Vehicle-mounted OBU device

Abstract

The utility model relates to a vehicle-mounted OBU equipment, including micro-control unit, and radio frequency module, power module and function extension module connected with the micro-control unit, the radio frequency module is used for data communication with road side unit, the micro-control unit is used for information interaction with road side unit through the radio frequency module, and the function extension module is used for function extension of the road side unit. The power supply module is used for supplying power to the vehicle-mounted OBU equipment, the function extension module comprises a voice sub-module, and the voice sub-module is used for playing voice signals of the vehicle-mounted OBU equipment. According to the utility model, the road condition information and the driving information acquired by the road side unit are received by the radio frequency module of the vehicle-mounted OBU equipment, and the road condition information and the driving information are broadcasted by voice through the voice sub-module, so that a driver and passengers can know related information without observing an OBU display screen, and the driving safety is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle-mounted equipment, in particular to a vehicle-mounted OBU equipment. Background Art

[0002] In recent years, the construction of smart highways has greatly improved the intelligent perception level of highways, and vehicle-road cooperative technology has also made significant progress, aiming to implement dynamic information interaction between vehicles, roads, and vehicles and people in an all-round manner, issue early warning information, ensure traffic safety, and improve traffic efficiency, thereby forming a safe, efficient and environmentally friendly road traffic system. ETC (Electronic Toll Collection, electronic non-stop toll collection system) is currently the main toll collection system in the highway industry, and ETC after-installation OBU has achieved explosive growth. The huge user group has promoted the expansion of ETC in parking lots, gas stations, car washes and other scene applications.

[0003] OBU (On board Unit) is one of the core devices in the ETC system. It is installed on the windshield of the vehicle and is used for data communication and wireless data transmission with the onboard computer. When the vehicle enters the toll area, the OBU will receive a pre-set signal and transmit the vehicle information to the onboard computer through wireless communication technology. After receiving the data from the OBU, the onboard computer will exchange data with the central server through the built-in deduction software to complete the deduction operation.

[0004] At present, when the vehicle-mounted OBU device passes through the gantry or toll station, it will exchange information with the roadside unit RSU to obtain road condition information and driving information through the roadside unit. However, the relevant information obtained by the traditional OBU device can only be obtained from the toll amount display at the toll station or the OBU display screen, and the driver who is driving has no time to view this information. If the driver is distracted from observing the information obtained by the OBU device, it will affect driving safety. Utility Model Content

[0005] In view of this, it is necessary to provide a vehicle-mounted OBU device to solve the problem in the prior art that the driver needs to observe the toll station fee display or the OBU display screen to understand the OBU device information, which affects driving safety.

[0006] In order to solve the above problems, in a first aspect, the utility model provides a vehicle-mounted OBU device, including a micro control unit, and a radio frequency module, a power module and a function expansion module connected to the micro control unit;

[0007] The radio frequency module is used for data communication with the roadside unit;

[0008] The micro control unit is used to exchange information with the roadside unit through the radio frequency module;

[0009] The power module is used to supply power to the on-board OBU device;

[0010] The function extension module comprises a voice submodule, and the voice submodule is used for playing the voice signal of the vehicle-mounted OBU device.

[0011] Preferably, the vehicle-mounted OBU device further includes an embedded security module ESAM, and the embedded security module ESAM is connected to the micro control unit.

[0012] Preferably, the vehicle-mounted OBU device also includes:

[0013] The display module is connected to the micro control unit and is used to display the information acquired by the micro control unit.

[0014] Preferably, the micro control unit includes a wake-up circuit, which is connected to the radio frequency module, and is used to wake up the micro control unit when receiving a radio frequency signal transmitted by the radio frequency module.

[0015] Preferably, the micro control unit further includes an RFID data transceiver port, and the RFID data transceiver port is connected to the radio frequency module.

[0016] Preferably, the micro control unit further includes an I / O interface, and the micro control unit is connected to the function expansion module via the I / O interface.

