Awakening system of automobile data recorder and system control method

Abstract

The invention provides a wake-up system of an automobile data recorder and a system control method, and relates to the technical field of vehicle control, the system comprises a wake-up circuit, a system chip and a power supply chip, the power supply chip is respectively connected with the wake-up circuit and the system chip; wherein the wake-up circuit is used for receiving a trigger signal sent by the signal interface and sending a pulse signal to the power supply chip when the trigger signal is received, so that the mainboard power supply enters a wake-up state; the system chip is used for detecting the type of a trigger signal when the mainboard power supply is in a wake-up state, and sending a system holding signal to the wake-up circuit to keep the system in a start-up state when the detection result is a constant electric trigger signal; and the power supply chip is used for performing power supply management on the working state of the mainboard power supply. According to the invention, the on-off control cost of the automobile data recorder can be obviously reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle control, and in particular to a wake-up system of a driving recorder and a system control method. Background Art

[0002] In the current wake-up system of the existing driving recorder, when waking up the circuit, the MCU is needed to control the power-on of the CPU. The relevant technology proposes that all trigger signals can be transmitted to the MCU first, and then the internal program of the MCU is used to perform logical judgment to determine whether to power on the CPU. After confirming that the CPU is powered on, the type of trigger signal to trigger the power-on is notified to the CPU through UART communication.

[0003] However, when using the MCU, this solution requires the MCU to be powered on all the time so that it can detect the trigger signal all the time. This places high demands on the stability of the MCU, and requires adding a mechanism inside or outside the MCU to prevent the MCU from crashing. Moreover, since the MCU is always powered on, the static power consumption of the machine will also be affected by the MCU. In addition, the use of the MCU will increase costs, such as hardware production costs, MCU software program development costs, and the manpower and material costs required for MCU program stability testing. Summary of the invention

[0004] In view of this, an object of the present invention is to provide a wake-up system and a system control method for a driving recorder, which can significantly reduce the power on and off control cost of the driving recorder.

[0005] In a first aspect, an embodiment of the present invention provides a wake-up system for a driving recorder, the system comprising: a wake-up circuit, a system chip and a power chip, the power chip being connected to the wake-up circuit and the system chip respectively; wherein the wake-up circuit is used to receive a trigger signal sent by a signal interface, and upon receiving the trigger signal, sends a pulse signal to the power chip to enable the mainboard power supply to enter a wake-up state, wherein when the mainboard power supply enters the wake-up state, it is briefly started within a preset time interval; the system chip is used to detect the type of trigger signal when the mainboard power supply is in the wake-up state, and when the detection result is a normal power trigger signal, sends a system hold signal to the wake-up circuit to keep the system in a started state; the power chip is used to perform power supply management on the working state of the mainboard power supply.

[0006] In one embodiment, the wake-up circuit includes: a signal interface set, the signal interface set includes: a first signal interface, a second signal interface and a third signal interface set; wherein the first signal interface is used to receive a key control signal sent by a keyboard; the second signal interface is used to receive a system hold signal sent by a system chip; the third signal interface set includes: a preset number of third signal interfaces, and the third signal interface is used to receive a constant power trigger signal sent by a power button.

[0007] In one embodiment, the wake-up circuit includes: a fast discharge circuit, and each third signal interface is respectively connected to a corresponding fast discharge circuit; wherein the fast discharge circuit is used to reduce the time interval between two adjacent circuit wake-ups of the wake-up system of the driving recorder.

[0008] In one embodiment, the fast discharge circuit includes: a capacitor, a first resistor and a second resistor, the capacitor is connected to a third signal interface, and the first resistor and the second resistor are connected in parallel at both ends of the capacitor; wherein the capacitor is used to send a pulse signal to the power chip when receiving a trigger signal whose high level duration reaches a preset time threshold; the first resistor and the second resistor are used to make the capacitor discharge quickly to shorten the preparation time for the next circuit wake-up.

[0009] In one embodiment, the fast discharge circuit includes: a protection diode, a first isolation diode and a second isolation diode, the protection diode is connected to the second resistor, the first isolation diode is respectively connected to the third signal interface and the capacitor, and the second isolation diode is respectively connected to the capacitor and the power chip; wherein the protection diode is used to suppress the reverse current generated by the capacitor during the discharge process, and after the capacitor is discharged and the signal of the third signal interface disappears, suppress the negative voltage caused by the sudden voltage drop across the capacitor to protect the fast discharge circuit; the first isolation diode and the second isolation diode are used to prevent the superposition of multiple signals and interfere with the normal power trigger signal of the third signal interface.

