CN115173968A - Intelligent networking automobile wireless communication performance test system - Google Patents
Intelligent networking automobile wireless communication performance test system Download PDFInfo
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- CN115173968A CN115173968A CN202210865582.4A CN202210865582A CN115173968A CN 115173968 A CN115173968 A CN 115173968A CN 202210865582 A CN202210865582 A CN 202210865582A CN 115173968 A CN115173968 A CN 115173968A
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- 238000004088 simulation Methods 0.000 claims abstract description 13
- 238000005070 sampling Methods 0.000 claims abstract description 6
- 239000011358 absorbing material Substances 0.000 claims abstract description 5
- 239000004568 cement Substances 0.000 claims description 4
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/10—Monitoring; Testing of transmitters
- H04B17/15—Performance testing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/20—Monitoring; Testing of receivers
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Abstract
The invention discloses an intelligent networking automobile wireless communication performance test system, which comprises: wave absorbing materials are laid in the microwave darkroom and used for eliminating the reflection of wireless signals; the mechanical rocker arm is used for driving the measuring antenna to move along a preset track, and performing spherical surface test on the equivalent scaling model of the vehicle to be tested according to a preset sampling radius; the electromagnetic environment simulation material is laid on the ground of a darkroom and used for constructing an electromagnetic characteristic equivalent scaling model of the real use environment of the vehicle and bearing the equivalent scaling model of the vehicle to be tested; the vehicle turntable bears and drives the equivalent scaling model of the vehicle to be tested and the electromagnetic environment simulation material to rotate on the horizontal plane; based on the scene, the wireless communication performance test is carried out on the equivalent scaling model of the vehicle to be tested under the equivalent test frequency, and the wireless communication performance index of the real vehicle to be tested is obtained. The invention considers the electromagnetic characteristics of various real use environments of the vehicle to be tested, greatly reduces the darkroom construction cost and the complexity of test scene arrangement, and improves the test efficiency.
Description
Technical Field
The invention relates to the technical field of wireless communication performance testing, in particular to an intelligent networking automobile wireless communication performance testing system.
Background
This section is intended to provide a background or context to the embodiments of the invention that are recited in the claims. The description herein is not admitted to be prior art by inclusion in this section.
With the advent of autonomous vehicles and intelligent networked vehicles and the increasing popularity of vehicle-mounted infotainment devices, more and more vehicles are beginning to use wireless technology to implement vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I), vehicle-to-pedestrian (V2P) and vehicle-to-network (V2N) connections in large numbers. With this technical trend, modern automobiles are becoming more and more like a wireless technology center integrating a series of on-board wireless communication technologies and various transmission systems, and the demand for reliable communication links is becoming urgent. Therefore, how to ensure the absolute reliability of the wireless connection before the vehicle is put on the market is a crucial issue.
After the wireless communication antenna and the wireless communication module are loaded, the performance of the wireless communication antenna and the wireless communication module is influenced by the actual use environment of the vehicle body and the whole vehicle. The performance test results of the single-body-level antenna and the module before loading cannot truly reflect the difference of the wireless communication performance of the whole vehicle after loading. Therefore, the wireless communication performance of the vehicle is tested in the actual working environment of the whole vehicle to ensure that the wireless communication performance meets the requirements of various performance indexes in the real use environment, and the wireless communication performance testing method is an essential link in the future wireless communication performance testing of the whole vehicle.
For the test of the wireless communication performance of the whole vehicle, the existing scheme is to park the vehicle to be tested in the center of a turntable in a full-electric wave darkroom, and use a measuring antenna to perform spherical sampling (amplitude and phase) on the radiation parameters of the vehicle to be tested. And obtaining a far-field directional diagram of the vehicle-mounted antenna of the whole vehicle level to be measured in a near-far field conversion mode, and obtaining the OTA performance index of the wireless communication of the whole vehicle level in a far-field direct measurement mode. As a free space test scheme, the scheme has higher test precision and test consistency for the whole vehicle-level wireless communication performance test, and has satisfactory test efficiency. The main disadvantage of the scheme is that the influence of the actual use environment including the road surface, surrounding buildings, other vehicles and the like on the wireless communication performance of the vehicle to be tested is not considered. The automobile is used as a road traffic participant, and a free space use scene does not exist, so the test result cannot represent the real whole automobile wireless communication performance of the vehicle to be tested.
