Driver fatigue wake-up method, system, and vehicle

Abstract

The application discloses a driver fatigue awakening method, a system and a vehicle, and belongs to the technical field of vehicles. After the vibration of a vehicle cabin reaches a preset time, a second fatigue level of a driver is determined again, the second fatigue level is compared with a first fatigue level, and then the fatigue degree change of the driver is judged. When the fatigue degree rises or remains unchanged, the existing vibration parameters are insufficient to change the fatigue degree of the driver, so the vibration parameters are increased and the corresponding relationship is corrected to ensure that the new vibration parameters are enabled when the active suspension next time runs the awakening process, and the above steps are repeated. After the above steps are repeated, when it is determined that the fatigue degree of the driver decreases, the current vibration parameters are sufficient to change the fatigue degree of the driver, so the vibration parameters can be gradually reduced to avoid affecting the driving attitude of the vehicle and causing danger. Therefore, the vibration parameters of the active suspension are continuously optimized according to the change of the fatigue degree of the driver, and the awakening effect of the active suspension on the driver is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and in particular to a method, system, and vehicle for waking up a driver from fatigue. Background Technology

[0002] Driver fatigue is a major hidden danger to road traffic safety. Existing driver fatigue wake-up technologies mainly rely on cabin intervention and indirect chassis intervention. Cabin wake-up technologies often use methods such as sound and light alarms, seat vibration, and fragrance spraying, which depend on visual, auditory, or single tactile stimulation and are easily interfered with by the driving environment, such as high-speed noise and bright light. In some scenarios, they can also distract the driver. Chassis wake-up technologies often involve applying pulse braking force to the braking system and increasing resistance to the steering system, which is an indirect wake-up method and has a poor effect on waking up the driver. Summary of the Invention

[0003] The present invention aims to solve the technical problems existing in the above-mentioned related technologies, and proposes a driver fatigue wake-up method, system and vehicle. By continuously optimizing the vibration parameters of the active suspension based on changes in the driver's fatigue level, the wake-up effect of the active suspension on the driver is greatly improved.

[0004] According to a first aspect of the present invention, a driver fatigue wake-up method is applied to a vehicle equipped with an active suspension, the driver fatigue wake-up method comprising: Obtain the driver's first fatigue level and the operating condition of the vehicle; The correspondence between the first fatigue level, the working condition, and the vibration parameters is obtained based on the preset data of the vehicle. The vibration parameters are determined based on the correspondence, and the active suspension is controlled to operate according to the vibration parameters. Wait for a preset time, then obtain the driver's second fatigue level; The driver's fatigue level is determined to increase, remain unchanged, or decrease based on the second fatigue level and the first fatigue level. When it is determined that the fatigue level increases or remains unchanged, the active suspension is controlled to increase the vibration parameters and correct the corresponding relationship; Repeat the above steps until the fatigue level decreases, and control the active suspension to gradually reduce the vibration parameters.

[0005] The driver fatigue wake-up method according to embodiments of the present invention has at least the following beneficial effects: After determining the first fatigue level and operating condition, the corresponding vibration parameters are found from the correspondence, and then the active suspension operates according to the vibration parameters to cause vibration in the passenger compartment, thereby waking up the driver directly and improving the wake-up effect. After the passenger compartment vibration reaches a preset time, the second fatigue level of the driver is re-determined, and the second fatigue level is compared with the first fatigue level to determine the change in the driver's fatigue level. When the fatigue level increases or remains unchanged, it proves that the driver has not been woken up, that is, the existing vibration parameters are insufficient to change the driver's fatigue level. Therefore, the vibration parameters are increased and the correspondence is corrected to ensure that the active suspension uses new vibration parameters when running the wake-up process next time, and the above steps are repeated. After repeating the above steps, when it is determined that the driver's fatigue level decreases, it proves that the driver has been woken up, that is, the current vibration parameters are sufficient to change the driver's fatigue level. Therefore, the vibration parameters can be gradually reduced to avoid affecting the vehicle's driving posture and causing danger. Therefore, by continuously optimizing the vibration parameters of the active suspension based on changes in the driver's fatigue level, the wake-up effect of the active suspension on the driver is greatly improved.

[0006] According to some embodiments of the present invention, controlling the active suspension to operate according to the vibration parameters includes: The real-time operating conditions of the vehicle are obtained, and the vehicle is determined to be on a curve or slope based on the real-time operating conditions. When the vehicle is on the curve or the slope, the control is paused and the active suspension operates according to the vibration parameters. Until the vehicle is no longer in the curve or the slope, the control is re-executed and the active suspension operates according to the vibration parameters.

[0007] According to some embodiments of the present invention, the vehicle has a cabin fatigue driving wake-up function, and the control of the active suspension to operate according to the vibration parameters further includes: When the vehicle is on the curve or the slope, control the vehicle to activate the cabin fatigue driving wake-up function.

[0008] According to some embodiments of the present invention, controlling the active suspension to operate according to the vibration parameters includes: Obtain the measured vibration parameters of the active suspension, and obtain the vibration deviation based on the measured vibration parameters and the vibration parameters; Vibration compensation is obtained based on the vibration deviation, and target vibration parameters are obtained based on the vibration compensation and the vibration parameters. The active suspension is controlled to operate according to the target vibration parameters.

