CN114401501A - Time service device and time service method for vehicle-mounted unit of V2X, vehicle V2X device and vehicle - Google Patents
Time service device and time service method for vehicle-mounted unit of V2X, vehicle V2X device and vehicle Download PDFInfo
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- CN114401501A CN114401501A CN202210044279.8A CN202210044279A CN114401501A CN 114401501 A CN114401501 A CN 114401501A CN 202210044279 A CN202210044279 A CN 202210044279A CN 114401501 A CN114401501 A CN 114401501A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/001—Synchronization between nodes
- H04W56/0015—Synchronization between nodes one node acting as a reference for the others
Abstract
The utility model relates to a time service device, time service method, vehicle V2X equipment and vehicle of V2X on-board unit can be applied to unmanned/automatic vehicle technical field, and this time service device includes: the switch switching chip is arranged in the V2X vehicle-mounted unit, is connected to a main controller of the V2X vehicle-mounted unit, and is used for outputting a time service signal to the main controller; the internal time service module is arranged in the V2X vehicle-mounted unit, is connected to the switch switching chip and is used for outputting an internal time service signal; the external time service module is arranged outside the V2X vehicle-mounted unit, is connected to the switch switching chip through a cable and is used for outputting an external time service signal; when the switch switching chip is switched to a first state, the switch switching chip takes the internal time signal as output, and when the switch switching chip is switched to a second state, the switch switching chip takes the external time signal as output.
Description
Technical Field
The disclosure relates to the technical field of unmanned/automatic driving vehicles, in particular to a time service device and a time service method of a V2X vehicle-mounted unit, a vehicle V2X device and a vehicle.
Background
At present, in the field of vehicles, a Vehicle networking communication technology (V2X, Vehicle to evolution) has been widely applied to the automatic/unmanned Vehicle networking and Vehicle-road coordination of vehicles, V2X generally includes a Vehicle-mounted unit, a road side unit, a sensing device, a cloud platform and other multiple devices, and each device often has a great delay through a network time service form during the Vehicle operation process, which may seriously affect the speed of collecting and processing the conditions encountered by the Vehicle, generally speaking, an existing V2X Vehicle-mounted unit carries out time service through an internal time service module equipped inside, and because the internal time service precision is low and is likely to cause a great delay, in the related technology, a high-precision external time service device mounted outside the Vehicle-mounted unit is adopted to carry out time service on the V2X Vehicle-mounted unit.
In the course of implementing the disclosed concept, the inventors found that there are at least the following technical problems in the related art:
the V2X vehicle-mounted unit is timed through the external timing device, the vehicle-mounted unit needs to be modified to access the external timing device, therefore, besides the interface connected with the internal timing module, a group of interfaces needs to be reserved additionally for modifying and accessing the external timing device, which causes waste of interface resources of the main controller, the same group of signal channels can not be used for compatibility and switching the internal timing signal and the timing signal of the external device, and if the external timing is realized through the method, the internal software program is required to be changed to communicate with the external timing device, which results in larger workload and can not flexibly and rapidly realize access of the external timing device.
Disclosure of Invention
In order to at least solve the technical problems that the internal time service signal and the time service signal of the external device cannot be switched by using the same group of signal channels and the external time service device cannot be accessed by changing the internal software program in the related art, the embodiment of the disclosure provides a time service device and a time service method of a V2X vehicle-mounted unit, a vehicle V2X device and a vehicle.
In a first aspect, an embodiment of the present disclosure provides a time service apparatus for a V2X onboard unit, the time service apparatus including: a switch switching chip, which is arranged in the V2X vehicle-mounted unit, is connected to a main controller of the V2X vehicle-mounted unit, and is used for outputting a time signal to the main controller; an internal time service module, which is arranged in the V2X vehicle-mounted unit, is connected to the switch switching chip and is used for outputting an internal time service signal; an external time service module which is arranged outside the V2X vehicle-mounted unit, is connected to the switch switching chip through a cable, and is used for outputting an external time service signal; when the switch switching chip is switched to a first state, the switch switching chip takes the internal timing signal as an output, and when the switch switching chip is switched to a second state, the switch switching chip takes the external timing signal as an output.
