Priority-selectable safety state control system and method
By introducing priority-selectable safety state control into the vehicle lighting control system and utilizing both communication and hard-wired signals, the safety hazards and poor user experience of traditional vehicle lighting control systems in the event of failure are solved, achieving highly reliable and flexible vehicle lighting control.
Patent Information
- Application Number
- CN202511432218.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-09
- Publication Date
- 2025-11-18
AI Technical Summary
Traditional vehicle lighting control systems cannot illuminate in normal mode after hard wiring or communication failures, resulting in significant safety hazards and a poor user experience.
The system employs a priority-selectable safety status control system, which controls the vehicle lights by using both communication signals and hard-wired signals. It includes a safety status monitoring module, a triggering module, a priority switching module, and a drive module, enabling flexible switching of signal priorities and fault tolerance.
It improves the reliability of the control link, reduces security risks, enhances the system's fault tolerance, and improves user experience and design flexibility.
Smart Images
Figure CN120980741A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a priority-selectable safety status control system and method, belonging to the field of vehicle lighting control technology. Background Technology
[0002] In existing technologies, vehicle bodies mostly control the illumination of various headlight functions through either hard wiring or communication. When hard wiring control or communication control fails, the headlights default to a preset safety mode and cannot be controlled to illuminate in normal mode. At this time, the vehicle body completely loses control over the normal functions and safety mode of the headlights.
[0003] The vehicle body controls the illumination of various headlight functions through either hard wiring or communication. This control chain is relatively simple and has a high risk of failure. When the hard wiring or communication fails, the vehicle body completely loses control over the normal functions and safety modes of the headlights. The headlights cannot be illuminated in normal mode or can only automatically enter the preset constant-on mode. The vehicle body cannot know the on / off status of the headlights, posing a significant safety hazard. Furthermore, the vehicle body cannot control the on / off of the preset illumination modes of the headlights or control the switching of the headlights to safety states, resulting in a poor user experience. Summary of the Invention
[0004] The technical problem to be solved by the present invention is that, in view of the pain points of the traditional safety status control system and method mentioned above, such as high failure risk, large safety hazards and poor user experience, the present invention proposes a safety status control system and method with selectable priority.
[0005] The technical solution adopted by this invention to solve its technical problem is: The present invention provides a priority-selectable safety status control system, including a safety status monitoring module, a safety status triggering module, a priority switching module, a driving module, and a light source load; The safety status monitoring module is used to receive communication signals and hard-wire signals sent by the vehicle body, read the analog voltage values of the communication signals and hard-wire signals, and then send the analog voltage values of the communication signals and hard-wire signals to the drive module. The safety status triggering module is used to receive the hard wire signal sent by the vehicle body, and send a safety mode switch signal to the drive module according to the hard wire signal; The drive module is used to determine whether the communication signal is valid based on the analog voltage value of the communication signal, and to determine whether the hard wire signal is valid based on the analog voltage value of the hard wire signal. It also feeds back the determination results of the communication signal and the hard wire signal to the vehicle body, drives the light source load to turn the safety mode on or off according to the safety mode switch signal, and sends a priority control signal to the priority switching module through register configuration. The priority switching module is used to switch the priority of communication signals and hard-wired signals according to the priority control signal, generate a priority switching signal, and then send the priority switching signal to the security state triggering module.
[0006] Furthermore, the safety status monitoring module includes a communication input detection module and an analog input detection module, and the hard-wired signal includes an analog signal; The communication input detection module is used to receive communication signals sent by the vehicle body, read the analog voltage value of the communication signal, and then send the analog voltage value of the communication signal to the drive module. The analog input detection module is used to receive the analog signal in the hard-wired signal, read the analog voltage value of the analog signal in the hard-wired signal, and then send the analog voltage value of the analog signal in the hard-wired signal to the drive module.
[0007] Furthermore, the safety state triggering module includes a digital signal triggering module, and the hard-wired signal includes a digital signal; the digital signal triggering module is used to receive the digital signal in the hard-wired signal and control the safety mode switch of the light source load according to the digital signal.
[0008] Furthermore, the priority switching module includes a MOSFET Q1, a resistor R1, and a capacitor C1; The gate of the MOS transistor Q1 is connected to the output terminal of the driving module, the drain of the MOS transistor Q1 is connected to the input terminal of the digital signal triggering module, and the source of the MOS transistor Q1 is grounded. One end of the capacitor C1 is connected to the gate of the MOSFET Q1, and the other end is grounded; One end of the resistor R1 is connected to the gate of the MOSFET Q1, and the other end is connected to the power supply of the drive module.
