Multiplexed aircraft test microwave dark box

Abstract

The application provides a multiplexing aircraft test microwave dark box, which comprises a dark box body and a box support, the dark box body is detachably installed on the box support, a wave-absorbing material layer is arranged inside the dark box body, a microwave antenna structure is arranged on one side of the dark box body, an adapter is arranged on the other side of the dark box body for placing an aircraft seeker, and a baffle is detachably installed on the adapter of the dark box body; and the box support allows the dark box body to move up and down and / or move forward and backward. The baffle is detachably installed on the adapter of the dark box body through positioning screws, different diameters and different structures of aircrafts can be adapted by replacing the baffle, different baffle center openings can be designed according to the structure of the aircraft, different structure types of aircrafts can be matched, electromagnetic wave leakage in the dark box body can be reduced to the maximum extent, and the application has the advantages of high multiplexing, strong operability, low development cost and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of aircraft seeker testing devices, in particular to a multiplex aircraft testing microwave dark box. BACKGROUND

[0002] The microwave dark box functions to shield the external radiation of the high-frequency signals of the seeker and the environmental noise interference when the aircraft seeker is tested, and to detect and test the receiving and transmitting performance and the heading tracking stability of the seeker through the antenna inside the microwave dark box.

[0003] The Chinese patent application document with the publication number CN107884655A discloses a microwave dark box space attenuation calibration device and method, the microwave dark box has a signal input end face, a signal output end face and a space attenuation area, a transmitting waveguide antenna is arranged at the inner side of the shaft center of the signal input end face, the transmitting waveguide antenna is connected with a microwave signal generator through a microwave input cable arranged outside the signal input end face, an opening is arranged at the shaft center of the signal output end face, a standard gain antenna extends into the microwave dark box through the opening, the shaft center line of the standard gain antenna coincides with the center line of the space attenuation area, the receiving end face of the standard gain antenna is parallel to the dark box output end face, and the output end of the standard gain antenna is connected with the input end of a measuring receiver through a microwave output cable.

[0004] Since the structures and diameters of different aircrafts are different, the conventional microwave dark box design cannot adapt to different types of aircrafts, resulting in low multiplexability of the microwave dark box, high testing and developing cost, and inconvenient movement and adjustment of the microwave dark box in the prior art, which needs to be improved. SUMMARY

[0005] In view of the defects in the prior art, the purpose of the present application is to provide a multiplex aircraft testing microwave dark box.

[0006] According to the present application, a multiplex aircraft testing microwave dark box is provided, which comprises a dark box body and a box support, the dark box body is detachably installed on the box support, a wave-absorbing material layer is laid inside the dark box body, a microwave antenna structure is arranged on one side of the dark box body, an adapter for placing an aircraft seeker is arranged on the other side of the dark box body, and a baffle is detachably installed at the adapter of the dark box body, and the box support allows the dark box body to move up and down and / or move back and forth.

[0007] Preferably, the microwave antenna structure comprises a transmitting antenna and an antenna motion control mechanism for adjusting the transmitting antenna, and an antenna radio frequency cable interface is arranged outside the dark box body; the transmitting antenna is arranged inside the dark box body and connected with the antenna radio frequency cable interface through a short radio frequency cable.

[0008] Preferably, the antenna motion control mechanism comprises an outer ring plate and an inner ring plate, the outer ring plate is fixedly connected with the dark box body, the inner ring plate is installed in the outer ring plate and rotationally connected with the outer ring plate.

[0009] Preferably, a plurality of positioning screw holes are arranged at the outer edge of the inner ring plate in intervals, and a fixing bolt is arranged on the outer ring plate and threadedly matched with the positioning screw holes.

[0010] Preferably, a scale mark is arranged on the outer ring plate, and eight scale marks are arranged on the outer ring plate in uniform intervals around the central axis of the outer ring plate.

[0011] Preferably, the baffle plate is provided with an opening corresponding to the structure of the aircraft, and the baffle plate is detachably connected with the dark box body through a positioning screw.

