Vehicle electromagnetic compatibility radiation anti-interference test method and device, vehicle and medium

Abstract

The invention provides a vehicle electromagnetic compatibility radiation anti-interference test method and device, a vehicle and a medium, and relates to the field of vehicle testing, and the method comprises the steps: shielding a wire harness between a first domain controller and a second domain controller, and obtaining a wire harness shielding result; the shielding layer located at the first domain controller end or the shielding layer located at the second domain controller end is grounded, the shielding layer at the other domain controller end is suspended, and capacitive coupling is formed between the shielding layer and the ground plane; and carrying out electromagnetic compatibility radiation anti-interference test on the vehicle according to a wire harness shielding result and capacitive coupling. According to the invention, the wire harness between the first domain controller and the second domain controller is fully shielded, so that a high-frequency interference coupling path can be blocked; and the shielding layer of the first domain controller end or the second domain controller end is grounded, and then the shielding layer of the other domain controller end is suspended to form single-end grounding, so that high-frequency interference can be prevented from entering a communication link through wiring harness coupling.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle testing, and in particular, to a method and device for testing vehicle electromagnetic compatibility radiation immunity, a vehicle, and a medium. Background Art

[0002] During the EMC (Electromagnetic Compatibility) radiation immunity test of a vehicle, the Ethernet communication link between VIUs (Vehicle Intranet Units) will be affected by electromagnetic interference (EMI), resulting in E2E (End-to-End) check failures and Ethernet signal packet loss. The main reasons for the above results may be: (1) The Ethernet cable harness between domain controllers is not fully shielded or the grounding method is improper. For example, double-end grounding forms a grounding loop, causing high-frequency interference to couple into the communication link through the cable harness; (2) The cable harness length exceeds the vehicle's EMC design requirements, resulting in inconsistent component-level test and vehicle-level test standards (for example, the component cable harness length is greater than the vehicle cable harness length), thus causing impedance mismatch and amplifying the interference of common-mode noise on differential signals.

[0003] In addition, during the EMC radiation immunity test of a vehicle, due to the inconsistent requirements for the component cable harness length and the vehicle cable harness length (for example, the component cable harness length is greater than the vehicle cable harness length), after Ethernet signal packet loss occurs, it will cause the component test to pass while the vehicle test fails, resulting in the domain controller being interfered during the vehicle immunity test. Summary of the Invention

[0004] The present application provides a method and device for testing vehicle electromagnetic compatibility radiation immunity, a vehicle, and a medium to solve the technical problems existing in the EMC radiation immunity test of a vehicle.

[0005] A method for testing vehicle electromagnetic compatibility radiation immunity provided by the present application includes the following steps: Shield the cable harness between the first domain controller and the second domain controller to obtain a cable harness shielding result; Ground the shielding layer at the first domain controller end and float the shielding layer at the second domain controller end; or ground the shielding layer at the second domain controller end and float the shielding layer at the first domain controller end to form a capacitive coupling between the shielding layer and the ground plane; wherein, the shielding layer is formed based on the cable harness shielding result; Perform an electromagnetic compatibility radiated immunity test on the vehicle according to the harness shielding result and the capacitive coupling; wherein, the vehicle includes the first domain controller and the second domain controller.

[0006] In an embodiment of the present application, the process of shielding the harness between the first domain controller and the second domain controller includes: Shield the outer layer of the harness between the first domain controller and the second domain controller by combining aluminum foil and braided copper mesh; and / or, Shield the inner layer of the harness between the first domain controller and the second domain controller by individually wrapping the twisted pair with aluminum foil.

[0007] In an embodiment of the present application, after forming a capacitive coupling between the shielding layer and the ground plane, the method further includes: Regard the distributed capacitance between the shielding layer and the internal harness as the distributed capacitance between the interference source and the signal line, and denote it as the parasitic capacitance; wherein, the interference source is used to apply a noise voltage; Based on the parasitic capacitance, the noise voltage applied by the interference source, and the phase difference between the noise voltage and the noise current, calculate the high-frequency noise current coupled into the signal line by the parasitic capacitance; Control the high-frequency noise current to flow on the surface of the shielding layer, and calculate the skin depth according to the magnetic permeability of the shielding layer material, the conductivity of the shielding layer material, and the preset angular frequency; Adjust the shielding layer material according to the skin depth.

[0008] In an embodiment of the present application, the method further includes: Denote the domain controller end to be suspended as the suspended end, and calculate the capacitance of the exposed harness at the suspended end; Adjust the parallel segment length of the conductor in the exposed harness at the suspended end and the width of the conductor in the exposed harness at the suspended end to reduce the capacitance of the exposed harness at the suspended end; including: reducing the parallel segment length of the conductor in the exposed harness at the suspended end, and reducing the width of the conductor in the exposed harness at the suspended end; or, under the condition that the exposed harness at the suspended end is cylindrical, reducing the parallel segment length of the conductor in the exposed harness at the suspended end, or increasing the spacing distance between the suspended harness and the ground plane.

[0009] In an embodiment of the present application, the method further includes: Block the common-mode current between the first domain controller and the second domain controller through the common-mode impedance, and the common-mode impedance is obtained by a common-mode yoke coil arranged between the first domain controller and the second domain controller; and / or, Adjust the common-mode impedance according to the length of the harness between the first domain controller and the second domain controller, and optimize the signal transmission matching degree according to the adjusted result of the common-mode impedance; and / or, Detect the common-mode noise voltage, generate an inverted waveform injection grounding path based on the common-mode noise voltage, and perform noise cancellation through the inverted waveform injection grounding path.

[0010] In an embodiment of the present application, the method further includes: Add a termination resistor at the Ethernet physical chip end between the first domain controller and the second domain controller; and / or, Enhance the high-frequency components through the Ethernet physical chip between the first domain controller and the second domain controller, and use the high-frequency components for harness attenuation compensation; and / or, Set resonance points for preset interference frequency points through a pre-integrated or real-time integrated filter circuit.

[0011] In an embodiment of the present application, the method further includes: adding a timestamp and a serial number during the electromagnetic compatibility radiation immunity test of the vehicle, and distinguishing occasional Ethernet signal packet loss through the timestamp and the serial number, or distinguishing continuous interference through the timestamp and the serial number.

