Modularized microwave camera obscura

Abstract

The utility model discloses a modularized microwave camera obscura which comprises a camera obscura body and an antenna installation support, the antenna installation support is arranged in the camera obscura body and used for installing an antenna, and the antenna installation support is a three-axis linkage mechanism and can adjust the position of the antenna in the vertical direction, the transverse direction and the longitudinal direction. The camera obscura body is composed of a plurality of module box bodies which are detachably communicated, each module box body is provided with a box body frame, shielding plates and wood plates, the box body frames are constructed by plastic-wood profiles, the outer walls of the box body frames except the communication sides are all covered with the shielding plates, the inner walls of the box body frames except the communication sides are all covered with the wood plates, and the shielding plates are arranged on the outer walls of the box body frames. The inner side of the wood board is covered with a wave-absorbing material; a sliding supporting assembly is arranged at the bottom of each module box body and used for moving, positioning and supporting the module box bodies. The modularized microwave camera obscura provided by the utility model is installed in a modularized manner and is light in weight, the box body is convenient to transport, and an internal tested antenna can be flexibly adjusted.

Description

Technical Field

[0001] This utility model relates to a modular microwave anechoic chamber, belonging to the field of microwave antenna testing technology. Background Technology

[0002] A microwave anechoic chamber, also known as an absorbing anechoic chamber, is a miniaturized application of microwave anechoic chambers and is an indispensable laboratory tool for testing the performance of small-sized radar antennas. The anechoic chamber primarily absorbs and shields electromagnetic waves through absorbing materials and a shielded enclosure. After entering the absorbing material, electromagnetic waves undergo multiple reflections, dissipating their energy; the shielded enclosure, a metallic space, isolates external electromagnetic interference.

[0003] The current conventional darkroom is a box placed indoors (such as...). Figure 1 The enclosure frame is constructed from aluminum alloy profiles or welded iron pipes, and the surface is covered with sheet metal parts. The inner walls are all covered with absorbing material, which is generally a pyramidal polyurethane absorbing sponge with a wavelength greater than that of the incident wave. The enclosure is usually equipped with a metal bracket for fixing the antenna under test. The position of the transmitting antenna relative to the receiving antenna is manually adjusted by screws to achieve signal acquisition.

[0004] The conventional microwave anechoic chambers currently on the market have the following disadvantages:

[0005] 1. Some of the enclosure frames of the darkroom are welded from sheet metal parts, which is time-consuming and expensive to process; others are built with aluminum alloy profiles, which have poor electromagnetic wave shielding effect.

[0006] 2. Due to its large size, it can only be fixed in a specific indoor area and is not convenient to transport to an outdoor environment;

[0007] 3. The internal antenna mounting bracket has a simple structure and requires manual adjustment, making it inconvenient to move and adjust it in a timely manner according to the actual situation during installation and testing. Utility Model Content

[0008] To solve the above-mentioned technical problems, this utility model provides a microwave anechoic chamber with modular installation, convenient box transportation, and flexible adjustment of the internal antenna under test.

[0009] To achieve the above-mentioned technical objectives and effects, this application provides the following technical solution:

[0010] A modular microwave anechoic chamber includes a chamber body and an antenna mounting bracket. The antenna mounting bracket is housed within the chamber body for antenna installation and is a three-axis linkage mechanism capable of vertically, horizontally, and longitudinally adjusting the antenna's position. The chamber body comprises multiple detachable and interconnected modular boxes. Each modular box has a frame, a shielding plate, and wooden boards. The frame is constructed from wood-plastic composite profiles. The shielding plate covers the outer walls of the frame except for the connecting sides, and the wooden boards cover the inner walls of the frame except for the connecting sides. The inner sides of the wooden boards are covered with microwave absorbing material. Each modular box has a sliding support assembly at its bottom for movement and positioning support.

[0011] Preferably, two adjacent module housings are fixedly connected by an aluminum alloy connecting plate and screws on the connecting side.

[0012] Preferably, each of the shielding plates located around the perimeter of the module housing is hinged with a shielding door, and the shielding plate is provided with a latch to restrict the opening and closing of the shielding door.

[0013] Furthermore, both the shielding plate and the shielding door are thin aluminum alloy sheet metal plates with conductive anodizing treatment on the surface.

[0014] Preferably, the antenna mounting bracket includes an X-axis electric linear slide, a Y-axis electric linear slide, and a Z-axis electric linear slide. The guide slider of the Z-axis electric linear slide has three antenna mounting positions on its sides for mounting the transmitting antenna and driving its vertical movement. The Z-axis electric linear slide is mounted on the guide slider of the X-axis electric linear slide and drives the transverse movement of the transmitting antenna. The X-axis electric linear slide is mounted on the guide slider of the Y-axis electric linear slide and drives the longitudinal movement of the transmitting antenna.

[0015] Preferably, the sliding support assembly includes a support frame and casters with feet. The support frame is detachably mounted on the bottom of the housing frame, and multiple casters with feet are provided and distributed on the bottom of the support frame.

