A system and method for reducing sudden surges in driving stress

Abstract

The present invention relates to the field of automotive safety, and particularly to a system and method for reducing sudden surges in driving stress. The present invention can identify the state of excessive sudden driving stress of a driver, record and upload events of excessive stress, analyze the reasons for the sudden increase in driving stress, compile records, and provide corresponding improvement measures for each situation, enabling the user to truly understand their own driving behavior, enhancing driving safety and comfort, and reducing related traffic accidents caused by sudden surges in driving stress of the driver.

Description

Technical Field

[0001] The present invention relates to the field of vehicle safety, and particularly to a system and method for reducing sudden surges in driving stress. Background Art

[0002] Most existing vehicle safety technologies detect the driver's state during driving, such as distraction, fatigue, anger, etc., and rarely pay attention to the driver's psychological stress. However, the driver's psychological stress is crucial for driving safety. According to statistics, approximately 75% of traffic accidents are caused by excessive driving stress. Excessive driving stress may lead to aggressive and dangerous behaviors of the driver on the road, reduce driving performance, and affect traffic safety.

[0003] During normal driving, a driver may encounter various sudden events that cause sudden surges in driving stress, such as a sudden increase in stress caused by the sudden braking of the vehicle in front, a sudden increase in stress caused by aggressive driving, a sudden increase in stress caused by ignoring potential dangers, a sudden increase in stress caused by running a yellow light, a sudden increase in stress caused by meeting another vehicle on a narrow road, a sudden increase in stress caused by not giving way to pedestrians, etc. Sudden surges in driving stress can easily lead to the driver's stress response and result in some improper operations, thus triggering traffic accidents.

[0004] Since sudden surges in driving stress are difficult to detect in advance, and the possible consequences cannot be predicted in advance, traffic accidents caused by sudden surges in driving stress occur frequently. Summary of the Invention

[0005] Aiming at the problems existing in the prior art, the purpose of the present invention is to provide a system and method for reducing sudden surges in driving stress. By recording and analyzing sudden surges in driving stress during driving and sending the process, cause, and improvement measures of the event to the user, the user can learn about the potential risks in their own driving process from a third-party perspective, thereby effectively preventing or reducing the occurrence of road traffic accidents.

[0006] To achieve the above purpose, the present invention adopts the following technical solutions.

[0007] Technical Solution 1:

[0008] A system for reducing sudden surges in driving stress of a driver includes an information collection component, a stress assessment component, an event upload component, an event analysis component, and a push component;

[0009] The information collection component includes a vehicle driver physiological collector, a driver camera, a vehicle camera, and a vehicle motion parameter collector;

[0010] The vehicle driver physiological collector includes a pulse sensor and a galvanic skin sensor, which are used to collect the driver's pulse information and galvanic skin physiological information; the driver camera is used to collect the driver's operation information, and the driver's operation information includes the driver's head movement and hand movement information; the vehicle camera is used to collect the vehicle traffic environment information; the vehicle motion parameter collector is used to collect vehicle motion parameters, and the vehicle motion parameters include vehicle speed, steering wheel angle, accelerator pedal opening, longitudinal acceleration, and lateral acceleration;

[0011] The pressure assessment component is used to receive the driver's pulse information and galvanic skin physiological information collected by the vehicle driver physiological collector, and determine whether the driver is in a sudden driving pressure state according to the driver's pulse information and galvanic skin physiological information; the pressure assessment component has pre-stored the heart rate variability threshold and galvanic skin growth rate threshold of the driver under normal driving pressure;

[0012] The event upload component is used to upload the driver's operation information, vehicle traffic environment information, and vehicle motion parameters before and after sudden driving pressure;

[0013] The event analysis component includes a driving pressure surge event type library, which is used to determine the event type of the sudden pressure surge event that occurs to the driver under sudden driving pressure according to the uploaded driver's operation information, vehicle traffic environment information, and vehicle motion parameters;

[0014] The push component includes a communicator and a driving pressure surge event analysis library. The push component is used to compare the driving pressure surge event type with the driving pressure surge event analysis library, retrieve the driving pressure surge event process, cause, and corresponding improvement measures, and organize and generate a help document; the push component is also used to wirelessly connect to the driver's mobile phone using the communicator and send the help document to the driver through the communicator.

