CN201311434Y - Electromagnetic reverberation room - Google Patents
Electromagnetic reverberation room Download PDFInfo
- Publication number
- CN201311434Y CN201311434Y CNU2008202281565U CN200820228156U CN201311434Y CN 201311434 Y CN201311434 Y CN 201311434Y CN U2008202281565 U CNU2008202281565 U CN U2008202281565U CN 200820228156 U CN200820228156 U CN 200820228156U CN 201311434 Y CN201311434 Y CN 201311434Y
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- stirrer
- main shaft
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Abstract
The utility model discloses an electromagnetic reverberation room, wherein the casing of the electromagnetic reverberation room uses a metal framework composed of main section steel as a main body, and is lined with a metal plate with high conductivity inside to form a rectangular closed body, and the three side lengths of the rectangular closed body should be mutual in prime number with the most approaching integer length unit of the wavelength with maximum operation frequency. A shielding door, a ventilation waveguide window and a signal exchange board are installed on the casing, a shaft hole for installing a multi-shaft agitator shaft is opened on the wall of the casing, the agitating head of the agitator is installed on the inner side of the casing, and a driving device is installed on the outer side of the casing. The electromagnetic reverberation room can provide the electromagnetic testing environment with even space and isotropy.
Description
Technical field
The utility model relates to electromagnetic compatibility experiment and field tests, specifically a kind of electromagnetism reverberation chamber.
Background technology
The electromagnetism reverberation chamber is to be equipped with mechanical magnetic stirrer in the shield shell of high Q value, when domestic aerial produces the radio-frequency electromagnetic signal, electromagnetic wave is come back reflective by reverberation chamber sidewall and magnetic stirrer, and the amplitude of indoor optional position energy density, phase place, polarization all change by a certain fixing statistical distribution rule.Weigh the important indicator of electromagnetism reverberation chamber, will reach a big as far as possible even place exactly, the field intensity vector of few more good more, each position of energy loss and approaching more good more.The design of electromagnetism reverberation chamber one-piece construction and stirrer can directly have influence on its every performance index.
The utility model content
But the purpose of this utility model just provides the electromagnetism reverberation chamber of even, the isotropic electromagnetic field test environment in a kind of implementation space.
The utility model is achieved in that this electromagnetism reverberation chamber housing is that the metallic framework that constitutes with main body shaped steel is as main body, the sheet metal of liner high conductivity forms the rectangular closed body, and the integer length unit that three length of sides of this rectangular closed body should be closed on the wavelength of maximum operation frequency most is prime number each other; Shield door, ventilation waveguide window and Signals Transfer Board are installed on housing, have the axis hole that the multiaxis rotating shaft of stirrer is installed on housing wall, the stirring-head of stirrer is installed on the housing inboard, and drive unit is installed on hull outside.
The advantage of this electromagnetism reverberation chamber is that housing adopts double-decker, has both had good shield effectiveness, has high reflecting properties index again.The integer length unit that three length of sides are closed on the wavelength of maximum operation frequency most is prime number each other, can form resonant mode as much as possible.
Under technique scheme, the utility model can also be realized like this:
Stirrer adopts the folding paper structure, its length is greater than 1/4 of the lowest useful frequency wavelength, every stirrer is provided with four groups of foldings, folding by screw retention on clamp, clamp is fixed on the sliding sleeve by being threaded again, relative angle between clamp and the sliding sleeve can be by the adjusting that is threaded, and then satisfies the requirement that the folding knuckle is adjusted; A plurality of sliding sleeves are housed on the stirrer main shaft, and sliding sleeve is fixed on the main shaft by holding screw, and can axially adjust the location to obtain different folding length overall L1 along main shaft.Adopt this structure, can adjust the knuckle and the length overall of stirrer folding easily by this structure, and then change its eigenwert, produce resonant mode as much as possible, thereby provide the space even, isotropic electromagnetic field test environment.
Description of drawings
Below in conjunction with accompanying drawing the utility model is described further.
Fig. 1 is a structural representation of the present utility model.
Fig. 2 wears shaft device mounting structure synoptic diagram.
Fig. 3 is a stirrer hinge structure synoptic diagram.
Fig. 4 is a stirring-head mounting structure synoptic diagram.
Embodiment
As shown in Figure 1, reverberation chamber housing 1 is that the metallic framework that constitutes with main body shaped steel 9 is as main body, the sheet metal 16 of liner high conductivity forms the rectangular closed body, and the integer length unit that three length of sides of this rectangular closed body should be closed on the wavelength of maximum operation frequency most is prime number each other; Shield door 2, ventilation waveguide window 3 and Signals Transfer Board 5 are installed on housing, have the axis hole that 4 rotating shafts of multiaxis stirrer are installed on housing wall, the stirring-head of stirrer is installed on the housing inboard, and drive unit is installed on hull outside.