[0009] Furthermore, the priority control signal includes a floating signal and a pulled-low signal. The floating signal is used to control the input terminal of the digital signal triggering module to be grounded, and the pulled-low signal is used to control the input terminal of the digital signal triggering module to be connected to a hard-wired signal.
[0010] Furthermore, it also includes a multiplexing module for matching multiple light source loads.
[0011] Furthermore, it also includes a communication signal protection module, which is used to receive communication signals from the vehicle body, perform electrostatic protection and filtering on the communication signals, and send the electrostatically protected and filtered communication signals to the safety status monitoring module.
[0012] Furthermore, it also includes a hard wire signal protection module, which is used to receive hard wire signals from the vehicle body, and to perform electrostatic protection, filtering, reverse connection protection and voltage limiting on the hard wire signals, and to send the hard wire signals that have undergone electrostatic protection, filtering, reverse connection protection and voltage limiting to the safety status monitoring module and the safety status triggering module.
[0013] Another aspect of the present invention provides a safety state control method, comprising the following steps: When both the communication signal and the hard-wire signal are detected to be valid, the driver module outputs a priority control signal and sends the priority control signal to the priority switching module. The priority switching module then switches the priority of the communication signal and the hard-wire signal according to the priority control signal. When a communication signal failure is detected and a hard-wired signal is valid, the light source load is controlled to switch between normal mode and safety mode by sending a hard-wired signal. When a hard-wired signal failure is detected and a communication signal is valid, the light source load is controlled to switch between normal mode and safety mode by sending a communication signal.
[0014] Furthermore, the priority switching module switches the priorities of communication signals and hard-wired signals according to the priority control signal, including: When the priority control signal is a floating signal, the input of the digital signal trigger module is controlled to be low by the priority switching module, and the priority of the communication signal is higher than that of the hard-wired signal. When the priority control signal is pulled low, the input of the digital signal trigger module is controlled to be high by the priority switching module, and the priority of the hard-wired signal is higher than that of the communication signal.
[0015] The beneficial effects of this invention are: 1. Reduced failure risk: By controlling the vehicle lights through the coexistence of communication signals and hard-wired signals, a reliable control link is still available even if either the communication signal or the hard-wired signal fails, thus improving the reliability of the control link and reducing the failure risk.
[0016] 2. Reduced safety hazards: When the hard wire signal or communication signal fails, the driver module feeds back the information about the failure to the vehicle body, allowing the vehicle body to know the current status of the headlights and reducing safety hazards.
[0017] 3. Enhanced system fault tolerance and improved user experience: When either the communication signal or the hard-wired signal fails, the user can still control the normal mode switch and the safety mode switch of the lights. This enables the system to maintain uninterrupted and reliable control through another valid path even if a single path signal fails, thus maintaining effective operation of the vehicle lights' normal functions and safety mode, and enhancing the system's fault tolerance.
[0018] 4. Improved design flexibility and adaptability: It enables the adjustment of the priority of communication signals and hard-wired signals through register configuration, overcoming the shortcomings of poor flexibility and difficulty in modification of traditional hardware fixed priorities, improving the flexibility of system design and simplifying the production process. Attached Figure Description
[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0020] Figure 1 This is a schematic block diagram of the safety status control system according to Embodiment 1 of the present invention; Figure 2 This is a circuit diagram of the communication signal protection module according to Embodiment 1 of the present invention; Figure 3 This is a circuit schematic diagram of the hard-wired signal protection module according to Embodiment 1 of the present invention; Figure 4 This is an example circuit schematic diagram of the safety status monitoring module, safety status triggering module, priority switching module, and driving module according to Embodiment 1 of the present invention; Figure 5 This is a circuit diagram of the light source load according to Embodiment 1 of the present invention; Figure 6 This is a circuit schematic diagram of the multiplexing module according to Embodiment 1 of the present invention; Figure 7 This is a flowchart of the safety status control method according to Embodiment 2 of the present invention. Detailed Implementation
[0021] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.
[0022] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.
[0023] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.