[0012] Preferably, the bottom of the box support is provided with a moving wheel, the box support comprises a lifting platform, the lifting platform is provided with a sliding rail, the dark box body is slidably matched with the sliding rail, and a fastening connecting flange is arranged between the dark box body and the box support.

[0013] Preferably, the bottom of the box support is provided with a horizontal adjusting device, and one horizontal adjusting device is arranged at each corner of the box support.

[0014] Preferably, the horizontal adjusting device comprises a rotary lifting device.

[0015] Preferably, a bubble level is arranged on the box support.

[0016] Compared with the prior art, the present application has the following advantages:

[0017] 1、The present application can be used for different diameter and structure aircrafts by replacing the baffle plate, and the center opening of the baffle plate can be designed according to the structure of the aircraft to match different structure types of aircrafts and reduce electromagnetic wave leakage in the dark box to the greatest extent, and the present application has the advantages of high reusability, strong operability and low development cost.

[0018] 2、The application adjusts the pitch angle and polarization direction of the loudspeaker through the antenna motion control mechanism, and the antenna motion control mechanism has a positioning function, the device can be clamped when rotating 45° clockwise or counterclockwise, and can be adjusted according to the test needs, which is convenient for operators to use.

[0019] 3、The application adjusts the height and front and rear position of the box through the box support, which helps to improve the operability of the test. BRIEF DESCRIPTION OF DRAWINGS

[0020] Other features, objects and advantages of the application will become more apparent from the following detailed description of non-limiting embodiments, made with reference to the accompanying drawings:

[0021] Figure 1 It is mainly embodied in the front structure diagram of the microwave dark box.

[0022] Figure 2 It is mainly embodied in the left structure diagram of the microwave dark box.

[0023] Figure 3 It is mainly embodied in the right structure diagram of the microwave dark box.

[0024] Figure 4 It is mainly embodied in the overall structure diagram of the antenna motion control mechanism.

[0025] Figure 5 It is mainly embodied in the overall structure diagram of the baffle.

[0026] In the drawings:

[0027] Dark box body 1 Positioning screw 111

[0028] Adapter 12 Box support 2

[0029] Baffle 13 Moving wheel 21

[0030] Launch antenna 14 Lifting platform 22

[0031] Antenna motion control mechanism 15 Slide rail 23

[0032] Antenna RF cable interface 16 Rotating lifting device 24

[0033] Outer ring plate 17 Bubble level 25

[0034] Fixed bolt 18 Connection flange 26

[0035] Inner ring plate 19 Lifting car control device 27

[0036] Scale mark 110 DETAILED DESCRIPTION

[0037] The application will be described in detail below with reference to specific embodiments. The following examples will help those skilled in the art to further understand the application, but do not limit the application in any form. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the application. These are within the scope of the present application.

[0038] As shown in Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 , a multiplexing type aircraft test microwave dark box is provided according to the application, which comprises a dark box body 1 and a box support 2, and the dark box body 1 is detachably installed on the box support 2. A layer of wave-absorbing material is laid inside the dark box body 1, one side of the dark box body 1 is provided with a microwave antenna structure, the other side of the dark box body 1 is provided with an adapter 12 for placing an aircraft seeker, and a baffle 13 is detachably installed at the adapter 12 of the dark box body 1. The box support 2 allows the dark box body 1 to move up and down and / or move forward and backward.

[0039] Specifically, the dark box body 1 is mainly used to simulate a free space environment and reduce external electromagnetic and stray light interference. A high-performance microwave absorbing material is laid on the inner wall of the dark box body 1. The high-performance microwave absorbing material of the application can use polyurethane pyramidal wave-absorbing material.

