Wave-absorbing material flat plate reflectivity testing device

Abstract

The utility model relates to the technical field of wave-absorbing material testing, and discloses a wave-absorbing material flat plate reflectivity testing device which comprises a flat plate sample table and a horn antenna matched with the flat plate sample table, the flat sample table comprises a cylindrical rod, a base, a rotating track, a table top and an inverted T-shaped metal panel which are connected with one another; the inverted T-shaped metal panel is driven to rotate along the circumferential direction when the rotating track on the table top rotates; the testing sample is arranged on one side face, facing the horn antenna, of a vertical panel of the inverted-T-shaped metal panel, and when the rotating track rotates in the circumferential direction, the inverted-T-shaped metal panel is driven to rotate in the circumferential direction, or the angle between the vertical panel and a horizontal panel of the T-shaped metal panel is adjusted, so that the testing sample is tested. And direction angles and pitch angles between the plane of the test sample and the horn antennas can be adjusted. The device has the advantages of being flexible and convenient to use, small in occupied area, capable of achieving multi-stage adjustment, high in testing precision and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of absorbing material testing, in particular to a device for testing the reflectivity of a flat plate of absorbing material. Background Art

[0002] Absorbing materials can convert incident electromagnetic wave energy into other forms of energy, mainly heat energy, to achieve absorption of electromagnetic waves, solve electromagnetic pollution, electromagnetic interference, and achieve radar stealth. Reflectivity is a key indicator for evaluating the absorption effect of absorbing materials on incident electromagnetic waves. Accurate measurement of reflectivity of absorbing materials is of great value and significance.

[0003] The principle of reflectivity test of absorbing materials is: in a microwave darkroom, the test sample and the test instrument are positioned, and based on the vector network analyzer, the signal strength of the receiving and transmitting horn antennas is compared to obtain the electromagnetic wave energy lost in the absorbing material, and the corresponding test parameters and results are calculated. At this time, the angular positioning between the flat sample stage and the two horn antennas is a key factor affecting the accuracy of the test reflectivity. The existing test device sets the horn antenna on a bow frame, which is one of the common solutions, but it occupies a large area and is almost immovable. It is difficult to install in a microwave darkroom with limited space and is expensive.

[0004] If two horn antennas are placed directly on a movable support frame, although the support frame is highly flexible and easy to use, it is difficult to ensure the accuracy of mutual positioning in the actual test operation of the test sample in multiple directions, multiple parameters, and multiple indicators, thus affecting the test accuracy. Therefore, a newly designed reflectivity test device for absorbing material flat panels is studied to meet the test requirements of multiple parameters and indicators, which has strong application value. Utility Model Content

[0005] In order to solve the above problems, the utility model provides a newly designed flat sample reflectivity testing device, which reduces the space occupied by the test sample by improving the support stability and spatial layout of the test sample. On the basis of facilitating the adjustment of the relative height and angle, the utility model improves the accuracy of the height, azimuth, elevation and depression angles between the test sample and the horn antenna through multi-stage adjustment, so as to meet the actual testing needs of the test sample in multiple directions, multiple parameters and multiple indicators.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A device for testing the reflectivity of a flat plate of an absorbing material comprises: a flat sample stage and a horn antenna used in conjunction therewith, wherein the horn antenna comprises a transmitting horn antenna and a receiving horn antenna which are separately arranged; the flat sample stage comprises mutually connected cylindrical rods, a base, a rotating track, a table top, and an inverted T-shaped metal panel, wherein the cylindrical rods are multiple and vertically parallel, the bottom end of each cylindrical rod is respectively provided with a base, the upper end of each cylindrical rod is respectively connected to the table top, and the upper surface of the table top is provided with a rotating track; an inverted T-shaped metal panel is provided on the upper part of the rotating track; the inverted T-shaped metal panel comprises a horizontal panel and a vertical panel which are connected to each other; when the rotating track on the table top rotates, the inverted T-shaped metal panel is driven to rotate in a circular direction; the test sample is arranged on a side surface of the vertical panel of the inverted T-shaped metal panel facing the horn antenna.

[0008] When the rotating track rotates in a circular direction, it drives the inverted T-shaped metal panel to rotate in a circular direction, thereby adjusting the direction angle between the plane of the test sample on the T-shaped metal panel and each horn antenna; by adjusting the angle between the vertical panel and the horizontal panel of the T-shaped metal panel, the pitch angle between the test sample and each horn antenna can also be adjusted.

