An adaptive adjustment method for driving comfort in commercial vehicles

Abstract

This invention discloses an adaptive adjustment method for driving comfort in commercial vehicles, belonging to the field of vehicle control technology. The method includes acquiring the driver's physiological parameters and seat position; pre-storing parameters of the most comfortable driving posture and a seat distance relationship model to obtain a suitable seat distance; calculating the theoretical values ​​of the driver's knee height and hip angle; and adjusting the seat position based on reference knee height and reference hip angle. The method also involves adjusting the steering wheel vertically according to the positional relationship between the steering wheel's field of vision and the instrument cluster model, and adjusting the steering wheel longitudinally according to the driver's elbow angle and a reference elbow angle. Finally, based on the positional relationship between the rearview mirror's field of vision coverage area and the national standard field of vision area, the method controls the rearview mirror to rotate along the Z / Y axis, adaptively ensuring that the rearview mirror's field of vision completely covers the national standard field of vision area. This invention solves the problem in existing technologies where the driver needs to manually adjust the optimal driving position.

Description

Technical Field

[0001] This invention relates to an adaptive adjustment method for driving comfort in commercial vehicles, belonging to the field of vehicle control technology. Background Technology

[0002] With the rapid development of automotive electronics technology and the increasing demands of consumers for quality of life, consumers' requirements for vehicles are also gradually increasing, especially in the commercial vehicle sector. Due to the frequent long driving hours, drivers are increasingly demanding comfort, safety, and intelligent features.

[0003] However, currently, commercial vehicle driver's seats are primarily adjusted manually. Drivers adjust the seat position according to their height and personal preference, but this adjusted posture is not a suitable reference posture for long-term sitting, easily causing driver fatigue. Furthermore, manually adjusting the seat while driving also poses significant safety hazards. While commercial vehicle rearview mirrors now have manual and electric adjustment functions, even electric adjustment requires manual operation by the driver. The adjusted mirror position may not meet visibility requirements, and further adjustments while driving compromise driving safety. Commercial vehicle steering wheels now have mechanical or pneumatic adjustment functions, but both methods require manual operation. Manually adjusted positions can obstruct the instrument panel or cause discomfort for the arm. Summary of the Invention

[0004] The purpose of this invention is to provide an adaptive adjustment method for driving comfort in commercial vehicles. By adaptively adjusting the seat position, rearview mirror angle, and steering wheel position, the driver is placed in the most comfortable driving position. This solves the problem in the prior art that the driver needs to manually adjust the optimal driving position, reduces the frequency of manual operation by the driver, reduces fatigue during long-distance driving, and effectively improves the comfort and safety of commercial vehicle drivers.

[0005] To solve the above-mentioned technical problems, the present invention is implemented using the following technical solution:

[0006] This invention provides a method for adaptive adjustment of driving comfort in commercial vehicles, comprising:

[0007] Obtain the driver's height, weight, elbow angle, knee height, eye position, and seat position;

[0008] Pre-store parameters of the most comfortable driving posture and a model of seat distance relationships;

[0009] The parameters for the most comfortable driving posture include seat reference point, foot position point, ankle angle, pedal angle, knee height, reference knee angle, reference hip angle, reference elbow angle, seat H-point trajectory, seat back angle, vehicle boundary, ground line information, rearview mirror model, steering wheel model, and instrument cluster model.

[0010] The seat distance relationship model includes the X-direction distance relationship model from seat H point to foot position point and the Z-direction distance relationship model from seat H point to cab floor plane;

[0011] Based on the driver's height and weight, seat position, seat H-point trajectory, and seat distance relationship model, the appropriate seat distance is obtained;

[0012] Based on the adapted seat distance, ankle angle, pedal angle, knee height, seat H-point trajectory, seat position, and seat back angle, calculate the theoretical values ​​of the driver's knee angle and hip angle, and adjust the seat position based on the reference knee angle and reference hip angle.

[0013] Construct the steering wheel field of vision area based on the driver's eye position, steering wheel model, and instrument cluster model;

[0014] Adjust the steering wheel vertically according to the positional relationship between the steering wheel's field of vision and the instrument cluster model; adjust the steering wheel forward and backward according to the driver's elbow angle and the reference elbow angle.

[0015] Construct a national standard field of vision area based on seat reference points and vehicle boundaries;

[0016] The rearview mirror field of view is constructed based on the driver's eye position, the rearview mirror model, and the national standard field of view area;

[0017] The rearview mirror rotation is controlled according to the positional relationship between the rearview mirror's field of view coverage area and the national standard field of view area, so that the rearview mirror's field of view area completely covers the national standard field of view area.

[0018] Furthermore, sensors are used to obtain the driver's height, weight, elbow angle, foot position, eye position, knee height, seat position, rearview mirror rotation angle, and steering wheel position.

[0019] Furthermore, based on the driver's height and weight, seat position, seat H-point trajectory, and the aforementioned seat distance relationship model, a suitable seat distance is obtained, including:

[0020] Set the seat position so that the seat H point coincides with the seat reference point;

[0021] Based on the driver's height and weight and the trajectory of point H on the seat, the Z-direction distance from point H on the seat to the floor of the cab is obtained.