[0040] The microwave antenna structure comprises a transmitting antenna 14 and an antenna motion control mechanism 15, the antenna motion control mechanism 15 is used to adjust the transmitting antenna 14, and an antenna RF cable interface 16 located outside the dark box body 1 is provided on the antenna motion control mechanism. The transmitting antenna 14 is arranged inside the dark box body 1, and the transmitting antenna 14 is connected with the antenna RF cable interface 16 through a short RF cable. It should be noted that the transmitting antenna 14 of the application adopts a small-caliber horn design, and is connected with the antenna RF cable interface 16 outside the box through a short RF cable. The antenna motion control mechanism 15 comprises a pitch mechanism and a rotating device, which can adjust the pitch angle and polarization direction of the horn, and the antenna motion control mechanism 15 has a positioning function, the device can be clamped by rotating 45° clockwise or counterclockwise, and can be adjusted in rotation according to the test needs, which is convenient for the operator to use.

[0041] More specifically, the antenna motion control mechanism 15 includes an outer circular plate 17 and an inner circular plate 19. The outer circular plate 17 is fixedly connected to the cabinet body 1 by screws. The inner circular plate 19 is installed in the outer circular plate 17 and is rotationally connected to the outer circular plate 17. The outer edge of the inner circular plate 19 is provided with a plurality of positioning screw holes. The outer circular plate 17 is provided with a fixing bolt 18 which is threadedly connected to the positioning screw holes. Preferably, eight positioning screw holes are provided at an interval of 45° on the outer edge of the inner circular plate 19. During adjustment, the inner circular plate 19 is rotated. When the positioning screw holes coincide with the fixing bolt 18, the fixing bolt 18 is tightened to fix the inner circular plate 19. After the fixing bolt 18 is loosened, the inner circular plate 19 can continue to rotate.

[0042] Further, a rotating handle is provided on the inner circular plate 19 to facilitate the rotation of the inner circular plate 19 by the staff. A scale mark 110 is provided on the outer circular plate 17. Eight scale marks 110 are uniformly and intervaliy provided around the central axis of the outer circular plate 17.

[0043] The baffle 13 is fixed to the adapter interface 12 of the cabinet body 1 and is replaceable. The size of the baffle 13 can be flexibly set according to the size of the adapter interface 12. By replacing the baffle 13, different diameters and different structures of the aircraft can be adapted. The baffle 13 is provided with an opening hole corresponding to the structure of the aircraft. The baffle 13 is detachably connected to the cabinet body 1 by positioning screws 111. Preferably, eight positioning screws 111 are uniformly distributed on a circular line with the center of the adapter interface 12 as the center. The baffle 13 can be rotated and fixed according to the testing needs. Different baffle 13 center openings can be designed according to the structure of the aircraft to match different structural types of aircraft and to minimize electromagnetic wave leakage in the cabinet body.

[0044] The cabinet support 2 mainly includes a sliding rail 23, a moving wheel 21, a horizontal adjustment device, a lifting platform 22 and a lifting vehicle control device 27. The bottom of the cabinet support 2 is provided with the moving wheel 21. The cabinet support 2 includes the lifting platform 22. The lifting platform 22 is provided with the sliding rail 23. The cabinet body 1 is slidably connected to the sliding rail 23. The cabinet body 1 and the cabinet support 2 are provided with a fastening connection flange 26. The moving wheel 21 includes four universal wheels to facilitate the flexible movement of the entire device. The sliding rail 23 supports the forward and backward movement of the cabinet body on the cabinet support 2. The lifting vehicle control device 27 can control the lifting of the lifting platform 22 to adjust the center height of the cabinet body.

[0045] The bottom of the box support 2 is provided with a horizontal adjusting device, and one horizontal adjusting device is arranged at each corner of the box support 2. A bubble level 25 is arranged on the box support 2. The horizontal position of the dark box body is conveniently adjusted. The horizontal adjusting device comprises a rotary lifting device 24. The rotary lifting device 24 of the application is a commonly used rotary lifting structure in the prior art. The leveling can be realized by adjusting the four rotary lifting devices 24 to make the bubble of the level be at the center. Compared with the prior art, the application has the advantages of high multiplicity, strong operability and low development cost.

