Vehicle wireless communication performance testing device and method

Abstract

The application provides a whole vehicle wireless communication performance testing device and method, the device comprises: a composite reverberation chamber, a single-probe millimeter wave measurement antenna and a reverberation chamber measurement antenna are arranged in the composite reverberation chamber, and electromagnetic regulation superstructures are respectively arranged on the inner surface of the composite reverberation chamber and the surface of the mode stirring plate; the electromagnetic regulation superstructure is used for fully absorbing or fully reflecting incident electromagnetic waves by adjusting the working state; in the full absorption state, the composite reverberation chamber is equivalent to a full-wave darkroom; in the full reflection state, it is equivalent to a traditional reverberation chamber; a test turntable is arranged in the composite reverberation chamber and is used for bearing and adjusting the attitude of an equivalent scaled model of a vehicle to be tested; the single-probe millimeter wave measurement antenna is used for testing the wireless communication performance of the equivalent scaled model of the vehicle to be tested at a millimeter wave equivalent test frequency in the full-wave darkroom state, the reverberation chamber measurement antenna is used for testing the wireless communication performance of the equivalent scaled model of the vehicle to be tested at the millimeter wave equivalent test frequency in the reverberation chamber state, and the wireless communication performance test result of the vehicle to be tested is calculated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wireless communication testing, and in particular to a vehicle wireless communication performance testing device and method. BACKGROUND

[0002] This section is intended to provide background or context to the embodiments of the application recited in the claims. The description herein does not constitute admission that the prior art is prior art nor does it constitute an admission of any description in this section as prior art to an application described herein and / or in another application also owned by the applicant of the present application.

[0003] With the advent of autonomous vehicles and intelligent connected vehicles and the increasing popularity of in-vehicle infotainment devices, more and more vehicles begin to use wireless technology to achieve vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I), vehicle-to-pedestrian (V2P) and vehicle-to-network (V2N) connections. Under this technical trend, modern vehicles are increasingly like a wireless technology center integrating a series of in-vehicle wireless communication technologies and various transmission systems, and the demand for reliable communication links becomes urgent. Therefore, how to ensure the absolute reliability of wireless connection before the vehicle is put on the market is a crucial problem.

[0004] After the wireless communication antenna and module are installed on the vehicle, their performance is affected by the installation of the vehicle body and the actual use environment of the vehicle. The performance test results of the single-body antenna and module before installation cannot truly reflect the differences in the wireless communication performance of the vehicle after installation. Therefore, testing the wireless communication performance of the vehicle in the actual working environment of the vehicle to ensure that it meets the performance requirements in the real use environment is an indispensable link in the future testing of the wireless communication performance of the vehicle.

[0005] For testing the wireless communication performance of the vehicle, the existing scheme is to park the vehicle to be tested at the center of the turntable in the full-wave anechoic chamber, and use the traditional measurement antenna to perform spherical sampling (amplitude and phase) on the radiation characteristic parameters of the vehicle to be tested. Through the near-far field transformation, the far-field pattern of the vehicle-level antenna is obtained; through the direct far-field measurement, the vehicle-level wireless communication OTA performance index is obtained. For large-size test equipment at the vehicle level, the test scheme based on direct far field requires a test distance of hundreds of meters, which will result in a large anechoic chamber size and path loss, and a huge anechoic chamber construction cost and serious system dynamic range problem. The main disadvantage of the test scheme based on near-far field transformation is:

[0006] (1) Considering the size and weight of the vehicle, a relatively large anechoic chamber, turntable size and turntable bearing capacity are still needed. The size of the vehicle is usually about 5 meters, the near-field test distance required by this method is usually 3-4 meters, and the outer size of the anechoic chamber is not less than 12m x 12m x 15m. The construction cost of the anechoic chamber is high;

[0007] (2) Near-field test has high precision requirements for vehicle turntable and probe rocker arm / slide rail;

[0008] (3) For a large-size device to be tested at the vehicle level, only the sampling in the 0-100° angle range of the pitch plane can be met, and global sampling cannot be performed.

[0009] In addition, in the face of large-size devices to be tested at the vehicle level, the above-mentioned solutions all have the problem of extremely complex test arrangement, which requires a large amount of test preparation and implementation time, and the time cost is high.

