Method and system for checking operation envelope of automobile rearview mirror and vehicle-mounted terminal

Abstract

The application discloses a kind of operation envelope checking method, system and vehicle terminal of automobile rearview mirror, and operation envelope checking method includes the following steps: obtaining the limit point parameter of driver eye ellipse, driver eye point information, the first azimuth parameter of automobile rearview mirror and the second azimuth parameter of rear window glass;According to driver eye point information, the first azimuth parameter and limit point parameter, determine the cone of vision;When the cone of vision and the second azimuth parameter meet the field of view range requirement of automobile rearview mirror, the first azimuth parameter is used as target azimuth parameter;Mirror body is rotated, to update the first azimuth parameter, until the rotation range of mirror body is traversed, according to all target azimuth parameters, determine the envelope of automobile rearview mirror.Due to the envelope of automobile rearview mirror being determined according to target azimuth parameter, better meet the field of view range requirement of automobile rearview mirror, the rotation range of mirror body is more appropriate, the envelope of automobile rearview mirror is made accurately, avoid the problem of too large or too small.

Description

Technical Field

[0001] This application relates to the field of automotive rearview mirror technology, specifically to an operational envelope verification method, system, and vehicle terminal for an automotive interior rearview mirror. Background Technology

[0002] The rearview mirror is a crucial functional component for drivers while driving, requiring it to meet requirements such as ergonomics, regulatory compliance, design aesthetics, and structural space constraints. During the design process, engineers need to create the rearview mirror's envelope based on regulations, structural space, and ergonomics, and input the design parameters to define its boundaries. Since different drivers have different heights and body types, their needs for adjusting the rearview mirror's position also vary. Insufficient precision in creating the rearview mirror's envelope—for example, making it too large or too small—will cause problems. Specifically, if the envelope is too large, it will encroach on the space for other components and the overall design; if the envelope is too small, it will cause interference between the rearview mirror and other components, failing to meet operational and rearward visibility requirements.

[0003] In the existing technology, the accuracy of the manufacturing of the rearview mirror envelope needs to be improved. Summary of the Invention

[0004] This application provides a method, system, and vehicle terminal for verifying the operating envelope of an automotive rearview mirror, in order to solve the technical problem that the accuracy of automotive rearview mirror envelope manufacturing needs to be improved in related technologies.

[0005] A first aspect of this application provides a method for verifying the operational envelope of a car rearview mirror, the car rearview mirror comprising: A base and a mirror body, the base being rotatably connected to the mirror body; the mirror body faces the rear windshield of the vehicle; The operation envelope verification method includes the following steps: Obtain the extreme point parameters of the driver's eye ellipse, the driver's eye point information, the first orientation parameters of the rearview mirror, and the second orientation parameters of the rear window. Based on the driver's eye point information, the first orientation parameter, and the limit point parameter, determine the visual cone corresponding to the first orientation parameter; When the viewing cone and the second orientation parameter meet the field of view requirements of the rearview mirror, the first orientation parameter corresponding to the viewing cone is taken as the target orientation parameter. The mirror body is rotated to update the first orientation parameter, and the step of determining the visual cone corresponding to the first orientation parameter based on the driver's eye point information, the first orientation parameter, and the limit point parameter is continued until the rotation range of the mirror body is traversed, and the envelope of the car rearview mirror is determined based on all the target orientation parameters.

[0006] Based on the above technical means, since the envelope of the car rearview mirror is determined according to the target orientation parameters, it better meets the field of view requirements of the car rearview mirror, the rotation range of the mirror body is more appropriate, and the manufacturing accuracy of the car rearview mirror envelope is higher, avoiding the problem of being too large or too small.

[0007] Optionally, the rearview mirror further includes a connector, the two ends of which are rotatably connected to the base and the mirror body, respectively; the first orientation parameter includes at least two of the following: position information of the mirror body's normal central axis, position information of the mirror body's length direction central axis, and position information of the mirror body's width direction central axis, as well as position information of the connector's central axis. The step of rotating the mirror body to update the first orientation parameter includes: Rotate the connector to update the position information of the connector's central axis, and update at least two of the following: the position information of the mirror body's normal central axis, the position information of the mirror body's length-direction central axis, and the position information of the mirror body's width-direction central axis; and / or Rotate the mirror body to update at least two of the following: the position information of the mirror body's normal central axis, the position information of the mirror body's length-direction central axis, and the position information of the mirror body's width-direction central axis.

[0008] According to the above-mentioned technical means, the first orientation parameter can be updated by rotating the connector or the mirror body, and the specific position information to be updated can be selected.

[0009] Optionally, the adjustment range of the position information of the central axis of the connector, the adjustment range of the position information of the normal central axis of the mirror body, the adjustment range of the position information of the central axis of the mirror body in the length direction, and the adjustment range of the position information of the central axis of the mirror body in the width direction constitute the rotation range of the mirror body.

[0010] Based on the aforementioned technical means, the rotation range of the mirror body is limited by the adjustment range of the connector and the mirror body.

[0011] Optionally, there are two driver eye point information, which are used to reflect the position of the driver's eyes; the midpoint between the two driver eye points is located above the seating reference point, and the line connecting the two driver eye points is perpendicular to the longitudinal reference plane of the vehicle.

[0012] Based on the aforementioned technical means, the position of the driver's eye point is determined by using the riding reference point and the longitudinal reference plane of the vehicle.

