Vehicle-mounted positioning terminal

Abstract

The utility model discloses a kind of vehicle-mounted positioning terminal. Vehicle-mounted positioning terminal includes: main control module, navigation positioning module, electronic toll module and power management module, main control module is provided with antenna interface, and antenna interface is used to connect communication antenna;Main control module is further provided with first transceiving transmission interface, navigation positioning module connects first transceiving transmission interface, and navigation positioning module is used to connect navigation satellite, to carry out satellite positioning;Main control module is further provided with second transceiving transmission interface, and electronic toll module connects second transceiving transmission interface, and first transceiving transmission interface and second transceiving transmission interface are set on the same side of main control module, and antenna interface and first transceiving transmission interface are set on the two sides of main control module;Main control module is further provided with power pin, and power management module connects power pin, and power management is used to power supply each module. The technical scheme of the application can effectively realize communication and positioning simultaneously, improve the fine management to vehicle.

Description

Technical Field

[0001] This utility model relates to the field of vehicle electronic device technology, specifically to a vehicle positioning terminal. Background Technology

[0002] With the continuous upgrading of intelligent transportation and vehicle management needs, the role of in-vehicle electronic devices in improving traffic efficiency and ensuring driving safety is becoming increasingly prominent. Among these, in-vehicle communication and in-vehicle positioning are two key functions. In-vehicle communication enables data interaction between the vehicle and the back-end management platform, supporting operations such as uploading transaction data and transmitting vehicle status information. In-vehicle positioning uses satellite positioning technology to obtain the real-time location of the vehicle, meeting the application requirements of trajectory recording, navigation guidance, and dispatch management.

[0003] However, current in-vehicle electronic devices on the market often have limited functionality, such as only having communication capabilities or only having positioning capabilities. This causes many inconveniences for users and operators. On the one hand, if users need to meet both communication and positioning requirements, they need to purchase two separate sets of devices, which not only increases equipment procurement costs but also requires two installations and wiring in the vehicle, occupying more vehicle space. On the other hand, there is no data exchange channel between the independent devices, and communication data and positioning data cannot be linked in real time. This makes it difficult for the back-end management platform to synchronously obtain the linkage information of vehicle location and data transmission, affecting the refined decision-making and management of vehicles. Utility Model Content

[0004] In view of the shortcomings of the existing technology, this utility model provides a vehicle positioning terminal that can effectively realize communication and positioning at the same time, thereby improving the refined management of vehicles.

[0005] This application provides a vehicle-mounted positioning terminal, which includes: a main control module, the main control module being provided with an antenna interface, the antenna interface being used to connect a communication antenna;

[0006] The navigation and positioning module, the main control module is further provided with a first transceiver interface, the navigation and positioning module is connected to the first transceiver interface, and the navigation and positioning module is used to connect to navigation satellites for satellite positioning;

[0007] The electronic toll collection module, the main control module is further provided with a second transceiver interface, the electronic toll collection module is connected to the second transceiver interface, the first transceiver interface and the second transceiver interface are located on the same side of the main control module, and the antenna interface and the first transceiver interface are located on opposite sides of the main control module;

[0008] The main control module is also provided with a power management module, which is connected to the power management module and is used to supply power to each module.

[0009] In one aspect, the electronic toll collection module includes:

[0010] Microcontroller unit;

[0011] An encryption unit, connected to the microcontroller unit, is used to encrypt data;

[0012] Anti-tamper circuit, which is connected to the microcontroller unit, is used to detect unauthorized disassembly;

[0013] The radio frequency unit is connected to the microcontroller unit and is used to communicate with roadside equipment to realize electronic transaction data communication.

[0014] A Bluetooth unit, which is connected to the microcontroller unit, is used for data interaction with external mobile devices;

[0015] A buzzer, connected to the microcontroller unit, is used to provide audible prompts under the control of the microcontroller unit.

[0016] In one aspect, the encryption unit includes at least three independent encryption channels, which are respectively used to encrypt electronic transaction data, device identity information, and satellite positioning data.