[0017] Preferably, the micro control unit also includes a UART interface, a JTAG interface, a BSL interface and a USB interface.

[0018] The function expansion module also includes a camera module, which is connected to the micro control unit and is used to collect video images around the vehicle.

[0019] Preferably, the function expansion module further includes a positioning submodule, the positioning submodule is connected to the micro control unit, and the positioning submodule is used to detect the location information of the vehicle-mounted OBU device.

[0020] Preferably, the positioning submodule is a Beidou positioning device or a GPS positioning device.

[0021] The beneficial effect of adopting the above-mentioned embodiment is: when a car passes through a gantry or a toll station, the vehicle-mounted OBU device provided by the embodiment of the utility model receives the road condition information and driving information collected by the roadside unit through the radio frequency module of the vehicle-mounted OBU device, and broadcasts the road condition information and driving information through the voice sub-module, so that the driver and passengers can understand the relevant information without observing the OBU display screen, thereby improving driving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the structure of an embodiment of a vehicle-mounted OBU device provided by the utility model;

[0023] Figure 2 Another structural schematic diagram of a vehicle-mounted OBU device provided by the utility model;

[0024] Figure 3 A schematic diagram of information interaction of the vehicle-road cooperative system provided by the utility model. DETAILED DESCRIPTION

[0025] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the present application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0026] Figure 1 The structure diagram of an embodiment of a vehicle-mounted OBU device provided by the utility model is shown in FIG. Figure 1 As shown, the vehicle-mounted OBU device includes a microcontroller unit (MCU), and a radio frequency module, a power module and a function expansion module connected to the microcontroller unit MCU;

[0027] The radio frequency module is used for data communication with the roadside unit; preferably, the radio frequency module can adopt a radio frequency transceiver with model BK5822;

[0028] The micro control unit is used to exchange information with the road side unit through the radio frequency module; preferably, the micro control unit can adopt an MCU with model number CYT2B9.

[0029] The power module is used to supply power to the vehicle-mounted OBU device; wherein the power module can adopt a lithium battery or a solar cell.

[0030] The function extension module comprises a voice submodule, and the voice submodule is used for playing the voice signal of the vehicle-mounted OBU device.

[0031] Specifically, the micro control unit is used to exchange information with the roadside unit through the radio frequency module. The working principle is as follows:

[0032] First, when the vehicle passes the roadside unit RUS, the vehicle-mounted OBU device establishes a connection with the roadside unit RUS. The workflow for establishing the connection is as follows: the roadside unit continuously sends frame control information using the physical layer downlink. When the vehicle-mounted OBU device enters the effective transmission area, it receives the frame control information and replies to the corresponding request. After receiving the request, the roadside unit responds and then sends it to the MCU of the vehicle-mounted OBU device. After that, the MCU confirms the response information. After the roadside unit receives the confirmation and verifies the information, the vehicle-mounted OBU device successfully establishes a connection with the roadside unit RUS. Using the previously established connection, the vehicle-mounted OBU device and the roadside unit RUS can exchange data based on the application service type.

[0033] Furthermore, after the vehicle-mounted OBU device establishes a connection with the roadside unit, the roadside unit exchanges information with the micro-control unit through the radio frequency module, and the roadside unit sends the collected road condition information and driving information to the micro-control unit of the vehicle-mounted OBU device. Among them, the road condition information includes the weather conditions, traffic flow information, traffic accident information and congestion information of the target road section, and the driving information includes the speed information and positioning information of the vehicle where the vehicle-mounted OBU device is located.

[0034] Finally, the micro control unit sends the road condition information and driving information that need to be voice broadcast to the voice submodule, and the voice submodule broadcasts it. It is understandable that the voice submodule can adopt an existing electronic device with a voice broadcast function, such as a voice broadcaster.

[0035] The vehicle-mounted OBU device provided by the embodiment of the utility model, when a car passes through a gantry or a toll station, receives the road condition information and driving information collected by the roadside unit through the radio frequency module of the vehicle-mounted OBU device, and voice broadcasts the road condition information and driving information through the voice submodule, so that the driver and passengers can understand the relevant information without observing the OBU display screen, thereby improving driving safety.

