CN208443929U - Test macro for electromagnetic compatibility test - Google Patents
Test macro for electromagnetic compatibility test Download PDFInfo
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- CN208443929U CN208443929U CN201820547158.4U CN201820547158U CN208443929U CN 208443929 U CN208443929 U CN 208443929U CN 201820547158 U CN201820547158 U CN 201820547158U CN 208443929 U CN208443929 U CN 208443929U
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Abstract
The utility model provides a kind of test macro for electromagnetic compatibility test, test macro is connected between equipment under test power supply and equipment under test, it includes: test equipment, it connect with equipment under test power supply, for transmitting electromagnetic compatibility test information to equipment under test, and receive the feedback information that equipment under test is directed to electromagnetic compatibility test information；Host computer, for sending test instruction to test equipment, so that test equipment foundation test instruction output electromagnetic compatibility test information, and receive feedback information；Control module, for generating driving signal according to switching command；Matrix switch, the type for being switched according to driving signal selection matrix, to export electromagnetic compatibility test information to equipment under test by selected matrix switch conducting or interrupt test instrument.The a variety of different types of matrix switches of test system configurations provided by the utility model for electromagnetic compatibility test, can satisfy the electromagnetic compatibility test demand of different voltages and electric current environment.
Description
Technical field
The utility model relates to electromagnetic compatibility test fields, specifically, being related to a kind of survey for electromagnetic compatibility test
Test system.
Background technique
Electromagnetic compatibility test field, the conduction interference immunity to interference tested including radiofrequency field induction carried out on the power line,
Power end disturbance voltage, surge impact immunity to interference, electrical fast transient (eft) immunity to interference, damp oscillatory wave immunity to interference, voltage are temporary
The projects such as short interruptions and voltage change immunity to interference of drop.Test process is all to close tested set after completing a test item at present
It is standby, replace testing equipment, connection cables restart equipment under test, then carry out next test item, wherein equipment replacement,
Rewiring and starting equipment under test occupy a large amount of time, are unfavorable for promoting working efficiency and realize automatic test.It is existing
Some matrix switch de-vices are only applicable to control circuit or radio circuit, and operating voltage is low, electric current is small, poor anti jamming capability,
It is not suitable for the electromagnetic compatibility test condition of power supply of multiplicity and complicated interference environment in the process.
In view of this, the present invention provides a kind of test macros for electromagnetic compatibility test, are able to solve current electricity
Frequent shutdown thread-changing, existing matrix switch is needed not to be suitable for lacking for electromagnetic compatibility automatic test during magnetic compatibility test
It falls into, promotes working efficiency.
Utility model content
To solve the above problems, the utility model provides a kind of test macro for electromagnetic compatibility test, the survey
Test system is connected between equipment under test power supply and equipment under test, and the system includes:
Test equipment is connect with the equipment under test power supply, for transmitting electromagnetic compatibility test to the equipment under test
Information, and receive the feedback information that the equipment under test is directed to the electromagnetic compatibility test information；
Host computer is communicated with the test equipment, for sending test instruction to the test equipment, so that the survey
Test instrument exports the electromagnetic compatibility test information according to test instruction, and receives the described anti-of the test equipment transmission
Feedforward information；
Control module is communicated with the host computer, the switching command sent for receiving the host computer, according to institute
It states switching command and generates driving signal；
Matrix switch is communicated with the control module, for receiving the driving signal, and according to the driving signal
The type of selection matrix switch, it is defeated to the equipment under test to be connected by selected matrix switch or interrupt the test equipment
The access of the electromagnetic compatibility test information out.
One embodiment according to the present utility model, the matrix switch include at least the matrix switch of two types, no
It is connected and communicated between the matrix switch of same type, suitable for different voltage and electric current environment, for according to the driving
Signal conduction interrupts the test equipment to the equipment under test output electromagnetic compatibility test information.
One embodiment according to the present utility model, the test equipment are at least divided into two groups, every group of test equipment
It is connect with the matrix switch of a certain type, for defeated to the equipment under test under the control of the matrix switch of a certain type
The electromagnetic compatibility test information out.
One embodiment according to the present utility model, the system also includes:
Drive module is used to amplify the driving signal, to drive the matrix to open by amplified driving signal
It closes to complete to be connected and switch with the state interrupted.
