Vehicle positioning device based on Beidou satellite navigation system and GPS

Abstract

The invention discloses a vehicle positioning device based on a Beidou satellite navigation system and a GPS. The device comprises a 5G board card, a CPU board card and a combined antenna. The 5G board card comprises a Beidou satellite navigation and GPS module and a 5G communication module; the Beidou satellite navigation and GPS module is used for acquiring positioning information and time service information of a vehicle; the CPU board card is used for acquiring vehicle information and receiving the positioning information and the time service information; the vehicle information, the positioning information and the time service information are sent to the 5G communication module; the 5G communication module is used for receiving the vehicle information, the positioning information and the time service information and sending the information to a ground monitoring system through a combined antenna; according to the invention, high-precision acquisition of positioning information and time service information of the vehicle and high-speed reliable transmission of vehicle-mounted operation data can be realized, and the continuity of vehicle positioning, the real-time performance of data uploading and the overall reliability of a vehicle-mounted monitoring system in a complex environment are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of communication technology, in particular to a vehicle positioning device based on Beidou satellite navigation system and GPS. BACKGROUND

[0002] As an important part of the railway mobile equipment operation safety guarantee system, the Train Control and Diagnosis System (TCDS) undertakes the functions of passenger train operation state monitoring, fault information collection and operation safety diagnosis, and plays a key role in improving the safety and reliability of railway transportation. The existing TCDS system is mainly composed of a TCDS host, a GPS antenna, a GPRS antenna, a WLAN antenna and corresponding feed lines. The CPU board of the TCDS host is used to collect various operation information such as vehicle positioning, braking state, anti-skid state, bogie state, axle temperature and smoke monitoring, and transmit the monitoring data and alarm information to the GPRS board card in a serial communication mode. The GPRS board card integrates a GPS module and a GPRS module, wherein the GPS module is used to provide positioning and timing information of the train, and the GPRS module uses the 2G communication network to transmit the monitoring data to the road bureau 5T server in real time, and provides real-time display and processing for the ground monitoring system.

[0003] To ensure the reception quality of the navigation signal, the GPS antenna is arranged outside the vehicle body and connected with the GPS module in the GPRS board card, for receiving and amplifying the navigation satellite signal. The GPRS antenna and the WLAN antenna are respectively used for remote real-time data transmission and process data download. The above-mentioned GPS antenna, GPRS antenna and WLAN antenna usually need to be installed separately to meet the different signal type and communication function requirements.

[0004] However, the existing TCDS system still has obvious deficiencies in positioning and timing functions. Since the TCDS system relies on GPS for train positioning, the GPS signal is easily affected by building shielding, terrain undulation and adverse weather conditions, especially in tunnels, mountainous areas or urban high-density building areas, often resulting in signal attenuation, positioning interruption or significant decrease in positioning accuracy, making it difficult to ensure the continuity and stability of the positioning service.

[0005] On the other hand, the existing TCDS system uploads the positioning information and state data to the ground monitoring platform through the 2G communication network. With the gradual closure of the 2G network by communication operators and the stop of related infrastructure investment, the 2G communication mode based on the GPRS board card has been difficult to meet the requirements of high reliability and real-time of railway operation, often leading to problems such as data transmission delay, packet loss or upload failure, thereby affecting the real-time grasp of the train state by the ground monitoring system and limiting the function of the TCDS system.

[0006] This section is intended to provide background or context for the embodiments of the invention set forth in the claims. The description herein is not an admission that it is prior art simply because it is included in this section. Summary of the Invention

[0007] This invention provides a vehicle positioning device based on the BeiDou Navigation Satellite System and GPS, which enables high-precision acquisition of vehicle positioning and timing information and high-speed and reliable transmission of vehicle operation data, thereby improving the continuity of vehicle positioning, the real-time performance of data upload, and the overall reliability of the vehicle monitoring system in complex environments.

