CN108802544A - A kind of flexible adjustable electromagnetic shielding performance testing device of test window size - Google Patents
A kind of flexible adjustable electromagnetic shielding performance testing device of test window size Download PDFInfo
- Publication number
- CN108802544A CN108802544A CN201810947489.1A CN201810947489A CN108802544A CN 108802544 A CN108802544 A CN 108802544A CN 201810947489 A CN201810947489 A CN 201810947489A CN 108802544 A CN108802544 A CN 108802544A
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- sample
- test window
- window
- test
- performance testing
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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
- G01R1/18—Screening arrangements against electric or magnetic fields, e.g. against earth's field
Abstract
The invention discloses a kind of flexible adjustable electromagnetic shielding performance testing devices of test window size, including shielding cavity, sample test window, signal emits equipment, signal receiver and antenna, the sample test window is provided with matched sample test window cover board and sample crimping plate, the sample test window includes the parent window being arranged in shielding cavity cavity wall, the child window opened up on test window cover board, the size of sample test window is adjusted by the way that various sizes of child window realization is arranged, the electromagnetic signal that signal emits between equipment and signal receiver is transmitted by test window and with antenna, the electromagnetic signal received when whether being placed with sample by contrast test window, calculate the shield effectiveness of sample.The electromagnetic shielding performance testing device of the present invention using the above structure can meet a variety of various sizes of maturing material electromagnet shield effect tests and Combined Electromagnetic Shielding Materials design and development.
Description
Technical field
The invention belongs to electromagnetic shielding material shield effectiveness technical field of measurement and test, and in particular to a kind of test window size spirit
Adjustable electromagnetic shielding performance testing device living.
Background technology
The fast development of electronic science and technology and the communication technology, electronics, electric device and a large amount of of wireless telecom equipment answer
With making space be flooded with the electromagnetic wave that a large amount of frequencies are different, energy is different.At the same time, electronics, electrical equipment collect towards height
Cheng Hua, miniaturization, lightweight and digitlization direction are developed, and sensitivity is higher and higher, it is easy to by external electromagnetic wave interference
It breaks down.In addition, electromagnetic wave has human neural cells, brain tissue, DNA, gene and immune system different degrees of influence：
The low-frequency electromagnetic waves such as radio wave, microwave and infrared ray can cause chronic healthy problem to the sustained radiation of human body；High-frequency electromagnetic
Wave such as ultraviolet light, X-ray and gamma-rays can ionize and destroy cell moment, be damaged to physical function.In order to solve electromagnetism
Influence of the wave radiation to electronics, electrical equipment and human health, electromangnetic spectrum have gradually developed, and develop a variety of
Electromagnetic shielding material.
Shield effectiveness is the important parameter for weighing material electromagnetic shielding capability, and the accurate shield effectiveness for measuring material is in fact
There is border security application vital meaning, people also therefore to have developed a variety of electromagnet shield effect test methods, such as：Flange
Coaxial device method, screened room method, Specimen Method, Reverberation room method etc..Flange coaxial installation method is a kind of relatively conventional shield effectiveness
Test method, this method is simple to operate, measurement result is accurate and is reached without too high request, material diameter to sample size
100mm can meet test；However, this method is only capable of the electromagnetic screen in 30MHz~1.5GHz frequency ranges to shielding material
Efficiency is covered to be tested, it can measured frequency be low, narrow range, it is difficult to meet material high-frequency electromagnetic shielding effect test demand.Screened room
Method can carry out shield effectiveness test, test frequency to the electromagnetic shielding material that size is 300mm × 300mm and 600mm × 600mm
10kHz~40GHz；This method frequency coverage is wide, test result is more accurate, but the screened room that screened room method requires is built
It is of high cost, while requiring sample that there is large-size, its practical application is limited to a certain extent, especially in Novel screen
Material laboratory exploitation, design aspect are covered, is even more to highlight the drawbacks of this method, because new in laboratory development phase
Material will accomplish that 300mm × 300mm is less susceptible to, and accomplish that 600mm × 600mm is even more difficulty, i.e., enabled to accomplish corresponding ruler
It is very little, can also there be high cost problem.Xibei Nuclear Techn Inst Liu proposes use " Specimen Method " development material along female et al.