[0013] Optionally, the limit point parameters include: front limit point parameters, rear limit point parameters, left limit point parameters, right limit point parameters, upper limit point parameters, and lower limit point parameters; each limit point is located on the elliptical surface, and the driver's eye point is located at the center of the ellipse; the first orientation parameter also includes: edge position information of the mirror edge in the mirror body; The step of determining the visual cone corresponding to the first orientation parameter based on the driver's eye point information, the first orientation parameter, and the limit point parameter includes: Based on the driver eye point information corresponding to at least one driver eye point and the limit point parameters corresponding to all limit points, determine the position information of all limit points; The surface position information of the mirror in the mirror body is determined based on at least two of the position information of the mirror body's normal central axis, the position information of the mirror body's length direction central axis, and the position information of the mirror body's width direction central axis. Based on the position information of all limit points and the surface position information, determine the position information of the corresponding symmetrical point of each limit point; Based on the position information of all symmetrical points and the edge position information, the view cone corresponding to the first orientation parameter is determined.

[0014] Based on the above technical means, the symmetrical point of the limit point is determined first, and then the visual cone is formed, which makes it easier to obtain an accurate visual cone.

[0015] Optionally, the second orientation parameter includes: the position information of the visible boundary of the rear window; the field of view requirements of the rearview mirror include: the visible boundary of the rear window is located within the viewing cone, and the projection area of ​​the visible boundary of the rear window on the ground along the direction of the viewing cone meets preset requirements, wherein the preset requirements include: the distance between the projection area and the front boundary of the car and the driver's eye point is 58m-60m, and the width between the projection area and the left and right boundaries adjacent to the front boundary is 20.0m-20.2m.

[0016] Based on the aforementioned technical means, the field of view of automotive rearview mirrors must meet the requirements of the standards and have a wide range of applications.

[0017] Optionally, the mirror surface of the mirror body includes: an operating area and a non-operating area, wherein the operating area is located on one or both sides of the non-operating area; the projection area of ​​the visible boundary of the rear window on the mirror surface along the opposite direction of the viewing cone is located within the non-operating area; and / or the normal movement range of the mirror surface of the mirror body is within a preset range.

[0018] Based on the above technical means, the operating area and the range of normal movement of the mirror surface of the mirror body are both used as the spatial limiting envelope of the rearview mirror of the car, supplementing the envelope of the rearview mirror of the car.

[0019] A second aspect of this application provides an operation envelope verification system for a car rearview mirror, comprising: The automotive rearview mirror includes: A base and a mirror body, the base being rotatably connected to the mirror body; the mirror body faces the rear windshield of the vehicle; The operation envelope verification system includes: The acquisition module is used to acquire the extreme point parameters of the driver's eye ellipse, the driver's eye point information, the first orientation parameters of the rearview mirror and the second orientation parameters of the rear window. The determining module is used to determine the visual cone corresponding to the first orientation parameter based on the driver's eye point information, the first orientation parameter, and the limit point parameter; The target module is used to take the first orientation parameter corresponding to the viewing cone as the target orientation parameter when the second orientation parameter of the viewing cone and the rear window meets the field of view requirement of the rearview mirror. An envelope module is used to rotate the mirror body to update the first orientation parameter, and continue to execute the step of determining the visual cone corresponding to the first orientation parameter based on the driver's eye point information, the first orientation parameter, and the limit point parameter, until the rotation range of the mirror body is traversed, and the envelope of the rearview mirror is determined based on all the target orientation parameters.

[0020] Optionally, the rearview mirror further includes a connector, the two ends of which are rotatably connected to the base and the mirror body, respectively; the first orientation parameter includes at least two of the following: position information of the mirror body's normal central axis, position information of the mirror body's length direction central axis, and position information of the mirror body's width direction central axis, as well as position information of the connector's central axis. The envelope module is specifically used to rotate the connector to update the position information of the connector's central axis, and to update at least two of the position information of the mirror body's normal central axis, the position information of the mirror body's length direction central axis, and the position information of the mirror body's width direction central axis; and / or to rotate the mirror body to update at least two of the position information of the mirror body's normal central axis, the position information of the mirror body's length direction central axis, and the position information of the mirror body's width direction central axis.

[0021] Optionally, the adjustment range of the position information of the central axis of the connector, the adjustment range of the position information of the normal central axis of the mirror body, the adjustment range of the position information of the central axis of the mirror body in the length direction, and the adjustment range of the position information of the central axis of the mirror body in the width direction constitute the rotation range of the mirror body.

[0022] Optionally, there are two driver eye point information, which are used to reflect the position of the driver's eyes; the midpoint between the two driver eye points is located above the seating reference point, and the line connecting the two driver eye points is perpendicular to the longitudinal reference plane of the vehicle.

[0023] Optionally, the limit point parameters include: front limit point parameters, rear limit point parameters, left limit point parameters, right limit point parameters, upper limit point parameters, and lower limit point parameters; each limit point is located on the elliptical surface, and the driver's eye point is located at the center of the ellipse; the first orientation parameter also includes: edge position information of the mirror edge in the mirror body; The determining module is specifically used to determine the position information of all extreme points based on the driver's eye point information corresponding to at least one driver's eye point and the extreme point parameters corresponding to all extreme points; to determine the surface position information of the mirror surface in the mirror body based on at least two of the position information of the mirror body's normal central axis, the position information of the mirror body's length direction central axis, and the position information of the mirror body's width direction central axis; to determine the position information of the symmetrical point corresponding to each extreme point based on the position information of all extreme points and the surface position information; and to determine the viewing cone corresponding to the first orientation parameter based on the position information of all symmetrical points and the edge position information.

[0024] Optionally, the second orientation parameter includes: the position information of the visible boundary of the rear window; the field of view requirements of the rearview mirror include: the visible boundary of the rear window is located within the viewing cone, and the projection area of ​​the visible boundary of the rear window on the ground along the direction of the viewing cone meets preset requirements, wherein the preset requirements include: the distance between the projection area and the front boundary of the car and the driver's eye point is 58m-60m, and the width between the projection area and the left and right boundaries adjacent to the front boundary is 20.0m-20.2m.

[0025] Optionally, the mirror surface of the mirror body includes: an operating area and a non-operating area, wherein the operating area is located on one or both sides of the non-operating area; the projection area of ​​the visible boundary of the rear window on the mirror surface along the opposite direction of the viewing cone is located within the non-operating area; and / or the normal movement range of the mirror surface of the mirror body is within a preset range.

