Wheel detection device and four-wheel aligner

Abstract

The utility model belongs to the technical field of vehicle detection, and particularly relates to a wheel detection device and a four-wheel aligner, the wheel detection device comprises a mounting seat, an image acquisition module and a control device, the mounting seat is used for being mounted on a first side of a vehicle and is located on the same side with a to-be-detected wheel of the vehicle; the first side is one side of the vehicle which is relatively distributed along the width direction; the image acquisition module is mounted on the mounting seat; the image acquisition module comprises an image acquisition unit, a lens of the image acquisition unit faces the to-be-detected wheel and is obliquely arranged upwards, and the image acquisition unit is used for shooting image information of a first calibration part fixed to the to-be-detected wheel; and the control device is connected with the image acquisition unit to receive the image information of the first calibration part and process the image information of the first calibration part, so that the wheel detection device can meet the detection requirements of different vehicle types, and the universality of the wheel detection device is improved.

Description

Technical Field

[0001] The present application belongs to the field of vehicle detection technology, and in particular relates to a wheel detection device and a four-wheel aligner. Background Art

[0002] The significance of four-wheel alignment detection is to ensure that the relative positions of the car's tires, steering mechanism and front and rear axles are maintained in a correct balanced state, thereby improving driving safety, reducing fuel consumption, extending tire life, and improving driving comfort.

[0003] In order to detect the four-wheel alignment parameters of a vehicle, it is usually necessary to use an intelligent four-wheel aligner to perform four-wheel alignment detection on the vehicle, so as to adjust the four-wheel parameters of the vehicle and ensure that the vehicle has good driving performance and driving stability. In some four-wheel aligners, an image acquisition module is used to capture the calibration parts on the wheels to obtain wheel image information. However, in the actual detection process, the image acquisition module is difficult to meet the detection requirements of different types of vehicles.

[0004] The above statements are only used to provide background information related to the present application and do not necessarily constitute prior art. Utility Model Content

[0005] The purpose of this application is to provide a wheel detection device and a four-wheel aligner, aiming to solve the technical problem that the image acquisition module in the four-wheel aligner in the related art is difficult to meet the detection requirements of different vehicle models.

[0006] To achieve the above-mentioned purpose, the technical solution adopted in this application is: a wheel detection device, including a mounting seat, an image acquisition module and a control device, the mounting seat is used to be installed on a first side of the vehicle and is located on the same side as the wheel to be tested of the vehicle, the first side being one of the sides of the vehicle relatively distributed along the width direction; the image acquisition module is installed on the mounting seat; the image acquisition module includes an image acquisition unit, the lens of the image acquisition unit is facing the wheel to be tested and is tilted upward, and the image acquisition unit is used to capture image information of a first calibration part fixed to the wheel to be tested; the control device is connected to the image acquisition unit to receive the image information of the first calibration part and process the image information of the first calibration part.

[0007] Optionally, the angle between the optical axis of the lens of the image acquisition unit and the horizontal plane is in the range of 12.5° to 18.5°; and / or the angle between the optical axis of the lens of the image acquisition unit and the auxiliary plane is in the range of 14° to 20°, and the auxiliary plane is perpendicular to the width direction of the vehicle.

[0008] Optionally, the image acquisition unit includes a camera and a fill light, and the fill light is used to provide fill light for the camera.

[0009] Optionally, the fill light includes a substrate and a plurality of light-emitting components mounted on the substrate, the substrate is provided with a through hole, the camera lens is passed through the through hole, and the plurality of light-emitting components are distributed along the circumference of the camera lens.

[0010] Optionally, the image acquisition unit further includes a first bracket and a second bracket installed on the mounting base and spaced apart, the camera is installed on the first bracket, and the fill light is installed on the second bracket.

[0011] Optionally, the mounting seat has a magnetic surface, which can be magnetically fixed to a supporting mechanism for supporting the vehicle.

[0012] Optionally, the height difference between the lens of the image acquisition unit and the magnetic surface ranges from 100 mm to 160 mm; and / or, along the width direction of the vehicle, the distance between the lens of the image acquisition unit and the magnetic surface ranges from 160 mm to 220 mm.

[0013] Optionally, there are two image acquisition units, and the two image acquisition units respectively capture image information of the first calibration parts of two wheels to be tested located on the first side of the vehicle.

[0014] Optionally, the wheel detection device also includes a position detection module, which includes a second calibration member and a first image acquisition member. The second calibration member is used for photographing by the second image acquisition member of the wheel detection device located on the second side of the vehicle to obtain image information of the second calibration member; the first image acquisition member is used for photographing the third calibration member of the wheel detection device located on the second side of the vehicle to obtain image information of the third calibration member. The control device is connected to the first image acquisition member to receive the image information of the third calibration member and process the image information of the third calibration member; the first side and the second side are respectively opposite sides of the vehicle along the width direction.

[0015] Another technical solution adopted in the present application is: a four-wheel aligner, comprising the wheel detection device as described above.

[0016] The above one or more technical solutions in the wheel detection device and four-wheel aligner provided by the present application have at least one of the following technical effects: when in use, the mounting seat is arranged on the first side of the vehicle, the image acquisition unit captures the image information of the first calibration piece installed on the wheel to be tested, and the image acquisition unit feeds back the image information of the first calibration piece to the control device. After receiving the image information of the first calibration piece, the control device processes the image information of the first calibration piece to facilitate subsequent four-wheel alignment detection of the vehicle according to the image information of the first calibration piece; and the lens of the image acquisition unit in the embodiment of the present application is set toward the vehicle, so that the wheels to be tested of vehicles of different widths can fall within the field of view of the image acquisition unit, and the image acquisition unit can meet the four-wheel alignment detection requirements of vehicles of different widths; and the lens of the image acquisition unit is tilted upward, so that the wheels to be tested of vehicles of different heights can fall within the field of view of the image acquisition unit, and the image acquisition unit can meet the four-wheel alignment detection requirements of vehicles of different heights; in this way, the wheel detection device can meet the detection requirements of different models and improve the versatility of the wheel detection device.

[0017] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0019] Figure 1 A schematic diagram of the structure of the four-wheel aligner provided in some embodiments of the present application when detecting a vehicle.

