Vehicle-mounted camera assembly auxiliary device and method

Abstract

The invention relates to the technical field of vehicle-mounted camera assembly, in particular to a vehicle-mounted camera assembly auxiliary device and method. The device comprises a limiting device and a positioning device, the limiting device comprises a fixing part, the fixing part is horizontally arranged, two limiting parts are symmetrically arranged on the lower sides of the two ends of the fixing part, a limiting groove is formed between the two limiting parts, and the positioning device is fixedly connected to the middle of the front side face of the fixing part; the method comprises the following steps: checking the vehicle-mounted camera assembly auxiliary device before the first use; the vehicle-mounted camera assembling auxiliary device is adjusted and fixed; the camera is installed on the installation black area of the front windshield; and checking whether the camera is installed in place or not. According to the invention, the camera installation out-of-tolerance can be prevented, the out-of-tolerance condition can be verified, the calibration success rate of the camera involved in the commercial vehicle driving assistance system can be better guaranteed, and the problems of difficulty in finding a positioning point near the camera assembly, difficulty in fixing and poor universality in the prior art are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle-mounted camera assembly, and in particular to a vehicle-mounted camera assembly auxiliary device and method. Background Art

[0002] Driving assistance systems refer to active safety technologies that provide assistance to drivers. These systems are designed to improve driving safety and convenience. Commercial vehicles are generally equipped with lane departure warning systems and front vehicle collision preload systems, while more advanced commercial vehicles are equipped with lane keeping assist systems and active emergency braking systems.

[0003] The camera is an important component of these systems, and its calibration is also an indispensable part of the successful operation of the driving assistance function. In order to ensure the safety of the driver and other passengers involved in the driving assistance system and to cope with the complexity of actual working conditions, the calibration of the camera has extremely high requirements for its assembly accuracy, vehicle status and environment. In the actual calibration process, the camera needs to be pasted on the assembly black area inside the front windshield of the car. The operator needs to align it with the naked eye and install it manually. It is very easy to exceed the tolerance and the vehicle cannot ensure that the posture is completely aligned when it drives to the calibration station. Therefore, even if the target has a certain ability to adapt to the parking posture of the vehicle, if the above two reasons cause the camera to deviate significantly when facing the target, there is a high probability that the camera will exceed the calibration range and cause the calibration to fail.

[0004] CN112407106B provides a method and device for installing a split binocular camera, the method comprising: determining the central symmetric plane of the vehicle; determining the target horizontal line by a first level meter located on the front windshield; determining the installation feature point by a second and third level meter located on the front windshield; the second and third level meters are located on both sides of the central symmetric plane, when the horizontal calibration lines emitted by the second and third level meters coincide with the target horizontal line, and the distances between the second and third level meters and the central symmetric plane are both half of the target baseline of the binocular camera, the intersection of the vertical calibration lines emitted by the second and third level meters and the target horizontal line is the installation feature point. However, the prior art is relatively complex and does not disclose a technical solution to ensure the precise installation angle of the camera.

[0005] CN216424285U discloses a portable suction cup type front camera installation tooling, including a positioning tooling and a pressing tooling. The positioning tooling includes a suction cup handle, a first suction cup, and a positioning frame. The positioning frame is connected to the first suction cup through a steering control member. The first suction cup is connected to the windshield. A suction cup handle is provided on the suction cup. The camera is pasted at the position of the windshield restricted by the positioning frame. The pressing tooling includes a fixing plate. A threaded hole is provided in the middle of the fixing plate. A screw rod is provided in the threaded hole. The upper end of the screw rod is connected to a rotating handle, and the lower end of the screw rod is connected to a pressing head. The pressing head presses above the camera. Both ends of the fixing plate are respectively connected to a second suction cup through a connecting frame. The second suction cup is connected to the windshield. A suction cup handle is provided on the second suction cup. However, the prior art cannot ensure that the camera is installed in place without out-of-tolerance situations. Summary of the Invention

[0006] The purpose of the present invention is to provide an auxiliary device and method for assembling a vehicle-mounted camera, which can prevent out-of-tolerance through an auxiliary tooling during the auxiliary assembly and check the out-of-tolerance situation of the camera, and can better ensure the calibration success rate of the camera involved in the commercial vehicle driving assistance system, and solve the problems of difficult positioning points, difficult fixation, and poor versatility in the prior art for camera assembly.

