ETC intelligent OBU device based on WIFI, Bluetooth, GNSS positioning and mobile network

Abstract

The invention relates to an ETC intelligent OBU device based on WIFI, Bluetooth, GNSS positioning and a mobile network. The ETC intelligent OBU device comprises an MCU, a power module, a 5.8 G transceiver, a 13.56 transceiver, a Bluetooth module and a wireless communication module, and the wireless communication module comprises a Beidou module, a 4G module, a WIFI module, an inertial sensor and a magnetometer. While the non-stop charging, highway path information punctuation writing, convenient recharging and display and buzzer prompting of an automobile on an ETC channel are realized, inertial data and magnetometer data of an OBU device are obtained through an inertial sensor and a magnetometer, and whether an emergency alarm event exists or not can be judged based on the inertial data and the magnetometer data. And cloud alarm reminding is carried out when alarm abnormity exists, so that the vehicle safety is guaranteed to a certain extent. According to the OBU device, the wireless communication function is added, on the premise that the OBU device is convenient to use, the wireless communication function can be fully utilized to provide a cloud alarm function for a vehicle where the OBU device is installed, and convenience is brought to an OBU device user.

Description

Technical Field

[0001] The present invention relates to the technical field related to ETC, and in particular to an ETC intelligent OBU device based on WIFI, Bluetooth, GNSS positioning and mobile network. Background Art

[0002] An OBU, or on-board electronic tag, is a microwave device mounted on a car's windshield. When a vehicle approaches a toll booth, it automatically identifies the vehicle and electronically deducts the toll, allowing the vehicle to pass through the booth without stopping.

[0003] Most OBUs currently on the market are designed solely for ETC functions, communicating with RSUs and card readers to complete transactions. Due to hardware limitations, traditional OBU software updates are infrequent. New functional requirements, such as support for new toll collection methods or collaboration with other intelligent transportation systems, are difficult to implement through software upgrades and often require complete hardware replacement. Furthermore, their limited wireless communication capabilities make them inadequate for today's market demands. Summary of the Invention

[0004] The purpose of the present invention is to solve at least one of the deficiencies of the prior art and to provide an ETC intelligent OBU device based on WIFI, Bluetooth, GNSS positioning and mobile network.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: Specifically, an ETC intelligent OBU device based on WIFI, Bluetooth, GNSS positioning, and mobile network is proposed, including the following: MCU; A power module is electrically connected to the MCU and is used to supply power to the entire OBU device; A 5.8G transceiver, electrically connected to the MCU and configured to communicate with a drive test unit (RSU); 13.56 transceiver, electrically connected to the MCU, for communicating with the drive test card reader; A Bluetooth module, electrically connected to the MCU, for providing Bluetooth functionality for the OBU device; A wireless communication module, comprising a Beidou module, a 4G module, and a WIFI module. The 4G module is connected to the MCU via a serial port, the Beidou module is connected to the 4G module via a serial port, and the WIFI module is connected to the 4G module via an SDI interface. The WIFI module is used to provide a hotspot function. An inertial sensor and a magnetometer are electrically connected to the MCU and are used to obtain inertial data and magnetometer data of the OBU device; After receiving the inertial data and magnetometer data, the MCU determines whether there is an emergency alarm event based on the inertial data and magnetometer data. If so, it obtains the user's real-time location information from the Beidou module through the 4G module, obtains vehicle information from the MCU, and sends the real-time location information and vehicle information to the cloud for alarm.

[0006] Furthermore, specifically, the power module includes: A charging management module is provided with an external emergency charging interface, and the charging management module is connected to a battery pack composed of lithium batteries, and the battery pack is electrically connected to the MCU and provides power for the MCU.

[0007] Furthermore, the OBU device is also provided with an OBE-SAM module, which is used to ensure the information security of the OBU device and supports 3DES and SM4 cryptographic algorithms.

[0008] Furthermore, the OBU device is also provided with: LED indicator, used to light up when receiving a response command from the MCU; LCD display module, used to display corresponding content according to pre-set settings; Buzzer, used to trigger an alarm reminder when receiving an alarm command from the MCU; The anti-tamper module is used to provide anti-tamper protection for the logic circuit of the OBU device.

