CN201047041Y - Fabric electromagnetic radiation preventing performance tester - Google Patents
Fabric electromagnetic radiation preventing performance tester Download PDFInfo
- Publication number
- CN201047041Y CN201047041Y CNU2007201433087U CN200720143308U CN201047041Y CN 201047041 Y CN201047041 Y CN 201047041Y CN U2007201433087 U CNU2007201433087 U CN U2007201433087U CN 200720143308 U CN200720143308 U CN 200720143308U CN 201047041 Y CN201047041 Y CN 201047041Y
- Authority
- CN
- China
- Prior art keywords
- instrument
- electromagnetic radiation
- reflection
- electromagnetic
- test
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The utility model discloses a fabric electromagnetic-proof radiation performance test instrument, and the structure comprises a network analyzer, an emission source, a directional coupler, a reflection detection sensor, a sample shelf and a transmission detection sensor, and the network analyzer is provided with three waveguides, wherein, two waveguides are respectively connected with two ends of the sample shelf through the reflection detection sensor and the transmission detection sensor, and the third waveguide is connected with the reflection detection sensor through the emission source and the directional coupler. Compared with the prior art, the fabric electromagnetic-proof radiation performance test instrument of the utility model has the following beneficial effects: the present electromagnetic-proof radiation performance instrument which is used for testing fabrics only test the projection ability of the electromagnet waves generally and does not test the reflection and the absorption of the electromagnet waves, and in the process of researching and developing the instrument, the reflection and the absorption rate of the electromagnet waves are introduced, and a synthetic assessment of the fabric electromagnetic-proof radiation effect can be reached; 1GHz to 100GHz is chosen in the test range of a wave band of the electromagnet waves, and the daily domestic used electric appliances and mobile phones are generally in the wave band range, therefore, the protection effect of the fabrics for the electromagnetic radiation can be assessed more effectively.
Description
Technical field
The utility model relates to a kind of instrument for testing anti-electromagnetic radiation function of fabrics, specifically a kind of instrument for testing anti-electromagnetic radiation function of fabrics between the 1GHz-100GHz can the test frequency scope selected for use of selecting waveguide method scalar method for use.
Background technology
It is many that the textiles anti-electromagnetic radiation may get method of testing, but many method of testings are not all at the textiles special designs.At present, mainly contain following several method:
(1) waveguide method of testing
The waveguide method of testing can be divided into two kinds of method of testings of scalar sum vector.For the vector method of testing, can obtain the electric field of material and the vector expression in magnetic field, can obtain the real number item and the imaginary terms of the capacitivity (being dielectric constant) of material, the real number item and the imaginary terms of permeability, and extrapolate loss angle and fissipation factor, utilize formula, can derive absorptivity, transmitance, if only survey transmitance or reflectivity the two one of, relatively simple for structure, if survey simultaneously, must add distance mouthful between the two magic T pecker of waveguide and detailed design and all parts of adjustment but during test, press the reflectivity of the real number item calculating of capacitivity or permeability, transmitance, absorptivity must be revised through a series of complicated of waveguide parameter, and the correction conditions of every instrument is all inequality, and three's sum often occurs greater than 1 result.This method relatively is applicable to the research to the material electromagnetic parameter, and the whole test system expense is higher.For the scalar method of testing, can directly measure reflectivity, the transmitance of fabric or material, and estimate absorptivity, index is more directly perceived, is understood by most of people easily and accepts.Its reflectivity and transmission measurement result's correction ratio is easier to, so test result is more credible.The test macro expense will be hanged down than vector method.