[0009] There are four cylindrical rods, which are respectively connected to the base through threads, and the length of the cylindrical rods can be adjusted through the threaded connection, so as to adjust the relative height between the T-shaped metal panel and the test sample on the upper part of the cylindrical rod and each horn antenna; by adjusting the four cylindrical rods respectively to have different heights, the azimuth angle and pitch angle between the test sample and the horn antenna can be adjusted.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] 1. The improved flat sample reflectivity test device of the utility model reduces the space occupied by the test sample by improving the support stability and spatial layout of the test sample. On the basis of convenient adjustment of the relative height and angle, the multi-stage adjustment is used to improve the accuracy of the height, azimuth, elevation and depression angle control between the test sample and the horn antenna, so as to meet the actual test requirements of the test sample in multiple directions, multiple parameters and multiple indicators.

[0012] 2. The utility model focuses on improving the structural design of the flat sample stage, and supports multi-level precise adjustment under precise positioning conditions to improve monitoring accuracy and meet the actual testing needs of multi-directional, multi-parameter, and multi-indicator testing of test samples.

[0013] 3. The flat sample stage of the utility model can adjust the height of the base and the cylindrical rod steplessly through the threaded connection between the base and the cylindrical rod to achieve the elevation and depression angle control between the test sample and the horn antenna.

[0014] 4. The flat sample table of the utility model has a rotating track on the cylindrical rod, and the rotating track is connected to the table top. When the test sample is placed on the test area of ​​the inverted T-shaped metal panel, the table top is rotated to achieve stepless angular control between the test sample and the horn antenna.

[0015] 5. The utility model uses an improved flat sample table and a bracket to fix two horn antennas, which has a simple structure, occupies a small space and is cheap.

[0016] 6. The utility model rotates each base separately so that when the metal threaded rod moves up and down, the height of the cylindrical rod can be adjusted to achieve one-level adjustment; when the rotating track rotates, the height, azimuth angle and pitch angle between the test sample on the flat sample table and the two horn antennas are adjusted accordingly to achieve two-level adjustment; by adjusting the hinge angle between the vertical panel and the horizontal panel of the T-shaped metal panel, the height, azimuth angle and pitch angle between the test sample and the horn antenna can also be adjusted to achieve three-level adjustment, and the three-level adjustment can be performed independently or together, thereby achieving multi-level stepless precision adjustment under precise positioning conditions to improve the positioning accuracy of the test and the accuracy of the test data. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall three-dimensional appearance structure of the test device according to the embodiment of the utility model;

[0018] Figure 2 for Figure 1 Schematic diagram of the right view of the structure when the test sample is fixed on the middle flat sample stage;

[0019] Figure 3 This is a schematic diagram of the main structure of the flat sample stage in the embodiment of the utility model;

[0020] Figure 4 This is a left-side structural schematic diagram of a flat sample stage in an embodiment of the utility model;

[0021] Figure 5 This is a schematic diagram of the top view of the flat sample stage in the embodiment of the utility model;

[0022] Figure 6 This is a schematic diagram of the bottom-up structure of the flat sample stage in the embodiment of the utility model;

[0023] Figure 7 It is a schematic diagram of the assembly structure of the flat sample stage in the embodiment of the utility model.

[0024] In the figure: 10, flat sample table; 1, cylindrical rod; 2, base; 21, rubber bottom plate; 22, metal threaded rod; 3, rotating track; 4, table top; 5, inverted T-shaped metal panel; 6, level; 7, transmitting horn antenna; 8, receiving horn antenna; 9, test sample. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] Example

[0027] See also Figure 1-7 The utility model provides a reflectivity test device for a flat plate of an absorbing material, which can be applied to electromagnetic absorbing material test experiments of various parameters, and can be applied to the test of sheet-shaped and block-shaped magnetic absorbing material samples, and comprises: a flat sample stage 10 and a horn antenna used in conjunction with it, wherein the horn antenna comprises two discretely arranged transmitting horn antennas 7 and receiving horn antennas 8; the flat sample stage 10 is improved in design, and comprises a cylindrical rod 1, a base 2, a rotating track 3, a table 4, and an inverted T-shaped metal panel 5 connected to each other; wherein the cylindrical rod 1 is a plurality of (greater than three, vertically parallel, each cylindrical rod is arranged in parallel, and ... A base 2 is provided at the bottom end of the column 1, and the upper end of each cylindrical rod 1 is connected to a table 4, on the upper surface of which a rotating track 3 is provided; an inverted T-shaped metal panel 5 is provided on the upper part of the rotating track 3; the inverted T-shaped metal panel 5 includes a horizontal panel and a vertical panel (with a T-shaped cross section) connected to each other, and when the rotating track 3 on the table 4 rotates, the inverted T-shaped metal panel 5 is driven to rotate in a circular direction; the test sample 9 is arranged on the side of the vertical panel of the inverted T-shaped metal panel 5 facing the horn antenna, and its front side faces the transmitting horn antenna 7 and the receiving horn antenna 8.

