CN209764951U

CN209764951U - Metamaterial electromagnetic property testing device

Info

Publication number: CN209764951U
Application number: CN201920340241.9U
Authority: CN
Inventors: 赵国智; 牛沫雯; 毕世华
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-03-18
Filing date: 2019-03-18
Publication date: 2019-12-10
Anticipated expiration: 2029-03-18

Abstract

The application provides a metamaterial electromagnetic property testing device. The test device comprises a fixture device for fixing samples to be tested and an installation base for placing the fixture device, wherein the fixture device comprises a first flat panel, a second flat panel and a supporting rod positioned between the two flat panels, the first flat panel and the second flat panel are corresponding in position and are respectively provided with a plurality of grooves for fixing the upper ends and the lower ends of a plurality of samples to be tested, so that the plurality of samples to be tested are transversely arrayed in a square shape. The testing device is simple and easy to use, has a flexible structure, is convenient to process, and is economic and reliable.

Description

Metamaterial electromagnetic property testing device

Technical Field

The utility model relates to a test equipment technical field relates to a metamaterial electromagnetic characteristic test device especially.

Background

The metamaterial is an artificial composite structure or composite material with extraordinary physical properties which are not possessed by materials in nature, and is formed by periodic arrays of metamaterial units, and the unique electromagnetic property of the metamaterial enables the metamaterial to have huge application potential in various fields. At present, the electromagnetic property of the metamaterial is tested and measured by using a free space method, an extremely complex longitudinal and transverse orthogonal mounting fixture is required to be designed and processed generally and is used for fixing dozens of metamaterial array plates, the fixture processing is difficult, the precision requirement is high, the number of the array plates is large, the test cost is high, and the development and the popularization of scientific tests are not facilitated.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a metamaterial electromagnetic property test scheme of simple easy-to-use.

According to the utility model discloses, a metamaterial electromagnetic property test device is provided, including the fixture device who is used for the fixed sample that awaits measuring and being used for placing fixture device's installation base, fixture device includes the first flat panel on upper portion, the second flat panel of lower part and is located the bracing piece between two flat panels, first flat panel and second flat panel position parallel arrangement correspondingly, and be equipped with a plurality of recesses respectively, a plurality of recesses are used for fixed a plurality of upper ends and the lower extreme of the sample that awaits measuring, make a plurality of samples that await measuring horizontal array is squarely.

Wherein, on the first flat panel and the second flat panel, the center distance between adjacent grooves is 1 unit distance.

The groove on the first flat plate penetrates through the upper surface and the lower surface of the first flat plate; the groove on the second flat panel extends downwards for a distance from the upper surface of the second flat panel but does not reach the lower surface of the second flat panel.

The first flat panel and the second flat panel are square, and the number of the support rods is 4, and the support rods are respectively positioned at four corners of the flat panel.

The support rod is in threaded connection with the first flat panel, a nut is arranged at the connection position, and the distance between the first flat panel and the second flat panel can be adjusted by rotating the nut.

The mounting base comprises a bottom plate and vertical plates which are positioned on two sides of the bottom plate and are perpendicular to the bottom plate, and protrusions or grooves are formed in the middle of the two vertical plates respectively and used for placing the clamp device.

The device also comprises a matched calibration component for testing and correcting before the sample to be tested is tested.

Wherein, the calibration part is including calibration metal sheet and solid fixed splint, gu fixed splint are 2, and its shape matches with the recess shape on the riser of installation base, can imbed respectively in the recess on the riser, have the crack in the middle of gu fixed splint, the both ends of calibration metal sheet imbed respectively in gu fixed splint's crack.

Wherein, the sample to be detected is a strip-shaped object.

The utility model provides a simple easy-to-use's test device, the device structure is dexterous, the processing of being convenient for, and economy is reliable, can develop the free space method of metamaterial electromagnetic parameter in view of the above and measure, and measuring result is accurate.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 shows a block diagram of a test rig according to the invention;

Figure 2 shows a block diagram of a clamp device according to the invention;

FIG. 3 is a schematic view showing the manner in which the support bar is connected to the first panel;

Fig. 4 shows a sample structure diagram according to the present invention.

Fig. 5 shows a comparison of the results of measurements performed by the device according to the invention.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

fig. 1 shows the structure of a test device according to the present invention, which comprises a fixture device 1 for fixing a sample to be tested and a mounting base 2 for placing the fixture device.

