Optical detection device for windshield

Abstract

The utility model discloses an optical detection device for a windshield. The optical detection device comprises a rack, and at least one camera, a camera fixing assembly, an imaging assembly and a windshield fixing assembly which are arranged on the rack. The windshield is fixed through the windshield fixing assembly and obliquely arranged on the rack. The camera fixing assembly comprises a first support and a second support, the first support is in a plate shape and is matched with the inner side wall of the windshield, at least one installation part is formed at one end of the second support, the other end of the second support is fixedly installed on the rack, and the at least one camera is fixed to the second support through the at least one installation part. The imaging assembly comprises a third support and an imaging plate which is installed on the third support and corresponds to the at least one camera in position. When optical detection of the windshield is carried out, an imaging plate image collected after the camera penetrates through the windshield and is refracted is compared with an actual image, so that secondary image deviation and optical distortion of the windshield are obtained.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts detection, in particular to an optical detection device for a windshield. Background Art

[0002] With the rapid development of smart cars, many cars are equipped with ADAS (Advanced Driving Assistance System) functions. The ADAS camera is integrated on the windshield through a bracket, and the camera shoots images outside the car through laminated glass. For safety reasons, regulations require that the windshield must be composed of two pieces of laminated glass. Since the windshield has a certain thickness and many large curved surfaces on the surface, there is usually a certain degree of light distortion on the windshield. In addition, there are unstable factors in the glass manufacturing process, which to a certain extent affects the quality of the images taken by the ADAS camera, and then affects the algorithm's judgment of the objects in front.

[0003] In the prior art, the windshield inspection method is to take a small number of samples and measure the secondary image deviation and optical distortion of the front windshield in the laboratory. If the measured value falls within the required range, the entire batch is judged to be qualified. It is impossible to monitor the optical quality of each windshield 100%. If an optical simulation inspection is performed on each windshield, it will take a lot of time and cost. Therefore, the optical inspection method for windshields in the prior art has a technical problem of low inspection efficiency while meeting the inspection accuracy. Utility Model Content

[0004] The utility model aims to solve the technical problem that the optical detection method for windshield in the prior art has low detection efficiency under the premise of meeting the detection accuracy.

[0005] To solve the above technical problems, an embodiment of the utility model discloses an optical inspection device for a windshield, which includes a stand, and at least one camera, a camera fixing assembly, an imaging assembly, and a windshield fixing assembly arranged on the stand.

[0006] The windshield is fixed by a windshield fixing assembly and is tiltedly arranged on the stand.

[0007] The camera fixing assembly includes a first bracket and a second bracket, the first bracket is plate-shaped and adapted to the inner wall of the windshield, and at least one shading area is formed on the side of the first bracket facing the windshield, and the at least one shading area corresponds one-to-one to at least one camera, at least one camera is fixed on the first bracket, at least one mounting portion is formed at one end of the second bracket, and the other end is fixedly mounted on the stand, and the at least one camera is fixed to the second bracket through at least one mounting portion.

[0008] The imaging assembly comprises a third bracket and an imaging plate. The imaging plate is mounted on the platform through the third bracket and is located at a position outside the windshield and corresponding to at least one camera.

[0009] With the above technical solution, when assembling the optical inspection device for the windshield, firstly, according to the specific model and specification of the windshield, a corresponding windshield fixing assembly is set to fix the windshield on the stand at an angle to simulate the scene of the windshield being assembled on the car, and further, a camera is fixed on the first bracket, and then at least one camera is fixed on the second bracket, the second bracket is fixed on the stand, and the first bracket is placed on the inner surface of the windshield. A light shielding area is formed on the first bracket to simulate the scene when the camera is actually assembled on the windshield, and the imaging plate is set on the outer side of the windshield and at a position corresponding to the camera through the third bracket.

[0010] When performing optical inspection of the windshield, the image of the imaging plate collected by the camera after refraction through the windshield is compared with the actual image of the imaging plate, so as to obtain the secondary image deviation and light distortion of the windshield and judge whether it is qualified. This optical inspection device more accurately simulates the imaging effect of the camera assembled on the actual vehicle by setting a first bracket attached to the windshield, thereby improving the inspection accuracy. In addition, this optical inspection device can conveniently complete the assembly of the windshield, thereby greatly reducing the optical inspection process of the windshield and improving the inspection efficiency.

[0011] The embodiment of the utility model further discloses an optical detection device for a windshield, wherein at least one camera comprises a high-order camera and a low-order camera which are arranged at intervals.

[0012] Mounting openings are formed on the first bracket at corresponding positions of the high-order camera and the low-order camera, and buckles are set on the edges of the mounting openings. The high-order camera and the low-order camera are fixed to the corresponding mounting openings by the buckles, and the outer contours of the shading areas corresponding to the high-order camera and the low-order camera are both fan-shaped.

