CN109613371A - Portable strong electromagnetic environment simulation test platform and test method - Google Patents
Portable strong electromagnetic environment simulation test platform and test method Download PDFInfo
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- CN109613371A CN109613371A CN201811581323.9A CN201811581323A CN109613371A CN 109613371 A CN109613371 A CN 109613371A CN 201811581323 A CN201811581323 A CN 201811581323A CN 109613371 A CN109613371 A CN 109613371A
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- 238000012360 testing method Methods 0.000 title claims abstract description 61
- 238000004088 simulation Methods 0.000 title claims abstract description 19
- 238000010998 test method Methods 0.000 title claims abstract description 7
- 239000004744 fabric Substances 0.000 claims abstract description 58
- 230000007613 environmental effect Effects 0.000 claims description 22
- 238000006243 chemical reaction Methods 0.000 claims description 12
- 230000005684 electric field Effects 0.000 claims description 8
- 239000013307 optical fiber Substances 0.000 claims description 6
- 230000005855 radiation Effects 0.000 claims description 5
- 230000000694 effects Effects 0.000 claims description 3
- 238000002813 epsilometer test Methods 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000010606 normalization Methods 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 238000013019 agitation Methods 0.000 description 9
- 230000005611 electricity Effects 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000010907 mechanical stirring Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 2
- 241000209761 Avena Species 0.000 description 1
- 235000007319 Avena orientalis Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000036039 immunity Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
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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
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Abstract
The invention discloses a portable strong electromagnetic environment simulation test platform and a test method, wherein the test platform comprises a reverberation chamber, a signal emission device and a shielding cloth driving device, the reverberation chamber comprises a three-dimensional frame structure and shielding cloth covering the surface of the frame structure, the three-dimensional frame structure is connected through dielectric rods, the shielding cloth forms a fold structure on each wall surface of the three-dimensional frame structure, an emission antenna of the signal emission device is positioned in the reverberation chamber, and the signal emission device is used for emitting a test signal into the reverberation chamber through the emission antenna; and the power output end of the shielding cloth driving device is connected with the central point of the shielding cloth on one wall surface of the reverberation chamber and is used for driving the shielding cloth to vibrate. The test platform is easy to construct, low in manufacturing cost, capable of effectively reducing the lowest available frequency and high in test speed.
Description
Technical field
The present invention relates to the measuring device of electronic system electromagnetic compatibility and method and technology field, more particularly to one kind are portable
Strong electromagnetic environmental simulation test platform and test method.
Background technique
Electricity with the raising of electronic system integrated level, between equipment and equipment, equipment and system and system and system
Compatible (Electromagnetic Compatibility, the EMC) problem of magnetic becomes increasingly conspicuous, significantly impacts electronic system or set
Standby performance.Experiment measurement is to solve the problems, such as the key technology means of EMC, therefore the test for capableing of quantitative study EMC problem is flat
Platform is a research hotspot.Reverberation chamber (Reverberation Chamber) be after anechoic chamber, (Anechoic Chamber),
Pulse voltage generator (Gigahertz TEM cell, GTEM), open area test site (Open Area Test Site,
OATS the EMC proposed after) tests new platform.Common mechanical agitation type reverberation chamber is that one or more is installed inside shield
A mechanical agitator changes boundary condition by the continuous or stepping rotation of blender, to form space in chamber interior
Count uniform, isotropism, random polarization field.Its typical structure is as shown in Figure 1.
Reverberation chamber technology is widely used in radiation immunity, radiation-emitting, cable, material, small cavity shield effectiveness efficiency
In the measurement of (Shielding Effectiveness, SE), TV university cavity the simulation of diffusion field (diffused field) with
Coupling Rule research, measurement of pulsed field etc., and gradually it is extended to aerospace, automobile and automotive electronics, sanitary equipment, big
Type electronic system, the multi input of mobile communication field, multi output (Multichannel Input and Out Put, MIMO)
The fields such as the measuring technique of electromagnetic environment simulation and antenna performance.Reverberation chamber technology has huge application prospect in the field EMC,
It is a current international research hotspot.
