CN106443287A - Coaxial device for testing property of field-sensitive electromagnetic pulse protection material - Google Patents
Coaxial device for testing property of field-sensitive electromagnetic pulse protection material Download PDFInfo
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- CN106443287A CN106443287A CN201611112271.1A CN201611112271A CN106443287A CN 106443287 A CN106443287 A CN 106443287A CN 201611112271 A CN201611112271 A CN 201611112271A CN 106443287 A CN106443287 A CN 106443287A
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- outer conductor
- coaxial
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- conductor
- inner wire
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/001—Measuring interference from external sources to, or emission from, the device under test, e.g. EMC, EMI, EMP or ESD testing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
- G01R1/0416—Connectors, terminals
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Abstract
The invention discloses a coaxial device for testing the property of a field-sensitive electromagnetic pulse protection material. The coaxial device comprises a broadband continuous conductor coaxial clamp, an organic glass cylinder, end covers and reinforcing rings, wherein the coaxial clamp is divided into two parts comprising an inner conductor and an outer conductor; the inner conductor and the outer conductor are in threaded connection with each other; the inner conductor and the outer conductor are connected with each other via a polytetrafluoroethylene insulation medium support body; micro holes are punched in the inner conductor, the outer conductor and the medium support body. When the coaxial device is used, a ring-shaped material is placed in a cavity formed by the inner conductor and the outer conductor of the coaxial clamp; then the coaxial clamp is placed in the sealed organic glass cylinder filled with high-pressure insulation gas; the phenomenon that the material surface is discharged because of strong field irradiation can be avoided, so that the phase change property of the field-sensitive electromagnetic pulse protection material can be accurately determined.
Description
Technical field
The present invention relates to electromagnetic compatibility experimental technique field, more particularly, to one kind are used for field sensitive type Spark gap material
The coaxial device of material performance test.
Background technology
Preferably field sensitive type environment self-adaption Spark gap material is insulant in the case of low field intensity, to electricity
Magnetic wave does not have shielding action, and when by the interference of outside strong electromagnetic pulse or attack, that is, external electromagnetic field significantly increases suddenly
Plus and when exceed certain critical field strength, due to the distinctive electrochemistry of material and energy-structure feature, external electromagnetic can be perceived
The change of environment, can insulate in micro- nanoseconds/conductive phase transition phenomena, electrical conductivity lifting 102～105The order of magnitude, makes
Material for insulator rapidly goes to the metalloid material of high connductivity at ordinary times, produces high reflection and shielding to external electromagnetic wave, will
Outside protective casing, after external disturbance and attack high field disappearance, material returns to original strong electromagnetic pulse energy barrier
State, solves the contradiction between electronics normal work and high field protection.And the electromagnetism developed based on this working mechanism
Protective material can undergo phase transition within the time of micro-nano second, accordingly do not tested and cannot know, and this kind of electromagnetism
Protective material belongs to new material in itself, and how to test its insulator/conductor phase transition performance under strong electromagnetic pulse does not also have phase
Close report.
Material is occurring insulator in the phase transition process of conductor, and its dynamic property will be reflected directly in electromagnetic pulse
On shield effectiveness.Before phase transformation, material is insulator, and almost electromagnetic pulse is not risen with any shielding action, and electromagnetic pulse will
Pass through shield；After phase transition, material is conductor, will play very big shielding action to electromagnetic pulse.Therefore, estimate
Field induced phase transition material its Electro-Magnetic pulse Shielding efficiency before and after phase transformation will occur great change.Effect is shielded by test material
Can, just can achieve quick judgement and the preliminary assessment that material be whether there is with phase transition phenomena.
