A signal shielding test system and test method for intelligent connected vehicles

Abstract

The present invention relates to a signal shielding test system and test method for intelligent networked vehicles, which comprises: a shell, a shielding layer is provided in the shell, the inner side of the shielding layer forms a tunnel, UWB positioning base stations are arranged at equal distances in the tunnel, and the UWB positioning base stations are used to broadcast their position coordinates and time in real time; a test vehicle, the test vehicle is equipped with a UWB positioning tag, and the UWB positioning tag is used to receive the position coordinates and time of the UWB positioning base station, and calculate the position information of the test vehicle according to the position coordinates and time of the UWB positioning base station. The present invention relates to a signal shielding test system and test method for intelligent networked vehicles, which can calculate the position information of the test vehicle without the need for satellite signals and wireless signals through the arranged UWB positioning base stations and UWB positioning tags.

Description

Technical Field

[0001] The present invention relates to the technical field of intelligent networked vehicle testing, and in particular to an intelligent networked vehicle signal shielding testing system and testing method. Background Art

[0002] At present, the driving of intelligent connected vehicles relies on GNSS satellite signals and RTK base station signals for high-precision positioning, and relies on LTE-V and 5G to achieve V2X communication for path planning and decision-making. In real driving environments, elevated roads, culverts, tunnels and other environments often block signals, which affects the positioning accuracy of the vehicle and the communication between the vehicle and the outside world, and ultimately affects the safety of the vehicle's autonomous driving. Therefore, in vehicle testing, creating a signal shielding scenario is of great significance for testing the functions and performance of intelligent connected vehicles when the signal is blocked.

[0003] In related technologies, one can generally find a real mountain tunnel and close the road, and then test the vehicle in the real tunnel. However, when testing in a real mountain tunnel, firstly, the approval cost of the road closure test is high, and secondly, the tunnel blocks the vehicle's satellite signals and communication signals. At the same time, the satellite positioning signals of the data acquisition and data acquisition equipment installed on the vehicle by the testing agency, as well as the communication signals with the outside world are also blocked, making it impossible to obtain accurate positioning information.

[0004] Therefore, it is necessary to design a new intelligent connected vehicle signal shielding test system and test method to overcome the above problems. Summary of the invention

[0005] The embodiments of the present invention provide a signal shielding test system and a test method for an intelligent connected vehicle, so as to solve the problems in the related art that the approval cost of road closure test is high, the signal is shielded, and accurate positioning information cannot be obtained.

[0006] In a first aspect, a signal shielding test system for an intelligent connected vehicle is provided, comprising: a shell, a shielding layer is provided in the shell, the inner side of the shielding layer forms a tunnel, UWB positioning base stations are arranged at equal distances in the tunnel, and the UWB positioning base stations are used to broadcast their position coordinates and time in real time; a test vehicle, the test vehicle is equipped with a UWB positioning tag, and the UWB positioning tag is used to receive the position coordinates and time of the UWB positioning base station, and calculate the position information of the test vehicle according to the position coordinates and time of the UWB positioning base station.

[0007] In some embodiments, the test vehicle is also equipped with a data acquisition device, which is connected to the UWB positioning tag and can receive signals from the UWB positioning tag; and the data acquisition device is used to measure the speed, acceleration or body posture information of the test vehicle.

[0008] In some embodiments, a wireless AP is also arranged in the shell, and the wireless AP is signal-connected to the data center; a vehicle-mounted CPE is installed on the test vehicle, and the vehicle-mounted CPE is wirelessly connected to the wireless AP, and the vehicle-mounted CPE is signal-connected to the data acquisition equipment.

[0009] In some embodiments, a wave absorbing material is attached to the inner side of the shielding layer.

[0010] In a second aspect, a signal shielding test method for an intelligent connected vehicle is provided, which comprises the following steps: constructing a shell, and setting a shielding layer on the inner side of the shell, so that the inner side of the shielding layer forms a tunnel; arranging UWB positioning base stations at equal distances in the tunnel, wherein the UWB positioning base stations can broadcast their position coordinates and time in real time; installing a UWB positioning tag on a test vehicle; using the UWB positioning tag to receive the position coordinates and time of the UWB positioning base station, and calculating the position information of the test vehicle according to the position coordinates and time of the UWB positioning base station.

[0011] In some embodiments, the use of the UWB positioning tag to receive the location coordinates and time of the UWB positioning base station, and calculating the location information of the test vehicle based on the location coordinates and time of the UWB positioning base station, includes: obtaining the location coordinates and time of at least three of the UWB positioning base stations around the test vehicle; calculating the distance between the test vehicle and at least three of the UWB positioning base stations based on the time when the UWB positioning base station sends its location coordinates and the time when the UWB positioning tag receives the location coordinates of the UWB positioning base station; calculating the location information of the test vehicle based on the distance between the test vehicle and at least three of the UWB positioning base stations and the location coordinates of at least three of the UWB positioning base stations.