[0020] Figure 2 for Figure 1 The structural schematic diagram of the wheel detection device is shown in FIG.

[0021] Figure 3 for Figure 2 An exploded schematic diagram of the wheel detection device shown in FIG.

[0022] Figure 4 for Figure 2 The structure of the wheel detection device shown in the figure is shown after the housing is hidden. Figure 1 .

[0023] Figure 5 for Figure 4 Schematic diagram of the structure of the image acquisition unit shown in .

[0024] Figure 6 for Figure 5 The exploded schematic diagram of the image acquisition unit is shown.

[0025] Figure 7 for Figure 2 The structure of the wheel detection device shown in the figure is shown after the housing is hidden. Figure 2 .

[0026] Figure 8 for Figure 2 The structure of the wheel detection device shown in the figure is shown after the housing is hidden. Figure 3 .

[0027] Figure 9 for Figure 8 Schematic diagram of the structure of the second calibration piece and the third bracket shown in .

[0028] Figure 10 for Figure 9 Schematic diagram of the exploded view of the second calibration member and the third bracket shown.

[0029] Among them, the reference numerals in the figures are:

[0030] 1000, four-wheel aligner; 100, wheel detection device; 101, first wheel detection device; 102, second wheel detection device; 110, mounting base; 111, base; 111a, magnetic surface; 1111, magnetic member; 1112, indicator unit; 112, support assembly; 1121, support frame; 1122, mounting plate; 11221, mounting surface; 120, image acquisition module; 121, image acquisition unit; 1211, camera; 12111, lens; 1212, fill light; 12121, base plate; 1212a, through-hole; 12122, light-emitting member; 1213, first bracket; 1214, Second bracket; 130, control device; 140, position detection module; 141, second calibration part; 1411, light board; 1412, diffuser plate; 1413, target plate; 142, first image acquisition part; 143, third bracket; 144, fourth bracket; 150, outer shell; 151, shell; 1511, first shell; 1512, second shell; 1513, third shell; 1514, first window; 1515, second window; 1516, handle; 152, light-transmitting part; 200, first calibration part; 300, wheel hub clamping device; 2000, vehicle; 2100, wheel to be measured; 3000, supporting mechanism. DETAILED DESCRIPTION

[0031] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is 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 this application and are not intended to limit this application.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0033] In the description of the embodiments of this application, the technical terms "first," "second," etc., are used solely to distinguish between different objects and should not be understood to indicate or imply relative importance, or to implicitly specify the quantity, specific order, or primary-secondary relationship of the technical features indicated. Therefore, a feature designated "first" or "second" may explicitly or implicitly include one or more of such features.

[0034] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of such phrases in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive with other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments in any suitable manner.

[0035] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0036] In the description of the embodiments of this application, the term "plurality" refers to two or more (including two). Similarly, "multiple groups" refers to two or more (including two groups), and "multiple sheets" refers to two or more (including two sheets). "Several" means one or more, unless otherwise specifically defined.

[0037] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limiting the embodiments of the present application.

[0038] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0039] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, when an element is referred to as being “fixed to” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0040] An embodiment of the present application provides a wheel detection device, which can be used to detect the four-wheel alignment information of a vehicle, such as: kingpin caster angle, kingpin inclination angle, front wheel camber angle and front wheel toe angle; the wheel detection device can be used in a four-wheel aligner, and can also be used in other equipment for detecting wheels.

[0041] The following description takes a four-wheel alignment instrument as an example.

[0042] In some embodiments, see Figure 1As shown, the four-wheel aligner 1000 includes four first calibration pieces 200 and two wheel detection devices 100. The two wheel detection devices 100 are respectively installed on the left and right sides of the vehicle 2000. The four first calibration pieces 200 are respectively installed on the four wheels of the vehicle 2000. The wheel detection device 100 located on the left side of the vehicle 2000 shoots the first calibration pieces 200 on the left front wheel and the left rear wheel of the vehicle 2000 to obtain image information of the first calibration pieces 200 installed on the left front wheel and the left rear wheel of the vehicle 2000; The wheel detection device 100 on the right side of the vehicle 2000 captures image information of the first calibration part 200 on the right front wheel and the right rear wheel of the vehicle 2000. The two wheel detection devices 100 can capture images of each other to obtain image information; the four-wheel aligner 1000 obtains the position information between the two wheel detection devices 100 and the positions of the four wheels relative to the two wheel detection devices 100 based on the obtained image information, and obtains the four-wheel alignment information of the vehicle 2000 based on these position information and the obtained image information.

[0043] In some embodiments, the first calibration member 200 can be installed on the hub of the wheel 2100 to be tested through the hub clamping device 300. The fixed stability and reliability of the first calibration member 200 are conducive to improving the detection accuracy of the four-wheel aligner 1000.

[0044] In some embodiments, the first calibration element 200 may be a target, such as a self-luminous target, a three-dimensional target, etc.

[0045] In some embodiments, the four-wheel aligner 1000 is used in conjunction with a supporting mechanism 3000 (e.g., a lift, etc.). The vehicle 2000 rests on the supporting mechanism 3000, and the supporting mechanism 3000 elevates the vehicle 2000 to facilitate positioning detection of the four-wheel aligner 1000. The wheel detection device 100 is installed on the supporting mechanism 3000 to facilitate installation and fixation of the wheel detection device 100.

[0046] For the convenience of explanation below, the length direction of the vehicle 2000 can be found in the attached Figure 1 The X-axis in the vehicle 2000 and the width direction can be found in the attached diagram. Figure 1 The Y-axis in the figure and the height direction of the vehicle 2000 can be found in the attached Figure 2 The Z axis in .

[0047] Combine Figures 2-4As shown, in some embodiments, the wheel detection device 100 includes a mounting seat 110, an image acquisition module 120 and a control device 130; the mounting seat 110 is used to be installed on a first side of the vehicle 2000 and is located on the same side as the wheel 2100 to be tested of the vehicle 2000, and the first side is one of the sides of the vehicle 2000 that are relatively distributed along the width direction; the image acquisition module 120 is installed on the mounting seat 110; the image acquisition module 120 includes an image acquisition unit 121, and the lens 12111 of the image acquisition unit 121 is facing the wheel 2100 to be tested and is tilted upward, and the image acquisition unit 121 is used to capture image information of the first calibration piece 200 fixed to the wheel 2100 to be tested; the control device 130 is connected to the image acquisition unit 121 to receive the image information of the first calibration piece 200 and process the image information of the first calibration piece 200.

