CN115086151A - Communication system, communication method, vehicle body controller and storage medium - Google Patents
Communication system, communication method, vehicle body controller and storage medium Download PDFInfo
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- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
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Abstract
The present application relates to a communication system, a communication method, a vehicle body controller, and a storage medium. Wherein, communication system includes: the target controller is used for carrying out data interaction with other devices through a first network segment; the vehicle body controller is used for forwarding the communication data of the target controller to other devices; one end of the vehicle body controller is connected with the target controller through a first network segment, and the other end of the vehicle body controller is connected with other devices through a second network segment. By applying the communication system provided by the application, the influence caused by the failure of the low-voltage wiring harness of an important controller in an automobile can be improved.
Description
Technical Field
The present application relates to the field of automotive automation control technologies, and in particular, to a communication system, a communication method, a vehicle body controller, and a storage medium.
Background
With the development of automation control technology, various controllers are distributed on automobiles. These controllers ensure on the one hand an efficient operation of the vehicle and on the other hand also determine whether the vehicle can be operated normally. Especially, in the automobile, such as a Vehicle Control Unit (VCU), a Battery Management System (BMS), and other key controllers, if these controllers fail, the automobile will have serious failures such as degraded power and even power interruption.
Through practical research, the reasons for the faults are mostly caused by the failure of the low-voltage wiring harness of the controller. When the low-voltage wiring harness fails, the controller interrupts data interaction with other devices, thereby causing the above-mentioned fault to occur.
In this regard, the possibility of occurrence of the low-voltage harness failure condition of the important controller can be reduced by optimizing the layout design of the low-voltage harness of the controller, thereby reducing the serious influence caused by the low-voltage harness failure of the important controller. However, the method is not universal, and is time-consuming and labor-consuming.
Disclosure of Invention
Based on this, a communication system, a communication method, a vehicle body controller, and a storage medium are provided that reduce the serious influence due to failure of a low-voltage harness of an important controller.
In a first aspect, the present application provides a communication system comprising: the target controller is used for carrying out data interaction with other devices through a first network segment; the vehicle body controller is used for forwarding the communication data of the target controller to other devices; one end of the vehicle body controller is connected with other devices through a first network segment, and the other end of the vehicle body controller is connected with the target controller through a second network segment.
With reference to the first aspect, in a first possible implementation manner of the first aspect, the target controller includes a vehicle controller or a battery management system, the first network segment includes a power network segment, and the second network segment includes a chassis network segment; one end of the first interface unit of the vehicle body controller is connected with other devices through a power network segment, and the other end of the first interface unit of the vehicle body controller is connected with the vehicle control unit or the battery management system through a chassis network segment.
With reference to the first aspect, in a second implementable manner of the first aspect, the target controller includes a vehicle control unit, the first network segment includes a chassis network segment, and the second network segment includes a first redundant network segment; one end of a second interface unit of the vehicle body controller is connected with other devices through a chassis network segment, and the other end of the second interface unit of the vehicle body controller is connected with the whole vehicle controller through a first redundant network segment.
With reference to the first aspect, in a third implementable manner of the first aspect, the target controller includes an electric power steering system or an integrated electric brake system, the first network segment includes a chassis network segment, and the second network segment includes a second redundant network segment; one end of a second interface unit of the automobile body controller is connected with other devices through a chassis network segment, and the other end of the second interface unit of the automobile body controller is connected with an electric power steering system or an integrated electric braking system through a second redundant network segment.
With reference to the first aspect, in a fourth possible implementation manner of the first aspect, the vehicle body controller and/or the target controller respectively include at least two lines connected to the auxiliary power supply device, wherein the at least two lines connected to the power supply device are in a parallel state.
In a second aspect, the present application also provides a communication method applied to the vehicle body controller as described in the first aspect or any one of the first aspects. The communication method comprises the following steps: receiving a network segment switching zone bit, wherein the network segment switching zone bit is used for indicating that a target controller is disconnected from a first network segment connected with other devices; under the condition of receiving the network segment switching zone bit, switching the communication network segment of the target controller and other devices from a first network segment to a second network segment; and forwarding communication data between the target controller and other devices through the second network segment.
With reference to the second aspect, in a first possible implementation manner of the second aspect, the step of forwarding communication data between the target controller and other devices through the second network segment includes: under the condition that the communication data of the target controller is received through the second network segment, the communication data of the target controller is sent to other devices through the first network segment; and under the condition that the communication data of other devices are received through the first network segment, the communication data of other devices are sent to the target controller through the second network segment.
In a third aspect, the present application further provides a vehicle body controller, including: the network segment switching system comprises a receiving unit, a switching unit and a switching unit, wherein the receiving unit is used for receiving a network segment switching zone bit, and the network segment switching zone bit is used for indicating that a target controller is disconnected from a first network segment connected with other devices; the switching unit is used for switching the communication network segment of the target controller and other devices from a first network segment to a second network segment under the condition of receiving the network segment switching zone bit; and the forwarding unit is used for forwarding the communication data between the target controller and other devices through the second network segment.
With reference to the third aspect, in a first implementable manner of the third aspect, the forwarding unit is specifically configured to: under the condition that the communication data of the target controller is received through the second network segment, the communication data of the target controller is sent to other devices through the first network segment; and under the condition that the communication data of other devices are received through the first network segment, the communication data of other devices are sent to the target controller through the second network segment.
