Method for drawing variable curvature combination instrument cover, combination instrument cover and drawing device

Abstract

The present invention discloses a method for drawing a variable curvature combination instrument cover, a combination instrument cover and a drawing device, the method comprising: obtaining historical reference data, determining the first focus and the second focus of the ellipse and the center point of the ellipse; taking the distance between the center point of the ellipse and the reference point as the radius of the long semi-axis of the ellipse, and drawing the ellipse in combination with the above conditions; intercepting a guide line according to the ellipse; taking any point on the long semi-axis of the ellipse as the center of the circle, passing through the vertex of the ellipse close to the side of the combination instrument cover, and drawing a circle on the long semi-axis plane of the ellipse, intercepting an arc for drawing the initial curved surface of the combination instrument cover; according to the arc and the guide line, sweeping to obtain the initial curved surface of the combination instrument cover, and cutting the initial curved surface to obtain the engineering curved surface of the combination instrument cover. The invention aims to solve the technical problem that it is difficult to completely avoid the occurrence of reflection problems in the existing single curvature instrument cover, and there is also a virtual image formed on the instrument cover.

Description

Technical Field

[0001] The present invention relates to the technical field of automobiles, and in particular to a method for drawing a variable curvature combined instrument cover, a combined instrument cover and equipment. Background Art

[0002] Due to the rapid development of new technologies and intelligent network connection technologies, more and more full LCD instrument clusters are being used. For some traditional instrument clusters, there is often a layer of acrylic mask on the surface, which has a greater risk of reflection and can easily cause some human-machine problems for the driver during driving. The way to avoid this problem is to adjust the angle of the instrument and the curvature of the instrument cover.

[0003] However, it is difficult to completely avoid the reflection problem with a single-curvature instrument cover, and there is also a virtual image formed on the instrument cover, which leads to obvious deficiencies during use. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a method for drawing a variable curvature combination instrument cover, a combination instrument cover and an apparatus, aiming to solve the technical problem that it is difficult to completely avoid the occurrence of reflection problems with single-curvature instrument covers in the prior art, and there is a virtual image formed on the instrument cover by drawing a variable curvature combination instrument cover.

[0005] A first aspect of the present invention is to provide a method for drawing a variable curvature combination instrument cover, which is applied to a drawing program to draw a variable curvature combination instrument cover, and the method comprises:

[0006] Acquire a historical reference data, determine the eye contour of the driver and a reference point at any position on the combination instrument cover according to the historical reference data, and make an extension line at the reference point to be tangent to the eye contour as a first focus;

[0007] Based on the historical reference data, determine any point on the steering shield as the second focus, draw a focal line between the first focus and the second focus, and determine the midpoint of the focal line as the center point of the ellipse;

[0008] Determine the focus line as the X-axis, and determine the line tangent to the focus line at the center point of the ellipse as the Y-axis;

[0009] The distance between the center point of the ellipse and the reference point is used as the radius of the major semi-axis of the ellipse, and the ellipse is drawn in combination with the above conditions;

[0010] According to the ellipse, intercepting a guide line for drawing an initial curved surface of the combination instrument cover;

[0011] Taking any point on the major semi-axis of the ellipse as the center, drawing a circle on the major semi-axis plane of the ellipse through the vertex of the ellipse on the side close to the combination instrument cover, and intercepting the arc used to draw the initial curved surface of the combination instrument cover;

[0012] An initial curved surface of the combination instrument cover is obtained by sweeping according to the arc and the guide line, and the initial curved surface is cut based on a preset cutting rule to obtain an engineering curved surface of the combination instrument cover.

[0013] According to one aspect of the above technical solution, a historical reference data is obtained, and a reference point of the driver's eye contour and any position on the combination instrument cover is determined according to the historical reference data. In the step of making an extension line from the reference point to a first focus that is tangent to the eye contour, the eye contour is an eye ellipse, and the eye ellipse is a 99th percentile eye ellipse;

[0014] Furthermore, the reference point is located at the lowermost end of the combination instrument cover, and an extension line is drawn from the reference point located at the lowermost end of the combination instrument cover to be tangent to the eye ellipse, so as to determine the tangent point as the first focus for drawing the ellipse.

