Electromagnetic function test system

Abstract

The utility model discloses an electromagnetic function test system, include: both side's stand, the stand middle part is installed with the feed source installation platform through the lifting structure, two groups of feed source assembly are installed above the feed source installation platform, the feed source installation platform bottom has the wave absorbing background structure, the wave absorbing background structure middle part places the sample to be measured, the feed source installation platform realizes horizontal direction transverse movement through the translation structure, has the rotary structure in the feed source assembly, thereby realizes the measurement process realizes up and down movement, left and right movement and angle rotation conversion, solves the technical problem of the measurement error of the test system in the prior art is serious, cannot simultaneously compatible P, L wave band material test and high frequency microwave test and cannot achieve the comprehensive electromagnetic function material test analysis of multiple projects.

Description

Technical Field

[0001] This utility model belongs to the field of electromagnetic testing technology, and in particular relates to an electromagnetic function testing system. Background Technology

[0002] Current bow-type testing devices utilize arched, figure-7 shaped, or double-gate structures to perform material testing at a fixed height. The arched structure adjusts the angle and position of the feed antenna by adjusting the transmission link connecting to it. A significant drawback of this structure is that the overall arched frame and chain-like transmission link provide multi-directional high-scattering sources to the microwave test sample, greatly affecting testing accuracy and generating substantial errors at different incident angles. Due to these drawbacks, the bow-type testing system has been improved to a figure-7 or double-gate structure. This significantly reduces the structural weight of the arched frame and largely optimizes the electromagnetic interference caused by the frame and transmission structures in material reflectivity testing. However, this structure still has three drawbacks: First, the center point of the gantry is on the same horizontal plane as the test platform, resulting in a long feed distance. Especially for low-frequency materials, the large and heavy feed, coupled with the required long testing distance, puts pressure on the transmission gears and motor at the center, leading to a large deviation between the angle control system and the actual distance, resulting in serious testing errors. Secondly, excessive testing distance and feed weight exacerbate deformation of the structural profile, altering the feed test angle and significantly interfering with the consistency of test results for quarterly or annual samples. Thirdly, the switching motor in the dual-band test of this type of testing device is relatively close to the feed antenna, and the motor is a strong scattering source in microwave testing, affecting the testing environment and increasing feed coupling interference. Furthermore, the above testing devices cannot simultaneously meet the requirements for P-band and L-band material testing and high-frequency microwave testing. According to GJB 2038A 2011, "Test Method for Reflectivity of Radar Absorbing Materials," the bow-shaped method requires testing distances for different frequency bands, with low-frequency tests requiring significantly higher heights than high-frequency materials. However, the design of the above testing devices cannot accommodate changes in feed height, thus hindering compatibility with dual-band absorbing materials testing. Moreover, these devices can only perform single-item tests and cannot be extended to multi-item compatibility. The research and testing of electromagnetic materials often involves the electromagnetic parameters and other properties of absorbing and transmitting materials; none of the above devices can perform comprehensive electromagnetic functional material testing and analysis for multiple items. Utility Model Content

[0003] The purpose of this invention is to provide an electromagnetic function testing system that solves the technical problems of serious measurement errors, inability to simultaneously perform P- and L-band material testing and high-frequency microwave testing, and inability to perform comprehensive electromagnetic function material testing and analysis for multiple items in the existing technology.

[0004] The technical solution adopted by this utility model to solve its technical problem is:

[0005] An electromagnetic function testing system includes: two columns on both sides, a feed platform mounted on the middle of the columns via a lifting structure, two feed assemblies mounted above the feed platform, a background absorbing structure at the bottom of the feed platform, a sample to be tested placed in the middle of the background absorbing structure, the feed platform moving laterally in the horizontal direction via a translation structure, and the feed assembly having a rotation structure, thereby enabling vertical movement, horizontal movement, and angular rotation during the measurement process.

[0006] This utility model discloses an electromagnetic function testing system. The lifting structure includes a lifting servo motor, which is connected to a lifting transmission rod via a transmission structure. The two ends of the lifting transmission rod are connected to a lifting transmission belt via a transmission structure. The bottom of the lifting transmission belt is connected to the lower part of the column via a tensioning mechanism. The two ends of the feed installation platform are connected to the middle of the lifting transmission belt at corresponding positions.

