CN207866913U - The shield effectiveness of shielding case body tests emitter - Google Patents

The shield effectiveness of shielding case body tests emitter Download PDF

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Publication number
CN207866913U
CN207866913U CN201721546006.4U CN201721546006U CN207866913U CN 207866913 U CN207866913 U CN 207866913U CN 201721546006 U CN201721546006 U CN 201721546006U CN 207866913 U CN207866913 U CN 207866913U
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China
Prior art keywords
emitter
shield effectiveness
case body
substrate
tests
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Active
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CN201721546006.4U
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Chinese (zh)
Inventor
高同国
滕有责
简继红
陈思思
徐国强
乔旭兴
张滨
唐道奎
张广明
宋春雷
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716th Research Institute of CSIC
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716th Research Institute of CSIC
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Priority to CN201721546006.4U priority Critical patent/CN207866913U/en
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  • Monitoring And Testing Of Transmission In General (AREA)

Abstract

The utility model is related to a kind of shield effectiveness of shielding case body to test emitter, including locking device, shielding box, signal emitting-source printed board, antenna, substrate and CPCI power connectors;Shielding box is made of upper cover and shell, and signal emitting-source printed board is arranged in shielding box, and shielding box is fixed on substrate;Two longer parallel sides of substrate are provided with locking device, for emitter to be fixed on cabinet inside;CPCI power connectors are arranged in a side in two shorter lateral sides of substrate, are disposed vertically with locking device;Antenna includes positive plate, negative plate and support column, and negative plate is vertically set on lid, and support column is for connecting positive plate and negative plate.The utility model uses modularized design, is mountable in the anti-adverse environment ruggedized computer of cpci bus standard, occupies a slot position, and module is powered by reinforcing cabinet, and working frequency range is 30~990MHz.