[0048] The mounting base 110 may refer to a component for supporting the image acquisition module 120 . The mounting base 110 may be fixed on a lift to fix the wheel detection device 100 , so that the image acquisition module 120 can stably acquire image information of the first calibration component 200 .

[0049] The first side of the vehicle 2000 may refer to the left side or the right side of the vehicle 2000 . During the four-wheel alignment test, the mounting seats 110 of the two wheel detection devices 100 are located on the left side and the right side of the vehicle 2000 , respectively.

[0050] The image acquisition module 120 includes an image acquisition unit 121. The image acquisition unit 121 may be used to capture image information of the first calibration piece 200 mounted on the wheel to be tested 2100. The image acquisition unit 121 may be, but is not limited to, a camera 1211, a camera, or other components. The image acquisition module 120 may include one image acquisition unit 121. One image acquisition unit 121 may acquire image information of the first calibration piece 200 on the two wheels to be tested 2100 located on the first side. The image acquisition module 120 may also include two image acquisition units 1 21. The two image acquisition units 121 respectively acquire image information of the first calibration piece 200 located on the two front wheels and the rear wheel on the first side, so as to improve the detection efficiency of the wheel detection device 100. In addition, the arrangement of the two image acquisition units 121 enables the wheel detection device 100 to be arranged in the middle position of the two wheels on the same side of the vehicle 2000. Compared with the method in which the wheel detection device 100 is arranged on the front side or the rear side of the vehicle 2000, the space required for the four-wheel aligner 1000 to detect can be reduced, and the detection of the four-wheel aligner 1000 is more convenient and quick.

[0051] The first calibration object 200 is a component capable of being captured by the image acquisition unit 121 to obtain image information. The first calibration object includes specific patterns or feature points, such as a checkerboard or dot pattern, that can be captured and used for calculation by the image acquisition unit 121. For example, during the detection process, the image acquisition unit 121 captures the image information of the first calibration object 200, then extracts feature information from the image information and uses this feature information to calculate the four-wheel alignment information of the vehicle 2000.

[0052] The control device 130 may refer to a component capable of transmitting data with the image acquisition unit 121; the control device 130 and the image acquisition unit 121 may be connected via a wire harness or wirelessly; the control device 130 may receive image information of the first calibration member 200 fed back by the image acquisition unit 121 and process the image information of the first calibration member 200; "processing" may refer to transmitting the image information of the first calibration member 200 to an external device, analyzing the image information of the first calibration member 200 using the external device, thereby obtaining four-wheel alignment information of the vehicle 2000; "processing" may also refer to parsing the image information of the first calibration member 200, thereby obtaining four-wheel alignment information of the vehicle 2000. The control device 130 may be, but is not limited to, a control module (e.g., a motherboard, etc.), and may also be a tablet, a mobile phone, or other computer device.

[0053] The lens 12111 of the image acquisition unit 121 may refer to an optical component composed of multiple optical lenses in the image acquisition unit 121, and the optical axis of the lens 12111 may refer to the axis of the optical lens. Figure 4 The lens 12111 of the image acquisition unit 121 is arranged toward the vehicle 2000 and tilted upward, so that when the wheel detection device 100 is in the detection state, the distance between the center of the optical lens closest to the object image side and the vehicle 2000 is smaller than the distance between the center of the optical lens away from the object image side and the vehicle 2000, and the center of the optical lens closest to the object image side is higher than the center of the optical lens away from the object image.

[0054] The wheel detection device 100 of the embodiment of the present application, when in use, the mounting seat 110 is arranged on the first side of the vehicle 2000, the image acquisition unit 121 captures the image information of the first calibration piece 200 mounted on the wheel to be tested 2100, and the image acquisition unit 121 feeds the image information of the first calibration piece 200 back to the control device 130. After receiving the image information of the first calibration piece 200, the control device 130 processes the image information of the first calibration piece 200 to facilitate subsequent detection based on the image information of the first calibration piece 200 to obtain the four-wheel alignment information of the vehicle 2000; and the lens 12111 of the image acquisition unit 121 of the embodiment of the present application is directed toward the vehicle 200 0 setting, so that the wheels 2100 to be tested of vehicles 2000 of different widths can fall within the field of view of the image acquisition unit 121, and the image acquisition unit 121 can meet the four-wheel alignment detection requirements of vehicles 2000 of different widths; and the lens 12111 of the image acquisition unit 121 is tilted upward, so that the wheels 2100 to be tested of vehicles 2000 of different heights can fall within the field of view of the image acquisition unit 121, and the image acquisition unit 121 can meet the four-wheel alignment detection requirements of vehicles 2000 of different heights; in this way, the wheel detection device 100 can meet the detection requirements of different vehicle models, thereby improving the versatility of the wheel detection device 100.

[0055] In some embodiments, see Figure 4 As shown, the angle between the optical axis of the lens 12111 of the image acquisition unit 121 and the horizontal plane ranges from 12.5° to 18.5°.

[0056] The angle between the optical axis of the lens 12111 of the image acquisition unit 121 and the horizontal plane is α. When the wheel detection device 100 is in the detection state, α may refer to the angle between the optical axis of the lens 12111 of the image acquisition unit 121 and the horizontal plane. The horizontal plane may refer to a plane perpendicular to the vertical direction or a plane nearly perpendicular to the vertical direction. The horizontal plane can refer to Figure 4 The XY plane in .

[0057] The design of α ≥ 12.5° enables the lens 12111 of the image acquisition unit 121 to tilt upward, meeting the detection requirements of vehicles 2000 of different heights. The design of α ≤ 18.5° prevents the lens 12111 of the image acquisition unit 121 from tilting upward too much, thereby causing the wheel to be outside the shooting field of view of the image acquisition unit 121. 12.5° ≤ α ≤ 18.5°. It is understood that the value of α can be 12.5°, 18.5°, or any value between 12.5° and 18.5°; for example, the value of α can be, but is not limited to, 12.5°, 13°, 14°, 15°, 16°, 17°, 18°, and 18.5°.