[0015] According to one aspect of the above technical solution, based on the historical reference data, any point on the steering guard is determined as the second focus, a focus line is drawn between the first focus and the second focus, and the midpoint of the focus line is determined as the center point of the ellipse. In the step, the second focus is located at the highest point on the steering guard.

[0016] According to one aspect of the above technical solution, a circle is drawn on the plane of the major axis of the ellipse with any point on the major axis of the ellipse as the center, passing through the vertex of the ellipse on the side close to the combination instrument cover, and intercepting the arc used to draw the initial curved surface of the combination instrument cover, in the step of intercepting the arc used to draw the initial curved surface of the combination instrument cover, any point on the major axis of the ellipse that is 1000mm-2000mm away from the reference point is used as the center of the circle.

[0017] According to one aspect of the above technical solution, the point on the major semi-axis of the ellipse that is 1500 mm away from the reference point is the center of the circle used to draw the circle.

[0018] According to one aspect of the above technical solution, after the step of obtaining the engineering curved surface of the combination instrument cover, the method further includes:

[0019] Remaining design parameters of the combination instrument cover are acquired, and the engineering curved surface is drawn according to the remaining design parameters to obtain a three-dimensional model of the combination instrument cover.

[0020] A second aspect of the present invention is to provide a variable curvature combination instrument cover, wherein the variable curvature combination instrument cover is drawn by the method described in the above technical solution.

[0021] The third aspect of the present invention is to provide a drawing device, comprising a processor, a memory, and a computer program stored in the memory and executable on the processor, wherein the processor implements the method described in the above technical solution when executing the program.

[0022] Compared with the prior art, the method for drawing a variable curvature combination instrument cover, the combination instrument cover and the drawing device of the present invention have the following beneficial effects:

[0023] When drawing a variable curvature combination instrument cover, the parameters for drawing an ellipse and a circle are determined based on historical reference data, thereby drawing an ellipse and a circle, and the ellipse and the circle are respectively intercepted to obtain guide lines and arcs, and the initial surface of the combination instrument cover can be obtained by sweeping according to the guide lines and the arcs, and the engineering surface of the combination instrument cover can be obtained by intercepting the initial surface; and the parameters used to draw the ellipse and the circle can be adjusted to adjust the curvature of the initial surface of the combination instrument cover accordingly, thereby changing the curvature of the engineering surface of the combination instrument cover; the variable curvature combination instrument cover drawn in the above manner is not prone to reflections and virtual images on the combination instrument cover, which can effectively improve the user experience.

[0024] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0026] Figure 1 It is a schematic flow chart of a method for drawing a variable curvature combination instrument cover in a first embodiment of the present invention;

[0027] Figure 2 A first schematic diagram of a variable curvature combination instrument cover drawn by using a method for drawing a variable curvature combination instrument cover in a first embodiment of the present invention;

[0028] Figure 3 A second schematic diagram of a variable curvature combination instrument cover drawn by using the method for drawing a variable curvature combination instrument cover in the first embodiment of the present invention;

[0029] Figure 4 A third schematic diagram of a variable curvature combination instrument cover drawn by using the method for drawing a variable curvature combination instrument cover according to the first embodiment of the present invention;

[0030] Figure 5It is a structural schematic diagram of a drawing device for a variable curvature combination instrument cover in a fourth embodiment of the present invention. DETAILED DESCRIPTION

[0031] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings. Several embodiments of the present invention are shown in the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0032] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right", "upper", "lower" and similar expressions used herein are for illustrative purposes only and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0033] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0034] Embodiment 1

[0035] See also Figure 1-4 A first embodiment of the present invention provides a method for drawing a variable curvature combination instrument cover, which is applied to a drawing program to draw a variable curvature combination instrument cover. The method includes steps S10-S70:

[0036] Step S10, obtaining a historical reference data, determining the driver's eye contour and a reference point at any position on the combination instrument cover according to the historical reference data, and making an extension line at the reference point to be tangent to the eye contour as a first focus.

