CN103439536B - A kind of agitating device for the test of electromagnetic shielding shell shield effectiveness - Google Patents
A kind of agitating device for the test of electromagnetic shielding shell shield effectiveness Download PDFInfo
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- CN103439536B CN103439536B CN201310386324.9A CN201310386324A CN103439536B CN 103439536 B CN103439536 B CN 103439536B CN 201310386324 A CN201310386324 A CN 201310386324A CN 103439536 B CN103439536 B CN 103439536B
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Abstract
The present invention provides a kind of agitating device for the test of electromagnetic shielding shell shield effectiveness, it include outside framework, be arranged in outside framework drive assembly and being arranged on to drive above assembly and with the rotary components driving assembly to be connected；Rotary components includes rotary shaft and arranges flabellum on the rotary shaft；Flabellum is at least provided with one.The present invention design by outside framework, drastically increase adaptability and the motility of test of the limited electromagnetic shielding shell of internal volume, also improving the safety of test, device uses in being totally placed in tested housing so that lays with conveniently moving thus improves testing efficiency；By using all-metal material, efficiently avoid introducing nonmetallic materials absorption of electromagnetic energy and shield effectiveness test is impacted.
Description
Technical field
The invention belongs to emc testing technical field, relate to a kind of for electromagnetic shielding shell screen
Cover the agitating device of effect test.
Background technology
The shield effectiveness method of testing of the electromagnetic shielding shell such as domestic existing screened room, case and cabinet,
Mainly for screened room cavity or empty case and cabinet, take to carry out with a secondary reception antenna at housing inside/outside
Repeatedly test, and then find the method receiving signal maximum；The measurement of this shield effectiveness is for prediction
Inner space limited electromagnetic shielding shell (enclosure interior is equipped with electric/electronic devices etc.) final performance
Meaning is limited；Reception antenna changes position, polarization mode in multiple times also makes testing efficiency be substantially reduced,
And internal volume limited electromagnetic shielding shell is difficult to often；
The annex H of foreign standard IEC61000-4-21 describes for electromagnetic shielding shell shield effectiveness
The nested Reverberation room method of test: under reverberation chamber test environment, installs stirring dress in tested enclosure interior
Put and reception antenna, utilize agitating device continuously/discrete rotation makes enclosure interior electromagnetic field meet statistics
Uniformity, so reception antenna without changing position, polarization mode can obtain receive signal maximum
Value；The method is that the shield effectiveness test of the limited electromagnetic shielding shell in inner space provides reference, has
High-strength for airborne vehicle of a little foreign standard such as Britain's military standard DEF STAN59-411Part4(
Radiation field test method) in i.e. have similar method to describe, but related data to used by this test stir
The specific design of device lacks description；Therefore, be badly in need of a kind of practicality of design is particularly suited for internal sky
Between limited electromagnetic shielding shell shield effectiveness test agitating device so that it is have the highest in engineering
Using value.
Summary of the invention
In order to solve the technical problem in the presence of above-mentioned background, the present invention provides a kind of for electromagnetic screen
Cover the agitating device of casing shielding effect test.
The technical solution of the present invention is:
The present invention provides a kind of agitating device for the test of electromagnetic shielding shell shield effectiveness, and it is special
Part is: the driving assembly that include outside framework, is arranged in outside framework and be arranged on driving assembly
Top the rotary components being connected with driving assembly；
Described rotary components includes rotary shaft and arranges flabellum on the rotary shaft；Described flabellum is at least
Arrange one；
Above-mentioned driving assembly includes motor, be arranged on motor and the bearing that is connected with motor and one end
It is fixedly connected on bearing and adapter that the other end is connected with rotary shaft；
The above-mentioned motor bearings also including being arranged between adapter upper head plate and motor bottom plate is fixed
Set；Described motor, bearing and adapter are arranged in motor bearings fixed cover from bottom to top；
Above-mentioned flabellum is folder corner structure, rectangular configuration, Z-type structure；Described flabellum is that thickness is
The aluminium sheet of 1mm or copper coin；
The size of above-mentioned outside framework and the size of flabellum are collocated with each other and leave gap；
The present invention provides the another kind of agitating device for the test of electromagnetic shielding shell shield effectiveness, and it is special
Different part is: includes base box, be arranged on the outside framework above base box, be arranged in base box
Drive assembly and be arranged on above base box and with the rotary components driving assembly to be connected；
Described rotary components includes rotary shaft and arranges flabellum on the rotary shaft；Described flabellum is at least
Arrange one；
Above-mentioned driving assembly includes motor, be arranged on motor and the bearing that is connected with motor and one end
It is fixedly connected on bearing and the other end stretches out the adapter that base box is connected with rotary shaft；
The above-mentioned motor bearings also including being arranged between adapter upper head plate and motor bottom plate is fixed
Set；Described motor, bearing and adapter are arranged in motor bearings fixed cover from bottom to top；
Above-mentioned flabellum is folder corner structure, rectangular configuration, Z-type structure；Described flabellum is that thickness is
The aluminium sheet of 1mm or copper coin；
The size of above-mentioned outside framework and the size of flabellum are collocated with each other and leave gap.