During studying and using reverberation chamber, it has been found that mechanical agitation type reverberation chamber comes with some shortcomings: first is that
Mechanical stirring device is mounted with inside mechanical agitation type reverberation chamber, reduces the available test space, horizontally disposed mechanical stirring
Device is placed for a long time can be because deformation occurs for gravity, and vertically disposed mechanical agitator is when stepping is rotated since blender rotation is used
Property it is larger be unable to fast and stable stopping, causing mechanical agitation type reverberation chamber test take long time；Second is that mechanical agitation type reverberation chamber
Involve great expense, as a geometric dimension be 10.5m × 8m × 4.3m reverberation chamber only build shell if at least need 3,000,000；
Third is that cannot dismantle, move substantially after mechanical agitation type reverberation chamber is built up, need to dismantle and transport equipment under test to having machinery
The relevant unit of stirring-type reverberation chamber is tested, and on-the-spot test is unfavorable for, and the presence of these problems affects mechanical agitation type
The popularization of reverberation chamber uses.
Summary of the invention
Technical problem to be solved by the invention is to provide one kind be easy to building, low cost, can effectively reduce it is minimum can
With frequency and the portable strong electromagnetic environmental simulation test platform of test speed fastly.
In order to solve the above technical problems, the technical solution used in the present invention is: a kind of portable strong electromagnetic environmental simulation
Test platform, it is characterised in that: including reverberation chamber, sender unit and shielding cloth driving device, the reverberation chamber includes
The three-dimensional frame structure connected by dielectric rod and the shielding cloth for being covered on the frame structure surface, the shielding cloth is three
The each wall surface for tieing up frame structure forms pleated structure, 8 vertex of the three-dimensional frame structure and 12 ribs respectively with screen
Cloth is covered to fix；The transmitting antenna of the sender unit is located in the reverberation chamber, and the sender unit is for passing through
The transmitting antenna emits test signal into the reverberation chamber；The power output end of the shielding cloth driving device is mixed with described
The central point connection for ringing the shielding cloth on room on a wall surface, for driving the shielding cloth to vibrate.
A further technical solution lies in: the test platform further includes field intentisy meter, and the field intentisy meter is located at the reverberation
Interior, for monitoring the indoor electric field strength of reverberation.
A further technical solution lies in: the sender unit includes signal source, power amplifier, directional couple
Device, power meter and transmitting antenna, the signal output end of the signal source are connect with the signal input part of the power amplifier,
The signal output end of the power amplifier is connect with the signal input part of the directional coupler, the letter of the directional coupler
Number output end is connect with the signal input part of the power meter and the transmitting antenna respectively.
A further technical solution lies in: the shielding cloth driving device includes control computer, stepper motor, power side
Formula conversion equipment and connecting rod, the control output end of the computer are connect with the control signal of the stepper motor, the step
Power output end into motor is connect with the power intake of the power mode conversion equipment, the power mode conversion equipment
Power output end connect with one end of the connecting rod, the screen on the other end of the connecting rod and the reverberation chamber on a wall surface
Cover the central point connection of cloth.
A further technical solution lies in: the field intentisy meter is placed on inside the working region in reverberation chamber, passes through optical fiber
It is connect with the control computer outside reverberation chamber.
