Optical detection device for car roof cover

Abstract

The utility model discloses an optical detection device for a car roof cover, and belongs to the technical field of appearance defect detection. The optical detection device is used for acquiring an appearance image of the roof cover for a subsequent image processing system to carry out image analysis, and the optical detection device comprises M image collectors used for acquiring an upper surface image of the roof cover; a support is further included. A regulation and control device for driving the M image collectors to move up and down is mounted on the bracket; m is a natural number greater than 0; the light source module is used for providing supplementary illumination for a photographing area of the image collector; wherein the light source module is located between the image collector and the car roof cover. The device has the advantages that the height-adjustable image collector is arranged, the position of the collector can be adjusted according to the heights or requirements of different car roof covers, and the adaptability and flexibility of the device are improved; a light source module is arranged below the image collector to provide a stable and uniform illumination environment, and the influence of shadow and reflection on image quality is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of appearance defect detection, and in particular relates to an optical detection device for a vehicle roof cover. Background Art

[0002] As an important part of the car, the quality of the roof cover directly affects the overall performance of the car and the safety of the user. Through defect detection, it can be ensured that the roof cover has no quality problems such as cracks, potholes, scratches, rust, etc. during the production process, ensuring the overall quality of the vehicle. The defects of the roof cover may also gradually worsen during use, leading to greater safety hazards. For example, cracks may expand and rust may intensify, all of which may threaten the structural integrity and safety of the vehicle. And if the defects of the roof cover are not discovered and repaired in time, more repairs and replacements may be required during the subsequent use, which will increase the maintenance cost of the vehicle. By discovering and repairing these defects early and in time, potential risks and accidents can be prevented, and problems can be repaired, thereby reducing maintenance costs.

[0003] Existing technologies mostly collect images by combining a truss and a linear array camera. However, this design will increase material consumption and construction costs. In addition, for obvious pits and deformations on raised edges, the combination of a truss and a linear array camera cannot detect relevant image information, thereby affecting the quality inspection efficiency of the roof cover.

[0004] Therefore, based on the above situation, it is urgent to propose a new design to solve the above problems. Utility Model Content

[0005] The utility model aims to meet practical needs and provide a vehicle roof cover optical detection device, which can be used to detect defects such as pits with obvious raised edges and small areas, deformation, etc., thereby improving detection efficiency and accuracy.

[0006] In order to achieve the above-mentioned purpose of the utility model, the first purpose of the utility model is to provide an optical detection device for a roof cover, which is used to obtain the appearance image of the roof cover for subsequent image processing system to perform image analysis. The optical detection device includes M image collectors for obtaining the upper surface image of the roof cover; it also includes a bracket; a control device for driving the M image collectors to move up and down is installed on the bracket; M is a natural number greater than 0; a light source module provides fill light illumination for the photographing area of ​​the image collector; wherein: the light source module is located between the image collector and the roof cover.

[0007] In the above-mentioned scheme of the optical detection device for the vehicle roof cover, the control device includes: a crossbeam fixed on the bracket; a screw vertically installed on the crossbeam; a motor that drives the screw to move; and a transverse bracket installed on the screw; wherein M image collectors are fixed on the crossbeam.

[0008] In the above-mentioned solution of the vehicle roof optical inspection device, the light source module includes: two mounting brackets parallel to each other; a mounting groove located between the two mounting brackets and rotatably connected to the mounting brackets; and a light source is arranged in the mounting groove.

[0009] In the above-mentioned scheme of the optical detection device for the vehicle roof cover, the transverse bracket is provided with: a vertical track matching the lead screw; M connecting members fixed on the transverse bracket; M acquisition boxes respectively fixed to the connecting members; wherein: the vertical track is fixed to the back side of the transverse bracket, the connecting member is fixed to the front side of the transverse bracket, and each acquisition box is provided with an image acquisition device.

[0010] In the above-mentioned solution of the optical inspection device for the vehicle roof, M is 2, and an image collector is fixed to each end of the crossbeam.

[0011] In the above-mentioned solution of the vehicle roof optical detection device, the distance between the two image collectors is 400 mm to 600 mm.

[0012] In the scheme of the above-mentioned vehicle roof optical detection device, the distance between the image collector and the vehicle roof is 350mm-550mm, the distance between the light source and the vehicle roof is 40mm-80mm; the length of the mounting groove is 1100mm-1300mm. In the scheme of the above-mentioned vehicle roof optical detection device, the angle between the light beam emitted by the light source and the vertical direction is 20°-40°.

[0013] In the above-mentioned solution of the vehicle roof cover optical detection device, the image collector is a three-dimensional camera.