[0028] When the rotating track 3 rotates, it drives the inverted T-shaped metal panel 5 to rotate in a circular direction, thereby adjusting the direction angle between the front plane of the test sample 9 on the T-shaped metal panel 5 and each horn antenna to support the testing of multiple parameters, which constitutes a first-level independent adjustment.

[0029] In this embodiment, there are four cylindrical rods 1, which are respectively connected to the base 2 by threads, and the length of the cylindrical rod 1 can be adjusted by the threaded connection, so as to adjust the relative height between the T-shaped metal panel 5 and the test sample 9 on the upper part of the cylindrical rod 1 and each horn antenna; when the height of one or more of the four cylindrical rods 1 is adjusted by rotating the thread, the height, azimuth angle, and pitch angle between the test sample 9 fixed on the flat sample stage 10 and the horn antenna can also be adjusted accordingly, which also constitutes an independent first-level adjustment. In this embodiment, the cylindrical rod 1 is made of metal, such as aluminum or other light alloys; the diameter of the cylindrical rod 1 is 20 to 30 mm, and the bottom section is provided with a hollow countersunk hole and a thread for accommodating the metal threaded rod 22 with the base 2.

[0030] In this embodiment, there are four bases 2, each of which includes a sheet-like rubber base plate 21 and an upwardly extending metal threaded rod 22, which is connected to the cylindrical rod 1 through a thread. The bottom diameter of the sheet-like rubber base plate is 50-60 mm, and is fixedly connected to the threaded rod.

[0031] The horizontal panel and the vertical panel of the inverted T-shaped metal panel 5 are hinged or fixedly connected to each other. The horizontal panel is connected to the table 4 and is rectangular with a size of 180-200 mm in length and 180 mm in width; the vertical panel is square with a side length of 180 mm, which is consistent with the standard size of the test sample 9 and completely overlaps with the test sample 9.

[0032] In this embodiment, the inverted T-shaped metal panel 5 includes a horizontal panel and a vertical panel that are hinged to each other. By adjusting the angle between the vertical panel and the horizontal panel of the T-shaped metal panel 5, the pitch angle between the test sample 9 and each horn antenna can also be adjusted, forming a first-level independent adjustment.

[0033] The vertical panel of the inverted T-shaped metal panel 5 is vertically arranged at the front position of the horizontal panel, and an extension portion for fixing the test sample 9 is left at the front, and its thickness is consistent with the thickness of the test sample 9, so that the extension portion and the test sample 9 are completely overlapped.

[0034] The inverted T-shaped metal panel 5 is horizontally provided with a level meter 6 in the X-axis and Y-axis directions, and both levels 6 are bubble levels; the bubble level meter 6 in the X-axis direction is used to determine the pitch angle, and the bubble level meter 6 in the Y-axis direction is used to determine the direction angle.

[0035] The rotating track 3 is annular, with its bottom surface fixed on the table 4 and the top connected to the horizontal panel of the inverted T-shaped metal panel 5. In this embodiment, the diameter of the rotating track 3 is greater than 100mm, and the upper and lower surfaces are connected by sliding (or through balls).

[0036] The transmitting horn antenna 7 and the receiving horn antenna 8 are respectively arranged on one side of the test sample 9 on the flat sample stage 10 according to the distance and orientation required for the test, and are symmetrically distributed on the left and right. Both can be moved freely, so the relative distance, height and angle between them and the test sample 9 are adjustable, which also constitutes a first-level independent adjustment.

[0037] The working principle of the utility model is as follows: the utility model is set in a microwave darkroom, and the transmitting horn antenna 7 and the receiving horn antenna 8 are respectively fixed in front of the flat sample stage with brackets, and the distance, height and angle are fixed; during the test, the test sample 9 is vertically placed on the extended part of the inverted T-shaped metal panel 5 so that it completely overlaps with the vertical panel; the relevant components of the flat sample stage 10 are adjusted to obtain the relative height, distance, direction angle, pitch angle, etc. required for the test, the transmitting horn antenna 7 is turned on, and a signal is sent to the test sample 9, and the receiving horn antenna 8 is turned on at the same time to receive the signal reflected by the test sample 9, and the test data can be obtained by analyzing the signal.