[0009] Further, specifically, after receiving the inertial data and the magnetometer data, the MCU determines whether there is an emergency alarm event based on the inertial data and the magnetometer data, including: Obtain the acceleration in the three axes of the inertial data , , , perform coordinate rotation transformation on the magnetometer data to align it with the geographic coordinate system to obtain the transformed magnetometer data, and obtain the two components of the transformed magnetometer data on the horizontal plane. as well as ; Calculate the pitch angle, , Calculate the roll angle roll, , Calculate the heading angle yaw, , Calculate the acceleration vector magnitude SVM, , If SVM is greater than 2.5g and pitch is greater than , yaw is greater than , determine whether the vehicle where the OBU device is set is in danger of collision; If SVM is greater than 2g and roll is less than , pitch is less than , determine whether the vehicle set by the OBU device has excessive braking danger; Where g is the acceleration due to gravity, Collision hazards and excessive braking hazards together constitute emergency warning events.

[0010] The present invention also proposes a vehicle-mounted OBU system, which applies the ETC intelligent OBU device based on WIFI, Bluetooth, GNSS positioning, and mobile network, including: An ETC entry antenna, communicatively connected to the OBU device, is used to write entry information to the OBE-SAM module on the OBU device; A marking antenna is communicatively connected to the OBU device, and is used to mark the OBU device traveling within the range of the marking antenna to obtain marking information, and write the marking information into the OBU device; The ETC exit antenna is connected to the OBU device for calculating the travel cost of the relevant information sent by the OBU device and performing accounting transactions, and clearing all entry information and marking information when the transaction is successful.

[0011] The beneficial effects of the present invention are: The present invention proposes an ETC intelligent OBU device based on Wi-Fi, Bluetooth, GNSS positioning, and a mobile network. While enabling functions such as non-stop toll collection on ETC lanes, high-speed route information punctuation, convenient top-up, and prompts of corresponding behavior information via a display and buzzer, the device also acquires inertial and magnetometer data from the OBU device through an inertial sensor and magnetometer. Based on these inertial and magnetometer data, the device can determine whether an emergency alarm event exists and, if an alarm anomaly occurs in the vehicle where the OBU device is installed, issue a cloud-based alarm reminder, thereby ensuring vehicle safety to a certain extent. The present invention adds a wireless communication function to the OBU device, facilitating its use while also fully utilizing the wireless communication function to provide cloud-based alarms for vehicles where the OBU device is installed, bringing convenience to OBU users. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The above and other features of the present disclosure will become more apparent through a detailed description of the embodiments shown in conjunction with the accompanying drawings. The same reference numerals in the drawings of the present disclosure represent the same or similar elements. Obviously, the drawings described below are only some embodiments of the present disclosure. It is possible for a person skilled in the art to derive other drawings based on these drawings without inventive effort. In the drawings: Figure 1 The figure shows a block diagram of the structure of an ETC intelligent OBU device based on WIFI, Bluetooth, GNSS positioning, and mobile network of the present invention; Figure 2 The figure shows a system architecture diagram of a vehicle-mounted OBU system that applies an ETC intelligent OBU device based on WIFI, Bluetooth, GNSS positioning, and mobile network of the present invention. DETAILED DESCRIPTION

[0013] The following will be combined with the embodiments and drawings to clearly and completely describe the concept, specific structure and technical effects of the present invention so as to fully understand the purpose, scheme and effect of the present invention. It should be noted that the embodiments and features in the embodiments of this application can be combined with each other unless there is a conflict. The same reference numerals used throughout the drawings indicate the same or similar parts.

