A view zoom device, method, and test equipment for an advanced driver assistance system.

Abstract

This invention discloses a view scaling device, method, and testing equipment for an advanced driver assistance system. It includes: a linear module, a projection module, a lens module, a display module, and a support module. One surface of the display module is a display plane. The lens module is disposed in front of the lens of the camera under test. The projection module is mounted on the linear module and moves along a straight line on the linear module. The second optical axis of the projection module is coplanar with the first optical axis. The projection module is used to adjust the view size projected onto the display plane. The support module is further used to, after adjusting the view size on the display module, adjust the intersection point of the first optical axis and the display module to coincide with the center of the view. The technical solution provided by this invention can reduce the size of the display module, achieve view scaling, and meet the testing needs of various types of cameras.

Description

Technical Field

[0001] This invention relates to the field of vehicle camera simulation testing technology, and in particular to a view zoom device, method, and testing equipment for advanced driver assistance systems. Background Technology

[0002] As a key component, vehicle cameras are increasingly being used in intelligent driving vehicles. To ensure stable operation, various functional cameras in intelligent driving vehicles need to undergo extensive simulation testing and verification.

[0003] In existing simulation testing schemes, a long detection distance is usually required to ensure the integrity of the information captured by the camera under test, which greatly increases the manufacturing cost. Although the detection distance is reduced in the scheme using lenses, the field scaling process is still insufficient. Summary of the Invention

[0004] This invention provides a view scaling device, method, and testing equipment for advanced driver assistance systems, which reduces the size of the view scaling device, achieves view scaling, and meets the testing needs of various types of cameras.

[0005] In a first aspect, embodiments of the present invention provide a view zooming device, comprising: a linear module, a projection module, a lens module, a display module, and a support module; one surface of the display module is a display plane;

[0006] The support module is disposed on one side of the display plane and is used to support the camera under test, so that the first optical axis of the camera under test is perpendicular to the display plane; the lens module is disposed in front of the lens of the camera under test and is used to shorten the detection distance between the camera under test and the display plane.

[0007] The projection module is mounted on the linear module and moves along a straight line on the linear module. The projection module is used to adjust the viewing size projected onto the display plane. The second optical axis of the projection module is coplanar with the first optical axis. When the projection module moves closer to the display module, the viewing size projected onto the display plane decreases. When the projection module moves away from the display module, the viewing size projected onto the display plane increases.

[0008] The support module is also used to adjust the intersection of the first optical axis and the display plane to coincide with the center of the view projected on the display plane after adjusting the view size on the display module.

[0009] Optionally, the second optical axis of the projection module has an angle with the display plane, and the angle is between 0 and 90°.

[0010] Optionally, the lens module is a relay mirror.

[0011] Optionally, the size of the display plane is larger than the viewing area.

[0012] Optionally, the support module includes a first slider, a first guide rail, and a support frame; the support frame is arranged perpendicular to the horizontal plane, the first guide rail is disposed on the support frame, and the camera under test is mounted on the first guide rail via the first slider; wherein, the extension direction of the first guide rail is perpendicular to the first optical axis.

[0013] Optionally, the support module further includes a second guide rail, a second slider, and a support platform; the extension direction of the second guide rail is parallel to the first optical axis, and the support frame is mounted on the second guide rail via the second slider.

[0014] Optionally, the view zoom device further includes a fixed bracket, on which the display module is mounted, and the fixed bracket is used to keep the display plane perpendicular to the horizontal plane.

[0015] Secondly, embodiments of the present invention provide a view scaling method, executed by any of the view scaling devices described in the embodiments of the present invention, the method comprising:

[0016] S1. Align the first optical axis of the camera under test with the display module;

[0017] S2. The lens module is placed in front of the lens of the camera under test;

[0018] S3. The projection module moves along a straight line on the straight line module. When the projection module moves closer to the display module, the size of the view projected on the display plane decreases. When the projection module moves away from the display module, the size of the view projected on the display plane increases.

[0019] S4. After adjusting the viewing size on the display module, the support module adjusts the intersection of the first optical axis and the display plane to coincide with the center of the viewing image projected on the display plane.

[0020] Thirdly, embodiments of the present invention provide a test device for an advanced driver assistance system, including any of the view zoom devices described in the embodiments of the present invention.