[0024] For ease of understanding, the inventive concept will be described in its entirety before a detailed description of the embodiments of the present invention: This invention provides a priority-selectable safety status control system and method, aiming to solve the problems of high failure risk, significant safety hazards, and poor user experience in traditional safety status control systems and methods. This invention controls lighting functions through a combination of communication and hard-wired signals. Even if one of the communication or hard-wired signals fails, a reliable control link still exists, improving the reliability of the control link. By setting up a safety status monitoring module, when either communication or hard-wired signal fails, feedback can be promptly sent to the vehicle body, reducing safety hazards. When the vehicle body detects a hard-wired signal failure, it controls the normal mode and safety mode switches of the lighting fixtures via communication signals; when the vehicle body detects a communication signal failure, it controls the normal mode switch of the lighting fixtures via hard-wired signals, and the safety status trigger module controls whether the lighting fixtures enter safety mode. Users can still control the normal and safety modes of the lighting fixtures. By setting up a priority switching module, the priority of communication and hard-wired control can be switched arbitrarily, providing high flexibility and improving efficiency.
[0025] Example 1 like Figure 1As shown, this embodiment provides a priority-selectable safety status control system, including a communication signal protection module, a hard-wired signal protection module, a safety status monitoring module, a safety status triggering module, a priority switching module, a drive module, and a light source load.
[0026] In some feasible implementations, such as Figure 2 As shown, the communication signal protection module is used to receive the communication signals from the vehicle body, perform electrostatic protection and filtering on the communication signals, and then send the communication signals after electrostatic protection and filtering to the safety status monitoring module.
[0027] In some feasible implementations, such as Figure 3 As shown, the hard wire signal protection module is used to receive hard wire signals from the vehicle body and perform electrostatic protection, filtering, reverse connection protection, and voltage limiting on the hard wire signals.
[0028] Specifically, the hard-wire signal protection module includes an electrostatic discharge (ESD) protection and filtering module, a first reverse connection protection and voltage limiting module, and a second reverse connection protection and voltage limiting module. The first reverse connection protection and voltage limiting module is used to perform reverse connection protection and voltage limiting processing on the hard-wire signal that has undergone ESD protection and filtering, and then sends the reverse connection protection and voltage limiting processed hard-wire signal to the analog input detection module; the second reverse connection protection and voltage limiting module is used to perform reverse connection protection and voltage limiting processing on the hard-wire signal that has undergone ESD protection and filtering, and then sends the reverse connection protection and voltage limiting processed hard-wire signal to the digital signal triggering module.
[0029] Specifically, the first reverse connection protection and voltage limiting protection module and the second reverse connection protection and voltage limiting protection module can convert the hard-wired signal into a stable 0V or 5V voltage, and transmit the stable voltage to the analog input detection module and the digital signal triggering module, respectively.
[0030] In some feasible implementations, the safety status monitoring module receives communication signals and hard-wired signals sent by the vehicle body, reads the analog voltage values of the communication signals and hard-wired signals, and then sends these values to the drive module. Safety status refers to the lamp entering a preset safety mode, such as a constant-on mode, when the normal function of the lamp fails.
[0031] Specifically, reading the analog voltage values of the communication signal and the analog voltage values of the hard-wired signal is used to detect whether the communication signal and the hard-wired signal are valid. When a low-level analog voltage value is detected, it indicates that the signal is invalid; when a high-level analog voltage value is detected, it indicates that the signal is valid. When the hard-wired signal or communication signal fails, it means that the normal function of the lamp on the hard-wired or communication link has failed. At this time, the lamp may enter a preset safety mode, such as a constant-on mode. Therefore, this embodiment monitors the safety status of the lamp by detecting whether the hard-wired signal and communication signal are invalid.
[0032] Specifically, the safety status monitoring module includes a communication input detection module and an analog input detection module, where the hard-wired signals include analog signals. The communication input detection module receives communication signals sent by the vehicle body, reads the analog voltage value of the communication signal, and then sends the analog voltage value of the communication signal to the drive module. The analog input detection module receives the analog signal from the hard-wired signals, reads the analog voltage value of the analog signal from the hard-wired signals, and then sends the analog voltage value of the analog signal from the hard-wired signals to the drive module. For example, when the line is disconnected, a signal failure occurs, and the analog voltage value read by the safety status monitoring module is low.
[0033] In some feasible implementations, the safety state triggering module is used to receive hard-wired signals sent by the vehicle body and send a safety mode switch signal to the drive module based on the hard-wired signals.
