A laser fusion calibration method based on 3D model
A calibration method and laser technology, applied in the field of vision, can solve the problems of spending a lot of energy on designing calibration blocks, high production costs of calibration blocks, and complex 3D measurement scenes, so as to save time for adjusting parameters, reduce time and processing cycles, and reduce production cost effect
Active Publication Date: 2020-08-14
苏州天准软件有限公司 +1
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Problems solved by technology
[0003] 1. The 3D measurement scene is relatively complicated, and it takes a lot of effort to design the calibration block;
[0004] 2. It takes effort to adjust the laser to be compatible with the scanning workpiece and the calibration block;
[0005] 3. The production cost of the calibration block is relatively high;
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[0026] Such as Figure 1 to Figure 5 As shown, the present invention includes the following calibration steps:
[0027] (1), install the laser sensor on the movement mechanism, and make the laser direction of the laser sensor perpendicular to the movement direction, the position of the measurement product is fixed, and the measurement product is fixedly placed on the carrying fixture 1. During the movement, the laser The sensor triggers and collects data to obtain grid-like data; wherein, every time the laser sensor moves 0.1mm, the laser is automatically triggered once to collect data once, and the laser sensor can collect a linear outline each time;
[0028] (2) According to the trigger distance of the moving direction and the laser point interval, the grid data is supplemented to obtain 3D point cloud data. Specifically, the trigger distance and the laser point interval can be set according to the actual measurement of the product;
[0029] (3) Align and compare the 3D poi...
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The invention provides a laser fusion calibration method based on a 3D model. The time and processing cycle of designing a specific calibration block in the prior art can be effectively shortened, theproduction cost is reduced, and the laser adjustment parameter time is shortened. The method comprises the following steps: mounting a laser sensor on a movement mechanism, making a laser direction of the laser sensor be perpendicular to the movement direction, triggering the laser sensor in the movement process, and performing data collection to obtain latticed data; then supplementing the latticed data according to a trigger interval of the movement direction and the point interval of the laser to obtain 3D point cloud data; and finally, performing aligned comparison on the 3D point cloud data and the 3D model of a measured product to obtain a laser posture of the laser relative to the product.
Description
technical field [0001] The invention relates to the field of vision technology, in particular to a 3D model-based laser fusion calibration method. Background technique [0002] In the process of industrial production, quality control is becoming more and more important, and customers' requirements for measurement are also getting higher and higher. The commonly used image-based 2D measurement methods have been difficult to meet customer needs, and 3D-based measurement will be more and more important in the future. There are more and more application scenarios, among which calibration is the core issue of 3D measurement. At present, the commonly used calibration methods are based on calibration blocks, but there are several problems: [0003] 1. The 3D measurement scene is relatively complicated, and it takes a lot of effort to design the calibration block; [0004] 2. It takes effort to adjust the laser to be compatible with the scanning workpiece and the calibration block;...
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IPC IPC(8): G01B11/00
CPCG01B11/00
Inventor 田乃鲁何赛赛
Owner 苏州天准软件有限公司