[0022] Input the Z-axis distance from seat H point to the driver's cab floor plane into the seat distance relationship model to obtain the X-axis distance from seat H point to the foot position point;

[0023] The Z-direction distance from seat H point to the cab floor and the X-direction distance from seat H point to the foot position point are used as the matching seat distances.

[0024] Furthermore, the seat distance relationship model is expressed as follows:

[0025] ;

[0026] In the formula, - H1 and H2 represent the X-axis distance from point H on the seat to the foot position for people in category ag, respectively, and H30 represents the Z-axis distance from point H on the seat to the floor of the driver's cab. - These represent the height correction values ​​for the ag group, with k1-k7 corresponding to the body mass index (BMI) of the ag group. Specifically, the a group is defined as having a height of 1.9m or more, the b group as having a height between 1.85m and 1.9m, the c group as having a height between 1.75m and 1.85m, the d group as having a height between 1.7m and 1.75m, the e group as having a height between 1.65m and 1.7m, the f group as having a height between 1.6m and 1.65m, and the g group as having a height below 1.6m.

[0027] Furthermore, based on the adapted seat distance, ankle angle, pedal angle, knee height, seat H-point trajectory, seat position, and seat back angle, the theoretical values ​​of the driver's knee angle and hip angle are calculated, and the seat position is adjusted based on the reference knee angle and reference hip angle, including:

[0028] Within a preset time period, repeat the following steps to adjust the seat position until the difference between the theoretical value of the driver's knee angle and the reference knee angle, and the difference between the theoretical value of the hip angle and the reference hip angle are within the preset range:

[0029] Based on the appropriate seat distance, ankle angle value, pedal angle value, knee height, Z-direction distance from seat H point to the cab floor plane, seat H point trajectory, seat position and seat back angle value, as well as the theoretical values ​​of knee angle and hip angle, the theoretical values ​​of the driver's knee angle and hip angle are obtained.

[0030] When the theoretical values ​​of the driver's knee angle and hip angle are less than the reference knee angle and reference hip angle, adjust the seat to move backward and downward along the seat H-point trajectory;

[0031] When the theoretical values ​​of the driver's knee angle and hip angle are greater than the reference knee angle and reference hip angle, the seat is adjusted to move forward and upward along the seat H-point trajectory;

[0032] The theoretical formula for calculating the knee angle is expressed as follows:

[0033] ;

[0034] In the formula, This represents the theoretical value of the knee angle. This represents the angle between the lower leg and a horizontal perpendicular plane passing through the point where the lower leg connects to the thigh. This represents the angle between the thigh and a horizontal perpendicular plane passing through the point where the lower leg connects to the thigh. Indicates the ankle angle value. Indicates the pedal angle value. Represents the arctangent function. Represents the tangent function. This represents the Z-axis distance from point H of the seat to the floor of the driver's cab. Indicates knee height;

[0035] The theoretical formula for calculating the hip angle is as follows:

[0036] ;

[0037] ;

[0038] In the formula, This represents the theoretical value of the hip angle. This represents the angle between the thigh and a horizontal perpendicular plane passing through the point where the thigh connects to the torso. This indicates the seat position and seat back angle.

[0039] Furthermore, based on the driver's eye position, the steering wheel model, and the instrument cluster model, a steering wheel field of vision is constructed, including:

[0040] Along the boundary of the steering wheel model, on the plane where the instrument cluster model is located, starting from the driver's eye position, draw several rays with uniform angles that intersect the plane where the instrument cluster model is located. Connect the intersection points of these rays with the plane where the instrument cluster model is located to obtain the steering wheel field of vision area.

[0041] Furthermore, based on the positional relationship between the steering wheel's field of vision and the instrument cluster model, the steering wheel is adjusted vertically, including;

[0042] When the height H10 from the upper boundary of the steering wheel's field of vision to the upper plane of the instrument cluster model is less than the reference value, the steering wheel is controlled to move upward, adaptively making the steering wheel's field of vision completely cover the instrument cluster model.

[0043] When the height H10 from the upper boundary of the steering wheel's field of vision to the upper plane of the instrument cluster model is greater than the reference value, the steering wheel is controlled to move downwards, adaptively making the steering wheel's field of vision completely cover the instrument cluster model.

[0044] Furthermore, the steering wheel is adjusted in the fore-and-aft direction based on the driver's elbow angle and a reference elbow angle, including:

[0045] When the driver's elbow angle is larger than the reference elbow angle, the steering wheel is moved backward to adaptively adjust the driver's elbow angle to match the reference elbow angle.

[0046] When the driver's elbow angle is smaller than the reference elbow angle, the steering wheel is moved forward to adaptively adjust the driver's elbow angle to match the reference elbow angle.

