Electromagnetic compatibility test tool and system

Abstract

The utility model discloses an electromagnetic compatibility test tool and system. The electromagnetic compatibility test tool comprises a shell. The input end is arranged on the shell; the output end is arranged on the shell; the capacitor bank is arranged in the shell, the capacitor bank comprises a plurality of capacitors, and the capacitance values of the plurality of capacitors in the capacitor bank are different; and the switch group is arranged in the shell, and the input end, the output end and one capacitor in the capacitor group are selectively switched on by the switch group. According to the embodiment of the invention, the test efficiency can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of electromagnetic compatibility testing, and in particular to an electromagnetic compatibility testing tool and system. Background Art

[0002] The direct capacitive coupling method for electrical transient interference testing is an electromagnetic compatibility test for signal lines other than power lines, which is widely used in the automotive electronics industry. This test directly connects the capacitor to the signal line of the sample under test and couples the external electrical transient interference into the sample under test.

[0003] In the current electrical transient interference direct capacitive coupling method test, different test modules are replaced to meet different test parameter requirements, which affects the test efficiency. Utility Model Content

[0004] The embodiments of the present application provide an electromagnetic compatibility testing tool and system, which are beneficial to improving testing efficiency.

[0005] In a first aspect, an embodiment of the present application provides an electromagnetic compatibility testing tool, comprising: a shell; an input end, arranged in the shell; an output end, arranged in the shell; a capacitor group, arranged in the shell, the capacitor group includes multiple capacitors, and the capacitance values ​​of the multiple capacitors in the capacitor group are different; a switch group, arranged in the shell, the switch group can selectively connect the input end, the output end and at least one capacitor in the capacitor group.

[0006] In a possible implementation of the first aspect, the electromagnetic compatibility test tool further includes:

[0007] The capacitor interface is arranged in the housing, and at least one capacitor of the capacitor group is plugged into the capacitor interface.

[0008] In a possible implementation of the first aspect, the switch group includes a first switch and a second switch;

[0009] One end of the first switch is connected to the input end, and the other end of the first switch is selectively connected to one end of at least one capacitor in the capacitor group;

[0010] One end of the second switch is connected to the output end, and the other end of the second switch can be selectively connected to the other end of at least one capacitor in the capacitor group.

[0011] In a possible implementation of the first aspect, the n output terminals, the n capacitor groups, and the n switch groups correspond one to one, n≥2, and n is an integer.

[0012] In a possible implementation manner of the first aspect, the input end includes:

[0013] Positive input terminal, connected to the positive pole of the pulse transmitter;

[0014] The coaxial line input terminal is connected to the coaxial line output terminal of the pulse transmitter.

[0015] In a possible implementation of the first aspect, the housing is a conductive housing, and the electromagnetic compatibility test tool further includes:

[0016] A ground terminal, disposed on the housing and connected to the housing;

[0017] And / or, the negative input terminal is arranged on and connected to the shell, and the negative input terminal is connected to the negative pole of the pulse transmitter.

[0018] In a possible implementation manner of the first aspect, the capacitor group and the switch group are arranged on the same panel of the housing.

[0019] In a possible implementation manner of the first aspect, the input end and the output end are arranged on different panels of the shell.

[0020] Based on the same technical concept, in a second aspect, the embodiment of the present application further provides an electromagnetic compatibility testing system, including:

[0021] Pulse generator;

[0022] And the electromagnetic compatibility test tool as described in any embodiment of the first aspect;

[0023] Wherein, the pulse generator is connected to the input end of the electromagnetic compatibility test fixture.

[0024] In a possible implementation of the second aspect, the pulse generator is connected to an input terminal of an electromagnetic compatibility test fixture via a first wire;

[0025] The output end of the electromagnetic compatibility test tool is connected to the wiring harness to be tested through a second wire;

[0026] The grounding terminal of the electromagnetic compatibility test tool is connected to the grounding point of the grounding plane through a third wire;

[0027] The ground terminal of the pulse generator is connected to the ground point of the ground plane through a fourth conductor.

[0028] According to the electromagnetic compatibility test tooling and system provided in the embodiments of the present application, since the capacitor group includes multiple capacitors with different capacitance values, and the switch group can selectively connect at least one of the capacitors, capacitors with different capacitance values ​​can be connected to the test network by adjusting the gear position of the switch group, thereby realizing flexible switching of capacitors with different parameters, which is beneficial to simplifying the test system, optimizing the occupancy of experimental resources, and achieving the purpose of efficient testing.