[0026] A third aspect of this application provides an in-vehicle terminal, including: a memory, a processor, and a computer program stored in the memory and executable on the processor. The processor executes the program to implement the operation envelope verification method for a rearview mirror as described in the above embodiments.

[0027] A fourth aspect of this application provides a vehicle, including: an operation envelope verification system for a rearview mirror as described in the above embodiments, or an in-vehicle terminal as described in the above embodiments.

[0028] The beneficial effects of this application are as follows: Since the envelope of the car interior rearview mirror is determined according to the target orientation parameters, it better meets the field of view requirements of the car interior rearview mirror, the rotation range of the mirror body is more appropriate, and the manufacturing accuracy of the car interior rearview mirror envelope is higher, avoiding the problem of being too large or too small. Attached Figure Description

[0029] Figure 1 This is a structural schematic diagram of a car interior rearview mirror provided according to an embodiment of this application; Figure 2 This is a flowchart of an operational envelope verification method for a car rearview mirror according to a specific embodiment of this application; Figure 3 This is a schematic diagram of the driver's eye ellipse according to a specific embodiment of this application; Figure 4 This is a schematic diagram of the structure of the mirror body according to a specific embodiment of this application; Figure 5 This is a schematic diagram of a view frustum according to a specific embodiment of this application; Figure 6 This is a schematic diagram of the sight cone and rear windshield according to a specific embodiment of this application; Figure 7 This is a schematic diagram illustrating the field of view requirements of a car rearview mirror according to a specific embodiment of this application; Figure 8 This is a schematic diagram of the operating area of ​​a specific embodiment of this application; Figure 9 This is a schematic diagram of the envelope of a car interior rearview mirror according to a specific embodiment of this application; Figure 10 This is a schematic diagram of the rear windshield of a specific embodiment of this application.

[0030] Wherein, 1-base; 2-mirror body; 21-mirror surface; 22-mirror surface edge; 3-connector; 41-central axis of connector; 42-normal central axis of mirror body; 43-central axis of mirror body in length direction; 44-central axis of mirror body in width direction; 50-extreme point; 51-left extreme point of left eye; 52-in frontal extreme point of left eye; 53-upper extreme point of left eye; 54-in frontal extreme point of right eye; 55-upper extreme point of right eye; 60-symmetry point; 70-visual cone; 71-driver's eye ellipse; 72-rear windshield; 73-driver's eye point. Detailed Implementation

[0031] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0032] Please also refer to Figure 1 and Figure 4 This application provides some embodiments of a car interior rearview mirror.

[0033] like Figure 1 and Figure 4 As shown, the rearview mirror of the automobile in this application includes: a base 1 and a mirror body 2, the base 1 and the mirror body 2 being rotatably connected; the mirror body 2 facing the rear windshield of the automobile.

[0034] Specifically, the interior rearview mirror is located inside the car and faces the rear of the vehicle, facilitating the driver's view of the area behind the car. Light from behind the car passes through the rear windshield, illuminates the mirror surface 21 of the mirror body 2, and is reflected into the driver's eyes. The base 1 is located inside the car, and the mirror body 2 is rotatably connected to the base 1. By adjusting the rotation of the mirror body 2, the orientation of the mirror surface 21 changes, resulting in different areas of the driver's view of the area behind the car. This allows different drivers to adjust the mirror body 2 according to their needs, thereby adjusting the area of ​​their observed field of view. The rear windshield is located near the rear of the car, and the mirror surface 21 of the mirror body 2 is usually facing the rear windshield and angled towards the driver so that light from behind the car can be reflected into the driver's eyes.

[0035] In one implementation of the embodiments of this application, such as Figure 1 and Figure 4 As shown, the car interior rearview mirror also includes a connector 3, the two ends of which are rotatably connected to the base 1 and the mirror body 2, respectively.

[0036] Specifically, the base 1 and the mirror body 2 can be rotatably connected by a connector 3. One end of the connector 3 is rotatably connected to the base 1, and the other end of the connector 3 is rotatably connected to the mirror body 2. This allows the mirror body 2 to change position in two dimensions, adapting to different drivers. Using the connector 3 to create two degrees of freedom for adjustment makes the adjustment more flexible.

[0037] In one implementation of the embodiments of this application, such as Figure 1 and Figure 4 As shown, a first column is provided on the base 1, and a first ball head is provided on the first column. A second column is provided on the mirror body 2, and a second ball head is provided on the second column. A first movable groove and a second movable groove are respectively provided at both ends of the connector 3. The first ball head is located in the first movable groove and can rotate within the first movable groove; the second ball head is located in the second movable groove and can rotate within the second movable groove.

[0038] Specifically, the position of the base 1 is usually fixed, while the connector 3 can rotate around the base 1, thus changing its position accordingly. For example, the connector 3 has a central axis 41, which points from one side of the base 1 to the other side of the mirror body 2. The position of the connector 3 can be represented by the central axis, for example, by using the central axis and each coordinate axis ( x , y , z The position of connector 3 can be represented by the angle between the three coordinate axes (or by the coordinates of the center of the connector). The mirror body 2 is typically rectangular or trapezoidal, and has a length direction, a width direction, and a normal direction. The length direction refers to the direction of the long side or base of the mirror surface, the width direction refers to the direction perpendicular to the long side or base within the mirror surface, and the normal direction refers to the direction perpendicular to the mirror surface. The mirror body 2 has a central axis 43 along its length, a central axis 44 along its width, and a central axis 42 along its normal direction. These three central axes intersect at a point. The orientation of the mirror body 2 is represented by two of these three central axes. For example, the orientation can be represented by the angle between the central axis 43 along its length and the central axis 44 along its width and the coordinate axes (or by the coordinates of the center of the mirror). x , y , z The angles between the three coordinate axes represent the direction and position of the mirror body 2. Specifically, the angles between the mirror body's length-direction central axis 43 and its normal-direction central axis 42 and each coordinate axis represent the direction and position of the mirror body 2. Similarly, the angles between the mirror body's width-direction central axis 44 and its normal-direction central axis 42 and each coordinate axis represent the direction and position of the mirror body 2. The surface containing the mirror body's length-direction central axis 43 and width-direction central axis 44 is the mirror surface 21, and its position can be determined based on these coordinate axes.

