CN102848978B - Car back-view check method based on CATIA (computer-graphics aided three-dimensional interactive application) - Google Patents
Car back-view check method based on CATIA (computer-graphics aided three-dimensional interactive application) Download PDFInfo
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Abstract
The invention proposes a car back-view check method based on a CATIA (computer-graphics aided three-dimensional interactive application). The car back-view check method comprises the following steps of: constructing a standard check module structure tree; constructing a car environment model; generating view ranges of regulatory requirements; constructing an obstacle model; projecting the obstacle model on a mirror surface of the car environment model, and adjusting a mirror surface drive parameter until the back-view check result meets the regulatory requirements. According to the car back-view check method, car back-view check efficiency under different regulatory requirements is improved.
Description
Technical field
The present invention relates to automobile design field, be specifically related to a kind of automobile back view check method.
Background technology
The safety traffic of automobile, has important relationship with number and the speed of chaufeur acquired information correctness, information acquisition device.In the process of moving, the acquisition of information 80% is to rely on vision to automobile, guarantees that chaufeur has the necessary condition that the good visual field is preventing car accident.The rearward vision that chaufeur obtains in back mirror is occupied very important position in automotive safety, and corresponding regulation or standard have all been worked out in every country and area, guarantees the rearward vision that automobile is good.But, for car manufactures, especially, in the time of car exportation, in order to meet the various regulations in every country, area, must check dissimilar automobile back view, this makes automobile back view check work capacity large, and efficiency is low.
Summary of the invention
The object of the present invention is to provide a kind of automobile back view check method, improve the efficiency of carrying out rearward vision check for the regulation in different automobile types, country variant and area.
For achieving the above object, the invention provides following technical scheme:
An automobile back view check method based on CATIA, the step comprising has:
Criterion is checked modular construction tree;
Build automotive environment model;
Generate laws and regulations requirement field range;
Build obstacle model;
By described obstacle model projection to the minute surface of described automotive environment model;
Adjust minute surface and drive parameter, until the requirement of rearward vision check result satisfy regulatory.
Selectively, by described obstacle model projection on the minute surface of described automotive environment model, the above-ground route of infinite point is projected on the minute surface of described automotive environment model.
Selectively, described standard check module tree comprises: automotive environment parameter set, regulation parameter set.
Selectively, described automotive environment parameter set comprises: minute surface moulding parameter, R point parameter, overall width line parameter, ground parameter, curvature mirror parameter and minute surface drive parameter.
Selectively, described obstacle model is triangle.
Selectively, described leg-of-mutton height >=1035mm.
Selectively, the criterion that described rearward vision check result satisfy regulatory requires is: projection and the described minute surface of the height limit of described obstacle model on the minute surface of described automotive environment model is less than 1/5 of minute surface width near the distance at the edge of body side.
Utilize the module tree construction of CATIA, can modify to every design parameters easily, and be automatically associated with check result, needn't carry out a large amount of repetition modelings.
Further, adopt triangle as obstacle, under the condition that ensures to check precision, make rearward vision check simple.Adopt the triangle of height >=1035mm can meet general rearward vision requirement.
The projection of the height limit that adopts obstacle model on the minute surface of automotive environment model and minute surface near the distance at the edge of body side be less than minute surface width 1/5 as criterion, the visual determination that meets general chaufeur is accustomed to.
Brief description of the drawings
Next in connection with accompanying drawing, embodiments of the invention are described in further detail, wherein:
Fig. 1 is the automobile back view schematic diagram of Chinese law and regulations requirement;
The automobile back view schematic diagram of Tu2Shi European Union laws and regulations requirement;
Fig. 3 is the automotive environment model that adopts CATIA to set up;
Fig. 4 is the rearward vision scope schematic diagram that the model in Fig. 3 meets European Union's laws and regulations requirement;
Fig. 5 is minute surface driving model schematic diagram;
Fig. 6 is that the obstacle model projection in Fig. 4 arrives the schematic diagram after left outside rear-vision mirror face.
Detailed description of the invention
In conjunction with Fig. 1 and Fig. 2, two figure show respectively GB15084 to M1, N1 type automobile and the ECER46 of European Union the laws and regulations requirement rearward vision scope to III class automobile outer rear-view mirror (i.e. shade scope in figure).Visible, country variant and regional regulation are different to the rearward vision area requirement of different automobile types.In ensuing exemplary is described, the rearward vision that the European Union's standard according in Fig. 2 is carried out outside rear-view mirror by embodiments of the invention is checked, but those of ordinary skill in the art can understand, the rearward vision check method in the present invention is equally applicable to other countries and regions and checks for the laws and regulations requirement rearward vision of other vehicle.