(2) microwave camera bellows method of testing
Microwave camera bellows testing arrangement is to utilize scalar network analyzer, adopt special microwave camera bellows, the transmiting signal source of Network Analyzer is launched in camera bellows through the signal emission sensor, is all absorbed by camera bellows inwall wedge shape absorbing barrier except that through connect signal, and absorbs the secondary lobe of whole transmitted waves.Straight-through microwave main lobe arrives behind sample accepts sensor, is received to handle and show by Network Analyzer and can test various indexs eaily, as reflectivity, transmitance, and estimates absorptivity.The microwave dark room method on the one hand can be economical reach the effect similar with professional microwave dark room, on the other hand, can be used for testing the true effect of the material of bigger area, more approaching with actual conditions, especially the test anti-electromagnetic radiation textiles that can be quantitative and the result of use of clothes, the sample area size can be big tens times than waveguide, can overcome the little shortcoming of waveguide method of testing sample area.Simultaneously, also can with contrast use simultaneously with the waveguide method of testing.But microwave camera bellows method is subjected to the restriction of camera bellows size and wedge shape absorbing barrier size, can only survey the short and narrower shielding electromagnetic waves performance of wave spectrum scope of wavelength.
(3) microwave dark room method
This method is mainly tested transmissivity, in microwave dark room, four sides body of wall and ceiling, ground are all pasted wedge shape that high absorbing material makes and are inhaled ripple and split the shape material, signal generator is through the peripheral signal and the secondary lobe of transmission antennas transmit, all absorbed by six face wall ground surfaces, only direct signal arrives recipient through sample, can measure transmissivity.When test wave frequency when lower (wavelength is bigger), darkroom volume very big (for example cross section 8m * 8m * 30m etc.) absorbing wedge size also big (for example 20cm * 20cm * 95cm etc.).Signal source can be television set, micro-wave oven or common signal source, and recipient can be to leak the energy instrument, but this moment, test frequency was more single.People's on-the-spot demonstration outside the darkroom is arranged now, and this is the violation way of murther, must attach the importance and correct.
(4) wilderness method of testing
Building signal projector and antenna boundling in high and medium zone, wilderness makes secondary lobe dissipation in the wilderness avoid reflecting the microbeam that is reflected by sample to reach recipient and detect.When the high comparative sample work of plane reflection rate is placed at the sample place according to the sample contrast test, can measure the effective reflectivity of radar-reconnaissance, and be equivalent to the sectional dimension (claiming to reflect the cross section) of regular reflection thing by the strong and weak conversion of reflected signal.
(5) reflecting plate damped method
Reflecting plate attenuation test sources of law are detected the principle that reduces the reflection cross section in the anti-radar of aircraft, because transmitting range, standing wave position, back wave and incidence wave phase shift cause the decay of many principles such as decay, can't measure the reflectivity of material, be difficult to measure the absorptivity of material.
The utility model content
Technical problem to be solved of the present utility model is at the prior art weak point, a kind of instrument for testing anti-electromagnetic radiation function of fabrics is provided, according to the basic demand of electromagnetic protection with textiles, require method of testing not only can test transmitance, and can test reflectivity, absorptivity can promote to some extent to the mechanism of studying electromagnetic protection, on basis, select waveguide method scalar method for use to different method of testing comparative studies.Daily people contact maximum electromagnetic wave bands below 100GHz, therefore this instrument test frequency range is selected for use between the 1GHz-100GHz, while is at the particularity of garment material, tester can carry out different angles, diverse location conversion testing to sample, on specimen holder, carried out special design, in the hope of reaching its intended purposes and requirement.
The technical scheme that its technical problem that solves the utility model adopts is: instrument for testing anti-electromagnetic radiation function of fabrics, its structure comprises Network Analyzer, emission source, directional coupler, reflection detecting sensor, specimen holder, transmission detecting sensor, described Network Analyzer is provided with three waveguides, wherein two waveguides are respectively by reflecting the two ends that detecting sensor and transmission detecting sensor are connected in specimen holder, and the 3rd waveguide then is connected with the reflection detecting sensor with directional coupler by emission source.
Described Network Analyzer is the all-in-one that is formed by the comprehensive source of DIGITAL FREQUENCY, receiver, display, printer set, described receiver receives the information that three waveguides get on sample, give display through transmission signal after the processing in the comprehensive source of DIGITAL FREQUENCY, at last by the printer output data.
Its operating frequency of described Network Analyzer and emission source is set between the 1GHz-100GHz.
