CN104360201A - Electromagnetic field shielding performance testing system for dust type dielectric materials - Google Patents
Electromagnetic field shielding performance testing system for dust type dielectric materials Download PDFInfo
- Publication number
- CN104360201A CN104360201A CN201410684971.2A CN201410684971A CN104360201A CN 104360201 A CN104360201 A CN 104360201A CN 201410684971 A CN201410684971 A CN 201410684971A CN 104360201 A CN104360201 A CN 104360201A
- Authority
- CN
- China
- Prior art keywords
- electromagnetic
- dust
- dielectric material
- field
- electromagnetic shielding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
The invention discloses an electromagnetic field shielding performance testing system for dust type dielectric materials, and relates to the technical field of dielectric material electromagnetic field shielding testing. The electromagnetic field shielding performance testing system comprises an electromagnetic wave signal source, high frequency signal lines, a power amplifier, an antenna, an electromagnetic shielding box, a dust type dielectric material box and an electromagnetic field tester. The electromagnetic wave signal source is connected with the power amplifier through one high frequency signal line, and the power amplifier is connected with the antenna through one high frequency signal line. A stirring fan is arranged in the dust type dielectric material box, and the dust type dielectric material box is fixed at an opening in one side of the electromagnetic shielding box. The electromagnetic field tester is connected with an electromagnetic shielding probe through a coaxial cable, the electromagnetic shielding probe stretches into the electromagnetic shielding box, and the electromagnetic shielding probe and the dust type dielectric material box are placed at the opposite positions. By means of the electromagnetic field shielding performance testing system for dust type dielectric materials, the electromagnetic shielding effectiveness of dust can be tested, and theoretical and technological support is provided for preparing composite electromagnetic shielding materials; the structure is simple, operating is convenient, and implementation is easy.
Description
Technical field
The present invention relates to the electromagnetic-field-shielded technical field of measurement and test of dielectric material.
Background technology
Along with high frequency, the digitizing of electronic equipment, the energy density of undesired signal extremely increases, and unprecedented deterioration occurs the electromagnetic environment of the finite space, has a strong impact on the coordination of society advancement and human survival and ecologic environment, sustainable development.Therefore, the research and development of electromagnetic shielding material becomes the important topic of people's growing interest.Along with the development of science and technology, the research of Combined Electromagnetic Shielding Materials is towards high shield effectiveness, low-density future development.
Namely electromagnetic screen is utilize the proper property of conduction or magnetic conduction class material to be limited in by the electromagnetic wave energy of radiation in instrument or equipment in the space of a certain regulation or the dosage range of a certain regulation.Its objective is and adopt shield to surround electromagnetic interference source, suppress electromagnetic interference source to the interference of the receiver of surrounding space, or adopt shield to surround receiver, to avoid interference source, interference is caused to it.In early days, people add the metal powders such as the good silver powder of electric conductivity, copper powder and nickel powder in the polymer and make conductive filler, prepare filled-type electromagnetic shielding material with macromolecule matrix is blended.Because metallic particles itself has low-down resistivity, (resistivity is 10
-3below Ω cm), when thus filling in a large number, compound substance possesses good shield effectiveness, and especially when using silver powder to make conductive filler, the shielding properties of compound substance is particularly outstanding.
Carbon black filler has a wide range of applications in the polymer.The factor affecting carbon black conductive performance is a lot, mainly contains the particle size of carbon black, structure composition, configuration of surface etc.The application of carbon black in conducting polymer field mainly concentrates in the modification of carbon black and the exploitation two of novel conductive carbon black.The Super Conductive carbon black of Cabot company of the U.S., the Conductex 40-220 carbon black etc. of Columbian Chemicals Co. is special efficient ultrafine electricity conductive carbon black.Mitsubishi changes into company and uses new-type carbon black to mix with polypropylene, and the shielding material density of preparation is only 1.18 g/cm
3, be described as electromagnetic shielding material the lightest in the world.
