CN115659501A - Method and device for determining vehicle accessibility boundary - Google Patents

Abstract

The application provides a vehicle business turn over nature boundary determining method and device, obtain front row threshold boundary surface, front door opening seam allowance boundary surface, back row threshold boundary surface and back door opening seam allowance boundary surface, import moulding outer CAS data or point cloud data under the whole vehicle coordinate system, import door opening top region concept cross section, A post lower region concept cross section, B post upper portion and lower region concept cross section, C post region and concept cross section of threshold region in moulding door parting region, generate the initial three-dimensional door opening seam allowance boundary, and compare respectively; when the initial three-dimensional door opening seam allowance boundary is larger than the front-row threshold boundary surface, the front door opening seam allowance boundary surface, the rear-row threshold boundary surface and the rear door opening seam allowance boundary surface, determining that the molding door parting area conforms to the vehicle access boundary; otherwise, the vehicle accessibility boundary is not met. The method and the device have the advantages that through parametric design, the in-out boundary surface can be changed according to the change of the hard point parameters of the whole vehicle, and the in-out design check of different vehicle types on the same platform is realized.

Description

Method and device for determining vehicle accessibility boundary

Technical Field

The application relates to the technical field of vehicle development, in particular to a method and a device for determining vehicle accessibility boundaries.

Background

The vehicle entrance and exit performance refers to convenience of getting on and off by a driver and passengers. The convenience of automobile entering and exiting is an important content of automobile ergonomics, and the feeling of getting on and off the automobile by customers is directly influenced by the design of the convenience of automobile entering and exiting.

In the conceptual design stage of a new vehicle model, the bidding is decomposed and competitive product bidding is performed according to the index of convenience for getting on and off the vehicle, and the objective parameters of accessibility are formulated by performing statistical analysis on the competitive product bidding parameters. The design of the entrance and exit is related to the arrangement of hard points of a man-machine of the whole vehicle, the design of a door opening spigot, the inclination angle of the A column, the front and rear positions of the B column, the ground clearance of the top cover and the threshold, the positions of the steering wheel and the seat and other factors. The factors change due to the change of the shape and the posture of the whole vehicle and the change of the size of the vehicle grids of the whole vehicle, so that the design and the check of the business-trip boundary need to be repeatedly carried out. If the vehicle entrance and exit problem is found only through model evaluation in the later stage of modeling, the whole vehicle cost is increased, and the project development cycle is influenced.

Although a design method of a vehicle door opening stop edge is disclosed in prior art 1 (CN 108639190 a), specifically, introducing automobile modeling data and impact factor data into a CAD is disclosed; establishing a projection line sketch in the side view and making a projection of curve simulation X-Flansch; adjusting the projection to a first projection line according to the assembly requirement; importing glass surface offset data and a head space concept section, and manufacturing a first concept surface; introducing a concept section of getting-off convenience, and manufacturing a second concept surface according to the process requirement of X-Flansch and the glass bottom dead center; respectively introducing a hinge concept section and a foot passing space concept section of a A, B, C column to manufacture a third concept surface, and connecting the first concept surface, the second concept surface and the third concept surface to form a basic surface; the first projection line is projected onto the underlying surface, shifted according to the X-Flansch length and cut off to get the concept X-Flansch. However, the comparison document 1 cannot be changed according to the change of the hard spot parameters of the whole vehicle, and the business turn over design check of different vehicle types on the same platform cannot be realized.

Therefore, for the forward development of the vehicle type, how to determine the key hard points of the whole vehicle at the conceptual design stage and carry out the parameterized design of the vehicle accessibility boundary according to the key hard points of the human-machine, the repeated design is avoided, and the situation that the accessibility problem is found only at the later stage of modeling is avoided is very important.

Disclosure of Invention

In view of the above drawbacks of the prior art, the present application provides a method and an apparatus for determining a vehicle entrance/exit boundary to solve the above technical problems.

The application provides a vehicle accessibility boundary determination method, which comprises the following steps:

acquiring a front-row threshold boundary surface, a front door opening seam allowance boundary surface, a rear-row threshold boundary surface and a rear door opening seam allowance boundary surface;

establishing a whole vehicle coordinate system, introducing CAS (system as a template) data or point cloud data outside the model under the whole vehicle coordinate system, and introducing a concept section of a top area of the door opening, a concept section of a lower area of the A column, concept sections of upper and lower areas of the B column, and concept sections of a C column area and a threshold area in a parting area of the model door to generate an initial three-dimensional door opening seam allowance edge;

generating an initial three-dimensional door opening seam allowance boundary according to the initial three-dimensional door opening seam allowance edge, and respectively comparing the initial three-dimensional door opening seam allowance boundary with the acquired front-row threshold boundary surface, front door opening seam allowance boundary surface, rear-row threshold boundary surface and rear door opening seam allowance boundary surface;

when the initial three-dimensional door opening seam allowance boundary is larger than the acquired front-row threshold boundary surface, the front door opening seam allowance boundary surface, the rear-row threshold boundary surface and the rear door opening seam allowance boundary surface, determining that the molding door parting area conforms to a vehicle access boundary; otherwise, determining that the shaped door parting area does not accord with the vehicle access boundary, and adjusting the shaped door parting area or changing the concept section of the door opening.

In an embodiment of the present application, the process of obtaining the front threshold boundary surface and the front door opening seam allowance boundary surface includes:

determining the boundary of the depth dimension of the front row of the vehicle entering based on the reference point coordinate and the heel point coordinate of the driver seat and by combining the dimension of the whole vehicle in the width direction and the section of the threshold position; determining the ground clearance of the threshold by combining the ground line boundary of the whole vehicle, and generating a front-row threshold boundary surface; and the number of the first and second groups,

and determining a spigot boundary surface of the A column, an upper edge spigot boundary surface of a front door frame and a front edge spigot boundary surface of the B column based on the reference point coordinates of the driver seat to obtain the front door opening spigot boundary surface.

