Method and system for evaluating position of inside rear-view mirror of vehicle

Abstract

The invention belongs to the field of vehicles, and discloses a method and system for evaluating the position of a rearview mirror in a vehicle, and the method comprises the steps: obtaining a three-dimensional model of the vehicle; determining inner rearview mirror coordinates in the vehicle three-dimensional model and eye point coordinates of the driver model; position evaluation parameters are determined according to the inner rearview mirror coordinates and the eye point coordinates, and the position of the inner rearview mirror is evaluated based on the position evaluation parameters. According to the method, the coordinates of the inside rear-view mirror and the eye point coordinates of the driver model are determined, so that the evaluation process can be analyzed based on the geometric position relationship between the inside rear-view mirror and the driver model, and the influence of the physiological feature difference of different drivers on the use effect of the rear-view mirror is fully considered. Meanwhile, the position evaluation parameters are determined based on the coordinates and are evaluated, quantitative evaluation of the position of the inner rearview mirror is achieved, whether the position of the inner rearview mirror meets the ergonomics requirement or not can be judged objectively and accurately, and therefore a basis is provided for optimizing the position of the inner rearview mirror.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of vehicles, in particular to a method and system for evaluating the position of a rearview mirror in a vehicle. BACKGROUND

[0002] With the rapid development of the automotive industry, the safety performance of vehicles has become the primary consideration in the design and manufacturing process. Among numerous safety performance indicators, the position design of the interior rearview mirror is crucial for the safety and comfort of the driver. The traditional design method mainly relies on fixed human body models, such as eye ellipse models based on the 95th percentile of the human body, to determine the approximate position of the interior rearview mirror. However, this design method has obvious limitations, mainly reflected in the inability to accurately adapt to the actual needs of drivers of different heights. The eye point positions of drivers of different heights vary significantly, and the existing design method fails to fully consider this key factor. This design method based on fixed human body models is difficult to meet the diverse ergonomics needs, resulting in poor human-machine matching of the interior rearview mirror position in actual use.

[0003] Therefore, how to accurately evaluate the rationality of the position of the interior rearview mirror in the vehicle is a technical problem to be solved by those skilled in the art. SUMMARY

[0004] In order to solve the problem that it is difficult to accurately evaluate the rationality of the position of the interior rearview mirror in the vehicle in the prior art, the present application provides a method and system for evaluating the position of the interior rearview mirror in a vehicle.

[0005] A method for evaluating the position of an interior rearview mirror in a vehicle, comprising:

[0006] obtaining a three-dimensional model of the vehicle;

[0007] determining the coordinates of the interior rearview mirror and the eye point coordinates of the driver model in the three-dimensional model of the vehicle;

[0008] determining a position evaluation parameter based on the coordinates of the interior rearview mirror and the eye point coordinates, and evaluating the position of the interior rearview mirror based on the position evaluation parameter.

[0009] Optionally, the position evaluation parameter includes a driver viewing angle.

[0010] The evaluation of the position of the interior rearview mirror based on the position evaluation parameter comprises:

[0011] if the driver viewing angle is less than a first threshold value, determining that the angle evaluation of the interior rearview mirror is level one;

[0012] if the driver viewing angle is greater than the first threshold value and less than a second threshold value, determining that the angle evaluation of the interior rearview mirror is level two;

[0013] If the driver viewing angle is greater than the second threshold value, it is determined that the angle evaluation level of the interior rearview mirror is level three.

[0014] Optionally, the driver viewing angle includes an elevation angle and a horizontal rotation angle; the elevation angle is an angle between a line connecting an eye point of the driver model and a rotation center of the interior rearview mirror and a line of sight directly in front of the eye point of the driver model, projected on a first plane; the first plane is a plane perpendicular to a horizontal plane in which the line of sight directly in front of the eye point of the driver model is located; the horizontal rotation angle is an angle between the line connecting the eye point of the driver model and the rotation center of the interior rearview mirror and the line of sight directly in front of the eye point of the driver model, projected on a second plane; the second plane is the horizontal plane;

[0015] If the driver viewing angle is less than a first threshold value, it is determined that the angle evaluation level of the interior rearview mirror is level one, including:

[0016] If the elevation angle and the horizontal rotation angle are both less than the first threshold value, it is determined that the angle evaluation level of the interior rearview mirror is level one;

[0017] If the driver viewing angle is greater than the first threshold value and less than a second threshold value, it is determined that the angle evaluation level of the interior rearview mirror is level two, including:

[0018] If the elevation angle and the horizontal rotation angle are both less than the second threshold value, if the elevation angle is greater than the first threshold value and / or the horizontal rotation angle is greater than the first threshold value, it is determined that the angle evaluation level of the interior rearview mirror is level two;

[0019] If the driver viewing angle is greater than the second threshold value, it is determined that the angle evaluation level of the interior rearview mirror is level three, including:

[0020] If the elevation angle is greater than the second threshold value and / or the horizontal rotation angle is greater than the second threshold value, it is determined that the angle evaluation level of the interior rearview mirror is level three.

[0021] Optionally, after it is determined that the angle evaluation level of the interior rearview mirror is level three, the method further includes:

[0022] When the elevation angle is greater than the second threshold value, the interior rearview mirror in the three-dimensional model of the vehicle is moved downward by a first preset distance, and the first preset distance satisfies formula (1):

[0023] ΔZ = Z1 - Z2 - (X2 - X1) * tanα (1)

[0024] when the horizontal rotation angle is greater than the second threshold value, moving the inside rearview mirror in the three-dimensional model of the vehicle to the left by a second preset distance, the second preset distance satisfying formula (2):

[0025] ΔY=Y1-Y2-(X2-X1)*tanα (2)

[0026] wherein ΔZ is the first preset distance, Z1 is the vertical coordinate of the rotation center of the inside rearview mirror, Z2 is the vertical coordinate of the eye point of the driver, X1 is the horizontal coordinate of the rotation center of the inside rearview mirror, X2 is the horizontal coordinate of the eye point of the driver, α is the second threshold value, ΔY is the second preset distance, Y1 is the longitudinal coordinate of the rotation center of the inside rearview mirror, and Y2 is the longitudinal coordinate of the eye point of the driver.

[0027] Optionally, the position evaluation parameter further comprises a driver viewing distance; the driver viewing distance is a straight-line distance between the eye point of the driver model and the rotation center of the inside rearview mirror.

[0028] The evaluation of the position of the inside rearview mirror based on the position evaluation parameter comprises:

[0029] if the driver viewing distance is within a preset interval, determining that the distance evaluation of the inside rearview mirror is level one;

[0030] if the driver viewing distance is outside the preset interval, determining that the distance evaluation of the inside rearview mirror is level two.

[0031] Optionally, after determining that the distance evaluation level of the inside rearview mirror is level two, the method further comprises:

[0032] changing the inside rearview mirror coordinate in the three-dimensional model of the vehicle according to a preset rule; the changed inside rearview mirror coordinate satisfies that a driver viewing angle determined based on the changed inside rearview mirror coordinate is less than the second threshold value, and a driver viewing distance determined based on the changed inside rearview mirror coordinate is within the preset interval.

[0033] Optionally, the determination of the position evaluation parameter according to the inside rearview mirror coordinate and the eye point coordinate comprises:

[0034] determination of an elevation angle, a horizontal rotation angle and a driver viewing distance according to the inside rearview mirror coordinate and the eye point coordinate.

[0035] The elevation angle is an angle between a line connecting the eye point of the driver model and the rotation center of the interior rearview mirror and a line of sight directly in front of the eye point of the driver model, projected on a first plane; the first plane is a plane perpendicular to a horizontal plane in which the line of sight directly in front of the eye point of the driver model is located; the horizontal rotation angle is an angle between the line connecting the eye point of the driver model and the rotation center of the interior rearview mirror and the line of sight directly in front of the eye point of the driver model, projected on a second plane; the second plane is a horizontal plane; and the driver viewing distance is a straight-line distance between the eye point of the driver model and the rotation center of the interior rearview mirror.