The invention also discloses a kind of test methods of portable strong electromagnetic environmental simulation test platform, it is characterised in that packet
Include following steps:
1) three-dimensional frame structure for passing through dielectric rod transverse and longitudinal cross conformation reverberation chamber first, is then covered on three for shielding cloth
Frame structure surface is tieed up, the Three Dimensional Cavities that each wall surface is propped up by shielding cloth are formed；Shielding cloth geometric dimension compares three-dimensional box
Frame structure is slightly larger, pleated structure is formed in each wall surface of three-dimensional frame structure, by 8 vertex of three-dimensional frame structure and 12
Rib is fixed with shielding cloth, forms reverberation chamber；One end of the central point of the one of wall surface of reverberation chamber and connecting rod is fastenedly connected,
The other end of connecting rod is connected through the power output end of power mode conversion equipment and stepper motor, and the rotation of stepper motor drives
Connecting rod stretching motion, by adjusting the motion amplitude of connecting rod, adjusts shielding so that shielding cloth be driven to move in wall surface normal direction
The amplitude of cloth vibration；
2) setting signal source, power amplifier, directional coupler and power meter outside reverberation chamber, the output of the signal source
End connects the input terminal of directional coupler through power amplifier, and the output end of the directional coupler connects power meter and transmitting respectively
Antenna, the transmitting antenna are placed on any one corner inside reverberation chamber, and aerial radiation direction direction places antenna corner pair
The apex angle for the reverberation chamber answered；Field intentisy meter is placed inside the working region in reverberation chamber, passes through the control outside optical fiber and reverberation chamber
Computer connection processed；
3) keep the parked position of shielding cloth motionless, setting signal source tranmitting frequency, the signal source tranmitting frequency is electricity
The test frequency that the test of subsystem electromagnetic environmental effects needs, the input power of reverberation chamber is calculated according to formula (1), and selection is suitable
Power amplifier gain, the emitted antenna of signal is emitted to inside reverberation chamber；
In above formula:
Pinput: indicate that reverberation chamber generates the forward direction input power of required field intensity value；
Etest: it indicates the field strength of test request, is given value；
CLF (f): it indicates reverberation chamber load factor, is the function of frequency；
Indicate the average value of normalization field strength when reverberation chamber is disposably calibrated；
4) Wall Vibration that the stepper motor drives the reverberation chamber is controlled by the computer, it is ensured that tested electricity
Subsystem has enough residence times to be exposed under electromagnetic environment, and the electromagnetic environmental effects for recording tested electronic system are existing
As；
5) change the signal source tranmitting frequency, provide its of needs for tested electronic system electromagnetic environmental effects test
Its test frequency repeats step 3)~step 4), obtains the electromagnetism ring of electronic system under signal source tranmitting frequency after the change
Border effect.
The beneficial effects of adopting the technical scheme are that reverberation chamber and consubstantiality in herein described test platform
Long-pending mechanical agitation type reverberation chamber (metal shell) is compared, and the low frequency characteristic of reverberation chamber can be improved, and increase can use the test space,
The testing time is saved, and cheap, on-the-spot test can be able to carry out with with building, it is not necessary to disassembly and the tested electronics of transport
The electromagnetic environment of equipment, the inside cavity weaker for simulation aircraft cabin and this type shield effectiveness of warship cabin is more true
Effectively.
Detailed description of the invention
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
Fig. 1 is the typical structure schematic diagram of mechanical stirring reverberation chamber in the prior art；
Fig. 2 is the partial schematic block diagram of test platform described in the embodiment of the present invention；
Fig. 3 is the functional block diagram of test platform described in the embodiment of the present invention；
Wherein: 1, shielding cloth；2, connecting rod；3, signal source；4, interface adapter board；5, cable connection plate；6, transmitting antenna；
7, receiving antenna；8, blender replaces position；9, mechanical agitator；10, the test space can be used；11, non-conductive support platform；12,
Power-supply filter；13, driving motor；14, EUT monitoring device.
Specific embodiment
With reference to the attached drawing in the embodiment of the present invention, technical solution in the embodiment of the present invention carries out clear, complete
Ground description, it is clear that described embodiment is only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
In the following description, numerous specific details are set forth in order to facilitate a full understanding of the present invention, but the present invention can be with
Implemented using other than the one described here other way, 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 the specific embodiments disclosed below.