In an embodiment of the present application, the process of obtaining the boundary surface of the back-row threshold and the boundary surface of the back door opening seam allowance includes:

determining a rear-row threshold boundary surface according to a first distance position in front of an X coordinate of a rear-row R point; and the number of the first and second groups,

determining the upper edge boundary of the front edge of the front opening of the rear door according to the Z-direction height from the R point of the rear row to the front edge of the front door frame; and the number of the first and second groups,

and determining the front edge spigot boundary of the C column according to the minimum distance from the rear row R point height second distance position R point to the front end of the C column.

In an embodiment of the present application, the method further includes the steps of obtaining a front-row threshold boundary surface, a front door opening seam allowance boundary surface, a rear-row threshold boundary surface, and a rear door opening seam allowance boundary surface:

generating a finished automobile ground line boundary according to finished automobile tire model selection, finished automobile wheelbase parameters, and finished automobile axle load and wheel load parameters under different loads; and the number of the first and second groups,

according to the defined size of the finished automobile product and the body state requirement of the automobile, determining the reference point coordinate of a driver seat, the coordinate of a pedal point, the coordinate of a front row seat height, the coordinate of a rear row R point and the rear row seat height.

In an embodiment of the present application, the method further includes: determining a reference point X coordinate of the driver seat according to the coordinate of the pedal point and the front row seating height;

recording the distance from the driver seat reference point to the pedal point in the X direction as L99-1, then the calculation formula of L99-1 is as follows:

L99-1＝913.+0.672316X(H30-1)-0.00195530X(H30-1) ²

in the formula, H30-1 represents the front row sitting height.

In an embodiment of the present application, before determining that the front row of the vehicle enters the depth dimension boundary, the method further comprises:

generating a coordinate of a center point of a steering wheel according to the coordinate of the reference point of the driver seat and the coordinate of the pedal point;

the minimum distance (H74) from the steering wheel to the front seat is determined based on the steering wheel center point position and the steering wheel size, resulting in a front seat front boundary.

In an embodiment of the present application, when generating the center point coordinate of the steering wheel according to the reference point coordinate of the driver seat and the pedal point coordinate, the dimension of the center point of the steering wheel from the pedal point in the X direction is denoted as Wx, and the calculation formula of Wx is as follows:

Wx＝640.1–0.10325*(H30-1)–0.0005*(H30-1)2；

in the formula, H30-1 represents the front row sitting height.

In an embodiment of the present application, when generating the center point coordinate of the steering wheel according to the reference point coordinate of the driver seat and the pedal point coordinate, the dimension of the center point of the steering wheel from the heel point in the Z direction is denoted as Wz, and the calculation formula of Wz is as follows:

Wz＝405.17+0.8715*(H30-1)；

in the formula, H30-1 represents the front row sitting height.

In one embodiment of the present application, the front row entry depth of the vehicle is denoted as W18, and W18 is not less than 604-0.275 × h130; in the formula, H130 represents the sill height from the ground.

The present application further provides a vehicle ingress and egress boundary determining apparatus, the apparatus comprising:

the boundary data acquisition module is used for acquiring a front-row threshold boundary surface, a front door opening seam allowance boundary surface, a rear-row threshold boundary surface and a rear door opening seam allowance boundary surface;

the three-dimensional door opening seam allowance edge module is used for establishing a whole vehicle coordinate system, importing modeling external CAS data or point cloud data under the whole vehicle coordinate system, importing a door opening top region conceptual section, an A column lower region conceptual section, a B column upper region conceptual section and a B column lower region conceptual section, a C column region and a threshold region conceptual section in a modeling door parting region, and generating an initial three-dimensional door opening seam allowance edge;

the comparison module is used for generating an initial three-dimensional door opening seam allowance boundary according to the initial three-dimensional door opening seam allowance boundary and comparing the initial three-dimensional door opening seam allowance boundary with the acquired front-row threshold boundary surface, front door opening seam allowance boundary surface, rear-row threshold boundary surface and rear door opening seam allowance boundary surface respectively;

the boundary determining module is used for determining that the molding door parting area conforms to the vehicle access boundary when the initial three-dimensional door opening seam allowance boundary is larger than the acquired front-row threshold boundary surface, the front door opening seam allowance boundary surface, the rear-row threshold boundary surface and the rear door opening seam allowance boundary surface; otherwise, determining that the shaped door parting area does not accord with the vehicle access boundary, and adjusting the shaped door parting area or changing the concept section of the door opening.

As described above, the present application provides a method and an apparatus for determining a vehicle accessibility boundary, which have the following beneficial effects:

the method comprises the steps of firstly obtaining a front-row threshold boundary surface, a front door opening seam allowance boundary surface, a rear-row threshold boundary surface and a rear door opening seam allowance boundary surface, then establishing a whole vehicle coordinate system, introducing modeling external CAS data or point cloud data under the whole vehicle coordinate system, introducing a door opening top region conceptual section, an A column lower region conceptual section, a B column upper region conceptual section and a B column lower region conceptual section, a C column region and a threshold region conceptual section in a modeling door parting region, and generating an initial three-dimensional door opening seam allowance edge; generating an initial three-dimensional door opening seam allowance boundary according to the initial three-dimensional door opening seam allowance edge, and respectively comparing the initial three-dimensional door opening seam allowance boundary with the acquired front-row threshold boundary surface, front door opening seam allowance boundary surface, rear-row threshold boundary surface and rear door opening seam allowance boundary surface; when the initial three-dimensional door opening seam allowance boundary is larger than the acquired front-row threshold boundary surface, the front door opening seam allowance boundary surface, the rear-row threshold boundary surface and the rear door opening seam allowance boundary surface, determining that the molding door parting area conforms to a vehicle access boundary; otherwise, determining that the shaped door parting area does not accord with the vehicle access boundary, and adjusting the shaped door parting area or changing the concept section of the door opening. Therefore, the business turn-in and turn-out boundary surface can be changed according to the parameter change of the whole vehicle hard point through the parametric design, the business turn-in and turn-out design check of different vehicle types on the same platform is realized, the business turn-in and turn-out problem can be avoided in advance in the automobile concept design stage, and the working efficiency is improved. Simultaneously, this application combines door opening tang position section according to business turn over nature boundary, can judge the outer molding front and back door crack fast in the molding early stage, A post inclination, top cap height, whether B post position satisfies business turn over nature design requirement.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:

fig. 1 is a schematic flowchart of a vehicle ingress and egress boundary determination method according to an embodiment of the present application;

fig. 2 is a layout diagram of a whole vehicle coordinate system, a whole vehicle ground line, and a driver key hard point provided in an embodiment of the present application;

FIG. 3 is a front boundary view of a driver's seat according to an embodiment of the present application, which satisfies the human body ingress and egress boundary of a Chinese 95% compartmentalized male;

fig. 4 is a boundary diagram of a threshold for a 5% quantile female in china to get on and off the car according to an embodiment of the present application;

FIG. 5 illustrates a front and rear door opening seam allowance boundary surface meeting the access requirement provided by an embodiment of the present application;

FIG. 6 is a three-dimensional door opening seam allowance diagram produced by combining the conceptual cross-section of the door opening area and the door opening parting seam provided by an embodiment of the present application;

fig. 7 is a schematic hardware configuration diagram of a vehicle entrance/exit boundary determining apparatus according to an embodiment of the present application.

Detailed Description

Other advantages and effects of the present application will become apparent to those skilled in the art from the disclosure herein, wherein the embodiments of the present application will be described in detail with reference to the accompanying drawings and preferred embodiments. The present application is capable of other and different embodiments and its several details are capable of modifications and/or changes in various respects, all without departing from the spirit of the present application. It should be understood that the preferred embodiments are for purposes of illustration only and are not intended to limit the scope of the present disclosure.

It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present application, and the drawings only show the components related to the present application and are not drawn according to the number, shape and size of the components in actual implementation, the type, quantity and proportion of each component in actual implementation may be changed freely, and the layout of the components may be more complicated.

"and/or" in the present application describes an association relationship of associated objects, and indicates that three relationships may exist, for example, a and/or B, and may indicate: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.

The plural in the present application means two or more.

In the description of the present application, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, nor order.

In addition, in the embodiments of the present application, the word "exemplary" is used to mean serving as an example, instance, or illustration. Any embodiment or implementation described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments or implementations. Rather, the term using examples is intended to present concepts in a concrete fashion.

In the following description, numerous details are set forth to provide a more thorough explanation of the embodiments of the present application, however, it will be apparent to one skilled in the art that the embodiments of the present application may be practiced without these specific details, and in other embodiments, well-known structures and devices are shown in block diagram form rather than in detail in order to avoid obscuring the embodiments of the present application.

Fig. 1 shows a schematic flow chart of a vehicle ingress and egress boundary determination method provided in an embodiment of the present application. Specifically, in an exemplary embodiment, as shown in fig. 1, the present embodiment provides a vehicle ingress and egress boundary determination method, including the steps of:

step 1: determining a coordinate system of the whole vehicle, determining a ground line boundary and a key hard point: generating a finished automobile ground line boundary according to finished automobile tire model selection, finished automobile wheel base parameters and finished automobile axle load and wheel load parameters under different loads; determining a driver seat reference point SGRP-1 coordinate, a pedal point BOF point coordinate and a front row seating height H30-1 according to the defined size of the whole vehicle product and the body state requirement of the vehicle; the R point coordinate of the rear passenger and the rear seating height H30-2;

step 2: determining a front seat front edge boundary: generating a steering wheel center point SWC coordinate according to the driver seat reference point SGRP-1 coordinate and the pedal point BOF point coordinate in the step 1 and an empirical formula, determining a minimum distance H74 from a steering wheel to a front row seat according to the steering wheel center point position and the steering wheel size, and determining a front row seat front edge boundary. The seat can be accessed by 95 percent of male human bodies in China under the condition of not touching a steering wheel and a steering column.

And step 3: determining a front-row threshold boundary surface and a front door opening seam allowance boundary surface: determining a boundary of a front row entering depth W18 size according to the driver seat reference point SGRP-1 coordinate and the heel point AHP point coordinate in the step 1, the size of the whole vehicle in the width direction and the threshold position section, the getting-off scene of 5% female human bodies in China, the ground line of the whole vehicle determined in the step 1, the ground clearance H130 of the threshold, and further generating a threshold boundary surface.

And determining a spigot boundary surface of the A column, an upper edge spigot boundary surface of the front door frame and a front edge spigot boundary surface of the B column. And (3) making an A-column spigot boundary surface, a front door frame upper edge spigot boundary surface and a B-column front edge spigot boundary surface in a side view according to the driver seat reference point SGRP-1 determined in the step 1. Wherein the A column spigot boundary is determined according to the minimum distance H19 between the R point of the front row and the front door on a straight line which inclines forwards by 20 degrees in the vertical direction; the boundary surface of the front door frame upper edge seam allowance is determined according to the Z-direction height H11-1 from the front row R point to the front door frame upper edge seam allowance; the boundary surface of the front edge spigot of the B column is determined according to the minimum distance LRB-1 between the R point at the height of the R point in the front row and the front end of the B column.

