Vehicle cabin system

Abstract

The utility model provides a vehicle cabin system, and relates to the technical field of vehicles, the vehicle cabin system comprises a system power supply, a first switch module, a second switch module, a detection module, a system-on-chip, a control unit and a vehicle load assembly; when a sleep instruction is received, the system power supply supplies power to the system-on-chip through the second switch module and the detection module, so that the detection module detects whether the vehicle cabin system is in an STR mode or not, when the vehicle cabin system is not in the STR mode, the vehicle cabin system is controlled to be powered off, and when a sleep relieving instruction is received, the system-on-chip is controlled to be powered off. And power is directly supplied to a vehicle cabin system. Whether the vehicle cabin system is in the STR mode or not is detected in advance when the vehicle is in the power-off state, the vehicle cabin system is powered off in advance when it is detected that the vehicle cabin system is not in the STR mode, and the starting duration of the vehicle cabin system in the process that the vehicle is powered on again is shortened.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and more specifically, to a vehicle cockpit system in the field of vehicles. Background Technology

[0002] To avoid reloading the integrated functions of the vehicle's cockpit system every time the vehicle starts, a sleep mode (also known as suspend to RAM (STR) mode) is introduced. After the vehicle is powered off, the cockpit system enters sleep mode. If the system is unexpectedly awakened from sleep mode, upon powering back on, the Micro Controller Unit (MCU) is powered on first. During communication between the MCU and the System-on-Chip (SOC) in the cockpit system, if the MCU detects that the system is not in STR mode, it will power off the system first to avoid damaging it. After power-off, the system will power on again and reload its integrated functions before it can function normally. As can be seen, this startup process is relatively cumbersome, resulting in a longer startup time for the vehicle's cockpit system. Utility Model Content

[0003] This application provides a vehicle cockpit system that detects whether the vehicle cockpit system is in STR mode when the vehicle is powered off. If the vehicle cockpit system is not in STR mode, the system is powered off. In other words, the system detects whether the vehicle cockpit system is in STR mode in advance when the vehicle is powered off, and if it is detected that the system is not in STR mode, the system is powered off in advance. When the vehicle is powered on again, the system can be powered on directly. This reduces the need to detect whether the system is in STR mode during the power-on process and to power off the system if it is not in STR mode, thereby shortening the startup time of the vehicle cockpit system.

[0004] In a first aspect, a vehicle cockpit system is provided, comprising: a system power supply, a first switch module, a second switch module, a detection module, a system-on-a-chip (SoC), a control unit, and vehicle load components; the first switch module and the second switch module are electrically connected to the system power supply, the first switch module is electrically connected to the SoC, the second switch module is electrically connected to the detection module, the detection module is signal-connected to the control unit, the detection module is electrically connected to the SoC, the SoC is signal-connected to the vehicle load components, the control unit is communicatively connected to the SoC, and the first switch module and the second switch module are signal-connected to the control unit; the control unit is used to receive... In the event of a sleep command, the system controls the second switch module to close and the first switch module to open. The detection module detects the input current of the system-on-a-chip when the first switch module is open and the second switch module is closed, and sends an electrical signal to the control unit when the input current exceeds a current threshold. Upon receiving the electrical signal, the control unit disconnects the connection between the system power supply and the system-on-a-chip. The control unit also controls the first switch module to close and the second switch module to open upon receiving a sleep deactivation command. The system-on-a-chip controls the vehicle load components when the first switch module is closed and the second switch module is open.

[0005] In this embodiment, in the vehicle cockpit system, upon receiving a sleep command, the control unit controls the second switch module to close and the first switch module to open. That is, after the vehicle is powered off, the vehicle cockpit system enters STR mode. By controlling the second switch module to close and the first switch module to open, the system power supply powers the system-on-a-chip (SoC) through the second switch module and the detection module. This allows the detection module to detect the input current to the SoC when the vehicle cockpit system enters STR mode. When the first switch module is open and the second switch module is closed, the detection module detects the input current of the SoC. If the input current is greater than a current threshold, it sends an electrical signal to the control unit. If the input current is greater than the current threshold, it indicates that the vehicle cockpit system is not in STR mode and the power supply to the SoC needs to be cut off. Therefore, it sends an electrical signal to the control unit. Upon receiving the electrical signal, the control unit disconnects the system power supply from the SoC; that is, it controls the vehicle cockpit system to shut down. Upon receiving a sleep deactivation command, the control unit also controls the first switch module to close and the second switch module to open. That is, when the vehicle is powered off, if the system is detected not in STR mode, a power-off operation is performed. When the vehicle restarts, the first switch module closes and the second switch module opens, allowing the system power to supply power to the system-on-a-chip (SoC) through the first switch module. The SoC then operates normally, controlling the vehicle's load components when both switches are closed, thus enabling direct startup of the SoC. When the vehicle is powered off, the detection module monitors the input current to the SoC. If the input current exceeds a current threshold, it determines that the SoC is not in STR mode, thus detecting the STR mode status of the SoC. If the SoC is not in STR mode, the power supply to the SoC is cut off, i.e., a power-off operation is performed. Upon receiving a sleep deactivation command, i.e., when the vehicle is powered on again, power is directly supplied to the SoC. This achieves the detection of whether the SoC is in STR mode when the vehicle is powered off, and the direct power supply to the SoC when it is not in STR mode. In STR mode, the vehicle's cockpit system is powered off. That is, when the vehicle is powered down, the system checks whether it is in STR mode in advance. If it is not in STR mode, the system is powered off in advance. When the vehicle is powered on again, the system can be powered on directly. This reduces the need to check whether the system is in STR mode during the power-on process and to power off the system if it is not in STR mode, thus shortening the startup time of the vehicle's cockpit system.

[0006] In conjunction with the first aspect, in some possible implementations, the first switch module is a relay or a switch circuit, and the second switch module is a relay or a switch circuit.

