CN109995631B - Vehicle-mounted control system and method with domain control function - Google Patents
Vehicle-mounted control system and method with domain control function Download PDFInfo
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Abstract
A vehicle-mounted control system with a domain control function and an upgrading method relate to the technical field of automobile electronics and comprise the following steps: a central domain controller; the display equipment is connected with the central domain controller through the LVDS interface; the vehicle-mounted electronic module is connected with the central domain controller through the Ethernet; and the gateway is connected with the central domain controller through the CAN interface and the Ethernet, wherein the input signal processing unit receives and processes signals of the gateway and the vehicle-mounted electronic module, and then the signals are sent to the corresponding display equipment for displaying through the LVDS interface and sent to the vehicle-mounted electronic module for execution through the Ethernet communication interface by the output driving circuit unit. Because the central domain controller is introduced to centralize the vehicle-mounted electronic modules, the display equipment and the like which can use the same interface and communication protocol, the interface and the communication protocol are degenerated, the interdependence between the wire harness and the parts is reduced, the vehicle-mounted control system of the automobile is safer, and the flexibility of the system is improved.
Description
Technical Field
The invention relates to the technical field of automotive electronics, in particular to a vehicle-mounted control system with a domain control function.
Background
With the development of automotive electronics, more and more electrical parts are used on automobiles, and different parts need to interact to realize one function.
Specifically, the central controller may be connected to various display devices (e.g., an instrument display screen and a central control display screen) for displaying, and may be connected to various peripheral vehicle-mounted electronic modules (e.g., a panoramic camera, a V2X module, and a vehicle data recorder) for collecting external information for processing and controlling. Furthermore, a gateway for remote communication is introduced to carry out communication, and various resources are integrated to form the intelligent automobile.
Obviously, when the above various peripheral devices (display devices, vehicle-mounted electronic modules, gateways, etc.) are installed on the entire automobile, since the interfaces and communication protocols of the respective devices are not consistent, and some devices need to be connected by using separate connection harnesses, these devices may cause the electronic components of the automobile to become complicated and redundant, and occupy too much space.
Chinese patent application CN201610585369.2 discloses a communication system and method for a combination meter and a vehicle-mounted infotainment system, which realizes communication between the combination meter and the vehicle-mounted infotainment system, but still needs to set multiple interfaces to realize connection and communication with the existing devices.
Disclosure of Invention
The invention aims to solve the problem that the central controller of the automobile needs to be provided with various interfaces to realize communication with the conventional vehicle-mounted electronic equipment.
The present invention provides a vehicle-mounted control system having a domain control function, comprising:
the central domain controller is provided with a central processing unit, an input signal processing unit, an output driving circuit unit, an LVDS interface, a CAN interface and an Ethernet communication interface;
the display equipment is connected with the central domain controller through the LVDS interface;
the vehicle-mounted electronic module is connected with the central domain controller through Ethernet; and
the gateway is connected with the central domain controller through the CAN interface and the Ethernet,
the input signal processing unit receives and processes signals of the gateway and the vehicle-mounted electronic module, and then the output driving circuit unit sends the signals to corresponding display equipment for displaying through an LVDS interface and sends the signals to the vehicle-mounted electronic module for execution through an Ethernet communication interface.
The in-vehicle control system with the domain control function provided by the invention can also have the following characteristics:
wherein the display equipment comprises any one or more of a combined instrument display screen, a central control display screen and a HUD display screen,
and the central domain controller receives the signal forwarded by the gateway through the CAN interface, and the signal is processed by the input signal processing unit and the output driving circuit unit and then sent to the combined instrument display screen, the central control display screen and the HUD display screen through the LVDS interface for display.
The in-vehicle control system with the domain control function provided by the invention can also have the following characteristics:
wherein the vehicle-mounted electronic module is any one or more of a panoramic camera, a V2X module, a vehicle event data recorder, a night vision device and a T-box,
the central domain controller receives signals acquired by the vehicle-mounted electronic module through Ethernet, and the signals are processed by the input signal processing unit and the output driving circuit unit and then are sent to the corresponding display equipment through an LVDS interface for display.
The vehicle-mounted control system with the domain control function provided by the invention can also have the following characteristics that:
a power amplifier and at least one ECU,
wherein the power amplifier is connected with an output driving circuit unit of the central domain controller through the CAN interface,
and the ECU is connected with the power amplifier through a CAN bus.
