A method for arranging and verifying automotive rearview mirrors based on an eye ellipse model.

Abstract

This invention belongs to the field of automotive design ergonomics technology, specifically involving a method for the arrangement and verification of automotive rearview mirrors based on an eye ellipse model. The rearview mirror arrangement is designed and verified using an eye ellipse as the basis, providing one initial rearview mirror design position and ten different human user positions. While meeting basic regulatory requirements, it can more realistically meet the actual driving needs of most drivers of different heights and sizes, providing a good field of vision and improving the actual driving comfort of the vehicle.

Description

Technical Field

[0001] This invention belongs to the field of automotive design ergonomics technology, specifically relating to a method for arranging and verifying automotive interior rearview mirrors based on an eye ellipse model. Background Technology

[0002] The driver's field of vision directly affects the active safety of a vehicle and is a fundamental aspect that must always be considered in the overall vehicle layout and styling design. The rearview mirror's field of vision is crucial when changing lanes, turning, and reversing. The conventional method of placement is to meet the requirements of regulations. However, the regulations only require that a 20-meter straight section at 60 meters behind the vehicle can be observed through a single eyepoint. This only represents a relatively ideal field of vision for a fixed position and cannot guarantee that everyone can adjust the rearview mirror to their ideal position. Summary of the Invention

[0003] To overcome the above problems, this invention provides a method for arranging and verifying automotive rearview mirrors based on an eye ellipse model. This method is used during the vehicle design phase to determine the rearview mirror's position and adjustment range to meet regulatory requirements and satisfy the adjustment needs of drivers of different heights and weights. Combining the characteristics of the eye ellipse, the rearview mirror arrangement design and verification are based on the eye ellipse, providing one initial rearview mirror design position and ten different human user positions. While meeting basic regulatory requirements, this method can more realistically meet the actual driving needs of most drivers of different heights and sizes, providing a good field of vision and improving the actual driving comfort of the vehicle.

[0004] A method for arranging and verifying automotive rearview mirrors based on an eye ellipse model, specifically including the following:

[0005] Step 1: Based on the parameters of the developed vehicle model and the eye ellipse equation, establish the human body layout model and the eye ellipse model.

[0006] Step 2: Establish the suggested placement area for the interior rearview mirror based on the windshield and the eye ellipse;

[0007] Step 3: Based on the selected rearview mirror data and suggested placement area, initially arrange the rearview mirror positions and obtain the required field of view area according to regulations;

[0008] Step 4: Based on the vehicle's ground line and outer dimensions, establish the theoretical field of view area required by regulations;

[0009] Step 5: Adjust the position of the interior rearview mirror initially arranged in Step 3 so that the theoretical visual area includes the field of view required by regulations. Extract the position of the interior rearview mirror at this time, which is the initial design position.

[0010] Step 6: Extract the rotation center of the initial design position of the rearview mirror, establish the XYZ rotation axis with this center point, extract the leftmost extreme point of the left eye ellipse as the visual field reference point, and make the theoretical visual area of ​​the mirror according to Step 4.

[0011] Step 7: Rotate the interior rearview mirror around the XYZ axes so that the theoretical visual area of ​​the mirror surface includes the field of view required by regulations, and extract the position of the interior rearview mirror at this time as the usage position 1.

[0012] Step 8: Extract the top, bottom, front, and back points of the left eye ellipse as reference points in sequence, and repeat steps 6-7 to obtain the usage positions of the posterior retina 2-5.

[0013] Step 9: Extract the rightmost, topmost, bottommost, frontmost, and backmost points of the right eye ellipse as reference points for the field of vision. Repeat steps 6-7 to obtain the usage positions of the posterior retina 6-10.

[0014] Step 10: Extract the usage positions of 10 rearview mirrors to determine the actual usage positions of the interior rearview mirrors for drivers of different heights and sizes.

[0015] Step 11: Extract the original design position and 10 usage positions of the interior rearview mirror as layout output.

[0016] In step 2, a horizontal tangent line is drawn at the upper end of the 95% eye ellipse, a straight line is drawn that is tangent to both the lower edge of the front end of the roof and the lower edge of the 95% eye ellipse, and the intersection line of the windshield and the Y0 plane is drawn. The area enclosed by these three lines is the suggested area for the placement of the interior rearview mirror. The interior rearview mirror is initially placed in this area.

[0017] Step 3, obtaining the required field of vision, specifically involves: using the driver's seat R point as a reference, shifting upwards to obtain the driver's eye point; constructing a regulatory plane backwards from the driver's eye point; within this plane, constructing the intersection line between the unloaded ground and the regulatory plane; and selecting 10m on each side of the vehicle's longitudinal symmetrical plane from this intersection line as the standard required visual area line; taking the highest point of the interior rearview mirror surface and projecting it onto the regulatory plane along the direction of the unloaded ground line; drawing a straight line parallel to the visual area line through the projection point; and connecting this straight line segment with the two ends of the visual area line to form a rectangle. This area is the required field of vision.

