CN112688706A

CN112688706A - Vehicle-mounted equipment

Info

Publication number: CN112688706A
Application number: CN202110065176.5A
Authority: CN
Inventors: 王刚
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-01-18
Filing date: 2021-01-18
Publication date: 2021-04-20

Abstract

The embodiment of the application discloses mobile unit, including: the system comprises a GPS antenna, a V2X antenna, OBU vehicle-mounted equipment, a multiplexer, a direct current separator and a processing module; the OBU vehicle-mounted equipment is provided with an ETC electronic toll collection system antenna; wherein, the multiplexer respectively with GPS antenna, V2X antenna link to each other, the multiplexer with OBU mobile unit passes through first radio frequency end and connects, direct current separator with the multiplexer passes through the second radio frequency end and connects, direct current shunt with OBU mobile unit passes through the power end and connects, processing module with direct current separator links to each other. By adopting the embodiment of the application, the OBU, the GPS and the V2X functions can be integrated, the size of the antenna is effectively reduced on the premise of not reducing the working performance of the antenna, and the installation space is saved.

Description

Vehicle-mounted equipment

Technical Field

The application relates to the technical field of antennas, in particular to vehicle-mounted equipment.

Background

The vehicle-to-anything (V2X) communication system is a communication system capable of supporting vehicle-to-vehicle (V2V) communication and vehicle-to-infrastructure (V2I) communication. While traveling on a road (e.g., an expressway or a general road), the V2X communication system may notify a driver of a vehicle of a dangerous situation that may be encountered in an area ahead of the driver's vehicle, or may notify another vehicle located in an area behind the driver's vehicle through V2I communication of a dangerous situation to reduce the number of traffic accidents. The GPS function is a function of receiving satellite signals to perform positioning or navigation. ETC (Eletcronic Toll colletCion, non-stop Toll collection system) is the most advanced road and bridge Toll collection mode in the world at present, information interaction is realized by using a special short-range communication technology (DSRC) between a vehicle-mounted electronic tag (OBU) installed on a vehicle and road side equipment (RSU) on a Toll station lane, and then background settlement processing is carried out with a bank through computer networking, so that the purpose of paying without stopping the vehicle is achieved. The antenna is necessary for receiving signals in the above functions, and because the antenna for implementing the V2X function operates between 5.905GHz and 5.925GHz, the GPS antenna operates in the L1 frequency band or the L5 frequency band, i.e., 1.57542GHz, and the antenna for implementing the OBU function operates in 5.8GHz, which means that more than one antenna device is required to implement the above functions.

In the prior art, the V2X vehicle-mounted device antenna adopts a dish-shaped antenna and a mushroom-shaped antenna, and the antenna has the problems of large size, unattractive appearance, inconvenient installation and the like, and the vehicle-mounted device in the current technical scheme is a device with large size and more occupied space, and the requirement on the installation position is harsh, so the miniaturization of the vehicle-mounted antenna device is also an urgent problem to be solved.

In view of the above, the present invention has been made to provide an in-vehicle apparatus that overcomes or at least partially solves the above problems.

Disclosure of Invention

The embodiment of the application provides a mobile unit, can integrate OBU, GPS and V2X function, effectively reduce the antenna volume under the working property prerequisite that does not reduce the antenna, practices thrift installation space. The technical scheme is as follows:

the application provides a mobile unit, includes: the system comprises a GPS antenna, a V2X antenna, OBU vehicle-mounted equipment, a multiplexer, a direct current separator and a processing module; the OBU vehicle-mounted equipment is provided with an ETC electronic toll collection system antenna;

the system comprises a GPS antenna, a V2X antenna, a multiplexer, a direct current splitter, a processing module and an OBU vehicle-mounted device, wherein the multiplexer is respectively connected with the GPS antenna and the V2X antenna, the multiplexer is connected with the OBU vehicle-mounted device through a first radio frequency end, the direct current splitter is connected with the multiplexer through a second radio frequency end, the direct current splitter is connected with the OBU vehicle-mounted device through a power supply end, and the processing module is connected with the direct current splitter;