[0047] Furthermore, based on the driver's eye position, the rearview mirror model, and the national standard field of view area, the rearview mirror field of view area is constructed, including:

[0048] Along the plane of the ground line, along the edge of the rearview mirror model lens, starting from the driver's eye position, draw several rays with uniform angles that intersect the plane of the national standard field of view. Connect the intersection points of these rays with the plane of the national standard field of view to obtain the rearview mirror field of view.

[0049] Furthermore, the rotation of the rearview mirror is controlled according to the positional relationship between the rearview mirror's field of view coverage area and the national standard field of view area, so that the rearview mirror's field of view area completely covers the national standard field of view area, including:

[0050] Based on the driver's eye position, the positional relationship between the rearview mirror model and the ground, the rearview mirror's field of view coverage area relative to the ground is constructed.

[0051] Based on the positional relationship between the rearview mirror's field of view coverage area and the national standard field of view area, the rearview mirror's vertical rotation along the Y-axis and horizontal rotation along the Z-axis are controlled to adaptively ensure that the rearview mirror's field of view area completely covers the national standard field of view area.

[0052] The formula for calculating the vertical rotation angle along the Y-axis is as follows:

[0053] ;

[0054] In the formula, This indicates the vertical rotation angle along the Y-axis. This indicates the Y-axis distance between the rearview mirror's field of view coverage area and the national standard field of view area. It represents the distance between the vertical point on the ground where the center point of the upper edge of the rearview mirror is located and the intersection point where the line of sight extending from the center point of the upper edge of the rearview mirror extends to the ground.

[0055] The formula for calculating the left and right rotation angles along the Z-axis is as follows:

[0056] ;

[0057] In the formula, This indicates the left and right rotation angles along the Z-axis. This indicates the X-axis distance between the rearview mirror's field of view coverage area and the national standard field of view area. It represents the distance between the vertical point on the ground where the center point of the right edge of the rearview mirror is located and the intersection point where the line of sight extending from the center point of the right edge of the rearview mirror extends to the ground.

[0058] Compared with the prior art, the beneficial effects achieved by the present invention are as follows:

[0059] 1. This invention collects the driver's personalized physiological parameters and seat position information, and combines this with pre-set parameters for the most comfortable driving posture and a seat distance relationship model to calculate the optimal adjustment scheme for the seat position, steering wheel, and rearview mirrors for each driver. This significantly improves driving comfort, reduces fatigue caused by long-distance driving, and ensures the driver has the best field of vision, including a clear instrument cluster display, an unobstructed steering wheel view, and rearview mirror coverage that fully meets national standards, thereby effectively enhancing driving safety and handling. Furthermore, this invention achieves a high degree of automated adjustment, reducing the time and difficulty of manual adjustments and improving the convenience and intelligence of the driving experience.

[0060] 2. This invention not only focuses on seat adjustment, but also achieves comprehensive optimization of the driver's field of vision by comprehensively considering the relationship between the steering wheel, rearview mirror and the driver's eye position. By calculating the instrument cluster model, steering wheel field of vision and rearview mirror field of vision, and adaptively adjusting according to the differences between these field of vision and the standard field of vision, it ensures that the driver has a clear and unobstructed field of vision during driving, thereby improving driving safety and driving control.

[0061] 3. This invention achieves a high degree of intelligent and automated adjustment. By collecting data from sensors and using pre-stored seat distance models, it automatically calculates the optimal adjustment scheme for the seat, steering wheel, and rearview mirror. The driver only needs to operate the system simply or even without any operation, and the system can automatically complete the adjustment, greatly improving the convenience and intelligence of the driving experience. Attached Figure Description

[0062] Figure 1 This is a flowchart illustrating an adaptive adjustment method for driving comfort in commercial vehicles provided in an embodiment of the present invention.

[0063] Figure 2 This is an isometric schematic diagram of the steering wheel area of ​​the driver's cab provided in an embodiment of the present invention;

[0064] Figure 3 This is an isometric schematic diagram of the front area of ​​the driver's cab provided in an embodiment of the present invention;

[0065] Figure 4This is an isometric schematic diagram of the seat provided in an embodiment of the present invention;

[0066] Figure 5 This is a schematic diagram of the driver's seating posture provided in an embodiment of the present invention;

[0067] Figure 6 This is a schematic diagram of the driver's field of vision provided in an embodiment of the present invention;

[0068] Figure 7 This is a schematic diagram of the driver observation instrument cluster provided in an embodiment of the present invention;

[0069] Figure 8 This is a schematic diagram of the combined instrument model provided in an embodiment of the present invention;

[0070] Figure 9 This is a schematic diagram of the knee angle and hip angle provided in an embodiment of the present invention;

[0071] Figure 10 This is a schematic diagram illustrating the calculation principle of the steering wheel field of vision area provided in an embodiment of the present invention;

[0072] Reference numerals: 1-Cockpit; 2-Rearview mirror; 3-Seat; 4-Steering wheel model; 5-Seat belt; 6-Cockpit floor; 7-Pedal; 8-Seat backrest; 9-Seat base; 10-Seat H-point; 11-Cockpit front panel; 12-Door; 13-Eye position; 14-Seat belt buckle; 15-Ankle angle; 16-Knee angle; 17-Hip angle; 18-Elbow angle; 19-Foot position point; 20-Thigh-to-torso connection point; 21-Pedal angle; 22-Seat position and seat backrest angle; 23-Instrument cluster model; 24-Line of view. Detailed Implementation

[0073] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of the present invention and the specific features in the embodiments are detailed descriptions of the technical solution of the present invention, rather than limitations thereof. In the absence of conflict, the embodiments of the present invention and the technical features in the embodiments can be combined with each other.