[0018] Step 4 specifically involves: creating a virtual eye point for the driver's eye point, which is the symmetrical point of the driver's eye point relative to the interior rearview mirror lens. By connecting the virtual eye point with the four vertices of the interior rearview mirror and extending the line to a horizontal plane 60m behind the eye point, the visual area of ​​the eye point in this plane is created, which is the theoretical visual area.

[0019] The beneficial effects of this invention are:

[0020] The eye ellipse is a statistical representation of the spatial position of the eyes of drivers of different heights relative to a reference point inside the vehicle. Because it is elliptical, it is called the eye ellipse. The eye ellipse can reflect the actual position of the driver's eyes well. This invention combines the eye ellipse for the arrangement and calibration of the rearview mirror, which can not only meet the regulatory requirements, but also meet the actual adjustment and use requirements of drivers of different heights, so as to obtain an ideal field of vision and have good human-machine adaptability. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of the present invention and these drawings without creative effort.

[0022] Figure 1 This is a flowchart of the present invention.

[0023] Figure 2 The diagram shown is a schematic of the human body layout and the elliptical eye model.

[0024] Figure 3 The diagram shown is a preliminary suggested layout area for the interior rearview mirror.

[0025] Figure 4 The diagram shows a visual area that meets regulatory requirements.

[0026] Figure 5 The diagram shown is a schematic of the theoretical visual area of ​​the rearview mirror.

[0027] Figure 6 The diagram shows the rotation center and XYZ rotation axis of the interior rearview mirror. Detailed Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0029] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0030] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0031] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0032] Example 1

[0033] A method for arranging and verifying a car rearview mirror based on an eye ellipse model involves human body creation, eye ellipse model establishment, determination of rearview mirror lens position, determination of rearview mirror field of view area, and determination of rearview mirror adjustment range. Specifically, it includes the following:

[0034] Clearly define the vehicle coordinate system to ensure that vehicle development is carried out within the same coordinate system;

[0035] Step 1, as follows Figure 2 As shown, based on the parameters of the developed vehicle model and the eye ellipse equation, a human body layout model and eye ellipse models of the left and right eyes are established.

[0036] Step 2: Establish the suggested placement area for the interior rearview mirror based on the windshield and the eye ellipse;

[0037] Step 3, as follows Figure 4As shown, the interior rearview mirror positions are initially arranged based on the selected interior rearview mirror data and suggested placement areas, and the required field of view area is obtained according to regulations.

[0038] Step 4: Based on the vehicle's ground line and outer dimensions, establish the theoretical field of view area required by regulations;

[0039] Step 5: Adjust the position of the interior rearview mirror initially arranged in Step 3 so that the theoretical visual area includes the field of view required by regulations. Extract the position of the interior rearview mirror at this time, which is the initial design position.

[0040] Step 6, as follows Figure 6 As shown, the rotation center of the initial design position of the rearview mirror is extracted, and the XYZ rotation axis is established with this center point. The leftmost extreme point of the left eye ellipse is extracted as the visual field reference point, and the theoretical visual area of ​​the mirror is made according to step 4.

[0041] Step 7: Rotate the interior rearview mirror around the XYZ axes so that the theoretical visual area of ​​the mirror surface includes the field of view required by regulations, and extract the position of the interior rearview mirror at this time as the usage position 1.

[0042] Step 8: Extract the top, bottom, front, and back points of the left eye ellipse as reference points in sequence, and repeat steps 6-7 to obtain the usage positions of the posterior retina 2-5.

[0043] Step 9: Extract the rightmost, topmost, bottommost, frontmost, and backmost points of the right eye ellipse as reference points for the field of vision. Repeat steps 6-7 to obtain the usage positions of the posterior retina 6-10.

[0044] Step 10: Extract the usage positions of 10 rearview mirrors to determine the actual usage positions of the interior rearview mirrors for drivers of different heights and sizes.

[0045] Step 11: Extract the original design position and 10 usage positions of the interior rearview mirror as layout output, which can meet the usage needs of most drivers.

[0046] In step 2, such as Figure 3 As shown, draw a horizontal tangent line to the upper end of the 95% eye ellipse, a straight line that is tangent to both the lower edge of the front of the roof and the lower edge of the 95% eye ellipse, and the intersection line of the windshield and the Y0 plane. The area enclosed by these three lines is the suggested area for interior rearview mirror placement. The interior rearview mirror is initially placed within this area.