[0029] In other words, the electromagnetic compatibility test tooling provided in the embodiment of the present application has a simple structure and can be flexibly adjusted and selected according to different experimental parameter requirements. It has wide applicability, reduces the complexity of the test system while being compatible with different parameter requirements, and is more convenient for test operations and rational use and management of experimental resources, thereby improving the efficiency of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Other features, objects and advantages of the present application will become more apparent by reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings, in which the same or similar reference numerals represent the same or similar features and the accompanying drawings are not drawn to scale.

[0031] Figure 1 A schematic diagram of a three-dimensional structure from one perspective of an electromagnetic compatibility test tooling provided in an embodiment of the present application is shown;

[0032] Figure 2 A schematic diagram of a three-dimensional structure from another perspective of the electromagnetic compatibility test tooling provided in an embodiment of the present application is shown;

[0033] Figure 3 A connection diagram of an electromagnetic compatibility test tool provided in an embodiment of the present application is shown;

[0034] Figure 4 A schematic diagram of a panel of a housing in an electromagnetic compatibility testing tool provided in an embodiment of the present application is shown;

[0035] Figure 5 A schematic diagram showing another panel of the housing in the electromagnetic compatibility testing tool provided in an embodiment of the present application;

[0036] Figure 6 Another panel schematic diagram of the housing in the electromagnetic compatibility testing tool provided in an embodiment of the present application is shown;

[0037] Figure 7 Another panel schematic diagram of the housing in the electromagnetic compatibility testing tool provided in an embodiment of the present application is shown;

[0038] Figure 8 A schematic diagram of a connection structure of an electromagnetic compatibility testing system provided in an embodiment of the present application is shown.

[0039] Description of reference numerals:

[0040] 10. Electromagnetic compatibility test tooling;

[0041] IN, input terminal; OUT, output terminal;

[0042] 1. Shell; cb, capacitor group; 2. capacitor interface; 3. switch group; 31. first switch; 32. second switch;

[0043] 4. Positive input terminal; 5. Coaxial line input terminal;

[0044] 6. Negative input terminal;

[0045] 7. Ground terminal;

[0046] 8. a first output terminal; 9. a second output terminal;

[0047] 20. Pulse generator;

[0048] 30. Ground plane; 12. Ground point;

[0049] 10a, a first conductive wire; 10b, a second conductive wire; 10c, a third conductive wire; 10d, a fourth conductive wire. DETAILED DESCRIPTION

[0050] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain the present application and are not configured to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating the examples of the present application.

[0051] It should be noted that, in this document, relational terms such as first and second, etc. are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

[0052] It should be noted that, when an element is described as being “connected” or “electrically connected” to another element, it may be directly connected to the other element, or one or more intervening elements may exist therebetween.

[0053] It is obvious to those skilled in the art that various modifications and changes can be made in the present application without departing from the spirit or scope of the present application. Therefore, the present application is intended to cover modifications and changes of the present application that fall within the scope of the corresponding claims (technical solutions for protection) and their equivalents. It should be noted that the implementation methods provided in the embodiments of the present application can be combined with each other without contradiction.

[0054] Before describing the technical solutions provided by the embodiments of the present application, in order to facilitate the understanding of the embodiments of the present application, the present application first specifically describes the problems existing in the related art:

[0055] In the current electrical transient interference direct capacitive coupling method test, different test modules are replaced to meet different test parameter requirements. However, in actual testing, different parameters require different modules to be replaced. In order to meet the parameter requirements in different standards, many different modules need to be prepared and replaced during the test. This will have a certain negative impact on the efficiency of the test.

[0056] In addition, since different modules cannot be shared, there are certain inconveniences in the management and occupation of experimental resources.

[0057] Although the purpose of the test can be achieved by simply connecting a capacitor between the pulse generator output and the wiring harness under test, its reliability and stability are low, and it cannot be repeatedly used to reduce experimental costs and improve experimental efficiency.

[0058] In order to solve at least one of the above technical problems, an embodiment of the present application provides an electromagnetic compatibility test tool and system. The various embodiments of the electromagnetic compatibility test tool and system will be described below in conjunction with the accompanying drawings.

[0059] like Figures 1 to 3 As shown, the electromagnetic compatibility test tool 10 provided in the embodiment of the present application includes a housing 1, at least one input terminal IN, at least one output terminal OUT, at least one capacitor group cb, and at least one switch group 3.