[0037] It should be particularly pointed out that the historical reference data include but are not limited to the design parameters and ergonomic parameters of the vehicle. The above historical reference data are used to determine some points that need to be used as references when drawing the variable curvature instrument cluster cover, including the first focus located at any position on the instrument cluster cover; and determine the ergonomic position range of the driver sitting in the driving seat, so as to determine the eye range of the driver sitting in the driving seat, so as to determine the eye contour of the driver in the vehicle based on the driver's sitting position range and the driver's position.

[0038] The eye contour is an eye ellipse, and the eye ellipse is the 99th percentile eye ellipse, and the reference point is located at the bottom of the combination instrument cover. When drawing a variable curvature combination instrument cover, an extension line is drawn from the reference point at the bottom of the combination instrument cover to be tangent to the eye ellipse, so as to determine the tangent point as the first focus for drawing the ellipse.

[0039] In this embodiment, the first focus of the extended line through the reference point and tangent to the eye contour is located at the bottom of the eye contour.

[0040] Step S20, based on the historical reference data, determine any point on the steering shield as the second focus, draw a focal line between the first focus and the second focus, and determine the midpoint of the focal line as the center point of the ellipse.

[0041] Similarly, any point on the steering shield (ie, the shield located below the instrument cover and behind the steering wheel) is determined as the second focus based on historical reference data; preferably, the second focus is located at the highest point on the steering shield.

[0042] When drawing the variable curvature combination instrument cover, a focal line is drawn between the first focus and the second focus, and the center point of the focal line is determined as the ellipse center point for drawing an ellipse.

[0043] Step S30, determining the focus line as the X-axis, and determining the line tangent to the focus line at the center point of the ellipse as the Y-axis.

[0044] Specifically, the line connecting the foci is the X-axis of the ellipse, and the line tangent to the line connecting the foci at the center point of the ellipse is the Y-axis.

[0045] Step S40, taking the distance between the center point of the ellipse and the reference point as the radius of the major semi-axis of the ellipse, and drawing the ellipse in combination with the above conditions.

[0046] When drawing a variable curvature instrument cluster cover, the straight-line distance between the center point of the ellipse (ie, the center point of the focal point connection line) and the reference point is used as the radius of the major semi-axis of the ellipse used to draw the ellipse.

[0047] In summary, the center point of the ellipse, the radius of the major semi-axis of the ellipse, the first focus and the second focus are determined, so that an ellipse can be drawn according to the above conditions.

[0048] Step S50: intercepting a guide line for drawing an initial curved surface of the combination instrument cover according to the ellipse.

[0049] Specifically, an ellipse is drawn according to the above conditions, with the purpose of intercepting an ellipse arc of the ellipse and using the ellipse arc as a guide line for drawing an initial curved surface of the combination instrument cover.

[0050] Step S60, drawing a circle on the plane of the major semi-axis of the ellipse with any point on the major semi-axis of the ellipse as the center, passing through the vertex of the ellipse close to the instrument cluster cover, and intercepting an arc used to draw the initial curved surface of the instrument cluster cover.

[0051] When drawing a variable curvature combination instrument cover, a circle is drawn on the plane of the major semi-axis of the ellipse, with any point on the major semi-axis of the ellipse as the center, through the vertex of the ellipse on the side of the combination instrument cover close to the ellipse, and the circle obtained by drawing is perpendicular to the ellipse in space. The circle is intercepted to obtain an arc for drawing the initial curved surface of the combination instrument cover.

[0052] Step S70 , sweeping an initial curved surface of the combination instrument cover according to the arc and the guide line, and cutting the initial curved surface based on a preset cutting rule to obtain an engineering curved surface of the combination instrument cover.

[0053] When drawing a variable curvature combination instrument cover, based on the intercepted arc and guide line, the arc is taken as the object and the guide line is used as the guide to sweep the arc to obtain the initial surface of the combination instrument cover. The initial surface of the combination instrument cover is a variable curvature surface with a certain curvature at both ends, rather than the two ends of the instrument cover being straight as in the prior art.

