Adaptive photosensitive sunshade adjustment system and adjustment method

Abstract

The present invention discloses an adaptive photosensitive sun visor adjustment system, comprising a sun visor mechanism and an in-vehicle camera, wherein the sun visor mechanism comprises a fixed bracket connected to the vehicle body roof, wherein the fixed bracket is connected to the upper end of the first sun visor through a first rotating shaft, and the lower end of the first sun visor is connected to the upper end of the second sun visor through a second rotating shaft, and the first rotating shaft and the second rotating shaft are driven by a first rotating motor and a second rotating motor respectively. The present invention also discloses an adjustment method for an adaptive photosensitive sun visor adjustment system, which controls the angles of the first and second sun visors and the extension amount of the flexible sun visor layer according to the increase of the sun visor distance of the human eye to equal the optimal sun visor distance of the human eye and the decrease of the visual field distance of the human eye to equal the safe distance of the vehicle. The present invention automatically adjusts the sun visor to prevent the human eye from being stimulated by strong light while ensuring the driver's safe visual field, thereby improving driving safety.

Description

Technical Field

[0001] The invention relates to the technical field of automobile sun visor adjustment, and in particular to an adaptive photosensitive sun visor adjustment system and an adjustment method. Background Art

[0002] Vehicle sun visors are one of the necessary configurations of vehicles. In strong light environments, the driver or co-driver rotates the sun visor to block the light incident from the front windshield to the eye point, avoid glare, and ensure driving safety. However, currently on the market, traditional sun visors have two main shortcomings: on the one hand, they are manually adjusted, which does not conform to the development trend of intelligent vehicles; on the other hand, due to differences in height and driving habits, the sun visor is difficult to cover everyone's sunshade needs within the established rotation range.

[0003] Chinese patent CN201310568886.5 discloses a new type of automatic sunflower-style visor. The solution described in the patent is to receive sunlight and trigger the visor rotation mechanism to achieve the sunshade effect. However, there are two obvious problems: first, the trigger mechanism of the visor rotation mechanism is unclear, and it is impossible to achieve adaptive adjustment from the perspective of user needs; second, the adjustment position of the visor is unclear. Different users have different sitting positions, corresponding to different eye positions, so the required positions must be different. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and to provide an adaptive photosensitive sun visor adjustment system and adjustment method, which can automatically adjust the sun visor according to the light intensity and the position of the human eye to avoid the human eye from being stimulated by strong light while ensuring the driver's safe field of vision, thereby improving driving safety.

[0005] To achieve the above-mentioned objectives, the present invention provides an adaptive photosensitive sun visor adjustment system, including a sun visor mechanism and an in-vehicle camera, the sun visor mechanism including a fixed bracket connected to the vehicle body roof, the fixed bracket connected to the upper end of the first sun visor through a first rotating shaft, the lower end of the first sun visor is connected to the upper end of the second sun visor through a second rotating shaft, the first rotating shaft and the second rotating shaft are driven by a first rotating motor and a second rotating motor respectively, the first rotating motor, the second rotating motor and the in-vehicle camera are all communicatively connected to the sun visor controller.

[0006] The in-vehicle camera is used to obtain the light intensity of the human eye, the coordinates of the human eye and the distribution of the light intensity of the face. The sun visor controller is used to obtain the sunshade distance of the human eye according to the light intensity of the human eye, the coordinates of the human eye and the distribution of the light intensity of the face, and to control the rotation angle of the first rotating motor and the second rotating motor according to the sunshade distance of the human eye and the optimal sunshade distance of the human eye. The sunshade distance of the human eye is the distance from the light and shadow dividing line of the driver's face to the human eye.

[0007] Furthermore, the second sun visor is a light-transmitting filter plate, and a flexible sunshade layer is laid on the side of the second sun visor close to the outside of the vehicle. The flexible sunshade layer is made of opaque material, and both sides of the flexible sunshade layer are fixedly connected to flexible ropes, the upper end of the flexible rope is flush with the upper end of the flexible sunshade layer, and the lower end of the flexible rope extends out of the lower end of the flexible sunshade layer, the upper end of the flexible rope is connected to the first reel, and the lower end of the flexible rope is connected to the second reel.

