Vehicle side view camera installation calibration device

Abstract

The utility model provides a vehicle side view camera installation calibration device which is used for calibrating vertical shafts of side view cameras installed on the two sides of a cab and comprises a support and a gradienter. Wherein the support is used for being detachably connected to an outer door plate of a cab and located within the visual angle range of the side-view camera, a calibration reference line is arranged on the support, a yaw center shaft is arranged at the upper end of the support, the yaw center shaft is used for being aligned with the center of a lens of the side-view camera in the vertical direction, and the yaw center shaft is located on the extension line of the calibration reference line; the gradienter is arranged at the lower end of the support. The horizontal detection surface of the gradienter is perpendicular to the calibration reference line. The vehicle side view camera installation calibration device provided by the utility model has low requirements on the vehicle parking position and the surrounding space, can improve the convenience of the calibration operation, can simplify the calibration operation process, and can improve the calibration efficiency.

Description

Technical Field

[0001] The utility model belongs to the technical field of on-vehicle camera calibration, and particularly relates to an installation and calibration device for a vehicle side-view camera. Background Art

[0002] Due to large visual blind areas, commercial vehicles usually install side-view cameras for observing side blind areas in the later stage. The side-view cameras are generally installed on the outer rearview mirror brackets outside the cab. When installing, the yaw angle of the camera needs to be adjusted to ensure that the center line of its field of view is vertical.

[0003] Currently, for the installation and calibration of side-view cameras, most use a plumb bob to hang down from the lens center of the camera to the ground. Then, a calibration straight line is drawn on the ground according to the position of the plumb bob. Then, a central axis is drawn at the center of the picture transmitted by the camera to the in-vehicle display screen. An operator outside the vehicle adjusts the yaw angle of the side-view camera so that the calibration straight line in the field of view coincides with the central axis of the screen picture, thereby completing the calibration. On the one hand, since the side-view camera is at a relatively high height from the ground, the central axis drawn on the ground needs to be relatively long, requiring a very wide and flat ground condition, which restricts the convenience of installing and calibrating the side-view camera. On the other hand, since the position of the ground marking needs to be determined by a plumb bob, the calibration operation process is cumbersome and the efficiency is low. Summary of the Utility Model

[0004] An embodiment of the utility model provides an installation and calibration device for a vehicle side-view camera, aiming to reduce the calibration difficulty of the side-view camera and improve the calibration efficiency.

[0005] To achieve the above object, the technical solution adopted by the utility model is: providing an installation and calibration device for a vehicle side-view camera, which is used to calibrate the vertical axis of the side-view cameras installed on both sides of the cab, and includes a bracket and a level; wherein, the bracket is used for detachably connecting to the outer door panel of the cab and is within the viewing range of the side-view camera. There is a calibration reference line on the bracket, and the upper end of the bracket has a yaw central axis, which is used to align with the lens center of the side-view camera in the vertical direction, and the yaw central axis is located on the extension line of the calibration reference line; the level is arranged at the lower end of the bracket, and the horizontal detection surface of the level is perpendicular to the calibration reference line.

[0006] In a possible implementation manner, the bracket includes a long strip board, a first magnetic attraction member and a second magnetic attraction member; wherein, at least part of the boundary on one side of the long strip board forms the calibration reference line; the first magnetic attraction member is used for adsorbing and fixing to the outer door panel, and there is a yaw central axis on the first magnetic attraction member, and the yaw central axis passes through the long strip board and is screwed with a first fastening member; the second magnetic attraction member is arranged on the long strip board and is spaced from the first magnetic attraction member along the length direction of the long strip board, and the second magnetic attraction member is used for adsorbing and fixing to the outer door panel.

[0007] In some embodiments, one end of the long strip plate extends obliquely towards one side thereof to form a connecting portion, and a shaft hole adapted for the transverse swing central axis to pass through is provided on the connecting portion.

[0008] Exemplarily, the first magnetic attraction member includes a first magnetic attraction body and a transverse swing central axis. One end of the transverse swing central axis is fixedly connected to the first magnetic attraction body by screwing, and the other end of the transverse swing central axis passes through the shaft hole and is screwed with a first fastening member.

[0009] Illustratively, the second magnetic attraction member is slidably arranged on the long strip plate along the length direction of the long strip plate.

