A new energy vehicle driving loss monitoring system and control method

Abstract

The application belongs to the technical field of new energy, and particularly relates to a new energy vehicle driving loss monitoring system and a control method. The method obtains the switch state of a loss switch of a new energy vehicle. The switch state of the loss switch is a first switch state when the loss switch is operated by a driver, and is a second switch state otherwise. The first switch state is opposite to the second switch state. When the switch state of the loss switch is the second switch state and the second switch state lasts for a first time, the driving state of the driver is a driving loss state. If the driving state of the driver is the driving loss state, an alarm information is transmitted. Since the monitoring process is based on the loss switch signal, the monitoring process is simple, and the monitoring efficiency is high. Moreover, the cost of the loss switch is greatly reduced compared with a camera.

Description

Technical Field

[0001] This invention belongs to the field of new energy technology, specifically relating to a new energy vehicle driver loss monitoring system and control method. Background Technology

[0002] Driving inattention refers to a driver's loss of consciousness or other physical abnormalities that prevent them from operating the vehicle according to safe procedures, resulting in a loss of control. With the development of new energy vehicles and increased environmental awareness, green travel based on new energy vehicles is currently being chosen by the public. However, new energy vehicles cannot completely eliminate driving inattention; situations where drivers become careless, fall asleep, faint, or experience numbness while driving, leading to loss of control, frequently occur. This poses a traffic accident hazard and threatens public safety.

[0003] To avoid safety hazards caused by driver agnosia, existing technologies typically place sensors around vehicles to detect parameters related to the vehicle's interactions with other vehicles in its direction of travel, pedestrians, and lanes. This allows for prediction of potential collisions and lane departures. When such scenarios are predicted, the system automatically brakes to prevent accidents. However, to ensure accuracy, the sensors around the vehicle must have high precision and a wide detection range. Therefore, this sensor-based detection method is costly, requires a large amount of data for processing, and thus complicates the entire system and limits its efficiency. Furthermore, this method of predicting accidents based on sensors around the vehicle to avoid safety hazards caused by driver inattention assumes that traffic accidents will occur if driver inattention occurs. Therefore, it avoids traffic accidents by directly detecting whether a traffic accident has occurred. Thus, the corresponding control measures based on sensor detection data are a process of avoiding traffic accidents by predicting the outcome of the traffic accident. This process does not know why the traffic accident will occur. That is, this method does not avoid traffic accidents by avoiding the cause of the traffic accident. Traffic accidents have corresponding causes, so this control method has a lag.

[0004] Therefore, to prevent traffic accidents caused by driver inattention, existing technologies also use in-vehicle cameras to monitor the driver's state in real time. When the camera detects driver fatigue or other instances where the driver is not operating the vehicle according to safe procedures, it issues an alert to prevent accidents. This method achieves control by detecting the causes of traffic accidents. Compared to methods that prevent accidents based on detection results, cause-based detection provides proactive intervention and better ensures safe vehicle operation. However, control based on camera devices requires specific hardware configurations to ensure detection accuracy, and the data processing device needs to recognize the image content after acquisition. Therefore, this method requires high costs to achieve safe vehicle operation, and its accuracy heavily depends on the accuracy of recognition. Thus, this method still suffers from high costs, limited detection accuracy, and potentially inaccurate control results. Summary of the Invention

[0005] The purpose of this invention is to provide a new energy vehicle driving agnosia monitoring system and control method to solve the problems of high cost, limited monitoring accuracy, and inaccurate control results in existing control processes designed to ensure safe vehicle operation.

[0006] To address the aforementioned technical problems, this invention provides a control method for driver impairment in new energy vehicles. The new energy vehicle includes a disability switch connected to a control device. The control method includes the following steps:

[0007] 1) Obtain the switching state of the disability switch of the new energy vehicle; the disability switch is in the first switching state when it is operated by the driver, and in the second switching state otherwise, the first switching state is the opposite of the second switching state.

[0008] 2) Determine the driver's driving status based on the switching state of the disability switch; when the switching state of the disability switch is the second switching state, and the second switching state is continuously set for a first time, the driver's driving status is a driving impairment state.