Described specimen holder is made multi-layer stacks with brass material in the chamber, is used for placing sample therebetween.
Between the described multi-layer stacks at a distance of 5cm.
Instrument for testing anti-electromagnetic radiation function of fabrics of the present utility model is compared with prior art, has following beneficial effect:
(1) instrument of the anti-electromagnetic radiation performance of existing test fabric is generally only tested the electromagnetic wave delivery capabilities, do not test electromagnetic reflection and absorption, in the research and development of this instrument, introduce electro-magnetic wave absorption and reflectivity, to reach overall merit to fabric anti-electromagnetic radiation effect.
(2) on the electromagnetic wave bands test specification, select 1GHz-100GHz, daily household electrical appliance and mobile phone generally all in this wavelength band, therefore more the effective evaluation fabric to the electromagnetic radiation protection effect.
Description of drawings
Accompanying drawing 1 is the structural representation of instrument for testing anti-electromagnetic radiation function of fabrics;
Accompanying drawing 2 is the schematic block circuit diagram of instrument for testing anti-electromagnetic radiation function of fabrics;
Accompanying drawing 3 is the specimen holder x-y planar structure schematic diagram of instrument for testing anti-electromagnetic radiation function of fabrics;
Accompanying drawing 4 is the specimen holder y-z planar structure schematic diagram of instrument for testing anti-electromagnetic radiation function of fabrics.
The specific embodiment
Next explain below with reference to Figure of description instrument for testing anti-electromagnetic radiation function of fabrics of the present utility model being done.
Instrument for testing anti-electromagnetic radiation function of fabrics of the present utility model, its structure comprises Network Analyzer 1, emission source 3, directional coupler 4, reflection detecting sensor 5, specimen holder 6, transmission detecting sensor 7, described Network Analyzer 1 is provided with three waveguides 2, wherein two waveguides are respectively by reflecting the two ends that detecting sensor 5 and transmission detecting sensor 7 are connected in specimen holder 6, and the 3rd waveguide then is connected with reflection detecting sensor 5 with directional coupler 4 by emission source 3; Described Network Analyzer 1 is the all-in-one that is formed by the comprehensive source of DIGITAL FREQUENCY, receiver, display, printer set, described receiver receives the information that three waveguides get on sample, give display through transmission signal after the processing in the comprehensive source of DIGITAL FREQUENCY, at last by the printer output data; Its operating frequency of described Network Analyzer and emission source is set between the 1GHz-100GHz; Described specimen holder is made multi-layer stacks 8 with brass material in 6 chambeies, is used for placing sample 9 therebetween; Between the described multi-layer stacks at a distance of 5cm.
Each major part function of instrument:
(1) Network Analyzer: adopt the Nanjing Pu Na science and technology equipment PNA of company 3610 Network Analyzers, has the lump type design, adopt the comprehensive source of DIGITAL FREQUENCY, receiver, display, printer all to place in the cabinet, self-organizing system can independently be finished signal power source and test assignment, simultaneously, the automaticity height, adopt menu in Chinese, use simple and flexible, data and curve can be printed automatically.Network Analyzer is the core in tester, and electromagnetic wave incident source (different frequency) both is provided, and detects electromagnetic reflection, transmission again automatically, and carries out frequency sweep automatically and follow the tracks of.Reflectivity, the transmitance of test sample by calculating, can be obtained the absorptivity of sample simultaneously.Its operating frequency is set between the 1GHz-100GHz.Test dynamic range: Insertion Loss (transmission) 70dB; Return loss (reflection) 50dB; Precision: little Insertion Loss resolution ratio is 0.01dB; Little reflection resolution ratio is 0.002dB.
(2) emission source: adopt the metal rectangular waveguide, TE
10Type, the Xi'an perseverance reaches microwave technology development company to be provided, and its sectional dimension is: a * b=107 * 64 (mm
2), its operating frequency is set at 1GHz～100GHz as requested.
(3) directional coupler, the Xi'an perseverance reaches microwave technology development company to be provided, and its main purpose is the desirable directionality that obtains in centre frequency.