[0036] Optionally, the elevation angle satisfies formula (3):

[0037]

[0038] The horizontal rotation angle satisfies formula (4):

[0039]

[0040] The driver viewing distance satisfies formula (5):

[0041]

[0042] In formula (5), β is the elevation angle, Z1 is a vertical coordinate of the rotation center of the interior rearview mirror, X1 is a horizontal coordinate of the rotation center of the interior rearview mirror, Z2 is a vertical coordinate of the eye point of the driver model, X2 is a horizontal coordinate of the eye point of the driver model, γ is the horizontal rotation angle, Y1 is a longitudinal coordinate of the rotation center of the interior rearview mirror, Y2 is a longitudinal coordinate of the eye point of the driver model, and B is the driver viewing distance.

[0043] Optionally, the determination of the coordinates of the interior rearview mirror and the eye point of the driver model in the three-dimensional model of the vehicle comprises the following steps.

[0044] Obtaining a driver model height and a driver seat parameter;

[0045] Determining an eye point included angle according to the driver seat parameter and determining a torso distance according to the driver model height; the eye point included angle is an angle between a line connecting the eye point of the driver model and a crotch point and a plumb line of the eye point; and the torso distance is a distance between the eye point of the driver model and the crotch point.

[0046] Determining the eye point coordinates according to the eye point included angle, the torso distance, the driver model height and the driver seat parameter.

[0047] Optionally, the driver seat parameter comprises a crotch point coordinate and a seat horizontal adjustment stroke.

[0048] The determining of the eyepoint coordinates according to the eyepoint angle, the torso distance, the height of the driver model and the driving position parameters includes:

[0049] The eye point coordinates are determined according to the eye point angle, the torso distance, the height of the driver model, the hip point coordinates, and the seat horizontal adjustment stroke. The eye point coordinates satisfy formula (6):

[0050]

[0051] Among them, X0 is the horizontal coordinate of the hip point, Y0 is the vertical coordinate of the hip point, Z0 is the vertical coordinate of the hip point, X2 is the horizontal coordinate of the eye point, Y2 is the vertical coordinate of the eye point, Z2 is the vertical coordinate of the eye point, A26 is the eye point angle, D is the torso distance, L is the seat adjustment stroke, and α is the adjustment constant.

[0052] The method for evaluating the position of a vehicle's interior rearview mirror, provided in an embodiment of the present invention, comprises obtaining a three-dimensional vehicle model; determining the interior rearview mirror coordinates and the eyepoint coordinates of a driver model within the three-dimensional vehicle model; determining position evaluation parameters based on the interior rearview mirror coordinates and the eyepoint coordinates; and evaluating the interior rearview mirror position based on the position evaluation parameters. The present invention simulates the geometric structure and layout of a real vehicle in a virtual environment through the three-dimensional vehicle model. By determining the interior rearview mirror coordinates and the eyepoint coordinates of the driver model, the evaluation process can be analyzed based on the geometric positional relationship between the interior rearview mirror and the driver model, fully considering the impact of different drivers' physiological characteristics on the use of the rearview mirror. Furthermore, by determining and evaluating the position evaluation parameters based on the coordinates, a quantitative assessment of the interior rearview mirror position is achieved, enabling an objective and accurate determination of whether the interior rearview mirror position meets ergonomic requirements, thereby providing a basis for optimizing the interior rearview mirror position. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0054] Figure 1 A flow chart of a method for evaluating the position of a vehicle interior rearview mirror provided by an embodiment of the present invention;

[0055] Figure 2 for Figure 1 A flowchart of a practical embodiment of S03 in a method for evaluating the position of a rearview mirror inside a vehicle is provided;

[0056] Figure 3 for Figure 1Another actual manifestation mode of S03 in the method for evaluating the position of the rearview mirror in the vehicle provided in the present application is shown in the flow chart of Fig. 2;

[0057] Figure 4 Fig. 1 is a schematic diagram of an eye point angle provided in an embodiment of the present application; Figure 1 Another actual manifestation mode of S02 in the method for evaluating the position of the rearview mirror in the vehicle provided in the present application is shown in the flow chart of Fig. 1;

[0058] Figure 5 Fig. 1 is a schematic diagram of an eye point angle provided in an embodiment of the present application;

[0059] Figure 6 Fig. 1 is a schematic diagram of an eye point angle provided in an embodiment of the present application; DETAILED DESCRIPTION

[0060] In order to better understand the technical solutions of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0061] It should be clear that the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0062] The terms used in the embodiments of the present application are only for the purpose of describing the specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0063] It should be understood that the term "and / or" used herein is only to describe the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are in an "or" relationship.

[0064] With the rapid development of the automobile industry, the safety performance of vehicles has become the primary consideration in the design and manufacturing process. Among many safety performance indicators, the driver's field of view is one of the key factors affecting driving safety. Good forward visibility can significantly improve the driver's perception of road conditions, thereby reducing the occurrence of traffic accidents.

[0065] With the rapid development of the automotive industry, the safety performance of vehicles has become the primary consideration in the design and manufacturing process. Among the many safety performance indicators, the position design of the interior rearview mirror is crucial for the safety and comfort of the driver. The traditional design method mainly relies on fixed human body models, such as the eye ellipse model based on the 95th percentile of the human body, to determine the approximate position of the interior rearview mirror. However, this design method has obvious limitations, mainly reflected in the inability to accurately adapt to the actual needs of drivers of different heights. The eye point positions of drivers of different heights vary significantly, and the existing design method fails to fully consider this key factor. This design method based on fixed human body models is difficult to meet the diverse ergonomics requirements, leading to the problem of poor human-machine matching of the interior rearview mirror position in actual use. Therefore, the present application provides a method for evaluating the position of the interior rearview mirror of a vehicle to solve the above problems.

[0066] Please refer to Figure 1 The flowchart of the method for evaluating the position of the interior rearview mirror of a vehicle provided by the embodiments of the present application includes the following steps:

[0067] Step S01: Obtain a three-dimensional model of the vehicle.

[0068] In this embodiment, the three-dimensional model of the vehicle is created in advance using three-dimensional modeling software, which can provide a detailed digital representation of the shapes, structures, and spatial positions of various parts of the vehicle. The three-dimensional model of the vehicle reflects the spatial structure of the vehicle after actual manufacturing, including the relative positions and geometric shapes of key components such as the interior rearview mirror, seat, steering wheel, etc., so that designers and engineers can analyze, evaluate, and modify the vehicle in a virtual environment.

[0069] In some embodiments, three-dimensional laser scanning technology can be used to scan the actual vehicle or a clay model to obtain a large amount of point cloud data, which is then processed and reconstructed by professional software to generate a three-dimensional model. Alternatively, based on the design drawings and parameters of the vehicle, the designer can use various modeling tools in the three-dimensional modeling software to draw each component of the vehicle according to the design dimensions and structural requirements of the vehicle, and assemble them into a complete three-dimensional model.

[0070] Step S02: Determine the coordinates of the interior rearview mirror and the eye point coordinates of the driver model in the three-dimensional model of the vehicle.

[0071] In this embodiment, the interior rearview mirror coordinates include the three-dimensional coordinates of its rotation center, which can clearly indicate its installation position inside the vehicle; the eye point coordinates refer to the specific numerical values of the driver model's eye position in the vehicle coordinate system, both of which are key references for subsequent evaluation of the interior rearview mirror position.

[0072] By determining the inside rearview mirror coordinates and the eye point coordinates, the corresponding position evaluation parameters can be further determined, and then the position of the inside rearview mirror is evaluated whether it meets the ergonomic requirements and whether it can meet the comfort and safety of different height drivers watching the rear view. At the same time, based on the accurate coordinate position, the use effect of the inside rearview mirror in different driving scenarios can be simulated, potential problems can be found in advance and optimized, repeated modification in the actual manufacturing process can be avoided, design efficiency and quality can be improved, and research and development cost can be reduced.