In another prior art, a bottom material simulating various real-use ground electromagnetic characteristics is laid on the ground of a darkroom, so as to simulate the real use scene of a vehicle on a road surface. The scheme considers the influence of the road surface condition on the wireless communication performance of the whole vehicle to a certain extent. The limitation of this solution is that the pavement simulation material is not laid over a large area, limited only around the vehicle body, considering the size and weight of the vehicle to be tested and the pavement simulation material, and the carrying capacity of the turntable. However, in real road driving environments, the coupling and reflection of wireless signals never originates from only a small portion of the ground surrounding the vehicle. But from road surfaces in the range of tens of meters or even tens of meters around, surrounding buildings, and other traffic participants such as vehicles and street lamps. Therefore, the wireless communication performance of the vehicle under test must be measured in the reconstructed simulated real use environment. For the whole-vehicle-level wireless communication performance test of the vehicle to be tested, the test cannot be performed in a darkroom anyway.
Disclosure of Invention
The embodiment of the invention provides an intelligent networking automobile wireless communication performance test system, which comprises: the system comprises a microwave darkroom, a mechanical rocker arm, an electromagnetic environment simulation material and a vehicle turntable, wherein the mechanical rocker arm is positioned in the microwave darkroom and is provided with a measuring antenna;
wave absorbing materials are laid on the four side walls and the upper surface of the top of the anechoic chamber and used for eliminating the reflection of wireless signals;
mechanical rockers fitted with measuring antennas are used: driving the measuring antenna to move along a preset track, and performing spherical surface test on the equivalent scaling model of the vehicle to be tested according to a preset sampling radius;
the electromagnetic environment simulation material is laid on the ground of the darkroom and used for simulating a real use scene of the vehicle, constructing an electromagnetic characteristic equivalent scaling model of the real use environment of the vehicle and bearing the equivalent scaling model of the vehicle to be tested;
the vehicle turntable is used for bearing and driving the equivalent scaling model of the vehicle to be tested and the electromagnetic environment simulation material to rotate on the horizontal plane;
based on the scene, the wireless communication performance test is carried out on the equivalent scaling model of the vehicle to be tested under the equivalent test frequency, and the wireless communication performance index of the real vehicle to be tested is obtained.
The invention considers the electromagnetic characteristics of various real use environments of the vehicle to be tested, greatly reduces the darkroom construction cost and the complexity of test scene arrangement, and improves the test efficiency.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts. In the drawings:
FIG. 1 is a schematic structural diagram of an intelligent networking automobile wireless communication performance test system in an embodiment of the invention;
FIG. 2 is a first schematic diagram of an electromagnetic characteristic equivalent scaling model of a real vehicle use environment of the intelligent networked automobile wireless communication performance test system in the embodiment of the invention;
fig. 3 is a schematic diagram of an electromagnetic characteristic equivalent scaling model of a real vehicle using environment of the intelligent networking automobile wireless communication performance testing system in the embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings. The exemplary embodiments and descriptions of the present invention are provided to explain the present invention, but not to limit the present invention.
In the description of the present specification, the terms "comprising," "including," "having," "containing," and the like are used in an open-ended fashion, i.e., to mean including but not limited to. Reference to the description of the terms "one embodiment," "a particular embodiment," "some embodiments," "for example," etc., means that a particular feature, structure, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. The sequence of steps involved in the various embodiments is provided to illustrate the practice of the present application, and the sequence of steps is not limited thereto and can be adjusted as needed.
Fig. 1 is a schematic structural diagram of an intelligent networking automobile wireless communication performance test system in an embodiment of the present invention, and as shown in fig. 1, the intelligent networking automobile wireless communication performance test system includes: the system comprises a microwave darkroom, a mechanical rocker arm which is positioned in the microwave darkroom and is provided with a measuring antenna, an electromagnetic environment simulation material and a vehicle turntable;
wave absorbing materials are laid on four side walls and the upper surface of the top of the interior of the anechoic chamber and are used for eliminating the reflection of wireless signals;
mechanical rockers fitted with measuring antennas are used: driving the measuring antenna to move along a preset track, and performing spherical surface test on the equivalent scaling model of the vehicle to be tested according to a preset sampling radius;
the electromagnetic environment simulation material is laid on the ground of the darkroom and used for simulating a real use scene of the vehicle, constructing an electromagnetic characteristic equivalent scaling model of the real use environment of the vehicle and bearing the equivalent scaling model of the vehicle to be tested;
the vehicle turntable is used for bearing and driving the equivalent scaling model of the vehicle to be tested and the electromagnetic environment simulation material to rotate on the horizontal plane;
based on the scene, the wireless communication performance test is carried out on the equivalent scaling model of the vehicle to be tested under the equivalent test frequency, and the wireless communication performance index of the real vehicle to be tested is obtained.
Specifically, wave absorbing materials are laid on four side walls and the upper surface of the top of the microwave anechoic chamber.
