1. A method for setting the travel of an automobile driving seat suitable for the physiological characteristics of Chinese human bodies is characterized by comprising the following steps:

step one, setting a Y coordinate, a wheel center coordinate and a driver foot point (BOF) coordinate of a driver seat reference point (SgRP-1) in a whole vehicle coordinate system by combining development vehicle market positioning and the existing platform resources;

step two, a human body model containing all stature categories in a target user group is created on the basis of Ramsis software by comprehensively analyzing the physiological characteristics of the Chinese human body;

and step three, building a whole vehicle driving environment model, constraining a human body according to the actual driving state, simulating and calculating driving postures of various stature types, generating a driver seat reference point (SgRP-1) coordinate according to a simulation result, fitting all generated seat reference points (SgRP-1), and establishing a seat stroke by taking a fitted straight line as a reference.

2. The method for setting the travel of the automobile driving seat suitable for the physiological characteristics of the human body in China according to claim 1, wherein the step one specifically comprises the following processes:

s1, determining the width of the whole vehicle (W103) by considering the market positioning of the developed vehicle, and setting the Y coordinate of a driver seat reference point (SgRP-1) to be 20% of the width of the whole vehicle;

and (3) determining coordinates of front and rear wheel centers in a whole vehicle coordinate system by considering the whole vehicle height (H101) and ground clearance (H156) of the development vehicle, and determining coordinates of a pedal point according to the X-direction distance (L113) from the front wheel center to the pedal point of the platform key parameters.

The driver seat height (H30-1), i.e., the Z-direction height from the seat reference point (SgRP-1) to the heel point (AHP), is preliminarily determined.

S2, calculating an X-direction distance (L99-1) from a stepping point of a driver to a seat reference point, and determining an X coordinate of the reference point (SgRP-1) of the driver seat;

calculating the back angle (A40-1) of the driver seat to determine the torso angle of the driver in the driving state:

the X-coordinate and the Z-coordinate of the center (SWC) of the steering wheel are calculated, and the grip area of the driver in the driving state is preliminarily determined by determining the diameter of the steering wheel and the adjustment range by initial definition.

3. The method as claimed in claim 2, wherein in step S2,

the X coordinate of the driver seat reference point (SgRP-1) is as follows:

L99-1＝913.7+0.672316×(H30-1)-0.00195530×(H30-1)²

the torso angle under the driver driving state is:

A40-1＝-0.024×H30+30±1.5°。

4. the method for setting the travel of a driver' S seat in an automobile according to the physiological characteristics of the human body in China as claimed in claim 2, wherein the step S2 of calculating the X coordinate and the Z coordinate of the Steering Wheel Center (SWC) comprises:

steering wheel center X coordinate (SWCx) relative to kick point:

car: SWCx (-0.0029 × H30-1)2+0.9392 × H30-1) +500) ± 10

SUV：SWCx＝(-0.0029*(H30-1)2+0.9392*(H30-1)+515)±10

Steering wheel center Z coordinate (SWCz) relative to the seat reference point:

car: SWCz (-0.2674 × (H30-1) +443.96) ± 10

SUV：SWCz＝(-0.2674*(H30-1)+449)±10。

5. The method for setting the travel of the automobile driving seat suitable for the physiological characteristics of the human body in China according to claim 1, wherein the second step specifically comprises the following steps:

based on Ramsis software, the gender, height, body size ratio and waist circumference of a target user are considered, and a 3D human body model of a driver is created, wherein the 3D human body model comprises 126 human body models of various human bodies in China.

