CN116533889A - Light shield, method for determining front end boundary of light shield and vehicle - Google Patents

Abstract

The invention provides a sunshade, a method for determining the front boundary of the sunshade, and a vehicle, and belongs to the technical field of front-view camera accessories layout. The front-end boundary position of the sunshade is determined by the method for determining the front-end boundary of the front-view camera sunshade of the application. , considering the area affected by the stray light at the position of the instrument panel in the vehicle on the front-view camera, using optical path analysis to find that the light reflected by the windshield enters the front boundary of the affected area, and determine the boundary where the hood needs to block the stray light according to the optical path Position, so as to reduce the size of the hood, but also meet the needs of blocking stray light in the car, and prevent the impact on the shooting and recognition of the front-view camera.

Description

Sunshield, method of determining front boundary of sunshield, and vehicle

technical field

The invention relates to the technical field of automobile front-view camera accessories arrangement, in particular to a sunshade, a method for determining the front boundary of the sunshade, and a vehicle.

Background technique

The Advanced Driving Assistance System (Advanced Driving Assistance System) uses various sensors installed on the car, such as millimeter wave radar, laser radar, single/binocular camera and satellite navigation, to sense the surrounding environment at any time during the driving process of the car. , collect data, identify, detect and track static and dynamic objects, and combine navigation map data for systematic calculation and analysis, so that drivers can be aware of possible dangers in advance, effectively increasing the comfort and comfort of driving Safety, and the forward-looking camera is an important part of this system.

Today's automotive industry has higher and higher requirements for intelligent driving, and higher and higher requirements for the visual recognition accuracy of front-view cameras. In the actual driving process, the stray light inside the car will be projected onto the front windshield, affecting the visual recognition of the camera, reducing the recognition accuracy, imaging quality and contrast, and causing misjudgment of driving conditions. Therefore, it is necessary to match the hood for the front-view camera , to eliminate the impact and improve the imaging quality of the front-view camera. The front end of the lower base plate of the sun hood will be bonded to the front windshield, making the sun hood large in size and unattractive in appearance, and because the current new car styling is increasingly pursuing a low-slung sports style, the front windshield The glass inclination angle is very large, that is, the angle between the front windshield and the vertical direction increases, and the angle between the horizontal direction decreases. The front end of the sunshade needs to extend to the front windshield, and the size will be particularly large. Not only It is not beautiful and affects the requirements of the front and upper vision in the car. Therefore, how to reduce the size of the hood while meeting the requirements of shielding the stray light from affecting the front-view camera has become an urgent problem to be solved.

Contents of the invention

In order to overcome the above technical problems, the present invention provides a sunshade, a method for determining the front boundary of the sunshade and a vehicle, so as to solve the problem of how to reduce the size of the sunshade while meeting the requirements of shielding stray light.

In order to solve the problems of the technologies described above, the technical solution of the present invention is as follows:

A method for determining the lower boundary of the front-view camera field of view envelope boundary, comprising the following steps, determining the ground line where the vehicle is located; determining the target line in the blind zone, the target line in the blind zone is perpendicular to the ground line, and the vertical intersection point and the front end of the vehicle are on the ground line The distance between the projection points on is the distance of the blind zone; the plane where the line connecting the target line of the blind zone and the focal point of the front-view camera is located is the lower boundary of the envelope boundary of the field of view.

Preferably, the ground line is a passenger-carrying ground line.

A sunshade, the sunshade is connected to the installation base of the vehicle interior rearview mirror, the sunshade includes a lower base plate, a left vertical plate, a right vertical plate and a rear vertical plate, the position of the lower base plate is determined by the aforementioned method The lower bound of the limit;

The rear vertical plate is arranged at the front end of the front-view camera, and the rear vertical plate is provided with an opening, the opening is located in front of the front-view camera lens, and the rear ends of the lower base plate, the left vertical plate, and the right vertical plate are respectively It is connected with the rear vertical board, and the lower ends of the left vertical board and the right vertical board are respectively connected with the left and right sides of the lower bottom board.