Dust is as electromagnetic shielding material or filler, and the test of its capability of electromagnetic shielding is the technical barrier that puzzlement is measured always, and the present invention is intended to solve this test difficult problem, for electromagnetic screen test and composite electromagnetic shield materials preparation provide reliable experimental basis.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of dust-like dielectric material electromagnetic-field-shielded property test macro, can test the electromagnetic-field-shielded usefulness of dust-like dielectric material, for composite electromagnetic shield materials preparation provides Theory and technology to support, structure is simple, it is accurate, easy to operate to test, be easy to realization.
For solving the problems of the technologies described above, the technical solution used in the present invention is:
A kind of dust-like dielectric material electromagnetic-field-shielded property test macro, comprises electromagnetic wave signal source, high-frequency signal line, power amplifier, antenna, electromagnetic shielding box, dust-like dielectric material case and electromagnetic field tester; Described electromagnetic wave signal source is connected with power amplifier by high-frequency signal line, and power amplifier is connected with antenna by high-frequency signal line; Be provided with agitation fan in dust-like dielectric material case, dust-like dielectric material case is fixed on the opening part of electromagnetic shielding box side; Electromagnetic field tester is connected with electromagnetic screen probe by coaxial wire, and electromagnetic screen probe puts in electromagnetic shielding box, and electromagnetic screen probe is in relative position with dust-like dielectric material case.
Further technical scheme, described antenna is electromagnetic horn.
Further technical scheme, being centrally located on same level line of described electromagnetic screen probe, dust-like dielectric material case and antenna.
Further technical scheme, described agitation fan is provided with stirring motor and adjustable power of direct current, and described stirring motor is connected with adjustable power of direct current by coaxial wire.
Further technical scheme, described agitation fan is positioned at bottom dust-like dielectric material case.
Further technical scheme, described dust-like dielectric material case is organic glass case.
Further technical scheme, the front and rear wall up and down of described dust-like dielectric material case is electromagnetic shielding material, and form an electromagnetic screen passage, the left and right sides is non-electromagnetic shielding material.
The beneficial effect adopting technique scheme to produce is: the present invention can assess the electromagnet shield effect of dust-like dielectric material; The electromagnet shield effect impact experiment of different dusts density, different dusts material can be carried out, thus set up dust shield effectiveness and soot density relational expression; Comparatively comprehensively can be grasped the capability of electromagnetic shielding of dust dielectric material by this device, solve the technical matters of dust electromagnet shield effect test, for composite electromagnetic shield materials preparation provides Theory and technology to support; Structure is simple, it is accurate, easy to operate to test, be easy to realize.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
In the accompanying drawings: 1, electromagnetic wave signal source, 2, high-frequency signal line, 3, power amplifier, 4, antenna, 5, adjustable power of direct current, 6, stirring motor, 7, coaxial wire, 8, agitation fan, 9, electromagnetic shielding box, 10, dust-like dielectric material case, 11, floating dust, 12, electromagnetic screen probe, 13, A-frame, 14, electromagnetic field tester, 15, dust-like dielectric material box bracket.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
As shown in Figure 1, dust-like dielectric material electromagnetic-field-shielded property test macro, comprises electromagnetic wave signal source 1, high-frequency signal line 2, power amplifier 3, antenna 4, electromagnetic shielding box 9, dust-like dielectric material case 10 and electromagnetic field tester 14.Electromagnetic wave signal source 1 is connected with power amplifier 3 by high-frequency signal line 2, and power amplifier 3 is connected with antenna 4 by high-frequency signal line 2, and antenna 4 is electromagnetic horn, and antenna 4 is fixed on level ground by A-frame 13.Dust-like dielectric material case 10 can be organic glass case, also can be upper and lower front and rear wall is electromagnetic shielding material, and the left and right sides is the cuboid casing of non-electromagnetic shielding material.Bottom in dust-like dielectric material case 10 is provided with agitation fan 8, dust-like dielectric material case 10 is fixed on the opening part of electromagnetic shielding box 9 side, a part for dust-like dielectric material case 10 puts in electromagnetic shielding box 9, the part dust-like dielectric material box bracket 15 do not put in window supports, and is fixed on window to make dust-like dielectric material case 10.Agitation fan 8 is provided with stirring motor 6 and adjustable power of direct current 5, and stirring motor 6 is connected with adjustable power of direct current 5 by coaxial wire 7.Electromagnetic field tester 14 is connected with electromagnetic screen probe 12 by coaxial wire 7, electromagnetic screen probe 12 puts in electromagnetic shielding box 9, electromagnetic screen probe 12 is fixed on the A-frame 13 in electromagnetic shielding box 9, being centrally located on same level line of electromagnetic screen probe 12, dust-like dielectric material case 10 and antenna 4.