the OBU vehicle-mounted equipment is used for receiving the ETC radio-frequency signal of a first frequency band through the ETC antenna in a receiving mode;

the GPS antenna is used for receiving a GPS radio frequency signal of an L1 frequency band in the receiving mode;

the V2X antenna is used for receiving V2X radio frequency signals of a second frequency band in the receiving mode;

the multiplexer is used for performing filtering and isolating processing after receiving the ETC radio frequency signal, the GPS radio frequency signal and the V2X radio frequency signal in the receiving mode, and sending one or more radio frequency signals to the direct current separator;

the direct current separator is used for isolating a radio frequency signal obtained after the filtering and isolating processing of the multiplexer and a direct current signal transmitted by the processing module in the receiving mode, sending the radio frequency signal to the processing module, and sending the direct current signal to the OBU vehicle-mounted equipment;

the processing module is configured to perform decoding processing after receiving the radio frequency signal in a receiving mode, and transmit the dc electrical signal to the dc splitter.

In one or more possible embodiments, the on-board unit proposed by the present application further includes: a housing; the shell consists of an antenna housing and a base, and a cavity is formed between the antenna housing and the base;

the GPS antenna, the V2X antenna, the OBU mobile unit, the multiplexer and the DC separator package are in the casing.

In one or more possible embodiments, the housing is fixed above a windshield of the vehicle;

the processing module is arranged in the vehicle and connected with the shell through a power connecting wire.

In one or more possible embodiments, the V2X antenna is a microstrip patch array antenna; wherein the V2X antenna is printed on an insulated antenna board.

In one or more possible embodiments, a limiting clamping groove is arranged on the base, and two sides of the limiting clamping groove are provided with buckles;

the insulating antenna board is arranged in the limiting clamping groove, and the buckles are fixed on two sides of the insulating antenna board.

In one or more possible embodiments, the GPS antenna is a ceramic antenna; wherein the ceramic antenna is an eccentric feed-in ceramic antenna or a center feed-in ceramic antenna.

In one or more possible embodiments, the on-board unit proposed by the present application further includes: the device comprises a bracket, a holder and a driving motor;

a cradle head rotating along a horizontal plane is arranged on a base of the shell, a support rotating along a vertical plane is arranged on the cradle head, and the support supports the GPS antenna;

the driving motor is used for driving the support and the holder to rotate.

In one or more possible embodiments, the radome is shark fin-shaped;

the OBU mobile unit with the cloud platform sets up in the first space of casing rear end, the V2X antenna setting is in the second space of casing front end.

In one or more possible embodiments, a cushion is provided between the base and the windshield.

In one or more possible embodiments, the processing module is further configured to generate a mixed signal in a transmission mode, and send the mixed signal to the dc splitter; wherein the mixed signal comprises the V2X radio frequency signal and the direct current signal;

the dc splitter is further configured to split the mixed signal into the dc signal and the V2X rf signal in the transmit mode, and send the V2X rf signal to the multiplexer;

the multiplexer is further configured to transmit the V2X rf signal to the V2X antenna in a transmit mode, so that the V2X antenna transmits the V2X rf signal to a receiving device.

The beneficial effects brought by the technical scheme provided by some embodiments of the application at least comprise: with GPS antenna, V2X antenna, OBU mobile unit integration in a mobile unit, realize the integration and the miniaturization of mobile unit under the prerequisite that possesses ETC function, V2X car networking function and GPS function, effectively practice thrift installation space, reduce cost satisfies complicated equipment fixing demand and installation environment.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic system structure diagram of an on-board device provided in an embodiment of the present application;

FIG. 2 is a schematic physical structure diagram of an in-vehicle device provided in an embodiment of the present application;

fig. 3 is a schematic structural diagram of a GPS antenna according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of a V2X antenna provided in an embodiment of the present application;

FIG. 5 is a schematic installation diagram of an in-vehicle device provided in an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it is to be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present application, it is noted that, unless explicitly stated or limited otherwise, "including" and "having" and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art. Further, in the description of the present application, "a plurality" means two or more unless otherwise specified. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.

The present application will be described in detail with reference to specific examples.

