A method for evaluating driver's mental rotation perception ability

Abstract

The present invention relates to the field of traffic safety, and in particular to a method for evaluating a driver's psychological rotation perception ability. The method of the present invention evaluates the driver's psychological rotation perception ability and quantitatively assesses the driver's psychological rotation perception ability, which is more objective and effective; according to the quantitative score of the driver's psychological rotation perception ability, the driver's driving safety quality can be improved in a targeted manner, the driver's driving ability can be enhanced, and the incidence of road traffic safety accidents can be reduced.

Description

Technical Field

[0001] The invention relates to the field of traffic safety, and in particular to a method for evaluating a driver's mental rotation perception ability. Background Art

[0002] After the vehicle enters the curved tunnel, the driver is isolated from the outside environment. The side walls of the tunnel are close to the vehicle. As the vehicle moves forward, the side walls of the tunnel flow backwards rapidly, causing the driver to have a strong sense of speed and feel that the vehicle is moving very fast. This leads to inaccurate estimates of the vehicle speed and driving distance, and the driver constantly adjusts the steering wheel, which can easily cause accidents such as rear-end collisions, scrapes with tunnel walls, and collisions with vehicles on the side.

[0003] Mental rotation refers to the process of imagining a two-dimensional or three-dimensional rotation of something in a person's mind. The theory of mental rotation can be used to explain the driving behavior and operation mechanism of drivers in curved tunnels. Drivers with strong mental rotation ability can correctly perceive the degree of rotation of the vehicle under the influence of factors such as the curvature of the tunnel section, the speed of the vehicle, and the lighting in the tunnel. The driver's correction behavior on the steering wheel will be relatively small, and the overall lateral operation behavior will be smoother and softer; people with poor mental rotation ability cannot correctly perceive the degree of rotation of the vehicle, which will cause the driver to continuously adjust the steering wheel, resulting in parameters such as the front wheel angle of the car and the lane line distance being in an unstable state, which is more prone to traffic accidents. Therefore, studying the relationship between the theory of mental rotation and the driver's steering type in curved tunnel driving is of great significance to safe driving. Summary of the invention

[0004] In view of the problems existing in the prior art, the object of the present invention is to provide a method for evaluating a driver's mental rotation perception ability.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions to achieve it.

[0006] A method for evaluating a driver's mental rotation perception ability comprises the following steps:

[0007] Step 1, let the driver drive the vehicle normally in the curved tunnel, collect vehicle driving parameters at a set collection frequency, and obtain the road turning radius or road curvature; the vehicle driving parameters include vehicle speed, lateral acceleration, front wheel angle, front wheel outer wheel speed and front wheel inner wheel speed;

[0008] Step 2, calculating the theoretical yaw angular velocity and the actual yaw angular velocity;

[0009] Step 3, calculating the driver's mental rotation perception ability in each time interval;

[0010] Step 4, calculating the driver's psychological rotation perception ability.

[0011] Compared with the prior art, the beneficial effects of the present invention are: evaluating the driver's psychological rotation perception ability and conducting a quantitative assessment of the driver's psychological rotation perception ability, which is more objective and effective; according to the quantitative score of the driver's psychological rotation perception ability, the driver's driving safety quality can be improved in a targeted manner, the driver's driving ability can be enhanced, and the incidence of road traffic accidents can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0013] Figure 1 It is a schematic diagram of the process of the present invention. DETAILED DESCRIPTION

[0014] The embodiments of the present invention will be described in detail below with reference to examples, but those skilled in the art will understand that the following examples are only used to illustrate the present invention and should not be construed as limiting the scope of the present invention.

[0015] A method for evaluating a driver's mental rotation perception ability comprises the following steps:

[0016] Step 1, let the driver drive the vehicle normally in the curved tunnel, collect vehicle driving parameters at a set collection frequency, and obtain the road turning radius or road curvature; the vehicle driving parameters include vehicle speed, lateral acceleration, front wheel angle, front wheel outer wheel speed and front wheel inner wheel speed;

[0017] Of the two front wheels, the one with the larger turning radius is the outer side, and the one with the smaller turning radius is the inner side;

[0018] Step 2, calculating the theoretical yaw angular velocity and the actual yaw angular velocity;

[0019] The vehicle's yaw angular velocity is used to indicate the driver's perception of the vehicle's rotation when driving in a curved tunnel.

[0020] The theoretical yaw rate is calculated as follows:

[0021]

[0022] In the formula, represents the theoretical yaw rate of the vehicle at the time of the i-th acquisition; (V x ) i represents the speed of the vehicle at the time of the i-th collection; R represents the turning radius of the road; cur represents the curvature of the road.