[0015] Technical solution two:

[0016] A method for reducing sudden driving pressure surge events of drivers, based on the system for reducing sudden driving pressure surge events of drivers in Technical solution one, includes the following steps:

[0017] Step 1, during the driver's driving process, the driver camera collects the driver's operation information, the vehicle camera collects the vehicle traffic environment information, the vehicle motion parameter collector collects vehicle motion parameters, the pulse sensor collects the driver's pulse information, and the galvanic skin sensor collects the driver's galvanic skin physiological information;

[0018] Step 2, the pressure assessment component calculates the standard deviation SDNN of the driver's heart rate variability and the galvanic skin growth rate DR according to the pulse information and galvanic skin physiological information;

[0019] Step 3: When the standard deviation SDNN of the driver's heart rate variability is greater than the set electrocardiogram threshold and the dermal electricity growth rate DR is greater than the set dermal electricity threshold, it is determined that the driver is in a sudden driving stress state, that is, a sudden stress surge event has occurred;

[0020] Step 4: The event upload component sends the driver's operation information, vehicle traffic environment information, and vehicle motion parameter information within a set time before and after the driver experiences sudden driving stress to the event analysis component;

[0021] Step 5: The event analysis component compares the driver's operation information, vehicle traffic environment information, and vehicle motion parameter information with the driving stress surge event type library to obtain the driving stress surge event type, and sends the event type to the push component;

[0022] Step 6: The push component compares the driving stress surge event type with the driving stress surge event analysis library, retrieves the driving stress surge event process, cause, and corresponding improvement measures, and organizes them into a help document; finally, the push component sends the help document to the driver.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows: By recording and analyzing sudden driving stress surge events during driving and sending the process, cause, and improvement measures of the event to the user, enabling the user to learn about potential risks in their own driving process from a third-party perspective, effectively preventing or reducing the occurrence of road traffic accidents, which has extremely important implications for improving road traffic safety. It can identify the state of excessive driving stress, record and upload excessive stress events, analyze the causes of excessive driving stress, compile records, and provide corresponding improvement measures for each situation, enabling the user to truly understand their own driving behavior, improving driving safety and comfort, and reducing related traffic accidents caused by sudden driving stress surges of drivers. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The following further describes the present invention in detail with reference to the drawings and specific embodiments.

[0025] Figure 1 It is a schematic structural diagram of the system for reducing sudden driving stress surge events of the present invention;

[0026] Figure 2 It is a flowchart of the method for reducing sudden driving stress surge events of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] The following will describe the implementation scheme of the present invention in detail with reference to the embodiments. However, those skilled in the art will understand that the following embodiments are only used to illustrate the present invention and should not be regarded as limiting the scope of the present invention.

[0028] Reference Figure 1 , a system for reducing sudden surges in driver driving pressure, comprising an information collection component, a pressure assessment component, an event upload component, an event analysis component and a push component;

[0029] Reference Figure 1 , the information collection component includes a vehicle driver physiological collector, a driver camera, a vehicle camera and a vehicle motion parameter collector;

[0030] The vehicle driver physiological collector includes a pulse sensor and a galvanic skin sensor, and is used to collect the driver's pulse information and galvanic skin physiological information; the driver camera is used to collect driver operation information, and the driver operation information includes the driver's head movements and hand movement information; the vehicle camera is used to collect vehicle traffic environment information; the vehicle motion parameter collector is used to collect vehicle motion parameters through the CAN bus, and the vehicle motion parameters include vehicle speed, steering wheel angle, accelerator pedal opening, longitudinal acceleration and lateral acceleration;

[0031] The pressure assessment component is used to receive the driver's pulse information and galvanic skin physiological information collected by the vehicle driver physiological collector, and determine whether the driver is currently experiencing sudden driving pressure based on the driver's pulse information and galvanic skin physiological information; the pressure assessment component has pre-stored the heart rate variability threshold and galvanic skin growth rate threshold under normal driving pressure of the driver;

[0032] The event upload component is used to upload the driver operation information, vehicle traffic environment information and vehicle motion parameters before and after sudden driving pressure;

[0033] The event analysis component includes a driving pressure surge event type library, and is used to determine the event type of the sudden pressure surge event that occurs to the driver under sudden driving pressure according to the uploaded driver operation information, vehicle traffic environment information and vehicle motion parameters;

[0034] The push component includes a communicator and a driving pressure surge event analysis library. The push component is used to compare the driving pressure surge event type with the driving pressure surge event analysis library, retrieve the driving pressure surge event process, cause and corresponding improvement measures and organize them into a help document. The push component is also used to wirelessly connect to the driver's mobile phone using the communicator and send the help document to the driver through the communicator.

[0035] Further, both the pulse sensor and the galvanic skin sensor are provided on the vehicle steering wheel, and obtain the driver's pulse information and galvanic skin physiological information through contact with the driver's hand; the model of the pulse sensor is pulsesensor.

[0036] Furthermore, the driver camera is set directly in front of the driver's line of sight during normal driving; the model of the driver camera is Dao Kesi DKS-QJ-500-YTYSW03.

[0037] The model of the vehicle camera is the Dao Kesi DKS-QJ-500-YTYSW03 panoramic imaging camera.