[0012] The present application also provides a vehicle electromagnetic compatibility radiation immunity test device, and the device includes: A harness shielding module for shielding the harness between the first domain controller and the second domain controller to obtain a harness shielding result; A capacitive coupling module for grounding the shielding layer at the first domain controller end and floating the shielding layer at the second domain controller end; or, grounding the shielding layer at the second domain controller end and floating the shielding layer at the first domain controller end to form capacitive coupling between the shielding layer and the ground plane; wherein, the shielding layer is formed based on the harness shielding result; A test module for performing an electromagnetic compatibility radiation immunity test on the vehicle according to the harness shielding result and the capacitive coupling; wherein, the vehicle includes the first domain controller and the second domain controller.

[0013] The present application also provides a vehicle, and the vehicle is applied to the vehicle electromagnetic compatibility radiation immunity test device as described above, or the vehicle is applied to the vehicle electromagnetic compatibility radiation immunity test method as described in any one of the above.

[0014] The present application also provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the vehicle electromagnetic compatibility radiation immunity test method as described in any one of the above are implemented.

[0015] Advantages of the present application: The present application provides a method and device for testing the electromagnetic compatibility radiation immunity of a vehicle, a vehicle, and a medium. By shielding the wire harness between the first domain controller and the second domain controller, a wire harness shielding result is obtained; the shielding layer at the first domain controller end is grounded, and the shielding layer at the second domain controller end is floated; alternatively, the shielding layer at the second domain controller end is grounded, and the shielding layer at the first domain controller end is floated to form a capacitive coupling between the shielding layer and the ground plane; wherein, the shielding layer is formed based on the wire harness shielding result; according to the wire harness shielding result and the capacitive coupling, the electromagnetic compatibility radiation immunity test of the vehicle is carried out; wherein, the vehicle includes a first domain controller and a second domain controller. It can be seen from this that the present application can block the high-frequency interference coupling path by fully shielding the wire harness between the first domain controller and the second domain controller; at the same time, by grounding the shielding layer at the first domain controller end or the second domain controller end, and then floating the shielding layer at the other domain controller end to form single-ended grounding, the grounding loop can be avoided, ensuring that the shielding layer effectively discharges the interference current, thereby preventing high-frequency interference from coupling into the communication link through the wire harness. Description of the Drawings

[0016] The drawings here are incorporated into the specification and form a part of this specification, showing the embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0017] In the drawings: Figure 1 It is a schematic flowchart of the method for testing the electromagnetic compatibility radiation immunity of a vehicle provided in an embodiment of the present application; Figure 2 It is a schematic hardware structure diagram of the device for testing the electromagnetic compatibility radiation immunity of a vehicle provided in an embodiment of the present application; Figure 3 It is a schematic hardware structure diagram of a computer device suitable for implementing one or more embodiments of the present application. Detailed Embodiments

[0018] The following uses specific specific examples to illustrate the embodiments of the present application. Those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in this specification. The present application can also be implemented or applied through other different specific embodiments. The details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present application. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0019] It is understood that the illustrations provided in the following embodiments only schematically illustrate the basic concept of the present application. Only the components related to the present application are shown in the drawings, rather than being drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and ratio of each component in actual implementation may be arbitrarily changed, and the component layout type may also be more complex.

[0020] In the following description, a large number of details are explored to provide a more thorough explanation of the embodiments of the present application. However, it is obvious to those skilled in the art that the embodiments of the present application can be implemented without these specific details. In other embodiments, well-known structures and devices are shown in the form of block diagrams rather than in detail to avoid making the embodiments of the present application difficult to understand.

[0021] Figure 1 A flowchart showing a method for testing the electromagnetic compatibility radiation immunity of a vehicle is presented. Specifically, in an exemplary embodiment, as Figure 1 shown, this embodiment provides a method for testing the electromagnetic compatibility radiation immunity of a vehicle, including the following steps: S110, shield the wire harness between the first domain controller and the second domain controller to obtain a wire harness shielding result. As some examples, the wire harness between the first domain controller and the second domain controller can be an Ethernet wire harness. As some examples, the wire harness shielding result includes but is not limited to the outer layer shielding result of the wire harness between the first domain controller and the second domain controller, and the inner layer shielding result of the wire harness between the first domain controller and the second domain controller.

[0022] S120, ground the shielding layer at the first domain controller end and float the shielding layer at the second domain controller end; or, ground the shielding layer at the second domain controller end and float the shielding layer at the first domain controller end to form a capacitive coupling between the shielding layer and the ground plane; wherein, the shielding layer is formed based on the wire harness shielding result. As some examples, the shielding layer includes but is not limited to being formed according to the outer layer shielding result of the wire harness between the first domain controller and the second domain controller, and also includes being formed according to the inner layer shielding result of the wire harness between the first domain controller and the second domain controller.

[0023] S130, perform an electromagnetic compatibility radiation immunity test on the vehicle according to the wire harness shielding result and the capacitive coupling; wherein, the vehicle includes a first domain controller and a second domain controller.

[0024] In some embodiments of the present application, the process of shielding the wire harness between the first domain controller and the second domain controller includes: shielding the outer layer of the wire harness between the first domain controller and the second domain controller by combining aluminum foil and braided copper mesh; and / or shielding the inner layer of the wire harness between the first domain controller and the second domain controller by individually wrapping the twisted pair with aluminum foil. As an example, for interference from high-frequency electric fields such as 16 - 38 MHz, the outer layer of the wire harness between the first domain controller and the second domain controller can be shielded by combining aluminum foil and braided copper mesh. At this time, the combination of aluminum foil and braided copper mesh can be used as the shielding layer. As another example, in order to cancel the crosstalk between differential signal lines, the inner layer of the wire harness between the first domain controller and the second domain controller can be shielded by individually wrapping the twisted pair with aluminum foil. At this time, the aluminum foil can be used as the shielding layer. In addition, when shielding the wire harness between the first domain controller and the second domain controller, the shielding effectiveness can also be calculated as: SE = R + X + B, where SE represents the shielding effectiveness; R represents the reflection loss, which is related to the surface impedance of the shielding layer material and the frequency; X represents the absorption loss, which is related to the thickness of the shielding layer and the frequency; B represents the multiple reflection correction loss. By calculating the shielding effectiveness, the ability of the shielding layer material to suppress electromagnetic interference can be quantified, so as to select a suitable shielding layer material when shielding the wire harness between the first domain controller and the second domain controller. Among them, the shielding layer materials include but are not limited to aluminum foil, braided copper mesh, etc. It can be seen that by performing outer layer shielding and inner layer shielding on the wire harness between the first domain controller and the second domain controller, the wire harness between the first domain controller and the second domain controller can be fully shielded, thereby reconstructing the electromagnetic compatibility of the Ethernet wire harness between the first domain controller and the second domain controller, blocking the high-frequency interference coupling path, and meeting the vehicle-level EMC test requirements.