In a fourth aspect, the present application further provides a vehicle body controller, including a processor and a memory, where the processor and the memory are connected through a bus; a processor for executing a plurality of instructions; a transceiver for exchanging data with other devices; a memory for storing a plurality of instructions adapted to be loaded by the processor and to perform the communication method as described in the second aspect or any one of the embodiments of the second aspect.
In a fifth aspect, the present application further provides a computer-readable storage medium having stored therein a plurality of instructions adapted to be loaded by a processor and to execute the communication method according to the second aspect or any one of the embodiments of the second aspect.
In summary, in the communication system provided in the present application, the target controller is connected to other devices through a first network segment, and the target controller is also connected to the vehicle body controller through a second network segment, so that when the target controller drops from the first network segment, that is, when the low-voltage wire harness of the target controller fails, the vehicle body controller may obtain the communication data of the target controller through the second network segment and send the communication data of the target controller to the other devices through the first network segment, or the vehicle body controller obtains the communication data of the other devices through the first network segment and sends the communication data of the other devices to the target controller through the second network segment, so as to complete the forwarding process. Therefore, the application reduces the serious influence caused by the failure of the low-voltage wire harness of the important controller by adding a redundant line between the target controller and the vehicle body controller.
Drawings
FIG. 1 is a diagram of an exemplary communications system;
FIG. 2 is a block diagram of a communication system in one embodiment;
FIG. 3 is a block diagram of a communication system in another embodiment;
fig. 4 is a block diagram showing the structure of a communication system in another embodiment;
fig. 5 is a block diagram showing the structure of a communication system in another embodiment;
fig. 6 is a block diagram showing the structure of a communication system in another embodiment;
FIG. 7 is a flow diagram illustrating a method of communication in one embodiment;
FIG. 8 is a schematic block diagram of a vehicle body controller provided herein;
fig. 9 is a structural block diagram of a vehicle body controller provided in the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
Since the embodiments of the present application relate to a large number of terms in the art, the following description will first describe terms and concepts related to the embodiments of the present application for easy understanding.
1. Vehicle Body controller (Body Control Module, BCM)
The body controller is also called a body computer (body computer), and is an Electronic Control Unit (ECU) for controlling electrical systems of the body, and is one of important components of the automobile. The vehicle body controller can be connected with other vehicle-mounted ECUs through a bus and can control electric vehicle windows, electric rearview mirrors, an air conditioner, an anti-theft lock, a lamp and the like. The vehicle body controller has the advantages of high integration level, stable operation, convenience in interface expansion and the like. It should be noted that the vehicle body controller may implement the method which is described in the following application and can be applied to the vehicle body controller, for example, the communication data of the target controller may be forwarded to other devices, or the communication data of other devices may be forwarded to the target controller, and the like, which is not described herein again.
2. Vehicle Control Unit (VCU)
The vehicle controller is a central control unit of the vehicle and is the core of the whole control system. The vehicle controller is responsible for normal running, braking energy feedback, energy management of a vehicle driving system and a power battery, network management, fault diagnosis and processing, vehicle state monitoring and the like of the vehicle, so that the vehicle can work normally and stably under the conditions of better dynamic property, higher economy and reliability. The performance of the whole vehicle controller directly determines the performance of the whole vehicle, and the function of a medium current baffle is achieved.
3. Battery Management System (BMS)
The battery management system can intelligently manage and maintain each battery unit, prevent the battery from being overcharged and overdischarged, prolong the service life of the battery and monitor the state of the battery. Since the safety of the battery is related to whether the new energy automobile can normally operate, the battery management system is an important device for the automobile.
4. Electric Power Steering system (Electric Power Steering, EPS)
An electric power steering system refers to a power steering system that relies on an electric motor to provide an assist torque. The system directly provides steering power by the electric power-assisted machine, saves a power steering oil pump, a hose, hydraulic oil, a conveyor belt and a belt pulley arranged on an engine which are necessary for a hydraulic power steering system, saves energy and protects the environment.
5. Integrated electric Brake system (IPB)
The integrated electric braking system is a set of electric control braking system, has quick response and accurate control, and can obviously enhance the efficiency of braking energy recovery when the integrated electric braking system is combined with a new energy vehicle.
It should be noted that the drawings provided in this embodiment are only for schematically illustrating the basic idea of the present invention, and the components related to the present invention are only shown in the drawings and not drawn according to the number, shape and size of the components in actual implementation, and the form, quantity and proportion of each component in actual implementation may be arbitrarily changed, and the component layout may be more complicated. The structures, proportions, sizes, and other dimensions shown in the drawings and described in the specification are for understanding and reading the present disclosure, and are not intended to limit the scope of the present disclosure, which is defined in the claims, and are not essential to the art, and any structural modifications, changes in proportions, or adjustments in size, which do not affect the efficacy and attainment of the same are intended to fall within the scope of the present disclosure. Meanwhile, the directions or positional relationships referred to in the specification as "upper", "lower", "left", "right", "middle", "longitudinal", "lateral", "horizontal", "inner", "outer", "radial", "circumferential", and the like are directions or positional relationships based on the directions or positional relationships shown in the drawings, and are merely for convenience of description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operated in a specific direction, and that changes or adjustments of the relative relationships thereof are considered to be within the scope of the present invention without substantial technical changes. And therefore should not be construed as limiting the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
It should be noted that the communication system related to the present application is used in a communication system formed by various Control devices on an automobile, the target controller and other devices may also be various Control devices, and the various Control devices may include, but are not limited to, a body controller, a vehicle controller, a battery management system, an electric power steering system, an integrated electric brake system, an Electronic Control Unit (ECU), a Central Processing Unit (CPU), and other devices, a general processor, a coprocessor, a Digital Signal Processor (DSP), an application-specific integrated circuit (ASIC), an Field Programmable Gate Array (FPGA), other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. The Controller devices may communicate with each other according to, but not limited to, a Controller Area Network (CAN) communication protocol, and the Controller Area Network is a serial communication Network capable of effectively supporting distributed control and real-time control.
