Electromagnetic compatibility test system

Abstract

The utility model relates to an electromagnetic compatibility test system, which comprises a shielding chamber, a whole vehicle load device, a part load device and a test device, and is characterized in that the whole vehicle load device is used for applying a load to a tested whole vehicle, the part load device is used for applying a load to a tested part, the tested whole vehicle and the tested part are arranged in the shielding chamber, and the test device is arranged in the shielding chamber. And the test equipment is used for testing electromagnetic radiation generated by the tested whole vehicle and the tested parts. According to the technical scheme, on one hand, the electromagnetic compatibility test is carried out in the same darkroom test environment, the consistency of obtained data is good, the test accuracy is improved, on the other hand, multiple tests can be carried out in the same site, repeated construction of the test site is avoided, transition among multiple sites can be avoided, and the test efficiency is improved. And the development efficiency is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of vehicle testing, and particularly to an electromagnetic compatibility testing system. Background Art

[0002] Electromagnetic compatibility (EMC) is an important means for evaluating electromagnetic interference (EMI) and electromagnetic sensitivity (EMS) of electronic devices, and is one of the most important indicators of product quality. The electromagnetic compatibility testing equipment in the related art usually focuses on a single testing item, that is, one device can only perform one corresponding testing item. Therefore, it is necessary to construct multiple testing sites for multiple testing items respectively, resulting in duplicate construction and high testing costs; and changing different sites according to different testing items leads to low testing efficiency; in addition, the testing is carried out in different anechoic chambers, which is also likely to cause differences in test data due to differences in anechoic chamber environments, affecting the accuracy of the test. Summary of the Utility Model

[0003] To overcome the problems existing in the related art, the present disclosure provides an electromagnetic compatibility testing system.

[0004] According to an embodiment of the present disclosure, there is provided an electromagnetic compatibility testing system, including:

[0005] A shielding room;

[0006] A vehicle load device for applying a load to the vehicle under test;

[0007] A component load device for applying a load to the components under test;

[0008] Wherein, the vehicle under test and the components under test are arranged in the shielding room; and

[0009] A testing device for testing the electromagnetic radiation generated by the vehicle under test and the components under test.

[0010] Optionally, the testing device includes:

[0011] A testing antenna arranged in the shielding room for receiving the electromagnetic radiation emitted by the vehicle under test and the components under test; and

[0012] A receiver for performing signal compensation and digital display on the electromagnetic radiation received by the testing antenna.

[0013] Optionally, the testing antenna and the receiver are connected by a coaxial cable.

[0014] Optionally, the component load device includes a powertrain load device for applying a load to the powertrain and an electronic device load device for applying a load to high-voltage components and / or low-voltage components.

[0015] Optionally, the powertrain load device includes a dynamometer for applying speed and torque loads to the powertrain, and two dynamometers are symmetrically arranged on the left and right sides of the powertrain.

[0016] Optionally, the dynamometer is arranged outside the shielding chamber, and the dynamometer is connected to the powertrain through a connecting shaft passing through the shielding chamber.

[0017] Optionally, the electronic device load device includes an analog load box connected to the high-voltage component and / or the low-voltage component, and the analog load box is arranged inside the shielding chamber.

[0018] Optionally, a metal test bench is arranged inside the shielding chamber, the metal test bench is grounded, and the high-voltage component and / or the low-voltage component and the analog load box are arranged on the metal test bench.

[0019] Optionally, the shielding chamber is provided with a shielding door for opening or closing the shielding chamber.

[0020] Optionally, the shielding chamber is an anechoic chamber.

[0021] The technical solutions provided by the embodiments of the present disclosure may include the following beneficial effects: The present disclosure provides an electromagnetic compatibility test system that can simultaneously meet multiple test items, that is, it can simultaneously perform electromagnetic compatibility tests on the whole vehicle and components in the same shielding chamber. In this way, on the one hand, the electromagnetic compatibility test is carried out in the same anechoic chamber test environment, and the consistency of the obtained data is better, which is beneficial to improving the accuracy of the test. On the other hand, multiple tests can be carried out in the same venue, avoiding the repeated construction of the test venue and avoiding the transfer between multiple venues, thus improving the development efficiency.

