Cascade street lamp base station device for vehicle automatic driving test

Abstract

A cascade street lamp base station device for a vehicle automatic driving test comprises a main street lamp base station device and an auxiliary street lamp base station device, the main street lamp base station device comprises a street lamp and a main base station module, and the auxiliary street lamp base station device comprises a street lamp and an auxiliary base station module; the main base station module comprises a battery, a power management module, a GNSS module, a wireless module, a GNSS antenna and a wireless antenna for transmitting wireless signals; the auxiliary base station module comprises a battery, a power management module, a wireless module and a wireless antenna for transmitting wireless signals; the battery supplies power to the illuminating lamp of the street lamp, the GNSS module and the wireless module through the power management module; the GNSS module is connected with the GNSS antenna so as to acquire a GNSS original signal; the wireless module is connected with the wireless antenna and used for wireless communication between the main street lamp base station device and the adjacent auxiliary street lamp base station devices and between the adjacent auxiliary street lamp base station devices. According to the utility model, the equipment building and debugging process is simplified, cascade forwarding and long-distance wireless coverage of RTK correction signals are realized, and the test cost is effectively reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of vehicle automatic driving test, concretely relates to a kind of vehicle automatic driving test used cascade street lamp base station device. BACKGROUND

[0002] Vehicle needs to obtain vehicle high-precision position information when automatic driving test and high-level auxiliary driving test, generally place flow station based on GNSS collection on vehicle, and send RTK difference correction signal to flow station by certain mode, after difference calculation of flow station, vehicle obtains centimeter-level positioning accuracy.

[0003] Currently, there are two ways to obtain RTK correction signal, as shown in Figure 1 and Figure 2 . The first is shown in Figure 1 , self-built base station beside the vehicle to be measured, that is, by setting GNSS collection device as base station mode, placed on roadside for long time convergence calculation, relative RTK signal is sent to flow station for difference positioning. The other is shown in Figure 2 , 4G unit is integrated inside or outside flow station, flow station sends its position information to remote RTK server through 4G unit, RTK server returns RTK correction signal corresponding to the position to flow station through 4G unit again, after difference calculation of flow station, vehicle obtains centimeter-level positioning accuracy.

[0004] At the same time, if vehicle automatic driving function is tested at night, mobile street lamp system needs to be built according to test standard. Usually, street lamp is adjusted to fixed height and placed on base, a certain number of street lamps are placed according to equal interval arrangement method, and finally the brightness of street lamp is adjusted to meet the requirements of test standard illumination.

[0005] It can be seen that the following problems will be encountered during vehicle automatic driving test: 1. A lot of time is spent on the construction of test environment, such as temporary construction of street lamp system and adjustment of street lamp system brightness. 2. If self-built base station is used, since base station and flow station use wireless communication mode, and the data communication amount of both sides is large, communication distance and communication rate cannot be considered at the same time. In addition, self-built base station is generally a high-power wireless transmitting tower, and the construction cost is high. 3. If 4G mode is used to obtain RTK signal, user needs to open 4G service and RTK network service, and if multiple vehicles are needed for multi-vehicle communication test, 4G service and RTK network service need to be opened for each vehicle, and test cost increases linearly. UTILITY MODEL CONTENTS

[0006] The purpose of this invention is to provide a cascaded street light base station device for testing autonomous driving of vehicles, which simplifies the equipment setup and debugging process, enables cascaded forwarding of RTK correction signals and long-distance wireless coverage, effectively reduces testing costs, and thus solves the above-mentioned technical problems.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is: a cascaded street light base station device for vehicle autonomous driving testing, comprising a main street light base station device and an auxiliary street light base station device, wherein the main street light base station device comprises a street light and a main base station module, and the auxiliary street light base station device comprises a street light and an auxiliary base station module.

[0008] The main base station module is installed on the street light pole. The main base station module includes a battery, a power management module, a GNSS module, a wireless module, a GNSS antenna, and a wireless antenna for transmitting wireless signals.

[0009] The auxiliary base station module is installed on the street light pole, and the auxiliary base station module includes a battery, a power management module, a wireless module, and a wireless antenna for transmitting wireless signals.

[0010] The battery powers the streetlights, the GNSS module, and the wireless module via a power management module. The GNSS module is connected to a GNSS antenna to acquire raw GNSS signals. The wireless module is connected to the wireless antenna for wireless communication between the main streetlight base station and adjacent auxiliary streetlight base stations, as well as between two adjacent auxiliary streetlight base stations.

