Vehicle wireless communication test system

Abstract

The utility model relates to the technical field of vehicle testing, and particularly discloses a vehicle wireless communication testing system, which comprises a satellite navigation communication data acquisition module arranged at the upper end of a tested vehicle, a cellular mobile communication data acquisition module and a data analysis end for analyzing satellite navigation communication data and cellular mobile communication data are respectively arranged in the test vehicle; the data analysis end is respectively connected with the satellite navigation communication data acquisition module and the cellular mobile communication data acquisition module; the satellite navigation communication data acquisition module comprises a GNSS antenna which is installed on the upper surface of the roof of a tested vehicle, the height of the GNSS antenna is not larger than 70 mm, and the occupied area of the GNSS antenna is not larger than 4.86 square decimeters; and the navigation reference equipment is mounted on the lower surface of the roof of the test vehicle. In this way, the test efficiency of vehicle wireless communication can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle testing, in particular to a vehicle wireless communication testing system. Background Art

[0002] With the rapid development of vehicle technology, satellite navigation and cellular networks, vehicle technology is not only closely integrated with satellite navigation communications, but also closely linked to cellular mobile communications such as 4G and 5G. Testing by combining satellite navigation communications with cellular mobile communications can not only provide more accurate and reliable positioning and communication support for autonomous driving technology, but also promote the development of intelligent networking and the commercial application of autonomous driving technology.

[0003] In the early stages of autonomous driving research, high-precision navigation technologies such as Beidou satellite navigation and cellular mobile communication technologies such as 5G were not widely used at the same time. In addition, as the test scenarios of satellite navigation communication testing and cellular mobile communication technology became more and more complex, and because the frequency bands of satellite navigation communication and cellular mobile communication are different, satellite navigation communication and cellular mobile communication are mostly studied and tested separately.

[0004] Based on the above statements, the existing technology mostly tests the cellular mobile communication and satellite navigation communication of the vehicle separately to ensure that the corresponding tests can be completed and carried out in an all-round manner. However, such separate tests require separate tests when testing in test areas where the satellite navigation communication test and the cellular mobile communication test overlap, such as highways, tunnels, winding mountain roads and other test scenarios. This is not only inefficient but also costly. Even if it is currently possible to combine the satellite navigation communication test and the cellular mobile communication test for testing, most of them are used to be installed on the outside of the vehicle. Not only is it easy to get the relevant test equipment wet and cause damage to the test equipment when it rains, but the relevant test equipment is expensive and easy to be stolen. Utility Model Content

[0005] In order to improve the test efficiency of vehicle wireless communication, an embodiment of the utility model provides a vehicle wireless communication test system.

[0006] The embodiment of the utility model adopts the following technical scheme: comprising: a satellite navigation communication data acquisition module is installed at the upper end of the test vehicle, and a cellular mobile communication data acquisition module and a data analysis terminal for analyzing satellite navigation communication data and cellular mobile communication data are respectively arranged inside the test vehicle; the data analysis terminal is respectively connected to the satellite navigation communication data acquisition module and the cellular mobile communication data acquisition module; wherein the satellite navigation communication data acquisition module comprises: a GNSS antenna, which is installed on the upper surface of the roof of the test vehicle, and has a height of no more than 70 mm and an area of ​​no more than 4.86 square decimeters; and a navigation reference device, which is installed on the lower surface of the roof of the test vehicle.

[0007] Beneficial effects: This solution combines the satellite navigation communication data acquisition module with the cellular mobile communication acquisition module, and can simultaneously perform tests in overlapping test scenarios of satellite navigation communication and cellular mobile communication, thereby improving the test efficiency.

[0008] At the same time, installing the navigation reference equipment, cellular mobile communication acquisition module and data analysis end test equipment in the car can prevent the relevant test equipment from getting wet and damaged when it rains. In addition, the test equipment is expensive and prone to theft.

[0009] In addition, in order to ensure that the GNSS antenna has a good ability to receive satellite navigation communication data, the height of the GNSS antenna is minimized as much as possible. When the test vehicle encounters a height-restricted area during driving, the test vehicle does not need to pass through the height-restricted area due to the excessive height of the GNSS antenna. This allows the test vehicle to meet the requirements of vehicle wireless communication testing in most areas.

[0010] Finally, the GNSS antenna occupies a small area, which is about 1 / 5 of the roof area of ​​the current common test vehicles. Since the current common test vehicles themselves have built-in on-board satellite navigation equipment, and the GNSS antenna is small in size, it can be installed in different positions on the roof of the test vehicle, with high flexibility and away from the on-board satellite navigation equipment to reduce interference and improve test accuracy.