[0073] In some embodiments, the three-dimensional coordinates of the inside rearview mirror rotation center can be directly obtained by the measurement tool in the three-dimensional modeling software. The eye point coordinates of the driver model can be determined in combination with the ergonomic data and the seat adjustment parameters, and the eye point coordinates of different height driver models are different.

[0074] In step S03, the position evaluation parameters are determined according to the inside rearview mirror coordinates and the eye point coordinates, and the position of the inside rearview mirror is evaluated based on the position evaluation parameters.

[0075] In this embodiment, the position evaluation parameters can quantify the spatial relationship between the position of the inside rearview mirror and the eye point of the driver, thereby providing an objective evaluation basis for the rationality of the position of the inside rearview mirror. For example, the position evaluation parameters can include the driver viewing angle and the driver viewing distance, which can reflect the comfort and convenience of the driver watching the inside rearview mirror from different aspects. Based on the evaluation of these parameters, it can be judged whether the position of the inside rearview mirror meets the ergonomic requirements and whether it can meet the use requirements of drivers of different heights.

[0076] By determining the position evaluation parameters and evaluating them, the rationality of the position of the inside rearview mirror can be scientifically evaluated. Only by accurately calculating the evaluation parameters and evaluating the position of the inside rearview mirror based on them, can it be ensured that the position of the inside rearview mirror meets the ergonomic principles and meets the comfort and safety requirements of drivers of different heights. This data-based evaluation method can avoid the error of subjective judgment and provide reliable data support for the optimization of the position of the inside rearview mirror.

[0077] Based on the above technical solution, an embodiment of the present invention provides a method for evaluating the position of a vehicle interior rearview mirror. The method comprises obtaining a three-dimensional vehicle model; determining the coordinates of the interior rearview mirror and the eyepoint coordinates of a driver model within the three-dimensional vehicle model; determining position evaluation parameters based on the interior rearview mirror coordinates and the eyepoint coordinates; and evaluating the position of the interior rearview mirror based on the position evaluation parameters. The present invention simulates the geometric structure and layout of a real vehicle in a virtual environment through the three-dimensional vehicle model. By determining the coordinates of the interior rearview mirror and the eyepoint coordinates of the driver model, the evaluation process is analyzed based on the geometric positional relationship between the interior rearview mirror and the driver model, fully considering the impact of different drivers' physiological characteristics on the performance of the rearview mirror. Furthermore, by determining and evaluating the position evaluation parameters based on the coordinates, a quantitative assessment of the interior rearview mirror position is achieved, enabling an objective and accurate determination of whether the interior rearview mirror position meets ergonomic requirements, thereby providing a basis for optimizing the interior rearview mirror position.

[0078] Please refer to Figure 2 ,for Figure 1 A flowchart of a practical expression of S03 in a method for evaluating the position of a rearview mirror inside a vehicle is provided.

[0079] Based on the above embodiment, in some embodiments, the position evaluation parameter may include a driver's viewing angle;

[0080] On this basis, as mentioned in step S03, the position of the interior rearview mirror is evaluated based on the position evaluation parameters, which may specifically include the following: Figure 2 Steps shown:

[0081] Step S11: If the driver's viewing angle is less than a first threshold, the angle evaluation of the interior rearview mirror is determined to be level one.

[0082] In this embodiment, the driver's viewing angle is the angle between the line connecting the driver's eyepoint and the rearview mirror's rotation center, and the line of sight directly in front of the driver's eyepoint. This angle comprehensively reflects the extent of the driver's head and eye movement when viewing the rearview mirror. The driver's viewing angle is compared with a preset first threshold to determine the comfort level of the rearview mirror position. If the angle is less than the first threshold, it indicates that the rearview mirror position is within a relatively ideal range, allowing the driver to view the rearview mirror in a relatively comfortable and natural posture. Therefore, the rearview mirror angle rating is determined to be level one.

[0083] Ergonomic research shows that when the driver's viewing angle is small, the rotation amplitude of the neck and eyeball is relatively small when the driver observes the interior rearview mirror, which can effectively reduce the fatigue during driving, and also helps to improve the driver's ability to quickly capture the road conditions behind, thereby enhancing the safety of driving. By setting a clear first threshold and defining the case where the viewing angle is lower than the threshold as a first level of evaluation, a clear and quantitative design target can be provided for car designers to help them optimize the installation position of the interior rearview mirror and ensure that it can meet the needs of most drivers for comfort and safety.

[0084] In some embodiments, the driver's viewing angle can include an elevation angle and a horizontal rotation angle; the elevation angle is the included angle between the line connecting the eye point of the driver model and the rotation center of the interior rearview mirror and the line of sight directly in front of the eye point of the driver model, projected on the first plane; the first plane is a plane perpendicular to the horizontal plane in which the line of sight directly in front of the eye point of the driver model lies; the horizontal rotation angle is the included angle between the line connecting the eye point of the driver model and the rotation center of the interior rearview mirror and the line of sight directly in front of the eye point of the driver model, projected on the second plane; the second plane is the horizontal plane;

[0085] On this basis, if the driver's viewing angle is less than the first threshold, the angle evaluation of the interior rearview mirror is determined to be level one, which can be specifically:

[0086] If both the elevation angle and the horizontal rotation angle are less than the first threshold, the angle evaluation level of the interior rearview mirror is determined to be level one.

[0087] In this embodiment, the elevation angle is the included angle between the line connecting the eye point of the driver model and the rotation center of the interior rearview mirror and the line of sight directly in front of the eye point of the driver model, projected on the first plane, which can be obtained by calculating the ratio of the vertical height difference between the eye point coordinates and the rotation center coordinates of the interior rearview mirror to the horizontal distance. For example, the elevation angle satisfies formula (3):

[0088]

[0089] Where β is the elevation angle, Z1 is the vertical coordinate of the rotation center of the interior rearview mirror, X1 is the horizontal coordinate of the rotation center of the interior rearview mirror, Z2 is the vertical coordinate of the driver's eye point, and X2 is the horizontal coordinate of the driver's eye point.

[0090] The horizontal rotation angle is the included angle between the line connecting the eye point of the driver model and the rotation center of the interior rearview mirror and the line of sight directly in front of the eye point of the driver model, projected on the second plane, which can be calculated by the projection position relationship between the eye point coordinates and the rotation center coordinates of the interior rearview mirror on the horizontal plane. For example, the horizontal rotation angle satisfies formula (4):

[0091]

[0092] wherein γ is the horizontal rotation angle, Y1 is the longitudinal coordinate of the inner rearview mirror rotation center, X1 is the lateral coordinate of the inner rearview mirror rotation center, Y2 is the longitudinal coordinate of the driver eye point, and X2 is the lateral coordinate of the driver eye point.

[0093] For example, when the elevation angle β < 15° and the horizontal rotation angle γ < 15°, it is determined that the angle evaluation level of the inner rearview mirror is level one, i.e., in a comfortable excellent state.

[0094] In the embodiment, when the elevation angle and the horizontal rotation angle of the inner rearview mirror viewed by the driver are both less than the first threshold value, it indicates that the rotation amplitudes of the head and the eyeball of the driver are both minimized and most natural when the driver views the inner rearview mirror, at this time, the position of the inner rearview mirror is consistent with the line of sight of the driver, and the best viewing comfort and convenience can be provided for the driver, and therefore, the angle evaluation level of the inner rearview mirror is determined to be level one, which is an ideal matching state and represents the optimal target of the position design of the inner rearview mirror.

[0095] In step S12, if the driver viewing angle is greater than the first threshold value and less than the second threshold value, it is determined that the angle evaluation level of the inner rearview mirror is level two.