The equivalent scaling model of the vehicle to be tested is obtained by scaling down the sizes of the vehicle to be tested and the vehicle-mounted antenna in equal proportion.
The invention considers the electromagnetic characteristics of various real use environments of the vehicle to be tested, greatly reduces the darkroom construction cost and the complexity of test scene arrangement, and improves the test efficiency.
In the embodiment of the present invention, the selection of the equivalent test frequency, the frequency and the equivalent scaling model size is based on the following relation:
wherein f is M For equivalent test frequency, S M The size of the equivalent scaling model of the vehicle to be measured; f. of F For the true working frequency, S, of the vehicle-mounted wireless communication antenna of the vehicle to be tested F The actual size of the vehicle to be measured. For example, for a vehicle to be tested with a length of 5m, the vehicle-mounted wireless communication module works in a 1GHz frequency band, and when the equivalent test frequency is set to 25GHz, the equivalent scaling model size of the whole vehicle is reduced to 0.2m. And measuring the equivalent scaling model of the vehicle to be tested with the length of 0.2m under the equivalent test frequency of 25GHz, and calculating to obtain the wireless communication performance index (1 GHz) of the real vehicle to be tested (with the length of 5 m). Greatly reducing the requirements on testing darkroom site space and construction cost.
Specifically, the selection of the equivalent test frequency is not lower than 25GHz.
In particular, f M /f F The ratio of (A) to (B) is not less than 8.
In the embodiment of the present invention, the selection of the scaling factor of the electromagnetic characteristic equivalent scaling model of the real use environment of the vehicle is consistent with the scaling factor of the test frequency, that is:
wherein f is M For equivalent test frequency, f F The real working frequency of the vehicle-mounted wireless communication antenna of the vehicle to be detected; d F For the actual environment size of the vehicle to be measured, D M And equivalent scaling model size of the electromagnetic characteristic of the real use environment of the vehicle to be measured. For example, for a real use environment of a vehicle to be tested of 100m × 100m, the vehicle-mounted wireless communication module works in a 1GHz frequency band, and when the equivalent test frequency is set to 25GHz, the electromagnetic characteristic equivalent scaling model size of the real use environment of the vehicle to be tested is 4m × 4m. Greatly reducing the requirements on the field size of the darkroom and the construction cost.
Specifically, as shown in fig. 2 and fig. 3, the electromagnetic characteristic equivalent scaling model of the real use environment of the vehicle includes a road surface equivalent scaling model, a surrounding building equivalent scaling model, and equivalent scaling models of road participants such as other vehicles and traffic lights.
Specifically, the real using environment area of the vehicle to be measured corresponding to the electromagnetic characteristic equivalent scaling model is not less than 50m × 50m.
Specifically, the road surface equivalent scaling model is made of any one of asphalt, sandy soil, cement and mixed road surface materials;
the material of the equivalent scaling model of the surrounding building is any one of cement, concrete and brick-concrete structure material.
The equivalent scaling models of the other vehicles, the traffic lights and other road participants are made of metal.
The electromagnetic characteristic equivalent scaling model further comprises a tree equivalent scaling model and a lawn equivalent scaling model, and the material of the tree equivalent scaling model is the same as that of the real use environment.
In the embodiment of the invention, the equivalent scaling model of the surrounding building takes into account the effective part of the shielding and reflection of the building on the wireless signal in the real use environment, and the height of the equivalent model is not more than 1m. Namely, the height of the equivalent scaling model of the surrounding building is reduced in an equal proportion according to the real height, and when the calculated height of the equivalent model is larger than 1m, the value is 1m.
In the embodiment of the present invention, the rotation range of the mechanical swing arm is 0 to 90 ° in the pitch plane, that is, the sampling range of the pitch plane of the measurement antenna is (0, 90 °).
In the embodiment of the present invention, the coordinate system of the test system is constructed as follows:
and taking the central point of the vehicle turntable as the origin of coordinates of the test system, taking a plane parallel to the ground as an XY plane, and taking an axis which is perpendicular to the XY plane and faces the upper part of the ground as a Z-axis forward direction.
Or taking any point on a straight line which is positioned at the center of the vehicle turntable and is vertical to the surface of the vehicle turntable as a coordinate origin of the test system, taking a plane parallel to the ground as an XY plane, and taking an axis which is vertical to the XY plane and faces upwards the ground as a Z-axis forward direction.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, 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 flow or flows and/or block diagram block or blocks.
These computer program instructions may 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 instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may 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 flow or flows and/or block diagram block or blocks.