As shown in Fig. 2-Fig. 3, the embodiment of the invention discloses a kind of portable strong electromagnetic environmental simulation test platforms, including
Reverberation chamber, sender unit, field intentisy meter and shielding cloth driving device.The reverberation chamber includes being connected by dielectric rod
Three-dimensional frame structure and the shielding cloth for being covered on the frame structure surface, each wall of the shielding cloth in three-dimensional frame structure
Face forms pleated structure, and 8 vertex of the three-dimensional frame structure and 12 ribs are fixed with shielding cloth respectively；The signal hair
The transmitting antenna of injection device is located in the reverberation chamber, and the sender unit is used to mix by the transmitting antenna to described
It rings interior transmitting and tests signal；Screen on the power output end and the reverberation chamber of the shielding cloth driving device on a wall surface
The central point connection for covering cloth, for driving the shielding cloth to vibrate；The field intentisy meter is located in the reverberation chamber, mixed for monitoring
Indoor electric field strength is rung, further, the field intentisy meter is placed on inside the working region in reverberation chamber, by optical fiber and is mixed
Ring the control computer connection of outdoor.
The shield effectiveness of shielding cloth can achieve 50dB or more, it is assumed that the electric field strength inside reverberation chamber is 200V/m (electricity
Maximum electric field intensity required by most harsh military use product is examined to be also only 200V/m to electromagnetic radiation in the compatible test of magnetic),
Can be calculated and be transmitted to external electric field strength is about 0.6V/m, this when high power amplifier work even than itself generating
Radiation want small, also below most of field intentisy meter it is minimum test electric field strength (such as EMR-200 most low energy test 1V/m or more
Electric field strength).It can be considered that the reverberation chamber that shielding cloth is built up will not generate obviously the external world when carrying out experimental study
It influences, therefore may be implemented using shielding cloth building reverberation chamber.
Further, as shown in figure 3, the sender unit include signal source, power amplifier, directional coupler,
Power meter and transmitting antenna, the signal output end of the signal source are connect with the signal input part of the power amplifier, institute
The signal output end for stating power amplifier is connect with the signal input part of the directional coupler, the signal of the directional coupler
Output end is connect with the signal input part of the power meter and the transmitting antenna respectively.
Further, as shown in figure 3, the shielding cloth driving device includes control computer, stepper motor, power mode
Conversion equipment and connecting rod, the control output end of the computer are connect with the control signal of the stepper motor, the stepping
The power output end of motor is connect with the power intake of the power mode conversion equipment, the power mode conversion equipment
Power output end is connect with one end of the connecting rod, the shielding on the other end of the connecting rod and the reverberation chamber on a wall surface
The central point of cloth connects.
The embodiment of the invention also discloses a kind of test methods of portable strong electromagnetic environmental simulation test platform, including such as
Lower step:
1) three-dimensional frame structure for passing through dielectric rod transverse and longitudinal cross conformation reverberation chamber first, is then covered on three for shielding cloth
Frame structure surface is tieed up, the Three Dimensional Cavities that each wall surface is propped up by shielding cloth are formed；Shielding cloth geometric dimension compares three-dimensional box
Frame structure is slightly larger, pleated structure is formed in each wall surface of three-dimensional frame structure, by 8 vertex of three-dimensional frame structure and 12
Rib is fixed with shielding cloth, forms reverberation chamber；One end of the central point of the one of wall surface of reverberation chamber and connecting rod is fastenedly connected,
The other end of connecting rod is connected through the power output end of power mode conversion equipment and stepper motor, and the rotation of stepper motor drives
Connecting rod stretching motion, by adjusting the motion amplitude of connecting rod, adjusts shielding so that shielding cloth be driven to move in wall surface normal direction
The amplitude of cloth vibration；
2) setting signal source, power amplifier, directional coupler and power meter outside reverberation chamber, the output of the signal source
End connects the input terminal of directional coupler through power amplifier, and the output end of the directional coupler connects power meter and transmitting respectively
Antenna, the transmitting antenna are placed on any one corner inside reverberation chamber, and aerial radiation direction direction places antenna corner pair