Advantages of the present invention:
1, the present invention design by outside framework, drastically increases the limited electromagnetic shielding of internal volume
The adaptability of housing and the motility of test, also improve the safety of test；
2, use in the present invention is totally placed in tested housing, and cancel the control part of motor, keep away
Exempt from because installing, control and tested housing being damaged and even to affect tested housing performance by perforate etc.,
And lay with conveniently moving thus improve testing efficiency；
3, the present invention uses all-metal material, efficiently avoid introducing nonmetallic materials and absorbs electromagnetic energy
Measure and shield effectiveness test is impacted.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of the present invention；
Fig. 2 is another kind (containing base box) the overall structure schematic diagram of the present invention；
Fig. 3 is the driving assembly of the present invention, rotary components structural representation；
Fig. 4 is the blade structure schematic diagram of the present invention；
Wherein: 1-outside framework, 2-rotary shaft, 3-flabellum, 4-drives assembly, 5-base box, and 6-is even
Meet device, 7-adapter upper head plate, 8-bearing, 9-motor bearings fixed cover, 10-motor bottom plate, 11-
Motor.
Detailed description of the invention
The present invention provide a kind of for electromagnetic shielding shell shield effectiveness test agitating device, including outside
Framework 1, the driving assembly 4 being arranged in outside framework 1 and be arranged on driving assembly 4 above and with drive
The rotary components that dynamic assembly 4 connects；
Rotary components includes rotary shaft 2 and the flabellum 3 being arranged in rotary shaft 2；Flabellum 3 at least sets
Put one；
Drive the bearing 8 that assembly 4 includes motor 11, is arranged on motor 11 and is connected with motor 11
And the adapter 6 that one end is fixedly connected on bearing 8 and the other end is connected with rotary shaft 2；
Also include the motor bearings fixed cover being arranged between adapter upper head plate 7 and motor bottom plate 10
9；Motor 11, bearing 8 and adapter 6 are arranged in motor bearings fixed cover 9 from bottom to top；
Flabellum 3 is folder corner structure, rectangular configuration, Z-type structure；Flabellum 3 is 1mm's for thickness
Aluminium sheet or copper coin；
The size of outside framework 1 is collocated with each other with the size of flabellum 3 and leaves gap；
The present invention provides the another kind of agitating device for the test of electromagnetic shielding shell shield effectiveness, including
Base box 5, the driving assembly being arranged on the outside framework 1 above base box 5, being arranged in base box 5
4 and be arranged on above base box 5 and with the rotary components driving assembly 4 to be connected；
Rotary components includes rotary shaft 2 and the flabellum 3 being arranged in rotary shaft 2；Flabellum 3 at least sets
Put one；
Drive the bearing 8 that assembly 4 includes motor 11, is arranged on motor 11 and is connected with motor 11
And one end is fixedly connected on bearing 8 and the other end stretches out the company that base box 5 is connected with rotary shaft 2
Connect device 6；
Also include the motor bearings fixed cover being arranged between adapter upper head plate 7 and motor bottom plate 10
9；Described motor 11, bearing 8 and adapter 6 are arranged in motor bearings fixed cover 9 from bottom to top；
Flabellum 3 is folder corner structure, rectangular configuration, Z-type structure；Flabellum 3 is 1mm's for thickness
Aluminium sheet or copper coin；
The size of outside framework 1 is collocated with each other with the size of flabellum 3 and leaves gap.