[0017] In one aspect, the anti-tamper circuit is connected to the wake-up pin of the microcontroller unit. When unauthorized disassembly is detected, the wake-up pin is triggered, causing the microcontroller unit and the main control module to enter a security protection mode.

[0018] In one aspect, the main control module is also equipped with an integrated bus interface, which is used to connect on-board sensors to collect vehicle motion status data.

[0019] In one aspect, the vehicle positioning terminal also includes a backup battery, which is connected to the power switch pin of the main control module, and the other end of the backup battery is connected to the power management module.

[0020] In one aspect, the power management module includes a filtering circuit for filtering high-frequency interference signals in the power supply.

[0021] In one aspect, at least one of the main control module and the navigation and positioning module is externally provided with a shield.

[0022] In one aspect, a common-mode inductor is provided at the location of both the antenna interface and the first transceiver interface.

[0023] In one aspect, the power management module further includes a current and voltage sampling unit and a power supply regulation unit;

[0024] The current and voltage sampling unit is connected to the sampling pin of the main control module to collect the operating current and power supply voltage data of the main control module and the navigation and positioning module;

[0025] The power supply regulation unit is signal-connected to the current and voltage sampling unit, and is electrically connected to the power supply pin of the main control module and the power control terminal of the navigation and positioning module.

[0026] When the current and voltage sampling unit detects that the operating current of the main control module is lower than the set load threshold, the power supply adjustment unit lowers the power supply voltage of the main control module.

[0027] When the vehicle is detected to be stationary and there is no need for positioning, the power supply adjustment unit cuts off the power supply to the power control terminal of the navigation and positioning module. When a positioning need is detected, the power supply adjustment unit wakes up the power supply to the power control terminal.

[0028] The beneficial effects of this utility model are reflected in the following aspects: It integrates the main control module and antenna interface for communication, the navigation and positioning module and first transceiver interface for positioning, and the electronic toll collection module and second transceiver interface for electronic toll collection into a single vehicle positioning terminal. This reduces the need for independently purchased multiple devices, lowers procurement and installation costs, and reduces vehicle space occupation. Simultaneously, the main control module, as the core module, coordinates the reception of positioning data from the navigation and positioning module and transaction data from the electronic toll collection module, and completes communication data transmission through the antenna interface, achieving real-time correlation of the three types of data. This provides location, transaction, and communication linkage information for refined backend management. Furthermore, the power management module provides unified power to all modules through the main control module's power pins, avoiding the problems of low reliability and high power consumption caused by dispersed power supplies in independent devices. This improves the refined management of vehicles. Attached Figure Description

[0029] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0030] Figure 1 This is a schematic diagram of the vehicle-mounted positioning terminal of this application. Detailed Implementation

[0031] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0032] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application shall have the ordinary meaning as understood by one of ordinary skill in the art to which this utility model pertains.

[0033] like Figure 1 As shown, this application provides a vehicle-mounted positioning terminal, which includes: a main control module 100, a navigation and positioning module 200, an electronic toll collection module 300, and a power management module 400.

[0034] The main control module 100 is equipped with an antenna interface for connecting a communication antenna. The main control module 100 integrates multiple interfaces to achieve unified management of other modules. The antenna interface can directly connect to a communication antenna, such as a 4G or 5G antenna, to establish a communication link between the vehicle-mounted positioning terminal and the external environment, ensuring data transmission operations such as uploading transaction data and transmitting location information.

[0035] The main control module 100 is also equipped with a first transceiver interface. The navigation and positioning module 200 is connected to the first transceiver interface and is used to connect to navigation satellites for satellite positioning. The navigation and positioning module 200 establishes a data interaction channel with the main control module 100 through its connection with the first transceiver interface. The navigation and positioning module 200 can directly interface with navigation satellites, such as the BeiDou Navigation Satellite System and the GPS system, to receive satellite signals in real time and complete positioning calculations, obtaining location and motion status data such as the vehicle's longitude, latitude, altitude, and speed. The acquired positioning data is synchronously transmitted to the main control module 100 through the first transceiver interface, providing a location reference for functions such as transaction location verification by the electronic toll collection module 300 and vehicle trajectory tracking by the back-end management platform, thus achieving data linkage.