The material of electromagnetism reverberation chamber housing 1 should have good shield effectiveness, and inside surface has high reflecting properties index, and housing can foregoing double-decker, also can adopt single layer structure.For single layer structure, case material is selected copper coin, the aluminium sheet that has high reflectance and shielding properties concurrently for use; For double-decker, internal layer is selected copper coin, the aluminium sheet of high reflectance for use, and skin is selected the galvanized steel plain sheet with good shielding properties for use.
The physical dimension of electromagnetism reverberation chamber has strict requirement, the chamber body is a rectangle, the integer length unit that three length of sides of this rectangle should be closed on the wavelength of maximum operation frequency most is prime number each other, as the 1000MHz wavelength is 30 centimetres, it then is unit with the decimetre, the 10000MHz wavelength is 30 millimeters, then centimetre to be unit, by that analogy.The ratio of its long L, wide W, high H and minimum dimension will guarantee that all its modulus N value is greater than 60; Its bulk is greater than 8～10 times of operation wavelength at least in one direction in addition, and the frequency of lowest resonance point also will be lower than 1/3rd of frequency of operation, so that form resonant mode as much as possible.
As shown in Figure 2, the axis hole internal fixation of leaving on main body shaped steel 9 has the flange 7 that drive unit output shaft 6 is installed, drive unit 6 places hull outside, the output shaft 6 of drive unit is connected 11 transferring power with the main shaft 12 of stirrer 4 by key, and the main shaft 12 of stirrer 4 is fixed on the flange 7 by alignment bearing 8; Positioning seat 10 plays the effect to stirrer 4 main shafts location.Positioning seat 10 is fixed on the flange 7 by being threaded, and is provided with backing-up screw 14, is provided with electromagnetic sealing piece 13 between positioning seat 10 and stirrer 4 main shafts, and positioning seat 10 is lined with electromagnetic sealing pad 15 with shielding steel plate 16 folders.Can guarantee the stable transfer of power and the bulk shielding usefulness of reverberation chamber by this structure.
As shown in Figure 3, stirrer 4 adopts the folding paper structures, and 17 is that folding its length overall L1 and the knuckle thereof of stirrer 4 is all adjustable, with the resonant mode of increase stirrer as much as possible, provides the test of meeting consumers' demand frequency; Stirrer list folding folding length L 2 must be greater than 1/4 operation wavelength, and the characteristic length of different stirrer foldings is relatively prime, to obtain more feature frequency.
As shown in Figure 4, every stirrer 4 is provided with four groups of foldings 17, and folding is fixed on the clamp 22 by screw 21, and clamp 22 is fixed on the sliding sleeve 19 again by being threaded then, relative angle between clamp 22 and the sliding sleeve 19 is adjustable, and then satisfies the requirement that the folding knuckle is adjusted; Be provided with sliding sleeve 19 in each folding 17 side direction and main shaft 20 axis node places, sliding sleeve 19 is fixed on the stirrer main shaft 20 by holding screw 18, and can axially adjust the location to obtain different folding length overall L1 along main shaft 20.
As shown in Figure 3, Figure 4, the length overall L1 and the knuckle thereof of the folding 17 of stirrer 4 are all adjustable, thus the resonant mode of increase stirrer as much as possible, so that the test of meeting consumers' demand frequency to be provided.Stirrer list folding folding length L 2 must be greater than 1/4 operation wavelength, and the characteristic length of different stirrer foldings is relatively prime, to obtain more feature frequency.Can adjust the knuckle and the length overall of stirrer folding easily by this structure, and then change its eigenwert, produce resonant mode as much as possible, thereby provide the space even, isotropic electromagnetic field test environment.
Claims (3)
1, a kind of electromagnetism reverberation chamber, it is characterized in that this reverberation chamber housing (1) is that the metallic framework that constitutes with main body shaped steel (9) is as main body, the sheet metal of liner high conductivity (16) forms the rectangular closed body, and the integer length unit that three length of sides of this rectangular closed body should be closed on the wavelength of maximum operation frequency most is prime number each other; Shield door (2), ventilation waveguide window (3) and Signals Transfer Board (5) are installed on housing, have the axis hole that multiaxis stirrer (4) rotating shaft is installed on housing wall, the stirring-head of stirrer is installed on the housing inboard, and drive unit is installed on hull outside.