[0011] The wireless module of the main street light base station device is equipped with a web server for controlling the brightness of the lighting.

[0012] The wireless antenna is a 2.4G antenna, and the wireless module is a 2.4G wireless module.

[0013] The wireless antenna is a LoRa antenna, and the wireless module is a LoRa wireless module.

[0014] The streetlight is equipped with a solar panel for charging the battery.

[0015] The beneficial effects of this utility model are: This utility model integrates the functions of street lights and base stations. If the main street light base station device is fixedly installed, the geographical latitude and longitude coordinates of the installation location can be configured into the device to obtain high-precision RTK correction signals.

[0016] The main street light base station device can forward the base station signal to the adjacent auxiliary street light base station device through the wireless module. The auxiliary street light base station device then forwards the RTK correction signal to the next-level auxiliary street light base station device, realizing the cascade forwarding of the RTK correction signal and long-distance wireless coverage.

[0017] The main street light base station and the auxiliary street light base station are powered by solar charging and batteries. They only need to be installed once. During subsequent testing, the mobile station only needs to be placed on the tractor under test, which simplifies the equipment installation steps, shortens the testing, installation and debugging time, and eliminates the need to spend time setting up street lights and adjusting the test brightness during nighttime testing.

[0018] This utility model base station uses only one GNSS module and requires no network service, which can effectively reduce testing costs. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A test diagram illustrating the use of self-built base stations to provide RTK correction signals in existing technologies;

[0021] Figure 2 A test diagram illustrating the use of 4G networks to provide RTK correction signals in existing technologies;

[0022] Figure 3 This is a schematic diagram of the main street light base station device described in this utility model;

[0023] Figure 4 This is a schematic diagram of the auxiliary street light base station device described in this utility model;

[0024] Figure 5 This is a flowchart illustrating the workflow of this utility model for testing autonomous driving in vehicles.

[0025] The markings in the diagram are: 1. Test vehicle, 2. Rover, 3. GNSS antenna, 4. Data radio, 5. Base station receiver, 6. Lighting lamp, 7. Street lamp holder, 8. 4G unit, 9. Street lamp pole, 10. Battery, 11. Power management module, 12. GNSS module, 13. 2.4G wireless module, 14. 2.4G antenna, 15. Solar panel. Detailed Implementation

[0026] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention in any way.

[0027] A cascaded street light base station device for testing autonomous driving of vehicles includes a main street light base station device and auxiliary street light base station devices. The number of main street light base station devices is one, and the number of auxiliary street light base station devices is multiple. The main street light base station device and the auxiliary street light base station devices are arranged on one side or both sides of the test road.

[0028] like Figure 3 , 4 As shown, the main street light base station device includes a street light socket 7, a street light pole 9, a lighting lamp 6, a solar panel 15, and a main base station module integrated on the street light pole 9. The main base station module includes a battery 10, a power management module 11, a GNSS module 12, a GNSS antenna 3, a 2.4G wireless module 13, and a 2.4G antenna 14. The battery 10, power management module 11, GNSS module 12, and 2.4G wireless module 13 are located inside the street light pole 9, while the GNSS antenna 3 and 2.4G antenna 14 are located outside the street light pole 9. The GNSS antenna 3 is connected to the GNSS module 12, and the GNSS module 12 acquires raw GNSS signals through the GNSS antenna 3. The 2.4G antenna 14 is connected to the 2.4G wireless module 13 and is used for communication between the main street light base station device and adjacent auxiliary street light base station devices, as well as between two adjacent auxiliary street light base station devices.

[0029] The auxiliary street light base station device includes a street light holder 7, a street light pole 9, a lighting lamp 6, a solar panel 15, and an auxiliary base station module integrated on the street light pole 9. The auxiliary base station module includes a battery 10, a power management module 11, and a 2.4G wireless module 12.

[0030] The solar panels 15 of the main street light base station and the auxiliary street light base station generate electricity during the day to charge the battery 10. The battery 10 then uses the power management module 11 to convert the voltage and supply power to the lighting lamp 6. At the same time, the power management module 11 also supplies power to the 2.4G wireless module 13 and the GNSS module 12.