[0074] The term "and / or" simply describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. Additionally, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0075] Example 1

[0076] like Figure 1 As shown in the figure, this embodiment introduces an adaptive adjustment method for driving comfort of commercial vehicles, including:

[0077] Step 1: Obtain the driver's height, weight, elbow angle, knee height, eye position 13, and seat position.

[0078] In some embodiments, the driver's height, weight, elbow angle 18, eye position 13, knee height H20, seat position, rearview mirror rotation angle, and steering wheel position are acquired by sensors.

[0079] Figure 2 This is an isometric schematic diagram of the driver's cab steering wheel area provided in an embodiment of the present invention, including a driver's cab 1, a seat 3, a steering wheel model 4, a driver's cab floor 6, a pedal 7, and a door 12.

[0080] Figure 3 This is an isometric schematic diagram of the front cab area provided in an embodiment of the present invention, including a rearview mirror 2 and a front cab 11.

[0081] Figure 4 This is an isometric schematic diagram of a seat provided in an embodiment of the present invention, including a seat belt 5, a seat back 8, a seat base 9, a seat H point 10, and a seat belt buckle 14.

[0082] Figure 5 This is a schematic diagram of the driver's sitting posture provided in an embodiment of the present invention, including eye point position 13, ankle angle 15, knee angle 16, hip angle 17, elbow angle 18, foot position point 19, and thigh and torso connection point 20.

[0083] like Figures 2-5 As shown, in this embodiment, a first sensor is installed on the pedal 7 to detect the driver's height; a second sensor and a third sensor are installed on the seat base 9. After the driver fastens the seat belt 5, the connection point 20 between the thigh and torso coincides with the seat H point 10, which are used to detect the driver's weight and seat position, respectively; a fourth sensor is installed on the rearview mirror 2 to detect the rearview mirror rotation angle; a fifth sensor is installed on the steering wheel to detect the steering wheel position; a sixth sensor and a seventh sensor are installed on the driver's cab floor 6 to detect the driver's foot position and knee height; an eighth sensor is installed in front of the vehicle to detect the driver's eye position 13; and a ninth sensor is installed on the driver's arm to detect the driver's elbow angle 18.

[0084] Step 2: Pre-store the parameters of the most comfortable driving posture and the seat distance relationship model.

[0085] In some embodiments, the parameters of the most comfortable driving posture include the seat reference point, foot position point 19, ankle angle 15, pedal angle, knee height H20, reference knee angle, reference hip angle, reference elbow angle, seat H-point trajectory, seat back angle, vehicle boundary, ground line information, rearview mirror model, steering wheel model 4, and instrument cluster model 23.

[0086] In this embodiment, the most comfortable driving posture is obtained through competitive analysis, simulation analysis, or actual user evaluation and data collection. When the seat 3 moves, the sensors arranged on the seat base 9 can collect the movement distance of the seat 3 and adjust the seat position in real time in 10mm increments until the knee angle 16 and hip angle 17 are equal to or approximately equal to the preset comfort value within the allowable range.

[0087] In some embodiments, the seat distance relationship model includes an X-direction distance relationship model from seat H point 10 to foot position point 19 and a Z-direction distance relationship model from seat H point 10 to the driver's cab floor 6 plane.

[0088] In this embodiment, the seat distance relationship model is represented as follows:

[0089] ;

[0090] In the formula, - H1 and H2 represent the X-axis distance from point H on the seat to the foot position for people in category ag, respectively, and H30 represents the Z-axis distance from point H on the seat to the floor of the driver's cab. - These represent the height correction values ​​for the ag group, with k1-k7 corresponding to the body mass index (BMI) of the ag group. Specifically, the a group is defined as having a height of 1.9m or more, the b group as having a height between 1.85m and 1.9m, the c group as having a height between 1.75m and 1.85m, the d group as having a height between 1.7m and 1.75m, the e group as having a height between 1.65m and 1.7m, the f group as having a height between 1.6m and 1.65m, and the g group as having a height below 1.6m.

[0091] Step 3: Based on the driver's height and weight, seat position, seat H-point trajectory, and the seat distance relationship model, obtain the appropriate seat distance.

[0092] In some embodiments, when drivers of different heights are seated, a suitable seat distance is obtained based on the driver's height and weight, seat position, seat H-point trajectory, and the seat distance relationship model, including:

[0093] The seat position is set so that seat H point 10 coincides with seat reference point, which is taken as the seat position;

[0094] Based on the driver's height and weight and the trajectory of point H on the seat, the Z-direction distance from point H10 on the seat to the plane 6 of the cab floor is obtained.