[0007] The present invention provides the following solutions

[0008] An auxiliary device for assembling a vehicle-mounted camera includes a limiting device and a positioning device. The limiting device includes a fixing part, the fixing part is horizontally arranged, and two limiting parts are symmetrically arranged on the lower sides of both ends of the fixing part. A limiting groove is formed between the two limiting parts. The positioning device is fixedly connected to the middle of the front end face of the fixing part.

[0009] A limiting groove is formed between the two limiting parts, which is used to position the left and right positions of the camera when installing the camera, and the positioning device is used for positioning to make the yaw angle of the camera meet the installation requirements.

[0010] Furthermore, the whole limiting device is in a "冂"-shaped plate structure. Suction cups are respectively provided at the upper corners of both ends of the rear end face of the fixing part. The bottom edges of the two limiting parts are both horizontal and collinear, and the inner sides of the limiting parts are perpendicular to the bottom edges.

[0011] Suction cups are respectively provided at the upper corners of both ends of the rear end face of the fixing part, which can be adsorbed on the front windshield to fix the whole device. The bottom edges of the two limiting parts can be attached to the connection part between the instrument panel and the front windshield. The inner sides of the limiting parts are perpendicular to the bottom edges to limit the installation of the camera.

[0012] Furthermore, a laser is provided on the lower surface of the positioning device. The laser line emitted by the laser is parallel to the inner side of the limiting part and coincides with the symmetry axis of the two limiting parts. A spirit level is provided on the front end face of the positioning device.

[0013] The laser emits a laser line, which cooperates with the level to make the camera roll angle 0°, meeting the installation requirements.

[0014] Furthermore, slide rails are arranged on the inner sides of the two limiting parts opposite to each other, and a limiting ruler is slidably connected between the two slide rails.

[0015] A limit ruler is set to limit the installation height of the camera, making installation more convenient. The limit ruler can slide up and down along the slide rail to adapt to vehicle models with different camera installation heights, thereby improving the versatility of the device.

[0016] A vehicle-mounted camera assembly method, based on the above-mentioned vehicle-mounted camera assembly auxiliary device, comprises the following steps:

[0017] Calibrate the vehicle camera assembly auxiliary device before first use;

[0018] Adjust and fix the vehicle camera assembly auxiliary device;

[0019] Install the camera on the black mounting area of ​​the front windshield;

[0020] Check whether the camera is installed properly.

[0021] Furthermore, the verification of the vehicle-mounted camera assembly auxiliary device before the first use includes the following steps:

[0022] Place the bottom edge of the limiting part of the limiting device close to the connection between the instrument panel and the front windshield;

[0023] Turn on the laser and adjust the limit device parallel to the left and right sides so that the laser line passes through the center of the positioning mark in the black area of ​​the front windshield installation;

[0024] Adsorbing the suction cup of the fixing part onto the front windshield;

[0025] Determine whether the inner side of the limit portion coincides with the left and right sides of the rectangular installation area of ​​the installation black area:

[0026] If not, the verification fails and the auxiliary device needs to be adjusted or remade;

[0027] If so, observe whether the bubble of the level gauge on the positioning device is horizontal and centered;

[0028] If not, the verification fails and the auxiliary device needs to be adjusted or remade;

[0029] If yes, the verification passes;

[0030] The step of verifying whether the camera is installed properly includes the following steps:

[0031] Re-engage the two stoppers of the auxiliary tooling with the stoppers on both sides of the camera, and slide from top to bottom until the bottom edge of the stoppers touches the instrument panel;

[0032] Observe whether the bubble of the level gauge on the positioning device is horizontal and centered;

[0033] If yes, the camera is installed within tolerance and the installation is complete;

[0034] If not, the camera assembly is out of tolerance. Check the camera and reassemble it.

[0035] Furthermore, the adjusting and fixing of the vehicle-mounted camera assembly auxiliary device includes:

[0036] Place the bottom edge of the limiting part of the limiting device close to the connection between the instrument panel and the front windshield;

[0037] Turn on the laser and adjust the limit device parallel to the left and right sides so that the laser line passes through the center of the positioning mark in the black area of ​​the front windshield installation;

[0038] Attach the suction cup of the fixing part of the limiting device to the front windshield.

[0039] Furthermore, the step of installing the camera on the installation black area of ​​the front windshield includes:

[0040] Plug the camera wiring harness into the camera;

[0041] Align the positioning groove on the top surface of the camera with the positioning mark, and stick it to the installation black area through the limiting groove of the limiting device;

[0042] After pasting, remove the auxiliary device.