[0025] In some embodiments of the present application, due to the potential difference between different grounding points, such as the difference in grounding resistance at different parts of the vehicle body and the voltage fluctuation caused by large current loads, a closed current path will be formed in the shielding layer, which is called a grounding loop. At this time, the shielding layer at the first domain controller end can be grounded, and the shielding layer at the second domain controller end can be floated; or, the shielding layer at the second domain controller end can be grounded, and the shielding layer at the first domain controller end can be floated. At this time, a capacitive coupling is formed between the shielding layer and the ground, but there is no direct current path, thereby blocking the formation of the grounding loop. Since the shielding layer is only grounded at one end, any noise current with a frequency lower than the cut-off frequency of the shielding layer cannot form a closed loop. Among them, the cut-off frequency of the shielding layer is determined by the distributed capacitance. The distributed capacitance between the shielding layer and the internal wire harness forms a bypass for high-frequency interference, directing the noise directly to the ground. Therefore, after a capacitive coupling is formed between the shielding layer and the ground plane, this vehicle electromagnetic compatibility radiated immunity test method may further include: The distributed capacitance between the shielding layer and the internal wire harness is regarded as the distributed capacitance between the interference source and the signal line, denoted as parasitic capacitance; among them, the interference source is used to apply a noise voltage. As some examples, the interference source includes but is not limited to high-voltage wire harnesses, radio frequency radiation sources, etc.

[0026] Based on the parasitic capacitance, the noise voltage applied by the interference source, and the phase difference between the noise voltage and the noise current, calculate the high-frequency noise current coupled into the signal line by the parasitic capacitance, as follows: ; in the formula, represents the high-frequency noise current coupled into the signal line by the parasitic capacitance; is the imaginary unit, indicating that there is a phase difference between the noise voltage and the noise current; represents the angular frequency, represents the parasitic capacitance, represents the noise voltage applied by the interference source. The single-ended grounded shielding layer is equivalent to an electrostatic shielding body, and the external electric field is neutralized by the charges on the surface of the shielding layer, and the internal signal line is not affected by the external electric field. When high-frequency (such as 16 MHz to 100 MHz) interference is coupled to the shielding layer through the electromagnetic field, the current quickly flows into the vehicle body ground through the single-ended grounding point, avoiding accumulation in the shielding layer.

[0027] Control the high-frequency noise current to flow on the surface of the shielding layer, and, calculate the skin depth according to the magnetic permeability of the shielding layer material, the conductivity of the shielding layer material, and the angular frequency, as follows: ; in the formula, represents the skin depth, represents the magnetic permeability of the shielding layer material, represents the conductivity of the shielding layer material. By controlling the high-frequency current to flow on the surface of the shielding layer, the penetration of the internal wire harness can be further reduced.

[0028] Adjust the shielding layer material according to the skin depth to reduce the loss through the shielding layer material adjustment result. As an example, for instance, hollow wires or flat wires can be used to replace the solid wires in the shielding layer material, which can not only reduce material waste but also reduce the loss caused by the skin effect.

[0029] In a specific embodiment, when single-ended grounded, to prevent the parasitic capacitance from introducing a new loop, at this time, the shielding layer on the side of the first domain controller can be kept insulated from the shell, thus avoiding accidentally forming a grounding loop through paths such as mounting brackets. At the same time, the parasitic capacitance of the floating end to the ground can also be controlled to be less than or equal to 10 pF to prevent the formation of a hidden grounding path at high frequencies.

[0030] In some embodiments of the present application, the vehicle electromagnetic compatibility radiation immunity test method may further include: Denote the floating domain controller end as the floating end, and calculate the capacitance of the exposed wire harness of the floating end, as follows: , in the formula, represents the capacitance of the exposed wire harness at the floating end, represents the vacuum permittivity, represents the relative permittivity of the insulating material, represents the parallel segment length of the conductor in the exposed wire harness at the floating end, represents the width of the conductor in the exposed wire harness at the floating end, represents the spacing distance between the exposed wire harness at the floating end and the ground plane.

[0031] To reduce the effective area of the conductor in the exposed wire harness at the floating end, the exposed part of the wire harness at the floating end can also be shortened, and the parallel segment length of the conductor in the exposed wire harness at the floating end and the width of the conductor in the exposed wire harness at the floating end can be adjusted to reduce the capacitance of the exposed wire harness at the floating end. As an example, the process of adjusting the parallel segment length of the conductor in the exposed wire harness at the floating end and the width of the conductor in the exposed wire harness at the floating end includes: reducing the parallel segment length of the conductor in the exposed wire harness at the floating end, and reducing the width of the conductor in the exposed wire harness at the floating end. Moreover, by reducing the parallel segment length of the conductor in the exposed wire harness at the floating end, it is equivalent to reducing the length of the component wire harness, so that the length of the finally obtained component wire harness is consistent with the length of the vehicle wire harness.

[0032] As another example, for the capacitance between the cylindrical wire harness and the ground plane, it can be obtained that: , where, represents the radius of the cylindrical wire harness. In addition, the process of adjusting the parallel segment length of the conductor in the exposed wire harness at the floating end and the width of the conductor in the exposed wire harness at the floating end can include: reducing the parallel segment length of the conductor in the exposed wire harness at the floating end. Or, increasing the spacing distance between the wire harness at the floating end and the ground plane. Moreover, by reducing the parallel segment length of the conductor in the exposed wire harness at the floating end, it is equivalent to reducing the length of the component wire harness, so that the length of the finally obtained component wire harness is consistent with the length of the vehicle wire harness.

[0033] As yet another example, for the capacitance of the parallel plate capacitor model, it can be obtained that: , represents the effective facing area between the conductor in the wire harness at the floating end and the ground plane, represents the spacing distance between the wire harness at the floating end and the ground plane. If it is required that , using polytetrafluoroethylene insulation (<![CDATA[ ]]>=2.1), the spacing distance =1mm, then the maximum allowable facing area is: .