In the method for test material shield effectiveness, the Materials ' Shielding Effectiveness such as window technique that existing standard is given, coaxial method
Method of testing can only obtain the frequency domain mask efficiency of material under the conditions of continuous wave, and high-power electromagnetic impulse disturbances effect is ground
Study carefully and show, only the frequency domain mask efficiency with shielding material can't characterize its shield effectiveness to time domain impulse field completely.At present
Research both domestic and external is the waveform parameter by time domain impulse before and after shielding first（Rising edge, pulsewidth and peak value etc.）On change
The change of change and energy, to define electromagnetic pulse time domain shield effectiveness, then obtains time domain screen by direct or indirect means
Cover the value of efficiency.Directly means include：Using the method for the radiant type antenna such as TEM electromagnetic horn, it is based on fibre-optic transmission system (FOTS)
The method of electromagnetic pulse simulator, the method using TEM room or GTEM room and " Specimen Method " etc.；Indirectly means are then main
It is the value of known frequency domain mask efficiency, the method that waveform reconstruction is carried out by minimum phase method or vector fitting etc..
Above method of testing all has a premise, that is, the material tested does not occur phase in whole test process
Become, and part measuring method is to carry out under feeble field or continuous wave environment, therefore said method be not properly suited for field
Cause the test of phase-change material, need to improve design.
Content of the invention
The technical problem to be solved is to provide a kind of field sensitive type Spark gap material property that is used for survey
The coaxial device of examination, tests to measured material by using this device, solves existing test system and is not suitable for field sensitive
The problem of type microwave defense material phase transition performance test.
For solving above-mentioned technical problem, the technical solution used in the present invention is：One kind is used for field sensitive type electromagnetic pulse
The coaxial device of protective material performance test, including broadband continuous conductor coaxial holder, plexiglass cylinder, end cap and reinforcing circle
Ring, described plexiglass cylinder two ends are embedded in end cap respectively, and broadband continuous conductor coaxial holder is supported horizontally inside lucite circle
In cylinder and run through the two ends of end cap and fix by means respectively of reinforcing annulus, broadband continuous conductor coaxial holder includes being co-axially mounted
Inner wire and outer conductor, inner wire by means of PTFE medium supporter coaxial support in outer conductor axially extending bore,
Described outer conductor includes symmetrically arranged outer conductor supporting section, outer conductor left connection part and outer conductor right connection part, and outer conductor is left
Linkage section and outer conductor right connection part coaxial threaded connect, and two sections of outer conductor supporting sections are respectively and fixedly installed to the left connection of outer conductor
Duan Zuoduan and outer conductor right connection part right-hand member, described inner wire includes inner wire left connection part and the right company of inner wire axially docked
Connect section, PTFE medium supporter, inner wire are installed between the endoporus of inner wire left connection part and outer conductor left connection part
Right connection part and outer conductor are by installation PTFE medium supporter, a left side for inner wire left connection part between the endoporus of linkage section
The right-hand member of end and inner wire right connection part docks inner wire linkage section respectively.
Described outer conductor supporting section side wall is provided with radial direction through hole, described plexiglass cylinder both ends of the surface are respectively provided with for
The first annular groove of O-ring seals is installed, the inner face of described reinforcing annulus be provided with for O-ring seals are installed second
Ring-shaped groove, the threaded one end that reinforcing annulus (1) passes end cap with outer conductor supporting section is connected.
Described inner conductor outer diameter is 5.65mm, and outer conductor diameter of bore is 13mm, broadband continuous conductor coaxial holder end
It is connected with coaxial cable using N-type coaxial connector.
At the Support Position of PTFE medium supporter between outer conductor and inner wire, the impedance of coaxial line is 50
Ω, digs an annular groove on Supporting Media with air interface, forms small inductor to compensate discontinuity capacitance, annular groove
Depth and width be respectively 0.46mm and 3.42mm.
Have the beneficial effects that using produced by technique scheme：
（1）Coaxial test device is the novel coaxial fixture through insulating Design, is had by filling the airtight of High-Voltage Insulation gas
Machine glass cylinder and the coaxial holder composition being placed in one.This test device frequency domain is functional：Upper limiting frequency 10.23GHz,
In the range of 0 ~ 8GHz, return loss is less than 20dB, can effectively transmit electromagnetic pulse.Meanwhile, this test device have larger
Dynamic range：Pulse source output peak impulse voltage is 10V ~ 4.1kV, is computed the electric field intensity scope within coaxial device
It is about 2kV/m ~ 871kV/m.Due to the many doped metal ions of field sensitive type Spark gap material internal, in coaxial holder
It is easily caused material surface electric discharge during by strong electromagnetic pulse and affect material phase transformation performance and judged, and in novel coaxial fixture
Insulation gas filled, this phenomenon can be effectively prevented from it is ensured that in the range of Larger Dynamic to material under strong electromagnetic pulse
Phase-change characteristic is accurately measured.