[0039] like Figures 2-8 As shown, based on any of the above embodiments of the automotive rearview mirror, embodiments of this application also provide a method for verifying the operational envelope of an automotive rearview mirror. For example... Figure 2 As shown, the operation envelope verification method includes the following steps: Step S100: Obtain the extreme point parameters of the driver's eye ellipse, the driver's eye point information, the first orientation parameters of the rearview mirror, and the second orientation parameters of the rear window.

[0040] Step S200: Determine the visual cone corresponding to the first orientation parameter based on the driver's eye point information, the first orientation parameter, and the limit point parameter.

[0041] Step S300: When the viewing cone and the second orientation parameter meet the field of view requirements of the rearview mirror, the first orientation parameter corresponding to the viewing cone is taken as the target orientation parameter.

[0042] Step S400: Rotate the mirror body to update the first orientation parameter, and continue to execute the step of determining the visual cone corresponding to the first orientation parameter based on the driver's eye point information, the first orientation parameter and the limit point parameter, until the rotation range of the mirror body is traversed, and the envelope of the car interior rearview mirror is determined based on all target orientation parameters.

[0043] Specifically, orientation parameters refer to parameters reflecting the direction and position of a component in space. The first orientation parameter refers to the parameter reflecting the direction and position of the rearview mirror inside the vehicle. The rearview mirror is installed inside the vehicle, and the driver should be able to adjust it from the driver's seat. Installation requirements for the rearview mirror can refer to standard GB 15084-2022 "Performance and Installation Requirements of Indirect Vision Devices for Motor Vehicles," for example, the ground clearance of the rearview mirror should be less than 1.8m. The second orientation parameter refers to the parameter reflecting the direction and position of the rear windshield. The extreme point parameter of the driver's eye ellipse is only the parameter of the relative position of the endpoints of the ellipse on the envelope of the driver's eye ellipse. The driver's eye ellipse is related to the geographical region to which the driver belongs, such as... Figure 3 As shown, the driver's eye ellipse can be created by referring to the standard SAE J 941-2010 Motor Vehicle Drivers' Eye Locations. When establishing the coordinate system, the front and rear directions of the vehicle are used as the coordinate system. x The axis is defined by the left and right sides of the car. y The axis is perpendicular to the direction of the car. z Axis. Driver's eye ellipse in x , y , zThe point with the maximum value on the three coordinate axes is the limit point 50. Therefore, there are 8 limit points 50 for the driver's eye ellipse: the front limit point, the rear limit point, the left limit point, the right limit point, the upper limit point, and the lower limit point. Since the driver has two eyes, a left eye and a right eye, there are two driver's eye ellipses: the driver's left eye ellipse and the driver's right eye ellipse. Therefore, there are 16 limit points: the left eye front limit point 52, the left eye rear limit point, the left eye left limit point 51, the left eye right limit point, the left eye upper limit point 53, the left eye lower limit point, the right eye front limit point 54, the right eye rear limit point, the right eye left limit point, the right eye right limit point, the right eye upper limit point 55, and the right eye lower limit point. Limit point parameters can be represented by the distance between two limit points. For example, limit point parameters include the distance between left and right limit points, the distance between upper and lower limit points, and the distance between front and rear limit points. Limit point parameters can also be represented by the distance from the center of the driver's eye ellipse. Limit point parameters include: front limit point parameter (i.e., the distance between the front limit point and the center), rear limit point parameter (i.e., the distance between the rear limit point and the center), left limit point parameter (i.e., the distance between the left limit point and the center), right limit point parameter (i.e., the distance between the right limit point and the center), upper limit point parameter (i.e., the distance between the upper limit point and the center), and lower limit point parameter (i.e., the distance between the lower limit point and the center). Driver eye point information refers to information reflecting the position of the driver's eyes. The driver's eye point is the driver's eye, located at the center of the driver's eye ellipse. Driver eye point information can be represented by the coordinates of the driver's eye point. Driver eye point information can be determined based on the seating reference point (i.e., point R). There are two driver eye point information points; the midpoint between the two driver eye points is located above the seating reference point, and the line connecting the two driver eye points is perpendicular to the longitudinal reference plane of the vehicle (i.e., the...). x shaft and z (The surface formed by the axis). The distance between the midpoint between the two driver eye points and the seating reference point is 500mm-750mm, and the distance between the two driver eye points is 50mm-75mm. The driver eye points and their information can be determined by referring to standard GB15084-2022 "Performance and Installation Requirements for Indirect Vision Devices in Motor Vehicles". For example, the driver's seat R point is 635mm vertically upwards, perpendicular to the vehicle's longitudinal reference plane, and 65mm apart. All extreme points are located on an elliptical surface, with the driver's eye point located at the center of the ellipse.

[0044] Once the car is assembled, the first orientation parameter, the second orientation parameter, the limit point parameter, and the driver's eye point information can be obtained. The first orientation parameter can be changed by adjusting the rearview mirror inside the car. The second orientation parameter is basically fixed. The limit point parameter of the driver's eye ellipse and the driver's eye point information are related to the driver and usually remain unchanged.

[0045] like Figure 5 As shown, the visual cone refers to the cone-shaped structure formed by light propagation when the driver's eyes pass through the mirror surface of the mirror. The visual cone under the first orientation parameter can be determined by the driver's eye point information, the first orientation parameter, and the limit point parameter. When the orientation of the rearview mirror inside the car is adjusted, the first orientation parameter changes, and the shape and position of the visual cone will also change accordingly.