Preferably, the vertical distance between the front end of the lower base plate and the lower boundary of the envelope boundary of the field of view of the front-view camera is 2mm.

A method for determining a front boundary of a sunshade, comprising the steps of:

Step S1: the front-view camera and the hood are arranged in the vehicle, and the hood is the aforementioned hood;

Step S2: According to the characteristic area of the instrument panel that needs to be blocked, combined with the area where objects placed on the instrument panel will form harmful reflections on the front windshield, the occlusion area is determined, and the position of the instrument panel surface at the front boundary of the occlusion area is defined as front boundary line;

Step S3: Analyze the optical path of the light emitted by the focal point of the front-view camera, and obtain the light reflected by the inner surface of the front windshield and directed to the front boundary line described in step S2;

Step S4: The boundary position between the path of the light in step S3 and the lower bottom plate of the hood is taken as the boundary line of the front end of the hood, and the plane in the vertical direction where the boundary line of the front end of the hood is located is the front boundary of the hood.

Preferably, the features of the instrument panel in the step S2 include instrument panel decorations, head-up displays, center speakers, and air outlets.

Preferably, the characteristic area of the instrument panel that needs to be blocked in the step S2 is: taking the vertical plane where the front end of the instrument panel is close to the front windshield as the interface, the instrument panel located on the side of the interface away from the front windshield area;

In the step S2, the area where objects placed on the instrument panel will form harmful reflections on the front windshield is: the area where the vertical distance between the instrument panel surface and the front windshield is greater than or equal to the influence height H.

Preferably, the impact height H is 80mm.

Preferably, the front-view camera is connected to the mounting base of the interior rearview mirror of the vehicle, and the front-end of the front-view camera is equipped with a hood, and the front boundary of the hood is determined by the aforementioned method for determining the front boundary of the hood.

Preferably, a defrosting and defogging line is installed inside the front windshield, and the defrosting and defogging line is located in the shooting area of the front-view camera. Compared with the prior art, the beneficial effects of the technical solution of the present invention are:

The invention provides a sunshade, a method for determining the front boundary of the sunshade and a vehicle,

1. Determine the position of the front boundary of the sunshade when it is arranged through the method for determining the front boundary of the sunshade in this application, consider the area where the stray light at the position of the instrument panel in the vehicle affects the front-view camera, and use the optical path analysis to find the area through the windshield. The reflected light enters the light path at the front boundary of the affected area. According to the light path, the boundary position where the hood needs to be shielded from stray light is determined, so as to reduce the size of the hood and meet the needs of shielding stray light in the car to prevent damage to the vehicle. The shot recognition of the front view camera is affected.

2. The reduced-size sunshade not only has good visual effect, but also is suitable for a variety of car styles, especially those with a relatively horizontal front windshield; and it will not affect the driver's or passenger's demand for front vision.

3. By setting the defrosting and defogging line on the front windshield, it can prevent the front windshield from fogging and affecting the shooting of the front-view camera due to the temperature difference between the inside and outside of the car in extreme weather.

Description of drawings

Fig. 1 is a schematic diagram of the principle of determining the lower boundary of the envelope boundary of the field of view of the forward-looking camera;

Fig. 2 is a schematic diagram of the position between the hood and the envelope boundary of the field of view of the front-view camera;

Fig. 3 is a schematic diagram of the position between the hood and the front windshield;

Fig. 4 is a schematic diagram of the top view structure of the hood and the front-view camera;

Fig. 5 is a schematic flow chart of a method for determining the front boundary of the light shield;

Fig. 6 is a top view diagram of the shielded area of the instrument panel;

Fig. 7 is a side view of the instrument panel and the light path;

FIG. 8 is a lateral schematic diagram of the front boundary of the hood and the light path;

