CN109347711B - Vehicle CAN bus multi-network-segment architecture - Google Patents
Vehicle CAN bus multi-network-segment architecture Download PDFInfo
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- CN109347711B CN109347711B CN201811123676.4A CN201811123676A CN109347711B CN 109347711 B CN109347711 B CN 109347711B CN 201811123676 A CN201811123676 A CN 201811123676A CN 109347711 B CN109347711 B CN 109347711B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L12/40006—Architecture of a communication node
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/023—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for transmission of signals between vehicle parts or subsystems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L2012/40208—Bus networks characterized by the use of a particular bus standard
- H04L2012/40215—Controller Area Network CAN
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L2012/40267—Bus for use in transportation systems
- H04L2012/40273—Bus for use in transportation systems the transportation system being a vehicle
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- Engineering & Computer Science (AREA)
- Small-Scale Networks (AREA)
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Abstract
The invention provides a vehicle CAN bus multi-network segment architecture, which comprises a gateway, a CAN bus power network segment, a CAN bus safety network segment, a CAN bus body network segment and a CAN bus diagnosis network segment, wherein the gateway is connected with the CAN bus power network segment; the CAN bus power network segment, the CAN bus safety network segment, the CAN bus body network segment and the CAN bus diagnosis network segment are all connected with the gateway. The invention has the advantages that: the number of nodes in each CAN bus segment and the signal load rate of the CAN bus CAN be reasonably controlled; the functions of the vehicle type can be expanded on the premise of meeting the design requirements.
Description
Technical Field
The invention relates to a network segment architecture, in particular to a vehicle CAN bus multi-network segment architecture.
Background
With the development of technology, vehicles are integrated with more and more functions, and more components on the vehicles are provided, such as electronic fuel injection devices, anti-lock brake devices, airbag devices, etc., and the components on the vehicles are controlled by Electronic Control Units (ECUs), so that more and more Electronic Control Units (ECUs) are provided on the vehicles.
However, in the conventional wiring manner, one end of the electric wire is connected to the switch, and the other end of the electric wire is connected to the electric equipment, so that the number of cables on the automobile is increased sharply, the mass of the cables accounts for about 4% of the mass of the whole automobile, the circuit structure becomes complicated, and the reliability of the automobile is reduced.
In order to solve the problem, the current practice is to use a Controller Area Network (CAN) to perform information interaction between Electronic Control Units (ECUs), but only two network segments are provided, namely a power chassis network segment (PTCAN) and a vehicle body network segment (bdca). However, this method has the following problems: with the continuous increase of the number of Electronic Control Units (ECUs), the bus signal load rate of two network segments can be continuously increased, and signal transmission delay is caused.
Disclosure of Invention
The invention aims to solve the technical problem of providing a vehicle CAN bus multi-network-segment architecture for reasonably controlling the signal load rate of a bus and reducing signal transmission delay.
The invention is realized by the following steps: a vehicle CAN bus multi-network segment architecture comprises a gateway, a CAN bus power network segment, a CAN bus safety network segment, a CAN bus body network segment and a CAN bus diagnosis network segment; the CAN bus power network segment, the CAN bus safety network segment, the CAN bus body network segment and the CAN bus diagnosis network segment are all connected with the gateway.
Furthermore, the gateway is provided with a power network segment interface, a safety network segment interface, a vehicle body network segment interface, a diagnosis network segment interface, a first terminal resistor, a second terminal resistor and a third terminal resistor;
the power network segment interface is connected with one end of the first terminal resistor, and the other end of the first terminal resistor is connected with the CAN bus power network segment; the safety network segment interface is connected with one end of the second terminal resistor, and the other end of the second terminal resistor is connected with the CAN bus safety network segment; the vehicle body network segment interface is connected with the CAN bus vehicle body network segment; the diagnosis network segment interface is connected with one end of the third terminal resistor, and the other end of the third terminal resistor is connected with the CAN bus diagnosis network segment.
Furthermore, the CAN bus power network segment comprises an electronic gear controller, a gearbox controller and an engine controller; and the electronic gear controller, the gearbox controller and the engine controller are all connected with the first terminal resistor.
Furthermore, the engine controller is provided with a fourth terminal resistor, and the engine controller is connected with the first terminal resistor through the fourth terminal resistor.
Furthermore, the CAN bus safety network segment comprises a power steering controller, a body stabilizing controller, a tire pressure detecting controller, a full-automatic parking controller, an advanced auxiliary controller and an airbag controller;
the power-assisted steering controller, the vehicle body stabilizing controller, the tire pressure detecting controller, the full-automatic parking controller, the advanced auxiliary controller and the safety airbag controller are all connected with the second terminal resistor.