[0014] Example 1, with reference to Figure 1 as well as Figure 2 The present invention proposes an ETC intelligent OBU device based on WIFI, Bluetooth, GNSS positioning, and mobile network, including the following: MCU; A power module is electrically connected to the MCU and is used to supply power to the entire OBU device; A 5.8G transceiver, electrically connected to the MCU and configured to communicate with a drive test unit (RSU); 13.56 transceiver, electrically connected to the MCU, for communicating with the drive test card reader; A Bluetooth module, electrically connected to the MCU, for providing Bluetooth functionality for the OBU device; A wireless communication module, comprising a Beidou module, a 4G module, and a WIFI module. The 4G module is connected to the MCU via a serial port, the Beidou module is connected to the 4G module via a serial port, and the WIFI module is connected to the 4G module via an SDI interface. The WIFI module is used to provide a hotspot function. An inertial sensor and a magnetometer are electrically connected to the MCU and are used to obtain inertial data and magnetometer data of the OBU device; After receiving the inertial data and magnetometer data, the MCU determines whether there is an emergency alarm event based on the inertial data and magnetometer data. If so, it obtains the user's real-time location information from the Beidou module through the 4G module, obtains vehicle information from the MCU, and sends the real-time location information and vehicle information to the cloud for alarm.

[0015] In this embodiment 1, while enabling functions such as non-stop toll collection on ETC channels, high-speed route information punctuation, convenient top-up, and prompting corresponding behavior information on a display and buzzer, the inertial sensor and magnetometer acquire inertial data and magnetometer data from the OBU device. Based on the inertial data and magnetometer data, the system can determine whether an emergency alarm event exists and issue a cloud-based alarm reminder when an alarm anomaly occurs in the vehicle where the OBU device is installed, thereby ensuring vehicle safety to a certain extent. The present invention adds a wireless communication function to the OBU device. While facilitating the use of the OBU device, it can also fully utilize the wireless communication function to provide a cloud-based alarm function for the vehicle where the OBU device is installed, bringing convenience to the OBU device user.

[0016] As a preferred embodiment of the present invention, specifically, the power module includes: A charging management module is provided with an external emergency charging interface, and the charging management module is connected to a battery pack composed of lithium batteries, and the battery pack is electrically connected to the MCU and provides power for the MCU.

[0017] As a preferred embodiment of the present invention, the OBU device is further provided with an OBE-SAM module, which is used to ensure the information security of the OBU device. The OBE-SAM module supports 3DES and SM4 cryptographic algorithms.

[0018] As a preferred embodiment of the present invention, the OBU device is further provided with, LED indicator, used to light up when receiving a response command from the MCU; LCD display module, used to display corresponding content according to pre-set settings; Buzzer, used to trigger an alarm reminder when receiving an alarm command from the MCU; The anti-tamper module is used to provide anti-tamper protection for the logic circuit of the OBU device.

[0019] In specific applications, the circuit board adopts a dual-board card mode design, which is divided into PCB1: including all functions of the dual-chip OBU; PCB2: including 4G module, Beidou module, and WIFI module.

[0020] 4G module: Adopts AI-LT32S communication module to exchange data with the background through 4G signal.

[0021] WIFI module: Adopts Ailian WF-A211-RTA1 module, supports 20MHz bandwidth and 72.2Mbps transmission rate, and provides WIFI hotspot function for passengers on the vehicle.

[0022] MCU: Lingdongwei MM32F0144 32-bit processor Bluetooth module: Yizhaowei YC1021, serial port communication, supports Bluetooth 4.0.

[0023] 4.2.1 Main control MCU: MCU uses Lingdongwei MM32F0144, chip features: Equipped with Arm® Cortex®-M0 core, the maximum operating frequency can reach 72MHz, 64K flash memory, 8K SRAM, sleep power consumption as low as 1.5uA.

[0024] 4.2.2 Wireless Communication: 4.2.2.1 5.8G Communication The 5.8GHz communication chip uses the BK5824 chip from Broadcom Integrated, a high-performance 5.8GHz communication chip designed by Broadcom specifically for OBUs. Sleep current is less than or equal to 4uA Wake-up sensitivity better than -63dBm Receiving sensitivity better than -85dBm Maximum transmit power 7dBm 4.2.2.2 13.56M Communication Broadcom Integrated's BK1308 chip.

[0025] 4.2.3 Bluetooth Communication It uses Yizhaowei's YC1021, which supports the BLE4.0 protocol.