[0013] By adopting the above technical solution, the first bracket can simultaneously install the high-end camera and the low-cost camera on the inner side of the windshield, so as to simultaneously detect the deviation of the secondary image and the light distortion of the two cameras passing through the windshield, ensuring that the optical properties of the windshield shipped from the factory meet the requirements and improving the detection efficiency. In addition, the fan-shaped shading area can well facilitate the imaging of the camera.

[0014] The embodiment of the utility model further discloses an optical detection device for a windshield, wherein a sealing portion is provided at least at an edge of a light shielding area of ​​the first bracket.

[0015] By adopting the above technical solution, a sealing part is provided at the edge of the shading area. On the one hand, the shading effect can be improved to prevent residual light from entering the shading area from the edge of the shading area and affecting the imaging of the camera; on the other hand, the sealing part can prevent external impurities from entering the shading area and ensure the accuracy of the image captured by the camera.

[0016] The embodiment of the utility model further discloses an optical detection device for a windshield, wherein the sealing portion is configured as flocking laid around the outer edge of the shading area.

[0017] By adopting the above technical solution, flocking is only laid around the outer edge of the shading area, which saves materials and reduces costs while ensuring the shading effect. In addition, the flocking is soft and will not leave scratches on the surface of the windshield.

[0018] The embodiment of the utility model further discloses an optical inspection device for a windshield, wherein the second bracket comprises a support arm, a mounting arm connected to the support arm, and a mounting cavity formed at one end of the mounting arm, and the support arm is fixedly connected to the stand.

[0019] Among them, the installation cavity constitutes an installation part, the installation cavity is adapted to the high-order camera, and the installation cavity is provided with installation holes on the side walls at least in the length direction and the width direction of the high-order camera. The high-order camera is fixedly connected to the installation holes of the installation cavity by fasteners.

[0020] Furthermore, a gasket is arranged between each fastener and the side wall of the edge of the mounting hole of the mounting cavity.

[0021] By adopting the above technical solution, the second bracket is fixedly connected to the stand through the mounting arm, and the mounting cavity at one end of the support arm of the second bracket is fixedly connected to the high-order camera, which can ensure that the high-order camera and the low-order camera installed on the first bracket can maintain a relatively stable posture to collect images during detection, avoiding shaking during detection, thereby improving the detection accuracy. In addition, when disassembling and assembling, it is only necessary to fix or remove the fixation between the high-order camera and the second bracket, which greatly simplifies the repeated preparation work.

[0022] An embodiment of the utility model further discloses an optical detection device for a windshield, wherein a third bracket extends in a direction away from at least one camera, and the third bracket has a plurality of connection parts arranged at intervals in a direction facing the at least one camera, and an imaging plate is fixedly connected to one of the plurality of connection parts.

[0023] By adopting the above technical solution, the connection position between the imaging board and the connecting part on the third bracket is changed, the distance between the imaging boards is adjusted, and the imaging effect of the camera at different distances is detected, thereby improving the detection accuracy.

[0024] The embodiment of the utility model further discloses an optical detection device for a windshield, the optical detection device also includes a color plate with black and white grids alternately arranged on the surface, the color plate is arranged on the surface of the imaging plate facing at least one camera.

[0025] Alternatively, the optical detection device further comprises a projection element, the surface of the imaging plate facing the at least one camera forms a screen, the projection element is arranged on a third bracket, and is located between the at least one camera and the imaging plate, and the projection element projects onto the screen.

[0026] With the above technical solution, since the surface of the color plate is alternately arranged with black and white grids, the color difference is obvious, which makes it easier to analyze the difference between the image captured by the camera and the actual pattern on the color plate.

[0027] By using a projector to project onto the screen, it is possible to customize the pattern on the screen by controlling the projector (for example, displaying pedestrians or roadblocks on the screen), thereby more closely matching the image captured by the camera through the windshield in actual use.

[0028] The embodiment of the utility model also discloses an optical inspection device for a windshield, wherein the windshield fixing assembly includes centering positioning members located on a stand and arranged in pairs on both sides of the windshield in the width direction, and the centering positioning members on both sides respectively abut against the side edges of the corresponding sides of the windshield.

[0029] By adopting the above technical solution, by setting the center positioning parts on both sides of the windshield in the width direction, it can be ensured that during detection, the windshield is always located at a preset position in the width direction, making the installation position of the windshield and the camera more accurate.

[0030] The embodiment of the utility model further discloses an optical detection device for a windshield, and the windshield fixing assembly further comprises:

[0031] The bottom support member is located on the platform and arranged at the bottom of the windshield, and the bottom support member abuts against the bottom of the windshield to support the windshield.

[0032] A plurality of support ball heads are arranged on the platform and at intervals on the outer periphery of the windshield. The plurality of support ball heads abut against the inner surface of the windshield at the edge.