[0034] Specifically, the safety status triggering module includes a digital signal triggering module, and the hard-wired signal includes a digital signal. The digital signal triggering module receives the digital signal from the hard-wired signal and controls the safety mode switch of the light source load according to the digital signal. When the digital signal is low, it controls the light source load to open the safety mode; when the digital signal is low, it controls the light source load to close the safety mode. In traditional vehicle lighting control technology, when the communication signal fails, the lights default to a preset constant-on mode, and the vehicle body completely loses control over the lighting status. In this embodiment, through the safety status triggering module, the user can still control the opening or closing of the safety mode of the light source load, improving the user experience and enhancing safety.
[0035] In some feasible implementations, the drive module is used to determine whether the communication signal is valid based on the analog voltage value of the communication signal, determine whether the hard wire signal is valid based on the analog voltage value of the hard wire signal, and feed back the determination results of the communication signal and the hard wire signal to the vehicle body, drive the light source load to turn the safety mode on or off according to the safety mode switch signal, and send the priority control signal to the priority switching module through register configuration.
[0036] Specifically, the drive module feeds back the validity results of the communication signal and the hard-wired signal to the vehicle body, reducing safety hazards. Priority control signals include a floating signal and a pulled-low signal. The drive module configures the output of either a floating or pulled-low signal through registers and sends it to the priority switching module. The floating signal grounds the input of the digital signal trigger module, preventing hard-wired triggering; in this case, the communication signal has a higher priority than the hard-wired signal. The pulled-low signal connects the input of the digital signal trigger module to the hard-wired signal, in which case the hard-wired signal has a higher priority than the communication signal.
[0037] In some feasible implementations, the priority switching module is used to switch the priority of communication signals and hard-wired signals according to the priority control signal, generate a priority switching signal, and then send the priority switching signal to the security state triggering module.
[0038] Specifically, such as Figure 4 As shown, the priority switching module includes a MOSFET Q1, a resistor R1, and a capacitor C1. The gate of the MOSFET Q1 is connected to the output terminal of the drive module, the drain of the MOSFET Q1 is connected to the input terminal of the digital signal trigger module, and the source of the MOSFET Q1 is grounded. One end of the capacitor C1 is connected to the gate of the MOSFET Q1, and the other end is grounded. One end of the resistor R1 is connected to the gate of the MOSFET Q1, and the other end is connected to the power supply of the drive module.
[0039] Specifically, the priority switching signal includes a high-level signal and a low-level signal. When the priority control signal is floating, the corresponding priority switching signal is a low-level signal; when the priority control signal is pulled low, the corresponding priority switching signal is a high-level signal.
[0040] Specifically, the working principle of the priority switching module for switching the priority between communication signals and hard-wired signals is analyzed as follows: When the priority control signal is floating, the gate of MOSFET Q1 is high, MOSFET Q1 is turned on, and the hard-wired signal is short-circuited to ground by MOSFET Q1. The input terminal of the digital signal trigger module receives a 0V voltage, thus achieving a higher priority for the communication signal than the hard-wired signal. When the priority control signal is pulled low, the gate of MOSFET Q1 is low, MOSFET Q1 is not turned on, and there is no short-circuit effect on the hard-wired signal. The hard-wired signal can reach the input terminal of the digital signal trigger module, thus achieving a higher priority for the hard-wired signal than the communication signal. This enables arbitrary switching of the priority between communication signal control and hard-wired signal control, improving the flexibility and adaptability of the design.
[0041] like Figure 4The diagram shown is a specific example of the circuit schematic of the communication input detection module, analog input detection module, digital signal triggering module, priority switching module, and drive module. It is worth noting that in this example, the communication input detection module, analog input detection module, digital signal triggering module, and drive module are integrated into the same chip, TLD7002. This example does not limit the implementation method of the technical solution in this embodiment, and those skilled in the art can implement it in other ways. Pin 2 (GPIN0) of the TLD7002 chip U1 is used as the analog input detection interface, corresponding to the analog input detection module in this embodiment. Pin 2 of the TLD7002 chip U1 is connected to the output terminal of the first reverse connection protection and voltage limiting protection module. Pin 3 (GPIN1) of the TLD7002 chip U1 is used as the digital signal triggering interface, corresponding to the digital signal triggering module in this embodiment. Pin 3 of the TLD7002 chip U1 is connected to the output terminal of the second reverse connection protection and voltage limiting protection module, and pin 3 of the TLD7002 chip U1 is also connected to the output terminal of the priority switching module. Pins 23 and 24 of the TLD7002 chip U1 are used as communication input detection interfaces, corresponding to the communication input detection module in this embodiment. Pins 23 and 24 of the TLD7002 chip U1 are connected to the output terminal of the communication signal protection module.