[0009] According to some embodiments of the present invention, the vibration parameters include frequency and amplitude, and controlling the active suspension to improve the vibration parameters includes: The current vehicle speed is obtained based on the operating conditions, and then compared with a speed threshold. When it is determined that the current vehicle speed is lower than the vehicle speed threshold, the active suspension is controlled to increase the magnitude of the increase. When it is determined that the current vehicle speed is not lower than the vehicle speed threshold, the active suspension is controlled to increase the frequency.

[0010] According to some embodiments of the present invention, the vehicle has a cabin fatigue driving wake-up function. After executing the control of the active suspension to increase the vibration parameters, the driver fatigue wake-up method further includes: Determine whether the vibration parameter is greater than the parameter threshold; When the vibration parameter is greater than the parameter threshold, the value of the vibration parameter is adjusted to be equal to the value of the parameter threshold, and the vehicle is controlled to activate the cabin fatigue driving wake-up function.

[0011] According to some embodiments of the present invention, the vibration parameters include frequency and amplitude, and controlling the active suspension to gradually reduce the vibration parameters includes: Control the active suspension to maintain the frequency; The active suspension is controlled to gradually reduce the amplitude.

[0012] According to some embodiments of the present invention, obtaining the driver's first fatigue level includes: Obtain the driver's status information; The first fatigue level is determined based on the state information, the first state condition, the second state condition, and the third state condition.

[0013] A driver fatigue wake-up system according to a second aspect of an embodiment of the present invention includes: At least one processor; And a memory storing instructions that, when executed by at least one processor, perform the driver fatigue wake-up method described in the first aspect embodiment above.

[0014] The driver fatigue wake-up system according to embodiments of the present invention has at least the following beneficial effects: after the vibration of the passenger compartment reaches a preset time, the driver's second fatigue level is re-determined, the second fatigue level is compared with the first fatigue level, and then the change in the driver's fatigue level is judged; when the fatigue level increases or remains unchanged, it proves that the driver has not been woken up, that is, the existing vibration parameters are insufficient to change the driver's fatigue level, so the vibration parameters are increased and the corresponding relationship is corrected to ensure that the new vibration parameters are used when the active suspension runs the wake-up process next time, and the above steps are repeated; after repeating the above steps, when it is determined that the driver's fatigue level decreases, it proves that the driver has been woken up, that is, the current vibration parameters are sufficient to change the driver's fatigue level, so the vibration parameters can be gradually reduced to avoid affecting the vehicle's driving posture and causing danger; therefore, by continuously optimizing the vibration parameters of the active suspension based on the change in the driver's fatigue level, the wake-up effect of the active suspension on the driver is greatly improved.

[0015] According to a third aspect of the present invention, a vehicle includes the driver fatigue wake-up system described in the second aspect of the above embodiments.

[0016] Since the vehicle adopts all the technical solutions of the driver fatigue wake-up system of the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be repeated here. Attached Figure Description

[0017] Figure 1 This is a flowchart of a driver fatigue wake-up method according to an embodiment of the present invention; Figure 2 This is a flowchart of vibration parameters of a vehicle when it is stopped on a curve or slope in one embodiment of the present invention; Figure 3 This is a flowchart of a method for compensating for measured vibration parameters of an active suspension in one embodiment of the present invention; Figure 4 This is a flowchart of adjusting vibration parameters according to vehicle speed in one embodiment of the present invention; Figure 5 This is a flowchart illustrating the vibration parameters exceeding a parameter threshold in one embodiment of the present invention; Figure 6 This is a flowchart of reducing vibration parameters in one embodiment of the present invention; Figure 7 This is a flowchart for determining the first fatigue level in one embodiment of the present invention. Detailed Implementation

[0018] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0019] In the description of this invention, it should be understood that the terms front, back, up, down, axial, circumferential, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this 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. Therefore, they should not be construed as limiting this invention.

[0020] In the description of this invention, "multiple" means two or more; "greater than," "less than," and "exceeding" are understood to exclude the stated number; "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0021] In the description of this invention, it should be noted that terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0022] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are some embodiments of the present invention, not all embodiments.

[0023] Existing driver fatigue wake-up technologies primarily rely on cabin-level intervention and indirect chassis intervention. Neither uses "precisely triggering active chassis suspension action based on driver fatigue levels" as its core wake-up logic, and lacks a mechanism for adapting vehicle speed and operating conditions to the wake-up action. Cabin-level wake-up technologies often employ methods such as audible and visual alarms, seat vibration, and fragrance spraying, depending on visual, auditory, or tactile stimulation. These are easily affected by driving environment factors such as high-speed noise and bright light, and can distract the driver in some scenarios. Chassis-level wake-up technologies often involve applying pulse braking force to the braking system and increasing resistance in the steering system, representing indirect wake-up and failing to directly utilize the strong correlation between the suspension and driver's sensory experience. The few technologies involving the suspension use them only as auxiliary means, lacking precise linkage between fatigue levels and active suspension action, and lacking vehicle speed and operating condition adaptation logic. They indiscriminately activate the wake-up function, with suspension actions not specifically designed but merely adjusting for general driving conditions, failing to focus on the core need of "wake-up" and failing to resolve the conflict between wake-up and driving safety.

[0024] Existing technologies suffer from problems such as missing core components, poor wake-up effects, a serious imbalance between security and wake-up, inaccurate action execution, or insufficient adaptability.

[0025] The core deficiency is the lack of technical logic that directly triggers active suspension actions based on driver fatigue. Existing suspension actions are all condition-adaptive, such as bump filtering and high-speed stability, and no specific actions are designed to "awaken the driver," making it impossible to achieve efficient driver awakening through suspension sensory stimulation.