6. The method for setting the travel of the automobile driving seat suitable for the physiological characteristics of the human body in China according to claim 1, wherein the third step specifically comprises the following steps:

based on the pedal point, the heel point, the hand-held area of the steering wheel and the ceiling constraint 3D human body model determined in the concept design stage, simulating the actual driving working condition to calculate the human body driving posture for 126 times and extracting a corresponding seat reference point (SgRP-1);

fitting the 126 seat reference points (SgRP-1) representing various human bodies in China according to the steps to obtain a fitted straight line;

and respectively translating the fitted straight line upwards and downwards to ensure that the above 126 seat reference points are distributed between the two translated straight lines and are respectively connected with the upper and lower straight line end points, so as to obtain the driving seat stroke frame suitable for Chinese human bodies.

Background

With the continuous development of society, the automobile demand is transited to the improvement demand, and consumers put higher demands on the comfort of automobile products. In the driving process, a driver is uncomfortable in sitting posture, fatigue reaction is easily generated psychologically and physiologically, and driving safety can be affected under severe conditions. How to ensure that a driver obtains a reasonable and comfortable posture in the driving process becomes an important research subject in the vehicle development process.

Patent document 1(CN 110539824 a) discloses a driving state-based H-point travel determination method and apparatus that determine each component arrangement position, seat H-point initial position, and corresponding theoretical H-point travel frame of a developed vehicle type; adjusting the man-machine verification device until the man-machine verification device is consistent with the arrangement position of each part in the developed vehicle model, the initial position of a seat H point and a corresponding theoretical H point stroke frame; the method comprises the steps that verification and evaluation of users based on real driving states are organized, seats are respectively adjusted to the most comfortable positions and recorded, so that the actual positions of H points of the seats of all users developing vehicle types are obtained, and an optimal H point stroke frame is drawn according to the actual positions of the H points of the seats; the seat position will be adjusted or the seat will be changed so that the optimal H point stroke box is within the theoretical H point stroke box.

Patent document 2(CN 112395693 a) discloses a method for setting a travel of a front seat of an automobile, in which a seat design reference point R is determined on a 95% human body comfort curve; drawing a 2.5% human body comfort curve in a backward translation mode to form a first curve; drawing a first straight line parallel to the X axis through the R point; rotating the first straight line around the R point by an angle to form a second straight line; vertically moving the second straight line upwards and downwards respectively to obtain a third straight line and a fourth straight line; the third straight line is extended forwards to be intersected with the 2.5% human body comfort curve to form a fifth straight line, and the fourth straight line is extended backwards to be intersected with the first curve to form a sixth straight line; connecting the front end and the rear end of the straight line to respectively obtain a second curve and a third curve; the second straight line, the fifth straight line, the sixth straight line, the second curve, the third curve and the R point form the four-way adjusting slide rail stroke of the automobile seat.

Patent document 3(CN 103425809B) discloses a design method of an automobile seat, relating to the technical field of automobiles. The method comprises the following steps: s1, determining an accelerator pedal heel point AHP and an accelerator pedal reference point APP, setting a Y-direction coordinate of an H point in a finished automobile coordinate system, and establishing a vertical plane parallel to an XZ plane at the Y-direction coordinate of the H point; s2, establishing a line segment which extends along the Z axis and passes through the intersection point of the AHP and the APP in the vertical plane; s3, fitting the line segment according to the driver percentile and a set expression, and determining a suitable position line of the H point; and determining the position and the sliding angle of the automobile seat according to the suitable position line of the point H.

In the development concept design stage of the whole vehicle, the initial setting of human body arrangement, spatiality, visual field and operation convenience mostly refers to a driver seat comfort line and a seat stroke frame set according to SAE recommended standards established based on European and American human body sizes, and the method for setting the human body hard spots is not necessarily suitable for Chinese users in consideration of physiological difference judgment between European and American human bodies and Chinese human bodies.