[0009] 3) If the driver is in a state of driving incompetence, an alarm message will be transmitted.

[0010] The beneficial effects are as follows: This invention achieves driver status judgment by monitoring the on / off state of the disability switch installed on new energy vehicles. The disability switch is a switch that automatically activates when the operator loses the ability to act. That is, the on / off state of the switch is different when the driver is in a state of unconsciousness and when he is not unconscious (in this invention, if the first switch state is in the on state, then the second switch state is in the off state; if the first switch state is in the off state, then the second switch state is in the on state). Therefore, the driver's driving status can be accurately obtained by simply obtaining the on / off state of the disability switch. In order to further ensure the accuracy of the driver's driving status, this invention does not immediately issue an alarm when the disability switch state is detected to be in the second on state, that is, when the driver does not operate the disability switch. Instead, the alarm is triggered only after a certain period of time. This control strategy avoids false alarms caused by the driver unintentionally leaving the vehicle. Therefore, this invention monitors the driver's driving status through a disability switch, resulting in highly reliable monitoring results. The monitoring process is based on the signal from the disability switch, making it simple and efficient. Furthermore, the cost of the disability switch is significantly lower than that of a camera.

[0011] Furthermore, in step 2), when the switch state of the disability switch is the second switch state and the current vehicle speed is not lower than the set speed, then in step 3), the vehicle is controlled to have no power output; when the switch state of the disability switch is the second switch state and the current vehicle speed is greater than the set speed, then in step 3), active braking is performed after transmitting the alarm information.

[0012] Existing control strategies issue warnings and immediately brake upon detecting a driver's incapacity. This invention, however, only initiates emergency braking at high speeds (high-risk situations). In other low-risk situations, warnings prompt the driver to take appropriate control. Furthermore, it controls the vehicle to decelerate smoothly by controlling the de-energization of the vehicle. This means that when the vehicle speed is below a set speed, the risk of an accident is low, thus achieving smooth deceleration by de-energizing the entire vehicle avoids unnecessary emergency braking in these low-risk situations, ensuring passenger comfort. At higher speeds, the probability of an accident due to driver incapacity is higher; therefore, safety is ensured through both warnings and emergency braking. This invention ensures reliable vehicle control while preventing dangerous situations.

[0013] Furthermore, if in step 2), the current vehicle speed is less than the set speed, then in step 3), the alarm information is a display alarm information; if in step 2), the current vehicle speed is not less than the set speed, then the alarm information is both a display alarm information and an audible alarm information.

[0014] Different alarm methods are used in different situations. When the current vehicle speed is lower than the set speed, the alarm is only displayed. When the vehicle speed is not lower than the set speed, the alarm is issued by both display and sound to ensure more efficient reminders to the driver to perform the prescribed operations.

[0015] Furthermore, the switching state of the disability switch is realized through two monitoring lines installed on the disability switch.

[0016] By monitoring the status through two channels, the determination of the switch status becomes more accurate, leading to a more accurate identification of the driver's status. Specifically, if one channel displays the disabled switch as being in the second switch state, then it is considered to be in the second switch state, thus ensuring vehicle safety.

[0017] To address the aforementioned technical problems, this invention also provides a new energy vehicle driver incapacity monitoring system, comprising a control device, a disability switch connected to the control device, and an alarm device connected to the control device. The disability switch is in a first switching state when operated by the driver, and otherwise in a second switching state, the first switching state being the opposite of the second switching state. The control device includes a memory and a processor, the processor executing instructions to implement the following method steps:

[0018] 1) Obtain the on / off status of the disability switch of the new energy vehicle;

[0019] 2) Determine the driver's driving status based on the switching state of the disability switch; when the switching state of the disability switch is the second switching state, and the second switching state is continuously set for a first time, the driver's driving status is a driving impairment state.

[0020] 3) If the driver is in a state of driving incapacitation, an alarm message is transmitted to the alarm device;

[0021] The alarm device is used to issue alarms.