[0014] The advantages and positive effects of this application are:

[0015] (1) The present application sets up a height-adjustable image collector, which can adapt to the height of different roof covers or adjust the position of the collector as needed, thereby increasing the adaptability and flexibility of the device, and images at different heights can minimize the error caused by light influence;

[0016] (2) A light source module is set below the image collector to provide a stable and uniform lighting environment to reduce the impact of shadows and reflections on image quality;

[0017] (3) The present application has a simple structure, and by arranging image collectors side by side, the image collection area can be increased, thereby improving collection efficiency;

[0018] (4) The angle of the light source is adjustable, further ensuring the uniformity and accuracy of the lighting;

[0019] (5) The whole system adopts automatic control to realize the automatic lifting and lowering of the acquisition module, thus improving the detection efficiency;

[0020] (6) It has been verified that the present application can detect defects such as pits with obvious raised edges, small areas, and deformations. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. 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 paying any creative work.

[0022] Figure 1 A schematic diagram showing the structure of a vehicle roof optical detection device provided by an embodiment of the utility model is shown;

[0023] Figure 2 A partial enlarged view of A provided in an embodiment of the utility model is shown;

[0024] Figure 3 A schematic structural diagram of a transverse bracket provided in an embodiment of the utility model is shown.

[0025] In the figure, 1, image acquisition device; 2, crossbeam; 3, motor; 4, lead screw; 5, horizontal bracket; 51, vertical track; 52, connecting piece; 53, acquisition box; 6, mounting bracket; 7, mounting slot. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0029] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] See also Figures 1 to 3 ;

[0031] First embodiment

[0032] The utility model provides a vehicle roof optical detection device, which can meet the image acquisition requirements of vehicle roofs of different sizes and can be adapted to the detection of vehicle roofs of various specifications.

[0033] The present application is used to obtain the appearance image of the roof cover for subsequent image processing system to perform image analysis. The optical detection device includes M image collectors for obtaining the surface image of the roof cover; Figure 1 As shown, the optical detection device is fixed on the bracket. Figure 1 The bracket is not shown, only the optical detection device is shown. A transverse track can also be set under the bracket. The optical detection device can achieve lateral displacement through the transverse track to complete image acquisition of the entire upper surface of the roof cover. The detection device specifically includes:

[0034] A control device for driving M image collectors 1 to move up and down; M is a natural number greater than 0;

[0035] Specifically, the control device includes: a beam 2 fixed on the bracket; a screw 4 vertically installed on the beam 2; a motor 3 that drives the screw 4 to move; and a horizontal bracket 5 installed on the screw 4; wherein M image collectors 1 are fixed on the beam 2.

[0036] The horizontal bracket 5 is provided with: a vertical track 51 matching with the lead screw 4; M connectors 52 fixed on the horizontal bracket 5; M acquisition boxes 53 respectively fixed to the connectors 51; wherein the vertical track 51 is fixed to the back of the horizontal bracket 5, the connector 52 is fixed to the front of the horizontal bracket 5, and each acquisition box 53 is provided with an image collector 1. The image collector 1 is detachably installed in the acquisition box 53, and the connector 52 here can further increase the stability of image acquisition; the connector 51 can be a single angle steel or multiple angle steels welded together, which is not limited in this application.

[0037] Compared with a single image collector, multiple image collectors 1 increase the area of ​​image collection, thereby improving the efficiency of image collection; illustratively, the image collector 1 can be a three-dimensional camera, and the multiple three-dimensional cameras directly collect three-dimensional photos of multiple areas respectively, or the image collector 1 is a line scan camera. When multiple line scan cameras are used to collect images of the same area from different angles, stereoscopic vision or structured light and other technologies can be used in combination with image processing algorithms to reconstruct the three-dimensional information of the target.

[0038] The motor 3 drives the screw 4 to rotate, and the transverse bracket 5 and the screw 4 are screwed together, so that the transverse bracket 5 drives the image collector 1 to move up and down on the screw 4, so that the captured images of the roof cover at different heights can be obtained, which increases the adaptability and flexibility of the device; and the image information of the roof cover is collected under light sources at different heights, which ensures the accuracy of the picture information and reduces the error; by processing images at different heights, accurate position information of pits and deformations with obvious raised edges can be obtained.

[0039] A light source module that provides fill light illumination for the photographing area of ​​the image collector 1;

[0040] The light source module comprises: two mounting brackets 6 which are parallel to each other; a mounting groove 7 which is located between the two mounting brackets 6 and is rotatably connected to the mounting brackets 6; and a light source is arranged in the mounting groove 7.

[0041] Here, the mounting slot 7 can be rotated to obtain a suitable optical environment, such as Figure 2 As shown, in the present application, a connecting rod connection is used to achieve rotation. In addition, bearing connection, pin connection and other methods can also be used, subject to the technical solution of the present application, which is not limited here.

[0042] The mounting slot 7 can be rotated to the most suitable ambient light situation, so that the image collector 1 can accurately and clearly capture the image of the roof cover, further ensuring the uniformity and accuracy of the lighting. Therefore, a locking device can be set according to actual conditions to prevent the mounting slot 7 from rotating and affecting the defect detection results.