[0043] Furthermore, the adjusting and fixing vehicle-mounted camera assembly auxiliary device also includes a sliding limit ruler, which is fixed after the bottom edge of the limit ruler coincides with the upper edge of the triangular positioning mark.

[0044] Furthermore, the step of installing the camera on the installation black area of ​​the front windshield includes:

[0045] Plug the camera wiring harness into the camera;

[0046] The top surface of the camera is brought into contact with the bottom edge of the limit ruler, and the limit device is pasted to the installation black area through the limit groove;

[0047] After pasting, remove the auxiliary device.

[0048] Compared with the prior art, the present invention has the following advantages:

[0049] The present invention provides a vehicle-mounted camera assembly auxiliary device and method, which ensures the camera assembly quality and verification through the auxiliary device and can adapt to a variety of vehicle models with different camera installation heights.

[0050] Through suction cup fixation and laser line positioning, the suction cup utilizes the characteristics of glass, and the auxiliary tooling can be firmly attached to the front windshield without adding weight; laser line positioning can be adapted to different cabs, and there is no need to make different auxiliary tooling for the different heights of the camera assembly black area on the front windshield. The auxiliary device has a simple structure, is easy to install, and has a low manufacturing cost. Through the integration of lasers and levels, the structure of the auxiliary tooling is simplified, its weight is reduced, making it easy to use and light, and it integrates assembly and verification functions; it solves the problems of the existing technology that it is difficult to find positioning points near the camera assembly, difficult to fix, and poor versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0052] Attached Figure 1 This is a schematic diagram of the structure of the vehicle camera assembly auxiliary device according to Embodiment 1 of the present invention;

[0053] Attached Figure 2 It is a schematic front view of the structure of the vehicle-mounted camera assembly auxiliary device according to Embodiment 1 of the present invention;

[0054] Attached Figure 3 A schematic rear view of the structure of the vehicle-mounted camera assembly auxiliary device according to Embodiment 1 of the present invention;

[0055] Attached Figure 4 This is a schematic diagram of the installation of the auxiliary device in the vehicle camera assembly method according to Embodiment 1 of the present invention;

[0056] Attached Figure 5 This is a schematic diagram of the structure of the vehicle camera assembly auxiliary device according to Embodiment 2 of the present invention;

[0057] Attached Figure 6 This is a schematic diagram of the installation of the auxiliary device in the vehicle camera assembly method according to Embodiment 2 of the present invention;

[0058] Attached Figure 7 This is a schematic diagram of the vehicle camera assembly method of the present invention;

[0059] Attached Figure 8A schematic diagram of a process for verifying the vehicle camera assembly auxiliary device before first use according to the present invention;

[0060] Attached Fig. 9 This is a schematic diagram of the process of installing a camera using an auxiliary device after the verification is passed according to Embodiment 1 of the present invention;

[0061] Attached Fig.10 This is a flow chart of installing a camera using an auxiliary device after the verification described in Example 2 of the present invention is passed.

[0062] In the figure:

[0063] 1-limiting device, 11-fixing part, 12-limiting part, 13-suction cup, 14-slide rail, 15-limiting ruler, 2-positioning device, 21-laser, 211-laser line, 22-leveler, 3-installation black area, 31-positioning mark. DETAILED DESCRIPTION

[0064] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0065] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings, and "multiple" generally includes at least two.

[0066] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0067] It should be understood that, although the terms first, second, third, etc. may be used to describe in the embodiments of the present application, these descriptions should not be limited to these terms. These terms are only used to distinguish the descriptions. For example, without departing from the scope of the embodiments of the present application, the first may also be referred to as the second, and similarly, the second may also be referred to as the first.

[0068] As used herein, the words "if" and "if" may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to determining" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)", depending on the context.

[0069] It should also be noted that the term "includes", "comprising" or any other variation thereof is intended to cover non-exclusive inclusion, so that a commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprising a ..." do not exclude the existence of other identical elements in the commodity or device including the elements.

[0070] It should be particularly noted that any symbols and / or numbers in the specification that are not marked in the accompanying drawings are not drawing marks.

[0071] The vehicle-mounted camera assembly auxiliary device provided in this embodiment is used for camera assembly calibration of commercial vehicles. The camera is square in shape as a whole, and the camera installation requirements are as follows:

[0072] 1. Camera installation yaw angle deviation: design value - 0°, tolerance - 3°;

[0073] 2. Camera installation pitch angle deviation: design value - 0°, tolerance - 3°;

[0074] 3. Camera installation roll angle deviation: design value - 0°, tolerance - 3°.