[0038] Reference Figure 2 , a method for reducing sudden surges in driver driving pressure, a system for reducing sudden surges in driver driving pressure, comprising the following steps:

[0039] Step 1, during the driver's driving process, the driver camera collects the driver's operation information, the vehicle camera collects the vehicle traffic environment information, the vehicle motion parameter collector collects the vehicle motion parameters, the pulse sensor collects the driver's pulse information, and the galvanic skin sensor collects the driver's galvanic skin physiological information;

[0040] Step 2, the pressure assessment component calculates the standard deviation SDNN of the driver's heart rate variability and the galvanic skin growth rate DR based on the pulse information and the galvanic skin physiological information;

[0041] Specifically, the heart rate variability is the interval between two consecutive heartbeats (N-N) of the driver, and the standard deviation SDNN of the heart rate variability is shown as follows:

[0042]

[0043] In the formula, N represents the number of normal heartbeats, represents the number of heartbeats at the i-th N-N interval, represents the average number of heartbeats over N intervals; specifically, N-N is selected as 5 seconds;

[0044] The galvanic skin growth rate DR is the percentage of the galvanic skin increment of the driver to the galvanic skin under normal driving conditions, as shown in the following formula:

[0045]

[0046] In the formula, EDA i represents the galvanic skin value at time i; represents the galvanic skin value under normal driving.

[0047] Step 3, when the standard deviation SDNN of the driver's heart rate variability is greater than the set electrocardiogram threshold and the galvanic skin growth rate DR is greater than the set galvanic skin threshold, it is determined that the driver is in a state of sudden driving pressure, that is, a sudden pressure surge event has occurred;

[0048] Step 4, the event upload component sends the driver operation information, vehicle traffic environment information, and vehicle motion parameter information within a set time before and after the driver experiences sudden driving pressure to the event analysis component;

[0049] Step 5, the event analysis component compares the driver operation information, vehicle traffic environment information, and vehicle motion parameter information with the driving pressure surge event type library to obtain the driving pressure surge event type, and sends the event type to the push component;

[0050] Exemplarily, when the driving pressure exceeds the set threshold and the vehicle speed is greater than the speed limit, it is determined as a driving pressure surge event caused by speeding; when the driving pressure exceeds the set threshold and both the lateral acceleration and longitudinal acceleration of the vehicle increase sharply, and considering the surrounding environment information, when there is a lane change operation, it is determined as a driving pressure surge event caused by inappropriate lane change; when the driving pressure exceeds the set threshold and the vehicle deceleration decreases sharply, and considering the in-vehicle camera, when there is driver distraction (the driver bows his head, eats, drinks, operates the mobile phone, operates the navigation), it is determined as a driving pressure surge event caused by driver distraction; when the driving pressure exceeds the set threshold and the vehicle speed is greater than 30 km / h, and the out-of-vehicle camera shows that there are pedestrians crossing the road in the surrounding environment information, it is determined as a driving pressure surge event caused by failure to yield to pedestrians; when the driving pressure exceeds the set threshold and the vehicle speed is less than 10 km / h, and the out-of-vehicle camera shows that there is a narrow road meeting in the surrounding environment, it is determined as a driving pressure surge event caused by meeting; when the driving pressure exceeds the set threshold and the steering wheel acceleration increases sharply, and the out-of-vehicle camera shows that there are potential traffic risks in the surrounding environment, it is determined as a driving pressure surge event caused by emergency avoidance;

[0051] Step 6, the push component compares the driving pressure surge event type with the driving pressure surge event analysis library, retrieves the driving pressure surge event process, cause, and corresponding improvement measures, and organizes and generates a help document; finally, the push component sends the help document to the driver.

[0052] Further, the set electrocardiogram threshold is 1.1 times the standard deviation SDNN threshold of heart rate variability under normal driving, and the set galvanic skin threshold is 1.1 times the galvanic skin growth rate DR threshold under normal driving.

[0053] Further, the set time is 10 seconds.

[0054] Although the present invention has been described in detail with general descriptions and specific embodiments in this specification, based on the present invention, some modifications or improvements can be made, which are obvious to those skilled in the art. Therefore, these modifications or improvements made without departing from the spirit of the present invention all fall within the scope of protection required by the present invention.