[0033] By adopting the above technical solution and providing a bottom support member and a plurality of support ball heads, the windshield can be stably fixed on the test stand during testing, thereby ensuring the testing accuracy.

[0034] The embodiment of the utility model further discloses an optical detection device for a windshield, wherein the first bracket is made of a plastic material, and the second bracket is made of a metal material.

[0035] With the above technical solution, the first bracket made of plastic material is lighter while ensuring the strength of the assembled camera. Since the bracket used when the camera is assembled on the actual vehicle is also made of plastic, the working condition of the camera installed on the inside of the windshield is more restored. The second bracket made of metal material has higher structural strength and is more durable, extending the service life of the detection device.

[0036] The beneficial effects of the utility model are:

[0037] The utility model discloses an optical inspection device for a windshield, which includes a stand, and at least one camera, a camera fixing assembly, an imaging assembly, and a windshield fixing assembly arranged on the stand. The windshield is fixed by the windshield fixing assembly and is obliquely arranged on the stand. The camera fixing assembly includes a first bracket and a second bracket, the first bracket is plate-shaped and adapted to the inner side wall of the windshield, and one end of the second bracket forms at least one mounting portion, and the other end is fixedly mounted on the stand, and at least one camera is fixed on the second bracket through at least one mounting portion. The imaging assembly includes a third bracket and an imaging plate installed on the third bracket at a position corresponding to at least one camera. When performing optical inspection of the windshield, the imaging plate image collected by the camera after refraction through the windshield is compared with the actual image, so as to obtain the secondary image deviation and light distortion of the windshield.

[0038] The optical detection device can more accurately simulate the imaging effect of a camera mounted on a real vehicle by setting a first bracket attached to the windshield. In addition, the optical detection device can conveniently complete the assembly of the windshield, thereby greatly reducing the optical detection process and improving the detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 A schematic structural diagram of an optical inspection device for a windshield provided in an embodiment of the utility model;

[0040] Figure 2Another schematic diagram of the structure of the optical inspection device for windshield provided by the embodiment of the utility model;

[0041] Figure 3 A schematic structural diagram of a stand, a windshield and a windshield fixing assembly of an optical inspection device for a windshield provided in an embodiment of the utility model;

[0042] Figure 4 A schematic diagram of the structure of a camera fixing assembly of an optical inspection device for a windshield provided by an embodiment of the utility model;

[0043] Figure 5 A schematic structural diagram of a first bracket of an optical inspection device for a windshield provided by an embodiment of the utility model, close to a side of the windshield;

[0044] Figure 6 A schematic structural diagram of a first bracket of an optical inspection device for a windshield provided by an embodiment of the utility model, which is away from the windshield;

[0045] Figure 7 A schematic diagram of the structure of a camera of an optical inspection device for a windshield provided by an embodiment of the utility model;

[0046] Figure 8 A schematic structural diagram of a high-order camera and a second bracket of an optical inspection device for a windshield provided by an embodiment of the utility model;

[0047] Fig. 9 A schematic diagram of the structure of an imaging component of an optical inspection device for a windshield provided by an embodiment of the utility model;

[0048] Fig.10 Another structural schematic diagram of an imaging assembly of an optical inspection device for a windshield provided by an embodiment of the utility model;

[0049] Fig.11 A schematic diagram of a structure of a control component of an optical inspection device for a windshield provided by an embodiment of the utility model;

[0050] Fig.12 A schematic diagram of the principle of detecting secondary image deviation by an optical detection device for a windshield provided by an embodiment of the utility model;

[0051] Fig.13 This is a schematic diagram of the principle of detecting light distortion of the optical detection device for the windshield provided in an embodiment of the utility model.

[0052] Description of reference numerals:

[0053] 10. Optical inspection device for windshield;

[0054] 110. Stand;

[0055] 120, camera; 121, high-end camera; 122, low-end camera;

[0056] 130. Camera fixing assembly;

[0057] 131, first bracket; 132, second bracket; 133, light shielding area; 134, mounting portion;

[0058] 135, mounting opening; 136, sealing portion; 137, supporting arm; 138, mounting arm; 139, gasket;

[0059] 140. Imaging components;

[0060] 141. third bracket; 142. imaging plate; 143. color plate; 144. projection element; 145. screen;

[0061] 150. Windshield fixing assembly;

[0062] 151, centering positioning member; 152, bottom supporting member; 153, supporting ball head;

[0063] 160. Control components;

[0064] 161. computing host; 162. input device; 163. display device;

[0065] 20. Windshield. DETAILED DESCRIPTION

[0066] In the prior art, the windshield inspection method is to take a small number of samples and measure the secondary image deviation and optical distortion of the front windshield in the laboratory. If the measured value falls within the required range, the entire batch is judged to be qualified. It is impossible to monitor the optical quality of each windshield 100%. If an optical simulation inspection is performed on each windshield, it will take a lot of time and cost. Therefore, the optical inspection method for windshields in the prior art has a technical problem of low inspection efficiency while meeting the inspection accuracy.