[0012] In some embodiments, the test vehicle is also equipped with a data acquisition device, which is connected to the UWB positioning tag; after using the UWB positioning tag to receive the location coordinates and time of the UWB positioning base station, and calculating the location information of the test vehicle based on the location coordinates and time of the UWB positioning base station, it also includes: outputting the location information of the test vehicle to the data acquisition device.

[0013] In some embodiments, a wireless AP is arranged in the shell, and a vehicle-mounted CPE is installed on the test vehicle; after using the UWB positioning tag to receive the location coordinates and time of the UWB positioning base station, and calculating the location information of the test vehicle according to the location coordinates and time of the UWB positioning base station, it also includes: transmitting the location information of the test vehicle and the speed, acceleration and body posture information of the test vehicle measured by the data acquisition equipment to the data center through the vehicle-mounted CPE and the wireless AP.

[0014] In some embodiments, after constructing the shell and providing a shielding layer on the inner side of the shell so that the inner side of the shielding layer forms a tunnel, the method further includes: attaching an absorbing material on the inner side of the shielding layer.

[0015] In some embodiments, after the UWB positioning base stations are arranged at equal distances in the tunnel, the method further includes: measuring the position information of the UWB positioning base stations, and inputting the measured position information into the corresponding UWB positioning base stations.

[0016] The beneficial effects brought about by the technical solution provided by the present invention include:

[0017] The embodiments of the present invention provide a signal shielding test system and method for an intelligent connected vehicle. Since a shielding layer is arranged inside the shell, the satellite signals and wireless signals inside and outside the tunnel can be cut off, so that the shell can simulate a real mountain tunnel. Moreover, through the deployed UWB positioning base station and UWB positioning tag, the position information of the test vehicle can be calculated without the need for satellite signals and wireless signals. Therefore, the positioning information can be accurately obtained without the need for a road closure test in a real mountain tunnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 A schematic structural diagram of a housing of a signal shielding test system for an intelligent networked vehicle provided by an embodiment of the present invention;

[0020] Figure 2 A schematic diagram of the layout structure of a UWB positioning base station of a signal shielding test system for an intelligent connected vehicle provided in an embodiment of the present invention;

[0021] Figure 3A schematic diagram of the structure of a signal shielding test system for an intelligent connected vehicle provided by an embodiment of the present invention;

[0022] Figure 4 Schematic diagram of the structure of the non-tunnel scenario test system.

[0023] In the figure:

[0024] 1. Shell; 2. Shielding layer; 3. UWB positioning base station; 4. Test vehicle; 5. Wireless AP. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] The embodiments of the present invention provide a signal shielding test system and a test method for an intelligent connected vehicle, which can solve the problems in the related art that the approval cost of road closure testing is high, the signal is shielded, and accurate positioning information cannot be obtained.

[0027] See also Figure 1 and Figure 2 As shown, a signal shielding test system for an intelligent connected vehicle provided by an embodiment of the present invention may include: a shell 1, a shielding layer 2 is provided in the shell 1, wherein the shell 1 is a sufficiently long building shell 1 built by an operator, and the inner side of the shielding layer 2 is surrounded by a tunnel, and the shielding layer 2 is provided to simulate the shielding effect of the tunnel on the signal, cut off the satellite signals and wireless communication signals inside and outside the tunnel, and create a signal shielding driving scene for the test vehicle 4; UWB positioning base stations 3 are arranged at equal distances in the tunnel, wherein the UWB positioning base stations 3 are arranged at intervals along the length direction of the tunnel, and the position of each UWB positioning base station 3 is fixed after installation, and the UWB positioning base station 3 is used to broadcast its real-time Position coordinates and time. The position information of the UWB positioning base station 3 can be accurately mapped by manual measurement after the installation of the UWB positioning base station 3 is completed, so as to ensure the accuracy of the position information of the test vehicle 4 calculated subsequently; and the test vehicle 4, the test vehicle 4 is equipped with a UWB positioning tag, and the UWB positioning tag is used to receive the position coordinates and time of the UWB positioning base station 3, that is, the position coordinates and time signals broadcast by the UWB positioning base station 3 in the shell 1 can be received by the UWB positioning tag, and the UWB positioning tag can calculate the position information of the test vehicle 4 according to the position coordinates and time of the UWB positioning base station 3.