[0010] In the second aspect, an embodiment of the present invention also provides a system control method, which is applied to the wake-up system of a driving recorder, and the method includes: when a trigger signal sent by a third signal interface is received, charging the capacitor in the fast discharge circuit to increase the voltage across the capacitor; when the voltage across the capacitor is increased to the same level as the trigger signal, generating a pulse signal; using the pulse signal to make the mainboard power supply enter the wake-up state, and when the mainboard power supply is in the wake-up state, detecting the type of the trigger signal, so that when the detection result is a normal power trigger signal, raising the level of the system hold signal, so that the system remains in the startup state.

[0011] In one embodiment, before the step of receiving the trigger signal sent by the third signal interface, it includes: obtaining preset parameter configuration information, wherein the preset parameter configuration information includes a target high-level wake-up duration and a target trigger interval for the second wake-up; using the parameter configuration information, adjusting the capacitance of the capacitor in the fast discharge circuit, and the resistance of the first resistor and the second resistor to determine the target capacitance of the capacitor, and the target resistance of the first resistor and the second resistor.

[0012] In one embodiment, parameter configuration information is used to adjust the capacitance of a capacitor in a fast discharge circuit and the resistance of a first resistor and a second resistor to determine a target capacitance of the capacitor and a target resistance of the first resistor and the second resistor, including: increasing the capacitance of the capacitor to increase the high-level wake-up duration of the fast discharge circuit, and reducing the resistance of the first resistor and the second resistor to reduce the trigger interval of the secondary wake-up; when the high-level wake-up duration reaches the target high-level wake-up duration, the capacitance is determined as the target capacitance; when the trigger interval of the secondary wake-up reaches the target trigger interval, the resistance is determined as the target resistance.

[0013] In a third aspect, an embodiment of the present invention further provides an electronic device, comprising a processor and a memory, wherein the memory stores computer executable instructions that can be executed by the processor, and the processor executes the computer executable instructions to implement any one of the methods provided in the second aspect.

[0014] In a fourth aspect, an embodiment of the present invention further provides a computer-readable storage medium, which stores computer-executable instructions. When the computer-executable instructions are called and executed by a processor, the computer-executable instructions prompt the processor to implement any one of the methods provided in the second aspect.

[0015] The embodiments of the present invention bring the following beneficial effects:

[0016] An embodiment of the present invention provides a wake-up system and system control method for a driving recorder. The system includes: a wake-up circuit, a system chip and a power chip, and the power chip is connected to the wake-up circuit and the system chip respectively; wherein the wake-up circuit is used to receive a trigger signal sent by a signal interface, and when receiving the trigger signal, sends a pulse signal to the power chip to put the mainboard power supply into a wake-up state; the system chip is used to detect the type of the trigger signal when the mainboard power supply is in the wake-up state, and when the detection result is a normal power trigger signal, sends a system hold signal to the wake-up circuit to keep the system in a startup state; the power chip is used to manage the power supply of the working state of the mainboard power supply. The embodiment of the present invention can significantly reduce the power on and off control cost of the driving recorder, and improve the wake-up success rate by reducing the preparation time for the second wake-up.

[0017] Other features and advantages of the present invention will be described in the following description, and some of the contents will become apparent in the description, or can be learned by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description, claims and drawings.

[0018] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A schematic diagram of the structure of an existing wake-up system provided by an embodiment of the present invention;

[0021] Figure 2 A schematic diagram of the structure of a wake-up system for a driving recorder provided in an embodiment of the present invention;

[0022] Figure 3 A schematic diagram of the specific structure of a wake-up system for a driving recorder provided in an embodiment of the present invention;

[0023] Figure 4 A schematic flow chart of a system control method provided by an embodiment of the present invention;

[0024] Figure 5 A schematic diagram of the structure of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described in combination with the embodiments below. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] Currently, see Figure 1A structural schematic diagram of an existing wake-up system is shown. In the existing wake-up system of a driving recorder, an MCU is required to control the power-on of the CPU when the circuit is awakened. The relevant technology proposes that all trigger signals can be preferentially transmitted to the MCU, and then the internal program of the MCU is used to perform logical judgment to determine whether to power on the CPU, and after determining to power on, the CPU is notified of the type of trigger signal to trigger the startup through UART communication. However, when using the MCU, the MCU needs to be in a powered-on state all the time so as to detect the trigger signal all the time. This has high requirements on the stability of the MCU, and a mechanism needs to be added inside or outside the MCU to prevent the MCU from crashing. Moreover, since the MCU is always in a powered-on state, the static power consumption of the machine will also be affected by the MCU. In addition, the use of the MCU will increase costs, such as hardware production costs, MCU software program development costs, and manpower and material costs required for MCU program stability testing.

