hole 321 and is threadedly connected to the second locking screw hole 331. The second adjusting screw 35 passes through the second arc-shaped slideway 322 and is threadedly connected to the corresponding second connecting screw hole 332, thereby realizing the connection and fixation between the heat protection cover 4 and the pitch adjustment part 3.

[0088] When the pitch angle needs to be adjusted, the second locking screw 34 is slightly loosened, and then each second adjusting screw 35 is loosened, and the rotating plate 33 can be rotated relative to the baffle 32. After the rotation reaches the desired angle, the second locking screw 34 and each second adjusting screw 35 are sequentially tightened to fix the pitch angle. The second locking screw 34 mainly plays a fixing role to prevent the heat shield 4 from falling during the adjustment process. The pitch adjustment part 3 is easy to adjust and has a simple structure.

[0089] For some examples, see Figure 1 and Figure 3As shown, the lengths of the multiple connecting rods 24 are different, that is, there is a height difference. And the connecting rod 24 has an inclined end face at one end away from the mounting seat 1, and the inclined end faces of the ends of each connecting rod 24 are located on the same plane, and there is an angle between the plane and the mounting seat 1. The pitch adjustment part 3 is connected to the inclined end faces of the multiple connecting rods 24, so that when the center line of the front and rear ends of the heat shield 4 is parallel to the plane, the optical window faces the direction of the model to be tested. Then, the optical device located in the heat shield 4 has a certain initial angle, reducing the adjustment workload. It should be noted that the height difference between the connecting rods 24 is determined by the initial angle to be set, which is not limited here. In a specific example, the angle between the plane and the mounting seat is 45°, and when the center line of the front and rear ends of the heat shield 4 is parallel to the plane (initial state), the center of the field of view of the optical window is located at the center of the model to be tested. At different test angles or when testing different models to be tested, only a relatively small angle adjustment of the heat shield is required to meet the pitch test requirements and reduce the adjustment workload.

[0090] In order to make the pitch adjustment part 3 modular and convenient for installation and replacement, in some examples, see Figure 1 and Figure 4 As shown, the inclined end faces of the plurality of connecting rods 24 are connected to a connecting plate 25, and the pitch adjustment part 3 is connected to the plurality of connecting rods 24 through the connecting plate 25. In a specific embodiment, the connecting plate 25 is provided with a receiving hole for receiving the connecting rods 24, and the plurality of connecting rods 24 are inserted into the receiving hole, and can be fixed by welding or connected by interference fit, which is not limited here. The bottom plate 31 and the connecting plate 25 are connected and fixed by screws and screw holes.

[0091] In this embodiment, the optical device is an optical lighting or testing device such as a light source or a camera.

[0092] It should be noted that the material of the heat protection cover 4 is an existing heat protection material, which can be selected according to the usage scenario and is not limited here.

[0093] In some examples, the protective housing 41 is divided into a lens compartment and a body compartment to accommodate some camera equipment. The optical window is located at the end of the lens compartment. The optical window is generally made of optical glass. The thickness and material of the optical window must meet the internal flow intensity of the wind tunnel and the test requirements. The wire hole 421 is well sealed and thermally protected. The extended cable can be passed from the inside of the test section to the outside through the flange (this is the prior art in the field of wind tunnels). The sealing and thermal protection of the wire hole 421 can be carried out by existing technologies, which will not be repeated here.

[0094] In order to be suitable for higher temperature environments or to meet longer test requirements, in some examples, the sealing cover 42 is also provided with an air inlet 422 and an air outlet 423, the air inlet 422 is used to connect to a cold air source (not shown in the figure), and the air outlet 423 is used to connect to an air pump (not shown in the figure). During the test, cold air is filled into the heat protection cover 4 and then extracted by the air pump to reduce the temperature inside the heat protection cover 4 and protect the equipment. In a specific example, the cold air source and the air pump are respectively connected to the air inlet 422 and the air outlet 423 through an air pipe. It should be noted that the cold air source and the air pump are both existing equipment, both of which are located on the outside of the wind tunnel test section, and the extended cables can be passed from the inside of the test section to the outside through a flange, and the thermal protection of the air pipe can be achieved by using existing technology.