[0026] Internally integrated 2.4GHz Transceiver, 32-bit RISC Core processor, 4M flash, 24KB RAM Equipped with universal interfaces such as I2C, SPI, and UART, it can flexibly exchange data with the main control MCU It also supports OTA upgrades, which can upgrade the firmware of the Bluetooth module itself and the firmware of the main control MCU. 4.2.4 4G Communication Module AI-LT32S LTE Band: LTE-FDD:B1 / B3 / B5 / B8 LTE-TDD:B34 / B38 / B39 / B40 / B41 4.2.5 Beidou Positioning Module (TAU812S): 4.2.5 WIFI module (WF-A211-RTA1): As a preferred embodiment of the present invention, specifically, after receiving the inertial data and the magnetometer data, the MCU determines whether there is an emergency alarm event based on the inertial data and the magnetometer data, including: Obtain the acceleration in the three axes of the inertial data , , , perform coordinate rotation transformation on the magnetometer data to align it with the geographic coordinate system to obtain the transformed magnetometer data, and obtain the two components of the transformed magnetometer data on the horizontal plane. as well as ; Calculate the pitch angle, , Calculate the roll angle roll, , Calculate the heading angle yaw, , Calculate the acceleration vector magnitude SVM, , If SVM is greater than 2.5g and pitch is greater than , yaw is greater than , determine whether the vehicle where the OBU device is set is in danger of collision; If SVM is greater than 2g and roll is less than , pitch is less than , determine whether the vehicle set by the OBU device has excessive braking danger; Where g is the acceleration due to gravity, Collision hazards and excessive braking hazards together constitute emergency warning events.

[0027] In this preferred embodiment, considering that the OBU is associated with vehicle driving, the relevant data obtained by the added inertial sensor and magnetometer are used to determine whether there is a collision hazard and excessive braking hazard. At the same time, the 4G module is called to send the real-time location information and vehicle information to the cloud for alarm. The cloud will carry out subsequent communication and coordination work, which can ensure the driving safety of the associated vehicles of the OBU device to a certain extent.

[0028] The present invention also proposes a vehicle-mounted OBU system, which applies the ETC intelligent OBU device based on WIFI, Bluetooth, GNSS positioning, and mobile network, including: An ETC entry antenna, communicatively connected to the OBU device, is used to write entry information to the OBE-SAM module on the OBU device; A marking antenna is communicatively connected to the OBU device, and is used to mark the OBU device traveling within the range of the marking antenna to obtain marking information, and write the marking information into the OBU device; The ETC exit antenna is connected to the OBU device for calculating the travel cost of the relevant information sent by the OBU device and performing accounting transactions, and clearing all entry information and marking information when the transaction is successful.

[0029] Among them, the OBU device is associated with a terminal device / user card: it is held by the ETC card user. The ETC card user can use the terminal to consume on the road section. The user information and the amount of consumption are loaded on the ETC card. In addition, the functional modules in various embodiments of the present invention may be integrated into a single processing module, or each module may exist physically separately, or two or more modules may be integrated into a single module. The aforementioned integrated modules may be implemented in the form of hardware or software functional modules.

[0030] If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present invention implements all or part of the process in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium, and the computer program can implement the steps of the above-mentioned various method embodiments when executed by the processor. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may include: any entity or system that can carry the computer program code, recording medium, U disk, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electrical carrier signal, telecommunication signal and software distribution medium, etc.

[0031] Although the present invention has been described in considerable detail and with particularity with respect to several described embodiments, it is not intended to be limited to any of these details or embodiments or any particular embodiment, but rather should be construed as providing a broad possible interpretation of these claims in view of the prior art by reference to the appended claims, thereby effectively encompassing the intended scope of the invention. In addition, the invention has been described above in terms of embodiments foreseen by the inventors for the purpose of providing a useful description, and those insubstantial modifications of the invention that are not currently foreseen may still represent equivalent modifications of the invention.

[0032] The above description is merely a preferred embodiment of the present invention. The present invention is not limited to the above-described embodiments. As long as the technical effects of the present invention are achieved by the same means, they shall fall within the scope of protection of the present invention. Within the scope of protection of the present invention, various modifications and variations of the technical solutions and / or implementation methods may be made.

