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Method for testing textile material shielding effectiveness based on live room condition

A technology of shielding effectiveness and fabric materials, which is applied in the detection field of shielding effectiveness, can solve problems such as the inability to eliminate the influence of test window results, and achieve good electromagnetic shielding ability, accurate test results, and good repeatability

Active Publication Date: 2014-05-07
PEOPLES LIBERATION ARMY ORDNANCE ENG COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method cannot eliminate the influence of the test window on the results. One of the most significant problems is that when the test material is not loaded, the shielding effectiveness value obtained is not zero due to the aperture coupling effect of the test window.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Method for testing textile material shielding effectiveness based on live room condition
  • Method for testing textile material shielding effectiveness based on live room condition
  • Method for testing textile material shielding effectiveness based on live room condition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The steps of embodiment 1 are as follows, as attached figure 1 shown:

[0025] Step 1: Construct a small mechanically stirred reverberation chamber using the fabric electromagnetic shielding material to be tested:

[0026] as attached figure 2 As shown, the electromagnetic shielding material 3 of the tested fabric is sewn into a rectangular cavity, one of which is provided with a zipper 4, the zipper 4 is opened, and a rectangular frame made of a non-conductive rod 2 is used to support it, and inside it Place a small agitator, and then close the zipper 4 to form a small mechanical stirring reverberation chamber 1; the small agitator is composed of a first stepping motor 6 and a first fan blade 7, and the output of the first stepping motor 6 drives the first A fan blade 7 rotates.

[0027] Step 2: Build a test platform:

[0028] Place the small mechanically stirred reverberation chamber 1 in the test area of ​​the large reverberation chamber 5 to form a nested rever...

Embodiment 2

[0035] The steps of embodiment 2 are as follows:

[0036] Step 1: Construct a small mechanically stirred reverberation chamber using the fabric electromagnetic shielding material to be tested:

[0037] Sew the fabric electromagnetic shielding material 3 to be tested into a conical cavity with a zipper 4 on its side, open the zipper 4, prop it up with a conical frame made of non-conductor rods 2, and place a small agitator, and then close the zipper 4 to form a small-scale mechanical stirring reverberation chamber 1; Leaf 7 rotates.

[0038] Step 2: Build a test platform:

[0039] Place the small mechanically stirred reverberation chamber 1 in the test area of ​​the large reverberation chamber 5 to form a nested reverberation chamber;

[0040] Step 3: Follow the attached image 3 The structure and principle block diagram of the test system shown in the test system is set up, the frequency of the signal source 13 is set and electromagnetic waves are radiated to the large rev...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The invention discloses a method for testing the textile material shielding effectiveness based on a live room condition. The method comprises the steps that (1) a small-type mechanism stirring live room is made of a textile electromagnetic shielding material to be tested; (2) a nested live room is manufactured; (3) the frequency of a signal source is set, a large live room is radiated by electromagnetic waves through a transmitting antenna, and stirrers in the large live room and the small live room are started; (4) electric field average values Eout and Ein in a stirring period of the large live room and the small live room are measured; (5) the shielding effectiveness SE of the textile electromagnetic shielding material to be tested is calculated; (6) if it is judged that test frequency points in a required number are completed, a test is finished, and otherwise, the steps are repeated from the step (4). The method has the advantages that a test result is prevented from being affected by the hole and seam coupling effect of a test window, operation is simple and convenient, the method is more suitable for testing the capacity, for shielding the electromagnetic waves, of the textile electromagnetic shielding material to be tested which is stretched to different strengths and different shapes, the result is accurate, and the repeatability is good.

Description

technical field [0001] The invention relates to a method for testing the shielding effectiveness of fabric materials based on reverberation chamber conditions, and is especially suitable for testing the shielding effectiveness of fabric materials in reverberation chambers. Background technique [0002] With the rapid development of electronic information technology, the electromagnetic environment is deteriorating day by day, and the subsequent problem of electromagnetic interference is becoming more and more prominent. Fabric materials such as yarn blending are widely used in the fields of conductive fabric bags and anti-electromagnetic radiation clothing. Therefore, a correct evaluation of this The electromagnetic shielding ability of similar materials becomes particularly important. However, the traditional testing methods for shielding effectiveness of materials have gradually exposed some deficiencies, which cannot fully and objectively reflect their true electromagneti...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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IPC IPC(8): G01R31/00
Inventor 刘逸飞程二威陈永光王庆国赵敏曲兆明王研
Owner PEOPLES LIBERATION ARMY ORDNANCE ENG COLLEGE
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