2, electromagnetism reverberation chamber according to claim 1, it is characterized in that stirrer adopts the folding paper structure, its length is greater than 1/4 of the lowest useful frequency wavelength, every stirrer is provided with four groups of foldings (17), folding is fixed on the clamp (22) by screw (21), clamp is fixed in by being threaded on the sliding sleeve (19) again, and the relative angle between clamp and the sliding sleeve can be by the adjusting that is threaded, and then satisfies the requirement that the folding knuckle is adjusted; A plurality of sliding sleeves are housed on the stirrer main shaft, and sliding sleeve is fixed on the main shaft by holding screw (18), and can axially adjust the location to obtain different folding length overall L1 along main shaft.
3, electromagnetism reverberation chamber according to claim 1 and 2, it is characterized in that the axis hole internal fixation of leaving has the flange (7) that drive unit output shaft (6) is installed on main body shaped steel (9), the output shaft of drive unit is connected (11) transferring power with the main shaft of stirrer (12) by key, and the main shaft of stirrer is fixed on the flange (7) by alignment bearing (8) and positioning seat (10); Positioning seat (10) is fixed in by being threaded on the flange (7), and is provided with backing-up screw (14), is provided with electromagnetic sealing piece (13) and electromagnetic sealing pad (15) between positioning seat and stirrer main shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202281565U CN201311434Y (en) | 2008-12-15 | 2008-12-15 | Electromagnetic reverberation room |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202281565U CN201311434Y (en) | 2008-12-15 | 2008-12-15 | Electromagnetic reverberation room |
Publications (1)
| Publication Number | Publication Date |
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| CN201311434Y true CN201311434Y (en) | 2009-09-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2008202281565U Expired - Lifetime CN201311434Y (en) | 2008-12-15 | 2008-12-15 | Electromagnetic reverberation room |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012097732A1 (en) * | 2011-01-18 | 2012-07-26 | The University Of Hongkong | Compact electronic reverberation chamber |
| CN103185841A (en) * | 2011-12-27 | 2013-07-03 | 鸿富锦精密工业（深圳）有限公司 | Homogeneous domain testing device and testing method |
| CN103439536A (en) * | 2013-08-29 | 2013-12-11 | 陕西海泰电子有限责任公司 | Stirring device for electromagnetic shielding shell shielding effectiveness test |
| CN103558422A (en) * | 2013-10-31 | 2014-02-05 | 陕西海泰电子有限责任公司 | Mixing stirring device of mechanical stirring and source stirring of electromagnetic reverberation chamber and method |
| CN103743959A (en) * | 2014-01-24 | 2014-04-23 | 中国人民解放军军械工程学院 | Method for testing shielding effectiveness of irregular structure cavity in reverberation chamber based on frequency stirring technology |
| CN105115585A (en) * | 2015-07-23 | 2015-12-02 | 南京大学 | Measuring method for reverberation time of reverberation room |
| CN107864602A (en) * | 2017-10-11 | 2018-03-30 | 北京无线电计量测试研究所 | A kind of reverberation chamber wall-through motor and screen method |
| CN107860988A (en) * | 2017-10-10 | 2018-03-30 | 北京无线电计量测试研究所 | A kind of electromagnetic wave reverberation chamber |
| CN108132390A (en) * | 2017-12-21 | 2018-06-08 | 中国舰船研究设计中心 | The method and system of field strength and analog composite field electromagnetic environment in a kind of promotion reverberation chamber |
| CN109581096A (en) * | 2018-10-18 | 2019-04-05 | 上海无线电设备研究所 | Metal shield materials shield effectiveness analysis model and its measurement method under screened room |
| CN111707875A (en) * | 2020-05-08 | 2020-09-25 | 中石化石油工程技术服务有限公司 | Electric control pry shielding effectiveness testing device and method for gas gathering station field |
| CN111880015A (en) * | 2020-08-04 | 2020-11-03 | 南京捷希科技有限公司 | Reverberation device |
| CN113483570A (en) * | 2021-05-25 | 2021-10-08 | 中国工程物理研究院应用电子学研究所 | Vacuum microwave smelting device |
| CN114034950A (en) * | 2021-10-29 | 2022-02-11 | 西安空间无线电技术研究所 | System and method for testing electromagnetic leakage degree of aerospace passive product based on reverberation chamber |
| WO2022033770A1 (en) * | 2020-08-14 | 2022-02-17 | Bluetest Ab | A high-frequency mode stirrer for reverberation chambers |