[0008] The vehicle positioning device based on the BeiDou satellite navigation system and GPS includes: a 5G board, a CPU board, and a combined antenna;

[0009] The 5G board includes a BeiDou satellite navigation and GPS module and a 5G communication module;

[0010] The Beidou satellite navigation and GPS module is used to obtain the vehicle's positioning information and timing information;

[0011] The CPU board is used to acquire vehicle information and receive the location information and the timing information; and to send the vehicle information, the location information and the timing information to the 5G communication module.

[0012] The 5G communication module is used to receive the vehicle information, the location information, and the timing information, and then transmit them to the ground monitoring system via a combined antenna.

[0013] In some embodiments, the combined antenna is used to receive first electromagnetic wave signals from the BeiDou Navigation Satellite System and the Global Positioning System, convert the first electromagnetic wave signals into electrical signals, and transmit the electrical signals to the BeiDou Navigation Satellite System and GPS module; convert the positioning information, timing information, and vehicle information sent by the 5G communication module into second electromagnetic wave signals, and transmit the second electromagnetic wave signals to the ground monitoring system; wherein, the electrical signals include positioning information and timing information.

[0014] In some embodiments, the 5G board and the CPU board are disposed on the TCDS host backplane inside the vehicle.

[0015] In some embodiments, the 5G board and the CPU board communicate via a serial port and an Ethernet port on the TCDS host backplane.

[0016] In some embodiments, the combined antenna includes a BeiDou satellite antenna, a global positioning antenna, and a 5G antenna; the combined antenna is disposed on the top of the vehicle.

[0017] In some embodiments, the combined antenna further includes: a first feed line, a second feed line, a first feed line interface, and a second feed line interface; the BeiDou satellite antenna and the global positioning antenna are connected to the first feed line interface via the first feed line; the 5G antenna is connected to the second feed line interface via the second feed line.

[0018] In some embodiments, when the 5G board does not receive a network signal, the CPU board is also used to cache the unsent vehicle information, the location information, and the timing information.

[0019] In some embodiments, the CPU board includes: a first main panel and a first front panel; the first front panel is provided with a power status indicator, a USB interface, a YL interface, a debug interface and a display interface; the first main panel includes: an ARM processor, a system disk, a data disk, a real-time clock and an external watchdog timer.

[0020] In some embodiments, the rated input voltage of the CPU board is 5V DC voltage, and the rated input power of the CPU board is less than or equal to 10W.

[0021] In some embodiments, the 5G board includes: a second main panel and a second front panel;

[0022] The second front panel is provided with multiple indicator lights, multiple 5G radio frequency antenna interfaces and a BDS interface; the BDS interface is used to connect to the first feeder interface to receive the positioning information and timing information acquired by the combined antenna; the 5G radio frequency antenna interface is used to connect to the second feeder interface to send the vehicle information, the positioning information and the timing information to the combined antenna.

[0023] The BeiDou satellite navigation and GPS module and the 5G communication module are located inside the second main panel.

[0024] The vehicle positioning device based on the BeiDou Navigation Satellite System and GPS provided in this invention effectively improves the stability and integrity of vehicle positioning and timing information acquisition through the integrated application of the BeiDou Navigation Satellite System and the Global Positioning System. This avoids the signal attenuation and positioning interruption problems that easily occur with a single Global Positioning System in complex environments such as tunnels, mountainous areas, or densely populated urban areas. The vehicle positioning device works in conjunction with a 5G communication module using a combined antenna. When the vehicle crosses different operating sections, it can automatically search for the optimal base station, achieving continuous maintenance of the cross-regional communication link. When the train is running at high speed and the wireless signal changes rapidly, traditional communication modules may experience lag and affect base station switching. However, the vehicle positioning device of this invention can detect the signal status of the next base station in advance when the train approaches the base station boundary area, achieving millisecond-level rapid switching and ensuring uninterrupted wireless link operation. Through the above technical solutions, the vehicle positioning device of this invention significantly improves the accuracy of positioning and timing, the stability of the wireless communication link, and the overall operational reliability of the system. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings:

[0026] Figure 1 This is a schematic diagram of the vehicle positioning device based on the BeiDou satellite navigation system and GPS in an embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of the front panel of the CPU board in an embodiment of the present invention;