[0026] Poor wake-up effect: Cockpit-side wake-up is easily interfered with, and chassis-indirect wake-up feedback is weak. Neither is as direct as the physical stimulation transmitted directly by the suspension. Furthermore, there is no differentiated action design, and the wake-up effect is the same for mild, moderate, and severe fatigue.

[0027] There is a serious imbalance between safety and wake-up: Existing technology lacks wake-up constraints that are adapted to vehicle speed and operating conditions, and the wake-up function is activated indiscriminately. Under high-speed conditions, excessive suspension movement can easily lead to vehicle instability, while insufficient movement will cause the wake-up function to fail. Under special conditions such as curves and slopes, the wake-up action can easily cause loss of vehicle attitude control, posing a significant safety hazard.

[0028] Inaccurate action execution: Without a dedicated control logic for wake-up, the frequency and amplitude of actions are easily affected by road bumps, making it impossible to stably output effective wake-up actions, resulting in poor wake-up consistency.

[0029] Insufficient adaptability: The suspension action uses fixed parameters, which are neither adjusted according to driver fatigue level, nor dynamically optimized to match vehicle speed and operating conditions, nor are they optimized and adjusted in a timely manner according to each driver's wake-up tolerance level. Either the wake-up is ineffective, or it causes driver discomfort, resulting in low acceptance.

[0030] Based on this, the present invention provides a driver fatigue wake-up method, which uses the driver fatigue detection result as the sole core trigger condition to drive the suspension to actively perform a dedicated action to wake up the driver. A new wake-up safety threshold mechanism that adapts to vehicle speed and operating conditions is added. All other designs are to ensure the safe, effective and accurate implementation of this core function, and specifically solve the above-mentioned problems.

[0031] This addresses the lack of core logic in existing technologies for "fatigue-triggered active suspension wake-up" and fills the technological gap in directly waking up the suspension based on body sensation.

[0032] To address the issues of weak wake-up effects and susceptibility to interference, the system delivers sensory stimulation to the vehicle body through active suspension movements, without interfering with the driver's vision and hearing, resulting in a more direct and efficient wake-up.

[0033] To address the risk of instability caused by the disconnect between wake-up actions and vehicle speed conditions: By overcoming the limitations of indiscriminate activation, a "vehicle speed wake-up risk" model is established through real-vehicle testing. Differentiated wake-up thresholds and action parameters are set for high speed, low speed, curves, and slopes. The wake-up is stable at high speeds, strong at low speeds, and temporarily avoided in curves and slopes, upgrading wake-up from "effective" to "safe and effective".

[0034] To address the issue of inaccurate suspension wake-up actions, a dedicated control strategy was designed to resist road surface interference and ensure stable action output.

[0035] To address the issue of poor adaptability, the driver's fatigue level is determined based on the activation of the active suspension wake-up program. Then, the suspension vibration parameters are dynamically optimized to balance wake-up effectiveness and comfort.

[0036] refer to Figures 1 to 7 A driver fatigue wake-up method according to an embodiment of the present invention is described. This driver fatigue wake-up method is applicable to vehicles, especially vehicles equipped with active suspension. The driver fatigue wake-up method is described below with specific examples.

[0037] Reference Figure 1 As shown, the method for waking up a driver from fatigue includes, but is not limited to, the following steps: Step S100: Obtain the driver's first fatigue level and the vehicle's operating condition; Step S200: Obtain the correspondence between the first fatigue level, working condition and vibration parameters based on the vehicle's preset data; Step S300: Determine the vibration parameters according to the corresponding relationship, and control the active suspension to operate according to the vibration parameters; Step S400: Wait for a preset time and obtain the driver's second fatigue level; Step S500: Determine whether the driver's fatigue level increases, remains unchanged, or decreases based on the second fatigue level and the first fatigue level. Step S600: When it is determined that the fatigue level increases or remains unchanged, control the active suspension to increase the vibration parameters and correct the corresponding relationship; Step S700: Repeat the above steps until the fatigue level decreases, and control the active suspension to gradually reduce the vibration parameters.

[0038] In steps S100 and S400, when obtaining the first fatigue level and the second fatigue level, existing mature monitoring equipment in the vehicle cabin is reused, such as eye trackers, steering wheel grip force sensors, seat pressure sensors, heart rate sensors, etc., to collect relevant fatigue parameters such as driver eyelid closure, blinking frequency, grip stability, body posture, and heart rate variability coefficient.

[0039] Fatigue levels are categorized according to industry standards: mild fatigue (requires reminder to prevent further fatigue), moderate fatigue (requires active wake-up), and severe fatigue (requires strong wake-up). Each level corresponds to a specific fatigue parameter threshold, outputting a precise first and second fatigue level.

[0040] In step S200, the correspondence between the driver's first fatigue level, the vehicle's operating condition, and the vibration parameters of the active suspension is pre-stored before the vehicle leaves the factory. For example, a real vehicle test is conducted using the same model of vehicle to simulate the driver's first fatigue level and the vehicle's operating condition. Then, multiple different vibration parameters of the active suspension are set, and the vibration parameters preset inside the vehicle are determined through calibration. The correspondence between the first fatigue level, operating condition, and vibration parameters is established.

[0041] In step S300, the corresponding vibration parameters can be obtained based on the first fatigue level, working condition and corresponding relationship. Then the active suspension operates according to the vibration parameters, so that the carriage vibrates according to the vibration parameters to wake up the driver.