Description

The shield effectiveness of shielding case body tests emitter
Technical field
The utility model is related to electronic equipment Electromagnetic Compatibity Test Technology, the shield effectiveness of especially a kind of shielding case body is surveyed Try emitter.
Background technology
If wanting to obtain good EMC performances, it is necessary to test two work by EMC designs and EMC.EMC emulation can be right EMC designs play good directive function, but all design means must all be tested by EMC and be verified.
The reliable electromagnetic wave emission source of cabinet inside is installed on due to lacking, the country is general lack of comprehensive, accurate test The means of shielding case efficiency, this brings prodigious ambiguity to the design work of shielding case.Simultaneously as lacking reliable The selection of verification means, we some work for having carried out at present, such as novel shielding material, the EMC verifications of Novel chassis Accurate test data can not be obtained, this formulates respective design guide and bring difficulty to further research is carried out.
The electromagnetic wave emission source that uniquely can be placed at reinforcing cabinet inside domestic at present is the spherical shape of Southeast China University's exploitation Dipole emission device is mainly used for testing the shield effectiveness of wave shield room, but must use internal battery powers, simultaneously It is limited by size and circuit design, the transmission power and dynamic range of spherical dipole emission device all cannot be satisfied reinforcing machine Test request, while can not be reliably fixed in cabinet inside, lead to not the shield effectiveness for accurately testing cabinet.On the other hand, Since spherical dipole and cabinet inside circuit do not have any connection, the cabinet caused by electrical design defect can not be measured Shield effectiveness declines.
Utility model content
The purpose of this utility model is to provide a kind of shield effectiveness of shielding case body to test emitter.
Realize that the technical solution of the utility model aim is:A kind of shield effectiveness test transmitting dress of shielding case body It sets, including locking device, shielding box, signal emitting-source printed board, antenna, substrate and CPCI power connectors;
The shielding box is made of upper cover and shell, and signal emitting-source printed board is arranged in shielding box, and shielding box is fixed On substrate;Two longer parallel sides of the substrate are provided with locking device, for emitter to be fixed on cabinet It is internal;CPCI power connectors are arranged in a side in two shorter lateral sides of substrate, are disposed vertically with locking device;Antenna packet Positive plate, negative plate and support column are included, negative plate is vertically set on lid, and support column is for connecting positive plate and negative plate.
Compared with prior art, remarkable advantage is the utility model:(1) the utility model uses modularized design, machine Case in-line power facilitates installation;Emission source module is designed to standard 3U board structures, antenna is mounted on transmitting source module On, make antenna surface of emission face chassis cover plate, emitter is fixed on cabinet CPCI slots using locking device, realizes In the reliable installation of cabinet inside;It is connected using the power outlet of standard CPCI power connectors and cabinet inside, passes through cabinet Power supply circuit introduces the+12V power inputs that external industry control power supply provides;Built-in MCU module, the frequency point that can control emission source are close The residence time of degree and each frequency point;(2) the wide reachable 30~990MHz of frequency range is covered, frequency point residence time can be arranged 20~ 30mS tests wide dynamic range 60dB, and frequency stability is high, reachable ± 500PPm;(3) module is mounted on machine by convenient test It can be tested according to conventional electromagnetic compatible testing method inside case.
Description of the drawings
Fig. 1 is the graphics that shield effectiveness tests emitter.
Fig. 2 is C8051F020 scm software logic diagrams.
Fig. 3 is that shield effectiveness tests scheme of installation of the emitter in shielding case.
Fig. 4 is shield effectiveness test site arrangement schematic diagram.
Specific implementation mode
In conjunction with Fig. 1, a kind of shield effectiveness test emitter of shielding case body, including locking device 1, shielding box, signal Emission source printed board 6, antenna, substrate 8 and CPCI power connectors 9;
The shielding box is made of upper cover 5 and shell 7, and signal emitting-source printed board 6 is arranged in shielding box, and shielding box is solid Determine on the substrate 8;Two longer parallel sides of the substrate 8 are provided with locking device 1, for emitter to be fixed on Cabinet inside;A side setting CPCI power connector 9, vertical with locking device 1 to put in two shorter lateral sides of substrate 8 It sets;Antenna includes positive plate 4, negative plate 2 and support column 3, and negative plate 2 is vertically set in upper cover 5, and support column 3 is for connecting Positive plate 4 and negative plate 2.
It is integrated with the transmiting signal source of two frequency ranges in signal emitting-source printed board 6, respectively 30~510MHz and 510~ Two frequency ranges of 990MHz.
The support column 3 is vertical with negative plate 2.
The shielding box is metal case.
The signal emitting-source printed board 6 is connect by power cord 10 with CPCI power connectors 9, and coaxial line 11 is passed through It is connect with antenna.
The antenna uses spherical crown abnormity electronically small antenna.
The positive plate 4 uses copper material, and the radius of spherical surface is 91mm, and the distance between positive/negative plate is 53mm, support The length of column is 60mm.Spherical crown vertical view radius is 35mm, and spherical crown height is 7mm, wall thickness 0.8mm.
The utility model is illustrated with reference to embodiment.
Embodiment
It is illustrated with reference to Fig. 1 the feature of shield effectiveness test emitter.The module first passes through the fixation of CPCI power connectors 9 To cabinet inside, then it is locked by locking device 1.A shielding box is fixed on the substrate 8 of the module.Shielding box is by upper Lid 5, shell 7 and signal emitting-source printed board 6 form, and the transmiting signal source of two frequency ranges is integrated in the printed board 6.Signal is sent out It penetrates source printed board 6 to be sealed in inside metal shell, realizes the heat dissipation of circuit board and good Electro Magnetic Compatibility.Emit source signal Power supply is provided by CPCI power connectors 9 through a power cord 10, and the signal for emitting source signal is transmitted to by coaxial line 11 Antenna 4.
Frequency reference source is generally by there is source crystal oscillator realization.Local vibration source and emission source are both by reference frequency and frequency synthesis Device realizes that frequency synthesizer is that the phaselocked loop device of programmable output realizes the output of frequency-doubled signal.Local vibration source and emission source warp Cross the signal that frequency mixer obtains wanting frequency.The signal exports after the filtering of high-frequency signal, level adjustment and power amplification.
It is illustrated in combination with fig. 2 C8051F020 scm software logic diagrams.After microcontroller initializes, local vibration source is set The register value of frequency synthesizer makes local vibration source output signal frequency in specific frequency point;Then setting RF source frequencies close The register value grown up to be a useful person, makes radio frequency source occur different frequency points successively, and the two obtains required whole after frequency mixer Frequency point.It is specifically shown in Tables 1 and 2.
Table 1 30~510MHz frequency ranges local vibration source and RF source frequencies correspond to table
Table 2 510~990MHz frequency ranges local vibration source and RF source frequencies correspond to table
Antenna includes positive plate, negative plate and support column three parts composition.Spherical crown antenna positive plate uses copper material, spherical surface Radius be 91mm, the length of support column is 60mm, and for three parts after installation is complete, the distance between positive/negative plate is 53mm.Branch Dagger is processed using insulating materials.Negative plate uses the aluminium sheet Bending Processing of 2mm thickness, carries out electric conductive oxidation processing.
Illustrate that shield effectiveness tests the fixed setting method of emitter in conjunction with Fig. 3.Shield effectiveness is tested into emitter 15 are installed on inside shielding case 14.The bottom of emitter is fixed on shielding case bottom plate 13, and both sides are locked with locking device It fastens.
Illustrate the method that shielding case shield effectiveness is tested in conjunction with Fig. 4.Shield effectiveness will be installed inside shielding case 14 It after testing emitter, is positioned on 19 on standard testing platform, 17 receiving screen of reception antenna is used according to standard testing flow Cover electromagnetic energy of the cabinet to external radiation.Test signal is transported to follow-up signal processing unit by feeder 20.