[0042] In some feasible implementations, such as Figure 5 As shown, the light source load is an LED string load, which can use one, two, or more LEDs connected in a common anode configuration. It is suitable for functions such as position lights, brake lights, turn signals, reversing lights, daytime running lights, and rear fog lights. The light source load is used to control the normal mode or safety mode illumination according to the drive module. Normal mode illumination means that the headlights are turned on for normal functions, such as low beam headlights, high beam headlights, and turn signals. Safety mode illumination means that the headlights enter a preset safety state, such as a constant-on mode, after the normal functions fail.
[0043] In some feasible implementations, such as Figure 6 As shown, the safety status control system also includes a multiplexing module, which is used for... Figure 4 The expansion and reuse of the middle module can be used to match a large number of light source loads, which can solve the problems of insufficient channels and excessive power of the drive module caused by a large number of loads, while enriching the vehicle light functions and lighting effects in the safety mode.
[0044] Example 2 like Figure 7 As shown, this embodiment provides a safety state control method for a safety state control system as described in Embodiment 1, comprising the following steps: When both communication signals and hard-wired signals are detected as valid, the driver module outputs a priority control signal and sends it to the priority switching module. The priority switching module then switches the priority between the communication and hard-wired signals based on the priority control signal. Adjusting the priority of the communication and hard-wired signals improves design flexibility. Specifically, when the priority control signal is floating, the priority switching module controls the input of the digital signal trigger module to be low, giving the communication signal a higher priority than the hard-wired signal. When the priority control signal is pulled low, the priority switching module controls the input of the digital signal trigger module to be high, giving the hard-wired signal a higher priority than the communication signal.
[0045] For example, when the vehicle is in a completely normal state, that is, the vehicle body communication is working properly and the various hard-wired switches connected to the headlights are also working properly, assuming the priority is set to communication signals take precedence over hard-wired signals, if the driver operates the system and turns on the right turn signal through a switch (which sends a communication signal), and at the same time operates a separate hard-wired switch to try to turn on the left turn signal, the system will execute the instruction of the communication signal and only the right turn signal will flash.
[0046] When a communication signal failure is detected and a hard-wired signal is valid, the light source load is controlled to switch between normal mode and safety mode by sending a hard-wired signal.
[0047] For example, when vehicle communication fails but the hardwire is intact, the driver presses the hazard light switch (hardwire signal), and the drive module drives all turn signals to flash simultaneously according to the hazard light switch signal (preset safety mode), or the driver presses the brake pedal (hardwire signal), and the drive module drives the brake lights to illuminate normally (normal mode).
[0048] When a hard-wired signal failure is detected but the communication signal remains valid, the system controls the light source load to switch between normal and safety modes by sending a communication signal. This means that even if either the communication signal or the hard-wired signal fails, a reliable control link still exists, allowing the user to still control the switching between normal and safety modes, thus improving both user experience and safety.
[0049] For example, when the vehicle's hard-wired signal fails but communication is normal, the driver operates the low beam headlight switch (as a communication signal), and the drive module drives the headlights to illuminate according to the low beam headlight switch signal (normal mode), or the driver clicks the button to turn on the hazard warning lights on the vehicle's display screen (as a communication signal), and the drive module drives the headlights to enter hazard flashing mode (safe mode).
[0050] It is not difficult to see that this embodiment is a method embodiment corresponding to the first embodiment, and this embodiment can be implemented in conjunction with the first embodiment. The relevant technical details mentioned in the first embodiment are still valid in this embodiment, and will not be repeated here to reduce repetition. Accordingly, the relevant technical details mentioned in this embodiment can also be applied to the first embodiment.
[0051] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined by the scope of the claims.