The fixture device 1 comprises a first flat plate 11 on the upper portion, a second flat plate 12 on the lower portion and a support rod 13 located between the two flat plates, wherein the first flat plate 11 and the second flat plate 12 are correspondingly arranged in parallel and are respectively provided with a plurality of grooves for fixing the upper ends and the lower ends of a plurality of samples to be tested, so that the plurality of samples to be tested are transversely arrayed in a square shape. The quantity and the position of the grooves on the two plane plates are corresponding, the shape of the grooves is matched with the end part of a strip sample to be detected, the upper end of each sample to be detected is embedded into the groove of the first plane plate 11, and the lower end of each sample to be detected is embedded into the groove of the second plane plate 12, so that the sample to be detected can be fixed. On each plane plate, the central points of the grooves are arranged along a straight line, and the central distance between every two adjacent grooves is 1 metamaterial unit distance, so that the sample to be tested is in a square shape, and the side length of the sample to be tested is optionally 18-20 cm. Optionally, the first flat plate 11 and the second flat plate 12 are square, and the number of the support rods 13 is 4, which are respectively located at four corners of the flat plate.

The mounting base 2 comprises a bottom plate 21 and vertical plates 22 and 23 which are positioned on two sides of the bottom plate and are perpendicular to the bottom plate, wherein the middle parts of the two vertical plates are respectively provided with a protrusion or a groove for placing the clamp device. As an example, the risers 22 and 23 in fig. 1 are provided with a groove 24 extending in the vertical direction from the top to the middle of the riser, the length of which is slightly greater than the distance from the first to the second flat panel, to stably place the clip; the depth of the groove is smaller than the thickness of the vertical plate, and the width of the groove is matched with the second flat panel of the fixture device, so that the second flat panel can be embedded into the groove and erected at the lower end of the groove. Optionally, the lower end of the groove has a step shape, so that when the fixture device is placed, the second flat plate is erected on the step, and the lower part of the second flat plate is provided with a groove with a certain space, so that the fixture device can be conveniently taken out after the test is finished or when needed. Alternatively, one or more square or L-shaped protrusions may be used to position the clamping device.

Fig. 2 specifically shows the structure of the clamping device according to the present invention, wherein the groove on the first flat plate 11 is a through hole penetrating the upper surface and the lower surface of the first flat plate 11; the groove on the second flat plate 12 is a blind hole, and extends a distance downward from the upper surface of the second flat plate 12, but does not reach the lower surface of the second flat plate 12. Therefore, when the test sample placing device is used, the upper end of the test sample can be embedded into the through hole groove of the first flat plate 11 to be fixed, the lower end of the test sample is embedded into the blind hole groove of the second flat plate 12 to be fixed, and the test sample can be placed more quickly and conveniently. The support rod 13 is fixedly connected with the second flat panel 12, is in threaded connection with the first flat panel 11, and is provided with a nut at the joint, and the nut is rotated to adjust the distance between the first flat panel 11 and the second flat panel 12, so that the test device is suitable for test samples with different sizes, and the placing stability of the test samples is ensured. Alternatively, as shown in fig. 3, the upper portion of the support rod 13 may be a hollow cylinder, the inner wall of the cylinder is threaded, and after passing through the through hole of the first flat plate 11 using a screw 31 as a connecting member, the screw passes through a nut 32 and enters the cylinder, so that the position of the first flat plate can be moved upward or downward by rotating the nut, thereby adjusting the distance between the first flat plate and the second flat plate. Optionally, there is a nut 32 above the first panel, and the position of the first panel can be more stable by clamping the two nuts

Optionally, the device further comprises a calibration component configured to perform a calibration before testing the sample to be tested. The calibration part is including calibration metal sheet and solid fixed splint, gu fixed splint are 2, and its shape matches with the recess shape on the riser of installation base, can imbed respectively in the recess on the riser, have the crack in the middle of gu fixed splint, the both ends of calibration metal sheet imbed respectively in gu fixed splint's the crack. The calibration metal plate is optionally an aluminum plate.

