Vehicle A pillar blind area eliminating device

Abstract

The invention relates to the technical field of automobiles, in particular to a vehicle A column blind area eliminating device which comprises a first reflecting mirror and a first presenting mirror which are arranged on a left A column, and a second reflecting mirror and a second presenting mirror which are arranged on a right A column. The first reflecting mirror is used for acquiring an object image in a blind area of the right A column, and the object image is reflected and presented in the second presenting mirror for a driver to observe; the second reflecting mirror is used for acquiring an object image in a blind area of the left A column, and the object image is reflected and presented in the first presenting mirror for a driver to observe. The system has the advantages that the first reflecting mirror and the first presenting mirror are arranged on the left column A, the second reflecting mirror and the second presenting mirror are arranged on the right column A, and through cooperative imaging of the four mirrors, the first reflecting mirror and the second reflecting mirror independently receive and project light rays of blind areas on the opposite sides, so that the problem of view angle overlapping of traditional double mirrors is solved; and accurate separation and synchronous display of blind area images are realized.

Description

Technical Field

[0001] The invention relates to the technical field of automobiles, and in particular provides a device for eliminating the blind spot of an A-pillar of a vehicle. Background Art

[0002] The A-pillars of a vehicle are located on both sides of the front windshield and are important supporting components of the vehicle body structure. Due to their mechanical strength requirements, the A-pillars are usually thick (about 8cm wide), which causes blind spots when the driver turns left or right. According to the research of the International Society of Automotive Engineers (SAE), the angle of the blind spot B of the left A-pillar is about 6.8°, and the angle of the blind spot C of the right A-pillar is about 2.3° (e.g. Figure 1 This blind spot can easily block pedestrians, non-motor vehicles and other targets under complex road conditions, thereby increasing the risk of traffic accidents.

[0003] The existing technical solution is to use electronic cameras and display screens to eliminate the blind spots of the A-pillars. Wide-angle cameras (usually covering a 120°-180° field of view) are installed on the outside of the A-pillars on both sides of the vehicle or at the rearview mirror position to capture the blind spots blocked by the A-pillars in real time. The camera image is transmitted to the in-vehicle processor via a high-speed bus (such as CAN or LVDS), and the delay is controlled within 50 milliseconds to ensure that the image is synchronized with the driver's line of sight. At the same time, a flexible OLED or LCD display is embedded on the inside of the A-pillar to fit the curved surface of the A-pillar to maintain the consistency of the interior design. However, this solution has certain limitations. In extreme weather conditions (such as heavy rain and heavy fog), the imaging quality of the camera may be affected. In addition, this solution also relies on the power system, so a redundant power supply design is required to ensure safety. Due to the high cost, this configuration usually only appears in high-end models. Summary of the invention

[0004] In order to solve the above problems, the present invention provides a vehicle A-pillar blind spot elimination device, which can effectively solve the A-pillar blind spot problem through two reflective mirrors and two presenting mirrors and their optical principles.

[0005] To achieve the above-mentioned purpose, the technical solution created by the present invention is implemented as follows: a vehicle A-pillar blind spot elimination device, comprising: a first reflector and a first presenting mirror arranged on the left A-pillar, and a second reflector and a second presenting mirror arranged on the right A-pillar; the first presenting mirror is located below the first reflector; the second presenting mirror is located below the second reflector; the first reflector is used to obtain an image of an object in the blind spot of the right A-pillar, and presents it in the second presenting mirror after reflection for the driver to observe; the second reflector is used to obtain an image of an object in the blind spot of the left A-pillar, and presents it in the first presenting mirror after reflection for the driver to observe.

[0006] Furthermore, the first reflector, the first presenting mirror, the second reflector and the second presenting mirror are all connected to the corresponding A-pillars through respective adjustment devices; the adjustment devices are used to realize the circumferential rotation adjustment of the first reflector, the first presenting mirror, the second reflector and the second presenting mirror around the A-pillar and the pitch angle adjustment along the height of the A-pillar.