[0036] The main control module 100 is also equipped with a second transceiver interface. The electronic toll collection module 300 is connected to the second transceiver interface. The first and second transceiver interfaces are located on the same side of the main control module 100, while the antenna interface and the first transceiver interface are located on opposite sides of the main control module 100. The electronic toll collection module 300 receives instructions and provides data feedback to the main control module 100 through its connection to the second transceiver interface. The electronic toll collection module 300 can wirelessly communicate with roadside equipment to complete vehicle identification, toll calculation, and toll deduction instruction transmission. During the transaction process, the electronic toll collection module 300 transmits the transaction data to the main control module 100 through the second transceiver interface and associates it with the real-time positioning data provided by the navigation and positioning module 200. This ensures the convenience of the transaction process and verifies the authenticity of the transaction scenario through positioning data, avoiding the problems of isolated transaction data and lack of scenario verification in traditional independent ETC devices.

[0037] The main control module 100 is also equipped with power pins, and the power management module 400 is connected to these power pins. The power management module 400 is used to supply power to all modules. The power management module 400 is the energy guarantee for the stable operation of all modules of the vehicle positioning terminal. By connecting to the power pins of the main control module 100, a unified power supply is established. The power management module 400 can be connected to the vehicle power supply and outputs a stable power supply voltage and current according to the working requirements of the main control module 100, the navigation and positioning module 200, and the electronic toll collection module 300.

[0038] In this embodiment, the main control module 100 and antenna interface for communication, the navigation and positioning module 200 and first transceiver interface for positioning, and the electronic toll collection module 300 and second transceiver interface for electronic toll collection are integrated into the same vehicle positioning terminal. This reduces the need for independently purchased multiple devices, lowers procurement and installation costs, and reduces vehicle space occupancy. Simultaneously, the main control module 100, as the core module, coordinates the reception of positioning data from the navigation and positioning module 200 and transaction data from the electronic toll collection module 300, and completes communication data transmission through the antenna interface, achieving real-time correlation of the three types of data. This provides location, transaction, and communication linkage information for refined backend management. Furthermore, the power management module 400 provides unified power to all modules through the power pins of the main control module 100, avoiding the problems of low reliability and high power consumption caused by dispersed power supplies for independent devices. This improves the refined management of the vehicle.

[0039] Furthermore, the signals received by the communication antenna and the signals received by satellite positioning may interfere in certain situations. To reduce interference, the antenna interface and the first transceiver interface are located on opposite sides of the main control module 100. Simultaneously, the navigation and positioning module 200 is integrated into the same main control module 100 for unified control via the first transceiver interface, and the electronic toll collection module 300 is integrated into the same main control module 100 for unified control. This reduces signal interference from both the signal transmission path and physical distance perspectives. On one hand, the separate placement of the antenna interface and the first transceiver interface on opposite sides of the main control module 100 ensures that the signal transmission links between the communication antenna and the navigation and positioning module 200 maintain maximum physical distance, avoiding crosstalk caused by adjacent interfaces. On the other hand, both types of signals are centrally managed through the main control module 100, eliminating the need for external wiring connections as with traditional independent devices, reducing crosstalk in complex wiring. Furthermore, the main control module 100 can further weaken the mutual influence between the two types of signals through internal circuit design, achieving low-interference or non-interference transmission of communication signals and satellite positioning signals, ensuring the stable operation of the terminal's communication and positioning functions.

[0040] In one embodiment of this application, the electronic toll collection module 300 includes: a microcontroller unit, an encryption unit, an anti-tamper circuit, a radio frequency unit, a Bluetooth unit, and a buzzer.