[0075] In view of the above situation, in order to improve the one-time success rate of camera calibration, it is necessary to improve from the source, that is, camera assembly.

[0076] Example 1, please refer to Figure 1 As shown, this embodiment provides a vehicle-mounted camera assembly auxiliary device, including a limiting device 1 and a positioning device 2, and the positioning device 2 is fixedly connected to the upper part of the limiting device 1.

[0077] Specifically, see Figures 1 to 3As shown, the limiting device 1 is made of PP board, which is light and portable, with a soft material and no risk of scratching the glass. The overall structure of the limiting device 1 is a "冂" shape, including a fixing part 11 which is horizontally arranged. At the lower sides of both ends of the fixing part 11, limiting parts 12 are symmetrically arranged. A limiting groove is formed between the two limiting parts 12 for limiting the camera during installation; at the upper corners of both ends of the rear side of the fixing part 11, suction cups 13 are respectively provided for adsorbing on the front windshield to fix the whole auxiliary device; the bottom edges of the two limiting parts 12 are both horizontally arranged and on the same straight line, and the bottom edges can be attached to the connecting part between the vehicle cab instrument panel and the front windshield; the inner side edges of the limiting parts 12 are vertically arranged at a 90° angle with the bottom edges, and the inner side edges are used for limiting the camera during installation to make its roll angle 0°.

[0078] The positioning device 2 is fixedly connected to the middle of the front side of the fixing part 11 of the limiting device 1. A laser device 21 is provided on the lower surface of the positioning device 2. The width of the laser line 211 emitted by the laser device 21 is less than 2 mm. The laser line 211 is parallel to the inner side edge of the limiting part 12 and coincides with the symmetry axis of the two limiting parts 12; a circular spirit level 22 is provided on the front side of the positioning device 2 for checking whether the roll angle of the camera installation exceeds the tolerance.

[0079] Please refer to Figure 4 and Figures 7 to 9 As shown, this embodiment also provides a method for assembling an in-vehicle camera. Based on the above-mentioned in-vehicle camera assembly auxiliary device, it includes the following steps:

[0080] Before using the in-vehicle camera assembly auxiliary device for the first time to assist in installing the camera, the auxiliary device needs to be calibrated, including,

[0081] Place the bottom edge of the limiting part 12 of the limiting device 1 in contact with the connecting part between the instrument panel and the front windshield;

[0082] Turn on the laser device 21 and adjust the limiting device 1 horizontally left and right so that the laser line 211 passes through the center of the triangular positioning mark 31 in the installation black area 3 of the front windshield;

[0083] Adsorb the suction cup 13 of the fixing part 11 on the front windshield;

[0084] Use an angle measuring device such as a protractor to measure whether the inner side edge of the limiting part 12 coincides with the left and right side edges of the rectangular-like installation area of the installation black area 3:

[0085] If they do not coincide, the calibration fails, and the auxiliary device needs to be adjusted or remade;

[0086] If they coincide, proceed to the next calibration;

[0087] Observe whether the bubble of the spirit level 22 on the positioning device 2 is at the Z-axis, that is, horizontally centered;

[0088] If not, the verification fails and the auxiliary device needs to be adjusted or remade;

[0089] If yes, the verification passes.

[0090] After verification, you can use auxiliary devices to install the camera, including:

[0091] Plug the camera wiring harness into the camera;

[0092] Place the bottom edge of the limiting portion 12 of the limiting device 1 close to the connection between the instrument panel and the front windshield;

[0093] Turn on the laser 21 and adjust the limit device 1 parallel to the left and right sides, so that the laser line 211 passes through the center of the triangular positioning mark 31 of the front windshield installation black area 3;

[0094] Adsorb the suction cup 13 of the fixing portion 11 onto the front windshield;

[0095] Tear off the adhesive paper on the camera, align the V-shaped positioning groove on the top surface of the camera with the positioning mark 31, and stick it from top to bottom through the limiting groove of the limiting device 1;

[0096] After pasting, remove the auxiliary device;

[0097] Re-engage the two limiting parts 12 of the auxiliary tooling with the limiting parts on both sides of the camera, and slide from top to bottom until the bottom edge of the limiting part 12 contacts the instrument panel;

[0098] Observe whether the bubble of the level gauge 22 on the positioning device 2 is on the Z axis, that is, horizontally centered;

[0099] If yes, the camera is installed within tolerance and the installation is complete;

[0100] If not, the camera assembly is out of tolerance. Check the camera and reassemble it.

