CN211319064U - Vehicle bus communication equipment and vehicle bus test system - Google Patents
Vehicle bus communication equipment and vehicle bus test system Download PDFInfo
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- CN211319064U CN211319064U CN202020379242.7U CN202020379242U CN211319064U CN 211319064 U CN211319064 U CN 211319064U CN 202020379242 U CN202020379242 U CN 202020379242U CN 211319064 U CN211319064 U CN 211319064U
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Abstract
The utility model provides a vehicle bus communication equipment, including main control unit and ethernet switch chip. The main controller comprises a first communication interface and a second communication interface, and the first communication interface is connected with a vehicle bus. The Ethernet switch chip comprises a third communication interface, a fourth communication interface and a fifth communication interface, wherein the third communication interface is connected with the second communication interface of the main controller, and the fourth communication interface and the fifth communication interface are communicated with the main controller through the third communication interface. The second communication interface, the third communication interface, the fourth communication interface and the fifth communication interface are ethernet interfaces.
Description
Technical Field
The utility model relates to a vehicle communication field especially relates to a vehicle bus communication equipment and a vehicle bus test system.
Background
An Electronic Control Unit (ECU) of a vehicle is one of the core elements of modern automotive electronics. An automobile typically has a plurality of vehicle electronic controllers, each of which manages a different function, and between which information can be exchanged. With the improvement of the automation level of automobiles, the control range of an electronic controller of the automobile is gradually expanded, and the circuit is more and more complex. In order to simplify the circuitry and reduce the costs, nowadays, a plurality of vehicle electronic controllers of the entire vehicle form a network system via a vehicle bus. The vehicle bus communication equipment is used for communication between a computer and a vehicle electronic controller on a vehicle bus, and is commonly used in occasions of bus test, offline refreshing, functional test and the like of the vehicle electronic controller.
Fig. 1 is a schematic diagram illustrating a conventional communication manner between an electronic controller and a computer of a vehicle. As shown in fig. 1, the vehicle bus communication device 10 includes an interface 101 and an interface 102, and the computer 11 includes a plurality of interfaces 111. The interface 101 of the vehicle bus communication device 10 is connected to the interface 111 of the computer 11 by wire, and the types of the interface 101 and the interface 111 may be both USB or ethernet interfaces. The interface 102 is connected to the vehicle bus 12, the type of the interface 102 being adapted to the vehicle bus 12. The vehicle bus 12 is connected to a plurality of vehicle electronic controllers 13, thereby enabling communication between the computer 11 and the plurality of vehicle electronic controllers 13.
In the conventional communication mode between the vehicle electronic controller and the computer, because each vehicle bus communication device 10 needs to occupy one USB or ethernet interface 111 of the computer 11, when one computer 11 needs to be connected with multiple vehicle bus communication devices 10 in an extended manner, the number of the extended vehicle bus communication devices 10 is limited by the number of the interfaces 111 of the computer 11, which results in the defects of more occupied interfaces and poor extension capability of the vehicle bus communication devices.
Disclosure of Invention
The utility model discloses to above-mentioned prior art's defect, provide a vehicle bus communication equipment, solved the poor defect of current vehicle bus communication equipment expanded capability.
The utility model provides a vehicle bus communication equipment, including main control unit and ethernet switch chip. The main controller comprises a first communication interface and a second communication interface, and the first communication interface is connected with a vehicle bus. The Ethernet switch chip comprises a third communication interface, a fourth communication interface and a fifth communication interface, wherein the third communication interface is connected with the second communication interface of the main controller, and the fourth communication interface and the fifth communication interface are communicated with the main controller through the third communication interface. The second communication interface, the third communication interface, the fourth communication interface and the fifth communication interface are ethernet interfaces.
In an embodiment of the present invention, the number of ethernet interfaces included in the ethernet switch chip is greater than or equal to 3.
In an embodiment of the present invention, the vehicle bus is a combination of one or more of CAN, CANFD, LIN, on-board ethernet, Flexray.