[0042] In step S400, after the active suspension vibrates the passenger compartment according to the vibration parameters and continues for a preset time, it is necessary to re-determine the driver's fatigue level, so it is necessary to obtain the second fatigue level.

[0043] In step S500, the second fatigue level and the first fatigue level need to be compared to determine the change in the driver's fatigue level.

[0044] When it is determined that the driver's fatigue level increases or remains unchanged, it proves that the driver has not been awakened, that is, the existing vibration parameters are insufficient to change the driver's fatigue level. Therefore, the vibration parameters are increased and the corresponding relationship is corrected to ensure that the new vibration parameters are used when the active suspension runs the wake-up process next time, and the above steps are repeated.

[0045] After repeating the above steps, once it is determined that the driver's fatigue level has decreased, it proves that the driver has been awakened. That is, the current vibration parameters are sufficient to change the driver's fatigue level. Therefore, the vibration parameters can be gradually reduced to avoid affecting the vehicle's driving posture and causing danger. However, the correspondence is no longer changed to ensure that the current vibration parameters are recorded in the correspondence so that when the driver experiences the same level of fatigue again, the vibration parameters in the corresponding relationship can be retrieved to ensure that the driver can be awakened.

[0046] Reference Figure 2 As shown, in some embodiments, step S300 above includes, but is not limited to, the following steps: Step S310: Obtain the real-time operating conditions of the vehicle and determine whether the vehicle is on a curve or slope based on the real-time operating conditions. Step S320: When the vehicle is on a curve or slope, the active suspension is suspended from operating according to the vibration parameters, and the vehicle is controlled to activate the cabin fatigue driving wake-up function. Step S330, until the vehicle is no longer on a curve or slope, re-execute the control of the active suspension to operate according to the vibration parameters.

[0047] When the active suspension operates according to the vibration parameters, the passenger compartment is in a state of vibration. It is necessary to assess the real-time operating condition of the vehicle to ensure that when the vehicle enters a curve or slope, the active suspension can temporarily reduce the vibration of the passenger compartment, ensuring that the vehicle is in a safe and stable state. The vehicle's cabin fatigue driving wake-up function should also be activated to wake up the driver.

[0048] Once the vehicle leaves the curve or slope, the active suspension restarts operating according to the vibration parameters to reawaken the driver.

[0049] Reference Figure 3 As shown, in some embodiments, step S300 above may include, but is not limited to, the following steps: Step S340: Obtain the measured vibration parameters of the active suspension, and obtain the vibration deviation based on the measured vibration parameters and the vibration parameters. Step S350: Obtain vibration compensation based on vibration deviation, and obtain target vibration parameters based on vibration compensation and vibration parameters; Step S360: Control the active suspension to operate according to the target vibration parameters.

[0050] While the vehicle is still traveling on the road, the vibration parameters of the active suspension are being monitored by the vehicle's walking suspension. The road causes interference to the vibration of the active suspension. The measured vibration parameters are acquired in real time, and the vibration deviation is obtained based on the difference between the measured vibration parameters and the actual vibration parameters. The vibration compensation is determined based on the vibration deviation, and then the vibration compensation is superimposed with the vibration parameters to determine the target vibration parameters. The active suspension is then controlled to adjust the damping force and suspension inflation / deflation rate at the millisecond level with the target vibration parameters as the optimization target, quickly compensating for the deviation and ensuring stable output of the wake-up action.

[0051] Reference Figure 4 As shown, in some embodiments, step S600 above includes, but is not limited to, the following steps: Step S610: Obtain the current vehicle speed based on the operating conditions, and compare the current vehicle speed with the vehicle speed threshold. Step S620: When it is determined that the current vehicle speed is lower than the vehicle speed threshold, control the active suspension to increase the range of motion. Step S630: When it is determined that the current vehicle speed is not lower than the vehicle speed threshold, control the active suspension to increase the frequency.

[0052] When the vehicle speed exceeds the speed threshold, if the active suspension vibrates the cabin significantly, it will cause the vehicle to become unstable and affect safe driving. Therefore, when increasing the vibration parameters, it is necessary to compare the current vehicle speed with the speed threshold. If the current vehicle speed is lower than the speed threshold, the wake-up effect can be improved by increasing the vibration amplitude. If the current vehicle speed is not lower than the speed threshold, it means that the vehicle speed is relatively fast, and the wake-up effect can be improved by increasing the vibration frequency.

[0053] Reference Figure 5 As shown, in some embodiments, step S600 above may include, but is not limited to, the following steps: Step S640: Determine whether the vibration parameter is greater than the parameter threshold; In step S650, when the vibration parameter is greater than the parameter threshold, the value of the vibration parameter is adjusted to be equal to the value of the parameter threshold, and the vehicle is controlled to start the cabin fatigue driving wake-up function.

[0054] During vehicle operation, it is impossible to increase the vibration amplitude or frequency indefinitely. Therefore, it is necessary to set a parameter threshold. When the vibration amplitude or frequency exceeds the parameter threshold, the vibration parameters will be ensured not to exceed the parameter threshold, and the cabin fatigue driving wake-up function will be activated. The cabin vibration and the cabin fatigue driving wake-up function will work together to wake up the driver.

[0055] Reference Figure 6 In some embodiments, step S700 described above includes, but is not limited to, the following steps: Step S710: Control the active suspension holding frequency; Step S720: Control the active suspension to gradually reduce the amplitude.