[0007] In conjunction with the first aspect and the above implementations, in some possible implementations, the switching circuit includes: a MOSFET, a transistor, a resistive element, a first capacitor, a second capacitor, a third capacitor, and a fourth capacitor; the resistive element includes a first resistor and a second resistor; the gate of the MOSFET is connected to the collector of the transistor through the third resistor; the emitter of the transistor is grounded; one end of the first resistor is connected between the collector of the transistor and the third resistor; the other end of the first resistor is connected to the source of the MOSFET; one end of the second resistor is connected to the base of the transistor; one end of the first capacitor is connected to the source of the MOSFET; the other end of the first capacitor is grounded; one end of the second capacitor is connected to the source of the MOSFET; the other end of the second capacitor is connected between the gate of the MOSFET and the third resistor; one end of the third capacitor is connected to the drain of the MOSFET; the other end of the third capacitor is grounded; one end of the fourth capacitor is connected between the base of the transistor and the second resistor; the other end of the fourth capacitor is grounded; the source of the MOSFET is the switching circuit. The first terminal of the first switch module is connected to the system power supply, the second terminal of the second switch module is connected to the control unit, and the third terminal of the switch module is connected to the system-on-a-chip. The second terminal of the second switch module is also connected to the detection module. When the first switch module is a switch circuit, the first terminal of the switch circuit is connected to the system power supply, the second terminal of the switch circuit is connected to the control unit, and the third terminal of the switch circuit is connected to the detection module. The control unit, upon receiving a sleep command, sends a low level to the second terminal of the second switch module to control the second switch module to close, and sends a high level to the second terminal of the first switch module to control the first switch module to open. The control unit is also used to, upon receiving a sleep de-compression command, send a low level to the second terminal of the first switch module to control the first switch module to close, and send a high level to the second terminal of the second switch module to control the first switch module to open.

[0008] In conjunction with the first aspect and the above implementations, in some possible implementations, the relay includes a first coil pin, a second coil pin, a first contact pin, and a second contact pin; when the first switch module is a relay, the first coil pin of the first switch module is connected to the control unit, the second coil pin of the first switch module is grounded, the first contact pin of the first switch module is connected to the system-on-a-chip, and the second contact pin of the first switch module is connected to the system power supply; when the second switch module is a relay, the first coil pin of the second switch module is connected to the control unit, the second coil pin of the second switch module is grounded, the first contact pin of the second switch module is connected to the detection module, and the second contact pin of the second switch module is connected to the system power supply; the control unit is used to send a high level to the first coil pin of the second switch module to control the second switch module to close, and send a low level to the first coil pin of the first switch module to control the first switch module to open, upon receiving a sleep command; the control unit is also used to send a high level to the first coil pin of the first switch module to control the first switch module to close, and send a low level to the first coil pin of the second switch module to control the second switch module to open, upon receiving a sleep de-compression command.

[0009] In conjunction with the first aspect and the above implementation methods, in some possible implementations, the first switching module is a switching circuit, which includes: a MOSFET, a transistor, a resistive element, a first capacitor, a second capacitor, a third capacitor, and a fourth capacitor; the resistive element includes a first resistor and a second resistor; the gate of the MOSFET is connected to the collector of the transistor through the third resistor; the emitter of the transistor is grounded; one end of the first resistor is connected between the collector of the transistor and the third resistor; the other end of the first resistor is connected to the source of the MOSFET; one end of the second resistor is connected to the base of the transistor; one end of the first capacitor is connected to the source of the MOSFET; the other end of the first capacitor is grounded; one end of the second capacitor is connected to the source of the MOSFET; the other end of the second capacitor is connected between the gate of the MOSFET and the third resistor; one end of the third capacitor is connected to the drain of the MOSFET; the other end of the third capacitor is grounded; one end of the fourth capacitor is connected between the base of the transistor and the second resistor; the other end of the fourth capacitor is grounded; the source of the MOSFET is the first terminal of the switching circuit; the other end of the second resistor is the... The second terminal of the switching circuit has the drain of the MOS transistor as its third terminal. The first terminal of the switching circuit is connected to the system power supply, the second terminal is connected to the control unit, and the third terminal is connected to the system-on-a-chip. The second switching module is a relay, which includes a first coil pin, a second coil pin, a first contact pin, and a second contact pin. The first coil pin of the second switching module is connected to the control unit, the second coil pin is grounded, the first contact pin is connected to the detection module, and the second contact pin is connected to the system power supply. The control unit is used to send a high level to the first coil pin of the second switching module to control the second switching module to close, and to send a high level to the second terminal of the first switching module to control the first switching module to open, when a sleep command is received. The control unit is also used to send a low level to the second terminal of the first switching module to control the first switching module to close, and to send a low level to the first coil pin of the second switching module to control the second switching module to open, when a sleep release command is received.

[0010] In combination with the first aspect and the above implementation methods, in some possible implementation methods, the detection module is a high-side chip or a detection circuit.

[0011] In conjunction with the first aspect and the above implementations, in some possible implementations, the detection circuit includes a detection resistor, an amplification circuit, and a voltage comparison circuit; the amplification circuit includes a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, and an operational amplifier; the voltage comparison circuit includes a voltage comparator, an eighth resistor, and a ninth resistor; one end of the fifth resistor and the second switching module are respectively connected to one end of the detection resistor, the system-on-a-chip and one end of the seventh resistor are respectively connected to the other end of the detection resistor, the other end of the fifth resistor and one end of the fourth resistor are respectively connected to the positive input terminal of the operational amplifier, and the fourth resistor... The other end is grounded. The other end of the seventh resistor and one end of the sixth resistor are respectively connected to the negative input terminal of the operational amplifier. The output terminal of the operational amplifier is connected to the positive input terminal of the voltage comparator. The other end of the sixth resistor is connected between the output terminal of the operational amplifier and the positive input terminal of the voltage comparator. The negative input terminal of the voltage comparator is connected to one end of the eighth resistor. The other end of the eighth resistor is connected to a reference voltage. One end of the ninth resistor is connected between the negative input terminal of the voltage comparator and the eighth resistor. The other end of the ninth resistor is grounded. The output terminal of the voltage comparator is connected to the control unit.