[0041] The encryption unit connects to the microcontroller unit and is used to encrypt data. Directly connected to the microcontroller unit, during ETC (Electronic Toll Collection) transactions, when the microcontroller unit receives vehicle location data transmitted from the navigation and positioning module 200, along with its own collected vehicle identity information and deduction amount, it synchronously sends this data to the encryption unit. The encryption unit encrypts the data according to a preset encryption algorithm, generating tamper-proof encrypted data. After encryption, the encryption unit sends the encrypted data back to the microcontroller unit, which then completes the data transmission through subsequent components, preventing transaction data from being stolen or tampered with during transmission and ensuring the security of ETC transactions.

[0042] The anti-tamper circuit is connected to the microcontroller unit and is used to detect unauthorized disassembly. The anti-tamper circuit detects unauthorized disassembly by checking the integrity of the vehicle positioning terminal's housing. When the vehicle positioning terminal is in a normal installation state, the anti-tamper circuit continuously sends normal signals to the microcontroller unit. If unauthorized disassembly occurs, such as forcibly prying open the housing or damaging the installation structure, the anti-tamper circuit immediately triggers a state change and sends an abnormal signal to the microcontroller unit. Upon receiving the abnormal signal, the microcontroller unit activates a security protection mechanism, such as locking the electronic toll collection module 300 function, prohibiting subsequent ETC transactions, and triggering alarm-related components, to prevent the vehicle positioning terminal from being maliciously disassembled and having its internal data tampered with or its identity information stolen, thus ensuring the security of the vehicle positioning terminal's hardware and data.

[0043] The radio frequency (RF) unit connects to the microcontroller unit (MCU) and is used to communicate with roadside equipment to achieve electronic transaction data communication. When a vehicle enters the ETC lane, the MCU receives the positioning signal from the navigation and positioning module 200 and sends the pre-processed transaction data to the RF unit. The RF unit converts the data into an RF signal conforming to the roadside equipment's communication protocol and transmits it wirelessly to the roadside equipment. Simultaneously, the RF unit receives transaction response signals from the roadside equipment, such as successful or failed payment instructions, and converts them into electrical signals to be transmitted back to the MCU. The MCU determines the transaction result based on the response signal and then controls other components to perform subsequent operations, such as triggering a buzzer, thus achieving two-way communication of ETC transaction data and ensuring the smooth completion of the transaction process.

[0044] The Bluetooth unit connects to the microcontroller unit and is used for data interaction with external mobile devices. The Bluetooth unit primarily enables short-range data interaction between the electronic toll collection module 300 and external mobile devices. When a user needs to query ETC transaction records, update device parameters, or bind a new ETC card, they can establish a connection with the Bluetooth unit of the vehicle positioning terminal via the Bluetooth function of the external mobile device. After the connection is established, data requests or operation commands sent by the external mobile device are transmitted to the microcontroller unit via the Bluetooth unit. The microcontroller unit retrieves the corresponding data or performs parameter update operations according to the commands and sends the results back to the external mobile device via the Bluetooth unit. This eliminates the need for remote operation by the user through a backend platform, improving the convenience of data interaction.

[0045] The buzzer connects to the microcontroller unit (MCU) and provides audible alerts under the MCU's control. The buzzer is an audible alert component used to provide feedback to the user on key operations or transaction statuses. When the MCU determines that a specific scenario triggers an alert, it sends a control signal to the buzzer. For example, when an ETC transaction is successful, the MCU sends a short beep once, and the buzzer alerts the user with a short sound to indicate the transaction is complete; if the transaction fails, it sends three consecutive short beeps to remind the user to troubleshoot the problem; if the anti-tamper circuit detects unauthorized disassembly, the MCU will also trigger the buzzer to emit a long beep to warn those nearby of the abnormal situation. These different modes of audible alerts help users quickly obtain the operational status of the vehicle positioning terminal.