[0038] Adjust the relevant components of the flat sample stage 10, specifically: by adjusting the base 2 and the threaded rod of the cylindrical rod 1, the height and inclination of the cylindrical rod 1 can be adjusted; using the level 6 in the X-axis and Y-axis directions of the inverted T-shaped metal panel 5 as a reference, adjust the horizontal direction of the inverted T-shaped metal panel 5; when necessary, perform circumferential rotation adjustment through the rotating track 3 set on the cylindrical rod 1; because the rotating track 3 is connected to the table 4, when the test sample 9 is placed on the test area of ​​the inverted T-shaped metal panel 5, by rotating the table 4, the direction angle between the test sample 8 and the horn antenna can also be steplessly adjusted, so that the receiving horn antenna 8 can better receive the signal reflected by the test sample 9, thereby obtaining more accurate test data.

[0039] Therefore, the utility model can perform multi-level adjustment to improve the test accuracy: when each base 2 is rotated separately to move the metal threaded rod up and down, the height of the cylindrical rod 1 can be adjusted to perform a first-level adjustment; when the rotating track 3 rotates, the height, azimuth angle, and pitch angle between the test sample 9 on the flat sample stage 10 and the horn antenna are adjusted accordingly to perform a second-level adjustment; by adjusting the angle between the vertical panel and the horizontal panel of the T-shaped metal panel 5, the height, azimuth angle, and pitch angle between the test sample 9 on the flat sample stage 10 and the horn antenna can also be adjusted, thereby achieving multi-level precise adjustment under precise positioning conditions to improve the test accuracy.

[0040] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for testing the reflectivity of a flat plate of an absorbing material, characterized in that: It includes: A flat sample stage (10) and a horn antenna for use therewith, wherein the horn antenna comprises a transmitting horn antenna (7) and a receiving horn antenna (8) which are arranged separately; the flat sample stage (10) comprises a cylindrical rod (1) connected to each other, a base (2), a rotating track (3), a table top (4), and an inverted T-shaped metal panel (5), wherein the cylindrical rods (1) are multiple and arranged vertically and in parallel, the bottom end of each cylindrical rod (1) is respectively provided with a base (2), the upper end of each cylindrical rod (1) is respectively connected to the table top (4), and the upper surface of the table top (4) is provided with a rotating track (3); an inverted T-shaped metal panel (5) is provided on the upper part of the rotating track (3); the inverted T-shaped metal panel (5) comprises a horizontal panel and a vertical panel connected to each other, and when the rotating track (3) on the table top (4) rotates, the inverted T-shaped metal panel (5) is driven to rotate in a circumferential direction; and a test sample (9) is arranged on a side surface of the vertical panel of the inverted T-shaped metal panel (5) facing the horn antenna.

2. The reflectivity test device for a flat plate of an absorbing material according to claim 1, characterized in that: There are four cylindrical rods (1), which are respectively connected to the base (2) through threads, and the length of the cylindrical rods (1) can be adjusted through the threaded connection.

3. The reflectivity test device for a wave absorbing material plate according to claim 1, characterized in that: There are four bases (2), each of which comprises a sheet-like rubber bottom plate (21) and a metal threaded rod (22) extending upward.

4. The reflectivity test device for a flat plate of an absorbing material according to claim 1, characterized in that: The horizontal panel and the vertical panel of the inverted T-shaped metal panel (5) are hinged or fixedly connected to each other.

5. The reflectivity test device for a slab of absorbing material according to claim 1, characterized in that: The vertical panel of the inverted T-shaped metal panel (5) is vertically arranged at a front position of the horizontal panel, and a protruding portion for fixing the test sample (9) is left at the front.

6. The reflectivity test device for a slab of absorbing material according to claim 1, characterized in that: The inverted T-shaped metal panel (5) is also provided with a level meter (6) in the X-axis and Y-axis directions of the horizontal panel, respectively. Both level meters (6) are bubble levels.

7. The reflectivity test device for a slab of absorbing material according to claim 1, characterized in that: The rotating track (3) is annular, with its bottom surface fixedly arranged on the table top (4) and its top surface connected to the horizontal panel of the inverted T-shaped metal panel (5).

8. The reflectivity testing device for a slab of absorbing material according to claim 1, characterized in that: The transmitting horn antenna (7) and the receiving horn antenna (8) are respectively arranged on one side of the test sample (9) on the flat sample platform (10) and are symmetrically distributed.

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