[0023] The actual yaw rate is calculated as follows:

[0024]

[0025] In the formula, represents the actual yaw angular velocity of the vehicle at the i-th acquisition; represents the first yaw rate of the vehicle at the i-th acquisition, which is calculated by the wheel speed difference estimation method; represents the second yaw rate of the vehicle at the time of the i-th acquisition, which is calculated by the lateral acceleration-vehicle speed method;

[0026] Among them, the first yaw angular velocity The calculation method is as follows:

[0027]

[0028] In the formula, (V 1 ) i is the speed of the outer front wheel; (V 2 ) i is the speed of the inner wheel of the front wheel; L is the width between the two front wheels of the vehicle, which is determined by the vehicle model and is a constant; θ i is the front wheel turning angle;

[0029] The second yaw rate The calculation method is as follows:

[0030]

[0031] In the formula, (a y ) i is the lateral acceleration.

[0032] Step 3, calculating the driver's mental rotation perception ability in each time interval;

[0033] Specifically, the total time of normal driving of a vehicle in a curved tunnel is divided into M time intervals, and it is defined that N vehicle driving parameters are collected in each time interval;

[0034] when This indicates that the driver's mental rotation perception ability is insufficient during the i-th acquisition; when It indicates that the driver's mental rotation perception ability is normal during the i-th acquisition; when This indicates that the driver's mental rotation perception ability was excessive during the i-th acquisition;

[0035] Count the number of times the driver's mental rotation perception ability is insufficient in each time interval n 1 , the number of times the driver's mental rotation perception ability is normal n 2 , the number of times the driver's mental rotation perception ability is excessive n 3 , there are n1 +n 2 +n 3 =N;

[0036] The proportion of the number of times corresponding to each driver's mental rotation perception ability in the number of collection times N is calculated respectively, and the driver's mental rotation perception ability corresponding to the largest proportion is taken as the driver's mental rotation perception ability of the time interval.

[0037] Step 4, calculating the driver's psychological rotation perception ability.

[0038] Specifically, the proportion of the time interval corresponding to each driver's psychological rotation perception ability in all time intervals is calculated respectively, and the corresponding driver's psychological rotation perception ability with the largest proportion is taken as the driver's psychological rotation perception ability of the driver.

[0039] Although the present invention has been described in detail in general terms and in specific embodiments in this specification, it is obvious to those skilled in the art that some modifications or improvements may be made to the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention all fall within the scope of protection claimed by the present invention.

Claims

1. A method for evaluating a driver's mental rotation perception ability, characterized in that: The following steps are involved: Step 1: Let the driver drive the vehicle normally in the curved tunnel, collect vehicle driving parameters at a set collection frequency, and obtain the road turning radius or road curvature; The vehicle driving parameters include vehicle speed, lateral acceleration, front wheel steering angle, front outer wheel speed and front inner wheel speed; Step 2, calculating the theoretical yaw angular velocity and the actual yaw angular velocity; The theoretical yaw rate is calculated as follows: In the formula, represents the theoretical yaw angular velocity of the vehicle at the i-th acquisition; (V x ) i represents the speed of the vehicle at the time of the i-th collection; R represents the turning radius of the road; cur represents the curvature of the road; The actual yaw rate is calculated as follows: In the formula, represents the actual yaw angular velocity of the vehicle at the i-th acquisition; represents the first yaw angular velocity of the vehicle at the i-th acquisition; represents the second yaw angular velocity of the vehicle at the i-th acquisition; Among them, the first yaw angular velocity The calculation method is as follows: Where, (V1) i is the speed of the outer front wheel; (V2) i is the speed of the inner front wheel; L is the width between the two front wheels of the vehicle; θ i is the front wheel turning angle; The second yaw rate The calculation method is as follows: In the formula, (a y ) i is the lateral acceleration; Step 3, calculating the driver's mental rotation perception ability in each time interval; Specifically, the total time of normal driving of a vehicle in a curved tunnel is divided into M time intervals, and it is defined that N vehicle driving parameters are collected in each time interval; when This indicates that the driver's mental rotation perception ability is insufficient during the i-th acquisition; when It indicates that the driver's mental rotation perception ability is normal during the i-th acquisition; when This indicates that the driver's mental rotation perception ability was excessive during the i-th acquisition; Counting the number of times the driver's mental rotation perception ability is insufficient, the number of times the driver's mental rotation perception ability is normal, and the number of times the driver's mental rotation perception ability is excessive in each time interval; Calculate the proportion of the number of times corresponding to each driver's mental rotation perception ability in the number of acquisition times N respectively, and take the driver's mental rotation perception ability corresponding to the largest proportion as the driver's mental rotation perception ability of the time interval; Step 4, calculating the driver's psychological rotation perception ability; Specifically, the proportion of the time interval corresponding to each driver's psychological rotation perception ability in all time intervals is calculated respectively, and the corresponding driver's psychological rotation perception ability with the largest proportion is taken as the driver's psychological rotation perception ability of the driver.

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