[0046] In one embodiment of this application, the encryption unit includes at least three independent encryption channels, which are respectively used for encrypting electronic transaction data, device identity information, and satellite positioning data. This embodiment's design of three independent encryption channels is better suited to the differentiated security needs of various data types under the integrated functionality of vehicle-mounted positioning terminals. Each channel operates independently, and keys are managed independently. Even if the encryption logic or key of one channel is compromised, it will not affect the data security of other channels, avoiding the cascading risk of a single channel failure leading to the leakage of all types of data. For different data sensitivity levels and transmission scenarios, appropriate encryption strengths and algorithms can be flexibly configured within each channel. For example, the electronic transaction data channel uses a stronger dynamic key encryption, while the positioning data channel uses an encryption algorithm that balances security and transmission efficiency. This satisfies the security requirements of different data types while avoiding the waste of module computing power and data processing delays caused by excessive encryption. In addition, since the three types of data are encrypted through independent channels and the encrypted data are all aggregated and associated in the microcontroller unit, the back-end management platform can verify the integrity of the data through the decryption keys corresponding to each channel. This ensures the authenticity of the association between the encrypted transaction data, the encrypted positioning data, and the encrypted device identity information, providing a secure and reliable data foundation for refined vehicle management, such as trajectory and transaction matching verification and abnormal transaction location tracing.

[0047] In one embodiment of this application, the anti-tamper circuit is connected to the wake-up pin of the microcontroller unit. When illegal disassembly is detected, the wake-up pin is triggered, causing the microcontroller unit and the main control module 100 to enter a safety protection mode. The anti-tamper circuit, as a detection component, identifies illegal disassembly by monitoring the installation status of the vehicle positioning terminal housing and its internal hardware connections, such as the switch signal triggered by the housing latch and changes in the level of the hardware pin connections. When the vehicle positioning terminal is normally installed and used, the anti-tamper circuit is in a stable state, continuously outputting a low level to the wake-up pin of the microcontroller unit. At this time, the wake-up pin is not triggered, and the microcontroller unit and the main control module 100 maintain their normal operating mode. When illegal disassembly occurs, such as forcibly prying open the vehicle positioning terminal housing, damaging the connection structure between the anti-tamper circuit and the housing, or disconnecting the hardware link of the anti-tamper circuit, the stable state of the anti-tamper circuit is broken, and the output signal immediately switches to a high level, directly acting on the wake-up pin of the microcontroller unit. The wake-up pin, as the hardware-level trigger terminal of the microcontroller unit, can instantly respond to signal changes, start the safety protection program of the microcontroller unit, and simultaneously trigger the main control module 100 to enter the safety protection mode through the communication link between the microcontroller unit and the main control module 100.

[0048] After the anti-tamper circuit triggers the wake-up pin, the microcontroller unit and the main control module 100 enter the safety protection mode. Essentially, this mode prevents data leakage and function abuse risks that may occur after the vehicle positioning terminal is illegally disassembled through function restrictions, data protection, and status locking.

[0049] Once the microcontroller unit enters protection mode, it will immediately suspend the ETC transaction function, such as prohibiting communication between the radio frequency unit and the roadside equipment, and locking data reading and writing to prevent unauthorized dismantlers from stealing ETC accounts and forging transactions by tampering with the microcontroller unit parameters. At the same time, it will encrypt and lock the stored electronic transaction records and sensitive user information, retaining only the secure data format that can be decrypted by the back-end management platform to prevent the data from being illegally extracted.

[0050] After the main control module 100 responds to the trigger signal, it will cut off unnecessary data interaction with the navigation and positioning module 200 and the electronic toll collection module 300, and only maintain the safety status reporting function. It will send illegal disassembly alarm information to the background management platform in real time through the antenna interface, including the vehicle positioning terminal device identification, the time of disassembly and the last location, so as to provide the operator with a basis for tracking the status of the vehicle positioning terminal. At the same time, the control power management module 400 restricts the power supply of non-core modules to prevent illegal disassembly personnel from using the vehicle positioning terminal hardware to perform other illegal operations, so as to fully ensure the safety and controllability of the vehicle positioning terminal in abnormal state.