At present, in order to solve the problem of failure of the low-voltage wire harness of the controller, the possibility of occurrence of failure of the low-voltage wire harness of an important controller can be reduced by optimizing the layout design of the low-voltage wire harness of the controller, so that the serious influence caused by the failure of the low-voltage wire harness of the important controller is reduced. However, the method is not universal, and is time-consuming and labor-consuming.
In view of the above, the present application provides a communication system applied to an automobile, which improves the problem of failure of a low-voltage wire harness of a controller by adopting a wire harness redundancy scheme, thereby reducing occurrence of serious faults such as complete vehicle power degradation and even power interruption. Specifically, the communication system provided by the application comprises a target controller for performing data interaction with other devices through a first network segment; the vehicle body controller is used for forwarding the communication data of the target controller to other devices; one end of the vehicle body controller is connected with other devices through a first network segment, and the other end of the vehicle body controller is connected with the target controller through a second network segment.
It should be noted that, in the present application, in the case that the target controller is disconnected, the vehicle body controller may be selected to forward the communication data of the target controller, because the vehicle body controller includes, but is not limited to, the following advantages: 1. the function is strong and stable, the car body control system is more advanced and complex than the common system, and has strong function, and the running process has the characteristics of safety and stability; 2. the automobile body controller is provided with a plurality of interfaces, and the automobile body controller is connected with various automobile body electrical equipment as required, so a plurality of control interfaces and detection interfaces are reserved at the beginning of design, a plurality of network segments can be connected in the application, and the requirement of line redundancy is met. It is thus clear that because the automobile body controller has above advantage for the communication system that this application provided can the steady operation, and the trouble is few, and realization that moreover can be very convenient is on original car structure, only need according to the communication system's that this application provided structure, carry out corresponding connection can to controller in the car and automobile body controller.
It should be noted that, based on the description of the above schemes, it can be seen that one end of the target controller is connected to other devices through the first network segment, the other end of the target controller is connected to the vehicle body controller through the second network segment, and the vehicle body controller is also connected to the first network segment, so that the target controller can directly communicate with other devices through the first network segment, or indirectly communicate with other devices through the second network segment, the vehicle body controller, and the first network segment, before the target controller drops from the first network segment, the former can be used for communication, after dropping, the latter can be used for communication, and in the latter, the target controller can also be regarded as being connected to other devices through the second network segment. Therefore, the second network segment can be used as a substitute for the first network segment, namely the second network segment is a redundant line of the first network segment, and line redundancy between the target controller and other devices can be realized, so that serious influence caused by failure of a low-voltage wire harness of an important controller is reduced.
In order to better understand the communication system proposed in the present application, the present application will be described in detail with reference to the application environment diagram of the communication system in fig. 1 and the structural block diagram of the communication system shown in fig. 2.
As shown in fig. 2, the communication system of the present application includes a vehicle body controller, a target controller, and other devices, where one end of the vehicle body controller, the target controller, and the other devices are connected through a first network segment, and the other end of the vehicle body controller and the other end of the target controller are connected through a second network segment. It can be understood that, in a general communication system, in order to implement communication between a target controller and other devices, the target controller and other devices only need to be connected to a first network segment through a low-voltage wire harness, so that the target controller and other devices can be connected through the first network segment. But when the target control device drops from the first network segment, the target controller cannot communicate with other devices. Therefore, the vehicle body controller is also accessed to the first network segment, and the vehicle body controller and the target controller are accessed to the second network segment, so that when the target controller is disconnected from the first network segment, the communication data of the target controller can be forwarded to other devices through the second network segment, and the communication data of other devices can be forwarded to the target controller, so that the target controller can keep communication with other devices even after the target controller is disconnected from the first network segment. Therefore, as the automobile body controller is an original device in the automobile, the problem of low-voltage wiring harness failure of the controller can be solved only by adding redundant circuits on the automobile body controller and the target controller, so that the occurrence of serious faults such as complete automobile power degradation and even power interruption is reduced.
More specifically, as shown in fig. 1, when the target control device is disconnected from the first network segment, that is, when the low-voltage wire harness for connecting the target controller to the first network segment fails, the target controller sends a network segment switching flag bit to the vehicle body controller through the second network segment, or other devices send network segment switching flag bits to the vehicle body controller through the first network segment. And after receiving the network segment switching zone bit, the vehicle body controller switches the communication network segment of the target controller and other devices from the first network segment to the second network segment. And after the communication network segments are switched, the vehicle body controller forwards the communication data between the target controller and other devices through a second network segment. Specifically, the forwarding includes: under the condition that the communication data of the target controller is received through the second network segment, the communication data of the target controller is sent to other devices through the first network segment; and under the condition that the communication data of other devices are received through the first network segment, the communication data of other devices are sent to the target controller through the second network segment.