Furthermore, the safety airbag controller is provided with a fifth terminal resistor, and the safety airbag controller is connected with the second terminal resistor through the fifth terminal resistor.
Furthermore, the CAN bus vehicle body network segment comprises a vehicle body controller, a look-around system controller, a sound controller, an air conditioner controller, a keyless entry and start system, an electric tail gate controller, a PM2.5 controller, a door and window controller, a steering wheel lock controller, an instrument controller and an LIN network segment;
the vehicle body controller, the look-around system controller, the sound controller, the air conditioner controller, the keyless entry and starting system, the electric tail gate controller, the PM2.5 controller, the door and window controller, the steering wheel lock controller and the instrument controller are all connected with the vehicle body network segment interface;
and the LIN network segment is connected with the vehicle body controller.
Furthermore, the vehicle body controller is provided with a sixth terminal resistor, and the instrument controller is provided with a seventh terminal resistor; the vehicle body controller and the instrument controller are respectively connected through the sixth terminal resistor and the seventh terminal resistor.
Further, the LIN network segment comprises a light margin controller and a combined switch; the light allowance controller and the combined switch are connected with the automobile body controller.
Further, the CAN bus diagnosis network segment comprises a diagnosis port; the diagnosis port is connected with the third terminal resistor.
The invention has the advantages that:
because the CAN bus power network segment, the CAN bus safety network segment, the CAN bus body network segment and the CAN bus diagnosis network segment are arranged, the newly added ECU CAN be reasonably distributed to a relatively idle network segment, the signal load rate of the bus CAN be reasonably controlled, and the signal transmission delay CAN be reduced.
Drawings
The invention will be further described with reference to the following examples with reference to the accompanying drawings.
FIG. 1 is a schematic circuit diagram of a vehicle CAN bus multi-segment architecture according to the present invention.
Description of the drawings:
100-vehicle CAN bus multi-segment architecture, 1-gateway, 11-power segment interface, 12-safety segment interface, 13-vehicle segment interface, 14-diagnosis segment interface, 15-first terminal resistor, 16-second terminal resistor, 17-third terminal resistor, 2-CAN bus power segment, 3-CAN bus safety segment, 4-CAN bus vehicle segment, 5-CAN bus diagnosis segment, 21-electronic gear controller, 22-gearbox controller, 23-engine controller, 231-fourth terminal resistor, 31-power steering controller, 32-vehicle body stabilization controller, 33-tire pressure detection controller, 34-full-automatic parking controller, 35-advanced auxiliary controller, 36-safety airbag controller, 361-a fifth terminal resistor, 41-a vehicle body controller, 42-a panoramic system controller, 43-a sound controller, 44-an air conditioner controller, 45-a keyless entry and start system, 46-a PM2.5 controller, 47-an electric tail gate controller, 48-a steering wheel lock controller, 49-a door and window controller, 410 instrument controller, 411-a sixth terminal resistor, 4101-a seventh terminal resistor, 412-a LIN network segment, 4121-a light allowance controller, 4122-a combination switch and 51-a diagnosis port.
Detailed Description
Referring to fig. 1, the preferred embodiment of a vehicle CAN bus multi-segment architecture 100 of the present invention includes a gateway 1, a CAN bus power segment 2, a CAN bus security segment 3, a CAN bus body segment 4 and a CAN bus diagnosis segment 5; the CAN bus power network segment 2, the CAN bus safety network segment 3, the CAN bus body network segment 4 and the CAN bus diagnosis network segment 5 are all connected with the gateway 1; the CAN bus power network segment 2, the CAN bus safety network segment 3, the CAN bus body network segment 4 and the CAN bus diagnosis network segment 5 are subjected to information interaction through the gateway 1; information interaction between Electronic Control Units (ECU) in each network segment is carried out in each network segment.
The gateway 1 is provided with a power network segment interface 11, a safety network segment interface 12, a vehicle body network segment interface 13, a diagnosis network segment interface 14, a first terminal resistor 15, a second terminal resistor 16 and a third terminal resistor 17; the termination resistors are used for weakening signal reflection in the communication cable and are arranged on two communication ports which are farthest away;
the power network segment interface 11 is connected with one end of the first terminal resistor 15, and the other end of the first terminal resistor 15 is connected with the CAN bus power network segment 2; the secure network segment interface 12 is connected with one end of the second terminal resistor 16, and the other end of the second terminal resistor 16 is connected with the CAN bus secure network segment 3; the vehicle body network segment interface 13 is connected with the CAN bus vehicle body network segment 4; the diagnosis network segment interface 14 is connected with one end of the third terminal resistor 17, and the other end of the third terminal resistor 17 is connected with the CAN bus diagnosis network segment 5.
