CN110568269A

CN110568269A - test system

Info

Publication number: CN110568269A
Application number: CN201910862149.3A
Authority: CN
Inventors: 夏冬雪
Original assignee: Shenzhen Rongsheng Technology Co Ltd
Current assignee: Shenzhen Rongsheng Technology Co Ltd
Priority date: 2019-09-12
Filing date: 2019-09-12
Publication date: 2019-12-13

Abstract

The invention relates to a test system, comprising a shielding shell; a turntable and a test probe are arranged in the shielding shell; the tested piece is arranged on the rotary table; the inner wall of the shielding shell is provided with a wave absorbing structure; and the inner wall of the shielding shell opposite to the tested piece is fixedly connected with the test probe. The invention optimizes the connection mode of the test probe, cancels the holding pole, directly connects the test probe to the shielding shell, has high absorption rate to the electromagnetic signal from the tested piece because the inner wall of the test shell attached with the wave-absorbing structure is a plane, can not generate the interference to the test of the tested piece because of the scattering phenomenon by the curved surface of the holding pole surface, and improves the test accuracy.

Description

Test system

Technical Field

The invention relates to a test system for testing the radiation performance of a tested piece.

Background

at present, a test system for testing the radiation performance of a tested piece adopts a structure as shown in fig. 1, a tested piece 6 '(DUT) is arranged on a rotary table 5', a test probe 3 'is arranged at a position spaced from the rotary table 5' along the horizontal direction, the test probe 3 'is fixedly installed through a holding pole 2', and the holding pole 2 'is provided with a wave-absorbing structure 4'. The radiation performance, including the transmission performance and the reception performance, of the tested piece 6 'is tested by the test probe 3'. The tested piece 6 ', the rotary table 5 ', the test probe 3 ' and the holding rod 2 ' are arranged in the microwave darkroom 1 '.

The above-described structure has a problem in that the measurement test result of the object under test is available when the object under test 6' is a general antenna, but the test result of the radiation performance of the object under test is inaccurate when the object under test such as a radar antenna is encountered.

Therefore, it is an urgent need for those skilled in the art to find a anechoic chamber system suitable for both the common antenna and the radar antenna.

disclosure of Invention

To overcome, at least to some extent, the above-mentioned problems of the prior art, the present invention provides a method.

the invention relates to a test system, which comprises a shielding shell; a turntable and a test probe are arranged in the shielding shell; the tested piece is arranged on the rotary table; the inner wall of the shielding shell is provided with a wave absorbing structure; and the inner wall of the shielding shell opposite to the tested piece is fixedly connected with the test probe.

Furthermore, in the test system, the inner wall of the shielding shell opposite to the tested piece is provided with a mounting hole; the test probe penetrates through the mounting hole and is fixedly connected with a fixing part arranged on the outer side of the shielding shell.

Further, in the above test system, the test probe is connected to a connection part; the connecting part penetrates through the mounting hole and is fixedly connected with the fixing part.

Further, in the above test system, the connecting portion is further sleeved with a wave absorbing portion for shielding the mounting hole.

Further, in the above test system, the fixing portion and the connecting portion are connected by a screw thread to fix the test probe to the inner wall of the shield case.

The invention optimizes the connection mode of the test probe, cancels the holding pole, directly connects the test probe to the shielding shell, has high absorption rate to the electromagnetic signal from the tested piece because the inner wall of the test shell attached with the wave-absorbing structure is a plane, can not generate the interference to the test of the tested piece because of the scattering phenomenon by the curved surface of the holding pole surface, and improves the test accuracy.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.

drawings

the accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.

FIG. 1 is a schematic diagram of a prior art radiation performance testing system;

FIG. 2 is a side view of an embodiment of a test system of the present invention;

FIG. 3 is a top view of an embodiment of a test system of the present invention;

FIG. 4 is a schematic view of the test probe installed in another embodiment of the test system of the present invention.