[0012] In conjunction with the first aspect and the above implementation, in some possible implementations, the control unit is further configured to control the second switch module to disconnect upon receiving the electrical signal.

[0013] In combination with the first aspect and the above implementation methods, in some possible implementation methods, the vehicle cockpit system further includes: a power management module, wherein the first switch module and the detection module are respectively connected to one end of the power management module, and the other end of the power management module is connected to the system-on-a-chip.

[0014] In combination with the first aspect and the above implementation methods, in some possible implementations, the power management module includes a voltage converter and a third switch module. The first switch module and the detection module are respectively connected to one end of the voltage converter, and the other end of the voltage converter is connected to one end of the third switch module. The control unit and the system-on-a-chip are respectively connected to the other end of the third switch module. When one of the first switch module and the second switch module is closed, the third switch module is closed. The control unit is also used to control the third switch module to open when the electrical signal is received. Attached Figure Description

[0015] Figure 1 This paper shows a schematic diagram of the structure of a vehicle cockpit system provided in an embodiment of this application;

[0016] Figure 2 A schematic diagram of another vehicle cockpit system provided in an embodiment of this application is shown;

[0017] Figure 3 This illustration shows a timing diagram of a vehicle cockpit system entering STR mode according to an embodiment of this application;

[0018] Figure 4 This illustration shows a control timing diagram of a vehicle cockpit system not in STR mode and a startup timing diagram of the cockpit system according to an embodiment of this application.

[0019] Figure 5 A schematic diagram of a switching circuit provided in an embodiment of this application is shown;

[0020] Figure 6 A schematic diagram of a relay provided in an embodiment of this application is shown;

[0021] Figure 7 A schematic diagram of a detection circuit provided in an embodiment of this application is shown. Detailed Implementation

[0022] The technical solutions in this application will be clearly and thoroughly described below with reference to the accompanying drawings. In the description of the embodiments of this application, unless otherwise stated, " / " means "or," for example, A / B can mean A or B. "And / or" in the text is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Furthermore, in the description of the embodiments of this application, "multiple" refers to two or more than two.

[0023] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0024] To avoid reloading the integrated functions of the vehicle's cockpit system every time the vehicle starts, a sleep mode (also known as suspend to RAM (STR) mode) is introduced. After the vehicle is powered off, the cockpit system enters sleep mode. If the system is unexpectedly awakened from sleep mode, upon powering back on, the Micro Controller Unit (MCU) is powered on first. During communication between the MCU and the System-on-Chip (SOC) in the cockpit system, if the MCU detects that the system is not in STR mode, it will power off the system first to avoid damaging it. After power-off, the system will power on again and reload its integrated functions before it can function normally. As can be seen, this startup process is relatively cumbersome, resulting in a longer startup time for the vehicle's cockpit system.

[0025] Based on this, this application provides a vehicle cockpit system that detects whether the vehicle cockpit system is in STR mode by detecting the input current of the system-on-a-chip (SoC) when the vehicle is powered off. If the input current of the SoC exceeds a current threshold, it is determined that the vehicle cockpit system is not in STR mode, and the vehicle cockpit system is powered off. When the vehicle restarts, the vehicle cockpit system restarts. The detection process of whether the vehicle cockpit system is in STR mode and the process of controlling the power-off of the vehicle cockpit system when it is not in STR mode are completed in advance during the vehicle power-off process. During the vehicle power-on process, the process of first powering on the MCU in the vehicle cockpit system, detecting whether the vehicle cockpit system is in STR mode when the MCU establishes communication with the SOC in the vehicle cockpit system, and controlling the power-off of the vehicle cockpit system when it is detected that the vehicle cockpit system is not in STR mode is omitted, thereby shortening the vehicle cockpit startup time when the vehicle cockpit system is not in STR mode.

[0026] The following is an embodiment of a vehicle cockpit system provided in this application specification.

[0027] Figure 1 A schematic diagram of a vehicle cockpit system provided in an embodiment of this application is shown, such as... Figure 1As shown, the vehicle cockpit system 100 provided in this embodiment includes: a system power supply 110, a first switch module 120, a second switch module 130, a detection module 140, a system-on-a-chip 150, a control unit 160, and a vehicle load component 170; the first switch module 120 and the second switch module 130 are electrically connected to the system power supply 110, the first switch module 120 is electrically connected to the system-on-a-chip 150, the second switch module 130 is electrically connected to the detection module 140, the detection module 140 is signal-connected to the control unit 160, the detection module 140 is electrically connected to the system-on-a-chip 150, the system-on-a-chip 150 is signal-connected to the vehicle load component 170, the control unit 160 is communicatively connected to the system-on-a-chip 150, and the first switch module 120 and the second switch module 130 are signal-connected to the control unit 160. Figure 1 (Not shown in the image); Control unit 160 is used to control the second switch module 130 to close and the first switch module 120 to open when a sleep command is received; Detection module 140 is used to detect the input current of system-on-a-chip 150 when the first switch module 120 is open and the second switch module 130 is closed, and send an electrical signal to control unit 160 when the input current is greater than a current threshold; Control unit 160 is used to disconnect the connection between system power supply 110 and system-on-a-chip 150 when an electrical signal is received; Control unit 160 is also used to control the first switch module 120 to close and the second switch module 130 to open when a sleep command is received; System-on-a-chip 150 is used to control vehicle load component 170 when the first switch module 120 is closed and the second switch module 130 is open.

