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Open AccessArticle

A Liquid-Surface-Based Three-Axis Inclination Sensor for Measurement of Stage Tilt Motions

Department of Finemechanics, Tohoku University, Sendai 980-8579, Japan
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Author to whom correspondence should be addressed.
Sensors 2018, 18(2), 398; https://doi.org/10.3390/s18020398
Received: 20 December 2017 / Revised: 17 January 2018 / Accepted: 29 January 2018 / Published: 30 January 2018
(This article belongs to the Special Issue State-of-the-Art Sensors Technology in Japan 2017)
In this paper a new concept of a liquid-surface-based three-axis inclination sensor for evaluation of angular error motion of a precision linear slide, which is often used in the field of precision engineering such as ultra-precision machine tools, coordinate measuring machines (CMMs) and so on, is proposed. In the liquid-surface-based three-axis inclination sensor, a reference float mounting a line scale grating having periodic line grating structures is made to float over a liquid surface, while its three-axis angular motion is measured by using an optical sensor head based on the three-axis laser autocollimation capable of measuring three-axis angular motion of the scale grating. As the first step of research, in this paper, theoretical analysis on the angular motion of the reference float about each axis has been carried out based on simplified kinematic models to evaluate the possibility of realizing the proposed concept of a three-axis inclination sensor. In addition, based on the theoretical analyses results, a prototype three-axis inclination sensor has been designed and developed. Through some basic experiments with the prototype, the possibility of simultaneous three-axis inclination measurement by the proposed concept has been verified. View Full-Text
Keywords: three-axis measurement; inclination; linear slide; optical angle sensor; laser autocollimation three-axis measurement; inclination; linear slide; optical angle sensor; laser autocollimation
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Shimizu, Y.; Kataoka, S.; Ishikawa, T.; Chen, Y.-L.; Chen, X.; Matsukuma, H.; Gao, W. A Liquid-Surface-Based Three-Axis Inclination Sensor for Measurement of Stage Tilt Motions. Sensors 2018, 18, 398.

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