1, structural principle and impact
The invention provides a kind of agitating device for the test of electromagnetic shielding shell shield effectiveness, including
Outside framework 1, rotary components, driving assembly 4 and base box 5；Rotary components is in outside framework 1；
In driving assembly 4 to be in outside framework 1 in addition to power supply or in base box 5；Rotary components passes through adapter 6
4 connect mutually with driving assembly；
By the design of outside framework 1, meet well in the limited electromagnetic shielding shell in inner space
Tilt the Special use requirements such as even inversion, there is the strongest adaptability and motility, improve simultaneously
The safety of test；By outside framework 1 and the design of base box 5, agitating device is totally placed in
Use in tested housing, and use continuous stirring (rotation) mode to eliminate the control part of motor 11,
Avoid because installing, control and tested housing being damaged and even to affect tested housing performance by perforate etc.,
Have the advantages that testing efficiency is high because laying with conveniently moving simultaneously；By using all-metal material,
Can be effectively prevented from introducing nonmetallic materials absorption of electromagnetic energy shield effectiveness test is impacted；
By flabellum 3 form, the ingehious design of structure, it is thus achieved that higher stirring efficiency, Ke Yiman
Foot length × width × height is not more than more than electromagnetic shielding shell 800MHz of 1000mm × 1000mm × 300mm
(along with the reduction of tested shell dimension, lowest usable frequency will increase the shield effectiveness test request of frequency
High).
Agitating device used by the test of the generally agitating device used by reverberation chamber, or ghost shield effectiveness,
It is not limited by enclosure interior space and the situations such as agitating device slant setting occur, also will not be because of in housing
There is the situation adjusting agitating device state for the purpose of improving integrated testability performance in portion's circumstance complication,
The design of outside framework 1 of the present invention meets the spy in the limited electromagnetic shielding shell in inner space well
Very use requirement, flabellum 3 self and tested enclosure interior device about shielded simultaneously,
The damage that avoiding contacts with each other is likely to result in.
The present invention is similar to fan structure relatively regular flabellum 3 form and avoids irregular flabellum 3 greatly
Waste to stirring (rotation) space, stirs (rotation) in making limited stirring (rotation) space
The area of blade is bigger；And it is highly susceptible to processing；The present invention is also by flabellum 3 blade quantity, blade
The ingehious design of bending angle (different), blade layout type etc., it is thus achieved that higher stirring effect
Rate, it is ensured that effectively redistribute the electromagnetic energy in shield shell.
The present invention drives assembly to use external portable power source to power, easy to use, can stream time
Long；Toothed gearing electric motor volume used is little, and continuous stirring (rotation) mode eliminates motor 11
Control part, make the overall volume of the present invention effectively reduce.
2, mentality of designing
A) master-plan
Master-plan of the present invention as Figure 1-Figure 2, drives assembly to be in addition to power supply in outside framework 1
Or being in base box 5, rotary components is in outside framework, if being provided with base box, then housing
Frame is fixed in base box 5；From generally agitating device is fixedly mounted on reverberation chamber in use different,
Tested housing is even affected for avoiding perforate etc. because of installation that tested electromagnetic shielding shell is damaged
Can, shield effectiveness test agitating device is preferably placed in housing, and flabellum 3 must be kept to rotate simultaneously
During balance and stability, for the electromagnetic shielding shell that inner space is limited, agitating device is especially
Adapt to the actually used situations such as the inclination even inversion that is likely to occur, and ensure himself and tested
On the safety of enclosure interior device, designed outside framework 1 and base box 5 structure can meet well
State use requirement.
Owing to using in the electromagnetic shielding shell body limited in inner space, the design of agitating device is with small-sized
Turning to target, under the size condition limited, the main ingehious design by flabellum 3 promotes as much as possible
Its tested shell dimension being suitable for, reduce its available minimum test frequency；
Device full-size designed by the present invention is in 240mm(length) × 240mm(width) × 215mm
(high), it is adaptable to length × width × height is not more than 1000mm × 1000mm × 300mm and inside can accommodate
The shield effectiveness of the electromagnetic shielding shell 800MHz frequencies above of this device is tested (along with tested housing chi
Very little reduction, lowest usable frequency will increase).
The present invention uses all-metal material, it is to avoid introduce nonmetallic materials absorption of electromagnetic energy to shielding effect
Can test impact.
B) flabellum design
Seeing Fig. 4, the version of flabellum 3 is designed like the structure in fan, relatively other structure
Form has the advantages such as high, the easy processing of space availability ratio；Flabellum is designed as asymmetrical fan structure,
By four groups width is identical, the most identical but folding that angle is different forms, folding width be 100mm,
Highly being 120mm, folding angle is followed successively by 150 °, 120 °, 135 °, 105 °；Flabellum 3
The metallic material of aluminum high by conductivity or copper become, and thickness is 1mm.