The in-vehicle control system with the domain control function provided by the invention can also have the following characteristics:
wherein the ECU comprises any one or more of an anti-lock braking system ECU, a four-wheel drive system ECU, an electric control automatic transmission ECU, an active suspension system ECU, an air bag system ECU and a multidirectional adjustable electric control seat ECU,
and all the ECUs are connected through a CAN bus and are jointly controlled by the central domain controller.
The vehicle-mounted control system with the domain control function provided by the invention can also have the following characteristics that:
the ADAS domain controller is connected to the ADAS domain controller,
is connected with the central domain controller through Ethernet,
and after receiving the external environment information received by the vehicle-mounted electronic module, the central domain controller transmits the information to the ADAS domain controller through Ethernet to assist driving.
The vehicle-mounted control system with the domain control function provided by the invention can also have the following characteristics that:
a diagnostic interface connected to the gateway via Ethernet,
and when the diagnosis is carried out, the diagnosis interface is connected with the central domain controller for diagnosis.
The invention also provides an upgrading method of the vehicle-mounted control system with the domain control function, which is characterized by comprising the following steps:
downloading an upgrade file from a corresponding upgrade server through the gateway;
the upgrading file is transmitted to the central domain controller through an Ethernet bus;
storing the upgrade file;
the central processing unit detects whether the environment meets an upgradable condition;
and when the upgradable condition is met, the central processing unit sends an instruction to upgrade.
The upgrading method provided by the invention is characterized in that:
when the ECU receives the upgrading instruction, a signal is sent to the central domain controller, and the ECU upgrading file is downloaded by the central domain controller in an OTA mode.
The upgrading method provided by the invention is characterized in that:
and the T-box downloads the ECU upgrade file through the gateway, and transmits the upgrade file to the central domain controller through an Ethernet bus between the T-box and the central domain controller.
Action and Effect of the invention
According to the vehicle-mounted control system with the domain control function, the central domain controller (the vehicle body domain controller of the vehicle) is introduced, and the functional groups (the vehicle-mounted electronic module, the display equipment and the like) which can use the same interface and communication protocol are centralized, so that the interface and the communication protocol are degenerated, namely, the interfaces of various peripheral equipment are integrated into one vehicle body domain controller, the interfaces are reduced, the wiring harness is reduced, the interdependency among components is reduced, the vehicle-mounted control system of the vehicle is safer, meanwhile, the peripheral equipment is more convenient to increase or decrease, and the flexibility of the system is improved.
Drawings
FIG. 1 is an in-vehicle control system with a domain control function in an embodiment of the present invention;
fig. 2 is a schematic diagram of steps of an upgrading method in an embodiment of the present invention.
Detailed Description
In order to make the technical means, the creation features, the achievement purposes and the efficacy of the present invention easy to understand, the following embodiments specifically describe the vehicle-mounted control system with the domain control function and the upgrading method of the present invention with reference to the accompanying drawings.
Explanation of the abbreviations of the foreign language
LVDS, Low-Voltage Differential Signaling. A signaling mode proposed by national semiconductor company in 1994 is a level standard, and an LVDS interface, also called RS-644 bus interface, is a data transmission and interface technology that appeared in 90 s of the 20 th century.
The CAN interface, a short name for Controller Area Network, was developed by the German BOSCH company known as research and development of automotive electronics, and finally became the international standard (ISO 11898), one of the most widely used field buses internationally. In north america and western europe, the CAN bus protocol has become the standard bus for automotive computer control systems and embedded industrial control area networks, and possesses the J1939 protocol designed for large trucks and heavy work machinery vehicles with CAN as the underlying protocol.
Ethernet, is a computer local area network technology. The IEEE 802.3 standard of the IEEE organization sets forth a technical standard for ethernet, which specifies the contents of the wiring, electrical signals, and medium access layer protocols, including the physical layer. Ethernet is currently the most commonly used local area network technology
HUD Display screen, Head Up Display, HUD for short, is the flight auxiliary instrument of application on the aircraft at first. By "heads-up" is meant that the pilot is able to see the important information he needs without lowering his head. Head-up displays were first presented on military aircraft to reduce the frequency with which pilots need to look down at the instruments, avoiding interruptions in attention and loss of Awareness of the state (status Awareness). Because of the convenience of the HUD and the capability of improving flight safety, civil aircrafts and automobiles are also installed in succession.