Claims

1. A system for reducing sudden surges in a driver's driving stress, characterized in that, It includes an information collection component, a pressure assessment component, an event upload component, an event analysis component, and a push component; The information collection component includes a vehicle driver physiological collector, a driver camera, a vehicle camera, and a vehicle motion parameter collector; The vehicle driver physiological collector includes a pulse sensor and a galvanic skin sensor, which are used to collect the driver's pulse information and galvanic skin physiological information; The driver camera is used to collect the driver's operation information, and the driver's operation information includes the driver's head movement and hand movement information; the vehicle camera is used to collect the vehicle traffic environment information; the vehicle motion parameter collector is used to collect the vehicle motion parameters, and the vehicle motion parameters include vehicle speed, steering wheel angle, throttle pedal opening, longitudinal acceleration, and lateral acceleration; The pressure assessment component is used to receive the driver's pulse information and galvanic skin physiological information collected by the vehicle driver physiological collector, and determine whether the driver is in a sudden driving pressure state according to the driver's pulse information and galvanic skin physiological information; the pressure assessment component has pre-stored the heart rate variability threshold and galvanic skin growth rate threshold of the driver under normal driving pressure; Determining whether the driver is in a sudden driving pressure state according to the driver's pulse information and galvanic skin physiological information includes that the standard deviation SDNN of the driver's heart rate variability is greater than the set electrocardiogram threshold and the galvanic skin growth rate DR is greater than the set galvanic skin threshold, and it is determined that the driver is in a sudden driving pressure state; The standard deviation SDNN of heart rate variability is shown as follows: Wherein, N represents the number of normal heartbeats, represents the number of heartbeats in the i-th N-N interval, represents the average number of heartbeats in N intervals; The galvanic skin growth rate DR is shown as follows: where, EDA i represents the electrodermal activity value at the i-th moment; represents the electrodermal activity value under normal driving; The event upload component is used to upload the driver's operation information, vehicle traffic environment information, and vehicle motion parameters before and after sudden driving pressure; The event analysis component includes a driving pressure surge event type library, which is used to determine the event type of the sudden pressure surge event that occurs to the driver under sudden driving pressure according to the uploaded driver's operation information, vehicle traffic environment information, and vehicle motion parameters; The push component includes a communicator and a driving pressure surge event analysis library. The push component is used to compare the driving pressure surge event type with the driving pressure surge event analysis library, retrieve the driving pressure surge event process, cause, and corresponding improvement measures, and organize and generate a help document; The push component is also used to wirelessly connect to the driver's mobile phone using the communicator and send the help document to the driver through the communicator.

2. The system for reducing sudden surges in driver driving stress according to claim 1, wherein Both the pulse sensor and the galvanic skin sensor are arranged on the vehicle steering wheel.

3. The system for reducing sudden surges in a driver's driving stress according to claim 1, wherein The driver camera is arranged directly in front of the driver's line of sight during normal driving.

4. A method for reducing sudden surges in driver driving stress, based on the system for reducing sudden surges in driver driving stress according to claim 1, characterized in that, It includes the following steps: Step 1, during the driver's driving process, the driver camera collects the driver's operation information, the vehicle camera collects the vehicle traffic environment information, the vehicle motion parameter collector collects the vehicle motion parameters, the pulse sensor collects the driver's pulse information, and the galvanic skin sensor collects the driver's galvanic skin physiological information; Step 2, the pressure assessment component calculates the standard deviation SDNN of the driver's heart rate variability and the galvanic skin growth rate DR according to the pulse information and galvanic skin physiological information; Step 3, when the SDNN of the driver's heart rate variability is greater than the set electrocardiogram threshold and the DR of the skin conductance growth rate is greater than the set skin conductance threshold, it is determined that the driver is in a sudden driving stress state, that is, a sudden stress surge event has occurred; Step 4, the event upload component sends the driver operation information, vehicle traffic environment information, and vehicle motion parameter information within a set time before and after the driver experiences sudden driving stress to the event analysis component; Step 5, the event analysis component compares the driver operation information, vehicle traffic environment information, and vehicle motion parameter information with the driving stress surge event type library to obtain the driving stress surge event type, and sends the event type to the push component; Step 6, the push component compares the driving stress surge event type with the driving stress surge event analysis library, retrieves the driving stress surge event process, cause, and corresponding improvement measures, and organizes and generates a help document; finally, the push component sends the help document to the driver.

5. The method for reducing sudden driving stress surge events of a driver according to claim 4, characterized in that, In Step 2, the standard deviation SDNN of the heart rate variability is shown as follows: Where N represents the number of normal heartbeats, represents the number of heartbeats in the i-th N-N interval, represents the average number of heartbeats in N intervals; The skin conductance growth rate DR is shown as follows: where, EDA i represents the electrodermal activity value at the i-th moment; represents the electrodermal activity value under normal driving.

6. The method for reducing sudden surges in driver driving stress according to claim 4, characterized in that, In Step 3, the set electrocardiogram threshold is 1.1 times the SDNN threshold of the heart rate variability under normal driving, and the set skin conductance threshold is 1.1 times the DR threshold of the skin conductance growth rate under normal driving.

7. The method for reducing sudden driving stress surge events of a driver according to claim 4, characterized in that In Step 4, the set time is 10 seconds.

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