[0028] Figure 3 This is a schematic diagram of the main panel of the CPU board in an embodiment of the present invention;

[0029] Figure 4 This is a schematic diagram of the CPU board structure in an embodiment of the present invention;

[0030] Figure 5 This is a schematic diagram of the front panel of the 5G board in an embodiment of the present invention;

[0031] Figure 6 This is a schematic diagram of the main panel of the 5G board in an embodiment of the present invention;

[0032] Figure 7 This is a schematic diagram of the structure of the 5G board in an embodiment of the present invention;

[0033] Figure 8 This is a side view of the combined antenna in an embodiment of the present invention;

[0034] Figure 9 This is a front view of the combined antenna in an embodiment of the present invention;

[0035] Figure 10 This is a top view of the combined antenna in an embodiment of the present invention. Detailed Implementation

[0036] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0037] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0038] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0039] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0040] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0041] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0042] Existing railway vehicle positioning devices generally rely on a single Global Positioning System (GPS) and 2G communication technology, resulting in insufficient vehicle positioning accuracy and timing stability. Furthermore, signal attenuation or interruption is prone to occur in tunnels, mountainous areas, and densely built-up urban environments. In addition, the antenna distribution and board interfaces of existing railway vehicle positioning devices are scattered, resulting in low overall integration. The real-time performance and reliability of vehicle operation data uploads are insufficient to meet the requirements of railway transportation safety monitoring. To address these issues, this application provides a vehicle positioning device based on the BeiDou Navigation Satellite System and GPS. This vehicle positioning device integrates a 5G board, a CPU board, and a combined antenna—including a BeiDou Navigation Satellite System and GPS module and a 5G communication module—on the backplane of the Train Control and Diagnosis System (TCDS). The BeiDou Navigation Satellite System and GPS module acquire vehicle positioning and timing information, which is then uploaded to the ground monitoring system via the 5G communication module in a transparent transmission manner. When the 5G communication network is unavailable, the CPU board caches the unuploaded positioning, timing, and vehicle information. Through the above structural design, high-precision acquisition and high-speed reliable uploading of vehicle positioning and timing information are achieved, improving the real-time performance and system integration of railway vehicle operation status monitoring.

[0043] like Figure 1 As shown, the present invention provides a vehicle positioning device based on the BeiDou satellite navigation system and GPS, including: a 5G board, a CPU board and a combined antenna.

[0044] The 5G board includes a BeiDou satellite navigation and GPS module and a 5G communication module.

[0045] The BeiDou satellite navigation and GPS module is used to obtain the vehicle's positioning and timing information.

[0046] The CPU board is used to acquire vehicle information and receive location and timing information. It then sends the vehicle information, location information, and timing information to the 5G communication module.

[0047] The 5G communication module is used to transmit the received vehicle information, location information, and timing information to the ground monitoring system via a combined antenna.

[0048] According to the above embodiments, the integrated application of the BeiDou Navigation Satellite System and the Global Positioning System effectively improves the stability and integrity of vehicle positioning and timing information acquisition, avoiding the signal attenuation and positioning interruption problems that easily occur with a single Global Positioning System in complex environments such as tunnels, mountainous areas, or densely populated urban areas. This vehicle positioning device works in conjunction with a combined antenna and a 5G communication module, automatically searching for the optimal base station when the vehicle crosses different operating sections, achieving continuous maintenance of cross-regional communication links. When the train is running at high speed, causing rapid changes in wireless signals, traditional communication modules may experience lag and affect base station switching. However, the vehicle positioning device of this invention can detect the signal status of the next base station in advance when the train approaches the base station boundary area, achieving millisecond-level rapid switching and ensuring uninterrupted wireless links. Through the above technical solutions, the vehicle positioning device of this invention significantly improves the accuracy of positioning and timing, the stability of wireless communication links, and the overall operational reliability of the system.