The principle of this device is: the electromagnetic wave signal of the certain frequency that electromagnetic wave signal source 1 produces amplifies through power amplifier 3, the electromagnetic wave signal amplified is transmitted into space by antenna 4, electromagnetic wave signal forms electromagnetic field, electromagnetic field enters in electromagnetic shielding box 9 through the floating dust 11 in dust-like dielectric material case 10, electromagnetic screen probe 12 in electromagnetic shielding box 9 detects the electromagnetic field intensity in electromagnetic shielding box 9, and the signal detected is sent to electromagnetic field tester 14 by coaxial wire 7 and detects by electromagnetic screen probe 12 again; Adjustable power of direct current 5 controls stirring motor 6 by coaxial wire 7 and drives agitation fan 8 to rotate, and makes the dust bottom dust-like dielectric material case 10 floating; Namely the difference that the floating front and back of dust test electromagnetic intensity is respectively the electromagnet shield effect of floating dust 11.
Dust of the present invention can be the molecules such as airborne dust, smog, graphite dust.Use the present invention, the electromagnet shield effect impact experiment of different dusts density, different dusts material can be carried out, thus set up the expression formula of dust shield effectiveness and soot density relation; The capability of electromagnetic shielding of dust dielectric material comparatively comprehensively can be grasped, for composite electromagnetic shield materials preparation provides Theory and technology to support by this device.
Claims (7)
1. a dust-like dielectric material electromagnetic-field-shielded property test macro, is characterized in that comprising electromagnetic wave signal source (1), high-frequency signal line (2), power amplifier (3), antenna (4), electromagnetic shielding box (9), dust-like dielectric material case (10) and electromagnetic field tester (14); Described electromagnetic wave signal source (1) is connected with power amplifier (3) by high-frequency signal line (2), and power amplifier (3) is connected with antenna (4) by high-frequency signal line (2); Be provided with agitation fan (8) in dust-like dielectric material case (10), dust-like dielectric material case (10) is fixed on the opening part of electromagnetic shielding box (9) side; Electromagnetic field tester (14) is connected with electromagnetic screen probe (12) by coaxial wire (7), and electromagnetic screen probe (12) puts in electromagnetic shielding box (9), and electromagnetic screen probe (12) and dust-like dielectric material case (10) are in relative position.
2. dust-like dielectric material according to claim 1 electromagnetic-field-shielded property test macro, is characterized in that described antenna (4) is electromagnetic horn.
3. dust-like dielectric material according to claim 1 electromagnetic-field-shielded property test macro, is characterized in that being centrally located on same level line of described electromagnetic screen probe (12), dust-like dielectric material case (10) and antenna (4).
4. dust-like dielectric material according to claim 1 electromagnetic-field-shielded property test macro, it is characterized in that described agitation fan (8) is provided with stirring motor (6) and adjustable power of direct current (5), described stirring motor (6) is connected with adjustable power of direct current (5) by coaxial wire (7).