The apex angle for the reverberation chamber answered；Field intentisy meter is placed inside the working region in reverberation chamber, passes through the control outside optical fiber and reverberation chamber
Computer connection processed；
3) keep the parked position of shielding cloth motionless, setting signal source tranmitting frequency, the signal source tranmitting frequency is electricity
The test frequency that the test of subsystem electromagnetic environmental effects needs, the input power of reverberation chamber is calculated according to formula (1), and selection is suitable
Power amplifier gain, the emitted antenna of signal is emitted to inside reverberation chamber；
In above formula:
Pinput: indicate that reverberation chamber generates the forward direction input power of required field intensity value；
Etest: it indicates the field strength of test request, is given value；
CLF (f): it indicates reverberation chamber load factor, is the function of frequency；
Indicate the average value of normalization field strength when reverberation chamber is disposably calibrated；
4) Wall Vibration that the stepper motor drives the reverberation chamber is controlled by the computer, it is ensured that tested electricity
Subsystem has enough residence times to be exposed under electromagnetic environment, and the electromagnetic environmental effects for recording tested electronic system are existing
As；
5) change the signal source tranmitting frequency, provide its of needs for tested electronic system electromagnetic environmental effects test
Its test frequency repeats step 3)~step 4), obtains the electromagnetism ring of electronic system under signal source tranmitting frequency after the change
Border effect.
Reverberation chamber is compared with the mechanical agitation type reverberation chamber (metal shell) of same volume in herein described test platform,
Can improve the low frequency characteristic of reverberation chamber, increase can use the test space, save the testing time, and cheap, can with with
It builds, is able to carry out on-the-spot test, it is not necessary to disassembly and the tested electronic equipment of transport, it is this kind of for simulation aircraft cabin and warship cabin
The electromagnetic environment of the weaker inside cavity of type shield effectiveness is more authentic and valid.
Claims (6)
1. a kind of portable strong electromagnetic environmental simulation test platform, it is characterised in that: including reverberation chamber, sender unit and
Shielding cloth driving device, the reverberation chamber include the three-dimensional frame structure connected by dielectric rod and are covered on the frame knot
The shielding cloth on structure surface, the shielding cloth form pleated structure, the three-dimensional framework knot in each wall surface of three-dimensional frame structure
8 vertex of structure and 12 ribs are fixed with shielding cloth respectively；The transmitting antenna of the sender unit is located at the reverberation
Interior, the sender unit are used to emit test signal into the reverberation chamber by the transmitting antenna；The shielding
The power output end of cloth driving device is connect with the central point of the shielding cloth on the reverberation chamber on a wall surface, for driving
State shielding cloth vibration.
2. portable strong electromagnetic environmental simulation test platform as described in claim 1, it is characterised in that: the test platform is also
Including field intentisy meter, the field intentisy meter is located in the reverberation chamber, for monitoring the indoor electric field strength of reverberation.
3. portable strong electromagnetic environmental simulation test platform as claimed in claim 1 or 2, it is characterised in that: the signal hair
Injection device includes signal source, power amplifier, directional coupler, power meter and transmitting antenna, and the signal of the signal source is defeated
Outlet is connect with the signal input part of the power amplifier, the signal output end of the power amplifier and the directional couple
The signal input part of device connects, the signal output end of the directional coupler respectively with the power meter and the transmitting antenna
Signal input part connection.
4. portable strong electromagnetic environmental simulation test platform as claimed in claim 1 or 2, it is characterised in that: the shielding cloth
Driving device includes control computer, stepper motor, power mode conversion equipment and connecting rod, the control output end of the computer
It is connect with the control signal of the stepper motor, the power output end of the stepper motor and the power mode conversion equipment
Power intake connection, the power output end of the power mode conversion equipment connect with one end of the connecting rod, the company
The other end of bar is connect with the central point of the shielding cloth on the reverberation chamber on a wall surface.
5. portable strong electromagnetic environmental simulation test platform as claimed in claim 2, it is characterised in that: the field intentisy meter is placed
Inside working region in reverberation chamber, it is connect by optical fiber with the control computer outside reverberation chamber.