[0027] Based on this, the wake-up system and system control method of the driving recorder provided by the implementation of the present invention can solve the high cost brought by the existing solution of using MCU for power on and off control, and use cheap electronic components such as resistors and capacitors to build the wake-up circuit to reduce costs, and use the unidirectional conductivity of diodes to separate the capacitors, thereby separately forming an inner circulation capacitor discharge loop (i.e., wake-up circuit). After the trigger signal level stabilizes, the charging voltage of the capacitor reaches the maximum value and will no longer be charged. At this time, the capacitor enters the inner circulation fast discharge circuit, thereby significantly reducing the power on and off control cost of the driving recorder, and improving the wake-up success rate by reducing the preparation time for the second wake-up.

[0028] To facilitate understanding of this embodiment, a system control method disclosed in an embodiment of the present invention is first described in detail. The method is applied to a wake-up system of a driving recorder. The system includes: a wake-up circuit, a system chip, and a power chip. The power chip is connected to the wake-up circuit and the system chip, respectively. To facilitate understanding of the wake-up system of a driving recorder, an embodiment of the present invention provides a structural schematic diagram of a wake-up system of a driving recorder, such as Figure 2 As shown, the wake-up circuit is used to receive the trigger signal sent by the signal interface, and when receiving the trigger signal, sends a pulse signal to the power chip to make the mainboard power enter the wake-up state, wherein, when the mainboard power enters the wake-up state, it is briefly started within a preset time interval; the system chip is used to detect the type of trigger signal when the mainboard power is in the wake-up state, and when the detection result is a normal power trigger signal, sends a system hold signal to the wake-up circuit to keep the system in the startup state; the power chip is used to manage the power supply of the working state of the mainboard power.

[0029] In one embodiment, see Figure 3A specific structural schematic diagram of a wake-up system of a driving recorder is shown, the wake-up circuit includes: a signal interface set and a fast discharge circuit, the signal interface set includes: a first signal interface (i.e., Keying signal, keying signal interface), a second signal interface (i.e., System keep signal, system keep signal) and a third signal interface set (i.e., TRIGGER_SIGNAL, trigger signal); wherein the first signal interface is used to receive the keying signal sent by the keyboard; the second signal interface is used to receive the system keep signal sent by the system chip; the third signal interface set includes: a preset number of third signal interfaces, the third signal interface is used to receive the constant power trigger signal sent by the power button, each third signal interface is respectively connected to the corresponding fast discharge circuit, the fast discharge circuit is used to reduce the time interval between two adjacent circuit wake-ups of the wake-up system of the driving recorder, wherein the number of third interfaces is determined by the number of trigger signals that meet the system startup conditions.

[0030] In one embodiment, a fast discharge circuit includes: a capacitor (C1, C2), a first resistor (R1, R3), a second resistor (R2, R4), a protection diode (D1, D4), a first isolation diode (D2, D5) and a second isolation diode (D3, D6), the capacitor is connected to a third signal interface, the first resistor and the second resistor are connected in parallel to both ends of the capacitor, the protection diode is connected to the second resistor, the first isolation diode is connected to the third signal interface and the capacitor respectively, and the second isolation diode is connected to the capacitor and the power chip respectively. Specifically, the capacitor is used to send a pulse signal to the power chip when receiving a trigger signal whose high level duration reaches a preset time threshold; the first resistor and the second resistor are used to make the capacitor discharge quickly to shorten the preparation time for the next circuit wake-up; the protection diode is used to suppress the reverse current generated by the capacitor during the discharge process, and after the capacitor is discharged and the signal of the third signal interface disappears, suppress the negative voltage caused by the sudden drop in voltage across the capacitor to protect the fast discharge circuit; the first isolation diode and the second isolation diode are used to prevent the superposition of multiple signals and interfere with the normal power trigger signal of the third signal interface.

