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大学院理工学研究科 システムデザイン工学専攻 機械工学コース |
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Angle detection using gyro signals rotating around four orthogonally aligned axes
Tatsuya Kume,†, Masanori Satoh, Tsuyoshi Suwada, Kazuro Furukawa, and Eiki Okuyama
International Journal of Automation Technology ( International Journal of Automation Technology ) 14 ( 1 ) 52 - 58 2020年01月 [査読有り]
研究論文（学術雑誌）
<p>An angle sensor can be used to evaluate profiles without any shape references. We regard it suitable for evaluating a large profile and consider a gyro as an angle sensor for evaluating a profile larger than 100 m with an accuracy of better than 1 mm. A gyro can evaluate profiles without restrictions in span or direction; however, angles detected by a gyro typically fluctuate unacceptably for our purpose. We demonstrate that periodical reversal measurement by flipping a gyro is effective in reducing the effect of the fluctuation. Then, we rotate the gyro for continuously realizing the reversal, where the angles of the gyro's rotating axis against the earth's rotating axis can be derived without being affected by the fluctuation, and can be used as an angle sensor. Here, we consider a new method using gyro signals rotating around four orthogonally aligned axes. This can improve the accuracy of the derived angles by eliminating the effects of the gyro's scale factor as well as the fluctuations.</p>
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Surface Profile Measurement Based on the Concept of Multi-Step Division of Length
Eiki Okuyama†, Kohei Konda, and Hiromi Ishikawa
International Journal of Automation Technology 11 716 2017年09月 [査読有り]
研究論文（学術雑誌） 国内共著
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Combination of double scale measurements for large scale surface profile measurement
Eiki OKUYAMA, Masayuki ITO
Measurement Technology and Intelligent Instruments XII 2017年09月 [査読有り]
研究論文（学術雑誌） 国内共著
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Development of a Surface Roughness Measurement System in a Narrow Borehole
Eiki OKUYAMA, Yuichi SUZUKI, Masahiro MORIKAWA, Yuma SUZUKI and Ichiro YOSHIDA
International Journal of Automation Technology 10 ( 5 ) 821 - 826 2016年09月 [査読有り]
研究論文（学術雑誌） 国内共著
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Roundness Profile Measurement Using a Combination Method of Three-Point Method for Roundness Profile Measurement and Integration Method for Straightness Profile Measurement
Okuyama Eiki, Fukuda Takato
International Journal of Automation Technology ( 富士技術出版株式会社 ) 18 ( 1 ) 77 - 83 2024年01月
<p>A three-point method has been used to separate the roundness profile of a workpiece and radial motions of a turntable. First, weighted addition is used to extract the roundness profile, and then, inverse filtering is used to recover the original roundness profile. The three-point method works well in the low spatial frequency domain. However, in the high spatial frequency domain, the setting angle error of the sensor causes a large deflection of the transfer function. Therefore, a combination method of the three-point method for roundness profile measurement and an integration method for the straightness profile measurement is proposed. The three-point method for roundness profile measurement is used to estimate low spatial frequency domain and the integration method for straightness profile measurement is used to estimate the high spatial frequency domain. Experimental results showed that the standard deviation of the combination method was smaller than that of the three-point method for most positions.</p>
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Okuyama E.
Measurement: Sensors ( Measurement: Sensors ) 18 2021年12月
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奥山 栄樹, 清野 慧
精密工学会誌 ( 公益社団法人 精密工学会 ) 85 ( 4 ) 347 - 351 2019年04月
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板東 暢彦, 奥山 栄樹, 浜野 康雄
年次大会 ( 一般社団法人 日本機械学会 ) 2019 ( 0 ) 2019年
<p>In various industrial fields, it is frequently necessary to measure surface roughness in confined spaces such as boreholes and grooves. We already proposed a novel surface roughness measurement sensor for small boreholes. To make the surface roughness sensor small, we used a stylus with a cylindrical mirror and a lensed fiber instead of a conventional inductive pick-up. However, experimental results showed that this system had only 8 μm measurement range. To expand the measurement range, we proposed a new stylus. Experimental results showed 62μm measurement range. In this article, we propose null method.</p>