[0101] In this embodiment, the camera is a square camera, and the limiting device 1 is made by machine cutting according to the width of the camera; the laser beam emitted by the laser 21 forms a certain angle with the front windshield, so a laser line 211 can be formed on the front windshield. To improve the positioning accuracy, the width of the laser line 211 should be less than 2 mm; the camera installation black area 3 of the front windshield includes a rectangular black area with the same shape and size as the camera pasting surface, and an inverted triangle positioning mark 31 is provided in the middle of the top edge, and a V-shaped positioning groove matching the positioning mark 31 is provided on the top surface of the camera. The existing installation method is usually to position and install by aligning the V-shaped positioning groove with the positioning mark 31; the level 22 used in this embodiment is a circular bubble level.

[0102] Embodiment 2, please refer to Figure 5 As shown, this embodiment provides an auxiliary device for assembling an in-vehicle camera, which adds the function of upper limit on the basis of Embodiment 1.

[0103] Specifically, the limiting device 1 is made of PP board, which is light and portable, with soft material and no risk of scratching the glass. The overall structure of the limiting device 1 is a "冂" shape, including a fixing part 11 which is horizontally arranged. At the lower sides of both ends of the fixing part 11, limiting parts 12 are symmetrically arranged. A positioning groove is formed between the two limiting parts 12 for limiting the camera during installation; at the upper corners of both ends of the rear side of the fixing part 11, suction cups 13 are respectively provided for adsorbing on the front windshield to fix the whole auxiliary device; the bottom edges of the two limiting parts 12 are both horizontally arranged and on the same straight line, and the bottom edges can be attached to the connecting part between the instrument panel of the vehicle cab and the front windshield; the inner side edges of the limiting parts 12 are arranged at a 90° angle to the bottom edges, and the inner side edges are used for limiting the camera during installation to make its rolling angle 0°; on the opposite sides of the inner side edges of the two limiting parts 12, slide rails 14 are arranged. The slide rails 14 can be made of metal or plastic. A limiting ruler 15 is slidably connected between the two slide rails 14 and can slide up and down and be fixed along the slide rails 14. When installing the camera, the top surface of the camera can be limited to ensure the accuracy of vertical positioning.

[0104] Please refer to Figure 6 、 Figure 7 and Fig.10 As shown, this embodiment also provides an in-vehicle camera assembly method. Based on the above-mentioned in-vehicle camera assembly auxiliary device, when it is used for the first time, the verification steps of the auxiliary device are as in Embodiment 1; after the verification is passed, using the auxiliary device to install the camera includes the following steps:

[0105] Insert the camera wire harness into the camera;

[0106] Place the bottom edge of the limiting part 12 of the limiting device 1 on the connecting part between the instrument panel and the front windshield;

[0107] Turn on the laser 21 and adjust the limiting device 1 horizontally left and right to make the laser line 211 pass through the triangular positioning mark 31 of the installation black area 3 of the front windshield;

[0108] Adsorb the suction cup 13 of the fixing part 11 on the front windshield;

[0109] Slide the limiting ruler 15 until the bottom edge of the limiting ruler 15 coincides with the upper edge of the triangular positioning mark 31 and then fix it;

[0110] Tear off the sticker on the camera, make the top surface of the camera contact with the bottom edge of the limiting ruler 15, and paste it from top to bottom through the limiting groove of the limiting device 1;

[0111] After pasting, remove the auxiliary device;

[0112] Re-engage the two limiting parts 12 of the auxiliary tooling with the limiting parts on both sides of the camera, and slide from top to bottom until the bottom edge of the limiting part 12 contacts the instrument panel;

[0113] Observe whether the bubble of the level gauge 22 on the positioning device 2 is on the Z axis, that is, horizontally centered;

[0114] If yes, the camera is installed within tolerance and the installation is complete;

[0115] If not, the camera assembly is out of tolerance. Check the camera and reassemble it.

[0116] The present embodiment uses a limit ruler 15, which eliminates the need for positioning and installing by aligning the V-shaped positioning groove with the positioning mark 31, which is more convenient and improves accuracy; the limit ruler 15 can slide up and down, adapting to the different requirements of installation height for different car models or camera models, and has good versatility; the level 22 used in the present embodiment is a long bubble level, which is easier to observe.

[0117] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A vehicle-mounted camera assembly auxiliary device, characterized in that: It includes a limiting device (1) and a positioning device (2). The limiting device (1) includes a fixing part (11) which is horizontally arranged. At the lower sides of both ends of the fixing part (11), two limiting parts (12) are symmetrically arranged. A limiting groove is formed between the two limiting parts (12). The positioning device (2) is fixedly connected to the middle of the front end face of the fixing part (11).