[0031] based on Figure 2 A structural diagram of a wake-up system for a driving recorder is shown and Figure 3 The specific structural diagram of the wake-up system of a driving recorder is shown in FIG. 1 , and the system control method is described in detail in the embodiment of the present invention. Figure 4 The flowchart of a system control method shown in FIG. 4 mainly includes the following steps S402 to S406:

[0032] Step S402, when a trigger signal sent by the third signal interface is received, the capacitor in the fast discharge circuit is charged to increase the voltage across the capacitor. In one embodiment, before receiving the signal, the fast discharge circuit needs to be configured and analyzed according to preset parameter configuration information so that the fast discharge circuit reaches the optimal high-level wake-up duration and the trigger interval for the second wake-up.

[0033] Step S404, when the voltage across the capacitor rises to the same level as the trigger signal, a pulse signal is generated. In one embodiment, after receiving a high-level trigger signal (i.e., a normal power trigger signal), the capacitor C1 will be charged after passing through the isolation diode D2. Since the voltage across the capacitor will not suddenly change, the voltage across the capacitor will continue to rise after the normal power trigger signal is triggered until it reaches the same level as the trigger signal, forming an "open circuit" state. A pulse signal is generated, and the pulse signal can briefly start the power supply of the circuit mainboard. The CPU determines whether to start the system during this short startup time. If the system needs to be started, the SYSTEM_EEP_SIGNAL signal (i.e., the system hold signal) is pulled high to maintain system startup.

[0034] Step S406, using a pulse signal to make the mainboard power supply enter the awake state, and when the mainboard power supply is in the awake state, the trigger signal type is detected, so that when the detection result is a normal power trigger signal, the level of the system holding signal is pulled up to keep the system in the startup state. In one embodiment, in order for the capacitor C1 to be able to normally output a pulse signal for multiple fast high-level trigger signals that reach a preset time threshold, it is also necessary to build a discharge circuit for the capacitor C1, and connect resistors R1 and R2 in parallel on both sides of the capacitor C1 so that the capacitor C1 can be quickly discharged. Since the voltage across the capacitor will not suddenly change, when the trigger signal disappears, the voltage of the capacitor near R2 will have a reverse voltage. In order to prevent the reverse voltage from causing damage to the circuit, a protective diode D1 needs to be connected in parallel, and the reverse current is suppressed by using the principle that the reverse bias of the diode is non-conductive, so that the reverse voltage generated by the capacitor will not damage other circuits. The last isolation diodes D2 and D3 are to prevent other trigger signals from affecting the trigger signal of this path, and the situation of starting without a trigger signal caused by the superposition of multiple signals.

[0035] The system control method provided by the embodiment of the present invention can significantly reduce the power on / off control cost of the driving recorder, and improve the wake-up success rate by reducing the preparation time for the second wake-up.

[0036] The embodiment of the present invention further provides an implementation method for performing configuration analysis on a fast discharge circuit before receiving a signal, for details, see (1) to (2) below:

[0037] (1) Obtaining preset parameter configuration information, wherein the preset parameter configuration information includes a target high-level wake-up duration and a target trigger interval for a second wake-up. In one embodiment, the target trigger interval is determined by analyzing the model of the driving recorder and the historical wake-up data of the driving recorder.

[0038] (2) Using the parameter configuration information, the capacitance of the capacitor in the fast discharge circuit and the resistance of the first resistor and the second resistor are adjusted to determine the target capacitance of the capacitor and the target resistance of the first resistor and the second resistor. In one embodiment, the high level wake-up time of the fast discharge circuit can be increased by increasing the capacitance of the capacitor, and the trigger interval of the secondary wake-up can be reduced by reducing the resistance of the first resistor and the second resistor: when the high level wake-up time reaches the target high level wake-up time, the capacitance is determined as the target capacitance; when the trigger interval of the secondary wake-up reaches the target trigger interval, the resistance is determined as the target resistance, that is, when the C1 fast discharge circuit discharges in the order of D1, R2, C1, D1, and the earth, the positive and negative charges of C1 are completely discharged, and the next trigger signal is ready (secondary wake-up). By changing the capacitance of C3, the length of the high level wake-up time can be adjusted. The larger the capacitance, the longer the high level time; by changing the resistance of R6 and R7, the secondary trigger interval can be adjusted. The smaller the resistance, the smaller the interval time of the secondary wake-up CPU.

[0039] In one embodiment, when C1 is charged, since the charging speed of the capacitor is closely related to the time constant τ, the charging process is usually nearly completed within several time constants. The time for the capacitor to charge to 63.2% (i.e., 1-1 / e) of the maximum voltage is τ, and the time required for the capacitor to charge to the maximum voltage is approximately 5τ.