[0036] Figure 2 Another structural diagram of a vehicle-mounted OBU device provided by the utility model is as follows Figure 2 As shown, in a preferred embodiment, the vehicle-mounted OBU device further includes an embedded security module ESAM, and the embedded security module ESAM is connected to the micro control unit.

[0037] Specifically, the Embedded Secure Access Module (ESAM) is able to authenticate the OBU, ensuring that only legitimate devices can access the vehicle communication system. This helps prevent unauthorized device intrusions and ensures that the system only communicates with trusted devices. The embedded security module is also used to store and manage security keys used to encrypt and decrypt communication data. By ensuring the security of the keys, the ESAM helps prevent unauthorized access and data leakage.

[0038] The vehicle-mounted OBU device provided by the embodiment of the utility model provides functions such as identity authentication and data encryption through ESAM, thereby improving the security and stability of the vehicle-mounted OBU device.

[0039] In a preferred embodiment, Figure 2 As shown, the vehicle-mounted OBU device also includes:

[0040] The display module is connected to the micro control unit and is used to display the information acquired by the micro control unit.

[0041] In this embodiment, the display module can adopt a liquid crystal display screen. The occupants of the vehicle can know the road condition information and driving information obtained by the micro control unit at any time through the display module of the vehicle-mounted OBU device, thereby improving the convenience of the vehicle-mounted OBU device.

[0042] In a preferred embodiment, Figure 2 As shown, the micro control unit includes a wake-up circuit, and the wake-up circuit is connected to the radio frequency module. The wake-up circuit wakes up the micro control unit when receiving the radio frequency signal transmitted by the radio frequency module, so that the micro control unit is restored from the low power consumption mode to the normal working mode. Among them, the wake-up circuit adopts the existing wake-up circuit structure.

[0043] The utility model sets a wake-up circuit so that the microcontroller unit MCU can switch to a normal working mode when communication is required, and enter a low power consumption mode when communication is not required, so as to prolong battery life and reduce device power consumption.

[0044] In a preferred embodiment, Figure 2 As shown, the microcontroller unit also includes an RFID data transceiver port, and the RFID data transceiver port is connected to the radio frequency module. In this embodiment, data transmission between the microcontroller unit MCU and the radio frequency module is achieved through the RFID (Radio-Frequency Identification) data transceiver port.

[0045] The microcontroller unit also includes an I / O interface, and the microcontroller unit is connected to the function expansion module through the I / O interface. The I / O interface (Input / Output Interface) is an input / output device interface. In this embodiment, the microcontroller unit is connected to the function expansion module through the I / O interface to achieve function expansion of the vehicle-mounted OBU device.

[0046] Furthermore, the microcontroller unit also includes a UART (Universal Asynchronous Receiver and Transmitter) interface, a JTAG (Joint Test Action Group) interface, a BSL (Bootstrap Loader) interface and a USB (Universal Serial Bus) interface.

[0047] In a preferred embodiment, if Figure 2 As shown, the function expansion module also includes a camera module, which is connected to the micro control unit and is used to collect video images around the vehicle.

[0048] In this embodiment, the camera module can use a camera model DS-2PT7D40IW. The vehicle-mounted OBU device realizes the function of a vehicle-mounted driving recorder by expanding the camera, and collects video images around the vehicle through the camera module to provide evidence for traffic accidents.

[0049] In a preferred embodiment, if Figure 2 As shown, the function expansion module also includes a positioning submodule, which is connected to the micro control unit and is used to detect the location information of the vehicle-mounted OBU device. Preferably, the positioning submodule is a Beidou positioning device or a GPS positioning device.

[0050] In this embodiment, the positioning submodule can use the gf07 locator, and the vehicle positioning and navigation are realized through the positioning submodule. When the vehicle encounters danger and sends an alarm message, the positioning information is sent at the same time, so as to realize the rapid positioning of the vehicle and improve the safety performance of the vehicle-mounted OBU equipment.