In the following, for better understanding of the communication system described in the present application, several more specific implementations will be proposed in conjunction with the communication system shown in fig. 3-6. It should be noted that fig. 3-fig. 6 all belong to specific implementation manners in accordance with the communication system structure shown in fig. 2, wherein the communication system shown in fig. 6 is a sum of the communication systems shown in fig. 3, fig. 4 and fig. 5, and is a more specific embodiment of the communication system shown in fig. 3-fig. 5. In addition, in order to better reflect the differences and connections of several communication systems, the portions actually included in each communication system are enclosed by dashed boxes, so the communication systems of fig. 3, 4 and 5 are actually the bold and black portions in the dashed boxes.
As shown in fig. 3, in another implementable manner, the target controller in the communication system includes a vehicle controller or a battery management system, the first network segment includes a power network segment, and the second network segment includes a chassis network segment; one end of the first interface unit of the vehicle body controller is connected with other devices through a power network segment, and the other end of the first interface unit of the vehicle body controller is connected with the vehicle control unit or the battery management system through a chassis network segment. Under the condition that the target controller is the whole vehicle controller, the other devices are battery management systems; and under the condition that the target controller is a battery management system, the other devices are the whole vehicle controller.
Based on the communication system described in the above embodiment, when the vehicle control unit (or the battery management system) is disconnected from the power network segment, that is, when the wire harness used for connecting the vehicle control unit to the power network segment fails, the first interface unit of the vehicle body controller receives the first network segment switching flag bit sent by the vehicle control unit or the battery management system, where the first network segment switching flag bit is used to indicate that the vehicle control unit is disconnected from the power network segment, so that after receiving the first network segment switching flag bit, the first interface unit of the vehicle body controller switches the communication network segment between the vehicle control unit and the battery management system to the chassis from the power network segment, and forwards the communication data between the vehicle control unit and the battery management system through the chassis network segment, that is, under the condition that the communication data of the vehicle control unit (or the battery management system) is received through the chassis network segment, and sending the communication data of the vehicle control unit to the battery management system (or the vehicle control unit) through the power network segment, and sending the communication data of the battery management system to the vehicle control unit through the chassis network segment under the condition that the communication data of the battery management system (or the vehicle control unit) is received through the power network segment.
Therefore, under the condition that the vehicle controller (or the battery management system) is disconnected from the power network segment, the chassis network segment in the communication system can be used as a redundant network segment of the power network segment, so that the first interface unit of the vehicle body controller can forward communication data for the vehicle controller (or the battery management system) disconnected from the power network segment, the influence caused by the failure of a low-voltage wire harness of an important controller in the vehicle is improved, and the occurrence of serious faults such as vehicle power degradation, even power interruption and the like of the vehicle is reduced.
As shown in fig. 4, in another implementable manner, a target controller in a communication system includes a vehicle control unit, a first network segment includes a chassis network segment, and a second network segment includes a first redundant network segment; one end of a second interface unit of the vehicle body controller is connected with other devices through a chassis network segment, and the other end of the second interface unit of the vehicle body controller is connected with the whole vehicle controller through a first redundant network segment. The other devices are an electric power steering system and an integrated electric brake system.
Based on the communication system described in the above embodiment, when the vehicle control unit drops from the chassis network segment, that is, when the wire harness for accessing to the chassis network segment fails, the second interface unit of the vehicle body controller receives the second network segment switching flag bit sent by the vehicle control unit, the electric power steering system, or the integrated electric braking system, and the second network segment switching flag bit is used for indicating that the vehicle control unit drops from the chassis network segment, so that after receiving the second network segment switching flag bit, the second interface unit of the vehicle body controller switches the communication network segment of the vehicle control unit, the electric power steering system, or the integrated electric braking system from the chassis to the first redundant network segment, and forwards the communication data between the vehicle control unit and the battery management system through the chassis network segment, that is, under the condition that the communication data of the vehicle control unit is received through the first redundant network segment, and sending the communication data of the whole vehicle controller to the electric power steering system or the integrated electric braking system through the chassis network segment, and sending the communication data of the electric power steering system or the integrated electric braking system to the whole vehicle controller through the first redundant network segment under the condition of receiving the communication data of the electric power steering system or the integrated electric braking system through the chassis network segment.
Therefore, under the condition that the vehicle control unit is disconnected from the chassis network segment, the first redundant network segment in the communication system can be used as the redundant network segment of the chassis network segment, so that the second interface unit of the vehicle body controller can forward communication data for the vehicle control unit disconnected from the chassis network segment, the influence caused by the failure of a low-voltage wire harness of an important controller in the vehicle is improved, and the occurrence of serious faults such as vehicle power degradation and even power interruption of the vehicle is further reduced.
In another practical manner, as shown in fig. 5, a target controller in a communication system includes an electric power steering system or an integrated electric brake system, a first network segment includes a chassis network segment, and a second network segment includes a second redundant network segment; one end of a second interface unit of the automobile body controller is connected with other devices through a chassis network segment, and the other end of the second interface unit of the automobile body controller is connected with an electric power steering system or an integrated electric braking system through a second redundant network segment. Wherein, under the condition that the target controller is an electric power steering system, the other devices are integrated electric brake systems; in the case where the target controller is an integrated electric brake system, the aforementioned other device is an electric power steering system.