2. The vehicle-mounted camera assembly auxiliary device according to claim 1, characterized in that: The whole limiting device (1) is in the shape of a "冂"-shaped plate structure. At the upper corners of both ends of the rear end face of the fixing part (11), suction cups (13) are respectively provided. The bottom edges of the two limiting parts (12) are both horizontal and collinear. The inner side edges of the limiting parts (12) are vertically arranged with the bottom edges.

3. The vehicle-mounted camera assembly auxiliary device according to claim 2, characterized in that: On the lower surface of the positioning device (2), a laser (21) is provided. The laser line (211) emitted by the laser (21) is parallel to the inner side edge of the limiting part (12) and coincides with the symmetry axis of the two limiting parts (12). On the front end face of the positioning device (2), a spirit level (22) is provided.

4. The vehicle-mounted camera assembly auxiliary device according to claim 3, characterized in that: On the inner side edges of the two limiting parts (12), slide rails (14) are oppositely arranged. A limiting ruler (15) is slidably connected between the two slide rails (14).

5. A method for assembling a vehicle-mounted camera, characterized in that: Based on the vehicle-mounted camera assembly auxiliary device as described in claim 4, it includes the following steps: Calibrate the vehicle-mounted camera assembly auxiliary device before the first use; Adjust and fix the vehicle-mounted camera assembly auxiliary device; Install the camera on the installation black area (3) of the front windshield; Verify whether the camera is installed in place.

6. The vehicle-mounted camera assembly method according to claim 5, characterized in that: The calibration of the vehicle-mounted camera assembly auxiliary device before the first use includes the following steps: Place the bottom edge of the limiting part (12) of the limiting device (1) in contact with the connection part between the instrument panel and the front windshield; Turn on the laser (21) and adjust the limiting device (1) horizontally left and right to make the laser line (211) pass through the center of the positioning mark (31) of the front windshield installation black area (3); Adsorb the suction cup (13) of the fixing part (11) on the front windshield; Judge whether the inner side edge of the limiting part (12) coincides with the left and right side edges of the approximately rectangular installation area of the installation black area (3): If not, the calibration fails and the auxiliary device needs to be adjusted or remade; If so, observe whether the bubble of the spirit level (22) on the positioning device (2) is horizontally centered; If not, the calibration fails and the auxiliary device needs to be adjusted or remade; If so, the calibration passes; The verification of whether the camera is installed in place includes the following steps: Re-connect the two limiting parts (12) of the auxiliary tooling with the two sides of the camera in contact and slide from top to bottom until the bottom edge of the limiting part (12) touches the instrument panel; Observe whether the bubble of the spirit level (22) on the positioning device (2) is horizontally centered; If so, the camera assembly has no out-of-tolerance and the installation is completed; If not, the camera assembly is out of tolerance, check the camera and re-assemble it.

7. The vehicle-mounted camera assembly method according to claim 5, characterized in that: The adjustment and fixation of the vehicle-mounted camera assembly auxiliary device includes: Place the bottom edge of the limiting part (12) of the limiting device (1) in contact with the connection part between the instrument panel and the front windshield; Turn on the laser (21) and adjust the limit device (1) in parallel to the left and right sides so that the laser line (211) passes through the center of the positioning mark (31) of the front windshield installation black area (3); The suction cup (13) of the fixing portion (11) of the limiting device (1) is adsorbed onto the front windshield.

8. The vehicle-mounted camera assembly method according to claim 7, characterized in that: The step of installing the camera on the installation black area (3) of the front windshield comprises: Plug the camera wiring harness into the camera; Align the positioning groove on the top surface of the camera with the positioning mark (31), and stick it to the installation black area (3) through the limiting groove of the limiting device (1); After pasting, remove the auxiliary device.

9. The vehicle-mounted camera assembly method according to claim 7, characterized in that: The adjusting and fixing vehicle-mounted camera assembly auxiliary device also includes a sliding limit ruler (15), which is fixed after the bottom edge of the limit ruler (15) overlaps with the upper edge of the triangular positioning mark (31).

10. The vehicle-mounted camera assembly method according to claim 9, characterized in that: The step of installing the camera on the installation black area (3) of the front windshield comprises: Plug the camera wiring harness into the camera; The top surface of the camera is brought into contact with the bottom edge of the limit ruler (15), and is pasted onto the installation black area (3) through the limit groove of the limit device (1); After pasting, remove the auxiliary device.

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