Driving mode switching and out-of-control protection system based on vehicle VCU control

Abstract

The invention discloses a driving mode switching and out-of-control protection system based on vehicle VCU (vehicle control unit) control, which belongs to the technical field of vehicle control and comprises a step-down circuit module for controlling voltage output and reducing input voltage to a voltage range for other modules to work; the protection circuit module carries out reverse connection prevention circuit protection, overheat prevention circuit protection and overcurrent prevention circuit protection, the universal interface module provides an interface, an IO interface is changed into different communication interfaces through software program configuration, the communication interface module adopts double CAN communication interfaces to enable CAN bus extension frames and standard frames to be still stable when coexistence exists, and the CAN bus extension frames and the standard frames are still stable when coexistence exists. The control system module is switched to manual driving, remote control of a remote controller and unmanned driving control, the defects of a traditional VCU can be overcome, and the effect that one VCU controls the whole vehicle is truly achieved through the VCU.

Description

Technical Field

[0001] This invention belongs to the field of vehicle control technology, specifically, it relates to a driving mode switching and runaway protection system based on vehicle VCU control. Background Technology

[0002] Currently, thanks to the rapid development of computer network technology and sensor technology, the number of sensors and control interfaces installed on special vehicles is constantly increasing. The system design of the whole vehicle is mainly based on VCU design. In particular, it is necessary to grasp the key points to ensure the rationality of the design and the safety of operation. In the existing VCU, the reserved interfaces are insufficient for the sensors required by special vehicles. Furthermore, given the rise of the field of autonomous driving, the problem of poor scalability of traditional VCUs has gradually been exposed.

[0003] Traditional VCUs can only perform basic driving, steering, and braking control of the vehicle, without additional interfaces for functions such as lighting and sensor data acquisition. Furthermore, when using remote control functions, traditional VCUs can only restore the remote control receiver to default settings for loss of control protection when the remote control receiver cannot receive the remote control signal. Therefore, the vehicle faces a greater risk of loss of control. Summary of the Invention

[0004] The problem to be solved To address the issue that existing traditional VCUs have more interfaces for additional functions such as lighting and sensor data acquisition, and that when using remote control, the remote control receiver can only restore default settings for loss of control protection when it cannot receive a remote control signal, thus posing a significant risk of vehicle loss of control, this invention provides a driving mode switching and loss of control protection system based on the vehicle's VCU control.

[0005] Technical solution To solve the above problems, the present invention adopts the following technical solution.

[0006] A driving mode switching and runaway protection system based on vehicle VCU control includes a step-down circuit module, a protection circuit module, a general interface module, a communication interface module, and a control system module. The step-down circuit module is used to control the voltage output and reduce the input voltage to the voltage range in which other modules operate. The protection circuit module is used for reverse connection protection, overheat protection, and overcurrent protection. The general interface module is used to provide an interface, which can be configured by software program to change the IO interface into different communication interfaces; The communication interface module is used to ensure stability when both the CAN bus extended frame and the standard frame exist simultaneously by employing a dual CAN communication interface. The control system module is used to switch between manual driving, remote control, and unmanned driving.

[0007] Preferably, the step-down circuit module includes two circuits: a 12-30V step-down circuit to 5V and a 5V step-down circuit to 3.3V. The 12-30V step-down circuit to 5V is composed of a PW2312 step-down chip, and the 5V step-down circuit to 3.3V is composed of a REG-1117 chip.

[0008] Preferably, the protection circuit module includes a reverse connection protection circuit, an overheat protection circuit, and an overcurrent protection circuit. The reverse connection protection circuit is composed of Schottky diodes, the overheat protection circuit is composed of fuses, and the overcurrent protection circuit is composed of PW2312 step-down chips.

[0009] Preferably, the universal interface module includes a six-channel controllable 12V voltage output circuit composed of MOS transistors and an interface circuit composed of 13 I / O ports. The 13 I / O ports can be changed to different communication interfaces or configured as commonly used I / O ports to control non-communication control devices on the vehicle.

[0010] Preferably, the communication interface module includes two CAN communication interfaces, one 485 interface, one IBUS remote control communication interface, and 13 IO interfaces. The 485 interface communicates with the vehicle's sensors, and the 13 IO interfaces can be expanded through software configuration.