Based on the communication system described in the above embodiment, when the electric power steering system (or the integrated electric brake system) drops from the chassis network segment, that is, when the wire harness for accessing to the chassis network segment fails, the second interface unit of the vehicle body controller receives a third network segment switching flag bit sent by the vehicle body controller, the electric power steering system, or the integrated electric brake system, where the third network segment switching flag bit is used to indicate that the electric power steering system (or the integrated electric brake system) drops from the chassis network segment, so that after receiving the third network segment switching flag bit, the second interface unit of the vehicle body controller switches the communication network segment between the electric power steering system and the integrated electric brake system from the chassis network segment to a second redundant network segment, and forwards the communication data between the vehicle body controller and the battery management system through the second network segment, that is, the communication data of the electric power steering system (or the integrated electric brake system) is received through the second redundant network segment And under the condition of data, sending the communication data of the electric power steering system (or the integrated electric power steering system) to the integrated electric brake system (or the electric power steering system) through the chassis network segment, and under the condition of receiving the communication data of the integrated electric brake system (or the electric power steering system) through the chassis network segment, sending the communication data of the integrated electric brake system (or the electric power steering system) to the electric power steering system (or the integrated electric brake system) through the second redundant network segment.
Therefore, under the condition that the electric power steering system or the integrated electric brake system is disconnected from the chassis network segment, the second redundant network segment in the communication system can be used as the redundant network segment of the chassis network segment, so that the second interface unit of the automobile body controller can forward communication data for the electric power steering system or the integrated electric brake system disconnected from the chassis network segment, the influence caused by the failure of a low-voltage wire harness of an important controller in an automobile is improved, and the occurrence of serious faults such as the power degradation of the whole automobile and even the power interruption of the automobile is further reduced.
In another implementable manner, as shown in fig. 6, the present application proposes a more specific communication system comprising:
the vehicle control unit is connected with the battery management system through a power network segment, the vehicle control unit is connected with the battery management system through a chassis network segment, and the electric power steering system, the integrated electric braking system and the vehicle control unit are connected with the battery management system through a chassis network segment;
the first interface unit of the vehicle body controller is used for forwarding communication data, wherein one end of the first interface unit of the vehicle body controller is connected with the vehicle control unit and the battery management system through a power network segment, and the other end of the first interface unit of the vehicle body controller is connected with the electric power steering system, the integrated electric brake system, the vehicle control unit and the battery management system through a chassis network segment;
and a third port of the second interface unit of the vehicle controller is connected with the electric power steering system and the integrated electric braking system through a second redundant network segment.
In the embodiment of the application, based on the communication system described above, when important controllers such as the vehicle control unit, the battery management system, the electric power steering system, the integrated electric brake system, and the like drop from the connected network segment, the vehicle body controller may forward the communication data on the dropped network segment to the important controller through another network segment connected with the important controller. It should be noted that the vehicle body controller may include at least one or more than one interface unit, and in this embodiment, it is described that the vehicle body controller includes two interface units (i.e., a first interface unit and a second interface unit), it may be understood that, to implement the technical solution described in this application, the first interface unit and the second interface unit may be any two of a plurality of interfaces of the vehicle body controller, and this application is not described in detail again.
Optionally, the present application further provides a communication system based on any of the foregoing embodiments and optional manners. In the communication system, the vehicle body controller and/or the target controller respectively include at least two lines connected to the auxiliary power supply device, wherein the at least two lines connected to the power supply device are in a parallel state.
In this alternative, since the important controllers (including the vehicle body controller and/or the target controller) respectively include at least two lines connected to the auxiliary power supply device, the vehicle does not immediately stop even if the important controllers are disconnected from the main power supply in the vehicle. And because the at least two lines connected with the auxiliary power supply device are in a parallel connection state, any one line is disconnected, and the auxiliary power supply device is not influenced to supply power to the important controller, so that the redundancy of the wire harness can be further improved by implementing the optional mode, and the influence caused by the failure of the low-voltage wire harness of the important controller in the automobile is improved.
In summary, in the communication system provided in the present application, the target controller is connected to other devices through a first network segment, and the target controller is also connected to the vehicle body controller through a second network segment, so that when the target controller drops from the first network segment, that is, when the low-voltage wire harness of the target controller fails, the vehicle body controller may obtain the communication data of the target controller through the second network segment and send the communication data of the target controller to the other devices through the first network segment, or the vehicle body controller obtains the communication data of the other devices through the first network segment and sends the communication data of the other devices to the target controller through the second network segment, so as to complete the forwarding process. Therefore, the application reduces the serious influence caused by the failure of the low-voltage wire harness of the important controller by adding a redundant line between the target controller and the vehicle body controller.
Based on the above embodiments, the present application proposes a communication method, which is applied to the communication system shown in fig. 2. Next, the present application will take an execution subject as a vehicle body controller as an example, and will describe the communication method in more detail with reference to the flowchart of fig. 7. Specifically, the method comprises the following steps:
701: and receiving a network segment switching zone bit.