[0010] On the other hand, as a typical electromagnetic characteristic measurement site, the reverberation chamber has the unique advantages of high space utilization, good test repeatability and stability, fast test speed, and the ability to excite a strong electromagnetic field with a small power. With the rapid development of wireless communication technology, it has been widely used in the wireless communication performance measurement of 2 / 3 / 4 / 5G, WIFI, Bluetooth, etc. system wireless communication terminal, AP, base station, as well as the electromagnetic compatibility measurement in the fields of smart home appliances, automobiles and parts, medical equipment, industrial equipment, large electronic systems, especially military electronic products. However, the existing reverberation chamber scheme cannot meet the demand of intelligent connected vehicle wireless communication performance measurement, and the main shortcomings are:

[0011] (1) The reverberation chamber can realize the rapid measurement of global area integral characteristics such as TRP / TIS by generating a statistically uniform, randomly polarized, isotropic electromagnetic field multipath environment in the test environment. However, it is powerless for the radiation characteristics near the horizontal plane and part of the spherical area integral characteristics of the intelligent connected vehicle, as well as the directional test indicators such as EIRP / EIS;

[0012] (2) For large-size test equipment of intelligent connected vehicles, considering the size and weight of the whole vehicle, a relatively large darkroom, turntable size and turntable bearing capacity are still needed.

[0013] In summary, there is an urgent need for a technical solution that can overcome the above-mentioned defects and improve the test of the whole vehicle wireless communication performance. SUMMARY

[0014] To solve the problems existing in the prior art, the present application provides a whole vehicle wireless communication performance test device and method. The present application combines the advantages of full-wave darkroom and reverberation chamber, measures the wireless communication performance of the equivalent scaled-down model of the vehicle to be tested at the millimeter wave equivalent test frequency, and calculates the whole vehicle wireless communication performance of the vehicle to be tested at the real working frequency.

[0015] In a first aspect of the embodiments of the present application, a vehicle wireless communication performance testing device is provided, comprising: a composite reverberation chamber, a mode stirring plate, an electromagnetic regulation superstructure surface, a test turntable, a single-probe millimeter wave measurement antenna and a reverberation chamber measurement antenna; wherein,

[0016] The single-probe millimeter wave measurement antenna, the reverberation chamber measurement antenna and the mode stirring plate are arranged in the composite reverberation chamber, and the electromagnetic regulation superstructure surface is mounted on the inner surface of the composite reverberation chamber and the surface of the mode stirring plate;

[0017] The electromagnetic regulation superstructure surface is used to fully absorb or fully reflect incident electromagnetic waves by adjusting the working state; in the full absorption state, the composite reverberation chamber is equivalent to a full electromagnetic darkroom; in the full reflection state, the composite reverberation chamber is equivalent to a traditional reverberation chamber;

[0018] The test turntable is arranged in the composite reverberation chamber and is used to carry and drive the equivalent scaled model of the vehicle to be tested to rotate, so as to adjust the attitude of the equivalent scaled model of the vehicle to be tested;

[0019] The single-probe millimeter wave measurement antenna is used to test the wireless communication performance of the equivalent scaled model of the vehicle to be tested in different attitudes at a millimeter wave equivalent test frequency in the full electromagnetic darkroom state, and the wireless communication performance test result of the vehicle to be tested is calculated;

[0020] The reverberation chamber measurement antenna is used to test the wireless communication performance of the equivalent scaled model of the vehicle to be tested at a millimeter wave equivalent test frequency in the reverberation chamber state, and the wireless communication performance test result of the vehicle to be tested is calculated.

[0021] In a second aspect of the embodiments of the present application, a vehicle wireless communication performance testing method is provided, which is executed based on the vehicle wireless communication performance testing device; comprising:

[0022] The working state of the electromagnetic regulation superstructure surface is adjusted, so that the composite reverberation chamber is equivalent to a full electromagnetic darkroom, or the composite reverberation chamber is equivalent to a traditional reverberation chamber;

[0023] The attitude of the equivalent scaled model of the vehicle to be tested is adjusted;

[0024] The wireless communication performance of the equivalent scaled model of the vehicle to be tested is tested at a millimeter wave equivalent test frequency in the full electromagnetic darkroom state or the reverberation chamber state, and the wireless communication performance test result of the vehicle to be tested is calculated.

[0025] In a third aspect of the embodiments of the present application, a computer device is provided, comprising a memory, a processor and a computer program stored in the memory and executable on the processor, and the processor implements the vehicle wireless communication performance testing method when executing the computer program.

