Mr. Zhenkun Wang Profile

Zhenkun Wang

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Proceedings Article | 4 April 2023 Paper

Study on time deviation detection method and experiment of photoelectric theodolite camera

Xin Zhou, Zhenkun Wang, Rui Cao, Xuyang Li, Yanfang Li, Xiaogang Zhu, Kunjun Hu, Xiang Zhai

Proceedings Volume 12617, 1261724 (2023) https://doi.org/10.1117/12.2664755

KEYWORDS: Light emitting diodes, Cameras, Calibration, Time metrology, Signal processing, Image processing, Lamps, Design and modelling, Data analysis, Visible radiation

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When the photoelectric theodolites are used to measure the same object, the values of timing equipment between the devices have deviation as well as the response of the camera and other devices also has difference. This situation leads to certain deviation of the synchronization of each device. At the same time, the exposure time of the camera deviates from the set value, which affects both the center exposure system and the front exposure system. The above situation leads to the time misalignment error of the target image when multiple photoelectric theodolites synchronously observe the same target. This error affects the accuracy of data processing and makes the calculation result unable to meet the measurement equipment of high accuracy undershoot. To measure the exposure time and the time deviation between camera, this paper studied the detection method based on calibrating lamp and experimented with this method. As a result, the detection method based on calibrating lamp can be used to measure exposure time both in visible light and shortwave as well as the time deviation detection. The detection accuracy is up to 5us. This method can be widely used in the camera detection of time deviation in optical equipment.

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