The network segment switching zone bit is used for indicating that the target controller is disconnected from a first network segment connected with other devices, the network segment switching zone bit can be sent by the target control device or other devices connected with the first network segment, and the network segment switching zone bit comprises at least one bit of N-system data, for example, the network segment switching zone bit is one-bit two-level system data-1. The target controller includes, but is not limited to, a vehicle control unit, a battery management system, an electric power steering, an integrated electric brake, and the like, and the other devices include, but are not limited to, a vehicle control unit, a battery management system, an electric power steering, an integrated electric brake, and the like.
702: and under the condition of receiving the network segment switching zone bit, switching the communication network segment of the target controller and other devices from the first network segment to the second network segment.
After receiving the network segment switching zone bit, the vehicle body controller switches the communication network segment of the target controller and other devices from the first network segment to the second network segment, namely, after the target controller is disconnected from the first network segment, the vehicle body controller again erects a communication bridge between the target controller and other devices through the second network segment.
More specifically, before the target controller is disconnected from the first network segment, the target controller communicates with other devices through the first network segment, and at the moment, the forwarding function of the vehicle body controller is in a forbidden state, so that the vehicle body controller cannot forward the communication data of the target controller and other devices even if the vehicle body controller receives the communication data of the target controller and other devices; after the target controller is disconnected from the first network segment, the vehicle body controller receives the network segment switching zone bit, and switches the communication network segment of the target controller and other devices from the first network segment to the second network segment, the target controller and other devices communicate through the communication lines of the second network segment, the vehicle body controller and the first network segment, at the moment, the forwarding function of the vehicle body controller is in an allowable state, and when the vehicle body controller receives communication data of the target controller and other devices, the data are forwarded.
It should be noted that, before the network segment switching, the target controller directly communicates with other devices through the first network segment, and after the network segment switching, the target controller indirectly communicates with other devices through the second network segment, so that it can be understood that the communication network segment of the target controller and other devices is switched from the first network segment to the second network segment by the vehicle body controller, but it should be noted that before the switching, the communication line of the target controller and other devices is the first network segment, and after the switching, the communication line of the target controller and other devices is the second network segment, the vehicle body controller, and the first network segment, which will not be described again.
703: and forwarding communication data between the target controller and other devices through the second network segment.
The forwarding of the communication data between the target controller and other devices through the second network segment means that the communication data of the target controller is sent to other devices through the first network segment under the condition that the communication data of the target controller is received through the second network segment; and under the condition that the communication data of other devices are received through the first network segment, the communication data of other devices are sent to the target controller through the second network segment.
In another implementable manner, a first interface unit of the vehicle body controller receives a first network segment switching zone bit, wherein the first network segment switching zone bit is used for indicating that the vehicle controller or the battery management system is disconnected from a power network segment connected with other devices; under the condition of receiving the first network segment switching zone bit, switching the communication network segment of the vehicle controller or the battery management system and other devices from the power network segment to the chassis network segment; and forwarding communication data between the vehicle control unit or the battery management system and other devices through the chassis network segment.
The communication method in the above-described optional manner is applied to the first interface unit of the vehicle body controller in the communication system shown in fig. 3. Specifically, a target controller in the communication system comprises a vehicle control unit or a battery management system, a first network segment comprises a power network segment, and a second network segment comprises a chassis network segment; one end of the first interface unit of the vehicle body controller is connected with other devices through a power network segment, and the other end of the first interface unit of the vehicle body controller is connected with the vehicle control unit or the battery management system through a chassis network segment. Wherein, under the condition that the target controller is an electric power steering system, the other devices are integrated electric brake systems; in the case where the target controller is an integrated electric brake system, the aforementioned other device is an electric power steering system.
In another implementable manner, a second interface unit of the vehicle body controller receives a second network segment switching zone bit, wherein the second network segment switching zone bit is used for indicating that the vehicle control unit is disconnected from a chassis network segment connected with other devices; under the condition of receiving a second network segment switching zone bit, switching the communication network segment of the whole vehicle controller and other devices from the chassis network segment to a first redundant network segment; and forwarding communication data between the vehicle control unit and other devices through the first chassis redundant network segment.
The communication method in the above-described optional manner is applied to the second interface unit of the vehicle body controller of the communication system shown in fig. 4. Specifically, a target controller in the communication system comprises a vehicle control unit, a first network segment comprises a chassis network segment, and a second network segment comprises a first redundant network segment; one end of a second interface unit of the vehicle body controller is connected with other devices through a chassis network segment, and the other end of the second interface unit of the vehicle body controller is connected with the whole vehicle controller through a first redundant network segment. The other devices are an electric power steering system and an integrated electric brake system.
In another practical way, the second interface unit of the vehicle body controller receives a third network segment switching flag bit, wherein the third network segment switching flag bit is used for indicating that the electric power steering system or the integrated electric brake system is disconnected from a chassis network segment connected with other devices; under the condition of receiving a third network segment switching zone bit, switching the communication network segment of the electric power steering system or the integrated electric braking system and other devices from the chassis network segment to a second redundant network segment; and forwarding communication data between the electric power steering system or the integrated electric brake system and other devices through a redundant network segment of the second chassis.