[0007] This utility model discloses an electromagnetic function testing system, wherein a vertical lifting guide rod is provided inside the column, and the feed source mounting platform is mounted on the lifting guide rod. The feed source mounting platform is guided to move up and down by the lifting guide rod.

[0008] This utility model discloses an electromagnetic function testing system. The feed assembly includes a feed mounting base, the bottom of which is slidably connected to a translation guide rail. The translation guide rail is laid along the length of the feed mounting platform. The feed mounting base is connected to a translation structure, thereby realizing the horizontal movement of the feed mounting base.

[0009] This utility model discloses an electromagnetic function testing system, wherein an anti-interference antenna bracket is installed on the vertical side of the feed mounting base, the anti-interference antenna bracket is arranged in a horizontal direction, a rotary motor is provided between one end of the anti-interference antenna bracket and the feed mounting base, and a broadband horn antenna is hinged to the other end of the anti-interference antenna bracket.

[0010] The present invention relates to an electromagnetic function testing system, wherein an antenna angle control cylinder is provided at the hinge joint between the broadband horn antenna and the anti-interference antenna bracket.

[0011] The present invention relates to an electromagnetic function testing system, wherein a low-frequency log-periodic antenna is provided on the top of the broadband horn antenna, and the low-frequency log-periodic antenna is connected to an anti-interference antenna bracket via a bracket.

[0012] The present invention relates to an electromagnetic function testing system, wherein the translation structure is a transmission structure consisting of a belt and a motor, and the translation structures of the two sets of feed assemblies are independent of each other.

[0013] The present invention relates to an electromagnetic function testing system in which two sets of translational structures are arranged vertically in an alternating manner, and their opposing positions are staggered vertically and tensioned by a vertical test stroke frame and connected to a feed source mounting platform.

[0014] The present invention discloses an electromagnetic function testing system, wherein the absorbing background structure comprises a plurality of absorbing cone materials, a testing platform is provided in the middle of the plurality of absorbing cone materials, and the bottom of the testing platform is supported by a wave-transparent bracket.

[0015] The beneficial effects of this invention are as follows: An electromagnetic function testing system is proposed. By setting up parallel feed sources and test platforms, the center point of the gantry and the center point of the test platform can be collinear, ensuring the testing accuracy at various test angles. Belt drive and the placement of lifting structures on both sides of the feed source mounting platform reduce stress concentration and facilitate adjustment of the feed source mounting platform's height, thereby adjusting the test height. Two feed assemblies are equipped with independent translation structures, allowing for left and right translation to adjust the incident angle for reflectivity testing. Furthermore, by setting up a test travel frame and staggering the two translation structures, single-station radar wave testing can be performed on either side of the feed antenna in the vertical direction. A rotary motor controls the left and right feed antenna assemblies. The device features a 360-degree directional reversal. During reflectivity testing, the antenna angles on both sides can be adjusted based on the angle between the vertical test antenna and the horizontal test plane, and can be adjusted to be parallel to the horizontal direction for free-space testing. By setting up anti-interference antenna brackets to isolate the broadband horn antenna and low-frequency log-periodic antenna from the overall facility, interference from surrounding electromagnetic scattering sources can be reduced when testing reflectivity and bid rate. An antenna angle control cylinder allows for 90-degree switching of the antenna using air pressure, enabling rapid conversion between low-frequency and high-frequency testing under any testing method. The entire system is controlled by an electromechanical control system, allowing for multi-axial linkage testing along the Z, X, and R axes, and can be combined with vector network analysis to meet diverse testing needs. Attached Figure Description

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

[0017] Figure 1 This is a schematic diagram of the present invention;

[0018] Figure 2 This is a partial enlarged view of the present invention;

[0019] Figure 3 This is another schematic diagram of the present invention. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0021] like Figure 1-3 As shown, an electromagnetic function testing system includes: two columns 100 on both sides, a feed platform 200 mounted on the middle of the columns 100 via a lifting structure 400, two sets of feed assemblies 500 mounted above the feed platform 200, a wave-absorbing background structure 300 at the bottom of the feed platform 200, a sample to be tested placed in the middle of the wave-absorbing background structure 300, the feed platform 200 achieving horizontal movement via a translation structure 600, and the feed assembly 500 having a rotation structure, thereby enabling up-down movement, left-right movement, and angle rotation transformation during the measurement process.