Fig. 9 is a schematic diagram of the side view structure of the position relative to the front windshield after the boundary of the front end of the hood is reduced;

Figure 10 is a schematic diagram of the internal structure of the vehicle assembly hood and defrosting and defogging lines;

Fig. 11 is an enlarged schematic diagram of the partial structure of the shading cover and defrosting and defogging lines in Fig. 10;

Among them: 1. Front-view camera; 2. Vehicle; 3. Ground line; 4. Hood; 5. Rearview mirror mounting base; 6. Front windshield; 7. Instrument panel; , head-up display; 10, center speaker; 11, air outlet; 12, light path; 13, front boundary of hood; 14, defrosting and defogging line;

101. Front view camera field of view envelope boundary; 401, lower base plate; 402, left vertical plate; 403, right vertical plate; 404, rear vertical plate.

Detailed ways

Embodiments of the present invention will be described below with reference to the accompanying drawings and preferred embodiments, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention, but not for limiting the protection scope of the present invention.

It should be noted that the diagrams provided in the following embodiments are only schematically illustrating the basic ideas of the present invention, and only the components related to the present invention are shown in the diagrams rather than the number, shape and shape of the components in actual implementation. Dimensional drawing, the type, quantity and proportion of each component can be changed arbitrarily during actual implementation, and the component layout type may also be more complicated.

The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

This embodiment provides a method for determining the lower boundary of the front-view camera field of view envelope boundary, including the following steps: determining the ground line where the vehicle is located; determining the target line in the blind area, the target line in the blind area is perpendicular to the ground line, and the vertical intersection point is at the front end of the vehicle The distance between the projection points on the ground line is the distance of the blind zone; the plane where the line connecting the target line of the blind zone and the focal point of the front-view camera is the lower boundary of the envelope boundary of the field of view.

The boundary of the front-view camera field of view envelope boundary is determined according to the blind area, or according to the camera performance provided by the front-view camera manufacturer. The lower boundary is generally based on the vehicle manufacturer’s requirements for capturing areas other than the blind area target. Requirement setting, for example, the blind spot target is 3m from the front of the vehicle, that is, the blind spot is within 3 meters from the front of the vehicle, and the area farther than 3 meters from the front of the vehicle needs to be captured by the front-view camera 1. Therefore, the lower boundary of the front-view camera's field of view envelope boundary The target in the blind zone is determined in combination with the focus of the front-view camera. According to the ground line where the vehicle is located, the target line in the blind zone is located on the same plane. The target line in the blind zone is determined by the distance from the projected point of the front end of the vehicle on the ground to the direction of the vehicle in the blind zone. The focal point of the front-view camera The lower field of view should include the target line of the blind zone, that is, the plane where the lower boundary of the envelope boundary of the field of view of the front-view camera is located passes through the focal point and the target line of the blind zone.

Referring to Fig. 1, after the front-view camera 1 is arranged at a suitable position, the focal point O on the optical axis of the front-view camera 1 is determined as the starting point, the blind spot distance is 3.5m in front of the vehicle blind spot D1, and the ground line 3 is the one-person ground point B is the projection point of the front end of the outer contour of vehicle 2 on the ground line, the distance between point A and point B is D1, and point A is the vertical intersection point between the target line in the blind zone and the ground line, then a straight line is drawn through the starting point O OA intersects with the ground line 3 of the one-person vehicle, and the plane where the straight line OA is located is the lower boundary of the front-view camera's field of view envelope boundary; similarly, the upper boundary and left and right boundaries of the front-view camera's field of view envelope boundary can also be based on the aforementioned method The blind spot target is determined, or the left and right boundaries and the upper boundary are given by the manufacturer of the front-view camera 1 according to the performance, so the upper boundary and the left and right boundaries of the front-view camera's field of view envelope boundary will not be repeated.

