A method and system architecture for detecting subsystem power failure

Abstract

The present invention discloses a method and system architecture for detecting subsystem power failures. The method samples the power supply voltage at the input end of a power supply module through a power detection module, identifies the sampled power supply voltage value through a microprocessor, and attempts to communicate with the subsystem sensing module through a data sending module and a data receiving module when the power supply voltage is determined to be within a normal range. If all sensors do not respond to the microprocessor's instructions, the microprocessor queries the status of the data receiving module at that end and determines that the power supply fault exists in the subsystem when the level state of the receiving port of the data receiving module is not constantly high or constantly low. The present invention detects subsystem power failures indirectly through the communication signal receiving port between the controller and the subsystem, achieving subsystem power failure detection at the system level, reducing hardware costs and improving system reliability.

Description

Technical Field

[0001] The present invention belongs to the technical field of automotive electronic product subsystem power failure detection, and in particular relates to a method and system architecture for detecting subsystem power failure. Background Art

[0002] The system architecture of most automotive electronic products currently on the market consists of three main parts, namely the perception module, the control module and the execution module. As a subsystem of the entire system, the perception module is often powered by the control module (i.e., the controller) through the power supply module, and the control module monitors whether its power supply is normal, such as detecting whether the power supply of the perception module is short-circuited to the ground line. The monitoring of the subsystem power supply is usually achieved by using a sensor power detection module connected to the power supply module (such as Figure 3 、 4 As shown in the figure, the input voltage is divided down using resistors before being fed into the AD port of the controller's microprocessor module. In addition to the resistors used in the voltage divider circuit, capacitors are often required for filtering, rectifier diodes for reverse voltage, and Zener diodes for overvoltage protection. These electronic components incur material costs and take up considerable layout space during PCB circuit design. Furthermore, more circuit components mean a greater potential for failure of the entire system. For example, failure of the overvoltage protection diode (Zener voltage too low) can cause the entire module to fail. This means that even though there is no subsystem power supply fault, a fault in the circuit element used to detect sensor power supply faults may cause the system to mistakenly determine that a subsystem power supply fault exists. Detecting subsystem power supply faults through other means would significantly reduce product costs and minimize random hardware failures across the entire system. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a method and system architecture for detecting a subsystem power failure, so as to detect a subsystem power failure, reduce hardware costs and improve system reliability.

[0004] In order to achieve the above technical effects, the technical solution adopted by the present invention is:

[0005] A method for detecting a subsystem power failure, characterized by comprising the following detection steps:

[0006] S1. When the system is running, the power detection module samples the power voltage at the input of the power supply module and transmits the sampled information to the microprocessor;

[0007] S2. The microprocessor identifies the power supply voltage value and determines whether the power supply voltage is within the normal range;

[0008] S3 determines that the power supply voltage is within the normal range, and the microprocessor attempts to communicate with the subsystem perception module through the data sending module and the data receiving module;

[0009] S4. All sensors of the perception module have no response to the microprocessor command. The microprocessor queries the status of the data receiving module at the end and confirms the level status of the receiving port of the data receiving module.

[0010] S5. The microprocessor confirms that the level of the receiving port of the data receiving module is not constant high, nor constant low, and determines that the subsystem has a power failure;

[0011] S6. After determining that a power failure exists in the subsystem, the microprocessor communicates with the vehicle body unit through the communication module, feeds back the power failure information to the host computer, and the host computer presents the power failure information to the user through the display system.

[0012] A system architecture for detecting subsystem power failures, characterized by including a control module and a perception module, wherein the control module is a controller and is provided with a microprocessor, a power detection module, a power supply module, a data sending module, and a data receiving module; the control module is connected to the perception module via the power supply module for supplying power to the perception module, the power detection module is connected to the power line at the input end of the power supply module, and the other end of the power detection module is connected to the microprocessor, the power detection module is used to sample the power supply voltage at the input end of the power supply module and send the sampled information to the microprocessor, and the microprocessor is communicated with the perception module via the transceiver ports of the data sending module and the data receiving module, respectively.