[0060] The input terminal IN, the output terminal OUT, at least one capacitor group cb, and at least one switch group 3 are all arranged in the housing 1. The capacitor group cb and the switch group 3 are arranged in the housing 1.

[0061] Each capacitor group cb may include multiple capacitors, and the capacitance values ​​of the multiple capacitors in the same capacitor group cb are different. For example, at least one capacitor group includes three capacitors, and the capacitance values ​​of the three capacitors are all different.

[0062] Figure 3 Two capacitor groups cb are shown, each capacitor group cb includes three capacitors, wherein the first capacitor group includes capacitor C1, capacitor C2 and capacitor C3, and the second capacitor group includes capacitor C4, capacitor C5 and capacitor C6. It should be noted that, Figure 3 The number of capacitor groups and the number of capacitors in the capacitor groups shown are merely examples and are not intended to limit the present application.

[0063] The switch group 3 can selectively connect the input terminal IN, the output terminal OUT and at least one capacitor in the capacitor group cb.

[0064] It can be understood that the switch group 3 is connected to the input terminal IN and the output terminal OUT, and can be selectively connected to at least one capacitor in the capacitor group.

[0065] For example, the switch group 3 connects the input terminal IN, the output terminal OUT, and can selectively connect the capacitor C1 in the capacitor group, that is, when the switch group 3 can selectively connect the capacitor C1, the input terminal IN, the capacitor C1 and the output terminal OUT form a path.

[0066] For another example, the switch group 3 connects the input terminal IN, the output terminal OUT, and can selectively connect the capacitor C2 in the capacitor group, that is, when the switch group 3 can selectively connect the capacitor C2, the input terminal IN, the capacitor C2 and the output terminal OUT form a path.

[0067] Exemplarily, the input terminal IN can be connected to a pulse generator that generates electrical transient interference, and the output terminal OUT can be connected to the wiring harness under test, so that the signal output by the pulse generator can be coupled to the wiring harness under test through the input terminal IN, a capacitor in the capacitor group, and the output terminal OUT.

[0068] In the embodiment of the present application, since the capacitor group includes multiple capacitors with different capacitance values, and the switch group can selectively connect at least one of the capacitors, capacitors with different capacitance values ​​can be connected to the test network by adjusting the gear position of the switch group, thereby realizing flexible switching of capacitors with different parameters, which is beneficial to simplifying the test system, optimizing the occupancy of experimental resources, and achieving the purpose of efficient testing.

[0069] In other words, the electromagnetic compatibility test tooling provided in the embodiment of the present application has a simple structure and can be flexibly adjusted and selected according to different experimental parameter requirements. It has wide applicability, reduces the complexity of the test system while being compatible with different parameter requirements, and is more convenient for test operations and rational use and management of experimental resources, thereby improving the efficiency of the test.

[0070] For example, at least one capacitor group may include three capacitors, and the capacitance values ​​of the three capacitors may be 0.1uF, 220pF, and 100pF, respectively. Of course, the capacitance value of each capacitor may also be set according to actual needs.

[0071] For example, the capacitance values ​​of capacitors in different capacitor groups may be the same. Figure 3 As shown, the capacitance value of capacitor C1 in the first capacitor group is the same as the capacitance value of capacitor C4 in the second capacitor group, and / or, the capacitance value of capacitor C2 in the first capacitor group is the same as the capacitance value of capacitor C5 in the second capacitor group, and / or, the capacitance value of capacitor C3 in the first capacitor group is the same as the capacitance value of capacitor C6 in the second capacitor group.

[0072] In some embodiments, Figure 1 and Figure 3As shown, the electromagnetic compatibility test tool may further include a capacitor interface 2, which is arranged in the housing 1. At least one capacitor in the capacitor group cb is plugged into the capacitor interface 2.

[0073] In the embodiment of the present application, by providing a capacitor interface, flexible replacement of the capacitor after it is damaged can be achieved.

[0074] Exemplarily, the capacitor may be a plug-in capacitor, and two pins of the capacitor may be respectively plugged into connection ports of a switch in the switch group through the capacitor interface 2 .

[0075] Exemplarily, each capacitor in each capacitor group cb can be plugged into the capacitor interface 2. It is understandable that there is no connection relationship between the pins of different capacitors.