[0021] The technical solution provided by this invention reduces the size of the view scaling device by adding a lens module in front of the camera under test and shortening the detection distance between the camera under test and the display plane. Furthermore, by moving the projection module in a straight line, the distance between the projection module and the display module is changed, thereby achieving view scaling and adjusting the screen size to meet the testing needs of various types of cameras. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of a view zooming device provided in an embodiment of the present invention.

[0023] Figure 2 This is a schematic diagram illustrating the movement of the view center in an embodiment of the present invention.

[0024] Figure 3 This is a flowchart illustrating a view scaling method provided in an embodiment of the present invention. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] As a key component, automotive cameras are increasingly used in autonomous vehicles. To ensure stable operation, the various cameras in these vehicles require extensive testing and verification. Laboratory simulation testing methods project images onto a screen or large display to simulate actual test scenarios. Some cameras are long-range cameras, with a minimum detection distance generally greater than 3 meters and a field of view generally greater than 30°. Calculations using the Pythagorean theorem require a display larger than 100 inches to ensure the recorded scene is completely captured by the camera, significantly increasing manufacturing difficulty and cost.

[0027] In view of this, Figure 1 This is a schematic diagram of a view zooming device provided in an embodiment of the present invention. See also: Figure 1 The view zoom device includes: a linear module 110, a projection module 120, a lens module 130, a display module 140, and a support module 150; one surface of the display module is a display plane 141.

[0028] The support module 150 is disposed on one side of the display plane of the display module 140. The support module 150 is used to support the camera under test, so that the first optical axis 307 of the camera under test is perpendicular to the display plane 141.

[0029] The lens module 130 is disposed in front of the lens of the camera under test. The lens module 130 is used to shorten the detection distance between the camera under test and the display plane 141.

[0030] The projection module 120 is mounted on the linear module 110 and moves along a straight line on the linear module 110. The second optical axis 121 of the projection module 120 is coplanar with the first optical axis 307. The projection module 120 is used to adjust the viewing size projected onto the display plane 141. When the projection module 120 moves closer to the display module 140, the viewing size projected onto the display plane 141 decreases; when the projection module 120 moves away from the display module 140, the viewing size projected onto the display plane 141 increases.

[0031] The support module 150 is also used to adjust the intersection of the first optical axis 307 and the display module 140 to coincide with the center of the view after adjusting the view size on the display module 140.

[0032] Specifically, the display requirements for mobile phone lens simulation testing and vehicle camera simulation testing differ. Mobile phone lens testing primarily involves changing the resolution chart to verify the lens, with relatively low display requirements. However, vehicle camera simulation testing requires playing a large amount of video. Therefore, the display module 140 can be a monitor or projection screen to ensure the quality of the test image playback. The display module 140 and support module 150 are arranged in parallel. The camera under test is mounted on the support module 150, and the first optical axis 307 of the camera under test is perpendicular to the display plane 141 of the display module 140. The first optical axis 307 is the axis of symmetry of the field of view of the camera under test, i.e., the center line of the field of view column. A lens module 130 is added in front of the lens of the camera under test. The lens module 130 increases the field of view of the camera under test. Therefore, compared with the case without the lens module 130, the detection distance between the camera under test and the display plane 141 can be shortened when testing the same scene size.

[0033] The projection module 120 can project test videos onto the display plane 141 of the display module 140. For example, the projection module 120 can be a projector or similar device. The projection module 120 is mounted on the linear module 110, which provides a linear running track. The projection module 120 can move linearly along this track. The second optical axis 121 of the projection module 120 intersects the display plane 141. The second optical axis 121 and the first optical axis 307 are on the same plane. Since the first optical axis 307 is perpendicular to the display plane 141, the plane containing the first optical axis 307 and the second optical axis 121 is perpendicular to the display plane 141. Therefore, the intersection of the plane containing the second optical axis 121 and the first optical axis 307 with the display plane 141 can bisect the display image. By adjusting to an appropriate viewing size, it can be ensured that the area information captured by the camera under test in the width direction is complete.

[0034] For example, the projection module 120 can extend horizontally along a straight line, meaning its second optical axis 121 is perpendicular to the display plane 141. Since the image projected by the projection module 120 has a certain emission angle, the view size presented on the display plane 141 decreases when the projection module 120 moves closer to the display plane 141, and increases when the projection module 120 moves away from the display plane 141. By determining the parameters of the camera under test, the required view size can be determined, and the camera can be adjusted to an appropriate view size. The height of the camera under test or the height of the support module 150 can be adjusted so that the intersection of the first optical axis 307 and the display plane 141 is located at the center of the view. Furthermore, by adjusting the detection distance between the camera under test and the display plane 141, the integrity of the area information observed by the camera under test can be ensured.