[0051] In one embodiment of this application, the main control module 100 is further provided with an integrated bus interface, which is used to connect to the vehicle-mounted sensor 600 to collect vehicle motion status data. The integrated bus interface can directly interface with various original or aftermarket motion status sensors of the vehicle, such as acceleration sensors, angular velocity sensors, vehicle speed sensors, and braking status sensors. Through standardized bus protocols, such as CAN bus, LIN bus, and other common vehicle-mounted bus protocols, it can collect key motion data during vehicle operation in real time. After these data are transmitted to the main control module 100 through the integrated bus interface, they can form a multi-dimensional data set with the satellite positioning data of the navigation and positioning module 200 and the transaction data of the electronic toll collection module 300.

[0052] The main control module 100 can fuse motion status data collected by the integrated bus interface with satellite positioning data from the navigation and positioning module 200. For example, when a vehicle travels to areas with weak satellite signals, such as tunnels or under overpasses, satellite positioning data is prone to deviation. In this case, acceleration and angular velocity data can be used to calculate the vehicle's short-term trajectory and correct the positioning deviation. At the same time, combined with vehicle speed data, the accuracy of the driving speed output by the positioning module can be verified, ensuring the authenticity and continuity of the positioning information. When the electronic toll collection module 300 completes an ETC transaction, the main control module 100 can synchronously associate the vehicle status data collected by the integrated bus interface with the transaction data. The main control module 100 can trigger a secondary verification of the electronic toll collection module 300 or report abnormal transaction scenarios to the back-end management platform, assisting the operator in determining whether the transaction is a compliant transaction under normal driving operation, and avoiding transaction disputes or security risks caused by abnormal vehicle status.

[0053] The main control module 100 can analyze the motion status data collected by the integrated bus interface, generate a vehicle driving behavior characteristic report, and upload it to the back-end management platform via the communication antenna. For commercial vehicles such as freight, taxis, and ride-hailing vehicles, this data can serve as an important basis for driver assessment and vehicle dispatching; for private cars, it can assist users in optimizing their driving habits, while providing driving behavior data support for insurance institutions, expanding the application scenarios and practical value of vehicle positioning terminals.

[0054] In one embodiment of this application, the vehicle-mounted positioning terminal further includes a backup battery 500. The backup battery 500 is connected to the power switch pin of the main control module 100, and the other end of the backup battery 500 is connected to the power management module 400. The backup battery 500 serves as a secondary energy reserve for the vehicle-mounted positioning terminal, providing continuous power to key modules of the terminal when the main vehicle power supply is abnormally disconnected, thus preventing functional interruption. Simultaneously, when the main vehicle power supply is normal, the backup battery 500, through its connection to the power management module 400, can receive charging control from the power management module 400 to maintain a fully charged state.

[0055] In one embodiment of this application, the power management module 400 includes a filtering circuit for filtering high-frequency interference signals in the power supply. In the vehicle environment, the power system is susceptible to high-frequency interference signals due to various factors, such as instantaneous voltage fluctuations during vehicle engine startup, electromagnetic radiation coupling from other vehicle electronic devices, and high-frequency noise during power line transmission. If these high-frequency interference signals are input to the various modules of the vehicle positioning terminal along with the power supply, they may cause abnormal module operation. The filtering circuit specifically filters high-frequency interference signals in the power supply. On one hand, it preprocesses the power supply signals from the vehicle's main power supply and backup battery 500 input to the power management module 400, intercepting high-frequency interference in the 100kHz-10MHz frequency range; on the other hand, it filters the output power supply after voltage regulation and distribution by the power management module 400 again, ensuring that the power supply signals delivered to the main control module 100, navigation and positioning module 200, and electronic toll collection module 300 are pure and stable.

[0056] In addition, the filtering circuit can also prevent interference signals from affecting the satellite signal receiving circuit of the navigation and positioning module 200, prevent positioning data from jumping or deviating, and ensure the stability of the positioning function; at the same time, it provides stable power supply to the radio frequency unit and encryption unit of the electronic toll collection module 300, avoiding the interruption of radio frequency communication and abnormal execution of encryption algorithms during the transaction process due to power interference, and reducing the failure rate of ETC transactions.