[0095] Input the Z-direction distance from seat H point 10 to the driver's cab floor 6 plane into the seat distance relationship model to obtain the X-direction distance from seat H point 10 to foot position point 19;

[0096] The Z-direction distance from seat H point 10 to the cab floor 6 plane and the X-direction distance from seat H point to the foot position point are used as the matching seat distances.

[0097] Step 4: Based on the appropriate seat distance, ankle angle 15, pedal angle 21, knee height H20, Z-direction distance H30 from seat H point to the driver's cab floor plane, seat H point trajectory, seat position, and seat back angle 22, calculate the theoretical values ​​of the driver's knee angle and hip angle, and adjust the seat position based on the reference knee angle and reference hip angle.

[0098] In some embodiments, based on the adapted seat distance, ankle angle 15, pedal angle 21, knee height H20, Z-direction distance H30 from seat H point to the driver's cab floor plane, seat H point trajectory, seat position, and seat back angle 22, the theoretical values ​​of the driver's knee angle and hip angle are calculated, and the seat position is adjusted based on the reference knee angle and reference hip angle, including:

[0099] like Figure 9 As shown, within a preset time, repeat the following steps to adjust the seat position until the difference between the theoretical value of the driver's knee angle and the reference knee angle, and the difference between the theoretical value of the hip angle and the reference hip angle, are within the preset range:

[0100] Based on the appropriate seat distance, ankle angle value, pedal angle value, knee height, Z-direction distance from seat H point to the cab floor plane, seat H point trajectory, seat position and seat back angle value, as well as the theoretical values ​​of knee angle and hip angle, the theoretical values ​​of the driver's knee angle and hip angle are obtained.

[0101] When the theoretical values ​​of the driver's knee angle and hip angle are less than the reference knee angle and reference hip angle, adjust the seat to move backward and downward along the seat H-point trajectory;

[0102] When the theoretical values ​​of the driver's knee angle and hip angle are greater than the reference knee angle and reference hip angle, the seat is adjusted to move forward and upward along the seat H-point trajectory;

[0103] The theoretical formula for calculating the knee angle is expressed as follows:

[0104] ;

[0105] In the formula, This represents the theoretical value of the knee angle. This represents the angle between the lower leg and a horizontal perpendicular plane passing through the point where the lower leg connects to the thigh. This represents the angle between the thigh and a horizontal perpendicular plane passing through the point where the lower leg connects to the thigh. Indicates the ankle angle value. Indicates the pedal angle value. Represents the arctangent function. Represents the tangent function. This represents the Z-axis distance from point H of the seat to the floor of the driver's cab. Indicates knee height;

[0106] The theoretical formula for calculating the hip angle is as follows:

[0107] ;

[0108] ;

[0109] In the formula, This represents the theoretical value of the hip angle. This represents the angle between the thigh and a horizontal perpendicular plane passing through the point where the thigh connects to the torso. This indicates the seat position and seat back angle.

[0110] In this embodiment, "rear" is defined as the direction closer to the driver, and "front" is defined as the direction farther away from the driver.

[0111] Step 5: Construct the steering wheel field of vision area based on the driver's eye position, the steering wheel model, and the instrument cluster model.

[0112] In some embodiments, the L1 region of the combined instrument model is obtained based on the combined instrument model 23;

[0113] like Figure 10 As shown, based on the driver's eye position 13, the steering wheel model 4, and the instrument cluster model 23, the steering wheel field of vision area L2 is obtained, which includes:

[0114] Along the boundary L3 of the steering wheel model on the plane where the instrument cluster model 23 is located, starting from the driver's eye position 13, draw several rays with uniform angles that intersect the plane where the instrument cluster model 23 is located. Connect the intersection points of the several rays with the plane where the instrument cluster model 23 is located to obtain the steering wheel field of vision area L2.

[0115] The height from the upper boundary of the steering wheel field of vision L2 to the upper plane of the instrument cluster model 23 is represented as:

[0116] ;

[0117] In the formula, This indicates the height from the upper boundary of the steering wheel's field of vision to the upper plane of the instrument cluster model. The radius of the steering wheel model. This is the distance between the intersection of the eye point position and the steering wheel model position along the line of vision. The distances between the intersection of the eye point position and the steering wheel model position along the line of vision, and between the intersection of the eye point position and the instrument cluster model. For the width of the instrument cluster model, This is a correction value for the height group category corresponding to the driver.

[0118] Step 6: Adjust the steering wheel vertically according to the positional relationship between the steering wheel's field of vision and the instrument cluster model, and adjust the steering wheel forward and backward according to the driver's elbow angle and the reference elbow angle.

[0119] Figure 7 This is a schematic diagram of the driver observation instrument cluster provided in an embodiment of the present invention.

[0120] Figure 8 This is a schematic diagram of the combined instrument model provided in an embodiment of the present invention.