The CAN bus power network segment 2 comprises an electronic gear controller 21, a gearbox controller 22 and an engine controller 23; the electronic gear controller 21 is used for operating automobile gear shifting, the gearbox controller 22 is used for controlling the rotating speed of a gearbox, and the engine controller 23 is used for controlling the running power of an engine;
the electronic gear controller 21, the gearbox controller 22 and the engine controller 23 are all connected with the first terminal resistor 15; the CAN bus power network section 2 is used for controlling power related modules of the vehicle.
The engine controller 23 is provided with a fourth termination resistor 231, and the engine controller 23 is connected with the first termination resistor 15 through the fourth termination resistor 231.
The CAN bus safety network segment 3 comprises a power steering controller 31, a body stabilizing controller 32, a tire pressure detecting controller 33, a full-automatic parking controller 34, an advanced auxiliary controller 35 and an airbag controller 36;
the power steering controller 31 is used for assisting the vehicle body control when the vehicle turns, the vehicle body stability controller 32 is used for maintaining the stability of the vehicle body, the tire pressure detection controller 33 is used for monitoring the pressure of the automobile tires, the full-automatic parking controller 34 is used for automatic parking, the advanced auxiliary controller 35 is used for some advanced auxiliary functions of the vehicle, and the airbag controller 36 is used for controlling the opening of airbags to protect the safety of a driver;
the power steering controller 31, the vehicle body stabilization controller 32, the tire pressure detecting controller 33, the full-automatic parking controller 34, the advanced auxiliary controller 35 and the airbag controller 36 are all connected with the second terminal resistor 16; the CAN bus safety network segment 3 is used for controlling safety related modules of the vehicle.
The airbag controller 36 is provided with a fifth terminal resistor 361, and the airbag controller 36 is connected with the second terminal resistor 16 through the fifth terminal resistor 361.
The CAN bus body segment 4 comprises a body controller 41, a look-around system controller 42, a sound controller 43, an air conditioner controller 44, a keyless entry and start system 45, an electric tail gate controller 47, a PM2.5 controller 46, a door and window controller 49, a steering wheel parking lock controller 48, an instrument controller 410 and a LIN segment 412;
the vehicle body controller 41 is used for controlling devices such as light, windshield wiper and door lock of a vehicle body, the all-round system controller 42 is used for monitoring the environment around the vehicle body and improving the driving safety, the sound controller 43 is used for controlling the playing content and the volume of sound, the air conditioner controller 44 is used for adjusting the temperature of an air conditioner in the vehicle, the keyless entry and starting system 45 is used for controlling the opening and closing of a vehicle door and the starting of the vehicle, the electric tail door controller 47 is used for controlling the opening of a tail door, the PM2.5 controller 46 is used for monitoring the concentration of PM2.5, the door and window controller 49 is used for controlling the opening and closing of a door and a window, the steering wheel lock controller 48 is used for locking a steering wheel, and the instrument controller 410 is used for controlling the display content of an instrument;
the vehicle body controller 41, the look-around system controller 42, the sound controller 43, the air conditioning controller 44, the keyless entry and start system 45, the electric tail gate controller 47, the PM2.5 controller 46, the door and window controller 49, the steering wheel lock controller 48 and the instrument controller 410 are all connected with the vehicle body segment interface 13; the CAN bus body network segment 4 is used for controlling auxiliary equipment of the vehicle;
the LIN network segment 412 is connected to the vehicle body controller 41; the body controller 41 is simultaneously used as nodes of the CAN bus body segment 4 and the LIN segment 412, and may forward a signal on the LIN segment 412 to the CAN bus body segment 4, or forward a signal of the CAN bus body segment 4 to the LIN segment 412.
The vehicle body controller 41 is provided with a sixth terminal resistor 411, and the meter controller 410 is provided with a seventh terminal resistor 4101; the vehicle body controller 41 and the meter controller 410 are connected by the sixth terminal resistor 411 and the seventh terminal resistor 4101, respectively; two communication ports of the CAN bus body segment 4 which are farthest away are the body controller 41 and the meter controller 410 respectively.
The first termination resistor 15, the second termination resistor 16, the third termination resistor 17, the fourth termination resistor 231, the fifth termination resistor 361, the sixth termination resistor 411 and the seventh termination resistor 4101 all have a resistance of 60 Ω.
The LIN network segment 412 includes a light margin controller 4121 and a combination switch 4122; the light margin controller 4121 and the combination switch 4122 are connected to the vehicle body controller 41.
The CAN bus diagnosis network segment 5 comprises a diagnosis port 51; the diagnostic port 51 is connected to the third terminating resistor 17. Only one node is arranged under the CAN bus diagnosis network segment 5, so that an additional terminal resistor is not needed; when the CAN bus has a fault, the diagnosis equipment diagnoses the CAN bus power network segment 2, the CAN bus safety network segment 3 and the CAN bus body network segment 4 through the diagnosis port 51.