5. dust-like dielectric material according to claim 1 electromagnetic-field-shielded property test macro, is characterized in that described agitation fan (8) is positioned at dust-like dielectric material case (10) bottom.
6. the dust-like dielectric material electromagnetic-field-shielded property test macro according to claim 1,2,3,4 or 5, is characterized in that described dust-like dielectric material case (10) is organic glass case.
7. the dust-like dielectric material electromagnetic-field-shielded property test macro according to claim 1,2,3,4 or 5, the front and rear wall up and down that it is characterized in that described dust-like dielectric material case (10) is electromagnetic shielding material, form an electromagnetic screen passage, the left and right sides is non-electromagnetic shielding material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410684971.2A CN104360201B (en) | 2014-11-25 | 2014-11-25 | The electromagnetic-field-shielded property test system of dust-like material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410684971.2A CN104360201B (en) | 2014-11-25 | 2014-11-25 | The electromagnetic-field-shielded property test system of dust-like material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104360201A true CN104360201A (en) | 2015-02-18 |
| CN104360201B CN104360201B (en) | 2017-06-27 |
Family
ID=52527483
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410684971.2A Active CN104360201B (en) | 2014-11-25 | 2014-11-25 | The electromagnetic-field-shielded property test system of dust-like material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104360201B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113484633A (en) * | 2021-06-07 | 2021-10-08 | 中国工程物理研究院应用电子学研究所 | Shielding effectiveness test system and method suitable for electromagnetic protection performance test of artificial material |
| CN113533883A (en) * | 2021-06-29 | 2021-10-22 | 中国工程物理研究院应用电子学研究所 | System and method for testing electromagnetic shielding effectiveness of artificial material based on common-aperture antenna array |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001267782A (en) * | 2000-03-21 | 2001-09-28 | Shimadzu Corp | Electromagnetic wave absorbing shield material |
| CN202916362U (en) * | 2012-11-06 | 2013-05-01 | 西安开容电子技术有限责任公司 | Device for testing the shielding effectiveness of small shielding cavity |
| CN103308798A (en) * | 2013-05-27 | 2013-09-18 | 华北电力大学 | Method for testing shielding effectiveness of electromagnetic shielding material |
| CN103777099A (en) * | 2014-01-24 | 2014-05-07 | 中国人民解放军军械工程学院 | Method for testing textile material shielding effectiveness based on live room condition |
| CN204214967U (en) * | 2014-11-25 | 2015-03-18 | 中国人民解放军军械工程学院 | Dust-like material electromagnetic-field-shielded property test macro |
-
2014
- 2014-11-25 CN CN201410684971.2A patent/CN104360201B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001267782A (en) * | 2000-03-21 | 2001-09-28 | Shimadzu Corp | Electromagnetic wave absorbing shield material |
| CN202916362U (en) * | 2012-11-06 | 2013-05-01 | 西安开容电子技术有限责任公司 | Device for testing the shielding effectiveness of small shielding cavity |
| CN103308798A (en) * | 2013-05-27 | 2013-09-18 | 华北电力大学 | Method for testing shielding effectiveness of electromagnetic shielding material |
| CN103777099A (en) * | 2014-01-24 | 2014-05-07 | 中国人民解放军军械工程学院 | Method for testing textile material shielding effectiveness based on live room condition |
| CN204214967U (en) * | 2014-11-25 | 2015-03-18 | 中国人民解放军军械工程学院 | Dust-like material electromagnetic-field-shielded property test macro |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113484633A (en) * | 2021-06-07 | 2021-10-08 | 中国工程物理研究院应用电子学研究所 | Shielding effectiveness test system and method suitable for electromagnetic protection performance test of artificial material |
| CN113484633B (en) * | 2021-06-07 | 2023-04-21 | 中国工程物理研究院应用电子学研究所 | Shielding efficiency test system and method suitable for electromagnetic shielding performance test of artificial material |