[0121] like Figure 7 , Figure 8 As shown, in some embodiments, the steering wheel is adjusted vertically according to the positional relationship between the steering wheel field of vision area L2 and the instrument cluster model L1, including:

[0122] When the steering wheel field of view L2 overlaps with the upper part of the instrument cluster model L1, the steering wheel is controlled to move upward, adaptively making the steering wheel field of view L2 completely cover the instrument cluster model.

[0123] When the steering wheel field of view L2 overlaps with the lower part of the instrument cluster model L1, the steering wheel is controlled to move downwards, adaptively making the steering wheel field of view L2 completely cover the instrument cluster model L1.

[0124] In some embodiments, adjusting the steering wheel in the fore-and-aft direction based on the driver's elbow angle and a reference elbow angle includes:

[0125] When the driver's elbow angle is larger than the reference elbow angle, the steering wheel is moved backward to adaptively adjust the driver's elbow angle to match the reference elbow angle.

[0126] When the driver's elbow angle is smaller than the reference elbow angle, the steering wheel is moved forward to adaptively adjust the driver's elbow angle to match the reference elbow angle.

[0127] Step 7: Based on the seat reference point and vehicle boundary, construct the national standard field of vision area. Based on the driver's eye position, the rearview mirror model, and the national standard field of vision area, construct the rearview mirror field of vision area.

[0128] In some embodiments, the rearview mirror field of view is constructed based on the driver's eye position, the rearview mirror model, and the national standard field of view area, including:

[0129] Along the plane of the ground line, along the edge of the rearview mirror model lens, starting from the driver's eye point position 13, draw several rays with uniform angles that intersect the plane of the national standard field of view. Connect the intersection points of these rays with the plane of the national standard field of view to obtain the rearview mirror field of view.

[0130] Step 8: Control the rotation of the rearview mirror according to the positional relationship between the rearview mirror's field of view coverage area and the national standard field of view area, so that the rearview mirror's field of view area completely covers the national standard field of view area.

[0131] In some embodiments, controlling the rotation of the rearview mirror according to the positional relationship between the rearview mirror's field of view coverage area and the national standard field of view area, so that the rearview mirror's field of view area completely covers the national standard field of view area, includes:

[0132] Based on the driver's eye position, the positional relationship between the rearview mirror model and the ground, the rearview mirror's field of view coverage area relative to the ground is constructed.

[0133] Based on the positional relationship between the rearview mirror's field of view coverage area and the national standard field of view area, the rearview mirror's vertical rotation along the Y-axis and horizontal rotation along the Z-axis are controlled to adaptively ensure that the rearview mirror's field of view area completely covers the national standard field of view area.

[0134] The formula for calculating the vertical rotation angle along the Y-axis is as follows:

[0135] ;

[0136] In the formula, This indicates the vertical rotation angle along the Y-axis. This indicates the Y-axis distance between the rearview mirror's field of view coverage area and the national standard field of view area. The distance between the vertical point on the ground where the center point of the upper edge of the rearview mirror is located and the intersection point where the line of sight of the center point of the upper edge of the rearview mirror extends to the ground;

[0137] The formula for calculating the left and right rotation angles along the Z-axis is as follows:

[0138] ;

[0139] In the formula, This indicates the left and right rotation angles along the Z-axis. This indicates the X-axis distance between the rearview mirror's field of view coverage area and the national standard field of view area. The distance between the vertical point on the ground where the center point of the right edge of the rearview mirror is located and the intersection point where the line of sight extending from the center point of the right edge of the rearview mirror extends to the ground.

[0140] like Figure 6As shown, in this embodiment, based on the seat reference point and the vehicle boundary, the national standard field of view area defg is obtained, which is enclosed by points d, e, f and g. Along the boundary of the rearview mirror model lens on the plane where the ground line is located, several rays with uniform angles are drawn sequentially from the driver's eye point position 13 to intersect the plane where the national standard field of view area is located. Connecting the intersection points of the several rays with the plane where the national standard field of view area is located, the rearview mirror field of view coverage area ABCDEF is obtained, which is enclosed by points A, B, C, D, E and F.

[0141] Example 2

[0142] Based on the same inventive concept as other embodiments, this embodiment introduces a computer-readable storage medium storing computer instructions thereon, characterized in that the computer instructions, when executed by a processor, implement the steps of the methods of Embodiment 1 or 2 described above.

[0143] Example 3

[0144] Based on the same inventive concept as other embodiments, this embodiment also provides a computer program product, including computer instructions, characterized in that, when executed by a processor, the computer instructions implement the steps of the methods of Embodiment 1 or 2 described above.

[0145] In summary, this invention, by collecting the driver's personalized physiological parameters and seat position information, and combining them with pre-set optimal driving posture parameters and seat distance relationship models, calculates the optimal adjustment scheme for the seat position, steering wheel, and rearview mirrors for each driver. This significantly improves driving comfort, reduces fatigue caused by long-distance driving, and ensures the driver has the best field of vision, including a clear instrument cluster display, an unobstructed steering wheel view, and rearview mirror coverage that fully meets national standards, thereby effectively enhancing driving safety and handling. Furthermore, this invention achieves a high degree of automated adjustment, reducing the time and difficulty of manual adjustments and improving the convenience and intelligence of the driving experience.