[0034] It can be seen from this that in order to reduce the capacitance of the exposed wire harness at the floating end, the distance between the conductor and the ground can be increased, and the material distance between the floating wire harness and the nearby conductor or ground plane can be increased through structural design. The geometric shape of the wire harness can also be optimized to avoid parallel wire routing and reduce the effective coupling area. If the floating end is a shielded wire, the signal wire and the shield layer can also be ensured to be completely coaxial to eliminate the edge electric field.

[0035] In some embodiments of the present application, the vehicle electromagnetic compatibility radiation immunity test method may further include: blocking the common-mode current between the first domain controller and the second domain controller through a common-mode impedance, and the common-mode impedance is obtained through a common-mode yoke coil disposed between the first domain controller and the second domain controller. As an example, for example, common-mode choke coils CMC can be installed at both ends of the Ethernet wire harness, and the high common-mode impedance of the common-mode choke coils is used to block the common-mode current.

[0036] In some embodiments of the present application, the vehicle electromagnetic compatibility radiation immunity test method may further include: detecting the common-mode noise voltage, generating an inverted waveform based on the common-mode noise voltage and injecting it into the grounding path, and performing noise cancellation through the inverted waveform injected into the grounding path. Moreover, the common-mode impedance is adjusted according to the wire harness length between the first domain controller and the second domain controller, and the signal transmission matching degree is optimized according to the adjustment result of the common-mode impedance.

[0037] In some embodiments of the present application, the vehicle electromagnetic compatibility radiation immunity test method may further include: adding a termination resistor at the Ethernet physical chip end between the first domain controller and the second domain controller. As an example, for example, a 100Ω termination resistor can be added at the Ethernet physical PHY (Physical Layer Chip) chip end between the first domain controller and the second domain controller to reduce the radiation caused by signal reflection and perform differential signal termination matching.

[0038] In some embodiments of the present application, the vehicle electromagnetic compatibility radiation immunity test method may further include: enhancing the high-frequency components through the Ethernet physical chip between the first domain controller and the second domain controller, and compensating for the wire harness attenuation using the high-frequency components. As an example, for example, the high-frequency components can be enhanced through the pre-emphasis of the Ethernet PHY chip, and the wire harness attenuation is compensated by the equalization at the receiving end.

[0039] In some embodiments of the present application, the vehicle electromagnetic compatibility radiation immunity test method may further include: setting resonance points for preset interference frequency points through a pre-integrated or real-time integrated filter circuit. As an example, for example, a π-type filter circuit (capacitor + ferrite + capacitor) can be integrated, and LC resonance points are set for preset interference frequency points such as 16 MHz and 38 MHz.

[0040] In some embodiments of the present application, the vehicle electromagnetic compatibility radiation immunity test method may further include: adding a timestamp and a serial number during the electromagnetic compatibility radiation immunity test of the vehicle, and distinguishing occasional Ethernet signal packet loss through the timestamp and the serial number, or distinguishing continuous interference through the timestamp and the serial number. As an example, for instance, during the electromagnetic compatibility radiation immunity test of the vehicle, a timestamp and a serial number can be added on the basis of the original CRC (Cyclic Redundancy Check) check, so as to distinguish occasional Ethernet signal packet loss through the timestamp and the serial number, or distinguish continuous interference through the timestamp and the serial number.

[0041] In summary, the present application proposes a vehicle electromagnetic compatibility radiation immunity test method. By shielding the wire harness between the first domain controller and the second domain controller, a wire harness shielding result is obtained; grounding the shielding layer at the first domain controller end and floating the shielding layer at the second domain controller end; or, grounding the shielding layer at the second domain controller end and floating the shielding layer at the first domain controller end to form a capacitive coupling between the shielding layer and the ground plane; wherein, the shielding layer is formed based on the wire harness shielding result; according to the wire harness shielding result and the capacitive coupling, performing an electromagnetic compatibility radiation immunity test on the vehicle; wherein, the vehicle includes a first domain controller and a second domain controller. It can be seen that this method can block the high-frequency interference coupling path by fully shielding the wire harness between the first domain controller and the second domain controller; at the same time, by grounding the shielding layer at the first domain controller end or the second domain controller end and then floating the shielding layer at the other domain controller end to form single-ended grounding, the grounding loop can be avoided, ensuring that the shielding layer effectively discharges the interference current, thereby preventing high-frequency interference from coupling into the communication link through the wire harness. In addition, this method can also reduce the effective area of the conductor and shorten the exposed part of the floating-end wire harness; increase the distance between the conductor and the ground, increase the material distance between the floating wire harness and the nearby conductor or the ground plane through structural design, reduce the capacitance of the exposed wire harness at the floating end, and minimize the floating-end capacitance. Moreover, this method can also optimize the wire harness geometry, avoid parallel wiring, and reduce the effective coupling area; if the floating end is a shielded wire, it can also ensure that the signal wire and the shielding layer are completely coaxial to eliminate the edge electric field. And this method can make the length of the final component wire harness consistent with the length of the vehicle wire harness by reducing the length of the parallel section of the conductor in the exposed wire harness at the floating end, which is equivalent to reducing the length of the component wire harness.

[0042] In another exemplary embodiment of the present application, as Figure 2 shown, there is also provided a vehicle electromagnetic compatibility radiation immunity test device, including: A wire harness shielding module 210 is used to shield the wire harness between the first domain controller and the second domain controller to obtain a wire harness shielding result. As some examples, the wire harness between the first domain controller and the second domain controller can be an Ethernet wire harness. As some examples, the wire harness shielding result includes, but is not limited to, the outer layer shielding result of the wire harness between the first domain controller and the second domain controller, and the inner layer shielding result of the wire harness between the first domain controller and the second domain controller.

[0043] A capacitance coupling module 220 is used to ground the shielding layer at the first domain controller end and float the shielding layer at the second domain controller end; or, ground the shielding layer at the second domain controller end and float the shielding layer at the first domain controller end to form a capacitance coupling between the shielding layer and the ground plane; wherein, the shielding layer is formed based on the wire harness shielding result. As some examples, the shielding layer includes, but is not limited to, being formed according to the outer layer shielding result of the wire harness between the first domain controller and the second domain controller, and also includes being formed according to the inner layer shielding result of the wire harness between the first domain controller and the second domain controller.

[0044] A test module 230 is used to perform an electromagnetic compatibility radiation immunity test on the vehicle according to the wire harness shielding result and the capacitance coupling; wherein, the vehicle includes a first domain controller and a second domain controller.