[0056] Once the driver is confirmed to be awake, the vibration frequency of the active suspension can be maintained, thereby reducing the vibration amplitude of the active suspension. This ensures that the continuously decaying cabin vibration continues to awaken the driver and prevents the driver's fatigue level from increasing in a short period of time.

[0057] Reference Figure 7 As shown, in some embodiments, step S100 above includes, but is not limited to, the following steps: Step S110: Obtain the driver's status information; Step S120: Determine the first fatigue level based on the status information, the first state condition, the second state condition, and the third state condition.

[0058] When obtaining the first and second fatigue levels, existing mature monitoring equipment in the vehicle cabin, such as eye trackers, steering wheel grip force sensors, seat pressure sensors, and heart rate sensors, is reused to collect relevant fatigue parameters such as driver eyelid closure, blinking frequency, grip stability, body posture, and heart rate variability.

[0059] Fatigue levels are categorized according to industry standards: mild fatigue (requires reminder to prevent further deterioration), moderate fatigue (requires active intervention), and severe fatigue (requires strong intervention). A first state condition is set between the normal state and mild fatigue; a second state condition is set between mild and moderate fatigue; and a third state condition is set between moderate and severe fatigue. Each of these three state conditions corresponds to a specific fatigue parameter threshold, thereby outputting a precise first fatigue level. In this embodiment, the second fatigue state can also be obtained using the same steps.

[0060] The technical solution of this invention revolves entirely around the core of "fatigue detection triggering active suspension wake-up," incorporating a wake-up safety threshold mechanism that adapts to vehicle speed and operating conditions. It constructs a complete system of "fatigue triggering - vehicle speed and operating condition safety verification - action output - precise control - effect closed loop," with all modules serving this core function. The overall architecture includes: a fatigue state detection module, a wake-up trigger verification module (integrating the vehicle speed and operating condition threshold mechanism), a suspension wake-up action decision module, a suspension precise execution module, and a wake-up effect feedback module. Through coordinated linkage by the collaborative control center, it ensures the safe and effective implementation of the active suspension wake-up action.

[0061] The fatigue state detection module is as follows: Core function: Accurately collect driver fatigue status and output a unique wake-up trigger signal to provide a basis for the active suspension action. No suspension wake-up action will be triggered if there is no fatigue signal. Reuse existing mature monitoring equipment in the cockpit (eye tracker, steering wheel grip force sensor, seat pressure sensor, heart rate sensor) to collect key parameters such as driver eyelid closure, blink frequency, grip stability, body posture, and heart rate variability. Fatigue levels are classified according to industry standards: mild fatigue (requires reminder to prevent fatigue from worsening), moderate fatigue (requires active wake-up), and severe fatigue (requires strong wake-up). Each level corresponds to a specific fatigue parameter threshold, outputting a precise fatigue status signal and transmitting it to the collaborative control center.

[0062] The wake-up trigger verification module is as follows: Core function: Based on fatigue triggering signals and with vehicle speed and operating condition threshold mechanisms as the core, it ensures that the suspension wake-up action is performed under safe operating conditions, without interfering with the core logic of "fatigue triggering", and only performs operating condition filtering and threshold adaptation to serve the core wake-up function. Core: Through multiple rounds of real-vehicle subjective testing, a "vehicle speed - wake-up risk" corresponding model is established, and wake-up safety thresholds and allowable conditions are set for different vehicle speed ranges and driving scenarios, covering all working conditions such as high speed, low speed, curves, and slopes. Operating condition data acquisition: Synchronously collect real-time operating condition data of the vehicle (vehicle speed, steering angle, slope status, vehicle posture stability) as the core basis for safety verification; Verification rules (vehicle speed and operating condition adaptive core): 1. Basic rules: Only when the fatigue level and vehicle speed conditions are safe will the trigger signal be released, allowing the suspension to perform the wake-up action; if there is no fatigue signal, the process will be directly blocked. 2. High-speed operation: Activation and wake-up are only allowed when the driver reaches moderate or severe fatigue, and a preset upper limit for vibration amplitude is set to prevent instability; 3. Low-speed conditions: The driver can be activated and awakened with slight fatigue. The upper limit of vibration amplitude can be appropriately relaxed to improve the awakening efficiency. 4. Curve or slope conditions: When the vehicle speed is below the safety threshold, the suspension active wake-up action is temporarily disabled, and only the cabin fatigue driving wake-up function is activated. The calibration will be restarted after the operating conditions return to stability. Threshold dynamic adaptation: The parameters of the "vehicle speed - wake-up risk" model can be adjusted according to the vehicle type (passenger car / commercial vehicle) to adapt to the driving characteristics of different vehicle types.