[0046] Once the viewing cone under the first azimuth parameter is obtained, if the viewing cone and the second azimuth parameter meet the field of view requirements of the rearview mirror, the first azimuth parameter is used as the target azimuth parameter. If the viewing cone and the second azimuth parameter do not meet the field of view requirements of the rearview mirror, the first azimuth parameter is not used as the target azimuth parameter. Rotating the mirror body can change the first azimuth parameter, allowing for further determination of whether to use it as the target azimuth parameter. The mirror body has a rotation range (refer to standard GB 15084-2022 "Performance and Installation Requirements of Indirect Vision Devices for Motor Vehicles," for example, the angle between the mirror body and the longitudinal reference plane of the vehicle does not exceed 45°). By rotating the mirror body within a certain rotation range, and rotating it once at each position within that range, multiple target azimuth parameters can be obtained. Finally, the envelope of the rearview mirror is determined based on the target azimuth parameters, as detailed below. Figure 9 As shown. Because the envelope of the car rearview mirror is determined according to the target orientation parameters, it better meets the field of view requirements of the car rearview mirror, the rotation range of the mirror body is more appropriate, and the manufacturing accuracy of the car rearview mirror envelope is high, avoiding problems of being too large or too small.

[0047] like Figure 6 and Figure 10 As shown, the second orientation parameter includes the visible boundary position information of the rear windshield 72. The visible boundary of the rear windshield refers to the boundary of the area through which light can pass. Rear windshields are typically mounted on the C-pillar or D-pillar of a car. Not all light from behind the car can reach the mirror; the C-pillar or D-pillar blocks the light from behind the car. The light from behind reaches the mirror after passing through the visible area of ​​the rear windshield (i.e., the area through which light can pass). The visible boundary position information of the rear windshield can be represented by the coordinates of the vertices of the visible boundary. Since rear windshields are usually rectangular or trapezoidal, the visible boundary position information is represented by the coordinates of the vertices of the rectangle or trapezoid.

[0048] like Figure 6 and Figure 7As shown, the field of view requirements for a car rearview mirror include: the visible boundary of the rear windshield must be within the viewing cone, and the projected area of ​​the visible boundary of the rear windshield onto the ground along the direction of the viewing cone must meet preset requirements. These preset requirements include: the distance between the front boundary of the projection area facing the car and the driver's eye point must be 58m-60m, and the width between the projection area and the adjacent left and right boundaries of the front boundary must be 20.0m-20.2m. Typically, the viewing cone needs to cover the entire visible area of ​​the rear windshield, allowing the entire rear windshield area to be seen from the mirror. Furthermore, the area on the ground behind the car seen from the mirror (i.e., the projected area of ​​the visible boundary of the rear windshield onto the ground along the direction of the viewing cone) needs to be sufficiently large to meet the preset requirements. Figure 7 As shown, referring to standard GB 15084-2022 "Performance and Installation Requirements of Indirect Vision Devices for Motor Vehicles", the driver should be able to see an area on a horizontal road surface centered on the vehicle's longitudinal reference plane, with a width of at least 20m and extending to the horizon from 60m behind the driver's eye point. This application can be implemented in the same PART file of CATIA (Computer Aided Three-Dimensional Interaction Application System) software, and steps S100-S400 can be executed. The first orientation parameters of the rearview mirror, the second orientation parameters of the rear window, the limit point parameters of the driver's eye ellipse, and the driver's eye point information can be easily obtained and used to form a visual cone.

[0049] like Figure 4 As shown, the first orientation parameter also includes: edge position information of the mirror edge in the mirror body. The edge position information of the mirror edge in the mirror body refers to the position information of the edges of the shape formed by the mirror edge 22. The shape and size of the viewing cone are related to the shape, size, orientation, and position of the mirror in the mirror body; the larger the size of the mirror in the mirror body, the larger the size of the resulting viewing cone. To more easily determine the viewing cone, the first orientation parameter also includes edge position information of the mirror edge in the mirror body. Since the mirror in the mirror body is usually quadrilateral, such as a rectangle or trapezoid, the position information of the four sides of the quadrilateral can be used as the edge position information of the mirror edge 22 in the mirror body.

[0050] Step S200 specifically includes: Step S210: Determine the position information of all extreme points based on the driver eye point information corresponding to at least one driver eye point and the extreme point parameters corresponding to all extreme points.

[0051] Step S220: Determine the surface position information of the mirror in the mirror body based on at least two of the position information of the mirror body's normal central axis, the position information of the mirror body's length direction central axis, and the position information of the mirror body's width direction central axis.

[0052] Step S230: Based on the position information of all limit points and the surface position information, determine the position information of the corresponding symmetrical points of each limit point.

[0053] Step S240: Determine the view cone corresponding to the first orientation parameter based on the position information of all symmetrical points and the edge position information.

[0054] Specifically, the driver's field of vision can be monocular or binocular. When forming a visual cone, it can be either a monocular or binocular cone. If the monocular visual cone and its second azimuth parameter meet the field of vision requirements of the rearview mirror, then the first azimuth parameter corresponding to the monocular visual cone can be used as the target azimuth parameter. Alternatively, if both binocular visual cones and their second azimuth parameters meet the field of vision requirements of the rearview mirror, then the first azimuth parameter corresponding to both binocular visual cones can be used as the target azimuth parameter. Even if the monocular visual cone and its second azimuth parameter meet the field of vision requirements of the rearview mirror, it is possible that the visual cone and its second azimuth parameter of the other monocular may not meet the requirements.