[0076] In some embodiments, Figure 3 As shown, the switch group 3 includes a first switch 31 and a second switch 32. One end of the first switch 31 is connected to the input terminal IN, and the other end of the first switch 31 can be selectively connected to one end of at least one capacitor in the capacitor group cb. One end of the second switch 32 is connected to the output terminal OUT, and the other end of the second switch 32 can be selectively connected to the other end of at least one capacitor in the capacitor group cb.

[0077] In the embodiment of the present application, by setting the first switch 31, the connection between the capacitor and the input end can be achieved, and by setting the second switch 32, the connection between the capacitor and the output end can be achieved.

[0078] It is understandable that during the test, the first switch 31 and the second switch 32 are connected to the same capacitor. For example, the first switch 31 is connected to one end of the capacitor C1, and the second switch 32 is connected to the other end of the capacitor C1.

[0079] The first switch 31 and the second switch 32 both have different gears. Selecting different gears can enable the first switch 31 and the second switch 32 to be connected to different capacitors.

[0080] For example, Figure 3 As shown, the first switch group 3 corresponds to the first capacitor group cb, and the first capacitor group cb includes capacitors C1, C2, and C3. When the first gear is selected, the first switch 31 and the second switch 32 are connected to the capacitor C1; when the second gear is selected, the first switch 31 and the second switch 32 are connected to the capacitor C2; when the third gear is selected, the first switch 31 and the second switch 32 are connected to the capacitor C3. Figure 3 The second switch group 3 corresponding to the second capacitor group cb is similar, and will not be described one by one here.

[0081] In some embodiments, the number of output terminals OUT, the number of capacitor groups cb and the number of switch groups 3 are all n, and the n output terminals, n capacitor groups and n switch groups correspond one to one, wherein n≥2 and n is an integer.

[0082] The n output terminals can be connected to the n wiring harnesses to be tested one by one, so that the n wiring harnesses to be tested can be tested at the same time, which is more conducive to improving efficiency.

[0083] N switch groups may also be arranged between the n capacitor groups and the input terminal IN, and the n capacitor groups are connected to the input terminal IN through the n switch groups respectively.

[0084] Figure 3 For example, take n=2 as an example. Figure 3 As shown, the output terminal OUT may include a first output terminal 8 and a second output terminal 9 , the first output terminal 8 is connected to the first switch group 3 , and the second output terminal 9 is connected to the second switch group 3 .

[0085] Exemplarily, the input terminal IN can be shared by n capacitor groups. For example, the second switches 32 in different switch groups 3 can be connected to the same input terminal IN, so that the same signal connected to the input terminal IN can be used to test different tested wiring harnesses at the same time.

[0086] It can be understood that different tested wiring harnesses are connected to different output terminals and then connected to capacitors in different capacitor groups through different switch groups.

[0087] For example, when testing n tested wiring harnesses at the same time, the parameters of the capacitors selected for different tested wiring harnesses may be different according to the test requirements. Figure 3 As shown, by setting the gear position of the switch group, the first measured wiring harness can be connected to the capacitor C1, and the second measured wiring harness can be connected to the capacitor C5. The capacitance values ​​of the capacitor C1 and the capacitor C5 can be different.

[0088] In some embodiments, Figure 1 and Figure 3 As shown, the input terminal IN may include a positive input terminal 4 and a coaxial line input terminal 5. The positive input terminal 4 is connected to the positive pole of the pulse transmitter; the coaxial line input terminal 5 is connected to the coaxial line output terminal of the pulse transmitter.

[0089] The positive input terminal 4 is connected to the coaxial line input terminal 5 , and the signals input to the positive input terminal 4 and the coaxial line input terminal 5 may be the same.

[0090] In the embodiment of the present application, two input terminals are provided, that is, the input terminals are designed to be redundant, so that a wide range of applications among different pulse generators can be achieved.

[0091] Exemplarily, a plurality of switch groups 3 are connected to both the positive input terminal 4 and the coaxial line input terminal 5 , so that different capacitor groups cb can share the positive input terminal 4 and the coaxial line input terminal 5 .

[0092] Exemplarily, the coaxial line of the pulse transmitter may include a fiber core and a shielding layer, wherein the fiber core may be connected to the coaxial line input end 5 , and the shielding layer may be connected to the housing 1 , which may be a metal housing.

[0093] In some embodiments, the housing 1 is a conductive housing, for example, the housing 1 is a metal housing, so that the housing 1 can provide shielding for the electromagnetic compatibility test tooling.