[0016] The modular microwave anechoic chamber provided by this utility model has the following advantages:

[0017] 1. In this utility model, the frame of the darkroom body is constructed using wood-plastic composite profiles, which are lightweight and easy to transport; they are compatible with common screw fasteners and can be modularly installed for convenience. Furthermore, the material possesses non-metallic properties, effectively reducing energy reflection caused by metal exposure to the electromagnetic wave environment inside the enclosure.

[0018] 2. In this utility model, the modular box of the dark box body is composed of multiple boxes with universal casters, which can be quickly disassembled. After disassembly, the volume is small, which is convenient for transportation to other units or outdoor environments for testing.

[0019] 3. In this utility model, the internal antenna mounting bracket innovatively adopts an electric linear slide to adjust the distance between the three coordinate axes of the antenna under test. Engineers can move and adjust it at any time outside the dark box body according to the actual situation during installation and testing. The slide is similar in shape to a profile, which makes the antenna installation adaptable and can be flexibly deployed on all sides of the slide. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the cross-sectional structure of a conventional microwave anechoic chamber;

[0021] Figure 2 A schematic diagram of the structure of a modular microwave anechoic chamber provided by this utility model;

[0022] Figure 3 An exploded structural diagram of a modular microwave anechoic chamber provided by this utility model;

[0023] Figure 4 This is a partial schematic diagram illustrating the structure of the microwave absorbing material inside the module box, which is the main feature of this embodiment.

[0024] Figure 5a A schematic diagram of the profiles constituting the box frame of this utility model. Figure 1 ;

[0025] Figure 5b Schematic diagram of the profiles constituting the box frame of this utility model Figure 2 ;

[0026] In the picture:

[0027] 1-Dark box body; 11-Module box; 111-Box frame; 112-Shielding plate; 113-Wooden board; 2-Antenna mounting bracket; 21-X-axis electric linear slide; 22-Y-axis electric linear slide; 23-Z-axis electric linear slide; 3-Aluminum alloy connecting plate; 4-Sliding support assembly; 41-Support frame; 42-Universal casters; 5-Shielding door; 6-Absorbing material. Detailed Implementation

[0028] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0029] Reference Figures 2-5b A modular microwave anechoic chamber includes a chamber body 1 and an antenna mounting bracket 2. The antenna mounting bracket 2 is installed inside the chamber body 1 for antenna installation. The antenna mounting bracket 2 is a three-axis linkage mechanism that can adjust the position of the antenna vertically, horizontally and longitudinally, and can move and adjust the antenna position in a timely manner according to the actual situation during installation and testing.

[0030] The main body of the darkroom 1 consists of multiple detachable and interconnected modular boxes 11. Each modular box 11 has a box frame 111, a shielding plate 112, and wooden boards 113. The box frame 111 is constructed of wood-plastic composite profiles with cross-sections using commercially available 30×30, 40×40, and 40×80 aluminum profiles. This is existing technology and will not be elaborated further. It is compatible with commonly used fasteners such as screws and spring nuts, facilitating assembly. Except for the connecting side, the outer wall of the box frame 111 is covered with screws for installation. The enclosure is equipped with a shielding plate 112 for shielding against external electromagnetic interference. Except for the inner wall of the connecting side, the frame 111 is covered with wooden boards 113 by screws to shield the metal. The inner side of the wooden boards 113 is covered with a wave-absorbing material 6, which is preferably a pyramidal polyurethane wave-absorbing sponge to minimize the reflection of microwave signals. Two adjacent modular enclosures 11 are fixedly connected by aluminum alloy connecting plates 3 arranged on the connecting side and screws. In this embodiment, the dark box body 1 is preferably assembled from two modular enclosures 11.

[0031] Antenna mounting bracket 2 is installed in one of the module housings 11. Antenna mounting bracket 2 includes an X-axis motorized linear slide 21, a Y-axis motorized linear slide 22, and a Z-axis motorized linear slide 23. At least one set of each of the X-axis, Y-axis, and Z-axis motorized linear slides 21 and 22 is installed and connected to external control equipment. The Z-axis motorized linear slide 23 provides antenna mounting positions on three sides, except for the side with the linear guide rail, for mounting transmitting antennas and improving the compatibility of various antenna installations. Simultaneously, the Z-axis motorized linear slide... The linear slide 23 drives the vertical movement of the transmitting antenna. The Z-axis electric linear slide 23 is mounted on the guide slider of the X-axis electric linear slide 21, and drives the lateral movement of the transmitting antenna through the X-axis electric linear slide 21. The X-axis electric linear slide 21 is mounted on the guide slider of the Y-axis electric linear slide 22, and drives the longitudinal movement of the transmitting antenna through the Y-axis electric linear slide 22. The Y-axis electric linear slide 22 is mounted on the inner wall of the module housing 11. In this embodiment, the installation and application of the electric linear slide is existing technology and will not be described in detail. The cross-section of the guide slider is similar to that of the profile.