In a further embodiment, the ground line is a one-passenger ground line. The one-passenger ground line refers to the ground line of the vehicle with one driver in the vehicle. According to the demand, it can be determined according to the unloaded ground line or the fully loaded ground line.

In another embodiment, as shown in FIGS. 2-4 , a sunshade is provided. The sunshade 4 is connected to the mounting base 5 of the interior rearview mirror of the vehicle. The sunshade 4 includes a lower base plate 401, a left vertical plate 402, and a right vertical plate. 403 and the rear vertical plate 404, the position of the lower base plate 401 is defined by the lower boundary determined by the method for determining the lower boundary of the front-view camera field of view envelope boundary; the front end of the lower base plate 401 is in contact with the front windshield 6, and is located Below the lower boundary of the camera field of view envelope boundary 101, to prevent it from blocking the field of view of the front-view camera 1, the rear vertical plate 404 is arranged at the front end of the front-view camera, and the rear vertical plate 404 is provided with an opening, and the opening is located in front of the front-view camera lens , the rear ends of the lower base plate 401, the left vertical plate 402, and the right vertical plate 403 are respectively connected with the rear vertical plate 404, and the lower ends of the left vertical plate 402 and the right vertical plate 403 are respectively connected with the left and right sides of the lower base plate 401. Wherein the front ends of the left vertical plate 402, the right vertical plate 403 and the rear vertical plate 404 are all connected with the front windshield 6, and have the same arc CD as the front windshield 6. In like manner, the left vertical plate 402, the right vertical The board 403 is set according to the position of the left boundary and the right boundary of the envelope boundary 101 of the front-view camera field of view, so as to ensure that the field of view of the front-view camera 1 is not blocked by the left vertical board 402 and the right vertical board 403 .

In a further embodiment, with reference to FIGS. 3-4 , the vertical distance between the front end of the lower base plate 401 and the lower boundary of the front-view camera field of view envelope boundary 101 is 2mm, so as to prevent the field of view of the front-view camera 1 from being blocked by mistake; The lateral distance D2 between the front end of the plate 402 and the left boundary of the front-view camera field of view envelope boundary 101 is 2mm, in like manner, the front end of the right vertical plate 403 is set and the right boundary of the front-view camera field of view envelope boundary 101 The lateral distance is 2 mm, and a certain safe distance is set with the envelope boundary 101 of the field of view of the front-view camera.

In a further embodiment, the diameter of the hole is 3mm more than the diameter of the front-view camera 1 lens, and the distance between the edge of the hole and the edge of the front-view camera 1 lens is greater than 1.5mm to ensure the shooting area of the front-view camera 1. Situation adjustment.

In another embodiment, as shown in FIG. 5 , a method for determining the front boundary of the sunshade is provided, including the following steps:

Referring to Figures 2-4, step S1: the front-view camera 1 and the sunshade 4 are arranged in the vehicle, and the sunshade 4 is the aforementioned sunshade 4;

Step S2: According to the characteristic area of the instrument panel that needs to be blocked, combined with the area where objects placed on the instrument panel will form harmful reflections on the front windshield, the occlusion area is determined, and the position of the instrument panel surface at the front boundary of the occlusion area is defined as front boundary line;

Step S3: Analyze the light path of the light emitted by the focal point of the front-view camera, and obtain the light reflected by the inner surface of the front windshield and directed to step S2 to determine the front boundary line;

Step S4: The boundary position between the light path of step S3 and the lower base plate 401 of the hood 4 is taken as the boundary line of the front end of the hood, and the vertical plane where the boundary line of the front end of the hood is located is the front boundary of the hood.