One embodiment according to the present utility model, the system also includes:
Filter module is connected between different types of matrix switch, production when for eliminating matrix switch work
Raw interference signal.
One embodiment according to the present utility model, the system also includes:
Interface module is connected between the host computer and the control module, is used for transmission the switching command.
One embodiment according to the present utility model, the system also includes:
Power module is used to power to the interface module, the control module and the drive module.
One embodiment according to the present utility model, the matrix switch include relay matrix and contactor matrix.
One embodiment according to the present utility model, the test equipment include surge generator, group pulse generator, resistance
Appointing in Buddhist nun's alternating wave generator, voltage failure simulator, conducted immunity coupling uncoupling network and artificial mains network
One or any combination.
One embodiment according to the present utility model, the interface module pass through in USB interface, RS485 and Ethernet
Any one transmit the switching command.
The a variety of different types of matrixes of test system configurations provided by the utility model for electromagnetic compatibility test are opened
It closes, such as relay matrix and contactor matrix, low pressure low current can be met simultaneously and high-voltage great-current sample is diversified
Electromagnetic compatibility test demand, configures filter module between matrix switch, improves system reliability.By the utility model,
The test time during electromagnetic compatibility test can be greatly decreased, with upper computer software cooperation, it can be achieved that electromagnetic compatibility from
Dynamicization test reduces testing crew labor intensity, improves working efficiency.
Other features and advantages of the utility model will illustrate in the following description, also, partly from specification
In become apparent, or understood and implementing the utility model.The purpose of this utility model and other advantages can pass through
Specifically noted structure is achieved and obtained in the specification, claims and drawings.
Detailed description of the invention
Attached drawing is used to provide a further understanding of the present invention, and constitutes part of specification, practical with this
Novel embodiment is used together to explain the utility model, does not constitute limitations of the present invention.In the accompanying drawings:
Fig. 1 shows the test system structure frame for electromagnetic compatibility test of one embodiment according to the present utility model
Figure；
Fig. 2 shows the test system structure for electromagnetic compatibility test of another embodiment according to the present utility model
Block diagram；
Fig. 3 shows upper in the test macro for electromagnetic compatibility test of one embodiment according to the present utility model
Machine controls software flow pattern；
Fig. 4 shows in the test macro for electromagnetic compatibility test of one embodiment according to the present utility model and drives
Module circuit diagram；
Fig. 5 shows relay in the test macro for electromagnetic compatibility test of one embodiment according to the present utility model
Device matrix structure figure；
Fig. 6 shows in the test macro for electromagnetic compatibility test of one embodiment according to the present utility model and filters
Module circuit diagram；
Fig. 7 shows in the test macro for electromagnetic compatibility test of another embodiment according to the present utility model and filters
Wave module circuit diagram；And
Fig. 8 shows in the test macro for electromagnetic compatibility test of one embodiment according to the present utility model and contacts
Device matrix structure figure.
Specific embodiment
The embodiments of the present invention is described in detail below with reference to accompanying drawings and embodiments, whereby to the utility model
How applied technology method solves technical problem, and the realization process for reaching technical effect can fully understand and implement.
If it should be noted that do not constitute conflict, each feature in each embodiment and each embodiment in the utility model
It can be combined with each other, be formed by technical solution and both be within the protection scope of the present invention.
Meanwhile in the following description, for illustrative purposes and numerous specific details are set forth, it is practical new to this to provide
The thorough understanding of type embodiment.It will be apparent, however, to one skilled in the art, that the utility model can not have to
Here detail or described ad hoc fashion is implemented.
Fig. 1 shows the test system structure frame for electromagnetic compatibility test of one embodiment according to the present utility model
Figure.As shown in Figure 1, system is connected between equipment under test power supply A and equipment under test B, system includes test equipment 101, upper
Machine 102, control module 103 and matrix switch 104.
In the present invention, test equipment 101 is connect with equipment under test power supply A, for transmitting electromagnetism to equipment under test B
Compatibility test information, and receive the feedback information that equipment under test B is directed to electromagnetic compatibility test information.
Host computer 102 is communicated with test equipment 101, for sending test instruction to test equipment 101, so that test equipment
101 according to test instruction output electromagnetic compatibility test information, and receives the feedback information of the transmission of test equipment 101.