[0010] In a possible implementation manner, a strip-shaped hole extending along the length direction of the long strip plate is provided on the long strip plate, and a sliding rod is provided on the second magnetic attraction member. One end of the sliding rod passes through the strip-shaped hole and is screwed with a second fastening member.

[0011] In some embodiments, the second magnetic attraction member includes a second magnetic attraction body and a sliding rod. One end of the sliding rod is fixedly connected to the second magnetic attraction body by screwing, and the other end of the sliding rod passes through the strip-shaped hole and is screwed with a second fastening member.

[0012] Exemplarily, a corrugated boundary is formed on the side of the long strip plate opposite to the calibration reference line.

[0013] Illustratively, a hem is provided at the end of the long strip plate far from the first magnetic attraction member. The hem is perpendicular to the plate surface of the long strip plate, and a spirit level is arranged on the hem.

[0014] Exemplarily, the spirit level is a digital display electronic spirit level.

[0015] The beneficial effect of the vehicle side view camera installation and calibration device provided by the present utility model lies in that: compared with the prior art, when installing the bracket on the outer door panel of the cab in the vehicle side view camera installation and calibration device of the present utility model, only the transverse swing central axis on the bracket needs to be aligned with the lens center of the side view camera in the vertical direction, and then the lower end of the bracket is swung by using the spirit level as a guide. When the horizontal detection surface of the spirit level is in a horizontal state, fixing the bracket can ensure that the calibration reference line on the bracket is in a vertical state, and then adjusting the yaw angle of the side view camera to make the picture center line of the side view camera coincide with the calibration reference line appearing in the picture; the entire calibration process uses the outer door panel of the cab as the installation foundation of the bracket, occupying a small space and without the need to rely on the ground, and can complete the calibration in any site environmental conditions, thereby improving the convenience of the calibration operation. At the same time, the bracket is installed on the outer door panel close to the side view camera, so the transverse swing central axis and the lens center can be vertically aligned directly by human eye observation, thus simplifying the calibration operation process and improving the calibration efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view structural schematic diagram of the vehicle side view camera installation and calibration device provided by the embodiment of the present utility model;

[0017] Figure 2 A schematic side view structure diagram of the bracket adopted in the embodiment of the present utility model;

[0018] Figure 3 A three-dimensional structure diagram of the long strip board adopted in the embodiment of the present utility model.

[0019] In the figure: 10, bracket; 101, calibration reference line; 11, long strip board; 111, connecting part; 1111, shaft hole; 112, strip hole; 113, corrugated boundary; 114, folded edge; 12, first magnetic attraction member; 121, first magnetic attraction body; 122, horizontal swing central axis; 123, first fastener; 13, second magnetic attraction member; 131, second magnetic attraction body; 132, sliding rod; 133, second fastener; 20, level gauge; 30, side view camera. Specific embodiments

[0020] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model more clear and understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0021] It should be noted that when an element is referred to as being "disposed on" another element, it can be directly on the other element or indirectly on the other element. It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application 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 to the present application. The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or several of such features. In the description of the present application, the meaning of "a plurality" and "several" is two or more, unless otherwise specifically defined.

[0022] Please refer to Figures 1 to 3, a description is now given of the vehicle side view camera installation and calibration device provided by the present utility model. The vehicle side view camera installation and calibration device is used to calibrate the vertical axis of the side view cameras 30 installed on both sides of the cab, and includes a bracket 10 and a level 20; wherein, the bracket 10 is used for detachably connecting to the outer door panel of the cab and is located within the viewing angle range of the side view camera 30. A calibration reference line 101 is provided on the bracket 10. The upper end of the bracket 10 has a yaw central axis 122, and the yaw central axis 122 is used to align with the lens center of the side view camera 30 in the vertical direction, and the yaw central axis 122 is located on the extension line of the calibration reference line 101; the level 20 is provided at the lower end of the bracket 10, and the horizontal detection surface of the level 20 is perpendicular to the calibration reference line 101.

[0023] It should be noted that in this embodiment, the bracket 10 can be a rod-shaped member or a slat structure, and is connected to the outer door panel by means of magnetic attraction or double-sided adhesive bonding; the level 20 can be a conventional bubble type or an electronic type. Here, the horizontal detection surface of the level 20 refers to the plane used to detect whether it is in a horizontal state, that is, the measured plane, and can also be understood as the installation surface of the level 20 or a plane parallel to its installation surface.