[0022] The electromagnetic compatibility test system provided by the present disclosure can simultaneously perform tests on the whole vehicle and components. From the perspective of forward development, the electromagnetic compatibility performance of the components can be tested first, and then the whole vehicle verification can be carried out on the vehicle equipped with the tested components; from another perspective, the electromagnetic compatibility performance of the whole vehicle can be tested first, and then the component test can be carried out immediately for the problems found, and rectification can be carried out. In this way, a closed loop is formed between the whole vehicle test and the component test, which is beneficial to maximizing the development efficiency.

[0023] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. Description of the Drawings

[0024] The accompanying drawings here are incorporated into the specification and constitute a part of this specification, showing embodiments in line with the present disclosure, and are used together with the specification to explain the principles of the present disclosure.

[0025] Figure 1 It is an electromagnetic compatibility test system provided by an exemplary embodiment of the present disclosure.

[0026] Figures 2 to 4 It is a schematic diagram of the electromagnetic compatibility test system provided by the present disclosure under different test scenarios, where: Figure 2 It is shown as a vehicle electromagnetic compatibility test; Figure 3 It is shown as a drive assembly electromagnetic compatibility test; Figure 4 It is shown as a high-voltage component and / or low-voltage component electromagnetic compatibility test.

[0027] Explanation of reference numerals

[0028] 1 - Shielded room, 11 - Metal test bench, 12 - Shielded door, 2 - Vehicle load equipment, 3 - Component load equipment, 31 - Power assembly load equipment, 311 - Connecting shaft, 32 - Electronic device load equipment, 4 - Test equipment, 41 - Test antenna, 42 - Receiver, 43 - Coaxial cable, 100 - Whole vehicle, 200 - Power assembly, 300 - High-voltage component and / or low-voltage component. Detailed implementation manners

[0029] Here, the exemplary embodiments will be described in detail, and the examples are shown in the accompanying drawings. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present disclosure. On the contrary, they are only examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0030] The implementation manners described in some embodiments of the present disclosure below do not represent all implementation manners consistent with the present disclosure. On the contrary, they are only examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0031] It should be noted that all actions of obtaining signals, information, or data in the present disclosure are carried out on the premise of complying with the corresponding data protection regulations and policies of the country where it is located and obtaining the authorization given by the owner of the corresponding device.

[0032] Such as Figures 1 to 4As shown, an exemplary embodiment of the present disclosure provides an electromagnetic compatibility test system. Specifically, the electromagnetic compatibility test system includes a shielded room 1, a vehicle load device 2, a component load device 3, and a test device 4. Among them: The vehicle load device 2 is used to apply a load to the vehicle under test; the component load device 3 is used to apply a load to the components under test; the test device 4 is used to test the electromagnetic radiation generated by the vehicle under test and the components under test.

[0033] The shielded room 1 can, for example, adopt an anechoic chamber, which can provide a test environment that meets the background noise requirements for electromagnetic compatibility testing. Its feature is that it can isolate electromagnetic radiation in space, prevent the internal electromagnetic radiation from generating diffuse reflection, and provide a grounding solution that simulates the actual vehicle conditions for the entire test environment.

[0034] The "load" in the vehicle load and component load here can be understood as making the vehicle and components work. And according to whether it is the vehicle or the components that are loaded, different methods can be used. For example, as will be described in detail later, the components can include a powertrain 200 and high-voltage components and / or low-voltage components 300. Among them, applying a load to the powertrain 200 means applying a driving force to the motor, and the motor will generate electromagnetic radiation when it works, while applying a load to the high-voltage components and / or low-voltage components 300 means applying a simulated signal to the high-voltage components and / or low-voltage components 300, and the high-voltage components and / or low-voltage components 300 will generate electromagnetic radiation when they work. Among them, the load on the vehicle means applying a load to the powertrain 200 and the high-voltage components and / or low-voltage components 300 in the vehicle simultaneously.