[0007] Furthermore, the adjustment device includes a steering seat, a silicone damping pad and a universal ball head; the steering seat has a accommodating cavity; the universal ball head includes a ball head and a connecting end, the ball head is embedded in the accommodating cavity, and the silicone damping pad is located between the accommodating cavity and the ball head.

[0008] Furthermore, the base materials of the first reflector and the second reflector are acrylic plates, and the outer surfaces thereof are plated with a hard coating; the base materials of the first presentation mirror and the second presentation mirror are acrylic plates, and the outer surfaces thereof are plated with an aluminum reflective film.

[0009] Furthermore, the hardness of the hard coating is ≥3H; the thickness of the aluminum reflective film is 50nm-80nm, and the reflectivity is ≥95%.

[0010] Furthermore, the first reflector, the first rendering mirror, the second reflector and the second rendering mirror are all off-axis aspheric reflectors, and the aspheric equation of the off-axis aspheric reflector is as follows: ; Among them, p is the distance between the aspheric surface and the human eye; c is the paraxial curvature, c=1 / r; r is the radius of curvature; K is the quadratic surface constant; A1, A2...An are high-order coefficients.

[0011] Furthermore, with the parabola as the initial structure of the first reflector, the first rendering mirror, the second reflector and the second rendering mirror, the angles between the zero field of view chief ray and the first reflector, the first rendering mirror, the second reflector and the second rendering mirror are calculated according to the focal length and the off-axis amount of the parabola: ; Where f' is the focal length of the parabola and de is the off-axis amount.

[0012] Furthermore, the equation of the parabola is as follows: x 2 + y 2 = 2pz; When x=0, p=2f', ; Among them, x represents the offset distance of the point on the parabola relative to the origin of the parabola in the left and right direction of the vehicle; y represents the offset distance of the point on the parabola relative to the origin of the parabola in the up and down direction of the vehicle; z represents the height of the point on the parabola along the optical axis, that is, the height of the point relative to the vertex of the parabola; p is the parabola parameter, and f' is the focal length of the parabola.

[0013] Furthermore, it also includes radars, which are respectively arranged on the outer surfaces of the left A-pillar and the right A-pillar.

[0014] Furthermore, it also includes an infrared sensor to assist nighttime imaging.

[0015] Compared with the prior art, the present invention can achieve the following beneficial effects: 1) A first reflector and a first presentation mirror are configured on the left A-pillar, and a second reflector and a second presentation mirror are configured on the right A-pillar. Through the collaborative imaging of the four mirrors, the first reflector and the second reflector independently receive and project the light of the opposite blind spot, eliminating the problem of overlapping viewing angles of traditional dual mirrors and achieving accurate separation and synchronous display of blind spot images.

[0016] 2) Based on the principle of pure optical reflection, it does not rely on electronic cameras and display screens. Extreme weather (heavy rain, heavy fog) does not affect the imaging effect. The reliability is significantly improved and the manufacturing cost is reduced.

[0017] 3) The first reflector, first rendering mirror, second reflector and second rendering mirror all use off-axis aspheric mirrors. These mirrors are optimized by using parabolic equations and combining off-axis amount, radius of curvature, focal length and other parameters to effectively reduce edge distortion, thereby ensuring imaging clarity and adaptability of field of view.

[0018] 4) Through the adjustment device, the first reflector, the first presentation mirror, the second reflector and the second presentation mirror can be quickly installed and dynamically adjusted to meet the viewing angle requirements of drivers of different heights.

[0019] 5) The base materials of the first reflector, the first presentation mirror, the second reflector and the second presentation mirror are made of lightweight and impact-resistant acrylic material to reduce the risk of secondary injuries in traffic accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of the blind area of ​​the A-pillar provided according to an embodiment of the present invention; Figure 2 is a schematic structural diagram of a vehicle A-pillar blind spot elimination device provided according to an embodiment of the present invention; Figure 3 Schematic diagram of the reflected light path of the vehicle A-pillar blind spot elimination device provided according to an embodiment of the present invention; Figure 4 is a schematic structural diagram of the installation of a right A-pillar, an adjustment device, and a second reflector according to an embodiment of the present invention; Figure 5 It is a schematic diagram of the structure of the regulating device provided according to an embodiment of the present invention.