In an embodiment of the invention, the first communication interface is adapted to connect to a vehicle electronic controller via the vehicle bus.
In an embodiment of the present invention, the main controller further includes a transceiver circuit of the vehicle bus.
The utility model also provides a vehicle bus test system, including a plurality of vehicle electronic controller, a plurality of vehicle bus, computer and a plurality of vehicle bus communication equipment. The plurality of vehicle buses are respectively connected with the plurality of vehicle electronic controllers correspondingly. A computer is in communication with the vehicle electronic controller. The vehicle bus communication devices are connected with each other in a cascade mode, wherein the first-level vehicle bus communication device is connected with the computer, each vehicle bus communication device is connected with a corresponding vehicle bus, and each vehicle bus communication device comprises a main controller and an Ethernet switch chip. The main controller comprises a first communication interface and a second communication interface, and the first communication interface is connected with a vehicle bus. The Ethernet switch chip comprises a third communication interface, a fourth communication interface and a fifth communication interface, wherein the third communication interface is connected with the second communication interface of the main controller, and the fourth communication interface and the fifth communication interface are communicated with the main controller through the third communication interface. The second communication interface, the third communication interface, the fourth communication interface and the fifth communication interface are ethernet interfaces.
In an embodiment of the present invention, the plurality of vehicle bus communication devices are connected to each other through an ethernet interface.
In an embodiment of the present invention, the number of ethernet interfaces included in the ethernet switch chip is greater than or equal to 3.
In an embodiment of the present invention, the vehicle bus is a combination of one or more of CAN, CANFD, LIN, on-board ethernet, Flexray; the main controller is an MCU, an SoC or an FPGA.
In an embodiment of the invention, the first communication interface is adapted to connect a vehicle electronic controller through the vehicle bus, and the main controller further comprises a transceiver circuit of the vehicle bus.
The utility model provides a vehicle bus communication equipment is through at its inside integrated ethernet switch chip to realized when the computer needs the vehicle electronic controller communication with large quantity, vehicle bus communication equipment as communication media can be through cascading a plurality of vehicle bus communication equipment of mode extension connection of ethernet. In addition, in the cascade connection of the multi-vehicle bus communication equipment, USB Hub and some additional network switch equipment are not needed, and cascade connection can be realized between the vehicle bus communication equipment only by one Ethernet line, so that the expansion capability of the vehicle bus communication equipment is improved, the expansion cost of the vehicle bus communication equipment is reduced, and the cascade connection device has the advantages of strong expansion capability, simple circuit and cost saving.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. In the drawings:
fig. 1 is a schematic diagram of a conventional communication method between a vehicle ECU and a computer.
Fig. 2 is a schematic structural diagram of a vehicle bus communication device according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of a cascade structure of a vehicle bus communication device according to an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a vehicle bus testing system according to another embodiment of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described herein, and thus the present invention is not limited by the specific embodiments disclosed below.
As used in the present application and in the claims, the terms "a," "an," "the," and/or "the" are not intended to be exhaustive or to include the plural as well, unless the context clearly indicates otherwise. In general, the terms "comprises" and "comprising" merely indicate that steps and elements are included which are explicitly identified, that the steps and elements do not form an exclusive list, and that a method or apparatus may include other steps or elements.
In the context of the present invention, a structure described as "on" a first feature or "on" a second feature may include embodiments where the first and second features are formed in direct contact, and may also include embodiments where additional features are formed between the first and second features, such that the first and second features may not be in direct contact.
It will be understood that when an element is referred to as being "on," "connected to," "coupled to" or "contacting" another element, it can be directly on, connected or coupled to, or contacting the other element or intervening elements may be present. In contrast, when an element is referred to as being "directly on," "directly connected to," "directly coupled to" or "directly contacting" another element, there are no intervening elements present. Similarly, when a first component is said to be "in electrical contact with" or "electrically coupled to" a second component, there is an electrical path between the first component and the second component that allows current to flow. The electrical path may include capacitors, coupled inductors, and/or other components that allow current to flow even without direct contact between the conductive components.