[0035] The difference between the electromagnetic compatibility test of the vehicle 100 and the compatibility test of the components is that the former is for testing the electromagnetic compatibility of the vehicle 100, and the latter is for more targeted electromagnetic compatibility testing of the components including the powertrain 200 and the high-voltage components and / or low-voltage components 300. The component electromagnetic compatibility test can be understood as independently testing the components removed from the vehicle. Therefore, in related technologies, the tests of the two are usually carried out in different sites. However, in the present disclosure, the electromagnetic compatibility test of the vehicle and the compatibility test of the components are placed in the same shielded room 1, and the electromagnetic compatibility test of the vehicle and the compatibility test of the components share the same set of test devices 4.

[0036] The technical solutions provided by the embodiments of the present disclosure may include the following beneficial effects: The electromagnetic compatibility test system provided by the present disclosure can simultaneously meet various test items for the entire vehicle 100 and components including the powertrain 200 and high-voltage components and / or low-voltage components 300. In this way, on the one hand, the electromagnetic compatibility test is carried out in the same anechoic chamber test environment, and the consistency of the obtained data is relatively good, which is beneficial to improving the accuracy of the test. On the other hand, various tests can be carried out in the same venue, avoiding repeated construction of the test venue and avoiding transfer between multiple venues, thereby improving the development efficiency.

[0037] From the perspective of forward development, the electromagnetic compatibility performance of components can be tested first, and then the entire vehicle equipped with the tested components can be verified; from another perspective, the electromagnetic compatibility performance of the entire vehicle can be tested first, and then component testing can be carried out immediately for the problems found and rectified. In this way, a closed loop is formed between the entire vehicle test and the component test, which is beneficial to maximizing the development efficiency.

[0038] The electromagnetic compatibility test of the entire vehicle and the compatibility test of components share the same set of test equipment 4. In some embodiments, the test equipment 4 includes a test antenna 41 and a receiver 42, where: The test antenna 41 is arranged in the shielding chamber 1 and is used to receive the electromagnetic radiation emitted by the vehicle under test and the components under test; the receiver 42 is used to perform signal compensation and digital display on the electromagnetic radiation received by the test antenna 41, and the test personnel can judge the results of the electromagnetic compatibility test based on this. The use and interpretation of the receiver 42 belong to the conventional capabilities of those skilled in the art, and the present disclosure will not elaborate on this.

[0039] The receiver 42 can be arranged outside the shielding chamber 1, which is beneficial to avoiding interference of the generated electromagnetic radiation on the receiver 42. And the receiver 42 is arranged outside the shielding chamber 1, which is also beneficial to observing the digital display result and making a judgment on the test result in a timely manner. Optionally, the test antenna 41 and the receiver 42 are connected by a coaxial cable 43. The coaxial cable can be used for the transmission of analog signals and digital signals and can achieve lossless transmission of signals, improving the accuracy of the test.

[0040] The component load device 3 may include a powertrain load device 31 for applying a load to the powertrain 200 and an electronic device load device 32 for applying a load to the high-voltage components and / or low-voltage components 300.

[0041] The powertrain load device 31 may include a dynamometer for applying speed and torque loads to the powertrain 200. The dynamometer can be used to simulate the operating conditions of a real vehicle and perform speed and torque loading according to requirements. The dynamometer system can meet the requirements of high-speed motor testing, or the testing of the integrated motor and controller assembly, or the testing of the three-in-one powertrain of the motor, controller, and reducer, etc. Among them, the dynamometer may include two symmetrically arranged on the left and right sides of the powertrain 200. That is, the present disclosure adopts the scheme of double dynamometers on the left and right sides, which can meet the dual-output shaft loading of the powertrain 200, and the dual-output shaft loading scheme is closer to the actual vehicle installation state, the wheelbase corresponds to the actual wheelbase of the vehicle, and the entire layout can be centered and symmetric with reference to the actual vehicle.

[0042] Optionally, the dynamometer is arranged outside the shielding room 1, and the dynamometer is connected to the powertrain 200 through a connecting shaft 311 passing through the shielding room 1. Arranging the dynamometer outside the shielding room 1 can avoid interference with the test results caused by the vibration and electromagnetic radiation generated when the dynamometer works. In addition, a shielding cover can be provided outside the testing machine. The connecting shaft 311 can be made of an insulating material and is connected between the dynamometer and the powertrain 200. Considering that the entire vehicle can be tested inside the shielding room 1 at the same time, the floor area of the shielding room 1 is relatively larger than that when only parts can be tested. By providing the connecting shaft 311, the power can be extended from the external dynamometer to the powertrain 200 while ensuring that the wheelbase of the powertrain 200 corresponds to the actual wheelbase of the vehicle.