Control module 103 is communicated with host computer 102, for receiving the switching command of the transmission of host computer 102, according to switching
Instruction generates driving signal.
Matrix switch 104 is communicated with control module 103, for receiving driving signal, and according to driving signal selection matrix
The type of switch is surveyed with exporting electromagnetic compatibility to equipment under test B by selected matrix switch conducting or interrupt test instrument 101
Try the access of information.
Fig. 2 shows the test system structure for electromagnetic compatibility test of another embodiment according to the present utility model
Block diagram.As shown in Fig. 2, system includes test equipment 101, host computer 102, control module 103, matrix switch 104, drive module
201, filter module 202, interface module 203 and power module 204.Wherein, test equipment 101 include test equipment 101A,
Test equipment 101B, test equipment 101C and test equipment 101D.Matrix switch 104 includes relay matrix 1041 and connects
Tentaculum matrix 1042.
In general, equipment under test power supply A parallel output multichannel, per being connected all the way with the input terminal of test equipment, such as
Shown in Fig. 2, equipment under test power supply A defeated multichannel in parallel, respectively with test equipment 101A, test equipment 101B, test equipment 101C
And test equipment 101D connection.Specifically, equipment under test power supply A is used to provide working power for equipment under test B.It is tested to set
Stand-by power source A is configured according to the actual demand of equipment under test B, and meets the capacity of test equipment 101 and matrix switch 104 simultaneously
It is required that can be single phase alternating current power supply is also possible to DC power supply.The number of test equipment 101 can carry out according to the actual situation
Adjustment, the utility model restrict not to this.
As shown in Fig. 2, being connected between test equipment 101 in equipment under test power supply line, for being transmitted to equipment under test B
Electromagnetic compatibility test information, and receive the feedback information that equipment under test B is directed to electromagnetic compatibility test information.In practical applications,
Test equipment 101 is for generating interference waveform as defined in standard, while test equipment 101 also receives the feedback letter of equipment under test B
Breath.Test equipment 101 may include surge generator, group pulse generator, damped oscillation wave producer, voltage failure simulation
Device, conducted immunity coupling any one of uncoupling network and artificial mains network or any combination.
In practical applications, host computer 102 can be PC, for receiving the instruction of operator, pass to control
Molding block 103 and test equipment 101.The relevant control software of electromagnetic compatibility test system is run in host computer 102, according to such as
Row control shown in Fig. 3.
Fig. 3 shows upper in the test macro for electromagnetic compatibility test of one embodiment according to the present utility model
Machine controls software flow pattern.As shown in figure 3, medium to be interrupted in step S301.Then, test item is selected in step s 302
Mesh, the input test parameter in step S303.Then, judge whether the test parameter of input is correct in step s 304.If
Mistake, then return step S303 continues input test parameter.If correct, S305 is entered step, is read according to the project of selection
Take default relay channel.Relay control instruction is generated in step S306, sending filter control refers in step S307
It enables.
Then, PC control software is delayed in step S308 waits channel switching to complete.To survey in step S309
Test instrument sends test instruction, and in the feedback information of the medium test equipment to be read of this step S310.Finally in step S311
Middle generation test report.
In addition, in system as shown in Figure 2 also include interface module 203, interface module 203 be connected to host computer 102 with
Between control module 103, it is used for transmission switching command.In practice, interface module 203 passes through USB interface, RS485 and ether
Any one of net transmission switching command.
As shown in Fig. 2, control module 103 is connect with host computer 102, for receiving the switching command of the transmission of host computer 102,
To generate driving signal according to switching command.In practice, control module 103 can use fpga chip, be changed according to switching command
Become the level on corresponding I/O interface, level signal, that is, driving signal herein.
In addition, as shown in Fig. 2, test macro also includes power module 204.Power module 204 is used for interface module
203, control module 103 and drive module 201 are powered.Power module 204 can be low-voltage dc power supply in practice.
One embodiment according to the present utility model, matrix switch 104 include relay matrix 1041 and contactor square
Battle array 1042.In order to drive relay matrix 1041 can be with configuration driven module 201.Drive module 201 is used to receive level signal,
And amplify level signal, to drive 1041 matrix of relay matrix to complete conducting or the state interrupted switching.Fig. 4 shows root
According to drive module circuit diagram in the test macro for electromagnetic compatibility test of one embodiment of the utility model.Such as Fig. 4 institute
Show, 201 circuit of drive module utilizes the switching characteristic of triode, controls relay with the low-voltage signal that control module 103 exports
The conducting and interruption of KA coil power, to control the actuation of relay KA.