[0096] In the embodiment, when the driver viewing angle exceeds the first threshold value but does not reach the second threshold value, it indicates that the position of the inner rearview mirror cannot reach the best comfort requirement, but is still acceptable to a certain extent. At this time, the angle evaluation level thereof is determined to be level two, which means that the position of the inner rearview mirror is in a medium reasonable degree, reminding the designer that the position is not obviously problematic, but still has room for improvement to improve the viewing comfort of the driver.

[0097] The setting of the level two evaluation can effectively distinguish different levels of reasonableness and comfort of the position of the inner rearview mirror, help the designer more accurately identify the component position that needs to be optimized, and ensure that the designed vehicle can meet the basic use requirements.

[0098] In some embodiments, in step S12, if the driver viewing angle is greater than the first threshold value and less than the second threshold value, it is determined that the angle evaluation level of the inner rearview mirror is level two, which can be specifically:

[0099] When the elevation angle and the horizontal rotation angle are both less than the second threshold value, if the elevation angle is greater than the first threshold value, and / or the horizontal rotation angle is greater than the first threshold value, it is determined that the angle evaluation level of the inner rearview mirror is level two.

[0100] For example, when the elevation angle β < 15° and the horizontal rotation angle γ < 15°, if β > 30° and / or γ > 30°, it is determined that the angle evaluation level of the inner rearview mirror is level two, i.e., in a comfort qualified state.

[0101] In the embodiment, when the elevation angle and the horizontal rotation angle of the inner rearview mirror are both less than the second threshold value, but one of them is greater than the first threshold value, it indicates that the position of the inner rearview mirror is still deviated from the optimal position, and the angle evaluation level of the inner rearview mirror is determined as level two to remind the designer to make improvements.

[0102] In step S13, if the driver viewing angle is greater than the second threshold value, the angle evaluation level of the inner rearview mirror is determined as level three.

[0103] In the embodiment, when the driver viewing angle is greater than the second threshold value, it indicates that the angle between the position of the inner rearview mirror and the eye point of the driver is already large, which is in an unreasonable range. At this time, the driver needs a large head or eye rotation amplitude when watching the inner rearview mirror, which may affect the comfort and safety of driving. Therefore, the angle evaluation level of the inner rearview mirror is determined as level three to remind the designer that there is a significant problem in this position and it needs to be optimized and adjusted to avoid unnecessary disturbance and risk to the driver.

[0104] The large viewing angle will make the driver in an awkward position when observing the rearview mirror, which is easy to cause neck fatigue and visual discomfort, and even may cause the driver to be distracted when frequently observing the rearview mirror, thereby increasing the probability of traffic accidents. Setting the level three evaluation can clearly distinguish the unreasonable position of the inner rearview mirror, so that the designer can quickly identify the part that needs to be improved.

[0105] In some embodiments, if the driver viewing angle is greater than the second threshold value, the angle evaluation level of the inner rearview mirror is determined as level three, which can be specifically:

[0106] If the elevation angle is greater than the second threshold value, and / or the horizontal rotation angle is greater than the second threshold value, the angle evaluation level of the inner rearview mirror is determined as level three.

[0107] For example, if the elevation angle β > 30° and / or the horizontal rotation angle γ > 30°, the angle evaluation level of the inner rearview mirror is determined as level three, i.e. in the comfort unqualified state.

[0108] In the embodiment, when at least one of the elevation angle or the horizontal rotation angle of the inner rearview mirror is greater than the second threshold value, it indicates that the angle between the position of the inner rearview mirror and the line of sight of the driver is too large. At this time, the driver needs to rotate the head or eyes greatly when watching the rearview mirror, which is in an awkward position. In this case, the position of the inner rearview mirror cannot meet the basic comfort and safety requirements, and therefore the angle evaluation level is determined as level three to alert the designer that there is a significant problem in this position and it needs to be optimized and adjusted.

[0109] On the basis of the above embodiments, in some embodiments, in order to make timely correction for the obvious problem of the interior rearview mirror position, ensure that its position meets the ergonomic requirements, and also introduce an angle optimization strategy and execute it to improve the interior rearview mirror position, improve the efficiency and instructions of automobile design, and shorten the research and development cycle. That is, after determining that the angle evaluation level of the interior rearview mirror is three, the following steps can also be executed:

[0110] When the vertical angle is greater than the second threshold value, the interior rearview mirror in the three-dimensional model of the vehicle is moved downward by a first preset distance, and the first preset distance satisfies formula (1):

[0111] ΔZ = Z1-Z2-(X2-X1)*tan a (1)

[0112] When the horizontal rotation angle is greater than the second threshold value, the interior rearview mirror in the three-dimensional model of the vehicle is moved leftward by a second preset distance, and the second preset distance satisfies formula (2):

[0113] ΔY = Y1-Y2-(X2-X1)*tan a (2)

[0114] Wherein, ΔZ is the first preset distance, Z1 is the vertical coordinate of the rearview mirror rotation center, Z2 is the vertical coordinate of the driver's eye point, X1 is the horizontal coordinate of the interior rearview mirror rotation center, X2 is the horizontal coordinate of the driver's eye point, a is the second threshold value, ΔY is the second preset distance, Y1 is the longitudinal coordinate of the interior rearview mirror rotation center, and Y2 is the longitudinal coordinate of the driver's eye point.

[0115] When the position evaluation level of the interior rearview mirror is three, it means that the position is obviously unreasonable, which may cause the driver to have a large vertical angle or horizontal rotation angle when watching the rearview mirror, thereby affecting the comfort and safety of driving. Therefore, in order to solve this problem, the embodiment determines the corresponding adjustment strategy by analyzing the relationship between the vertical angle and the horizontal rotation angle and the second threshold value.

[0116] When the vertical angle is greater than the second threshold value, it proves that the rearview mirror position is too high, at this time the interior rearview mirror in the three-dimensional model of the vehicle is moved downward by a first preset distance, and the first preset distance is the moving distance of the interior rearview mirror that satisfies the vertical angle equal to the second threshold value in the position evaluation parameter, so that the height of the moved interior rearview mirror is more reasonable.

[0117] When the horizontal rotation angle is greater than the second threshold value, it proves that the rearview mirror position is too far to the right, at this time the interior rearview mirror in the three-dimensional model of the vehicle is moved leftward by a second preset distance, and the second preset distance is the moving distance of the interior rearview mirror that satisfies the horizontal rotation angle equal to the second threshold value in the position evaluation parameter, so that the position of the moved interior rearview mirror is closer to the driver's position.

[0118] In this embodiment, the relative position relationship between the interior rearview mirror and the driver's eye point is improved through actual geometric position adjustment, thereby reducing the driver's viewing angle and improving driving comfort and safety.

[0119] Based on the above technical solution, the embodiment of the present invention can clearly quantify the rationality of the rearview mirror position, provide designers with an intuitive and specific evaluation basis, and make the design and optimization of the rearview mirror position more targeted and operational.

[0120] Please refer to Figure 3 ,for Figure 1 A flowchart of another practical expression of S03 in a method for evaluating the position of a rearview mirror inside a vehicle is provided.

[0121] Based on the above embodiment, in some embodiments, the position evaluation parameter may further include a driver viewing distance; the driver viewing distance is a straight-line distance between the eye point of the driver model and the rotation center of the interior rearview mirror;

[0122] On this basis, as mentioned in step S03, the position of the interior rearview mirror is evaluated based on the position evaluation parameters, which may specifically include the following: Figure 2 Steps shown:

[0123] Step S21 : If the driver's viewing distance is within a preset range, the distance evaluation of the interior rearview mirror is determined to be level one.

[0124] In this embodiment, the driver's viewing distance refers to the straight-line distance from the driver's eye point to the rotation center of the rearview mirror. This parameter reflects the driver's field of view when looking at the rearview mirror. For example, the driver's viewing distance satisfies formula (5):

[0125]

[0126] Among them, B is the driver's viewing distance, Y1 is the vertical coordinate of the interior rearview mirror's rotation center, X1 is the horizontal coordinate of the interior rearview mirror's rotation center, Z1 is the vertical coordinate of the rearview mirror's rotation center, Y2 is the vertical coordinate of the driver's eye point, X2 is the horizontal coordinate of the driver's eye point, and Z2 is the vertical coordinate of the driver's eye point.