[0026] In a fourth aspect of the embodiments of the present application, a computer readable storage medium is provided, which stores a computer program. The computer program is executed by a processor to implement the whole vehicle wireless communication performance testing method.

[0027] In a fifth aspect of the embodiments of the present application, a computer program product is provided, which comprises a computer program. The computer program is executed by a processor to implement the whole vehicle wireless communication performance testing method.

[0028] The whole vehicle wireless communication performance testing device and method provided by the present application combines the advantages of the anechoic chamber and the reverberation chamber, measures the wireless communication performance of the equivalent scaled-down model of the vehicle to be tested at the equivalent test frequency of millimeter wave, and calculates the whole vehicle wireless communication performance of the vehicle to be tested at the real working frequency. The testing device built by the present application has low cost, is convenient to build and operate, has good sampling effect, covers a wide range of testing indexes, and has strong versatility, thereby providing favorable hardware support and technical support for the testing of the whole vehicle wireless communication performance. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0030] Figure 1A is the architecture schematic diagram of the whole vehicle wireless communication performance testing device in the anechoic chamber state of an embodiment of the present application.

[0031] Figure 1B is the architecture schematic diagram of the whole vehicle wireless communication performance testing device in the reverberation chamber state of an embodiment of the present application.

[0032] Figure 2 is the flow schematic diagram of the whole vehicle wireless communication performance testing method of an embodiment of the present application.

[0033] Figure 3 is the structure schematic diagram of the computer device of an embodiment of the present application. DETAILED DESCRIPTION

[0034] The principles and spirits of the present application will be described below with reference to a number of exemplary embodiments. It should be understood that the embodiments are given only so that those skilled in the art can better understand and implement the present application, and are not intended to limit the scope of the present application in any way. On the contrary, the embodiments are provided so that the present disclosure is more thorough and complete, and the scope of the present disclosure is fully conveyed to those skilled in the art.

[0035] Those skilled in the art will appreciate that the embodiments of the present application can be implemented as a system, device, apparatus, method or computer program product. Therefore, the present disclosure can be embodied in the form of a complete hardware, complete software (including firmware, resident software, microcode, etc.), or a combination of hardware and software.

[0036] According to the embodiments of the present application, a whole vehicle wireless communication performance testing device and method are provided, which relate to the technical field of wireless communication testing.

[0037] The principles and spirits of the present application will be described below with reference to a number of exemplary embodiments. It should be understood that the embodiments are given only so that those skilled in the art can better understand and implement the present application, and are not intended to limit the scope of the present application in any way. On the contrary, the embodiments are provided so that the present disclosure is more thorough and complete, and the scope of the present disclosure is fully conveyed to those skilled in the art.

[0038] Figure 1A is a schematic diagram of the architecture of a whole vehicle wireless communication performance testing device in a full-wave anechoic chamber according to an embodiment of the present application.

[0039] Figure 1B is a schematic diagram of the architecture of a whole vehicle wireless communication performance testing device in a reverberation chamber according to an embodiment of the present application.

[0040] As shown in Figure 1A and Figure 1B , the device comprises a composite reverberation chamber 110, a mode stirring plate 120, an electromagnetic regulation metasurface 130, a test turntable 140, a single-probe millimeter wave measurement antenna 150, and a reverberation chamber measurement antenna 160; wherein,

[0041] The single-probe millimeter wave measurement antenna 150 is directed at an equivalent scaled-down model 170 of a vehicle under test on the test turntable 140, and its axis extension line passes through the origin of the test system coordinate system; the reverberation chamber measurement antenna 160 is arranged on the side wall of the composite reverberation chamber 110.

[0042] The electromagnetic regulation metasurface 130 is installed on the inner surface of the composite reverberation chamber 110 and the surface of the mode stirring plate 120.

[0043] The electromagnetic regulation superstructure 130 is used for full absorption or full reflection of incident electromagnetic waves by adjusting the working state; in the full absorption state, the composite reverberation chamber 110 is equivalent to a full electric wave darkroom; in the full reflection state, the composite reverberation chamber 110 is equivalent to a traditional reverberation chamber.

[0044] Specifically, by adjusting the state of the electromagnetic regulation superstructure, full absorption or full reflection of incident electromagnetic waves can be achieved.

[0045] For incident electromagnetic waves, the full absorption state can provide sufficient reflection attenuation, equivalent to a full electric wave darkroom.