[0021] The reference numerals therein include: 1, first reflector; 2, first presentation mirror; 3, second reflector; 4, second presentation mirror; 5, adjustment device; 51, steering seat; 511, accommodating cavity; 52, silicone damping pad; 53, universal ball head; 531, ball head; 532, connecting end. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the invention more clear, the invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the invention and do not constitute a limitation of the invention.

[0023] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0024] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0025] In the description of the invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the invention can be understood according to specific circumstances.

[0026] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0027] like Figures 1 to 5As shown, a vehicle A-pillar blind spot elimination device provided by an embodiment of the present invention includes: a first reflector 1 and a first presenting mirror 2 arranged on the left A-pillar, and a second reflector 3 and a second presenting mirror 4 arranged on the right A-pillar.

[0028] In the present invention, the A-pillar located on the driver's side is defined as a left A-pillar, and the A-pillar located on the passenger's side is defined as a right A-pillar.

[0029] The first presenting mirror 2 is located below the first reflecting mirror 1. The second presenting mirror 4 is located below the second reflecting mirror 3. The first reflecting mirror 1 is used to obtain the image of the object in the blind spot of the right A-pillar, which is reflected and presented in the second presenting mirror 4 for the driver to observe. The second reflecting mirror 3 is used to obtain the image of the object in the blind spot of the left A-pillar, which is reflected and presented in the first presenting mirror 2 for the driver to observe.

[0030] The height of the first reflector 1 and the second reflector 3 from the ground is 800mm-1200mm, and the specific position is adjusted according to the height of the driver. The height of the first presentation mirror 2 and the second presentation mirror 4 from the ground is determined by the height of the first reflector 1 and the second reflector 3 to ensure that the first presentation mirror 2 and the second presentation mirror 4 can clearly present the objects in the blind spot.

[0031] Further, the first reflector 1, the first rendering mirror 2, the second reflector 3 and the second rendering mirror 4 are all connected to the corresponding A-pillar through the adjustment device 5. The adjustment device 5 is used to realize the circumferential rotation adjustment of the first reflector 1, the first rendering mirror 2, the second reflector 3 and the second rendering mirror 4 around the A-pillar and the pitch angle adjustment along the height of the A-pillar.

[0032] The adjustment device 5 includes a steering seat 51, a silicone damping pad 52, and a universal ball head 53. The shape of the fixed end of the steering seat 51 is adapted to the outer surface of the A-pillar, and is fixed to the corresponding A-pillar by a high-strength adhesive. The open end of the steering seat 51 has a receiving cavity 511. In some embodiments, the fixed end of the steering seat 51 is magnetically attracted, and the steering seat 51 is adsorbed on the corresponding A-pillar by magnetic force.

[0033] The universal ball head 53 includes a ball head 531 and a connecting end 532. The ball head 531 is embedded in the accommodating cavity 511. The silicone damping pad 52 is located between the accommodating cavity 511 and the ball head 531. The silicone damping pad 52 plays a role of shock absorption and damping. The connecting end 532 is connected to the corresponding first reflector 1, the first presentation mirror 2, the second reflector 3 or the second presentation mirror 4. The connecting end 532 has an external thread, and the first reflector 1, the first presentation mirror 2, the second reflector 3 and the second presentation mirror 4 all have an internal thread that matches the external thread. In some embodiments, the universal ball head 53 realizes circumferential rotation adjustment around the A-pillar and pitch angle adjustment along the height of the A-pillar through a gear rack mechanism. To achieve more precise angle adjustment.

[0034] In some embodiments, the adjustment device 5 does not include a steering seat 51. At this time, a cavity matching the shape of the ball head 531 is opened on the left A-pillar and the right A-pillar, and the silicone damping pad 52 is located between the cavity and the ball head 531, thereby achieving the same adjustment function.