[0127] The preset range is a reasonable range determined based on design specifications and ergonomic research, ensuring the driver can clearly and comfortably observe the image in the rearview mirror. When the driver's viewing distance is within this preset range, the rearview mirror is ideally positioned relative to the driver, providing a good field of view and visual comfort. Therefore, the rearview mirror is assigned a Level 1 distance rating, indicating that its position meets the optimal design requirements for distance.

[0128] For example, if the driver's viewing distance is within 560mm-720mm, the distance evaluation of the interior rearview mirror is determined to be level 1.

[0129] Too close or too far viewing distance will have an adverse effect on the driver. Too close viewing distance will narrow the driver's field of view and make it difficult to obtain complete rear information; while too far viewing distance may result in blurred images, affecting the accuracy of judgment of rear objects. Setting a preset interval as an evaluation standard can effectively ensure that the driver can obtain clear images and maintain a comfortable visual experience when observing the interior rearview mirror. This grading evaluation method based on viewing distance provides a clear design target for automobile designers, which helps to identify and correct potential problems in the design stage in advance, ensuring that the interior rearview mirror position can meet the needs of driving safety and comfort to the greatest extent.

[0130] Step S22, if the driver's viewing distance is outside the preset interval, the distance evaluation of the interior rearview mirror is determined to be level 2.

[0131] In this embodiment, when the straight-line distance from the driver's eye point to the center of rotation of the interior rearview mirror exceeds the preset reasonable interval, it indicates that the position relationship between the interior rearview mirror and the driver is not ideal, and the distance evaluation of the interior rearview mirror is determined to be level 2 at this time.

[0132] In some embodiments, to effectively adjust the driver's viewing distance to make it as close as possible to the preset interval, to improve the safety of vehicle design, the position of the interior rearview mirror in the vehicle three-dimensional model can also be optimized after determining that the distance evaluation of the interior rearview mirror is level 2, to improve the efficiency and quality of vehicle design and reduce subsequent modification costs. That is, after determining that the distance evaluation of the interior rearview mirror is level 2, the following steps can also be performed:

[0133] Change the coordinates of the interior rearview mirror in the vehicle three-dimensional model according to the preset rules; the changed interior rearview mirror coordinates satisfy that the driver's viewing angle determined based thereon is less than the second threshold value, and the driver's viewing distance determined based thereon is within the preset interval.

[0134] For example, the position of the interior rearview mirror can be first fine-tuned in the horizontal or vertical direction, and then the driver's viewing angle and distance are recalculated to determine whether the conditions are met. If not, continue to adjust until the appropriate position is found. During the change process, the vehicle three-dimensional model also needs to be updated in real time to ensure that all related geometric relationships and parameters remain consistent.

[0135] In this embodiment, the preset rules can include the adjustment range, adjustment step, and priority adjustment direction of the interior rearview mirror coordinates, and based on the current interior rearview mirror coordinates and the driver model eye point coordinates, new interior rearview mirror coordinates that satisfy the conditions are calculated. Iteration is required during the calculation process to find the optimal solution.

[0136] After changing the inner rearview mirror coordinates, the new inner rearview mirror coordinates must be re-determined to verify whether the adjustment achieves the expected effect. The verification process includes re-calculating the driver's viewing angle and viewing distance to ensure that they are less than the second threshold value and within the preset interval, respectively. If the verification result is not satisfactory, the preset rules need to be further optimized or the inner rearview mirror position is manually fine-tuned. Through this iterative method, the optimal inner rearview mirror position can be gradually approached, ensuring that it can provide a good view and comfortable viewing experience in actual driving.

[0137] The embodiment can quickly provide a reasonable adjustment scheme, reducing the error and time cost of manual adjustment. Through the constraint of the preset rules, the adjusted inner rearview mirror position can meet the design requirements in multiple aspects, improving the driving experience.

[0138] Based on the above technical solutions, the embodiment can more comprehensively reflect the spatial relationship between the inner rearview mirror position and the driver's eye point, while providing clear optimization targets and judgment criteria for designers.

[0139] In some embodiments, as mentioned in step S03, the position evaluation parameters are determined according to the inner rearview mirror coordinates and the eye point coordinates, which can also be specifically:

[0140] The elevation angle, horizontal rotation angle, and driver viewing distance are determined according to the inner rearview mirror coordinates and the eye point coordinates.

[0141] The elevation angle is the included angle between the line connecting the eye point of the driver model and the rotation center of the inner rearview mirror and the line of sight directly in front of the eye point of the driver model, projected on the first plane. The first plane is the plane perpendicular to the horizontal plane in which the line of sight directly in front of the eye point of the driver model lies. The horizontal rotation angle is the included angle between the line connecting the eye point of the driver model and the rotation center of the inner rearview mirror and the line of sight directly in front of the eye point of the driver model, projected on the second plane. The second plane is the horizontal plane. The driver viewing distance is the straight-line distance between the eye point of the driver model and the rotation center of the inner rearview mirror.

[0142] In this embodiment, the multi-dimensional parameter determination method can comprehensively and accurately quantify the spatial relationship between the inner rearview mirror position and the driver's eye point, providing more abundant and accurate data support for subsequent evaluation and optimization, making the optimization process more targeted and effective, and enabling the inner rearview mirror position to be improved more efficiently, thereby improving the overall driving experience.

[0143] Please refer to Figure 4 , to Figure 1A flow chart of one actual performance mode of S02 of the provided method for evaluating the position of the rearview mirror in a vehicle. In some embodiments, S02 mentioned, determining the coordinates of the rearview mirror and the eye point of the driver model in the three-dimensional model of the vehicle, which can specifically include the following steps:

[0144] S31, obtaining the height of the driver model and the parameters of the driver seat.

[0145] S32, determining the eye point angle according to the parameters of the driver seat, and determining the torso distance according to the height of the driver model.

[0146] For example, please refer to Figure 5 , a schematic diagram of the eye point angle provided by the embodiment of the present application. Among them, the eye point 502 angle is the angle between the line connecting the eye point 502 of the driver model and the hip point 503 and the vertical line of the eye point 502; the torso distance 505 is the distance from the eye point 502 of the driver model to the hip point 503.

[0147] In this embodiment, the backrest angle 504 of the driver seat and its specific coordinate position in the vehicle are first extracted from the three-dimensional model of the vehicle. Then, the eye point angle 501 is calculated using this information, that is, the angle between the line connecting the eye point 502 of the driver and the hip point 503 and the vertical line perpendicular to the eye point 502.

[0148] Among them, the backrest angle 504 of the driver seat refers to the angle between the seat backrest and the vertical line, which directly affects the sitting posture of the driver, thereby affecting the field of view of the driver and the position of the eye point 502, so this embodiment determines the eye point 502 angle 501 according to the backrest angle 504 of the driver seat. The eye point 502 angle 501 reflects the degree of inclination of the upper body of the driver, which directly affects how to accurately evaluate the field of view of the driver and the field of view blocked by the parts. By accurately calculating the eye point 502 angle 501, the actual field of view of the driver can be more realistically simulated, thereby providing important reference data for vehicle design.

[0149] Based on the height of the driver, which directly affects the sitting posture and field of view in the vehicle, the eye point positions of drivers of different heights are different, resulting in different sizes of the in-vehicle blind area. Therefore, in this embodiment, the height of the driver model is used to calculate the parameters for adjusting and determining the position of the eye point of the driver model in the three-dimensional model of the vehicle, thereby providing data support for identifying and quantifying the in-vehicle blind area.

[0150] In some embodiments, the driver seat parameters can include the backrest angle of the driver seat. On this basis, S32 mentioned, determining the eye point angle according to the parameters of the driver seat, which can specifically include:

[0151] Obtaining a preset eye point angle statistical table;

[0152] According to the driver seatback angle, the eye point angle corresponding to the eye point angle statistical table is determined.