[0022] It should be noted that the lifting structure 400 is supported by a support structure set at the top. The support structure, the feed installation platform 200 and the column 100 are treated with a wave-absorbing coating to form a low-scattering bracket, which meets the test background of the free space method. The control of each component is a unified control of the whole electromechanical system. Its control principle is a conventional technology and will not be described in detail here.

[0023] In a preferred embodiment, the lifting structure 400 includes: a lifting servo motor 410, which is connected to a lifting transmission rod 420 via a transmission structure. The two ends of the lifting transmission rod 420 are connected to a lifting transmission belt 430 via a transmission structure. The bottom of the lifting transmission belt 430 is connected to the lower part of the column 100 via a tensioning mechanism. The two ends of the feed mounting platform 200 are connected to the middle of the corresponding lifting transmission belt 430. Simply put, the motor drives a transmission shaft, and the two ends of the transmission shaft are tensioned with transmission belts, which drive the lifting of the feed mounting platform 200.

[0024] In a preferred embodiment, a vertical lifting guide rod 440 is provided inside the column 100, and the feed installation platform 200 is mounted on the lifting guide rod 440. The feed installation platform 200 is guided to move up and down by the lifting guide rod 440, thereby achieving a stable lifting effect.

[0025] In a preferred embodiment, the feed assembly 500 includes a feed mounting base 510, the bottom of which is slidably connected to a translation rail 210. The translation rail 210 is laid along the length of the feed mounting platform 200. The feed mounting base 510 is connected to a translation structure 600, thereby enabling horizontal movement of the feed mounting base 510. This structure allows for left and right translation of the feed assembly 500, and the two feed assemblies 500 can be controlled independently. This allows the two sets of feed antennas to adjust the incident angle for reflectivity testing by moving them left and right along the X-axis.

[0026] In a preferred embodiment, an anti-interference antenna bracket 520 is installed on the vertical side of the feed mounting base 510. The anti-interference antenna bracket 520 is arranged in a horizontal direction. A rotary motor 530 is provided between one end of the anti-interference antenna bracket 520 and the feed mounting base 510. A broadband horn antenna 560 is hinged to the other end of the anti-interference antenna bracket 520.

[0027] In a preferred embodiment, an antenna angle control cylinder 550 is provided at the hinge joint between the broadband horn antenna 560 and the anti-interference antenna bracket 520.

[0028] In a preferred embodiment, a low-frequency log-periodic antenna 570 is provided on the top of the broadband horn antenna 560, and the low-frequency log-periodic antenna 570 is connected to the anti-interference antenna bracket 520 through a bracket.

[0029] The 1-18GHz broadband horn antenna 560 operates at a frequency of 1-18GHz, and the low-frequency log-periodic antenna 570 operates at a frequency of 0.1-6GHz. Both are separated from the overall facility by an anti-interference antenna bracket 520, which reduces interference from surrounding electromagnetic scattering sources when measuring reflectivity and bid rate.

[0030] In a preferred embodiment, the translation structure 600 is a transmission structure combining a belt and a motor, and the translation structures 600 of the two sets of feed assemblies 500 are independent of each other.

[0031] In a preferred embodiment, the two sets of translation structures 600 are arranged vertically in an alternating manner, and their opposite positions are tensioned by a vertical test stroke frame 610 and connected to the feed source mounting platform 200.

[0032] In simple terms, the belts of the two sets of translation structures 600 are horizontally staggered, and their endpoints both exceed the midpoint of the opposite end and the length of the feed mounting platform 200. This allows each feed to reach the midpoint of the feed mounting platform 200, thus enabling single-station radar wave testing in a 90-degree perpendicular direction to the test platform.