Expect that electromagnet shield effect test, this method do not need microwave dark room, can solve some engineering material (such as：Cement) electromagnetic shielding effect
The problem that can be tested；But the problems such as there are test material preparation difficulty to be measured for the method greatly, test result consistency is poor, is especially difficult to
Meet the shield effectiveness test of electromagnetic shielding material newly developed.Reverberation room method, as the material screen gradually to grow up in recent years
Effect test method is covered, by internal frequency stirring, external churned mechanically method, can get more uniform field environment；But
Reverberation chamber involves great expense, and shield effectiveness test method is incomplete, measuring accuracy is also not high enough.
Therefore, invent a kind of test window size can flexible modulation, meet a variety of different materials (including maturing material and reality
Test room and newly grind material) testing requirement, test result be accurate and low-cost shield effectiveness test device, and it is not only ripe to promoting
Material electromagnet shield effect is studied, and is of great significance with exploitation to novel shielding design of material.
Invention content
The invention discloses a kind of flexible adjustable electromagnetic shielding performance testing device of test window size, solve at present
Same electromagnetic shielding performance testing device is difficult to meet the problem of a variety of different size material shield effectiveness accurate testing requirement, special
It is not newly to grind scantling for laboratory to be difficult to do big present situation, by the matching used test window of sample test window
Cover board opens up various sizes of child window, realizes and tests the electromagnet shield effect of different sample sizes.
The present invention to achieve the above object, is achieved through the following technical solutions：
A kind of flexible adjustable electromagnetic shielding performance testing device of test window size, it is characterised in that including shielding cavity,
Sample test window, signal transmitting equipment, signal receiver and antenna,
For placing sample, the sample test window is provided with matched the sample test window
Sample test window cover board and sample crimp plate,
The sample crimps plate by sample and is fixed on sample test window,
The sample test window includes that parent window in shielding cavity cavity wall, the son that is opened up on test window cover board is arranged
Window,
The size of sample test window is adjusted by the way that various sizes of child window realization is arranged,
The signal transmitting equipment is arranged in test window side, is located at outside shielding cavity, described for generating electromagnetic signal
Signal receiver is arranged in the test window other side, is located in shielding cavity, for receiving electromagnetic signal,
The electromagnetic signal is transmitted by test window and with antenna,
The electromagnetic signal received when whether being placed with sample by contrast test window, and pass through following formula meter
Calculate the shield effectiveness of sample
Wherein：SE is the shield effectiveness of sample, P0The signal of sample decaying, P are not placed for test window1For
Place the signal of sample decaying.
In the above-mentioned technical solutions, the antenna includes transmitting antenna and reception antenna, and the transmitting antenna is fixed on letter
Number transmitting equipment in transmitting holder on, the reception antenna is fixed on the reception holder in receiving device.
In the above-mentioned technical solutions, the sample test window is provided with the reed trough for placing reed along its window side.
In the above-mentioned technical solutions, the reed is beryllium copper reed.
In the above-mentioned technical solutions, the reed trough outer edge is provided with conductive rubber slot, the conductive rubber slot is used
In placement conductive rubber.
In the above-mentioned technical solutions, each child window is each provided with matched child window cover board and detected sample
Product crimp plate.
In the above-mentioned technical solutions, the sample test window is provided with for dismantling test window cover board and sample
Crimp the locating pin of plate.
In the above-mentioned technical solutions, the test window cover board and sample crimping plate are fixed on survey by clamp device
It tries on window.
In the above-mentioned technical solutions, the clamp device includes bolt and reed-type fixture.
In the above-mentioned technical solutions, the test window cover board is provided with handle.
In conclusion by adopting the above-described technical solution, the invention has the advantages that：
The sample test window size adjustable of shielding cavity in the present invention can meet a variety of various sizes of maturing material electricity
Magnetic screen effect test and Combined Electromagnetic Shielding Materials design and development.Simultaneously as test window is flexibly adjustable, compensate for
The shortcomings that existing common test device limits sample size, is greatly enlarged the application range of test device.