[0067] In order to solve the above technical problems, the embodiment of the utility model discloses an optical inspection device for a windshield, which includes a stand, and at least one camera, a camera fixing assembly, an imaging assembly, and a windshield fixing assembly arranged on the stand. The windshield is fixed by the windshield fixing assembly and is tiltedly arranged on the stand. The camera fixing assembly includes a first bracket and a second bracket, the first bracket is plate-shaped and adapted to the inner side wall of the windshield, and one end of the second bracket forms at least one mounting portion, and the other end is fixedly mounted on the stand, and at least one camera is fixed on the second bracket by at least one mounting portion. The imaging assembly includes a third bracket and an imaging plate, and the imaging plate is mounted on the stand through the third bracket, located on the outside of the windshield and at a position corresponding to at least one camera. When performing optical inspection of the windshield, the imaging plate image collected by the camera after refraction through the windshield is compared with the actual image of the imaging plate, so as to obtain the secondary image deviation and light distortion of the windshield, and judge whether it is qualified.

[0068] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0069] like Figure 1 and Figure 2 As shown, the embodiment of the utility model discloses an optical inspection device 10 for a windshield, which includes a stand 110, and at least one camera 120, a camera fixing assembly 130, an imaging assembly 140, and a windshield fixing assembly 150 arranged on the stand 110. It should be noted that the number of the cameras 120 can be one, two, three or other numbers, and those skilled in the art can design it according to actual conditions and specific needs, and this embodiment does not specifically limit this.

[0070] Among them, Figure 3 As shown, the windshield 20 is fixed by the windshield fixing assembly 150 and is tiltedly arranged on the stand 110. It should be noted that the reason why the windshield 20 is tiltedly arranged on the stand 110 is to simulate the posture of the windshield 20 actually loaded on the vehicle body. Therefore, the tilt angle of the windshield 20 relative to the vertical direction is between 15° and 75° (for example, the tilt angle of the windshield 20 of a car is relatively large, which can be 75°, 70° or 65°, while the tilt angle of the windshield 20 of a multi-purpose vehicle (MPV) is relatively small, which can be 15°, 20° or 27°). Those skilled in the art can design it according to actual conditions and specific needs, and this embodiment does not make specific limitations on this.

[0071] Specifically, Figure 4-Figure 8As shown, the camera fixing assembly 130 includes a first bracket 131 and a second bracket 132. The first bracket 131 is plate-shaped and is adapted to the inner wall of the windshield 20. At least one shading area 133 is formed on the side of the first bracket 131 facing the windshield 20. The at least one shading area 133 corresponds one-to-one with at least one camera 120. At least one camera 120 is fixed on the first bracket 131. At least one mounting portion 134 is formed at one end of the second bracket 132, and the other end is fixedly mounted on the stand 110. At least one camera 120 is fixed to the second bracket 132 via at least one mounting portion 134.

[0072] The imaging assembly 140 includes a third bracket 141 and an imaging board 142 . The imaging board 142 is mounted on the platform 110 through the third bracket 141 and is located outside the windshield 20 and at a position corresponding to the at least one camera 120 .

[0073] More specifically, when assembling the optical inspection device 10 for windshield, firstly, according to the specific model and specification of the windshield 20, the corresponding windshield fixing assembly 150 is set, so as to fix and tilt the windshield 20 on the stand 110, simulating the scene of the windshield 20 being assembled on the car, and further, the camera 120 is fixed on the first bracket 131, and then at least one camera 120 is fixed on the second bracket 132, the second bracket 132 is fixed on the stand 110, and the first bracket 131 is placed on the inner surface of the windshield 20. Among them, a light shielding area 133 is formed on the first bracket 131 to simulate the scene when the camera 120 is actually assembled on the windshield 20, and the imaging board 142 is arranged on the outer side of the windshield 20 and at a position corresponding to the camera 120 through the third bracket 141.

[0074] Furthermore, if Figure 7 As shown, the embodiment of the utility model further discloses an optical inspection device 10 for a windshield, wherein at least one camera 120 includes a high-order camera 121 and a low-order camera 122 arranged at intervals. The difference between the high-order camera 121 and the low-order camera 122 is that the two are suitable for different roles in the auxiliary driving system, and the pixels of the two are different. Regarding the specific model and specification of the camera 120, those skilled in the art can design it according to the actual situation and specific needs, and this embodiment does not specifically limit this.

