Rivet assembly detection device

Abstract

The utility model relates to the technical field of rivet assembly, and discloses a rivet assembly detection device which comprises a supporting frame, a motion control assembly, a detection assembly and a data processing unit are installed on the supporting frame, the detection assembly comprises an installation frame, and a visual detection module and a laser ranging module are installed on the installation frame. The visual detection module is used for obtaining image data of a rivet area and identifying the position, the number and the contour form of the rivet, and the laser ranging module is used for conducting three-dimensional scanning on the peripheral area of the rivet and generating height point cloud data to calculate the segment difference. Through cooperation of the vision module and the laser module, the rivet detection precision and efficiency are remarkably improved, the vision detection module accurately positions rivets and recognizes abnormal forms, the laser ranging module synchronously scans and generates three-dimensional point clouds, segment difference high-precision measurement is achieved, errors caused by traditional manual or single sensor detection are avoided, and the detection accuracy is improved. And the non-contact design effectively prevents the workpiece from being damaged.

Description

A rivet assembly inspection device Technical Field

[0001] This utility model relates to the field of rivet assembly technology, and more specifically to a rivet assembly detection device. Background Technology

[0002] Traditional rivet inspection mainly relies on manual visual inspection or a single sensor (such as a contact measuring instrument), which is inefficient, has unstable accuracy, and cannot simultaneously detect rivet shape and step difference.

[0003] In addition, existing visual inspection technologies are sensitive to lighting conditions and have difficulty accurately identifying rivet edges or minor deformations; when used alone, laser ranging technology cannot be associated with the planar position information of the rivet, resulting in the separation of step measurement and rivet positioning.

[0004] During the riveting process, step differences (such as inconsistent riveting surface heights) can easily cause structural strength problems in products, but traditional methods are difficult to achieve rapid, non-contact comprehensive testing. Summary of the Invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a rivet assembly detection device to solve the problems existing in the background art.

[0006] This utility model provides the following technical solution: a rivet assembly detection device, including a support frame, on which a motion control component, a detection component and a data processing unit are installed.

[0007] The motion control component is used to drive the detection component to move along a preset path.

[0008] The detection component includes a mounting frame on which a vision detection module and a laser ranging module are mounted. The vision detection module is used to acquire image data of the rivet area and identify the position, number, and outline of the rivet. The laser ranging module is used to perform three-dimensional scanning of the area surrounding the rivet and generate height point cloud data to calculate the step difference.

[0009] The data processing unit is used to fuse visual positioning data and laser height data, and to associate rivet position and step information through coordinate system transformation, and output comprehensive detection results.

[0010] Preferably, the visual inspection module includes an industrial camera and a ring light source, the ring light source being arranged around the industrial camera, and the ring light source having a built-in multi-level brightness adjustment circuit and working with an image processing algorithm to achieve adaptive illumination compensation.

[0011] Preferably, the laser ranging module is a laser sensor, and the scanning path of the laser sensor is guided by the rivet position identified by the vision detection module.

[0012] Preferably, the brightness adjustment of the ring light source is controlled by the data processing unit.

[0013] Preferably, the motion control component is an XYZ three-axis slide table driven by a servo motor. The positioning accuracy of the XYZ three-axis slide table is no greater than 0.02mm. The XYZ three-axis slide table is used to synchronously adjust the measurement positions of the vision detection module and the laser ranging module.

[0014] The technical effects and advantages of this utility model are as follows:

[0015] This invention significantly improves the accuracy and efficiency of rivet detection by using a dual-module approach of vision and laser. The vision detection module accurately locates the rivet and identifies abnormal shapes, while the laser ranging module simultaneously scans and generates a three-dimensional point cloud, enabling high-precision measurement of step differences. This avoids the errors of traditional manual or single-sensor detection, and the non-contact design effectively prevents workpiece damage. Attached Figure Description

[0016] Figure 1 is a schematic diagram of the overall structure of this utility model.

[0017] Figure 2 is a schematic diagram of the internal structure of the support frame of this utility model.

[0018] Figure 3 is a schematic diagram of the detection component structure of this utility model.

[0019] Figure 4 is a schematic diagram of the detection component structure of this utility model.

[0020] The attached figures are labeled as follows: 1. Support frame; 2. Motion control component; 3. Detection component; 31. Mounting bracket; 32. Vision inspection module; 321. Industrial camera; 322. Ring light source; 33. Laser ranging module. Detailed Implementation

[0021] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. In addition, the forms of the various structures described in the following embodiments are merely illustrative. The rivet assembly detection device involved in this utility model is not limited to the structures described in the following embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0022] This utility model provides a rivet assembly detection device, including a support frame 1, on which a motion control component 2, a detection component 3 and a data processing unit are installed.

[0023] The motion control component 2 is used to drive the detection component 3 to move along a preset path.

[0024] The detection component 3 includes a mounting frame 31, on which a vision detection module 32 and a laser ranging module 33 are mounted. The vision detection module 32 is used to acquire image data of the rivet area and identify the position, number and outline of the rivet. The laser ranging module 33 is used to perform three-dimensional scanning of the area around the rivet and generate height point cloud data to calculate the step difference.