[0024] The usage method of the vehicle side view camera installation and calibration device provided in this embodiment: First, the operator visually aligns the yaw central axis 122 with the lens center of the side view camera 30 in the vertical direction, and then connects the top end of the bracket 10 to the outer door panel. At this time, the bracket 10 can still swing with the yaw central axis 122 as the rotation axis. During the swinging process of the bracket 10, observe the state of the level 20 at any time. When the level 20 swinging with the bracket 10 reaches the horizontal state, stop swinging, and stably connect the lower end of the bracket 10 to the outer door panel. At this time, it can be ensured that the calibration reference line 101 on the bracket 10 is in the vertical state, and the calibration reference line 101 and the lens center of the side view camera 30 are aligned in the vertical direction; then make a central axis marking line on the in-vehicle display screen. The calibration reference line 101 appears in the picture transmitted by the side view camera 30 to the display screen, and then start to adjust the yaw angle of the side view camera 30 to make the calibration reference line 101 in the picture coincide with the central axis marking line on the screen. Finally, fix the side view camera 30 reliably according to the current yaw angle.

[0025] Compared with the prior art, when the vehicle side-view camera installation and calibration device provided in this embodiment installs the bracket 10 on the outer door panel of the cab, only the yaw center axis 122 on the bracket 10 needs to be aligned with the lens center of the side-view camera 30 in the vertical direction, and then the lower end of the bracket 10 is swung using the spirit level 20 as a guide. When the horizontal detection surface of the spirit level 20 is in a horizontal state, fixing the bracket 10 can ensure that the calibration reference line 101 on the bracket 10 is in a vertical state. Then, the yaw angle of the side-view camera 30 is adjusted so that the center line of the side-view camera 30's screen coincides with the calibration reference line 101 appearing in the screen. The entire calibration process uses the outer door panel of the cab as the installation basis for the bracket 10, occupying a small space and not requiring the ground. It can complete calibration under any site environmental conditions, thereby improving the convenience of the calibration operation. At the same time, the bracket 10 is installed on the outer door panel close to the side-view camera 30, so the yaw center axis 122 can be directly vertically aligned with the lens center by human eye observation, which can simplify the calibration operation process and improve the calibration efficiency.

[0026] In some embodiments, referring to Figure 2 , the bracket 10 includes a long strip plate 11, a first magnetic attraction member 12, and a second magnetic attraction member 13. Among them, at least part of the boundary on one side of the long strip plate 11 forms the calibration reference line 101. The first magnetic attraction member 12 is used for adsorbing and fixing to the outer door panel. The first magnetic attraction member 12 is provided with a yaw center axis 122, and the yaw center axis 122 passes through the long strip plate 11 and is screwed with a first fastening member 123. The second magnetic attraction member 13 is arranged on the long strip plate 11 and is spaced from the first magnetic attraction member 12 along the length direction of the long strip plate 11. The second magnetic attraction member 13 is used for adsorbing and fixing to the outer door panel.

[0027] The long strip plate 11 is adsorbed and connected to the outer door panel by the first magnetic attraction member 12 and the second magnetic attraction member 13 connected to its two ends, which is not only convenient for disassembly and assembly but also convenient for flexible adjustment of the installation position of the bracket 10. Using the side edge of the long strip plate 11 as the calibration reference line 101 is not only simpler in structure but also has higher clarity of the boundary displayed in the screen of the side-view camera 30 compared with other methods such as scribing and grooving on the long strip plate 11, which can improve the accuracy and convenience of aligning and judging the calibration reference line 101 with the central axis marking line in the screen.