Claims

1. An ETC intelligent OBU device based on WIFI, Bluetooth, GNSS positioning, and mobile network, characterized in that: These include: MCU; A power module is electrically connected to the MCU and is used to supply power to the entire OBU device; A 5.8G transceiver, electrically connected to the MCU and configured to communicate with a drive test unit (RSU); 13.56 transceiver, electrically connected to the MCU, for communicating with the drive test card reader; A Bluetooth module, electrically connected to the MCU, for providing Bluetooth functionality for the OBU device; A wireless communication module, comprising a Beidou module, a 4G module, and a WIFI module. The 4G module is connected to the MCU via a serial port, the Beidou module is connected to the 4G module via a serial port, and the WIFI module is connected to the 4G module via an SDI interface. The WIFI module is used to provide a hotspot function. An inertial sensor and a magnetometer are electrically connected to the MCU and are used to obtain inertial data and magnetometer data of the OBU device; After receiving the inertial data and magnetometer data, the MCU determines whether there is an emergency alarm event based on the inertial data and magnetometer data. If so, it obtains the user's real-time location information from the Beidou module through the 4G module, obtains vehicle information from the MCU, and sends the real-time location information and vehicle information to the cloud for alarm.

2. An ETC intelligent OBU device based on WIFI, Bluetooth, GNSS positioning, and mobile network according to claim 1, characterized in that: Specifically, the power module includes: A charging management module is provided with an external emergency charging interface, and the charging management module is connected to a battery pack composed of lithium batteries, and the battery pack is electrically connected to the MCU and provides power for the MCU.

3. An ETC intelligent OBU device based on WIFI, Bluetooth, GNSS positioning, and mobile network according to claim 1, characterized in that: The OBU device is also provided with an OBE-SAM module, which is used to ensure the information security of the OBU device. The OBE-SAM module supports 3DES and SM4 cryptographic algorithms.

4. An ETC intelligent OBU device based on WIFI, Bluetooth, GNSS positioning, and mobile network according to claim 1, characterized in that: The OBU device is also provided with: LED indicator, used to light up when receiving a response command from the MCU; LCD display module, used to display corresponding content according to pre-set settings; Buzzer, used to trigger an alarm reminder when receiving an alarm command from the MCU; The anti-tamper module is used to provide anti-tamper protection for the logic circuit of the OBU device.

5. An ETC intelligent OBU device based on WIFI, Bluetooth, GNSS positioning, and mobile network according to claim 1, characterized in that: Specifically, after receiving the inertial data and the magnetometer data, the MCU determines whether there is an emergency alarm event based on the inertial data and the magnetometer data, including: Obtain the acceleration in the three axes of the inertial data , , , perform coordinate rotation transformation on the magnetometer data to align it with the geographic coordinate system to obtain the transformed magnetometer data, and obtain the two components of the transformed magnetometer data on the horizontal plane. as well as ; Calculate the pitch angle, , Calculate the roll angle roll, , Calculate the heading angle yaw, , Calculate the acceleration vector magnitude SVM, , If SVM is greater than 2.5g and pitch is greater than , yaw is greater than , determine whether the vehicle where the OBU device is set is in danger of collision; If SVM is greater than 2g and roll is less than , pitch is less than , determine whether the vehicle set by the OBU device has excessive braking danger; Where g is the acceleration due to gravity, Collision hazards and excessive braking hazards together constitute emergency warning events.

6. The vehicle-mounted OBU system is characterized by: An ETC intelligent OBU device based on WIFI, Bluetooth, GNSS positioning, and mobile network as described in any one of claims 1 to 5 is applied. include, An ETC entry antenna, communicatively connected to the OBU device, is used to write entry information to the OBE-SAM module on the OBU device; A marking antenna is communicatively connected to the OBU device, and is used to mark the OBU device traveling within the range of the marking antenna to obtain marking information, and write the marking information into the OBU device; The ETC exit antenna is connected to the OBU device for calculating the travel cost of the relevant information sent by the OBU device and performing accounting transactions, and clearing all entry information and marking information when the transaction is successful.

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