[0008] Furthermore, the second rotating shaft is fixedly provided with a first roller motor, and the first roller is coaxially connected to the output shaft of the first roller motor; the lower end of the second sun visor is fixedly connected with a second roller motor, and the second roller is arranged on the output shaft of the second roller motor.

[0009] Furthermore, it also includes an external camera, which is used to obtain the road conditions ahead and the human eye field of view distance, and the human eye field of view distance is the distance from the boundary line of the field of view seen by the human eye through the lowermost end of the opaque part of the sun visor mechanism to the vehicle; the external camera, the first roller motor and the second roller motor are all communicatively connected to the sun visor controller.

[0010] The present invention also provides an adjustment method based on the above-mentioned adaptive photosensitive sunshade adjustment system, comprising:

[0011] Collect eye illumination intensity, face illumination intensity distribution, eye coordinates, and vehicle operation parameters.

[0012] When the light intensity of the human eye is greater than or equal to the set light intensity, the first sun visor is controlled to rotate downward, and the eye shading distance is obtained according to the eye coordinates and the light intensity distribution of the face; the eye field of view distance is obtained according to the eye coordinates, the vehicle coordinates, and the coordinates of the lowest boundary line of the opaque part of the sun visor mechanism; the vehicle safety distance is obtained according to the operating parameters of the vehicle and the operating parameters of the vehicle in front.

[0013] First event: the shading distance of the human eye increases to equal the optimal shading distance of the human eye.

[0014] Second event: The human eye's field of vision is reduced to the vehicle's safe distance.

[0015] Before the first sun visor rotates to a vertical state, when the first event occurs before the second event, the first sun visor is controlled to stop rotating, and the second sun visor and the flexible sun visor layer remain stationary.

[0016] Before the first sun visor rotates to a vertical state, when the second event occurs before the first event, the first sun visor is controlled to stop rotating, and the second sun visor is controlled to rotate downward so that the flexible sunshade layer does not completely cover the second sun visor, until the human eye shading distance is equal to the optimal sunshading distance of the human eye, the second sun visor is controlled to stop rotating.

[0017] Furthermore, when the first sun visor rotates to a vertical state, if neither the first event nor the second event occurs, the first sun visor is controlled to stop rotating, and the second sun visor is controlled to rotate downward and the flexible sunshade layer completely covers the second sun visor; when the first event occurs before the second event, the second sun visor is controlled to stop rotating and the flexible sunshade layer remains stationary; when the second event occurs before the first event, the second sun visor is controlled to continue rotating downward until the shading distance of the human eye is equal to the optimal shading distance of the human eye, and at the same time, the height of the lower end of the sunshade cloth is controlled to remain unchanged to keep the human eye field of view equal to the vehicle safety distance.

[0018] Furthermore, the method for obtaining the human eye shading distance includes extracting the brightness of multiple pixel points of the face according to the face illumination intensity distribution, and if the difference in brightness between the adjacent first pixel point and the second pixel point in the vertical direction is the largest, then marking the boundary between the first pixel point and the second pixel point as a light and shadow dividing point, connecting all the light and shadow dividing points to obtain the face light and shadow dividing line and its coordinates, and obtaining the human eye shading distance according to the coordinates of the human eye and the coordinates of the face light and shadow dividing line.

[0019] Furthermore, the optimal sun-shading distance for human eyes is calibrated according to the light intensity of human eyes, and the optimal sun-shading distance for human eyes is positively correlated with the light intensity of human eyes.

[0020] Furthermore, the method for determining the human eye field of view distance includes taking the human eye coordinates as the starting point, passing through the lowermost boundary line of the opaque part of the sun visor mechanism, and intersecting with the road surface or obstacle directly in front to obtain the human eye field of view boundary line, and obtaining the human eye field of view distance based on the coordinates of the human eye field of view boundary line and the coordinates of the vehicle.

[0021] Furthermore, the method for determining the vehicle safety distance includes calibrating it according to the vehicle speed and acceleration.