[0028] In this embodiment, by setting up a UWB positioning base station 3 in the tunnel and a UWB positioning tag on the test vehicle 4, the UWB positioning tag can accurately calculate the position information of the test vehicle 4 after receiving the position coordinates and time broadcast by the UWB positioning base station 3. The UWB positioning base station 3 and the UWB positioning tag are both inside the tunnel, and the signal broadcast by the UWB positioning base station 3 will not be subject to any interference or shielding. The UWB positioning tag can accurately receive the position coordinates and time broadcast by the UWB positioning base station 3, so that the position information of the test vehicle 4 calculated by the UWB positioning tag is also relatively accurate. In the process of calculating the position information of the test vehicle 4, there is no need to use satellite signals and wireless signals, nor is there a need to conduct testing in a real mountain tunnel, which greatly reduces the testing cost.

[0029] In some embodiments, see Figure 3 As shown, the test vehicle 4 may also be installed with a data acquisition device; the data acquisition device is connected to the UWB positioning tag, and the data acquisition device can receive the signal of the UWB positioning tag, that is, the UWB positioning tag and the data acquisition device can communicate, and the position information of the test vehicle 4 calculated by the UWB positioning tag can be transmitted to the data acquisition device for use by the data acquisition device; and the data acquisition device is used to measure the speed, acceleration or body posture information of the test vehicle 4, that is, the data acquisition device is installed on the test vehicle 4, and when the test vehicle 4 is moving, the data acquisition device itself can calculate the speed, acceleration and body posture of the test vehicle 4 and other information, so as to facilitate subsequent judgment of the vehicle's driving function and performance.

[0030] For further information, see Figure 3 As shown, a wireless AP5 can also be arranged in the housing 1 to build a wireless network in the tunnel, and the wireless AP5 is connected to the data center by signal, wherein the wireless AP5 can be connected to the data center through a wired network or a wireless network. In this embodiment, it is preferred to use a wired network to connect to the data center; a vehicle-mounted CPE can be installed on the test vehicle 4, and the vehicle-mounted CPE can be wirelessly connected to the wireless AP5, and the vehicle-mounted CPE is connected to the data acquisition equipment by signal, so that the speed, acceleration, and body posture information measured by the data acquisition equipment are transmitted to the data center through the vehicle-mounted CPE and the wireless AP5. At the same time, the location information of the test vehicle 4 calculated by the UWB positioning tag can also be transmitted to the data center through the data acquisition equipment, the vehicle-mounted CPE and the wireless AP5. In this embodiment, the installed vehicle-mounted CPE is equivalent to a wifi module. The networking of the data acquisition equipment is realized by setting the vehicle-mounted CPE and the wireless AP5, and the vehicle-to-vehicle communication in the tunnel and the communication inside and outside the tunnel can be realized.

[0031] In some optional embodiments, the inner side of the shielding layer 2 may also be attached with absorbing materials to prevent diffuse reflection of the signal in the tunnel. In this embodiment, although the GNSS satellite signal and LTE-V communication signal of the test vehicle 4 itself are shielded by the shielding layer 2 and absorbing materials of the tunnel, the data acquisition equipment and data acquisition equipment installed on the test vehicle 4 can realize wireless vehicle-to-vehicle and vehicle-to-cloud communication through CPE-AP-wired private network; the data acquisition equipment can measure the position of the test vehicle 4 through the UWB positioning tag, which can not only create a signal-shielded driving scene for the test vehicle 4, but also provide communication signals and high-precision positioning information for the data acquisition equipment on the vehicle.

[0032] The embodiment of the present invention also provides a method for testing signal shielding of an intelligent connected vehicle, which may include the following steps:

[0033] Step 1: construct a shell 1, and set a shielding layer 2 on the inner side of the shell 1, so that the inner side of the shielding layer 2 forms a tunnel.

[0034] Furthermore, after the shell 1 is constructed and a shielding layer 2 is provided on the inner side of the shell 1 so that the inner side of the shielding layer 2 forms a tunnel, the method may further include: attaching an absorbing material on the inner side of the shielding layer 2 to prevent diffuse reflection of the signal in the tunnel.

[0035] Step 2: Deploy UWB positioning base stations 3 at equal distances in the tunnel, wherein the UWB positioning base stations 3 can broadcast their position coordinates and time in real time.

[0036] Preferably, after equidistantly arranging the UWB positioning base stations 3 in the tunnel, the method may further include: measuring the position information of the UWB positioning base stations 3, and inputting the measured position information into the corresponding UWB positioning base stations 3. In this embodiment, the UWB positioning base stations 3 are first installed, and then the positions of the UWB positioning base stations 3 are accurately mapped, so as to ensure that the position information broadcasted by the UWB positioning base stations 3 is relatively accurate.