[0043] Among them, the electronic device load device 32 includes an analog load box connected to the high-voltage components and / or low-voltage components 300, and the analog load box is arranged inside the shielding room 1. The high-voltage components mainly refer to general high-voltage components other than the high-speed motor, such as a charger, a battery pack, a BMS, etc., and the low-voltage components can be low-voltage devices such as vehicle lights and audio systems. Optionally, a metal test bench 11 can be arranged inside the shielding room 1. The metal test bench 11 can be made of copper material, for example, and the metal test bench 11 is grounded. The high-voltage components and / or low-voltage components 300 and the analog load box are arranged on the metal test bench 11 and are connected through connecting wires.

[0044] The shielding room 1 can also be provided with a shielding door 12 for opening or closing the shielding room 1. By providing the shielding door 12, it is convenient for testers and the entire vehicle to enter and exit the shielding room 1. The shielding door 12 can be provided with one or more, and the sizes of the shielding doors 12 can be the same or different. For example, the shielding door 12 for the entire vehicle to enter can be larger than the shielding door 12 for testers to enter.

[0045] In the foregoing detailed description, reference has been made to the accompanying drawings, which show by way of illustration specific aspects in which the present disclosure may be practiced. In this regard, directional or positional relationship terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. may be used with reference to the orientation of the described figures. Since the components of the described device may be positioned in a plurality of different orientations, the directional terms may be used for illustrative purposes and not be limiting. It should be understood that other aspects may be utilized and structural or logical changes may be made without departing from the concepts of the present disclosure. Accordingly, the following detailed description should not be taken in a limiting sense.

[0046] It should be understood that, unless otherwise specifically stated, the features of some embodiments of the various aspects of the present disclosure described herein may be combined with each other. As used herein, the term "and / or" includes any one of the related listed items and any combination of any two or more of them; similarly, "at least one of..." includes any one of the related listed items and any combination of any two or more of them.

[0047] It should be understood that, unless otherwise clearly defined and limited, the terms "engage", "attach", "mount", "connect", "couple", "fix", etc. used in the embodiments of the present disclosure should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integral; it may be a mechanical connection, an electrical connection, or communicable with each other; it may be directly connected, or indirectly connected through an intermediate medium, and may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure may be understood according to specific circumstances.

[0048] In addition, the term "above" used with respect to a component, element, or layer of material formed "above" or located "above" a surface may be used herein to mean that the component, element, or layer of material is "indirectly" positioned (e.g., placed, formed, deposited, etc.) on the surface such that one or more additional components, elements, or layers are disposed between the surface and the component, element, or layer of material. However, the term "above" used with respect to a component, element, or layer of material formed "above" or located "above" a surface may alternatively have a specific meaning: the component, element, or layer of material is "directly" positioned (e.g., placed, formed, deposited, etc.) on the surface, e.g., in direct contact with the surface.

[0049] Although terms such as "first", "second", and "third" may be used herein to describe various components, parts, regions, layers, or sections, these components, parts, regions, layers, or sections are not limited to these terms. Instead, these terms are only used to distinguish one component, part, region, layer, or section from another. Thus, a first component, part, region, layer, or section referred to in the examples described herein may also be termed a second component, part, region, layer, or section without departing from the teachings of the respective examples. Additionally, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description herein, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0050] It should be understood that spatial relative terms, such as "above", "upper", "below", and "lower", are used herein to describe the relationship of one element shown in the figures to another element. In addition to the orientation depicted in the figures, such spatial relative terms are also intended to encompass different orientations of the device during use or operation. For example, if the device in the figures is flipped, an element described as "above" or "upper" relative to another element will then be "below" or "lower" relative to that other element. Thus, the term "above" encompasses both the above and below orientations depending on the spatial orientation of the device. The device may have other orientations (e.g., rotated 90 degrees or in other orientations), and the spatial relative terms used herein should be interpreted accordingly.