[0046] The full reflection state has very small absorption loss and can create a low-absorption isotropic multipath environment in the test area, equivalent to a traditional reverberation chamber.

[0047] The test turntable 140 is arranged in the composite reverberation chamber 110 and is used for carrying and driving the equivalent scaled model 170 of the vehicle to be tested to rotate and adjust the attitude of the equivalent scaled model 170 of the vehicle to be tested.

[0048] The single-probe millimeter wave measurement antenna 150 is used for testing the wireless communication performance of the equivalent scaled model 170 of the vehicle to be tested in different attitudes at a millimeter wave equivalent test frequency in the full electric wave darkroom state, and calculating the wireless communication performance test result of the vehicle to be tested.

[0049] The reverberation chamber measurement antenna 160 is used for testing the wireless communication performance of the equivalent scaled model 170 of the vehicle to be tested at a millimeter wave equivalent test frequency in the reverberation chamber state, and calculating the wireless communication performance test result of the vehicle to be tested.

[0050] In an embodiment, the equivalent scaled model of the vehicle to be tested is obtained by reducing the size of the vehicle to be tested and the vehicle-mounted antenna by a ratio of 5. During testing, the equivalent scaled model of the vehicle to be tested is installed on the test turntable, and the wireless communication performance of the equivalent scaled model of the vehicle to be tested is measured at a millimeter wave equivalent test frequency, and the whole vehicle wireless communication performance of the vehicle to be tested at a real working frequency is calculated.

[0051] In an embodiment, the millimeter wave equivalent test frequency corresponds to the size of the equivalent scaled model of the vehicle to be tested, and is obtained by using the following relationship:

[0052]

[0053] wherein f M is the millimeter wave equivalent test frequency, S M is the size of the equivalent scaled model of the vehicle to be tested; f F is the working frequency of the vehicle-mounted wireless communication module of the vehicle to be tested, and S FThe real size of the to-be-tested vehicle is obtained.

[0054] In an actual application scenario, the to-be-tested vehicle has a length of 5 m, and the vehicle-mounted wireless communication module operates at a frequency of 1 GHz.

[0055] When the millimeter wave equivalent test frequency is set to 25 GHz, the size of the equivalent scaled-down model of the whole vehicle is reduced to 0.2 m.

[0056] The equivalent scaled-down model of the to-be-tested vehicle with a length of 0.2 m is tested at the millimeter wave equivalent test frequency of 25 GHz, and the wireless communication performance index (1 GHz) of the real to-be-tested vehicle (length 5 m) is calculated. Through the above method, the requirements for the size and construction cost of the test anechoic chamber can be greatly reduced.

[0057] In an embodiment, the millimeter wave equivalent test frequency is not less than 20 GHz and not more than 60 GHz. The test frequency in the above range is selected mainly considering the size of the anechoic chamber and the implementation of the device.

[0058] In an embodiment, the center point of the test turntable is taken as the origin of the test device coordinate system, a plane parallel to the ground is taken as the XY plane, and an axis perpendicular to the XY plane and pointing upward is taken as the positive direction of the Z axis. The test device coordinate system is established. For this purpose, the test turntable is used to switch between the combined shaft and the distributed shaft in the state of the composite reverberation chamber.

[0059] Through the free switching of the test turntable state, the rotation requirements of the equivalent scaled-down model of the to-be-tested vehicle in different test states can be met.

[0060] In the full-wave anechoic chamber state, the test turntable is switched to the combined shaft turntable, so that the equivalent scaled-down model of the to-be-tested vehicle is rotated in three dimensions.

[0061] In the reverberation chamber state, the test turntable is switched to the distributed shaft turntable, so that the equivalent scaled-down model of the to-be-tested vehicle is rotated in two dimensions in the horizontal plane.

[0062] As shown in Figure 1A the low-dielectric-constant combined shaft turntable in the full-wave anechoic chamber state can realize three-dimensional rotation (theta: 0-180°, phi: 0-360°) of the equivalent scaled-down model of the to-be-tested vehicle.

[0063] As shown in Figure 1B the low-dielectric-constant distributed shaft turntable in the reverberation chamber state can realize two-dimensional rotation (phi: 0-360°) of the equivalent scaled-down model of the to-be-tested vehicle in the horizontal plane.