[0037] Step 3: Install a UWB positioning tag on the test vehicle 4.

[0038] Step 4: Use the UWB positioning tag to receive the location coordinates and time of the UWB positioning base station 3 , and calculate the location information of the test vehicle 4 according to the location coordinates and time of the UWB positioning base station 3 .

[0039] In step 4, the use of the UWB positioning tag to receive the position coordinates and time of the UWB positioning base station 3, and calculating the position information of the test vehicle 4 according to the position coordinates and time of the UWB positioning base station 3, may include: obtaining the position coordinates and time of at least three UWB positioning base stations 3 around the test vehicle 4, wherein, during the movement of the test vehicle 4 in the tunnel, as the test vehicle 4 moves, the distance between the test vehicle 4 and each UWB positioning base station 3 is changing, some UWB positioning base stations 3 are close to the test vehicle 4, and some UWB positioning base stations 3 are far from the test vehicle 4. When calculating the position information of the test vehicle 4, the UWB positioning tag can obtain the position coordinates and corresponding time information of at least three UWB positioning base stations 3 near the UWB positioning tag, and the closer the position is, the closer the time is. The near signal is also relatively stronger; according to the time when the UWB positioning base station 3 sends out its position coordinates, and the time when the UWB positioning tag receives the position coordinates of the UWB positioning base station 3, the distance between the test vehicle 4 and at least three of the UWB positioning base stations 3 is calculated, wherein the distance calculation formula between the test vehicle 4 and each UWB positioning base station 3 can be s=c*Δt, wherein c is the speed of light, and Δt is the difference between the time when the UWB positioning base station 3 sends out its position coordinates and the time when the UWB positioning tag receives the position coordinates of the UWB positioning base station 3; the position information of the test vehicle 4 can be calculated based on the distance between the test vehicle 4 and at least three of the UWB positioning base stations 3, and the position coordinates of at least three of the UWB positioning base stations 3, thereby determining the high-precision positioning information of the test vehicle 4.

[0040] Furthermore, the test vehicle 4 is also equipped with a data acquisition device, which is connected to the UWB positioning tag; after using the UWB positioning tag to receive the location coordinates and time of the UWB positioning base station 3, and calculating the location information of the test vehicle 4 according to the location coordinates and time of the UWB positioning base station 3, it can also include: outputting the location information of the test vehicle 4 to the data acquisition device. That is to say, the UWB positioning tag and the data acquisition device can communicate with each other, and the location information of the test vehicle 4 calculated by the UWB positioning tag can be sent to the data acquisition device for use by the data acquisition device.

[0041] In some optional embodiments, the shell 1 may be provided with a wireless AP5 inside, the test vehicle 4 may be equipped with a vehicle-mounted CPE, and the wireless AP5 may be connected to the data center signal; the vehicle-mounted CPE is wirelessly connected to the wireless AP5, and the vehicle-mounted CPE is connected to the data acquisition equipment signal; after using the UWB positioning tag to receive the position coordinates and time of the UWB positioning base station 3, and calculating the position information of the test vehicle 4 according to the position coordinates and time of the UWB positioning base station 3, it may also include: transmitting the position information of the test vehicle 4 and the speed, acceleration and body posture information of the test vehicle 4 measured by the data acquisition equipment to the data center through the vehicle-mounted CPE and the wireless AP5, so as to judge and evaluate the driving function and performance of the test vehicle 4 through these measured data in the data center.

[0042] The testing method provided by the embodiment of the present invention can realize the accurate measurement and evaluation of the speed, position, driving function and performance of the autonomous driving vehicle in the signal shielding state.

[0043] See also Figure 4 As shown, when the test vehicle 4 is located in a non-tunnel scenario, the test vehicle 4 can receive satellite signals and wireless communication signals, and the vehicle's location information can be measured through the GNSS module on the test vehicle 4, and network communication can be achieved through the 4G module.