As shown in fig. 1, a schematic system structure diagram of an on-board device provided in an embodiment of the present application includes: a GPS antenna 102, a V2X antenna 103, an OBU onboard device 101, a multiplexer 104, a dc splitter 105 and a processing module 106. The multiplexer 104 is connected with the GPS antenna 102 and the V2X antenna 103 respectively, the multiplexer 104 is connected with the OBU vehicle-mounted device 101 through a first radio frequency end, the direct current splitter 105 is connected with the multiplexer 104 through a second radio frequency end, the direct current splitter 105 is connected with the OBU vehicle-mounted device 101 through a power supply end, and the processing module 106 is connected with the direct current splitter 105.

The oub (on board Unit) vehicle-mounted device 101 may be understood as a microwave device that communicates with an RSU (RSU-Road Side Unit) on a lane of a toll station by using a DSRC (Dedicated Short Range Communication) technology, and realizes information interaction by using the DSRC technology between an embedded ETC antenna and the RSU, thereby settling with a bank server through the processing module 106 to achieve non-stop payment. It can be understood that the OUB vehicle-mounted device 101 further includes units such as a radio frequency transceiver circuit, a baseband processing circuit, an ESAM security module, a power supply battery and a corresponding charging circuit, and a 2.4GHz carrier communication circuit, so as to complete the OUB function.

The GPS antenna 102, which may be understood as an antenna for positioning or navigation by receiving satellite signals, receives and transmits radio frequency signals in the L1 frequency band, i.e., circularly polarized signals at 1.575 GHz.

V2X (Vehicle to outside information interaction) antenna 103 is understood to be an efficient wireless communication technology to realize the identification and two-way communication of moving objects in high-speed motion in a specific small area. For example, V2X can implement wireless communication with a maximum of 300m to 1000m and an end-to-end delay of less than 100ms, is not obstructed by a line of sight, is a relatively mature vehicle-to-vehicle communication scheme, and can be applied to an autonomous driving vehicle fleet, that is, an interval of 10 meters or less before and after the autonomous driving vehicle fleet is maintained at a vehicle speed of 100km/h, so that the vehicle efficiency can be improved, and traffic congestion, pollution and passenger stress can be reduced.

The multiplexer 104 may be understood as a multi-channel synthesizer that allows multiple antennas to transmit or receive radio frequency signals of different frequency bands without interfering with each other. For example, the multiplexer 104 is connected to an ETC antenna in the OBU vehicle-mounted device 101 through a first radio frequency end, and is connected to the GPS antenna 102 and the V2X antenna 103 through radio frequency connection lines, respectively, and a filter is disposed at a connection end of each antenna, so that the ETC antenna receives an ETC radio frequency signal in a first frequency band, the first frequency band is 5.8GHz, the V2X antenna 103 transmits a V2X radio frequency signal in a second frequency band, the second frequency band is 5.905GHz to 5.925GHz, and the GPS antenna 102 transmits a GPS radio frequency signal in an L1 frequency band.

The dc splitter 105 may be understood as a device for separating the rf signal from the dc signal, for example, a dc blocking capacitor is provided at the rf terminal, and a high-frequency choke inductor is provided at the power supply terminal. In this application, the dc splitter 105 is used to isolate the rf signal from the dc signal, and send the rf signal to the multiplexer 104 or the processing module 106, and send the dc signal to the OBU module 101.

The processing module 106 may include one or more processing cores. The processing module 106 interfaces various components throughout the vehicle using various interfaces and lines to perform various functions of the vehicle and to process data by executing or executing instructions, programs, code sets, or instruction sets stored in memory, and invoking data stored in memory. Optionally, the Processing module 106 may be implemented in at least one hardware form of Digital Signal Processing (DSP), Field-Programmable Gate Array (FPGA), and Programmable Logic Array (PLA). The Processing module 106 may integrate one or more of a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), a modem, and the like. The modem may not be integrated into the processing module 106, and may be implemented by a single chip.

