Straightness evaluation using inclinometers with a pair of offset bars

Kume, Tatsuya; Satoh, Masanori; Suwada, T.; Furukawa, K.; Okuyama, Eiki

doi:10.1016/j.precisioneng.2014.08.006

Cited by 8 publications

(2 citation statements)

References 10 publications

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“…Fig.17. is plotted based on the θ X1 , θ Y1 , θ X2 , θ Y2 we recorded; the red lines are the simulation results according to (3), (6) and (7), the blue ones are experiment points which are calculated according to (10) and (11). It is clear that the deviations of α and β are fairly small and the rotating shaft tilt angle remains stable when torque motor rotates the shaft.…”

Section: One Circle Measurementmentioning

confidence: 96%

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Rotating Shaft Tilt Angle Measurement Using an Inclinometer

Luo

Wang

Shen

et al. 2015

Measurement Science Review

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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.

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Section: One Circle Measurementmentioning

confidence: 96%

“…In our method, θ X and θ Y are calculated by reversal measurement to achieve high accuracy. Let us have a look on (9) and (11). Firstly, the outcome of θ X (α) and θ Y (β) does not include δ 1 and δ 2 , so the mechanical errors are eliminated.…”

Section: Reversal Measurementmentioning

confidence: 99%