V2X, meaning vehicle to evolution, i.e. the exchange of information from vehicle to outside. The Internet of vehicles establishes a new automobile technology development direction by integrating a Global Positioning System (GPS) navigation technology, an automobile-to-automobile communication technology, a wireless communication technology and a remote sensing technology, and realizes the compatibility of manual driving and automatic driving.
The vehicle networking system comprises four parts, namely a host, the vehicle T-BOX, a mobile phone APP and a background system. The host is mainly used for video and audio entertainment and vehicle information display; the vehicle-mounted T-BOX is mainly used for communicating with a background system/mobile phone APP, and vehicle information display and control of the mobile phone APP are achieved.
An ECU, an Electronic Control Unit, also called a "traveling computer" or a "vehicle-mounted computer", is an Electronic Control Unit. The controller is a special microcomputer controller for the automobile in terms of application.
The ADAS and Advanced Driving assistance System sense the surrounding environment at any time during the Driving process of the automobile by using various sensors mounted on the automobile, collect data, identify, detect and track static and dynamic objects, and perform systematic operation and analysis by combining with navigator map data, thereby enabling drivers to detect the possible danger in advance and effectively increasing the comfort and safety of automobile Driving.
OTA, Over-the-Air Technology Over-the-Air download Technology, is a Technology for remotely managing SIM card data and applications Over the Air interface of mobile communications (GSM or CDMA). The air interface may employ WAP, GPRS, CDMA1X and short message technology. The use of OTA technology enables mobile communications to provide not only voice and data services, but also new service downloads.
Fig. 1 is an on-vehicle control system having a domain control function in an embodiment of the present invention.
Example 1
As shown in fig. 1, the in-vehicle control system having a domain control function includes a central domain controller 100, a display device 200, an in-vehicle electronic module 300, and a gateway 400.
The central domain controller 100 includes a central processing unit 101, an input signal processing unit 102, an output driver circuit unit 103, an LVDS interface 104, a CAN interface 105, and an Ethernet communication interface 106. Specifically, the central domain controller 100 in the present embodiment may employ an existing commercially available body domain controller.
And the display device 200 is connected with the central domain controller through the LVDS interface.
And an in-vehicle electronic module 300 connected to the central domain controller through Ethernet.
A gateway 400 connected to the central domain controller through the CAN interface and the Ethernet,
the input signal processing unit receives and processes signals of the gateway and the vehicle-mounted electronic module, and then the output driving circuit unit sends the signals to corresponding display equipment for displaying through an LVDS interface and sends the signals to the vehicle-mounted electronic module for execution through an Ethernet communication interface.
Example 2
On the basis of embodiment 1, further, the display device in this embodiment includes three types, that is, a combination meter display screen, a central control display screen, and a HUD display screen, and may optionally be expanded by a user, and any display device that uses an LVDS interface may be accessed.
And the central domain controller receives the signal forwarded by the gateway through the CAN interface, and the signal is processed by the input signal processing unit and the output driving circuit unit and then sent to the combined instrument display screen, the central control display screen and the HUD display screen through the LVDS interface for display.
Example 3
On the basis of the embodiment 1 or 2, further, in the embodiment that the vehicle-mounted electronic module is a look-around camera, a V2X module, a car recorder, a night vision device and a T-box,
the central domain controller receives the signal acquired by the vehicle-mounted electronic module 300 through Ethernet, and the signal is processed by the input signal processing unit and the output driving circuit unit and then sent to the corresponding display device through the LVDS interface for displaying.
Example 4
On the basis of embodiment 1, 2 or 3, further, the vehicle-mounted control system provided by this embodiment further includes: a power amplifier and at least one ECU,
the power amplifier is connected with an output driving circuit unit of the central domain controller through the CAN interface, and the ECU is connected with the power amplifier through a CAN bus.
The power amplifier uses the existing market-sold finished power amplifier.
Example 5
Further, on the basis of embodiment 3, the ECU includes any one or more of an anti-lock brake system ECU, a four-wheel drive system ECU, an electronically controlled automatic transmission ECU, an active suspension system ECU, an airbag system ECU, and a multi-direction adjustable electronically controlled seat ECU,
and all the ECUs are connected through a CAN bus and are jointly controlled by the central domain controller.
Example 6
On the basis of embodiment 1, 2, 3, 4, or 5, further, the vehicle-mounted control system provided in this embodiment further includes: and the ADAS domain controller is connected with the central domain controller through the Ethernet, and after the central domain controller receives the external environment information received by the vehicle-mounted electronic module, the information is transmitted to the ADAS domain controller through the Ethernet to assist driving.