According to an embodiment of the present disclosure, the switch switching chip includes an enable terminal, and the switch switching chip switches the internal timing signal and the external timing signal as an output according to a level of the enable terminal; when the enable terminal is at a high level, the switch switching chip is switched to the first state, and the switch switching chip is used for outputting the internal time service signal to the main controller; when the enable terminal is at a low level, the switch switching chip is switched to the second state, and the switch switching chip is used for outputting the external timing signal to the main controller.
According to an embodiment of the present disclosure, the time service device further includes: and a hardware detection circuit disposed in the V2X onboard unit, wherein a pull-down resistor is disposed between one end of the hardware detection circuit and an enable terminal of the switch switching chip, and when the hardware detection circuit detects that the external timing module is connected to the hardware detection circuit, the enable terminal is grounded through the pull-down resistor, so that the enable terminal is at a low level.
According to the embodiment of the disclosure, a pull-up resistor is arranged between the enabling end of the switch switching chip and the universal input/output port of the main controller; when the hardware detection circuit does not detect that the external time service module is connected to the hardware detection circuit, the enable end is connected to a general input/output port of the main controller through the pull-up resistor, so that the enable end is at a high level.
According to an embodiment of the present disclosure, the switch switching chip includes a first input end and a second input end, the internal time service module is connected to the first input end of the switch switching chip, and the hardware detection circuit is connected to the second input end of the switch switching chip; in the first state, an internal time signal output by the internal time signal module is transmitted to the first input end as an input of the switch switching chip, and the switch switching chip outputs the internal time signal to the main controller; in the second state, an external time signal output by the external time signal module is transmitted to the second input terminal via the cable and the hardware detection circuit as an input of the switch switching chip, and the switch switching chip outputs the external time signal to the main controller.
According to an embodiment of the present disclosure, the hardware detection circuit includes a signal interface connector, and a metal elastic sheet is disposed on the signal interface connector; under the condition that the metal elastic sheet is not connected with the cable, the metal elastic sheet is suspended in the air, so that the enabling end is in a high level; and under the condition that the external time service module is connected to the metal elastic sheet through a cable, the external time service module is connected into the hardware detection circuit, so that the enabling end is at a low level.
According to the embodiment of the disclosure, the external time service module comprises a posture data acquisition module, and the posture data acquisition module is used for acquiring gyroscope information of the vehicle posture; in the second state, the gyroscope information is transmitted to the main controller through the cable and the switch switching chip.
In a second aspect, an embodiment of the present disclosure provides a time service method for a V2X onboard unit, the time service method including: the time service device of the V2X vehicle-mounted unit is used for carrying out time service on the V2X vehicle-mounted unit, and comprises an internal time service module arranged in the V2X vehicle-mounted unit, a switch switching chip and an external time service module arranged outside the V2X vehicle-mounted unit; when the external time service module is not connected to the V2X vehicle-mounted unit, time service is carried out on the V2X vehicle-mounted unit through the internal time service module; when the external time service module is connected to the V2X onboard unit, time service is performed to the V2X onboard unit through the external time service module.
In a third aspect, embodiments of the present disclosure provide a vehicle V2X apparatus including a V2X on-board unit, the V2X on-board unit including the time service device of the V2X on-board unit as described above.
In a fourth aspect, embodiments of the present disclosure provide a vehicle including a V2X on-board unit or vehicle V2X device as described above.
The technical scheme provided by the embodiment of the disclosure at least has part or all of the following advantages:
the flexible switching between the internal time service mode and the external time service mode is realized by setting a switch switching chip, the use of the time service signal which is compatible with the same group of signal channels and switches the internal time service signal and the external equipment can be realized, the communication between an internal software program and the external time service equipment is not required to be changed, the internal time service can be realized under the scene needing the internal time service, meanwhile, the internal time service switching can be realized under the application scene needing the high-precision external time service, the interface resource utilization rate of a main controller of the vehicle-mounted unit is greatly improved, the access can be conveniently and quickly realized, and the flexibility and the convenience are improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.
In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the related art will be briefly described below, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a schematic structural diagram of a time service device of a V2X vehicle-mounted unit according to one embodiment of the disclosure; and
FIG. 2 is a flow chart schematically illustrating a timing method of a V2X vehicle-mounted unit according to an embodiment of the disclosure.