[0043] It should be noted that a good lighting environment can obtain high-quality captured images, and high-quality captured images can reduce the processing difficulty of the subsequent image processing system (such as AI image recognition software) and obtain more accurate AI image visual analysis results. Since the invention point of this application is not in the AI ​​image vision part, the existing AI image visual analysis software can be used, and this application will not go into details.

[0044] The motor 3 can be precisely controlled by a PLC controller or the like to achieve automatic adjustment of the height of the image collector 1 .

[0045] In addition, the length of the mounting groove 7 should be greater than the length of the roof cover to ensure that the entire upper surface of the roof cover is in a stable optical environment.

[0046] Second embodiment

[0047] Based on the content of the above embodiments, in this application, the length range of the roof cover is set to 1000mm to 1100mm for example:

[0048] If M is 2, an image collector 1 is fixed at each end of the crossbeam, and the distance between the two image collectors can be 400mm to 600mm, such as 400mm, 500mm or 600mm; the distance between the image collector and the roof cover is 350mm to 550mm, such as 350mm, 450mm or 550mm; the length of the mounting groove 7 is 1100mm to 1300mm, such as 1100mm, 1200mm or 1300mm, and a linear array light source can be used here to ensure uniform brightness in the irradiated area, which is more suitable for the detection of metal objects with uneven surfaces and reflective surfaces. The angle between the light beam emitted by the light source and the vertical direction is 20° to 40°; specifically, such as 20°, 30° or 40°. It has been verified that the best lighting effect can be achieved when 30° is used, and the distance between the light source and the roof cover is 40mm to 80mm, such as 40mm, 60mm or 80mm.

[0049] The above data ranges are all examples. In practice, the specific data values ​​should be designed according to the type and model of the image collector, the image processing algorithm, etc. In a specific embodiment, the model of the light source is LSS1322-W; when the image collector is a line array camera, the model of the line array camera can be LA-GM-08K08A.

[0050] After experimental verification, based on the above parameter settings, convex and concave packages with a size of 1.5mm*1.5mm and a depth of more than 0.3mm can be collected and identified.

[0051] Third embodiment

[0052] Based on the foregoing, this application adopts a low-angle light source and provides a stable optical environment, reducing the impact of shadows and reflections on image quality, adjusting the shooting height of the camera, and performing shooting and detection at high and low altitudes respectively, thereby minimizing the errors caused by light influence, and transmitting the collected image information to the terminal for identification, and finally obtaining the result of whether the roof cover is qualified.

[0053] Based on the above technical solution, it can be used to detect defects such as pits with obvious raised edges, small areas, deformations, etc., which improves the detection efficiency and accuracy.

[0054] The above is only a preferred embodiment of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A vehicle roof optical inspection device, used to obtain an appearance image of the vehicle roof for subsequent image processing system to perform image analysis, the optical inspection device comprising M image collectors for obtaining an image of the upper surface of the vehicle roof; characterized in that: Also includes a bracket; mounted on the bracket: A control device for driving M image collectors (1) to move up and down; M is a natural number greater than 0; A light source module for providing fill light illumination to the photographing area of ​​the image collector (1); wherein: The light source module is located between the image collector and the roof cover.

2. The vehicle roof optical inspection device according to claim 1, characterized in that: The control device comprises: A crossbeam (2) fixed on the bracket; A lead screw (4) vertically mounted on the crossbeam (2); a motor (3) for driving the lead screw (4); and A transverse support (5) is mounted on the lead screw (4); wherein M image collectors (1) are fixed on the crossbeam (2).

3. The vehicle roof optical inspection device according to claim 1, characterized in that: The light source module comprises: Two mounting brackets (6) parallel to each other; A mounting groove (7) is located between two mounting brackets (6) and is rotatably connected to the mounting brackets (6); a light source is arranged in the mounting groove (7).

4. The vehicle roof optical inspection device according to claim 2, characterized in that: The transverse support (5) is provided with: A vertical track (51) matching the lead screw (4); M connecting members (52) fixed on the transverse support (5); M collection boxes (53) respectively fixed to the connecting members (52); wherein: The vertical rail (51) is fixed on the back side of the transverse bracket (5), the connecting piece (52) is fixed on the front side of the transverse bracket (5), and each acquisition box (53) is provided with an image acquisition device (1).

5. The vehicle roof optical inspection device according to claim 2, characterized in that: The value of M is 2, and an image collector (1) is respectively fixed at two ends of the crossbeam (2).

6. The vehicle roof optical inspection device according to claim 5, characterized in that: The distance between the two image collectors (1) is 400 mm to 600 mm.

7. The vehicle roof optical inspection device according to claim 3, characterized in that: The distance between the image collector (1) and the roof cover is 350 mm to 550 mm, the distance between the light source and the roof cover is 40 mm to 80 mm; and the length of the mounting groove (7) is 1100 mm to 1300 mm.

8. The vehicle roof optical inspection device according to claim 3, characterized in that: The angle between the light beam emitted by the light source and the vertical direction is 20° to 40°.

9. The vehicle roof optical inspection device according to claim 3, characterized in that: The image collector is a three-dimensional camera.

Images