A 3D imaging detection system based on moire and line laser fusion

Abstract

The utility model discloses a kind of 3D imaging detection systems based on moire and line laser fusion, belong to industrial automatic detection technical field.The system includes moire projection module, line laser scanning module and image acquisition module integrated on same optical axis.The utility model is through preset material height information, and two kinds of imaging mode are intelligently switched: using moire for high-precision imaging to low element, using line laser for large range imaging to tall element.The system effectively solves the technical problem that existing single 3D imaging technology cannot consider detection accuracy and height range under high-speed production rhythm, realizes the efficient, full-coverage 3D detection to all materials on complex workpieces such as PCB board.

Description

Technical Field

[0001] This utility model belongs to the field of industrial automatic inspection technology, specifically relating to a 3D imaging inspection system based on the fusion of moiré patterns and line lasers. Background Technology

[0002] In the industrial manufacturing sector, especially in industries such as automotive electronics and consumer electronics, the requirements for the three-dimensional shape inspection of product components are becoming increasingly stringent. Currently, the mainstream 3D imaging technologies include moiré projection and line laser scanning.

[0003] Moiré pattern 3D imaging technology has advantages such as non-contact operation, high precision, and fast imaging speed, making it suitable for rapid inspection of small-sized, low-height materials, such as the soldering quality inspection of components on PCBAs. However, this technology has limitations in height measurement range and is difficult to handle materials with large height differences.

[0004] Line laser 3D imaging technology has a large height range and is suitable for detecting materials with high height, such as the flatness of mobile phones and tall components on PCBs. However, its detection speed is relatively slow and it is difficult to meet the needs of high-speed production.

[0005] In existing technologies, the two imaging technologies are typically used independently, making it impossible to intelligently switch imaging modes based on material height within the same device. This results in difficulties in balancing detection accuracy and efficiency in highly complex and fast-paced production environments. Therefore, there is an urgent need for a 3D imaging inspection system that can integrate two imaging technologies and possesses high adaptability. Utility Model Content

[0006] This invention aims to provide a 3D imaging inspection system based on the fusion of moiré patterns and line lasers, solving the technical problem that existing single 3D imaging technologies cannot simultaneously achieve high-precision inspection of small-sized components and large-range inspection of large-height components under high-speed production cycles.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A 3D imaging detection system based on the fusion of moiré patterns and line lasers, comprising: Moiré projection module for high-precision 3D imaging of low-height materials; Line laser scanning module, used for 3D imaging of materials at high heights; The image acquisition module is used to acquire image data of the materials. The control module is used to control the switching between the moiré projection module and the line laser scanning module according to the preset material height information; The moiré projection module, line laser scanning module, and image acquisition module are mounted on the same optical axis.

[0008] Furthermore, the control module has a preset threshold. When the material height is lower than the preset threshold, the moiré projection module is activated; when the material height is higher than the preset threshold, the line laser scanning module is activated.

[0009] Furthermore, the aforementioned 3D imaging inspection system based on the fusion of moiré patterns and line lasers also includes a motion platform and a data processing unit. The motion platform is used to carry and move the material to be inspected; the data processing unit is used to perform 3D reconstruction and defect analysis on the acquired images.

[0010] Compared with existing technologies, the advantages of this invention are as follows: By integrating two mainstream 3D imaging technologies into one unit and intelligently switching according to material height, this invention effectively solves the problem of balancing high precision and large processing range in industries such as automotive electronics. The system has a compact structure, ensuring high production speed while eliminating the need to purchase two separate sets of equipment, significantly saving costs for customers. Attached Figure Description

[0011] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the structure of a 3D imaging detection system based on the fusion of moiré patterns and line lasers according to this utility model. Detailed Implementation

[0012] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0013] The present invention will be further described in detail below with reference to the embodiments.

[0014] like Figure 1 As shown, the 3D imaging detection system based on the fusion of moiré patterns and line lasers of this utility model includes: Moiré projection module 1 is used for high-precision 3D imaging of low-height material 6; Line laser scanning module 2 is used for 3D imaging of high-altitude material 7; Image acquisition module 3 is used to acquire image data of materials, and the image acquisition module 3 is a camera; The control module 4 is used to control the switching between the moiré projection module 1 and the line laser scanning module 2 according to the preset material height information; The moiré projection module 1, the line laser scanning module 2, and the image acquisition module 3 are mounted on the same optical axis 5.

[0015] The control module 4 has a preset threshold. When the material height is lower than the preset threshold, the moiré projection module 1 is activated; when the material height is higher than the preset threshold, the line laser scanning module 2 is activated. The control module 4 is a PCB board.

[0016] The aforementioned 3D imaging inspection system based on the fusion of moiré patterns and line lasers further includes a motion platform and a data processing unit. The motion platform is used to carry and move the material to be inspected; the data processing unit is used to perform 3D reconstruction and defect analysis on the acquired images.

[0017] Before testing, the height information of each component on the PCB board is preset in the control system based on the PCB board data, and a height threshold (e.g., 2mm) is set. Simultaneously, optical calibration of both imaging modules is completed. The motion platform moves the area of ​​the PCB board to be tested below the camera. Based on the preset height information, the PCB board automatically selects the imaging mode: if the current component height is lower than or equal to the threshold, the moiré projection module 1 is activated for fast, high-precision 3D imaging; if the current component height is higher than the threshold, the line laser scanning module 2 is activated for large-range 3D scanning.

[0018] Regardless of the mode used, the acquired 3D data is sent to the data processing unit for comparison with the standard model, thereby detecting defects such as component offset, floating height, missing parts, and insufficient solder or solder bridging at solder joints, achieving 100% detection of product defects.

[0019] It should be noted that, in this document, terms such as “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0020] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A 3D imaging detection system based on moire and line laser fusion, characterized in that, include: Moiré projection module for high-precision 3D imaging of low-height materials; Line laser scanning module, used for 3D imaging of materials at high heights; The image acquisition module is used to acquire image data of the materials. The control module is used to control the switching between the moiré projection module and the line laser scanning module according to the preset material height information; The moiré projection module, line laser scanning module, and image acquisition module are mounted on the same optical axis.

2. The 3D imaging detection system based on moiré pattern and line laser fusion according to claim 1, characterized in that, The control module has a preset threshold. When the material height is lower than the preset threshold, the moiré projection module is activated; when the material height is higher than the preset threshold, the line laser scanning module is activated.

3. The 3D imaging detection system based on moiré pattern and line laser fusion according to claim 2, characterized in that, It also includes a motion platform and a data processing unit. The motion platform is used to carry and move the material to be inspected; the data processing unit is used to perform 3D reconstruction and defect analysis on the acquired images.

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