[0063] The suspension wake-up action decision module is as follows: Core function: Design exclusive active suspension action parameters for wake-up needs, and dynamically optimize them by combining fatigue level + vehicle speed threshold mechanism to ensure that the action can effectively wake up the driver, while taking into account safety and comfort. The core action of suspension wake-up is the vertical vibration of the active suspension (directly transmitted to the vehicle body, with the strongest driver feel), supplemented by small changes in suspension travel. This is different from the normal driving action of the suspension and is designed specifically for wake-up. Differentiated design of motion parameters (dual-dimensional adaptation of fatigue level and vehicle speed / operating conditions, all for wake-up service, reflecting adaptive behavior based on vehicle speed / operating conditions): 1. Mild fatigue: Low-frequency micro-amplitude vertical vibration gently stimulates the senses. The amplitude is strictly controlled and the frequency accuracy is improved in high-speed operation, while the amplitude can be appropriately increased in low-speed operation. 2. Moderate fatigue: Medium- and high-frequency pulsed vertical vibration, precise impact sensation, amplitude reduction to maintain stability in high-speed conditions, and amplitude increase to improve wake-up efficiency in low-speed conditions; 3. Severe fatigue: High-frequency short-range pulse vibration + small suspension travel variation provides strong stimulation. In high-speed conditions, high-frequency precise vibration is the main method with strict amplitude control. In low-speed conditions, small suspension lifting can be added to ensure wake-up from deep fatigue / drowsiness. 4. Forced constraints under operating conditions: Before the curve / slope returns to stability, no suspension wake-up action parameters are output, only warning parameters are retained; Output precise action commands: transmit parameters such as vibration frequency, amplitude, duration, and suspension travel adjustment to the suspension precision execution module.

[0064] The suspension precision execution module is as follows: Core function: Precisely execute suspension wake-up commands, counteract road interference, and ensure that actions are landed according to preset parameters. This is the key to the execution of the core wake-up function, while also meeting the constraints of vehicle speed and operating condition thresholds.

[0065] A closed-loop control strategy specific to the wake-up scenario is adopted: using the parameters output by the action decision module as the target value, the actual action state of the suspension is collected in real time through the displacement sensor and acceleration sensor built into the active suspension. Dynamic correction: If the actual action (frequency / amplitude) deviates from the preset value (such as road bumps), the suspension controller adjusts the damping force and suspension inflation / deflation rate in milliseconds to quickly compensate for the deviation and ensure stable output of the wake-up action; frequency correction accuracy is further improved under high-speed conditions, while amplitude stability is emphasized under low-speed conditions. Linkage Enhancement (Optional): Can be linked with EPS electric power steering system to slightly improve steering damping feedback, forming a dual awakening of "suspension feel + steering tactile feel", further enhancing the core awakening effect without increasing hardware costs; Fault backup: If the suspension fails and the wake-up action cannot be performed, immediately switch to the cockpit backup wake-up solution to ensure that the core wake-up needs are not lacking.

[0066] The wake-up effect feedback module (closed-loop optimization, service core wake-up) is as follows: Core function: To verify the wake-up effect, optimize subsequent suspension actions, and dynamically adjust based on vehicle speed and operating conditions to ensure the core wake-up function remains effective and avoids invalid actions.

[0067] Real-time monitoring of driver fatigue status changes, comparing parameters before and after wake-up (such as blinking frequency and whether grip stability has returned to normal). Closed-loop adjustment: Wake-up successful (fatigue level decreases / returns to normal): gradually stop suspension action and return to normal driving mode; Wake-up ineffective (fatigue level remains unchanged / increases): increase suspension action intensity according to preset rules (combined with vehicle speed and operating conditions), prioritizing frequency increase in high-speed conditions and amplitude increase in low-speed conditions, and execute wake-up again; multiple ineffective attempts: superimpose strong cabin warning and prompt to stop and rest; Data accumulation: Record the suspension action effects under different fatigue levels and vehicle speed conditions, continuously optimize the "vehicle speed - wake-up risk" model and action parameters, and improve wake-up accuracy.

[0068] The collaborative control center is as follows: Core function: As the information hub of each module, it quickly transmits signals and coordinates the issuance of instructions to ensure efficient linkage of the entire process of "fatigue detection - vehicle speed and condition verification - action decision - precise execution - feedback optimization", with response latency meeting the requirements of vehicle control and ensuring the timeliness and security of core wake-up functions.

[0069] The core advantages of wake-up are prominent: it accurately triggers the active action of the suspension based on the fatigue level, the physical stimulation is direct and does not interfere with the driver's attention, and the wake-up success rate is greatly improved compared with the traditional indirect wake-up by sound and light and chassis, especially suitable for fatigue-prone scenarios such as highways and monotonous road sections.

[0070] Direct and efficient wake-up: Using fatigue signals as the core trigger source, the suspension actively transmits somatosensory stimulation without occupying visual or auditory senses, solving the problem of traditional wake-up being easily interfered with, and realizing the core wake-up advantages; Maximizing safety: The vehicle speed and operating condition adaptive threshold mechanism filters dangerous operating conditions in advance, and sets wake-up conditions and action parameters differently according to high speed, low speed, curves / slopes, to avoid instability from the source, achieving a balance between safety and wake-up, and solving the core pain points of the industry. Precise landing: The closed-loop control of the suspension precision execution module cancels out road interference, ensuring that the action parameters do not deviate. It also optimizes and corrects the accuracy based on vehicle speed and operating conditions to achieve consistent wake-up effect. Excellent adaptability: Differentiated motion parameters are matched to different fatigue levels and vehicle speed conditions to avoid over- or under-awakening, achieving a balance between comfort and effectiveness; Low-cost deployment: Reuse existing hardware, optimize only the algorithm, and no new equipment is needed to achieve the effect of easy industrialization and promotion.