[0054] After the initial surface of the instrument cluster cover is obtained by sweeping, the initial surface is cut based on preset cutting rules according to the design requirements of the instrument cluster cover to obtain the engineering surface of the instrument cluster cover, which is the final surface of the instrument cluster cover.

[0055] Of course, in the later stage of engineering development, the setting parameters for drawing the ellipse and the circle can also be modified to adjust the engineering surface of the combination instrument cover accordingly.

[0056] By way of example and not limitation, when drawing a circle, the center of the circle is moved toward one side of the instrument cluster cover, thereby reducing the radius of the circle. When the relevant parameters of the guide line remain unchanged, the curvature of the initial curved surface obtained by sweeping the arc intercepted from the circle is larger, and the curvature of the engineering curved surface of the instrument cluster cover is also larger. On the contrary, increasing the radius of the circle will reduce the curvature of the initial curved surface of the instrument cluster, and the curvature of the engineering curved surface of the instrument cluster cover will also be smaller.

[0057] Therefore, the position of the center of the circle used to draw the circle can affect the curvature of the combination instrument cover in the horizontal direction, and it is important to reasonably determine the position of the center of the circle.

[0058] In the present embodiment, the point on the major axis of the ellipse that is 1500mm away from the reference point is used to draw the center of the circle, and the circle drawn with this point as the center has moderate curvature, and the combined instrument cover drawn is not prone to reflections and virtual images after simulation tests, thereby being able to better meet the usage needs of most drivers; of course, in other embodiments of the present invention, any point on the major axis of the ellipse that is 1000mm-2000mm away from the reference point is used to draw the center of the circle, and technical personnel in this field can flexibly adjust it according to vehicle specifications.

[0059] In summary, the method for drawing a variable curvature combination instrument cover shown in this embodiment has the following beneficial effects compared with the prior art:

[0060] When drawing a variable curvature combination instrument cover, the parameters for drawing an ellipse and a circle are determined based on historical reference data, thereby drawing an ellipse and a circle, and the ellipse and the circle are respectively intercepted to obtain guide lines and arcs, and the initial surface of the combination instrument cover can be obtained by sweeping according to the guide lines and the arcs, and the engineering surface of the combination instrument cover can be obtained by intercepting the initial surface; and the parameters used to draw the ellipse and the circle can be adjusted to adjust the curvature of the initial surface of the combination instrument cover accordingly, thereby changing the curvature of the engineering surface of the combination instrument cover; the variable curvature combination instrument cover drawn in the above manner is not prone to reflections and virtual images on the combination instrument cover, which can effectively improve the user experience.

[0061] Embodiment 2

[0062] The second embodiment of the present invention provides a method for drawing a variable curvature combination instrument cover. The drawing method shown in this embodiment is basically the same as the drawing method shown in the first embodiment, and the difference is that:

[0063] In this embodiment, after the step of obtaining the engineering curved surface of the combination instrument cover, the method further includes step S80:

[0064] Step S80, obtaining the remaining design parameters of the combination instrument cover, and drawing the engineering surface according to the remaining design parameters to obtain a three-dimensional model of the combination instrument cover.

[0065] The remaining design parameters of the instrument cluster cover include but are not limited to the wall thickness parameters, edge parameters, light transmission parameters and parameters of the matching parts with other components. By obtaining these remaining design parameters, the engineering surface of the instrument cluster cover can be used as the processing object for further editing and drawing, thereby obtaining a complete three-dimensional model of the instrument cluster cover.

[0066] By way of example but not limitation, the wall thickness parameter of the combination instrument cover is set to 3 mm, and the engineering curved surface of the combination instrument cover is stretched by 3 mm to obtain the final three-dimensional model of the combination instrument cover.

[0067] Embodiment 3

[0068] A third embodiment of the present invention provides a variable-curvature combination instrument cover. The variable-curvature combination instrument cover shown in this embodiment is drawn by the method described in the above embodiments.