[0064] For example, the test turntable can be a multi-axis turntable with at least three axes, capable of rotating in azimuth and pitch, raising and lowering in height, and precisely adjusting the horizontal mounting position.

[0065] In one embodiment, the adjustment methods of the electromagnetically controlled metasurface include at least: voltage control adjustment, light-controlled sensing adjustment, and resistance control adjustment.

[0066] Light-controlled sensing modulation adjusts the working state of the electromagnetically controlled metasurface by changing the light intensity in different areas of the reverberation chamber.

[0067] In one embodiment, in a fully anechoic chamber, the wireless communication performance of the equivalent scaled-down model of the vehicle under test is tested at the millimeter-wave equivalent test frequency using the single-probe millimeter-wave measurement antenna and the combined axis turntable.

[0068] The testing methods include at least the following:

[0069] The passive antenna pattern, active radiated power, and receiver sensitivity characteristics were tested using a single-probe direct far-field test method; the passive antenna pattern characteristics were tested using a single-probe spherical near-field test method.

[0070] In one embodiment, in a reverberation chamber state, the reverberation chamber measuring antenna and the distributed axis turntable are used to test the wireless communication performance of the equivalent scaled-down model of the vehicle under test at the millimeter-wave equivalent test frequency using the reverberation chamber method.

[0071] The testing methods include at least the following:

[0072] Passive antenna efficiency testing, conducted parameter testing (S11, return loss), global area classification characteristic index testing such as TRP (total radiated power) / TIS (total isotropic sensitivity).

[0073] In one embodiment, the total absorption state includes at least a first absorption state and a second absorption state;

[0074] For the electromagnetically controlled metasurface mounted on the stirring template, the side facing the single-probe millimeter-wave measurement antenna is in the first absorption state when in full absorption; the side facing away from the single-probe millimeter-wave measurement antenna is in the second absorption state when in full absorption.

[0075] like Figure 1A and Figure 1B As shown, the stirring template is located on the right side of the compound reverberation chamber. The left side of the stirring template faces the single-probe millimeter-wave measurement antenna, and the right side faces away from the single-probe millimeter-wave measurement antenna. These two sides adopt different absorption states during the test.

[0076] In an embodiment, in the first absorption state, the absorption attenuation of electromagnetic waves is greater than 35 dB for an incident angle of ±20°;

[0077] In the second absorption state, the absorption attenuation of electromagnetic waves is greater than 20 dB for an incident angle of ±45°;

[0078] The first absorption state and the second absorption state are adjusted by changing the control signal, so that the switching of different absorption states can be realized, and thus the electromagnetic regulation superstructure surface of the inner surface of the composite reverberation chamber and the surface of the mode stirring plate does not need to be reinstalled.

[0079] The present application realizes the whole vehicle wireless communication performance test through the composite reverberation chamber, which combines the characteristics of the full-wave darkroom and the reverberation chamber.

[0080] Specifically, by adjusting the state of the electromagnetic regulation superstructure surface installed on the inner surface of the reverberation chamber and the surface of the mode stirring plate, the present application can realize full absorption and full reflection of incident electromagnetic waves respectively. The full absorption state can provide sufficient reflection attenuation for the incident electromagnetic waves, which is equivalent to a full-wave darkroom; the full reflection state has little absorption loss for the incident electromagnetic waves, which can create a low-absorption isotropic multipath environment in the test area, which is equivalent to a traditional reverberation chamber. The wireless communication performance of the equivalent scaled model of the vehicle to be tested is tested at the equivalent test frequency of millimeter waves, and the whole vehicle wireless communication performance of the vehicle to be tested at the real working frequency is calculated.

[0081] It should be noted that although several modules of the whole vehicle wireless communication performance test device are mentioned in the foregoing detailed description, such division is merely exemplary and not mandatory. In fact, according to the embodiments of the present application, the features and functions of two or more modules described above can be embodied in one module. Conversely, the features and functions of one module described above can be further divided into multiple modules.

[0082] After introducing the device of the exemplary embodiments of the present application, next, the whole vehicle wireless communication performance test method of the exemplary embodiments of the present application is introduced with reference to Figure 2 The whole vehicle wireless communication performance test method of the exemplary embodiments of the present application is introduced.