[0071] Taking a family-oriented new energy sedan equipped with CDC active suspension as an example, the complete implementation process is as follows, focusing entirely on the core wake-up function and highlighting the adaptation to vehicle speed and operating conditions: Initial state: The vehicle is driving normally, the fatigue detection module and suspension system are in standby mode, the suspension is operating in normal comfort mode, and there is no wake-up action; the "vehicle speed-wake-up risk model" has been calibrated through real vehicle testing; Fatigue detection and triggering: When the vehicle is traveling at a high speed of 110km / h, the fatigue detection module detects that the driver's eyelid closure degree exceeds the standard and the grip strength fluctuation increases, which is judged as moderate fatigue, and outputs a wake-up trigger signal; Vehicle speed and operating condition safety verification: The wake-up trigger verification module collects the current vehicle speed (high speed) and vehicle posture stability. Based on the "vehicle speed-wake-up risk" model, it determines that the high-speed operating condition wake-up condition is met, releases the trigger signal, and locks the upper limit of vibration amplitude. Suspension action decision: The suspension wake-up action decision module matches "moderate fatigue + high speed conditions" and outputs corresponding action parameters: medium and high frequency pulse vertical vibration, strictly controlling the amplitude within the safety limit and improving frequency accuracy; Precise execution of actions: The suspension precision execution module receives commands, initiates closed-loop control, and drives the CDC suspension to generate vertical vibration according to preset parameters; when encountering slight road bumps during driving, the sensor detects the vibration deviation, and the controller corrects the damping force in milliseconds (focusing on frequency correction) to maintain stable action parameters; at the same time, it links with EPS to slightly improve steering feedback and enhance the wake-up effect; Operating condition switching and adjustment: During wake-up execution, if the vehicle enters a series of curves, the wake-up trigger verification module immediately pauses the suspension wake-up action and switches to cockpit voice warning; after exiting the curve, if the vehicle speed returns to a stable state and the driver is still in a state of moderate fatigue, the suspension wake-up action is restarted, using the original parameters. Wake-up effect feedback: After 10 seconds of wake-up execution, the fatigue detection module detects that the driver's blinking frequency has returned to normal and grip strength has stabilized, indicating that the wake-up is successful. The suspension gradually reduces the vibration amplitude until it stops and returns to comfort mode. Low-speed operation adaptation: If the vehicle is traveling at a low speed of 30km / h on urban roads and the driver is detected to be slightly fatigued, the verification module will directly release the vehicle, and the action decision module will output a low-frequency micro-amplitude vibration (the amplitude is higher than that of the high-speed operation) to gently wake the driver up without affecting comfort. Fault backup: If the suspension displacement sensor fails, the system immediately switches to the backup solution of seat vibration + voice reminder to ensure wake-up needs are met.

[0072] Key term definitions: Active suspension wake-up action: refers to the vertical vibration / travel adjustment action of the active suspension that deviates from the normal driving control logic and is designed specifically to wake up the driver, which is different from the passive vibration caused by road bumps; Fatigue trigger threshold: refers to the critical value of the parameter that determines when the driver needs to be awakened. Only when this threshold is met will the suspension wake-up trigger signal be output. Vehicle speed-wake-up risk model: A correlation model established through subjective testing of real vehicles, used to set wake-up safety thresholds and suspension action parameter boundaries for different vehicle speed ranges and driving scenarios; Closed-loop control accuracy: The deviation range between the actual suspension action parameters and the preset parameters is ensured to be within the effective range by real-time correction. High-speed conditions focus on frequency accuracy, while low-speed conditions focus on amplitude accuracy.

[0073] Sensor alternative: If the vehicle does not have a dedicated eye tracker, the driver's facial features (such as a blank stare or nodding) can be collected by the onboard camera. Combined with steering wheel grip data, the fatigue state can be determined, and a valid trigger signal can still be output to drive the suspension to actively wake up.

[0074] Alternative suspension action: In addition to vertical vibration, the core action can be a lateral tactile action of "alternating small increases and decreases in the left and right suspensions". It also follows the vehicle speed threshold mechanism (decreases at high speeds and increases at low speeds). Stimulation is transmitted through active suspension action to awaken the driver without changing the core logic.

[0075] Simplified vehicle speed threshold scheme: If there is no need to subdivide the high-speed / low-speed range, the vehicle speed can be divided into two safety threshold ranges, and corresponding wake-up conditions and action parameters can be set. This can still achieve the adaptation between vehicle speed and wake-up action and avoid core safety risks.

[0076] It should be noted that in various specific embodiments of this application, such as obtaining the driver's first and second fatigue levels, when processing data related to user identity or characteristics, such as user information, user behavior data, user historical data, and user location information, user permission or consent will be obtained first. Furthermore, the collection, use, and processing of this data will comply with relevant laws, regulations, and standards of the relevant countries and regions. In addition, when embodiments of this application require obtaining sensitive personal information of users, separate permission or consent from the user will be obtained through pop-ups or redirects to confirmation pages. Only after obtaining the user's separate permission or consent will the necessary user-related data for the normal operation of the embodiments of this application be obtained.

[0077] This invention also provides a driver fatigue wake-up system, including a memory, a processor, and a program stored in the memory and executable on the processor. When the program is executed by the processor, it implements the driver fatigue wake-up method of the above embodiments.

[0078] Taking a driver fatigue wake-up system as an example, where the processor and memory can be connected via a bus. Memory, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs and non-transitory computer-executable programs. Furthermore, memory may include high-speed random access memory, and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some embodiments, memory may optionally include memory remotely located relative to the control processor, and these remote memories can be connected to the control device via a network.