[0028] The first switch module 120 and the second switch module 130 are controlled by the control unit 160. When the vehicle cockpit system 100 is working normally, the first switch module 120 is closed and the second switch module 130 is open. The system power supply 110 supplies power to the system-on-a-chip 150 through the first switch module 120. Figure 2 This illustration shows a structural diagram of another vehicle cockpit system provided in an embodiment of this application. When the control unit 160 receives a sleep command sent by the vehicle via CAN, i.e., a power-down command, the vehicle cockpit system 100 will execute the process of entering STR mode, as follows: Figure 3 As shown, Figure 3This diagram illustrates the timing of a vehicle cockpit system entering STR mode according to an embodiment of this application. After receiving a sleep command from the vehicle (which may be a vehicle power-off command), the control unit 160 sends a command to the system-on-a-chip 150 to enter STR mode. The control unit 160 also sends a shutdown command to the external power supply 190. The control unit 160 and the external power supply 190 are connected by a signal. Before the vehicle cockpit system 100 enters STR mode, the system-on-a-chip 150 sends a feedback command to the control unit 160 to enter STR mode. After receiving the feedback command to enter STR mode, the control unit 160 controls the second switch module 130 to close, controls the first switch module 120 to open, and enters deep sleep mode itself. The vehicle cockpit system then enters STR mode. When the vehicle cockpit system enters STR mode, the system power supply 110 supplies power to the system-on-a-chip 150 through the second switching module 130 and the detection module 140. Since the system-on-a-chip 150 needs to hold a memory snapshot of the current state of the vehicle cockpit system 100, it requires a small amount of power to maintain the memory data. The detection module 140 detects the input current to the system-on-a-chip 150. That is, when the vehicle cockpit system enters STR mode, the input current to the system-on-a-chip 150 is detected to determine whether the vehicle cockpit system is in STR mode. When the vehicle cockpit system 100 is not in the normal state of STR mode, the power consumption of the system-on-a-chip 150 will be greater than the power consumption required only to hold a memory snapshot of the current state of the vehicle cockpit system 100. In other words, when the detection module 140 detects that the input current to the system-on-a-chip 150 is greater than the current threshold, it indicates that the vehicle cockpit system is not in STR mode. Figure 4 As shown, Figure 4The diagram illustrates the control timing of a vehicle cockpit system not in STR mode and the startup timing of the cockpit system according to an embodiment of this application. When the detection module 140 detects that the input current of the input system-on-a-chip 150 is greater than the current threshold, the detection module 140 sends an electrical signal to the control unit 160, causing the control unit 160 to wake up from deep sleep mode. After receiving the electrical signal, the control unit 160 cuts off the power supply to the system-on-a-chip 150. That is, when the vehicle cockpit system is not in STR mode, the control unit 160 performs a power-off operation on the vehicle cockpit system, and then the control unit 160 re-enters deep sleep mode. When the control unit 160 receives the sleep de-sleep command sent by the vehicle via CAN signal, the vehicle is powered on again. The control unit 160 controls the first switch module 120 to close and the second switch module 130 to open. The system power supply 110 supplies power to the system-on-a-chip 150 through the first switch module 120, enabling the system-on-a-chip 150 to start and allowing the vehicle cabin system to operate normally. The system-on-a-chip 150 controls the vehicle load components 170, meaning the vehicle cabin system 100 is directly restarted. It also controls the external power supply 190 to turn on. The external power supply 190 supplies power to the vehicle load components 170. The system power supply 110 and the external power supply 190 are electrically connected. The vehicle load components 170 include the instrument panel, infotainment system, head-up display, and advanced driver assistance system, etc.

[0029] The detection module 140 may be equipped with a fault status pin, which is connected to a specific external interrupt pin of the control unit 160. When the input current of the input system-on-a-chip 150 is detected to be greater than the current threshold, the level of the fault status pin of the detection module 140 changes to wake up the control unit 160 which is in deep sleep mode.

[0030] In the vehicle cockpit system provided in this application, upon receiving a sleep command, the control unit controls the second switch module to close and the first switch module to open. That is, after the vehicle is powered off, the vehicle cockpit system enters STR mode. By controlling the second switch module to close and the first switch module to open, the system power supply powers the system-on-a-chip (SoC) through the second switch module and the detection module. This allows the detection module to detect the input current to the SoC when the vehicle cockpit system enters STR mode. When the first switch module is open and the second switch module is closed, the detection module detects the input current of the SoC. If the input current exceeds a current threshold, it sends an electrical signal to the control unit. If the input current exceeds the current threshold, it indicates that the vehicle cockpit system is not in STR mode and the power supply to the SoC needs to be cut off; therefore, it sends an electrical signal to the control unit. Upon receiving the electrical signal, the control unit disconnects the system power supply from the SoC; that is, it controls the vehicle cockpit system to shut down. Upon receiving a sleep deactivation command, the control unit also controls the first switch module to close and the second switch module to open. That is, when the vehicle is powered off, if the system is detected not in STR mode, a power-off operation is performed. When the vehicle restarts, the first switch module closes and the second switch module opens, allowing the system power to supply power to the system-on-a-chip (SoC) through the first switch module. The SoC then operates normally, controlling the vehicle's load components when both switches are closed, thus enabling direct startup of the SoC. When the vehicle is powered off, the detection module monitors the input current to the SoC. If the input current exceeds a current threshold, it determines that the SoC is not in STR mode, thus detecting the STR mode status of the SoC. If the SoC is not in STR mode, the power supply to the SoC is cut off, i.e., a power-off operation is performed. Upon receiving a sleep deactivation command, i.e., when the vehicle is powered on again, power is directly supplied to the SoC. This achieves the detection of whether the SoC is in STR mode when the vehicle is powered off, and the direct power supply to the SoC when it is not in STR mode. In STR mode, the vehicle's cockpit system is powered off. That is, when the vehicle is powered down, the system checks whether it is in STR mode in advance. If it is not in STR mode, the system is powered off in advance. When the vehicle is powered on again, the system can be powered on directly. This reduces the need to check whether the system is in STR mode during the power-on process and to power off the system if it is not in STR mode, thus shortening the startup time of the vehicle's cockpit system.