[0095] See also Figure 7 The figure shows a usage scenario of a dual-degree-of-freedom adjustment platform for optical devices in this embodiment. Multiple dual-degree-of-freedom adjustment platforms for optical devices are distributed and installed in the test section 5 according to test requirements, the model to be tested 8 is located between the nozzle 6 and the diffuser 7, and the optical device faces the center of the model to be tested 8.

[0096] Embodiment 2

[0097] The second embodiment is basically the same as the first embodiment, and the similarities are not repeated here. The difference is that: a plurality of first arc-shaped slideways 212 are connected in the circumferential direction to form a ring, that is, a first ring-shaped slideway is formed. A plurality of second arc-shaped slideways 322 are connected in the circumferential direction to form a ring, that is, a second ring-shaped slideway is formed, thereby increasing the range of the adjustment angle.

[0098] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that not every embodiment contains only one independent technical solution. In the absence of a conflict of solutions, the various technical features mentioned in each embodiment can be combined in any manner to form other implementation methods that can be understood by those skilled in the art.

[0099] In addition, without departing from the scope of the present invention, the technical solutions described in the aforementioned embodiments may be modified, or some of the technical features may be replaced by equivalents, without causing the essence of the corresponding technical solutions to depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A dual-degree-of-freedom adjustment platform for optical equipment in a wind tunnel test section, characterized in that: include: A mounting base, used for connection with the wind tunnel test section; A yaw direction adjustment unit connected to the mounting seat and capable of rotating relative to the mounting seat when yaw direction adjustment is required; A pitch adjustment unit connected to the yaw adjustment unit and rotating with the yaw adjustment unit; A heat shield is used to place optical equipment, the heat shield comprises a protective shell, an optical window arranged at the front end of the protective shell and a sealing cover arranged at the rear end of the protective shell, the sealing cover is provided with a wire hole, the heat shield is connected to the pitch adjustment part, and the pitch angle of the heat shield can be adjusted through the pitch adjustment part.

2. The optical device dual-degree-of-freedom adjustment platform according to claim 1, characterized in that: The yaw direction adjustment part comprises a rotating disk, a first locking screw and a first adjusting screw, the rotating disk is provided with a first locking through hole and a plurality of first arc-shaped slideways, the plurality of first arc-shaped slideways surround the first locking through hole and are concentric with the first locking through hole; The mounting seat is provided with a first locking screw hole and a plurality of first connecting screw holes, the first locking screw hole is coaxially arranged with the first locking through hole, and the plurality of first connecting screw holes are respectively arranged corresponding to each of the first arc-shaped slideways; The first locking screw passes through the first locking through hole and is threadedly connected to the first locking screw hole, and the first adjusting screw passes through the first arc-shaped slideway and is threadedly connected to the corresponding first connecting screw hole.

3. The optical device dual-degree-of-freedom adjustment platform according to claim 2, characterized in that: The yaw direction adjustment unit comprises a rotating disk, a first locking screw and a plurality of first adjustment screws, the rotating disk is provided with a first locking through hole and a first annular slideway surrounding the first locking through hole, and the first annular slideway is arranged concentrically with the first locking through hole; The mounting seat is provided with a first locking screw hole and a plurality of first connecting screw holes, the first locking screw hole is coaxially arranged with the first locking through hole, and the plurality of first connecting screw holes are evenly spaced in the circumferential direction and are arranged corresponding to the first annular slideway; The first locking screw passes through the first locking through hole and is threadedly connected to the first locking screw hole, and the first adjusting screw passes through the first annular slideway and is threadedly connected to the corresponding first connecting screw hole.