[0045] In some embodiments of the present application, the process of shielding the wire harness between the first domain controller and the second domain controller by the wire harness shielding module 210 includes: shielding the outer layer of the wire harness between the first domain controller and the second domain controller by combining aluminum foil and braided copper mesh; and / or shielding the inner layer of the wire harness between the first domain controller and the second domain controller by individually wrapping the twisted pair with aluminum foil. As an example, for the interference of high-frequency electric fields such as 16 - 38 MHz, the outer layer of the wire harness between the first domain controller and the second domain controller can be shielded by combining aluminum foil and braided copper mesh. At this time, the combination of aluminum foil and braided copper mesh can be used as the shielding layer. As another example, in order to cancel the crosstalk between differential signal lines, the inner layer of the wire harness between the first domain controller and the second domain controller can be shielded by individually wrapping the twisted pair with aluminum foil. At this time, the aluminum foil can be used as the shielding layer. In addition, when shielding the wire harness between the first domain controller and the second domain controller, the shielding effectiveness can also be calculated as: SE = R + X + B, where SE represents the shielding effectiveness; R represents the reflection loss, which is related to the surface impedance of the shielding layer material and the frequency; X represents the absorption loss, which is related to the thickness of the shielding layer and the frequency; B represents the multiple reflection correction loss. By calculating the shielding effectiveness, the suppression ability of the shielding layer material to electromagnetic interference can be quantified, so as to select a suitable shielding layer material when shielding the wire harness between the first domain controller and the second domain controller. Among them, the shielding layer materials include but are not limited to aluminum foil, braided copper mesh, etc. It can be seen that by performing outer layer shielding and inner layer shielding on the wire harness between the first domain controller and the second domain controller, the wire harness between the first domain controller and the second domain controller can be fully shielded, thereby reconstructing the electromagnetic compatibility of the Ethernet wire harness between the first domain controller and the second domain controller, blocking the high-frequency interference coupling path, and meeting the vehicle-level EMC test requirements.

[0046] In some embodiments of the present application, due to the potential difference between different grounding points, such as the difference in grounding resistance at different parts of the vehicle body and the voltage fluctuation caused by large current loads, a closed current path will be formed in the shielding layer, which is called a ground loop. At this time, the shielding layer at the first domain controller end can be grounded, and the shielding layer at the second domain controller end can be floated; or, the shielding layer at the second domain controller end can be grounded, and the shielding layer at the first domain controller end can be floated. At this time, a capacitive coupling is formed between the shielding layer and the ground, but there is no direct current path, thus blocking the formation of the ground loop. Since the shielding layer is only grounded at one end, any noise current with a frequency lower than the cut-off frequency of the shielding layer cannot form a closed loop. Among them, the cut-off frequency of the shielding layer is determined by the distributed capacitance. The distributed capacitance between the shielding layer and the internal wire harness forms a bypass for high-frequency interference, directing the noise directly to the ground. Therefore, after a capacitive coupling is formed between the shielding layer and the ground plane, the vehicle electromagnetic compatibility radiated immunity test device can further include: The distributed capacitance between the shielding layer and the internal wire harness is regarded as the distributed capacitance between the interference source and the signal wire, denoted as parasitic capacitance; among them, the interference source is used to apply a noise voltage. As some examples, the interference source includes but is not limited to high-voltage wire harnesses, radio frequency radiation sources, etc.

[0047] Based on the parasitic capacitance, the noise voltage applied by the interference source, and the phase difference between the noise voltage and the noise current, calculate the high-frequency noise current coupled from the parasitic capacitance into the signal wire, and there is: ; in the formula, represents the high-frequency noise current coupled from the parasitic capacitance into the signal wire; is the imaginary unit, indicating that there is a phase difference between the noise voltage and the noise current; represents the angular frequency, represents the parasitic capacitance, represents the noise voltage applied by the interference source. The single-ended grounded shielding layer is equivalent to an electrostatic shielding body, and the external electric field is neutralized by the charges on the surface of the shielding layer, and the internal signal wire is not affected by the external electric field. When high-frequency (for example, 16 MHz to 100 MHz) interference is coupled to the shielding layer through the electromagnetic field, the current quickly flows into the vehicle body ground through the single-ended grounding point, avoiding accumulation in the shielding layer.

[0048] Control the high-frequency noise current to flow on the surface of the shielding layer, and, calculate the skin depth according to the magnetic permeability of the shielding layer material, the conductivity of the shielding layer material, and the angular frequency, and there is: ; in the formula, represents the skin depth, represents the magnetic permeability of the shielding layer material, represents the conductivity of the shielding layer material. By controlling the high-frequency current to flow on the surface of the shielding layer, the penetration of the internal wire harness can be further reduced.

[0049] Adjust the shielding layer material according to the skin depth to reduce the loss through the adjustment result of the shielding layer material. As an example, for example, a hollow wire or a flat wire can be used to replace the solid wire in the shielding layer material, which can not only reduce material waste but also reduce the loss caused by the skin effect.

[0050] In a specific embodiment, when single-ended grounding, to prevent the parasitic capacitance from introducing a new loop, at this time, the shielding layer on the side of the first domain controller can be kept insulated from the housing, so as to avoid accidentally forming a grounding loop through paths such as mounting brackets. At the same time, the parasitic capacitance of the floating end to the ground can also be controlled to be less than or equal to 10 pF to prevent the formation of a hidden grounding path at high frequencies.

[0051] In some embodiments of the present application, the vehicle electromagnetic compatibility radiation immunity test device may further include: Denote the domain controller end to be suspended as the floating end, and calculate the capacitance of the exposed wire harness of the floating end, and there is: , in the formula, represents the capacitance of the exposed wire harness at the floating end, represents the vacuum permittivity, represents the relative permittivity of the insulating material, represents the parallel segment length of the conductor in the exposed wire harness at the floating end, represents the width of the conductor in the exposed wire harness at the floating end, represents the spacing distance between the exposed wire harness at the floating end and the ground plane.