[0033] In a preferred embodiment, the microwave absorbing background structure 300 includes a plurality of microwave absorbing cone materials 310, and a test platform 320 is provided in the middle of the plurality of microwave absorbing cone materials 310. The bottom of the test platform 320 is supported by a wave-transmitting bracket 330.

[0034] The test background consists of a reflectivity test platform 320 and a rigid wave-transmitting bracket 330 forming the center of the reflectivity sample platform plane. The low-decibel scattering background is formed by a wave-absorbing cone material 310 with a height of 700mm. The electromagnetic background is between -40 and -60 decibels, which meets the requirements of the reflectivity test environment.

[0035] In the description of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0036] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0037] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. An electromagnetic function testing system, characterized in that, include: The two sides are upright columns (100). A feed mounting platform (200) is installed in the middle of the upright column (100) through a lifting structure (400). Two sets of feed assemblies (500) are installed above the feed mounting platform (200). The bottom of the feed mounting platform (200) has a wave-absorbing background structure (300). The sample to be tested is placed in the middle of the wave-absorbing background structure (300). The feed mounting platform (200) can move horizontally in the horizontal direction through a translation structure (600). The feed assembly (500) has a rotation structure, so that the measurement process can realize up and down movement, left and right movement and angle rotation transformation.

2. The electromagnetic function testing system according to claim 1, characterized in that, The lifting structure (400) includes: a lifting servo motor (410), which is connected to a lifting transmission rod (420) through a transmission structure. The two ends of the lifting transmission rod (420) are connected to the lifting transmission belt (430) through a transmission structure. The bottom of the lifting transmission belt (430) is connected to the lower part of the column (100) through a tensioning mechanism. The two ends of the feed installation platform (200) are connected to the middle of the corresponding lifting transmission belt (430).

3. The electromagnetic function testing system according to claim 2, characterized in that, The column (100) is provided with a vertical lifting guide rod (440), and the feed installation platform (200) is fitted on the lifting guide rod (440). The feed installation platform (200) is guided to move up and down by the lifting guide rod (440).

4. The electromagnetic function testing system according to claim 1, characterized in that, The feed assembly (500) includes a feed mounting base (510), the bottom of which is slidably connected to a translation guide rail (210). The translation guide rail (210) is laid along the length of the feed mounting platform (200). The feed mounting base (510) is connected to a translation structure (600) to realize the horizontal movement of the feed mounting base (510).

5. The electromagnetic function testing system according to claim 4, characterized in that, An anti-interference antenna bracket (520) is installed on the vertical side of the feed mounting base (510). The anti-interference antenna bracket (520) is set in the horizontal direction. A rotary motor (530) is set between one end of the anti-interference antenna bracket (520) and the feed mounting base (510). A broadband horn antenna (560) is hinged to the other end of the anti-interference antenna bracket (520).

6. The electromagnetic function testing system according to claim 5, characterized in that, An antenna angle control cylinder (550) is provided at the hinge of the broadband horn antenna (560) and the anti-interference antenna bracket (520).

7. The electromagnetic function testing system according to claim 6, characterized in that, A low-frequency log-periodic antenna (570) is provided on the top of the broadband horn antenna (560), and the low-frequency log-periodic antenna (570) is connected to the anti-interference antenna bracket (520) through a bracket.

8. The electromagnetic function testing system according to claim 7, characterized in that, The translation structure (600) is a transmission structure combining a belt and a motor, and the translation structures (600) of the two sets of feed assemblies (500) are independent of each other.

9. The electromagnetic function testing system according to claim 8, characterized in that, The two sets of translation structures (600) are arranged vertically and staggered. They are staggered at opposite ends and tensioned by a vertical test stroke frame (610) and connected to the feed installation platform (200).

10. The electromagnetic function testing system according to claim 1, characterized in that, The absorbing background structure (300) includes a plurality of absorbing cone materials (310), and a test platform (320) is provided in the middle of the plurality of absorbing cone materials (310). The bottom of the test platform (320) is supported by a wave-transmitting bracket (330).

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