[0040] In another embodiment, when C1 is discharged, the rapid discharge time formula is expressed as:

[0041] τ=R*C

[0042] t=-τ*ln(Vt / Vo)

[0043] Where t represents the time required for the voltage to decay to the target voltage, τ represents the time constant, which is defined as the product of the resistance R and the capacitance C in the circuit, Vt represents the voltage across the capacitor at time t, and Vo represents the initial voltage of the capacitor (i.e., the voltage at the beginning of discharge).

[0044] In addition, if there are multiple third signal interfaces and their corresponding fast discharge circuits, the connection and control scheme of the fast discharge circuits are the same as above.

[0045] In summary, the present invention realizes the wake-up function of the CPU through a circuit of resistors, capacitors and diodes. Compared with the existing MCU chip wake-up solution, the wake-up circuit has a simple structure, fewer devices and low cost. In addition, the charging and discharging time of the capacitor is adjusted by changing the values ​​of the capacitor and the resistor, thereby changing the duration of the wake-up high-level pulse, and a fast discharge circuit constructed by diodes, resistors and capacitors allows the wake-up circuit to prepare for the next circuit wake-up in a short time, which can effectively solve the problem of secondary or multiple triggering of CPU startup failure.

[0046] The device provided in the embodiment of the present invention has the same implementation principle and technical effects as those of the aforementioned method embodiment. For the sake of brief description, for matters not mentioned in the device embodiment, reference may be made to the corresponding contents in the aforementioned method embodiment.

[0047] An embodiment of the present invention provides an electronic device. Specifically, the electronic device includes a processor and a storage device. The storage device stores a computer program, and when the computer program is executed by the processor, it executes the method described in any one of the above-mentioned implementation methods.

[0048] Figure 5 A structural diagram of an electronic device provided in an embodiment of the present invention, the electronic device 100 includes: a processor 50, a memory 51, a bus 52 and a communication interface 53, wherein the processor 50, the communication interface 53 and the memory 51 are connected via the bus 52; the processor 50 is used to execute an executable module stored in the memory 51, such as a computer program.

[0049] The memory 51 may include a high-speed random access memory (RAM), and may also include a non-volatile memory, such as at least one disk memory. The communication connection between the system network element and at least one other network element is realized through at least one communication interface 53 (which may be wired or wireless), and the Internet, wide area network, local area network, metropolitan area network, etc. may be used.

[0050] The bus 52 may be an ISA bus, a PCI bus, or an EISA bus, etc. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 5 Only one bidirectional arrow is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0051] Among them, the memory 51 is used to store programs, and the processor 50 executes the program after receiving the execution instruction. The method executed by the device for flow process definition disclosed in any embodiment of the above-mentioned embodiment of the present invention can be applied to the processor 50 or implemented by the processor 50.

[0052] The processor 50 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by the hardware integrated logic circuit or software instructions in the processor 50. The above processor 50 can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present invention can be implemented or executed. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor. The steps of the method disclosed in the embodiments of the present invention can be directly embodied as a hardware decoding processor to be executed, or can be executed by a combination of hardware and software modules in the decoding processor. The software module can be located in a mature storage medium in the field such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory 51, and the processor 50 reads the information in the memory 51 and completes the steps of the above method in combination with its hardware.

[0053] The computer program product of the readable storage medium provided in the embodiment of the present invention includes a computer-readable storage medium storing program code, and the instructions included in the program code can be used to execute the methods described in the previous method embodiments. The specific implementation can be referred to the previous method embodiments, which will not be repeated here.

[0054] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, electronic device, or network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0055] Finally, it should be noted that the above-described embodiments are only specific implementations of the present invention, which are used to illustrate the technical solutions of the present invention, rather than to limit them. The protection scope of the present invention is not limited thereto. Although the present invention is described in detail with reference to the above-described embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-described embodiments within the technical scope disclosed by the present invention, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A wake-up system for a driving recorder, characterized in that: The system comprises: a wake-up circuit, a system chip and a power chip, wherein the power chip is connected to the wake-up circuit and the system chip respectively; wherein, The wake-up circuit is used to receive a trigger signal sent by the signal interface, and when receiving the trigger signal, sends a pulse signal to the power chip to make the mainboard power enter the wake-up state, wherein when the mainboard power enters the wake-up state, it is briefly started within a preset time interval; The system chip is used to detect the type of trigger signal when the mainboard power supply is in the awake state, and when the detection result is a normal power trigger signal, send a system hold signal to the awake circuit to keep the system in the startup state; The power chip is used to manage the working status of the mainboard power supply.