(4) reflection detecting sensor, the Xi'an perseverance reaches microwave technology development company to be provided, the effect of attenuator is that the microwave energy by it is produced decay, level for through-put power in the constant transmissions system, must insert attenuator in the transmission system, by attenuator, microwave energy is produced quantitative decay.
(5) specimen holder, specimen holder connects the element of coaxial line and waveguide, if add signal at an end of coaxial line, the inner wire of the other end gos deep in the rectangular waveguide, the TEM in the coaxial line will motivate TE in the rectangular waveguide
10Mould; Vice versa; The conversion of implementation pattern.The inner wire of suitably regulating coaxial line insert Waveguide Depth and short-circuit end and inner wire apart from d, can so that the impedance of looking to the junction from coaxial line near the characteristic impedance of coaxial line, thereby reach impedance matching.
(6) transmission detecting sensor: terminate load commonly used has matched load and short circuit load, but the function of the two has nothing in common with each other.For matched load, be that all electromagnetic energies are all absorbed and areflexia, and short circuit load is that all electromagnetic energies are all reflected back, some energy do not absorb.
Long 107 * the 4mm of the size of specimen
2, the actual detected window size is 86 * 43mm
2, it can realize the electromagnetic radiation transmitance of three class sample states, the test of reflectivity specimen holder.
The first kind: the influence of test transmitance, reflectivity and standing wave node, in the waveguide sample chamber, make multi-layer stacks with brass material, vertical is the position that can place sample to dotted line among Fig. 3.Every interval 5mm can survey one group of data.Can understand the situation of standing wave, make the experimental result clear concept.
Second class: sample (see figure 3) in X-Y plane can be rotated, and sample that can cutting different rotary angle sandwiches by the normal position and to test.
The 3rd class: sample (see figure 4) in the Y-Z plane can be rotated, and specimen holder is designed in the Y-Z plane several samples folder to 0～45 ° of Y-axis angle.
The instrumentation flow process:
One, the selection of rays of electromagnetic radiation wave band:
Drive by neon lamp, knob is regulated the wave band knob, obtains the electromagnetic wave bands scope that needs.
Two, sampling: as requested, the cloth specimen of cutting 15cm * 7cm.
Three, cloth specimen is clipped on the specimen holder, puts into the neon bulb path.
Four, open network tester, by the piecewise analysis of instrument output wave, and single-chip microcomputer calculating, obtain fabric in this wave band, the electromagnetic wave projection ratio.
Five,, calculate electromagnetic wave at the fabric face reflectivity according to transmissivity.
Six, by printer, with the automatic printout of test result.
Claims (6)
1. instrument for testing anti-electromagnetic radiation function of fabrics, it is characterized in that: its structure comprises Network Analyzer, emission source, directional coupler, reflection detecting sensor, specimen holder, transmission detecting sensor, described Network Analyzer is provided with three waveguides, wherein two waveguides are respectively by reflecting the two ends that detecting sensor and transmission detecting sensor are connected in specimen holder, and the 3rd waveguide then is connected with the reflection detecting sensor with directional coupler by emission source.
2. instrument for testing anti-electromagnetic radiation function of fabrics according to claim 1, it is characterized in that: described Network Analyzer is the all-in-one that is formed by the comprehensive source of DIGITAL FREQUENCY, receiver, display, printer set, described receiver receives the information that three waveguides get on sample, give display through transmission signal after the processing in the comprehensive source of DIGITAL FREQUENCY, at last by the printer output data.
3. instrument for testing anti-electromagnetic radiation function of fabrics according to claim 1 and 2 is characterized in that: its operating frequency of described Network Analyzer and emission source is set between the 1GHz-100GHz.
4. instrument for testing anti-electromagnetic radiation function of fabrics according to claim 1 and 2 is characterized in that: described specimen holder is made multi-layer stacks with brass material in the chamber, is used for placing sample therebetween.