And 4, step 4: and determining a rear-row threshold boundary surface and a rear door opening seam allowance boundary surface. Determining a rear-row threshold boundary surface according to the position 330mm in front of the X coordinate of the rear-row R point determined in the step 1, determining the upper edge boundary of the rear door opening seam allowance according to the Z-direction height H11-2 from the rear-row R point to the upper edge seam allowance edge of the rear door frame, and determining the front edge seam allowance boundary of the C column according to the minimum distance LRC-1 from the R point at the second distance position of the height of the rear-row R point to the front end of the C column. As an example, the second distance position in the present embodiment is 600mm.

And 5: introducing modeling external CAS data or point cloud data under a whole vehicle coordinate system, introducing a concept section of a door opening top area, a concept section of a column A lower area, concept sections of a column B upper area and a column B lower area, and concept sections of a column C area and a threshold area in a modeling door parting area, deriving a door opening seam allowance edge at a corresponding position according to the concept sections, referring to a modeling external CAS vehicle door parting curve, and connecting the seam allowance edges of all sections in a smooth manner by using a curved surface to manufacture a three-dimensional door opening seam allowance edge of a primary version.

Step 6: comparing the three-dimensional door opening seam allowance in the step 5 with the seam allowance boundaries determined according to the total arrangement hard points in the steps 3 and 4, if the door opening seam allowance boundaries of the 4 regions shown in the figure in the step 5 are all larger than the door opening seam allowance boundaries in the steps 3 and 4, the condition that the outward modeling door seam allowance region meets the business-out requirement is indicated, otherwise, the business-out requirement is not met, and the modeling door seam allowance position needs to be adjusted or the concept section of the door opening needs to be changed.

Therefore, the business turn-over boundary surface can be changed according to the change of the parameters of the hard points of the whole automobile through parametric design, and the business turn-over design check of different automobile types on the same platform is realized, so that the business turn-over problem can be avoided in advance in the automobile concept design stage, and the working efficiency is improved. Meanwhile, according to the embodiment, according to the in-out boundary, the door opening seam allowance position section is combined, whether the in-out design requirements are met by the front door seam, the rear door seam, the A column inclination angle, the top cover height and the B column position of the outer modeling can be quickly judged in the early stage of modeling.

In another exemplary embodiment, the embodiment further provides a vehicle ingress and egress boundary determination method, including the steps of:

step S1: and determining a whole vehicle coordinate system, a ground line boundary and key hard points in a concept design stage.

S1.1: ground line parametric design: calculating the coordinates of front and rear wheel center points and the static radius of the tire according to the axle load parameter and the suspension parameter of the whole vehicle; under a whole vehicle coordinate system, on a Y0 plane, according to coordinates of front and rear wheel center points and the static radius of the tire, making a tangent line of a front and rear wheel static radius curve, namely a ground line; and respectively making ground lines under no-load and one-person load. As shown in fig. 2.

S1.2: the sitting height H30-1 and the R points of the front row and the rear row are determined:

determining a front row seating height H30-1 according to a whole vehicle Z-direction size chain at the position of a front row R point by combining vehicle type positioning, a vehicle height target and a Z-direction head space target; according to the length size and the space target of the vehicle, the arrangement of the engine room and the position of the front wall plate and the arrangement of the pedal are combined to determine the L113 value, namely the position of the BOF point from the front wheel center X, as shown in FIG. 2.

According to the BOF point and the front row sitting height H30-1, determining the X coordinate of the front row R point by combining an empirical formula, wherein the calculation formula of the X-direction distance L99-1 between the front row R point and the BOF point is as follows:

L99-1＝913.+0.672316X(H30-1)-0.00195530X(H30-1) ² ；

and determining the Y coordinate of the R point of the front row according to the width dimension of the whole vehicle at the R point of the front row and a dimension chain in the width direction. And determining the X coordinate of the R point in the back row according to the distance L50-2 between the R points in the front row and the R point in the back row.

Step S2: generating a steering wheel center point SWC coordinate according to the driver seat reference point SGRP-1 coordinate and the pedal point BOF point coordinate in the step S1 and an empirical formula, wherein the distance from the steering wheel center point to the BOF point X along the dimension Wx according to the following empirical formula

Wx＝640.1–0.10325*(H30-1)–0.0005*(H30-1)2；

The Z-direction dimension Wz of the distance between the center point of the steering wheel and the heel point AHP is according to the following empirical formula:

Wz＝405.17+0.8715*(H30-1)；

and determining the position of a steering wheel according to the position of the center point of the steering wheel, the included angle between the axis of the steering wheel and the horizontal direction and the size of the steering wheel, further determining the minimum distance H74 from the steering wheel to the front row seat, and determining the front edge boundary of the front row seat, wherein H74 cannot be less than 150mm for all vehicles. The chair can be moved in and out of the chair under the condition that 95% of male human bodies in China do not touch a steering wheel and a steering column, as shown in figure 3.

And step S3: according to the driver seat reference point SGRP-1 coordinate and the heel point AHP point coordinate in the step S1, combining the width direction size of the whole vehicle and the cross section of the threshold position, simulating a 5% female human body getting-off scene in China in CATIA, determining the size boundary of the front row entering depth W18, combining the ground line of the whole vehicle determined in the step S1, determining the ground clearance H130 of the threshold, and further generating the threshold boundary surface, as shown in FIG. 4. Wherein H130 should not exceed 430mm and W18 should not exceed 525mm. When 300mm woven fabric (h130 woven fabric) is woven fabric (400mm), the front row entry depth (W18) and the sill height (H130) from the ground satisfy the following empirical formula:

W18≤604-0.275*H130；

according to the driver seat reference point SGRP-1 determined in step S1, an a-pillar spigot boundary surface, a front door frame upper edge spigot boundary surface, and a B-pillar front edge spigot boundary surface are made in the side view. Wherein the boundary of the A column seam allowance is determined according to the minimum distance H19 from the R point to the front door on the straight line of the R point of the front row which is inclined forwards by 20 degrees in the vertical direction, wherein the limit value H19 of the human body accessibility is more than or equal to 760mm; the boundary surface of the front door frame upper edge seam allowance is determined according to the Z-direction height H11-1 from the front row R point to the front door frame upper edge seam allowance; wherein H11-1 is determined according to the Z-direction size of the whole vehicle and the head space of the rear row, and H11-1 is recommended to be more than or equal to 760; the front boundary of the lower edge of the column A is determined by the distance LRA between the R point and the lower X direction of the column A at the height position of the R point, and the front edge spigot boundary surface of the column B is determined by the minimum distance LRB-1 between the R point at the height position of the R point of the front row and the front end of the column B, and the recommended LRB-1 is more than or equal to 10mm, as shown in figure 5.

And step S4: determining a rear-row threshold boundary surface according to the position 330mm in front of the X coordinate of the rear-row R point determined in the step S1, and determining the upper edge boundary of the front edge of the rear door opening according to the Z-direction height H11-2 from the rear-row R point to the upper edge of the front edge of the rear door frame, wherein H11-2 is determined according to the Z-direction size of the whole vehicle and the head space of the rear row, and H11-1 is recommended to be more than or equal to 750; and determining the front edge seam allowance boundary of the C column according to the minimum distance LRC between the height of the rear row of R points and the front end of the C column from the R points at the second distance position, as shown in figure 5. The distance LRC-1 from the point R of the second row to the upper end opening of the C column is not less than 250mm, and this dimension is 600mm above the point Z of R and is measured in the horizontal direction, as shown in FIG. 5.

Step S5: introducing external CAS data or point cloud data under a whole vehicle coordinate system, introducing conceptual sections of a door opening top area, an A column lower area, B column upper and lower area conceptual sections, a C column area and a threshold area in a molding door parting area, introducing conceptual sections of the A column lower area, the B column upper and lower area, the C column area and the threshold area, deriving door opening seam-stopping edges at corresponding positions according to the conceptual sections, referring to an external CAS door parting curve, and as shown in figure 6, connecting seam-stopping edges of all sections by using a curved surface in a smooth manner to manufacture a three-dimensional door opening seam-stopping edge of an original plate. The method comprises the following specific steps:

manufacturing an upper front door stop surface: extracting an outer CAS side wall contour guide line, determining a first flanging angle between a glass surface and a side surface according to a standard section of the upper section of the window frame, establishing association constraint between the standard section and the first flanging surface of the side wall and the glass, deviating the glass surface according to the distance between a section seam allowance and the glass, and taking the glass surface as an upper primary seam allowance surface.

Combining the CAS door parting seam, the LRA, the LRB-1 and the A column section, and manufacturing front and rear end seam surfaces of the front door on the B column section; combining CAS door parting, and manufacturing a preliminary front door lower part seam surface on the boundary of the threshold section; the preliminary seam allowance boundary surfaces of the upper part, the lower part, the front part and the rear part of the front door are connected through a bridging fairing, and the seam allowance boundary is determined according to the section of each area.

Step S6: comparing the preliminary three-dimensional door opening seam allowance in the step S5 with seam allowance boundaries which are determined according to the total arrangement hard points in the steps S3 and S4 and meet the access performance requirement, if the door opening seam allowance boundaries of 4 areas shown in the diagram in the step S5 are all in the door opening seam allowance boundaries in the steps S3 and S4, the door opening seam allowance boundaries deduced according to the external modeling door seam and the concept section meet the access performance requirement, otherwise, the door opening seam allowance area does not meet the access performance requirement, and the modeling door seam area needs to be adjusted or the concept section needs to be changed.

Therefore, in the design method provided by the embodiment, key hard points and access boundaries of the human-machine of the automobile are designed in a conceptual design stage, and access boundary parameters can be changed according to the change of the hard points of the whole automobile through CATIA (computer-graphics aided three-dimensional interactive application) parameterized design, so that the access boundary design of different automobile types on different platforms is realized. Meanwhile, according to the in-out boundary and by combining the door opening seam allowance position section, whether the in-out design requirements are met by the front and rear door parting of the outer model, the inclination angle of the column A, the height of the top cover and the position of the column B can be quickly judged in the early stage of the model. In the embodiment, the access boundary surface can be changed according to the change of the hard point parameters of the whole automobile through parametric design, and access design check of different automobile types on the same platform is realized, so that the access problem can be avoided in advance in the automobile concept design stage, and the working efficiency is improved.

In another exemplary embodiment of the present application, there is also provided a vehicle ingress and egress boundary determination method including the steps of:

and S100, acquiring a front-row threshold boundary surface, a front door opening seam allowance boundary surface, a rear-row threshold boundary surface and a rear door opening seam allowance boundary surface. As an example, the process of acquiring the front-row threshold boundary surface and the front door opening seam allowance boundary surface includes: determining a boundary of a depth W18 size of front row entering of the vehicle based on a driver seat reference point SGRP-1 coordinate and a heel point AHP coordinate and by combining the width direction size of the whole vehicle and a threshold position section; determining the ground clearance H130 of the threshold by combining the ground line boundary of the whole vehicle, and generating a front-row threshold boundary surface; and determining a column A spigot boundary surface, a front door frame upper edge spigot boundary surface and a column B front edge spigot boundary surface based on the driver seat reference point SGRP-1 coordinate to obtain the front door opening spigot boundary surface. As another example, the process of obtaining the rear row rocker boundary surface and the rear door opening seam allowance boundary surface includes: determining a rear-row threshold boundary surface according to a first distance position in front of an X coordinate of a rear-row R point; determining the upper edge boundary of the front edge of the front door opening according to the Z-direction height H11-2 from the point R of the rear row to the upper edge of the front door frame; and determining the front edge spigot boundary of the C column according to the minimum distance LRC-1 between the rear row R point height second distance position R point and the front end of the C column. Further, the present embodiment may note the vehicle front row entry depth as W18, and then W18 needs to satisfy: w18 is not less than 604-0.275 H130; in the formula, H130 represents the sill height from the ground. In this embodiment, the first distance is 330mm, and the second distance is 600mm.