Disclosure of Invention

In order to solve the problems in the prior art, the invention provides a method for setting the travel of an automobile driving seat suitable for Chinese human physiological characteristics, which combines development of vehicle market positioning and the setting of a Y coordinate, a wheel center coordinate and a driver foot point (BOF) coordinate of a driver seat reference point (SgRP-1) in a whole automobile coordinate system by using the existing platform resources, creates a human body model capable of containing all body types in a target user group based on Ramsis software by comprehensively analyzing the Chinese human physiological characteristics, builds a whole automobile driving environment model, restrains and simulates the driving postures of various body types according to the actual driving state, generates the coordinate of the driver seat reference point (SgRP-1) according to the simulation result, and performs one-time functional fitting treatment on all the generated seat reference points (SgRP-1) to obtain a line segment, and establishing a seat stroke suitable for Chinese human bodies by taking the line segment as a reference. The invention considers the group physiological characteristics of domestic target users, purposefully develops vehicles more suitable for Chinese human bodies, reasonably sets the travel of the driving seat, provides reference basis for human body arrangement and key hard point setting, improves the driving comfort of the users, is beneficial to improving the driving comfort and the operation convenience, and has certain guiding significance for ensuring good driving posture and driving safety.

The purpose of the invention is realized by the following technical scheme:

a method for setting the travel of an automobile driving seat suitable for the physiological characteristics of Chinese human bodies comprises the following steps:

step one, setting a Y coordinate, a wheel center coordinate and a driver foot point (BOF) coordinate of a driver seat reference point (SgRP-1) in a whole vehicle coordinate system by combining development vehicle market positioning and the existing platform resources;

step two, a human body model containing all stature categories in a target user group is created on the basis of Ramsis software by comprehensively analyzing the physiological characteristics of the Chinese human body;

and step three, building a whole vehicle driving environment model, constraining a human body according to the actual driving state, simulating and calculating driving postures of various stature types, generating a driver seat reference point (SgRP-1) coordinate according to a simulation result, fitting all generated seat reference points (SgRP-1), and establishing a seat stroke by taking a fitted straight line as a reference.

Further, the step one specifically includes the following processes:

s1, determining the width of the whole vehicle (W103) by considering the market positioning of the developed vehicle, and setting the Y coordinate of a driver seat reference point (SgRP-1) to be 20% of the width of the whole vehicle;

and (3) determining coordinates of front and rear wheel centers in a whole vehicle coordinate system by considering the whole vehicle height (H101) and ground clearance (H156) of the development vehicle, and determining coordinates of a pedal point according to the X-direction distance (L113) from the front wheel center to the pedal point of the platform key parameters.

The driver seat height (H30-1), i.e., the Z-direction height from the seat reference point (SgRP-1) to the heel point (AHP), is preliminarily determined.

S2, calculating an X-direction distance (L99-1) from a stepping point of a driver to a seat reference point, and determining an X coordinate of the reference point (SgRP-1) of the driver seat;

calculating a back angle (A40-1) of a driver seat to determine a trunk angle of the driver in a driving state;

the X-coordinate and Z-coordinate of the Steering Wheel Center (SWC) are calculated, and the grip area of the driver in the driving state can be preliminarily determined by determining the steering wheel diameter and the adjustment range by initial definition.

Further, the second step specifically includes the following steps:

based on Ramsis software, the gender, height, body size ratio and waist circumference of a target user are considered, and a 3D human body model of a driver is created, wherein the 3D human body model comprises 126 human body models of various human bodies in China.

Further, the third step specifically includes the following steps:

based on the pedal point, the heel point, the hand-held area of the steering wheel and the ceiling constraint 3D human body model determined in the concept design stage, simulating the actual driving working condition to calculate the human body driving posture for 126 times and extracting a corresponding seat reference point (SgRP-1);

fitting the 126 seat reference points (SgRP-1) representing various human bodies in China according to the steps to obtain a fitted straight line;

and respectively translating the fitted straight line upwards and downwards to ensure that the above 126 seat reference points are distributed between the two translated straight lines and are respectively connected with the upper and lower straight line end points, so as to obtain the driving seat stroke frame suitable for Chinese human bodies.

The invention has the following beneficial effects:

1. the invention creates a 126-type Chinese human body model based on Ramsis simulation software, and generates the driving posture of a human body and the seat reference point coordinates by simulating the actual driving condition.