The position of the front boundary of the front-view camera 1 hood determines the size of the hood. The hood 4 shown in FIG. 2 and FIG. The position of the envelope boundary 101 is arranged so that it does not affect the forward-looking camera 1 to take pictures ahead; referring to FIG. The curved surface CD with the same degree of curvature of the glass 6 and the lap joint with the front windshield 6 will make the size of the sunshield 4 larger, especially when the front windshield 6 has a large inclination angle, that is, the front windshield 6 and the front windshield 6 The included angle in the horizontal direction is reduced, and the front end of the sunshade 4 needs to be extended for a long distance to be bonded to the front windshield 6, resulting in an increase in the size of the sunshade 4, which affects the driver's vision and sensory experience;

Therefore, by the method for determining the front-end boundary of the front-view camera hood of the present embodiment, the front-end boundary of the camera is determined. The impact of astigmatism can reduce the size of the sunshade 4. In the specific implementation process, after the front-view camera 1 is installed in the vehicle, as shown in Figure 3, it is generally installed at the position of the rearview mirror installation base 5, and the installation is completed. Finally, the front-view camera field of view envelope boundary 101 is determined, and the aforementioned method is used to determine the lower boundary of the front-view camera field of view envelope boundary 101. Since the light shield 4 is mainly the inside of the front windshield 6, the front-view camera field of view envelope The junction of the boundary 101 and the front windshield 6 can define the lower boundary and the left and right boundaries, wherein the stray light in the car is mainly projected to the front windshield 6 through the bottom of the sunshade 4, and the bright light at the instrument panel will affect the front windshield 6. and will form harmful reflections on the front windshield 6 to affect the front-view camera 1, so when determining the occlusion area, according to the characteristic area of the instrument panel that needs to be occluded, combined with the items placed on the instrument panel, it will be placed on the front windshield In the area where harmful reflections are formed on the upper part of the screen, the position at the front end boundary of the shielding area, that is, the surface on the instrument panel closest to the front windshield 6, is the front end boundary line. After determining the position on the instrument panel that affects the front-view camera 1 , carry out optical path analysis to the light that the focal point of forward-looking camera 1 sends, obtain the light that is reflected by the inner surface of front windshield glass 6 and shoot toward the front end boundary line; The front boundary line of the hood, the plane in the vertical direction where the front boundary line of the hood is the front boundary of the hood, that is, when the hood 4 is arranged, the front end of the hood 4 is limited to the vertical plane position where the front boundary of the hood is located, It can block the stray light emitted by the instrument panel at the front boundary of the area that affects the front-view camera 1, that is, it can block the stray light emitted by the shielded area on the entire instrument panel. After the front end of the hood 4 is arranged, the size can be reduced While meeting the needs of shielding stray light in the car;

It is equivalent to the structure that the front end of the original sunshield 4 extends to the front windshield 6. After determining the front end boundary of the sunshield, the original sunshield 4 is cut off from the front end boundary of the sunshield, and will be close to the front windshield 6. Part of the hood is discarded, and the hood 4 on the rear side of the front boundary of the hood is retained, which reduces the size of the hood 4 in the prior art.

In a further embodiment, as shown in FIG. 6 , the features of the instrument panel in step S2 include instrument panel trim 8 , head-up display 9 , center speaker 10 , and air outlet 11 . Among them, the head-up display: Head Up Display, referred to as HUD; instrument panel: Instrument Panel, referred to as IP.

In a further embodiment, the characteristic area of the instrument panel that needs to be blocked in step S2 is: the instrument panel located on the side of the interface away from the front windshield with the vertical plane where the front end of the instrument panel is close to the front windshield as the interface Area; the light generated by the instrument panel in this area will be captured by the front-view camera, which will affect the work of the front-view camera, that is, the position on the instrument panel that will generate stray light. Find the position on the instrument panel closest to the front windshield , the area behind this position may affect the front-view camera, so the area behind the interface is used as an occlusion area;

In step S2, the area where items placed on the instrument panel will form harmful reflections on the front windshield is: the area where the vertical distance between the instrument panel surface and the front windshield is greater than or equal to the impact height H, and some items will be placed on the instrument panel , these objects will form harmful reflections on the front windshield, and these areas also need to be covered, but because some positions are closer to the front windshield, there is no risk of excessive glare, and it will not affect the shooting effect of the front-view camera , so the area closer to the front windshield is no longer considered, and only the area that is greater than or equal to the impact height H from the front windshield is used as the occlusion area; through the combination of the two, the occlusion area that needs to be occluded is determined.

