Vehicle master controller communication system and control method

Abstract

The invention provides a vehicle master controller communication system and a control method. The vehicle master controller communication system comprises a master controller, a first processor, a second processor, a first bus, a second bus, a third bus and a fourth bus, the first processor and the second processor communicate with each other, and when any processor breaks down, the other processor is switched to conduct instruction transmission; when the first bus or the second bus breaks down, the processor connected with the other bus is switched to conduct instruction transmission. According to the heterogeneous redundant communication system of the two processors, the master controller and the two processors are in redundant communication through the bus, and meanwhile the two processors are connected through the bus to conduct fault and collected information interaction. When any processor or bus breaks down, the other processor can be immediately switched to carry out instruction transmission, and normal system communication is ensured; the communication reliability of the master controller can be improved, and the safety performance of the vehicle is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of vehicle communication, and in particular, relates to a vehicle master controller communication system and a control method. Background Art

[0002] The vehicle master controller is the core device for controlling vehicle driving. It is used for input and output of control commands such as vehicle wake-up, reversing, speed regulation, and braking. Its output signal is sent to the vehicle through the network module. Existing network modules generally adopt a single controller architecture. Once the network module itself fails, the vehicle master controller command will fail, resulting in a great hidden danger in the vehicle traction / brake control system.

[0003] Patent application CN106347380A uses a redundant control method of hard-line control and network control. The switching between these two control modes relies on the driver's manual judgment. When a communication failure occurs in a certain control mode, the driver manually switches to another control mode. There is a certain time delay, and the reliability of the main controller communication is low, which affects the vehicle safety performance. Summary of the invention

[0004] The purpose of the present invention is to provide a vehicle master controller communication system and control method to improve the reliability of vehicle master controller communication in view of the deficiencies in the prior art.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] A vehicle master controller communication system, comprising a master controller, a first processor, a second processor, a first bus, a second bus, a third bus, and a fourth bus;

[0007] The master controller includes a first encoder and a second encoder;

[0008] The first encoder is connected to the first processor and the second processor via the first bus;

[0009] The second encoder is connected to the first processor and the second processor via the second bus;

[0010] The first processor and the second processor are respectively connected to a system that needs to receive instructions from a master controller through the fourth bus;

[0011] The first processor is connected to the second processor via a third bus;

[0012] The first processor and the second processor communicate with each other; when any processor fails, the other processor is switched to perform instruction transmission; when the first bus or the second bus fails, the processor connected to the other bus is switched to perform instruction transmission.

[0013] The present invention adopts a heterogeneous redundant communication system of two processors. The master controller and the two processors respectively perform redundant communication through buses. At the same time, the two processors are connected by a bus to interact with each other in fault and collected information. When any processor or bus fails, the other processor can be immediately switched to transmit instructions to ensure normal system communication. The present invention can improve the reliability of the master controller communication and improve the safety performance of the vehicle.

[0014] Furthermore, the first processor and the second processor are of different types. Based on two different types of processors, common cause failures can be avoided.

[0015] Common cause failure refers to the simultaneous failure of two or more units in a system due to a common cause.

[0016] Furthermore, the first bus, the second bus, the third bus, and the fourth bus are any one of the following buses: CAN bus, 485 bus, Ethernet, MVB, and serial port.

[0017] Based on the same inventive concept, the present invention also provides a vehicle master controller communication control method, including the following process:

[0018] Selecting one of the first processor and the second processor to perform instruction transmission;

[0019] The first processor and the second processor communicate with each other, recognize each other's processor and bus status, and perform instruction exchange;

[0020] When a processor or bus failure is detected, the command transmission is switched to a normal processor or a processor connected to a normal bus.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The present invention adopts a heterogeneous redundant communication system of two processors. The master controller and the two processors respectively perform redundant communication through buses. At the same time, the two processors are connected by a bus to interact with each other in fault and collected information. When any processor or bus fails, the other processor can be immediately switched to transmit instructions to ensure normal system communication. The present invention can improve the reliability of the master controller communication and improve the safety performance of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram of a vehicle master controller communication system of the present invention. DETAILED DESCRIPTION

[0024] The present invention will be described in detail below in conjunction with the embodiments. It should be noted that the embodiments and features of the embodiments of the present invention can be combined with each other without conflict. For the convenience of description, if the words "upper", "lower", "left" and "right" appear in the following, they only indicate that the upper, lower, left and right directions are consistent with the drawings themselves, and do not limit the structure.

[0025] Example

[0026] like Figure 1 The vehicle master controller communication system of this embodiment includes a master controller, a first processor, a second processor, a first bus, a second bus, a third bus, and a fourth bus.