Fig. 4 shows a sample structure diagram according to the present invention. The sample to be detected is a strip-shaped object, and the whole shape of the sample to be detected is a cuboid. Optionally, the metamaterial sample is processed into a square panel at one time, and then a batch of strips are longitudinally cut to form the sample to be tested, the processed square panel is a planar array of single-layer metamaterial units, and the panel thickness, namely the unit thickness, is ensured to be not easy to break after being cut into strips.

The device is used for testing the electromagnetic property of the metamaterial according to the following modes:

And respectively embedding the upper ends of a plurality of samples to be detected into the grooves of the first flat panel of the fixture device, embedding the lower ends of the samples to be detected into the grooves of the second flat panel, and transversely arraying the samples to be detected into a square shape. Specifically, after the upper end of each sample to be tested is inserted into the groove from the lower surface of the first flat panel, all samples to be tested are supported on the second flat panel, and the distance between the lower ends of the samples to be tested is adjusted to ensure that the samples to be tested are sequentially embedded into the bottom of the groove of the second flat panel one by one. Then, the distance between the first flat panel and the second flat panel is adjusted through the nuts on the supporting columns, so that the sample to be tested is fixed reliably, and the placing position meets the testing requirement.

And placing the matched calibration metal plate and the fixed clamping plate thereof at the position of the fixture device on the mounting base for testing and correcting.

And taking down the calibration metal plate and the fixing clamp plate thereof, and placing the clamp device on the mounting base. For example, the second flat panel of the clamping device is inserted into the groove of the riser from the upper end of the riser, and the clamping device is moved downward until the lower surface of the second flat panel contacts the lower end of the groove, thereby bridging the groove.

And irradiating the sample to be detected, and recording the electromagnetic characteristic parameters of the sample to be detected.

Fig. 5 shows a comparison of the results of measurements performed by the device according to the invention. The adoption is that dekoku KEYSI GHTE5071C vector network analyzer has measured the electromagnetic parameter of a certain metamaterial, and wherein the solid line is the result that the emulation obtained, and the dotted line is the result that the test measurement obtained, and the high fit of visual test result and emulation result has proved the utility model discloses a measuring result has higher degree of accuracy.

The utility model provides a simple and convenient easy-to-use of test device, device structure is dexterous, be convenient for processing, economy is reliable, the operation of being convenient for, can develop the free space method of metamaterial electromagnetic parameter according to the scheme in view of the above and measure, and measuring result is accurate.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a metamaterial electromagnetic property test device, its characterized in that, including the fixture device that is used for fixed sample that awaits measuring and being used for placing fixture device's installation base, fixture device includes the first flat panel on upper portion, the second flat panel of lower part and is located the bracing piece between two flat panels, first flat panel and second flat panel position parallel arrangement correspondingly, and be equipped with a plurality of recesses respectively, a plurality of recesses are used for fixed a plurality of upper ends and the lower extreme that awaits measuring the sample, make a plurality of samples that await measuring horizontal array is square.

2. The apparatus of claim 1, wherein on the first planar sheet and the second planar sheet, the center-to-center spacing between adjacent grooves is 1 cell pitch.

3. the apparatus of claim 1 or 2, wherein the groove in the first planar sheet extends through the upper and lower surfaces of the first planar sheet; the groove on the second flat panel extends downwards for a distance from the upper surface of the second flat panel but does not reach the lower surface of the second flat panel.

4. The apparatus of claim 1, wherein the first and second panels are square and the number of support rods is 4, each at a respective corner of the panel.

5. The apparatus of claim 1 or 4, wherein the support rod is threadedly connected to the first flat plate and has a nut at the connection, and the distance between the first and second flat plates is adjustable by rotating the nut.

6. the device of claim 1, wherein the mounting base comprises a bottom plate and vertical plates perpendicular to the bottom plate and located on both sides of the bottom plate, and a protrusion or a groove is formed in the middle of each of the two vertical plates for receiving the clamp device.

7. The apparatus of claim 6, further comprising a calibration component configured to perform a calibration test prior to testing the sample to be tested.

8. The device of claim 7, wherein the alignment member comprises 2 alignment metal plates and 2 fixing clips, the shape of the fixing clips matches with the shape of the grooves on the vertical plate of the mounting base, the fixing clips can be respectively inserted into the grooves on the vertical plate, a gap is arranged in the middle of the fixing clips, and two ends of the alignment metal plates are respectively inserted into the gaps of the fixing clips.

9. The apparatus of claim 1, wherein the sample to be tested is a strip.