The communication method in the above-described alternative mode is applied to the second interface unit of the vehicle body controller of the communication system shown in fig. 5. Specifically, the target controller in the communication system comprises an electric power steering system or an integrated electric braking system, the first network segment comprises a chassis network segment, and the second network segment comprises a second redundant network segment; one end of a second interface unit of the automobile body controller is connected with other devices through a chassis network segment, and the other end of the second interface unit of the automobile body controller is connected with an electric power steering system or an integrated electric braking system through a second redundant network segment. Wherein, under the condition that the target controller is an electric power steering system, the other devices are integrated electric brake systems; on-target control
In another implementable manner, the first interface unit of the vehicle body controller or the second interface unit of the vehicle body controller receives network segment switching zone bits, wherein the network segment switching zone bits include a first network segment switching zone bit, a second network segment switching zone bit and a third network segment switching zone bit, the first network segment switching zone bit is used for indicating that the vehicle control unit or the battery management system is disconnected from a power network segment connected with other devices, the second network segment switching zone bit is used for indicating that the vehicle control unit is disconnected from a chassis network segment connected with other devices, and the third network segment switching zone bit is used for indicating that the electric power steering system or the integrated electric brake system is disconnected from a chassis network segment connected with other devices; under the condition that a first network segment switching zone bit is received by a first interface unit of the vehicle body controller, switching a communication network segment of the vehicle controller or the battery management system and other devices from a power network segment to a chassis network segment, and forwarding communication data between the vehicle controller or the battery management system and other devices through the chassis network segment; under the condition that a second network segment switching zone bit is received by a second interface unit of the vehicle body controller, switching a communication network segment of the vehicle controller and other devices from a chassis network segment to a first redundant network segment, and forwarding communication data between the vehicle controller and other devices through the first chassis redundant network segment; and under the condition of receiving the third network segment switching zone bit, the second interface unit of the vehicle body controller switches the communication network segment of the electric power steering system or the integrated electric brake system and other devices from the chassis network segment to a second redundant network segment, and forwards communication data between the electric power steering system or the integrated electric brake system and other devices through the second chassis redundant network segment.
The communication method in the above alternative is applied to the communication system shown in fig. 6. Specifically, the communication system includes: the vehicle control unit is connected with the battery management system through a power network segment, the vehicle control unit is connected with the battery management system through a chassis network segment, and the electric power steering system, the integrated electric braking system and the vehicle control unit are connected with the battery management system through a chassis network segment; the first interface unit of the vehicle body controller is used for forwarding communication data, wherein one end of the first interface unit of the vehicle body controller is connected with the vehicle control unit and the battery management system through a power network segment, and the other end of the first interface unit of the vehicle body controller is connected with the electric power steering system, the integrated electric brake system, the vehicle control unit and the battery management system through a chassis network segment; and a third port of the second interface unit of the vehicle controller is connected with the electric power steering system and the integrated electric braking system through a second redundant network segment.
In summary, the vehicle body controller of the application determines that the target controller is disconnected from the first network segment through the received network segment switching zone bit, the target controller cannot communicate with other devices connected to the first network segment, and at the moment, the vehicle body controller switches the communication network segment between the target controller and the other devices from the first network segment to the second network segment and forwards communication data between the target controller and the other devices through the second network segment. Therefore, when the target controller is disconnected from the first network segment, the vehicle body controller forwards the communication data in the first network segment to the target controller through the second network segment, and therefore serious influence caused by failure of a low-voltage wire harness of an important controller is reduced.
Referring to fig. 8, the embodiment of the invention also provides a vehicle body controller. The embodiments of the present invention may perform functional unit division on the device according to the above method examples, for example, each functional unit may be divided corresponding to each function, or two or more functions may be integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit. It should be noted that, the division of the cells in the embodiment of the present invention is schematic, and is only one logic function division, and another division manner may be available in actual implementation. As shown in fig. 8, the body controller includes a receiving unit 810, a switching unit 820 and a forwarding unit 830, specifically:
a receiving unit 810, configured to receive a network segment switching flag, where the network segment switching flag is used to indicate that a target controller is disconnected from a first network segment connected to another device; a switching unit 820, configured to switch a communication network segment between a target controller and another device from a first network segment to a second network segment in the case of receiving a network segment switching flag; and a forwarding unit 830, configured to forward communication data between the target controller and another device through the second network segment.
Optionally, the forwarding unit 830 is specifically configured to: under the condition that the communication data of the target controller is received through the second network segment, the communication data of the target controller is sent to other devices through the first network segment; and under the condition that the communication data of other devices are received through the first network segment, the communication data of other devices are sent to the target controller through the second network segment.
Optionally, the target controller includes a vehicle controller or a battery management system, the first network segment includes a power network segment, and the second network segment includes a chassis network segment.
Optionally, the target controller includes a vehicle control unit, the first network segment includes a chassis network segment, and the second network segment includes a first redundant network segment.
Optionally, the target controller includes an electric power steering system or an integrated electric brake system, the first network segment includes a chassis network segment, and the second network segment includes a second redundant network segment.
Referring to fig. 9, a schematic block diagram of a vehicle body controller according to another embodiment of the present application is provided. The vehicle body controller in the present embodiment as shown in the drawings may include: a processor 910, a transceiver 920, and a memory 930. The processor 910, transceiver 920, and memory 930 are coupled by a bus 940. A processor 910 for executing a plurality of instructions; a transceiver 920 for exchanging data with other apparatuses; a memory 930 for storing a plurality of instructions adapted to be loaded by the processor 910 and to perform the method of battery detection as in the above embodiments.