[0075] Specifically, Figure 5 and Figure 6As shown, a mounting opening 135 is formed on the first bracket 131 at corresponding positions of the high-order camera 121 and the low-order camera 122, and a buckle is set on the edge of the mounting opening 135. The high-order camera 121 and the low-order camera 122 are fixed to the corresponding mounting opening 135 by the buckle, and the outer contours of the shading areas 133 corresponding to the high-order camera 121 and the low-order camera 122 are both fan-shaped.

[0076] More specifically, the first bracket 131 can simultaneously mount the high-end camera 121 and the low-cost camera 120 on the inner side of the windshield 20, so that the secondary image deviation and light distortion of the two cameras 120 passing through the windshield 20 can be detected simultaneously, ensuring that the optical properties of the windshield 20 shipped from the factory meet the requirements and improving the detection efficiency. In addition, the fan-shaped shading area 133 can facilitate the imaging of the camera 120.

[0077] Furthermore, if Figure 5 As shown, the embodiment of the utility model further discloses an optical detection device 10 for a windshield, and the first bracket 131 is provided with a sealing portion 136 at least at the edge of the light-shielding area 133. It should be noted that the sealing portion 136 can be set as a sticker, a gasket or flocking or other components in the field that meet the sealing requirements. Those skilled in the art can design it according to actual conditions and specific requirements, and this embodiment does not make specific limitations on this. Among them, when the sealing portion 136 is set as a sticker, it can not only meet the sealing requirements in the light-shielding area 133, but also play a role in connecting the first bracket 131 and the windshield 20. For example, when the first bracket 131 is set as a bracket for actually assembling the camera 120 to the inner side of the windshield 20, the sealing portion 136 is set as a sticker.

[0078] Specifically, by providing a sealing portion 136 at the edge of the shading area 133, on the one hand, the shading effect can be improved to prevent residual light from entering the shading area 133 from the edge of the shading area 133 and affecting the imaging of the camera 120; on the other hand, the sealing portion 136 can prevent external impurities from entering the shading area 133, thereby ensuring the accuracy of the image captured by the camera 120.

[0079] Furthermore, the embodiment of the utility model further discloses an optical inspection device 10 for a windshield, wherein the sealing portion 136 is configured as flocking laid around the outer edge of the light shielding area 133. It should be noted that in order to facilitate the laying of flocking on the outer edge of the light shielding area 133, there is a gap greater than or equal to 2.5 mm between the first bracket 131 and the inner surface of the windshield 20.

[0080] Specifically, flocking is only laid around the outer edge of the shading area 133, which saves materials and reduces costs while ensuring the shading effect. In addition, the flocking is soft and will not leave scratches on the surface of the windshield 20.

[0081] Of course, in another embodiment, the flocking is not only laid around the outer edge of the light-shielding area 133 , but also on the inner surface of the first bracket 131 located in the light-shielding area 133 .

[0082] Furthermore, if Figure 8 As shown, an embodiment of the utility model further discloses an optical inspection device 10 for a windshield, wherein the second bracket 132 includes a support arm 137, a mounting arm 138 connected to the support arm 137, and a mounting cavity formed at one end of the mounting arm 138, and the support arm 137 is fixedly connected to the stand 110.

[0083] Among them, the installation cavity constitutes the installation part 134, the installation cavity is adapted to the high-order camera 121, and the installation cavity is provided with installation holes on the side walls at least in the length direction and the width direction of the high-order camera 121, and the high-order camera 121 is fixedly connected to the installation holes of the installation cavity by fasteners.

[0084] And, if Figure 4 As shown, a gasket 139 is provided between each fastener and the side wall of the edge of the mounting hole of the mounting cavity.

[0085] Specifically, the second bracket 132 is fixedly connected to the stand 110 through the mounting arm 138, and the mounting cavity at one end of the support arm 137 of the second bracket 132 is fixedly connected to the high-order camera 121, which can ensure that the high-order camera 121 and the low-order camera 122 installed on the first bracket 131 can maintain a relatively stable posture to collect images during detection, avoiding shaking during detection, thereby improving detection accuracy. In addition, when disassembling, it is only necessary to fix or remove the fixation between the high-order camera 121 and the second bracket 132, which greatly simplifies repeated preparation work.

[0086] In another embodiment, when the external light source is relatively single and has no stray light, such as Figure 8 As shown, the camera fixing assembly 130 may only include the second bracket 132, and the camera 120 may be fixed on the stand 110 through the second bracket 132. Alternatively, the camera fixing assembly 130 may be configured as a mechanical arm, and the position of the camera 120 may be flexibly controlled by the mechanical arm.