As shown in figure 4, circuit includes that triode T1 (playing on-off action), resistance R1 (for current limliting, reduce triode T1 function
Consumption), resistance R2 (ending triode T1 reliably) and diode D1 (reversed afterflow inhibits surge).The circuit course of work are as follows:
When 103 output signal of control module is high level, triode saturation conduction, relay coil obtains electric, contact actuation, test equipment
101 output equipment under test B input between or the channel conductive between test platform voltage source firewire and contactor coil, it is on the contrary
Then channel disconnects when 103 output signal of control module is low level.
In one embodiment, executing agency of the relay matrix 1041 as TCH test channel switching command, by multiple friendships
DC relay constitute, can be connected or interrupt under the control of drive module 201 equipment under test B power supply, and conducting or in
The power supply of 1042 coil of disconnecting tentaculum matrix.Fig. 5 shows the simultaneous for electromagnetism of one embodiment according to the present utility model
Hold relay matrix structure chart in the test macro of test.
Relay matrix is as shown in figure 5, relay (KA1-9) controls row and column as the node between matrix row and column
Between conducting and interruption, nine relays constitute three 1 × 3 matrix switches in example.Below to relay matrix
The course of work is illustrated: needing to test equipment under test with test equipment E in test process, it is only necessary to by upper
Position machine 102 issues the instruction of closure KA1, KA4, can channel between continuity test instrument E and equipment under test B.If test
The channel for needing to use the control of contactor 1 in the process only needs host computer 102 to issue the instruction of closure KA7, can conducting contact device
1 coil power, so that contactor 1 is closed.The control mode of other contactor coils and the control mode class of 1 coil of contactor
Seemingly, the utility model repeats no more.
It in one embodiment, also include filter module 202 between relay matrix 1041 and contactor matrix 1042.
Filter module 202 is used to eliminate the interference signal generated when matrix switch work, and in practice, filter module 202 is connected to relay
The spark that the counter electromotive force and contact that coil generates between device contact and contactor coil, when can filter out contactor movement generate
Interference avoids control module 103 from malfunctioning or restart, improves the reliability of test macro.Fig. 6 and Fig. 7 shows two kinds
The circuit diagram of filter module.
Fig. 6 shows in the test macro for electromagnetic compatibility test of one embodiment according to the present utility model and filters
Module circuit diagram.
202 circuit of filter module guarantees that the 50Hz that contactor coil needs is handed over as shown in fig. 6, using RC low-pass filter
Galvanic electricity source is passed through with low-loss, the spark that the counter electromotive force and contact that contactor coil generates when filtering out contactor movement generate
Interference, avoids the above interference effect system power supply.
202 course of work of filter module as shown in FIG. 6 are as follows: after the relay contact in relay matrix 1041 is attracted,
Electric current gives contactor KM coil power supply by resistance R3, while (resistance value of R3 can adjust the charge and discharge speed of C1 for capacitor C1 charging
Degree), contactor coil obtains electric back contact and is closed, the channel conductive controlled, the interference generated in the action process coil of contact
By capacitance short-circuit, energy is consumed in the closed circuit that capacitor is formed with coil, avoids the influence to system power supply.
Fig. 7 shows in the test macro for electromagnetic compatibility test of another embodiment according to the present utility model and filters
Wave module circuit diagram.As shown in fig. 7, filter module 202 can also use bandpass filter, by reasonably selecting cutoff frequency,
Achieving the purpose that, which only allows 50Hz to exchange, passes through and filters out contactor coil interference.
In practical applications it is save the cost, bandpass filter as shown in Figure 7 can be formed using resistance, capacitor.Figure
Middle resistance R5 and capacitor C3 forms low-pass filter, and resistance R4 and capacitor C2 form high-pass filter, HPF Cutoff frequency
Rate is lower than low-pass filter, bandpass filter is constituted after two kinds of filter banks, by reasonably selecting device parameters
Achieve the purpose that electric current near 50Hz is only allowed to pass through.