S200, establishing a whole vehicle coordinate system, introducing modeling external CAS data or point cloud data under the whole vehicle coordinate system, and introducing a concept cross section of a door opening top area, a concept cross section of a column A lower area, concept cross sections of a column B upper area and a column B lower area, and concept cross sections of a column C area and a threshold area in a modeling door parting area to generate an initial three-dimensional door opening stop edge;

s300, generating an initial three-dimensional door opening seam allowance boundary according to the initial three-dimensional door opening seam allowance boundary, and comparing the initial three-dimensional door opening seam allowance boundary with the acquired front-row threshold boundary surface, front door opening seam allowance boundary surface, rear-row threshold boundary surface and rear door opening seam allowance boundary surface respectively;

s400, when the initial three-dimensional door opening seam allowance boundary is larger than the acquired front-row threshold boundary surface, the acquired rear-row threshold boundary surface and the acquired rear door opening seam allowance boundary surface, determining that the molding door parting area conforms to a vehicle access boundary; otherwise, determining that the shaped door parting area does not accord with the vehicle access boundary, and adjusting the shaped door parting area or changing the concept section of the door opening.

Therefore, the business turn-over boundary surface can be changed according to the change of the parameters of the hard points of the whole automobile through parametric design, and the business turn-over design check of different automobile types on the same platform is realized, so that the business turn-over problem can be avoided in advance in the automobile concept design stage, and the working efficiency is improved. Meanwhile, according to the embodiment, according to the in-out boundary, the door opening seam allowance position section is combined, whether the in-out design requirements are met by the front door seam, the rear door seam, the A column inclination angle, the top cover height and the B column position of the outer modeling can be quickly judged in the early stage of modeling.

According to the above description, in an exemplary embodiment, acquiring the front-row threshold boundary surface, the front door opening seam allowance boundary surface, the rear-row threshold boundary surface, and the rear door opening seam allowance boundary surface may further include: generating a finished automobile ground line boundary according to finished automobile tire model selection, finished automobile wheelbase parameters, and finished automobile axle load and wheel load parameters under different loads; and determining the SGRP-1 coordinate of the reference point of the driver seat, the BOF coordinate of the pedal point, the front row seating height H30-1, the rear row R coordinate and the rear row seating height H30-2 according to the defined size of the finished automobile product and the body state requirement of the automobile. The embodiment may further include: determining the X coordinate of the front row R point according to the BOF coordinate of the pedal point and the front row sitting height H30-1; recording the distance from the driver seat reference point to the pedal point in the X direction as L99-1, then the calculation formula of L99-1 is as follows:

L99-1＝913.+0.672316X(H30-1)-0.00195530X(H30-1) ² ；

in the formula, H30-1 represents the front row sitting height.

According to the above description, in an exemplary embodiment, before determining the front row entry depth W18 size boundary, the method may further include: generating a steering wheel center point SWC coordinate according to the driver seat reference point SGRP-1 coordinate and the pedal point BOF coordinate; the minimum distance H74 from the steering wheel to the front seat is determined based on the position of the center point of the steering wheel and the size of the steering wheel, and the front edge boundary of the front seat is obtained. As an example, in the present embodiment, when the coordinate of the center point SWC of the steering wheel is generated according to the coordinate of the driver seat reference point SGRP-1 and the coordinate of the kick point BOF, the dimension of the center point of the steering wheel from the kick point in the X direction is denoted as Wx, and the calculation formula of Wx is as follows: wx =640.1-0.10325 (H30-1) -0.0005 (H30-1) 2; in the formula, H30-1 represents the front row sitting height. As another example, in the present embodiment, when the steering wheel center point SWC coordinate is generated based on the driver seat reference point SGRP-1 coordinate and the foot point BOF coordinate, the dimension of the steering wheel center point from the heel point in the Z direction is denoted as Wz, and the calculation formula of Wz is: wz =405.17+0.8715 (H30-1); in the formula, H30-1 represents the front row sitting height.

In summary, the present application provides a vehicle ingress and egress boundary determining method, which includes acquiring a front-row threshold boundary surface, a front door opening seam allowance boundary surface, a rear-row threshold boundary surface and a rear door opening seam allowance boundary surface, then establishing a whole vehicle coordinate system, introducing modeling external CAS data or point cloud data under the whole vehicle coordinate system, and introducing a door opening top region concept section, an a-pillar lower region concept section, a B-pillar upper and lower region concept section, a C-pillar region and a threshold region concept section in a modeling door parting region, and generating an initial three-dimensional door opening seam allowance edge; generating an initial three-dimensional door opening seam allowance boundary according to the initial three-dimensional door opening seam allowance edge, and respectively comparing the initial three-dimensional door opening seam allowance boundary with the acquired front-row threshold boundary surface, front door opening seam allowance boundary surface, rear-row threshold boundary surface and rear door opening seam allowance boundary surface; when the initial three-dimensional door opening seam allowance boundary is larger than the acquired front-row threshold boundary surface, the front door opening seam allowance boundary surface, the rear-row threshold boundary surface and the rear door opening seam allowance boundary surface, determining that the molding door parting area conforms to a vehicle access boundary; otherwise, determining that the molding door parting area does not accord with the vehicle access boundary, and adjusting the molding door parting area or changing the concept section of the door opening. Therefore, the method has the advantages that through parametric design, the access boundary surface can be changed according to the change of the parameters of the hard points of the whole automobile, and the access design check of different automobile types on the same platform is realized, so that the access problem can be avoided in advance in the automobile concept design stage, and the working efficiency is improved. Meanwhile, according to the in-out boundary, the method is combined with the section of the door opening seam allowance position, and whether the seam of the front door and the rear door of the outer model, the inclination angle of the column A, the height of the top cover and the position of the column B meet the in-out design requirement or not can be quickly judged in the early stage of the model.