[0044] In the description of the present invention, it should be noted that the terms "upper", "lower", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present invention. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0045] It should be noted that, in the present invention, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0046] The foregoing is merely a specific embodiment of the present invention, which enables those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A signal shielding test system for intelligent connected vehicles, characterized in that: It includes: A shell (1), wherein a shielding layer (2) is provided in the shell (1), the inner side of the shielding layer (2) forms a tunnel, UWB positioning base stations (3) are arranged at equal distances in the tunnel, and the UWB positioning base stations (3) are used to broadcast their position coordinates and time in real time; A test vehicle (4), the test vehicle (4) being equipped with a UWB positioning tag, the UWB positioning tag being used to receive the position coordinates and time of the UWB positioning base station (3), and to calculate the position information of the test vehicle (4) according to the position coordinates and time of the UWB positioning base station (3); The position coordinates of the UWB positioning base station (3) are manually measured after the UWB positioning base station (3) is installed, and the measured position coordinates are input into the corresponding UWB positioning base station (3); The test vehicle (4) is also equipped with a data acquisition device, the data acquisition device is connected to the UWB positioning tag, and the data acquisition device receives the signal of the UWB positioning tag; The data acquisition device is used to measure the speed, acceleration or body posture information of the test vehicle (4); A wireless AP (5) is also arranged in the housing (1), and the wireless AP (5) is signal-connected to the data center; The test vehicle (4) is equipped with a vehicle-mounted CPE, which is wirelessly connected to a wireless AP (5), and the vehicle-mounted CPE is signal-connected to the data acquisition device, so that the speed, acceleration and vehicle body posture information measured by the data acquisition device are transmitted to the data center through the vehicle-mounted CPE and the wireless AP (5).

2. The intelligent connected vehicle signal shielding test system according to claim 1, characterized in that: Wave-absorbing material is also attached to the inner side of the shielding layer (2).

3. A method for testing signal shielding of intelligent connected vehicles, characterized in that: It includes the following steps: Constructing a shell (1), and arranging a shielding layer (2) on the inner side of the shell (1), so that the inner side of the shielding layer (2) forms a tunnel; UWB positioning base stations (3) are arranged at equal distances in the tunnel, wherein the UWB positioning base stations (3) broadcast their position coordinates and time in real time; Installing a UWB positioning tag on the test vehicle (4); Using the UWB positioning tag to receive the position coordinates and time of the UWB positioning base station (3), and calculating the position information of the test vehicle (4) according to the position coordinates and time of the UWB positioning base station (3); The test vehicle (4) is also equipped with a data acquisition device, which is connected to the UWB positioning tag; the data acquisition device receives the signal of the UWB positioning tag; The data acquisition device is used to measure the speed, acceleration or body posture information of the test vehicle (4); A wireless AP (5) is also arranged in the housing (1), and the wireless AP (5) is signal-connected to the data center; The test vehicle (4) is equipped with a vehicle-mounted CPE, the vehicle-mounted CPE is wirelessly connected to the wireless AP (5), and the vehicle-mounted CPE is signal-connected to the data acquisition device; After using the UWB positioning tag to receive the position coordinates and time of the UWB positioning base station (3), and calculating the position information of the test vehicle (4) according to the position coordinates and time of the UWB positioning base station (3), the method further includes: Transmitting the position information of the test vehicle (4) and the speed, acceleration and body posture information of the test vehicle (4) measured by the data acquisition device to a data center via the on-board CPE and the wireless AP (5); After the UWB positioning base stations (3) are arranged at equal distances in the tunnel, the method further comprises: The position coordinates of the UWB positioning base station (3) are measured, and the measured position coordinates are input into the corresponding UWB positioning base station (3).

4. The intelligent connected vehicle signal shielding test method according to claim 3, characterized in that: The method of using the UWB positioning tag to receive the position coordinates and time of the UWB positioning base station (3), and calculating the position information of the test vehicle (4) according to the position coordinates and time of the UWB positioning base station (3), comprises: Obtaining the position coordinates and time of at least three UWB positioning base stations (3) around the test vehicle (4); Calculate the distance between the test vehicle (4) and at least three of the UWB positioning base stations (3) based on the time when the UWB positioning base station (3) sends its position coordinates and the time when the UWB positioning tag receives the position coordinates of the UWB positioning base station (3); The position information of the test vehicle (4) is calculated based on the distance between the test vehicle (4) and at least three of the UWB positioning base stations (3), and the position coordinates of at least three of the UWB positioning base stations (3).

5. The intelligent connected vehicle signal shielding test method according to claim 3, characterized in that: After using the UWB positioning tag to receive the position coordinates and time of the UWB positioning base station (3), and calculating the position information of the test vehicle (4) according to the position coordinates and time of the UWB positioning base station (3), the method further includes: The position information of the test vehicle (4) is output to the data acquisition device.

6. The intelligent connected vehicle signal shielding test method according to claim 3, characterized in that: After the shell (1) is constructed and a shielding layer (2) is provided on the inner side of the shell (1) so that the inner side of the shielding layer (2) forms a tunnel, the method further comprises: attaching an absorbing material on the inner side of the shielding layer (2).

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