[0022] The beneficial effects are as follows: This invention achieves driver status judgment by monitoring the on / off state of the disability switch installed on new energy vehicles. The disability switch is a switch that automatically activates when the operator loses the ability to act. That is, the on / off state of the switch is different when the driver is in a state of unconsciousness and when he is not unconscious (in this invention, if the first switch state is in the on state, then the second switch state is in the off state; if the first switch state is in the off state, then the second switch state is in the on state). Therefore, the driver's driving status can be accurately obtained by simply obtaining the on / off state of the disability switch. In order to further ensure the accuracy of the driver's driving status, this invention does not immediately issue an alarm when the disability switch state is detected to be in the second on state, that is, when the driver does not operate the disability switch. Instead, the alarm is triggered only after a certain period of time. This control strategy avoids false alarms caused by the driver unintentionally leaving the vehicle. Therefore, this invention monitors the driver's driving status through a disability switch, resulting in highly reliable monitoring results. The monitoring process is based on the signal from the disability switch, making it simple and efficient. Furthermore, the cost of the disability switch is significantly lower than that of a camera.

[0023] Furthermore, in step 2), when the switch state of the disability switch is the second switch state and the current vehicle speed is not lower than the set speed, then in step 3), the vehicle is controlled to have no power output; when the switch state of the disability switch is the second switch state and the current vehicle speed is greater than the set speed, then in step 3), active braking is performed after transmitting the alarm information.

[0024] Existing control strategies issue warnings and immediately brake upon detecting a driver's incapacity. This invention, however, only initiates emergency braking at high speeds (high-risk situations). In other low-risk situations, warnings prompt the driver to take appropriate control. Furthermore, it controls the vehicle to decelerate smoothly by controlling the de-energization of the entire vehicle. This means that when the vehicle speed is below a set speed, the risk of an accident is low, thus achieving smooth deceleration by de-energizing the entire vehicle avoids unnecessary emergency braking in these low-risk situations, ensuring passenger comfort. At higher speeds, the probability of an accident due to driver incapacity is higher; therefore, safety is ensured through both warnings and emergency braking. This invention guarantees reliable vehicle control while preventing dangerous situations.

[0025] Furthermore, if in step 2), the current vehicle speed is less than the set speed, then in step 3), the alarm information is a display alarm information; if in step 2), the current vehicle speed is not less than the set speed, then the alarm information is both a display alarm information and an audible alarm information.

[0026] Different alarm methods are used in different situations. When the current vehicle speed is lower than the set speed, the alarm is only displayed. When the vehicle speed is not lower than the set speed, the alarm is issued by both display and sound to ensure more efficient reminders to the driver to perform the prescribed operations.

[0027] Furthermore, the switching state of the disability switch is realized through two monitoring lines installed on the disability switch.

[0028] By monitoring the status through two channels, the determination of the switch status becomes more accurate, leading to a more accurate identification of the driver's status. Specifically, if one channel displays the disabled switch as being in the second switch state, then it is considered to be in the second switch state, thus ensuring vehicle safety.

[0029] Furthermore, the disability switch is located on the left side of the brake pedal of the new energy vehicle.

[0030] The incapacitance switch needs to be continuously operated during driving. This system is used in new energy vehicles, which only have a brake pedal and an accelerator pedal and no clutch pedal. Since the incapacitance switch needs to be operated continuously during vehicle operation, in order not to affect the driver's normal operation, the switch position is set to the left of the brake pedal. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the new energy vehicle driver agnosia monitoring system of the present invention;

[0032] Figure 2 This is a flowchart of the control method for driver loss of awareness in new energy vehicles according to the present invention. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0034] Example of a new energy vehicle driver agnosia monitoring system:

[0035] The new energy vehicle in this embodiment includes a control device, a disability switch connected to the control device, and an alarm device connected to the control device. The disability switch is a switch that automatically activates when the operator loses their ability to act; that is, the on / off state of the switch differs depending on whether the driver is incapacitated or not. Therefore, in this embodiment, the driver's condition is accurately determined by monitoring the on / off state of the disability switch installed on the new energy vehicle. Because the monitoring process is based on the disability switch signal, the monitoring process is simple and efficient, and the cost of the disability switch is significantly lower than that of a camera.