[0079] The non-transitory software program and instructions required to implement the driver fatigue wake-up method of the above embodiments are stored in memory. When executed by a processor, the driver fatigue wake-up method of the above embodiments is executed. For example, executing... Figure 1 Method steps S100 to S700 Figure 2 Method steps S310 to S330, Figure 3Method steps S340 to S360, Figure 4 Method steps S610 to S630, Figure 5 Method steps S640 to S650 Figure 6 Method steps S710 to S720 Figure 7 The method steps S110 to S120, etc.

[0080] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0081] This invention also provides a vehicle including the driver fatigue wake-up system described above.

[0082] The vehicle can be a private car, such as a sedan, SUV, MPV, or pickup truck. It can also be a commercial vehicle, such as a van, bus, small truck, or large trailer. The vehicle must have an electric motor capable of outputting power or acting as a generator to store mechanical energy. When the vehicle is a new energy vehicle, it can be a hybrid or a pure electric vehicle.

[0083] Since the vehicle applies all the technical solutions of the driver fatigue wake-up system described above, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be repeated here.

[0084] It will be understood by those skilled in the art that all or some of the steps and systems in the methods disclosed above can be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components can be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit. Such software can be distributed on a computer-readable medium, which can include computer storage media (or non-transitory media) and communication media (or transient media). As is known to those skilled in the art, the term computer storage media includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disc (DVD) or other optical disc storage, magnetic cartridges, magnetic tape, disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and is accessible to a computer. Furthermore, as is known to those skilled in the art, communication media typically include computer-readable instructions, data structures, program modules, or other data in modulated data signals such as carrier waves or other transmission mechanisms, and may include any information delivery medium.

[0085] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

Claims

1. A method for waking up a driver from driver fatigue, characterized in that, The driver fatigue awakening method, applicable to vehicles equipped with active suspension, includes: Obtain the driver's first fatigue level and the operating condition of the vehicle; The correspondence between the first fatigue level, the working condition, and the vibration parameters is obtained based on the preset data of the vehicle. The vibration parameters are determined based on the correspondence, and the active suspension is controlled to operate according to the vibration parameters. Wait for a preset time, then obtain the driver's second fatigue level; The driver's fatigue level is determined to increase, remain unchanged, or decrease based on the second fatigue level and the first fatigue level. When it is determined that the fatigue level increases or remains unchanged, the active suspension is controlled to increase the vibration parameters and correct the corresponding relationship; Repeat the above steps until the fatigue level decreases, and control the active suspension to gradually reduce the vibration parameters.

2. The driver fatigue awakening method according to claim 1, characterized in that, Controlling the active suspension to operate according to the vibration parameters includes: The real-time operating conditions of the vehicle are obtained, and the vehicle is determined to be on a curve or slope based on the real-time operating conditions. When the vehicle is on the curve or the slope, the control is paused and the active suspension operates according to the vibration parameters. Until the vehicle is no longer in the curve or the slope, the control is re-executed and the active suspension operates according to the vibration parameters.

3. The driver fatigue awakening method according to claim 2, characterized in that, The vehicle has a cabin fatigue driving wake-up function, and the control of the active suspension to operate according to the vibration parameters further includes: When the vehicle is on the curve or the slope, control the vehicle to activate the cabin fatigue driving wake-up function.

4. The driver fatigue awakening method according to claim 1, characterized in that, Controlling the active suspension to operate according to the vibration parameters includes: Obtain the measured vibration parameters of the active suspension, and obtain the vibration deviation based on the measured vibration parameters and the vibration parameters; Vibration compensation is obtained based on the vibration deviation, and target vibration parameters are obtained based on the vibration compensation and the vibration parameters. The active suspension is controlled to operate according to the target vibration parameters.

5. The driver fatigue awakening method according to claim 1, characterized in that, The vibration parameters include frequency and amplitude, and controlling the active suspension to improve the vibration parameters includes: The current vehicle speed is obtained based on the operating conditions, and then compared with a speed threshold. When it is determined that the current vehicle speed is lower than the vehicle speed threshold, the active suspension is controlled to increase the magnitude of the increase. When it is determined that the current vehicle speed is not lower than the vehicle speed threshold, the active suspension is controlled to increase the frequency.

6. The driver fatigue awakening method according to claim 1, characterized in that, The vehicle has a cockpit fatigue driver wake-up function. After controlling the active suspension to increase the vibration parameters, the driver fatigue wake-up method further includes: Determine whether the vibration parameter is greater than the parameter threshold; When the vibration parameter is greater than the parameter threshold, the value of the vibration parameter is adjusted to be equal to the value of the parameter threshold, and the vehicle is controlled to activate the cabin fatigue driving wake-up function.

7. The driver fatigue awakening method according to claim 1, characterized in that, The vibration parameters include frequency and amplitude, and controlling the active suspension to gradually reduce the vibration parameters includes: Control the active suspension to maintain the frequency; The active suspension is controlled to gradually reduce the amplitude.

8. The driver fatigue awakening method according to claim 1, characterized in that, The process of obtaining the driver's first fatigue level includes: Obtain the driver's status information; The first fatigue level is determined based on the state information, the first state condition, the second state condition, and the third state condition.

9. A driver fatigue wake-up system, characterized in that, include: At least one processor; And a memory storing instructions that, when executed by at least one processor, perform the driver fatigue wake-up method according to any one of claims 1 to 8.

10. A vehicle, characterized in that, Includes the driver fatigue wake-up system as described in claim 9.

Images