First, set up a standard and check modular construction tree in CATIA software, structure tree comprises automotive environment parameter set, regulation parameter set etc.CATIA modular construction tree is designer's providing convenience property of amendment.
Next,, by input automotive environment parameter in automotive environment parameter set, build automotive environment model.In rearward vision check process, need the automotive environment parameter of input to comprise: minute surface moulding parameter, spheric curvature parameter, R point parameter, overall width line parameter, ground parameter.In the regulations such as European Union's regulation and GB15084, also the rearward vision scope of inside rear-view mirror is specified, therefore, for inside rear-view mirror is carried out to rearward vision check, can in automotive environment parameter, increase other parameter, the rearward vision of basic step and outside rear-view mirror is checked similar, and therefore the rearward vision of inside rear-view mirror is checked and is no longer described in detail in the present embodiment.After having inputted, generate the automotive environment model of locating as shown in Figure 3.In this model, the mirror shape of automobile outer rear-view mirror, curvature mirror, R point, vehicle width, ground scope have obtained determining, and the automatically generation associated with R point of the eyespot of chaufeur.In the time that needs change vehicle, only need adjust and can obtain rapidly new automotive environment model these parameters.
Then, for the required satisfied laws and regulations requirement of the vehicle in Fig. 3, check in the regulation parameter set in modular construction tree and select corresponding regulation in standard, generated laws and regulations requirement rearward vision scope as shown in Figure 4.Easily find out, rearward vision scope shown in Fig. 4 is the laws and regulations requirement that meets Fig. 2.Equally, for different regulations, amendment regulation parameter can generate new laws and regulations requirement rearward vision scope.
In Fig. 4, show constructed obstacle model simultaneously.This obstacle model is a pair of little triangle and a pair of large triangle, lays respectively at the 4m place, distance eyespot rear shown in Fig. 2 and is positioned at 20m place, eyespot rear.Little leg-of-mutton width L
1represent the 4mChu visual field, eyespot rear width, large leg-of-mutton width L
2represent the 20mChu visual field, eyespot rear width.L
1, L
2minimum value should satisfy regulatory requirement.Little triangle and large leg-of-mutton height h represent the height of visual thing within the scope of automobile back view, preferably h >=1035mm, and certainly, different car manufactures can select different h values to check for rearward vision as required.Those of ordinary skill in the art can imagine, obstacle model can also have other shapes such as such as rectangle, but shape is more complicated, and design effort amount is larger, and in projection step subsequently, also larger to the shape need of back mirror.
Then, according to convex lens imaging principle, utilize the sketch constraint of CATIA, obstacle model projection, to the minute surface of automotive environment model, is obtained to the mirror surface projection going out as shown in Figure 6.Shown in Fig. 6 is the projection of obstacle model in left outside back mirror, and the projection of right outside back mirror similarly.In the time that the projection of obstacle model is all in minute surface (in Fig. 6, large triangle, little leg-of-mutton projection are all in minute surface), think that the rearward vision check result of this vehicle is that satisfy regulatory requires, for this vehicle, selected mirror surface of external rearview mirror shape, curvature mirror, outside rear-view mirror installation site meet the demands.Obviously, if the projection on the limit at the height h place of obstacle model is too away from the minute surface edge of back mirror, the rearward vision scope that means chaufeur is wide, can affect on the contrary the attention of chaufeur to the visible within the scope of rearward vision, therefore preferably the projection of this height limit in minute surface and minute surface near the distance W at the edge of body side (being the right side in Fig. 6)
1be less than minute surface width W
21/5.In addition, in order to obtain good rearward vision subjective feeling, general chaufeur wishes to see by back mirror the above-ground route of infinite point, therefore needs the above-ground route of infinite point also to project on minute surface, judges whether projection is positioned at minute surface.The above-ground route method of projection of infinite point is: to move to the definite plane of the overall width line of the minute surface centre of sphere and eyespot as benchmark, make sketch, by picture point, (picture point of infinite point object point overlaps with focus reflected ray, focus is positioned at 1/2 place of the radius of curvature R of minute surface), reflected ray and minute surface focus are required point, then taking 20m, the projection line of above-ground route on minute surface is as direction generation straight line at a distance, and this straight line should be in minute surface.