[0055] Based on the driver's eye point information and the limit point parameters, the position information of the limit point can be determined. Since the limit point parameters reflect the relative positions between limit points, and the driver's eye point 73 is located at the center of the driver's eye ellipse 71, after determining the driver's eye point information (i.e., determining the position of the driver's eye point), the position information of the limit point can be determined. Based on at least two of the position information of the mirror body's normal central axis, the position information of the mirror body's length-direction central axis, and the position information of the mirror body's width-direction central axis, the surface position information of the mirror surface in the mirror body can be determined. The surface position information of the mirror surface refers to the position information of the surface on which the mirror surface is located. Based on the position information of the limit point and the surface position information, the symmetrical point 60 of the limit point 50 with respect to the mirror surface 21 can be determined (i.e., the symmetrical point 60 corresponding to the limit point 50, such as...). Figure 5 The position information (shown) is used. Based on the position information of the symmetrical point and the edge position information of the mirror edge, the visual cone 70 under the first orientation parameter is determined. Each driver's eye point corresponds to multiple limit points (specifically, up to 8 limit points), and each limit point corresponds to one symmetrical point. The edge position information of each symmetrical point 60 and the mirror edge can form a visual cone 70 corresponding to a limit point 50. The overlapping part of the visual cones corresponding to all limit points forms the visual cone under the first orientation parameter. When considering two driver's eye points, the number of limit points is greater, the number of visual cones corresponding to the limit points is greater, and the overlapping part of the visual cones corresponding to all limit points forms the visual cone under the first orientation parameter.

[0056] When creating a visual cone in the same part file of CATIA software, use the upper limit point of the right eye as the observation point, click the "Symmetry" command to create a symmetrical point between the upper limit point of the right eye ellipse and the output "mirror". Then click the "Extract" command to extract the mirror edge of the mirror body. Click the "Scale" command to scale the mirror edge using the mirror edge as an element and the upper limit point of the right eye as a reference point to form the end face of the visual cone. Connect the mirror edge and the end face of the visual cone using "Multi-section Surface" to form the visual cone of the upper limit point of the right eye. Visual cones of other limit points can be created using the "Replace" command.

[0057] Step S400 specifically includes: Step S410: Rotate the connector to update the position information of the connector's central axis, and update at least two of the following: the position information of the mirror body's normal central axis, the position information of the mirror body's length direction central axis, and the position information of the mirror body's width direction central axis.

[0058] Specifically, rotating the connector causes the mirror body to rotate as well. The positions of the connector and the mirror body change together, thus altering the position information of the connector's central axis. Furthermore, at least two of the following will change: the position information of the mirror body's normal central axis, the position information of the mirror body's length-direction central axis, and the position information of the mirror body's width-direction central axis. Since the connector rotates, the relative positions between the connector and the mirror body remain unchanged, and the mirror body also forms a rotational trajectory. Therefore, it is relatively easy to obtain updated position information for the mirror body's normal central axis, updated position information for the mirror body's length-direction central axis, and updated position information for the mirror body's width-direction central axis.

[0059] Step S400 specifically includes: Step S420: Rotate the mirror body to update at least two of the following: the position information of the mirror body's normal central axis, the position information of the mirror body's length direction central axis, and the position information of the mirror body's width direction central axis.

[0060] Specifically, when only the mirror body is rotated without changing the position of the connector, at least two of the following are updated: the position information of the mirror body's normal central axis, the position information of the mirror body's length direction central axis, and the position information of the mirror body's width direction central axis; the position information of the connector's central axis is not updated.

[0061] When rotating the connector and mirror body within the same CATIA software part file, click the "Axis System" command to establish a first rotation axis coordinate system with the center of the first ball joint as the origin and the center of gravity direction as the Z-coordinate direction. Click the "Axis System" command again to establish a second rotation axis coordinate system with the center of the second ball joint as the origin and the center of gravity direction as the Z-coordinate direction. Click the "Rotate" command to establish a second rotation axis coordinate system with the X-axis of the first rotation axis coordinate system as the rotation axis, and the second rotation axis coordinate system and the mirror surface as rotation elements. The second rotation axis coordinate system and the mirror surface are then rotated to update their corresponding position information. Click the "Rotate" command again to establish a second rotation axis coordinate system with the Z-axis of the first rotation axis coordinate system as the rotation axis, and the second rotation axis coordinate system and the mirror surface as rotation elements. The mirror surface is rotated to update its corresponding position information. Clicking the "Rotate" command rotates the mirror surface and the second axis coordinate system as rotation elements, using the Y-axis of the first axis coordinate system as the rotation axis. The mirror surface and the second axis coordinate system are then rotated to update their corresponding position information. Clicking the "Rotate" command rotates the mirror surface and the Z-axis of the second axis coordinate system as the rotation axis. The mirror surface and the mirror surface are then rotated to update their corresponding position information. Clicking the "Rotate" command rotates the mirror surface and the Y-axis of the second axis coordinate system as the rotation axis. The mirror surface and the mirror surface are then rotated to update their corresponding position information.

[0062] The adjustment ranges of the central axis positions of the connector, the mirror body's normal central axis, the mirror body's length-direction central axis, and the mirror body's width-direction central axis constitute the mirror body's rotation range. The connector has a certain adjustment space, forming the adjustment range for the central axis positions. The mirror surface also has a certain adjustment space, forming the adjustment ranges for the mirror body's normal central axis, the mirror body's length-direction central axis, and the mirror body's width-direction central axis. These adjustment ranges constitute the mirror body's rotation range.