[0047] Step 3, obtaining the required field of vision, specifically involves: shifting the driver's seat R point upwards by 635mm to obtain the driver's eye point; constructing a regulatory plane 60m backwards from the driver's eye point; drawing the intersection line between the unloaded ground and the regulatory plane within this plane; and selecting 10m on each side of the vehicle's longitudinal symmetrical plane from this intersection line as the standard required visual area line of 20m; taking the highest point of the interior rearview mirror surface and projecting it onto the regulatory plane along the direction of the unloaded ground line; drawing a straight line parallel to the visual area line through the projection point; and connecting this straight line segment with the two ends of the visual area line to form a rectangle. This area is the required field of vision.

[0048] like Figure 5 As shown, step 4 specifically involves: creating a virtual eye point for the driver's eye point, which is the symmetrical point of the driver's eye point relative to the rearview mirror lens. By connecting the virtual eye point with the four vertices of the rearview mirror surface and extending the line to a horizontal plane 60m behind the eye point, the visual area of ​​the eye point in this plane is created, which is the theoretical visual area.

[0049] Example 2

[0050] Clearly define the vehicle coordinate system to ensure that vehicle development is carried out within the same coordinate system;

[0051] Establish a human body layout model and eye ellipse model based on the vehicle model being developed;

[0052] Establish a suggested area for rearview mirror placement based on the windshield and eye ellipse;

[0053] The interior rearview mirror positions are initially determined based on the selected interior rearview mirror data and suggested placement areas;

[0054] Establish the required field of vision area based on the vehicle's ground lines and overall dimensions;

[0055] Determine the driver's eye point based on point R and draw the theoretical visual area of ​​the mirror;

[0056] Adjust the position of the interior rearview mirror so that its theoretical visual area includes the legally required field of vision;

[0057] Extract the current position of the interior rearview mirror as the initial design position;

[0058] Extract the rotation center of the interior rearview mirror design position and establish the XYZ rotation axis;

[0059] Extract the leftmost point of the left eye ellipse as the visual field reference point and construct the mirror theory visual region;

[0060] The interior rearview mirror lens is designed to be rotated around the XYZ axis so that the theoretical visual area of ​​the mirror includes the field of view required by regulations.

[0061] Extract the current position of the rearview mirror lens as position 1;

[0062] Extract the top, bottom, front, and back points of the left eye ellipse in sequence as reference points, and repeat the above steps

[010] ,

[011] , and

[012] to obtain the rearview mirror usage positions 2, 3, 4, and 5;

[0063] The rightmost, topmost, bottommost, frontmost, and backmost points of the right eye ellipse are extracted sequentially as visual field reference points. The above steps

[010] ,

[011] , and

[012] are repeated to obtain the internal rearview mirror usage positions 6, 7, 8, 9, and 10.

[0064] Extracting 10 rearview mirror positions reveals the actual usage position of the interior rearview mirror for drivers of different heights and sizes.

[0065] The design location of the interior rearview mirror and 10 usage locations are extracted as layout outputs, which can meet the needs of most drivers.

[0066] The specific implementation is as follows:

[0067] like Figure 2 As shown, based on the parameters of the designed vehicle model and the eye ellipse equation, a human body layout model and left and right eye ellipse models are established.

[0068] like Figure 3 As shown, draw the horizontal tangent line passing through the upper end of the 95% eye ellipse, the straight line passing through the lower edge of the front end of the roof and tangent to the lower edge of the 95% eye ellipse, and the windshield and Y0.

[0069] The area enclosed by the intersection of the three lines is the suggested area for the placement of the interior rearview mirror. The interior rearview mirror should be initially placed within this area.

[0070] like Figure 4 As shown, the driver's eye point is obtained by shifting the driver's seat R point upwards by 635mm. A regulatory plane is then drawn 60m backwards from the driver's eye point. Within this plane, the intersection of the unloaded ground and this plane is drawn. On each side of the vehicle's longitudinal symmetrical plane, 10m is taken to draw the standard required visual area line. The highest point of the interior rearview mirror is taken and projected onto the regulatory plane along the direction of the unloaded ground line. A straight line segment parallel to the regulatory area line is drawn through the projection point. The two straight line segments are connected at their ends to form a rectangle. This area is the regulatory required field of vision area.

[0071] like Figure 5As shown, a virtual eyepoint is created for the driver's eye, which is the symmetrical point of the driver's eye relative to the mirror. Lines connecting the virtual eyepoint to the four vertices of the rearview mirror surface are extended to a horizontal plane 60m behind the eyepoint, creating the visual area (theoretical visual area) of the eyepoint within this plane. The rearview mirror's position is adjusted so that the theoretical visual area includes the legally required field of view; this position is the initial design position.

