Electromagnetic function test system

Abstract

The invention discloses an electromagnetic function test system which comprises stand columns on two sides, a feed source mounting platform is mounted in the middle of the stand columns through a lifting structure, two feed source assemblies are mounted above the feed source mounting platform, a wave-absorbing background structure is arranged at the bottom of the feed source mounting platform, a sample to be tested is placed in the middle of the wave-absorbing background structure, and the wave-absorbing background structure is connected with the feed source mounting platform. The feed source mounting platform realizes transverse movement in the horizontal direction through a translation structure, and the feed source assembly is provided with a rotating structure, so that up-down movement, left-right movement and angle rotation conversion in the measurement process are realized; the technical problems that a test system in the prior art is serious in measurement error, cannot be compatible with P and L wave band material tests and high-frequency microwave tests at the same time and cannot achieve multi-project comprehensive electromagnetic function material test analysis are solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of electromagnetic testing, and particularly relates to an electromagnetic function testing system. Background Art

[0002] The current bow method testing device is a structure of an arch frame, a "7"-shaped structure, or a double-door structure for testing materials at a fixed height. The arch frame structure adjusts the angle and position of the feed source by adjusting the conveyor belt connecting the feed source antenna. The major drawback of this structure is that the overall arch structure frame and the chain-type conveyor belt will provide a multi-directional angle high-scattering source for the microwave test sample, greatly affecting the test accuracy and generating large errors during the test at different incident angles. Due to the above drawbacks, the bow method testing system has been improved into a "7"-shaped or double-door testing structure. This greatly reduces the structural weight of the arch frame and optimizes to a large extent the electromagnetic interference effects caused by the frame structure and the transmission structure on the material reflectivity test. However, this structure still has three drawbacks. One is that the center point of the gantry of this structure is on the same horizontal plane as the test platform, and the test feed source is far away. Especially for the test of materials with a relatively low frequency, the test feed source is large and heavy, and the test requires a long distance. This brings pressure to the load of the drive gear and motor of the center of the circle, resulting in a large deviation between the angle control system and the actual situation, leading to serious errors in the test. Second, the too long test distance and the weight of the feed source will exacerbate the deformation of the mechanism profiles, resulting in a change in the test angle of the feed source, and the consistency of the test results of the test samples per quarter or per year is greatly interfered. Third, the conversion motor for dual-band testing of this type of testing device is relatively close to the feed source antenna, and the motor is a strong scattering source in microwave testing, which will affect the test environment and increase the coupling interference of the feed source. There is also a point that the above testing device cannot achieve, that is, it cannot be compatible with the test of P and L band materials and high-frequency microwave testing at the same time. Because according to the requirements of different frequency band test distances in the bow method test in GJB 2038A 2011, "Test Method for Reflectivity of Radar Absorbing Materials", the test height of the low frequency is much higher than that of the high-frequency materials. However, the design of the above testing devices cannot complete the height change of the feed source, so it cannot be compatible with the test of dual-band absorbing materials. And the above devices can only complete single-item tests and cannot be extended to multi-item compatibility. The research and development tests of electromagnetic materials often accompany the electromagnetic parameters and other performances of absorbing and transmitting materials at the same time. The above devices cannot perform comprehensive electromagnetic function material tests and analyses of multiple items. Summary of the Invention

[0003] The purpose of the present invention is to provide an electromagnetic function testing system to solve the technical problems of serious measurement errors in the existing testing system, inability to be compatible with the test of P and L band materials and high-frequency microwave testing at the same time, and inability to perform comprehensive electromagnetic function material tests and analyses of multiple items.

[0004] The technical solution adopted by the present invention to solve its technical problems is as follows: An electromagnetic function testing system, comprising: columns on both sides, a feed source mounting platform is installed in the middle of the columns through a lifting structure, two groups of feed source assemblies are installed above the feed source mounting platform, an absorbing background structure is provided at the bottom of the feed source mounting platform, a sample to be tested is placed in the middle of the absorbing background structure, the feed source mounting platform realizes horizontal lateral movement through a translation structure, and a rotating structure is provided in the feed source assembly, so as to realize up and down movement, left and right movement and angular rotation transformation during the measurement process.

[0005] In the electromagnetic function testing system of the present invention, the lifting structure comprises: a lifting servo motor, the lifting servo motor is connected with a lifting transmission rod through a transmission structure, both ends of the lifting transmission rod are transmitted with a lifting transmission belt through a transmission structure, the bottom of the lifting transmission belt is connected with the lower part of the column through a tensioning mechanism, and both ends of the feed source mounting platform are connected with the middle parts of the corresponding lifting transmission belts.

[0006] In the electromagnetic function testing system of the present invention, a vertically arranged lifting guide rod is arranged in the column, the feed source mounting platform is sleeved on the lifting guide rod, and the feed source mounting platform moves up and down and is guided by the lifting guide rod.

[0007] In the electromagnetic function testing system of the present invention, the feed source assembly comprises a feed source mounting base, the bottom of the feed source mounting base is slidably connected with a translation guide rail, the translation guide rail is laid along the length direction of the feed source mounting platform, and the feed source mounting base is connected with the translation structure, so as to realize the horizontal movement of the feed source mounting base.