[0035] In this embodiment, the substrates of the first reflector 1 and the second reflector 3 are acrylic plates, and the outer surfaces thereof are plated with a hard coating, and the hardness of the hard coating is ≥ 3H. The reflectivity of the first reflector 1 and the second reflector 3 is ≥ 95%.

[0036] The substrates of the first display mirror 2 and the second display mirror 4 are acrylic plates, and the outer surfaces thereof are plated with aluminum reflective films. The thickness of the aluminum reflective films is 50nm-80nm, and the reflectivity is ≥95%. The adhesion of the aluminum reflective films must pass the hundred-grid test (ASTM D3359).

[0037] In one embodiment, the substrates of the first reflector 1 , the second reflector 3 , the first presentation mirror 2 , and the second presentation mirror 4 may be made of polycarbonate (PC) or a glass substrate coated with an explosion-proof film.

[0038] Furthermore, the first reflector 1, the first rendering mirror 2, the second reflector 3 and the second rendering mirror 4 are all off-axis aspheric reflectors, and the aspheric equation of the off-axis aspheric reflector is as follows: ; Among them, p is the distance between the aspheric surface and the human eye; c is the paraxial curvature, c=1 / r; r is the radius of curvature; K is the quadratic surface constant; A1, A2...An are high-order coefficients.

[0039] According to the spherical reflector object image position formula: ,in, l is the object distance, l’ is the image distance. l When it is infinite, the radius of curvature r of the reflector is the image distance l’ twice, that is r=2l’ .

[0040] In this embodiment, assuming that the object in the blind spot of the left A-pillar is 1000 mm away from the front of the vehicle, that is, the curvature radius r of the first reflector 1 is 2000 mm, then the curvature c=1 / r=0.0005 -1 mm. Known, K =−0.917, A 4 =6.502×10 -6 , which can be obtained by the aspheric equation x The value of .

[0041] Furthermore, the paraboloids are used as the initial structures of the first reflector 1, the first rendering mirror 2, the second reflector 3 and the second rendering mirror 4, and according to the focal length, off-axis amount, reflection angle of the zero field of view chief ray, and the distance from the intersection point to the ideal image point of the paraboloids of the first reflector 1, the first rendering mirror 2, the second reflector 3 and the second rendering mirror 4, respectively. l ad The surface shape and off-axis amount of each parabola are controlled by key parameters such as φ, φ, and φ. The intersection point here refers to the position where the zero-field chief ray intersects with the surface of the first reflector 1 or the first presenting mirror 2 or the second reflector 3 or the second presenting mirror 4. The ideal image point refers to the point where the zero-field chief ray should theoretically converge after passing through the first reflector 1 or the first presenting mirror 2 or the second reflector 3 or the second presenting mirror 4.

[0042] Specifically, the angles between the zero field of view chief ray and the first reflector 1, the first rendering mirror 2, the second reflector 3 and the second rendering mirror 4 are calculated according to the focal length and off-axis amount of the parabola: ; Where f' is the focal length of the parabola and de is the off-axis amount.

[0043] Furthermore, the equation of the parabola is as follows: x 2 + y 2 = 2pz; When x=0, p=2f', ; Among them, x represents the offset distance of the point on the parabola relative to the origin of the parabola in the left and right direction of the vehicle; y represents the offset distance of the point on the parabola relative to the origin of the parabola in the up and down direction of the vehicle; z represents the height of the point on the parabola along the optical axis, that is, the height of the point relative to the vertex of the parabola; p is the parabola parameter, and f' is the focal length of the parabola.

[0044] In this embodiment, the off-axis amount of the first rendering mirror 2 (i.e., the distance from the installation position to the ground) is 500 mm, and the parabolic focal length of the first rendering mirror 2 is 1000 mm, then the angle between the zero field of view chief ray and the first rendering mirror 2 is 28°.

[0045] The vehicle A-pillar blind spot elimination device also includes radars respectively arranged on the outer surfaces of the left A-pillar and the right A-pillar. When the radar detects an object or a person in the blind spot, it will immediately send out a warning signal. After receiving the warning signal, the driver can observe through the first presentation mirror 2 or the second presentation mirror 4 to confirm the situation in the blind spot.

