Ms. Feiya Fu Profile

Feiya Fu

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Proceedings Article | 18 March 2024 Paper

Research on calculation method of vertical axis error for photoelectric theodolite

Tiejun Zhou, Yuanyuan Zhou, Qiuping Hu, Hao Lei, Feiya Fu

Proceedings Volume 13104, 1310443 (2024) https://doi.org/10.1117/12.3023555

KEYWORDS: Error analysis, Data modeling, Mathematical modeling, Data processing, Space operations, Radar, Optoelectronics

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The vertical axis is the reference axis of the photoelectric theodolite, and it is an important part that affects the measurement accuracy of the photoelectric theodolite. Therefore, it is necessary to measure, calculate and correct the vertical axis error of the photoelectric theodolite during the execution of the test task to ensure the accuracy and validity of the test data. The harmonic method to measure and calculate the vertical axis error of the photoelectric theodolite has a cumbersome process and complicated calculation. Aiming at the shortcomings of the harmonic method ,this paper establishes a new mathematical model for measuring the vertical axis error with a spirit level, and deduces the calculation methods in two cases. The comparison of the actual data calculation results shows that the calculation results of the method in this paper are consistent with the calculation results of the harmonic method and meet the test requirements. In addition, the method in this paper needs less measurement data and the process is simple, which is suitable for shooting range applications, which is more conducive to improving the testing ability of photoelectric theodolites, and also provides a reference for the accuracy analysis and error correction of photoelectric theodolites.

Proceedings Article | 30 August 2023 Paper

Real-time data fusion method of multiple photoelectric theodolites based on fault-tolerant mechanism

Chuangling Liu, Ke Zhao, Feiya Fu, Wei Wang

Proceedings Volume 12797, 127972Y (2023) https://doi.org/10.1117/12.3008193

KEYWORDS: Data fusion, Angle measurement, Relays, Detection and tracking algorithms, Tolerancing, Target recognition, Optical testing, Switching, Statistical analysis, Reliability

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A weighted fusion location method based on multilevel fault-tolerant mechanism is proposed to solve the problems of range relay test, real-time outlier elimination and false target tracking by a few equipment. Through the application of multilevel fault-tolerant algorithm, the target position can be calculated normally without identifying and eliminating the outliers of the measured data and the false targets of a few devices in the preprocessing stage. The weighted fusion positioning method is used to further improve the measurement accuracy. The simulation results show that the proposed method has a good fault-tolerance capability for the measured data, which can not only make full use of the measured data of photoelectric theodolite, but also perform positioning calculation and false target identification without outage elimination, so as to ensure the reliability of positioning results. In the process of changing target position and data source, the measurement data can be automatically selected for fusion processing, and the trajectory switching is smooth, which meets the requirements of relay measurement. At present, the proposed algorithm has been applied in a real-time fusion processing system of a shooting range, and has realized the accurate guidance of the photoelectric theodolite station that failed to capture and track in multiple measurement tasks

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