4. The optical device dual-degree-of-freedom adjustment platform according to claim 2 or 3, characterized in that: A plurality of connecting rods are arranged at intervals on the lower side of the turntable, and the pitch adjustment part is connected to the turntable through the plurality of connecting rods.

5. The dual-degree-of-freedom adjustment platform for optical equipment according to claim 4, characterized in that: The pitch adjustment part comprises a bottom plate, two baffles and two rotating plates, and the bottom plate is connected to the connecting rod; The baffle plate is provided with a second locking through hole and a plurality of second arc-shaped slideways, the plurality of second arc-shaped slideways surround the second locking through hole and are concentric with the second locking through hole, and the two baffle plates are arranged in parallel and spaced apart and fixedly mounted on the bottom plate at one end; The rotating plate is provided with a second locking screw hole and a plurality of second connecting screw holes, the plurality of second connecting screw holes are evenly distributed around the second locking screw hole, the two rotating plates are arranged in parallel and spaced apart and one end of each is fixed to the protective housing; The two rotating plates are located between the two baffles, the second locking through hole on each baffle is coaxial with the second locking screw hole on the adjacent rotating plate, the multiple second arc-shaped slides on the baffle are respectively arranged corresponding to the multiple second connecting screw holes on the adjacent rotating plates, the second locking screw passes through the second locking through hole and is threadedly connected to the second locking screw hole, and the second adjusting screw passes through the second arc-shaped slide and is threadedly connected to the corresponding second connecting screw hole.

6. The optical device dual-degree-of-freedom adjustment platform according to claim 4, characterized in that: The pitch adjustment part comprises a bottom plate, two baffles and two rotating plates, and the bottom plate is connected to the connecting rod; The baffle plate is provided with a second locking through hole and a second annular slideway surrounding the second locking through hole, the second annular slideway is arranged concentrically with the second locking through hole, and the two baffle plates are arranged in parallel and spaced apart and fixedly mounted on the bottom plate at one end; The rotating plate is provided with a second locking screw hole and a plurality of second connecting screw holes, the plurality of second connecting screw holes are evenly distributed around the second locking screw hole, the two rotating plates are arranged in parallel and spaced apart and one end of each is fixed to the protective housing; The two rotating plates are located between the two baffles, the second locking through hole on each baffle is coaxial with the second locking screw hole on the adjacent rotating plate, the multiple second connecting screw holes on the rotating plate are arranged corresponding to the second annular slides on the adjacent baffles, the second locking screw passes through the second locking through hole and is threadedly connected to the second locking screw hole, and the second adjusting screw passes through the second annular slide and is threadedly connected to the corresponding second connecting screw hole.

7. The optical device dual-degree-of-freedom adjustment platform according to claim 4, characterized in that: The lengths of the multiple connecting rods are different, and an inclined end surface is provided at one end of the connecting rod away from the mounting seat. The inclined end surfaces of the ends of the connecting rods are located on the same plane, and an angle is formed between the plane and the mounting seat. The pitch adjustment portion is connected to the inclined end surfaces of the multiple connecting rods, so that when the center line connecting the front and rear ends of the heat protection cover 4 is parallel to the plane, the optical window faces the direction of the model to be tested.

8. The dual-degree-of-freedom adjustment platform for optical equipment according to claim 7, characterized in that: The inclined end surfaces of the plurality of connecting rods are connected to a connecting plate, and the pitch adjustment part is connected to the plurality of connecting rods through the connecting plate.

9. The optical device dual-degree-of-freedom adjustment platform according to claim 8, characterized in that: The pitch adjustment portion is detachably connected to the connecting plate via screws.

10. The optical device dual-degree-of-freedom adjustment platform according to claim 1, characterized in that: The sealing cover is also provided with an air inlet hole and an air outlet hole, wherein the air inlet hole is used to be connected to a cold air source, and the air outlet hole is used to be connected to an air extraction pump.

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