（2）The test system being made up of this coaxial test device can easily judgement material phase transition phenomena, calculate material
Phase transformation field intensity threshold value and response time.Material was dielectric before non-phase transformation, did not affect electromagnetic pulse in coaxial holder
Transmission, so on oscillograph display waveform should be consistent with pulse source output waveform；Material is to have one after phase transformation
Determine the conductor of electrical conductivity, there is to electromagnetic pulse certain shield effectiveness, the waveform of display will occur therefore on oscillograph
Change, can easily be calculated material phase transformation field intensity threshold value according to the input pulse voltage peak in change moment, and according to
Waveform after change can measure the response time obtaining material.Oscillograph is up to the sample rate of 20GHz, can differentiate ps magnitude
Rising edge it is sufficient to follow the trail of measurement material phase transformation response time.
Brief description
The present invention is further detailed explanation with reference to the accompanying drawings and detailed description.
Fig. 1 is the structural representation of the present invention；
Fig. 2 is test principle block diagram；
Wherein：1st, reinforce annulus；2nd, end cap；3rd, plexiglass cylinder；4th, outer conductor supporting section；5th, inner wire linkage section；6th, gather
Tetrafluoroethene dielectric support body；7th, outer conductor left connection part；8th, inner wire left connection part；9th, outer conductor right connection part；10th, interior lead
Body right connection part；11st, air-filled pore；12nd, air gauge installing hole；13rd, first annular groove；14th, the second ring-shaped groove.
Specific embodiment
Below in conjunction with the accompanying drawings, the technical scheme in the present invention is specifically described it is clear that described embodiment only
It is a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill
The every other embodiment that personnel are obtained under the premise of not making creative work, broadly falls into the scope of protection of the invention.
Elaborate a lot of details in the following description in order to fully understand the present invention, but the present invention is acceptable
To be implemented different from alternate manner described here using other, those skilled in the art can be without prejudice to intension of the present invention
In the case of do similar popularization, therefore the present invention is not limited by following public specific embodiment.
As shown in figure 1, it is the invention discloses a kind of coaxial for field sensitive type Spark gap material properties test
Device includes broadband continuous conductor coaxial holder, plexiglass cylinder 3, end cap 2 and reinforces annulus 1, described plexiglass cylinder 3
Two ends are embedded in end cap 2 respectively, and broadband continuous conductor coaxial holder is supported horizontally inside in plexiglass cylinder and runs through the two of end cap
End is fixing by means respectively of reinforcing annulus 1, and broadband continuous conductor coaxial holder includes coaxial mounted inner wire and outer conductor, interior
By means of PTFE medium supporter 6 coaxial support in outer conductor axially extending bore, described outer conductor includes symmetrically conductor
The outer conductor supporting section 4 of setting, outer conductor left connection part 7 and outer conductor right connection part 9, outer conductor left connection part 7 and outer conductor
Right connection part 9 coaxial threaded connects, and two sections of outer conductor supporting sections 4 are respectively and fixedly installed to outer conductor left connection part 7 left end with outward
Conductor right connection part 9 right-hand member, described inner wire includes inner wire left connection part 8 and the inner wire right connection part 10 axially docking,
PTFE medium supporter 6 is installed between the endoporus of inner wire left connection part 8 and outer conductor left connection part 7, inner wire is right
Linkage section 10 and outer conductor are by installation PTFE medium supporter 6, inner wire left connection part between the endoporus of linkage section 9
(8) left end and the right-hand member of inner wire right connection part 10 dock inner wire linkage section 5 respectively.It is lucite by inflating nozzle
It is filled with High-Voltage Insulation gas, air gauge shows the gas pressure being filled with cylinder.Outer conductor and insulated support are all equipped with
Aperture is it is ensured that gas surrounds inner wire and subject material completely, thus avoiding material surface electric discharge phenomena.