[0036] like Figure 1This is a structural block diagram of the system in this embodiment, including a driver incapacity detection device, a vehicle safety braking control system, and an instrument panel. The driver incapacity detection device monitors the on / off state of the incapacity switch. The incapacity switch needs to be continuously operated during driving. Therefore, in this embodiment, the incapacity switch is located on the left side of the brake pedal. Since the system in this embodiment is used in new energy vehicles, which only have a brake pedal and an accelerator pedal and no clutch pedal, and since the incapacity switch needs to be continuously operated during vehicle operation, in order not to affect the driver's normal operation, the incapacity switch is located on the left side of the brake pedal in this embodiment, so that the incapacity switch can be continuously operated by keeping the driver's foot on the incapacity switch while driving. Furthermore, this embodiment employs dual detection signals to detect the switching state of a single disabled switch. One detection signal is open when the disabled switch is operated and closed when it is not operated, while the other detection signal is closed when the disabled switch is operated and open when it is not operated. Therefore, either of the two detection signals can independently detect the switching state of the disabled switch. The process of using two detection signals to detect the switching state of the disabled switch improves the reliability of the detection results and avoids the situation where only one detection signal is used, which might mistakenly detect the switching state of the disabled switch as being in operation, thus incorrectly judging the driver's state as a safe driving state and causing driving safety issues. This embodiment avoids this problem by using two detection signals. Moreover, for the sake of vehicle driving safety, when the disabled switch state detected by one detection signal is an inactive switching state, it is considered an inactive switching state. The vehicle safety braking control system includes a central control unit (VCU). The VCU monitors two detection signals via I / O ports to determine the on / off state of the disability switch. Based on this, it determines whether the driver is in a normal vehicle-driving state and then implements corresponding control measures based on the vehicle control strategy. In this embodiment, the instrument panel serves as a warning device, used to alert the driver when necessary. The instrument panel in this embodiment not only displays warnings (i.e., visual warnings) but also provides audible warnings. Furthermore, to more effectively alert the driver, the instrument panel is positioned in the direction the driver is facing while driving, or an existing display device with audio-visual transmission capabilities is used as the instrument panel in this embodiment.

[0037] In this embodiment, the vehicle control strategy of the driver agnosia monitoring system is as follows: Figure 2 As shown, the system based on this embodiment can monitor the driver's physical condition and transmit the data to the central control unit (VCU). If the VCU detects that the driver is operating the disability device abnormally or has not operated the disability device, it will issue a voice reminder to the driver or take braking measures to achieve the goal of safe operation. Figure 2The specific control methods and steps include:

[0038] 1) Obtain the status of the disabled switch. If the disabled switch status is invalid, determine whether the vehicle is stationary.

[0039] This embodiment takes into account that after the vehicle starts, the disability switch may be in an invalid state in two situations (i.e., the switch is in the state of no operation). One situation is when the vehicle is stationary, in which case no operation of the disability switch is required. The other situation is when the vehicle is driving and the disability switch needs to be operated, but no operation is performed, resulting in the disability switch being in an invalid state. Therefore, this embodiment first determines whether the invalid state of the disability switch is in a permitted parking (or stationary) state or in a prohibited driving state, and then executes different control strategies accordingly.

[0040] 2) When the vehicle is stationary, determine whether the vehicle is in a drivable state. If it is not in a drivable state, prohibit the vehicle from outputting power. If the vehicle is in a drivable state, determine whether it is in a driving incapacitated state. If it is in a driving incapacitated state, the instrument panel will remind you that "the incapacitation switch has not been operated". In this case, to request power output, you need to restart the vehicle to the drivable mode. If it is not in a driving incapacitated state, keep the enable switch operated and press the accelerator to drive normally.

[0041] When the vehicle is in motion, it determines whether it is in a state of driver incapacity. If it is not in a state of driver incapacity, it can drive normally by pressing the accelerator while keeping the enable switch in operation. If it is in a state of driver incapacity, the instrument panel will remind you that "the incapacity switch has not been operated" and will automatically decelerate, cut off power output, and activate the electronic parking brake. In this case, to request power output, you need to restart the vehicle to a drivable mode.