Fig. 2 is a schematic structural diagram of a vehicle bus communication device according to an embodiment of the present invention. As shown in fig. 2, the vehicle bus communication device 24 may include a main controller 241 and an ethernet switch chip 242, and the main controller 241 and the ethernet switch chip 242 may be interconnected through ethernet interfaces 2412, 2421.
An ethernet switch chip refers to a type of chip with ethernet two-layer switching capability, which may be KSZ8794 from Microchip corporation. In some other embodiments, the ethernet switch chip 242 may be other models of chips having the same functionality.
The ethernet switch chip 242 may include a third communication interface 2421, a fourth communication interface 2422, and a fifth communication interface 2423, where the third communication interface 2421, the fourth communication interface 2422, and the fifth communication interface 2423 are ethernet interfaces, and the number of the ethernet interfaces included in the ethernet switch chip 242 is greater than or equal to 3.
The third communication interface 2421 of the ethernet switch chip 242 may be connected to the second communication interface 2412 of the host controller 241, and the fourth communication interface 2422 and the fifth communication interface 2423 communicate with the host controller 241 through the third communication interface 2421. The fourth communication interface 2422 and the fifth communication interface 2423 may be externally connected to a computer 23 or cascade-connected to the same vehicle bus communication device 24, thereby implementing multi-device cascade expansion of the vehicle bus communication device 24. The rate of the fourth communication interface 2422 and the fifth communication interface 2423 can be 100Mbps or 1000Mbps, depending on the particular application of the vehicle bus communication device 24.
Fig. 3 is a schematic diagram of a cascade structure of a vehicle bus communication device according to an embodiment of the present invention. As shown in fig. 3, the cascade structure 20 of the vehicle bus communication devices includes a plurality of vehicle bus communication devices 24 and a computer 23. The plurality of vehicle bus communication devices 24 are connected to each other in a cascade manner.
The first-level vehicle bus communication device 24 may be connected to the computer 23, and each vehicle bus communication device 24 is connected to a corresponding external device through the first communication interface 2411 (not shown in fig. 3, see fig. 2) of the main controller 241.
The ethernet switch chip 242 provides ethernet switching capability of at least three interfaces, wherein one interface of the ethernet switch chip 242 is connected to the main controller 241 (not shown in fig. 3, see fig. 2), and at least two other ethernet interfaces may be connected to the external computer 23 or cascade the same vehicle bus communication device 24, thereby implementing a multi-device cascade extension of the vehicle bus communication device 24. The rate of the ethernet interface for implementing the cascade structure may be 100Mbps or 1000Mbps, depending on the specific application of the vehicle bus communication device 24.
According to the above embodiment, the utility model provides a vehicle bus communication equipment is through at its inside integrated ethernet switch chip to the cascade structure of many vehicle bus communication equipment has been realized. In addition, in the cascade connection of the multi-vehicle bus communication equipment, a USB Hub (Hub) and some additional network switch equipment are not needed, and the cascade connection can be realized only by one Ethernet line between the vehicle bus communication equipment, so that the cascade connection device has the advantages of strong expansion capability, simple circuit and cost saving.
The utility model relates to an embodiment in a vehicle bus communication equipment's cascade structure can be applied to a vehicle bus test system. Fig. 4 is a schematic structural diagram of a vehicle bus testing system according to another embodiment of the present invention. As shown in fig. 4, the vehicle bus test system 2 may include a plurality of vehicle electronic controllers 21, a plurality of vehicle buses 22, a computer 23, and a plurality of vehicle bus communication devices 24.
The plurality of vehicle buses 22 are respectively connected to the plurality of vehicle electronic controllers 21. The computer 23 is used to communicate with the vehicle electronic controller 21. The plurality of vehicle bus communication devices 24 are connected to each other in a cascade, wherein the first level vehicle bus communication device 24 is connected to the computer 23, and each vehicle bus communication device 24 is connected to a corresponding vehicle bus 22.
