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7 March 2019 Precise measurement of large roll angle using digital speckle pattern interferometry
Jing Yang, Sijin Wu, Weixian Li, Fan Wu, Ji Liu, Lianxiang Yang
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Proceedings Volume 11053, Tenth International Symposium on Precision Engineering Measurements and Instrumentation; 1105343 (2019) https://doi.org/10.1117/12.2512422
Event: 10th International Symposium on Precision Engineering Measurements and Instrumentation (ISPEMI 2018), 2018, Kunming, China
Abstract
Recently, a non-cooperative method of roll angle measurement using digital speckle pattern interferometry (DSPI) is introduced. Mechanism was deduced and the mathematic model of roll angle measurement was established. The novel method also enjoys some other advantages, such as high-accuracy, stand-off, non-contact, and full-field measurement. However, this method is only used for precise measurement of very small roll angle which is up to a few milliradians due to the limitation of DSPI’s measuring range. In this article, a means of range enlargement for DSPI roll angle measurement is introduced. With this means, large roll angle can be divided into a number of small angles which are measured in sequence. Therefore, the large angle is then determined by calculating the sum of these small angles. The proposed method of roll angle is characterized by high-resolution and large-range measurement.
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Jing Yang, Sijin Wu, Weixian Li, Fan Wu, Ji Liu, and Lianxiang Yang "Precise measurement of large roll angle using digital speckle pattern interferometry", Proc. SPIE 11053, Tenth International Symposium on Precision Engineering Measurements and Instrumentation, 1105343 (7 March 2019); https://doi.org/10.1117/12.2512422
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KEYWORDS
Interferometry
Interferometers
Speckle pattern
Sensors
Optical interferometry
Mathematical modeling
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