But the satisfy regulatory requirement just of the automotive environment model of Primary Construction, now needs minute surface to drive parameter to adjust.As shown in Figure 5, minute surface drives the adjustment of parameter can make minute surface around X-axis, Y-axis, Z axis rotation, or carry out translation, corresponding the changing of obstacle, the above-ground route projected position on minute surface, until obstacle model, the projection of above-ground route in minute surface meet the requirement in Fig. 6, check complete.
Although the present invention is described in conjunction with above embodiment, but the present invention is not limited to above-described embodiment, and being only subject to the restriction of claim, those of ordinary skill in the art can easily modify to it and change, but do not leave essence design of the present invention and scope.
Claims (7)
1. the automobile back view check method based on CATIA, the step comprising has:
Criterion is checked modular construction tree;
Build automotive environment model;
Generate laws and regulations requirement field range;
Build obstacle model;
By described obstacle model projection to the minute surface of described automotive environment model;
Adjust minute surface and drive parameter, until the requirement of rearward vision check result satisfy regulatory.
2. the automobile back view check method based on CATIA according to claim 1, it is characterized in that, by described obstacle model projection on the minute surface of described automotive environment model, the above-ground route of infinite point is projected on the minute surface of described automotive environment model.
3. the automobile back view check method based on CATIA according to claim 1, is characterized in that, described standard is checked module tree and comprised: automotive environment parameter set, regulation parameter set.
4. the automobile back view check method based on CATIA according to claim 3, it is characterized in that, described automotive environment parameter set comprises: minute surface moulding parameter, R point parameter, overall width line parameter, ground parameter, curvature mirror parameter and minute surface drive parameter.
5. the automobile back view check method based on CATIA according to claim 1, is characterized in that, described obstacle model is triangle.
6. the automobile back view check method based on CATIA according to claim 5, is characterized in that described triangle height >=1035mm.
7. the automobile back view check method based on CATIA according to claim 1, it is characterized in that, the criterion that described rearward vision check result satisfy regulatory requires is: projection and the described minute surface of the height limit of described obstacle model on the minute surface of described automotive environment model is less than 1/5 of minute surface width near the distance at the edge of body side.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106250630A (en) * | 2016-08-03 | 2016-12-21 | 北京长安汽车工程技术研究有限责任公司 | The visual field regulation check method of the outside rear-view mirror of a kind of automobile and system |
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| CN104709175B (en) * | 2013-12-13 | 2017-01-04 | 北汽福田汽车股份有限公司 | A kind of method setting up mirror field of view border |
| CN105676449B (en) * | 2016-01-07 | 2018-03-02 | 北京长城华冠汽车科技股份有限公司 | Outside rear-view mirror view verification method and device |
| CN106080399A (en) * | 2016-06-16 | 2016-11-09 | 北京长城华冠汽车科技股份有限公司 | The interior rearward vision check method of vehicle |
| CN107298052B (en) * | 2017-06-21 | 2020-05-29 | 安徽江淮汽车集团股份有限公司 | Vehicle exterior mirror shielding range calculation method |
| CN107300475B (en) * | 2017-08-11 | 2019-06-25 | 西华大学 | A kind of automobile ergonomics view verification system |
| CN108959809A (en) * | 2018-07-24 | 2018-12-07 | 湖南龙创汽车技术有限公司 | Inside-automobile rear mirror view verification method |
| CN109271750A (en) * | 2018-11-15 | 2019-01-25 | 江铃汽车股份有限公司 | A kind of evaluation method of automobile rearview mirror area of visual field |
| CN111223144A (en) * | 2019-11-19 | 2020-06-02 | 北京长城华冠汽车科技股份有限公司 | Occlusion correction method and device for rearview mirror, computing equipment and storage medium |
| CN110991058A (en) * | 2019-12-03 | 2020-04-10 | 上海元城汽车技术有限公司 | Equipment dazzling checking method and device |
| CN114274874A (en) * | 2021-12-30 | 2022-04-05 | 重庆长安汽车股份有限公司 | Method for checking indirect view of automobile |
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Address after: Hefei City, Anhui Province, 230022 East Road No. 176 Patentee after: Anhui Jianghuai Automobile Group Limited by Share Ltd Address before: Hefei City, Anhui Province, 230022 East Road No. 176 Patentee before: Anhui Jianghuai Automobile Co., Ltd. |
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Address after: 230601 No. 99 Ziyun Road, Hefei Economic and Technological Development Zone, Anhui Province Patentee after: Anhui Jianghuai Automobile Group Limited by Share Ltd Address before: 230022 No. 176 Dongliu Road, Hefei City, Anhui Province Patentee before: Anhui Jianghuai Automobile Group Limited by Share Ltd |