[0058] By adopting the technical solution of this embodiment, the wheels of most vehicle models of different heights can be located within the field of view of the image acquisition unit 121, so that the wheel detection device 100 can meet the four-wheel alignment detection requirements of most vehicle models of different heights.

[0059] In some embodiments, the angle between the optical axis of the lens 12111 of the image acquisition unit 121 and the auxiliary plane is in the range of 14° to 20°, and the auxiliary plane is perpendicular to the width direction of the vehicle 2000 .

[0060] When the wheel detection device 100 is in the detection state, the auxiliary plane may refer to a vertical plane perpendicular to or nearly perpendicular to the width direction of the vehicle 2000. Figure 4 wherein the width direction of the vehicle 2000 is parallel to the width direction of the lift, and the width direction of the vehicle 2000 may also refer to the width direction of the lift.

[0061] The angle between the optical axis of the lens 12111 of the image acquisition unit 121 and the auxiliary plane is β, where 14°≤β≤20°; it can be understood that the value of β can be 14°, 20° or any value between 14° and 20°; for example, the value of β can be but is not limited to 14°, 15°, 16°, 17°, 18°, 19°, and 20°.

[0062] The design of β≥14° enables the lens 12111 of the image acquisition unit 121 to be tilted toward the vehicle 2000, which can meet the detection requirements of vehicles 2000 of different widths. The design of β≤20° prevents the lens 12111 of the image acquisition unit 121 from tilting too much toward the vehicle 2000, causing the wheel to be outside the shooting field of view of the image acquisition unit 121.

[0063] By adopting the technical solution of this embodiment, wheels of most vehicle models of different widths can be located within the field of view of the image acquisition unit 121, so that the wheel detection device 100 can meet the wheel detection requirements of most vehicle models of different widths.

[0064] In some embodiments, the angle between the optical axis of the lens 12111 of the image acquisition unit 121 and the horizontal plane is in the range of 12.5° to 18.5°, and the angle between the optical axis of the lens 12111 of the image acquisition unit 121 and the auxiliary plane is in the range of 14° to 20°, and the auxiliary plane is perpendicular to the width direction of the vehicle 2000.

[0065] By adopting the technical solution of this embodiment, the wheels of most vehicle models can be located within the field of view of the image acquisition unit 121, so that the wheel detection device 100 can meet the detection requirements of most vehicle models 2000.

[0066] In some embodiments, see Figures 4-6 As shown, the image acquisition unit 121 includes a camera 1211 and a fill light 1212 , and the fill light 1212 is used to provide fill light for the camera 1211 .

[0067] The camera 1211 may refer to a component capable of taking pictures. The camera 1211 may be, but is not limited to, a black and white camera, a color camera, an infrared camera, etc.

[0068] The fill light 1212 may be a lamp that can emit light, and the fill light 1212 may be, but is not limited to, an LED lamp, an incandescent lamp, etc.

[0069] By adopting the technical solution of this embodiment, the fill light 1212 can provide light to the camera 1211, so that the image information of the first calibration part 200 captured by the camera 1211 is clearer, which is conducive to improving the detection accuracy of the wheel detection device 100.

[0070] In some embodiments, see Figures 4-6 As shown, the fill light 1212 includes a substrate 12121 and a plurality of light-emitting components 12122 installed on the substrate 12121. The substrate 12121 is provided with a through hole 1212a. The lens 12111 of the camera 1211 is passed through the through hole 1212a. The plurality of light-emitting components 12122 are distributed along the circumference of the lens 12111 of the camera 1211.

[0071] The substrate 12121 may refer to a plate for supporting the light-emitting element 12122 . The substrate 12121 may be a circuit board. The circuit board may provide electrical energy to the light-emitting element 12122 and also support the light-emitting element 12122 .

[0072] The light-emitting component 12122 may refer to a component that can emit light. The light-emitting component 12122 may be, but is not limited to, an LED, a light bulb, etc.

[0073] The through hole 1212a passes through the two opposite surfaces of the substrate 12121 along the thickness direction, and the lens 12111 of the camera 1211 is penetrated in the through hole 1212a, so that the lens 12111 of the camera 1211 can be exposed from the through hole 1212a, thereby photographing the first calibration part 200; the optical axis of the lens 12111 of the camera 1211 can coincide with or nearly coincide with the axis of the through hole 1212a, so as to facilitate the subsequent uniform distribution of multiple light-emitting parts 12122 on the surrounding side of the lens 12111 of the camera 1211.

[0074] The number of the light-emitting elements 12122 is greater than or equal to two, for example, three, four, five, or ten.

[0075] The plurality of light emitting elements 12122 are distributed along the circumference of the lens 12111 of the camera 1211 , and the plurality of light emitting elements 12122 are distributed at intervals along the circumference of the lens 12111 of the camera 1211 .

[0076] In some examples, the plurality of light emitting elements 12122 are distributed in a circular array around the axis of the through hole 1212a. The plurality of light emitting elements 12122 are arranged regularly, and the fill light of the camera 1211 is uniform and has a good fill light effect. The plurality of light emitting elements 12122 can be distributed in one circle or multiple circles.

[0077] By adopting the technical solution of this embodiment, multiple light-emitting parts 12122 are distributed along the circumference of the lens 12111 of the camera 1211, and light is emitted from the circumferential side of the lens 12111 of the camera 1211, which has a good fill-in light effect. This is beneficial to improving the clarity of the image information of the first calibration part 200 captured by the camera 1211 and improving the detection accuracy of the wheel detection device 100.

[0078] In some embodiments, see Figures 4-6 As shown, the image acquisition unit 121 further includes a first bracket 1213 and a second bracket 1214 installed on the mounting base 110 and spaced apart. The camera 1211 is installed on the first bracket 1213 , and the fill light 1212 is installed on the second bracket 1214 .

[0079] The first bracket 1213 and the second bracket 1214 are used to fix the components of the camera 1211 and the fill light 1212 respectively; the camera 1211 can be fixed to the first bracket 1213 by fasteners (for example: screws, bolts, etc.), bonding, clamping, etc., and the fill light 1212 can be fixed to the second bracket 1214 by fasteners (for example: screws, bolts, etc.), bonding, clamping, etc.