Detailed Description
At present, the Vehicle networking and Vehicle road cooperation based on the Vehicle networking communication technology (V2X) is the key for realizing automatic driving, which can greatly reduce road traffic accidents and improve traffic efficiency, and the key of the automatic driving is the speed of collecting and processing the encountered conditions in the Vehicle running process of equipment.
In the prior art, most of the time service of the vehicle-mounted unit adopts a mode that an internal time service module directly connects a board-end serial port signal and a 1pps signal to directly provide time service for a main controller. In the prior art, the internal time service mode is mostly adopted for the time service of the vehicle-mounted unit, the mode has low cost and low precision, and the time service mode can cause great time delay under the scene with strict requirement on time precision.
Therefore, in order to realize time service with higher precision and low time delay, in the related art, high-precision time service equipment is generally adopted to time each equipment (including an on-board unit) independently, and data including time is uploaded and the like. For example, high-precision external time service equipment is adopted to time service the on-board unit, namely, the main controller is connected with the signal interface connector through a group of signal channels, the channels are different from the channels connected with the internal time service module, an interface of the main controller is additionally occupied, the signal interface connector is used as an interface and connected with the external high-precision time service equipment through an external cable, the external high-precision time service equipment is connected to the on-board unit interface through the cable, and the serial port signal and the 1pps signal are indirectly transmitted to the main controller to time the on-board unit.
Therefore, in the mode of time service for the V2X onboard unit through the external time service equipment, the onboard unit needs to be modified to access the external time service equipment, so that in addition to the interface connected with the internal time service module, an additional set of interfaces needs to be reserved for modifying and accessing the external time service equipment in the interface of the main controller, which causes waste of interface resources of the main controller, and the internal time service signal and the time service signal of the external equipment cannot be switched by using the same set of signal channels, and if the external time service is realized through the above mode, the internal software program needs to be modified to communicate with the external time service equipment, which results in large workload and the access of the external time service equipment cannot be realized flexibly and rapidly.
In view of the above, an embodiment of the present disclosure provides a time service device of a V2X onboard unit, the time service device including: a switch switching chip, which is arranged in the V2X vehicle-mounted unit, is connected to a main controller of the V2X vehicle-mounted unit, and is used for outputting a time signal to the main controller; an internal time service module, which is arranged in the V2X vehicle-mounted unit, is connected to the switch switching chip and is used for outputting an internal time service signal; an external time service module which is arranged outside the V2X vehicle-mounted unit, is connected to the switch switching chip through a cable, and is used for outputting an external time service signal; when the switch switching chip is switched to a first state, the switch switching chip takes the internal timing signal as an output, and when the switch switching chip is switched to a second state, the switch switching chip takes the external timing signal as an output.
The time service device of the V2X vehicle-mounted unit provided by the embodiment of the disclosure can realize the compatibility of using the same group of signal channels and switching the time service signals of internal time service signals and external equipment, and does not need to change an internal software program to communicate with the external time service equipment, can realize internal time service in a scene needing internal time service, and can realize the switching of the internal time service into external time service in an application scene needing high-precision external time service, thereby greatly improving the interface resource utilization rate of the vehicle-mounted unit main controller, conveniently and quickly realizing access, and improving the flexibility and convenience.
To make the objects, technical solutions and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be described clearly and completely with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are some embodiments of the present disclosure, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.
It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the same element.
The first exemplary embodiment of the disclosure provides a time service device of a V2X vehicle-mounted unit.
Fig. 1 schematically shows a structural diagram of a time service device of a V2X vehicle-mounted unit according to an embodiment of the present disclosure.
Referring to fig. 1, a time service apparatus of a V2X in-vehicle unit according to an embodiment of the present disclosure, the V2X in-vehicle unit 100 includes a main controller, and the time service apparatus includes: a switch switching chip, which is provided in the in-vehicle unit, is connected to the main controller of the V2X in-vehicle unit, and outputs a time signal to the main controller; an internal time service module, which is arranged in the V2X vehicle-mounted unit, is connected to the switch switching chip and is used for outputting an internal time service signal; and an external time service module which is arranged outside the V2X vehicle-mounted unit, is connected to the switch switching chip through a cable, and is used for outputting an external time service signal.