[0087] Furthermore, the embodiment of the utility model also discloses an optical detection device 10 for a windshield, wherein the third bracket 141 extends in a direction away from at least one camera 120, and the third bracket 141 is provided with a plurality of connection parts (not shown in the figure) at intervals in the direction facing at least one camera 120, and the imaging plate 142 is fixedly connected to one of the plurality of connection parts. It should be noted that the third bracket 141 may be provided with two, three, four or other number of connection parts at intervals in the direction facing the camera 120, and the interval between two adjacent connection parts is in the range of 30 mm to 150 mm, that is, the interval between two adjacent connection parts may be 30 mm, 50 mm, 80 mm, 100 mm or 150 mm, and the interval between two adjacent connection parts may be equal intervals or unequal intervals. Those skilled in the art may design according to actual conditions and specific needs, and this embodiment does not specifically limit this.

[0088] Specifically, by changing the connection position between the imaging board 142 and the connection part on the third bracket 141 and adjusting the distance between the imaging board 142, the imaging effect of the detection camera 120 at different distances is detected, thereby improving the detection accuracy.

[0089] Furthermore, if Figure 1 and Fig. 9 As shown, an embodiment of the utility model further discloses an optical inspection device 10 for a windshield, the optical inspection device also includes a color plate 143 with black and white grids alternately arranged on the surface, and the color plate 143 is arranged on the surface of the imaging plate 142 facing the at least one camera 120.

[0090] Specifically, since the surface of the color plate 143 is alternately arranged with black and white grids, the color difference is obvious, which makes it easier to analyze the difference between the image captured by the camera 120 and the actual pattern on the color plate 143 .

[0091] In another embodiment, if Figure 2 and Fig.10 As shown, the optical detection device also includes a projection element 144, and the surface of the imaging plate 142 facing the at least one camera 120 forms a screen 145. The projection element 144 is arranged on the third bracket 141 and is located between the at least one camera 120 and the imaging plate 142, and the projection element 144 projects onto the screen 145.

[0092] By using the projection element 144 to project onto the screen 145 , the pattern on the screen 145 can be customized by controlling the projection element 144 (for example, pedestrians or roadblocks can be displayed on the screen 145 ), thereby being more consistent with the image captured by the camera 120 through the windshield 20 in actual use.

[0093] Furthermore, if Figure 1-Figure 3As shown, an embodiment of the utility model further discloses an optical inspection device 10 for a windshield, wherein a windshield fixing assembly 150 includes a centering positioning member 151 located on a stand 110 and arranged in pairs on both sides of the width direction of the windshield 20, and the centering positioning members 151 on both sides respectively abut against the side edges of the corresponding sides of the windshield 20.

[0094] Specifically, by providing the centering positioning members 151 on both sides of the windshield 20 in the width direction, it can be ensured that during detection, the windshield 20 is always located at a preset position in the width direction, so that the installation position of the windshield 20 and the camera 120 is more accurate.

[0095] Furthermore, the embodiment of the utility model further discloses an optical inspection device 10 for a windshield, and the windshield fixing assembly 150 further includes:

[0096] The bottom support 152 is located on the stand 110 and is provided at the bottom of the windshield 20. The bottom support 152 abuts against the bottom of the windshield 20 to support the windshield 20. In addition, the bottom support 152 can also fix the windshield 20 in a direction in which the windshield 20 is tilted.

[0097] A plurality of support ball heads 153 are disposed on the stand 110 and at intervals on the outer periphery of the windshield 20, and the plurality of support ball heads 153 are all in contact with the inner surface of the windshield 20 at the edge. Among them, four, six, seven, ten, thirteen or eighteen support ball heads 153 may be disposed at intervals on the outer periphery of the windshield 20, and the plurality of support ball heads 153 can fix the windshield 20 in the vertical direction.

[0098] Specifically, by providing the bottom support member 152 and the plurality of support ball heads 153 , the windshield 20 can be stably fixed on the stand 110 during detection, thereby ensuring detection accuracy.

[0099] It should be noted that, in this embodiment, the specific structures of the various fixing and positioning parts mentioned in the windshield fixing assembly 150 can be designed by those skilled in the art according to actual conditions and specific needs, and this embodiment does not make any specific limitations on this.

[0100] More specifically, Figure 3 As shown, in this embodiment, the stand 110 is configured as a structure formed by splicing multiple steel materials, a plane for placing other detection equipment is formed on the upper part of the stand 110, and multiple pulleys are provided on the lower part of the stand 110 to facilitate pushing the stand 110 to move.

[0101] Furthermore, the embodiment of the utility model further discloses an optical inspection device 10 for a windshield, wherein the first bracket 131 is made of a plastic material, and the second bracket 132 is made of a metal material.

[0102] Specifically, the first bracket 131 made of plastic material is lighter in texture while ensuring the strength of the camera 120. Since the bracket used when the camera 120 is assembled on the actual vehicle is also made of plastic, the working condition of the camera 120 installed on the inside of the windshield 20 is more restored. The second bracket 132 made of metal material has higher structural strength and is more durable, extending the service life of the detection device. It should be noted that in some embodiments, the first bracket 131 used by the optical detection device is the bracket used when the camera 120 is assembled on the actual vehicle.