[0027] The master controller includes a first encoder and a second encoder; the first encoder is connected to the first processor and the second processor through a first bus; the second encoder is connected to the first processor and the second processor through a second bus; the first processor and the second processor are respectively connected to the system that needs to receive the master controller instructions through a fourth bus; the first processor is connected to the second processor through a third bus.

[0028] The first processor and the second processor communicate with each other; when any processor fails, the other processor is automatically switched to transmit instructions; when the first bus or the second bus fails, the processor connected to the other bus is automatically switched to transmit instructions.

[0029] In some implementations of this embodiment, the first processor is a CPU, the second processor is an FPGA, the first bus is a CAN bus, the second bus is a 485 bus, the third bus is a serial port, and the fourth bus is a CAN bus.

[0030] The first encoder and the second encoder collect the wheel rotation angle, and output the rotation angle command signal at the same time, which are transmitted to the CPU and FPGA through the CAN bus and the 485 bus respectively, and the CPU is selected to transmit the rotation angle command signal to the vehicle traction / brake control system through the fourth bus. The CPU and the FPGA use serial communication to monitor each other's processors, buses and working states. When the CPU fails, the CPU stops transmitting the rotation angle command signal, the FPGA recognizes the fault information, and starts transmitting the rotation angle command signal to the vehicle traction / brake control system through the fourth bus. Or when the first bus fails, the CPU stops transmitting the rotation angle command signal, the FPGA recognizes the fault information, and transmits the rotation angle command signal to the vehicle traction / brake control system through the fourth bus.

[0031] In some other implementations of this embodiment, the first processor is a CPU, the second processor is an FPGA, the first bus is Ethernet, the second bus is Ethernet, the third bus is Ethernet, and the fourth bus is Ethernet.

[0032] The first encoder and the second encoder transmit the direction command signal to the CPU and FPGA through the first bus and the second bus respectively at the same time, and select the FPGA to transmit the direction command signal to the vehicle traction / brake control system through the fourth bus. The CPU and FPGA use the third bus to communicate and monitor each other's processor, bus and working status. When the FPGA fails, the FPGA stops transmitting the direction command signal, the CPU recognizes the fault information, and starts to transmit the direction command signal to the vehicle traction / brake control system through the fourth bus. Or when the second bus fails, the FPGA stops transmitting the direction command signal, the CPU recognizes the fault information, and transmits the direction command signal to the vehicle traction / brake control system through the fourth bus.

[0033] This embodiment adopts a system architecture based on heterogeneous redundancy of FPGA and CPU. The master controller and FPGA and CPU use a bus for redundant communication (such as CAN bus + RS485 bus), and the FPGA and CPU use a bus communication (such as serial port) to interact with each other in terms of fault, working status and command information. When any processor or bus fails, another processor is immediately switched to transmit the command to ensure normal system communication, which can effectively improve the security and reliability of the master controller communication and improve the vehicle safety performance.

[0034] The contents explained in the above embodiments should be understood as these embodiments are only used to more clearly illustrate the present invention, and are not used to limit the scope of the present invention. After reading the present invention, various equivalent forms of modifications to the present invention by those skilled in the art all fall within the scope defined by the claims attached to this application.

Claims

1. A vehicle master controller communication system, characterized in that: It includes a master controller, a first processor, a second processor, a first bus, a second bus, a third bus, and a fourth bus; The master controller includes a first encoder and a second encoder; The first encoder is connected to the first processor and the second processor via the first bus; The second encoder is connected to the first processor and the second processor via the second bus; The first processor and the second processor are respectively connected to a system that needs to receive instructions from a master controller through the fourth bus; The first processor is connected to the second processor via a third bus; The first processor and the second processor communicate with each other; when any processor fails, the other processor is switched to perform instruction transmission; when the first bus or the second bus fails, the processor connected to the other bus is switched to perform instruction transmission.

2. The vehicle master controller communication system according to claim 1, characterized in that: The first processor and the second processor are of different types.

3. The vehicle master controller communication system according to claim 1, characterized in that: The first bus, the second bus, the third bus and the fourth bus are any one of the following buses: CAN bus, 485 bus, Ethernet, MVB and serial port.

4. A vehicle master controller communication control method, characterized in that: The vehicle master controller communication system according to any one of claims 1 to 3 is used, comprising the following process: Selecting one of the first processor and the second processor to perform instruction transmission; The first processor and the second processor communicate with each other, identify each other's processor and bus status, and perform instruction exchange; When a processor or bus failure is detected, the command transmission is switched to a normal processor or a processor connected to a normal bus.

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