[0153] In this embodiment, by creating an eye point angle statistical table, the table lists the eye point angles corresponding to different driver seatback angles according to the actual measurement data, so that the system can determine the corresponding eye point angle according to the driver seatback angle by querying the eye point angle statistical table. The eye point angle statistical table can be specifically as follows:

[0154] Seatback angle Eye point angle A26 17 0.34 18 1.17 19 2.00 20 2.85 21 3.68 22 4.51 23 5.34 24 6.17 25 7.00 26 7.83

[0155] In some embodiments, the eye point angle determined according to the driver seatback angle mentioned in step S32 can also be specifically as follows:

[0156] The eye point angle is determined according to the statistical analysis method, machine learning or empirical formula, so as to improve the efficiency and accuracy of determining the eye point angle.

[0157] In some embodiments, the trunk distance determined according to the driver model height mentioned in step S32 can specifically include:

[0158] A preset trunk distance statistical table is obtained;

[0159] According to the driver model height, the corresponding trunk distance is determined by querying the trunk distance statistical table.

[0160] In this embodiment, by creating a trunk distance statistical table, the table lists the trunk distances corresponding to different driver model heights according to the actual measurement data, so that the system can determine the corresponding trunk distance according to the driver model height by querying the trunk distance statistical table. The trunk distance statistical table can be specifically as follows:

[0161] Height (cm) Torso distance D (mm) 150 613 160 643 170 673 180 700 188 715 195 801

[0162] Step S33, according to the eye point angle, the trunk distance, the driver model height and the driver seat parameter to determine the eye point coordinate.

[0163] In some embodiments, the driver seat parameter can include the driver seat horizontal coordinate and the seat adjustment stroke;

[0164] On this basis, the eye point coordinate determined according to the eye point angle, the trunk distance, the driver model height and the driver seat parameter mentioned in step S33 can include the following steps:

[0165] Step S41, according to the driver model height to determine the adjustment constant.

[0166] Among them, the adjustment constant is a compensation value used to calculate the eye point coordinate, which is related to the height of the driver.

[0167] In some embodiments, the adjustment constant corresponding to drivers of different heights can be determined according to a preset adjustment constant table.

[0168] In this embodiment, the adjustment constant table is a preset data table used to determine the adjustment constant corresponding to drivers of different heights, which is a compensation value used to calculate the eye point coordinates and is related to the height of the driver. The adjustment constant table can be a standardized reference provided based on a large amount of anthropometric data and comfort research.

[0169] In some embodiments, the adjustment constant table can be specifically as follows:

[0170] Height (cm) Adjustment constant a 150 1 160 0.75 170 0.5 180 0.25 188 0 195 -0.1

[0171] By creating an adjustment constant table, the table lists the adjustment constants of drivers of different heights according to anthropometric data. The adjustment constant is used to adjust the position of the driver model in the three-dimensional model of the vehicle to ensure that the simulated eye point coordinates and line of sight direction accurately reflect the actual driver's field of view, so that users can optimize vehicle design for drivers of different heights, reduce blind spots, and improve driving safety and comfort. This method helps to ensure that vehicle design can adapt to a wide range of user groups and meet the needs of different drivers.

[0172] In some embodiments, the adjustment constant can also be determined according to statistical analysis methods, for example, a large amount of driver posture data can be collected, and then statistical software can be used for regression analysis to establish a mathematical model between height and adjustment constant, and finally the adjustment constant can be determined according to the mathematical model.

[0173] In some embodiments, the adjustment constant can also be determined by machine learning or empirical formula, for example, a large amount of driver posture data can be collected, and then the posture data can be used for model training or summary of empirical formula, and finally the adjustment constant can be determined according to the trained model or formula.

[0174] Step S42, calculating the eye point horizontal coordinate of the driver model according to the adjustment constant, the torso distance, the eye point angle, the hip point horizontal coordinate, and the seat adjustment stroke.

[0175] In this embodiment, the eye point horizontal coordinate of the driver model is calculated to accurately simulate the driver's field of view, thereby effectively identifying and quantifying the blind area in the vehicle. The seat position, backrest angle, etc. of drivers of different heights will be different when driving, so these parameters need to be considered comprehensively to determine the position of the eye point, so as to improve the accuracy of calculating the eye point horizontal coordinate.

[0176] In some embodiments, the eye point horizontal coordinate can be calculated according to the following formula:

[0177] Eye point horizontal coordinate = crotch point horizontal coordinate + seat adjustment stroke*cos(eye point angle) + torso distance*adjustment constant*sin(eye point angle)

[0178] Based on the above technical solution, the embodiment of the present application determines the position of the eye point by comprehensively considering the adjustment constant, the torso distance, the eye point angle, the crotch point horizontal coordinate and the seat adjustment stroke, improves the accuracy of calculating the eye point horizontal coordinate, and can accurately simulate the field of view of the driver, thereby providing data support for identifying and quantifying the blind area in the vehicle.

[0179] In some embodiments, the driver's seat parameters can include the crotch point vertical coordinate, the driver's seat back angle and the driver model height;

[0180] On this basis, according to the eye point angle, the torso distance, the driver model height and the driver's seat parameters to determine the eye point coordinate, which can specifically include:

[0181] According to the eye point angle, the torso distance and the crotch point vertical coordinate, the eye point vertical coordinate of the driver model is calculated.

[0182] In this embodiment, the eye point vertical coordinate of the driver model is calculated to accurately simulate the field of view of the driver, thereby effectively identifying and quantifying the blind area in the vehicle. The seat position, back angle and other parameters of the driver of different heights will be different when driving, so the position of the eye point is determined by comprehensively considering these parameters to improve the accuracy of calculating the eye point vertical coordinate.

[0183] In some embodiments, the eye point horizontal coordinate can be calculated according to the following formula:

[0184] Eye point vertical coordinate = crotch point vertical coordinate + torso distance*cos(eye point angle)

[0185] Based on the above technical solution, the embodiment of the present application determines the position of the eye point by comprehensively considering the torso distance, the eye point angle and the crotch point vertical coordinate, improves the accuracy of calculating the eye point horizontal coordinate, and can accurately simulate the field of view of the driver, thereby providing data support for identifying and quantifying the blind area in the vehicle.

[0186] In some embodiments, the driver's seat parameters can include the crotch point vertical coordinate;

[0187] On this basis, according to the eye point angle, the torso distance, the driver model height and the driver's seat parameters to determine the eye point coordinate, which can specifically include the following steps:

[0188] According to the crotch point vertical coordinate, the eye point vertical coordinate of the driver model is determined.

[0189] In some embodiments, the driver's seat parameters can include hip point coordinates and seat horizontal adjustment travel;

[0190] On this basis, according to the eye point angle, the torso distance, the driver model height and the driver's seat parameters, the eye point coordinates are determined, which can be specifically:

[0191] The eye point coordinates are determined according to the eye point angle, the torso distance, the driver model height, the hip point coordinates and the seat horizontal adjustment travel, and the eye point coordinates satisfy formula (6):

[0192]

[0193] Where X0 is the hip point horizontal coordinate, Y0 is the hip point vertical coordinate, Z0 is the hip point vertical coordinate, X2 is the eye point horizontal coordinate, Y2 is the eye point vertical coordinate, Z2 is the eye point vertical coordinate, A26 is the eye point angle, D is the torso distance, L is the seat adjustment travel, and a is the adjustment constant.

[0194] In this embodiment, the precise three-dimensional coordinates of the eye point in the vehicle interior space are calculated according to the adjustment constant, the backrest angle and coordinates of the driver's seat, and the eye point angle. This process ensures that the eye point coordinates of the driver can be accurately determined regardless of the driver's height, providing a scientific basis for evaluating and optimizing the driver's field of view, with the ultimate goal of reducing the field of view blind area and improving driving safety.

