Abstract
In traditional synchronized scanning system, the trajectory of the 3D scanning point is modeled as a circle when the thickness of rotated mirror is assumed to be zero. In this paper, a novel method to model the geometric measurement of synchronized scanning triangulation in the unfolded light path is proposed. Unlike most existing recent works, the 3D coordinate of the target is reasoned from the geometrical model, which includes all 14 system parameters. Further, the performance of the system precision can be analyzed and the importance of the thickness of rotated mirror is confirmed. In the experiment, a synchronized scanning system is developed. The experimental result demonstrates that the value of measurement uncertainty at a distance of 0.5m is 0.75mm and at a distance of 5m is 6.68mm. The standard deviations from the measurement point to the fitting plane at a distance of 0.5 m and 5 m are 1.10 mm and 19.73 mm, respectively.
Highlights
Laser triangulation technology is a method of non-contact measurement, overcoming the limitation of traditional measurement technology, which has the qualities of fast scanning speed, strong real-time, high precision, and intelligence
Haibo Zhang et al [25] proposed a novel method using prism-based optical structure to correct the nonlinear problem of laser triangulation displacement measurement and the results showed the nonlinear problem was significantly improved
We proposed a synchronized scanning trigonometric geometric parameter model based on unfolded light path
Summary
Laser triangulation technology is a method of non-contact measurement, overcoming the limitation of traditional measurement technology, which has the qualities of fast scanning speed, strong real-time, high precision, and intelligence. It has been widely used in production manufacturing [1,2,3], biomedical [4, 5], and cultural relics [6, 7]. When the scanner rotates an angle, the receiving light and the transmitting light have the same angle variation Because of this mechanism, the depth of field and the measuring range are greatly expanded. The experiment results show that the system can scan the object and display its point cloud
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