When the switch switching chip is switched to a first state, the switch switching chip takes the internal timing signal as an output, and when the switch switching chip is switched to a second state, the switch switching chip takes the external timing signal as an output. The first state can be understood as an internal time service mode, time service is carried out on the main controller through an internal time service signal, and the second state can be understood as an external time service mode, and time service is carried out on the main controller through an external time service signal.
Specifically, the internal time service module of the time service device according to the embodiment of the disclosure may be an internal time service module. The main controller of the vehicle-mounted unit can be connected with the internal timing module through a group of serial port signals and a general input/output signal interface, can be connected with the switch switching chip through a port and is used for transmitting the serial port signals, can transmit the internal serial port signals and the internal 1pps signals in a first state, comprises internal timing information (for example, time signals provided by the internal timing module), can also comprise other data such as positioning information, and can transmit the external serial port signals and the external 1pps signals in a second state, comprises external timing information (for example, time signals provided by an external clock source signal), and can also comprise other data such as positioning information.
Optionally, the switch switching chip includes an enable terminal, the switch switching chip switches the internal time signal and the external time signal as an output according to a level of the enable terminal, and when the enable terminal is at a high level, the switch switching chip switches to the first state, and the switch switching chip is configured to output the internal time signal to the main controller; when the enable terminal is at a low level, the switch switching chip is switched to the second state, and the switch switching chip is used for outputting the external timing signal to the main controller.
Specifically, the switch switching chip may be any type of component for implementing state switching (switching between the internal time service mode and the external time service mode), and includes multiple types of switch switching chips, for example, a TS5a23159 type of chip, and other multiple types of chips.
For example, the switch switching chip may include an enable terminal, for example, an enable pin, and when the enable pin is at a high level, the selection mode of the chip is that the internal module performs time service on the main controller, and the internal time service signal output by the internal time service module is accessed to the main controller; when an external timing module (for example, an external high-precision device) is connected to the in-vehicle unit interface via a cable, the enable pin of the chip is grounded and lowered, and the chip is switched to a second state (external timing mode), that is, an external timing signal output by the external timing module is inputted to the main controller.
Optionally, the time service device further includes: and a hardware detection circuit disposed in the V2X onboard unit, wherein a pull-down resistor is disposed between one end of the hardware detection circuit and an enable terminal of the switch switching chip, and when the hardware detection circuit detects that the external timing module is connected to the hardware detection circuit, the enable terminal is grounded through the pull-down resistor, so that the enable terminal is at a low level.
Specifically, the hardware detection circuit is configured to detect whether an external time service module is connected to the hardware detection circuit, and when it is detected that the external time service module is connected to the hardware detection circuit, the enable pin is grounded through a pull-down resistor, so that the enable terminal is at a low level, and the switching mode is a second state, that is, an external time service signal output by the external time service module is connected to the main controller.
Optionally, a pull-up resistor is disposed between the enable terminal of the switch switching chip and the general input/output port of the main controller; when the hardware detection circuit does not detect that the external time service module is connected to the hardware detection circuit, the enable end is connected to a general input/output port of the main controller through the pull-up resistor, so that the enable end is at a high level.
Specifically, an enable pin of the chip may be connected to a general purpose input/output port (GPIO port) through a pull-up resistor, and a default state of the GPIO port of the main controller is a high level, so that when the external timing module is not connected to the hardware detection circuit, that is, the enable pin of the chip is a high level, the internal timing module is connected to the main controller through the switch switching chip, thereby providing an internal timing signal for timing the main controller.
Optionally, the switch switching chip includes a first input end and a second input end, the internal time service module is connected to the first input end of the switch switching chip, and the hardware detection circuit is connected to the second input end of the switch switching chip; in the first state, an internal time signal output by the internal time signal module is transmitted to the first input end as an input of the switch switching chip, and the switch switching chip outputs the internal time signal to the main controller; in the second state, an external time signal output by the external time signal module is transmitted to the second input terminal via the cable and the hardware detection circuit as an input of the switch switching chip, and the switch switching chip outputs the external time signal to the main controller.
Specifically, the switch switching chip as exemplified above may be any type of component for implementing state switching (switching between the internal time service mode and the external time service mode), and includes switch switching chips of various types, for example, a chip of TS5a23159 type, and chips of various other types. The switch switching chip at least comprises an enable end, an output end, a first input end and a second input end, and the output of the chip is controlled by switching the high and low levels of the enable end.