In a further embodiment, the impact height H is 80 mm. Those skilled in the art can make adjustments according to the situation.

In another embodiment, referring to accompanying drawings 6-9, the implementation process of the method for determining the front boundary of the shading cover is described:

Referring to Figures 1-4, step S1: the installation of the front-view camera 1 and the hood 4 in the vehicle 2 is completed;

Referring to Figures 6-7, Step S2: According to the characteristic area of the instrument panel 7 that needs to be covered, such as the area where the instrument panel trim 8, head-up display 9, center speaker 10, and air outlet 11 are located in Figure 6, combine the instrument panel Putting items on 7 will form the area of harmful reflection on the front windshield 6, that is, the area that is greater than or equal to the impact height H from the front windshield 6. In this embodiment, H is 80mm, and the occlusion area EFGH is determined to be located at The position of the instrument panel surface of the front boundary EF of the occluded area is defined as the front boundary line;

Step S3: Referring to Fig. 7-8, analyze the optical path of the light emitted by the focal point O of the front-view camera 1, and obtain the light reflected by the inner surface of the front windshield 6 and directed to the front boundary line of step S3; the light path 12 is the path of the light emitted to the instrument panel 7 after reflection, wherein the straight line ST is a vertical line passing through the front boundary EF of the shielding area, and the point P where it intersects with the surface of the instrument panel 7 is on the front boundary line. The ray path 12 to P point position is QP, and the point that analyzes its reflection on the inner surface of front windshield 6 is Q point;

It should be noted that the optical path analysis can be carried out by using the CATIA of the French Dassault Company and the SPEOS simulation software of the French OPTIS Company.

Step S4: Take the junction position between the light path of step S3 and the lower base plate 401 of the hood 4 as the boundary line of the front end of the hood, and the plane in the vertical direction where the front boundary line of the hood is located is the front boundary 13 of the hood, refer to Fig. 7-8 As shown, the junction position between the QP and the lower base plate 401 of the sunshade 4 is the boundary line of the front end of the sunshade, and the plane in the vertical direction where the front boundary line is located is the vertical plane passing through the junction position. The position is determined, the front end of the sunshade 4 only needs to extend to the position of the front boundary 13 of the sunshade to meet the requirement of blocking stray light in the car, that is, the part of the sunshade 4 extending beyond the front boundary 13 of the sunshade in FIG. 3 can be cut off and removed. After truncation, as shown in FIG. 9 , a sunshield 4 of reduced size is obtained, which can prevent the light in the car from affecting the identification of the front-view camera 1 and can reduce the size.

In another embodiment, with reference to Figures 9-11, a vehicle includes a front-view camera 1, the front-view camera 1 is connected to the mounting base 5 of the interior rearview mirror of the vehicle 2, and a sunshade 4 is installed at the front end of the front-view camera 1 to shield light. The front end boundary of the cover 4 adopts the aforementioned method to determine the front end boundary, so that it does not have to be attached to the front windshield 6 .

In a further embodiment, as shown in FIGS. 10-11, a defrosting and defogging line 14 is installed on the inside of the front windshield 6, and the defrosting and defogging line is located in the shooting area of the front-view camera 1; The space surrounded by the windshield 6 is not closed, and the temperature difference inside and outside the car may cause fogging on the surface of the front windshield 6 in the shooting area of the front-view camera 1 in extreme weather, and the inner surface of the front windshield 6 in this small area The defrosting and defogging lines 14 are arranged to cope with the fogging situation, and then the image of the defrosting and defogging lines 14 in the imaging of the front-view camera 1 is subtracted by the software of the prior art.

