Power management method for vehicle-mounted entertainment system

Abstract

The invention provides a power management method for a vehicle-mounted entertainment system, and belongs to the technical field of power management. A control module monitors the voltage of a storage battery, the ACC gear state and a vehicle door opening and closing signal in real time; the control module constructs a state machine model based on Autosar network architecture, and dynamically switches a power supply mode; and when the control module detects that the key is in an OFF gear and the left front door is not opened, the 10-minute mode of time-limited power supply is activated. The power supply mode comprises a power-down mode, a sleep mode, a working mode and a 10-minute mode. And when the in-vehicle infotainment device is in the sleep mode and detects that the user approaches to start and does not lighten the screen, the user gets on the vehicle and lightens the screen when the gear position is at the ACC ON gear. According to the invention, the feed condition of the small storage battery caused by the use of the vehicle-mounted entertainment system after power-off is prevented, and meanwhile, the starting time is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of power management, and more specifically, the present invention relates to a power management method for an in-vehicle entertainment system. Background Art

[0002] Generally speaking, the in-vehicle entertainment system of a pure electric vehicle is a big power consumer of the small battery. However, there are some scenarios where users use the in-vehicle entertainment system after parking. At this time, the in-vehicle entertainment system is powered by the small battery, which is very likely to cause the small battery to run out of power. After the small battery runs out of power, the user cannot shift into the ACC ON gear again.

[0003] Chinese Patent No. 116176462A discloses a method and device for controlling a square control screen, a vehicle, and a storage medium, belonging to the technical field of vehicles. It includes: when the target vehicle is in a powered-off state, determining the vehicle mode of the target vehicle; when the vehicle mode is a display vehicle mode or an entertainment mode, obtaining the screen state of the multimedia center control screen of the target vehicle, where the display vehicle mode indicates that the target vehicle is currently in a scenario where the driving function is blocked, and the entertainment mode indicates that the target vehicle is currently in a scenario where the multimedia playback function is turned on; based on the screen state of the multimedia center control screen, controlling the square control screen to be turned on or off, and the square control screen is located on the steering wheel of the target vehicle.

[0004] The prior art does not consider that continued use of the in-vehicle entertainment after power-off may cause the small battery to run out of power, which may affect the starting of the vehicle. Summary of the Invention

[0005] The present invention aims to provide a power management method for an in-vehicle entertainment system to achieve the technical purpose of preventing the small battery from running out of power.

[0006] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0007] The present invention provides a power management method for an in-vehicle entertainment system:

[0008] The control module continuously monitors the battery voltage, the ACC gear state, and the door switch signal; the control module constructs a state machine model based on the Autosar network architecture and dynamically switches the power mode; when the control module detects that the key is in the OFF position and the left front door is not opened, the 10-minute mode with limited power supply is activated.

[0009] The power modes include a power-off mode, a sleep mode, a working mode, and a 10-minute mode.

[0010] When the battery voltage is lower than the power-off voltage, the system enters the power-off mode; when the key is in the OFF position and the left front door is opened, the system enters the sleep state; when the key is in the ACC ON position, the system enters the working mode; when the key is in the OFF position and the left front door is closed, the system enters the 10-minute mode with limited power supply, and enters the sleep mode after the countdown ends.

[0011] The working modes include the full - function mode, the screen - off mode, and the screensaver mode.

[0012] In the working modes, the full - function mode migrates with the screen - off mode, and the full - function mode migrates with the screensaver mode.

[0013] The 10 - minute mode includes the full - function mode, the screen - off mode, and the screensaver mode.

[0014] In the 10 - minute mode, the full - function mode migrates with the screen - off mode, and the full - function mode migrates with the screensaver mode.

[0015] When the vehicle head unit is in the sleep mode and detects that the user approaches and starts up without lighting up the screen, the screen lights up when the user gets in the car and places the gear in the ACC ON position.

[0016] After the vehicle senses the arrival of the user, it wakes up the vehicle network message and triggers polling. The vehicle network enters the frame - repetition state of the autosar network management. The control module starts the vehicle head unit without lighting up the screen. After the user gets in the car and closes the door, the control module lights up the screen when it detects that the gear is in the ACC ON position.