| CN115902720A (en) * | 2022-11-01 | 2023-04-04 | 北京电磁测通科技有限公司 | Spiral reflection type reverberation chamber |
-
2008
- 2008-12-15 CN CNU2008202281565U patent/CN201311434Y/en not_active Expired - Lifetime
Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103502824B (en) * | 2011-01-18 | 2016-06-15 | 香港大学 | Compact electronic reverberation chamber |
| CN103502824A (en) * | 2011-01-18 | 2014-01-08 | 香港大学 | Compact electronic reverberation chamber |
| WO2012097732A1 (en) * | 2011-01-18 | 2012-07-26 | The University Of Hongkong | Compact electronic reverberation chamber |
| EP2666025A4 (en) * | 2011-01-18 | 2017-02-01 | The University of Hong Kong | Compact electronic reverberation chamber |
| CN103185841A (en) * | 2011-12-27 | 2013-07-03 | 鸿富锦精密工业（深圳）有限公司 | Homogeneous domain testing device and testing method |
| CN103439536A (en) * | 2013-08-29 | 2013-12-11 | 陕西海泰电子有限责任公司 | Stirring device for electromagnetic shielding shell shielding effectiveness test |
| CN103439536B (en) * | 2013-08-29 | 2016-12-28 | 陕西海泰电子有限责任公司 | A kind of agitating device for the test of electromagnetic shielding shell shield effectiveness |
| CN103558422A (en) * | 2013-10-31 | 2014-02-05 | 陕西海泰电子有限责任公司 | Mixing stirring device of mechanical stirring and source stirring of electromagnetic reverberation chamber and method |
| CN103743959A (en) * | 2014-01-24 | 2014-04-23 | 中国人民解放军军械工程学院 | Method for testing shielding effectiveness of irregular structure cavity in reverberation chamber based on frequency stirring technology |
| CN103743959B (en) * | 2014-01-24 | 2015-12-30 | 中国人民解放军军械工程学院 | A kind of method based on irregular structure cavity shield effectiveness in the test reverberation chamber of frequency stirring technique |
| CN105115585A (en) * | 2015-07-23 | 2015-12-02 | 南京大学 | Measuring method for reverberation time of reverberation room |
| CN107860988A (en) * | 2017-10-10 | 2018-03-30 | 北京无线电计量测试研究所 | A kind of electromagnetic wave reverberation chamber |
| CN107864602A (en) * | 2017-10-11 | 2018-03-30 | 北京无线电计量测试研究所 | A kind of reverberation chamber wall-through motor and screen method |
| CN108132390A (en) * | 2017-12-21 | 2018-06-08 | 中国舰船研究设计中心 | The method and system of field strength and analog composite field electromagnetic environment in a kind of promotion reverberation chamber |
| CN109581096A (en) * | 2018-10-18 | 2019-04-05 | 上海无线电设备研究所 | Metal shield materials shield effectiveness analysis model and its measurement method under screened room |
| CN111707875A (en) * | 2020-05-08 | 2020-09-25 | 中石化石油工程技术服务有限公司 | Electric control pry shielding effectiveness testing device and method for gas gathering station field |
| CN111880015A (en) * | 2020-08-04 | 2020-11-03 | 南京捷希科技有限公司 | Reverberation device |
| WO2022033770A1 (en) * | 2020-08-14 | 2022-02-17 | Bluetest Ab | A high-frequency mode stirrer for reverberation chambers |
| CN113483570A (en) * | 2021-05-25 | 2021-10-08 | 中国工程物理研究院应用电子学研究所 | Vacuum microwave smelting device |
| CN114034950A (en) * | 2021-10-29 | 2022-02-11 | 西安空间无线电技术研究所 | System and method for testing electromagnetic leakage degree of aerospace passive product based on reverberation chamber |
| CN114034950B (en) * | 2021-10-29 | 2024-05-14 | 西安空间无线电技术研究所 | System and method for testing electromagnetic leakage degree of spaceflight passive product based on reverberation room |
| CN115902720A (en) * | 2022-11-01 | 2023-04-04 | 北京电磁测通科技有限公司 | Spiral reflection type reverberation chamber |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: NORTHERN ENGINEERING DESIGN INSTITUTE Free format text: FORMER NAME: BEIFANG DESIGN INST.;BEIFANG DESIGN INST. Owner name: NORTHERN ENGINEERING DESIGN INSTITUTE CO., LTD. Free format text: FORMER NAME: NORTHERN ENGINEERING DESIGN INSTITUTE |
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| CP01 | Change in the name or title of a patent holder |
Address after: 050000 No. 55 East Yuhua Road, Hebei, Shijiazhuang Patentee after: North engineering design and Research Institute Address before: 050000 No. 55 East Yuhua Road, Hebei, Shijiazhuang Patentee before: NORINDAR INTERNAT Address after: 050000 No. 55 East Yuhua Road, Hebei, Shijiazhuang Patentee after: NORENDAR International Ltd. Address before: 050000 No. 55 East Yuhua Road, Hebei, Shijiazhuang Patentee before: North engineering design and Research Institute |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090916 |