Mr. Fan Wang Profile

Fan Wang

at National Institute of Metrology

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Publications (2)

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Proceedings Article | 19 November 2021 Paper

Research on electronic inclinometer calibration method and uncertainty budget based on GUM method

Yu Yang, Wei Zou, Fan Wang

Proceedings Volume 12059, 1205908 (2021) https://doi.org/10.1117/12.2611250

KEYWORDS: Calibration, Metrology, Uncertainty analysis

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An electronic inclinometer can measure the angle between faces or between a face and a horizontal plane. In recent years, electronic inclinometers have played an important role in bridge monitoring, medical devices calibration, and aerospace, with a wider measuring range and higher accuracy. However, there are few studies on the calibration methods and uncertainty budget of the electronic inclinometer. In this paper, the traceability chain, calibration environment, measurement standard, and calibration method are investigated to provide a direct measurement method to calibrate the indication error of the electronic inclinometer by using the dividing head as a standard angle generator and a special fixture. A mathematical model is established, and the uncertainty budget is performed for the calibration result of the indication error. The result shows that the ratio of the expanded uncertainty of the electronic inclinometer to the indication error is less than 1»3. Thus, a feasible calibration method for the indication error of the electronic inclinometer is obtained.

Proceedings Article | 13 November 2019 Paper

The calibration of angular velocity deviation among full rotary circle

Fan Wang, Zi Xue, Yao Huang

Proceedings Volume 11343, 113431S (2019) https://doi.org/10.1117/12.2548793

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To evaluate the angular velocity accuracy and uniformity among 0°~360° of a rotary table, two real-time angular position measuring systems were setup base on self-calibration angle encoder and ring-laser gyroscope (RLG) separately. The angular position acquisition triggered by programmable clock enabled angular velocity measurement with flexible angular interval, and realize the angular velocity calibration of the rotary table with required angular interval among full rotary circle. The calibration results obtained from self-calibration angle encoder and ring-laser gyroscope were identical and provided a series of detailed angular velocity deviation curves.The angular velocity deviation demonstrated periodic feature among 0°~360°. A series of comparisons were carried out, and then the relation between the angular velocity deviation and angular position deviation was analyzed on both of dimensional domain and Fourier domain.

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