[0035] For example, the projection module 120 extends in a straight line and forms an angle with the display plane 141. That is, the second optical axis 121 of the projection module 120 forms an angle with the display plane 141, which is an acute angle within 90°. Figure 1 As shown. Similarly, since the image projected by the projection module 120 has a certain emission angle, when the projection module 120 moves closer to the display plane 141, the view size presented on the display plane 141 shrinks; when the projection module 120 moves away from the display plane 141, the view size presented on the display plane 141 increases. Once the parameters of the camera under test are determined, the required view size can be obtained. Adjusting to an appropriate view size involves adjusting the height of the camera under test or the height of the support module 150, ensuring that the intersection of the first optical axis 307 and the display plane 141 is located at the center of the view. Furthermore, by adjusting the detection distance between the camera under test and the display plane 141, the completeness of the area information observed by the camera under test is ensured.

[0036] The technical solution provided by this invention reduces the size of the scene scaling device by adding a lens module in front of the camera under test and shortening the detection distance between the camera under test and the display plane. Furthermore, by moving the projection module in a straight line, the distance between the projection module and the display module is changed, thereby scaling the scene size. The screen size can be adjusted to meet the testing needs of various types of cameras.

[0037] Preferably, the second optical axis 121 of the projection module 120 forms an angle with the display plane 141, and the angle between the second optical axis 121 and the display plane 141 ranges from 0° to 90°. (Continue to see...) Figure 1 For example, the linear module 110 and the projection module 120 are disposed on top of the display module 140. The second optical axis 121 forms an angle with the display plane 141. When the projection module 120 moves from the first position 4022 to the second position 4021, the size of the view presented on the display module 140 is reduced. Because the second optical axis 121 forms an angle with the display plane 141, the center of the view presented at the second position 4021 is moved upward by Y1 compared to the center of the view at the first position 4022. Figure 2 This is a schematic diagram illustrating the movement of the view center in an embodiment of the present invention. See also: Figure 2 When the projection module 120 is in the first position 4022, the viewing size of the first view 24 on the display plane 141 is D2. When the projection module 120 is in the second position 4021, the viewing size of the second view 14 on the display plane 141 is D1. When the projection module 120 moves from the first position 4022 to the second position 4021, the viewing center of the second view 14 is moved upward by a distance Y1 compared to the viewing center of the first view 24. Therefore, it is necessary to adjust the camera under test, moving the first optical axis 307 upward by a distance Y1, so that the intersection of the first optical axis 307 and the display plane 141 coincides with the corresponding viewing center. At the same time, the detection distance between the camera under test and the display plane 141 should be adjusted to ensure that the area information observed by the camera under test is complete.

[0038] Optionally, lens module 130 is a relay mirror.

[0039] Specifically, in existing technologies for testing long-focal-length cameras, such as front-facing cameras, different focal lengths and angles require additional zoom lenses. These zoom lenses are mainly convex lenses or lens groups. Convex lenses are prone to image distortion, and lens groups are generally custom-developed for specific cameras, resulting in long development cycles and high complexity. In Advanced Driving Assistance System (ADAS) testing, repeater mirrors are used instead of lens groups. The camera under test sees a magnified image through the repeater mirror, thereby reducing the detection distance of the optical box. Repeater mirrors are widely used in mobile phone lens testing; they are readily available and only require selection, reducing the development cycle and debugging difficulty of lens groups.

[0040] Optionally, the size of the display plane 141 is larger than the viewing size. Specifically, in ADAS testing, when testing multiple cameras under test, the viewing size requirements of multiple cameras under test need to be met simultaneously in one test chamber. After replacing the camera under test and the corresponding repeater lens, the display plane 141 of the display module 140 should ensure compatibility with any viewing size. Therefore, the size of the display plane 141 needs to be larger than the largest test viewing size to cover each viewing size and ensure the integrity of the area information observed by the camera under test.

[0041] See also Figure 1 The support module 150 includes a first slider 304, a first guide rail, and a support frame 303. The support frame 303 is set perpendicular to the horizontal plane, and the first guide rail is set on the support frame 303. The camera under test is mounted on the first guide rail through the first slider 304. The extension direction of the first guide rail is perpendicular to the first optical axis 307.

