High-precision closed-loop tracking of moving targets based on rotational double prisms

Yuan, Longyan; Li, Jinying; Huang, Yongmei; Ma, Rongqi; Shi, Jing; Wang, Qiang; Wen, Piao; Ma, Haotong; Li, Ming; Wang, Zihao

doi:10.1117/1.oe.60.11.114107

Cited by 8 publications

(2 citation statements)

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“…13 Studies have also focused on enhancing prism structures, including introducing a third prism to address blind spot and singularity issues, 14,15 using two pairs of prisms 16,17 for coarsefine scanning, 18 employing a combination of material prisms to solve dispersion problems, 19 and utilizing grating prisms for multi-resolution imaging. 20 With fast response, high accuracy, compactness, and robustness, these scanners have been used in various applications, such as target search and identification, 21 large field-of-view imaging, 22 biomedical observation, 10 laser communication, 23 beam-scanning detection, 13,24 vision-based microassembly, 25 etc.…”

Section: Introductionmentioning

confidence: 99%

Path optimization of cascaded prism scanning beam defined by the rotation prism coordinate system

Li,

Liu,

Zhou

2024

Opt. Eng.

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Disordered multi-target scanning is an important application scenario of lidar target tracking technology. However, when dealing with scanning beam paths steered by cascaded prisms, it presents notable challenges, including highly non-linear and strongly coupled characteristics between the output vectors and prism rotation angles. Additionally, due to prismatic independence, there is no available coordinate system for visually observing the state of multiple prisms and the transitions between these states. In this work, we propose a rotation prism coordinate system, which offers coordinate conversion methods and mathematical expressions for distances. Two scanning modes, the fastest mode, and the shortest mode, along with two criteria, the total distance difference, and path curvature, are proposed for facilitating path selection and adhering to physical restrictions. To tackle the equivalent point-traveling salesman problem within this coordinate system, we employ an ant colony-taboo fusion algorithm. Our experiment results demonstrate a substantial improvement in efficiency, with up to a 2.77-fold enhancement compared to the original technique. This approach presents a promising solution for addressing the complexities of multi-target scanning with cascaded prisms in lidar target tracking. Future applications include environmental detection, rapid scanning and mapping, and identification of assembly parts in chaotic scenarios.

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Section: Introductionmentioning

confidence: 99%

Path optimization of cascaded prism scanning beam defined by the rotation prism coordinate system

Li,

Liu,

Zhou

2024

Opt. Eng.

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“…The RDPS research includes scanning [ 19 , 20 , 21 , 22 ], pointing [ 23 , 24 , 25 , 26 ], tracking [ 27 , 28 , 29 , 30 , 31 , 32 ], and similar applications. Calculating the rotation angle of each prism according to the azimuth and elevation angles is called the inverse solution.…”

Section: Introductionmentioning

confidence: 99%

Demonstration of a Fizeau Directly-Imaging Sparse-Aperture Telescope with Pointing and Tracking Capabilities

et al. 2023

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At present, the majority of sparse-aperture telescopes (SATs) are unable to observe moving targets. In this paper, we describe the construction of and present the results obtained using a Fizeau directly-imaging sparse-aperture telescope (FDISAT) that permits pointing and the tracking of moving targets. The telescope comprises three sub-apertures, each of which is equipped with a Risley prism system that permits a maximum tracking range of 5° and has independent boresight adjustment capability. On targets in various positions, experiments with pointing and tracking are conducted. The maximum root-mean-square error (RMSE) of pointing in the sub-apertures was found to be 8.22 arcsec. When considering a target moving at 0.01°/s for approximately 320 s, the maximum RMSE of tracking in the sub-apertures was found to be 4.23 arcsec. The images obtained from the focal plane detector exhibit clear interference fringes while tracking. The experimental results demonstrate that the system can effectively track moving targets, providing a method for SAT observation of moving targets.

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Rotation matrix error-decoupling methods for Risley prism closed-loop tracking

Yuan

Xia

et al. 2022

Precision Engineering

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High-precision closed-loop tracking of moving targets based on rotational double prisms

Cited by 8 publications

References 0 publications

Path optimization of cascaded prism scanning beam defined by the rotation prism coordinate system

Path optimization of cascaded prism scanning beam defined by the rotation prism coordinate system

Demonstration of a Fizeau Directly-Imaging Sparse-Aperture Telescope with Pointing and Tracking Capabilities

Rotation matrix error-decoupling methods for Risley prism closed-loop tracking

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