[0017] The technical effects of the present invention are as follows:

[0018] (1) The present invention accurately manages the power supply, prevents the small battery from discharging, and avoids the failure that the car cannot start due to the discharge of the small battery.

[0019] (2) The present invention enhances the user experience and interaction flexibility, protects the driving safety of the driver, supports the screen - off mode and the screensaver mode, and reduces driver distraction. The ten - minute mode allows lightweight use of entertainment functions to meet user needs.

[0020] (3) The screen - off mode of the present invention supports multiple wake - up methods, and the screensaver mode can be quickly unlocked through physical keys, improving the operation efficiency.

[0021] (4) The present invention is modularly developed based on the Autosar architecture, with high development efficiency and reduced development difficulty.

[0022] (5) The present invention significantly shortens the startup time. The vehicle head unit completes the initialization of the core process in advance in the sleep mode, and only needs to light up the screen when the user turns the key to ACC ON. Brief Description of the Drawings

[0023] This specification includes the following drawings, and the shown contents are respectively:

[0024] Figure 1 It is a schematic diagram of mode conversion of a power management method for an in - vehicle entertainment system according to the present invention. Detailed Embodiments

[0025] The following will, with reference to the accompanying drawings, further elaborate on the specific implementation of the present invention through the description of embodiments, aiming to help those skilled in the art have a more complete, accurate, and in-depth understanding of the inventive concept and technical solution of the present invention and facilitate its implementation.

[0026] The present invention provides a power management method for an in-vehicle entertainment system:

[0027] The control module monitors the battery voltage, ACC gear position status, and door switch signal in real time; the control module constructs a state machine model based on the Autosar network architecture to dynamically switch the power mode; when the control module detects that the key is in the OFF gear and the left front door is not opened, it activates the 10-minute mode with limited power supply.

[0028] The power modes include a power-off mode, a sleep mode, a working mode, and a 10-minute mode.

[0029] When the battery voltage is lower than the power-feed voltage, the system enters the power-off mode; when the key is in the OFF gear and the left front door is opened, the system enters the sleep state; when the key is in the ACC ON gear, it enters the working mode; when the key is in the OFF gear and the left front door is closed, the system enters the 10-minute mode with limited power supply, and enters the sleep mode after the countdown ends.

[0030] The working mode includes a full-function mode, a screen-off mode, and a screensaver mode.

[0031] In the working mode, the full-function mode migrates with the screen-off mode and the full-function mode migrates with the screensaver mode.

[0032] The 10-minute mode includes a full-function mode, a screen-off mode, and a screensaver mode.

[0033] In the 10-minute mode, the full-function mode migrates with the screen-off mode and the full-function mode migrates with the screensaver mode.

[0034] When the vehicle machine detects that the user approaches and starts up without lighting up the screen in the sleep mode, the screen lights up when the user gets in the car and places the gear in the ACC ON position.

[0035] After the vehicle senses the arrival of the user, it wakes up the vehicle network message and triggers polling. The vehicle network enters the frame repetition state of autosar network management. The control module starts the vehicle machine without lighting up the screen. After the user gets in the car and closes the door, the control module lights up the screen when it detects that the gear is in the ACC ON position.

[0036] The following will detail a power management method for an in-vehicle entertainment system according to the present invention.

[0037] The control module monitors the battery voltage, ACC gear position status, and door switch signal in real time through the bus. In the embodiment of the present invention, the control module uses NXP i.MX 8M Plus.

[0038] The control module constructs a state machine model based on the Autosar network architecture and dynamically switches the power mode. Specifically, the control module first defines the states. The top-level states are defined as the power-off mode, sleep mode, working mode, and ten-minute mode, and the sub-states are defined as the full-function mode, screen-off mode, and screensaver mode. After determining the input and output events, it selects the Autosar module to perform state machine modeling, and finally realizes the function through software.

[0039] When the control module detects that the key is in the OFF position and the left front door is not opened, it activates the 10-minute mode with limited power supply.