The processor 910 may be an Electronic Control Unit (ECU), a Central Processing Unit (CPU), a general purpose processor, a coprocessor, a Digital Signal Processor (DSP), an application-specific integrated circuit (ASIC), a Field Programmable Gate Array (FPGA), other programmable logic devices, a transistor logic device, a hardware component, or any combination thereof. The processor 910 may also be a combination of computing functions, e.g., comprising one or more microprocessors, a combination of DSPs and microprocessors, and the like. In this embodiment, the processor 910 may adopt a single chip, and various control functions can be realized by programming the single chip, for example, in this embodiment, the functions of acquiring, processing, and demodulating original audio/video data are realized, and the processor has the advantages of strong computing capability and fast processing speed. Specifically, the method comprises the following steps:
the transceiver 920 is configured to perform the function of the receiving unit 810, and is configured to receive a segment switching flag, where the segment switching flag is used to indicate that the target controller is disconnected from a first segment connected to another device; the processor 910 is configured to execute the function of the switching unit 820, and is configured to switch the communication network segment between the target controller and another device from the first network segment to the second network segment in the case of receiving the network segment switching flag; processor 910 is also configured to perform the function of forwarding unit 830 for forwarding communication data between the target controller and other devices via the second network segment.
Optionally, the processor 910 is specifically configured to: under the condition that the communication data of the target controller is received through the second network segment, the communication data of the target controller is sent to other devices through the first network segment; and under the condition that the communication data of other devices are received through the first network segment, the communication data of other devices are sent to the target controller through the second network segment.
Optionally, the target controller includes a vehicle controller or a battery management system, the first network segment includes a power network segment, and the second network segment includes a chassis network segment.
Optionally, the target controller includes a vehicle control unit, the first network segment includes a chassis network segment, and the second network segment includes a first redundant network segment.
Optionally, the target controller includes an electric power steering system or an integrated electric brake system, the first network segment includes a chassis network segment, and the second network segment includes a second redundant network segment.
The present application further provides a computer-readable storage medium having stored thereon a plurality of instructions adapted to be loaded by a processor and to perform the method of any of the preceding embodiments.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above examples only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A communication system for use in an automobile, comprising:
the target controller is used for carrying out data interaction with other devices through a first network segment;
the vehicle body controller is used for forwarding the communication data of the target controller to other devices;
one end of the vehicle body controller is connected with the other devices through the first network segment, and the other end of the vehicle body controller is connected with the target controller through the second network segment.
2. The system of claim 1, comprising:
the target controller comprises a vehicle control unit or a battery management system, the first network segment comprises a power network segment, and the second network segment comprises a chassis network segment;
one end of the first interface unit of the vehicle body controller is connected with other devices through the power network segment, and the other end of the first interface unit of the vehicle body controller is connected with the vehicle control unit or the battery management system through the chassis network segment.
3. The system of claim 1, comprising:
the target controller comprises a whole vehicle controller, the first network segment comprises a chassis network segment, and the second network segment comprises a first redundant network segment;
one end of a second interface unit of the vehicle body controller is connected with the other devices through the chassis network segment, and the other end of the second interface unit of the vehicle body controller is connected with the vehicle control unit through the first redundant network segment.
4. The system of claim 1, comprising:
the target controller comprises an electric power steering system or an integrated electric braking system, the first network segment comprises a chassis network segment, and the second network segment comprises a second redundant network segment;
one end of a second interface unit of the automobile body controller is connected with other devices through the chassis network segment, and the other end of the second interface unit of the automobile body controller is connected with the electric power steering system or the integrated electric brake system through the second redundant network segment.
5. The system according to claim 1, wherein the vehicle body controller and/or the target controller respectively include at least two lines connected to an auxiliary power supply device, wherein the at least two lines connected to the power supply device are in a parallel state.
6. A communication method applied to the vehicle body controller according to any one of claims 1 to 5, comprising:
receiving a network segment switching zone bit, wherein the network segment switching zone bit is used for indicating that a target controller is disconnected from a first network segment connected with other devices;
under the condition of receiving the network segment switching zone bit, switching the communication network segment of the target controller and the other devices from a first network segment to a second network segment;
and forwarding the communication data between the target controller and the other devices through the second network segment.
7. The method of claim 6, wherein the step of forwarding communication data between the target controller and the other device over the second network segment comprises:
under the condition that the communication data of the target controller are received through the second network segment, the communication data of the target controller are sent to other devices through the first network segment;
and under the condition that the communication data of the other devices are received through the first network segment, the communication data of the other devices are sent to the target controller through the second network segment.
8. A vehicle body controller, comprising:
the network segment switching system comprises a receiving unit, a switching unit and a switching unit, wherein the receiving unit is used for receiving a network segment switching zone bit, and the network segment switching zone bit is used for indicating that a target controller is disconnected from a first network segment connected with other devices;
the switching unit is used for switching the communication network segment of the target controller and the other devices from a first network segment to a second network segment under the condition of receiving the network segment switching zone bit;
and the forwarding unit is used for forwarding the communication data between the target controller and the other devices through the second network segment.
9. A vehicle body controller, characterized in that the device comprises a processor and a memory, the processor, transceiver and memory being connected by a bus; the processor to execute a plurality of instructions; the transceiver is used for exchanging data with other devices; the storage medium storing the plurality of instructions adapted to be loaded by the processor and to perform the communication method according to any of claims 6-7.
10. A computer-readable storage medium having stored thereon a plurality of instructions adapted to be loaded by a processor and to perform the communication method according to any one of claims 6-7.
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