[0022] Beneficial effects of the present invention: intelligently adjust the sun visor to improve driving safety. The second sun visor of the present invention is a light-transmitting filter plate, and a retractable flexible sunshade layer is provided on the outside of the second sun visor. When the sunshade distance of the human eye increases to equal the optimal sunshade distance of the human eye, the sunshade is provided by the first sun visor or by the first sun visor plus the second sun visor completely covered by the flexible sunshade layer. At this time, the field of vision of the human eye meets the requirements of the vehicle safety distance; when the field of vision of the human eye decreases to equal the vehicle safety distance, the second sun visor is unfolded to perform auxiliary sunshade. At this time, the flexible sunshade layer is not unfolded or only a part of the second sun visor is blocked to meet the vehicle safety distance. Under the premise of ensuring that the field of vision of the human eye meets the vehicle safety distance, the present invention ensures that the sunshade distance of the human eye meets the requirements by automatically adjusting the sun visor and the flexible sunshade layer, avoids the human eye from being stimulated by strong light, and improves driving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the sun visor mechanism structure.

[0024] Figure 2 It is a schematic diagram of the structure of the second rotating shaft and the first scroll shaft.

[0025] Figure 3 It is a schematic structural diagram of the first rotating axis.

[0026] Figure 4 It is a schematic diagram of the structure of the regulating system of the present invention.

[0027] The components in the figure are numbered as follows: sun visor controller 100, in-vehicle camera 200, outside-vehicle camera 300, sun visor mechanism 400, fixed bracket 401, first rotating shaft 402, first sun visor 403, second rotating shaft 404, second sun visor 405, first reel 406, second reel 407, flexible sunshade layer 408, flexible rope 409, first rotating motor 410, second rotating motor 411, operating parameter acquisition module 500. DETAILED DESCRIPTION

[0028] The following specific implementations are used to further explain the technical solutions of the claims of the present invention in detail, so that those skilled in the art can more clearly understand the claims. The protection scope of the present invention is not limited to the following specific embodiments. The technical solutions of the claims of the present invention made by those skilled in the art but different from the following specific implementations are also within the protection scope of the present invention.

[0029] like Figures 1 to 4As shown, an adaptive photosensitive sun visor adjustment system includes a sun visor mechanism 400 and an in-vehicle camera 200. The sun visor mechanism 400 includes a fixed bracket 401 connected to the vehicle body roof, the fixed bracket 401 is connected to the upper end of a first sun visor 403 through a first rotating shaft 402, the lower end of the first sun visor 403 is connected to the upper end of a second sun visor 405 through a second rotating shaft 404, the first rotating shaft 402 and the second rotating shaft 404 are driven by a first rotating motor 410 and a second rotating motor 411 respectively, the first rotating motor 410, the second rotating motor 411 and the in-vehicle camera 200 are all communicatively connected to the sun visor controller 100, wherein the first sun visor 403 is an opaque plate that can completely block direct light.

[0030] The in-vehicle camera 200 is used to obtain the light intensity of the human eye, the coordinates of the human eye and the light intensity distribution of the face. The sun visor controller 100 is used to obtain the sunshade distance of the human eye according to the light intensity of the human eye, the coordinates of the human eye and the light intensity distribution of the face, and to control the rotation angle of the first rotating motor 410 and the second rotating motor 411 according to the sunshade distance of the human eye and the optimal sunshade distance of the human eye. The sunshade distance of the human eye is the distance from the light and shadow dividing line of the driver's face to the human eye. The rotation angle of the first sun visor and the second sun visor is controlled by whether the sunshade distance of the human eye reaches the optimal sunshade distance of the human eye, so that the human eye is prevented from being stimulated by strong light, thereby improving the clarity of the driver's vision and improving driving safety.

[0031] Among them, the optimal shading distance for human eyes is calibrated according to the light intensity of human eyes, and the optimal shading distance for human eyes is positively correlated with the light intensity of human eyes. Because if the human eyes are just blocked, when the human eyes look directly at the field of vision near the sun, they will still feel glare due to the excessive intensity of incident light. Therefore, different optimal shading distances for human eyes exist under different light intensities.