[0103] More specifically, the first bracket 131 can be made of polyethylene, or polypropylene, or nylon 6. Furthermore, in order to improve the strength of the first bracket 131, 15% of glass fiber can be added to nylon 6. The second bracket 132 can be made of iron, aluminum, titanium or other metal alloys. Those skilled in the art can design it according to actual conditions and specific needs, and this embodiment does not specifically limit this.

[0104] Furthermore, if Figure 1 , Figure 2 and Fig.11 As shown, in this embodiment, the optical inspection device 10 for the windshield 20 further includes a control assembly 160, and the control components include a computing host 161 (such as a microcomputer), an input component 162 (such as a mouse and keyboard), and a display component 163 (such as a display) arranged on the stand 110. The inspection personnel can input parameters through the input component 162, and after calculation by the built-in program of the computing host 161, the result of determining whether the secondary image deviation and optical distortion of the image are qualified can be read from the display component 163. Regarding the models and specifications of the various parts of the control components, those skilled in the art can design them according to actual conditions and specific needs, and this embodiment does not specifically limit this.

[0105] In summary, the embodiment of the utility model discloses an optical inspection device 10 for a windshield. When the optical inspection device 10 for a windshield is used, the imaging plate 142 is first fixed to the stand 110 through the third bracket 141, and then the high-order camera 121 and the low-order camera 122 are fixed to the first bracket 131, and then the high-order camera 121 is fixed to the stand 110 through the second bracket 132. Finally, the windshield 20 is fixed to the stand 110 through the windshield fixing assembly 150 to complete the assembly of the inspection device. The optical inspection of the windshield 20 begins, and the camera 120 captures a virtual image through the windshield 20, and transmits the virtual image to the computing host 161 in the form of data.

[0106] Taking the high-order camera 121 as an example, the deviation of the secondary image of the camera 120 passing through the windshield 20 is calculated, and the specific formula is as follows:

[0107]

[0108] Among them, Fig.12 As shown, y t , n is the total width of the main image and the secondary image of the graphics (circle and line) during the nth detection, y m , n The width of the main image of the figure (circle and line) during the nth detection, D g , n is the ghost angle at the nth detection. g , n It can indicate whether the deviation of the secondary image of the camera 120 through the windshield 20 is qualified. For example, when D g , n When D is greater than the first predetermined value, it means that the secondary image of the camera 120 through the windshield 20 deviates greatly and the windshield 20 is unqualified. g , n When it is less than or equal to the first predetermined value, it means that the deviation of the secondary image of the camera 120 through the windshield 20 is small, and the windshield 20 is qualified.

[0109] Furthermore, multiple tests are performed, as shown in the following formula:

[0110] D g，max =Max{D g，1 , D g，2 , …D g，n-1 , D g，n}

[0111] From the ghosting angles obtained from multiple tests, take the maximum ghosting angle D g , max , if D g ,max When it is less than or equal to the first predetermined value, the secondary image deviation of the camera 120 through the front windshield 20 is qualified.

[0112] Similarly, taking the high-order camera 121 as an example, the light distortion of the camera 120 passing through the windshield 20 is calculated, and the specific formula is as follows:

[0113]

[0114] Among them, Fig.13 As shown, O is the center point of the actual figure, P n is a point on the corner of the actual figure during the nth detection, V n When it is the nth detection, P on the imaging graph n The corresponding point, OP n It is O and P n The distance between n It is O and V n The distance between d , n is the optical distortion rate at the nth detection, D d , n It can indicate whether the light distortion of the camera 120 through the windshield 20 is qualified. For example, when D d , n When D is greater than the second predetermined value, it means that the light distortion rate of the camera 120 through the windshield 20 is large, and the windshield 20 is unqualified. d , n When it is less than or equal to the second predetermined value, it means that the light distortion rate of the camera 120 passing through the windshield 20 is small, and the windshield 20 is qualified.

[0115] Furthermore, multiple tests are performed, as shown in the following formula:

[0116] D d，max =Max{D d，1 , D d，2 , …D d，n-1 , D d，n}

[0117] From the light distortion rates obtained from multiple tests, take the maximum light distortion rate D d , max , if D d , max When the light distortion rate of the camera 120 passing through the front windshield 20 is qualified.

[0118] Therefore, only when the secondary image deviation and light distortion of the camera 120 through the windshield 20 are qualified, the windshield 20 meets the use requirements. It should be noted that the specific values ​​of the first preset value and the second preset value can be designed by those skilled in the art according to actual conditions and specific requirements, and this embodiment does not specifically limit this.