[0008] In the electromagnetic function testing system of the present invention, an anti-interference antenna bracket is installed on the vertical side surface of the feed source mounting base, the anti-interference antenna bracket is arranged horizontally, a rotating motor is arranged between one end of the anti-interference antenna bracket and the feed source mounting base, and a broadband horn antenna is hinged to the other end of the anti-interference antenna bracket.

[0009] In the electromagnetic function testing system of the present invention, an antenna angle control cylinder is arranged at the hinged part of the broadband horn antenna and the anti-interference antenna bracket.

[0010] In the electromagnetic function testing system of the present invention, a low-frequency log-periodic antenna is arranged at the top of the broadband horn antenna, and the low-frequency log-periodic antenna is connected with the anti-interference antenna bracket through a bracket.

[0011] In the electromagnetic function testing system of the present invention, the translation structure is a transmission structure combined with a belt and a motor, and the translation structures of the two groups of feed source assemblies are independent of each other.

[0012] An electromagnetic function test system of the present invention, wherein two sets of the translation structures are arranged vertically and staggeredly, and their facing parts are arranged vertically and staggeredly, tensioned by a vertical test travel frame and connected to a feed source installation platform.

[0013] An electromagnetic function test system of the present invention, wherein the microwave absorption background structure includes a plurality of microwave absorption cone materials, a test platform is arranged in the middle of the plurality of microwave absorption cone materials, and the bottom of the test platform is supported by a microwave transmission support.

[0014] The beneficial effects of the present invention are as follows: An electromagnetic function test system is proposed. By setting a feed source and a test platform that are parallel to each other, the center point of the gantry and the center point of the test platform can be collinear, ensuring the test accuracy at various test angles; by using belt drive and arranging the lifting structure on both sides of the feed source installation platform, stress concentration can be reduced while facilitating the adjustment of the height of the feed source installation platform to adjust the test height; two sets of feed source assemblies are provided with independent translation structures, which can be translated left and right to adjust the incident angle of the reflectivity test. And by setting a test travel frame and arranging two sets of translation structures staggeredly, the feed source antenna on any side can perform the test of the radar wave test project of a single station in the vertical direction; by setting a rotating motor, the feed source antenna groups on the left and right can be controlled to perform a 360-degree direction reversal. When testing the reflectivity, according to the included angle between the vertical test antenna and the vertical angle of the test horizontal plane, the angles of the antennas on both sides can be adjusted, and they can be adjusted to be parallel to the horizontal direction for free space method testing; by setting an anti-interference antenna support, the broadband horn antenna and the low-frequency log-periodic antenna are separated from the overall facility device, and interference from surrounding electromagnetic environment scatter sources can be reduced during reflectivity and bid rate tests; by setting an antenna angle control cylinder, the antenna can be switched by 90 degrees through air pressure to achieve rapid conversion between low-frequency and high-frequency tests under any test method; the entire set of equipment is controlled by a set of electromechanical control system, and multi-axial linkage tests of the Z, X, and R axes can be performed according to test requirements, and diversified test requirements can be met in cooperation with a vector network analyzer. Description of the Drawings

[0015] The present invention will be further described below in conjunction with the drawings and embodiments. In the drawings: Figure 1 is a schematic diagram of the present invention; Figure 2 is a partial enlarged view of the present invention; Figure 3 is a schematic diagram of another angle of the present invention. Detailed Embodiments

[0016] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are only a part rather than all of the embodiments of the present invention. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0017] As Figures 1-3 shown, an electromagnetic function test system includes: columns 100 on both sides. A feed source mounting platform 200 is installed in the middle of the columns 100 through a lifting structure 400. Two groups of feed source assemblies 500 are installed above the feed source mounting platform 200. An absorbing background structure 300 is provided at the bottom of the feed source mounting platform 200. A sample to be tested is placed in the middle of the absorbing background structure 300. The feed source mounting platform 200 is horizontally and laterally moved through a translation structure 600. The feed source assembly 500 has a rotating structure, so that the up-and-down movement, left-and-right movement and angular rotation transformation can be realized during the measurement process.

[0018] It should be noted that the lifting structure 400 is supported by a support structure provided at the top. The support structure, the feed source mounting platform 200 and the columns 100 are treated with absorbing paint to form a low-scattering support, meeting the test background of the free space method. The control of each component is uniformly controlled by the entire electromechanical system, and the control principle is conventional technology and will not be elaborated here.

[0019] As a preferred embodiment, the lifting structure 400 includes: a lifting servo motor 410. The lifting servo motor 410 is connected to a lifting transmission rod 420 through a transmission structure. Both ends of the lifting transmission rod 420 are transmitted with a 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. Both ends of the feed source mounting platform 200 are connected to the middle of the corresponding lifting transmission belt 430. Simply put, a driving shaft is driven by a motor, and transmission belts are tensioned at both ends of the driving shaft, and the belts drive the lifting of the feed source mounting platform 200.