As shown in fig. 7, in an exemplary embodiment of the present application, there is also provided a vehicle accessibility boundary determining apparatus, including:

the boundary data acquisition module 710 is used for acquiring a front-row threshold boundary surface, a front door opening seam allowance boundary surface, a rear-row threshold boundary surface and a rear door opening seam allowance boundary surface;

the three-dimensional door opening seam allowance edge module 720 is used for establishing a whole vehicle coordinate system, importing modeling external CAS data or point cloud data under the whole vehicle coordinate system, importing a door opening top area concept cross section, an A column lower area concept cross section, a B column upper and lower area concept cross section, a C column area and a threshold area concept cross section in a modeling door parting area, and generating an initial three-dimensional door opening seam allowance edge;

a comparison module 730, configured to generate an initial three-dimensional door opening seam allowance boundary according to the initial three-dimensional door opening seam allowance boundary, and compare the initial three-dimensional door opening seam allowance boundary with the acquired front-row threshold boundary surface, front-row door opening seam allowance boundary surface, rear-row threshold boundary surface, and rear-row door opening seam allowance boundary surface;

a boundary determining module 740, configured to determine that the shaped door parting area conforms to a vehicle ingress and egress boundary when the initial three-dimensional door opening seam allowance boundary is greater than the obtained front-row threshold boundary surface, front door opening seam allowance boundary surface, rear-row threshold boundary surface, and rear door opening seam allowance boundary surface; otherwise, determining that the shaped door parting area does not accord with the vehicle access boundary, and adjusting the shaped door parting area or changing the concept section of the door opening.

The embodiment provides a vehicle in-out boundary determining device, which comprises a front-row threshold boundary surface, a front door opening seam allowance boundary surface, a rear-row threshold boundary surface and a rear door opening seam allowance boundary surface, a whole vehicle coordinate system is established, modeling external CAS data or point cloud data is introduced under the whole vehicle coordinate system, a door opening top region concept section, an A column lower region concept section, a B column upper and lower region concept section, a C column region and a threshold region concept section are introduced in a modeling door parting region, and an initial three-dimensional door opening seam allowance edge is generated; generating an initial three-dimensional door opening seam allowance boundary according to the initial three-dimensional door opening seam allowance edge, and respectively comparing the initial three-dimensional door opening seam allowance boundary with the acquired front-row threshold boundary surface, front door opening seam allowance boundary surface, rear-row threshold boundary surface and rear door opening seam allowance boundary surface; when the initial three-dimensional door opening seam allowance boundary is larger than the acquired front-row threshold boundary surface, the front door opening seam allowance boundary surface, the rear-row threshold boundary surface and the rear door opening seam allowance boundary surface, determining that the molding door parting area conforms to a vehicle access boundary; otherwise, determining that the shaped door parting area does not accord with the vehicle access boundary, and adjusting the shaped door parting area or changing the concept section of the door opening. Therefore, the device is designed in a parameterization mode, the in-out boundary surface can be changed according to the change of the parameters of the hard points of the whole automobile, the in-out design check of different automobile types on the same platform is achieved, the in-out problem can be avoided in advance in the automobile concept design stage, and the working efficiency is improved. Meanwhile, the device can rapidly judge whether the front and rear door parting of the outer modeling, the inclination angle of the A column, the height of the top cover and the position of the B column meet the design requirements of the access performance or not at the early stage of the modeling by combining the position section of the door opening seam allowance according to the access performance boundary.

It should be noted that the vehicle accessibility boundary determining apparatus provided in the foregoing embodiment and the vehicle accessibility boundary determining method provided in the foregoing embodiment belong to the same concept, wherein specific ways in which the respective modules and units perform operations have been described in detail in the method embodiment, and are not described herein again. In practical applications, the vehicle entrance/exit boundary determining apparatus provided in the above embodiment may distribute the above functions to different functional modules according to needs, that is, divide the internal structure of the apparatus into different functional modules to complete all or part of the above described functions, which is not limited herein.

The above-described embodiments are merely illustrative of the principles and utilities of the present application and are not intended to limit the application. Any person skilled in the art can modify or change the above-described embodiments without departing from the spirit and scope of the present application. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical concepts disclosed in the present application shall be covered by the claims of the present application.

Claims (10)

1. A vehicle accessibility boundary determination method, the method comprising the steps of:

acquiring a front-row threshold boundary surface, a front door opening seam allowance boundary surface, a rear-row threshold boundary surface and a rear door opening seam allowance boundary surface;

establishing a whole vehicle coordinate system, introducing CAS (system as a template) data or point cloud data outside the model under the whole vehicle coordinate system, and introducing a concept section of a top area of the door opening, a concept section of a lower area of the A column, concept sections of upper and lower areas of the B column, and concept sections of a C column area and a threshold area in a parting area of the model door to generate an initial three-dimensional door opening seam allowance edge;

generating an initial three-dimensional door opening seam allowance boundary according to the initial three-dimensional door opening seam allowance edge, and respectively comparing the initial three-dimensional door opening seam allowance boundary with the acquired front-row threshold boundary surface, front door opening seam allowance boundary surface, rear-row threshold boundary surface and rear door opening seam allowance boundary surface;

when the initial three-dimensional door opening seam allowance boundary is larger than the obtained front-row threshold boundary surface, the front-row door opening seam allowance boundary surface, the rear-row threshold boundary surface and the rear door opening seam allowance boundary surface, determining that the molding door parting area conforms to a vehicle access boundary; otherwise, determining that the shaped door parting area does not accord with the vehicle access boundary, and adjusting the shaped door parting area or changing the concept section of the door opening.