[0011] Furthermore, each of the two CAN communication interfaces is equipped with a control switch, which is used to control the resistance on both sides of the matching CAN bus to remain at 120Ω.

[0012] Furthermore, the communication interface module also communicates with external ultrasonic radar and reversing radar via an RS485 bus.

[0013] Preferably, the control system module includes an STM32F105RBT6 microcontroller, which includes a manual remote control switching control system, a remote control control system, an unmanned driving control system protocol, and a remote controller.

[0014] Furthermore, the control system module periodically checks the vehicle control signal through software. If no control signal is received within a set time, the vehicle will be stopped to achieve the effect of loss of control protection.

[0015] Preferably, the general interface module, the communication interface module, and the external power interface module are all led out through a 39P automotive connector.

[0016] A driving mode switching and runaway protection system based on vehicle VCU control is disclosed. This system uses a step-down circuit module to control the voltage output, reducing the input voltage to the operating range of other modules. A protection circuit module provides reverse connection protection, overheat protection, and overcurrent protection. A universal interface module provides interfaces, and the I / O interface can be configured to different communication interfaces via software. The communication interface module uses dual CAN communication interfaces to ensure stability even when both CAN bus extended frames and standard frames are present simultaneously. The control system module switches between manual driving, remote control, and autonomous driving control, overcoming the shortcomings of traditional VCUs. This VCU truly achieves the effect of controlling the entire vehicle with a single VCU.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: Two CAN buses are brought out on the VCU for control. To prevent data instability caused by the simultaneous presence of extended and standard CAN bus frames, the VCU has two CAN bus routes: one standard frame CAN bus and one extended frame bus. This solves the problem of excessive data processing on a single CAN communication interface due to too many CAN communication devices in the vehicle, and also addresses the instability caused by the simultaneous presence of standard and extended frames in CAN communication. The control system within the vehicle VCU includes an STM32F105RBT6 microcontroller, encompassing a manual / remote control system, a remote control system, an autonomous driving control system protocol, and a remote controller. By periodically checking the vehicle control signals in the software, if no control signal is received within a set time, the vehicle will be stopped to achieve a runaway protection effect. This invention's VCU brings out the necessary communication interface and provides control power pins for vehicle lighting control. In addition, corresponding work has been done on runaway protection, addressing the shortcomings of traditional VCUs in these aspects. This VCU truly achieves the effect of controlling the entire vehicle with a single VCU. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments or examples of this application, the accompanying drawings used in the embodiments or examples will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other drawings can be obtained according to these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the 12-30V to 5V circuit in the step-down circuit module of the present invention; Figure 2 This is a schematic diagram of the step-down circuit module of the present invention, which reduces the voltage from 5V to 3.3V. Figure 3 This is a schematic diagram of the first circuit of the universal interface module of the present invention; Figure 4 This is a schematic diagram of the second circuit of the universal interface module of the present invention; Figure 5 This is a schematic diagram of the 39P automotive connector of the present invention; Figure 6 This is a diagram of the CAN bus matching resistor switch of the present invention; Figure 7 This is a schematic diagram of the system structure of the present invention. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments. Generally, the components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0022] Example 1 like Figure 7 As shown, a driving mode switching and runaway protection system based on vehicle VCU control includes a step-down circuit module, a protection circuit module, a general interface module, a communication interface module, and a control system module. The step-down circuit module is used to control the voltage output and reduce the input voltage to the operating voltage range of other modules. The step-down circuit module includes two circuits: a 12-30V to 5V circuit and a 5V to 3.3V circuit. The 12-30V to 5V circuit uses a PW2312 step-down chip, and the 5V to 3.3V circuit uses a REG-1117 chip.

[0023] The protection circuit module is used for reverse connection protection, overheat protection, and overcurrent protection. The protection circuit module includes a reverse connection protection circuit, an overheat protection circuit, and an overcurrent protection circuit. The reverse connection protection circuit is composed of Schottky diodes, the overheat protection circuit is composed of fuses, and the overcurrent protection circuit is composed of PW2312 step-down chips.

