Research on the Detection Method of Projection Stellar Target Simulator
The projection stellar target simulator is a stellar target simulator in which star points are projected to be imaged on a fixed plane at a fixed distance. Compared with conventional stellar target simulators, the projection stellar target simulator makes star points visible and provides the necessa...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-09-01
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| Series: | Photonics |
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| Online Access: | https://www.mdpi.com/2304-6732/10/10/1101 |
| _version_ | 1827720119303798784 |
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| author | Jianan Kang Ru Zheng Lingyun Wang Chengwei Pang Guangxi Li |
| author_facet | Jianan Kang Ru Zheng Lingyun Wang Chengwei Pang Guangxi Li |
| author_sort | Jianan Kang |
| collection | DOAJ |
| description | The projection stellar target simulator is a stellar target simulator in which star points are projected to be imaged on a fixed plane at a fixed distance. Compared with conventional stellar target simulators, the projection stellar target simulator makes star points visible and provides the necessary condition for a semi-physical simulation test of the star camera. In this paper, the projection stellar target simulator optical system with high-quality imaging is designed by combining the projection technology, which breaks the collimated imaging of the conventional stellar target simulator optical system, and offers a new thought to solve the problem of decreasing the calibration accuracy caused by the influence of the coaxiality and other factors in the stellar target simulator calibrating the star camera. Based on the imaging behavior of the star map, this paper proposes a method to realize the automatic detection of a projection stellar target simulator by using CCD and introduces the composition and working principle of the detection system in detail. According to the imaging characteristics of star points, denoising and threshold segmentation of the star map are carried out, and an improved centroid algorithm is proposed to achieve high-precision positioning of the centroid coordinates of the star points. The measurement model and measuring formulas for the angular distance between stars are established. The error sources of the detection system are analyzed and obtain the theoretical error of 9.22″ for this detection system. The result of an actual test experiment shows that the position error of single star is less than 11″, in line with the theoretical analysis of the error, indicating the detection system has high detection precision and meets the requirement for the detection accuracy of the projection stellar target simulator. |
| first_indexed | 2024-03-10T20:58:00Z |
| format | Article |
| id | doaj.art-c92f70ad706a472eb4c63e3d5278550e |
| institution | Directory Open Access Journal |
| issn | 2304-6732 |
| language | English |
| last_indexed | 2024-03-10T20:58:00Z |
| publishDate | 2023-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Photonics |
| spelling | doaj.art-c92f70ad706a472eb4c63e3d5278550e2023-11-19T17:47:00ZengMDPI AGPhotonics2304-67322023-09-011010110110.3390/photonics10101101Research on the Detection Method of Projection Stellar Target SimulatorJianan Kang0Ru Zheng1Lingyun Wang2Chengwei Pang3Guangxi Li4School of Optoelectronic Engineering, Changchun University of Science and Technology, Changchun 130022, ChinaSchool of Optoelectronic Engineering, Changchun University of Science and Technology, Changchun 130022, ChinaSchool of Optoelectronic Engineering, Changchun University of Science and Technology, Changchun 130022, ChinaSchool of Optoelectronic Engineering, Changchun University of Science and Technology, Changchun 130022, ChinaSchool of Optoelectronic Engineering, Changchun University of Science and Technology, Changchun 130022, ChinaThe projection stellar target simulator is a stellar target simulator in which star points are projected to be imaged on a fixed plane at a fixed distance. Compared with conventional stellar target simulators, the projection stellar target simulator makes star points visible and provides the necessary condition for a semi-physical simulation test of the star camera. In this paper, the projection stellar target simulator optical system with high-quality imaging is designed by combining the projection technology, which breaks the collimated imaging of the conventional stellar target simulator optical system, and offers a new thought to solve the problem of decreasing the calibration accuracy caused by the influence of the coaxiality and other factors in the stellar target simulator calibrating the star camera. Based on the imaging behavior of the star map, this paper proposes a method to realize the automatic detection of a projection stellar target simulator by using CCD and introduces the composition and working principle of the detection system in detail. According to the imaging characteristics of star points, denoising and threshold segmentation of the star map are carried out, and an improved centroid algorithm is proposed to achieve high-precision positioning of the centroid coordinates of the star points. The measurement model and measuring formulas for the angular distance between stars are established. The error sources of the detection system are analyzed and obtain the theoretical error of 9.22″ for this detection system. The result of an actual test experiment shows that the position error of single star is less than 11″, in line with the theoretical analysis of the error, indicating the detection system has high detection precision and meets the requirement for the detection accuracy of the projection stellar target simulator.https://www.mdpi.com/2304-6732/10/10/1101optical systemCCDcentroid positioning of star pointsangular distance between stars |
| spellingShingle | Jianan Kang Ru Zheng Lingyun Wang Chengwei Pang Guangxi Li Research on the Detection Method of Projection Stellar Target Simulator Photonics optical system CCD centroid positioning of star points angular distance between stars |
| title | Research on the Detection Method of Projection Stellar Target Simulator |
| title_full | Research on the Detection Method of Projection Stellar Target Simulator |
| title_fullStr | Research on the Detection Method of Projection Stellar Target Simulator |
| title_full_unstemmed | Research on the Detection Method of Projection Stellar Target Simulator |
| title_short | Research on the Detection Method of Projection Stellar Target Simulator |
| title_sort | research on the detection method of projection stellar target simulator |
| topic | optical system CCD centroid positioning of star points angular distance between stars |
| url | https://www.mdpi.com/2304-6732/10/10/1101 |
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