For example, in the first state, when the enable terminal is at a high level, the internal timing signal output by the internal timing module is transmitted to the first input terminal as the input of the switch switching chip, and at this time, the switch switching chip outputs the signal input by the first input terminal, that is, the switch switching chip outputs the internal timing signal to the main controller, so that timing is performed on the main controller by using the timing signal of the internal timing module.
In the second state, when the enable terminal is at a low level, the external time signal output by the external time signal module is transmitted to the second input terminal as the input of the switch switching chip, and at this time, the switch switching chip outputs the signal input by the second input terminal, that is, the switch switching chip outputs the external time signal to the main controller, so that the time signal of the external time signal module is used for timing the main controller.
Optionally, the hardware detection circuit includes a signal interface connector, and a metal elastic sheet is disposed on the signal interface connector; under the condition that the metal elastic sheet is not connected with the cable, the metal elastic sheet is suspended in the air, so that the enabling end is in a high level; and under the condition that the external time service module is connected to the metal elastic sheet through a cable, the external time service module is connected into the hardware detection circuit, so that the enabling end is at a low level.
Specifically, the cable may be any type of cable capable of transmitting an external timing signal, for example, a cable of a DB9 model may be connected to the metal elastic sheet, so as to be turned on and connected to the hardware detection circuit, so that the external timing module is connected to the hardware detection circuit and transmits an external timing signal, where the external timing signal may include a serial port signal and a 1pps signal.
Exemplarily, the metal elastic sheet arranged at the position of the signal interface connector is suspended when the metal elastic sheet is not connected with the male and female heads of the transmission line DB9, and the chip enable signal is connected with the main controller GPIO through the pull-up resistor, so that the internal module is used for time service by default, and when the external time service equipment is connected to the metal elastic sheet through a cable, the shell of the external time service equipment connected with the metal elastic sheet is equivalent to grounding, and the switch chip enable pin is pulled down, so that the connection of the internal time service module is disconnected, and the second state is switched.
Optionally, the external time service module includes a posture data acquisition module, and the posture data acquisition module is configured to acquire gyroscope information of a vehicle posture; in the second state, the gyroscope information is transmitted to the main controller through the cable and the switch switching chip.
In an actual application scene, the external time service module generally adopts high-precision time service equipment, the equipment not only contains high-precision time service information, but also can provide positioning information and gyroscope information, the gyroscope information can be provided by the attitude data acquisition module, and the attitude data acquisition module is arranged in the external high-precision time service equipment and is used for acquiring the gyroscope information of the attitude of the vehicle.
For example, in the using process, the external time service module can transmit time service information, positioning information and gyroscope information to the on-board unit in a cable connection mode, and then the on-board unit uploads and processes data.
Therefore, in the second state (external time service mode), the problems that in the practical application, when only internal time service is adopted due to cost limitation, the internal time service module generally does not contain gyroscope information, the attitude information of the vehicle cannot be collected, the precision is limited, and the attitude information cannot be provided can be effectively solved.
Based on the time service device of the V2X vehicle-mounted unit, the compatible internal time service signal and the time service signal of the external equipment of the same group of signal channels are used, and the communication with the external time service equipment is realized without changing an internal software program, so that the internal time service can be realized under the scene needing the internal time service, and meanwhile, the internal time service can be switched to the external time service under the application scene needing the high-precision external time service, the interface resource utilization rate of the vehicle-mounted unit main controller is greatly improved, the access can be conveniently and quickly realized, and the flexibility and the convenience are improved. Meanwhile, signals transmitted by the internal time service module and the external high-precision time service equipment can be compatible in the V2X vehicle-mounted unit board, the switching from internal time service to external time service is realized by detecting the access of the external high-precision time service equipment through hardware, and the form that one hardware circuit board can be adapted to two application scenes is achieved, so that the utilization rate of the V2X vehicle-mounted unit main controller is fully improved, and the process when the external high-precision time service equipment is accessed is facilitated.
The second exemplary embodiment of the disclosure provides a time service method of a V2X vehicle-mounted unit.
FIG. 2 is a flow chart schematically illustrating a timing method of a V2X vehicle-mounted unit according to an embodiment of the disclosure.