Wherein:

1' shielded housing

2' holding pole

3' test probe

4' wave-absorbing structure

5' rotary table

6' measured piece

1 Shielding case

3 test probe

4 wave-absorbing structure

5 rotating platform

6 measured piece

7 wave absorbing part

8 mounting hole

9 connecting part

10 fixed part

Detailed Description

it should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

referring to fig. 1, upon repeated studies, the applicant found that: when the emission performance of the tested piece 6 'is tested, the tested piece 6' emits electromagnetic waves, and besides the test probe 3 ', the holding pole 2' also has influence on electromagnetic signals. When the tested piece 6 'is a common antenna, the influence of scattering of the holding pole 2' on the testing precision can be ignored, but when the tested piece 6 'is a high-precision tested piece such as a radar, the influence of the holding pole 2' on scattering and the like generated by an electromagnetic signal from the tested piece 6 'is displayed due to poor wave-transmitting performance of the holding pole 2', and the testing of the radar antenna is seriously influenced. In short, the test results of the influence of the pole 2' on electromagnetic signals, such as scattering, are described. And the electromagnetic signal sent by the tested piece 6 'is vertically incident relative to the wave-absorbing structure 4', and the absorption is best.

The applicant has proposed the present invention through the above-mentioned analytical studies. Referring to fig. 2 and 3, one embodiment of a test system embodiment of the present invention is shown.

The test system of the present embodiment includes a shield case 1. A turntable 5 and a test probe 3 are arranged in the shielding shell 1; the tested piece 6 is arranged on the rotary table 5; the inner wall of the shielding shell 1 is provided with a wave-absorbing structure 4; a test probe 3 is fixedly connected to an inner wall of the shield case 1 opposite to the test object 6.

In the present embodiment, the test probe 3 is fixedly connected to the inner wall as follows: the inner wall of the shielding shell 1 opposite to the tested piece 6 is provided with a mounting hole 8. The test probe 3 is further provided with a connecting part 9, and the connecting part 9 of the test probe 3 passes through the mounting hole 8 and is fixedly connected with a fixing part 10 arranged on the outer side of the shielding shell 1.

In the present embodiment, the fixing portion 10 and the connecting portion 9 fix the test probe 3 to the inner wall of the shield case 1 by screwing.

It should be noted that the test probe 3 may also be directly fixed and connected to the inner wall by other methods known in the art, and the fixing method of the test probe 3 is not limited in the present invention.

The invention optimizes the connection mode of the test probe, cancels the holding pole, directly connects the test probe to the shielding shell, has high absorption rate to the electromagnetic signal from the tested piece because the inner wall of the test shell attached with the wave-absorbing structure is a plane, can not generate the interference to the test of the tested piece because of the scattering phenomenon by the curved surface of the holding pole surface, and improves the test accuracy. The invention solves the problem in the current radar test, develops a new method, and cancels the holding rod, so that the test result is accurate and usable.

Referring to fig. 4, fig. 4 is a schematic view illustrating an installation of a test probe in another embodiment of the test system of the present invention. As can be seen from fig. 4, the connecting portion 9 is further sleeved with a wave absorbing portion 7 for shielding the mounting hole. This is because, when the mounting hole 8 is opened to a relatively large extent, the mounting hole 8 cannot be covered by the size of the test probe, and thus, there is no wave-absorbing material in the region of the mounting hole 8, and in order to avoid measurement errors, the connecting portion is further sleeved with a wave-absorbing portion 7 for completely shielding the mounting hole 8.

In addition, in some embodiments, the distance between the tested piece 6 and the test probe 3 can be lengthened, and the dead zone error and amplitude ripple can be optimized.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. A test system, comprising:

a shield case;

A turntable and a test probe are arranged in the shielding shell;

the tested piece is arranged on the rotary table;

The inner wall of the shielding shell is provided with a wave absorbing structure;

And the inner wall of the shielding shell opposite to the tested piece is fixedly connected with the test probe.

2. The test system of claim 1,

the inner wall of the shielding shell opposite to the tested piece is provided with a mounting hole;

The test probe penetrates through the mounting hole and is fixedly connected with a fixing part arranged on the outer side of the shielding shell.

3. The test system of claim 2,

The test probe is connected with a connecting part;

The connecting part penetrates through the mounting hole and is fixedly connected with the fixing part.

4. The test system of claim 3,

The connecting portion is also sleeved with a wave absorbing portion used for shielding the mounting hole.

5. The test system of claim 4,

The fixed part and the connecting part are connected through threads to fix the test probe on the inner wall of the shielding shell.