[0052] To reduce the effective area of the conductor in the exposed wire harness at the floating end, the exposed part of the wire harness at the floating end can also be shortened, and the parallel segment length of the conductor in the exposed wire harness at the floating end and the width of the conductor in the exposed wire harness at the floating end can be adjusted to reduce the capacitance of the exposed wire harness at the floating end. As an example, the process of adjusting the parallel segment length of the conductor in the exposed wire harness at the floating end and the width of the conductor in the exposed wire harness at the floating end includes: reducing the parallel segment length of the conductor in the exposed wire harness at the floating end, and reducing the width of the conductor in the exposed wire harness at the floating end. Moreover, by reducing the parallel segment length of the conductor in the exposed wire harness at the floating end, it is equivalent to reducing the length of the component wire harness, so that the length of the finally obtained component wire harness is consistent with the length of the vehicle wire harness.

[0053] As another example, for the capacitance between the cylindrical wire harness and the ground plane, it can be obtained that: , where, represents the radius of the cylindrical wire harness. In addition, the process of adjusting the parallel segment length of the conductor in the exposed wire harness at the floating end and the width of the conductor in the exposed wire harness at the floating end can include: reducing the parallel segment length of the conductor in the exposed wire harness at the floating end. Or, increasing the spacing distance between the wire harness at the floating end and the ground plane. Moreover, by reducing the parallel segment length of the conductor in the exposed wire harness at the floating end, it is equivalent to reducing the length of the component wire harness, so that the length of the finally obtained component wire harness is consistent with the length of the vehicle wire harness.

[0054] As yet another example, for the capacitance of the parallel plate capacitor model, it can be obtained that: , represents the effective facing area between the conductor in the wire harness at the floating end and the ground plane, represents the spacing distance between the wire harness at the floating end and the ground plane. If it is required that , using polytetrafluoroethylene insulation ( = 2.1), the spacing distance = 1 mm, then the maximum allowable facing area is: .

[0055] It can be seen that, in order to reduce the capacitance of the exposed wire harness at the floating end, the distance between the conductor and the ground can be increased, and the material distance between the floating wire harness and the nearby conductor or ground plane can be increased through structural design. The geometric shape of the wire harness can also be optimized to avoid parallel routing and reduce the effective coupling area; if the floating end is a shielded wire, the signal wire and the shield layer can also be ensured to be completely coaxial to eliminate the edge electric field.

[0056] In some embodiments of the present application, the vehicle electromagnetic compatibility radiation immunity test device may further include: blocking the common-mode current between the first domain controller and the second domain controller through a common-mode impedance, and the common-mode impedance is obtained by a common-mode yoke coil disposed between the first domain controller and the second domain controller. As an example, for instance, common-mode choke coils CMC can be installed at both ends of the Ethernet wire harness, and the high common-mode impedance of the common-mode choke coils is utilized to block the common-mode current.

[0057] In some embodiments of the present application, the vehicle electromagnetic compatibility radiation immunity test device may further include: detecting the common-mode noise voltage, generating an inverted waveform based on the common-mode noise voltage and injecting it into the grounding path, and performing noise cancellation through the inverted waveform injection grounding path. Also, adjusting the common-mode impedance according to the wire harness length between the first domain controller and the second domain controller, and optimizing the signal transmission matching degree according to the adjustment result of the common-mode impedance.

[0058] In some embodiments of the present application, the vehicle electromagnetic compatibility radiation immunity test device may further include: adding a termination resistor at the Ethernet physical chip end between the first domain controller and the second domain controller. As an example, for instance, a 100Ω termination resistor can be added at the Ethernet physical PHY (Physical Layer Chip) chip end between the first domain controller and the second domain controller to reduce the radiation caused by signal reflection and perform differential signal termination matching.

[0059] In some embodiments of the present application, the vehicle electromagnetic compatibility radiation immunity test device may further include: enhancing the high-frequency components through the Ethernet physical chip between the first domain controller and the second domain controller, and compensating for the wire harness attenuation using the high-frequency components. As an example, for instance, the high-frequency components can be enhanced through the pre-emphasis of the Ethernet PHY chip, and the wire harness attenuation can be compensated by the equalization at the receiving end.

[0060] In some embodiments of the present application, the vehicle electromagnetic compatibility radiation immunity test device may further include: setting resonance points for preset interference frequency points through a pre-integrated or real-time filter circuit. As an example, for instance, a π-type filter circuit (capacitor + ferrite + capacitor) can be integrated, and LC resonance points are set for preset interference frequency points such as 16MHz and 38MHz.

[0061] In some embodiments of the present application, the vehicle electromagnetic compatibility radiation immunity test device may further include: adding a timestamp and a serial number during the electromagnetic compatibility radiation immunity test of the vehicle, and distinguishing occasional Ethernet signal packet loss or continuous interference through the timestamp and the serial number. As an example, during the electromagnetic compatibility radiation immunity test of the vehicle, a timestamp and a serial number may be added on the basis of the original CRC (Cyclic Redundancy Check) check, so as to distinguish occasional Ethernet signal packet loss or continuous interference through the timestamp and the serial number.

[0062] In summary, the present application proposes a vehicle electromagnetic compatibility radiation immunity test device, which obtains a harness shielding result by shielding the harness between the first domain controller and the second domain controller; grounds the shielding layer at the first domain controller end and floats the shielding layer at the second domain controller end; or grounds the shielding layer at the second domain controller end and floats the shielding layer at the first domain controller end to form a capacitive coupling between the shielding layer and the ground plane; wherein, the shielding layer is formed based on the harness shielding result; the vehicle is subjected to electromagnetic compatibility radiation immunity test according to the harness shielding result and the capacitive coupling; wherein, the vehicle includes a first domain controller and a second domain controller. It can be seen that this device can block the high-frequency interference coupling path by fully shielding the harness between the first domain controller and the second domain controller; at the same time, by grounding the shielding layer at the first domain controller end or the second domain controller end and then floating the shielding layer at the other domain controller end to form single-ended grounding, the grounding loop can be avoided, ensuring that the de-shielding layer effectively discharges the interference current, thereby preventing high-frequency interference from coupling into the communication link through the harness. In addition, this device can also reduce the effective area of the conductor and shorten the exposed part of the floating-end harness; increase the distance between the conductor and the ground, increase the material distance between the floating harness and the nearby conductor or the ground plane through structural design, reduce the capacitance of the exposed harness at the floating end, and minimize the floating-end capacitance. Moreover, this device can also optimize the harness geometry, avoid parallel wiring, and reduce the effective coupling area; if the floating end is a shielded wire, it can also ensure that the signal wire and the shielding layer are completely coaxial to eliminate the edge electric field. And this device reduces the length of the parallel section of the conductor in the exposed harness at the floating end, which is equivalent to reducing the length of the component harness, so that the length of the finally obtained component harness is consistent with the length of the vehicle harness.