[0040] The power modes include the power-off mode, sleep mode, working mode, and ten-minute mode. In the power-off mode, the battery loses power, that is, the small battery Bat+ loses power. In the sleep mode, when the key is turned to the OFF position, the processor of the host is in the sleep state. The typical scenario of this mode generally occurs when the driver or passenger presses the car key to open the door but does not insert the key or pulls out the key and gets out of the car through the left front door. In the working mode, when the key is in the ACC ON position, the host enters the working mode. There are three sub-modes inside the working mode, and the sub-modes can migrate directly to each other.

[0041] The three sub-modes of the working mode are the full-function mode, screen-off mode, and screensaver mode respectively. Among them, the full-function mode means that the host runs with all functions. The screen-off mode means that in the full-function mode, when the user clicks the screen-off soft button in the car machine notification drop-down bar, it enters the screen-off mode. In the screen-off mode, the host runs with all functions, only the screen is turned off. This mode is mainly used for driving safety, and the fact that the screen is not lit can save battery power to a certain extent. The screensaver mode means that the user presses the Power physical hard button on the vehicle instrument panel to enter the lock screen mode. This mode is mainly used for driving safety.

[0042] In the ten-minute mode, the user parks the car but does not get out and still has the entertainment needs of the car machine in the car. The ten-minute mode also includes the full-function mode, screen-off mode, and screensaver mode. Among them, in the full-function mode, the host runs with all functions. The screen-off mode means that in the full-function mode, when the user clicks the "screen-off" soft button on the car machine, it enters the screen-off mode. In the screen-off mode, the host runs with all functions, only the screen is turned off. The screensaver mode means that the user presses the Power physical button to enter the lock screen mode. The ten-minute mode of the present invention prevents the small battery from discharging by setting a countdown while meeting the lightweight entertainment needs of the user.

[0043] The mutual conversion of the power-off mode, sleep mode, working mode, and ten-minute mode is described below. After power-on, the power-off mode will enter the sleep mode. In the sleep mode, when the gear of the vehicle reaches ACC ON, the system will enter the working module from the sleep mode. If, in the working mode, the user opens the left front door of the vehicle and shifts to the OFF gear, the system will return from the working mode to the sleep mode. When the system is in the working mode, if the user turns the key to the OFF gear and the left front door is not opened, the system will enter the ten-minute mode from the working mode. If the user turns the key to the ACC ON gear in the ten-minute mode, it will return from the ten-minute mode to the working mode. In the ten-minute mode, the system can enter the sleep mode in three ways, namely: when the ten-minute countdown expires; the key is turned to OFF and the left front door is opened; the system receives the CAN signal of the vehicle's successful arming.

[0044] The three sub-modes of the full-function mode, screen-off mode, and screensaver mode in the working mode can migrate to each other. The full-function mode enters the screen-off mode after the user presses the screen-off soft button on the negative first screen of the central control. The screen-off mode can enter the full-function mode in five ways, namely: pressing the central control MODE key, pressing the physical air-conditioning button, a Bluetooth call or disconnection, reversing, clicking on any area of the screen, and waking up with Baidu Carlife voice. The full-function mode can enter the screensaver mode by pressing the physical hard button Power on the dashboard briefly, and pressing it again can return to the full-function mode.

[0045] The three sub-modes of the full-function mode, screen-off mode, and screensaver mode in the ten-minute mode can also migrate to each other. The full-function mode can enter the screensaver mode by pressing the physical hard button Power on the dashboard, and pressing the physical hard button Power on the dashboard again can return to the full-function mode. The full-function mode can enter the screen-off mode by pressing the screen-off soft button on the negative first screen of the central control. The screen-off mode can enter the full-function module in five ways, including: pressing the central control MODE key, pressing the physical air-conditioning button, a Bluetooth call or disconnection, reversing, clicking on any area of the screen, and waking up with Baidu Carlife voice.