The time service method of the V2X vehicle-mounted unit provided by the embodiment of the disclosure comprises the following steps: the time service device of the V2X vehicle-mounted unit is used for carrying out time service on the V2X vehicle-mounted unit, and comprises an internal time service module arranged in the V2X vehicle-mounted unit, a switch switching chip and an external time service module arranged outside the V2X vehicle-mounted unit; when the external time service module is not connected to the V2X vehicle-mounted unit, time service is carried out on the V2X vehicle-mounted unit through the internal time service module; when the external time service module is connected to the V2X onboard unit, time service is performed to the V2X onboard unit through the external time service module.
Referring to fig. 2, the time service method of the V2X onboard unit includes operations S401, S402, S403a, and S403 b:
in operation S401, a time service is provided to the V2X in-vehicle unit by the time service device of the V2X in-vehicle unit, which includes an internal time service module provided in the in-vehicle unit, a switch switching chip, and an external time service module provided outside the in-vehicle unit;
in operation S402, it is determined whether an external time service module is connected to the in-vehicle unit, and if so, operation S403a is executed, in which time is provided to the in-vehicle unit by the external time service module when the external time service module is connected to the in-vehicle unit; if not, operation S403b is executed, in which the internal timing module provides timing to the on-board unit when the external timing module is not connected to the on-board unit.
Based on the time service method of the V2X vehicle-mounted unit, the compatibility of an internal time service signal and a time service signal of an external device by using the same group of signal channels is realized, and an internal software program does not need to be changed to communicate with the external time service device, so that the internal time service can be realized in a scene needing the internal time service, and the internal time service can be switched to the external time service in an application scene needing high-precision external time service, the interface resource utilization rate of the vehicle-mounted unit main controller is greatly improved, the access can be conveniently and quickly realized, the flexibility and the convenience are improved, and the switching between the internal time service mode and the external time service mode under different scene requirements can be realized by detaching and connecting cables.
A third exemplary embodiment of the present disclosure provides a vehicle V2X apparatus including a V2X on-board unit, the V2X on-board unit including the time service device of the V2X on-board unit as described above.
A fourth exemplary embodiment of the present disclosure provides a vehicle including the V2X on-board unit or vehicle V2X device described above.
Based on the time service device and the time service method of the V2X vehicle-mounted unit, the vehicle V2X equipment and the vehicle can realize the compatibility of the same group of signal channels and the switching of an internal time service signal and a time service signal of external equipment, and do not need to change an internal software program to communicate with the external time service equipment, so that the internal time service can be realized in a scene needing the internal time service, and meanwhile, the internal time service can be switched into the external time service in an application scene needing high-precision external time service, the interface resource utilization rate of the vehicle-mounted unit main controller is greatly improved, the access can be conveniently and quickly realized, and the flexibility and the convenience are improved.
The vehicle may be an unmanned vehicle or an autonomous vehicle, etc.
The above description is only for the purpose of describing particular embodiments of the present disclosure, and is intended to enable those skilled in the art to understand or implement the technical concepts of the present disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A time service device of a V2X vehicle-mounted unit, the time service device comprising:
the switch switching chip is arranged in the V2X vehicle-mounted unit, is connected to a main controller of the V2X vehicle-mounted unit, and is used for outputting a time service signal to the main controller;
the internal time service module is arranged in the V2X vehicle-mounted unit, is connected to the switch switching chip and is used for outputting an internal time service signal;
the external time service module is arranged outside the V2X vehicle-mounted unit, is connected to the switch switching chip through a cable and is used for outputting an external time service signal;
when the switch switching chip is switched to a first state, the switch switching chip takes the internal time signal as output, and when the switch switching chip is switched to a second state, the switch switching chip takes the external time signal as output.
2. The time service device of the V2X on-board unit according to claim 1, wherein the switch switching chip includes an enable terminal, and the switch switching chip switches the internal time service signal and the external time service signal as outputs according to a level of the enable terminal;
when the enable terminal is at a high level, the switch switching chip is switched to the first state, and the switch switching chip is used for outputting the internal time service signal to the main controller;
when the enable terminal is at a low level, the switch switching chip is switched to the second state, and the switch switching chip is used for outputting the external time signal to the main controller.