[0063] It can be understood that the vehicle electromagnetic compatibility radiation immunity test device provided in the above embodiments and the vehicle electromagnetic compatibility radiation immunity test method provided in the above embodiments belong to the same concept. The specific manner of performing operations in the vehicle electromagnetic compatibility radiation immunity test method has been described in detail in the above method embodiments and will not be elaborated here. In actual application, the vehicle electromagnetic compatibility radiation immunity test device provided in the above embodiments can allocate the above functions to different functional modules as needed, that is, divide the internal structure of the vehicle electromagnetic compatibility radiation immunity test device into different functional modules, and then implement all or part of the functions of the corresponding functional modules through the vehicle electromagnetic compatibility radiation immunity test method described in the above embodiments. No specific limitation will be made here either.

[0064] In another exemplary embodiment of the present application, this embodiment further provides a computer device, which may include a memory, a processor, and a computer program stored on the memory. The processor executes the computer program to cause the computer device to execute Figure 1 the steps of the vehicle electromagnetic compatibility radiation immunity test method described above. Figure 3 The structural schematic diagram of a computer device 1000 is shown. Refer to Figure 3 As shown, the computer device 1000 includes: a processor 1010, a memory 1020, a power supply 1030, a display unit 1040, and an input unit 1060.

[0065] The processor 1010 is the control center of the computer device 1000, connecting each component through various interfaces and lines, and executing various functions of the computer device 1000 by running or executing the computer program / instructions stored in the memory 1020, so as to monitor the computer device 1000 as a whole. In the embodiments of the present application, when the processor 1010 calls the computer program stored in the memory 1020, it executes the steps of Figure 1 the vehicle electromagnetic compatibility radiation immunity test method described above. Optionally, the processor 1010 may include one or more processing units; preferably, the processor 1010 may integrate an application processor and a modulation and demodulation processor. Among them, the application processor mainly processes the operating system, user interface, applications, etc., and the modulation and demodulation processor mainly processes wireless communication. In some embodiments, the processor and the memory can be implemented on a single chip, and in some embodiments, they can also be implemented on separate chips respectively.

[0066] The memory 1020 may mainly include a program storage area and a data storage area. Among them, the program storage area may store an operating system, various applications, etc.; the data storage area may store instruction data created according to the use of the computer device 1000, etc. In addition, the memory 1020 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other non-volatile solid-state storage devices, etc.

[0067] The computer device 1000 further includes a power supply 1030 (such as a battery) for powering each component. The power supply can be logically connected to the processor 1010 through a power management system, so as to manage functions such as charging, discharging, and power consumption through the power management system.

[0068] The display unit 1040 can be used to display information input by the user or information provided to the user, as well as various menus of the computer device 1000, etc. In the embodiments of the present application, it is mainly used to display the display interfaces of various applications in the computer device 1000 and objects such as text and pictures displayed in the display interfaces. The display unit 1040 may include a display panel 1050. The display panel 1050 can be configured in the form of a liquid crystal display (LCD), an organic light-emitting diode (OLED), etc.

[0069] The input unit 1060 can be used to receive information such as numbers or characters input by the user. The input unit 1060 may include a touch panel 1070 and other input devices 1080. Among them, the touch panel 1070, also known as a touch screen, can collect touch operations of the user on or near it (such as operations of the user using a finger, a stylus, or any suitable object or accessory on or near the touch panel 1070).

[0070] Specifically, the touch panel 1070 can detect the touch operation of the user, detect the signals brought by the touch operation, convert these signals into contact coordinates, send them to the processor 1010, and receive and execute the commands sent by the processor 1010. In addition, the touch panel 1070 can be implemented in multiple types such as resistive, capacitive, infrared, and surface acoustic wave. The other input devices 1080 may include, but are not limited to, one or more of a physical keyboard, function keys (such as volume control keys, power on / off keys, etc.), a trackball, a mouse, a joystick, etc.

[0071] Of course, the touch panel 1070 can cover the display panel 1050. After the touch panel 1070 detects a touch operation on or near it, the touch panel 1070 transmits the detected information to the processor 1010 to determine the type of touch event. Subsequently, the processor 1010 provides a corresponding visual output on the display panel 1050 according to the type of touch event. Although in Figure 3 the touch panel 1070 and the display panel 1050 are implemented as two independent components to achieve the input and output functions of the computer device 1000, in some embodiments, the touch panel 1070 and the display panel 1050 can be integrated to achieve the input and output functions of the computer device 1000.

[0072] The computer device 1000 may further include one or more sensors, such as a pressure sensor, a gravitational acceleration sensor, a proximity light sensor, etc. Of course, according to the needs in specific applications, the above computer device 1000 may further include other components such as a camera.

[0073] The embodiment of the present application further provides a computer-readable storage medium. A computer program / instructions is stored in the storage medium. When the computer program / instructions are executed by a processor, the above device can execute the steps of the vehicle electromagnetic compatibility radiation immunity test method as described in Figure 1 the present application.

[0074] Those skilled in the art can understand that Figure 3 only examples of computer devices are given, which do not constitute a limitation to the device. The device may include more or fewer components than those shown in the figure, or combine some components, or different components. For the convenience of description, the above parts are divided into various modules (or units) and described separately according to their functions. Of course, when implementing the present application, the functions of the various modules (or units) can be implemented in the same or multiple software or hardware. For example, as some examples, the aforementioned computer device may be a vehicle, a vehicle-mounted computer, etc.

[0075] Those skilled in the art should understand that the present application may be implemented in the form of a computer program product on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code. The present application is described with reference to the flowcharts and / or block diagrams of methods, devices (apparatuses), and computer program products according to the embodiments of the present application. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be applied to the processors of general-purpose computers, special-purpose computers, embedded processors, or other programmable data processing devices to generate a machine, such that the instructions executed by the processors of the computer or other programmable data processing devices generate a device for implementing the functions specified in Figure 1 one process or multiple processes and / or blocks Figure 1 one block or multiple blocks. These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, such that the instructions stored in the computer-readable memory generate a manufactured article including an instruction device that implements the functions specified in Figure 1 one process or multiple processes and / or blocks Figure 1 one block or multiple blocks. These computer program instructions can also be loaded onto a computer or other programmable data processing device, such that a series of operation steps are executed on the computer or other programmable device to generate a computer-implemented process. Thus, the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in Figure 1 one process or multiple processes and / or blocks Figure 1 one block or multiple blocks.