[0011] Preferably, the GNSS antenna includes a main antenna and a slave antenna; the slave antenna and the main antenna are respectively mounted on the roof and located on the central axis of the driving direction of the test vehicle, and the main antenna is located behind the slave antenna.

[0012] Beneficial effect: The front and rear positions of the main antenna and the slave antenna are set and located on the central axis of the test vehicle's driving direction to maintain a consistent heading, thereby improving the accuracy of the test vehicle test.

[0013] Preferably, the distance between the main antenna and the slave antenna is not less than 1000 mm and not more than the length of the roof of the test vehicle.

[0014] Beneficial effect: The greater the distance between the master and slave antennas, the smaller the heading angle accuracy of the test vehicle, and the better the accuracy of the satellite navigation communication test.

[0015] Preferably, the navigation reference device is located on the central axis of the driving direction of the test vehicle.

[0016] Beneficial effect: The navigation reference device and the master and slave antennas are all located on the central axis, which can ensure that the arm value in the X-axis direction is 0 as much as possible, further improving the accuracy of the test.

[0017] Preferably, the cellular mobile communication data acquisition module comprises: a vehicle-mounted mobile communication unit and a cellular mobile communication comparison machine.

[0018] Beneficial effect: The cellular mobile communication data acquisition module is further limited.

[0019] Preferably, the data analysis terminal comprises a laptop computer.

[0020] Beneficial effect: further limits the data analysis end.

[0021] Preferably, the GNSS antenna model is GPS500.

[0022] Beneficial effects: The GPS500 antenna is compact, solid and reliable, with a waterproof rating of IP67. Even in the event of sudden rain or snow, it is difficult to damage the antenna.

[0023] Beneficial effects of the utility model

[0024] Firstly, compared with only being able to conduct cellular mobile communication tests and satellite navigation communication tests on the vehicle separately, the utility model can perform communication tests in overlapping test scenarios of satellite navigation communication tests and cellular mobile communication tests by combining modules such as satellite navigation communication tests and cellular mobile communication tests, and its test efficiency is higher.

[0025] At the same time, compared with placing communication test equipment such as satellite navigation communication test and cellular mobile communication test outside the test vehicle for testing, the utility model places the cellular mobile communication test module into the test vehicle, and places the satellite navigation reference equipment into the vehicle and sets the corresponding positions of the main antenna, the slave antenna and the navigation reference equipment. While ensuring low error and high precision during the test, it can also prevent the related test equipment from being wetted and causing damage to the equipment when encountering rain during the test. In addition, placing related test equipment other than the GNSS antenna into the vehicle can avoid shutting down the test vehicle after the test is completed, and can also lock the related test equipment other than the GNSS antenna in the vehicle to prevent it from being stolen.

[0026] Secondly, to ensure low error and high accuracy during testing, the main antenna and the slave antenna are at least 1000mm apart. The navigation reference device is located on the central axis of the test vehicle's driving direction, and the distance to the main antenna and the distance to the slave antenna are equal. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic diagram of a vehicle wireless communication test system according to a first embodiment of the utility model (a);

[0028] Figure 2(b) is a schematic diagram of a vehicle wireless communication test system according to the first embodiment of the utility model;

[0029] Figure 3 This is a schematic diagram of the structure of the GNSS antenna according to the first embodiment of the present invention. DETAILED DESCRIPTION

[0030] The following is further described in detail through specific implementation methods:

[0031] DTU: The abbreviation of Data Transfer Unit, which is a wireless terminal device dedicated to converting serial port data into IP data or converting IP data into serial port data for transmission over a wireless communication network. In the first embodiment of the present application, the DTU device includes 4G DTU and 5G DTU.

[0032] Vector arm value: refers to the three-dimensional spatial position deviation of the GNSS antenna phase center relative to a fixed reference point (such as the phase center of the navigation reference device, etc.), including deviations in the horizontal direction (X, Y axis) and the vertical direction (Z axis).

[0033] TBOX: Telematics BOX is a car networking system used to realize information exchange between vehicles, the Internet and mobile phones.

[0034] Car computer: The abbreviation for the in-vehicle infotainment product installed in the vehicle.

[0035] Cellular mobile communication comparison gold machine: used for comparison test with vehicle-mounted mobile communication unit.

[0036] Heading angle: refers to the angle between the front wheel steering angle of the test vehicle and its driving direction.

[0037] Heading angle accuracy: refers to the accuracy of the heading angle measurement of the test vehicle.