[0080] For example, the first bracket 1213 can be made up of multiple parts, and the multiple parts can be spliced together to form an inclined first fixed surface more easily. By installing the camera 1211 on the first fixed surface, the lens 12111 of the camera 1211 can be installed at an angle, which reduces the difficulty of installing the camera 1211 and improves the accuracy of the installation position of the camera 1211. Of course, the first bracket 1213 can be an integrated molded structure or other structures.

[0081] For example, the second bracket 1214 can be formed by bending a plate. The bent plate can easily form an inclined second fixing surface. By mounting the fill light 1212 on the second fixing surface, the fill light 1212 can be installed at an angle, reducing the difficulty of installing the fill light 1212. The inclination of the fill light 1212 can be adapted to the inclination of the lens 12111 of the camera 1211, thereby improving the shooting effect of the camera 1211. Of course, in other examples, the second bracket 1214 can also have other structures.

[0082] The first bracket 1213 and the second bracket 1214 are spaced apart from each other, so that there is a certain gap between the first bracket 1213 and the second bracket 1214 and they do not contact each other.

[0083] By adopting the technical solution of this embodiment, the first bracket 1213 and the second bracket 1214 are not in contact, and the camera 1211 and the fill light 1212 are fixed relatively independently, thereby reducing the impact of factors such as the shaking of the fill light 1212 on the camera 1211, which is beneficial to improving the clarity of the image information of the first calibration part 200 captured by the camera 1211 and improving the detection accuracy of the wheel detection device 100.

[0084] In some embodiments, see Figure 1 and Figure 7 As shown, the mounting base 110 has a magnetic surface 111 a , and the magnetic surface 111 a can be magnetically fixed to the supporting mechanism 3000 for supporting the vehicle 2000 .

[0085] The supporting mechanism 3000 may refer to a mechanism for supporting the vehicle 2000 . The supporting mechanism 3000 may be the aforementioned lift. The vehicle 2000 is parked on the supporting mechanism 3000 to facilitate detection of the wheel 2100 to be tested of the vehicle 2000 .

[0086] The magnetic surface 111 a may refer to a surface of the mounting base 110 used for magnetic fixation with the supporting mechanism 3000 .

[0087] In some examples, the mounting base 110 has a magnetic member 1111 exposed on the mounting base 110 . The magnetic member 1111 is directly attracted to the supporting mechanism 3000 , and the surface where the magnetic member 1111 contacts the supporting mechanism 3000 is the magnetic surface 111 a .

[0088] In some examples, the mounting base 110 has a magnetic member 1111, which is installed inside the mounting base 110. The magnetic member 1111 can be magnetically adsorbed to the supporting mechanism 3000 through the mounting base 110, and the surface where the mounting base 110 contacts the supporting mechanism 3000 is the magnetic surface 111a.

[0089] In some examples, the magnetic attraction member 1111 can be but is not limited to a magnet or an iron member; when the magnetic attraction member 1111 is a magnet, the supporting mechanism 3000 can be provided with a magnet or an iron member that is magnetically attracted to the magnet; when the magnetic attraction member 1111 is an iron member, the supporting mechanism 3000 is provided with a magnet that is magnetically attracted to the iron member.

[0090] In some examples, the number of magnetic parts can be one or more, for example: two, three, four, etc.; for example, the number of magnetic parts 1111 is three, and the three magnetic parts 1111 are arranged at intervals along the length direction of the vehicle 2000. The three magnetic parts 1111 are magnetically attracted to the surface of the supporting mechanism 3000 to form a magnetic surface 111a together, so that multi-point magnetic attraction can be formed between the mounting base 110 and the supporting mechanism 3000, which can improve the connection reliability between the mounting base 110 and the supporting mechanism 3000.

[0091] By adopting the technical solution of this embodiment, the mounting base 110 can be magnetically fixed on the supporting mechanism 3000 through the magnetic surface 111a. The mounting base 110 has good fixing stability, the image acquisition unit 121 has good shooting stability, and the clarity of the image information of the first calibration part 200 is better, which is conducive to improving the detection accuracy of the vehicle 2000. In addition, the magnetic connection method is adopted to facilitate the installation and position adjustment of the wheel detection device 100.

[0092] In some embodiments, see Figure 8 As shown, the height difference between the lens 12111 of the image acquisition unit 121 and the magnetic surface 111 a ranges from 100 mm to 160 mm.

[0093] The height difference between the lens 12111 of the image acquisition unit 121 and the magnetic surface 111 a may refer to a height difference between the center of the mirror surface of the lens 12111 of the image acquisition unit 121 and the center of the magnetic surface 111 a .

[0094] The height difference between the lens 12111 of the image acquisition unit 121 and the magnetic surface 111a is H, where 100 mm ≤ H ≤ 160 mm. The value of H can be 100 mm, 160 mm, or any value between 100 mm and 160 mm. For example, the value of H can be, but is not limited to, 100 mm, 110 mm, 120 mm, 130 mm, 140 mm, 150 mm, or 160 mm.

[0095] With a design of H≥100mm, when the magnetic surface 111a is magnetically attracted to the side of the carrying mechanism 3000, the image acquisition unit 121 can be located above the carrying platform of the carrying mechanism 3000, which can reduce the obstruction of the field of view of the image acquisition unit 121 for acquiring the first calibration piece 200 by the carrying mechanism 3000, and is conducive to the first calibration piece 200 being close to the center of the field of view of the image acquisition unit 121, and is conducive to the image acquisition unit 121 acquiring clear image information of the first calibration piece 200, thereby improving the detection accuracy of the vehicle 2000; with a design of H≤160mm, the lens 12111 of the image acquisition unit 121 is not set too high, and is conducive to the first calibration piece 200 being close to the center of the field of view of the image acquisition unit 121, and is conducive to the image acquisition unit 121 acquiring clear image information of the first calibration piece 200, thereby improving the detection accuracy of the vehicle 2000.

[0096] By adopting the technical solution of this embodiment, the first calibration piece 200 is facilitated to be close to the center of the field of view of the image acquisition unit 121, so that the image acquisition unit 121 can obtain clear image information of the first calibration piece 200, thereby improving the detection accuracy of the vehicle 2000.