In summary, the invention has the advantages that:
because the CAN bus power network segment, the CAN bus safety network segment, the CAN bus body network segment and the CAN bus diagnosis network segment are arranged, the newly added ECU CAN be reasonably distributed to a relatively idle network segment, the signal load rate of the bus CAN be reasonably controlled, and the signal transmission delay CAN be reduced.
Although specific embodiments of the invention have been described above, it will be understood by those skilled in the art that the specific embodiments described are illustrative only and are not limiting upon the scope of the invention, and that equivalent modifications and variations can be made by those skilled in the art without departing from the spirit of the invention, which is to be limited only by the appended claims.
Claims (7)
1. A vehicle CAN bus multi-network segment architecture is characterized in that: the system comprises a gateway, a CAN bus power network segment, a CAN bus safety network segment, a CAN bus body network segment and a CAN bus diagnosis network segment; the CAN bus power network segment, the CAN bus safety network segment, the CAN bus body network segment and the CAN bus diagnosis network segment are all connected with the gateway;
the gateway is provided with a power network segment interface, a safety network segment interface, a vehicle body network segment interface, a diagnosis network segment interface, a first terminal resistor, a second terminal resistor and a third terminal resistor;
the power network segment interface is connected with one end of the first terminal resistor, and the other end of the first terminal resistor is connected with the CAN bus power network segment; the safety network segment interface is connected with one end of the second terminal resistor, and the other end of the second terminal resistor is connected with the CAN bus safety network segment; the vehicle body network segment interface is connected with the CAN bus vehicle body network segment; the diagnosis network segment interface is connected with one end of the third terminal resistor, and the other end of the third terminal resistor is connected with the CAN bus diagnosis network segment;
the CAN bus power network segment comprises an electronic gear controller, a gearbox controller and an engine controller; the electronic gear controller, the gearbox controller and the engine controller are all connected with the first terminal resistor;
the CAN bus safety network segment comprises a power steering controller, a vehicle body stabilizing controller, a tire pressure detecting controller, a full-automatic parking controller, an advanced auxiliary controller and an airbag controller;
the power-assisted steering controller, the vehicle body stabilizing controller, the tire pressure detecting controller, the full-automatic parking controller, the advanced auxiliary controller and the safety airbag controller are all connected with the second terminal resistor.
2. The vehicle CAN bus multi-segment architecture of claim 1, wherein: the engine controller is provided with a fourth terminal resistor, and the engine controller is connected with the first terminal resistor through the fourth terminal resistor.
3. The vehicle CAN bus multi-segment architecture of claim 1, wherein: the safety airbag controller is provided with a fifth terminal resistor and is connected with the second terminal resistor through the fifth terminal resistor.
4. The vehicle CAN bus multi-segment architecture of claim 1, wherein: the CAN bus vehicle body network segment comprises a vehicle body controller, a look-around system controller, a sound controller, an air conditioner controller, a keyless entry and starting system, an electric tail gate controller, a PM2.5 controller, a door and window controller, a steering wheel lock controller, an instrument controller and an LIN network segment;
the vehicle body controller, the look-around system controller, the sound controller, the air conditioner controller, the keyless entry and starting system, the electric tail gate controller, the PM2.5 controller, the door and window controller, the steering wheel lock controller and the instrument controller are all connected with the vehicle body network segment interface;
and the LIN network segment is connected with the vehicle body controller.
5. The vehicle CAN bus multi-segment architecture of claim 4, wherein: the vehicle body controller is provided with a sixth terminal resistor, and the instrument controller is provided with a seventh terminal resistor; the vehicle body controller and the instrument controller are respectively connected through the sixth terminal resistor and the seventh terminal resistor.
6. The vehicle CAN bus multi-segment architecture of claim 4, wherein: the LIN network segment comprises a light margin controller and a combined switch; the light allowance controller and the combined switch are connected with the automobile body controller.
7. The vehicle CAN bus multi-segment architecture of claim 1, wherein: the CAN bus diagnosis network segment comprises a diagnosis port; the diagnosis port is connected with the third terminal resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811123676.4A CN109347711B (en) | 2018-09-26 | 2018-09-26 | Vehicle CAN bus multi-network-segment architecture |
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| CN201811123676.4A CN109347711B (en) | 2018-09-26 | 2018-09-26 | Vehicle CAN bus multi-network-segment architecture |
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| CN109347711A CN109347711A (en) | 2019-02-15 |
| CN109347711B true CN109347711B (en) | 2021-01-26 |
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| CN110808894B (en) * | 2019-11-05 | 2021-08-31 | 东软睿驰汽车技术（沈阳）有限公司 | Data transmission method and device based on CAN bus |
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| CN109347711A (en) | 2019-02-15 |
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