[0119] It should be noted that, in addition to the implementation methods of the utility model described in the above-mentioned specific specific embodiments, those skilled in the art can easily understand other advantages and functions of the utility model from the contents disclosed in this specification. Although the description of the utility model is introduced in conjunction with the preferred embodiment, this does not mean that the features of this utility model are limited to this implementation method. On the contrary, the purpose of introducing the utility model in conjunction with the implementation method is to cover other options or modifications that may be extended based on the claims of the utility model. In order to provide an in-depth understanding of the utility model, the above description contains many specific details, and the utility model can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the utility model, some specific details will be omitted in the description. It should be noted that, in the absence of conflict, the embodiments in the utility model and the features in the embodiments can be combined with each other.

[0120] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0121] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply 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 utility model.

[0122] The terms “first”, “second”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0123] In the description of this embodiment, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connected", and "connected" 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 this embodiment can be understood according to specific circumstances.

[0124] Although the present invention has been illustrated and described with reference to certain preferred embodiments of the present invention, it should be understood by those skilled in the art that the above contents are further detailed descriptions of the present invention in combination with specific embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. Those skilled in the art may make various changes in form and details, including making several simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. An optical inspection device for a windshield, characterized in that: It includes a stand, and at least one camera, a camera fixing component, an imaging component, and a windshield fixing component arranged on the stand; wherein, The windshield is fixed by the windshield fixing assembly and is obliquely arranged on the stand; The camera fixing assembly comprises a first bracket and a second bracket, the first bracket is plate-shaped and adapted to the inner side wall of the windshield, and at least one light shielding area is formed on a side of the first bracket facing the windshield, the at least one light shielding area corresponds to the at least one camera one-to-one, the at least one camera is fixed to the first bracket, one end of the second bracket forms at least one mounting portion, and the other end is fixedly mounted on the platform, and the at least one camera is fixed to the second bracket through the at least one mounting portion; The imaging assembly comprises a third bracket and an imaging plate. The imaging plate is mounted on the stand through the third bracket and is located outside the windshield and at a position corresponding to the at least one camera.

2. The optical inspection device for windshield according to claim 1, characterized in that: The at least one camera includes a high-order camera and a low-order camera disposed at intervals; Mounting openings are formed on the first bracket at corresponding positions of the high-order camera and the low-order camera, and buckles are set on the edges of the mounting openings. The high-order camera and the low-order camera are fixed to the corresponding mounting openings by the buckles, and the outer contours of the shading areas corresponding to the high-order camera and the low-order camera are both fan-shaped.

3. The optical inspection device for windshield according to claim 2, characterized in that: The first bracket is provided with a sealing portion at least at an edge of the light-shielding area.

4. The optical inspection device for windshield according to claim 3, characterized in that: The sealing portion is configured as flocking laid around the outer edge of the shading area.

5. The optical inspection device for windshield according to claim 2, characterized in that: The second bracket includes a support arm, a mounting arm connected to the support arm, and a mounting cavity formed at one end of the mounting arm, and the support arm is fixedly connected to the stand; wherein, The mounting cavity constitutes the mounting portion, the mounting cavity is adapted to the high-order camera, the mounting cavity is provided with mounting holes at least on the side walls in the length direction and the width direction of the high-order camera, and the high-order camera is fixedly connected to the mounting holes of the mounting cavity by fasteners; and A gasket is arranged between each of the fasteners and the side wall of the edge of the mounting hole of the mounting cavity.

6. The optical inspection device for windshield according to claim 1, characterized in that: The third bracket extends in a direction away from the at least one camera, and the third bracket is provided with a plurality of connection parts at intervals in a direction facing the at least one camera, and the imaging plate is fixedly connected to one of the plurality of connection parts.

7. The optical inspection device for windshield according to claim 6, characterized in that: The optical detection device further comprises a color plate with black and white grids arranged alternately on its surface, wherein the color plate is arranged on the surface of the imaging plate facing the at least one camera; or The optical detection device also includes a projection component, and the surface of the imaging plate facing the at least one camera forms a screen. The projection component is arranged on the third bracket and located between the at least one camera and the imaging plate, and the projection component projects onto the screen.

8. The optical inspection device for windshield according to any one of claims 1 to 7, characterized in that: The windshield fixing assembly includes center positioning members located on the stand and arranged in pairs on both sides of the windshield in the width direction, and the center positioning members on both sides are respectively abutted against the side edges of the corresponding sides of the windshield.

9. The optical inspection device for windshield according to claim 8, characterized in that: The windshield fixing assembly also includes: A bottom support member located on the stand and arranged at the bottom of the windshield, wherein the bottom support member abuts against the bottom of the windshield to support the windshield; A plurality of support ball heads are disposed on the stand and at intervals on the outer periphery of the windshield. The plurality of support ball heads abut against the inner surface of the windshield at the edge.

10. The optical inspection device for windshield according to any one of claims 1 to 7, characterized in that: The first bracket is made of plastic material, and the second bracket is made of metal material.

Images