[0097] In some embodiments, see Figure 8 As shown, along the width direction of the vehicle 2000, the distance between the lens 12111 of the image acquisition unit 121 and the magnetic attraction surface 111a ranges from 160 mm to 220 mm.

[0098] The distance between the lens 12111 of the image acquisition unit 121 and the magnetic surface 111 a along the width direction of the vehicle 2000 may refer to the distance between the center of the mirror surface of the lens 12111 and the magnetic surface 111 a in the width direction of the vehicle 2000 .

[0099] Along the width direction of vehicle 2000, the distance between lens 12111 of image acquisition unit 121 and magnetic surface 111a is L, where 160 mm ≤ L ≤ 220 mm. The value of L can be 160 mm, 220 mm, or any value between 160 mm and 220 mm. For example, the value of L can be, but is not limited to, 160 mm, 170 mm, 180 mm, 190 mm, 200 mm, 210 mm, or 22 mm.

[0100] The design of L≥160mm allows a distance to exist between the lens 12111 of the image acquisition unit 121 and the vehicle 2000, increasing the field of view of the image acquisition unit 121 for acquiring the first calibration part 200, which is beneficial for the image acquisition unit 121 to acquire clear image information of the first calibration part 200, and can also meet the detection requirements of vehicles 2000 of different widths; the design of L≤220mm allows the lens 12111 of the image acquisition unit 121 not to be too far away from the vehicle 2000, so that the image acquisition unit 121 can acquire clear image information of the first calibration part 200.

[0101] By adopting the technical solution of this embodiment, the image acquisition unit 121 can obtain clear image information of the first calibration piece 200, thereby improving the detection accuracy of the wheel detection device 100.

[0102] In some embodiments, see Figure 8 As shown, the height difference between the lens 12111 of the image acquisition unit 121 and the magnetic surface 111a ranges from 100mm to 160mm, and along the width direction of the vehicle 2000, the distance between the lens 12111 of the image acquisition unit 121 and the magnetic surface 111a ranges from 160mm to 220mm.

[0103] By adopting the technical solution of this embodiment, the image acquisition unit 121 can obtain clear image information of the first calibration piece 200, thereby improving the detection accuracy of the wheel detection device 100.

[0104] In some embodiments, see Figure 7 and Figure 8 As shown, the mounting base 110 includes a base 111 and a support assembly 112. The base 111 is elongated, with a magnetic surface 111a formed on one end of the base 111. The support assembly 112 is mounted on the other end of the base 111, and the image acquisition unit 121 is mounted on the support assembly 112. During inspection, the magnetic surface 111a of the base 111 is attracted to and perpendicular to the side of the supporting mechanism 3000, while the image acquisition unit 121 is mounted on the support assembly 112 at the other end of the base 111. This creates a certain distance between the lens 12111 of the image acquisition unit 121 and the vehicle 2000 in the width direction of the vehicle 2000. At the same time, the support assembly 112 can also elevate the image acquisition unit 121, thereby creating a height difference between the lens 12111 of the image acquisition unit 121 and the magnetic surface 111a. This mounting base 110 has a simple structure and is lightweight, which facilitates the use of the wheel inspection device 100. Of course, in other examples, the mounting base 110 can also have other structures.

[0105] In some embodiments, the support assembly 112 also includes a support frame 1121 and a mounting plate 1122. The support frame 1121 is installed on the base 111, and the mounting plate 1122 is installed on the support frame 1121. The surface of the mounting plate 1122 facing away from the support frame 1121 forms a mounting surface 11221, and the image acquisition unit 121 is installed on the mounting surface 11221. The structure of the support assembly 112 is simple and easy to process and manufacture.

[0106] In some examples, a battery is provided in the base 111 , and the battery is used to power the camera 1211 and the control device 130 .

[0107] In some embodiments, an indicator unit 1112 is provided at the end of the base 111 facing away from the magnetic surface 111a. The indicator unit 1112 is used to display the working status of the wheel detection device 100 to facilitate the use of the wheel detection device 100. The indicator unit 1112 can be but is not limited to an indicator light or a display panel.

[0108] In some embodiments, see Figure 1 and Figure 4 As shown, there are two image acquisition units 121 , and the two image acquisition units 121 respectively capture image information of the first calibration parts 200 of the two wheels 2100 to be tested located on the first side of the vehicle 2000 .

[0109] Among the two image acquisition units 121, one image acquisition unit 121 is used to capture image information of the first calibration piece 200 located on the front wheel on the first side, and the other image acquisition unit 121 is used to capture image information of the first calibration piece 200 located on the rear wheel on the first side.

[0110] In some examples, the wheel detection device 100 is located between the front and rear wheels on the first side, and the two image acquisition units 121 are symmetrically arranged front to back, so as to facilitate the acquisition of image information of the first calibration piece 200 on the two wheels to be tested 2100 located on the first side.

[0111] By adopting the technical solution of this embodiment, the wheel detection device 100 can simultaneously integrate two image acquisition units 121, which is beneficial to improving the integration of the wheel detection device 100 and facilitating the detection of the wheel detection device 100; the wheel detection device 100 can simultaneously obtain image information of the first calibration part 200 on the two wheels located on the first side, thereby improving the detection efficiency of the wheel detection device 100.

[0112] In some embodiments, see Figure 4 As shown, the control device 130 may be disposed between the two image acquisition units 121 to facilitate electrical connection between the control device 130 and the two image acquisition units 121 .

[0113] In some embodiments, see Figure 1 as well as Figures 7-10 As shown, the wheel detection device 100 also includes a position detection module 140, which includes a second calibration component 141 and a first image acquisition component 142. The second calibration component 141 is used for the second image acquisition component of the wheel detection device 100 located on the second side of the vehicle 2000 to shoot, so as to obtain image information of the second calibration component 141; the first image acquisition component 142 is used for shooting the third calibration component of the wheel detection device 100 located on the second side of the vehicle 2000, so as to obtain image information of the third calibration component. The control device 130 is connected to the first image acquisition component 142 to receive the image information of the third calibration component and process the image information of the third calibration component; the first side and the second side are respectively the opposite sides of the vehicle 2000 along the width direction.