[0024] The general interface module is used to provide an interface. The IO interface can be changed to different communication interfaces through software program configuration. The general interface module includes a six-channel controllable 12V voltage output circuit composed of MOS transistors and an interface circuit composed of 13 IO ports. The 13 IO ports can be changed to different communication interfaces, or they can be configured as common IO ports to control non-communication control devices on the vehicle.

[0025] The communication interface module employs dual CAN communication interfaces to ensure stability even when both extended and standard CAN bus frames exist simultaneously. The module includes two CAN communication interfaces, one RS485 interface, one IBUS remote control communication interface, and 13 I / O interfaces. The RS485 interface communicates with vehicle sensors, and the 13 I / O interfaces can be configured via software to expand the communication interface. Each of the two CAN communication interfaces is equipped with a control switch to maintain the resistance on both sides of the matching CAN bus at 120Ω. The communication interface module also communicates with external ultrasonic radar and reversing radar via an RS485 bus. The control system module is used to switch between manual driving, remote control, and unmanned driving. The control system module includes an STM32F105RBT6 microcontroller, which contains a manual / remote control system, a remote control system, an unmanned driving control system protocol, and a remote controller. The control system module periodically checks the vehicle control signal through software. If no control signal is received within a set time, the vehicle will be stopped to achieve the effect of loss of control protection.

[0026] The general interface module, the communication interface module, and the external power interface module are all led out through a 39P automotive connector.

[0027] As described above, in this example, the voltage output is controlled by the step-down circuit module, which reduces the input voltage to the operating voltage range of other modules. The protection circuit module provides reverse connection protection, overheat protection, and overcurrent protection. The general interface module provides an interface, and the IO interface can be changed to different communication interfaces through software configuration. The communication interface module uses a dual CAN communication interface to ensure stability when both the CAN bus extended frame and the standard frame exist simultaneously. The control system module switches between manual driving, remote control, and unmanned driving control.

[0028] Example 2 The step-down circuit includes a circuit that uses a PW2312 step-down chip to step down 12-30V to 5V. Figure 1 As shown; a 5V to 3.3V step-down circuit using the REG-1117 chip. Figure 2 As shown.

[0029] The protection circuit includes: a reverse connection protection circuit composed of Schottky diodes; an overheat protection circuit composed of fuses; and a built-in overcurrent protection using a PW2312 step-down chip.

[0030] The universal interface includes a six-channel controllable 12V voltage output circuit composed of MOSFETs, which solves the problem of needing to connect other controller devices for vehicle lighting control. Figure 3 Figure 4 As shown, the interface circuit consists of 13 I / O ports. This circuit can be configured by software, and the 13 I / O ports can be changed into different communication interfaces to solve the problem of insufficient communication interfaces for the whole vehicle equipment. In addition, the interface circuit can also be configured as a common I / O port to control non-communication control devices on the whole vehicle.

[0031] The communication interface includes: two CAN communication interfaces, which solves the problem of too much data being processed by a single CAN communication interface due to too many CAN communication devices in the vehicle, and also solves the instability caused by the simultaneous existence of standard frames and extended frames in CAN communication; one 485 interface, which can be used to communicate with vehicle sensors; one IBUS remote control communication interface; and the 13 IO channels in the interface circuit can also be expanded through software configuration.

[0032] The communication interface, general interface, and power interface are brought out via a 39P automotive connector. Figure 5 As shown.

[0033] The control system includes: an STM32F105RBT6 microcontroller controller (controller), which contains a manual remote control switching control system, a remote control control system, an unmanned driving control system protocol, and a remote controller.

[0034] Example 3 The technical solution for the vehicle control VCU is as follows: It uses the STM32F105RBT6 chip as the main control chip. This chip has common communication functions such as 5 UARTs and 2 CANs, and uses a 39-pin automotive connector to bring out commonly used control pins and expandable additional function pins. In terms of software, the VCU performs additional periodic checks on the vehicle control data. If a continuous control signal is not received for a certain period, the vehicle will be stopped to achieve a runaway protection effect.

[0035] Since the common control method for drive, steering, and braking in special vehicles is CAN bus control, two CAN buses are brought out on the VCU for control. To prevent data instability caused by the simultaneous presence of extended and standard CAN bus frames, the VCU has two CAN bus routes: one standard frame CAN bus and one extended frame bus. Additionally, two switches are added to the VCU to maintain the resistance on both sides of the matching CAN bus at 120Ω. Addressing the issue that traditional VCUs cannot control lighting, this VCU internally controls the 12V power supply output via MOS to achieve the effect of controlling the entire vehicle's lighting with a single VCU. Furthermore, this VCU has an RS485 bus for communication with external sensors such as ultrasonic radar and reversing radar. Several standard I / O pins are also reserved, which can be configured as other common communication pins, such as UART and SPI.