[0146] This invention not only focuses on seat adjustment, but also achieves comprehensive optimization of the driver's field of vision by comprehensively considering the relationship between the steering wheel, rearview mirror and the driver's eye position. By calculating the instrument cluster model, steering wheel field of vision and rearview mirror field of vision, and adaptively adjusting according to the differences between these field of vision and the standard field of vision, it ensures that the driver has a clear and unobstructed field of vision during driving, thereby improving driving safety and driving control.

[0147] This invention achieves a high degree of intelligent and automated adjustment. By collecting data from sensors and using pre-stored seat distance models, it automatically calculates the optimal adjustment scheme for the seat, steering wheel, and rearview mirror. The driver only needs to operate the system simply or even without any operation, and the system can automatically complete the adjustment, greatly improving the convenience and intelligence of the driving experience.

[0148] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0149] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0150] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0151] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0152] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

Claims

1. A method for adaptive adjustment of driving comfort in commercial vehicles, characterized in that, include: Obtain the driver's height, weight, elbow angle, knee height, eye position, and seat position; Pre-store parameters of the most comfortable driving posture and a model of seat distance relationship; The parameters for the most comfortable driving posture include seat reference point, foot position point, ankle angle, pedal angle, knee height, reference knee angle, reference hip angle, reference elbow angle, seat H-point trajectory, seat back angle, vehicle boundary, ground line information, rearview mirror model, steering wheel model, and instrument cluster model. Construct a national standard field of vision area based on seat reference points and vehicle boundaries; The rearview mirror field of view is constructed based on the driver's eye position, the rearview mirror model, and the national standard field of view area; The rearview mirror rotation is controlled according to the positional relationship between its field of view and the national standard field of view, ensuring that the rearview mirror's field of view completely covers the national standard field of view, including: Based on the driver's eye position, the positional relationship between the rearview mirror model and the ground, the rearview mirror's field of view coverage area relative to the ground is constructed. Based on the positional relationship between the rearview mirror's field of view coverage area and the national standard field of view area, the rearview mirror's vertical rotation along the Y-axis and horizontal rotation along the Z-axis are controlled to adaptively ensure that the rearview mirror's field of view area completely covers the national standard field of view area. The formula for calculating the vertical rotation angle along the Y-axis is as follows: ； In the formula, This indicates the vertical rotation angle along the Y-axis. This indicates the X-axis distance between the rearview mirror's field of view coverage area and the national standard field of view area. It represents the distance between the vertical point on the ground where the center point of the upper edge of the rearview mirror is located and the intersection point where the line of sight from the center point of the upper edge of the rearview mirror extends to the ground. The formula for calculating the left and right rotation angles along the Z-axis is as follows: ； In the formula, This indicates the left and right rotation angles along the Z-axis. This indicates the Y-axis distance between the rearview mirror's field of view coverage area and the national standard field of view area. It indicates the distance between the vertical point on the ground where the center point of the right edge of the rearview mirror is located and the intersection point where the line of sight from the center point of the right edge of the rearview mirror extends to the ground.

2. The adaptive adjustment method for driving comfort of commercial vehicles according to claim 1, characterized in that, The seat distance relationship model includes the X-direction distance relationship model from seat H point to foot position point and the Z-direction distance relationship model from seat H point to cab floor plane; Based on the driver's height and weight, seat position, seat H-point trajectory, and seat distance relationship model, the appropriate seat distance is obtained; Based on the adapted seat distance, ankle angle, pedal angle, knee height, seat H-point trajectory, seat position, and seat back angle, calculate the theoretical values ​​of the driver's knee angle and hip angle, and adjust the seat position based on the reference knee angle and reference hip angle. Construct the steering wheel field of vision area based on the driver's eye position, steering wheel model, and instrument cluster model; Adjust the steering wheel vertically according to the positional relationship between the steering wheel's field of vision and the instrument cluster model, and adjust the steering wheel forward and backward according to the driver's elbow angle and the reference elbow angle.

3. The adaptive adjustment method for driving comfort of commercial vehicles according to claim 2, characterized in that, The system uses sensors to obtain the driver's height, weight, elbow angle, foot position, eye position, knee height, seat position, rearview mirror rotation angle, and steering wheel position.

4. The adaptive adjustment method for driving comfort of commercial vehicles according to claim 3, characterized in that, Based on the driver's height and weight, seat position, seat H-point trajectory, and the aforementioned seat distance relationship model, the appropriate seat distance is obtained, including: Set the seat position so that the seat H point coincides with the seat reference point; Based on the driver's height and weight and the trajectory of point H on the seat, the Z-direction distance from point H on the seat to the floor of the cab is obtained. Input the Z-axis distance from seat H point to the driver's cab floor plane into the seat distance relationship model to obtain the X-axis distance from seat H point to the foot position point; The Z-direction distance from seat H point to the cab floor and the X-direction distance from seat H point to the foot position point are used as the matching seat distances.