As shown in Fig. 2, contactor matrix 1042 is connected to after filter module 202, controlled under relay driving tested
The on-off of equipment B power supply circuit.Since high voltage, high current interference, example can be generated during the certain project testings of electromagnetic compatibility
Such as surge immunity test, the test of damp oscillatory wave immunity to interference, relay may be damaged, as the supplement of relay matrix, after
It is configured with contactor matrix 1042 outside relay matrix 1041, can be automatically selected and be connect according to test item under the control of control software
Tentaculum access avoids high-voltage great-current from damaging relay.
Fig. 8 shows in the test macro for electromagnetic compatibility test of one embodiment according to the present utility model and contacts
Device matrix structure figure.As shown in figure 8, contactor (KM1, KM2 and KM3) is as the node between matrix row and column, control row
Conducting and interruption between column can use triple pole contactor, the i.e. controllable test equipment of a contactor and equipment under test
Between a channel conducting and interruption.
As shown in figure 8, need to only control host computer if necessary to test using test equipment 101H equipment under test B
102 issue the instruction of closure KM1, and after control software parsing, control module 103 changes the level of corresponding I/O interface, driving
The corresponding actuating of relay, relay control the coil closure of KM1 contactor again, the conducting in channel can be realized.
The a variety of different types of matrixes of test system configurations provided by the utility model for electromagnetic compatibility test are opened
It closes, such as relay matrix and contactor matrix, low pressure low current can be met simultaneously and high-voltage great-current sample is diversified
Electromagnetic compatibility test demand, configures filter module between matrix switch, improves system reliability.By the utility model,
The test time during electromagnetic compatibility test can be greatly decreased, with upper computer software cooperation, it can be achieved that electromagnetic compatibility from
Dynamicization test reduces testing crew labor intensity, improves working efficiency.
" one embodiment " or " embodiment " mentioned in specification means the special characteristic described in conjunction with the embodiments, structure
Or characteristic includes at least one embodiment of the utility model.Therefore, the phrase " one that specification various places throughout occurs
A embodiment " or " embodiment " might not refer both to the same embodiment.
Although above-mentioned example is for illustrating principle of the utility model in one or more application, for this field
For technical staff, without departing substantially from the principles of the present invention and thought, hence it is evident that can in form, usage and reality
Various modifications may be made in the details applied and does not have to make the creative labor.Therefore, the utility model by appended claims Lai
It limits.
Claims (10)
1. a kind of test macro for electromagnetic compatibility test, which is characterized in that the test macro is connected to equipment under test electricity
Between source and equipment under test, the system includes:
Test equipment is connect with the equipment under test power supply, for transmitting electromagnetic compatibility test information to the equipment under test,
And receive the feedback information that the equipment under test is directed to the electromagnetic compatibility test information；
Host computer is communicated with the test equipment, for sending test instruction to the test equipment, so that the tester
Device exports the electromagnetic compatibility test information according to test instruction, and receives the feedback letter of the test equipment transmission
Breath；
Control module is communicated with the host computer, the switching command sent for receiving the host computer, to cut according to
It changes instruction and generates driving signal；
Matrix switch is communicated with the control module, for receiving the driving signal, and it is selected according to the driving signal
The type of matrix switch exports institute to the equipment under test to be connected or interrupt the test equipment by selected matrix switch
State the access of electromagnetic compatibility test information.
2. being used for the test macro of electromagnetic compatibility test as described in claim 1, which is characterized in that the matrix switch is at least
Matrix switch comprising two types connects and communicates between different types of matrix switch, suitable for different voltage and
Electric current environment exports the electromagnetism to the equipment under test for being connected or interrupting the test equipment according to the driving signal
The access of compatibility test information.
3. being used for the test macro of electromagnetic compatibility test as claimed in claim 2, which is characterized in that the test equipment is at least
Two groups are divided into, every group of test equipment is connect with the matrix switch of a certain type, for opening in the matrix of a certain type
The electromagnetic compatibility test information is exported to the equipment under test under the control of pass.
4. being used for the test macro of electromagnetic compatibility test as claimed in claim 3, which is characterized in that the system also includes:
Drive module is used to amplify the driving signal, to drive the matrix switch complete by amplified driving signal
Switch at conducting with the state interrupted.
5. being used for the test macro of electromagnetic compatibility test as claimed in claim 4, which is characterized in that the system also includes:
Filter module is connected between different types of matrix switch, generates when for eliminating matrix switch work
Interference signal.