[0013] Furthermore, the controller is also provided with a power supply module, one end of which is connected to the power line of the input end of the power supply module, and the other end is connected to the microprocessor, for converting the power supply voltage and then supplying power to the microprocessor.

[0014] Furthermore, the controller is further provided with a communication module, one end of the communication module is connected to the microprocessor, and the other end is communicatively connected to the vehicle body unit via a communication port.

[0015] Furthermore, the power detection module is a 12V power detection module.

[0016] Furthermore, the power supply module is a 12V to 5V power supply module.

[0017] Furthermore, the communication connection between the control module and the perception module adopts LIN or TCI communication connection.

[0018] Furthermore, the sensing module is connected to a ground wire.

[0019] Furthermore, the perception module is a sensor.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The present invention can systematically detect subsystem power failures. Compared with the prior art that realizes subsystem power failure through a sensor power detection module, it can effectively reduce the setting of electronic components, reduce product hardware costs, and increase the freedom of PCB layout. At the same time, it also reduces the probability of random hardware failure of the system and improves the reliability of system operation.

[0022] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the ultrasonic reversing radar (one of the automotive electronic products well-known to the public, the perception module of the ultrasonic reversing radar system is an ultrasonic sensor, hereinafter referred to as the sensor, and the control module is the controller) is taken as an example, and the present invention is further described in detail in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A logic diagram of a method for detecting a subsystem power failure according to an embodiment of the present invention;

[0024] Figure 2 A system architecture diagram of a detection subsystem power failure according to an embodiment of the present invention;

[0025] Figure 3 A diagram showing the system architecture of a conventional detection subsystem power failure;

[0026] Figure 4 This is a diagram of a common implementation of a sensor power detection module in a control module in the prior art. DETAILED DESCRIPTION

[0027] Example 1:

[0028] A system architecture for detecting subsystem power failures, such as Figure 2As shown, the system architecture includes a control module and a sensing module connected to the control module. The control module is the controller, and the sensing module is the sensor. The controller includes a microprocessor, a 12V power detection module, a 12V to 5V power module, a sensor power supply module, a sensor data transmission module, a sensor data reception module, and a communication module. The controller is connected to the sensor through the sensor power supply module to power the sensor, and the other end of the sensor is grounded via a ground wire. One end of the power module is connected to the power line at the input of the sensor power supply module, and the other end is connected to the microprocessor to convert the power supply voltage and power the microprocessor. The 12V power detection module is connected to the power line at the input of the sensor power supply module, and the other end is connected to the microprocessor to sample the power supply voltage at the input of the sensor power supply module and transmit the sampled information to the microprocessor. The microprocessor communicates with the sensor through the transceiver ports of the sensor data transmission module and the sensor data reception module, respectively. This communication connection can adopt, but is not limited to, LIN or TCI communication. The microprocessor is also connected to the communication module, communicating with the vehicle body unit through a communication port.

[0029] Example 2:

[0030] A method for detecting a subsystem power failure, such as Figure 1-2 As shown, the method includes the following detection steps:

[0031] S1. System operation: The 12V power detection module samples the input power voltage of the sensor power supply module that powers the subsystem and transmits the sampling information to the microprocessor;

[0032] S2. The microprocessor identifies the power supply voltage value and determines whether the power supply voltage is within the normal range. The normal range here means that the identified power supply voltage value is within the normal operating range of the system and also meets the voltage range required for the fault detection function to work.

[0033] S3. When it is determined that the power supply voltage is within the normal range, the microprocessor attempts to communicate with each sensor through the sensor data sending module and the sensor data receiving module;

[0034] S4. When all sensors have no response to the microprocessor instruction, the microprocessor queries the status of the sensor data receiving module at the end to confirm the level status of the receiving port of the sensor data receiving module;

[0035] S5. When the microprocessor confirms that the level state of the receiving port of the sensor data receiving module is not constant high or constant low, it can be determined that the subsystem has a power failure;

[0036] S6. After determining that a power failure exists in the subsystem, the microprocessor communicates with the vehicle body unit through the communication module, feeds back the power failure information to the host computer, and the host computer presents the power failure information to the user or maintenance personnel through the display system.