2. Fitting the obtained 126 seat reference points to obtain a straight line, moving the straight line upwards and downwards for a certain distance respectively to enable all seat reference points (SgRP-1) to be contained between the two straight lines, and connecting the end points of the two straight lines respectively to create a driving seat stroke frame considering the physiological characteristics of the Chinese human body.

3. The seat travel setting method provided by the invention is more suitable for Chinese human body in vehicle development, and is beneficial to improving driving comfort and operation convenience.

Drawings

FIG. 1 is a flowchart of the entire method for setting the travel of the driver's seat suitable for the physiological characteristics of the human body in China according to the embodiment of the present invention;

FIG. 2 is a diagram of various human body model types in China created based on Ramsis simulation software.

Detailed Description

A method for setting the travel of an automobile driving seat suitable for the physiological characteristics of Chinese human bodies comprises the following steps:

step one, setting a Y coordinate, a wheel center coordinate and a driver foot point (BOF) coordinate of a driver seat reference point (SgRP-1) in a whole vehicle coordinate system by combining development vehicle market positioning and the existing platform resources;

step two, a human body model containing all stature categories in a target user group is created on the basis of Ramsis software by comprehensively analyzing the physiological characteristics of the Chinese human body;

and step three, building a whole vehicle driving environment model, constraining a human body according to the actual driving state, simulating and calculating driving postures of various stature types, generating a driver seat reference point (SgRP-1) coordinate according to a simulation result, fitting all generated seat reference points (SgRP-1), and establishing a seat stroke by taking a fitted straight line as a reference.

Further, the step one specifically includes the following processes:

s1, determining the width of the whole vehicle (W103) by considering the market positioning of the developed vehicle, and setting the Y coordinate of a driver seat reference point (SgRP-1) to be 20% of the width of the whole vehicle;

and (3) determining coordinates of front and rear wheel centers in a whole vehicle coordinate system by considering the whole vehicle height (H101) and ground clearance (H156) of the development vehicle, and determining coordinates of a pedal point according to the X-direction distance (L113) from the front wheel center to the pedal point of the platform key parameters.

The driver seat height (H30-1), i.e., the Z-direction height from the seat reference point (SgRP-1) to the heel point (AHP), is preliminarily determined.

S2, calculating the X-direction distance (L99-1) from the pedal point of the driver to a seat reference point, and determining the X coordinate of the reference point (SgRP-1) of the driver seat:

L99-1＝913.7+0.672316×(H30-1)-0.00195530×(H30-1)²

calculating the back angle (A40-1) of the driver seat to determine the torso angle of the driver in the driving state:

A40-1＝-0.024×H30+30±1.5°

the X-coordinate and Z-coordinate of the Steering Wheel Center (SWC) are calculated, and the grip area of the driver in the driving state can be preliminarily determined by determining the steering wheel diameter and the adjustment range by initial definition.

Steering wheel center X coordinate (SWCx) relative to kick point:

saloon car (200 < H30 < 300):

SWCx＝(-0.0029*(H30-1)2+0.9392*(H30-1)+500)±10

SUV(300＜H30＜400)：

SWCx＝(-0.0029*(H30-1)2+0.9392*(H30-1)+515)±10

steering wheel center Z coordinate (SWCz) relative to the seat reference point:

saloon car (200 < H30 < 300):

SWCz＝(-0.2674*(H30-1)+443.96)±10

SUV(300＜H30＜400)：

SWCz＝(-0.2674*(H30-1)+449)±10

further, the second step specifically includes the following steps:

based on Ramsis software, the gender, height, body size ratio and waist circumference of a target user are considered, and a 3D human body model of a driver is created, wherein the 3D human body model comprises 126 human body models of various human bodies in China.