[0114] During detection, there are two wheel detection devices 100. The wheel detection device 100 located on the first side is the first wheel detection device 101, and the wheel detection device 100 located on the second side is the second wheel detection device 102. The first wheel detection device 101 includes a second calibration component 141 and a first image acquisition component 142, and the second wheel detection device 102 includes a third calibration component and a second image acquisition component. The first wheel detection device 101 and the second wheel detection device 102 are arranged relative to each other, and the second image acquisition component captures the image information of the second calibration component 141, and the first image acquisition component 142 captures the image information of the third calibration component, thereby realizing the first wheel detection device 101 and the second wheel detection device 102. The two wheel detection devices 102 observe each other; the first image acquisition component 142 transmits the image information of the second calibration component 141 to the control device 130 of the first wheel detection device 101, and the control device 130 of the first wheel detection device 101 processes the image information of the second calibration component 141. The second image acquisition component transmits the image information of the third calibration component to the control device 130 of the second wheel detection device 102, and the second wheel detection device 102 processes the image information of the third calibration component to facilitate the analysis of the image information of the second calibration component 141 and the image information of the third calibration component to obtain the position information of the first wheel detection device 101 and the second wheel detection device 102. In this process, through the mutual observation of the first wheel detection device 101 and the second wheel detection device 102, the position information between the first wheel detection device 101 and the second wheel detection device 102 can be more accurately determined, which is conducive to improving the detection accuracy of the wheel detection device 100. The structures of the first wheel detection device 101 and the second wheel detection device 102 can be the same or different.

[0115] Optionally, the first wheel detection device 101 and the second wheel detection device 102 can be communicatively connected, and the control devices of the first wheel detection device 101 and the second wheel detection device 102 can obtain the image information of the second calibration part 141 and the image information of the third calibration part and process them to obtain the position information between the first wheel detection device 101 and the second wheel detection device 102.

[0116] The first side and the second side refer to the left side and the right side of the vehicle 2000, respectively.

[0117] The second calibration member 141 and the third calibration member may be targets; the structures of the first calibration member 200 , the second calibration member 141 and the third calibration member may be the same or different.

[0118] In some examples, the second calibration member 141 includes a stacked light board 1411, a diffuser plate 1412, and a target plate 1413. The diffuser plate 1412 is located between the light board 1411 and the target plate 1413. The light emitted by the light board 1411 is scattered by the diffuser plate 1412 and then emitted through the target plate 1413, thereby realizing the self-luminescence of the second calibration member 141. The second image acquisition member photographs the self-luminous second calibration member 141 to obtain clear image information of the second calibration member 141, which is beneficial to improving the detection accuracy of the wheel detection device 100. Among them, the setting of the diffuser plate 1412 can diffuse the light emitted by the light board 1411, which is beneficial to improving the uniformity of the luminescence of the second calibration member 141, and is also beneficial to the second image acquisition member photographing clearer image information of the second calibration member 141.

[0119] In some examples, the number of the second calibration member 141 may be one, and the surface of the target plate 1413 of the second calibration member 141 facing away from the light board 1411 forms a step surface. The second image acquisition member photographs the step surface to obtain three-dimensional image information. The position information between the first wheel detection device 101 and the second wheel detection device 102 is obtained based on the three-dimensional image information, which is conducive to improving the detection accuracy of the wheel detection device 100.

[0120] In some examples, there are multiple second calibration members 141, and the multiple second calibration members 141 are arranged around the front, back, left and right sides of the first image acquisition member 142, and the heights of the second calibration members 141 are different. In this way, the multiple second calibration members 141 can form a three-dimensional structure. The second image acquisition member shoots multiple second calibration members 141 to obtain three-dimensional image information, thereby improving the accuracy of the position information of the subsequent wheel detection device 100. In addition, the distribution of the multiple second calibration members 141 can increase the distance difference between the front and back or left and right of the two second calibration members 141. The image information of the second calibration members 141 obtained by the second image acquisition member has a higher three-dimensional degree, and can be parsed to obtain more accurate detection of the position information between the first wheel detection device 101 and the second wheel detection device 102, which is beneficial to improving the detection accuracy of the wheel detection device 100.

[0121] The first image acquisition component 142 and the second image acquisition component may refer to components capable of capturing images, such as cameras, webcams, etc.

[0122] By adopting the technical solution of this embodiment, when in use, the first image acquisition component 142 shoots the third calibration component to obtain image information of the third calibration component, and the second image acquisition component shoots the second calibration component 141 to obtain image information of the second calibration component 141. In this way, analysis can be performed based on the image information of the third calibration component and the image information of the second calibration component 141 to obtain the position information between the two wheel detection devices 100. During the analysis process, the two image information can be used as a reference to each other, thereby improving the accuracy of the position information between the two wheel detection devices 100 and improving the accuracy of the four-wheel alignment detection.

[0123] In some embodiments, the position detection module 140 also includes a third bracket 143 and a fourth bracket 144 fixed to the mounting base 110, the second calibration component 141 is installed on the third bracket 143, and the first image acquisition component 142 is installed on the fourth bracket 144, thereby achieving the fixation of the second calibration component 141 and the first image acquisition component 142.

[0124] In some examples, the third bracket 143 is located between the light board 1411 and the diffuser plate 1412. The light board 1411, the diffuser plate 1412, and the target plate 1413 are fixed to the third bracket 143 together, eliminating the need to separately fix the light board 1411, the diffuser plate 1412, and the target plate 1413. This simplifies the fixation of the second calibration member 141. The light board 1411, the diffuser plate 1412, and the target plate 1413 can be fixed to the third bracket 143 using fasteners (e.g., screws, etc.). The light board 1411 can be, but is not limited to, an LED board.

[0125] In some embodiments, the position detection module 140 and the image acquisition module 120 are both installed on the mounting base 110, and the position detection module 140 is located on the side of the image acquisition module 120 facing the vehicle 2000. Such distribution can facilitate the image acquisition unit 121 and the first image acquisition component 142 to capture image information.