The inner conductor outer diameter of coaxial holder is 5.65mm, outer conductor internal diameter is 13mm, and upper limiting frequency is 10.23GHz.Coaxially
Wire holder end is connected with cable using N-type coaxial connector base, and the present invention selects N-50KF adapter, its inner wire core
A diameter of 3.04mm, outer conductor internal diameter is 7mm.The place of coaxial linear dimension mutation can produce discontinuous ladder electric capacity, processes not
Strong reflection can be caused well, reduce the performance of coaxial wire holder.Inner conductors of the present invention are formed using axial step dislocation mode
Small inductor compensating discontinuity capacitance.Change position in internal and external conductor radius, to seamed edge rounding, to weaken its position
The field intensity at place, prevents point discharge.
Supporting Media adopts politef, relative dielectric constant, thicknessd=4mm.Due to Supporting Media
Exist, change the characteristic impedance placed at Supporting Media position.For ensureing that coaxial holder characteristic impedance is 50 Ω, Supporting Media
The depth of immersion outer conductor and inner wire is set to 0.7mm and 0.64mm.For reducing discontinuity capacitance further, reduce in width
Reflection on frequency band, digs an annular groove on Supporting Media with air interface, forms small inductor to compensate discontinuous electricity
Hold, the depth of annular grooveWAnd widthLIt is set to 0.46mm and 3.42mm through calculating with simulation optimization.
For convenience of good electrical connection between clamping material and holding material and coaxial wire holder, will centered on clamping material
Internal and external conductor is divided into dismountable two parts, and two-part outer conductor to fix material by screwing of screw thread, two-part interior
Conductor then passes through bolt tongue and the groove of same depth keeps connecting.It is 3mm that this fixture can test internal diameter, external diameter 41mm, thickness
Less than the circular material of 5mm, high-frequency noise simulator, novel coaxial test dress are included using the test system of this device composition
Put, attenuator and oscillograph, described high-frequency noise simulator signal output part connects coaxial test device letter by coaxial cable
Number input port, described test device signal output port connects attenuator, and attenuator signal outfan connects oscilloscope signal
End（Referring to accompanying drawing 2）.
Before being tested, need first to carry out checking test, judge whether test device itself produces shadow to test result
Ring, the method for judgement is：In the case of test device not carrying material, input a side to the signal input port of test device
Ripple signal, if test device has good impedance matching and high pressure resistant property, then by test device signal output
The output signal that port shows on oscillograph should be completely the same with former input square wave, and this also demonstrates that this test device will not shadow
Ring the test to measured material characteristic.By verification experimental verification, the amplitude of input waveform and output waveform, pulse width, rising edge
All consistent.
During test, test material is fixed in coaxial holder, is filled with High-Voltage Insulation gas simultaneously, adjust high-frequency noise mould
Intend output voltage and the pulse width of device, provide input waveform for test device, so that measured material is under a uniform field intensity,
Output waveform is observed by oscillograph, if output waveform is consistent with former input waveform, that is, measured material is also in insulation
State, measured material not its effect in test circuit, then progressively heighten the voltage of input waveform, and then improve measured material
Residing field intensity, if output waveform there occurs change, just explanation measured material by original M Ω level in a short period of time under
Drop to hundred Ω levels, its response time can be calculated by observing the change of output waveform, the field intensity changing exactly can make
The field intensity threshold value that measured material undergoes phase transition.
In a word, the present invention passes through insulating Design, it is to avoid due to material surface under the effect of high field electromagnetic pulse electric discharge and
The problem affecting material phase transformation characteristic is judged.There is provided square-wave signal using high-frequency noise simulator, oscillograph is as aobvious
The test system that showing device is constituted, compared with existing test system, has that structure is simple, small volume, frequency band range width, dynamic model
Enclose big, can be used for high field pulse test and test result is reproducible and degree of stability is high advantage.