[0094] like Figures 1 to 3 As shown, the electromagnetic compatibility testing tool 10 may further include a ground terminal 7 and / or a negative input terminal 6 .

[0095] The ground terminal 7 is disposed on the housing 1 and connected to the housing 1. The ground terminal 7 can be connected to a ground point, thereby achieving a shielding function of the housing 1.

[0096] The negative input terminal 6 is disposed on the housing 1 and connected to the housing 1 , and the negative input terminal 6 is connected to the negative pole of the pulse transmitter.

[0097] It is understandable that when a ground terminal 7 and a negative input terminal 6 are provided and both are connected to the shell 1, the grounding point is connected through the ground terminal 7, and a common ground connection can be provided for the shell 1 of the electromagnetic compatibility test tooling and the negative pole of the pulse generator through the ground terminal 7 at the same time.

[0098] In some embodiments, Figure 1 and Figure 2 As shown, the housing 1 of the electromagnetic compatibility test tool can be composed of multiple panels, for example, the housing 1 is composed of an upper panel, a lower panel, a front panel, a rear panel, a left panel and a right panel. The capacitor group cb and the switch group 3 are arranged on the same panel of the housing 1.

[0099] As described in the above embodiment, the capacitors in the capacitor group cb can be plugged into the capacitor interface 2 , and the capacitor interface 2 and the switch group 3 are arranged on the same panel of the housing 1 .

[0100] In the embodiment of the present application, the capacitor group cb and the switch group 3 are arranged on the same panel of the housing 1, which can facilitate the connection between the capacitor group cb and the switch group 3.

[0101] For example, Figure 4 Schematic diagram of the arrangement of the upper panel of the housing 1 . The capacitor group CB and the switch group 3 can be arranged on the upper panel of the housing 1 , that is, the capacitor interface 2 and the switch group 3 can be arranged on the upper panel of the housing 1 .

[0102] When the electromagnetic compatibility test tool is placed, the upper panel of the housing 1 is placed upwards, and the upper panel of the housing 1 is provided with a capacitor group CB, so that the capacitors in the capacitor group CB can be easily replaced.

[0103] In some embodiments, Figure 1 and Figure 2 As shown, the input terminal IN and the output terminal OUT can be arranged on different panels of the housing 1 .

[0104] Since the input terminal IN and the output terminal OUT need to be connected to different objects, for example, the input terminal IN is connected to a pulse generator and the output terminal OUT is connected to the wiring harness under test, in the embodiment of the present application, the two are arranged on different panels, which can facilitate the connection of the input terminal IN and the output terminal OUT with different objects.

[0105] For example, Figure 5 Schematic diagram of the arrangement of the front panel of the housing 1 . The input terminal IN includes a positive input terminal 4 and a coaxial line input terminal 5 . The positive input terminal 4 and the coaxial line input terminal 5 can be arranged on the front panel of the housing 1 .

[0106] Exemplarily, the negative input terminal 6 may also be disposed on the front panel of the housing 1 .

[0107] Figure 6 Schematic diagram of the arrangement of the rear panel of the housing 1 . The output terminal OUT includes a first output terminal 8 and a second output terminal 9 . The first output terminal 8 and the second output terminal 9 can be arranged on the rear panel of the housing 1 .

[0108] For example, Figure 7 It is a schematic diagram of the arrangement of the left panel of the housing 1 , and the grounding terminal 7 can be arranged on the left panel of the housing 1 .

[0109] Based on the same technical concept, the present application also provides an electromagnetic compatibility test system. Figure 8 As shown, the electromagnetic compatibility test system includes a pulse generator 20 and an electromagnetic compatibility test fixture 10. The pulse generator 20 is connected to the input end of the electromagnetic compatibility test fixture 10. The electromagnetic compatibility test fixture 10 may include any of the electromagnetic compatibility test fixtures described in the above embodiments.

[0110] In the embodiment of the present application, since the capacitor group includes multiple capacitors with different capacitance values, and the switch group can selectively connect one of the capacitors, the capacitors with different capacitance values ​​can be connected to the test network by adjusting the gear position of the switch group, thereby realizing flexible switching of capacitors with different parameters, which is beneficial to simplifying the test system, optimizing the occupancy of experimental resources, and achieving the purpose of efficient testing.

[0111] The pulse generator 20 can generate a signal of electrical transient interference. It is understandable that the electromagnetic compatibility test system provided in the embodiment of the present application can be used for electrical transient interference direct capacitive coupling method test (DCC test for short).