The multiplexer 104 is connected with the GPS antenna 102, the multiplexer 103 is connected with the V2X antenna 103, and the multiplexer 104 is connected with the OBU vehicle-mounted device 101 through radio frequency connection lines; the direct current separator 105 is connected with the OBU vehicle-mounted device 101 through a power connecting line, and the power connecting line is used for supplying power to the OBU vehicle-mounted device 101, such as 24V power supply; the dc splitter 105 and the multiplexer 104, and the dc splitter 105 and the processing module 106 are connected by one or more of a controller area network bus, an ethernet bus, or a vehicle ethernet bus. The ethernet bus referred to in the present application refers to a common conventional ethernet bus; and the vehicle ethernet bus is a physical network for connecting various electrical devices in the automobile. The onboard ethernet is designed to meet some special requirements in an onboard environment. For example: the requirements of the vehicle-mounted equipment on the electrical characteristics are met; the requirements of the vehicle-mounted equipment on the applications such as high bandwidth, low delay, audio and video synchronization and the like are met; the requirements of the vehicle-mounted system on network management are met, and the like. Therefore, it can be understood that the vehicle-mounted ethernet changes the electrical characteristics of the physical interface based on the common traditional ethernet protocol, and specifically customizes some new standards according to the requirements of the vehicle-mounted network.

In one embodiment, when the vehicle is in the receiving mode, the multiplexer 104 receives the ETC rf signal, the GPS rf signal, and the V2X rf signal, performs filtering and isolating processes, and sends one or more rf signals to the dc splitter 105, such as the V2X rf signal; the dc separator 105 isolates the rf signal obtained by filtering and isolating the multiplexer 104 from the dc signal transmitted by the processing module 106, and sends the V2X rf signal to the processing module 106, and sends the dc signal to the OBU onboard device 101; the processing module 106 receives the V2X rf signal, decodes the rf signal, and transmits the dc signal to the dc splitter 105. In the receiving mode, the multiplexer 104 may also send the GPS rf signal or the ETC rf signal to the dc splitter 105, and the working principle is as above, which is not described herein again.

The beneficial effects brought by the technical scheme provided by some embodiments of the application at least comprise: filtering and isolating the GPS radio frequency signal, the V2X radio frequency signal and the ETC radio frequency signal through a multiplexer, so that the processing module receives one of the radio frequency signals to realize one of the OBU function, the GPS function or the V2X function; the direct current separator is used for isolating the direct current signal and the radio frequency signal so as to ensure that the OBU vehicle-mounted equipment safely and stably executes the OBU function after the OBU vehicle-mounted equipment is powered; by utilizing the units, the vehicle has the functions of GPS navigation or positioning, V2X Internet of things communication, non-stop toll collection and the like, and the functionality and the competitive value of the vehicle are improved.

In one embodiment, the processing module 106 generates a mixed signal when the vehicle is in the transmit mode and sends the mixed signal to the direct current splitter 105; the mixed signal comprises a V2X radio frequency signal and a direct current signal; the dc separator 105 separates the mixed signal into a dc signal and a V2X rf signal, and sends the V2X rf signal to the multiplexer 104; the multiplexer 104 transmits the V2X rf signal to the V2X antenna 102, so that the 1V2X antenna 102 transmits the V2X rf signal to the receiving device; wherein the receiving device may be a V2X antenna of another vehicle, or a device such as a base station that can receive a V2X antenna. In the above-mentioned transmission mode, the mixed signal generated by the processing module 106 may also include an ETC video signal and a dc signal, and the working principle is as above, which is not described herein again.

The beneficial effects brought by the technical scheme provided by some embodiments of the application at least comprise: when the vehicle is in a receiving mode, the processing module provides the mixed signal to the direct current separator, so that the direct current separator separates out a direct current signal and then supplies power to the OBU vehicle-mounted equipment, and the OBU vehicle-mounted equipment can safely and stably execute the OBU function; the direct current separator separates the mixed signal into one of a GPS radio frequency signal, a V2X radio frequency signal and an ETC radio frequency signal, and the signals are transmitted by corresponding antennas to realize the execution of one of an OBU function, a GPS function or a V2X function; by utilizing the units, the vehicle has the functions of GPS navigation or positioning, V2X Internet of things communication, non-stop toll collection and the like, and the functionality and the competitive value of the vehicle are improved.