[0057] In one embodiment of this application, at least one of the main control module 100 and the navigation and positioning module 200 is externally shielded. The vehicle environment contains numerous sources of electromagnetic interference, such as electromagnetic radiation generated by the vehicle engine, electromagnetic coupling from in-vehicle air conditioning or audio equipment, and signal interference from other vehicle electronic devices. These interferences can easily affect the core module of the vehicle positioning terminal in two ways: first, they interfere with the normal operation of the module's internal circuitry; second, the electromagnetic signals generated by the module itself during operation radiate outwards, potentially interfering with other modules.

[0058] Furthermore, the shielding cover is typically made of highly conductive metals such as copper alloys and aluminum alloys. Some shielding covers are also coated with ferrite absorbing material on their inner walls. This allows them to both reflect external electromagnetic interference signals through the metal casing and absorb residual interference that penetrates the casing, creating a dual shielding effect of reflection and absorption. The shielding cover can also adopt a fully enclosed or semi-enclosed structure to form a good grounding connection with the substrate of the main control module 100 or the navigation and positioning module 200, ensuring that interference signals can be guided to the grounding terminal through the shielding cover and avoiding the formation of interfering electric or magnetic fields around the module.

[0059] In one embodiment of this application, common-mode inductors are provided at both the antenna interface and the first transceiver interface. The common-mode inductors, through their anti-interference characteristics, reduce common-mode interference problems that the antenna interface and the first transceiver interface may encounter during signal transmission. When transmitting communication signals, the antenna interface is susceptible to common-mode interference generated by equipment such as engines and air conditioners in the vehicle environment, leading to communication signal errors. Similarly, when transmitting positioning data from the navigation and positioning module 200, the first transceiver interface may also experience common-mode interference due to electromagnetic coupling between modules, affecting the accuracy of the positioning data. The common-mode inductor, with its high impedance to common-mode current and low impedance to differential-mode current, can effectively suppress common-mode interference signals at the interface, ensuring stable transmission of communication signals and accurate interaction of positioning data, avoiding communication interruptions and positioning deviations caused by signal interference.

[0060] In one embodiment of this application, the power management module 400 further includes a current and voltage sampling unit and a power supply regulation unit. The current and voltage sampling unit is connected to the sampling pin of the main control module 100 to collect the operating current and power supply voltage data of the main control module 100 and the navigation and positioning module 200. The power supply regulation unit is signal-connected to the current and voltage sampling unit and electrically connected to the power supply pin of the main control module 100 and the power control terminal of the navigation and positioning module 200. When the current and voltage sampling unit detects that the operating current of the main control module 100 is lower than a set load threshold, the power supply regulation unit lowers the power supply voltage of the main control module 100. When the vehicle is detected to be stationary and there is no positioning requirement, the power supply regulation unit cuts off the power supply to the power control terminal of the navigation and positioning module 200. When a positioning requirement is detected, the power supply regulation unit wakes up the power supply to the power control terminal. As a power supply status monitoring terminal, the current and voltage sampling unit can collect the operating current and power supply voltage data of the main control module 100 and the navigation and positioning module 200 in real time by connecting to the sampling pin of the main control module 100. It can capture the current changes of the main control module 100 in different working modes, and also monitor the voltage stability of the navigation and positioning module 200 in positioning and sleep states.

[0061] The power supply regulation unit acts as the power supply control execution end. On one hand, it establishes a signal connection with the current and voltage sampling unit to receive sampling data in real time. On the other hand, it is connected to the power supply pins of the main control module 100 and the power control terminal of the navigation and positioning module 200 through hardware connections, enabling it to adjust power supply parameters and control power on / off. For the main control module 100, when the sampling unit detects that its operating current is lower than the set load threshold, the power supply regulation unit will actively adjust the power supply voltage of the main control module 100 from the normal value to a voltage suitable for low load, reducing power consumption without affecting the core functions. For the navigation and positioning module 200, when it is determined from relevant signals that positioning is not required, the power supply regulation unit will cut off the power supply to its power control terminal to put the module into complete sleep mode to avoid unnecessary power consumption. When a positioning requirement is detected, it can quickly wake up the power supply to ensure timely response of the positioning function.