[0032] The second sun visor 405 is a light-transmitting filter plate, which can partially block the light directly hitting the human eye, thereby reducing the intensity of light entering the human eye. A flexible sunshade layer 408 is laid on the side of the second sun visor 405 close to the outside of the vehicle. The flexible sunshade layer 408 is made of an opaque material and can completely block the direct light entering the human eye. Both sides of the flexible sunshade layer 408 are fixedly connected to a flexible rope 409. The upper end of the flexible rope 409 is flush with the upper end of the flexible sunshade layer 408, and the lower end of the flexible rope 409 extends out of the lower end of the flexible sunshade layer 408. The upper end of the flexible rope 409 is connected to the first reel 406, and the lower end of the flexible rope 409 is connected to the second reel 407. Through the synchronous and same-direction rotation of the first scroll and the second scroll, the flexible sunshade layer can be driven to expand and contract along the length direction of the second sunshade plate. When the flexible sunshade layer does not completely cover the second sunshade plate, the flexible sunshade layer is completely rolled up and retracted by the first scroll. When the flexible sunshade layer completely covers the second sunshade plate, the lower end of the flexible sunshade layer is located on the first scroll, so that the flexible sunshade layer is completely unfolded downward.

[0033] The second rotating shaft 404 is fixedly provided with a first reel motor, and the first reel 406 is coaxially connected to the output shaft of the first reel motor; the lower end of the second sunshade 405 is fixedly connected to the second reel motor, and the second reel 407 is arranged on the output shaft of the second reel motor. In this way, when the second rotating shaft 404 rotates, the first reel 406 and the first reel motor can be synchronously driven to rotate, so that the flexible sunshade layer always remains parallel to the second sunshade, and the rotation of the second sunshade and the telescopic movement of the flexible sunshade layer can be relatively independent.

[0034] It also includes an external camera 300 and an operating parameter acquisition module 500. The external camera 300 is used to obtain the road condition ahead and the human eye field of view distance. The human eye field of view distance is the distance from the boundary line of the field of view seen by the human eye through the lowermost end of the opaque part of the sun visor mechanism 400 to the vehicle. For the driver, when the lower end of the flexible sunshade layer is not visible, the lowermost end of the opaque part of the sun visor mechanism 400 refers to the lower end of the first sun visor. When the lower end of the flexible sunshade layer is visible, the lowermost end of the opaque part of the sun visor mechanism 400 refers to the lowermost end of the flexible sunshade layer. The operating parameter acquisition module 500 is used to obtain the vehicle speed and acceleration. The external camera 300, the first roller motor and the second roller motor are all communicatively connected to the sun visor controller 100.

[0035] The adjustment method of the above-mentioned adaptive light-sensitive sunshade adjustment system is as follows:

[0036] 1. The in-vehicle camera 2 collects the light intensity of the human eye, the light intensity distribution of the face, and the coordinates of the human eye. The operating parameter acquisition module 500 collects the vehicle speed and acceleration, keeps the second sun visor 405 in a fully folded state, and makes the flexible sunshade layer 408 completely cover the second sun visor 405.

[0037] 2. When the illumination intensity of the human eye is greater than or equal to the set illumination intensity, it indicates that the sight of the human eye is affected by sunlight, and the first sun visor 403 is controlled to rotate downward. The sun visor controller 1 obtains the sunshade distance of the human eye according to the coordinates of the human eye and the illumination intensity distribution of the face; and obtains the visual field distance of the human eye according to the coordinates of the human eye, the coordinates of the vehicle, and the coordinates of the lowest boundary line of the opaque part of the sun visor mechanism 400; and obtains the vehicle safety distance according to the operating parameters of the vehicle and the operating parameters of the vehicle in front.

[0038] Among them, the method for obtaining the human eye shading distance is to extract the brightness of multiple pixel points of the face according to the distribution of facial illumination intensity. If the difference in brightness between the adjacent first pixel point and the second pixel point in the vertical direction is the largest, the boundary between the first pixel point and the second pixel point is marked as the light and shadow dividing point. All light and shadow dividing points are connected to obtain the face light and shadow dividing line and its coordinates, and the human eye shading distance is obtained according to the coordinates of the human eye and the coordinates of the face light and shadow dividing line.

[0039] The method for determining the human eye field of view distance is to take the human eye coordinates as the starting point, pass through the bottom boundary line of the opaque part of the sun visor mechanism 400, and intersect with the road surface or obstacle directly in front to obtain the human eye field of view boundary line, and obtain the human eye field of view distance based on the coordinates of the human eye field of view boundary line and the coordinates of the vehicle.