[0031] In one possible implementation, the first switch module 120 is a relay or a switch circuit, and the second switch module 130 is a relay or a switch circuit.

[0032] In one possible implementation, Figure 5 The diagram shows a schematic of a switching circuit provided in an embodiment of this application, such as... Figure 5 As shown, the switching circuit includes: a MOSFET M, a transistor N, resistors, a first capacitor C1, a second capacitor C2, a third capacitor C3, and a fourth capacitor C4. The resistors include a first resistor R1 and a second resistor R2. The gate (G) of the MOSFET M is connected to the collector (C) of the transistor N via the third resistor R3. The emitter (E) of the transistor N is grounded. One end of the first resistor R1 is connected between the collector (C) of the transistor N and the third resistor R3, and the other end of the first resistor R1 is connected to the source (S) of the MOSFET M. One end of the second resistor R2 is connected to the collector (C) of the transistor N. The base (B) of transistor N is connected. One end of the first capacitor C1 is connected to the source (S) of MOSFET M, and the other end of the first capacitor C1 is grounded. One end of the second capacitor C2 is connected to the source (S) of MOSFET M, and the other end of the second capacitor C2 is connected between the gate (G) of MOSFET M and the third resistor R3. One end of the third capacitor C3 is connected to the drain (D) of MOSFET M, and the other end of the third capacitor C3 is grounded. One end of the fourth capacitor C4 is connected between the base (B) of transistor N and the second resistor R2, and the other end of the fourth capacitor C4 is grounded. The source of MOSFET M... The source (S) terminal is the first terminal of the switching circuit, the other end of the second resistor R2 is the second terminal of the switching circuit, and the drain (D) terminal of the MOSFET M is the third terminal of the switching circuit. When the first switching module 120 is the switching circuit, the first terminal of the switching circuit is connected to the system power supply 110, the second terminal is connected to the control unit 160, and the third terminal is connected to the system-on-a-chip 150. When the second switching module 130 is the switching circuit, the first terminal of the switching circuit is connected to the system power supply 110, the second terminal is connected to the control unit 160, and the third terminal is connected to the system-on-a-chip 150. The control unit 160 is connected to the detection module 140. Upon receiving a sleep command, the control unit 160 sends a low level to the second terminal of the second switch module 130 to control the second switch module 130 to close, and sends a high level to the second terminal of the first switch module 120 to control the first switch module 120 to open. The control unit 160 is also configured to, upon receiving a sleep deactivation command, send a low level to the second terminal of the first switch module 120 to control the first switch module 120 to close, and send a high level to the second terminal of the second switch module 130 to control the second switch module 130 to open.

[0033] See Figure 5When the switching circuit needs to be closed, the control unit 160 sends a low level to the base (B) of transistor N, turning off the emitter (E) and collector (C) of transistor N. The gate (G) of MOSFET M is pulled high by the first resistor R1 and the second resistor R2, turning off MOSFET M and closing the switching circuit. When the switching circuit needs to be opened, the control unit 160 sends a high level to the base (B) of transistor N, turning on the emitter (E) and collector (C) of transistor N. The gate (G) of MOSFET M is pulled low by the first resistor R1 and the second resistor R2, turning on MOSFET M and opening the switching circuit.

[0034] In one possible implementation, Figure 6 A schematic diagram of a relay provided in an embodiment of this application is shown, such as... Figure 6 As shown, the relay includes a first coil pin Q1, a second coil pin Q2, a first contact pin Q3, and a second contact pin Q4. When the first switch module 120 is a relay, the first coil pin Q1 of the first switch module 120 is connected to the control unit 160, the second coil pin Q2 of the first switch module 120 is grounded, the first contact pin Q3 of the first switch module 120 is connected to the system-on-a-chip 150, and the second contact pin Q4 of the first switch module 120 is connected to the system power supply 110. When the second switch module 130 is a relay, the first coil pin Q1 of the second switch module 130 is connected to the control unit 160, the second coil pin Q2 of the second switch module 130 is grounded, and the second contact pin Q4 of the second switch module 120 is grounded. A contact pin Q3 is connected to the detection module 140, and a second contact pin Q4 of the second switch module 130 is connected to the system power supply 110. The control unit 160, upon receiving a sleep command, sends a high level to the first coil pin Q1 of the second switch module 130 to control the second switch module 130 to close, and sends a low level to the first coil pin Q1 of the first switch module 120 to control the first switch module 120 to open. The control unit 160 is also used, upon receiving a sleep deactivation command, to send a high level to the first coil pin Q1 of the first switch module 120 to control the first switch module 120 to close, and to send a low level to the first coil pin Q1 of the second switch module 130 to control the second switch module 130 to open.