[0028] In some possible implementation manners, please refer to Figure 2 and Figure 3, one end of the long strip 11 extends obliquely towards one side thereof to form a connecting portion 111, and a shaft hole 1111 adapted for the transverse swing central axis 122 to pass through is provided on the connecting portion 111. The long strip 11 forms an inverted L-shaped structure based on the inclined connecting portion 111, so as to ensure that the transverse swing central axis 122 obtains a layout space capable of being collinear with the calibration reference line 101. The transverse swing central axis 122 passes through the shaft hole 1111 on the connecting portion 111 and forms a rotational fit with the shaft hole 1111. The long strip 11 can be easily swung when the first fastener 123 is loosened, and after the long strip 11 swings in place (i.e., the calibration reference line 101 reaches the vertical state), tightening the first fastener 123 can ensure the stable state of the long strip 11. The structure is simple and convenient for the swing adjustment of the long strip 11.

[0029] Specifically, as Figure 2 shown, in this embodiment, the optional structure of the first magnetic attraction member 12 is that the first magnetic attraction member 12 includes a first magnetic attraction body 121 and a transverse swing central axis 122. One end of the transverse swing central axis 122 is fixedly screwed to the first magnetic attraction body 121, and the other end of the transverse swing central axis 122 passes through the shaft hole 1111 and is screwed with a first fastener 123.

[0030] After the first magnetic attraction body 121 is adsorbed and fixed to the outer door panel, during the swinging process of the long strip 11, relative rotation occurs between the shaft hole 1111 and the transverse swing central axis 122, and the first magnetic attraction body 121 does not move, which can improve the adsorption reliability between the first magnetic attraction body 121 and the outer door panel, and at the same time avoid scratching the paint surface of the outer door panel due to the sliding of the first magnetic attraction body 121 on the outer door panel; when the first magnetic attraction body 121 or the transverse swing central axis 122 is damaged, the two can be disassembled and replaced separately, thereby reducing the maintenance cost.

[0031] In some embodiments, please refer to Figure 1 and Figure 2 , the above-mentioned second magnetic attraction member 13 is slidably arranged on the long strip 11 along the length direction of the long strip 11. Since the outer door panel of the cab is usually not a complete plane, but there are some uneven rib structures, the second magnetic attraction member 13 can be slid here to avoid these non-planar positions, so as to ensure the adsorption reliability between the second magnetic attraction member 13 and the outer door panel, and further improve the connection stability of the bracket 10.

[0032] Optionally, in this embodiment, please refer to Figure 2 and Figure 3 , a strip-shaped hole 112 extending along the length direction of the long strip 11 is provided on the above-mentioned long strip 11, and a sliding rod 132 is provided on the second magnetic attraction member 13. One end of the sliding rod 132 passes through the strip-shaped hole 112 and is screwed with a second fastener 133.

[0033] Loosening the second fastener 133 can enable the sliding rod 132 to slide within the elongated hole 112, thereby adjusting the distance between the second magnetic member 13 and the first magnetic member 12. After the adjustment is in place, simply tighten the second fastener 133 again. The operation is simple and convenient.

[0034] It should be noted that the above first fastener 123 and second fastener 133 can both be conventional nuts, or can also be wing nuts, cap hand-turn nuts, etc. suitable for manual screwing operations.

[0035] Figure 2 In one structural form having the above second magnetic member 13, the second magnetic member 13 includes a second magnetic body 131 and a sliding rod 132. One end of the sliding rod 132 is screwed and fixed to the second magnetic body 131, and the other end of the sliding rod 132 passes through the elongated hole 112 and is screwed with the second fastener 133. That is to say, the sliding rod 132 and the second magnetic body 131 can be disassembled, thereby facilitating separate replacement of each of them and reducing the maintenance cost.

[0036] It should be noted that in some embodiments, please refer to Figure 1 , a corrugated boundary 113 is formed on the side of the elongated plate 11 opposite to the calibration reference line 101. Since it is easy to misidentify the position of the calibration reference line 101 when both sides of the elongated plate 11 are straight boundaries, the elongated plate 11 is structured with a straight edge on one side and a corrugated edge on the other side. On the one hand, it can clarify the position of the calibration reference line 101 and avoid errors. On the other hand, it can also utilize the contrast between the corrugated boundary 113 and the calibration reference line 101, thereby helping to improve the accuracy of aligning judgment between the calibration reference line 101 and the central axis marking line of the screen, and further improving the calibration accuracy of the side-view camera 30.