Claims
1. A priority-selectable safety status control system, characterized in that, It includes a safety status monitoring module, a safety status triggering module, a priority switching module, a driver module, and a light source load; The safety status monitoring module is used to receive communication signals and hard-wire signals sent by the vehicle body, read the analog voltage values of the communication signals and hard-wire signals, and then send the analog voltage values of the communication signals and hard-wire signals to the drive module. The safety status triggering module is used to receive the hard wire signal sent by the vehicle body, and send a safety mode switch signal to the drive module according to the hard wire signal; The drive module is used to determine whether the communication signal is valid based on the analog voltage value of the communication signal, and to determine whether the hard wire signal is valid based on the analog voltage value of the hard wire signal. It also feeds back the determination results of the communication signal and the hard wire signal to the vehicle body, drives the light source load to turn the safety mode on or off according to the safety mode switch signal, and sends a priority control signal to the priority switching module through register configuration. The priority switching module is used to switch the priority of communication signals and hard-wired signals according to the priority control signal, generate a priority switching signal, and then send the priority switching signal to the security state triggering module.
2. The priority-selectable safety status control system according to claim 1, characterized in that, The safety status monitoring module includes a communication input detection module and an analog input detection module, and the hard-wired signal includes an analog signal; The communication input detection module is used to receive communication signals sent by the vehicle body, read the analog voltage value of the communication signal, and then send the analog voltage value of the communication signal to the drive module. The analog input detection module is used to receive the analog signal in the hard-wired signal, read the analog voltage value of the analog signal in the hard-wired signal, and then send the analog voltage value of the analog signal in the hard-wired signal to the drive module.
3. The priority-selectable safety status control system according to claim 2, characterized in that, The safety status triggering module includes a digital signal triggering module, and the hard-wired signal includes a digital signal; the digital signal triggering module is used to receive the digital signal in the hard-wired signal and control the safety mode switch of the light source load according to the digital signal.
4. The priority-selectable safety status control system according to claim 3, characterized in that, The priority switching module includes a MOSFET Q1, a resistor R1, and a capacitor C1; The gate of the MOS transistor Q1 is connected to the output terminal of the driving module, the drain of the MOS transistor Q1 is connected to the input terminal of the digital signal triggering module, and the source of the MOS transistor Q1 is grounded. One end of the capacitor C1 is connected to the gate of the MOSFET Q1, and the other end is grounded; One end of the resistor R1 is connected to the gate of the MOSFET Q1, and the other end is connected to the power supply of the drive module.
5. The priority-selectable safety status control system according to claim 3, characterized in that, The priority control signal includes a floating signal and a pull-low signal. The floating signal is used to control the input terminal of the digital signal trigger module to be grounded, and the pull-low signal is used to control the input terminal of the digital signal trigger module to be connected to a hard-wired signal.
6. The priority-selectable safety status control system according to claim 1, characterized in that, It also includes a multiplexing module for matching multiple light source loads.
7. The priority-selectable safety status control system according to claim 1, characterized in that, It also includes a communication signal protection module, which is used to receive communication signals from the vehicle body, perform electrostatic protection and filtering on the communication signals, and send the electrostatic protected and filtered communication signals to the safety status monitoring module.
8. The priority-selectable safety status control system according to claim 1, characterized in that, It also includes a hard wire signal protection module, which is used to receive hard wire signals from the vehicle body and perform electrostatic protection, filtering, reverse connection protection and voltage limiting on the hard wire signals. The hard wire signals that have undergone electrostatic protection, filtering, reverse connection protection and voltage limiting are then sent to the safety status monitoring module and the safety status triggering module.
9. A safety state control method for a priority-selectable safety state control system as described in any one of claims 1 to 8, characterized in that, Includes the following steps: When both the communication signal and the hard-wire signal are detected to be valid, the driver module outputs a priority control signal and sends the priority control signal to the priority switching module. The priority switching module then switches the priority of the communication signal and the hard-wire signal according to the priority control signal. When a communication signal failure is detected and a hard-wired signal is valid, the light source load is controlled to switch between normal mode and safety mode by sending a hard-wired signal. When a hard-wired signal failure is detected and a communication signal is valid, the light source load is controlled to switch between normal mode and safety mode by sending a communication signal.
10. The safety status control method according to claim 9, characterized in that, The priority switching module switches the priorities of communication signals and hard-wired signals according to the priority control signal, including: When the priority control signal is a floating signal, the input of the digital signal trigger module is controlled to be low by the priority switching module, and the priority of the communication signal is higher than that of the hard-wired signal. When the priority control signal is pulled low, the input of the digital signal trigger module is controlled to be high by the priority switching module, and the priority of the hard-wired signal is higher than that of the communication signal.