The electromagnetic shielding test device of the present invention is of low cost, and entire sample test process is easy to operate, can frequency measurement band model
Width is enclosed, and test result is accurate and reliable, can not only promote maturing material electromagnetic shielding material effect research, and to novel shielding material
The design and development of material is of great significance.
Description of the drawings
Fig. 1 is the electromagnetic shielding performance testing device schematic diagram of the present invention.
Fig. 2 is the parent window realization method structural schematic diagram in 300mm × 300mm sample test windows.
Fig. 3 is the matching used testing window covering plate structure signal of parent window in 300mm × 300mm sample test windows
Figure.
Fig. 4 is the parent window testing window sample crimping plate in 300mm × 300mm sample test windows.
Fig. 5 is the 100mm × 100mm test windows (child window) opened up on 300mm × 300mm test window cover boards.
Fig. 6 is the cover board of 100mm × 100mm test windows (child window).
Fig. 7 is the sample crimping plate of 100mm × 100mm test windows (child window).
Fig. 8 is the 30mm × 30mm test windows (child window) opened up on 300mm × 300mm test window cover boards.
Fig. 9 is the cover board of 30mm × 30mm test windows (child window).
Figure 10 is the sample crimping plate of 30mm × 30mm test windows (child window).
Wherein：1, shielding cavity, 2, sample test window, 3, signal emit equipment, 4, signal receiver, 5,300mm ×
The parent window of 300mm sample tests, 6, reed, 7, conductive rubber, 8, bolt, 9, locating pin, 10,300mm × 300mm parent windows
Cover board, 11, bolt hole, 12, positioning nail hole, 13, handle, 14, the corresponding sample of 300mm × 300mm parent windows crimp plate,
15, the 100mm × 100mm child windows opened up on 300mm × 300mm test windows cover board, 16,100mm × 100mm child window lids
Plate, 17,100mm × 100mm samples crimp plate, 18, the 30mm opened up on 300mm × 300mm test window cover boards ×
The child window that 30mm is opened up, 19, the cover boards of 30mm × 30mm child windows, 20, the sample crimping of 30mm × 30mm child windows
Plate.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
As shown in Figure 1, a kind of flexible adjustable electromagnetic shielding performance testing device of test window size, including shielding cavity,
Sample test window, signal transmitting equipment, signal receiver and antenna.
Sample test window is arranged on shielding cavity, for placing sample, and sample test window be provided with
Its matching used sample test window cover board and sample crimp plate.Sample crimping plate is for fixing sample.
Signal emits equipment and is arranged in test window side, is located at outside shielding cavity, for generating electromagnetic signal.Signal receiver is being surveyed
The setting of the window other side is tried, is located in shielding cavity, for receiving electromagnetic signal.Signal emits between equipment and signal receiver
Electromagnetic signal be transmitted by test window and with antenna.Antenna includes transmitting antenna and reception antenna, and emits day
Line is fixed on the transmitting holder in signal transmitting equipment, and reception antenna is fixed on the reception holder in receiving device.
When sample carries out electromagnet shield effect test, mainly realized by following steps：
Step 1: sample test window does not place sample, it is P to measure its deamplification0；
Step 2: sample is placed on sample test window, and plate is crimped by sample, sample is fixed on sample
Test window, it is P then to measure its deamplification1；
Step 3: the shield effectiveness of sample is calculated by following formula,
Wherein, SE is the shield effectiveness of sample.
To meet the test of various sizes of electromagnetic material shield effectiveness, sample test window includes parent window and child window,
Wherein parent window is arranged in one of shielding cavity cavity wall, and child window (is matched with parent window in test window cover board
Test window cover board) on open up, pass through and various sizes of child window be set to realize the size adjusting to sample test window.