[0069] Compared with the prior art, the combination instrument cover drawn by the method for drawing a combination instrument cover with a variable curvature has the following beneficial effects:

[0070] The variable curvature combination instrument cover is not prone to reflections and virtual images, and can effectively improve the user experience.

[0071] Embodiment 4

[0072] See also Figure 5 The fourth embodiment of the present invention provides a drawing device, including a processor 100, a memory 200, and a computer program 300 stored in the memory 200 and executable on the processor, wherein the processor 100 implements the method described in the above embodiment when executing the program.

[0073] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0074] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached claims.

Claims

1. A method for drawing a variable curvature combination instrument cover, applied to a drawing program to draw a variable curvature combination instrument cover, characterized in that: The method comprises: Acquire a historical reference data, determine the eye contour of the driver and a reference point at any position on the combination instrument cover according to the historical reference data, and make an extension line at the reference point to be tangent to the eye contour as a first focus; Based on the historical reference data, determine any point on the steering shield as the second focus, draw a focal line between the first focus and the second focus, and determine the midpoint of the focal line as the center point of the ellipse; Determine the focus line as the X-axis, and determine the line intersecting the focus line at the center point of the ellipse as the Y-axis; The distance between the center point of the ellipse and the reference point is used as the radius of the major semi-axis of the ellipse, and the ellipse is drawn in combination with the above conditions; According to the ellipse, intercepting a guide line for drawing an initial curved surface of the combination instrument cover; Taking any point on the major semi-axis of the ellipse as the center, drawing a circle on the major semi-axis plane of the ellipse through the vertex of the ellipse on the side close to the combination instrument cover, and intercepting the arc used to draw the initial curved surface of the combination instrument cover; An initial curved surface of the combination instrument cover is obtained by sweeping according to the arc and the guide line, and the initial curved surface is cut based on a preset cutting rule to obtain an engineering curved surface of the combination instrument cover.

2. The method for drawing a variable curvature combination instrument cover according to claim 1, characterized in that: Acquire a historical reference data, determine the eye contour of the driver and a reference point at any position on the combination instrument cover according to the historical reference data, in the step of making an extension line from the reference point to a first focus that is tangent to the eye contour, the eye contour is an eye ellipse, and the eye ellipse is a 99th percentile eye ellipse; Furthermore, the reference point is located at the lowermost end of the combination instrument cover, and an extension line is drawn from the reference point located at the lowermost end of the combination instrument cover to be tangent to the eyellipse, so as to determine the tangent point of the extension line and the eyellipse as the first focus for drawing the ellipse.

3. The method for drawing a variable curvature combination instrument cover according to claim 1, characterized in that: Based on the historical reference data, any point on the steering shield is determined as the second focus, a focal line is drawn between the first focus and the second focus, and the midpoint of the focal line is determined as the center point of the ellipse. In the step, the second focus is located at the highest point on the steering shield.

4. The method for drawing a variable curvature combination instrument cover according to claim 1, characterized in that: In the steps of drawing a circle on the plane of the major axis of the ellipse with any point on the major axis of the ellipse as the center, passing through the vertex of the ellipse on the side close to the combination instrument cover, and intercepting the arc used to draw the initial curved surface of the combination instrument cover, any point on the major axis of the ellipse that is 1000mm-2000mm away from the reference point is used as the center of the circle.

5. The method for drawing a variable curvature combination instrument cover according to claim 4, characterized in that: The point on the major semi-axis of the ellipse that is 1500 mm away from the reference point is the center of the circle used to draw the circle.

6. The method for drawing a variable curvature combination instrument cover according to any one of claims 1 to 5, after the step of obtaining the engineering curved surface of the combination instrument cover, the method further comprises: Remaining design parameters of the combination instrument cover are acquired, and the engineering curved surface is drawn according to the remaining design parameters to obtain a three-dimensional model of the combination instrument cover.

7. A variable curvature combination instrument cover, characterized in that: The variable curvature combination instrument cover is drawn by the method according to any one of claims 1-6.

8. A drawing device, comprising a processor, a memory, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the program, the method according to any one of claims 1 to 6 is implemented.

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