2. The wake-up system of the driving recorder according to claim 1, characterized in that: The wake-up circuit includes: a signal interface set, the signal interface set includes: a first signal interface, a second signal interface and a third signal interface set; wherein, The first signal interface is used to receive a key control signal sent by a keyboard; The second signal interface is used to receive a system hold signal sent by the system chip; The third signal interface set includes: a preset number of third signal interfaces, and the third signal interface is used to receive a constant power trigger signal sent by a power button.

3. The wake-up system of the driving recorder according to claim 2, characterized in that: The wake-up circuit includes: a fast discharge circuit, and each of the third signal interfaces is connected to a corresponding fast discharge circuit respectively; wherein, The fast discharge circuit is used to reduce the time interval between two adjacent circuit wake-ups of the wake-up system of the driving recorder.

4. The wake-up system of the driving recorder according to claim 3, characterized in that: The fast discharge circuit comprises: a capacitor, a first resistor and a second resistor, the capacitor is connected to the third signal interface, and the first resistor and the second resistor are connected in parallel to both ends of the capacitor; wherein, The capacitor is used to send the pulse signal to the power chip when receiving a trigger signal whose high level duration reaches a preset time threshold; The first resistor and the second resistor are used to quickly discharge the capacitor to shorten the preparation time for the next circuit wake-up.

5. The wake-up system of the driving recorder according to claim 4, characterized in that: The fast discharge circuit includes: a protection diode, a first isolation diode and a second isolation diode, the protection diode is connected to the second resistor, the first isolation diode is respectively connected to the third signal interface and the capacitor, and the second isolation diode is respectively connected to the capacitor and the power chip; wherein, The protection diode is used to suppress the reverse current generated by the capacitor during the discharge process, and after the capacitor is discharged and the signal of the third signal interface disappears, suppress the negative voltage caused by the voltage drop across the capacitor, so as to protect the fast discharge circuit; The first isolation diode and the second isolation diode are used to prevent the superposition of multiple signals and interfere with the normal power trigger signal of the third signal interface.

6. A system control method, characterized in that: The method is applied to a wake-up system of a driving recorder, and the method comprises: When receiving a trigger signal sent by the third signal interface, charging the capacitor in the fast discharge circuit so that the voltage across the capacitor is increased; When the voltage across the capacitor increases to the same level as the trigger signal, a pulse signal is generated; The pulse signal is used to make the mainboard power enter the awake state, and when the mainboard power is in the awake state, the trigger signal type is detected, so that when the detection result is a normal power trigger signal, the level of the system hold signal is raised to keep the system in the startup state.

7. The system control method according to claim 6, characterized in that: Before the step of receiving the trigger signal sent by the third signal interface, the method includes: Obtaining preset parameter configuration information, wherein the preset parameter configuration information includes a target high-level wake-up duration and a target trigger interval for a second wake-up; The parameter configuration information is used to adjust the capacitance of the capacitor and the resistance of the first resistor and the second resistor in the fast discharge circuit to determine the target capacitance of the capacitor and the target resistance of the first resistor and the second resistor.

8. The system control method according to claim 7, characterized in that: The step of using the parameter configuration information to adjust the capacitance of the capacitor in the fast discharge circuit and the resistance values ​​of the first resistor and the second resistor to determine the target capacitance of the capacitor and the target resistance values ​​of the first resistor and the second resistor includes: By increasing the capacitance of the capacitor, the high-level wake-up time of the fast discharge circuit is increased, and by reducing the resistance of the first resistor and the second resistor, the triggering interval of the secondary wake-up is reduced; When the high-level wake-up duration reaches the target high-level wake-up duration, determining the capacitance as the target capacitance; When the triggering interval of the secondary wake-up reaches the target triggering interval, the resistance value is determined as the target resistance value.

9. An electronic device, characterized in that: The method comprises a processor and a memory, wherein the memory stores computer executable instructions that can be executed by the processor, and the processor executes the computer executable instructions to implement the method according to any one of claims 7 to 8.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are called and executed by a processor, the computer-executable instructions prompt the processor to implement the method according to any one of claims 7 to 8.

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