[0083] The implementation of the whole vehicle wireless communication performance test method can refer to the implementation of the above method, and the repeated parts will not be described again. Based on the same inventive concept, the present application also proposes a whole vehicle wireless communication performance test method, as shown in Figure 2 The method comprises:

[0084] S1, by adjusting the working state of the electromagnetic regulation superstructure surface, the composite reverberation chamber is equivalent to a full-wave darkroom, or the composite reverberation chamber is equivalent to a traditional reverberation chamber;

[0085] S2, adjust the posture of the equivalent scaled model of the to-be-tested vehicle;

[0086] S3, test the wireless communication performance of the equivalent scaled model of the to-be-tested vehicle at the millimeter wave equivalent test frequency in the full anechoic chamber state or the reverberation chamber state, and calculate the wireless communication performance test result of the to-be-tested vehicle.

[0087] It should be noted that although the operations of the method of the present application are described in a specific order in the above embodiments and drawings, this does not require or imply that the operations must be performed in this specific order, or that all of the shown operations must be performed to achieve the desired result. Additionally or alternatively, certain steps can be omitted, multiple steps can be combined into one step, and / or one step can be divided into multiple steps.

[0088] Based on the foregoing inventive concept, as shown in Figure 3 The present application also proposes a computer device 300, which comprises a memory 310, a processor 320, and a computer program 330 stored in the memory 310 and executable on the processor 320, wherein the processor 320 implements the foregoing vehicle wireless communication performance test method when executing the computer program 330.

[0089] Based on the foregoing inventive concept, the present application proposes a computer readable storage medium, which stores a computer program, wherein the computer program is executed by a processor to implement the foregoing vehicle wireless communication performance test method.

[0090] Based on the foregoing inventive concept, the present application proposes a computer program product, which comprises a computer program, wherein the computer program is executed by a processor to implement the vehicle wireless communication performance test method.

[0091] The vehicle wireless communication performance test device and method proposed by the present application combine the advantages of the full anechoic chamber and the reverberation chamber, measure the wireless communication performance of the equivalent scaled model of the to-be-tested vehicle at the millimeter wave equivalent test frequency, and calculate the vehicle wireless communication performance of the to-be-tested vehicle at the real working frequency. The test device built by the present application has low cost, is convenient to build and operate, has good sampling effect, covers a wide range of test indexes, and has strong universality, thereby providing favorable hardware support and technical support for the test of the vehicle wireless communication performance.

[0092] In the technical solution of the present application, the acquisition, storage, use, processing, etc. of data all comply with the relevant provisions of national laws and regulations.

[0093] Those skilled in the art will appreciate that embodiments of the present application can be readily used as a method, apparatus, or computer program product. Accordingly, the present application can take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application can take the form of a computer program product on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROMs, optical storage devices, etc.) embodying computer readable program code.

[0094] The present application is described in reference to the flowchart illustrations and / or block diagrams of methods and computer program products according to embodiments of the application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processing machine, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart illustrations and / or block diagrams block or blocks.

[0095] These computer program instructions can also be stored in a computer- readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instructions which implement the function specified in the flowchart illustrations and / or block diagrams block or blocks.

[0096] These computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart illustrations and / or block diagrams block or blocks.

[0097] Finally, it should be noted that the above-described embodiments are merely specific embodiments of the present application, which are used to illustrate the technical solutions of the present application, but not to limit the same. The protection scope of the present application is not limited thereto. Although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that any person skilled in the art can still modify or easily think of changes to the technical solutions recorded in the foregoing embodiments, or make equivalent replacements to some of the technical features, within the technical scope disclosed by the present application. The modifications, changes or replacements do not cause the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A vehicle wireless communication performance testing device, characterized in that, include: The system includes a composite reverberation chamber, a stirring template, an electromagnetically controlled metasurface, a test turntable, a single-probe millimeter-wave measurement antenna, and a reverberation chamber measurement antenna; among these components... The composite reverberation chamber is equipped with the stirring template, a single-probe millimeter-wave measurement antenna, and a reverberation chamber measurement antenna. The electromagnetically modulated metamaterial surfaces are respectively installed on the inner surface of the composite reverberation chamber and the surface of the stirring template. The electromagnetically modulated metasurface is used to achieve total absorption or total reflection of incident electromagnetic waves by adjusting its working state; in the state of total absorption, the composite reverberation chamber is equivalent to a completely anechoic chamber; in the state of total reflection, the composite reverberation chamber is equivalent to a conventional reverberation chamber. The test turntable is set in the composite reverberation chamber and is used to support and drive the equivalent scale model of the vehicle under test to rotate, thereby adjusting the attitude of the equivalent scale model of the vehicle under test. The single-probe millimeter-wave measurement antenna is used to test the wireless communication performance of the equivalent scaled-down model of the vehicle under test in different postures under the conditions of a fully anechoic chamber and at the millimeter-wave equivalent test frequency, and to calculate the wireless communication performance test results of the vehicle under test. The reverberation chamber measurement antenna is used to test the wireless communication performance of the equivalent scaled-down model of the vehicle under test in the reverberation chamber state at the millimeter-wave equivalent test frequency, and to calculate the wireless communication performance test results of the vehicle under test.