| CN113533883A (en) * | 2021-06-29 | 2021-10-22 | 中国工程物理研究院应用电子学研究所 | System and method for testing electromagnetic shielding effectiveness of artificial material based on common-aperture antenna array |
| CN113533883B (en) * | 2021-06-29 | 2023-06-23 | 中国工程物理研究院应用电子学研究所 | Artificial material electromagnetic shielding effectiveness test system and method based on common aperture antenna array |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104360201B (en) | 2017-06-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Li et al. | Electrical conductivity and electromagnetic interference shielding characteristics of multiwalled carbon nanotube filled polyacrylate composite films | |
| Kim et al. | Electromagnetic interference shielding characteristics and shielding effectiveness of polyaniline-coated films | |
| Shu et al. | Synthesis of nitrogen-doped reduced graphene oxide/magnesium ferrite/polyaniline composite aerogel as a lightweight, broadband and efficient microwave absorber | |
| Abbas et al. | Multi-walled carbon nanotube/polyethersulfone nanocomposites for enhanced electrical conductivity, dielectric properties and efficient electromagnetic interference shielding at low thickness | |
| Nasouri et al. | Theoretical and experimental studies on EMI shielding mechanisms of multi-walled carbon nanotubes reinforced high performance composite nanofibers | |
| Udmale et al. | Development trends in conductive nano-composites for radiation shielding | |
| CN105111913A (en) | Graphene/nano ferrite based water electromagnetic shielding paint and preparation method thereof | |
| CN105331264A (en) | Composite electromagnetic shielding paint based on nano carbon material | |
| Baskey et al. | Investigation on the dielectric properties of exfoliated graphite-silicon carbide nanocomposites and their absorbing capability for the microwave radiation | |
| Kim et al. | Microwave absorption and shielding property of Fe–Si–Al alloy/MWCNT/polymer nanocomposites | |
| Pawar et al. | Extraordinary synergy in attenuating microwave radiation with cobalt‐decorated graphene oxide and carbon nanotubes in polycarbonate/poly (styrene‐co‐acrylonitrile) blends | |
| CN104360201A (en) | Electromagnetic field shielding performance testing system for dust type dielectric materials | |
| Wang | Investigation of electromagnetic shielding effectiveness of nanostructural carbon black/ABS composites | |
| CN204214967U (en) | Dust-like material electromagnetic-field-shielded property test macro | |
| Zhou et al. | Synthesis and electromagnetic interference shielding effectiveness of ordered mesoporous carbon filled poly (methyl methacrylate) composite films | |
| Zhou et al. | Dielectric properties and electromagnetic interference shielding effectiveness of Al2O3-based composites filled with FeSiAl and flaky graphite | |
| Al-Ghamdi et al. | Natural rubber based composites comprising different types of carbon-silica hybrid fillers. Comparative study on their electric, dielectric and microwave properties, and possible applications | |
| Zhang et al. | Study on material of polymer-based electromagnetic shielding composites | |
| Bel et al. | Improvement of thermal stability and gamma‐ray absorption in microwave absorbable poly (methyl methacrylate)/graphene nanoplatelets nanocomposite | |
| Arooj et al. | Polymeric Fe3O4 nanoparticle/carbon nanofiber hybrid nanocomposite coatings for improved terahertz shielding | |
| CN101901286A (en) | Modeling method for leading cable and chassis to be equivalent to interference sources under complex electromagnetic environment | |
| CN204331002U (en) | A kind of magnetic field measuring device | |
| Bäßler et al. | One-dimensional edge transport on the surface of cylindrical BixTe3− ySey nanowires in transverse magnetic fields | |
| Shakir et al. | Fabrication and EMI (electromagnetic interference) shielding performance of polyester fabrics coated with polyaniline via in-situ polymerization | |
| Senyk et al. | Composite materials for protection against electromagnetic microwave radiation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |