Automobile front windshield glass imaging verification method and automobile

Abstract

The present invention provides a method for checking the imaging of a front windshield of an automobile and an automobile, wherein the method comprises: selecting a point passing through the left eye point of the driver and the luminous surface of a display screen as a plane, determining a reflection point M on the curved surface of the front windshield corresponding to the selected point on the luminous surface of the display screen based on the plane, making a normal line of the reflection point M, adjusting the plane according to the angle to check the reflection point M until the normal line is perpendicular to the curved surface of the front windshield; determining a first imaging area corresponding to the left eye point of the driver according to a plurality of incident points; determining a second imaging area corresponding to the right eye point of the driver; and taking the union of the first imaging area and the second imaging area as a target imaging area. The present invention makes the imaging area closer to the real state, is more conducive to optimizing the layout and adjustment during design, and reduces the impact of the driver or passengers being dazzled by the imaging of the display screen when driving at night.

Description

Technical Field

[0001] The present invention relates to the field of automobile technology, and in particular to a method for verifying the imaging of a front windshield of an automobile and an automobile. Background Art

[0002] When driving at night, various display screens on the car dashboard will form images on the windshield or side window glass. If the display brightness is high and the imaging area is in the area where the driver observes the road and rearview mirror, it will interfere with the driver's vision. To avoid this interference, the imaging area needs to be produced through theoretical verification of the software during design to avoid the visual observation area.

[0003] There are two main methods for making the imaging area of ​​the display screen on the curved glass: one is to use UG, but it is not conducive to parameterized layout design, and repeated verification work is cumbersome. The other is to use CAITA, which can only judge by selecting the reflection strips of typical points, and cannot find the accurate area or there are large errors in the production. Summary of the invention

[0004] This specification provides a method for calibrating the imaging of a front windshield of a car and a car to solve the deficiencies in the related art.

[0005] According to a first aspect of an embodiment of this specification, a method for verifying the imaging of a front windshield of an automobile is provided, comprising the following steps:

[0006] Establishing three-dimensional modeling data of the car, wherein the three-dimensional modeling data of the car includes a curved surface of a front windshield, a driver's eye point, and a light-emitting surface of a display screen on a car dashboard;

[0007] A plane is drawn through the driver's left eye point and a point selected on the luminous surface of the display screen, a reflection point M on the curved surface of the front windshield glass corresponding to the selected point on the luminous surface of the display screen is determined based on the plane, a normal line of the reflection point M is drawn, an angle between the normal line and the curved surface of the front windshield glass is measured, and the plane is adjusted according to the angle to check the reflection point M until the normal line is perpendicular to the curved surface of the front windshield glass; a plurality of incident points are determined based on a plurality of selected points on the luminous surface of the display screen, and a first imaging area corresponding to the driver's left eye point is determined according to the plurality of incident points;

[0008] Determine the second imaging area corresponding to the driver's right eye point by following the same steps as determining the first imaging area from the driver's left eye point;

[0009] The union of the first imaging area and the second imaging area is used as a target imaging area.

[0010] Optionally, the method further includes: determining the plane, comprising:

[0011] Connect the driver's left eye point and a selected point on the luminous surface of the display screen to form a straight line A, and select a point on the luminous surface of the display screen to form a perpendicular line B to the curved surface of the front windshield glass, and make a plane passing through the straight line A and the perpendicular line B, and the plane is set to be rotatable around the straight line A;

[0012] The selected point on the light-emitting surface of the display screen is a point on the boundary of the light-emitting surface of the display screen.

[0013] Optionally, measuring the angle between the normal line and the curved surface of the front windshield, and adjusting the plane according to the angle to check the reflection point M until the normal line is perpendicular to the curved surface of the front windshield, comprises:

[0014] The plane is rotated around a straight line A connecting the driver's left eye point and a selected point on the luminous surface of the display screen,

[0015] Measuring the angle between the normal line and the curved surface of the front windshield, and calculating the difference between the angle and 90°;

[0016] The screen is adjusted to rotate around the straight line A according to the difference angle, and the reflection point M is corrected so that the normal line is perpendicular to the curved surface of the front windshield.

[0017] Optionally, the determining, based on the plane, a reflection point M on the curved surface of the front windshield glass corresponding to a selected point on the luminous surface of the display screen comprises:

[0018] Make a sketch on the plane, make the tangent point of the intersection line between the plane and the curved surface of the front windshield, make a perpendicular line through the tangent point, and use the perpendicular line as the normal line of the incident point M.

[0019] Optionally, the method further comprises

[0020] The straight line connecting the selected point on the luminous surface of the display screen and the tangent point is the incident light, and the straight line connecting the tangent point and the left eye point is the reflected light, constraining the incident light and the reflected light to be symmetrical relative to the normal.

[0021] Optionally, the method further includes: determining the plane, comprising:

[0022] Connect the driver's right eye point and a selected point on the luminous surface of the display screen to form a straight line A, and select a point on the luminous surface of the display screen to form a perpendicular line B to the curved surface of the front windshield glass, and make a plane passing through the straight line A and the perpendicular line B, and the plane is set to be rotatable around the straight line A;

[0023] The selected point on the light-emitting surface of the display screen is a point on the boundary of the light-emitting surface of the display screen.

[0024] Optionally, measuring the angle between the normal line and the curved surface of the front windshield, and adjusting the plane according to the angle to check the reflection point M until the normal line is perpendicular to the curved surface of the front windshield, comprises:

[0025] The plane is rotated around the straight line A connecting the right eye point of the driver and the selected point on the luminous surface of the display screen,

[0026] Measuring the angle between the normal line and the curved surface of the front windshield, and calculating the difference between the angle and 90°;

[0027] The screen is adjusted to rotate around the straight line A according to the difference angle, and the reflection point M is corrected so that the normal line is perpendicular to the curved surface of the front windshield.

[0028] Optionally, the selected points on the light-emitting surface of the display screen at least include points on the four corners of the light-emitting surface of the display screen.

[0029] According to a second aspect of the embodiments of this specification, a car is provided, wherein the imaging area of ​​the luminous surface of the display screen on the dashboard of the car on the curved surface of the front windshield is calibrated using the above-mentioned calibration method.

[0030] The automobile windshield imaging verification method provided in this specification selects a point on the luminous surface of the display screen as a plane passing through the driver's left eye point, determines the normal of the reflection point M on the curved surface of the windshield based on the plane, adjusts the normal to be perpendicular to the curved surface of the windshield, and then determines the accurate imaging area. By correcting the reflection point M by this method, the imaging area is closer to the actual state, which is more conducive to optimizing the layout adjustment during design, and reducing the impact of the driver or passenger being dazzled by the display screen imaging when driving at night. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of automobile three-dimensional modeling data shown in an exemplary embodiment of this specification.

[0032] Figure 2 It is a schematic diagram of a plane S determined by a left eye point, a selected point on the light-emitting surface of a display screen, and a curved surface of a front windshield, shown in an exemplary embodiment of this specification.

[0033] Figure 3 FIG. 1 is a schematic diagram of determining a reflection point M according to an exemplary embodiment of the present specification.

[0034] Figure 4 is a schematic diagram showing an exemplary embodiment of the present specification showing an angle between a measuring reflection point M and a front windshield.

[0035] Figure 5 Schematic diagram of a corrected reflection point M shown in an exemplary embodiment of this specification.

[0036] Figure 6 Schematic diagram of a first imaging area corresponding to a left eye point shown in an exemplary embodiment of this specification.

[0037] Figure 7 It is a schematic diagram of the intersection area of ​​the first imaging area and the second imaging area shown in an exemplary embodiment of this specification.

[0038] The front windshield glass curved surface 1; the display screen luminous surface 2. DETAILED DESCRIPTION

[0039] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with this specification. Instead, they are merely examples of methods consistent with some aspects of this specification as detailed in the appended claims.

[0040] When performing the automobile windshield imaging calibration method, Figure 1 As shown, firstly, the three-dimensional modeling data of the car is established, and the three-dimensional modeling data of the car includes the front windshield curved surface 1, the driver's eye point and the luminous surface of the display screen on the car dashboard. The driver's eye point includes the left eye point and the right eye point. In the embodiment of this specification, the method uses CATIA to produce the three-dimensional modeling data of the car. During the use of the verification method described in this specification, if there is no influence of other factors, it is also applicable to the front door window glass imaging verification.

[0041] The automobile windshield imaging verification method provided in this specification includes the following steps:

[0042] Step S100, a plane is drawn through the driver's left eye point and a point selected on the display screen luminous surface 2, and a reflection point M on the front windshield curved surface 1 corresponding to the selected point on the display screen luminous surface 2 is determined based on the plane.

[0043] First, the reflection point selection on the display screen luminous surface 2 is determined, and the selected point on the display screen luminous surface 2 is one of the points on the boundary of the display screen luminous surface 2. The selected points on the display screen luminous surface 2 at least include the points on the four corners of the display screen luminous surface 2, so as to form the outline of the display screen reflection, that is, the reflected imaging area. Each selected point on the display screen luminous surface 2 needs to determine a corresponding reflection point on the front windshield. A reference plane needs to be determined in the process.

[0044] For example, take the driver's left eye point as an example. Figure 2As shown, the upper left corner of the four corners of the display screen luminous surface 2 is determined as the selected point C. A straight line A is connected between the driver's left eye point and the selected point on the display screen luminous surface 2, and a perpendicular line B to the front windshield curved surface 1 is made through the selected point C on the display screen luminous surface 2. A plane S passing through the straight line A and the perpendicular line B is made, and the plane S is set to be rotatable around the straight line A. The plane S can rotate around the straight line A, which facilitates the accurate determination of the reflection point corresponding to the selected point C in the subsequent steps.

[0045] like Figure 3 As shown, when determining the reflection point corresponding to the selected point C, a sketch is made on the plane S, the plane S intersects with the front windshield curved surface 1 to obtain an intersection line, and the tangent point of the intersection line between the plane S and the front windshield curved surface 1 is made, and the tangent point is the reflection point M corresponding to the selected point C.

[0046] Step S200, draw a normal line of the reflection point M, measure the angle between the normal line and the front windshield curved surface 1, and adjust the plane according to the angle to calibrate the reflection point M until the normal line is perpendicular to the front windshield curved surface 1.

[0047] like Figure 3 As shown, a perpendicular line to the tangent is drawn through the tangent point, and the perpendicular line is taken as the normal line L of the incident point M. The straight line connecting the selected point C on the light-emitting surface 2 of the display screen and the tangent point (reflection point M) is the incident light, and the straight line connecting the tangent point and the left eye point is the reflected light, and the incident light and the reflected light are constrained to be symmetrical with respect to the normal; that is, the tangent point, the incident light, the reflected light, and the normal are completely determined, and the relationship among the four remains unchanged during correction.

[0048] like Figure 4 As shown, in actual operation, by measuring the angle between the normal line L made in the sketch and the front windshield curved surface 1, it is found that the normal line L is not completely perpendicular to the windshield (and the greater the curvature of the glass, the worse the perpendicularity between the normal line L and the windshield), which means that there is an error in the reflection point M. This manual corrects the reflection point M by adjusting the angle of rotation of the plane S around the straight line A to make it completely perpendicular to the windshield curved surface.

[0049] Specifically, after making the normal line L, the angle between the normal line L and the front windshield curved surface 1 is measured. For example, the measured value is 89.96 degrees (degrees represent angles). This indicates that the angle between the normal line L and the front windshield curved surface 1 is not perpendicular and needs to be corrected. After measuring the angle between the normal line and the front windshield curved surface 1, the difference between the angle and 90 degrees is calculated.

[0050] The difference between 89.96 and 90 is calculated to be 0.04. Then the plane S is rotated around the straight line A connecting the driver's left eye point and the selected point on the light-emitting surface 2 of the display screen, and the screen is adjusted to rotate around the straight line A to 0.04° according to the difference angle, and the reflection point M is corrected. When the plane S is rotated, the reflection point M is also displaced accordingly.

[0051] like Figure 5 As shown, the angle between the normal line L and the front windshield curved surface 1 is measured again, and the plane S is adjusted to rotate around the straight line A again; the above steps are repeated until the normal line L is perpendicular to the front windshield curved surface 1. When the normal line L is perpendicular to the front windshield curved surface 1, the tangent point of the intersection between the plane S and the front windshield curved surface 1 is the corrected reflection point M.

[0052] Step S300: determining a plurality of incident points based on a plurality of selected points on the light-emitting surface 2 of the display screen, and determining a first imaging area corresponding to the left eye point of the driver based on the plurality of incident points.

[0053] The above steps S100 to S200 determine a reflection point M corresponding to a point selected on the display screen light-emitting surface 2 and perform correction. If it is necessary to determine the imaging area of ​​the entire display screen light-emitting surface 2 on the front windshield curved surface 1, at least the reflection points M at the four corners of the display screen light-emitting surface 2 should be determined. That is, the corrected reflection points M at the other three corners of the display screen light-emitting surface 2 are determined repeatedly according to the above steps.

[0054] Of course, the corrected reflection points M corresponding to the four midpoints of the boundary of the light-emitting surface 2 of the display screen may also be determined.

[0055] like Figure 6 As shown, the various reflection points M are connected to form a first imaging area corresponding to the driver's left eye point.

[0056] Step S400: Determine a second imaging area corresponding to the driver's right eye point in the same manner as determining the first imaging area using the driver's left eye point.

[0057] After determining the first imaging area corresponding to the driver's left eye point, the second imaging area corresponding to the driver's right eye point is determined using the method for determining the first imaging area with the driver's left eye point.

[0058] The left eye point in the above steps S100 to S300 is replaced by the right eye point, and the steps are repeated to obtain a second imaging area.

[0059] Step S500: taking the union of the first imaging area and the second imaging area as a target imaging area.

[0060] like Figure 7As shown, after the first imaging area and the second imaging area are determined through the above steps, the union of the two areas is taken, which is the imaging area of ​​the display screen luminous surface 2 on the front windshield curved surface 1 actually determined by the left and right eyes of the driver. And the determined imaging area is the target imaging area obtained by the method of this specification, and the error of area production is small. While correcting the error produced by the ordinary method, the complete area of ​​the display screen imaging can be produced more conveniently and accurately, and the error is small, which is conducive to parameterized adjustment, reduces the workload when arranging the display screen, and improves accuracy.

[0061] The implementation method of this specification is further explained below with a specific operation method flow.

[0062] First, prepare the data on the position of the entire vehicle to determine the reference plane.

[0063] like Figure 1 As shown, the driver's eye point, the front windshield curved surface 1 and the display screen luminous surface 2 are prepared on the vehicle position.

[0064] like Figure 2 As shown, a straight line A is drawn by connecting the driver's left eye point and a point selected on the luminous surface 2 of the display screen (the upper left corner point on the boundary of the luminous surface of the display screen); a straight line B is drawn perpendicular to the front windshield through a point selected at the upper left corner on the luminous surface 2 of the display screen; a plane S is made passing through the straight lines A and B, and this plane is set to be rotatable around the straight line A.

[0065] Then determine the reflection point of the selected point on the front windshield curved surface 1, and draw a normal through the reflection point.

[0066] like Figure 3 As shown, a sketch is made on plane S, plane S intersects with the front windshield surface to obtain an intersection line, a tangent line is made to the intersection line to find the tangent point as the reflection point M, and a perpendicular line through the tangent point is made to be the normal line L. The straight line connecting the selected point on the display screen luminous surface 2 and the tangent point is the incident light, and the straight line connecting the tangent point and the left eye point is the reflected light. The incident light and the reflected light are constrained to be symmetrical relative to the normal, and the tangent point, incident light, reflected light, and normal are completely determined.

[0067] Then the reflection point M is checked.

[0068] like Figures 4 to 5 , rotate the plane S around the straight line A connecting the driver's left eye point and the selected point on the display screen light-emitting surface 2, measure the angle between the normal line L and the front windshield curved surface 1, and calculate the difference between the angle and 90°. According to the difference angle, adjust the rotation of the screen around the straight line A, and correct the reflection point M so that the normal line L is perpendicular to the front windshield curved surface 1. The corrected reflection point M is used as the basic point for the subsequent production of the first imaging area.

[0069] Repeat the above steps to determine the reflection points of the lower left corner, upper right corner, and lower right corner of the display screen luminous surface 2, and correct each reflection point. Connect the four reflection points corresponding to the upper left corner, lower left corner, upper right corner, and lower right corner to form the first imaging area of ​​the left eye point, such as Figure 6 shown.

[0070] The method step of determining the first imaging area with reference to the left eye point produces the second imaging area corresponding to the right eye point.

[0071] For example: connect the driver's right eye point and the point selected on the luminous surface 2 of the display screen (the upper right corner point on the boundary of the display screen) to make a straight line A2; through the point selected in the upper right corner of the luminous surface 2 of the display screen, make a straight line B2 perpendicular to the front windshield; make a plane passing through the straight lines A2 and B2, and set this plane to be rotatable around the straight line A2.

[0072] Draw a sketch on a plane, and the plane intersects with the front windshield surface to obtain an intersection line. Draw a tangent to the intersection line to find the tangent point as the reflection point M2, and draw a perpendicular line to the tangent through the tangent point as the normal line L2. The straight line connecting the selected point on the display screen light-emitting surface 2 and the tangent point is the incident light, and the straight line connecting the tangent point and the right eye point is the reflected light. The incident light and the reflected light are constrained to be symmetrical relative to the normal, and the tangent point, incident light, reflected light, and normal are completely determined. The plane is rotated around the straight line A2 connecting the driver's right eye point and the selected point on the display screen light-emitting surface 2, and the angle between the normal line L2 and the front windshield curved surface 1 is measured, and the difference angle between the angle and 90° is calculated. Adjust the screen to rotate around the straight line A2 by the difference angle, and correct the reflection point M2 so that the normal line L is perpendicular to the front windshield curved surface 1. The corrected reflection point M2 is used as the basic point for the subsequent production of the second imaging area.

[0073] The first imaging area and the second imaging area produced by the above method are combined, and the union of the first imaging area and the second imaging area is used as the target imaging area.

[0074] This specification also provides a method for manufacturing a car.

[0075] An automobile, characterized in that the calibration of the imaging area of ​​the luminous surface of the display screen on the dashboard of the automobile on the curved surface of the front windshield is achieved by using the above-mentioned calibration method.

[0076] The above description is only a preferred embodiment of this specification and is not intended to limit this specification. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of this specification should be included in the scope of protection of this specification.

Claims

1. A method for checking the imaging of a front windshield of an automobile, characterized in that: The following steps are involved: Establishing three-dimensional modeling data of the car, wherein the three-dimensional modeling data of the car includes a curved surface of a front windshield, a driver's eye point, and a light-emitting surface of a display screen on a car dashboard; A plane is drawn through the driver's left eye point and a point selected on the luminous surface of the display screen, a reflection point M on the curved surface of the front windshield glass corresponding to the selected point on the luminous surface of the display screen is determined based on the plane, a normal line of the reflection point M is drawn, an angle between the normal line and the curved surface of the front windshield glass is measured, and the plane is adjusted according to the angle to check the reflection point M until the normal line is perpendicular to the curved surface of the front windshield glass; Determine a plurality of incident points based on a plurality of selected points on the light-emitting surface of the display screen, and determine a first imaging area corresponding to the left eye point of the driver based on the plurality of incident points; Determine the second imaging area corresponding to the driver's right eye point by following the same steps as determining the first imaging area from the driver's left eye point; The union of the first imaging area and the second imaging area is used as a target imaging area.