[0126] In some examples, both the position detection module 140 and the image acquisition module 120 are mounted on the mounting surface 11221. Mounting the position detection module 140 and the image acquisition module 120 on the same surface improves the accuracy of the relative fixed position between the position detection module 140 and the image acquisition module 120, thereby improving the detection accuracy of the wheel detection device 100. Specifically, the third bracket 143, the fourth bracket 144, the first bracket 1213, and the second bracket 1214 can be secured to the mounting surface 11221 using fasteners (e.g., screws), clamping, or bonding.

[0127] In some embodiments, see Figure 2 and Figure 3 As shown, the wheel detection device 100 further includes a housing 150 mounted on the mounting base 110 . The housing 150 covers the position detection module 140 and the image acquisition module 120 to protect the position detection module 140 and the image acquisition module 120 .

[0128] In some embodiments, see Figure 2 and Figure 3 As shown, the housing 150 includes a shell 151, and the shell 151 is provided with a first window 1514 and a second window 1515. The first window 1514 is used to expose the second calibration member 141, thereby facilitating the shooting of the second image acquisition member; the second window 1515 is used to expose the lens 12111 of the image acquisition unit 121, thereby facilitating the image acquisition unit 121 to shoot the first calibration member 200.

[0129] In some embodiments, see Figure 2 and Figure 3As shown, the housing 150 further includes a light-transmitting member 152, which is installed within the first window 1514 to seal the first window 1514. The light-transmitting member 152 allows light emitted by the second calibration member 141 to pass through, facilitating image capture by the second image acquisition member. The light emitted by the second calibration member 141 can be visible light or invisible light, such as infrared light. The invisible light emitted by the second calibration member 141 can reduce the impact of external ambient light of the wheel detection device 100 on the image information captured by the second image acquisition member, thereby improving the accuracy of image feature extraction from the second calibration member 141. The light-transmitting member 152 allows light emitted by the second calibration member 141 to pass through, while not allowing at least some visible light to pass through. This reduces the impact of external ambient light of the wheel detection device 100 on the image information captured by the second image acquisition member, thereby improving the accuracy of image feature extraction from the second calibration member 141.

[0130] In some embodiments, see Figure 2 and Figure 3 As shown, the housing 151 is formed with a handle 1516 for a person to hold, thereby facilitating the use of the wheel detection device 100 .

[0131] In some embodiments, see Figure 2 and Figure 3 As shown, the housing 151 may include multiple parts, which may be formed separately and then assembled together, or may be formed as one piece.

[0132] For some examples, see Figure 2 and Figure 3 As shown, the shell 151 includes a first shell 1511 and a second shell 1512. The first shell 1511 and the second shell 1512 are spliced and enclosed to form an installation space for installing the position detection module 140 and the image acquisition module 120; the third shell 1513 is mounted on the ends of the first shell 1511 and the second shell 1512 near the first window 1514 to fix and protect the first shell 1511 and the second shell 1512. This design can facilitate the production and processing of the wheel detection device 100.

[0133] In some embodiments, see Figure 1 As shown, the four-wheel aligner 1000 includes the wheel detection device 100 according to the above embodiment.

[0134] The four-wheel aligner 1000 of the embodiment of the present application adopts the above-mentioned wheel detection device 100, which can be applied to the detection requirements of different vehicle models, expand the application scope of the four-wheel aligner 1000, and improve the versatility of the detection of the four-wheel aligner 1000.

[0135] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A wheel detection device, characterized in that: include: A mounting base, configured to be mounted on a first side of a vehicle and located on the same side as a wheel to be tested of the vehicle, wherein the first side is one of the sides of the vehicle that is opposite to each other in a width direction; An image acquisition module is mounted on the mounting seat; the image acquisition module includes an image acquisition unit, the lens of the image acquisition unit is tilted upward and facing the wheel to be tested, and the image acquisition unit is used to capture image information of the first calibration piece fixed to the wheel to be tested; A control device is connected to the image acquisition unit to receive image information of the first calibration component and process the image information of the first calibration component.

2. The wheel detection device according to claim 1, characterized in that: The angle between the optical axis of the lens of the image acquisition unit and the horizontal plane is in the range of 12.5° to 18.5°; And / or, the angle between the optical axis of the lens of the image acquisition unit and the auxiliary plane is in the range of 14° to 20°, and the auxiliary plane is perpendicular to the width direction of the vehicle.

3. The wheel detection device according to claim 1, characterized in that: The image acquisition unit includes a camera and a fill light, and the fill light is used to provide fill light to the camera.

4. The wheel detection device according to claim 3, characterized in that: The fill light includes a substrate and a plurality of light-emitting components mounted on the substrate. The substrate is provided with a through hole, the camera lens is passed through the through hole, and the plurality of light-emitting components are distributed along the circumference of the camera lens.

5. The wheel detection device according to claim 3, characterized in that: The image acquisition unit further includes a first bracket and a second bracket installed on the mounting base and spaced apart from each other. The camera is installed on the first bracket, and the fill light is installed on the second bracket.

6. The wheel detection device according to any one of claims 1 to 5, characterized in that: The mounting seat has a magnetic surface, and the magnetic surface can be magnetically fixed to a supporting mechanism for supporting a vehicle.

7. The wheel detection device according to claim 6, characterized in that: The height difference between the lens of the image acquisition unit and the magnetic surface ranges from 100 mm to 160 mm; And / or, along the width direction of the vehicle, the distance between the lens of the image acquisition unit and the magnetic surface ranges from 160 mm to 220 mm.

8. The wheel detection device according to any one of claims 1 to 5, characterized in that: There are two image acquisition units, and the two image acquisition units respectively capture image information of the first calibration parts of the two wheels to be tested located on the first side of the vehicle.

9. The wheel detection device according to any one of claims 1 to 5, characterized in that: The wheel detection device further includes a position detection module, which includes a second calibration member and a first image acquisition member. The second calibration member is used to be photographed by a second image acquisition member of the wheel detection device located on the second side of the vehicle to obtain image information of the second calibration member. The first image acquisition member is used to photograph a third calibration member of the wheel detection device located on the second side of the vehicle to obtain image information of the third calibration member. The control device is connected to the first image acquisition member to receive the image information of the third calibration member and process the image information of the third calibration member. The first side and the second side are opposite sides of the vehicle in a width direction.

10. A four-wheel aligner, characterized in that: The invention comprises the wheel detection device according to any one of claims 1 to 9.

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