Proceedings of JSPE Semestrial Meeting
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2013 JSPE Spring Conference
Displaying 551-556 of 556 articles from this issue
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  • [title in Japanese]
    Tatsuya Murase, Yosimasa Sakai, Masao Sugi
    Session ID: T17
    Published: February 27, 2013
    Released on J-STAGE: August 27, 2013
    DOIhttps://doi.org/10.11522/pscjspe.2013S.0.1101.0
    CONFERENCE PROCEEDINGS FREE ACCESS
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    [in Japanese]
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  • Creation of the Walk Operation Using the Solutions of Repeated Direct Kinematics
    Taichi Katano, Yoshitsugu Kamiya, Hiroaki Seki, Masatoshi Hikizu
    Session ID: T18
    Published: February 27, 2013
    Released on J-STAGE: August 27, 2013
    DOIhttps://doi.org/10.11522/pscjspe.2013S.0.1103.0
    CONFERENCE PROCEEDINGS FREE ACCESS
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    [in Japanese]
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  • Effect of Traveling Voltage Wavelength on Electrostatic Induction Actuators Driving Performance
    Tommy Tram, Atsuhiro Maeda, Akio Yamamoto
    Session ID: U18
    Published: February 27, 2013
    Released on J-STAGE: August 27, 2013
    DOIhttps://doi.org/10.11522/pscjspe.2013S.0.1105.0
    CONFERENCE PROCEEDINGS FREE ACCESS
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    In the search for a stable and reliable thin sheet induction, there is an interest to control the optimal frequency by design of stator and slider. This paper investigates properties that affect the optimal frequency in driving surface-drive film actuators. Four different six-phase electrostatic actuators were designed, with 7.2 mm, 4.8 mm and 3.6 mm pitch respectively, to generate different wavelengths of traveling waves while keeping the same 0.04 mm electrode height. With a 1kVp-p applied excitation voltage, force and velocity performance of the slider was measured with a frequency range from 2 Hz to 1000 Hz. The experiments were conducted with regular plain paper copy paper as sliders, with a surface resistance between 1012 - 1013 Ω. The experimental results showed that the actuator with 3.6 mm wavelength has the highest optimal frequency between the three actuators and gave a better performance in both thrust force and velocity. The results also shows that the slider with 1012 Ω has its optimal frequency in higher frequency band. The information obtained from this study will prove useful as a basis for future design of this induction type electrostatic actuator.
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  • A Bidirectional Rotary Actuator Using Shape Memory Alloy Wires
    Donghyun Hwang, Shinya Hattori, Toshiro Higuchi
    Session ID: U19
    Published: February 27, 2013
    Released on J-STAGE: August 27, 2013
    DOIhttps://doi.org/10.11522/pscjspe.2013S.0.1107.0
    CONFERENCE PROCEEDINGS FREE ACCESS
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    This paper presents the design, fabrication, and experimental performance verification of a bidirectional rotary actuator using shape memory alloy (SMA) wires. To achieve more multifunctional and wider applicability in comparison with previously reported various types of SMA rotary actuator, a rotational driving mechanism based on wobble motor driving principle is devised and applied to the proposed rotary actuator. The rotational driving mechanism consists of a rotationally fixed rotor gear, a wobbling annular gear eccentrically engaged with the rotor gear, and three equal crankshafts. The wobbling motion of the annular gear is generated by sequentially activated three SMA wires, and this motion is guided as curvilinear translation due to triple parallel-crank-mechanism formed by the three crankshafts. Each SMA wire connected in series with a bias spring is electrically heated up, and it is cooled down by natural convection. In this research, a functional prototype is fabricated for experimental performance verification. For high gear efficiency, quiet and smooth operating, a cycloidal gear set is utilized for the actuator. With diverse activation sequencing methods, performance characterizations are conducted. The proposed SMA rotary actuator, based on its structural modularity and operational simplicity, is expected to be applied to diverse scientific and industrial fields.
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  • Development of Areal Wavelet Transform applying to the 2D image
    Taiju Suzuki, Hirotaka Ojima, Libo Zhou, Jun Shimizu, Teppei Onuki
    Session ID: U23
    Published: February 27, 2013
    Released on J-STAGE: August 27, 2013
    DOIhttps://doi.org/10.11522/pscjspe.2013S.0.1109.0
    CONFERENCE PROCEEDINGS FREE ACCESS
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    Today, there is an increased need for quality control in the manufacturing sectors. Particularly, the automated detection of the product surface defect is essential to fulfill the requirement of quality assurance. In this research, the algorithm of surface defect detection by use of wavelet transform has been developed. This method is established by one-dimensional wavelet filter. However, the image processing of 2D image for defect detection should be applied by two-dimensional filter. Therefore, in this report, a new wavelet transform is developed with 2D filter and the method is called for areal wavelet transform. This areal wavelet transform is investigated and is confirmed the efficacy.
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  • Wear monitoring of amorphous carbon films by embedding luminescent wear-sensing layer
    Atsawin Salee, Atsushi Hirata
    Session ID: U24
    Published: February 27, 2013
    Released on J-STAGE: August 27, 2013
    DOIhttps://doi.org/10.11522/pscjspe.2013S.0.1111.0
    CONFERENCE PROCEEDINGS FREE ACCESS
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    This work proposes a methodology to monitor the wear of tribological coatings by introducing a sensing layer between the coatings and substrate. The sensing mechanism is based on luminescence from the sensing layer when the coatings are worn out. In this work, the wear sensing layer consisting of as-purchased luminescence ZnS:Cu powder with particle size of 10-20 micrometers and epoxy resin (EP/ZnS:Cu) is initially fabricated. The as-prepared EP/ZnS:Cu coatings are subsequently coated with amorphous carbon (a-C) films by two deposition methods, i.e. sublimation of fullerene (C60) in electron beam excited plasma (EBEP) and pulsed vacuum arc deposition (VAD) methods. As-prepared EP/ZnS:Cu coatings show a green luminescence spectrum at the peak centre of 525 nm under irradiating with a UV light at 365 nm. After being coated with a-C films and irradiated with a UV light, the luminescence is undetected through a-C films. The performance of the coatings is investigated by a ball-on-disk friction test. It is found that after the a-C film is removed or worn out, the luminescence from the sensing layer is redetected. These results suggest the feasibility of wear monitoring of a-C film through the luminescent layer.
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