2. The automobile windshield imaging verification method according to claim 1, characterized in that: Also includes: Determining the plane includes: connecting the driver's left eye point and a selected point on the luminous surface of the display screen to form a straight line A, passing through the selected point on the luminous surface of the display screen to form a perpendicular line B to the curved surface of the front windshield glass, and making a plane passing through the straight line A and the perpendicular line B, wherein the plane is configured to be rotatable around the straight line A; The selected point on the light-emitting surface of the display screen is a point on the boundary of the light-emitting surface of the display screen.

3. The automobile windshield imaging verification method according to claim 1, characterized in that: The measuring of the angle between the normal line and the curved surface of the front windshield, and adjusting the plane according to the angle to check the reflection point M until the normal line is perpendicular to the curved surface of the front windshield, comprises: rotating the plane around a straight line A connecting the driver's left eye point and a selected point on the luminous surface of the display screen, measuring the angle between the normal line and the curved surface of the front windshield, and calculating the difference between the angle and 90°; The screen is adjusted to rotate around the straight line A according to the difference angle, and the reflection point M is corrected so that the normal line is perpendicular to the curved surface of the front windshield.

4. The automobile windshield imaging verification method according to claim 1, characterized in that: The method of determining the reflection point M on the curved surface of the front windshield corresponding to the selected point on the luminous surface of the display screen based on the plane includes: making a sketch on the plane, making a tangent point of the intersection of the plane and the curved surface of the front windshield, making a perpendicular line through the tangent point, and taking the perpendicular line as the normal of the incident point M.

5. The automobile windshield imaging verification method according to claim 4, characterized in that: It also includes a straight line connecting a point selected on the luminous surface of the display screen and the tangent point as an incident light ray, a straight line connecting the tangent point and the left eye point as a reflected light ray, and constraining the incident light ray and the reflected light ray to be symmetrical relative to a normal line.

6. The automobile windshield imaging verification method according to claim 1, characterized in that: Also includes: Determining the plane includes: connecting the driver's right eye point and a selected point on the luminous surface of the display screen to form a straight line A, passing through the selected point on the luminous surface of the display screen to form a perpendicular line B to the curved surface of the front windshield glass, and making a plane passing through the straight line A and the perpendicular line B, wherein the plane is configured to be rotatable around the straight line A; The selected point on the light-emitting surface of the display screen is a point on the boundary of the light-emitting surface of the display screen.

7. The automobile windshield imaging verification method according to claim 1, characterized in that: The measuring of the angle between the normal line and the curved surface of the front windshield, and adjusting the plane according to the angle to check the reflection point M until the normal line is perpendicular to the curved surface of the front windshield, comprises: rotating the plane around a straight line A connecting the driver's right eye point and a selected point on the luminous surface of the display screen, measuring the angle between the normal line and the curved surface of the front windshield, and calculating the difference between the angle and 90°; The screen is adjusted to rotate around the straight line A according to the difference angle, and the reflection point M is corrected so that the normal line is perpendicular to the curved surface of the front windshield.

8. The automobile windshield imaging verification method according to claim 1, characterized in that: The selected points on the light-emitting surface of the display screen at least include points on the four corners of the light-emitting surface of the display screen.

9. A car, characterized in that: The calibration of the imaging area of ​​the luminous surface of the display screen on the dashboard of the automobile on the curved surface of the front windshield is achieved by using the calibration method described in any one of claims 1 to 8.

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