5. instrument for testing anti-electromagnetic radiation function of fabrics according to claim 4 is characterized in that: between the described multi-layer stacks at a distance of 5cm.
6. instrument for testing anti-electromagnetic radiation function of fabrics according to claim 4 is characterized in that: placing sample in the described specimen holder can arbitrarily place in three dimensions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201433087U CN201047041Y (en) | 2007-04-18 | 2007-04-18 | Fabric electromagnetic radiation preventing performance tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201433087U CN201047041Y (en) | 2007-04-18 | 2007-04-18 | Fabric electromagnetic radiation preventing performance tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201047041Y true CN201047041Y (en) | 2008-04-16 |
Family
ID=39299617
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201433087U Expired - Fee Related CN201047041Y (en) | 2007-04-18 | 2007-04-18 | Fabric electromagnetic radiation preventing performance tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201047041Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101526486B (en) * | 2009-04-20 | 2011-05-18 | 河北科技大学 | Anti-electromagnetic radiation textile simulating and testing instrument |
| CN102928715A (en) * | 2012-11-02 | 2013-02-13 | 中原工学院 | Device and method for testing intensity of electromagnetic waves reflected and transmitted by electromagnetic shielding fabrics |
-
2007
- 2007-04-18 CN CNU2007201433087U patent/CN201047041Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101526486B (en) * | 2009-04-20 | 2011-05-18 | 河北科技大学 | Anti-electromagnetic radiation textile simulating and testing instrument |
| CN102928715A (en) * | 2012-11-02 | 2013-02-13 | 中原工学院 | Device and method for testing intensity of electromagnetic waves reflected and transmitted by electromagnetic shielding fabrics |
| CN102928715B (en) * | 2012-11-02 | 2015-02-11 | 中原工学院 | Device and method for testing intensity of electromagnetic waves reflected and transmitted by electromagnetic shielding fabrics |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101289805A (en) | Instrument for testing anti-electromagnetic radiation function of fabrics | |
| CN106018438B (en) | A kind of anti-microwave property test macro of textile and method | |
| TWI491189B (en) | A millimeter wave test fixture for an integrated circuit device | |
| CN106160893B (en) | The test macro of wireless terminal and control method for it | |
| CN100495048C (en) | Device for measuring dielectric characteristics of dielectric material | |
| CN102928715B (en) | Device and method for testing intensity of electromagnetic waves reflected and transmitted by electromagnetic shielding fabrics | |
| CN101207881A (en) | Apparatus and method for testing mobile terminal near field radiation | |
| CN106936524B (en) | Test system of wireless terminal | |
| Eser et al. | Open-area test site (OATS) calibration | |
| CN201047041Y (en) | Fabric electromagnetic radiation preventing performance tester | |
| FR2809183B1 (en) | ELECTROMAGNETIC COMPATIBILITY TEST DEVICE | |
| CN108574540A (en) | A kind of electromagnetic wave room based on multichannel antenna | |
| CN101149417B (en) | Screen performance test method for veneer with built-in electromagnetic layer | |
| CN101207447B (en) | Method for testing mobile terminal radiating continuous disturbance indicators and system thereof | |
| CN203929924U (en) | Shield shield effectiveness tester | |
| CN201037855Y (en) | Textile electromagnetic radiation proof capability tester | |
| US20130251162A1 (en) | Audio monitoring device | |
| CN210927638U (en) | Wireless terminal signal testing device | |
| Krzysztofik et al. | Some Consideration on Shielding Effectiveness Testing by Means of the Nested Reverberation Chambers. | |
| CN211183962U (en) | Handheld radio frequency radiation immunity fault accurate diagnosis equipment | |
| Armstrong | Measurement of shielding in electrically large metallic enclosures | |
| CN209387884U (en) | The test device of shielding property | |
| CN209280913U (en) | Intelligent electric meter radiation immunity RES(rapid evaluation system) | |
| CN202393911U (en) | Direct-discharging type millimeter wave alternating-current imaging radiometer | |
| O'young et al. | Survey of techniques for measuring RF shielding enclosures |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080416 |