[0035] In one possible implementation, the first switch module 120 can be Figure 5The switching circuit shown includes: a MOSFET M, a transistor N, resistors, a first capacitor C1, a second capacitor C2, a third capacitor C3, and a fourth capacitor C4. The resistors include a first resistor R1 and a second resistor R2. The gate (G) of MOSFET M is connected to the collector (C) of transistor N via the third resistor R3. The emitter (E) of transistor N is grounded. One end of the first resistor R1 is connected between the collector (C) of transistor N and the third resistor R3, and the other end of the first resistor R1 is connected to the source (S) of MOSFET M. One end of the second resistor R2 is connected to the base (B) of transistor N. One end of the first capacitor C1 is connected to the source (S) of MOSFET M, and the other end of the first capacitor C1 is grounded. One end of the second capacitor C2 is connected to the MOSFET... The source (S) of transistor M is connected. The other end of the second capacitor C2 is connected between the gate (G) of transistor M and the third resistor R3. One end of the third capacitor C3 is connected to the drain (D) of transistor M, and the other end of the third capacitor C3 is grounded. One end of the fourth capacitor C4 is connected between the base (B) of transistor N and the second resistor R2, and the other end of the fourth capacitor C4 is grounded. The source (S) of transistor M is the first terminal of the switching circuit. The other end of the second resistor R2 is the second terminal of the switching circuit. The drain (D) of transistor M is the third terminal of the switching circuit. The first terminal of the switching circuit is connected to the system power supply 110. The second terminal of the switching circuit is connected to the control unit 160. The third terminal of the switching circuit is connected to the system-on-a-chip 150. The second switching module 130 can be... Figure 6 The relay shown includes a first coil pin Q1, a second coil pin Q2, a first contact pin Q3, and a second contact pin Q4. The first coil pin Q1 of the second switch module 130 is connected to the control unit 160, the second coil pin Q2 of the second switch module 130 is grounded, the first contact pin Q3 of the second switch module 130 is connected to the detection module 140, and the second contact pin Q4 of the second switch module 130 is connected to the system power supply 110. The control unit 160 is used to send a high level to the first coil pin Q1 of the second switch module 130 to control the second switch module 130 to close when a sleep command is received, and to send a high level to the second terminal of the first switch module 120 to control the first switch module 120 to open. The control unit 160 is also used to send a low level to the second terminal of the first switch module 120 to control the first switch module 120 to close when a sleep release command is received, and to send a low level to the first coil pin Q1 of the second switch module 130 to control the second switch module 130 to open.

[0036] In some embodiments, the first switch module 120 can be Figure 6The relay shown includes a first coil pin Q1, a second coil pin Q2, a first contact pin Q3, and a second contact pin Q4. The first coil pin Q1 of the first switch module 120 is connected to the control unit 160, the second coil pin Q2 of the first switch module 120 is grounded, the first contact pin Q3 of the first switch module 120 is connected to the system-on-a-chip 150, and the second contact pin Q4 of the first switch module 120 is connected to the system power supply 110. The second switch module 130 can be... Figure 5 The switching circuit shown includes a MOSFET M, a transistor N, resistors, a first capacitor C1, a second capacitor C2, a third capacitor C3, and a fourth capacitor C4. The resistors include a first resistor R1 and a second resistor R2. The gate (G) of MOSFET M is connected to the collector (C) of transistor N through the third resistor R3. The emitter (E) of transistor N is grounded. One end of the first resistor R1 is connected between the collector (C) of transistor N and the third resistor R3, and the other end of the first resistor R1 is connected to the source (C) of MOSFET M. The first capacitor C1 is connected to the source (S) of the MOSFET M, and the other end of the first capacitor C1 is grounded. The second capacitor C2 is connected to the source (S) of the MOSFET M, and the other end of the second capacitor C2 is connected between the gate (G) of the MOSFET M and the third resistor R3. The third capacitor C3 is connected to the drain (D) of the MOSFET M, and the other end of the third capacitor C3 is grounded. The fourth capacitor C4 is connected to... The base (B) of transistor N is connected to the second resistor R2, and the other end of the fourth capacitor C4 is grounded. The source (S) of MOSFET M is the first terminal of the switching circuit, the other end of the second resistor R2 is the second terminal of the switching circuit, and the drain (D) of MOSFET M is the third terminal of the switching circuit. The first terminal of the switching circuit is connected to the system power supply 110, the second terminal of the switching circuit is connected to the control unit 160, and the third terminal of the switching circuit is connected to the detection module 140. The control unit 160, upon receiving a sleep command, sends a low level to the first coil pin Q1 of the first switching module 120 to control the first switching module 120 to open, and sends a low level to the second terminal of the second switching module 130 to control the first switching module 120 to close. The control unit 160 is also used, upon receiving a sleep deactivation command, to send a high level to the first coil pin Q1 of the first switching module 120 to control the first switching module 120 to close, and sends a high level to the second terminal of the second switching module 130 to control the second switching module 130 to open.

[0037] In one possible implementation, the detection module 140 is a high-side chip or a detection circuit. The high-side chip integrates current detection, protection, and control functions. The high-side chip measures the current flowing through the load through an internal current detection circuit, which typically includes a small resistor (called a sensing resistor or shunt resistor). When current flows through this resistor, a voltage drop proportional to the current is generated. An internal analog-to-digital converter within the high-side chip converts this voltage into a digital signal. Then, an internal comparator or microcontroller determines whether the current exceeds a current threshold. If the current exceeds the current threshold, the high-side chip generates an electrical signal (including high and low levels) and sends the signal to the control unit 160. The current threshold can be set according to different vehicle conditions; this application does not impose specific limitations.

[0038] One possible implementation is, such as Figure 7 As shown, Figure 7 The diagram shows a detection circuit according to an embodiment of this application. The detection circuit includes a detection resistor R0, an amplifier circuit, and a voltage comparator circuit. The amplifier circuit includes a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, and an operational amplifier. The voltage comparator circuit includes a voltage comparator, an eighth resistor R8, and a ninth resistor R9. One end of the fifth resistor R5 and the second switch module 130 are respectively connected to one end of the detection resistor R0. The system-on-a-chip 150 and one end of the seventh resistor R7 are respectively connected to the other end of the detection resistor R0. The other end of the fifth resistor R5 and one end of the fourth resistor R4 are respectively connected to the positive input terminal of the operational amplifier. The fourth resistor R4 is connected to ground at one end. The other end of the seventh resistor R7 and one end of the sixth resistor R6 are connected to the negative input terminal of the operational amplifier, respectively. The output terminal of the operational amplifier is connected to the positive input terminal of the voltage comparator. The other end of the sixth resistor R6 is connected between the output terminal of the operational amplifier and the positive input terminal of the voltage comparator. The negative input terminal of the voltage comparator is connected to one end of the eighth resistor R8. The other end of the eighth resistor R8 is connected to the reference voltage. One end of the ninth resistor R9 is connected between the negative input terminal of the voltage comparator and the eighth resistor R8. The other end of the ninth resistor R9 is grounded. The output terminal of the voltage comparator is connected to the control unit 160.

