This paper describes a novel measurement method to accurately measure the rotating shaft tilt angle of rotating machine for alignment or compensation using a dual-axis inclinometer. A model of the rotating shaft tilt angle measurement is established using a dual-axis inclinometer based on the designed mechanical structure, and the calculation equation between the rotating shaft tilt angle and the inclinometer axes outputs is derived under the condition that the inclinometer axes are perpendicular to the rotating shaft. The reversal measurement method is applied to decrease the effect of inclinometer drifts caused by temperature, to eliminate inclinometer and rotating shaft mechanical error and inclinometer systematic error to attain high measurement accuracy. The uncertainty estimation shows that the accuracy of rotating shaft tilt angle measurement depends mainly on the inclinometer uncertainty and its uncertainty is almost the same as the inclinometer uncertainty in the simulation. The experimental results indicate that measurement time is 4 seconds; the range of rotating shaft tilt angle is 0.002° and its standard deviation is 0.0006° using NS-5/P2 inclinometer, whose precision and resolution are ±0.01° and 0.0005°, respectively.
If the inline PDF is not rendering correctly, you can download the PDF file here.
 Chen B. Zhang X. Zhang H. He X. Xu M. (2014). Investigation of error separation for three dimensional profile rotary measuring system. Measurement 47 627-632.
 Liu Z. Zhu J. Yang L. Liu H. Wu J. Xue B. (2013). A single-station multi-tasking 3D coordinate measurement method for large-scale metrology based on rotary-laser scanning. Measurement Science and Technology 24 (10) 105004.
 Prikhodko I.P. Zotov S.A. Trusov A.A. Shkel A.M. (2013). What is MEMS gyrocompassing? Comparative analysis of maytagging and carouseling. Journal of Microelectromechanical Systems 22 (6) 1257-1266.
 Mu-Jun X. Li-Ting L. Zhi-Qian W. (2012). Study and application of variable period sampling in strapdown north seeking system. Energy Procedia 16 2081-2086.
 Arnaudov R. Angelov Y. (2005). Earth rotation measurement with micromechanical yaw-rate gyro. Measurement Science and Technology 16 (11) 2300.
 Fang S. Liu Y. Wang H. Taguchi T. Takeda R. (2013). Compensation method for the alignment angle error of a gear axis in profile deviation measurement. Measurement Science and Technology 24 (5) 055008.
 Li K. Kuang C. Liu X. (2013). Small angular displacement measurement based on an autocollimator and a common-path compensation principle. Review of Scientific Instruments 84 (1) 015108.
 Tanachaikhan L. Tammarugwattana N. Sriratana W. Klongratog P. (2009). Declined angle analysis of shaft using magnetic field measurement. In ICCASSICE 18-21 August 2009. IEEE 1846-1849.
 Yang W. Fang B. Tang Y.Y. Qian J. Qin X. Yao W. (2013). A robust inclinometer system with accurate calibration of tilt and azimuth angles. IEEE Sensors Journal 13 (6) 2313-2321.
 Liu Y. Fang S. Otsubo H. Sumida T. (2013). Simulation and research on the automatic leveling of a precision stage. Computer-Aided Design 45 (3) 717-722.
 Kume T. Satoh M. Suwada T. Furukawa K. Okuyama E. (2015). Straightness evaluation using inclinometers with a pair of offset bars. Precision Engineering 39 173-178.
 Zhao S. Li Y. Zhang E. Huang P. Wei H. (2014). Note: Differential amplified high-resolution tilt angle measurement system. Review of Scientific Instruments 85 (9) 096104.
 Zhang Y. Liu W. Yang X. Xing S. (2015). Hidden Markov model - based pedestrian navigation system using MEMS inertial sensors. Measurement Science Review 15 (1) 35-43.
 Kume T. Satoh M. Suwada T. Furukawa K. Okuyama E. (2013). Large-scale accelerator alignment using an inclinometer. Precision Engineering 37 (4) 825-830.
 Štubňa I. Šin P. Trnik A. Vozar L. (2014). Measuring the flexural strength of ceramics at elevated temperatures - an uncertainty analysis. Measurement Science Review 14 (1) 35-40.