[0063] like Figure 8As shown, the mirror surface includes an operating area and a non-operating area. The operating area is located on one or both sides of the non-operating area. The projection area of ​​the visible boundary of the rear windshield onto the mirror surface along the opposite direction of the visual cone is located within the non-operating area. The operating area refers to the area where the driver can manually rotate the mirror, and the non-operating area refers to the area where the driver cannot manually rotate the mirror. Typically, the mirror surface is relatively long. The operating area is configured in addition to the non-operating area, allowing the driver to manually operate the mirror. Rotating the mirror in the operating area does not affect the field of vision in the non-operating area. The positions of the non-operating and operating areas are not fixed. For example, if there is one non-operating area and one operating area, and the driver rotates the mirror by holding the left side, then the left side of the mirror is designated as the operating area, and the right side as the non-operating area; if the driver rotates the mirror by holding the right side, then the right side of the mirror is designated as the operating area, and the left side as the non-operating area. There can be two operating areas, located on either side of the non-operating area. The length of a single operating area can be 40mm-90mm, for example, the length of a single operating area is 40mm-50mm, or the length of a single operating area is 80mm-90mm.

[0064] The mirror surface of the mirror body moves along the normal direction within a preset range. Since the rotating component has rotational space, and the mirror body also has rotational space, the mirror surface of the mirror body also has a certain range of movement along the normal direction. For example, if the preset range is 18mm-24mm, the mirror surface's range of movement along the normal direction is within 18mm. The allowable manufacturing tolerance for the mirror surface along the normal direction is 8mm-12mm. Specifically, the operating area and the mirror surface's range of movement along the normal direction both constitute the spatial constraint envelope of the rearview mirror.

[0065] Based on the operation envelope verification method for a car rearview mirror according to any of the above embodiments, embodiments of this application also provide an operation envelope verification system for a car rearview mirror, the car rearview mirror including: The base and the mirror body are rotatably connected; the mirror body faces the rear windshield of the car. The operating envelope verification system includes: The acquisition module is used to acquire the extreme point parameters of the driver's eye ellipse, the driver's eye point information, the first position parameters of the rearview mirror, and the second position parameters of the rear window. The determination module is used to determine the visual cone corresponding to the first orientation parameter based on the driver's eye point information, the first orientation parameter, and the limit point parameter; The target module is used to take the first orientation parameter corresponding to the view cone as the target orientation parameter when the second orientation parameters of the view cone and the rear window meet the field of view requirements of the rearview mirror. The envelope module is used to rotate the mirror body to update the first orientation parameter, and continue to execute the step of determining the visual cone corresponding to the first orientation parameter based on the driver's eye point information, the first orientation parameter, and the limit point parameter, until the rotation range of the mirror body is traversed, and the envelope of the car interior rearview mirror is determined based on all target orientation parameters.

[0066] Based on the operation envelope verification method for automotive rearview mirrors according to any of the above embodiments, embodiments of this application also provide an in-vehicle terminal. The in-vehicle terminal may include: Memory, processor, and computer programs stored in memory and capable of running on the processor.

[0067] When the processor executes the program, it implements the operation envelope verification method for the automotive rearview mirror provided in the above embodiments.

[0068] Furthermore, the vehicle-mounted terminal also includes: A communication interface used for communication between the memory and the processor.

[0069] The memory may include high-speed RAM (Random Access Memory) memory, and may also include non-volatile memory, such as at least one disk storage device.

[0070] If the memory, processor, and communication interface are implemented independently, they can be interconnected via a bus to communicate with each other. The bus can be an ISA (Industry Standard Architecture) bus, a PCI (Peripheral Component Interconnect) bus, or an EISA (Extended Industry Standard Architecture) bus, etc. Buses can be categorized as address buses, data buses, control buses, etc.

[0071] Specifically, if the memory, processor, and communication interface are integrated on a single chip, then the memory, processor, and communication interface can communicate with each other through internal interfaces.

[0072] The processor may be a CPU (Central Processing Unit), an ASIC (Application Specific Integrated Circuit), or one or more integrated circuits configured to implement the embodiments of this application.

[0073] Furthermore, based on the automotive rearview mirror operation envelope verification system or the vehicle terminal of any of the above embodiments, embodiments of this application also propose a vehicle that includes the automotive rearview mirror operation envelope verification system or vehicle terminal of the above embodiments.

[0074] In the description of this specification, the references to terms such as "embodiment," "any embodiment," or "implementation" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or implementation is included in at least one embodiment or implementation of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or implementation. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or implementations. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or implementations described in this specification, as well as the features of different embodiments or implementations.

[0075] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature.

[0076] It should be understood that various parts of this application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (FPGAs), field-programmable gate arrays (FPGAs), etc.

[0077] Furthermore, the functional units in the various embodiments of this application can be integrated into a processing module, or each unit can exist physically separately, or two or more units can be integrated into a module. The integrated module can be implemented in hardware or as a software functional module. If the integrated module is implemented as a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium.

Claims

1. A method for verifying the operating envelope of a car rearview mirror, characterized in that, The automotive rearview mirror includes: A base and a mirror body, the base being rotatably connected to the mirror body; the mirror body faces the rear windshield of the vehicle; The operation envelope verification method includes the following steps: Obtain the extreme point parameters of the driver's eye ellipse, the driver's eye point information, the first orientation parameters of the rearview mirror, and the second orientation parameters of the rear window. Based on the driver's eye point information, the first orientation parameter, and the limit point parameter, determine the visual cone corresponding to the first orientation parameter; When the viewing cone and the second orientation parameter meet the field of view requirements of the rearview mirror, the first orientation parameter corresponding to the viewing cone is taken as the target orientation parameter. Rotate the mirror body to update the first orientation parameter, and continue to execute the step of determining the visual cone corresponding to the first orientation parameter based on the driver's eye point information, the first orientation parameter and the limit point parameter, until the rotation range of the mirror body is traversed, and the envelope of the car interior rearview mirror is determined based on all the target orientation parameters; The rearview mirror further includes: a connector, the two ends of which are rotatably connected to the base and the mirror body respectively; a first column is provided on the base, and a first ball head is provided on the first column; a second column is provided on the mirror body, and a second ball head is provided on the second column; a first movable groove and a second movable groove are provided at both ends of the connector respectively, the first ball head is located in the first movable groove and rotates within the first movable groove; the second ball head is located in the second movable groove and rotates within the second movable groove; the first orientation parameter includes at least two of the following: the position information of the mirror body's normal central axis, the position information of the mirror body's length direction central axis, and the position information of the mirror body's width direction central axis, as well as the position information of the connector's central axis. The step of rotating the mirror body to update the first orientation parameter includes: Rotate the connector to update the position information of the connector's central axis, and update at least two of the following: the position information of the mirror body's normal central axis, the position information of the mirror body's length-direction central axis, and the position information of the mirror body's width-direction central axis; and / or Rotate the mirror body to update at least two of the following: the position information of the mirror body's normal central axis, the position information of the mirror body's length-direction central axis, and the position information of the mirror body's width-direction central axis.