This application is integrated in a mobile unit with GPS antenna, V2X antenna, OBU mobile unit, realizes the integration and the miniaturization of mobile unit under the prerequisite that possesses ETC function, V2X car networking function and GPS function, effectively practices thrift installation space, and reduce cost satisfies complicated equipment fixing demand and installation environment.

As shown in fig. 2, a physical structure schematic diagram of an on-board device provided in an embodiment of the present application includes a housing, the housing is composed of a radome 201 and a base 202, a cavity is formed between the radome 201 and the base 202, and the GPS antenna 102, the V2X antenna 103, the OBU on-board device 101, a multiplexer (not shown in the figure), and a dc splitter (not shown in the figure) are enclosed in the housing.

In the present application, the radome 201 has a shark fin shape, the OBU onboard apparatus 101 and the GPS antenna are disposed in a first space at the rear end of the housing, and the V2X antenna 103 is disposed in a second space at the front end of the housing. It is understood that the leading end refers to the tip portion of the shark fin and the trailing end refers to the tail portion of the shark fin, and the volume of the first space is greater than the volume of the second space. The beneficial effects brought by the technical scheme provided by some embodiments of the application at least comprise: the shark fin antenna has high integration level and is more attractive; the resistance caused by the shell in the running process of the vehicle is reduced, and the shark fin-shaped structure is designed; the V2X antenna, the OBU antenna and the GPS antenna are reasonably arranged in the shark fin shell, so that interference generated when the antenna works is avoided, and the working performance and reliability of the antenna are improved.

In one embodiment, the shark fin antenna structure further comprises a sealing ring 203 with a height H, preferably, 3mm ≦ H ≦ 5 mm. The sealing ring 203 is fixed to the base 202 by adhesion and is sleeved in the mounting hole 204. The beneficial effects brought by the technical scheme provided by some embodiments of the application at least comprise: the sealing ring is arranged to serve as sealing protection, so that the sealing effect of the connection part of the shark fin antenna and the vehicle is improved; the sealing performance of the connection part of the shark fin antenna and the vehicle connection part is realized, and rainwater or dust is prevented from entering the automobile from the shark fin antenna and the connection part.

As shown in fig. 3, a schematic structural diagram of a GPS antenna provided in the embodiment of the present application includes: GPS antenna 102, mount 301, rotary motor 302, and pan/tilt head 303. A holder 303 rotating along a horizontal plane is arranged on the base 202 of the shell, a bracket 301 rotating along a vertical plane is arranged on the holder 303, and the bracket 301 supports the GPS antenna 102; the driving motor 302 is used for driving the support 301 and the pan/tilt head 302 to rotate.

In the present embodiment, in order to improve the signal receiving capability, the GPS antenna 102 is a ceramic antenna, and preferably, the GPS antenna 102 is an eccentric feed-in ceramic antenna or a central feed-in ceramic antenna.

The pan/tilt head 303, which may be understood as a support frame of cylindrical structure, rotates along a horizontal plane, for example, by +30 ° to-30 °.

The holder 301 may be understood as a support frame that rotates along a plumb line about a fulcrum. The bracket 301 is provided with a damping spring for reducing the influence of the bumping during the running of the vehicle on the GPS antenna 102. In the embodiment of the present application, one end of the bracket 301 is fixedly connected to the GPS antenna 102, and the other end of the bracket 301 is movably connected to the pan/tilt head 303 through a driving motor 302, and the like, and preferably, the inclination angle between the GPS antenna 102 and the upper surface of the pan/tilt head 303 is 0 ° to 35 °.

And a driving motor 302 for providing a driving force for the support 301 and the pan/tilt head 303, wherein a control line and a signal line (not shown in the figure) are arranged below the base 202, the control line is connected with the driving motor 302, so that the control end sends a control signal to the driving motor, and the control signal is used for instructing the driving motor 302 to drive one or both of the pan/tilt head 303 and the support 301 to rotate.