5. The adaptive adjustment method for driving comfort of commercial vehicles according to claim 4, characterized in that, The seat distance relationship model is represented as follows: ； In the formula, - H1 and H2 represent the X-axis distance from point H on the seat to the foot position for people in category ag, respectively, and H30 represents the Z-axis distance from point H on the seat to the floor of the driver's cab. - These represent the height correction values ​​for the ag group, with k1-k7 corresponding to the body mass index (BMI) of the ag group. Specifically, the a group is defined as having a height of 1.9m or more, the b group as having a height between 1.85m and 1.9m, the c group as having a height between 1.75m and 1.85m, the d group as having a height between 1.7m and 1.75m, the e group as having a height between 1.65m and 1.7m, the f group as having a height between 1.6m and 1.65m, and the g group as having a height below 1.6m.

6. The adaptive adjustment method for driving comfort of commercial vehicles according to claim 2, characterized in that, Based on the adapted seat distance, ankle angle, pedal angle, knee height, seat H-point trajectory, seat position, and seat back angle, the theoretical values ​​of the driver's knee angle and hip angle are calculated. The seat position is then adjusted based on these reference knee and hip angles, including: Within a preset time period, repeat the following steps to adjust the seat position until the difference between the theoretical value of the driver's knee angle and the reference knee angle, and the difference between the theoretical value of the hip angle and the reference hip angle are within the preset range: Based on the appropriate seat distance, ankle angle value, pedal angle value, knee height, Z-direction distance from seat H point to the cab floor plane, seat H point trajectory, seat position and seat back angle value, as well as the theoretical values ​​of knee angle and hip angle, the theoretical values ​​of the driver's knee angle and hip angle are obtained. When the theoretical values ​​of the driver's knee angle and hip angle are less than the reference knee angle and reference hip angle, adjust the seat to move backward and downward along the seat H-point trajectory; When the theoretical values ​​of the driver's knee angle and hip angle are greater than the reference knee angle and reference hip angle, the seat is adjusted to move forward and upward along the seat H-point trajectory; The theoretical formula for calculating the knee angle is expressed as follows: ； In the formula, This represents the theoretical value of the knee angle. This represents the angle between the lower leg and a horizontal perpendicular plane passing through the point where the lower leg connects to the thigh. This represents the angle between the thigh and a horizontal perpendicular plane passing through the point where the lower leg connects to the thigh. Indicates the ankle angle value. Indicates the pedal angle value. Represents the arctangent function. Represents the tangent function. This represents the Z-axis distance from point H of the seat to the floor of the driver's cab. Indicates knee height; The theoretical formula for calculating the hip angle is as follows: ； ； In the formula, This represents the theoretical value of the hip angle. This represents the angle between the thigh and a horizontal perpendicular plane passing through the point where the thigh connects to the torso. This indicates the seat position and seat back angle.

7. The adaptive adjustment method for driving comfort of commercial vehicles according to claim 2, characterized in that, Based on the driver's eye position, the steering wheel model, and the instrument cluster model, the steering wheel field of vision is constructed, including: Along the boundary of the steering wheel model, on the plane where the instrument cluster model is located, starting from the driver's eye position, draw several rays with uniform angles that intersect the plane where the instrument cluster model is located. Connect the intersection points of these rays with the plane where the instrument cluster model is located to obtain the steering wheel field of vision area.

8. The adaptive adjustment method for driving comfort of commercial vehicles according to claim 2, characterized in that, Adjust the steering wheel vertically according to the positional relationship between the steering wheel's field of vision and the instrument cluster model; When the height H10 from the upper boundary of the steering wheel's field of vision to the upper plane of the instrument cluster model is less than the reference value, the steering wheel is controlled to move upward, adaptively making the steering wheel's field of vision completely cover the instrument cluster model. When the height H10 from the upper boundary of the steering wheel's field of vision to the upper plane of the instrument cluster model is greater than the reference value, the steering wheel is controlled to move downwards, adaptively making the steering wheel's field of vision completely cover the instrument cluster model.

9. The adaptive adjustment method for driving comfort of commercial vehicles according to claim 2, characterized in that, Adjust the steering wheel in the fore-and-aft direction according to the driver's elbow angle and a reference elbow angle, including: When the driver's elbow angle is larger than the reference elbow angle, the steering wheel is moved backward to adaptively adjust the driver's elbow angle to match the reference elbow angle. When the driver's elbow angle is smaller than the reference elbow angle, the steering wheel is moved forward to adaptively adjust the driver's elbow angle to match the reference elbow angle.

10. The adaptive adjustment method for driving comfort of commercial vehicles according to claim 1, characterized in that, Based on the driver's eye position, the rearview mirror model, and the national standard field of view area, the rearview mirror field of view area is constructed, including: Along the plane of the ground line, along the edge of the rearview mirror model lens, starting from the driver's eye position, draw several rays with uniform angles that intersect the plane of the national standard field of view. Connect the intersection points of these rays with the plane of the national standard field of view to obtain the rearview mirror field of view.

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