[0038] The reference numerals in the drawings of the specification include:

[0039] GNSS antenna 1, slave antenna 11, master antenna 12, navigation reference device 2, power supply 3, connection line 41 for connecting GNSS antenna and navigation reference device, USB connection line 42, serial communication interface line 43, power supply line 44, laptop computer 5, test vehicle 6

[0040] Embodiment 1

[0041] This embodiment provides a vehicle wireless communication test system, which includes a vehicle-mounted satellite navigation communication test and a cellular network communication test. In a driving scenario of a test vehicle 6, a satellite navigation communication test and a cellular mobile communication test can be carried out simultaneously.

[0042] like Figure 1 As shown, a vehicle wireless communication test system includes a test vehicle 6, a data analysis terminal, a satellite navigation communication data acquisition module and a cellular mobile communication data acquisition module. The satellite navigation communication data acquisition module includes a GNSS antenna 1 and a navigation reference device 2; the cellular mobile communication data acquisition module includes a cellular mobile communication comparison machine and a vehicle-mounted mobile communication unit; in this embodiment, the data analysis terminal is a laptop computer 5. Among them, the GNSS antenna 1 includes a main antenna 12 and a slave antenna 11. The vehicle-mounted mobile communication unit includes a TBOX and a vehicle machine. The cellular mobile communication comparison machine is a mobile phone. The data analysis terminal is connected to the satellite navigation communication data acquisition module and the cellular mobile communication data acquisition module respectively.

[0043] Specifically, the test vehicle 6 is a small car. The main antenna 12 and the slave antenna 11 are located on the upper surface of the roof of the test vehicle 6, and can be installed on the test vehicle 6 by suction cups, so that the main antenna 12 and the slave antenna 11 can be flexibly set in different positions on the roof. The navigation reference device 2 is located inside the test vehicle 6 and can be fixed to the lower surface of the roof of the test vehicle 6 by bolts. The laptop computer 5 and the mobile phone are placed on the seats in the test vehicle 6. The TBOX and the car machine are both located inside the test vehicle 6, and are general settings of the prior art.

[0044] like Figure 2 As shown, the first port of the navigation reference device 2 is connected to the main antenna 12 through the USB connection line 42 used to connect the GNSS antenna 1 and the navigation reference device 2, the second port of the navigation reference device 2 is connected to the slave antenna 11 through the USB connection line 42 used to connect the GNSS antenna 1 and the navigation reference device 2, the third port of the navigation reference device 2 is connected to the laptop computer 5 through the USB connection line 42, and the fourth port of the navigation reference device 2 is connected to the power supply 3 through the power line 44. The laptop computer 5 is electrically connected to the mobile phone, the vehicle computer and the TBOX.

[0045] In this embodiment, the selected test vehicle 6 is a small car. Using the GNSS antenna 1 of GPS500, the accuracy of the test can only be guaranteed when the heading angle accuracy is greater than 0.2°. Therefore, the distance between the main antenna 12 and the slave antenna 11 needs to be set to be no less than 1m, and the farther the distance, the smaller the heading angle accuracy and the more accurate the test. Limited by the length of the roof of the test vehicle 6, the main antenna 12 is set at the rear edge of the roof, and the slave antenna 11 is set at the front edge of the roof, which is the length of the roof of the test vehicle 6.

[0046] like Figure 3 As shown, the radius of the GNSS antenna 1 is A=176 mm and the height is b=70 mm.

[0047] For example Figure 1 As shown, the positive direction of the y-axis is the vehicle driving direction, and the positive direction of the z-axis is the vertical height direction. In one implementation of this embodiment, when the distance between the main antenna 12 and the slave antenna 11 is set to 2m, on the z-axis, the distances from the phase center of the navigation reference device 2, the phase center of the main antenna 12, and the phase center of the slave antenna 11 to the ground are set to Z0, Z1, and Z2, respectively. The vector arm values ​​of the main antenna 12 and the slave antenna 11 to the phase center of the navigation reference device 2 on the Z-axis are Z10 and Z20, respectively. Since the main and slave antennas 11 are placed on the same plane on the roof of the test vehicle 6, that is, Z1=Z2. In this embodiment, the navigation reference device 2 is installed on the lower surface of the roof located inside the test vehicle 6, and the thickness of the roof is negligible, that is, Z0=Z1=Z2, and Z10=Z20=0. Therefore, installing the navigation reference device 2, the main antenna 12, and the slave antenna 11 on the same horizontal plane can reduce measurement errors and improve the positioning accuracy of the test vehicle 6.

[0048] On the y-axis, the distances from the phase centers of the main antenna 12 and the slave antenna 11 to the phase center of the navigation reference device 2 are set to Y10 and Y20 respectively. When the distance between the main antenna 12 and the slave antenna 11 is set to 1 m, the distance between the phase centers is measured to be 0.2 m.