[0195] Through this method, vehicle designers can optimize the seat position, steering wheel height and angle for drivers of different heights to ensure that each driver can obtain the best field of view range and comfort. This not only improves the driving experience, but also helps to prevent traffic accidents caused by poor visibility, reflecting the importance of human engineering in modern car design.

[0196] Based on the above technical solutions, the embodiment can significantly improve the accuracy and applicability of the key field of view calibration area setting, so that vehicle design can better adapt to the physiological characteristics of different drivers, thereby reducing the field of view blind area and improving driving safety. In addition, this embodiment helps to discover and solve potential visibility problems in the design stage, avoiding expensive modifications in the later stage, saving time and cost.

[0197] Please refer to Figure 6 , a structural diagram of a vehicle interior rearview mirror position evaluation system provided by the embodiment of the present application. As Figure 6 shown, the vehicle interior rearview mirror position evaluation system can include:

[0198] The acquisition module 100 is used to acquire a three-dimensional model of a vehicle;

[0199] The coordinate determining module 200 is configured to determine a coordinate of the interior rearview mirror and a coordinate of the eye point of the driver in the three-dimensional model of the vehicle.

[0200] The evaluation module 300 is configured to determine a position evaluation parameter according to the coordinate of the interior rearview mirror and the coordinate of the eye point, and evaluate the position of the interior rearview mirror based on the position evaluation parameter.

[0201] In some embodiments, the position evaluation parameter includes a viewing angle of the driver.

[0202] The evaluation module 300 can be specifically configured to:

[0203] If the viewing angle of the driver is less than a first threshold value, it is determined that the angle evaluation of the interior rearview mirror is a first level.

[0204] If the viewing angle of the driver is greater than the first threshold value and less than a second threshold value, it is determined that the angle evaluation of the interior rearview mirror is a second level.

[0205] If the viewing angle of the driver is greater than the second threshold value, it is determined that the angle evaluation of the interior rearview mirror is a third level.

[0206] In some embodiments, the viewing angle of the driver includes a vertical angle and a horizontal rotation angle.

[0207] The evaluation module 300 can be specifically configured to:

[0208] If the vertical angle and the horizontal rotation angle are both less than a first threshold value, it is determined that the angle evaluation of the interior rearview mirror is a first level.

[0209] When the vertical angle and the horizontal rotation angle are both less than a second threshold value, if the vertical angle is greater than the first threshold value, and / or, the horizontal rotation angle is greater than the first threshold value, it is determined that the angle evaluation of the interior rearview mirror is a second level.

[0210] If the vertical angle is greater than the second threshold value, and / or, the horizontal rotation angle is greater than the second threshold value, it is determined that the angle evaluation of the interior rearview mirror is a third level.

[0211] In some embodiments, the evaluation module 300 can be further configured to:

[0212] When the vertical angle is greater than the second threshold value, the interior rearview mirror in the three-dimensional model of the vehicle is moved downward by a first preset distance, and the first preset distance satisfies formula (1):

[0213] ΔZ = Z1 - Z2 - (X2 - X1) * tan α (1)

[0214] When the horizontal rotation angle is greater than the second threshold value, the interior rearview mirror in the three-dimensional model of the vehicle is moved leftward by a second preset distance, and the second preset distance satisfies formula (2):

[0215] ΔY = Y1 - Y2 - (X2 - X1) * tan α (2)

[0216] Wherein, ΔZ is the first preset distance, Z1 is the rearview mirror rotation center vertical coordinate, Z2 is the driver eye point vertical coordinate, X1 is the inside rearview mirror rotation center horizontal coordinate, X2 is the driver eye point horizontal coordinate, α is the second threshold, ΔY is the second preset distance, Y1 is the inside rearview mirror rotation center longitudinal coordinate, Y2 is the driver eye point longitudinal coordinate.

[0217] On the basis of the above embodiment, in some embodiments, the position evaluation parameter further comprises a driver viewing distance.

[0218] The evaluation module 300 can be specifically used for:

[0219] If the driver viewing distance is within the preset interval, it is determined that the distance evaluation of the inside rearview mirror is first level.

[0220] If the driver viewing distance is outside the preset interval, it is determined that the distance evaluation of the inside rearview mirror is second level.

[0221] On the basis of the above embodiment, in some embodiments, the evaluation module 300 can also be used for:

[0222] According to the preset rule, the inside rearview mirror coordinates in the vehicle three-dimensional model are changed; the changed inside rearview mirror coordinates satisfy that the driver viewing angle determined based thereon is less than the second threshold, and the driver viewing distance determined based thereon is within the preset interval.

[0223] On the basis of the above embodiment, in some embodiments, the evaluation module 300 can be specifically used for:

[0224] According to the inside rearview mirror coordinates and the eye point coordinates, the elevation angle, the horizontal rotation angle and the driver viewing distance are determined.

[0225] Wherein, the elevation angle is the included angle between the line connecting the eye point of the driver model and the inside rearview mirror rotation center and the line of sight directly in front of the eye point of the driver model, projected on the first plane; the first plane is the plane perpendicular to the horizontal plane in which the line of sight directly in front of the eye point of the driver model is located; the horizontal rotation angle is the included angle between the line connecting the eye point of the driver model and the inside rearview mirror rotation center and the line of sight directly in front of the eye point of the driver model, projected on the second plane; the second plane is the horizontal plane; the driver viewing distance is the straight line distance between the eye point of the driver model and the inside rearview mirror rotation center.

[0226] On the basis of the above embodiment, in some embodiments, the elevation angle satisfies formula (3):

[0227]

[0228] The horizontal rotation angle satisfies formula (4):

[0229]

[0230] The driver viewing distance satisfies formula (5):

[0231]

[0232] Wherein, β is the elevation angle, Z1 is the vertical coordinate of the inner rearview mirror rotation center, X1 is the horizontal coordinate of the inner rearview mirror rotation center, Z2 is the vertical coordinate of the driver eye point, X2 is the horizontal coordinate of the driver eye point; γ is the horizontal rotation angle, Y1 is the longitudinal coordinate of the inner rearview mirror rotation center, Y2 is the longitudinal coordinate of the driver eye point, and B is the driver viewing distance.

[0233] On the basis of the above embodiment, in some embodiments, the coordinate determination module 200 can be specifically used for:

[0234] Obtaining the driver model height and the driver seat parameters;

[0235] Determining the eye point included angle according to the driver seat parameters, and determining the torso distance according to the driver model height; the eye point included angle is the included angle between the line connecting the eye point of the driver model and the hip point and the plumb line of the eye point; the torso distance is the distance from the eye point of the driver model to the hip point;

[0236] Determining the eye point coordinates according to the eye point included angle, the torso distance, the driver model height and the driver seat parameters.

[0237] On the basis of the above embodiment, in some embodiments, the coordinate determination module 200 can be specifically used for:

[0238] Determining the eye point coordinates according to the eye point included angle, the torso distance, the driver model height and the driver seat parameters, comprising:

[0239] According to formula Calculating the eye point coordinates;

[0240] Wherein, X0 is the horizontal coordinate of the hip point, Y0 is the longitudinal coordinate of the hip point, Z0 is the vertical coordinate of the hip point, X2 is the horizontal coordinate of the eye point, Y2 is the longitudinal coordinate of the eye point, Z2 is the vertical coordinate of the eye point, A26 is the eye point included angle, D is the torso distance, L is the seat adjustment stroke, and α is the adjustment constant.

[0241] The embodiment provides an electronic device, including a processor and a memory, the memory is used for storing at least one instruction, the instruction is loaded and executed by the processor to realize the navigation method based on congestion prediction described above, the execution mode and beneficial effects are similar, here will not be repeated.