[0042] In this embodiment, when the power failure switch is invalid, it is first determined whether the invalidity occurs during parking or during driving. When the invalidity occurs during parking, since there is a process of transitioning from parking to driving, this embodiment monitors the state of the power failure switch during the transition from parking to driving. Therefore, the necessary condition for the vehicle to transition from parking to driving is that the power failure switch is operated. If the power failure switch is not operated, the vehicle cannot transition from parking to driving.

[0043] In this embodiment, the ineffective state of the disability switch during driving, i.e., when the disability switch is not operated, is not directly judged as a state of driver incapacity. Only when the ineffective state of the disability switch lasts for a set first time is it determined to be a state of driver incapacity. If the driver operates the switch again before the ineffective period is less than the set first time, this situation is considered a non-driving incapacity state. This avoids the situation where the driver's brief absence from the control of the disability switch leads to a misjudgment of a driving incapacity state. Furthermore, in this embodiment, when a driving incapacity state occurs during driving, different processing is applied based on the current vehicle speed. If the current vehicle speed is lower than a set speed, a warning is issued via the instrument panel. If the brake pedal is operated in this situation, the vehicle will also have no power output. This means that when the vehicle speed is lower than the set speed, the risk of a traffic accident is relatively low. Therefore, by reducing the power output of the vehicle, a smooth deceleration process is achieved, avoiding unnecessary emergency braking in this low-risk situation and ensuring passenger comfort. When a driver is in a state of driver incapacitation while driving, if the vehicle speed exceeds the set speed, a warning will be issued via the instrument panel, and emergency braking will be initiated after the warning has exceeded a second set time. This control strategy takes into account that the probability of traffic accidents occurring in a state of driver incapacitation is higher at higher speeds. Therefore, vehicle safety is ensured not only through warnings but also through emergency braking. Furthermore, in this embodiment, considering that driver judgment and operation are more conducive to vehicle safety, braking will not be initiated immediately after a warning is issued at higher speeds. If the driver continues to operate the incapacitation switch after the warning, the warning ends, and no further emergency braking is required.

[0044] In this embodiment, the instrument panel issues warnings in different ways depending on the circumstances. When the current vehicle speed is less than the set speed, the warning is issued only through the display. However, when the vehicle speed is not less than the set speed, the warning is issued not only through the display but also through sound, in order to more effectively remind the driver to perform the prescribed operations on the vehicle.

[0045] The control strategy in this embodiment works as follows: When the vehicle is traveling at low speeds (for passenger groups, city buses, airport shuttles, etc., a reasonable threshold needs to be set according to operating conditions), if the disability switch is not operated or is ineffective, pressing the accelerator will result in no power output to the vehicle. The ineffectiveness time of the disability switch is not judged, and the electronic parking brake is not actively activated to take braking measures. At the same time, the instrument panel reminds the driver that the disability switch has not been operated. When the vehicle is traveling at high speeds, if the disability switch is not operated or is ineffective, the instrument panel will provide an audible and visual reminder to the driver. If the duration exceeds a set time, the vehicle's power output will be cut off, and the electronic parking brake will be activated for emergency braking. If the driver operates the disability switch again, the electronic parking brake will not be released; requesting power output requires restarting the vehicle to a drivable mode. By activating the driver's aphasia monitoring system, the driver's physical condition is continuously monitored. If the driver experiences fainting, distraction, or other behaviors that result in loss of control of the vehicle, a warning reminder or braking control will be issued to prevent traffic accidents caused by driver abnormalities and ensure public safety.

[0046] Example of a control method for driver agnosia in new energy vehicles:

[0047] The new energy vehicle in this embodiment includes a disability switch connected to the new energy vehicle control system to monitor whether the driver is in a state of driving impairment. Specifically, the method in this embodiment obtains the switching state of the disability switch of the new energy vehicle. When the disability switch is operated by the driver, the switching state of the disability switch is a first switching state; otherwise, it is a second switching state, the first switching state being the opposite of the second switching state. When the switching state of the disability switch is the second switching state, and this second switching state is continuously set for a first time, then the driver's driving state is a state of driving impairment. If the driver's driving state is a state of driving impairment, an alarm message is transmitted. The specific steps of the control method in this embodiment have been described in detail in the new energy vehicle driving impairment monitoring system and will not be repeated here.