[0072] like Figure 6 As shown: Extract the rotation center of the rearview mirror within the design position and establish the XYZ rotation axis. Extract the leftmost extreme point of the left eye ellipse as the eye point reference point. Based on... Figure 4 The method establishes the theoretical visual area at this time, adjusts the rearview mirror to rotate around XYZ so that the theoretical visual area includes the field of view required by regulations, and extracts the lens position obtained at this time as the usage position 1.

[0073] Extract the top, bottom, front, and back points of the left eye ellipse in sequence as reference points, and repeat the above steps to obtain the rearview mirror usage positions 2, 3, 4, and 5.

[0074] Extract the rightmost, topmost, bottommost, frontmost, and backmost points of the right eye ellipse as reference points in sequence, and repeat the above steps to obtain the rearview mirror positions 6, 7, 8, 9, and 10.

[0075] The design location and 10 usage locations are used as the output for the interior rearview mirror layout.

[0076] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the scope of protection of the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, any person skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of the present invention within the scope of the technology disclosed in the present invention. These simple modifications are all within the scope of protection of the present invention.

[0077] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not describe the various possible combinations separately.

[0078] Furthermore, various different embodiments of the present invention can be combined in any way, as long as they do not violate the spirit of the present invention, they should also be regarded as the content disclosed by the present invention.

Claims

1. A method for arranging and verifying automotive rearview mirrors based on an eye ellipse model, characterized in that... Specifically, it includes the following: Step 1: Based on the parameters of the developed vehicle model and the eye ellipse equation, establish the human body layout model and the eye ellipse model. Step 2: Establish the suggested placement area for the interior rearview mirror based on the windshield and the eye ellipse; Step 3: Based on the selected rearview mirror data and suggested placement area, initially arrange the rearview mirror positions and obtain the required field of view area according to regulations; Step 4: Create a virtual eye point for the driver's eye point, which is the symmetrical point of the driver's eye point relative to the rearview mirror lens. Connect the virtual eye point to the four vertices of the rearview mirror and extend the line to a horizontal plane 60m behind the eye point to create the visual area of ​​the eye point in this plane, which is the theoretical visual area. Step 5: Adjust the position of the interior rearview mirror initially arranged in Step 3 so that the theoretical visual area includes the field of view required by regulations. Extract the position of the interior rearview mirror at this time, which is the initial design position. Step 6: Extract the rotation center of the initial design position of the rearview mirror, establish the XYZ rotation axis with the rotation center, extract the leftmost extreme point of the left eye ellipse as the visual field reference point, and make the theoretical visual area of ​​the mirror according to Step 4. Step 7: Rotate the interior rearview mirror around the XYZ axes so that the theoretical visual area of ​​the mirror surface includes the field of view required by regulations, and extract the position of the interior rearview mirror at this time as the usage position 1. Step 8: Extract the top, bottom, front, and back points of the left eye ellipse as reference points in sequence, and repeat steps 6-7 to obtain the usage positions of the posterior retina 2-5. Step 9: Extract the rightmost, topmost, bottommost, frontmost, and backmost points of the right eye ellipse as reference points for the field of vision. Repeat steps 6-7 to obtain the usage positions of the posterior retina 6-10. Step 10: Extract the usage positions of 10 rearview mirrors to determine the actual usage positions of the interior rearview mirrors for drivers of different heights and sizes. Step 11: Extract the original design position and 10 usage positions of the interior rearview mirror as layout output.

2. The method for arranging and verifying automotive rearview mirrors based on an eye ellipse model according to claim 1, characterized in that... In step 2, a horizontal tangent line is drawn at the upper end of the 95% eye ellipse, a straight line is drawn that is tangent to both the lower edge of the front end of the roof and the lower edge of the 95% eye ellipse, and the intersection line of the windshield and the Y0 plane is drawn. The area enclosed by these three lines is the suggested area for the placement of the interior rearview mirror. The interior rearview mirror is initially placed in this area.

3. The method for arranging and verifying automotive rearview mirrors based on an eye ellipse model according to claim 2, characterized in that... Step 3, obtaining the required field of vision, specifically involves: using the driver's seat R point as a reference, shifting upwards to obtain the driver's eye point; constructing a regulatory plane backwards from the driver's eye point; within this plane, constructing the intersection line between the unloaded ground and the regulatory plane; and selecting 10m on each side of the vehicle's longitudinal symmetrical plane from this intersection line as the standard required visual area line; taking the highest point of the interior rearview mirror surface and projecting it onto the regulatory plane along the direction of the unloaded ground line; drawing a straight line parallel to the visual area line through the projection point; and connecting this straight line segment with the two ends of the visual area line to form a rectangle. This area is the required field of vision.

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