6. a kind of test method of portable strong electromagnetic environmental simulation test platform, it is characterised in that include the following steps:
1) three-dimensional frame structure for passing through dielectric rod transverse and longitudinal cross conformation reverberation chamber first, is then covered on three-dimensional box for shielding cloth
Frame body structure surface forms the Three Dimensional Cavities that each wall surface is propped up by shielding cloth；Shielding cloth geometric dimension is than three-dimensional framework knot
Structure is slightly larger, forms pleated structure in each wall surface of three-dimensional frame structure, by 8 vertex of three-dimensional frame structure and 12 ribs with
Shielding cloth fixes, and forms reverberation chamber；One end of the central point of the one of wall surface of reverberation chamber and connecting rod is fastenedly connected, connecting rod
Other end connected through the power output end of power mode conversion equipment and stepper motor, the rotation of stepper motor drives connecting rod
Stretching motion, by adjusting the motion amplitude of connecting rod, adjusts shielding cloth vibration so that shielding cloth be driven to move in wall surface normal direction
Dynamic amplitude；
2) setting signal source, power amplifier, directional coupler and power meter outside reverberation chamber, the output end warp of the signal source
Power amplifier connects the input terminal of directional coupler, and the output end of the directional coupler connects power meter and transmitting day respectively
Line, the transmitting antenna are placed on any one corner inside reverberation chamber, and aerial radiation direction is corresponding towards antenna corner is placed
Reverberation chamber apex angle；Field intentisy meter is placed inside the working region in reverberation chamber, passes through the control outside optical fiber and reverberation chamber
Computer connection；
3) keep the parked position of shielding cloth motionless, setting signal source tranmitting frequency, the signal source tranmitting frequency is Department of Electronics
The test frequency that electromagnetic environmental effects test of uniting needs, the input power of reverberation chamber is calculated according to formula (1), selects suitable function
Rate amplifier gain, the emitted antenna of signal are emitted to inside reverberation chamber；
In above formula:
Pinput: indicate that reverberation chamber generates the forward direction input power of required field intensity value；
Etest: it indicates the field strength of test request, is given value；
CLF (f): it indicates reverberation chamber load factor, is the function of frequency；
Indicate the average value of normalization field strength when reverberation chamber is disposably calibrated；
4) Wall Vibration that the stepper motor drives the reverberation chamber is controlled by the computer, it is ensured that tested Department of Electronics
System has enough residence times to be exposed under electromagnetic environment, records the electromagnetic environmental effects phenomenon of tested electronic system；
5) change the signal source tranmitting frequency, provide other examinations of needs for tested electronic system electromagnetic environmental effects test
Frequency is tested, step 3)~step 4) is repeated, obtains the electromagnetic environment effect of electronic system under signal source tranmitting frequency after the change
It answers.
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| CN112415280A (en) * | 2020-11-26 | 2021-02-26 | 上海卫星装备研究所 | Spacecraft radiation emission test system and method based on electric wave reverberation chamber |
| CN112798885A (en) * | 2020-12-28 | 2021-05-14 | 中国电子产品可靠性与环境试验研究所（（工业和信息化部电子第五研究所）（中国赛宝实验室）） | Radiation testing device, radiation testing method, sample testing system and testing method |
| CN113406369A (en) * | 2021-06-17 | 2021-09-17 | 中国人民解放军63892部队 | Ultra-wideband time-varying motion multi-system multi-signal generation method |
| CN113433401A (en) * | 2021-06-01 | 2021-09-24 | 中国舰船研究设计中心 | Multi-source multi-channel complex electromagnetic environment simulation generation method |
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| CN116879666A (en) * | 2023-09-07 | 2023-10-13 | 合肥航太电物理技术有限公司 | High-intensity radiation field testing device for airborne equipment |
| CN118191483A (en) * | 2024-05-15 | 2024-06-14 | 中汽研新能源汽车检验中心(天津)有限公司 | System and method for testing electromagnetic environmental effect of reverberation indoor vehicle |
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