When sample size is less than parent window size, test window cover board can be fixed on parent window, selection opens up suitable dimension
The sample of small size is placed on child window by child window, then is fixed by crimping plate with its mating sample,
Can thus electromagnet shield effect test be carried out to various sizes of sample.As shown in Fig. 2 and Fig. 5, Fig. 8, wherein Fig. 2 is sample
Parent window structural schematic diagram in test window, size are 300mm × 300mm, and Fig. 5 is that (size is in test window cover board
300mm × 300mm) on the child window structural schematic diagram that opens up, the size of the child window is 100mm × 100mm, and Fig. 8 is to survey
The child window structural schematic diagram opened up on examination window cover board (size is 300mm × 300mm), the size of the child window be 30mm ×
30mm.The size that opens up of child window is not limited to this 100mm × 100mm and 30mm × 30mm, can be according to sample reality
The size on border is designed the matching used test window cover board of parent window.
Sample is placed on sample test window when being tested, to ensure that sample crimps plate and sample test window
Excellent electric contact, and reduce influence of the electromagnetic exposure to test result accuracy, in sample test window (parent window and sub- window
Mouthful) its window side is provided with reed trough, reed trough has clamped reed in sample test, which can select beryllium copper reed.
Reed trough outer edge is provided with conductive rubber slot, conductive rubber slot has clamped conducting resinl in sample test.
In addition, sample test window (parent window and child window) is provided with clamp device in reed and conducting resinl outer rim, just
In the fixation for crimping plate with test window cover board or sample, clamp device includes bolt and reed-type fixture, and is side
Just the dismounting of test window cover board and sample crimping plate, positioning is provided in the peripheral diagonal positions of sample test window
Nail, the quantity of locating pin and position can be designed according to actual conditions.Test window cover board is provided with to be coordinated with locating pin
Fixed positioning nail hole matches fixed bolt hole with bolt, and test window cover board is additionally provided with handle, facilitates test window
Cover board picks and places.As shown in Fig. 3, Fig. 4, Fig. 6, Fig. 7, Fig. 9 and Figure 10, parent window and each child window are respectively provided in test window
Have and crimp plate with matching used child window cover board and sample, even the sample of small size is mounted on child window in this way
When, it also has its corresponding window cover board and sample crimping plate is fixed, avoid falling during sample test, influence
Test result.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement etc., should all be included in the protection scope of the present invention made by within refreshing and principle.
Claims (10)
1. a kind of flexible adjustable electromagnetic shielding performance testing device of test window size, it is characterised in that including shielding cavity, sample
Product test window, signal transmitting equipment, signal receiver and antenna,
For the sample test window for placing sample, the sample test window is provided with matched sample
Test window cover board and sample crimp plate,
The sample crimps plate by sample and is fixed on sample test window,
The sample test window includes being arranged in the parent window of shielding cavity cavity wall, the sub- window opened up on test window cover board
Mouthful,
The size of sample test window is adjusted by the way that various sizes of child window realization is arranged,
The signal transmitting equipment is arranged in test window side, is located at outside shielding cavity, for generating electromagnetic signal, the signal
Receiving device is arranged in the test window other side, is located in shielding cavity, for receiving electromagnetic signal,
The electromagnetic signal is transmitted by test window and with antenna,
The electromagnetic signal received when whether being placed with sample by contrast test window, and quilt is calculated by following formula
The shield effectiveness of sample
Wherein：SE is the shield effectiveness of sample, P0Do not place the signal of sample decaying for test window,
P1To place the signal of sample decaying.
2. a kind of flexible adjustable electromagnetic shielding performance testing device of test window size according to claim 1, special
Sign is that the antenna includes transmitting antenna and reception antenna, and the transmitting antenna is fixed on the transmitting branch in signal transmitting equipment
On frame, the reception antenna is fixed on the reception holder in receiving device.
3. a kind of flexible adjustable electromagnetic shielding performance testing device of test window size according to claim 1, special
Sign is that the sample test window is provided with the reed trough for placing reed along its window side.
4. a kind of flexible adjustable electromagnetic shielding performance testing device of test window size according to claim 3, special
Sign is that the reed is beryllium copper reed.
5. the flexible adjustable electromagnetic shielding performance testing device of a kind of test window size according to claim 3, feature
It is that the reed trough outer edge is provided with conductive rubber slot, the conductive rubber slot is for placing conductive rubber.