[0051] Furthermore, the word "exemplary" is used herein to mean serving as an example, instance, or illustration. Any aspect or design described herein as "exemplary" is not necessarily to be construed as being advantageous compared to other aspects or designs. Instead, the use of the word exemplary is intended to present concepts in a concrete manner. As used herein, the term "or" is intended to mean an inclusive "or" rather than an exclusive "or". That is, unless otherwise specified, or clear from the context, "X applies A or B" is intended to mean any of the natural inclusive permutations. That is, if X applies A; X applies B; or X applies both A and B, then "X applies A or B" is satisfied under any of the foregoing instances. Additionally, unless otherwise specified or clear from the context indicating a singular form, the articles "a" and "an" as used in this application and the appended claims are generally understood to mean "one or more".

[0052] Similarly, although the present disclosure has been shown and described with respect to one or more implementations, equivalent variations and modifications will occur to those skilled in the art upon reading and understanding the specification and drawings. The present disclosure includes all such modifications and variations and is limited only by the scope of the claims. Specifically with respect to the various functions performed by the components described above (e.g., elements, resources, etc.), unless otherwise indicated, the terms used to describe such components are intended to correspond to any component (functionally equivalent) that performs the specific function of the described component, even if not structurally equivalent to the disclosed structure. Additionally, although a particular feature of the present disclosure may have been disclosed with respect to only one of several implementations, such a feature may, as may be desired and advantageous for any given or particular application, be combined with one or more other features of the other implementations. Further, with respect to the use of "comprises," "has," "includes," "contains," or variants thereof in the detailed description or claims, such terms are intended to be inclusive in a manner similar to the term "including."

[0053] Other embodiments of the present disclosure will readily occur to those of ordinary skill in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include known or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of the present disclosure are pointed out by the appended claims.

[0054] It should be understood that the present disclosure is not limited to the exact structures described above and shown in the drawings, and various modifications and changes may be made without departing from its scope. The scope of the present disclosure is limited only by the appended claims.

Claims

1. An electromagnetic compatibility test system, characterized in that, Comprising: A shielding chamber; A vehicle load device for applying a load to the vehicle under test; A component load device for applying a load to the component under test; Wherein, the vehicle under test and the component under test are arranged in the shielding chamber; And A testing device for testing the electromagnetic radiation generated by the vehicle under test and the component under test.

2. The electromagnetic compatibility test system according to claim 1, wherein The testing device includes: A testing antenna arranged in the shielding chamber for receiving the electromagnetic radiation emitted by the vehicle under test and the component under test; and A receiver for compensating the signal of the electromagnetic radiation received by the testing antenna and digitally displaying it.

3. The electromagnetic compatibility test system according to claim 2, characterized in that The testing antenna and the receiver are connected by a coaxial cable.

4. The electromagnetic compatibility test system according to claim 1, characterized in that, The component load device includes a powertrain load device for applying a load to the powertrain and an electronic device load device for applying a load to high-voltage components and / or low-voltage components.

5. The electromagnetic compatibility test system according to claim 4, characterized in that, The powertrain load device includes a dynamometer for applying speed and torque loads to the powertrain, and two dynamometers are symmetrically arranged on the left and right sides of the powertrain.

6. The electromagnetic compatibility test system according to claim 5, characterized in that, The dynamometer is arranged outside the shielding chamber, and the dynamometer is connected to the powertrain through a connecting shaft passing through the shielding chamber.

7. The electromagnetic compatibility test system according to claim 4, characterized in that, The electronic device load device includes an analog load box connected to the high-voltage components and / or low-voltage components, and the analog load box is arranged in the shielding chamber.

8. The electromagnetic compatibility test system according to claim 7, characterized in that A metal test bench is arranged in the shielding chamber, the metal test bench is grounded, and the high-voltage components and / or low-voltage components and the analog load box are arranged on the metal test bench.

9. The electromagnetic compatibility test system according to claim 1, characterized in that, The shielding chamber is provided with a shielding door for opening or closing the shielding chamber.

10. The electromagnetic compatibility test system according to claim 1, wherein The shielding chamber is an anechoic chamber.

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