[0049] In this embodiment of the invention, the 5G board includes a BeiDou Navigation Satellite System (BDS) and a GPS module, and a 5G communication module. The combined antenna receives electromagnetic wave signals broadcast by satellites of the BeiDou Navigation Satellite System (BDS) and the Global Positioning System (GPS), converts these signals into radio frequency (RF) signals, and transmits them to the BDS and GPS module. The BDS and GPS module performs digital signal processing on the RF signals to obtain the vehicle's positioning information and timing information. The BDS and GPS module then transmits this positioning information and timing information to the CPU board.

[0050] The positioning information includes the vehicle's geographical coordinates, signal status information from BeiDou and GPS satellites, and geographical coordinates including longitude, latitude, and altitude. The timing information includes a standard timestamp, UTC time broadcast by the satellite, timing status flags, and time calibration flags. The timing status flags indicate the validity of the timing information, including valid and invalid states.

[0051] The vehicle information obtained by the CPU board includes: Brake Status, Anti-skid Status, Pipe Pressure, Axle Temperature, and Smoke and Fire Alarm Information.

[0052] The CPU board is also used to encapsulate vehicle information, location information, and timing information into data frames and send these data frames to the 5G communication module. After the 5G communication module performs wireless communication baseband processing on the data frames, it sends electromagnetic wave signals to the 5G ground base station through the 5G radio frequency antenna interface of the combined antenna, so that the ground monitoring system can receive the vehicle information, location information, and timing information.

[0053] In some embodiments, such as Figure 1 As shown, the vehicle positioning device based on the BeiDou satellite navigation system and GPS also includes a pipe pressure board. Pipe pressure information is collected by the pipe pressure board, and this information includes pressure data from the vehicle's main air duct and the train's air duct.

[0054] The front panel of the pipe pressure board is equipped with multiple indicator lights and a pipe pressure signal interface. The indicator lights include: a power status indicator, a running status indicator, a train pipe (LCG) indicator, and a main duct (ZCG) indicator. The power status indicator indicates the power supply status of the pipe pressure board; the running status indicator indicates the operating status of the pipe pressure board; the LCG indicator indicates the acquisition status of the train pipe pressure (Line / Train Pipe Air Pressure); and the ZCG indicator indicates the acquisition status of the main duct pressure (Main Reservoir Air Pressure). The pipe pressure signal interface is used to connect to the vehicle's main duct pressure sensor and train pipe pressure sensor to acquire pipe pressure information.

[0055] The duct pressure card is connected to the TCDS host backplane via a plug-in installation method, so that the total duct pressure data and train duct pressure data collected by the duct pressure card can be transmitted to the CPU board for processing through the backplane channel of the TCDS host.

[0056] In some embodiments, such as Figure 1As shown, the vehicle positioning device based on the BeiDou satellite navigation system and GPS also includes an axle temperature board. Axle temperature information is collected by the axle temperature board. The front panel of this axle temperature board has multiple indicator lights and an axle temperature signal interface. The indicator lights include: a power status indicator, a receive status indicator, a transmit status indicator, and an operating status indicator. The power status indicator indicates the power supply status of the axle temperature board; the receive status indicator indicates whether the axle temperature board has received temperature data from the axle box sent by the temperature sensor; the transmit status indicator indicates whether the axle temperature board has transmitted the collected axle box temperature data to the TCDS host; and the operating status indicator indicates the working status of the axle temperature board. The axle temperature signal interface is located on the upper part of the front panel and is used to receive temperature data sent by the axle temperature alarm.

[0057] The axle temperature board is connected to the TCDS host backplane via a plug-in installation method, so that the temperature data of the wheel axle box collected by the axle temperature board can be transmitted to the CPU board for processing through the backplane channel of the TCDS host.