The vehicle bus communication device 24 may include a main controller 241 and an ethernet switch chip 242, and the main controller 241 and the ethernet switch chip 242 are connected to each other through an ethernet interface.
In this embodiment, the master controller 241 is a type of microcontroller with a vehicle bus communication interface and an ethernet interface, which may be model number MPC5748G from NXP corporation. In some other embodiments, the main Controller 241 may be one of MCU (Micro Controller Unit), soc (system on a chip), FPGA (Field-Programmable Gate Array), etc. according to different applications of the vehicle bus communication device 24.
The master controller 241 may also include transceiver circuitry (not shown) of the vehicle bus 22 that may be used to convert the transceived signals of the vehicle bus 22. The vehicle bus communication device 24 may further include a memory 243, and the memory 243 is connected to the main controller 241 for storing various test data and programs, etc.
The ethernet switch chip 242 may include a third communication interface 2421, a fourth communication interface 2422, and a fifth communication interface 2423, where the third communication interface 2421, the fourth communication interface 2422, and the fifth communication interface 2423 are ethernet interfaces, and the number of the ethernet interfaces included in the ethernet switch chip 242 is greater than or equal to 3.
The third communication interface 2421 of the ethernet switch chip 242 may be connected to the second communication interface 2412 of the host controller 241, and the fourth communication interface 2422 and the fifth communication interface 2423 communicate with the host controller 241 through the third communication interface 2421. The rate of the fourth communication interface 2422 and the fifth communication interface 2423 may be 100Mbps or 1000Mbps, depending on the specific test scenario of the vehicle bus test system 2.
The vehicle electronic controller 21 is used for controlling the driving state of the vehicle and implementing various functions of the vehicle, and mainly utilizes data acquisition and exchange of various sensors and buses to judge the vehicle state and the intention of a driver and control the vehicle through an actuator.
The Vehicle Electronic controller 21 may be classified into various types according to various functions of the Vehicle Electronic controller 21, such as an Engine Management System (EMS), an automatic Transmission Control Unit (TCU), a Body Control Module (BCM), an Electronic Stability Control System (ESP), a Battery Management System (BMS), a Vehicle Control Unit (VCU), and the like.
The vehicle bus 22 is correspondingly connected with a plurality of vehicle electronic controllers 21. In order to simplify the connection circuit between the vehicle-mounted electronic controllers 21 and to reduce the cost, a plurality of vehicle electronic controllers 21 on the entire vehicle can be connected via a vehicle bus 22 and can exchange data with one another.
The vehicle bus 22 may be a combination of one or more of CAN, CANFD, LIN, on-board ethernet, Flexray, and different types of vehicle buses 22 may be used for different systems on the automobile.
According to the above embodiment, the utility model provides a vehicle bus communication equipment is through at its inside integrated ethernet switch chip to realized when the computer needs the vehicle electronic controller communication with large quantity, vehicle bus communication equipment as communication medium can be through the mode extension of cascading ethernet a plurality of vehicle bus communication equipment. In addition, in the cascade connection of the multi-vehicle bus communication equipment, a USB Hub (Hub) and some additional network switch equipment are not needed, and the cascade connection can be realized only by one Ethernet line between the vehicle bus communication equipment, so that the cascade connection device has the advantages of strong expansion capability, simple circuit and cost saving.
Having thus described the basic concept, it will be apparent to those skilled in the art that the foregoing disclosure is by way of example only, and is not intended to limit the invention. Various modifications, improvements and adaptations of the present invention may occur to those skilled in the art, although not explicitly described herein. Such modifications, improvements and adaptations are proposed in the present invention and still fall within the spirit and scope of the exemplary embodiments of the present invention.
The present invention has been described using specific terms to describe embodiments of the invention. Reference throughout this specification to "one embodiment," "an embodiment," and/or "some embodiments" means that a particular feature, structure, or characteristic described in connection with at least one embodiment of the invention is included. Therefore, it is emphasized and should be appreciated that two or more references to "an embodiment" or "one embodiment" or "an alternative embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, certain features, structures, or characteristics of one or more embodiments of the invention may be combined as appropriate.