Example 7
On the basis of embodiment 1, 2, 3, 4, 5, or 6, further, the vehicle-mounted control system provided by this embodiment further includes: a diagnostic interface connected to the gateway via Ethernet,
and when the diagnosis is carried out, the diagnosis interface is connected with the central domain controller for diagnosis.
Specifically, the diagnosis interface uses an OBD II type (abbreviation of II type vehicle-mounted diagnosis system) 16-pin socket interface, and diagnosis can be carried out only by using a special diagnosis instrument to access the interface.
The operation and principle of the on-board control system with the domain control function provided in the embodiment will be briefly described below.
1. The central domain controller is connected with the gateway through a CAN bus and an Ethernet bus. The central domain controller carries out information interaction with the ECU of other domains/network segments of the whole vehicle through a CAN bus; when the external device writes the software to the infotainment domain controller, the software is transmitted to the gateway through the Ethernet bus between the diagnosis interface and the gateway, and then the gateway transmits the software to the infotainment domain controller through the Ethernet bus.
2. The panoramic camera transmits the acquired image information to the central domain controller through an Ethernet bus; the central domain controller uses the information for self control operation on one hand, and transmits the information to the ADAS domain controller through an Ethernet bus on the other hand;
V2X transmits the collected image/video information to the central domain controller through Ethernet bus;
4. the automobile data recorder transmits the acquired image/video information to the central domain controller through an Ethernet bus;
5. the night vision device transmits the acquired image information to the central domain controller through an Ethernet bus; and the central domain controller processes the information and then displays the information on a combined instrument screen or a central control display screen or a HUD screen, or warns or reminds a driver.
The T-box receives the image and video information collected by other modules transmitted by the central domain controller through an Ethernet bus; receiving other information of the vehicle through the CAN bus; the T-box sends the information to the background server through the self-contained 4G/5G module;
7. the central area controller is connected with other CAN bus controllers in the information entertainment domain through a CAN bus to complete information interaction.
FIG. 2 is a schematic diagram illustrating steps of an upgrade method according to an embodiment of the present invention
Example 8
As shown in fig. 2, the present embodiment provides an upgrading method for a vehicle-mounted control system having a domain control function, which is characterized by including the following steps:
and step S1, downloading the upgrade files from the corresponding upgrade server through the gateway. When the ECU receives the upgrading instruction, a signal is sent to the central domain controller, and the ECU upgrading file is downloaded by the central domain controller in an OTA mode.
And the T-box downloads the ECU upgrade file through the gateway, and transmits the upgrade file to the central domain controller through an Ethernet bus between the T-box and the central domain controller.
And step S2, transparently transmitting the upgrade file to the central domain controller through the Ethernet bus.
And step S3, storing the upgrade file.
In step S4, the central processing unit detects whether the environment satisfies the upgradable condition.
Step S5, when the upgradable condition is satisfied, the central processing unit issues an instruction to upgrade. The upgrade is performed when the user inputs approval to the upgrade or under the condition that all the ECU devices do not operate (i.e., are in an idle stop state).
Effects and effects of the embodiments
According to the vehicle-mounted control system with the domain control function, the central domain controller (the vehicle body domain controller of the vehicle) is introduced, and the functional groups (the vehicle-mounted electronic module, the display device and the like) capable of using the same interface and communication protocol are centralized, so that the interface and the communication protocol are degenerated, namely, the interfaces of various peripheral devices are integrated into one vehicle body domain controller, the interfaces are reduced, the wiring harness is reduced, the interdependence among components is reduced, the vehicle-mounted control system of the vehicle is safer, meanwhile, the increase or reduction of the peripheral devices is more convenient, and the flexibility of the system is improved.
Obviously, the vehicle-mounted control system with the domain control function provided by the embodiment has the following functions:
1) the logical operation function of the display information of the combination meter is as follows: receiving signals of other domains forwarded by the gateway through the CAN bus, performing comprehensive processing, and outputting the signals to a display screen of the combination instrument for displaying through LVDS;
2) the system has the logical operation function of the traditional video entertainment host, and transmits operation and processing results to a central control display screen through LVDS for displaying;
3) the HUD has a logic operation function of the HUD, and the operation and processing result is transmitted to a HUD display screen through LVDS for displaying;
4) has the control/processing functions of a panoramic system and night vision;
5) the system has the Switch function of a vehicle-mounted Ethernet, and can transmit signals of a V2X module, a T-box, a look-around camera, night vision and the like to an ADAS domain controller through an Ethernet bus;
6) the gateway has the network security protection function, and can complete the second-level network security protection of network security through the gateway.