[0058] In some embodiments, such as Figure 1 As shown, the vehicle positioning device based on the BeiDou satellite navigation system and GPS also includes an auxiliary power supply board. The front panel of the auxiliary power supply board has multiple indicator lights and multiple communication interfaces. The indicator lights include: a 5V indicator light, a COM1 indicator light, a COM8 indicator light, and a CAN indicator light. The 5V indicator light indicates whether the 5V auxiliary power output of the auxiliary power supply board is normal; the COM1 indicator light indicates the working status of the COM1 channel of the auxiliary power supply board; the COM8 indicator light indicates the working status of the COM8 channel of the auxiliary power supply board; and the CAN indicator light indicates the CAN bus communication status of the auxiliary power supply board. The communication interfaces include: a COM1 interface and a COM8 / CAN interface. The auxiliary power supply board is connected to the TCDS host backplane via a plug-in installation method.

[0059] In some embodiments, such as Figure 1 As shown, the vehicle positioning device based on the BeiDou satellite navigation system and GPS also includes a main power supply board. The front panel of the main power supply board features a 12V output status indicator, a 2A current interface, a power switch, and a 110V DC power interface. The 12V output status indicator shows the main power supply board's conversion of the input 110V DC power to a 12V DC output. The 110V DC power interface is used to connect an external 110V DC power supply to provide input power to the TCDS host. The main power supply board is connected to the TCDS host backplane via a plug-in installation method.

[0060] In some embodiments, such as Figure 1As shown, the vehicle positioning device based on the BeiDou satellite navigation system and GPS also includes a WLAN board. The front panel of the WLAN board has multiple indicator lights and a WLAN interface. The indicator lights include: a CPU status indicator, a wireless status indicator, and a power status indicator. The CPU status indicator indicates the communication status between the WLAN board and the CPU board; the wireless status indicator indicates whether the wireless link of the WLAN board is in a valid connection state; and the power status indicator indicates the power supply status of the WLAN board. The WLAN board is connected to the TCDS host backplane via a plug-in installation method.

[0061] In some embodiments, such as Figure 1 As shown, the vehicle positioning device based on the BeiDou satellite navigation system and GPS also includes a serial port isolation board. The front panel of the serial port isolation board has a vehicle power status indicator light and a vehicle power interface. The vehicle power status indicator light indicates whether vehicle power information such as air conditioning status has been received, and the vehicle power interface is used to receive vehicle power data. The serial port isolation board is connected to the TCDS host backplane via a plug-in installation method.

[0062] In some embodiments, the present invention preferentially uses the BeiDou Navigation Satellite System to obtain vehicle positioning and timing information. If the BeiDou Navigation Satellite System fails to obtain valid positioning and timing information for two consecutive minutes, the BeiDou Navigation and GPS module automatically switches to the Global Positioning System (GPS) for positioning and timing. If the Global Positioning System also fails to obtain valid data for two consecutive minutes, the BeiDou Navigation and GPS module switches back to the BeiDou Navigation Satellite System to ensure the continuous availability of vehicle positioning and timing information and the stability of system operation.

[0063] The BeiDou Navigation Satellite System used in this invention is the BeiDou-3 Global Navigation Satellite System. Compared to the Global Positioning System (GPS), the BeiDou-3 Global Navigation Satellite System has higher positioning accuracy, enabling ground monitoring systems to more accurately acquire the real-time operating status of trains and generate detailed driving trajectory data. Furthermore, the BeiDou-3 Global Navigation Satellite System employs a tri-frequency signal system, which, compared to GPS's dual-frequency signal, has a stronger ability to eliminate ionospheric delay errors. This significantly improves the anti-interference performance and stability of satellite signals, facilitating the continuous and reliable acquisition of positioning and timing information in complex electromagnetic environments and high-speed operating scenarios.

[0064] In some embodiments, the combined antenna is used to receive first electromagnetic wave signals from the BeiDou Navigation Satellite System and the Global Positioning System, convert the first electromagnetic wave signals into electrical signals, and transmit the electrical signals to the BeiDou Navigation Satellite System and GPS module; it also converts the positioning information, timing information, and vehicle information sent by the 5G communication module into second electromagnetic wave signals and transmits the second electromagnetic wave signals to the ground monitoring system. The electrical signals include positioning information and timing information.