[0048] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present invention shall also be included within the scope of protection of the present invention.

Claims

1. A method for controlling a new energy vehicle in a driving unknown state, characterized in that, The new energy vehicle includes a disability switch connected to a control device, and the control method includes the following steps: 1) Obtain the switching state of the disability switch of the new energy vehicle; the switching state of the disability switch is the first switching state when it is operated by the driver, and the second switching state otherwise. The first switching state is the opposite of the second switching state. 2) Determine the driver's driving status based on the switching state of the disability switch; when the switching state of the disability switch is the second switching state, determine whether the new energy vehicle is stationary and whether the new energy vehicle is drivable. 3) If the new energy vehicle is not stationary and the second switch state is continuously set for the first time, then it is determined that the driver is in a state of driving insensitivity. If the new energy vehicle is stationary and drivable, and the second switch state is continuously set for a first time, then the driver is determined to be in a state of driving insensitivity. 4) If the driver is in a state of driving incompetence, an alarm message is transmitted, and the power output of the new energy vehicle is requested to be restarted to a driving mode.

2. The control method of claim 1, wherein, In step 2), if the power failure switch is in the second switch state and the current vehicle speed is less than the set speed, then in step 3), the vehicle is controlled to have no power output; if the power failure switch is in the second switch state and the current vehicle speed is not less than the set speed, then in step 4), active braking is performed after transmitting the alarm information.

3. The control method of claim 2, wherein, If the current vehicle speed is less than the set speed in step 2), then the alarm information in step 4) is a display alarm information; if the current vehicle speed is not less than the set speed in step 2), then the alarm information is a display alarm information and an audible alarm information.

4. The control method of claim 1, wherein, The switching status of the disabled switch is controlled by two monitoring lines installed on the disabled switch.

5. A new energy vehicle driving out-of-awareness monitoring system, characterized in that, The system includes a control device, a disability switch connected to the control device, and an alarm device connected to the control device. The disability switch is in a first switching state when operated by the driver, and otherwise in a second switching state, the first switching state being the opposite of the second switching state. The control device includes a memory and a processor, the processor executing instructions to implement the following method steps: 1) Obtain the on / off status of the disability switch of the new energy vehicle; 2) Determine the driver's driving status based on the switching state of the disability switch; when the switching state of the disability switch is the second switching state, determine whether the new energy vehicle is stationary and whether the new energy vehicle is drivable. 3) If the new energy vehicle is not stationary and the second switch state is continuously set for the first time, then it is determined that the driver is in a state of driving insensitivity. If the new energy vehicle is stationary and drivable, and the second switch state is continuously set for a first time, then the driver is determined to be in a state of driving insensitivity. 4) If the driver is in a state of driving incompetence, an alarm message is transmitted to the alarm device, and the power output of the new energy vehicle is requested to be restarted to a drivable mode.

6. The new energy vehicle driving out-of-awareness monitoring system according to claim 5, characterized in that, In step 2), if the power failure switch is in the second switch state and the current vehicle speed is less than the set speed, then in step 3), the vehicle is controlled to have no power output; if the power failure switch is in the second switch state and the current vehicle speed is not less than the set speed, then in step 4), active braking is performed after transmitting the alarm information.

7. The new energy vehicle drive awareness monitoring system according to claim 6, characterized in that, If the current vehicle speed is less than the set speed in step 2), then the alarm information in step 4) is a display alarm information; if the current vehicle speed is not less than the set speed in step 2), then the alarm information is a display alarm information and an audible alarm information.

8. The new energy vehicle driving off-road monitoring system according to claim 5, characterized in that, The switching status of the disabled switch is controlled by two monitoring lines installed on the disabled switch.

9. The new energy vehicle driving off-road monitoring system according to claim 5, characterized in that, The disability switch is located on the left side of the brake pedal in the new energy vehicle.

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