Claims (4)
1. a kind of coaxial device for field sensitive type Spark gap material properties test it is characterised in that：Including broadband
Continuous conductor coaxial holder, plexiglass cylinder（3）, end cap（2）With reinforcing annulus（1）, described plexiglass cylinder（3）Two ends
It is embedded in end cap respectively（2）, broadband continuous conductor coaxial holder is supported horizontally inside in plexiglass cylinder and runs through the two ends of end cap
By means respectively of reinforcing annulus（1）Fixing, broadband continuous conductor coaxial holder includes coaxial mounted inner wire and outer conductor, interior
Conductor is by means of PTFE medium supporter（6）In outer conductor axially extending bore, it is right that described outer conductor includes coaxial support
Claim the outer conductor supporting section of setting（4）, outer conductor left connection part（7）With outer conductor right connection part（9）, outer conductor left connection part
（7）With outer conductor right connection part（9）Coaxial threaded connects, two sections of outer conductor supporting sections（4）It is respectively and fixedly installed to outer conductor left
Linkage section（7）Left end and outer conductor right connection part（9）Right-hand member, described inner wire includes the inner wire left connection part axially docking
（8）With inner wire right connection part（10）, inner wire left connection part（8）With outer conductor left connection part（7）Endoporus between install poly-
Tetrafluoroethene dielectric support body（6）, inner wire right connection part（10）With outer conductor by linkage section（9）Endoporus between install poly- four
Fluorothene dielectric support body（6）, the left end of inner wire left connection part (8) and inner wire right connection part（10）Right-hand member dock respectively
Inner wire linkage section（5）.
2. field sensitive type Spark gap material properties test system according to claim 1 it is characterised in that：Described
Outer conductor supporting section（4）Side wall is provided with radial direction through hole, described plexiglass cylinder（3）It is respectively provided with for installing O in both ends of the surface
The first annular groove of shape sealing ring（13）, described reinforcing annulus（1）Inner face be provided with for O-ring seals are installed
Second ring groove（14）, reinforce annulus (1) and outer conductor supporting section（4）The threaded one end passing end cap connects.
3. field sensitive type Spark gap material properties test system according to claim 2 it is characterised in that：Described
Inner conductor outer diameter is 5.65mm, and outer conductor diameter of bore is 13mm, and broadband continuous conductor coaxial holder end is coaxially connected using N-type
Connect device to be connected with coaxial cable.
4. field sensitive type Spark gap material properties test system according to claim 3 it is characterised in that：Lead outward
At the Support Position of PTFE medium supporter between body and inner wire, the impedance of coaxial line is 50 Ω, in Supporting Media
With an annular groove dug on air interface, form small inductor to compensate discontinuity capacitance, the depth and width of annular groove
It is respectively 0.46mm and 3.42mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611112271.1A CN106443287B (en) | 2016-12-07 | 2016-12-07 | Coaxial device for testing performance of field-sensitive electromagnetic pulse protective material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611112271.1A CN106443287B (en) | 2016-12-07 | 2016-12-07 | Coaxial device for testing performance of field-sensitive electromagnetic pulse protective material |
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| Publication Number | Publication Date |
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| CN106443287A true CN106443287A (en) | 2017-02-22 |
| CN106443287B CN106443287B (en) | 2023-06-16 |
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| CN201611112271.1A Active CN106443287B (en) | 2016-12-07 | 2016-12-07 | Coaxial device for testing performance of field-sensitive electromagnetic pulse protective material |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108562767A (en) * | 2018-04-09 | 2018-09-21 | 西北核技术研究所 | A kind of coaxial type Conduction Interference protective device performance test fixture |
| CN109884485A (en) * | 2019-03-25 | 2019-06-14 | 国网山东省电力公司枣庄供电公司 | 10kV middle-placed switch cabinet partial discharge test job executes clamper, system and method |
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| CN103926426A (en) * | 2013-01-14 | 2014-07-16 | 中国人民解放军军械工程学院 | Broadband continuous-conductor coaxial fixture for material shielding effectiveness testing |
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| CN108562767B (en) * | 2018-04-09 | 2023-09-01 | 西北核技术研究所 | Coaxial type conduction interference protection device performance test fixture |
| CN109884485A (en) * | 2019-03-25 | 2019-06-14 | 国网山东省电力公司枣庄供电公司 | 10kV middle-placed switch cabinet partial discharge test job executes clamper, system and method |
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| Publication number | Publication date |
|---|---|
| CN106443287B (en) | 2023-06-16 |
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