[0242] It is to be understood that even though the steps of some of the embodiments have been described in a certain order, this order can not be necessary for every implementation. One or more steps from each embodiment can be performed in an order different than described, and in some cases, steps can even be performed in parallel or omitting certain steps, without departing from the various embodiments. The various embodiments described herein can be implemented in software and / or hardware, e.g., through use of circuitry that cooperates with appropriate software. As will be apparent, particular embodiments can be implemented in software, hardware or a combination thereof.

[0243] The preferred embodiments of the present application have been described above with the intent to be illustrative only and not limiting of the application as defined by the appended claims. Changes in form and detail can be made to the implementation without departing from the spirit and scope of the application as defined by the following claims.

Claims

1. A method for evaluating the position of a rearview mirror in a vehicle, characterized in that: include: Obtaining a three-dimensional model of the vehicle; Determining the coordinates of the interior rearview mirror and the eye point coordinates of the driver model in the three-dimensional vehicle model; A position evaluation parameter is determined according to the interior rearview mirror coordinates and the eye point coordinates, and the position of the interior rearview mirror is evaluated based on the position evaluation parameter.

2. The method according to claim 1, characterized in that The position evaluation parameters include the driver's viewing angle; The evaluating the position of the interior rearview mirror based on the position evaluation parameter includes: If the driver's viewing angle is less than a first threshold, determining that the angle evaluation of the interior rearview mirror is level one; If the driver's viewing angle is greater than the first threshold and less than the second threshold, determining that the angle evaluation level of the interior rearview mirror is level 2; If the driver's viewing angle is greater than the second threshold, the angle evaluation level of the interior rearview mirror is determined to be level three.

3. The method according to claim 2, characterized in that The driver's viewing angle includes an elevation angle and a horizontal rotation angle; the elevation angle is the angle between the line connecting the eye point of the driver model and the rotation center of the interior rearview mirror and the line of sight directly in front of the driver model's eye point, projected on a first plane; the first plane is a plane perpendicular to the horizontal plane in the plane where the line of sight directly in front of the driver model's eye point is located; the horizontal rotation angle is the angle between the line connecting the eye point of the driver model and the rotation center of the interior rearview mirror and the line of sight directly in front of the driver model's eye point, projected on a second plane; The second plane is a horizontal plane; If the driver's viewing angle is less than a first threshold, determining that the angle evaluation level of the interior rearview mirror is level one includes: If both the elevation angle and the horizontal rotation angle are smaller than the first threshold, determining that the angle evaluation level of the rearview mirror is level one; If the driver's viewing angle is greater than the first threshold and less than the second threshold, determining that the angle evaluation level of the interior rearview mirror is level 2 includes: When both the elevation angle and the horizontal rotation angle are less than the second threshold, if the elevation angle is greater than the first threshold, and / or the horizontal rotation angle is greater than the first threshold, determining that the angle evaluation level of the interior rearview mirror is level 2; If the driver's viewing angle is greater than the second threshold, determining that the angle evaluation level of the interior rearview mirror is level three includes: If the elevation angle is greater than the second threshold, and / or the horizontal rotation angle is greater than the second threshold, it is determined that the angle evaluation level of the interior rearview mirror is level three.

4. The method according to claim 3, characterized in that After determining that the angle evaluation level of the interior rearview mirror is level three, the method further includes: When the elevation angle is greater than the second threshold, the interior rearview mirror in the three-dimensional model of the vehicle is moved downward by a first preset distance, and the first preset distance satisfies formula (1): ΔZ=Z1-Z2-(X2-X1)*tanα (1) When the horizontal rotation angle is greater than the second threshold, the interior rearview mirror in the vehicle three-dimensional model is moved to the left by a second preset distance, and the second preset distance satisfies formula (2): ΔY=Y1-Y2-(X2-X1)*tanα (2) Among them, ΔZ is the first preset distance, Z1 is the vertical coordinate of the rearview mirror rotation center, Z2 is the vertical coordinate of the driver's eye point, X1 is the horizontal coordinate of the interior rearview mirror rotation center, X2 is the horizontal coordinate of the driver's eye point, α is the second threshold, ΔY is the second preset distance, Y1 is the vertical coordinate of the interior rearview mirror rotation center, and Y2 is the vertical coordinate of the driver's eye point.

5. The method according to claim 2, characterized in that The position evaluation parameter also includes a driver viewing distance; the driver viewing distance is a straight-line distance between the eye point of the driver model and the rotation center of the interior rearview mirror; The evaluating the position of the interior rearview mirror based on the position evaluation parameter includes: If the driver's viewing distance is within a preset range, determining that the distance evaluation of the interior rearview mirror is level one; If the driver's viewing distance is outside the preset range, the distance evaluation of the interior rearview mirror is determined to be level two.

6. The method according to claim 5, characterized in that After determining that the distance evaluation level of the interior rearview mirror is level 2, the method further includes: The interior rearview mirror coordinates in the vehicle three-dimensional model are changed according to preset rules; the changed interior rearview mirror coordinates satisfy that the driver's viewing angle determined based on the changed interior rearview mirror coordinates is less than the second threshold, and the driver's viewing distance determined based on the changed interior rearview mirror coordinates is within the preset range.

7. The method according to any one of claims 1 to 6, characterized in that The determining of the position evaluation parameters according to the inner rearview mirror coordinates and the eye point coordinates includes: Determine the elevation angle, the horizontal rotation angle and the driver's viewing distance according to the interior rearview mirror coordinates and the eye point coordinates; Among them, the elevation angle is the angle between the line connecting the eye point of the driver model and the rotation center of the rearview mirror and the line of sight directly in front of the driver model's eye point, projected on the first plane; the first plane is a plane perpendicular to the horizontal plane in the plane where the line of sight directly in front of the driver model's eye point is located; the horizontal rotation angle is the angle between the line connecting the eye point of the driver model and the rotation center of the rearview mirror and the line of sight directly in front of the driver model's eye point, projected on the second plane; the second plane is a horizontal plane; the driver's viewing distance is the straight-line distance between the driver model's eye point and the rotation center of the rearview mirror.

8. The method according to claim 7, characterized in that The elevation angle satisfies formula (3): The horizontal rotation angle satisfies formula (4): The driver's viewing distance satisfies formula (5): Among them, β is the elevation angle, Z1 is the vertical coordinate of the interior rearview mirror rotation center, X1 is the horizontal coordinate of the interior rearview mirror rotation center, Z2 is the vertical coordinate of the driver's eye point, and X2 is the horizontal coordinate of the driver's eye point; γ is the horizontal rotation angle, Y1 is the vertical coordinate of the interior rearview mirror rotation center, Y2 is the vertical coordinate of the driver's eye point, and B is the driver's viewing distance.

9. The method according to claim 1, characterized in that Determining the coordinates of the interior rearview mirror and the eye point coordinates of the driver model in the three-dimensional vehicle model includes: Get the driver model's height and driving position parameters; The eyepoint angle is determined according to the driving position parameters, and the torso distance is determined according to the height of the driver model; the eyepoint angle is the angle between the line connecting the eyepoint and the hip point of the driver model and the eyepoint plumb line; the torso distance is the distance between the eyepoint and the hip point of the driver model; The eye point coordinates are determined according to the eye point angle, the torso distance, the height of the driver model and the driving position parameters.

10. The method according to claim 9, characterized in that The driving position parameters include hip point coordinates and seat horizontal adjustment travel; The determining of the eyepoint coordinates according to the eyepoint angle, the torso distance, the height of the driver model and the driving position parameters includes: The eye point coordinates are determined according to the eye point angle, the torso distance, the height of the driver model, the hip point coordinates, and the seat horizontal adjustment stroke. The eye point coordinates satisfy formula (6): Among them, X0 is the horizontal coordinate of the hip point, Y0 is the vertical coordinate of the hip point, Z0 is the vertical coordinate of the hip point, X2 is the horizontal coordinate of the eye point, Y2 is the vertical coordinate of the eye point, Z2 is the vertical coordinate of the eye point, A26 is the eye point angle, D is the torso distance, L is the seat adjustment stroke, and α is the adjustment constant.

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