The beneficial effects brought by the technical scheme provided by some embodiments of the application at least comprise: the GPS antenna reasonably adjusts the vertical inclination angle and the horizontal angle position according to the signal intensity so as to improve the effective contact surface of the GPS antenna and a GPS radio frequency signal, thereby improving the received signal intensity of the GPS antenna, improving the positioning precision, reducing the probability of losing signals in cities, and having the advantages of accurate positioning, high precision, simple operation, quick effect, good anti-interference performance and blind area reduction.

As shown in fig. 4, a schematic structural diagram of a V2X antenna provided in this embodiment of the present application includes: V2X antenna 103, insulating antenna plate 1031, be provided with spacing draw-in groove 401 on the base 202, draw-in groove 401 both sides are provided with buckle 402.

The V2X antenna 103 is a microstrip patch array antenna printed on the insulating antenna board 401, and the insulating antenna board 401 may be made of a plastic material, such as ABS plastic (Acrylonitrile butadiene styrene plastic), TPE (Thermoplastic Elastomer), PA plastic (Polyamide), or the like, to avoid shielding the signal of the V2X antenna 103 with a metal material.

In the embodiment, the V2X antenna 103 is pushed into the limiting slot 401 and pushed tightly, and the fasteners 402 are fixed to two sides of the insulated antenna plate 1031, so that the insulated antenna plate 1031 is attached to the base 202, and the impact on the V2X antenna 103 caused by bumping during the driving process of the vehicle is avoided.

The beneficial effects brought by the technical scheme provided by some embodiments of the application at least comprise: the V2X antenna is fixed in the shell in a slipknot type fixing mode, so that the convenience of dismounting and replacing the V2X antenna in subsequent use is improved; the V2X antenna is printed with an insulating sheet material to avoid using a metal material to shield the signal of the V2X antenna.

As shown in fig. 5, an installation schematic diagram of an on-board device provided in an embodiment of the present application includes: the vehicle-mounted device 501 is arranged at the upper left corner of a windshield 502, the processing module 106 is arranged in a front cabin of the vehicle, and the processing module 106 is connected with the vehicle-mounted device 501 through a cable.

In the present embodiment, a cushion pad is provided between the vehicle-mounted device 501 and the windshield 502 to avoid impact on devices such as a V2X antenna, a GPS antenna, and an OBU module in the vehicle-mounted device 501 during vehicle driving.

It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a read-only memory or a random access memory.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present application and is not to be construed as limiting the scope of the present application, so that the present application is not limited thereto, and all equivalent variations and modifications can be made to the present application.

Claims

1. An in-vehicle apparatus, characterized by comprising: the system comprises a GPS antenna, a V2X antenna, OBU vehicle-mounted equipment, a multiplexer, a direct current separator and a processing module; the OBU vehicle-mounted equipment is provided with an ETC electronic toll collection system antenna;

2. The in-vehicle apparatus according to claim 1, characterized by further comprising: a housing; the shell consists of an antenna housing and a base, and a cavity is formed between the antenna housing and the base;

3. The in-vehicle apparatus according to claim 2, wherein the housing is fixed above a windshield of a vehicle;

4. The vehicle-mounted device according to claim 2, wherein the V2X antenna is a microstrip patch array antenna; wherein the V2X antenna is printed on an insulated antenna board.

5. The vehicle-mounted equipment according to claim 4, wherein a limiting clamping groove is formed in the base, and buckles are arranged on two sides of the limiting clamping groove;

6. The in-vehicle apparatus according to claim 4, wherein the GPS antenna is a ceramic antenna; wherein the ceramic antenna is an eccentric feed-in ceramic antenna or a center feed-in ceramic antenna.

7. The method of claim 6, further comprising: the device comprises a bracket, a holder and a driving motor;

the driving motor is used for driving the support and the holder to rotate.

8. The vehicle-mounted apparatus according to claim 7, wherein the radome is shark fin-shaped;

9. The in-vehicle apparatus according to claim 2, wherein a cushion pad is provided between the base and the windshield.

10. The in-vehicle apparatus according to claim 1,

the processing module is further configured to generate a mixed signal in a transmission mode, and send the mixed signal to the dc separator; wherein the mixed signal comprises the V2X radio frequency signal and the direct current signal;