[0046] The vehicle A-pillar blind spot elimination device also includes an infrared sensor for assisting nighttime imaging to make up for the limitations of the present invention in low-light environments.

[0047] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A vehicle A-pillar blind spot elimination device, characterized in that: include: A first reflector and a first presenting mirror are arranged on the left A-pillar, and a second reflector and a second presenting mirror are arranged on the right A-pillar; the first presenting mirror is located below the first reflector; and the second presenting mirror is located below the second reflector; The first reflector is used to obtain an image of an object in the blind spot of the right A-pillar, and present it in the second presenting mirror after reflection for the driver to observe; The second reflector is used to obtain the image of the object in the blind spot of the left A-pillar, and present it in the first presenting mirror after reflection for the driver to observe.

2. The vehicle A-pillar blind spot elimination device according to claim 1, characterized in that: The first reflector, the first presentation mirror, the second reflector and the second presentation mirror are all connected to the corresponding A-pillar via respective adjustment devices; The adjustment device is used to realize circumferential rotation adjustment of the first reflector, the first presentation mirror, the second reflector and the second presentation mirror around the A-pillar and pitch angle adjustment along the height of the A-pillar.

3. The vehicle A-pillar blind spot elimination device according to claim 2, characterized in that: The adjusting device comprises a steering seat, a silicone damping pad and a universal ball head; the steering seat has a receiving cavity; the universal ball head comprises a ball head and a connecting end, the ball head is embedded in the receiving cavity, and the silicone damping pad is located between the receiving cavity and the ball head.

4. The vehicle A-pillar blind spot elimination device according to claim 1, characterized in that: The substrates of the first reflector and the second reflector are acrylic plates, and the outer surfaces thereof are plated with a hard coating; The substrates of the first presentation mirror and the second presentation mirror are acrylic plates, and the outer surfaces thereof are plated with aluminum reflective films.

5. The vehicle A-pillar blind spot elimination device according to claim 4, characterized in that: The hardness of the hard coating is ≥3H; the thickness of the aluminum reflective film is 50nm-80nm, and the reflectivity is ≥95%.

6. The vehicle A-pillar blind spot elimination device according to claim 1, characterized in that: The first reflector, the first rendering mirror, the second reflector and the second rendering mirror are all off-axis aspheric reflectors, and the aspheric equation of the off-axis aspheric reflector is as follows: ； Among them, p is the distance between the aspheric surface and the human eye; c is the paraxial curvature, c=1 / r; r is the radius of curvature; K is the quadratic surface constant; A1, A2...An are high-order coefficients.

7. The vehicle A-pillar blind spot elimination device according to claim 6, characterized in that: Taking the parabola as the initial structure of the first reflector, the first rendering mirror, the second reflector and the second rendering mirror, the angles between the zero field of view chief ray and the first reflector, the first rendering mirror, the second reflector and the second rendering mirror are calculated according to the focal length and the off-axis amount of the parabola: ； Where f' is the focal length of the parabola and de is the off-axis amount.

8. The vehicle A-pillar blind spot elimination device according to claim 7, characterized in that: The equation of a parabola is: x 2 + y 2 = 2pz; When x=0, p=2f', ; Among them, x represents the offset distance of the point on the parabola relative to the origin of the parabola in the left and right direction of the vehicle; y represents the offset distance of the point on the parabola relative to the origin of the parabola in the up and down direction of the vehicle; z represents the height of the point on the parabola along the optical axis, that is, the height of the point relative to the vertex of the parabola; p is the parabola parameter, and f' is the focal length of the parabola.

9. The vehicle A-pillar blind spot elimination device according to claim 1, characterized in that: It also includes radars, which are respectively arranged on the outer surfaces of the left A-pillar and the right A-pillar.

10. The vehicle A-pillar blind spot elimination device according to claim 1, characterized in that: An infrared sensor is also included to aid nighttime imaging.

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