Apparently, the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, rather than limiting the implementation of the present invention. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. It is not necessary and impossible to exhaustively list all the implementation manners here. All modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the claims of the present invention.

Claims (10)

1. A method for determining the lower boundary of the front-view camera field of view envelope boundary, characterized in that: comprise the following steps, determine the ground line where the vehicle is located; determine the blind zone target line, the blind zone target line is perpendicular to the ground line, and the vertical intersection point The distance between the projection point of the front end of the vehicle and the ground line is the distance of the blind zone; the plane where the line connecting the target line of the blind zone and the focal point of the front-view camera is the lower boundary of the envelope boundary of the field of view. 2. A method for determining the lower boundary of the front-view camera field of view envelope boundary according to claim 1, wherein the ground line is a one-person ground line. 3. A sunshade, characterized in that: the sunshade (4) is connected to the vehicle interior rearview mirror mounting base (5), and the sunshade (4) includes a lower base plate (401), a left vertical plate (402) ), right vertical plate (403) and rear vertical plate (404), the position of described lower bottom plate (401) is defined by the lower limit determined by the method described in claim 1 or 2; The rear vertical plate (404) is arranged at the front end of the front-view camera, and the rear vertical plate (404) is provided with an opening, the opening is located in front of the front-view camera lens, the lower base plate (401), the left vertical The rear ends of the board (402) and the right vertical board (403) are respectively connected with the rear vertical board (404), and the lower ends of the left vertical board (402) and the right vertical board (403) are respectively connected with the left and right sides of the lower bottom board (401). Connected on both sides. 4. A light shield according to claim 3, characterized in that: the vertical distance between the front end of the lower base plate (401) and the lower boundary of the envelope boundary of the field of view of the front-view camera is 2mm. 5. A method for determining the front boundary of the sunshade, characterized in that: comprising the following steps: Step S1: the front view camera and the hood according to claim 3 or 4 are arranged in the vehicle; Step S2: According to the characteristic area of the instrument panel that needs to be blocked, combined with the area where objects placed on the instrument panel will form harmful reflections on the front windshield, the occlusion area is determined, and the position of the instrument panel surface at the front boundary of the occlusion area is defined as front boundary line; Step S3: Analyze the optical path of the light emitted by the focal point of the front-view camera, and obtain the light reflected by the inner surface of the front windshield and directed to the front boundary line described in step S2; Step S4: The intersection of the path of the light in step S3 and the lower base plate (401) of the hood (4) is used as the boundary line of the front end of the hood, and the plane in the vertical direction where the boundary line of the front end of the hood is located is the front end of the hood boundary. 6 . The method for determining the front boundary of the sunshade according to claim 5 , wherein the features of the instrument panel in the step S2 include instrument panel decorations, a head-up display, a central speaker, and an air outlet. 7 . 7. A method for determining the front-end boundary of the sunshade according to claim 5, characterized in that: the characteristic area of the instrument panel that needs to be blocked in the step S2 is: the front end of the instrument panel near the front windshield is located vertically The facing plane is the dividing surface, which is located in the instrument panel area on the side away from the front windshield of the dividing surface; In the step S2, the area where objects placed on the instrument panel will form harmful reflections on the front windshield is: the area where the vertical distance between the instrument panel surface and the front windshield is greater than or equal to the influence height H. 8 . The method for determining the front boundary of the sunshield according to claim 7 , wherein the influence height H is 80 mm. 9. A vehicle, comprising a front-view camera, characterized in that: the front-view camera is connected to the vehicle interior rearview mirror mounting base, the front-end of the front-view camera is equipped with a light hood, and the front-end boundary of the light hood adopts the right The method for determining the front boundary of the light shield described in any one of 5-8 is required to be determined. 10 . The vehicle according to claim 9 , wherein a defrosting and defogging line is installed on the inner side of the front windshield, and the defrosting and defogging line is located in the shooting area of the front-view camera. 11 .