2. The vehicle accessibility boundary determination method according to claim 1, wherein acquiring a front row sill boundary surface and a front door opening seam boundary surface comprises:

determining the boundary of the depth dimension of the front row of the vehicle entering based on the reference point coordinate and the heel point coordinate of the driver seat and by combining the dimension of the whole vehicle in the width direction and the section of the threshold position; determining the ground clearance of the threshold by combining the ground line boundary of the whole vehicle, and generating a front-row threshold boundary surface; and (c) a second step of,

and determining a spigot boundary surface of the A column, an upper edge spigot boundary surface of a front door frame and a front edge spigot boundary surface of the B column based on the reference point coordinates of the driver seat to obtain the front door opening spigot boundary surface.

3. The vehicle accessibility boundary determination method of claim 2, wherein obtaining a rear row sill boundary surface and a rear door opening seam boundary surface comprises:

determining a rear-row threshold boundary surface according to a first distance position in front of an X coordinate of a rear-row R point; and the number of the first and second groups,

determining the upper edge boundary of the front edge of the front opening of the rear door according to the Z-direction height from the R point of the rear row to the front edge of the front door frame; and (c) a second step of,

and determining the front edge spigot boundary of the C column according to the minimum distance from the rear row R point height second distance position R point to the front end of the C column.

4. The vehicle accessibility boundary determination method according to any one of claims 1 to 3, wherein a front row rocker boundary surface, a front door opening seam allowance boundary surface, a rear row rocker boundary surface, and a rear door opening seam allowance boundary surface are obtained, the method further comprising:

generating a finished automobile ground line boundary according to finished automobile tire model selection, finished automobile wheelbase parameters, and finished automobile axle load and wheel load parameters under different loads; and (c) a second step of,

according to the defined size of the finished automobile product and the body state requirement of the automobile, determining the reference point coordinate of a driver seat, the coordinate of a pedal point, the coordinate of a front row seat height, the coordinate of a rear row R point and the rear row seat height.

5. The vehicle accessibility boundary determination method of claim 4, further comprising: determining a reference point X coordinate of the driver seat according to the coordinates of the pedal point and the front row seating height;

recording the distance from the reference point of the driver seat to the X direction of the pedal point as L99-1, and then calculating the L99-1 according to the formula:

L99-1＝913.+0.672316X(H30-1)-0.00195530X(H30-1) ² ；

in the formula, H30-1 represents the front row sitting height.

6. The vehicle accessibility boundary determination method of claim 2, wherein prior to determining a vehicle front row entry depth dimension boundary, the method further comprises:

generating a coordinate of a center point of a steering wheel according to the coordinate of the reference point of the driver seat and the coordinate of the pedal point;

and determining the minimum distance from the steering wheel to the front row of seats based on the position of the center point of the steering wheel and the size of the steering wheel, and obtaining the front edge boundary of the front row of seats.

7. The vehicle ingress/egress boundary determining method according to claim 6, wherein when generating the steering wheel center point coordinate from the driver seat reference point coordinate and the pedal point coordinate, a dimension of the steering wheel center point from the pedal point in the X direction is denoted as Wx, and the calculation formula of Wx is:

Wx＝640.1–0.10325*(H30-1)–0.0005*(H30-1)2；

in the formula, H30-1 represents the front row sitting height.

8. The vehicle ingress/egress boundary determining method according to claim 6 or 7, wherein when generating the steering wheel center point coordinate from the driver seat reference point coordinate and the pedal point coordinate, a dimension Z-wise from the steering wheel center point to the heel point is denoted as Wz, and the calculation formula of Wz is:

Wz＝405.17+0.8715*(H30-1)；

in the formula, H30-1 represents the front row sitting height.

9. The vehicle ingress and egress boundary determination method according to claim 2, wherein the vehicle foreline ingress depth is denoted as W18, and W18 ≦ 604-0.275 × h130; in the formula, H130 represents the sill height from the ground.

10. A vehicle ingress/egress boundary determining apparatus, comprising:

the boundary data acquisition module is used for acquiring a front-row threshold boundary surface, a front door opening seam allowance boundary surface, a rear-row threshold boundary surface and a rear door opening seam allowance boundary surface;

the three-dimensional door opening stop edge module is used for establishing a whole vehicle coordinate system, importing modeling external CAS data or point cloud data under the whole vehicle coordinate system, importing a door opening top region concept section, an A column lower region concept section, a B column upper region and lower region concept section, a C column region and a threshold region concept section in a modeling door parting region, and generating an initial three-dimensional door opening stop edge;

the comparison module is used for generating an initial three-dimensional door opening seam allowance boundary according to the initial three-dimensional door opening seam allowance boundary and comparing the initial three-dimensional door opening seam allowance boundary with the acquired front-row threshold boundary surface, front door opening seam allowance boundary surface, rear-row threshold boundary surface and rear door opening seam allowance boundary surface respectively;

the boundary determining module is used for determining that the molding door parting area conforms to the vehicle access boundary when the initial three-dimensional door opening seam allowance boundary is larger than the acquired front-row threshold boundary surface, the front door opening seam allowance boundary surface, the rear-row threshold boundary surface and the rear door opening seam allowance boundary surface; otherwise, determining that the shaped door parting area does not accord with the vehicle access boundary, and adjusting the shaped door parting area or changing the concept section of the door opening.

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