[0032] Another module housing 11 houses a receiving antenna (not shown in the figure). The receiving antenna can be directly mounted inside module housing 11 or installed using the same antenna mounting bracket 2. The receiving antenna receives the radio frequency (RF) signal emitted by the transmitting antenna and outputs the signal via an RF cable to an external acquisition device for detection and analysis; details will not be elaborated upon here. By controlling the motors of the three sets of electric linear slides, engineers can easily adjust the attitude of the transmitting antenna (antenna under test) from outside the dark chamber at any time, ensuring the relative positional relationship between the receiving and transmitting antennas and maximizing the received signal strength.

[0033] Reference Figure 2 and Figure 3 Each module box 11 is equipped with a sliding support assembly 4 at the bottom for moving and positioning support of the module box 11. The module box 11 can be disassembled during transportation, which improves the flexibility and convenience of transportation to the field or other places.

[0034] The sliding support assembly 4 includes a support frame 41 and casters 42. The support frame 41 is detachably installed at the bottom of the housing frame 111 by screws. The support frames 41 at the bottom of two adjacent module housings 11 are connected and fixed by connecting plates and screws to further ensure the overall connection stability of the dark box body 1. Multiple casters 42 are installed and distributed at the bottom of the support frame 41. The support frame 41 can be any shape. In this embodiment, the support frame 41 is preferably a square frame. The casters 42 are preferably four casters distributed at the four corners of the support frame 41. The casters 42 are movable wheels with feet, which are existing technology and will not be described in detail. They facilitate movement and adjustment of the horizontal height.

[0035] Reference Figure 2 and Figure 3 Shielding doors 5 are hinged to the shielding plates 112 around the module housing 11. The shielding plates 112 are equipped with latches that restrict the opening and closing of the shielding doors 5. Both the shielding plates 112 and the shielding doors 5 are thin aluminum alloy sheet metal plates with conductive anodizing treatment. The shielding plates 112 and the shielding doors 5 can also be covered with wooden boards 113 and wave-absorbing materials 6 with the same structure as those on the module housing 11 to shield external electromagnetic interference as much as possible. The shielding doors 5 are designed in all directions to facilitate viewing the internal situation during test intervals and to visually observe the adjustment position of the internal antennas.

[0036] The above description is merely a preferred embodiment of this utility model and is not intended to limit this utility model in any form or substance. It should be noted that those skilled in the art can make various improvements and additions without departing from this utility model, and these improvements and additions should also be considered within the protection scope of this utility model. Any modifications, alterations, and equivalent changes made by those skilled in the art without departing from the spirit and scope of this utility model using the disclosed technical content are equivalent embodiments of this utility model. Furthermore, any modifications, alterations, and evolutions made to the above embodiments based on the essential technology of this utility model are still within the scope of the technical solution of this utility model.

Claims

1. A modular microwave dark box, characterized in that, The utility model provides a kind of antenna installation box, including dark box body (1) and antenna installation support (2), antenna installation support (2) is set in dark box body (1) for the installation of antenna, antenna installation support (2) is three-axis linkage mechanism and the position of antenna can be adjusted vertically, transversely and longitudinally;The dark box body (1) is composed of multiple detachable communication module box (11), and the module box (11) has a box frame (111), a shielding plate (112) and a wooden board (113), the box frame (111) is built by plastic wood material section, and the shielding plate (112) is covered on the outer wall of the communication side of the box frame (111), and the wooden board (113) is covered on the inner wall of the communication side of the box frame (111), and the inside of the wooden board (113) is covered with a wave-absorbing material (6);Each module box (11) is provided with a sliding support assembly (4) at the bottom for moving and positioning support of the module box (11).

2. A modular microwave dark box according to claim 1, wherein, Two adjacent module boxes (11) are fixedly connected by an aluminum alloy connecting plate (3) and a screw on the connecting side.

3. A modular microwave dark box as claimed in claim 1, wherein, The shielding door (5) is hingedly arranged on the shielding plate (112) arranged around the module box (11), and a lock catch is arranged on the shielding plate (112) to limit the opening and closing of the shielding door (5).

4. A modular microwave dark box according to claim 3, wherein, The shielding plate (112) and the shielding door (5) are both aluminum alloy sheet metal plates with conductive oxidation treatment on the surface.

5. A modular microwave dark box according to claim 1, wherein, The antenna installation support (2) includes an X-axis electric linear slide (21), a Y-axis electric linear slide (22) and a Z-axis electric linear slide (23), the guiding block of the Z-axis electric linear slide (23) is provided with three antenna installation positions on the side surface for installing a transmitting antenna and driving the vertical movement of the transmitting antenna, the Z-axis electric linear slide (23) is arranged on the guiding block of the X-axis electric linear slide (21), the X-axis electric linear slide (21) drives the horizontal movement of the transmitting antenna, and the X-axis electric linear slide (21) is arranged on the guiding block of the Y-axis electric linear slide (22), the Y-axis electric linear slide (22) drives the longitudinal movement of the transmitting antenna.

6. A modular microwave dark box according to claim 1, wherein, The sliding support assembly (4) includes a support frame (41) and a foot universal wheel (42), the support frame (41) is detachably arranged at the bottom of the box frame (111), and the foot universal wheel (42) is provided with a plurality of foot universal wheels arranged at the bottom of the support frame (41).

Images