[0039] When the first switch module 120 is open and the second switch module 130 is closed, that is, when the vehicle cockpit system 100 enters STR mode, the detection resistor R0 detects the input current of the input system-on-a-chip 150 and converts the input current into an input voltage. After the input voltage is amplified by an amplifier, it is transmitted to a voltage comparator. The voltage comparator determines whether the amplified input voltage exceeds the voltage threshold. If the input voltage exceeds the voltage threshold, the voltage comparator outputs a high level to the control unit 160. The control unit 160 is awakened from deep sleep mode, disconnects the connection between the system power supply 110 and the system-on-a-chip 150, and then enters deep sleep mode again.

[0040] In one possible implementation, the control unit 160 is also used to control the second switch module 130 to disconnect upon receiving an electrical signal.

[0041] When the control unit 160 controls the disconnection between the system power supply 110 and the system-on-a-chip 150, the control unit 160 can control the second switch module 130 to disconnect. When the second switch module 130 is a switch circuit, the control unit 160 can send a low level to the second terminal of the second switch module 130 to control the second switch module 130 to disconnect. When the second switch module 130 is a relay, the control unit 160 can send a low level to the first coil pin Q1 of the second switch module 130 to control the second switch module 130 to disconnect.

[0042] In one possible implementation, the vehicle cockpit system further includes a power management module 180, with a first switch module 120 and a detection module 140 respectively connected to one end of the power management module 180, and the other end of the power management module 180 connected to a system-on-a-chip 150.

[0043] In one possible implementation, the power management module 180 includes a voltage converter and a third switch module. The first switch module 120 and the detection module 140 are respectively connected to one end of the voltage converter, and the other end of the voltage converter is connected to one end of the third switch module. The control unit 160 and the system-on-a-chip 150 are respectively connected to the other end of the third switch module. When one of the first switch module 120 and the second switch module 130 is closed, the third switch module is closed. The control unit 160 is also used to control the third switch module to open when an electrical signal is received.

[0044] refer to Figure 2The vehicle cockpit system provided in this application also includes a battery management module 180. The battery management module 180 includes a voltage converter (DC / DC converter) and a third switching module. The voltage converter can convert the large voltage input from the system power supply 110 into a small voltage suitable for the operation of the system-on-a-chip 160, ensuring that the provided voltage meets the usage requirements of the system-on-a-chip 160, enabling the system-on-a-chip 160 to operate stably and efficiently. The third switching module is... Figure 5 The switch circuit shown has its first terminal connected to the voltage converter, its second terminal connected to the control unit 160, and its third terminal connected to the system-on-a-chip 150. When either the first switch module 120 or the second switch module 130 is closed, the third switch module must be closed. When the control unit 160 receives an electrical signal and needs to disconnect the connection between the system power supply 110 and the system-on-a-chip 150, the control unit 160 can either control the third switch module to open only, or control both the second and third switch modules to open simultaneously, or control only the second switch module 130 to open.

[0045] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A vehicle cockpit system, characterized in that, The vehicle cockpit system includes: a system power supply, a first switch module, a second switch module, a detection module, a system-on-a-chip, a control unit, and vehicle load components; The first switch module and the second switch module are electrically connected to the system power supply, the first switch module is electrically connected to the system-on-a-chip, the second switch module is electrically connected to the detection module, the detection module is signal-connected to the control unit, the detection module is electrically connected to the system-on-a-chip, the system-on-a-chip is signal-connected to the vehicle load component, the control unit is communicatively connected to the system-on-a-chip, and the first switch module and the second switch module are signal-connected to the control unit. The control unit is used to control the second switch module to close and the first switch module to open when a sleep command is received; The detection module is used to detect the input current of the system-on-a-chip when the first switch module is open and the second switch module is closed, and to send an electrical signal to the control unit when the input current is greater than the current threshold. The control unit is used to disconnect the connection between the system power supply and the system-on-a-chip upon receiving the electrical signal; The control unit is also configured to control the first switch module to close and the second switch module to open upon receiving a sleep cancellation command; The system-on-a-chip is used to control the vehicle load components when the first switch module is closed and the second switch module is open.

2. The vehicle cockpit system according to claim 1, characterized in that, The first switch module is a relay or a switch circuit, and the second switch module is a relay or a switch circuit.

3. The vehicle cockpit system according to claim 2, characterized in that, The switching circuit includes: a MOSFET, a transistor, a resistor, a first capacitor, a second capacitor, a third capacitor, and a fourth capacitor; The resistive element includes a first resistor and a second resistor. The gate of the MOSFET is connected to the collector of the transistor through a third resistor. The emitter of the transistor is grounded. One end of the first resistor is connected between the collector of the transistor and the third resistor, and the other end of the first resistor is connected to the source of the MOSFET. One end of the second resistor is connected to the base of the transistor. One end of the first capacitor is connected to the source of the MOSFET, and the other end of the first capacitor is grounded. One end of the second capacitor is connected to the source of the MOSFET, and the other end of the second capacitor is connected between the gate of the MOSFET and the third resistor. One end of the third capacitor is connected to the drain of the MOSFET, and the other end of the third capacitor is grounded. One end of the fourth capacitor is connected between the base of the transistor and the second resistor, and the other end of the fourth capacitor is grounded. The source of the MOSFET is the first terminal of the switching circuit, the other end of the second resistor is the second terminal of the switching circuit, and the drain of the MOSFET is the third terminal of the switching circuit. When the first switching module is a switching circuit, the first terminal of the switching circuit is connected to the system power supply, the second terminal of the switching circuit is connected to the control unit, and the third terminal of the switching circuit is connected to the system-on-a-chip. When the second switching module is a switching circuit, the first terminal of the switching circuit is connected to the system power supply, the second terminal of the switching circuit is connected to the control unit, and the third terminal of the switching circuit is connected to the detection module. The control unit is used to send a low level to the second terminal of the second switch module to control the second switch module to close, and to send a high level to the second terminal of the first switch module to control the first switch module to open, upon receiving a sleep command. The control unit is further configured to, upon receiving a sleep deactivation command, send a low level to the second terminal of the first switch module to control the first switch module to close, and send a high level to the second terminal of the second switch module to control the first switch module to open.