[0040] The method for determining the vehicle safety distance is to calibrate it based on the vehicle speed and acceleration. When the acceleration is constant, the greater the vehicle speed, the greater the vehicle safety distance. When the vehicle speed is constant, the greater the acceleration, the greater the vehicle safety distance.

[0041] Determine whether the first event and the second event occur, the first event is that the human eye shading distance increases to be equal to the optimal shading distance of the human eye; the second event is that the human eye field of view distance decreases to be equal to the vehicle safety distance.

[0042] 3.1 Before the first sun visor 403 rotates to the vertical state, when the first event occurs before the second event, the first sun visor 403 is controlled to stop rotating, and the second sun visor 405 and the flexible sunshade layer remain stationary.

[0043] 3.2 Before the first sun visor 403 rotates to a vertical state, when the second event occurs before the first event, the first sun visor 403 is controlled to stop rotating, and the second sun visor 405 is controlled to rotate downward so that the flexible sunshade layer 408 does not completely cover the second sun visor 405, until the sunshade distance of the human eye is equal to the optimal sunshade distance of the human eye, and the second sun visor 405 is controlled to stop rotating.

[0044] 3.3. When the first sun visor 403 rotates to a vertical state, if neither the first event nor the second event occurs, the first sun visor 403 is controlled to stop rotating, and the second sun visor 405 is controlled to rotate downward and the flexible sunshade layer 408 completely covers the second sun visor 405 .

[0045] In the case of step 3.3 above:

[0046] 4.1. When the first event occurs before the second event, the second sunshade 405 is controlled to stop rotating and the flexible sunshade layer 408 is kept stationary.

[0047] 4.2. When the second event occurs before the first event, the second sun visor 405 is controlled to continue to rotate downward until the sunshade distance of the human eye is equal to the optimal sunshade distance of the human eye. At the same time, the height of the lower end of the sunshade cloth is controlled to remain unchanged to keep the visual field distance of the human eye equal to the safe distance of the vehicle.

Claims

1. An adaptive light-sensitive sunshade adjustment system, Features: The invention comprises a sun visor mechanism (400) and an in-vehicle camera (200), wherein the sun visor mechanism (400) comprises a fixing bracket (401) connected to a vehicle body roof, wherein the fixing bracket (401) is connected to an upper end of a first sun visor (403) via a first rotating shaft (402), wherein a lower end of the first sun visor (403) is connected to an upper end of a second sun visor (405) via a second rotating shaft (404), wherein the first rotating shaft (402) and the second rotating shaft (404) are driven by a first rotating motor (410) and a second rotating motor (411) respectively, and the first rotating motor (410), the second rotating motor (411) and the in-vehicle camera (200) are all connected to a sun visor controller (100) for communication; The in-vehicle camera (200) is used to obtain the illumination intensity of human eyes, the coordinates of human eyes and the distribution of illumination intensity of human faces; the sun visor controller (100) is used to obtain the sunshade distance of human eyes according to the illumination intensity of human eyes, the coordinates of human eyes and the distribution of illumination intensity of human faces; and the rotation angles of the first rotating motor (410) and the second rotating motor (411) are controlled according to the sunshade distance of human eyes and the optimal sunshade distance of human eyes; the sunshade distance of human eyes is the distance from the light and shadow dividing line of the driver's face to the human eyes; A flexible sunshade layer (408) is laid on the side of the second sunshade (405) close to the outside of the vehicle. The second sunshade (405) is a light-transmitting filter plate. The flexible sunshade layer (408) is made of an opaque material. Both sides of the flexible sunshade layer (408) are fixedly connected to a flexible rope (409). The upper end of the flexible rope (409) is flush with the upper end of the flexible sunshade layer (408). The lower end of the flexible rope (409) extends out of the lower end of the flexible sunshade layer (408). The upper end of the flexible rope (409) is connected to the first reel (406), and the lower end of the flexible rope (409) is connected to the second reel (407). The second rotating shaft (404) is fixedly provided with a first reel motor, and the first reel (406) is coaxially connected to the output shaft of the first reel motor; the lower end of the second sunshade (405) is fixedly connected to the second reel motor, and the second reel (407) is arranged on the output shaft of the second reel motor.