Claims (7)

1. a kind of shield effectiveness of shielding case body tests emitter, which is characterized in that including locking device (1), shielding box, letter Number emission source printed board (6), antenna, substrate (8) and CPCI power connectors (9);
The shielding box is made of upper cover (5) and shell (7), and signal emitting-source printed board (6) is arranged in shielding box, shielding box It is fixed on substrate (8);Two longer parallel sides of the substrate (8) are provided with locking device (1), for that will emit dress It sets and is fixed on cabinet inside;A side setting CPCI power connector (9) in two shorter lateral sides of substrate (8), with locking Device (1) is disposed vertically;Antenna includes positive plate (4), negative plate (2) and support column (3), and negative plate (2) is vertically set on It covers on (5), support column (3) is for connecting positive plate (4) and negative plate (2).
2. the shield effectiveness of shielding case body according to claim 1 tests emitter, which is characterized in that signal emitting-source The transmiting signal source of two frequency ranges, two frequency ranges of respectively 30~510MHz and 510~990MHz are integrated in printed board (6).
3. the shield effectiveness of shielding case body according to claim 1 tests emitter, which is characterized in that the support column (3) vertical with negative plate (2).
4. the shield effectiveness of shielding case body according to claim 1 tests emitter, which is characterized in that the shielding box For metal case.
5. the shield effectiveness of shielding case body according to claim 1 tests emitter, which is characterized in that the signal hair It penetrates source printed board (6) to connect with CPCI power connectors (9) by power cord (10), be connect with antenna by coaxial line (11).
6. the shield effectiveness of shielding case body according to claim 1 tests emitter, which is characterized in that the antenna is adopted With spherical crown abnormity electronically small antenna.
7. the shield effectiveness of shielding case body according to claim 1 or 6 tests emitter, which is characterized in that it is described just Pole plate (4) uses copper material, and the radius of spherical surface is 91mm, and the distance between positive/negative plate is 53mm, and the length of support column is 60mm。
CN201721546006.4U 2017-11-19 2017-11-19 The shield effectiveness of shielding case body tests emitter Active CN207866913U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201721546006.4U CN207866913U (en) 2017-11-19 2017-11-19 The shield effectiveness of shielding case body tests emitter

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Application Number Priority Date Filing Date Title
CN201721546006.4U CN207866913U (en) 2017-11-19 2017-11-19 The shield effectiveness of shielding case body tests emitter

Publications (1)

Publication Number Publication Date
CN207866913U true CN207866913U (en) 2018-09-14

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111694061A (en) * 2020-05-13 2020-09-22 东华理工大学 Multi-dipole-source emission device applied to electromagnetic exploration

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111694061A (en) * 2020-05-13 2020-09-22 东华理工大学 Multi-dipole-source emission device applied to electromagnetic exploration

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Address after: 222001 No.18 Shenghu Road, Lianyungang City, Jiangsu Province

Patentee after: The 716th Research Institute of China Shipbuilding Corp.

Address before: 222001 No.18 Shenghu Road, Lianyungang City, Jiangsu Province

Patentee before: 716TH RESEARCH INSTITUTE OF CHINA SHIPBUILDING INDUSTRY Corp.