7) The OTA software upgrading function is provided.
The present invention is not limited to the above-described embodiments, and it will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and such modifications and improvements are also considered to be within the scope of the present invention. Those not described in detail in this specification are within the skill of the art.
Claims (7)
1. An upgrade method of an in-vehicle control system having a domain control function, the in-vehicle control system having the domain control function comprising:
the central domain controller is provided with a central processing unit, an input signal processing unit, an output driving circuit unit, an LVDS interface, a CAN interface and an Ethernet communication interface;
the at least two kinds of display equipment are connected with the central domain controller through the LVDS interface;
the at least two vehicle-mounted electronic modules are connected with the central domain controller through the Ethernet communication interface;
the power amplifier and the at least two ECUs are connected with the central domain controller through the CAN interface;
the input signal processing unit receives and processes signals of the gateway and the vehicle-mounted electronic module which are sent by the Ethernet communication interface, and then the output driving circuit unit sends the signals to corresponding display equipment for displaying through the LVDS interface and sends the signals to the vehicle-mounted electronic module through the Ethernet communication interface for execution;
the upgrading method is characterized by comprising the following steps:
downloading an upgrade file from a corresponding upgrade server through the gateway;
the upgrading file is transmitted to the central domain controller through an Ethernet bus;
storing the upgrade file;
the central processing unit detects whether the environment meets an upgradable condition;
when the upgradable condition is met, the central processing unit sends an instruction to upgrade;
when the ECU receives an upgrading instruction, a signal is sent to the central domain controller, and an ECU upgrading file is downloaded by the central domain controller in an OTA mode;
and the T-box downloads the ECU upgrade file through the gateway, and transmits the upgrade file to the central domain controller through an Ethernet bus between the T-box and the central domain controller.
2. The method for upgrading the in-vehicle control system having the domain control function according to claim 1, characterized in that:
wherein the display equipment comprises any one or more of a combined instrument display screen, a central control display screen and a HUD display screen,
and the central domain controller receives the signal forwarded by the gateway through the CAN interface, and the signal is processed by the input signal processing unit and the output driving circuit unit and then sent to the combined instrument display screen, the central control display screen and the HUD display screen through the LVDS interface for display.
3. The method for upgrading the in-vehicle control system having the domain control function according to claim 1, characterized in that:
wherein the vehicle-mounted electronic module is any one or more of a panoramic camera, a V2X module, a vehicle event data recorder, a night vision device and a T-box,
the central domain controller receives signals acquired by the vehicle-mounted electronic module through Ethernet, and the signals are processed by the input signal processing unit and the output driving circuit unit and then are sent to the corresponding display equipment through an LVDS interface for display.
4. The method for upgrading an in-vehicle control system having a domain control function according to claim 1,
the power amplifier is connected with an output driving circuit unit of the central domain controller through the CAN interface,
and the ECU is connected with the power amplifier through a CAN bus.
5. The method for upgrading the in-vehicle control system having the domain control function according to claim 4, characterized in that:
wherein the ECU comprises any one or more of an anti-lock braking system ECU, a four-wheel drive system ECU, an electric control automatic transmission ECU, an active suspension system ECU, an air bag system ECU and a multidirectional adjustable electric control seat ECU,
and all the ECUs are connected through a CAN bus and are jointly controlled by the central domain controller.
6. The method for upgrading the in-vehicle control system having the domain control function according to claim 1, further comprising:
the ADAS domain controller is connected to the ADAS domain controller,
is connected with the central domain controller through Ethernet,
and after receiving the external environment information received by the vehicle-mounted electronic module, the central domain controller transmits the information to the ADAS domain controller through Ethernet to assist driving.
7. The method for upgrading the in-vehicle control system having the domain control function according to claim 1, further comprising:
a diagnostic interface connected to the gateway via Ethernet,
and when the diagnosis is carried out, the diagnosis interface is connected with the central domain controller for diagnosis.
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| CN201910218864.3A CN109995631B (en) | 2019-03-21 | 2019-03-21 | Vehicle-mounted control system and method with domain control function |
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