[0065] In this embodiment of the invention, the combined antenna is used to receive electromagnetic wave signals broadcast by satellites of BDS and GPS. These electromagnetic wave signals are then converted into radio frequency electrical signals and transmitted to the BeiDou satellite navigation and GPS module. The combined antenna is also used to convert the electrical signals of vehicle information, positioning information, and timing information output by the 5G communication module into electromagnetic wave signals, which are then transmitted to the ground monitoring system.

[0066] In some embodiments, the 5G board and CPU board are mounted on the TCDS host backplane inside the vehicle.

[0067] In this embodiment of the invention, the aforementioned 5G board, CPU board, pipe pressure board, shaft temperature board, auxiliary power supply board, main power supply board, WLAN board, and serial port isolation board all adopt a pluggable installation structure to connect to the TCDS host backplane. Figure 1 As shown, after the above-mentioned boards are inserted into the TCDS host backplane, each board is fixed to the TCDS host frame with multiple screws to ensure the stability of the connection between each board and the TCDS host backplane.

[0068] The TCDS main unit has multiple mounting holes around its casing, which can be used to fix the TCDS main unit to the wall of the vehicle equipment room or cabinet using screws or bolts, thereby ensuring the reliable installation and stable operation of the vehicle positioning device of the present invention.

[0069] In some embodiments, such as Figures 2 to 4 As shown, the CPU board includes a first main panel and a first front panel. The first front panel is equipped with a power status indicator, a USB interface, a YL interface, a debug interface, and a display interface. The first main panel includes an ARM processor, a system disk, a data disk, a real-time clock, and an external watchdog timer.

[0070] In this embodiment of the invention, the CPU board adopts a 3U-12HP standard board. The front panel of the CPU board is equipped with a power status indicator and multiple communication interfaces. The power status indicator is used to indicate the power supply status of the CPU board. The communication interfaces include a YL interface, a debugging interface, and a display interface. The YL interface is an RS232 interface used for internal debugging of the CPU board. The debugging interface is an Ethernet interface used to connect an external host computer or debugging equipment to perform debugging operations on the CPU board. The display interface is a VGA interface used to transmit vehicle information output by the CPU board to an in-vehicle display terminal (such as an in-vehicle touchscreen).

[0071] The CPU board's main panel contains a system disk, a data disk, a real-time clock (RTC), and an external watchdog. The system disk stores the CPU board's operating system and related programs. The data disk stores vehicle information, location information, timing information, and log data generated during system operation. The real-time clock provides a stable time base for the CPU board, ensuring the correct execution of time-related tasks. The external watchdog monitors the CPU board's operating status; if it detects a prolonged period of unresponsiveness, it triggers a reset signal to restore normal operation.

[0072] In some embodiments, the rated input voltage of the CPU board is 5V DC voltage, and the rated input power of the CPU board is less than or equal to 10W.

[0073] In some embodiments, the CPU board and the 5G board communicate via a serial port and an Ethernet port on the TCDS host backplane.

[0074] In some embodiments, when the 5G board does not receive a network signal, the CPU board is also used to cache unsent vehicle information, location information, and timing information.

[0075] According to the above embodiments, when the train enters a long tunnel or travels to a section without network signal coverage, the 5G board cannot transmit vehicle information, location information, and timing information to the ground monitoring system in real time. To avoid data loss, the CPU board is used to cache the aforementioned data that could not be transmitted in time. When the 5G board receives a valid network signal again, the CPU board continues to send the cached data to the 5G communication module, which then transmits it to the ground monitoring system via a wireless link, thereby ensuring that the ground monitoring system can obtain complete and continuous vehicle operation status information.

[0076] In some embodiments, such as Figures 5 to 7As shown, the 5G board includes: a second main panel and a second front panel.

[0077] The second front panel features multiple indicator lights, multiple 5G RF antenna interfaces, and a BDS interface. The BDS interface connects to the first feeder interface to receive positioning and timing information acquired by the combined antenna. The 5G RF antenna interfaces connect to the second feeder interface to transmit vehicle information, positioning information, and timing information to the combined antenna.

[0078] The BeiDou satellite navigation and GPS module and the 5G communication module are located inside the second main panel.

