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CN-121997576-A - Front windshield glass design method

CN121997576ACN 121997576 ACN121997576 ACN 121997576ACN-121997576-A

Abstract

The invention relates to the technical field of automobile body design, and provides a front windshield glass design method. The method comprises the steps of S1, positioning a standard dummy to a theoretical H point on an adjustable object rack according to a whole vehicle framework parameter, primarily positioning a front windshield glass and the black edge thereof according to a modeling parameter, S2, carrying out subjective evaluation on a front view based on the H point by a tester covered by 5-95% of a height percentile, synchronously and dynamically optimizing the inclination angle, the C point position and the black edge width of each edge of the glass according to the H point, S3, carrying out three-dimensional scanning on the optimized glass, converting obtained point cloud data into a whole vehicle design coordinate system, and outputting final design parameters such as the three-dimensional coordinates, the inclination angle and the black edge width of the glass. According to the invention, man-machine subjective evaluation and multi-parameter integrated optimization are pre-arranged in the design initial stage, so that the coordination of modeling, man-machine and technology is realized, the later modification cost and the safety risk are greatly reduced, and the output accurate parameters can be directly used for guiding the construction of a modeling curved surface and an engineering digital model.

Inventors

  • YAN LEI

Assignees

  • 武汉江夏楚能汽车技术研发有限公司

Dates

Publication Date
20260508
Application Date
20260113

Claims (10)

  1. 1. A method of designing a windshield, comprising: S1, positioning a standard dummy to a theoretical H point determined according to the whole vehicle framework parameters on an adjustable real object bench, and preliminarily positioning a front windshield glass based on preset modeling parameters, wherein the theoretical H point is the rotation center of the trunk and the thigh of the standard dummy; S2, in a driving environment simulated by the physical rack, subjectively evaluating a view in front of a vehicle by a tester with height representativeness based on the theoretical H point, and synchronously optimizing the arrangement position, the inclination angle and the black border of the front windshield based on an evaluation result so as to meet the view requirement; And S3, performing three-dimensional scanning on the optimized front windshield glass, converting entity data obtained by scanning into a whole vehicle design coordinate system, and outputting final design parameters.
  2. 2. The method for designing a front windshield according to claim 1, further comprising, before step S1: and establishing a three-dimensional real vehicle coordinate system by taking the horizontal ground as a reference and taking the contact point between the outermost side of the front wheel of the vehicle and the ground as the origin of the coordinate system.
  3. 3. A method for designing a windshield according to claim 2, wherein in step S1, positioning the standard dummy to a theoretical H point determined according to the vehicle architecture parameters comprises: S101, inputting whole vehicle architecture parameters, wherein the whole vehicle architecture parameters at least comprise an origin to pedal point distance (L1), a floor height (H1) from the ground to the inside of the vehicle and a human sitting height (H4); S102, calculating to obtain the position of a theoretical H point in the real vehicle coordinate system through an ergonomic formula according to the whole vehicle architecture parameters, wherein the theoretical H point is the rotation center of the trunk and the thigh of the standard dummy; S103, adjusting positions of the physical seat and the standard dummy on the physical bench to enable an H point of the dummy to coincide with the calculated theoretical H point.
  4. 4. The method for designing a front windshield according to claim 2, wherein in step S1, the preliminary positioning of the front windshield based on preset modeling parameters includes: S104, inputting preset modeling parameters, wherein the modeling parameters at least comprise an origin to C point distance (L2), an in-vehicle floor to C point height (H2) and a front windshield glass inclination angle (A1), and the C point is a position where a horizontal line passing through the highest point at the rear part of the engine hood intersects with the lower end of the front windshield glass; s105, determining the position of a C point in the real vehicle coordinate system based on the distance (L2) from the origin point to the C point and the height (H2) from the floor in the vehicle to the C point, and combining the inclination angle (A1) of the front windshield glass by taking the C point as a reference, and installing and primarily fixing the front windshield glass on the real object bench; s106, primarily adjusting the widths of the black edges of the front windshield in the upper direction, the lower direction, the left direction and the right direction to a preset value.
  5. 5. A method of designing a windscreen according to claim 1, wherein in step S2, the test person having a height representative comprises a population of test persons having a height percentile coverage of 5% to 95%.
  6. 6. A method for designing a front windshield according to claim 1, characterized in that step S2 comprises: s201, guiding each tester to sit so that the H point of the tester is positioned at the theoretical H point after sitting and the eyepoint of the tester is positioned in a preset range determined by the theoretical H point; S202, under the condition of a real driving sitting posture, a tester evaluates a front visual field, wherein evaluation indexes at least comprise a front upper visual field, a front lower visual field and an A column obstacle angle; s203, according to real-time feedback of a tester, the modeling parameters and the black edge position of the front windshield glass are synchronously adjusted on the real object rack.
  7. 7. The method for designing a front windshield according to claim 6, wherein in step S203, the step of synchronously adjusting the molding parameters and the black edge position of the front windshield comprises: Dynamically optimizing the widths of the upper, lower, left and right black edges of the front windshield glass, changing the position of the point C by adjusting the distance (L2) from the original point to the point C and the height (H2) from the floor in the automobile to the point C, and adjusting the inclination angle (A1) of the front windshield glass until all visual field indexes meet the requirements, wherein the point C is the intersection position of the horizontal line passing through the highest point at the rear part of the engine cover and the lower end of the front windshield glass.
  8. 8. The method for designing a front windshield according to claim 2, wherein in step S3, the three-dimensional scanning is performed on the optimized front windshield, and the entity data obtained by the scanning is converted into a whole vehicle design coordinate system, including: s301, scanning the space position, the outline shape and the black edge boundary of the front windshield glass after optimization determination by using a three-coordinate scanner based on the origin of the real vehicle coordinate system to obtain three-dimensional point cloud data; S302, converting the three-dimensional point cloud data from a coordinate system taking an origin of a real vehicle as a reference to a whole vehicle design coordinate system through a coordinate transformation algorithm.
  9. 9. A method of designing a windshield according to claim 8, wherein in step S3, the outputting of the final design parameters includes: and S303, extracting and outputting final three-dimensional space coordinates, a normal inclination angle and final width values of peripheral black edges of the front windshield glass based on the point cloud data converted into the whole vehicle design coordinate system.
  10. 10. The method for designing a front windshield according to any one of claims 1 to 9, further comprising: S4, keeping the position, the inclination angle and the black edge boundary of the front windshield glass which are optimally determined on the real object rack unchanged; The simulation state of the whole vehicle architecture parameters is changed by adjusting the man-machine hard point arrangement on the physical rack, wherein the man-machine hard point arrangement comprises pedal, floor or seat arrangement; Repositioning the standard dummy to a new theoretical H point calculated according to the adjusted architecture parameters; and checking whether the determined front windshield still meets the visual field requirement under the condition of new man-machine hard spot arrangement, and correcting the man-machine hard spot scheme in the total arrangement of the whole vehicle according to a checking result.

Description

Front windshield glass design method Technical Field The invention relates to the technical field of automobile body design, in particular to a front windshield glass design method. Background In the traditional vehicle development process, the determination of the boundaries and the positioning of the front windshield is a critical task, which directly influences the visual safety of the driver, the aesthetic appearance of the whole vehicle and the aerodynamic performance. Currently, the conventional methods commonly employed in the industry rely primarily on a step-wise design verification process. Firstly, a designer preliminarily sets the size of the glass according to the vision requirements of the area A and the area B of the front windshield glass by regulations, and simultaneously, the installation position and the boundary contour of the glass are defined by combining the key parameters such as an upper front vision, a lower front vision, an A column obstacle angle and the like with the ergonomic targets. And then, the modeling department completes the manufacture of the whole vehicle digital model or the oil sludge model according to the theoretical parameters. However, by adopting the traditional development method, the substantial verification of whether the front windshield glass can completely meet the requirements of various visual fields is carried out in a real vehicle trial manufacturing stage after the modeling is frozen. The hysteresis causes the defects that firstly, the rationality of the position and the boundary of glass cannot be timely and intuitively verified in the early design stage, the risk of disjoint between the establishment of a visual field target and actual experience exists, and secondly, the fact that the front visual field does not meet the requirements is found in the actual vehicle stage, and the modification cost is extremely high and the period is long due to a plurality of links such as modeling, mold opening and assembly. This often forces the project team to compromise and yield the small field of view that exists, thus burying traffic safety hazards. In view of the above, the prior art lacks an effective means for enabling a rapid, intuitive, integrated verification of the layout of the windscreen at the beginning of the design, i.e. before the curing of the styling solution. In order to overcome the hysteresis and high cost drawbacks of the conventional methods, an innovative design of the front windshield arrangement is urgently needed. Disclosure of Invention Aiming at the technical problems in the prior art, the invention provides a front windshield design method which integrates man-machine subjective evaluation, modeling requirements and process constraints in advance, realizes accurate and efficient determination of the boundary and the position of a front windshield glass, and ensures the reliability and the safety of driving vision from the source. The invention provides a design method of a front windshield glass, which comprises the following steps: S1, positioning a standard dummy to a theoretical H point determined according to the whole vehicle framework parameters on an adjustable real object bench, and preliminarily positioning a front windshield glass based on preset modeling parameters, wherein the theoretical H point is the rotation center of the trunk and the thigh of the standard dummy; S2, in a driving environment simulated by the physical rack, subjectively evaluating a view in front of a vehicle by a tester with height representativeness based on the theoretical H point, and synchronously optimizing the arrangement position, the inclination angle and the black border of the front windshield based on an evaluation result so as to meet the view requirement; And S3, performing three-dimensional scanning on the optimized front windshield glass, converting entity data obtained by scanning into a whole vehicle design coordinate system, and outputting final design parameters. On the basis of the technical scheme, the invention can also make the following improvements. Optionally, before step S1, the method further includes: and establishing a three-dimensional real vehicle coordinate system by taking the horizontal ground as a reference and taking the contact point between the outermost side of the front wheel of the vehicle and the ground as the origin of the coordinate system. Optionally, in step S1, locating the standard dummy to the theoretical H point determined according to the overall vehicle architecture parameter includes: S101, inputting whole vehicle architecture parameters, wherein the whole vehicle architecture parameters at least comprise an origin to pedal point distance (L1), a floor height (H1) from the ground to the inside of the vehicle and a human sitting height (H4); S102, calculating to obtain the position of a theoretical H point in the real vehicle coordinate system through an ergonomic formula according to the whole ve