[0049] On the x-axis, when the navigation reference device 2 is placed on the USB connecting cable 42 at the phase center of the main antenna 12 and the slave antenna 11, that is, the distance from the phase center of the main antenna 12 and the slave antenna 11 on the x-axis to the phase center of the navigation reference device 2 can be regarded as 0, that is, when the navigation reference device 2 is located on the USB connecting cable 42 between the main antenna 12 and the slave antenna 11, the measurement error can be reduced and the positioning accuracy of the test vehicle 6 can be improved.

[0050] The satellite navigation communication data acquisition module also includes a DTU and a vehicle-mounted satellite navigation communication device. The DTU is specifically a 5GDTU or a 4G DTU. The DTU is used for the transmission of RTK data. The DTU is installed in the vehicle and can be placed on the rear seat or fixedly installed on the lower surface of the roof of the test vehicle. The vehicle-mounted satellite navigation communication device is installed in the vehicle. The vehicle-mounted satellite navigation communication device is an existing device currently installed in the general test vehicle 6. The vehicle-mounted satellite navigation communication device is connected to the laptop computer 5 by electrical connection, and the fifth port of the navigation reference device 2 is connected to the DTU via a serial communication interface line 43.

[0051] like Figure 3As shown, in this embodiment, the height of the GNSS antenna 1 is b=70 mm, the diameter A is 2.51 times of b, the floor area is 4.86 square decimeters, and the volume is about 3.40 cubic decimeters. It has a small height, a small floor area and a small volume, and can be flexibly arranged at any position on the roof of the test vehicle 6.

[0052] How to use this embodiment

[0053] The satellite navigation communication data acquisition module is used to collect satellite navigation communication data, and the cellular mobile communication data acquisition module is used to collect cellular mobile communication data, and the cellular mobile communication data and satellite navigation communication data are uploaded to the data analysis end respectively. The data analysis end compares the collected cellular mobile communication data and satellite navigation communication data with the cellular data and navigation data collected by the on-board cellular mobile communication device and the on-board satellite navigation communication device in the test vehicle respectively.

[0054] In the description of the present utility model, it should be noted that the terms "upper", "lower", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model.

[0055] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0056] It should be understood that the term "and / or" used in this article is only a description of the same field of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0057] Although the subject matter has been described in language specific to structural features and / or methodological logical actions, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or actions described above. On the contrary, the specific features and actions described above are merely example forms of implementing the claims.

[0058] The above is only an embodiment of the present invention. The common sense such as the known specific structure and characteristics in the scheme is not described in detail here. The ordinary technicians in the relevant field know all the common technical knowledge in the technical field of the invention before the application date or priority date, can know all the existing technologies in the field, and have the ability to apply the conventional experimental means before that date. The ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the enlightenment given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, which should also be regarded as the scope of protection of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A vehicle wireless communication test system, characterized in that: include: A satellite navigation communication data acquisition module is installed on the upper end of the test vehicle, and a cellular mobile communication data acquisition module and a data analysis terminal for analyzing satellite navigation communication data and cellular mobile communication data are respectively arranged inside the test vehicle; The data analysis end is connected to the satellite navigation communication data acquisition module and the cellular mobile communication data acquisition module respectively; Wherein, the satellite navigation communication data acquisition module includes: The GNSS antenna is installed on the roof of the test vehicle with a height of no more than 70 mm and an area of ​​no more than 4.86 square decimeters; The navigation reference equipment is installed on the lower surface of the roof of the test vehicle.

2. A vehicle wireless communication test system according to claim 1, characterized in that: The GNSS antenna includes a master antenna and a slave antenna; The slave antenna and the main antenna are respectively installed on the roof and located on the central axis of the driving direction of the test vehicle, and the main antenna is located behind the slave antenna.

3. A vehicle wireless communication test system according to claim 2, characterized in that: The distance between the main antenna and the slave antenna shall be no less than 1000mm and no longer than the roof length of the test vehicle.

4. A vehicle wireless communication test system according to claim 2, characterized in that: The navigation reference device is located on the central axis of the driving direction of the test vehicle.

5. A vehicle wireless communication test system according to claim 1, characterized in that: The cellular mobile communication data acquisition module includes: a vehicle-mounted mobile communication unit and a cellular mobile communication comparison machine.

6. A vehicle wireless communication test system according to claim 5, characterized in that: The vehicle-mounted mobile communication unit includes a TBOX and a vehicle computer.

7. A vehicle wireless communication test system according to claim 1, characterized in that: The data analysis terminal includes a notebook computer.

8. A vehicle wireless communication test system according to claim 1, characterized in that: The GNSS antenna model is GPS500.

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