[0112] In some embodiments, Figure 8 As shown, the pulse generator 20 can be connected to the input terminal IN of the electromagnetic compatibility test fixture 10 through the first wire 10a. For example, the pulse generator 20 can be connected to one of the positive input terminal 4, the coaxial input terminal 5 and the negative input terminal 6 of the electromagnetic compatibility test fixture 10 through the first wire 10a.

[0113] The output terminal OUT of the electromagnetic compatibility test tool 10 is connected to the wiring harness 11 to be tested through the second wire 10b. For example, the first output terminal 8 or the second output terminal 9 of the electromagnetic compatibility test tool 10 is connected to the wiring harness 11 to be tested through the second wire 10b.

[0114] The ground terminal 7 of the electromagnetic compatibility testing tool 10 is connected to the ground point 12 of the ground plane 30 through the third wire 10c.

[0115] The ground terminal of the pulse generator 20 is connected to the ground point 12 of the ground plane 30 via a fourth conductor 10 d.

[0116] The ground plane 30 may be a metal ground plane.

[0117] The transient interference signal generated by the pulse generator 20 can be transmitted to the capacitor inside the electromagnetic compatibility test fixture 10 through the first wire 10a, and the capacitor inside the electromagnetic compatibility test fixture 10 can inject the transient interference signal into the tested wiring harness 11 through the second wire 10b to realize the test of the wiring harness 11.

[0118] According to the embodiments described above in the present application, these embodiments do not describe all the details in detail, nor do they limit the present application to the specific embodiments described. Obviously, many modifications and changes can be made based on the above description. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present application, so that those skilled in the art can make good use of the present application and the modifications based on the present application. The present application is limited only by the claims and their full scope and equivalents.

Claims

1. An electromagnetic compatibility test tool, characterized in that: include: case; An input end, arranged on the housing; An output end, arranged on the housing; A capacitor group is arranged in the housing, the capacitor group includes a plurality of capacitors, and the capacitance values ​​of the plurality of capacitors in the capacitor group are different; A switch group is arranged in the housing, and the switch group can selectively connect the input end, the output end and at least one capacitor in the capacitor group.

2. The electromagnetic compatibility test tool according to claim 1, characterized in that: The electromagnetic compatibility test tool also includes: A capacitor interface is arranged in the housing, and at least one capacitor of the capacitor group is plugged into the capacitor interface.

3. The electromagnetic compatibility test tool according to claim 1, characterized in that: The switch group includes a first switch and a second switch; One end of the first switch is connected to the input end, and the other end of the first switch is selectively connected to one end of at least one capacitor in the capacitor group; One end of the second switch is connected to the output end, and the other end of the second switch can be selectively connected to the other end of at least one capacitor in the capacitor group.

4. The electromagnetic compatibility test tool according to claim 1, characterized in that: The n output terminals, the n capacitor groups and the n switch groups correspond one to one, n≥2, and n is an integer.

5. The electromagnetic compatibility test tool according to claim 1, characterized in that: The input terminal comprises: Positive input terminal, connected to the positive pole of the pulse transmitter; The coaxial line input end is connected to the coaxial line output end of the pulse transmitter.

6. The electromagnetic compatibility test tool according to claim 1, characterized in that: The housing is a conductive housing, and the electromagnetic compatibility test tool further includes: A ground terminal, disposed on the housing and connected to the housing; And / or, a negative input terminal is arranged on and connected to the shell, and the negative input terminal is connected to the negative pole of the pulse transmitter.

7. The electromagnetic compatibility test tool according to claim 1, characterized in that: The capacitor group and the switch group are arranged on the same panel of the housing.

8. The electromagnetic compatibility test tool according to claim 1, characterized in that: The input end and the output end are arranged on different panels of the housing.

9. An electromagnetic compatibility test system, characterized in that: include: Pulse generator; And the electromagnetic compatibility test tool as described in any one of claims 1 to 8; Wherein, the pulse generator is connected to the input end of the electromagnetic compatibility testing tooling.

10. The electromagnetic compatibility test system according to claim 9, characterized in that: The pulse generator is connected to the input end of the electromagnetic compatibility test fixture through a first wire; The output end of the electromagnetic compatibility test tool is connected to the wiring harness to be tested through a second wire; The grounding terminal of the electromagnetic compatibility test tool is connected to the grounding point of the grounding plane through a third wire; The ground terminal of the pulse generator is connected to the ground point of the ground plane through a fourth wire.

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