[0037] In some embodiments, refer to Figure 3 , a folded edge 114 is provided at the end of the elongated plate 11 away from the first magnetic member 12. The folded edge 114 is perpendicular to the plate surface of the elongated plate 11, and the level 20 is provided on the folded edge 114. By providing the folded edge 114, an installation plane suitable for supporting the level 20 is formed. This installation plane serves as the horizontal detection surface of the level 20. When the level 20 is horizontal, it can be determined that the calibration reference line 101 perpendicular to the folded edge 114 forms a vertical state, which can improve the installation stability of the level 20 and is also beneficial to improving the accuracy of the swing adjustment of the elongated plate 11.

[0038] Exemplarily, the above-mentioned level 20 is a digital display electronic level 20. An electronic level 20 is a measuring instrument with a base measuring surface that measures the minute inclination angle of the measured surface relative to the horizontal plane based on the balance principle of a capacitive pendulum. Among them, an instrument that indicates the measured value with a pointer-type indicating device is called a pointer-type electronic level 20, and an instrument that indicates the measured value with a digital display indicating device is called a digital display electronic level 20. Compared with the pointer-type electronic level 20 that requires observing the pointer angle, using the digital display electronic level 20 here can more intuitively determine the horizontal state of the level 20, reduce the human eye observation error, and thus improve the accuracy of the swing angle adjustment of the long strip board 11.

[0039] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A vehicle side-view camera installation and calibration device for calibrating the vertical axis of side-view cameras installed on both sides of the cab, characterized in that Comprising: A bracket, which is detachably connected to the outer door panel of the cab and is within the viewing angle range of the side-view camera. A calibration reference line is provided on the bracket. The upper end of the bracket has a yaw central axis, which is used to align the lens center of the side-view camera in the vertical direction, and the yaw central axis is located on the extension line of the calibration reference line; A level, which is provided at the lower end of the bracket, and the horizontal detection surface of the level is perpendicular to the calibration reference line.

2. The vehicle side-view camera installation and calibration device according to claim 1, characterized in that, The bracket includes: A long strip plate, at least part of the boundary on one side of the long strip plate forms the calibration reference line; A first magnetic attraction member, which is used for adsorbing and fixing to the outer door panel. The yaw central axis is provided on the first magnetic attraction member, and the yaw central axis passes through the long strip plate and is screwed with a first fastener; A second magnetic attraction member, which is provided on the long strip plate and is spaced from the first magnetic attraction member along the length direction of the long strip plate. The second magnetic attraction member is used for adsorbing and fixing to the outer door panel.

3. The vehicle side view camera installation and calibration device according to claim 2, characterized in that, One end of the long strip plate extends obliquely towards one side to form a connecting portion, and a shaft hole suitable for the yaw central axis to pass through is provided on the connecting portion.

4. The vehicle side view camera installation and calibration device according to claim 3, characterized in that, The first magnetic attraction member includes a first magnetic attraction body and the yaw central axis. One end of the yaw central axis is screwed and fixed to the first magnetic attraction body, and the other end of the yaw central axis passes through the shaft hole and is screwed with the first fastener.

5. The vehicle side-view camera installation and calibration device according to claim 2, characterized in that, The second magnetic attraction member is slidably arranged on the long strip plate along the length direction of the long strip plate.

6. The vehicle side view camera installation and calibration device according to claim 5, characterized in that, A strip-shaped hole extending along the length direction of the long strip plate is provided on the long strip plate, and a sliding rod is provided on the second magnetic attraction member. One end of the sliding rod passes through the strip-shaped hole and is screwed with a second fastener.

7. The vehicle side-view camera installation and calibration device according to claim 6, characterized in that, The second magnetic attraction member includes a second magnetic attraction body and the sliding rod. One end of the sliding rod is screwed and fixed to the second magnetic attraction body, and the other end of the sliding rod passes through the strip-shaped hole and is screwed with the second fastener.

8. The vehicle side-view camera installation and calibration device according to claim 2, wherein The side of the long strip plate opposite to the calibration reference line forms a corrugated boundary.

9. The vehicle side-view camera installation and calibration device according to claim 2, characterized in that, A flanging is provided at the end of the long strip plate far from the first magnetic attraction member, and the flanging is perpendicular to the plate surface of the long strip plate. The level is provided on the flanging.

10. The vehicle side-view camera installation and calibration device according to any one of claims 1-9, characterized in that, The level is a digital display electronic level.

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