[0036] The vehicle's VCU periodically checks the vehicle control signals in the software. If no control signal is received within a set time, the vehicle will be stopped to achieve the effect of loss of control protection.

[0037] CAN bus matching resistor switch, such as Figure 6 As shown. PA2 and PA3 can be configured as UART communication pins, PA6 and PA7 can be configured as SPI communication function pins, and CAN1 is the CAN standard frame bus and CAN2 is the CAN extended frame bus.

[0038] The embodiments described above are merely preferred embodiments of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications, improvements, and substitutions without departing from the concept of the present invention, and these all fall within the protection scope of the present invention.

Claims

1. A driving mode switching and runaway protection system based on vehicle VCU control, characterized in that, It includes a step-down circuit module, a protection circuit module, a general interface module, a communication interface module, and a control system module. The step-down circuit module is used to control the voltage output and reduce the input voltage to the voltage range in which other modules operate. The protection circuit module is used for reverse connection protection, overheat protection, and overcurrent protection. The general interface module is used to provide an interface, which can be configured by software program to change the IO interface into different communication interfaces; The communication interface module is used to ensure stability when both the CAN bus extended frame and the standard frame exist simultaneously by employing a dual CAN communication interface. The control system module is used to switch between manual driving, remote control, and unmanned driving.

2. The driving mode switching and runaway protection system based on vehicle VCU control according to claim 1, characterized in that: The step-down circuit module includes two circuits: a 12-30V step-down circuit to 5V and a 5V step-down circuit to 3.3V. The 12-30V step-down circuit to 5V uses a PW2312 step-down chip, and the 5V step-down circuit to 3.3V uses a REG-1117 chip.

3. The driving mode switching and runaway protection system based on vehicle VCU control according to claim 1, characterized in that: The protection circuit module includes a reverse connection protection circuit, an overheat protection circuit, and an overcurrent protection circuit. The reverse connection protection circuit is composed of Schottky diodes, the overheat protection circuit is composed of fuses, and the overcurrent protection circuit is composed of PW2312 step-down chips.

4. The driving mode switching and runaway protection system based on vehicle VCU control according to claim 1, characterized in that: The general interface module includes a six-channel controllable 12V voltage output circuit composed of MOSFETs and an interface circuit composed of 13 I / O ports. The 13 I / O ports can be changed into different communication interfaces or configured as common I / O ports to control non-communication control devices on the vehicle.

5. A driving mode switching and runaway protection system based on vehicle VCU control according to claim 1, characterized in that: The communication interface module includes two CAN communication interfaces, one 485 interface, one IBUS remote control communication interface, and 13 IO interfaces. The 485 interface communicates with the vehicle's sensors, and the 13 IO interfaces can be expanded through software configuration.

6. A driving mode switching and runaway protection system based on vehicle VCU control according to claim 5, characterized in that: The two CAN communication interfaces are each equipped with a control switch. The two control switches are used to control the resistance on both sides of the matching CAN bus to be kept at 120Ω.

7. A driving mode switching and runaway protection system based on vehicle VCU control according to claim 5, characterized in that: The communication interface module also communicates with external ultrasonic radar and reversing radar via an RS485 bus.

8. A driving mode switching and runaway protection system based on vehicle VCU control according to claim 1, characterized in that: The control system module includes an STM32F105RBT6 microcontroller, which contains a manual / remote control system, a remote control system, an unmanned driving control system protocol, and a remote controller.

9. A driving mode switching and runaway protection system based on vehicle VCU control according to claim 8, characterized in that: The control system module periodically checks the vehicle control signal through software. If no control signal is received within a set time, the vehicle will be stopped to achieve the effect of loss of control protection.

10. A driving mode switching and runaway protection system based on vehicle VCU control according to claim 1, characterized in that: The general interface module, the communication interface module, and the external power interface module are all led out through a 39P automotive connector.

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