6. being used for the test macro of electromagnetic compatibility test as claimed in claim 5, which is characterized in that the system also includes:
Interface module is connected between the host computer and the control module, is used for transmission the switching command.
7. being used for the test macro of electromagnetic compatibility test as claimed in claim 6, which is characterized in that the system also includes:
Power module is used to power to the interface module, the control module and the drive module.
8. being used for the test macro of electromagnetic compatibility test as claimed in claim 7, which is characterized in that the matrix switch includes
Relay matrix and contactor matrix.
9. being used for the test macro of electromagnetic compatibility test as claimed in claim 8, which is characterized in that the test equipment includes
Surge generator, group pulse generator, damped oscillation wave producer, voltage failure simulator, conducted immunity couple uncoupling
Any one of network and artificial mains network or any combination.
10. being used for the test macro of electromagnetic compatibility test as claimed in claim 9, which is characterized in that the interface module is logical
It crosses any one of USB interface, RS485 and Ethernet and transmits the switching command.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820547158.4U CN208443929U (en) | 2018-04-17 | 2018-04-17 | Test macro for electromagnetic compatibility test |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820547158.4U CN208443929U (en) | 2018-04-17 | 2018-04-17 | Test macro for electromagnetic compatibility test |
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| CN208443929U true CN208443929U (en) | 2019-01-29 |
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| CN201820547158.4U Active CN208443929U (en) | 2018-04-17 | 2018-04-17 | Test macro for electromagnetic compatibility test |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110514931A (en) * | 2019-08-29 | 2019-11-29 | 北京经纬恒润科技有限公司 | The electromagnetic compatibility test system and method for equipment with vehicle-mounted ethernet feature |
| CN111239512A (en) * | 2020-01-13 | 2020-06-05 | 国网电力科学研究院武汉南瑞有限责任公司 | Electromagnetic compatibility test system suitable for power equipment |
| CN111781457A (en) * | 2020-07-24 | 2020-10-16 | 上海擎度汽车科技有限公司 | Test system and method for EMC conduction emission of electronic product |
| CN111897314A (en) * | 2020-08-31 | 2020-11-06 | 南方电网科学研究院有限责任公司 | Electromagnetic compatibility immunity testing device for controlling protection equipment |
| KR20210130349A (en) * | 2020-04-22 | 2021-11-01 | 주식회사 와이제이테크놀로지 | Integrated automatizing and monitoring apparatus for EMC test |
| CN113595380A (en) * | 2021-08-30 | 2021-11-02 | 京东方科技集团股份有限公司 | EMC debugging filter board card of electronic equipment and debugging method |
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2018
- 2018-04-17 CN CN201820547158.4U patent/CN208443929U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110514931A (en) * | 2019-08-29 | 2019-11-29 | 北京经纬恒润科技有限公司 | The electromagnetic compatibility test system and method for equipment with vehicle-mounted ethernet feature |
| CN110514931B (en) * | 2019-08-29 | 2021-08-24 | 北京经纬恒润科技股份有限公司 | Electromagnetic compatibility test system and method for equipment with vehicle-mounted Ethernet function |
| CN111239512A (en) * | 2020-01-13 | 2020-06-05 | 国网电力科学研究院武汉南瑞有限责任公司 | Electromagnetic compatibility test system suitable for power equipment |
| KR20210130349A (en) * | 2020-04-22 | 2021-11-01 | 주식회사 와이제이테크놀로지 | Integrated automatizing and monitoring apparatus for EMC test |
| KR102359560B1 (en) * | 2020-04-22 | 2022-02-08 | 주식회사 와이제이테크놀로지 | Integrated automatizing and monitoring apparatus for EMC test |
| CN111781457A (en) * | 2020-07-24 | 2020-10-16 | 上海擎度汽车科技有限公司 | Test system and method for EMC conduction emission of electronic product |
| CN111897314A (en) * | 2020-08-31 | 2020-11-06 | 南方电网科学研究院有限责任公司 | Electromagnetic compatibility immunity testing device for controlling protection equipment |
| CN113595380A (en) * | 2021-08-30 | 2021-11-02 | 京东方科技集团股份有限公司 | EMC debugging filter board card of electronic equipment and debugging method |
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