Similarly, it should be noted that in the preceding description of embodiments of the invention, various features are sometimes incorporated in an embodiment, figure, or description thereof in order to simplify the description of the present disclosure and thereby aid in the understanding of one or more embodiments of the present disclosure. This method of disclosure, however, is not intended to suggest that the claimed subject matter requires more features than are expressly recited in the claims. Indeed, the embodiments may be characterized as having less than all of the features of a single embodiment disclosed above.
Although the present invention has been described with reference to the present specific embodiments, it will be understood by those skilled in the art that the above embodiments are merely illustrative of the present invention, and various equivalent changes and substitutions may be made without departing from the spirit of the present invention, and therefore, changes and modifications to the above embodiments within the spirit of the present invention will fall within the scope of the appended claims.
Claims (10)
1. A vehicle bus communication apparatus, comprising:
the main controller comprises a first communication interface and a second communication interface, and the first communication interface is connected with a vehicle bus;
the Ethernet switch chip comprises a third communication interface, a fourth communication interface and a fifth communication interface, wherein the third communication interface is connected with the second communication interface of the main controller, and the fourth communication interface and the fifth communication interface are communicated with the main controller through the third communication interface;
the second communication interface, the third communication interface, the fourth communication interface and the fifth communication interface are ethernet interfaces.
2. The vehicle bus communication device as claimed in claim 1, wherein the ethernet switch chip includes a number of ethernet interfaces ≧ 3.
3. The vehicle bus communication device of claim 1, wherein the vehicle bus is a combination of one or more of CAN, CANFD, LIN, on-board ethernet, Flexray; the main controller is an MCU, an SoC or an FPGA.
4. The vehicle bus communication device of claim 1, wherein the first communication interface is adapted to connect to a vehicle electronic controller via the vehicle bus.
5. The vehicle bus communication device of claim 1, wherein the master controller further comprises a transceiver circuit of the vehicle bus.
6. A vehicle bus test system, comprising:
a plurality of vehicle electronic controllers;
a plurality of vehicle buses respectively connected to the plurality of vehicle electronic controllers correspondingly;
a computer for communicating with the vehicle electronic controller;
a plurality of vehicle bus communication devices interconnected in a cascade arrangement, wherein a first level of vehicle bus communication devices is connected to the computer and each vehicle bus communication device is connected to a corresponding vehicle bus, wherein the vehicle bus communication devices comprise:
the main controller comprises a first communication interface and a second communication interface, and the first communication interface is connected with a vehicle bus;
the Ethernet switch chip is used for communicating a computer and the vehicle bus, comprises a third communication interface, a fourth communication interface and a fifth communication interface, and is connected with the second communication interface of the main controller;
the second communication interface, the third communication interface, the fourth communication interface and the fifth communication interface are ethernet interfaces.
7. The vehicle bus test system of claim 6, wherein the plurality of vehicle bus communication devices are interconnected via an Ethernet interface.
8. The vehicle bus test system of claim 6, wherein the Ethernet switch chip includes a number of Ethernet interfaces ≧ 3.
9. The vehicle bus test system of claim 6, wherein the vehicle bus is a combination of one or more of CAN, CANFD, LIN, on-board Ethernet, Flexray; the main controller is an MCU, an SoC or an FPGA.
10. The vehicle bus test system of claim 6, wherein the first communication interface is adapted to connect to a vehicle electronic controller via the vehicle bus, and the master controller further comprises a transceiver circuit of the vehicle bus.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020379242.7U CN211319064U (en) | 2020-03-23 | 2020-03-23 | Vehicle bus communication equipment and vehicle bus test system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020379242.7U CN211319064U (en) | 2020-03-23 | 2020-03-23 | Vehicle bus communication equipment and vehicle bus test system |
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| CN211319064U true CN211319064U (en) | 2020-08-21 |
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| CN202020379242.7U Active CN211319064U (en) | 2020-03-23 | 2020-03-23 | Vehicle bus communication equipment and vehicle bus test system |
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