[0062] By working together with the current and voltage sampling unit and the power supply regulation unit, the problem of fixed power supply and high power consumption in traditional power management is solved. Through dynamic regulation, the overall power consumption of the vehicle positioning terminal is reduced and the backup battery life is extended by 500 kilowatts. At the same time, the power supply resources can be matched according to the actual working status of the module to avoid module failure due to improper power supply, thus providing energy-level guarantee for the stable operation of the vehicle positioning terminal.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A vehicle-mounted positioning terminal, characterized in that, The vehicle-mounted positioning terminal includes: The main control module is equipped with an antenna interface for connecting a communication antenna. The navigation and positioning module, the main control module is further provided with a first transceiver interface, the navigation and positioning module is connected to the first transceiver interface, and the navigation and positioning module is used to connect to navigation satellites for satellite positioning; The electronic toll collection module, the main control module is further provided with a second transceiver interface, the electronic toll collection module is connected to the second transceiver interface, the first transceiver interface and the second transceiver interface are located on the same side of the main control module, and the antenna interface and the first transceiver interface are located on opposite sides of the main control module; The main control module is also provided with a power management module, which is connected to the power management module and is used to supply power to each module.

2. The vehicle-mounted positioning terminal according to claim 1, characterized in that, The electronic toll collection module includes: Microcontroller unit; An encryption unit, connected to the microcontroller unit, is used to encrypt data; Anti-tamper circuit, which is connected to the microcontroller unit, is used to detect unauthorized disassembly; The radio frequency unit is connected to the microcontroller unit and is used to communicate with roadside equipment to realize electronic transaction data communication. A Bluetooth unit, which is connected to the microcontroller unit, is used for data interaction with external mobile devices; A buzzer, connected to the microcontroller unit, is used to provide audible prompts under the control of the microcontroller unit.

3. The vehicle-mounted positioning terminal according to claim 2, characterized in that, The encryption unit includes at least three independent encryption channels, which are used to encrypt electronic transaction data, device identity information, and satellite positioning data, respectively.

4. The vehicle-mounted positioning terminal according to claim 2, characterized in that, The anti-tamper circuit is connected to the wake-up pin of the microcontroller unit. When illegal disassembly is detected, the wake-up pin is triggered, causing the microcontroller unit and the main control module to enter a safety protection mode.

5. The vehicle-mounted positioning terminal according to claim 1, characterized in that, The main control module is also equipped with an integrated bus interface, which is used to connect on-board sensors to collect vehicle motion status data.

6. The vehicle-mounted positioning terminal according to claim 1, characterized in that, The vehicle-mounted positioning terminal also includes a backup battery, which is connected to the power switch pin of the main control module, and the other end of the backup battery is connected to the power management module.

7. The vehicle-mounted positioning terminal according to claim 1, characterized in that, The power management module includes a filtering circuit, which is used to filter high-frequency interference signals in the power supply.

8. The vehicle-mounted positioning terminal according to claim 1, characterized in that, At least one of the main control module and the navigation and positioning module is provided with a shield.

9. The vehicle-mounted positioning terminal according to claim 1, characterized in that, Common-mode inductors are provided at the locations of both the antenna interface and the first transceiver interface.

10. The vehicle-mounted positioning terminal according to claim 1, characterized in that, The power management module also includes a current and voltage sampling unit and a power supply regulation unit; The current and voltage sampling unit is connected to the sampling pin of the main control module to collect the operating current and power supply voltage data of the main control module and the navigation and positioning module; The power supply regulation unit is signal-connected to the current and voltage sampling unit, and is also electrically connected to the power supply pin of the main control module and the power control terminal of the navigation and positioning module. When the current and voltage sampling unit detects that the operating current of the main control module is lower than the set load threshold, the power supply adjustment unit lowers the power supply voltage of the main control module. When the vehicle is detected to be stationary and there is no need for positioning, the power supply adjustment unit cuts off the power supply to the power control terminal of the navigation and positioning module. When a positioning need is detected, the power supply adjustment unit wakes up the power supply to the power control terminal.

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