[0046] During the microwave dark box test, the microwave dark box is adjusted to a horizontal state through the four rotary lifting devices 24, then the center height of the microwave dark box is adjusted and controlled by the lifting vehicle control device 27 to control the lifting platform 22 to match the height of the aircraft seeker, the baffle 13 matched with the aircraft seeker in diameter and structure is selected and installed outside the adapter interface 12 of the microwave dark box, finally the position of the dark box body is adjusted along the slide rail 23, so that the aircraft seeker is inserted into the opening of the baffle 13, and the height of the dark box body can be finely adjusted according to the actual situation, so that the fitting effect of the aircraft seeker inserted into the opening of the baffle 13 is improved. Through the adjustment of the box support 2 and the replacement of the baffles 13 of different opening types, the carrying and moving of the aircraft seeker can be reduced, and the test of aircrafts with different structures can be realized.

[0047] The design principles and advantages of the application are described above in combination with specific embodiments, and these descriptions only explain the design principles of the application, and cannot be explained as limitations on the protection scope of the application in any way. Based on the explanations herein, those skilled in the art can conceive the same function as the corresponding embodiments described in the application or obtain substantially the same embodiments, which will be included in the protection scope of the application.

[0048] In the description of the application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0049] The specific embodiments of the application are described above. It should be understood that the application is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essential content of the application. The embodiments of the application and the features in the embodiments can be arbitrarily combined with each other without conflict.

Claims

1. A reusable microwave anechoic chamber for testing aircraft, characterized in that, It includes a dark box body (1) and a box support (2), wherein the dark box body (1) is detachably mounted on the box support (2); The dark box body (1) is covered with a layer of absorbing material. A microwave antenna structure is provided on one side of the dark box body (1). An adapter (12) for placing the aircraft seeker head is provided on the other side of the dark box body (1). A baffle (13) can be detachably installed at the adapter (12) of the dark box body (1). The box support (2) allows the dark box body (1) to move up and down and / or move back and forth; The microwave antenna structure includes a transmitting antenna (14) and an antenna motion control mechanism (15). The antenna motion control mechanism (15) is used to adjust the transmitting antenna (14). The antenna motion control mechanism (15) is provided with an antenna radio frequency cable interface (16) located outside the dark box body (1). The transmitting antenna (14) is located inside the dark box body (1), and the transmitting antenna (14) is connected to the antenna radio frequency cable interface (16) through a short radio frequency cable; The antenna motion control mechanism (15) includes an outer ring plate (17) and an inner ring plate (19). The outer ring plate (17) is fixedly connected to the dark box body (1). The inner ring plate (19) is installed inside the outer ring plate (17) and is rotatably connected to the outer ring plate (17). The outer edge of the inner ring plate (19) is provided with a plurality of positioning screw holes at intervals, and the outer ring plate (17) is provided with fixing bolts (18), which are threadedly engaged with the positioning screw holes; The outer ring plate (17) is provided with scale markings (110); The baffle (13) is provided with openings corresponding to the structure of the aircraft, and the baffle (13) is detachably connected to the dark box body (1) by positioning screws (111).

2. The reusable aircraft testing microwave anechoic chamber as described in claim 1, characterized in that, The scale markings (110) are arranged in eight evenly spaced intervals around the central axis of the outer ring plate (17).

3. The reusable aircraft testing microwave anechoic chamber as described in claim 1, characterized in that, The bottom of the box support (2) is provided with a moving wheel (21). The box support (2) includes a lifting platform (22). The lifting platform (22) is provided with a slide rail (23). The dark box body (1) slides and cooperates with the slide rail (23). A fastening connection flange (26) is provided between the dark box body (1) and the box support (2).

4. The reusable aircraft testing microwave anechoic chamber as described in claim 1, characterized in that, The bottom of the box support (2) is provided with a horizontal adjustment device, and one horizontal adjustment device is provided at each of the four corners of the box support (2).

5. The reusable aircraft testing microwave anechoic chamber as described in claim 4, characterized in that, The leveling device includes a rotary lifting device (24).

6. The reusable aircraft testing microwave anechoic chamber as described in claim 1, characterized in that, A bubble level (25) is installed on the box support (2).

Images