3. The time service apparatus of the V2X on-board unit according to claim 2, further comprising:
the hardware detection circuit is arranged in the V2X vehicle-mounted unit, and a pull-down resistor is arranged between one end of the hardware detection circuit and an enabling end of the switch switching chip;
when the hardware detection circuit detects that the external time service module is connected to the hardware detection circuit, the enabling end is grounded through the pull-down resistor, so that the enabling end is at a low level.
4. The time service device of the V2X vehicle-mounted unit according to claim 3, wherein a pull-up resistor is provided between an enable terminal of the switch switching chip and a general purpose input/output port of the main controller;
when the hardware detection circuit does not detect that the external time service module is connected to the hardware detection circuit, the enabling end is connected to a general input/output port of the main controller through the pull-up resistor, so that the enabling end is at a high level.
5. The time service device of the V2X on-board unit according to claim 4, wherein the switch switching chip includes a first input terminal and a second input terminal, the internal time service module is connected to the first input terminal of the switch switching chip, and the hardware detection circuit is connected to the second input terminal of the switch switching chip;
in the first state, an internal time service signal output by the internal time service module is transmitted to the first input end to be used as the input of the switch switching chip, and the switch switching chip outputs the internal time service signal to the main controller;
in the second state, an external time signal output by the external time signal module is transmitted to the second input end through the cable and the hardware detection circuit to be used as the input of the switch switching chip, and the switch switching chip outputs the external time signal to the main controller.
6. The time service device of the V2X on-board unit according to claim 5, wherein the hardware detection circuit comprises a signal interface connector, and a metal elastic sheet is arranged on the signal interface connector;
under the condition that the metal elastic sheet is not connected with the cable, the metal elastic sheet is suspended in the air, so that the enabling end is in a high level;
and under the condition that the external time service module is connected to the metal elastic sheet through a cable, the external time service module is connected to the hardware detection circuit, so that the enabling end is at a low level.
7. The time service device of the V2X vehicle-mounted unit according to any one of claims 1-6, wherein the external time service module comprises an attitude data acquisition module, and the attitude data acquisition module is used for acquiring gyroscope information of vehicle attitude;
and in the second state, the gyroscope information is transmitted to the main controller through the cable and the switch switching chip.
8. A time service method of a V2X vehicle-mounted unit is characterized by comprising the following steps:
time service is performed on a V2X vehicle-mounted unit through a time service device of the V2X vehicle-mounted unit of any one of claims 1 to 7, wherein the time service device comprises an internal time service module arranged in the V2X vehicle-mounted unit, a switch switching chip and an external time service module arranged outside the V2X vehicle-mounted unit;
when the external time service module is not accessed to the V2X vehicle-mounted unit, the internal time service module is used for carrying out time service on the V2X vehicle-mounted unit; and when the external time service module is connected with the V2X vehicle-mounted unit, time service is carried out on the V2X vehicle-mounted unit through the external time service module.
9. A vehicle V2X arrangement, comprising a V2X on-board unit, the V2X on-board unit comprising the time service arrangement of the V2X on-board unit as claimed in any one of claims 1 to 8.
10. A vehicle comprising the V2X on-board unit of any one of claims 1-8 or the vehicle V2X device of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210044279.8A CN114401501A (en) | 2022-01-14 | 2022-01-14 | Time service device and time service method for vehicle-mounted unit of V2X, vehicle V2X device and vehicle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210044279.8A CN114401501A (en) | 2022-01-14 | 2022-01-14 | Time service device and time service method for vehicle-mounted unit of V2X, vehicle V2X device and vehicle |
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| CN114401501A true CN114401501A (en) | 2022-04-26 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115842599A (en) * | 2022-11-30 | 2023-03-24 | 重庆长安汽车股份有限公司 | Redundant time synchronization method, device, system vehicle and medium for automatic driving |
| CN116133012A (en) * | 2023-04-14 | 2023-05-16 | 智道网联科技(北京)有限公司 | Communication device, test method, system, equipment and storage medium |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115842599A (en) * | 2022-11-30 | 2023-03-24 | 重庆长安汽车股份有限公司 | Redundant time synchronization method, device, system vehicle and medium for automatic driving |
| CN116133012A (en) * | 2023-04-14 | 2023-05-16 | 智道网联科技(北京)有限公司 | Communication device, test method, system, equipment and storage medium |
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