2. The apparatus according to claim 1, characterized in that, The equivalent scaled-down model of the vehicle under test is obtained by proportionally reducing the size of the vehicle under test and the vehicle-mounted antenna.

3. The apparatus according to claim 2, characterized in that, The millimeter-wave equivalent test frequency corresponds to the size of the equivalent scaled-down model of the vehicle under test, and is obtained using the following relationship: Among them, f M For millimeter wave equivalent test frequency, S M f represents the dimensions of the equivalent scaled-down model of the vehicle under test; F S is the operating frequency of the vehicle-mounted wireless communication module of the vehicle under test. F The actual dimensions of the vehicle under test.

4. The apparatus according to claim 3, characterized in that, The millimeter-wave equivalent test frequency shall be no less than 20 GHz and no more than 60 GHz.

5. The apparatus according to claim 3, characterized in that, The test turntable is used to switch between two states, namely combined axis and distributed axis, according to the state of the compound reverberation chamber. In a fully anechoic chamber, the test turntable is switched to a combined axis turntable, which allows the equivalent scaled-down model of the vehicle under test to rotate in three dimensions. In the reverberation chamber state, the test turntable is switched to a distributed axis turntable, so that the equivalent scale model of the vehicle under test is rotated in two dimensions on the horizontal plane.

6. The apparatus according to claim 1, characterized in that, The adjustment methods of the electromagnetically controlled metasurface include at least: voltage control adjustment, light-controlled sensing adjustment, and resistance control adjustment.

7. The apparatus according to claim 5, characterized in that, In a fully anechoic chamber, the wireless communication performance of the equivalent scaled-down model of the vehicle under test is tested at the millimeter-wave equivalent test frequency using the single-probe millimeter-wave measurement antenna and the combined axis turntable. The testing methods include at least the following: The passive antenna pattern, active radiated power, and receiver sensitivity characteristics were tested using a single-probe direct far-field test method; the passive antenna pattern characteristics were tested using a single-probe spherical near-field test method.

8. The apparatus according to claim 5, characterized in that, In the reverberation chamber state, the wireless communication performance of the equivalent scaled model of the vehicle under test is tested using the reverberation chamber measurement antenna and the distributed axis turntable at the millimeter wave equivalent test frequency using the reverberation chamber method. The testing methods include at least the following: Passive antenna efficiency testing, conducted parameter testing, global area classification radiated power and receiver sensitivity testing.

9. The apparatus according to claim 1, characterized in that, The total absorption state includes at least: a first absorption state and a second absorption state; For the electromagnetically controlled metasurface mounted on the stirring template, the side facing the single-probe millimeter-wave measurement antenna is in the first absorption state when in full absorption; the side facing away from the single-probe millimeter-wave measurement antenna is in the second absorption state when in full absorption. In the first absorption state, for an incident angle of ±20°, the absorption attenuation of electromagnetic waves is greater than 35dB. In the second absorption state, for an incident angle of ±45°, the absorption attenuation of electromagnetic waves is greater than 20dB. The first absorption state and the second absorption state are adjusted by changing the control signal.

10. A method for testing the wireless communication performance of a vehicle, characterized in that, This method is performed using the vehicle wireless communication performance testing apparatus according to any one of claims 1-9; comprising: By adjusting the operating state of the electromagnetically controlled metasurface, the composite reverberation chamber can be made equivalent to a completely anechoic chamber, or This makes the composite reverberation chamber equivalent to a traditional reverberation chamber; Adjust the attitude of the equivalent scaled-down model of the vehicle under test; In a fully anechoic chamber or reverberation chamber, the wireless communication performance of the equivalent scaled-down model of the vehicle under test is tested at the millimeter-wave equivalent test frequency, and the test results of the wireless communication performance of the vehicle under test are calculated.

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