[0037] The sensors in step S3 and all sensors in step S4 refer to all sensors connected to the output end of the sensor power supply module in the system controller.

[0038] The present invention uses the communication signal receiving port between the controller and the subsystem to indirectly detect subsystem power failures at the system level, without the need for a sensor power detection module and an AD port. This can reduce electronic components, effectively lower product hardware costs, increase the freedom of PCB layout, reduce the probability of random hardware failures in the system, and improve system reliability.

[0039] The present invention is not limited to the above-mentioned specific implementation manners. For ordinary technicians in this field, various changes made based on the above-mentioned conception without creative work are all within the scope of protection of the present invention.

Claims

1. A method for detecting a subsystem power failure, characterized in that: The detection steps include: S1. When the system is running, the power detection module samples the power voltage at the input of the power supply module and transmits the sampled information to the microprocessor; S2. The microprocessor identifies the power supply voltage value and determines whether the power supply voltage is within the normal range; S3 determines that the power supply voltage is within the normal range, and the microprocessor attempts to communicate with the subsystem perception module through the data sending module and the data receiving module; S4. All sensors of the perception module have no response to the microprocessor command. The microprocessor queries the status of the data receiving module at the end and confirms the level status of the receiving port of the data receiving module. S5. When the microprocessor confirms that the level state of the receiving port of the data receiving module is neither constant high nor constant low, it determines that there is a power failure in the subsystem.

2. The method for detecting a subsystem power failure according to claim 1, wherein: The following steps are also included: S6. After determining that a power failure exists in the subsystem, the microprocessor communicates with the vehicle body unit through the communication module and feeds back the power failure information to the host computer, which then presents the power failure information to the user through the display system.

3. A system architecture for detecting subsystem power failures for implementing the method of claim 1, characterized in that: The system comprises a control module and a perception module. The control module is a controller which is provided with a microprocessor, a power detection module, a power supply module, a data sending module and a data receiving module. The control module is connected to the perception module via the power supply module for supplying power to the perception module. The power detection module is connected to the power line at the input end of the power supply module. The other end of the power detection module is connected to the microprocessor. The power detection module is used to sample the power voltage at the input end of the power supply module and send the sampling information to the microprocessor. The microprocessor is communicated with the perception module via the transceiver ports of the data sending module and the data receiving module respectively. The microprocessor is used to determine that there is a power failure in the subsystem when it is determined that the power voltage is normal and all sensors of the perception module have no response to the microprocessor instructions and when it is confirmed according to the query that the level state of the receiving port of the data receiving module is neither constantly high nor constantly low.

4. The system architecture for detecting subsystem power failure according to claim 3, characterized in that: The controller is further provided with a power supply module, one end of which is connected to the power line of the input end of the power supply module, and the other end is connected to the microprocessor, and is used to power the microprocessor after converting the power supply voltage.

5. The system architecture for detecting subsystem power failure according to claim 3, characterized in that: The controller is further provided with a communication module, one end of which is connected to the microprocessor, and the other end of which is communicatively connected to the vehicle body unit via a communication port.

6. The system architecture for detecting subsystem power failure according to claim 3, characterized in that: The power detection module is a 12V power detection module.

7. The system architecture for detecting subsystem power failure according to claim 4, characterized in that: The power supply module is a 12V to 5V power supply module.

8. The system architecture for detecting subsystem power failure according to claim 3, characterized in that: The communication connection between the control module and the perception module adopts LIN or TCI communication connection.

9. The system architecture for detecting subsystem power failure according to claim 3, characterized in that: The sensing module is connected to a ground wire.

10. The system architecture for detecting subsystem power failure according to claim 3, characterized in that: The perception module is a sensor.

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