[0020] As a preferred embodiment, a vertically arranged lifting guide rod 440 is provided in the column 100. The feed source mounting platform 200 is sleeved on the lifting guide rod 440, and the feed source mounting platform 200 is guided to move up and down through the lifting guide rod 440, so as to achieve the effect of stable lifting.

[0021] As a preferred embodiment, the feed assembly 500 includes a feed mounting base 510. The bottom of the feed mounting base 510 is slidably connected to the translation guide rail 210. The translation guide rail 210 is laid along the length direction of the feed mounting platform 200. The feed mounting base 510 is connected to the translation structure 600, so as to realize the horizontal movement of the feed mounting base 510. This structure realizes the left - right translation of the feed assembly 500, and the two feed assemblies 500 are independently controlled. Thus, the two groups of feed antennas can adjust the incident angle of the reflectivity test by moving left and right on the X - axis.

[0022] As 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 the horizontal direction. A rotary motor 530 is provided between one end of the anti - interference antenna bracket 520 and the feed mounting base 510. The other end of the anti - interference antenna bracket 520 is hinged with a broadband horn antenna 560.

[0023] As a preferred embodiment, an antenna angle control cylinder 550 is provided at the hinged joint of the broadband horn antenna 560 and the anti - interference antenna bracket 520.

[0024] As a preferred embodiment, a low - frequency log - periodic antenna 570 is provided at the top of the broadband horn antenna 560. The low - frequency log - periodic antenna 570 is connected to the anti - interference antenna bracket 520 through a bracket.

[0025] The frequency of the 1 - 18GHz broadband horn antenna 560 is 1 - 18GHz, and the frequency of the low - frequency log - periodic antenna 570 is 0.1 - 6GHz. It is separated from the overall facility device through the anti - interference antenna bracket 520, and can reduce the interference of the surrounding electromagnetic environment scatter sources during the reflectivity and bid rate tests.

[0026] As a preferred embodiment, the translation structure 600 is a transmission structure composed of a belt and a motor. The translation structures 600 of the two groups of feed assemblies 500 are independent of each other.

[0027] As a preferred embodiment, the two groups of translation structures 600 are arranged in a vertically staggered manner. Their opposite sides are vertically staggered and are tensioned by the vertical test travel frame 610 and connected to the feed mounting platform 200.

[0028] Simply put, the belts of the two groups of translation structures 600 are horizontally staggered in height, and the ends of both exceed the mid - point of the length direction of the opposite end and the feed mounting platform 200. Thus, each group of feeds can reach the mid - point of the length direction of the feed mounting platform 200, so as to realize the test of the radar wave test project of a single station in the 90 - degree vertical direction with the test platform.

[0029] As a preferred embodiment, the wave-absorbing background structure 300 includes a plurality of wave-absorbing tapered materials 310. A test platform 320 is disposed in the middle of the plurality of wave-absorbing tapered materials 310, and the bottom of the test platform 320 is supported by a wave-transmitting bracket 330.

[0030] The overall test background is composed of a reflectivity test platform 320 and a rigid wave-transmitting bracket 330 to form the plane center of the reflectivity sample platform. The low-decibel scattering background requirement is composed of wave-absorbing tapered materials 310. The height of the wave-absorbing tapered materials 310 is 700 mm, and the electromagnetic background is between -40 and -60 decibels, meeting the requirements of the reflectivity test environment.

[0031] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0032] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations. In addition, in the description of the present invention, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0033] It should be understood that those of ordinary skill in the art can make improvements or transformations according to the above description, and all such improvements and transformations should fall within the protection scope of the appended claims of the present invention.

Claims

1. An electromagnetic function testing system, characterized in that, Comprising: Columns (100) on both sides, a feed source mounting platform (200) is installed in the middle of the columns (100) through a lifting structure (400), two groups of feed source assemblies (500) are installed above the feed source mounting platform (200), an absorbing background structure (300) is provided at the bottom of the feed source mounting platform (200), a sample to be measured is placed in the middle of the absorbing background structure (300), the feed source mounting platform (200) realizes horizontal lateral movement through a translation structure (600), and a rotation structure is provided in the feed source assembly (500), so as to realize up and down movement, left and right movement and angular rotation transformation during the measurement process.

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

3. An electromagnetic function testing system according to claim 2, wherein, A vertically arranged lifting guide rod (440) is arranged in the column (100), the feed source mounting platform (200) is sleeved on the lifting guide rod (440), and the feed source mounting platform (200) is guided to move up and down through the lifting guide rod (440).

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

5. An electromagnetic function testing system according to claim 4, characterized in that An anti-interference antenna bracket (520) is installed on the vertical side surface of the feed source mounting base (510), the anti-interference antenna bracket (520) is arranged horizontally, a rotation motor (530) is arranged between one end of the anti-interference antenna bracket (520) and the feed source mounting base (510), and the other end of the anti-interference antenna bracket (520) is hinged with a broadband horn antenna (560).

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

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

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

9. An electromagnetic function test system according to claim 8, characterized in that, The two groups of translation structures (600) are arranged in a vertically staggered manner, and their opposite parts are vertically staggered and tensioned through a vertical test travel frame (610) and connected with the feed source mounting platform (200).

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

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