2. The method for verifying the operation envelope of a car rearview mirror according to claim 1, characterized in that, The adjustment range of the position information of the central axis of the connector, the adjustment range of the position information of the normal central axis of the mirror body, the adjustment range of the position information of the central axis of the mirror body in the length direction, and the adjustment range of the position information of the central axis of the mirror body in the width direction constitute the rotation range of the mirror body.

3. The method for verifying the operational envelope of a car rearview mirror according to claim 1, characterized in that, There are two driver eye point information, which are used to reflect the position of the driver's eyes; the midpoint between the two driver eye points is located above the seating reference point, and the line connecting the two driver eye points is perpendicular to the longitudinal reference plane of the vehicle.

4. The method for verifying the operation envelope of a car rearview mirror according to claim 3, characterized in that, The limit point parameters include: front limit point parameters, rear limit point parameters, left limit point parameters, right limit point parameters, upper limit point parameters, and lower limit point parameters; each limit point is located on the surface of an ellipse, and the driver's eye point is located at the center of the ellipse; the first orientation parameter also includes: edge position information of the mirror edge in the mirror body; The step of determining the visual cone corresponding to the first orientation parameter based on the driver's eye point information, the first orientation parameter, and the limit point parameter includes: Based on the driver eye point information corresponding to at least one driver eye point and the limit point parameters corresponding to all limit points, determine the position information of all limit points; The surface position information of the mirror in the mirror body is determined based on at least two of the position information of the mirror body's normal central axis, the position information of the mirror body's length direction central axis, and the position information of the mirror body's width direction central axis. Based on the position information of all limit points and the surface position information, determine the position information of the corresponding symmetrical point of each limit point; Based on the position information of all symmetrical points and the edge position information, the view cone corresponding to the first orientation parameter is determined.

5. The method for verifying the operational envelope of a car rearview mirror according to claim 4, characterized in that, The second orientation parameter includes: the position information of the visible boundary of the rear window; the field of view requirements of the rearview mirror include: the visible boundary of the rear window is located within the viewing cone, and the projection area of ​​the visible boundary of the rear window on the ground along the direction of the viewing cone meets preset requirements, wherein the preset requirements include: the distance between the projection area and the front boundary of the car and the driver's eye point is 58m-60m, and the width between the projection area and the left and right boundaries adjacent to the front boundary is 20.0m-20.2m.

6. The method for verifying the operational envelope of a car rearview mirror according to any one of claims 1-5, characterized in that, The mirror surface of the mirror body includes: an operating area and a non-operating area, wherein the operating area is located on one or both sides of the non-operating area; the projection area of ​​the visible boundary of the rear window on the mirror surface along the opposite direction of the viewing cone is located within the non-operating area; and / or The mirror surface of the mirror body moves within a preset range along the normal direction.

7. A system for verifying the operational envelope of a car rearview mirror, characterized in that, The automotive rearview mirror includes: A base and a mirror body, the base being rotatably connected to the mirror body; the mirror body faces the rear windshield of the vehicle; The operation envelope verification system includes: The acquisition module is used to acquire the extreme point parameters of the driver's eye ellipse, the driver's eye point information, the first orientation parameters of the rearview mirror and the second orientation parameters of the rear window. The determining module is used to determine the visual cone corresponding to the first orientation parameter based on the driver's eye point information, the first orientation parameter, and the limit point parameter; The target module is used to take the first orientation parameter corresponding to the viewing cone as the target orientation parameter when the second orientation parameter of the viewing cone and the rear window meets the field of view requirement of the rearview mirror. An envelope module is used to rotate the mirror body to update the first orientation parameter, and continue to execute the step of determining the visual cone corresponding to the first orientation parameter based on the driver's eye point information, the first orientation parameter and the limit point parameter, until the rotation range of the mirror body is traversed, and the envelope of the car rearview mirror is determined based on all the target orientation parameters. The rearview mirror further includes: a connector, the two ends of which are rotatably connected to the base and the mirror body respectively; a first column is provided on the base, and a first ball head is provided on the first column; a second column is provided on the mirror body, and a second ball head is provided on the second column; a first movable groove and a second movable groove are provided at both ends of the connector respectively, the first ball head is located in the first movable groove and rotates within the first movable groove; the second ball head is located in the second movable groove and rotates within the second movable groove; the first orientation parameter includes at least two of the following: the position information of the mirror body's normal central axis, the position information of the mirror body's length direction central axis, and the position information of the mirror body's width direction central axis, as well as the position information of the connector's central axis. The envelope module is used to rotate the connector to update the position information of the central axis of the connector, and to update at least two of the position information of the mirror body normal central axis, the position information of the mirror body length direction central axis, and the position information of the mirror body width direction central axis; and / or to rotate the mirror body to update at least two of the position information of the mirror body normal central axis, the position information of the mirror body length direction central axis, and the position information of the mirror body width direction central axis.

8. A vehicle-mounted terminal, characterized in that, include: The system includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the operational envelope verification method for a car interior rearview mirror as described in any one of claims 1-6.

9. A vehicle, characterized in that, include: The operation envelope verification system for a car rearview mirror as described in claim 7, or the vehicle terminal as described in claim 8.

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