The biggest tactical diameter and stirring (rotation) blade area, different blade and closely
In optimal folding angle design is all beneficial to housing, electromagnetic wave with more complicated form reflection and dissipates
Penetrate, thus obtain higher stirring efficiency, it is ensured that effectively redistribute the electromagnetic energy in shield shell
Amount.
C) assembly design is driven
See Fig. 3, drive assembly by power supply, motor 11, bearing 8, motor bearings fixed cover 9, connect
Connect composition such as device 6 grade, in addition to power supply, be placed in outside framework 1 or base box 5；
The rotary speed of this agitating device flabellum 3 is relatively slow, uses portable power source (rated voltage 5V) to supply
The low-power toothed gearing electric motor of electricity drives flabellum 3 to rotate, and meets the continuous rotation that 2s-5s mono-circle is fixing
Rotary speed, and can work continuously more than 8 hours.
This agitating device uses " mould stirring " mode to rotate continuously, does not uses " mould tuning " mode to walk
Enter motion, thus eliminate the control part of motor 11, it is to avoid perforate etc. are to tested shell because of control
Body damages even affects tested housing performance.
Claims (6)
1. the agitating device for the test of electromagnetic shielding shell shield effectiveness, it is characterised in that: bag
The driving assembly that include outside framework, is arranged in outside framework and be arranged on above driving assembly and with driving
The rotary components that assembly connects；Described rotary components is arranged in outside framework；Described driving assembly includes
Motor, it is arranged on motor and the bearing that is connected with motor and one end is fixedly connected on bearing and another
The adapter that one end is connected with rotary shaft；
Also include the motor bearings fixed cover being arranged between adapter upper head plate and motor bottom plate；Institute
State motor, bearing and adapter to be arranged on from bottom to top in motor bearings fixed cover；
Described rotary components includes rotary shaft and arranges flabellum on the rotary shaft；Described flabellum is at least
Arrange one.
Agitating device for the test of electromagnetic shielding shell shield effectiveness the most according to claim 1,
It is characterized in that: described flabellum is folder corner structure, rectangular configuration, Z-type structure；Described flabellum is
Thickness is aluminium sheet or the copper coin of 1mm.
Agitating device for the test of electromagnetic shielding shell shield effectiveness the most according to claim 1,
It is characterized in that: the size of described outside framework and the size of flabellum are collocated with each other and leave gap.
4. the agitating device for the test of electromagnetic shielding shell shield effectiveness, it is characterised in that: bag
Include base box, be arranged on the outside framework above base box, the driving assembly that is arranged in base box and
It is arranged on the rotary components being connected above base box and with driving assembly；Described driving assembly include motor,
The bearing being arranged on motor and be connected with motor and one end are fixedly connected on bearing and the other end is stretched
Go out the adapter that base box is connected with rotary shaft；
Also include the motor bearings fixed cover being arranged between adapter upper head plate and motor bottom plate；Institute
State motor, bearing and adapter to be arranged on from bottom to top in motor bearings fixed cover；
Described rotary components includes rotary shaft and arranges flabellum on the rotary shaft；Described flabellum is at least
Arrange one.
Agitating device for the test of electromagnetic shielding shell shield effectiveness the most according to claim 4,
It is characterized in that: described flabellum is folder corner structure, rectangular configuration, Z-type structure；Described flabellum is thick
Degree is aluminium sheet or the copper coin of 1mm.
Agitating device for the test of electromagnetic shielding shell shield effectiveness the most according to claim 4,
It is characterized in that: the size of described outside framework and the size of flabellum are collocated with each other and leave gap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310386324.9A CN103439536B (en) | 2013-08-29 | 2013-08-29 | A kind of agitating device for the test of electromagnetic shielding shell shield effectiveness |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310386324.9A CN103439536B (en) | 2013-08-29 | 2013-08-29 | A kind of agitating device for the test of electromagnetic shielding shell shield effectiveness |
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| CN103439536A CN103439536A (en) | 2013-12-11 |
| CN103439536B true CN103439536B (en) | 2016-12-28 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109541512B (en) * | 2018-12-20 | 2021-03-23 | 北京无线电计量测试研究所 | Stirrer for reverberation chamber device and reverberation chamber device |
| CN111880015A (en) * | 2020-08-04 | 2020-11-03 | 南京捷希科技有限公司 | Reverberation device |
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