[0076] In another exemplary embodiment of the present application, the embodiment further provides a vehicle that is applied to the vehicle electromagnetic compatibility radiation immunity test method described in some of the above embodiments, or is applied to the vehicle electromagnetic compatibility radiation immunity test device described in some of the above embodiments. Since the specific manners of operation of the vehicle electromagnetic compatibility radiation immunity test method and the vehicle electromagnetic compatibility radiation immunity test device have been described in detail in the embodiments, the technical functions and effects of the vehicle provided in this embodiment can be referred to the above embodiments, and will not be elaborated here.

[0077] It can be understood that although terms such as first and second may be used in this application to describe domain controllers and the like, these terms are only used to distinguish domain controllers from each other. For example, without departing from the scope of the embodiments of this application, the first domain controller may also be referred to as the second domain controller, and similarly, the second domain controller may also be referred to as the first domain controller.

[0078] The above embodiments are only illustrative of the principles and effects of this application and are not intended to limit this application. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of this application. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed in this application should still be covered by the claims of this application.

Claims

1. A vehicle electromagnetic compatibility radiation immunity test method, characterized in that, The method includes the following steps: Shield the wire harness between the first domain controller and the second domain controller to obtain a wire harness shielding result; Ground the shielding layer at the first domain controller end and float the shielding layer at the second domain controller end; or, ground the shielding layer at the second domain controller end and float the shielding layer at the first domain controller end to form a capacitive coupling between the shielding layer and the ground plane; wherein, the shielding layer is formed based on the wire harness shielding result; Conduct an electromagnetic compatibility radiation immunity test on the vehicle according to the wire harness shielding result and the capacitive coupling; wherein, the vehicle includes the first domain controller and the second domain controller.

2. The vehicle electromagnetic compatibility radiation immunity test method according to claim 1, characterized in that The process of shielding the wire harness between the first domain controller and the second domain controller includes: Shield the outer layer of the wire harness between the first domain controller and the second domain controller by combining aluminum foil and braided copper mesh; and / or, Shield the inner layer of the wire harness between the first domain controller and the second domain controller by individually wrapping the twisted pair with aluminum foil.

3. The vehicle electromagnetic compatibility radiation immunity test method according to claim 1 or 2, characterized in that, After forming a capacitive coupling between the shielding layer and the ground plane, the method further includes: Regard the distributed capacitance between the shielding layer and the internal wire harness as the distributed capacitance between the interference source and the signal line, denoted as parasitic capacitance; wherein, the interference source is used to apply a noise voltage; Calculate the high-frequency noise current coupled from the parasitic capacitance to the signal line based on the parasitic capacitance, the noise voltage applied by the interference source, and the phase difference between the noise voltage and the noise current; Control the high-frequency noise current to flow on the surface of the shielding layer, and calculate the skin depth according to the magnetic permeability of the shielding layer material, the conductivity of the shielding layer material, and the preset angular frequency; Adjust the shielding layer material according to the skin depth.

4. The vehicle electromagnetic compatibility radiation immunity test method according to claim 1, wherein The method further includes: Denote the domain controller end to be floated as the floating end, and calculate the capacitance of the exposed wire harness at the floating end; Adjust the parallel segment length of the conductor in the exposed wire harness at the floating end and the width of the conductor in the exposed wire harness at the floating end to reduce the capacitance of the exposed wire harness at the floating end; including: reducing the parallel segment length of the conductor in the exposed wire harness at the floating end, and reducing the width of the conductor in the exposed wire harness at the floating end; or, under the condition that the exposed wire harness at the floating end is cylindrical, reducing the parallel segment length of the conductor in the exposed wire harness at the floating end, or increasing the spacing distance between the floating end wire harness and the ground plane.

5. The vehicle electromagnetic compatibility radiation immunity test method according to claim 1, characterized in that, The method further includes: Block the common-mode current between the first domain controller and the second domain controller through a common-mode impedance, and the common-mode impedance is obtained through a common-mode choke coil arranged between the first domain controller and the second domain controller; and / or, Adjust the common-mode impedance according to the wire harness length between the first domain controller and the second domain controller, and optimize the signal transmission matching degree according to the common-mode impedance adjustment result; and / or, Detect the common-mode noise voltage, generate an inverted waveform based on the common-mode noise voltage and inject it into the grounding path, and perform noise cancellation through the inverted waveform injection grounding path.

6. The vehicle electromagnetic compatibility radiation immunity test method according to claim 1, wherein The method further includes: Add a termination resistor at the Ethernet physical chip end between the first domain controller and the second domain controller; and / or, Enhance high-frequency components through the Ethernet physical chip between the first domain controller and the second domain controller, and use the high-frequency components for harness attenuation compensation; and / or, Set resonance points for preset interference frequency points through a pre-integrated or real-time filtering circuit.

7. The vehicle electromagnetic compatibility radiation immunity test method according to claim 1, wherein The method further includes: adding a timestamp and a serial number during the electromagnetic compatibility radiated immunity test of the vehicle, and distinguishing occasional Ethernet signal packet loss through the timestamp and the serial number, or distinguishing continuous interference through the timestamp and the serial number.

8. A vehicle electromagnetic compatibility radiation immunity test device, characterized in that, The device includes: A harness shielding module for shielding the harness between the first domain controller and the second domain controller to obtain a harness shielding result; A capacitance coupling module for grounding the shielding layer at the first domain controller end and floating the shielding layer at the second domain controller end; or, grounding the shielding layer at the second domain controller end and floating the shielding layer at the first domain controller end to form capacitance coupling between the shielding layer and the ground plane; wherein, the shielding layer is formed based on the harness shielding result; A test module for performing an electromagnetic compatibility radiated immunity test on the vehicle according to the harness shielding result and the capacitance coupling; wherein, the vehicle includes the first domain controller and the second domain controller.

9. A vehicle, characterized in that, The vehicle is applied to the vehicle electromagnetic compatibility radiated immunity test device as described in claim 8, or the vehicle is applied to the vehicle electromagnetic compatibility radiated immunity test method as described in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, A computer program is stored thereon, and when the computer program is executed by a processor, it implements the steps of the vehicle electromagnetic compatibility radiated immunity test method as described in any one of claims 1 to 7.

Images