[0051] Figure 3 The information interaction diagram of the vehicle-road cooperative system provided by the utility model is as follows: Figure 3As shown, the vehicle-mounted OBU device is applied to the vehicle-road cooperative system, which includes a cloud, a roadside and a terminal. The cloud is a V2X cloud service platform, the roadside includes a roadside system and multiple edge computing units, and the terminal includes a vehicle-mounted OBU device. The roadside system is communicated with the V2X cloud service platform and the vehicle-mounted OBU device respectively.

[0052] Specifically, when the vehicle-mounted OBU device passes through the gantry or interacts with the roadside system, the V2X cloud service platform will analyze and process the acquired road section information, and then transmit it to the vehicle-mounted unit through the gantry RSU or roadside unit to realize the information interaction of vehicle-road collaboration. The roadside system obtains environmental information and road condition information through the perception unit, and after processing the relevant information through the edge computing unit, it transmits the road condition information of the road section and the vehicle's driving information to the V2X cloud service platform. After the platform summarizes the information, when the vehicle passes the roadside unit, it sends the road condition information and driving information to the vehicle-mounted OBU device.

[0053] Furthermore, after the MCU of the on-board OBU device receives the road condition information and driving information, it transmits the information that needs to be voice broadcast to the voice sub-module through the I / O interface, and broadcasts the traffic accident information and congestion information of the road ahead through the voice sub-module. The driver can judge whether to change the route by himself, realize beyond-visual-range warning and traffic information broadcast, and improve the driver's user experience.

[0054] It should be noted that, in this article, the terms "include", "comprises" or any other variations 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 includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. 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 the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the utility model can be understood according to the specific circumstances.

[0055] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present invention should be included in the protection scope of the present invention.

Claims

1. A vehicle-mounted OBU device, characterized in that: It includes a micro control unit, and a radio frequency module, a power module and a function expansion module connected to the micro control unit; The radio frequency module is used for data communication with the roadside unit; The micro control unit is used to exchange information with the roadside unit through the radio frequency module; The power module is used to supply power to the on-board OBU device; The function extension module includes a voice submodule, and the voice submodule is used to play the voice signal of the vehicle-mounted OBU device; The function expansion module also includes a camera module, which is connected to the micro control unit and is used to collect video images around the vehicle.

2. The vehicle-mounted OBU device according to claim 1, characterized in that: The vehicle-mounted OBU device further comprises an embedded security module ESAM, and the embedded security module ESAM is connected to the micro control unit.

3. The vehicle-mounted OBU device according to claim 1, characterized in that: The vehicle-mounted OBU device also includes: The display module is connected to the micro control unit and is used to display the information acquired by the micro control unit.

4. The vehicle-mounted OBU device according to claim 1, characterized in that: The micro control unit includes a wake-up circuit, which is connected to the radio frequency module. The wake-up circuit is used to wake up the micro control unit when receiving a radio frequency signal transmitted by the radio frequency module.

5. The vehicle-mounted OBU device according to claim 4, characterized in that: The micro control unit also includes an RFID data transceiver port, and the RFID data transceiver port is connected to the radio frequency module.

6. The vehicle-mounted OBU device according to claim 5, characterized in that: The micro control unit also includes an I / O interface, and the micro control unit is connected to the function expansion module via the I / O interface.

7. The vehicle-mounted OBU device according to claim 6, characterized in that: The micro control unit also includes a UART interface, a JTAG interface, a BSL interface and a USB interface.

8. The vehicle-mounted OBU device according to claim 1, characterized in that: The function expansion module also includes a positioning submodule, which is connected to the micro control unit and is used to detect the position information of the vehicle-mounted OBU device.

9. The vehicle-mounted OBU device according to claim 8, characterized in that: The positioning submodule is a Beidou positioning device or a GPS positioning device.

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