2. The adaptive light-sensitive sun visor adjustment system according to claim 1, Features: It also includes an external camera (300) for acquiring the road conditions ahead and the visual field distance of a human eye, wherein the visual field distance of a human eye is the distance from the boundary line of the visual field seen from the bottom of the opaque part of the sun visor mechanism (400) to the vehicle; the external camera (300), the first reel motor and the second reel motor are all in communication connection with the sun visor controller (100).

3. A method for adjusting the adaptive photosensitive sunshade adjustment system according to claim 2, Features: Collect eye illumination intensity, face illumination intensity distribution, eye coordinates, and vehicle operation parameters; When the light intensity of the human eye is greater than or equal to the set light intensity, the first sunshade (403) is controlled to rotate downward, and the sunshade distance of the human eye is obtained according to the coordinates of the human eye and the light intensity distribution of the face; the visual field distance of the human eye is obtained according to the coordinates of the human eye, the coordinates of the vehicle, and the coordinates of the bottom boundary line of the opaque part of the sunshade mechanism (400); Obtaining a safe distance between vehicles based on the operating parameters of the vehicle and the vehicle ahead; First event: the shading distance of human eyes increases to equal the optimal shading distance of human eyes; Second event: the human eye's field of vision is reduced to the vehicle's safe distance; Before the first sun visor (403) rotates to a vertical state, when the first event occurs before the second event, the first sun visor (403) is controlled to stop rotating, and the second sun visor (405) and the flexible sun visor layer remain stationary; Before the first sun visor (403) rotates to a vertical state, when the second event occurs before the first event, the first sun visor (403) is controlled to stop rotating, and the second sun visor (405) is controlled to rotate downward so that the flexible sunshade layer (408) does not completely cover the second sun visor (405), until the sunshade distance of the human eye is equal to the optimal sunshade distance of the human eye, and then the second sun visor (405) is controlled to stop rotating.

4. The method for adjusting the adaptive photosensitive sunshade adjustment system according to claim 3, Features: When the first sun visor (403) rotates to a vertical state, if neither the first event nor the second event occurs, the first sun visor (403) is controlled to stop rotating, and the second sun visor (405) is controlled to rotate downward and the flexible sunshade layer (408) completely covers the second sun visor (405); When the first event occurs before the second event, controlling the second sunshade (405) to stop rotating and keeping the flexible sunshade layer (408) stationary; When the second event occurs before the first event, the second sun visor (405) is controlled to continue to rotate downward until the shading distance of the human eye is equal to the optimal shading distance of the human eye, and at the same time, the height of the lower end of the sunshade cloth is controlled to remain unchanged to keep the human eye field distance equal to the vehicle safety distance.

5. The method for adjusting the adaptive photosensitive sunshade adjustment system according to claim 3, Features: The method for obtaining the human eye shading distance includes extracting the brightness of multiple pixel points of the face according to the distribution of facial illumination intensity, and if the difference in brightness between the adjacent first pixel point and the second pixel point in the vertical direction is the largest, marking the boundary between the first pixel point and the second pixel point as a light and shadow dividing point, connecting all the light and shadow dividing points to obtain the face light and shadow dividing line and its coordinates, and obtaining the human eye shading distance according to the coordinates of the human eye and the coordinates of the face light and shadow dividing line.

6. The method for adjusting the adaptive light-sensitive sunshade adjustment system according to claim 3, Features: The optimal sun-shading distance for human eyes is calibrated according to the light intensity of human eyes, and the optimal sun-shading distance for human eyes is positively correlated with the light intensity of human eyes.

7. The method for adjusting the adaptive light-sensitive sunshade adjustment system according to claim 3, Features: The method for determining the distance of the human eye field of view comprises taking the human eye coordinates as a starting point, passing through the bottom boundary line of the opaque part of the sun visor mechanism (400), and intersecting with the road surface or obstacle directly in front to obtain the boundary line of the human eye field of view, and obtaining the distance of the human eye field of view according to the coordinates of the boundary line of the human eye field of view and the coordinates of the vehicle.

8. The method for adjusting the adaptive light-sensitive sunshade adjustment system according to claim 3, Features: The method for determining the vehicle safety distance includes calibrating it according to the vehicle speed and acceleration.

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