[0042] Specifically, the support frame 303 is erected perpendicular to the horizontal direction. A first guide rail is set on the support frame 303, and the extension direction of the first guide rail is perpendicular to the horizontal direction. The camera under test is mounted on the first guide rail via a first slider 304. The first optical axis 307 of the camera under test is perpendicular to the first guide rail. Therefore, when the camera under test moves on the support frame 303, the movement is vertical relative to the display module 140. That is, even when the height of the camera under test is adjusted, the first optical axis 307 remains perpendicular to the display plane 141. Therefore, when the movement of the projection module 120 causes the center of view to shift, the camera under test can be moved vertically by moving the first slider 304, so that the intersection of the first optical axis 307 and the display plane 141 coincides with the center of view.

[0043] Optionally, the support module 150 also includes a second guide rail, a second slider 305, and a support platform 306; the extension direction of the second guide rail is parallel to the first optical axis 307, and the support frame 303 is mounted on the second guide rail via the second slider 305.

[0044] Specifically, the support platform 306 is laid horizontally, and the extension direction of the second guide rail is perpendicular to the display plane 141. The support frame 303 is mounted on the support platform 306 via the second slider 305. Therefore, the support frame 303 can move horizontally relative to the display module 140 on the support platform 306, thereby adjusting the detection distance between the camera under test and the display module 140. Thus, when the projection module 120 is moved to change the viewing size, the detection distance can be determined and adjusted according to the parameters of the camera under test and the repeater lens. Furthermore, the vertical position of the camera under test can be adjusted so that the intersection of the first optical axis 307 and the display plane 141 coincides with the center of the viewing area, thereby further ensuring the integrity of the area information observed by the camera under test.

[0045] Optionally, the view zoom device also includes a mounting bracket 302, on which the display module 140 is mounted. The mounting bracket 302 is used to keep the display plane 141 perpendicular to the horizontal plane.

[0046] Specifically, the fixed bracket 302 adopts a triangular support, with one side extending perpendicular to the horizontal direction. This changes the contact setting between the display module 140 and the side, making the display plane 141 of the display module 140 parallel to that side. Therefore, the display plane 141 is perpendicular to the horizontal plane, avoiding image display distortion.

[0047] Combination Figure 1 , Figure 3 This is a flowchart illustrating a view scaling method provided in an embodiment of the present invention, executed by any view scaling device in this embodiment, which can be implemented in hardware and / or software. The method specifically includes the following steps:

[0048] S1. Align the first optical axis of the camera under test with the display module;

[0049] The first optical axis 307 is the axis of symmetry of the field of view of the camera under test, that is, the center line of the field of view light column. The camera under test is mounted on the support module 150, and the first optical axis 307 of the camera under test is perpendicular to the display plane 141 of the display module 140.

[0050] S2. A lens module is set in front of the lens of the camera under test. The projection module moves along a straight line on the straight line module. When the projection module moves closer to the display module, the size of the scene projected on the display plane decreases. When the projection module moves away from the display module, the size of the scene projected on the display plane increases.

[0051] Specifically, a lens module 130 is installed in front of the lens of the camera under test. The lens module 130 is used to increase the field of view of the camera under test. Therefore, compared with the case without the lens module 130, when testing the same field of view size, the addition of the lens module 130 can shorten the detection distance between the camera under test and the display plane 141.

[0052] The projection module 120 can project test video onto the display plane 141. For example, the projection module 120 can be a projector or similar device. The projection module 120 is mounted on the linear module 110, which provides a linear running track. The projection module 120 can move linearly along this track. The second optical axis 121 of the projection module 120 intersects the display plane 141. The second optical axis 121 and the first optical axis 307 are on the same plane. Since the first optical axis 307 is perpendicular to the display plane 141, the plane containing the first optical axis 307 and the second optical axis 121 is perpendicular to the display plane 141. Therefore, the intersection of the plane containing the second optical axis 121 and the first optical axis 307 with the display plane 141 can bisect the display image. When adjusted to an appropriate viewing size, the first optical axis 307 on this plane can thus ensure that the area information captured by the camera under test in the width direction is complete.

[0053] S3. After adjusting the viewing size on the display module, the support module 150 adjusts the intersection of the first optical axis and the display module to coincide with the center of the viewing area.