4. The vehicle cockpit system according to claim 2, characterized in that, The relay includes a first coil pin, a second coil pin, a first contact pin, and a second contact pin; When the first switch module is a relay, the first coil pin of the first switch module is connected to the control unit, the second coil pin of the first switch module is grounded, the first contact pin of the first switch module is connected to the system-on-a-chip, and the second contact pin of the first switch module is connected to the system power supply. When the second switch module is a relay, the first coil pin of the second switch module is connected to the control unit, the second coil pin of the second switch module is grounded, the first contact pin of the second switch module is connected to the detection module, and the second contact pin of the second switch module is connected to the system power supply. The control unit is used to send a high level to the first coil pin of the second switch module to control the second switch module to close, and to send a low level to the first coil pin of the first switch module to control the first switch module to open, upon receiving a sleep command. The control unit is further configured to, upon receiving a sleep deactivation command, send a high level to the first coil pin of the first switch module to control the first switch module to close, and send a low level to the first coil pin of the second switch module to control the second switch module to open.

5. The vehicle cockpit system according to claim 2, characterized in that, The first switching module is a switching circuit, which includes: a MOSFET, a transistor, a resistor, a first capacitor, a second capacitor, a third capacitor, and a fourth capacitor; The resistive element includes a first resistor and a second resistor. The gate of the MOSFET is connected to the collector of the transistor through a third resistor. The emitter of the transistor is grounded. One end of the first resistor is connected between the collector of the transistor and the third resistor, and the other end of the first resistor is connected to the source of the MOSFET. One end of the second resistor is connected to the base of the transistor. One end of the first capacitor is connected to the source of the MOSFET, and the other end of the first capacitor is grounded. One end of the second capacitor is connected to the source of the MOSFET, and the other end of the second capacitor is connected between the gate of the MOSFET and the third resistor. One end of the third capacitor is connected to the drain of the MOSFET, and the other end of the third capacitor is grounded. One end of the fourth capacitor is connected between the base of the transistor and the second resistor, and the other end of the fourth capacitor is grounded. The source of the MOSFET is the first terminal of the switching circuit, the other end of the second resistor is the second terminal of the switching circuit, the drain of the MOSFET is the third terminal of the switching circuit, the first terminal of the switching circuit is connected to the system power supply, the second terminal of the switching circuit is connected to the control unit, and the third terminal of the switching circuit is connected to the system-on-a-chip. The second switch module is a relay, which includes a first coil pin, a second coil pin, a first contact pin, and a second contact pin. The first coil pin of the second switch module is connected to the control unit, the second coil pin of the second switch module is grounded, the first contact pin of the second switch module is connected to the detection module, and the second contact pin of the second switch module is connected to the system power supply. The control unit is used to send a high level to the first coil pin of the second switch module to control the second switch module to close, and to send a high level to the second terminal of the first switch module to control the first switch module to open, upon receiving a sleep command. The control unit is also configured to, upon receiving a sleep release command, send a low level to the second terminal of the first switch module to control the first switch module to close, and send a low level to the first coil pin of the second switch module to control the second switch module to open.

6. The vehicle cockpit system according to claim 1, characterized in that, The detection module is a high-side chip or a detection circuit.

7. The vehicle cockpit system according to claim 6, characterized in that, The detection circuit includes a detection resistor, an amplifier circuit, and a voltage comparison circuit; The amplifier circuit includes: a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, and an operational amplifier; The voltage comparison circuit includes: a voltage comparator, an eighth resistor, and a ninth resistor; One end of the fifth resistor and the second switch module are respectively connected to one end of the detection resistor. One end of the system-on-a-chip and the seventh resistor are respectively connected to the other end of the detection resistor. The other end of the fifth resistor and one end of the fourth resistor are respectively connected to the positive input terminal of the operational amplifier. The other end of the fourth resistor is grounded. The other end of the seventh resistor and one end of the sixth resistor are respectively connected to the negative input terminal of the operational amplifier. The output terminal of the operational amplifier is connected to the positive input terminal of the voltage comparator. The other end of the sixth resistor is connected between the output terminal of the operational amplifier and the positive input terminal of the voltage comparator. The negative input terminal of the voltage comparator is connected to one end of the eighth resistor. The other end of the eighth resistor is connected to a reference voltage. One end of the ninth resistor is connected between the negative input terminal of the voltage comparator and the eighth resistor. The other end of the ninth resistor is grounded. The output terminal of the voltage comparator is connected to the control unit.

8. The vehicle cockpit system according to claim 1, characterized in that, The control unit is also configured to control the second switch module to disconnect upon receiving the electrical signal.

9. The vehicle cockpit system according to claim 1, characterized in that, The vehicle cockpit system further includes a power management module, wherein the first switch module and the detection module are respectively connected to one end of the power management module, and the other end of the power management module is connected to the system-on-a-chip.

10. The vehicle cockpit system according to claim 9, characterized in that, The power management module includes a voltage converter and a third switch module. The first switch module and the detection module are respectively connected to one end of the voltage converter, and the other end of the voltage converter is connected to one end of the third switch module. The control unit and the system-on-a-chip are respectively connected to the other end of the third switch module. When either the first switch module or the second switch module is closed, the third switch module is closed. The control unit is also configured to control the third switch module to disconnect upon receiving the electrical signal.

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