[0046] The in-vehicle system in the embodiment of the present invention uses the Android 4.4 version, and the average power-on time is about 22 seconds. The time taken for power-on is mainly concentrated on the initialization of core processes and the loading of system resources, and there is little room for optimization. The in-vehicle system can start in the aforementioned sleep mode without lighting up the screen, and when the user gets in the car and places the gear in the ACC ON position, the screen lights up, thereby indirectly achieving the purpose of shortening the power-on time. The specific process is as follows: when the user approaches the vehicle, the vehicle senses the user's arrival through the wireless signal of the key, the body controller wakes up the vehicle network message, and triggers polling. The vehicle network enters the frame repetition state of the autosar network management (which is the sleep mode defined above), and the microcontroller starts the in-vehicle system without lighting up the screen. When the user gets in the car and places the gear in the ACC ON position, the screen lights up.

[0047] The present invention precisely manages the power supply, prevents the small battery from discharging, and avoids the failure that the vehicle cannot start due to the discharge of the small battery.

[0048] The present invention enhances the user experience and interaction flexibility, protects the driving safety of the driver, supports the screen-off mode and the screensaver mode, and reduces driver distraction. The ten-minute mode allows lightweight use of entertainment functions to meet user needs.

[0049] The screen-off mode of the present invention supports multiple wake-up methods, and the screensaver mode can be quickly unlocked through the physical keys, improving the operation efficiency.

[0050] The present invention is modularly developed based on the Autosar architecture, with high development efficiency and reduced development difficulty.

[0051] The present invention significantly shortens the startup time. The in-vehicle computer completes the initialization of the core process in advance in the sleep mode, and the user only needs to light up the screen when turning the key to ACC ON.

[0052] The present invention has been described exemplarily in combination with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited by the above methods. As long as various non-substantive improvements are made by adopting the method concept and technical solution of the present invention; or without improvement, the above concept and technical solution of the present invention are directly applied to other occasions, all are within the protection scope of the present invention.

Claims

1. A power management method for an in-vehicle entertainment system, characterized in that, It includes: The control module monitors the battery voltage, ACC gear position status, and door switch signal in real time; The control module constructs a state machine model based on the Autosar network architecture and dynamically switches the power mode; When the control module detects that the key is in the OFF gear and the left front door is not opened, it activates the 10-minute mode with limited power supply.

2. The power management method of an in-vehicle entertainment system according to claim 1, wherein: The power modes include power-off mode, sleep mode, working mode, and 10-minute mode.

3. The power management method of an in-vehicle entertainment system according to claim 2, characterized in that: When the battery voltage is lower than the power-failure voltage, the system enters the power-off mode; when the key is in the OFF gear and the left front door is opened, the system enters the sleep state; when the key is in the ACC ON gear, it enters the working mode; when the key is in the OFF gear and the left front door is closed, the system enters the 10-minute mode with limited power supply and enters the sleep mode after the countdown ends.

4. The power management method of an in-vehicle entertainment system according to claim 2, characterized in that: The working mode includes full-function mode, screen-off mode, and screensaver mode.

5. The power management method of an in-vehicle entertainment system according to claim 4, characterized in that: In the working mode, the full-function mode migrates with the screen-off mode, and the full-function mode migrates with the screensaver mode.

6. The power management method of an in-vehicle entertainment system according to claim 2, characterized in that: The 10-minute mode includes full-function mode, screen-off mode, and screensaver mode.

7. The power management method of an in-vehicle entertainment system according to claim 6, characterized in that: In the 10-minute mode, the full-function mode migrates with the screen-off mode, and the full-function mode migrates with the screensaver mode.

8. The power management method of an in-vehicle entertainment system according to claim 1, wherein: When the vehicle head unit detects that the user approaches and starts up without lighting up the screen in the sleep mode, the screen lights up when the user gets in the car and places the gear in the ACC ON position.

9. The power management method of an in-vehicle entertainment system according to claim 1, wherein: After the vehicle senses the arrival of the user, it wakes up the vehicle network message and triggers polling. The vehicle network enters the frame repetition state of autosar network management. The control module starts the vehicle head unit without lighting up the screen. After the user gets in the car and closes the door, the control module lights up the screen when it detects that the gear is in the ACC ON position.

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