[0031] The GNSS module 12 in the main street light base station device acquires the raw GNSS signal through the GNSS antenna 3. The GNSS module 12 is configured as a base station and can be configured in the following two ways: (1) using a fixed coordinate method, that is, when the main street light base station device is installed for the first time, the absolute geographical latitude and longitude coordinates of the installation location are tested, and this coordinate is directly input into the GNSS module 12, so that a high-precision RTK correction signal can be calculated, and the RTK correction signal is encoded according to the RTCM protocol; (2) using a long-term position averaging method, that is, when the main street light base station device is installed for the first time, the geographical latitude and longitude coordinates of the GNSS module 12 are not configured. Since the main street light base station device does not move after installation, the GNSS module 12 continuously calculates its average latitude and longitude coordinates after acquiring the raw GNSS signal through the GNSS antenna 3, and then calculates the RTCM correction signal.

[0032] The GNSS module 12 of the main street light base station device sends the encoded RTCM information to the wireless module 13, and the wireless module 13 sends the RTCM information to the adjacent auxiliary street light base station device through the 2.4G antenna 14.

[0033] The auxiliary street light base station device transmits the RTCM signal to the 2.4G wireless module 13 through the 2.4G antenna 14. The 2.4G wireless module 13 stores the ID of the adjacent next-level auxiliary street light base station device. After querying the ID, the RTCM information is forwarded to the next-level auxiliary street light base station device with the specified ID through the 2.4G antenna 14, thereby realizing the cascade forwarding of RTK correction signals and wireless coverage.

[0034] The main street light base station device and the auxiliary street light base station device are continuously powered by solar panels 15 and batteries 10, so their base station functions can work 24 hours a day. When conducting autonomous driving tests, the mobile station only needs to be installed on the vehicle under test, which saves the installation, configuration and waiting time of the base station and street lights.

[0035] The 2.4G wireless module 13 of the main street light base station device is equipped with a WEB server. Users only need to use their mobile phones or laptops to connect to the network hotspot emitted by the 2.4G wireless module 13, enter the WEB server, configure the light brightness, and enable the street light test function. It is convenient to use and easy to configure. When not testing, the street light can be turned off to save energy and reduce street light wear.

[0036] The working process of the street light base station device used for vehicle autonomous driving testing is as follows: Figure 5As shown, the rover broadcasts to all street light base station devices. Since the rover is at different distances from the street light base station devices, the first street light base station device to receive the broadcast will send a response and return its ID to the rover. The rover records this ID and sends a request for RTCM information to the street light base station device with that ID. The specified ID street light base station device sends RTCM information to the rover. If the rover receives the RTCM information, it performs RTK differential settlement; otherwise, it broadcasts again.

[0037] In other embodiments, the 2.4G antenna and 2.4G wireless module can also be replaced by a LoRa antenna and a LoRa wireless module.

[0038] The above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Those skilled in the art should understand that modifications or equivalent substitutions can be made to the specific implementation of this utility model with reference to the above embodiments. Any modifications or equivalent substitutions that do not depart from the spirit and scope of this utility model are within the protection scope of the pending claims.

Claims

1. A cascaded street light base station device for testing autonomous driving of vehicles, characterized in that: It includes a main street light base station device and an auxiliary street light base station device. The main street light base station device includes a street light and a main base station module, and the auxiliary street light base station device includes a street light and an auxiliary base station module. The main base station module is installed on the street light pole. The main base station module includes a battery, a power management module, a GNSS module, a wireless module, a GNSS antenna, and a wireless antenna for transmitting wireless signals. The auxiliary base station module is installed on the street light pole, and the auxiliary base station module includes a battery, a power management module, a wireless module, and a wireless antenna for transmitting wireless signals. The battery supplies power to the streetlights, the GNSS module, and the wireless module via a power management module. The GNSS module is connected to the GNSS antenna to acquire the raw GNSS signal; The wireless module is connected to the wireless antenna and is used for wireless communication between the main street light base station device and the adjacent auxiliary street light base station device, as well as between two adjacent auxiliary street light base station devices.

2. The cascaded street light base station device according to claim 1, characterized in that: The wireless module of the main street light base station device is equipped with a web server for controlling the brightness of the lighting.

3. The cascaded street light base station device according to claim 1, characterized in that: The wireless antenna is a 2.4G antenna, and the wireless module is a 2.4G wireless module.

4. The cascaded street light base station device according to claim 1, characterized in that: The wireless antenna is a LoRa antenna, and the wireless module is a LoRa wireless module.

5. The cascaded street light base station device according to claim 1, characterized in that: The streetlight is equipped with a solar panel for charging the battery.

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