[0025] The data processing unit is used to fuse visual positioning data and laser height data, and to correlate rivet position and step information through coordinate system transformation, and output comprehensive detection results.

[0026] The data processing unit is configured to perform the following operations:

[0027] Extract rivet outlines from visual images to determine abnormal shapes or positional offsets;

[0028] The laser-scanned 3D point cloud data is compared with a preset height threshold to calculate the step difference exceeding the limit.

[0029] By integrating visual and laser data, a comprehensive judgment result on the rivet assembly quality is output and a sorting signal is triggered.

[0030] Furthermore, the vision inspection module 32 includes an industrial camera 321 and a ring light source 322. The ring light source 322 is arranged around the industrial camera 321. The ring light source 322 has a built-in multi-level brightness adjustment circuit and works with an image processing algorithm to achieve adaptive illumination compensation.

[0031] Furthermore, the laser ranging module 33 is a laser sensor, and the scanning path of the laser sensor is guided by the rivet position identified by the vision detection module 32 to directionally measure the step difference of the area surrounding the rivet.

[0032] Furthermore, the brightness adjustment of the ring light source 322 is controlled by the data processing unit, which dynamically adjusts the illumination intensity according to the real-time image grayscale value to optimize the rivet edge detection accuracy.

[0033] Furthermore, the motion control component 2 is an XYZ three-axis slide table driven by a servo motor. The positioning accuracy of the XYZ three-axis slide table is no greater than 0.02mm. The XYZ three-axis slide table is used to synchronously adjust the measurement positions of the vision inspection module 32 and the laser ranging module 33.

[0034] The working principle of this utility model:

[0035] The rivet to be inspected is moved to the inspection table of the support frame. The industrial camera 321 of the vision inspection module 32 captures a global image of the rivet area under the illumination of the ring light source 322. The ring light source 322 dynamically adjusts the brightness according to the gray value of the real-time image to optimize the contrast of the rivet edge.

[0036] Image processing algorithms extract the rivet outline, calculate its center coordinates, quantity, and morphological parameters (such as diameter and roundness), and compare it with the preset design drawings to determine whether there is any offset, deformation, or missing parts. The identified rivet position information is marked and stored, and path planning instructions for subsequent laser scanning are generated.

[0037] The laser sensor performs a non-contact scan of the rivet joint surface and surrounding area along a preset path (such as a spiral or grid path around the rivet) to generate high-density three-dimensional point cloud data.

[0038] The data processing unit filters and fits the point cloud data, extracts the height difference (segment difference) between the rivet joint surface and the adjacent area, and compares it with a preset threshold (such as ±0.1mm) to determine whether the segment difference exceeds the standard.

[0039] The calibration parameters are used to convert the two-dimensional image coordinate system of the vision module to the three-dimensional measurement coordinate system of the laser module to ensure that the rivet position and the step difference data are spatially aligned. If the rivet position deviation exceeds ±0.05mm, the shape is abnormal (such as deformation or missing parts), or the step difference exceeds the limit, it is judged as unqualified (NG). If all parameters are within the threshold range, it is judged as qualified (OK). The data processing unit transmits the detection result (OK / NG) and the specific out-of-tolerance parameters to the production line control system through the interface module, triggering the sorting mechanism to reject the unqualified workpiece.

[0040] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0041] Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0042] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A rivet assembly inspection device, comprising a support frame (1), characterized in that, The support frame (1) is equipped with a motion control component (2), a detection component (3), and a data processing unit. The motion control component (2) is used to drive the detection component (3) to move along a preset path. The detection component (3) includes a mounting frame (31), on which a visual detection module (32) and a laser ranging module (33) are installed. The visual detection module (32) is used to acquire image data of the rivet area and identify the position, number, and outline of the rivet. The laser ranging module (33) is used to perform three-dimensional scanning of the area surrounding the rivet and generate height point cloud data to calculate the step difference. The data processing unit is used to fuse visual positioning data and laser height data, and to associate the rivet position and step difference information through coordinate system transformation and output a comprehensive detection result.

2. The rivet assembly inspection device according to claim 1, characterized in that, The visual inspection module (32) includes an industrial camera (321) and a ring light source (322). The ring light source (322) is arranged around the industrial camera (321). The ring light source (322) has a built-in multi-level brightness adjustment circuit and works with an image processing algorithm to achieve adaptive illumination compensation.

3. The rivet assembly inspection device according to claim 1, characterized in that, The laser ranging module (33) is a laser sensor, and the scanning path of the laser sensor is guided by the rivet position identified by the vision detection module (32).

4. The rivet assembly inspection device according to claim 2, characterized in that, The brightness adjustment of the ring light source (322) is controlled by the data processing unit.

5. The rivet assembly inspection device according to claim 1, characterized in that, The motion control component (2) is an XYZ three-axis slide table driven by a servo motor. The positioning accuracy of the XYZ three-axis slide table is no more than 0.02mm. The XYZ three-axis slide table is used to synchronously adjust the measurement positions of the vision detection module (32) and the laser ranging module (33).

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