[0054] For example, the projection module 120 can extend horizontally along a straight line, meaning its second optical axis 121 is perpendicular to the display plane 141. Since the image projected by the projection module 120 has a certain emission angle, the view size presented on the display plane 141 decreases when the projection module 120 moves closer to the display plane 141, and increases when the projection module 120 moves away from the display plane 141. By determining the parameters of the camera under test, the required view size can be determined, and the camera can be adjusted to an appropriate view size. The height of the camera under test or the height of the support module 150 can be adjusted so that the intersection of the first optical axis 307 and the display plane 141 is located at the center of the view. Furthermore, by adjusting the detection distance between the camera under test and the display plane 141, the integrity of the area information observed by the camera under test can be ensured.

[0055] For example, the projection module 120 can also have a certain angle with the display plane 141 along its straight-line extension direction; that is, the second optical axis 121 of the projection module 120 has an angle with the display plane 141. Similarly, as... Figure 1As shown, since the image projected by the projection module 120 has a certain emission angle, when the projection module 120 moves closer to the display plane 141, the size of the view presented on the display plane 141 decreases; when the projection module 120 moves away from the display plane 141, the size of the view presented on the display plane 141 increases. Once the parameters of the camera under test are determined, the required view size can be obtained. Adjusting to an appropriate view size involves adjusting the height of the camera under test or the height of the support module 150, ensuring that the intersection of the first optical axis 307 and the display plane 141 is located at the center of the view. Furthermore, by adjusting the detection distance between the camera under test and the display plane, the completeness of the area information observed by the camera under test is ensured.

[0056] This invention also provides a testing device for an advanced driver assistance system (ADAS), including any view scaling device as described in this invention. Specifically, the testing device for the ADAS is an ADAS simulation testing device, which typically includes a video dark box. The video dark box is used to adjust the view size and detection distance according to the parameters of the camera under test. The video dark box can be well applied in camera hardware testing. Because it includes any view scaling device as described in this invention, it has the same beneficial effects, which will not be elaborated here.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A view zooming device, characterized in that, include: Linear module, projection module, lens module, display module, and support module; One surface of the display module is a display plane; The support module is disposed on one side of the display plane, and the support module is used to support the camera under test, so that the first optical axis of the camera under test is perpendicular to the display plane. The lens module is disposed in front of the lens of the camera under test, and the lens module is used to shorten the detection distance between the camera under test and the display plane; The projection module is mounted on the linear module and moves along a straight line on the linear module. The projection module has an angle with the display plane along the extension direction of the linear movement. The projection module is used to adjust the viewing size projected onto the display plane. The second optical axis of the projection module is coplanar with the first optical axis. When the projection module moves closer to the display module, the viewing size projected onto the display plane decreases; when the projection module moves away from the display module, the viewing size projected onto the display plane increases. The support module is also used to adjust the intersection of the first optical axis and the display plane to coincide with the center of the view projected on the display plane after adjusting the view size on the display module.

2. The view zoom device according to claim 1, characterized in that, The second optical axis of the projection module has an angle with the display plane, and the angle is between 0 and 90°.

3. The view zoom device according to claim 1, characterized in that, The lens module is a relay lens.

4. The view zoom device according to claim 1, characterized in that, The size of the display plane is larger than the viewing area.

5. The view zoom device according to claim 1, characterized in that, The support module includes a first slider, a first guide rail, and a support frame; the support frame is arranged perpendicular to the horizontal plane, the first guide rail is arranged on the support frame, and the camera under test is mounted on the first guide rail via the first slider; wherein, the extension direction of the first guide rail is perpendicular to the first optical axis.

6. The view zoom device according to claim 5, characterized in that, The support module further includes a second guide rail, a second slider, and a support platform; the extension direction of the second guide rail is parallel to the first optical axis, and the support frame is mounted on the second guide rail via the second slider.

7. The view zoom device according to claim 1, characterized in that, It also includes a fixing bracket, on which the display module is mounted, and the fixing bracket is used to keep the display plane perpendicular to the horizontal plane.

8. A method for zooming in and out of a view, characterized in that, Performed by the view zoom device according to any one of claims 1-7, the method includes: S1. Align the first optical axis of the camera under test with the display module; S2. The lens module is placed in front of the lens of the camera under test; S3. The projection module moves along a straight line on the straight line module. When the projection module moves closer to the display module, the size of the view projected on the display plane decreases. When the projection module moves away from the display module, the size of the view projected on the display plane increases. S4. After adjusting the viewing size on the display module, the support module adjusts the intersection of the first optical axis and the display plane to coincide with the center of the viewing image projected on the display plane.

9. A testing device for an advanced driver assistance system, characterized in that, Includes the view zoom device as described in any one of claims 1-7.

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