[0079] In this embodiment of the invention, the 5G board adopts a 3U plug-in structure, and the front panel width of the 5G board is 6HP. The Ethernet interface of the 5G board is a 100Mbps Ethernet interface, and the power supply uses a DC24V isolated power supply. The total power consumption of the 5G board is less than 10W.

[0080] The main panel of the 5G board integrates a BeiDou satellite navigation and GPS module as well as a 5G communication module. The 5G communication module is used to transmit vehicle information, location information, and timing information sent by the CPU board to the combined antenna through the 5G radio frequency antenna interface in transparent transmission mode.

[0081] like Figure 5 As shown, the 5G RF antenna interface includes: 5G1 interface, 5G2 interface, 5G3 interface and 5G4 interface, which are connected to the four second feed lines of the combined antenna.

[0082] like Figure 5 As shown, the front panel of the 5G board has multiple status indicator lights, including: a power status indicator, a BDS indicator, a 5G indicator, and an Ethernet interface status indicator. The power status indicator shows the power supply status of the 5G board. The BDS indicator shows the operating status of the BeiDou satellite navigation and GPS module inside the 5G board. The 5G indicator shows whether the 5G communication module is operating normally. The Ethernet interface status indicator shows whether the Ethernet communication link between the 5G board and the CPU board is normal.

[0083] According to the above embodiments, the 5G communication module used in this invention has high wireless transmission capabilities, with an uplink real-time rate of 50Mbps to 200Mbps and a downlink real-time rate of 100Mbps to 1Gbps, which can meet the high-speed transmission requirements of train positioning information, timing information, and vehicle information. Based on the low latency and high bandwidth characteristics of the 5G network, this invention can significantly improve the real-time performance and stability of vehicle operation status data uploaded to the ground monitoring system, achieving continuous and complete reporting of vehicle operation status and reducing data loss or delay caused by network fluctuations.

[0084] In some embodiments, when the train fails to obtain valid positioning and timing information for 5 consecutive minutes, the CPU board sends a hardwired control signal to the 5G communication module in the 5G board. Upon receiving the hardwired control signal, the 5G communication module performs a forced reset operation and re-searches the network to select the optimal base station, thereby resolving the problem of base station switching failure caused by 5G communication module malfunction, ensuring the stability of the wireless communication link and the continuous and reliable acquisition of positioning information.

[0085] In some embodiments, the combined antenna includes a BeiDou satellite antenna, a global positioning antenna, and a 5G antenna. The combined antenna is mounted on the roof of the vehicle.

[0086] In this embodiment of the invention, the combined antenna integrates a BeiDou satellite navigation antenna (BDS Antenna) unit, a Global Positioning Antenna (GPS Antenna) unit, and multiple 5G communication antenna units. The BeiDou satellite navigation antenna unit and the GPS antenna unit communicate with the 5G board via a first feeder. The multiple 5G communication antenna units are respectively connected to the 5G board via second feeders.

[0087] In some embodiments, the combined antenna further includes: a first feeder cable, a second feeder cable, a first feeder cable interface, and a second feeder cable interface. The BeiDou satellite antenna and the global positioning antenna are connected to the first feeder cable and the first feeder cable interface. The 5G antenna is connected to the second feeder cable and the second feeder cable interface.

[0088] In embodiments of the present invention, such as Figures 8 to 10 As shown, the combined antenna includes a combined antenna housing, a combined antenna base, and multiple radio frequency antenna units disposed inside the antenna housing.

[0089] Five feed lines extend from the bottom of the combined antenna housing. Among them, the single long feed line located in the middle (the first feed line) is connected to the BDS interface of the 5G board through the first feed line interface. It is used to transmit the radio frequency electrical signals, which are received and converted by the Beidou satellite navigation system and the global positioning system satellite electromagnetic wave signals, to the Beidou satellite navigation and GPS module of the 5G board.

[0090] The remaining four shorter feeders (second feeders) are connected to multiple 5G radio frequency antenna interfaces on the 5G board through the second feeder interface, and are used to transmit vehicle information, positioning information and timing information output by the 5G communication module to the ground monitoring system through 5G Multiple-Input Multiple-Output (MIMO) communication technology.