6. a kind of flexible adjustable electromagnetic shielding performance testing device of test window size according to claim 1, special
Sign is that each child window is each provided with matched child window cover board and sample crimping plate.
7. a kind of flexible adjustable electromagnetic shielding performance testing device of test window size according to claim 1, special
Sign is that the sample test window is provided with and crimps the locating pin of plate for dismantling test window cover board and sample.
8. a kind of flexible adjustable electromagnetic shielding performance testing device of test window size according to claim 1, special
Sign is that the test window cover board and sample crimping plate are fixed on by clamp device on test window.
9. a kind of flexible adjustable electromagnetic shielding performance testing device of test window size according to claim 1, special
Sign includes bolt and reed-type fixture in the clamp device.
10. a kind of flexible adjustable electromagnetic shielding performance testing device of test window size according to claim 1, special
Sign is that the test window cover board is provided with handle.
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| CN201810947489.1A CN108802544A (en) | 2018-08-20 | 2018-08-20 | A kind of flexible adjustable electromagnetic shielding performance testing device of test window size |
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| CN201810947489.1A CN108802544A (en) | 2018-08-20 | 2018-08-20 | A kind of flexible adjustable electromagnetic shielding performance testing device of test window size |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110702999A (en) * | 2019-11-21 | 2020-01-17 | 中国工程物理研究院应用电子学研究所 | Strong electromagnetic pulse shielding effectiveness test system and method |
| CN112116795A (en) * | 2020-08-04 | 2020-12-22 | 中国原子能科学研究院 | Method and device for testing instantaneous response of nuclear critical accident alarm |
| CN113419114A (en) * | 2021-05-13 | 2021-09-21 | 北京航空航天大学 | Miniaturized broadband electromagnetic shielding testing device and testing method |
| CN113484633A (en) * | 2021-06-07 | 2021-10-08 | 中国工程物理研究院应用电子学研究所 | Shielding effectiveness test system and method suitable for electromagnetic protection performance test of artificial material |
| CN113899962A (en) * | 2021-08-24 | 2022-01-07 | 中国工程物理研究院应用电子学研究所 | System and method for testing high-power microwave protection efficiency of rear door protection device |
| CN113945833A (en) * | 2021-09-29 | 2022-01-18 | 清华大学 | Method and platform for testing total ionizing radiation dose and electromagnetic radiation synergistic effect |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110702999A (en) * | 2019-11-21 | 2020-01-17 | 中国工程物理研究院应用电子学研究所 | Strong electromagnetic pulse shielding effectiveness test system and method |
| CN110702999B (en) * | 2019-11-21 | 2022-03-01 | 中国工程物理研究院应用电子学研究所 | Strong electromagnetic pulse shielding effectiveness test system and method |
| CN112116795A (en) * | 2020-08-04 | 2020-12-22 | 中国原子能科学研究院 | Method and device for testing instantaneous response of nuclear critical accident alarm |
| CN113419114A (en) * | 2021-05-13 | 2021-09-21 | 北京航空航天大学 | Miniaturized broadband electromagnetic shielding testing device and testing method |
| CN113484633A (en) * | 2021-06-07 | 2021-10-08 | 中国工程物理研究院应用电子学研究所 | Shielding effectiveness test system and method suitable for electromagnetic protection performance test of artificial material |
| CN113484633B (en) * | 2021-06-07 | 2023-04-21 | 中国工程物理研究院应用电子学研究所 | Shielding efficiency test system and method suitable for electromagnetic shielding performance test of artificial material |
| CN113899962A (en) * | 2021-08-24 | 2022-01-07 | 中国工程物理研究院应用电子学研究所 | System and method for testing high-power microwave protection efficiency of rear door protection device |
| CN113899962B (en) * | 2021-08-24 | 2023-04-25 | 中国工程物理研究院应用电子学研究所 | System and method for testing high-power microwave protection efficiency of back door protection device |
| CN113945833A (en) * | 2021-09-29 | 2022-01-18 | 清华大学 | Method and platform for testing total ionizing radiation dose and electromagnetic radiation synergistic effect |
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Application publication date: 20181113 |