The above-mentioned embodiments are provided to further explain the objects, technical solutions and advantages of the present invention in detail, and it should be understood that the above-mentioned embodiments are only examples of the present invention and should not be used to limit the scope of the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (13)
1. The utility model provides an intelligence networking car wireless communication capability test system which characterized in that includes: the system comprises a microwave darkroom, a mechanical rocker arm, an electromagnetic environment simulation material and a vehicle turntable, wherein the mechanical rocker arm is positioned in the microwave darkroom and is provided with a measuring antenna;
wave absorbing materials are laid on the four side walls and the upper surface of the top of the anechoic chamber and used for eliminating the reflection of wireless signals;
mechanical rocker arms fitted with measuring antennas are used: driving the measuring antenna to move along a preset track, and performing spherical surface test on the equivalent scaling model of the vehicle to be tested according to a preset sampling radius;
the electromagnetic environment simulation material is laid on the ground of the darkroom and used for simulating a real use scene of the vehicle, constructing an electromagnetic characteristic equivalent scaling model of the real use environment of the vehicle and bearing the equivalent scaling model of the vehicle to be tested;
the vehicle turntable is used for bearing and driving the equivalent scaling model of the vehicle to be tested and the electromagnetic environment simulation material to rotate on a horizontal plane;
based on the scene, the wireless communication performance test is carried out on the equivalent scaling model of the vehicle to be tested under the equivalent test frequency, and the wireless communication performance index of the real vehicle to be tested is obtained.
2. The intelligent networking automobile wireless communication performance test system of claim 1, wherein the equivalent test frequency is determined according to the following formula:
wherein f is M For equivalent test frequency, S M The size of the equivalent scaling model of the vehicle to be measured; f. of F True working frequency, S, of vehicle-mounted wireless communication antenna of vehicle to be tested F The actual size of the vehicle to be measured.
3. The system as claimed in claim 1, wherein the electromagnetic characteristic equivalent scaling model of the real usage environment of the vehicle includes a road surface equivalent scaling model, a surrounding building equivalent scaling model, and a road participant equivalent scaling model.
4. The system for testing wireless communication performance of the intelligent networked automobile according to claim 3, wherein the road equivalent scaling model is made of any one of asphalt, sandy soil, cement and mixed road material;
the material of the equivalent scaling model of the surrounding building is any one of cement, concrete and brick-concrete structure material;
the equivalent scaling model of the road participants is made of metal.
5. The system for testing wireless communication performance of an intelligent networked automobile according to claim 3, wherein the electromagnetic characteristic equivalent scaling model of the real use environment of the vehicle further comprises a tree equivalent scaling model and a lawn equivalent scaling model.
6. The system for testing wireless communication performance of intelligent networked automobiles according to claim 3, wherein the height of the equivalent scaling model of the surrounding building is not more than 1m.
7. The system for testing the wireless communication performance of the intelligent networked automobile according to claim 1, wherein the electromagnetic characteristic equivalent scaling model of the real use environment of the automobile is determined according to the following formula:
wherein f is M For equivalent test frequency, f F The real working frequency of the vehicle-mounted wireless communication antenna of the vehicle to be detected; d F For the actual environment size of the vehicle to be measured, D M And the size of the electromagnetic characteristic equivalent scaling model of the real use environment of the vehicle to be measured is obtained.
8. The system for testing the wireless communication performance of the intelligent networked automobile according to claim 1, wherein the equivalent test frequency is not lower than 25GHz.
9. The intelligent networking automobile wireless communication performance test system of claim 2 or 7, wherein f M f F The ratio of (A) to (B) is not less than 8.
10. The system for testing wireless communication performance of the intelligent networked automobile according to claim 1, wherein the area of the real use environment of the vehicle to be tested corresponding to the electromagnetic characteristic equivalent scaling model is not less than 50m x 50m.
11. The system for testing the wireless communication performance of the intelligent networked automobile according to claim 1, wherein the rotation range of the mechanical rocker arm is 0-90 degrees of a pitching plane.
12. The intelligent networked automobile wireless communication performance test system as claimed in claim 1, wherein the coordinate system of the test system is constructed as follows:
and taking the central point of the vehicle turntable as the origin of coordinates of the test system, taking a plane parallel to the ground as an XY plane, and taking an axis which is perpendicular to the XY plane and faces the upper part of the ground as a Z-axis forward direction.
13. The intelligent networked automobile wireless communication performance test system as claimed in claim 1, wherein the coordinate system of the test system is constructed as follows:
and taking any point on a straight line which is positioned at the center of the vehicle turntable and is vertical to the surface of the vehicle turntable as a coordinate origin of the test system, taking a plane parallel to the ground as an XY plane, and taking an axis which is vertical to the XY plane and faces upwards the ground as a Z-axis forward direction.
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