[0091] According to the above embodiments, by employing multi-antenna MIMO technology, the TCDS host is upgraded from a single-antenna structure to a four-antenna communication architecture, thereby realizing the transmission and reception of multi-channel radio frequency signals. Multi-antenna MIMO technology can significantly improve the transmission reliability of the wireless link, reduce the impact of signal attenuation, and enhance anti-interference capabilities through spatial multiplexing and diversity gain. Because MIMO technology introduces additional spatial degrees of freedom, the estimation accuracy of the communication channel is improved, effectively suppressing random channel fluctuations caused by environmental changes. Through the above technical solution, this invention can maintain the stability of vehicle positioning information and other data transmissions in complex operating environments, significantly reducing the impact of the external environment on wireless communication quality, and improving the communication performance and system reliability of the entire vehicle positioning device.

[0092] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A vehicle positioning device based on the BeiDou satellite navigation system and GPS, characterized in that, Includes: 5G boards, CPU boards, and combined antennas; The 5G board includes a BeiDou satellite navigation and GPS module and a 5G communication module; The Beidou satellite navigation and GPS module is used to obtain the vehicle's positioning information and timing information; The CPU board is used to acquire vehicle information and receive the location information and the timing information; and to send the vehicle information, the location information and the timing information to the 5G communication module. The 5G communication module is used to receive the vehicle information, the location information, and the timing information, and then transmit them to the ground monitoring system via a combined antenna.

2. The apparatus according to claim 1, characterized in that, The combined antenna is used to receive first electromagnetic wave signals from the BeiDou Navigation Satellite System and the Global Positioning System, convert the first electromagnetic wave signals into electrical signals, and transmit the electrical signals to the BeiDou Navigation Satellite System and GPS module; it converts the positioning information, timing information, and vehicle information sent by the 5G communication module into second electromagnetic wave signals, and transmits the second electromagnetic wave signals to the ground monitoring system; wherein, the electrical signals include positioning information and timing information.

3. The apparatus according to claim 1, characterized in that, The 5G board and the CPU board are mounted on the TCDS host backplane inside the vehicle.

4. The apparatus according to claim 1, characterized in that, The 5G board and the CPU board communicate with each other through the serial port and Ethernet port on the TCDS host backplane.

5. The apparatus according to claim 1, characterized in that, The combined antenna includes a BeiDou satellite antenna, a global positioning antenna, and a 5G antenna; the combined antenna is installed on the top of the vehicle.

6. The apparatus according to claim 5, characterized in that, The combined antenna further includes: a first feed line, a second feed line, a first feed line interface, and a second feed line interface; the BeiDou satellite antenna and the global positioning antenna are connected to the first feed line interface via the first feed line; the 5G antenna is connected to the second feed line interface via the second feed line.

7. The apparatus according to claim 1, characterized in that, When the 5G board does not receive a network signal, the CPU board is also used to cache the unsent vehicle information, location information, and timing information.

8. The apparatus according to claim 1, characterized in that, The CPU board includes: a first main panel and a first front panel; the first front panel is provided with a power status indicator, a USB interface, a YL interface, a debug interface and a display interface; the first main panel includes: an ARM processor, a system disk, a data disk, a real-time clock and an external watchdog timer.

9. The apparatus according to claim 1, characterized in that, The rated input voltage of the CPU board is 5V DC voltage, and the rated input power of the CPU board is less than or equal to 10W.

10. The apparatus according to claim 5, characterized in that, The 5G board includes: a second main panel and a second front panel; The second front panel is provided with multiple indicator lights, multiple 5G radio frequency antenna interfaces and a BDS interface; the BDS interface is used to connect to the first feeder interface to receive the positioning information and timing information acquired by the combined antenna; the 5G radio frequency antenna interface is used to connect to the second feeder interface to send the vehicle information, the positioning information and the timing information to the combined antenna. The BeiDou satellite navigation and GPS module and the 5G communication module are located inside the second main panel.

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