Further, the third step specifically includes the following steps:

based on the pedal point, the heel point, the hand-held area of the steering wheel and the ceiling constraint 3D human body model determined in the concept design stage, simulating the actual driving working condition to calculate the human body driving posture for 126 times and extracting a corresponding seat reference point (SgRP-1);

fitting the 126 seat reference points (SgRP-1) representing various human bodies in China according to the steps to obtain a fitted straight line;

and respectively translating the fitted straight line upwards and downwards to ensure that the above 126 seat reference points are distributed between the two translated straight lines and are respectively connected with the upper and lower straight line end points, so as to obtain the driving seat stroke frame suitable for Chinese human bodies.

Examples

As shown in fig. 1, a method for setting the travel of a car driving seat suitable for the physiological characteristics of a Chinese human body mainly relates to the analysis of the characteristics of the Chinese human body, the creation of a human body model, the simulation calculation of a driving posture and the travel setting of the car driving seat, and comprises the following steps:

the full width (W103) is determined in view of developing vehicle market positioning, the Y coordinate of the driver seat reference point (SgRP-1) is usually set to be 20% of the full width, and the passenger compartment space and the part arrangement are referred to for fine adjustment.

And (3) determining coordinates of front and rear wheel centers in a whole vehicle coordinate system by considering the whole vehicle height (H101) and ground clearance (H156) of the development vehicle, and determining coordinates of a pedal point according to the X-direction distance (L113) from the front wheel center to the pedal point of the platform key parameters.

The height (H30-1) of a driver seat, namely the Z-direction height from a seat reference point (SgRP-1) to A Heel Point (AHP), is determined primarily by comprehensively considering factors such as market positioning of developed vehicles, existing platform resources and the like, and the height of a car seat is 240-260 mm and the height of an SUV seat is 310-350 mm generally.

Calculating the X-direction distance (L99-1) from the pedal point of the driver to a seat reference point, and determining the X coordinate of the reference point (SgRP-1) of the driver seat:

L99-1＝913.7+0.672316×(H30-1)-0.00195530×(H30-1)²

calculating the back angle (A40-1) of the driver seat to determine the torso angle of the driver in the driving state:

A40-1＝-0.024×H30+30±1.5°

the X-coordinate and Z-coordinate of the Steering Wheel Center (SWC) are calculated, and the grip area of the driver in the driving state can be preliminarily determined by determining the steering wheel diameter and the adjustment range by initial definition.

Steering wheel center X coordinate (SWCx) relative to kick point:

saloon car (200 < H30 < 300):

SWCx＝(-0.0029*(H30-1)2+0.9392*(H30-1)+500)±10

SUV(300＜H30＜400)：

SWCx＝(-0.0029*(H30-1)2+0.9392*(H30-1)+515)±10

steering wheel center Z coordinate (SWCz) relative to the seat reference point:

saloon car (200 < H30 < 300):

SWCz＝(-0.2674*(H30-1)+443.96)±10

SUV(300＜H30＜400)：

SWCz＝(-0.2674*(H30-1)+449)±10

dimensions such as sex, height, body size ratio (upper half body to lower half body ratio), waistline and the like of a target user are comprehensively considered on the basis of Ramsis software to create a driver 3D human body model, wherein 126 human body models including various human body models in China are created, and the figure 2 shows that the human body models include various human body models in China.

And (3) simulating the actual driving working condition to calculate the human driving posture for 126 times and extracting a corresponding seat reference point (SgRP-1) based on the pedal point, the heel point, the hand-held area of the steering wheel and the ceiling constraint 3D human body model determined in the concept design stage.

According to the 126 seat reference points (SgRP-1) which are obtained in the steps and represent various human bodies in China, fitting the reference points to obtain a straight line.

And respectively translating the fitted straight line upwards and downwards to ensure that the above 126 seat reference points are distributed between the two translated straight lines and are respectively connected with the upper and lower straight line end points, so as to obtain the driving seat stroke frame suitable for Chinese human bodies.